1
|
Tkachev V, Furlan SN, Watkins B, Hunt DJ, Zheng HB, Panoskaltsis-Mortari A, Betz K, Brown M, Schell JB, Zeleski K, Yu A, Kirby I, Cooley S, Miller JS, Blazar BR, Casson D, Bland-Ward P, Kean LS. Combined OX40L and mTOR blockade controls effector T cell activation while preserving T reg reconstitution after transplant. Sci Transl Med 2018; 9:9/408/eaan3085. [PMID: 28931653 DOI: 10.1126/scitranslmed.aan3085] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 06/27/2017] [Indexed: 12/14/2022]
Abstract
A critical question facing the field of transplantation is how to control effector T cell (Teff) activation while preserving regulatory T cell (Treg) function. Standard calcineurin inhibitor-based strategies can partially control Teffs, but breakthrough activation still occurs, and these agents are antagonistic to Treg function. Conversely, mechanistic target of rapamycin (mTOR) inhibition with sirolimus is more Treg-compatible but is inadequate to fully control Teff activation. In contrast, blockade of OX40L signaling has the capacity to partially control Teff activation despite maintaining Treg function. We used the nonhuman primate graft-versus-host disease (GVHD) model to probe the efficacy of combinatorial immunomodulation with sirolimus and the OX40L-blocking antibody KY1005. Our results demonstrate significant biologic activity of KY1005 alone (prolonging median GVHD-free survival from 8 to 19.5 days), as well as marked, synergistic control of GVHD with KY1005 + sirolimus (median survival time, >100 days; P < 0.01 compared to all other regimens), which was associated with potent control of both TH/TC1 (T helper cell 1/cytotoxic T cell 1) and TH/TC17 activation. Combined administration also maintained Treg reconstitution [resulting in an enhanced Treg/Teff ratio (40% over baseline) in the KY1005/sirolimus cohort compared to a 2.9-fold decrease in the unprophylaxed GVHD cohort]. This unique immunologic signature resulted in transplant recipients that were able to control GVHD for the length of analysis and to down-regulate donor/recipient alloreactivity despite maintaining anti-third-party responses. These data indicate that combined OX40L blockade and sirolimus represents a promising strategy to induce immune balance after transplant and is an important candidate regimen for clinical translation.
Collapse
Affiliation(s)
- Victor Tkachev
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA.
| | - Scott N Furlan
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA.,Department of Pediatrics, University of Washington, Seattle, WA 98195, USA.,Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Benjamin Watkins
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA.,Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Daniel J Hunt
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Hengqi Betty Zheng
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Angela Panoskaltsis-Mortari
- Division of Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, MN 55454, USA
| | - Kayla Betz
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Melanie Brown
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - John B Schell
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Katie Zeleski
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Alison Yu
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | | | - Sarah Cooley
- Division of Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, MN 55454, USA
| | - Jeffrey S Miller
- Division of Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, MN 55454, USA
| | - Bruce R Blazar
- Division of Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, MN 55454, USA
| | | | | | - Leslie S Kean
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA 98101, USA. .,Department of Pediatrics, University of Washington, Seattle, WA 98195, USA.,Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| |
Collapse
|
2
|
Tkachev V, Furlan SN, Watkins BK, Zheng H(B, Hunt D, Panoskaltsis-Mortari A, Betz K, Brown M, Zeleski K, Yu A, Blazar BR, Casson D, Kirby I, Bland-Ward P, Kean LS. A Novel Therapeutic Strategy to Control Conventional T-Cells While Supporting Treg Reconstitution Post-Transplant: Long-Term GVHD-Free Survival by Combining OX40L Blockade with Rapamycin. Biol Blood Marrow Transplant 2017. [DOI: 10.1016/j.bbmt.2016.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
9
|
Millais AJ, Casson D, Lovelady J, Nicholson AM, Knowles CJ. The biotransformation of t-butylacetonitrile and its boron-containing analogue trimethylamine-cyanoborane by Brevibacterium R312. Arch Microbiol 1997; 168:164-8. [PMID: 9238109 DOI: 10.1007/s002030050483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The ability of the nitrile hydratase/amidase system from Brevibacterium R312 to biotransform tert-butylacetonitrile was studied with a view to their utilisation in the production of novel amino acids from isostructural compounds. Brevibacterium R312 was able to transform nitriles with this structure; however, the wide spectrum amidase from this organism was unable to biotransform the corresponding amide to the carboxylic acid.
Collapse
Affiliation(s)
- A J Millais
- The Research School of the Biosciences, Biological Laboratory, University of Kent, Canterbury, Kent, UK CT2 7NJ
| | | | | | | | | |
Collapse
|