KARAT Members

Martina Anto-Ocrah, PhD, MPH, MT(ASCP)

Division/Institute: General Internal Medicine
Mentors: Jeffrey Bazarian, MD, MPH (external) / Amy Wagner, MD / Doris Rubio, PhD
Career Development Award:  NINDS K01

Research

Dr Martina Anto-Ocrah is an Assistant Professor of Medicine & Epidemiology whose research centers on pregnancy, sexual & reproductive health epidemiology in United States (US) and global populations. As a reproductive epidemiologist, Dr Anto-Ocrah’s US-based work explores the impact of traumatic brain injuries on women’s reproductive wellbeing (pregnancy, sexuality, menstruation, socio-cultural norms, etc); while her global health work is focused on obstetric emergencies and The Three Delays (hyperlink to this article https://pubmed.ncbi.nlm.nih.gov/31931748/).Though a quantitative methodologist, Dr. Anto-Ocrah has a deep appreciation for mixed methods research and often involves qualitative research methodologies and machine learning approaches in her work.

William Bain, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentor: Janet Lee, MD / Jessica Bon Field, MD, MS
Career Development Award:  VA Mentored Research Scientist Development Award

 

Research

Dr. Bain’s research goal is to improve understanding of how the lung interacts with and employs cellular and humoral elements of innate immunity to combat pathogens and manage injury. He is currently focused upon two research questions. First, how do platelets and platelet factors attenuate lung injury during pathogen-mediated lung injury with particular attention to the role of platelet released factors in providing protection to alveolar epithelium? Second, what are mechanisms by which alternative complement pathway function supports host defense and patient survival during critical illness with acute respiratory failure?

Ian Barbash, MD, MS

Division/Institute: Pulmonary, Allergy and CCM
Mentor:
Jeremy Kahn, MD, MS
Career Development Award:  AHRQ K08

 

Research

Dr. Barbash is a health services researcher focused on the intersection of health policy and critical care delivery and outcomes; in this work he uses large datasets derived from administrative claims and electronic health records. His K08, funded by the Agency for Healthcare Research and Quality, examines the effect of Medicare’s SEP-1 sepsis bundle reporting policy on sepsis treatment and outcomes. He is also involved in clinical administrative and quality improvement activities in the UPMC Health System, which both inform and are informed by his health services research.

Mehret Birru-Talabi, MD, PhD

Division/Institute: Rheumatology
Mentor:
Sonya Borrero, MD, MS
Career Development Award:  NIAMS K23

 

Research

Mehret Birru Talabi, MD PhD is a physician investigator in rheumatology and clinical immunology. She is a graduate of Kenyon College, and received her MD, PhD in Epidemiology, and internal medicine and rheumatology subspecialty training at the University of Pittsburgh and at UPMC. Her research focuses on the intersection of rheumatology and women’s health, with a specific interest in enhancing reproductive outcomes among people with rheumatic diseases. She is an Assistant Dean and Co-Director of the Medical Scientist Training Program (MSTP) in the School of Medicine and is the associate program director of the UPMC rheumatology fellowship. 

Corry D. Bondi, PhD, MS

Division/Institute: Renal-Electrolyte
Mentors: Roderick Tan, MD, PhD / Neil Hukriede, PhD
Career Development Award:  NIDDK K01

 

Research
Chronic kidney disease (CKD) affects an estimated 700 million people worldwide and can ultimately progress to renal failure and the need for dialysis or transplantation. A hallmark of CKD is proteinuria, and this is associated with an overall worse prognosis and greater likelihood of disease progression. Even though proteinuria has traditionally been viewed as a glomerular injury, the contribution of renal tubules to glomerular dysfunction has largely been neglected. This crosstalk may involve the β-catenin/MCP-1 pathway. My investigation is driven by the hypothesis that the β-catenin-mediated release of MCP-1 from the kidney tubules mediates glomerular injury in proteinuric CKD. I am using conditional cell-specific knockout mice and primary cells to test this hypothesis. The results will identify intercellular signaling pathways in the kidney that may lead to novel treatments for proteinuric CKD.

Cary Boyd-Shiwarski, MD, PhD

Division/Institute: Renal-Electrolyte
Mentors: Arohan Subramanya, MD / Tom Kleyman, MD
Career Development Award:  NIDDK K08

 

Research

As a physician-scientist, Dr. Boyd-Shiwarski’s research focuses on the role of dietary potassium in hypertension and chronic kidney disease. Deficiencies in dietary potassium are known to increase blood pressure and increase the progression of chronic kidney disease (CKD). Unfortunately, there are large gaps in scientific knowledge regarding how and why potassium deficiency leads to hypertension and CKD. This project focuses on the effect of potassium depletion at the molecular level, studying potassium sensing and handling by the kidney. Her laboratory has identified a complex of WNK (with-no-lysine) kinases that form signaling microdomains in the kidney during potassium depletion and refers to these complexes as “WNK bodies”. In recent years, there has been a growing appreciation that the cytosol can demix into distinct microdomains, to concentrate and control biological processes. Thus, the WNK bodies appear to represent a new type of “biomolecular condensate” that concentrates WNK-dependent signaling processes in the kidney in response to potassium depletion. The formation of the WNK body microdomain is dependent upon the expression of kidney-specific WNK1 (KS-WNK1). By studying mice that are unable to form WNK body complexes (KS-WNK1-/- mice), she is beginning to understand the role of WNK bodies during potassium disequilibrium.

