Targeting PIM2 by JP11646 results in significant antitumor effects in solid tumors.
Int J Oncol
; 61(4)2022 Oct.
Article
em En
| MEDLINE
| ID: mdl-35920189
ABSTRACT
Proviral integration of Moloney virus 2 (PIM2) is a prosurvival factor of cancer cells and a possible therapeutic target in hematological malignancies. However, the attempts at inhibiting PIM2 have yielded underwhelming results in early clinical trials on hematological malignancies. Recently, a novel panPIM inhibitor, JP11646, was developed. The present study examined the utility of targeting PIM2 in multiple solid cancers and investigated the antitumor efficacy and the mechanisms of action of JP11646. When PIM2 expression was compared between normal and cancer tissues in publicly available datasets, PIM2 was found to be overexpressed in several types of solid cancers. PIM2 ectopic overexpression promoted tumor growth in in vivo xenograft breast cancer mouse models. The panPIM inhibitor, JP11646, suppressed in vitro cancer cell proliferation in a concentrationdependent manner in multiple types of cancers; a similar result was observed with siRNAmediated PIM2 knockdown, as well as an increased in cell apoptosis. By contrast, another panPIM inhibitor, AZD1208, suppressed the expression of downstream PIM2 targets, but not PIM2 protein expression, corresponding to no apoptosis induction. As a mechanism of PIM2 protein degradation, it was found that the proteasome inhibitor, bortezomib, reversed the apoptosis induced by JP11646, suggesting that PIM2 degradation by JP11646 is proteasomedependent. JP11646 exhibited significant anticancer efficacy with minimal toxicities at the examined doses and schedules in multiple in vivo mice xenograft solid cancer models. On the whole, the present study demonstrates that PIM2 promotes cancer progression in solid tumors. JP11646 induces apoptosis at least partly by PIM2 protein degradation and suppresses cancer cell proliferation in vitro and in vivo. JP11646 may thus be a possible treatment strategy for multiple types of solid cancers.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Proteínas Proto-Oncogênicas
/
Proteínas Serina-Treonina Quinases
Tipo de estudo:
Prognostic_studies
Limite:
Animals
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Female
/
Humans
Idioma:
En
Revista:
Int J Oncol
Assunto da revista:
NEOPLASIAS
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Estados Unidos
País de publicação:
GR
/
GRECIA
/
GREECE
/
GRÉCIA