Mechanical Force Induces Endothelial Cell Reprograming and Atherosclerosis

Hanjoong Jo, Ph.D.

Coulter Distinguished Chair Professor

Associate Chair for Emory Biomedical Engineering

Coulter Department of Biomedical Engineering, Emory University and Georgia Tech


Seminar Information

Seminar Date
April 15, 2022 - 2:00 PM

Location
PFBH FUNG Auditorium and via Zoom

Hanjoong Jo, Ph.D.

Abstract

Atherosclerosis is the major underlying cause of myocardial infarction and stroke. It occurs preferentially in arterial regions exposed to disturbed flow (d-flow) by mechanisms involving broad changes in the expression of coding and non-coding genes. Using the partial carotid ligation model of atherosclerosis in mice and gene array and "bulk" RNA sequencing studies, we revealed the roles of flow-sensitive genes and microRNAs in endothelial dysfunction and atherosclerosis. Furthermore, these results showed that targeting mechanosensitive genes and "athero-miRs" provide a new treatment paradigm in atherosclerosis. Recently, we carried out single-cell RNAseq and ATACseq studies using the partial carotid ligation model of atherosclerosis. The single-cell study results and additional validation studies revealed that d-flow reprograms endothelial cells to proatherogenic phenotypes, including EndMT and endothelial-to-immune cell-like transition. I will discuss the implications of these results in atherosclerosis.

Speaker Bio

Dr. Hanjoong Jo is Wallace Coulter Distinguished Chair Professor and Associate Chair in Wallace Coulter Department of Biomedical Engineering (BME) at Emory University and Georgia Tech and Professor of Medicine at Emory University. He directs the Cardiovascular Mechanobiology, Therapeutics, and Nanomedicine Lab. His lab studies the mechanisms by which mechanical force of blood flow regulates vascular endothelial function, which leads to atherosclerosis and aortic valve disease. Based on the mechanobiological studies, his lab develops novel therapeutics by targeting flow-sensitive genes and nanotechnology to treat cardiovascular disease safely and effectively. He has published >200 peer-reviewed papers and written three books as editor. He is an elected fellow of the American Association for Advancement of Science, the Biomedical Engineering Society, American Institute of Medical and Biological Engineering, American Heart Association, and American Physiological Society. He received the Bernard and Joan Marshall Distinguished Investigator Award from the British Society Cardiovascular Research. He serves as Associate Editors of Atherosclerosis Journal, Frontiers in Cardiovascular Physiology, and Cardiovascular Engineering and Technology (CVET), and editorial board members of several leading journals.

EDUCATION:

            B.S., Korea University, Seoul, South Korea, 1984                           

            Ph.D., Pennsylvania State University, 1989

            Postdoctoral fellow, Washington University, 1989-1990

Postdoctoral fellow, The University of Alabama at Birmingham 1990-1992

EMPLOYMENT:

            1995-2000       Assistant Professor, Pathology and BME (Secondary), UAB

            2000-2006       Associate Professor, Dept of BME and Dept of Medicine, Emory & Georgia Tech

            2006-present   Professor, Dept of BME and Dept of Medicine, Emory University & Georgia Tech