The State University of New York

Beth Israel Deaconess Medical Center, Inc.

Thomas Suchyna

Frederick Sachs

Seth L Alper

Philip Gottlieb

David H Vandorpe

Chang Xu

Phillip Gottlieb

Janice Johnson

The present invention provides methods and compositions for inhibiting calcium permeable cation conductance of red blood cells from individuals afflicted with sickle cell anemia. The method comprises exposing the cells to the peptide GsMTx4 and/or variants thereof.

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The present invention discloses a peptide of SEQ ID NO:1 and its variants that blocks stretch-activated ion channels. All amino acids in this peptide are D-amino acids. The peptide, designated as D-GsMTx4, is an enantiomer of a peptide GsMTX-4 present in the venom of the spider. The present invention also discloses a method for inhibition of stretch activated ion channels in a cell. This peptide can be used for the treatment of cardiac arrhythmias and other pathologies that involve alterations in mechanical stress.

Mechanically activated channel blocker

The present invention discloses a peptide of SEQ ID NO:2 and its variants that blocks stretch-activated ion channels. The peptide, designated as GsMTx-4, is present in the venom of the spider. The present invention also discloses a method of purifying the peptide GsMTx-4 from the spider venom and a method for inhibition of stretch activated ion channels in a cell. The cDNA sequence encoding the GsMTx-4 is also disclosed. This peptide and its variants can be used for the treatment of cardiac arrhythmias.

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Amherst, NY, United States of America

Thomas Suchyna