Our laboratory is focused on the study of intercellular
communication through gap junctions; a group of intercellular
channels formed after the oligomerization proteins named
connexins.
These channels participate in the regulation of
electrical communication in the heart, where appropriate
temporal and spatial expression are decisive for the
physiological well function of the heart.
The main efforts in our laboratory are several fold:
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Characterize the permeability and gating properties of
multi-oligomeric cardiac gap junction channels.
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Determine the biophysical and biochemical mechanisms
necessary to reconnect electrically uncoupled cells from
cardiac-damaged tissue.
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Determine the mechanisms of gating of cardiac connexins due
to phosphorylation and pH.
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Determine the effects of geometric and coupling effects on
hetero-cellular communication in cardiac tissue.
We possess a strong background in cellular electrophysiologic
techniques and cellular membrane physiology. Senior technician
Chris Hunter expertly instructs cells to over-express wild type
or mutant connexins of interest through genetic engineering
(cellular transfections or transgenic mice). Using novel
biomolecular approaches we are capable of regulating this level
of expression and testing the effects of changes in coupling
properties of these cells in conjunction with myocytes and
neurons. Our success relies on maintaining a contamination-free
laboratory coordinated by Research Technician Rosie Iturralde.
Collaborations allow us to conduct our research using the latest
technological innovations. Current collaborations include: the
Bioengineering Department and the Division of Cardiology at the
University of Utah (Frank Sachse, Phil Ershler), the Department
of Physiology at BYU (David Bursath), the Department of
Molecular Biology at the University of Medicine and Dentistry
(Gary S. Goldberg), the Methodist Research
Institute (Rafat Siddiqui and Carlos Labarrere), the School of
Engineering of Purdue University at Indianapolis (Ed Berbari),
the University of Chicago (Eric Beyer), and the Albert Eistein
College of Medicine (David Spray).
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