Abstract:
:Adoptive transfer of tumor-specific cytotoxic T cells is a promising advance in cancer therapy. Similarly, checkpoint inhibition has shown striking clinical results in some patients. Here we combine adoptive cell transfer with ablation of the checkpoint protein Src homology 2-domain-containing phosphatase 1 (SHP-1, Ptpn6). Naturally occurring motheaten mice lack SHP-1 and do not survive weaning due to extensive immunopathology. To circumvent this limitation, we created a novel SHP-1(null) mouse that is viable up to 12 weeks of age by knocking out IL1r1. Using this model, we demonstrate that the absence of SHP-1 augments the ability of adoptively transferred CD8(+) T cells to control tumor growth. This therapeutic effect was only observed in situations where T-cell numbers were limited, analogous to clinical settings. However, adoptive transfer of non-CD8(+) SHP-1(null) hematopoietic cells resulted in lethal motheaten-like pathology, indicating that systemic inhibition of SHP-1 could have serious adverse effects. Despite this caveat, our findings support the development of SHP-1 inhibition strategies in human T cells to complement adoptive transfer therapies in the clinic.
journal_name
Immunol Cell Bioljournal_title
Immunology and cell biologyauthors
Watson HA,Dolton G,Ohme J,Ladell K,Vigar M,Wehenkel S,Hindley J,Mohammed RN,Miners K,Luckwell RA,Price DA,Matthews RJ,Ager Adoi
10.1038/icb.2016.45subject
Has Abstractpub_date
2016-09-01 00:00:00pages
802-8issue
8eissn
0818-9641issn
1440-1711pii
icb201645journal_volume
94pub_type
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