Hailey Bulls, PhD

Division/Institute: General Internal Medicine
Mentors:
Yael Schenker, MD, MAS / Jessica Merlin, MD, PhD, MBA
Career Development Award:  Pitt CTSI KL2; NCI K08

 

Research

Hailey W. Bulls, PhD, joined the Section of Palliative Care & Medical Ethics as Assistant Professor in 2019. She completed her PhD in Medical/Clinical Psychology at the University of Alabama at Birmingham, with a pre-doctoral internship at the James A. Haley VA and an R25-funded postdoctoral fellowship in Behavioral Oncology at Moffitt Cancer Center in Tampa, FL. Broadly, Dr. Bulls’ current research focuses on 1) mitigating the impact of opioid stigma on cancer patients with pain; 2) early identification cancer patients at risk for pain and neuropathy; and 3) novel behavioral interventions to better manage pain. She was recently selected for the Clinical and Translational Science Scholars Program (KL2) in support of this research. Dr. Bulls also evaluates experimental models of pain sensitivity and modulation using actigraphy and quantitative sensory testing. In the clinic, Dr. Bulls specializes in cognitive-behavioral interventions for acute and chronic pain. Dr. Bulls is an active #AcademicTwitter user: follow her at @hwbulls. Outside of the office, she enjoys exploring her new city, traveling, kickboxing, eating soup dumplings, solving crossword puzzles, and cheering on the Florida Gators.

Aravind Cherukuri, MBBS, PhD

Division/Institute: Renal-Electrolyte
Mentors:David Rothstein, MD and Harinder Singh, PhD
Career Development Award:  NIAID K08

 

Lan Coffman, MD, PhD

Division/Institute: Hematology/Oncology
Mentor: Ronald J. Buckanovich, MD, PhD
Career Development Award:  NCI K08
Research

My research focuses on understanding and targeting the cancer supporting stromal tissues which are critical to the survival, growth and spread of ovarian cancer. Specifically, my lab studies a critical non-malignant component of the ovarian cancer microenvironment, the carcinoma-associated mesenchymal stem cell (CA-MSC). CA-MSCs are stromal progenitor cells which significantly increase cancer growth, enrich the cancer stem cell pool and increase chemotherapy resistance.
My lab studies how CA-MSCs are formed and develop tumor supporting properties. My lab also focuses on identifying important tumor cell:CA-MSC interactions which mediate CA-MSC’s pro-tumorigenic functions and have potential for translation into new therapeutic targets. Additionally, we study how CA-MSCs impact the development of ovarian cancer metastasis and the metastatic microenvironment.
The ultimate goal of my research is to translate novel laboratory findings into powerful therapeutic approaches for the prevention and treatment of ovarian cancer.

Jason B Colditz, PhD, MEd

Division/Institute: General Internal Medicine
Mentor:
Career Development Award: NIAAA K01

Malamo Countouris, MD, MS

Division/Institute: Cardiology
Mentors: Flordeliza Villanueva, MD (primary); Janet Catov, PhD; Adam Straub, PhD
Career Development Award:  AHA CDA

Research
Women with preeclampsia, a hypertensive disorder of pregnancy, suffer a higher risk of cardiovascular disease than their non-preeclamptic counterparts in the decades after pregnancy, yet the mechanisms of heightened risk are poorly understood, and hence approaches for prevention are unknown. Preliminary data from this candidate’s T-32 postdoctoral fellowship showed that women with prior preeclampsia, in combination with current hypertension, have the highest likelihood of echocardiographically-defined left ventricular remodeling in the decade after delivery. These data drive a novel “two-hit” hypothesis, whereby both preeclampsia and hypertension confer higher risk for adverse left ventricular remodeling than either attribute alone. Further, given that left ventricular remodeling portends a worse cardiovascular prognosis, understanding its features and mediators in women with preeclampsia and hypertension is critical to developing prevention therapies. Thus, the overarching goal of this research program is to phenotype and define mechanisms of left ventricular remodeling among women with prior preeclampsia. Specifically, this proposal will investigate underlying mechanisms leading to left ventricular remodeling through interrogating the myocardial composition of the remodeled left ventricle (fibrosis and cardiomyocyte hypertrophy), as measured via cardiac MRI (AIM 1). Detailed biomarker measurements will be used test hypotheses implicating inflammation pathways and the renin-angiotensin-aldosterone system, and then correlated with specific myocardial changes on cardiac MRI (AIM 2). Demonstrating causal pathways in the development of cardiac remodeling will provide essential preliminary data for a targeted, R01-funded, clinical trial and be a major step in prevention of cardiovascular disease in high-risk women with prior preeclampsia.

Matthew Culyba, MD, PhD

Division/Institute: Infectious Diseases
Mentor: Neil Clancy, MD
Career Development Award:  NIAID K08

 

Research
The Culyba Lab fuses molecular and biochemical methodologies with experimental microbial evolution to study mutational phenomena and bacterial adaptation. Mutation and gene transfer events are the source of heritable variation for evolution. These genome diversifying processes can range from being relatively site-specific in the genome to being nearly random. Furthermore, beyond the mutations themselves, the DNA damage and DNA repair events associated with mutagenesis can also be deleterious to the host and are subject to multiple levels of active regulation by cells. Understanding how microorganisms respond to their environments and control the rate and specificity of mutagenesis is the focus of the laboratory. Ongoing studies are aimed at elucidating the (i) molecular mechanisms which regulate mutational phenomena in bacteria during transitions to new environments, (ii) molecular specificity determinants of enzymes involved in mutational phenomena, and (iii) new methods for tracking and detecting mutations in populations of cells. Research projects in the lab are designed to inform a variety of pressing scientific challenges, including combating the crisis of antimicrobial resistance and building a comprehensive model of molecular evolution.

