Kumar Lab

Kumar Lab

Understanding Intracellular Stress Response in the Ocular and Neurological Diseases

We are an interdisciplinary group in Ophthalmology and Pharmacological Sciences at Icahn School of Medicine at Mount Sinai, New York. Our mission is to understand the contribution of the intracellular stress response, specifically Endoplasmic reticulum (ER) and mitochondrial stress and their crosstalk dysregulated in many neurological and ocular diseases. Our research model is corneal endothelium cells that undergo various intracellular stress, ultimately leading to apoptosis in Fuchs Endothelium Corneal Dystrophy (FECD). We use cutting-edge cellular and molecular biological techniques, genetics and pharmacological tools, single-cell genomics, RNA seq, large datasets, etc.

Funding:

National Institute of Health / National Eye Institute

New York Eye and Ear Foundation

Sarah K. de Coizart Perpetual Charitable Trust

 

Awards:

American Heart Association Postdoctoral Fellowship (2018)

K99/ R00 (NIH/NEI) Pathway to Independence Award (2020)

ARVO Travel Grant (2020)

Santel, Inc./ ARVO Travel Award (2021)

New York Eye and Ear Foundation Award (2022)

Sarah K. de Coizart Perpetual Charitable Trust Award(2023)

Team

Principal Investigator/ Assistant Professor
Varun Kumar, PhD
varun.kumar@mssm.edu

I am trained as a biomedical research scientist in the field of neuroscience and ophthalmology. My doctoral research involved the pathogenesis of ischemia-induced neurodegeneration with respect to mitochondria. My doctoral studies suggested that (1) Deletion of PKC epsilon reduces neurodegeneration after global cerebral ischemia. (2) This neurodegeneration is regulated by a transcription factor (ATF2, Activation Transcription Factor 2) (3) ATF2 translocate to mitochondria and its translocation is regulated via its phosphorylation by PKC epsilon. (4) Another PKC isozyme analogous to PKC epsilon is PKC delta, which contributes to ischemia induced neurodegeneration in our study. During my postdoctoral studies under Drs. Jeffrey L. Goldberg, Yaping Joyce Liao, Ula V Jurkunas and as Instructor, I investigated the role of endoplasmic reticulum, mitochondria and oxidative stress in diseases such as ischemic optic neuropathy, diabetes retinopathy and Fuchs endothelial corneal dystrophy (FECD). My postdoctoral studies suggested that (1) Retinal ganglion cells and oligodendrocytes are selectively vulnerable to ER stress in ischemic optic neuropathy. (2) Imbalance of oxidant-antioxidant system (Loss of NQO1) causes corneal endothelial cell loss in FECD. (3) There is a loss of mitochondrial quality control in FECD which is governed by mitophagy. We are currently investigating the interaction of one stress (ER stress) with another (oxidative or mitochondria stress), which will open new avenues for the drug discovery. At Mount Sinai, I will continue my research involving ER-mitochondrial crosstalk in FECD.

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Medical Student
Lukas Ritzer
Lukas.Ritzer@icahn.mssm.edu

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Medical Student
William Steidl
William.Steidl@icahn.mssm.edu

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Medical Student
Anisha kashi
anisha.kasi@icahn.mssm.edu

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Postdoctoral Research Fellow
Saba Qureshi
saba.qureshi@mssm.edu

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Research Assistant
Stephanie Lee
stephanie.lee.1197@gmail.com

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Research Assistant
Rayson Santiago
raysonsantiago@gmail.com

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High School Student
Ananya Chaubal
anchau24@herricksk12.org

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High School Student
Arham Akhyer
akhyera@bxscience.edu

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High School Student
Jannet Pawar
pawarj1@bxscience.edu

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Undergraduate student (Stony Brook)
Hua Huang
hhuang31@stuy.edu

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Undergraduate student (Ladders for Leaders Summer Intern, NYC)
Andrew Chen
chenandrew2004@gmail.com

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Undergraduate student (Columbia University, New York City)
Gayle Joliet Krest
gjk2131@columbia.edu

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Lab Updates

January 2022

I started my career as an Assistant Professor (Ophthalmology and Pharmacological Sciences) at Icahn School of Medicine at Mount Sinai, New York.

March 2022

We are opening doors for prospective undergraduate, graduate, and medical students, research assistants, PhD, and postdoctoral fellows to join our lab.

April 2022

Medical Students Lukas Ritzer, William Steidl, and Michael Parise joined the lab to help in research activities.

May 2022

Saba Qureshi joined as a postdoctoral fellow in the lab. Welcome Saba.

June 2022

High School students Ananya Chaubal, Arham Akhyer, and Jannet Pawar joined the lab for the summer of 2022.

June 2022

Stephanie Lee joined as a research assistant in the lab. Welcome Stephanie.

September 2022

Michael Parise joined the residency program at Kettering Health, Ohio. Congratulations Michael.

December 2022

We received a New York Eye and Ear Foundation Grant.

April 2023

We received a Sarah K. de Coizart Perpetual Charitable Trust/ Foundation grant.

May 2023

We welcome high school students Ananya Chaubal, Arham Akhyer, and Jannet Pawar to rejoin the lab for summer 2023.

June 2023

We welcome Hua Huang and Andrew Chen to join the lab as summer undergraduates.

October 2023

Our paper has been accepted in IOVS. Congratulations to all the lab members. Special thanks to Saba, Stephanie, and William for all their efforts.

Lab Alumni

Name                                      Year                                 Position

Michael Parise                      2022-2023                        Resident Physician at Kettering, Ohio 

Lab Fun

2023

2022