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Published byHeather Summers Modified over 6 years ago
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Ixazomib reduces HIV-1 reservoir size in a Casp8p41-dependent manner
Nathan W Cummins, MD Assistant Professor of Medicine, Consultant in Infectious Diseases, Chair of Infectious Diseases Research, Mayo Clinic College of Medicine and Science Rochester, MN USA
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Disclosures Research funding from Takeda Pharmaceuticals
Off-label usage – Ixazomib – FDA IND
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Casp8p41/Bcl2 complex is polyubiquinated for proteasomal degradation.
HIV-1 protease cleaves procaspase 8 Casp8p41, which is expressed exclusively in infected cells, and is bound and inactivated by Bcl2 Casp8p41/Bcl2 complex is polyubiquinated for proteasomal degradation. Proteasome inhibitors, including ixazomib, increase Casp8p41 expression. Proteasome inhibitors independently induce HIV-1 reactivation in an NFkB dependent manner Proteasome inhibitors induce preferential apoptosis in HIV-1 infected cells versus uninfected cells. Treatment of ex vivo CD4 T cells from ART-suppressed patients with ixazomib significantly reduces total and integrated HIV-1 DNA.
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Phase 1b/2a, single center, dose escalation cohort clinical trial of ixazomib in ART-suppressed patients NCT IND 11 of 17 participants enrolled No serious AEs in 1mg, 2mg (completed) or 3mg (ongoing) cohorts to date HIV-1 reservoir measurements in peripheral CD4 T cells will be reported at a later date
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Acknowledgments Andrew D. Badley Clinical Trial Team
Badley HIV Immunology Lab, Mayo Clinic Sekar Natesampillai Zilin Nie Rahul Sampath Gary Bren Amy Sainski Mayo Clinic Collaborators Scott Kaufmann David J. Katzmann Eric Polley External Collaborators Jason V. Baker Keith Henry Marilia Pinzone Una O’Doherty Clinical Trial Team Stacey A. Rizza Aaron J. Tande Maryam Mahmood Shaji Kumar John Zeuli Christina Rivera James Allen DSMB Jennifer Whitaker Zelalem Temesgen Vincent Rajkumar
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