PMID- 34986722 OWN - NLM STAT- MEDLINE DCOM- 20220322 LR - 20240229 IS - 1475-6374 (Electronic) IS - 1475-6366 (Print) IS - 1475-6366 (Linking) VI - 37 IP - 1 DP - 2022 Dec TI - Inhibitory effect of roburic acid in combination with docetaxel on human prostate cancer cells. PG - 542-553 LID - 10.1080/14756366.2021.2018684 [doi] AB - Roburic acid (ROB) is a naturally occurred tetracyclic triterpenoid, and the anticancer activity of this compound has not been reported. Docetaxel (DOC) is the first-line chemotherapeutic agent for advanced stage prostate cancer but toxic side effects and drug resistance limit its clinical success. In this study, the potential synergistic anticancer effect and the underlying mechanisms of ROB in combination with DOC on prostate cancer were investigated. The results showed that ROB and DOC in combination synergistically inhibited the growth of prostate cancer cells. The combination also strongly induced apoptosis, and suppressed cell migration, invasion and sphere formation. Mechanistic study showed that the combined effects of ROB and DOC on prostate cancer cells were associated with inhibition of NF-kappaB activation, down regulation of Bcl-2 and up regulation of Bax. Knockdown of NF-kappaB by small interfering RNA (siRNA) significantly decreased the combined effect of ROB and DOC. Moreover, we found that esomeprazole (ESOM), a proton pump inhibitor (PPI), strongly enhanced the effectiveness of ROB and DOC on prostate cancer cells in acidic culture medium. Since acidic micro environment is known to impair the efficacy of current anticancer therapies, ESOM combined with ROB and DOC may be an effective approach for improving the treatment of prostate cancer patients. FAU - Wang, Xiao AU - Wang X AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. FAU - Xuetao, Xu AU - Xuetao X AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Wu, Mengshuo AU - Wu M AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. FAU - Wu, Panpan AU - Wu P AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Sheng, Zhaojun AU - Sheng Z AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Liu, Wenfeng AU - Liu W AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Ma, Yan-Yan AU - Ma YY AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Zhao, Den-Gao AU - Zhao DG AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Zhang, Kun AU - Zhang K AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Li, Dongli AU - Li D AUID- ORCID: 0000-0001-9955-2304 AD - School of Biotechnology and Health Sciences, Wuyi University, Jiangmen City, China. AD - International Healthcare Innovation Institute (Jiangmen), Jiangmen City, Guangdong Province, China. FAU - Zheng, Xi AU - Zheng X AD - Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA. FAU - Goodin, Susan AU - Goodin S AD - Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA. LA - eng PT - Journal Article PL - England TA - J Enzyme Inhib Med Chem JT - Journal of enzyme inhibition and medicinal chemistry JID - 101150203 RN - 0 (BCL2 protein, human) RN - 15H5577CQD (Docetaxel) RN - N3PA6559FT (Esomeprazole) RN - 0 (NF-kappa B) RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (roburic acid) SB - IM MH - Humans MH - Male MH - *Antineoplastic Combined Chemotherapy Protocols/chemical synthesis/chemistry/pharmacology MH - Cell Proliferation/drug effects MH - Cell Survival/drug effects MH - *Docetaxel/chemistry/pharmacology MH - Dose-Response Relationship, Drug MH - Drug Screening Assays, Antitumor MH - Esomeprazole/chemistry/pharmacology MH - Molecular Structure MH - NF-kappa B/antagonists & inhibitors/metabolism MH - *Prostatic Neoplasms/drug therapy/metabolism/pathology MH - Proto-Oncogene Proteins c-bcl-2/antagonists & inhibitors/metabolism MH - Structure-Activity Relationship MH - Tumor Cells, Cultured PMC - PMC8741252 OTO - NOTNLM OT - Prostate cancer OT - combination OT - docetaxel OT - roburic acid COIS- No potential conflict of interest was reported by the author(s). EDAT- 2022/01/07 06:00 MHDA- 2022/03/22 06:00 PMCR- 2022/01/05 CRDT- 2022/01/06 05:30 PHST- 2022/01/06 05:30 [entrez] PHST- 2022/01/07 06:00 [pubmed] PHST- 2022/03/22 06:00 [medline] PHST- 2022/01/05 00:00 [pmc-release] AID - 2018684 [pii] AID - 10.1080/14756366.2021.2018684 [doi] PST - ppublish SO - J Enzyme Inhib Med Chem. 2022 Dec;37(1):542-553. doi: 10.1080/14756366.2021.2018684.