


Stephen Addo

Tamasi Roy


Amritha Sreekumar

2026
The recipient of the Tapan Chatterjee Memorial Award is Tamasi Roy in recognition of research excellence at the 41st Annual Graduate Research
Day.
(photo) Tamasi Roy
Research focus: Portal hypertension is a major clinical complication of chronic liver disease and a key driver of morbidity and mortality worldwide. It develops when resistance to blood flow increases within the portal venous system due to structural and hemodynamic alterations in the liver and splanchnic circulation. Our research focuses on understanding how structural and cellular changes in the portal vein contribute to the development and progression of portal hypertension. Through this work, we hope to uncover novel mechanisms underlying portal hypertension and identify potential therapeutic targets that may help reduce portal pressure and improve patient outcomes.
Stephen and Dr. Tzung Hsiai, a professor at UCLA School of Engineering, enjoying a break at NAVBO Vascular Biology 2025 held at Cape Cod, MA | October 19-23

Dr. Tzung Hsiai, Professor, UCLA School of Engineering, with 2nd year PhD student Stephen Addo.
Huiping Lin (graduate student, 2015-2020)
Grant support: AHA 18PRE34080052
Graduated with distinction.
Current position: Professor, Guangzhou Medical University
WonMo Ahn (graduate student, 2020-2024)
Grant support: F31 HL162498-01A1
Graduated with distinction.
Current position: Postdoctoral fellow, Oregon Health & Science University
Bhupesh Singla, PhD (postdoctoral fellow, 2015-2021)
Grant support: AHA 17POST33661254,
NIH K99 HL146954
Current position: Assistant Professor, The University of Tennessee Health Science
Center
Pushpankur Ghoshal, PhD (Senior Research Associate, 2015-2023)
Current position: Public Health Laboratory Scientist General Lead (Maryland Cannabis
Administration)
Kamila Wojnar-Lasoń, PhD (Postdoctoral fellow, 2024-2025)