Department of Pharmacology SL83, Tulane University School of Medicine,
1430 Tulane Avenue, New Orleans, LA 70112-2699.
Telephone: (504) 588-8207; Fax (504) 588-5283; Email: mli@.tulane.edu
Long-term interests of this laboratory are focused on the role of voltage-gated
calcium channels in cellular excitability and hormone secretion. We have used
pancreatic isleislet beng multiple types of voltage-gated calcium channels as
a model system. Voltage-gated calcium channels are multi-subunit proteins with
homologous principle subunits that are associated with multiple auxiliary subunits.
The principal subunits are about 2500 amino acids in length and contain four
homologous domains having six transmembrane segments in each. We are the first
laboratory to isolate and clone the gene encoding the T-type calcium channel
in pancreatic islet beta cells. We have demonstrated that this channel
plays an important role in beta cell excitability and in the regulation of calcium homeostasis of the cell. We are also interested
in developing new drugs that target calcium channels, which could be useful
in the treatment of diabetes and other diseases. Techniques used in this laboratory
include patch clamp recording, double electrode-voltage clamp, calcium fluorescence
measuring, in combination with heterologous expression of cloned channels in
mammalian cells and xenopus oocytes.
Dr. Ming Li's research publications.
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This page was last updated on July 18, 2001.