Matthew Dent, PhD

Division/Institute: Vascular Medicine Institute
Mentors: Mark T. Gladwin, MD (external) / Jesus Tejero, PhD / Jason J. Rose, MD (external)
Career Development Award:  NHLBI K99/R00

Research

My research aims to better understand the physiological and pathophysiological roles of the smallest molecules found in biology: nitric oxide (NO), hydrogen sulfide (H2S/HS-), and carbon monoxide (CO). Commonly known as toxic by-products from anthropogenic sources, these molecules (often referred to as “gasotransmitters” or “diatomic bioregulators”) are also produced via endogenous metabolic processes in living systems throughout all kingdoms of life. In humans, these molecules are involved in signaling cascades that regulate vascular tone, inflammation, circadian rhythm, sensory perception, and cell proliferation, among many others. As the scope of these critical signaling molecules continues to grow, new tools are needed to assess their spatiotemporal dynamics in living systems. My work couples techniques in protein engineering and biochemistry with cellular and preclinical animal models to 1) develop new treatment strategies for toxic exposure to these diatomic molecules, and 2) design and implement molecular visualization tools that can be used to understand how these molecules function as bioregulatory signals. Specifically, this project focuses on engineering a selective, high-affinity CO sensor protein from bacteria into a CO-scavenging therapeutic to treat acute CO poisoning. Using the same protein scaffold, I also seek to develop a genetically encoded fluorescent reporter that can be used to track endogenous CO signaling dynamics in cells and living organisms.

Karlyn Edwards, PhD

Division/Institute: General Internal Medicine
Mentors: Jessica Merlin, MD, PhD, MBA / Jane Liebschutz, MD, MPH
Career Development Award:  NIDA K12

Research
Dr. Edwards is an Assistant Professor in the Division of Internal Medicine, a CHAMPP Core Investigator, and a NIDA K12 junior faculty scholar. Her research work spans three lines of inquiry: 1) effective delivery and mechanisms of behavioral interventions for chronic pain, 2) characterizing psychosocial processes that contribute to substance misuse and pain, and 3) developing and testing integrated behavioral treatments for chronic pain and opioid use disorder. She is a licensed clinical psychologist and has expertise in tailoring and delivering acceptance-based behavioral interventions, such as Acceptance and Commitment Therapy and Mindfulness-based Relapse Prevention.

John Evankovich III, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentor: Bill Chen, PhD
Career Development Award:  NHLBI K08

 

Research

Dr. Evankovich studies the molecular biology of lung injury. His laboratory is interested in the intersection of three molecular systems in the innate immune system, and how they influence inflammation and cell death pathways in the lung. The molecular systems are Damage Associated Molecular Patterns (DAMPs), DAMP Receptors, and the Ubiquitin/Proteasome System (UPS).

Dr. Evankovich’s prior work has identified how several novel DAMP/DAMP receptor pairs are processed for disposal in the UPS, and how this process can be manipulated to change subsequent cellular responses. For damaging responses, increasing targeted DAMP receptor disposal through the UPS could lessen organ damage; likewise, for protective DAMP/DAMP receptor pairs, reducing disposal in the UPS could be therapeutic to reduce injury.

Teaming with the Small Molecule Therapeutics Center, Dr. Evankovich’s future work aims to discover novel small molecules to disrupt these pathways and test in preclinical models of lung injury. He is also an Associate Member of the Aging Institute, where he focuses on the contribution of aging to innate immune responses in the lung.

Ning Feng, MD, PhD

Division/Institute: Cardiology/Vascular Medicine Institute
Mentors: Iain Scott, PhD / Toren Finkel, MD, PhD
Career Development Award:  NHLBI K08

 

Marc Gauthier, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentors: Anuradha Ray, PhD / Sally Wenzel, MD
Career Development Award:  Parker B. Francis Foundation

 

Ghady Haidar, MD

Division/Institute: Infectious Diseases
Mentors: Neil Clancy, MD / Alison Morris, MD, MS
Career Development Award:  NIAID K23

 

Research

My research interest lies in infectious complications among immunocompromised hosts, primarily organ transplant recipients and patients with hematological malignancies. My K23 award focuses on the changes in the gut microbiome among lung or liver transplant recipients as they develop colonization or infection with multidrug-resistant organisms. My hope is to use this knowledge to conduct clinical trials of novel therapies such as fecal microbiota transplant or bacteriophages to treat drug-resistant organisms in these patients. I also have an interest in COVID-19 in this patient population, particularly oncology patients who are at risk for protracted SARS-CoV-2 replication and intra-host viral evolution.

Dennis Hsu, MD

Division/Institute: Hematology/Oncology
Mentors:
Career Development Award:  Physician-Scientist Training Award (Damon Runyon Cancer Research Foundation)
 
Research
The genetic information in our DNA encodes for proteins using the genetic code which consists of 61 codons (nucleotide triplets) encoding 20 amino acids. Codons are recognized by transfer RNA (tRNA) molecules which specifically recognize codons and help deliver the correct amino acid needed for making a protein. My research focuses on how tRNA levels are modulated during cancer starvation and how this may adaptively facilitate the expression of certain proteins and allow for survival. The major focus of my work is to understand how these changes allow cancer cells to survive in nutrient-poor environments which may potentially lead to new therapeutic strategies to treat cancers that are under metabolic stress.

Raagini Jawa, MD, MPH

Division/Institute: General Internal Medicine
Mentors: Jane Liebschutz, MD, MPH / Jessica Merlin, MD, PhD, MBA / Cristina Murray-Krezan, PhD
Career Development Award:  NIDA K12

Research
Dr. Jawa is an Assistant Professor and Clinician Investigator in the Department of General Internal Medicine at University of Pittsburgh Medical Center and a clinician investigator in the Center for Research on Health Care. She is board certified in Internal Medicine and Infectious Disease and Addiction Medicine. Dr. Jawa’s research interests focus on the intersection of Infectious Disease and Addiction, including studying how to optimize integration of harm reduction services for individuals with substance use disorders within traditional health settings, developing multidisciplinary provider facing interventions to prevent infectious and non-infections complications of drug use. Clinically, she provides office-based addiction treatment in IM Recovery Engagement Program and attends on the Endovascular Infection Service at UPMC.

