PMID- 34115902 OWN - NLM STAT- MEDLINE DCOM- 20220203 LR - 20220203 IS - 1365-2230 (Electronic) IS - 0307-6938 (Linking) VI - 46 IP - 8 DP - 2021 Dec TI - The novel AKT inhibitor afuresertib suppresses human Merkel cell carcinoma MKL-1 cell growth. PG - 1551-1554 LID - 10.1111/ced.14798 [doi] AB - Merkel cell carcinoma (MCC) is a highly aggressive neuroendocrine neoplasm of the skin, which has an exceedingly poor prognosis. The AKT/mammalian target of rapamycin (mTOR) signalling pathway, which plays a pivotal role in the modulation of protein synthesis and cell survival, has been shown to be extremely important for Merkel cell carcinogenesis. In the current study, we found that AKT has important regulatory functions in MCC cells and that inhibition of AKT with the novel ATP-competitive AKT inhibitor, afuresertib, has widespread effects on proliferative pathways. In particular, we found that treatment of MCC cells with afuresertib led to deactivation of mTOR and glycogen synthase kinase 3 pathway proteins while increasing activation of proapoptotic pathways through the upregulation of p16 expression and phosphomodulation of the B-cell lymphoma-2-associated death promoter. Overall, afuresertib treatment led to significant and robust inhibition of MCC cell proliferation, thus raising intriguing questions regarding the potential efficacy of AKT inhibition for the future clinical management of MCC. CI - (c) 2021 British Association of Dermatologists. FAU - Wu, J H AU - Wu JH AUID- ORCID: 0000-0001-5841-0414 AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. AD - Ronald O. Perelman Department of Dermatology, New York University, New York, NY, USA. FAU - Limmer, A L AU - Limmer AL AUID- ORCID: 0000-0001-6198-5921 AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. FAU - Narayanan, D AU - Narayanan D AUID- ORCID: 0000-0002-7137-8663 AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. FAU - Doan, H Q AU - Doan HQ AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. AD - Department of Dermatology, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. FAU - Simonette, R A AU - Simonette RA AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. FAU - Rady, P L AU - Rady PL AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. FAU - Tyring, S K AU - Tyring SK AD - Department of Dermatology, McGovern Medical School at The University of Texas Health Science Center, Houston, TX, USA. LA - eng PT - Journal Article DEP - 20210826 PL - England TA - Clin Exp Dermatol JT - Clinical and experimental dermatology JID - 7606847 RN - 0 (Antineoplastic Agents) RN - 0 (MRTFA protein, human) RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (Pyrazoles) RN - 0 (Thiophenes) RN - 0 (Trans-Activators) RN - 8739X25QI3 (afuresertib) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.26 (Glycogen Synthase Kinase 3) SB - IM MH - Antineoplastic Agents/*therapeutic use MH - Carcinoma, Merkel Cell/*drug therapy/pathology MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Genes, p16/drug effects MH - Glycogen Synthase Kinase 3/drug effects/metabolism MH - Humans MH - Phosphorylation MH - Proto-Oncogene Proteins c-akt/*antagonists & inhibitors MH - Proto-Oncogene Proteins c-bcl-2/drug effects/metabolism MH - Pyrazoles/*therapeutic use MH - Signal Transduction MH - Skin Neoplasms/*drug therapy/pathology MH - TOR Serine-Threonine Kinases/drug effects/metabolism MH - Thiophenes/*therapeutic use MH - Trans-Activators/*antagonists & inhibitors MH - Up-Regulation EDAT- 2021/06/12 06:00 MHDA- 2022/02/04 06:00 CRDT- 2021/06/11 17:27 PHST- 2021/06/07 00:00 [revised] PHST- 2021/02/07 00:00 [received] PHST- 2021/06/08 00:00 [accepted] PHST- 2021/06/12 06:00 [pubmed] PHST- 2022/02/04 06:00 [medline] PHST- 2021/06/11 17:27 [entrez] AID - 10.1111/ced.14798 [doi] PST - ppublish SO - Clin Exp Dermatol. 2021 Dec;46(8):1551-1554. doi: 10.1111/ced.14798. Epub 2021 Aug 26.