Lab

Subramaniam Pennathur, M.D.

Nephrology Division Chief
Norman Radin Nephrology Professorship
Director, O’Brien Kidney Translational Research Center
Professor, Department of Medicine and Molecular and Integrative Physiology
Computational Medicine and Bioinformatics Affiliate Faculty

spennath@umich.edu

The central theme of our research has focused on the applications of biological mass spectrometry in disease pathogenesis.

A major focus of the lab has been to define the role of oxidative stress on disease pathogenesis and complications, including diabetic complications, chronic kidney disease, autoimmune disease and cardiovascular disease. We have utilized mass spectrometry to identify key protein and metabolite alterations in disease states and tested the hypothesis whether these alterations predict complications in animal models and humans. Our strategy has been to develop analytical techniques in animal models and validate these markers in humans and then interrogating the animal model for biological pathway relevance. Recent extensions of this work have included targeted as well as untargetted metabolomic and proteomic profiling.

Dr. Pennathur completed his clinical training in Internal Medicine, Endocrinology and Nephrology at Washington University, Saint Louis, where he served as Chief Resident. He then completed research fellowships at Massachusetts General Hospital in Boston, Washington University in Saint Louis, and the University of Washington, Seattle.

Dr. Pennathur serves as the Director of the Molecular Phenotyping and Metabolomics Core, and the Physician Scientist Program in the Department of Medicine. His laboratory’s research is funded by the National Institutes of Health, and foundations including the Juvenile Diabetes Research Foundation.

LAB MEMBERS

Farsad Afshinnia M.D., M.S.

Assistant Professor, Department of Internal Medicine-Nephrology

fafshin@med.umich.edu | PubMed Listing

Dr. Afshinnia entered medical school in 1988 and graduated with a medical degree in 1995 from Isfahan University of Medical Sciences in Iran. He became interested in epidemiology and clinical research at an early stage of career, taught introductory research design and data analysis at the Isfahan University of Medical Sciences and practiced medicine part time in the inpatient and outpatient setting.

He immigrated to the United States in 2000 and joined the Internal Medicine residency program at the Brookdale University Hospital and Medical Center in Brooklyn, New York from 2002 to 2005. After graduation from residency, he practiced internal medicine as a hospitalist until July 2010. He enrolled in the Masters of Science clinical research training program at the University of Minnesota in 2007 and graduated in 2010, while working as a hospitalist. He was then recruited as a Nephrology Fellow to the University of Michigan in July 2010 and was appointed as a Clinical Lecturer in the Division of Nephrology effective July 1, 2012.

Farsad’s research interest include identifying risk factors, developing strategies for early disease detection, risk factor modification and examining their impact on outcomes in chronic kidney disease. Therefore he joined Dr. Pennathur’s lab in 2013, with research efforts aimed at identification and validation of prognostic metabolites capable of predicting progression of chronic kidney disease to end stage kidney disease at earlier stages of disease using targeted and untargeted metabolomic platforms in established cohorts of patients with kidney disease. To that end the impact of novel biomarkers in risk stratification and early diagnosis, besides their impact on renal and cardiovascular outcomes beyond currently used traditional biomarkers are under investigation.

Manikanta Swamy Arnipalli, Ph.D.

Research Fellow, Department of Internal Medicine-Nephrology

manikana@umich.edu

Manikanta received his Ph.D. in Analytical Chemistry from Indian Institute of Chemical Technology (CSIR-IICT) and Osmania University in 2021. During his doctoral research, he developed and validated bioanalytical methods for active pharmaceutical ingredients using HPLC and LC-MS/MS.  He further developed and validated Chiral LC-MS/MS methods for the separation of enantiomers. After graduating, he started working at the Pennathur lab. His main research focuses on the development of complementary metabolomic techniques based on mass spectrometry for the study of diabetic kidney disease.

Judy Baek

MD/PhD candidate

judybaek@umich.edu

Judy Baek received her BS in biology and chemistry from MIT in 2013. Currently, she is pursing her MD and PhD as a fellow of the Medical Scientist Training Program at University of Michigan.

Jaeman Byun, Ph.D.

Associate Research Scientist

jaemanb@umich.edu

Jaeman Byun was born in Seoul, South Korea and received his Ph. D. under the training of Dr. Gross at Washington University, St. Louis, US. He then expanded his research efforts to clinical studies with state-of-art bioanalytical mass spectrometric tools during a post-doctoral fellowship with Jay Heinecke, MD, Washington University. Since joining Dr. Pennathur’s lab, he is involved in a number of original and creative ideas and approaches that have the potential to make a tremendous impact in clinical investigation and health care. His work has focused on the applications of biological mass spectrometry in disease pathogenesis with emphasis on oxidative mechanisms and biological mass spectrometry. He has actively participated in several studies focused on oxidative stress, proteomics, metabolomics and biomarker discovery in diabetic complications, chronic kidney disease, and cancer. His work enables early discovery of complications and develop novel therapeutic strategies.

Chenchen He, Ph.D.

Research Fellow, Department of Internal Medicine-Nephrology

chenhhe@med.umich.edu

Chenchen received her Ph.D. in Analytical Chemistry from Wayne State University in 2018, and her focus was on the characterization of biomolecules using tandem mass spectrometry. She joined the Pennathur lab immediately after graduation. Since joining the lab, she has worked on the development of LC-MS based quantitative analysis for lipidomic and metabolomic platforms in cross-species systems in order to identify key lipogenic and metabolomics pathways in diabetic kidney disease. Chenchen was accepted into the NIH Postdoctoral Multidisciplinary Training Program in Basic Diabetes Research (T32 Training Grant) at the University of Michigan in 2019.

Pradeep Kayampilly, Ph.D.

Research Laboratory Specialist, Department of Internal Medicine-Nephrology

prapeepk@med.umich.edu

Pradeep received his Ph.D in 1998 from the Maharaja Sayajirao University of Baroda, India. He started his post-doctoral fellowship in University of Michigan at the Obstetrics & Gynecology and Biochemistry departments in 2000. During the post-doctoral fellowship he studied the growth characteristics of ovarian cells under hyper-androgenic conditions with special emphasis on cell signaling. He joined Dr. Pennathur’s laboratory in 2012 and his research is focused on the altered metabolite utilization using metabolic flux analysis, post-translational modification of enzymes and mitochondrial dysfunction under diabetic conditions.

Anna Mathew, M.D.

Assistant Professor, Department of Internal Medicine-Nephrology

amat@med.umich.edu

Anna is a junior faculty member in the Division of Nephrology. Her initial research efforts during her training as a nephrology fellow focused on translational research in diabetic and obesity related renal disease under the mentorship of Dr. Kumar Sharma, University of California San Diego. In her current position she applies the principles of mass spectrometry in unraveling metabolic profiles of renal disease. She has spent the last 3 years in Dr. Pennathur’s lab understanding sample preparation, chromatography and mass spectrometry techniques. Her work has resulted in discovery of metabolic markers in diabetic kidney disease and cardiovascular complications in kidney disease that are being validated with larger cohorts and by mechanistic studies. Her time is spread between her research, clinical duties, two loving children and a very supportive husband.

Lixia Zeng, Ph.D.

Research Laboratory Specialist, Department of Internal Medicine-Nephrology

lixiaze@med.umich.edu


Nancy Roeser

Lab Manager, Research Laboratory Specialist, Department of Internal Medicine-Nephrology

nroeser@med.umich.edu | PubMed Listing