Charles Jonassaint, PhD, MHS

Division/Institute: General Internal Medicine
Mentors:
Career Development Award:  NHLBI K23

Georgios Kitsios, MD, PhD

Division/Institute: Pulmonary, Allergy and CCM
Mentors: Alison Morris, MD, MS / Bryan McVerry, MD
Career Development Award:  NHLBI K23

 

Research
My translational research focuses on the development of microbial DNA sequencing-based diagnostics for pneumonia and sepsis in the intensive care unit, to improve upon major deficiencies in sensitivity and timeliness of the current culture-dependent diagnostic paradigm. My work further examines the ability to define ARDS subphenotypes from lung microbiome profiles and host innate immune response to explain the clinical heterogeneity of the syndrome and allow for better targeting of interventions. I am also interested in the impact of the gut microbiome on critical illness outcomes and the use of microbial replacement therapies with fecal transplant for the eradication of multidrug-resistant organisms in chronically critically-ill patients.

Ioannis Konstantinidis, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentors: Alison Morris, MD, MS / Katie Suda, PharmD, MS / Scott Rothenberger, PhD
Career Development Award:  NHLBI K08
Research
Dr. Konstantinidis is a physician investigator focused on HIV-associated lung disease using cohort study data as well as large datasets from administrative claims and electronic health records. His K08, funded by the National Heart, Lung, and Blood Institute, aims to perform a cohort study of HIV-infected and uninfected comparators with COPD using administrative and electronic health record data from multiple health systems across the US and a causal inference framework to identify modifiable risk factors for COPD exacerbations and poor outcomes and to investigate the links between processes of care and outcomes in people with HIV. Ultimately, this research will inform efforts to develop effective management strategies for high-quality COPD care in people with HIV.

Travis Lear, PhD

Division/Institute: Aging Institute
Mentors: Toren Finkel, MD, PhD / Stacey Rizzo, PhD / Bill Chen, PhD
Career Development Award:  NIA K99
Research
My research interest is to understand how manipulating the activity of autophagy and lysosomal biology affects the clearance of pathological protein aggregation in neurodegeneration. Alzheimer’s disease and related dementias (ADRD) are the most common neurodegenerative diseases, afflicting over 6 million patients in the USA alone. Protein aggregation, including of the microtubule associated protein, tau, are thought to be a key in the pathogenesis of ADRD. Protein aggregates are naturally processed and degraded through cellular mechanisms such as the autophagy-lysosomal pathway, leading to protein degradation in the acidic lysosome compartment. Promoting lysosomal activity to aid in the clearance of tau has emerged as a potential therapeutic avenue. Specifically, this project involves investigating the ubiquitin-proteasome system dependent regulation of mTOR activity to enhance lysosomal activity and characterizing the mechanistic and functional effects on autophagy and protein aggregation in neuronal cells.

Carissa Low, PhD

Division/Institute: Hematology/Oncology
Mentor: John Jakcic, PhD
Career Development Award:  NCI K07
Research
Carissa A. Low, PhD, is an Assistant Professor of Medicine, Psychology, and Biomedical Informatics and Director of the Mobile Sensing and Health Institute at the University of Pittsburgh (www.moshi.pitt.edu) and Adjunct Faculty in the Human-Computer Interaction Institute at Carnegie Mellon University. Her research focuses on leveraging mobile technology for remote patient monitoring as well as delivery and personalization of behavioral interventions during and after cancer treatment. Her NCI Career Development Award aimed to design and test a just-in-time smartwatch intervention to reduce sedentary behavior before and after cancer surgery. Other work is aimed at using mobile sensors for real-time detection of severe symptoms or other significant health changes during chemotherapy, for self-management of fatigue and other treatment side effects, and to support family caregivers.

Jing Luo, MD, MPH

Division/Institute: General Internal Medicine
Mentor: Walid Gellad, MD, MPH
Career Development Award:  Pitt KL2 / NIDDK K23

 

Research

Dr. Luo’s research focuses on increasing patient access to affordable prescription drugs for patients with chronic diseases, such as diabetes mellitus. His NIDDK K23 Award seeks to determine the effect of cost-related medication restrictions on medication selection and adherence for patients with type 2 diabetes, using both qualitative and quantitative research methods (e.g. Optum). It will also develop a provider-facing educational outreach intervention to help improve evidence-based use of newer glucose lowering medications. Prior to starting his K23, he was supported by Pitt’s Clinical and Translational Science Scholar (KL2) program.

Lakeya McGill, PhD

Division/Institute: General Internal Medicine
Mentors: Jessica Merlin, MD, PhD, MBA / Charles Jonassaint, PhD, MHS
Career Development Award:  NINDS K12

Research
Dr. Lakeya McGill is an assistant professor and a licensed clinical psychologist. Broadly, Dr. McGill’s research focuses on discovering knowledge that promotes equitable pain care for all patients, including adults with sickle cell disease (SCD). Her research program aims to (1) examine the impact of sociocultural, environmental, and psychological factors on chronic pain-related outcomes and disparities, (2) identify protective and risk factors for chronic pain-related outcomes, and (3) develop and implement personalized, culturally appropriate psychosocial and multi-level chronic pain interventions. Dr. McGill is a scholar of the NIH/HEAL National K12 Clinical Pain Career Development Program through the University of Michigan. Her K12 project aims to elucidate the impact of intersecting experiences of discrimination on psychosocial, pain, and treatment outcomes in adults with SCD.

Benjamin Nacev, MD, PhD

Division/Institute: Hematology/Oncology
Mentor: Jeremy Rich, MD (previously C. David Allis)
Career Development Award:  NCI K08

 

Research

The K08-supported research program will determine how a novel class of mutations in histones, the fundamental subunits of chromatin, promote cancer development. Histones control gene expression and differentiation, the process by which cells develop into mature, functional tissue-specific cells and which is disrupted by histone mutations. This research will lead to the development of novel cancer treatments that reverse cancer promotion by mutant histones.

