| RRC ID |
52228
|
| 著者 |
Ando H, Miyamoto T, Kashima H, Higuchi S, Ida K, Mvunta DH, Shiozawa T.
|
| タイトル |
Panobinostat Enhances Growth Suppressive Effects of Progestin on Endometrial Carcinoma by Increasing Progesterone Receptor and Mitogen-Inducible Gene-6.
|
| ジャーナル |
Horm Cancer
|
| Abstract |
Although progestin has been used to treat endometrial hyperplasia and endometrial carcinoma (EC), its therapeutic efficacy is limited. In order to improve this, the underlining mechanisms of the effects of progestin need to be elucidated in more detail. In the present study, we examined the involvement of mitogen-inducible gene-6 (MIG6), a negative regulator of the EGF receptor, in the progestin-mediated growth suppression of endometrial epithelia. The immunohistochemical expression of MIG6 was elevated in the early to mid-secretory phases of normal endometrium and also with endometrial hyperplasia after medroxyprogesterone acetate (MPA) therapy. The addition of progesterone (P4) to progesterone receptor (PR)-positive EC cells reduced the viability and induced MIG6 messenger RNA (mRNA) and protein expression. The silencing of MIG6 using siRNA eliminated the P4-mediated reduction of EC cell viability, indicating that MIG6 is an essential downstream component of PR-mediated growth suppression. In order to enhance PR-driven signals, we examined the effects of histone deacetylase (HDAC) inhibitors because histone acetylation has been shown to increase the expression of PR. The addition of three HDAC inhibitors (panobinostat, LBH589; trichostatin A, TSA; suberoylanilide hydroxamic acid, SAHA) decreased the viability of EC cells and up-regulated the expression of PR and MIG6, and these effects were the strongest with LBH589. The addition of LBH589 and MPA synergistically decreased the viability and increased apoptosis in EC cells. These results indicate that LBH589 has potential as an enhancer of progestin therapy via the up-regulation of PR and MIG6.
|
| 巻・号 |
8(4)
|
| ページ |
257-267
|
| 公開日 |
2017-8-1
|
| DOI |
10.1007/s12672-017-0295-4
|
| PII |
10.1007/s12672-017-0295-4
|
| PMID |
28516379
|
| MeSH |
Adaptor Proteins, Signal Transducing / genetics*
Adaptor Proteins, Signal Transducing / metabolism
Apoptosis / drug effects
Apoptosis / genetics
Biomarkers
Cell Line, Tumor
Cell Survival / drug effects
Cell Survival / genetics
Endometrial Neoplasms / genetics*
Endometrial Neoplasms / metabolism
Female
Gene Expression Regulation, Neoplastic / drug effects*
Histone Deacetylase Inhibitors / pharmacology*
Humans
Hydroxamic Acids / pharmacology*
Immunohistochemistry
Indoles / pharmacology*
Panobinostat
Progestins / pharmacology*
Receptors, Progesterone / genetics*
Receptors, Progesterone / metabolism
Signal Transduction / drug effects
Tumor Suppressor Proteins / genetics*
Tumor Suppressor Proteins / metabolism
|
| IF |
2.581
|
| 引用数 |
0
|
| リソース情報 |
| ヒト・動物細胞 |
HHUA(RCB0658) |
