Expression of membrane Hsp90 is a molecular signature of T cell activation.

Journal Article (Journal Article)

Heat shock protein 90 (Hsp90) maintains cellular proteostasis during stress and has been under investigation as a therapeutic target in cancer for over two decades. We and others have identified a membrane expressed form of Hsp90 (mHsp90) that previously appeared to be restricted to rapidly proliferating cells exhibiting a metastatic phenotype. Here, we used HS-131, a fluor-tethered mHsp90 inhibitor, to quantify the effect of T cell activation on the expression of mHsp90 in human and mouse T cells. In cell-based assays, stimulation of human T cells induced a 20-fold increase in mHsp90 expression at the plasma membrane, suggesting trafficking of mHsp90 is regulated by TCR and inflammatory mediated signaling. Following injection of HS-131 in mouse models of human rheumatoid arthritis and inflammatory bowel disease, we detected localization of the probe at sites of active disease, consistent with immune cell invasion. Moreover, despite rapid hepatobiliary clearance, HS-131 demonstrated efficacy in reducing the mean clinical score in the CIA arthritis model. Our results suggest mHsp90 expression on T cells is a molecular marker of T cell activation and potentially a therapeutic target for chronic diseases such as rheumatoid arthritis.

Full Text

Duke Authors

Cited Authors

  • Scarneo, SA; Smith, AP; Favret, J; O'Connell, R; Pickeral, J; Yang, KW; Ferrari, G; Loiselle, DR; Hughes, PF; Kulkarni, MM; Gargesha, M; Scott, B; Roy, D; Haynes, BF; Kwiek, JJ; Haystead, TAJ

Published Date

  • October 27, 2022

Published In

Volume / Issue

  • 12 / 1

Start / End Page

  • 18091 -

PubMed ID

  • 36302951

Pubmed Central ID

  • PMC9613876

Electronic International Standard Serial Number (EISSN)

  • 2045-2322

Digital Object Identifier (DOI)

  • 10.1038/s41598-022-22788-8


  • eng

Conference Location

  • England