Niranjana Natarajan, PhD

Division/Institute: Vascular Medicine Institute
Mentor: Partha Dutta, DVM, PhD
Career Development Award:  NHLBI K99

 

Research

Heart failure with preserved ejection fraction (HFpEF) accounts for roughly half the cases of heart failure in the United States. HFpEF is a complex syndrome that presents with diastolic dysfunction, and is associated with comorbidities like obesity, hypertension, diabetes and metabolic syndrome. The underlying pathophysiology of HFpEF is not well understood. A key clinical finding in HFpEF is extensive cardiac remodeling and is associated with the systemic inflammation and metabolic syndrome, commonly observed in HFpEF patients. I am interested in the inflammatory signaling pathways that mediate cardiac remodeling, particularly through macrophages and complement signaling mechanisms. My work focuses on understanding the cross-talk between inflammatory signals and cardiac fibroblasts that lead to cardiac remodeling using a systems approach with combination of in vivo and in vitro models.

Andrey Parkhitko, PhD

Division/Institute: Endocrinology/Aging Institute
Mentor: external
Career Development Award:  NIA K99/R00

 

Research
The main area of my research is to contribute to understanding the metabolic mechanisms of aging and age-related diseases. The goal is to understand basic mechanisms of age-dependent metabolic reprogramming and to translate these insights into a mammalian system and ultimately into humans. To achieve this goal, my lab primarily uses Drosophila as a model system because it offers exceptional genetic tools, has a relatively short lifespan, and includes established models for age-dependent diseases. We previously identified new regulators in the methionine metabolism pathway and the tyrosine degradation pathway as important regulators of health- and lifespan. Methionine and tyrosine metabolism pathways can be both targeted with FDA-approved drugs or drugs that are under current investigation for human application. This creates a strong rationale for translating these treatments to mammalian systems as anti-aging interventions or for the potential treatment of various age-related diseases. My lab is currently testing whether targeting methionine or tyrosine metabolism can delay different age-dependent manifestations in aged mice.

Trayambak Pathak

Division/Institute: Vascular Medicine Institute
Mentors: Mohamed Trebak, PhD / Patrick Pagano, PhD
Career Development Award:  NHLBI K99/R00

 

Research

Obesity is a significant factor in the development of various pathologies, such as type 2 diabetes, cardiovascular disease, and cancer. Recent research has demonstrated the crucial role of calcium ion (Ca2+) signals in lipid metabolism and transcriptional reprogramming of cells to support proliferation and development. Orai proteins, specifically Orai1-3, are highly selective channels for Ca2+ and serve as universally present and evolutionarily conserved pathways for regulated Ca2+ influx into all cells. They play a pivotal role in numerous cellular and physiological functions, including the process of lipolysis, proliferation, and development. The primary focus of my work involved investigating the role of Ca2+ entry through Orai channels in various aspects, including metabolism, neuronal development, neuronal activation, and its impact on the regulation of thermogenesis and obesity.

Chethan Puttarajappa, MD

Division/Institute: Renal-Electrolyte
Mentors: Kenneth Smith, MD, MS / Sundaram Hariharan, MD
Career Development Award:  NIDDK K08

 

Research

Dr. Puttarajappa’s research is focused on evaluating the role of virtual HLA crossmatch for deceased donor kidney transplantation(DDKT). Several logistical issues complicate kidney allocation and organ placement, thereby increasing ischemia times and risk of organ discards. Dr. Puttarajappa is investigating the potential benefits of omitting a cell-based (physical) HLA crossmatch and proceeding to transplant surgery with just the result of a virtual HLA crossmatch. He is using a combination of transplant registry analysis, survey methodology and decision analysis to evaluate the impact of virtual HLA crossmatch on cold ischemia time and transplant outcomes, variation in practice across US transplant centers and the risks and benefits of using a virtual crossmatch strategy over a cell-based HLA crossmatch strategy. His other research interests include application of decision and cost-effectiveness analyses to transplantation and evaluating methods to reduce detrimental impact of modifiable post-transplant events such as late-onset CMV infection and immunosuppression non-adherence.

Deirdre Quinn, PhD

Division/Institute: General Internal Medicine
Mentors: Sonya Borrero, MD, MS / Ann-Marie Rosland, MD, MS
Career Development Award:  VA Mentored Research Scientist Development Award

Research
Dr. Quinn is a Core Investigator at the Center for Health Equity Research and Promotion at VA Pittsburgh and an Assistant Professor of Medicine at the University of Pittsburgh. Broadly, Dr. Quinn’s research explores individual-, community-, and system-level influences on sexual and reproductive health. Since joining VA, her work has focused on advancing the quality and equity of reproductive health and healthcare for women Veterans, with the goals of (1) identifying modifiable factors that contribute to disparities in care and outcomes and (2) designing policies, programs, and prevention strategies that promote quality and equity in sexual and reproductive health and healthcare and support reproductive autonomy across the life course.

Her VA HSR&D-funded Career Development Award will use quantitative and qualitative research methods to examine how links between women Veterans’ prepregnancy health risks (e.g., chronic conditions) and healthcare experiences, social characteristics (e.g., race/ethnicity, rurality), and maternal outcomes can inform interventions to improve women Veterans’ healthcare. She is also interested in leveraging system-level strategies, including pharmacist provision of hormonal contraception and 12-month contraceptive dispensing, to improve contraceptive access for Veterans. Outside of work, she enjoys travelling, reading, and cheering for all her hometown DC sports teams! Follow her on Twitter @MsContraception.

