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SHP2 inhibition triggers anti-tumor immunity and synergizes with PD-1 blockade
- Source :
- Acta Pharmaceutica Sinica. B, Acta Pharmaceutica Sinica B, Vol 9, Iss 2, Pp 304-315 (2019)
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Tyrosine phosphatase SHP2 is a promising drug target in cancer immunotherapy due to its bidirectional role in both tumor growth promotion and T-cell inactivation. Its allosteric inhibitor SHP099 is known to inhibit cancer cell growth both in vitro and in vivo. However, whether SHP099-mediated SHP2 inhibition retards tumor growth in vivo via anti-tumor immunity remains elusive. To address this, a CT-26 colon cancer xenograft model was established in mice since this cell line is insensitive to SHP099. Consequently, SHP099 minimally affected CT-26 tumor growth in immuno-deficient nude mice, but significantly decreased the tumor burden in CT-26 tumor-bearing mice with intact immune system. SHP099 augmented anti-tumor immunity, as shown by the elevated proportion of CD8+IFN-γ+ T cells and the upregulation of cytotoxic T-cell related genes including Granzyme B andPerforin, which decreased the tumor load. In addition, tumor growth in mice with SHP2-deficient T-cells was markedly slowed down because of enhanced anti-tumor responses. Finally, the combination of SHP099 and anti-PD-1 antibody showed a higher therapeutic efficacy than either monotherapy in controlling tumor growth in two colon cancer xenograft models, indicating that these agents complement each other. Our study suggests that SHP2 inhibitor SHP099 is a promising candidate drug for cancer immunotherapy.<br />Graphical abstract The SHP2 allosteric inhibitor, SHP099, is a promising drug candidate for cancer immunotherapy. SHP2 inhibition both enhances and normalizes anti-tumor immunity, and the combination of SHP099 and anti-PD-1 is a potentially robust therapeutic strategy for cancer control.fx1
- Subjects :
- Original article
Colorectal cancer
medicine.medical_treatment
Cancer immunotherapy
SHP099
03 medical and health sciences
0302 clinical medicine
Immune system
In vivo
PD-1
medicine
Cytotoxic T cell
General Pharmacology, Toxicology and Pharmaceutics
030304 developmental biology
0303 health sciences
biology
Chemistry
lcsh:RM1-950
medicine.disease
Colon cancer
Granzyme B
lcsh:Therapeutics. Pharmacology
030220 oncology & carcinogenesis
Cancer cell
Cancer research
biology.protein
SHP2
Antibody
Subjects
Details
- ISSN :
- 22113835
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Acta Pharmaceutica Sinica B
- Accession number :
- edsair.doi.dedup.....a55b4b274492641b5e42d39dc80e77ae