Selective Fluorescent Probe for the Immunoproteasome

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2019-TRAD-68454
Researchers at Purdue University have developed a fluorescent probe, TBZ, which selectively targets the core particle of the immunoproteasome (iCP) and can be used to monitor its expression in live cells. In an important cellular process that occurs within human and animal cells, proteins are degraded by the proteasome. As part of the molecular machinery of immune cells that have encountered inflammatory signals, a type of proteasome, the immunoproteasome, is a target of interest for autoimmune disease and cancer drug development. Current probes are not selective for iCP; they do not distinguish between this and other forms of the proteasome core particle. This new probe that fluoresces upon cleavage by iCP is efficient, selective, and can be used in live cells. Within 15 minutes of incubating the cell with 31 micromolar TBZ, iCP was detected in Ramos, SK-MEL-2, and A549 cell lines. At 31 micromolar, TBZ retains 3:1 selectivity for iCP versus the standard core particle.

Advantages:
-Selective towards iCP
-Can be used in live cells
-Higher fluorescence signal than commercial probe

Potential Applications:
-Intracellular iCP pathway monitoring
-Investigative protein expression

Tags: Chemistry and Chemical Analysis, Pharmaceuticals, Fluorescent Dyes, Reagents, Research Tools, Proteasome, Immune, Drug Discovery
Aug 5, 2021
NATL-Patent
United States
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Jan 29, 2020
PCT-Patent
WO
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Feb 5, 2019
Provisional-Patent
United States
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