Thomas Radomski, MD, MS

Division/Institute: General Internal Medicine
Mentor: Walid Gellad, MD, MPH
Career Development Award:  NIA K23

 

Research

Dr. Radomski is an Assistant Professor of Medicine and Clinical & Translational Science within the Division of General Internal Medicine and Center for Pharmaceutical Policy & Prescribing. He is also affiliated with the Pittsburgh VA Center for Health Equity Research and Promotion as a Research Health Scientist. As a practicing general internist and health services researcher, Dr. Radomski’s research focuses on practical and scalable solutions to accurately measure and reduce the delivery of low-value care and how the receipt of care across multiple healthcare systems influences health service utilization, outcomes, and value. He is supported by a K23 Career Development Award from the National Institute on Aging and is also leading a major VA study to evaluate the use and cost of low-value health services by Veterans in VA and non-VA care settings. His research has been published in journals such as JAMA, the Annals of Internal Medicine, and the Journal of the American Geriatric Society. He also serves as the Director of Academic Programs in Clinical Research for the Institute for Clinical Research Education.

Evan Ray, MD, PhD

Division/Institute: Renal-Electrolyte
Mentor: Tom Kleyman, MD
Career Development Award:  NIDDK K08

 

Research

Our laboratory studies electrolyte balance in the body, including sodium, potassium, magnesium, calcium, and acid/base. We are exploring the influence of these electrolytes on body fluid, blood pressure, bone health and immune function.

Shari Rogal, MD, MPH

Division/Institute: Gastroenterology
Mentor: Kevin Kraemer, MD, MSc
Career Development Award:  NIDA K23

 

Research

Dr. Rogal is a gastroenterologist, transplant hepatologist, and implementation scientist. Her K23 work focuses on using Intervention Mapping to develop a patient-centered approach to pain self-management for people with cirrhosis. She also conducts national, mixed methods implementation work in the VA, developing novel methods for measuring and delivering data-driven combinations of implementation strategies to improve the quality and equity of healthcare. She serves as the co-developer and co-Director of the Pitt Dissemination and Implementation Science Collaborative (DISC), co-Director of the VA Implementation Core of the Center for Health Equity Research and Promotion and the Pitt CTSI’s IMPACT and Implementation Lab cores.

Anita Saraf, MD, PhD

Division/Institute: Cardiology
Mentors: Toren Finkel MD, PhD and Bernhard Kuhn, MD
Career Development Award:  AHA / NHLBI K08
Research
My clinical and research interests are in congenital heart disease (CHD). While new surgical interventions have dramatically extended the lives of children with congenital heart disease, adults with CHD can have a higher burden of arrhythmia and heart failure, causing morbidity and mortality. These long-term consequences are even more evident in patients with complex congenital heart disease such as patients with univentricular physiology or Fontan circulation. My previous studies have shown that patients with Fontan circulation have a chronic proinflammatory profile that may be increasing the burden of arrhythmia and heart failure. While it is well accepted that genetic mutations drive CHD pathology, it is becoming more evident that these mutations are complex and involve multiple environmental factors. The impact of these mutations in a post-developmental heart is unknown. My research investigates the interaction between inflammation and genetic mutations associated with CHD in causing arrhythmias and heart failure. My laboratory uses induced pluripotent stem cells (iPSCs) in combination with CRISPR/Cas9 to generate cell lines with unique complex mutations in NOTCH1, a transmembrane receptor implicated in numerous types of CHD. Using patient derived iPSCs with NOTCH1 mutations in combination with genetically engineered iPSCs, I am interested in identifying external factors such as inflammation, that can increase the propensity of arrhythmogenic calcium transients and decreased contractility. My long term goal is to identify novel drugs and therapies that can mitigate such detrimental physiologic sequalae.

Leslie Scheunemann, MD, MPH

Division/Institute: Geriatric Medicine
Mentors: Natalie Leland, PhD / Chip Reynolds, MD
Career Development Award:  AHRQ K08

 

Research

An Assistant Professor with dual training in geriatrics and pulmonary/critical care medicine, Dr. Scheunemann has an AHRQ-funded K08 to develop and pilot test a stakeholder-driven, telehealth-delivered transitional care intervention for rural-dwelling critical illness survivors and their family caregivers. She will use implementation science methods to adapt successful interventions from other fields to the post-ICU context, focusing on transitional care, family support and training, and rehabilitation. The goal of this research is to optimize quality, affordability, and access to care for vulnerable populations of critical illness survivors.

Craig Seaman, MD, MS

Division/Institute: Hematology/Oncology
Mentor: Margaret Ragni, MD, MPH
Career Development Award:  NHLBI K23

 

Research

My research focuses on the role of aging and aging-related conditions in hereditary bleeding disorders, specifically von Willebrand disease and hemophilia. My K23 award explores the effect of aging on von Willebrand factor levels and bleeding phenotype in von Willebrand disease.

Faraaz Shah, MD, MPH

Division/Institute: Pulmonary, Allergy and CCM
Mentors: Christopher O’Donnell, PhD / Bryan McVerry, MD
Career Development Award:  NIGMS K23

 

Research
Faraaz Shah is a translational physician-scientist in the Division of Pulmonary, Allergy, and Critical Care Medicine. His primary research interests are in understanding mechanisms underlying sepsis pathogenesis with the goal of improving recovery from critical illness. During his K23, he conducted a bench-to-bedside investigation the effects of early nutrition support on inflammation and glycemic control in the acute phase of sepsis through preclinical sepsis studies and a pilot single center clinical trial (the Study of Early Enteral Dextrose in Sepsis [SEEDS], Clinical Trials registration number: NCT03454087) which recently completed enrollment. He is a co-investigator on a recently awarded NIH-funded study applying precision medicine approaches for the administration of glucocorticoids in sepsis. He has served as the principal investigator for two COVID-19 clinical trials at the VA Pittsburgh Healthcare System where he attends on clinical service.

