Technique and Technology: Semi-automated Optical Heartbeat Analysis (SOHA)

After a successful teaching career at the University of Michigan I have had the privilege to “reboot” my research career at Sanford Burnham Prebys where I have had the opportunity to develop novel methodologies to understand cardiomyopathy. I have also had the opportunity to work with NASA scientists to do experiments on the International Space Station.

Education

Postdoctoral Fellow, Stanford University, Palo Alto, CA, Neurochemistry
Postdoctoral Fellow, University of Texas Medical School, Houston, TX, Neuroscience NIMH
PhD, Wesleyan University, Middletown, CT, Neuroscience NIMH
B.A., Lehigh University, Bethlehem, PA, Biology

Prestigious Runding Awards or Major Collaborative Grants

2015-2020: NIH R01 HL132241-01A1 – Using Drosophila genetics to identify molecular links between ion channel dysfunction and pathological cardiac remodeling. (PI) 2013-2018 NASA NRA #NNH12ZTT001N – The effects of microgravity on cardiac function, structure and gene expression using the Drosophila model. (Co-I)

Honor and Awards

2014: Space Florida International Space Station Research Competition Winner – Co-investigator – One of three Basic Research proposals selected for launch aboard SpaceX3 – Mission completed, live flies returned on May 18,2014
2001: Excellence in Teaching Award, University of Michigan
1997: Excellence in Teaching Award, University of Michigan
1986-1988: National Institute of Mental Health Fellowship
1983-1985: National Institute of Mental Health Fellowship
1981: Sigma Xi Research Award 1980 MBL Scholarship, Neural Systems and Behavior Course
1971-1975: National Merit Scholarship, Lehigh University

Board Appointments

2018-present: Board member American Society for Gravitational and Space Research

Related Disease
Aging, Aging-Related Diseases, Atrial Fibrillation, Cardiac Fibrosis, Cardiomyopathies, Heart Disease, Metabolic Syndrome, Molecular Biology

Phenomena or Processes
Actin Cytoskeleton, Calcium Signaling, Cardiovascular Biology, Cell Signaling, Extracellular Matrix, Fuel Metabolism, Integrins, Metabolic Networks, Phosphorylation, Stress Response Pathways

Anatomical Systems and Sites
Cardiovascular System, Heart

Research Models
Drosophila, Larval Zebrafish Heart, Zebrafish

Techniques and Technologies
Biophysiology, Cellular and Molecular Imaging, Fluorescence Microscopy, Gene Silencing, Genetics, In vivo Modeling, Ion Channels, Live Imaging, Microarrays, Microscopy and Imaging, Molecular Genetics, RNA Interference (RNAi), Semi-automated Optical Heartbeat Analysis (SOHA), Systems Biology, Transgenic Organisms

The Ocorr Lab is investigating the cellular and molecular basis of adult heart function and cardiomyopathies using the genetic model system Drosophila.

We use functional, electrophysiological, biochemical and immunohistochemical techniques that allow us to examine the roles of genes and gene products in cardiac channelopathies and stress-related cardiomyopathies.

Our lab pioneered the development of a novel methodology (Semi-automatic Optical Heartbeat Analysis, SOHA) that permits the quantification of heartbeat parameters in model systems with small hearts.

Using this system we have identified several ion channels in the fly heart that play prominent roles in repolarization of the human heart and cause arrhythmia in both the fly and in humans when mutated. We also have developed a number of other disease models including a diabetic-like cardiomyopathy induced by high sugar diet and hypoxia-induced cardiomyopathy.

Recently we have begun collaborations with NASA (by winning a Space Florida International Space Station Research Competition). We are using the fly to uncover the molecular/cellular basis for cardiac and muscle atrophy in astronauts exposed to extended periods of microgravity despite extensive exercise regimes aboard the ISS. Our flies were launched aboard SpaceX 3 for a month-long exposure to micro-gravity.

Karen Ocorr’s Research Report

My lab is working to understand the cellular and molecular basis of heart disease. One project is focused on the genetic basis of Atrial Fibrillation. This project is a collaborative one with the lab of Alexandre Colas. We are combining two model systems, the fly in my lab and human induced cardiomyocytes in his lab, to identify AFib genes that have been implicated from patient studies. Another project focuses on the role of metabolism in cardiomyopathies. This is because obesity and metabolic syndrome are linked to an increased risk of heart disease. We are studying the role of a key metabolic signaling molecule in hypertrophic cardiomyopathy. A separate effort is focused on the role of gravity in heart function. These studies will provide important information for future habitants of colonies on the moon and Mars. But they are also relevant to patients who are bedridden and to patients with muscle wasting (sarcopenia).

Click to Play Video