Dan Shiwarski, PhD

Division/Institute: Vascular Medicine Institute
Mentors: Adam Feinberg, PhD (CMU) (K99)
Career Development Award:  NHLBI K99/R00

Research
The Shiwarski Tissue Engineer Laboratory is interested in how high blood pressure alters the structure and function of small diameter blood vessels. By integrating advanced 3D bioprinting, regenerative medicine, and microfluidics we develop novel experimental platforms to investigate relationships between engineered 3D tissue structure, extracellular matrix composition, biomechanical forces, and altered receptor signaling that drives vascular tissue maturation and hypertensive disease pathology.

Bryant Shuey, MD, MPH

Division/Institute: General Internal Medicine
Mentors: Jane Liebschutz, MD, MPH / Katie Suda, PharmD, MS
Career Development Award:  NIDA K12

Research
Bryant Shuey’s research focuses on access to care for people with substance use disorders. His work analyzes large datasets, including nationally representative survey data and health insurance claims data.

Tomeka Suber, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentor: Janet Lee, MD
Career Development Award:  NHLBI K08

 

Research

Dr. Suber is a physician-scientist in pulmonary and critical care medicine at the University of Pittsburgh. After graduating from the combined MD/PhD program at Johns Hopkins University School of Medicine in Cellular and Molecular Medicine, she completed residency training in internal medicine at Johns Hopkins Hospital. She moved to the University of Pittsburgh to complete fellowship training in pulmonary and critical care medicine and was appointed as Assistant Professor in the Division of Pulmonary, Allergy, and Critical Care Medicine in 2019. During her postdoctoral training, she studied proteasomal regulation of lung epithelial injury and repair. Currently, her research program focuses on 1) understanding metabolic regulation of pulmonary host defense mechanisms in models of bacterial pneumonia; 2) identifying metabolomic signatures in acute lung injury to elucidate pathogenic mechanisms in critically ill patients; and 3) understanding how oxidized phospholipids mediate epithelial injury during vaping-induced lung injury. She is supported by the Clinical and Translational Science Scholars Program (KL2) and also funded by the Robert Wood Johnson Foundation.

Wei Sun, MD

Division/Institute: Cardiology/Vascular Medicine Institute
Mentors: Stephen Chan, MD, PhD
Career Development Award:  AHA CDA; NHLBI K08

Research
My research interest has focused on the functional genomics analysis of single nucleotide polymorphisms (SNPs) in complex cardiovascular diseases, including pulmonary arterial hypertension (PAH). I aim to elucidate the molecular mechanism underlying the emerging genetic features of complex diseases, utilizing a newly developed platform/pipeline to screen the functionality of single nucleotide variants that are mostly localized in non-coding regions of the genome and have been associated with the development of the diseases by Genome-wide Association Studies (GWAS). This post-GWAS analysis will allow me to identify functional SNPs and the DNA-protein complexes that they bind. As an example, a new pathogenic regulator FUBP1, which binds to an intragenic functional SNP rs4738801, was identified to regulate the expression of target gene SOX17, a critical cell survival gene previously associated with PAH by GWAS. The reduced binding of FUBP1 to risk allele C of the functional SNP rs4738801 defines the genomic architecture contributing to the SOX17-dependent genetic susceptibility of PAH. On the other hand, the downregulation of FUBP1-SOX17 by the acquired PAH trigger hypoxia, results in endothelial dysfunction, contributing to the acquired pathogenesis of PAH. My findings identify a novel role of FUBP1 in the functional regulation of the SOX17 locus and elucidating a pathogenic mechanism that combines the acquired PAH-triggering factors and altered genetic susceptibility. I will continue to apply this functional genomics approach to the basic and translational research in the discovery, development, and clinical application of new diagnostic and therapeutic approaches in cardiovascular diseases, especially pulmonary arterial hypertension.

Jay Tan, PhD

Division/Institute: Aging Institute
Mentors: Toren Finkel, MD, PhD; Stacey J. Sukoff Rizzo, PhD; Ana Maria Cuervo, MD, PhD
Career Development Award:  NIA K01

 

Research

Dr. Tan studies core principles of cell biology in aging, with particular interest in basic molecular mechanisms underlying cellular homeostasis and stress response. Organelle stress and damages are common risk factors in aging and diseases. A major goal of our lab is elucidating the molecular mechanisms underlying the sensing, repairing, and clearance of damaged organelles in mammalian cells. We search for essential, unifying principles behind complex stress responses through unbiased approaches, and dissect underlying mechanisms with multidisciplinary methods including molecular biology, biochemistry, cell biology, and genetics. Current research topics include lysosomal quality control in aging and neurodegeneration, inter-organelle communications in cell homeostasis, and lysosomal stress in innate immunity and age-related inflammation. For more information: jaytanlab.org

Holly Thomas, MD, MS

Division/Institute: General Internal Medicine
Mentors: Rebecca Thurston, PhD / Sonya Borrero, MD, MS
Career Development Award:  NIA K23

 

Research

Dr. Thomas seeks to conduct innovative, interdisciplinary, patient-centered clinical research that will improve the health and quality of life of women as they age. In particular, she is interested in understanding the physical and psychosocial factors that contribute to sexual dysfunction in midlife and older women and using this understanding to develop behavioral treatment options for this population.

Jeremy Tilstra, MD, PhD

Division/Institute: Rheumatology
Mentor: Mark Shlomchik, MD, PhD
Career Development Award:  NIAMS K08

 

Research
Dr. Tilstra is focusing on disease pathogenesis in lupus nephritis. He is exploring this phenomenon through several different veins of research. His initial studies examined the roll of Toll Like Receptor signaling on disease, first he focused on the cell-specific role of TLR9, and this was followed by examining the dynamic role of TLR signaling throughout the disease course. The other major focus of Dr. Tilstra’s work is evaluating the changes that occur between kidney tissue and inflammatory cells in lupus nephritis. In this work, he is exploring how both the infiltrating immune cells, specifically T cells, change after migrating from the periphery into the target organ, as well as how the target organ may alter infiltrating cell function after tissue invasion. The initial work on this research uncovered a novel finding that kidney-infiltrating T cells were not activated effector cells but in fact had an exhausted or suppressed phenotype. Further efforts on this work aim to uncover new therapeutic approaches for treating lupus nephritis and other systemic autoimmune diseases.

Giraldina Trevejo-Nunez, MD

Division/Institute: Infectious Diseases
Mentor: Sarah Gaffen, PhD
Career Development Award:  NHLBI K01

 

Research

 I am interested in the host-pathogen interaction during pneumonia. I use murine models of pneumonia with pathogens such as Klebsiella and Streptococcus pneumoniae. My first interest is the contribution of IL-22/IL-22R1 signaling in the lung epithelium to control infectious processes. A second interest is in the negative regulation of inflammation during pneumonia through the RNA binding protein Regnase-1. For that we are analyzing the effects of Regnase-1 deficiency in different lung populations during pneumonia.

Eleanor Valenzi, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentors: Robert Lafyatis, MD
Career Development Award:  NHLBI K08
Research
Dr. Valenzi’s translational research program focuses on determining the molecular mechanisms and transcription factor dysregulation underlying systemic sclerosis and other chronic fibrotic lung diseases. She is particularly focused on myofibroblast differentiation in systemic sclerosis-associated interstitial lung disease. Her research utilizes single-cell based technologies, genomic, and explant culture models of primary tissue to obviate the limitations of murine models of fibrotic lung disease. She is also actively involved in the design and execution of clinical trials in SSc-ILD. Her work ultimately aims to identify and develop new therapeutics for systemic sclerosis and other fibrotic lung diseases.

Julia Woodcock, PhD

Division/Institute: Vascular Medicine Institute
Mentor: Stephen Chan, MD, PhD (K99)
Career Development Award:  NHLBI K99/R00
Research
Dr. Woodcock’s research interest is in understanding how RNA editing affects gene regulation linked to pulmonary endothelial functions and physiology, specifically in the context of pulmonary arterial hypertension (PAH) pathogenesis. Adenosine deaminase acting on RNA 1 (ADAR1) is a double-stranded RNA editing enzyme that converts adenosine to inosine (A-to-I) in genome-encoded RNA transcripts, which plays a vital role in RNA metabolism and cardiac function. Her current research explores how deficiency in ADAR1-mediated RNA editing induces PA endothelial cell innate immunity and death, as well as contributes to vascular remodeling and PAH pathogenesis. Elucidation of this will advance our understanding of PH development and ultimately lead to novel strategies for developing effective therapeutics to treat PAH.

Haodi Wu, PhD

Division/Institute: Cardiology/Vascular Medicine Institute
Mentor: external
Career Development Award:  NHLBI K99/R00

 

Research

My main research interests are to understand the molecular mechanisms underlying the development, disease, and senescence of heart cells, and to develop potential therapeutic strategies to rectify pathogenesis and aging in the heart. We utilize human induced pluripotent stem cell (iPSCs) platform and cutting-edge molecular, cellular, and physiological technologies to study the biology of heart cells in health and diseases, and to discover novel drugs and approaches for translational applications.

Julia Z Xu, MD, MScGH

Division/Institute: Hem/Onc / Vascular Medicine Institute
Mentors: Enrico Novelli, MD, MS / Adam Straub, PhD
Career Development Award:  NCATS KL2

Research

Dr. Xu’s research focuses on improving anemia and related complications in sickle cell disease (SCD). Anemia is a hallmark manifestation of SCD and also plays a key role in driving SCD-related multi-organ damage. Dr. Xu’s research aims to better understand different etiologies of anemia in SCD, as well as evaluate the hemorheological impact of raising hemoglobin level with different therapies for SCD using innovative biomarkers and non-invasive imaging tools. This research will inform the development of optimal treatment strategies for chronic anemia in SCD.

Joo Yoon, MD

Division/Institute: Pulmonary, Allergy and CCM
Mentors: Gilles Clermont, MD, MSc / Michael Pinsky, MD
Career Development Award:  NIGMS K23

 

Research
Dr. Yoon is a physician scientist, and an Assistant Professor of Medicine in the Division of Pulmonary, Allergy, and Critical Care Medicine. His research has been focused on developing machine learning (ML)-based complex prediction modeling on critically-ill patients in the intensive care unit (ICU). With a large ICU multigranular database, Dr. Yoon currently works on artificial intelligence (AI)-driven prediction of hemorrhage, shock, and development of resuscitation optimization algorithms, which can guide physician’s decision making strategy at bedside, or out-of-hospital setting. Under the K mentorship, he also plans to create an ecosystem for machine learning researchers in healthcare by contributing to develop data standardization and novel multicenter modeling process. From Jan 2021, Dr. Yoon has been serving as a NIH cardiovascular study section member for small business innovation research (SBIR) / small technology transfer research (STTR), to facilitate AI/ML device development and commercialization in healthcare.

Manling Zhang, MD, MS

Division/Institute: Cardiology/Vascular Medicine Institute
Mentors: Iain Scott, PhD / Toren Finkel, MD, PhD
Career Development Award:  NHLBI K08

 

Research

Dr. Zhang is currently studying the mechanism of GCN5L1, a mitochondrial acetyltransferase, in enhancing cardiac bioenergetics through retrograde activation of PGC-1α signaling in response to hemodynamic stress or exercise using cardiac specific GCN5L1 deficient mice.   As a cardiologist subspecializing in advanced heart failure and transplantation, and as a basic scientist studying cardiomyocyte biology, Dr. Zhang’s long-term career goal is to become a physician scientist,  focusing on reciprocal regulation of cardiac epigenetics and metabolism regulation in heart failure and exercise to discover a more effective treatment for heart failure.