PMID- 30779097 OWN - NLM STAT- MEDLINE DCOM- 20200708 LR - 20200708 IS - 2284-0729 (Electronic) IS - 1128-3602 (Linking) VI - 23 IP - 3 DP - 2019 Feb TI - Cellular mechanism of Tbeta4 intervention in liver fibrosis by regulating NF-kappaB signaling pathway. PG - 1279-1290 LID - 17023 [pii] LID - 10.26355/eurrev_201902_17023 [doi] AB - OBJECTIVE: To investigate the inhibitory effect of thymosin-beta4 (Tbeta4) on the activation of the human hepatic stellate cell line (HSC-LX2) induced by interleukin (IL)-1beta. MATERIALS AND METHODS: There were 5 groups in this study, i.e., blank control group, negative control group (SI-NC, empty plasmid), model group (20 ng/ml of IL-1beta), siRNA-Tbeta4 knockdown group (IL-1beta and si-Tbeta4) and Tbeta4 treatment group (IL-1beta and 1000 ng/ml of Tbeta4). Cell proliferation rate was measured using the Cell Counting Kit-8 (CCK-8) method. The cell cycle change and percentage of apoptotic cells were determined by Propidium Iodide (PI) DNA staining and Annexin V-fluorescein isothiocyanate (FITC) double staining. Cellular nucleic acid levels of p-IKB and nuclear factor-kappa B (NF-kappaB)/p65 proteins were measured by fluorescent quantitative Real Time-Polymerase Chain Reaction (RT-PCR). Double immunofluorescence staining and Western blot were used to detect nuclear translocation of NF-kappaB and p65 and levels of cytoplasmic p-IKB protein and nuclear p65 protein. RESULTS: Due to the G0/G1 phase arrest, the number of cells in the Tbeta4 treatment group increased, compared with the model group and the siRNA-Tbeta4 knockdown group (p<0.01). In the same between-group comparison, apoptotic rate in the Tbeta4 treatment group increased significantly (p<0.05). The cellular nucleic acid levels of p-IKB and NF-kappaB/p65 were markedly higher in the model group and the siRNA-Tbeta4 knockdown group than in the blank control group (p<0.01). The cellular nucleic acid levels of p-IKB and NF-kappaB/p65 were remarkably lower in the Tbeta4 treatment group than in the siRNA-Tbeta4 knockdown group (p<0.01). The expression levels of NF-kappaB/p65 and NF-kappaB/p50 were significantly lower in the Tbeta4 treatment group. The expression levels of cytoplasmic p-IKB and nuclear NF-kappaB/p65 were lower in the Tbeta4 treatment group than in the model group (p<0.01). CONCLUSIONS: Tbeta4 significantly inhibited IL-1beta-induced HSC-LX2 cell proliferation. The mechanism may involve decreased activation of the NF-kappaB pathway, decreased expression of p-IKB and nuclear translocation of p65. Therefore, Tbeta4 had the effect of reversing liver fibrosis. FAU - Zhu, Z-X AU - Zhu ZX AD - Department of Clinical Medicine, Guizhou Medical University, Guiyang, P. R. China. mcw23b@163.com. FAU - Zhu, L-L AU - Zhu LL FAU - Cheng, Z AU - Cheng Z FAU - Zhao, X-K AU - Zhao XK FAU - Liu, Y-M AU - Liu YM FAU - Fan, L-D AU - Fan LD FAU - Zou, G-L AU - Zou GL FAU - Ouyang, Q-Y AU - Ouyang QY FAU - Cheng, M-L AU - Cheng ML LA - eng PT - Journal Article PL - Italy TA - Eur Rev Med Pharmacol Sci JT - European review for medical and pharmacological sciences JID - 9717360 RN - 0 (Interleukin-1beta) RN - 0 (RNA, Small Interfering) RN - 0 (Transcription Factor RelA) RN - 549LM7U24W (thymosin beta(4)) RN - 61512-21-8 (Thymosin) SB - IM MH - Animals MH - Cell Line MH - Cell Proliferation/drug effects/genetics MH - Gene Knockdown Techniques MH - Hepatic Stellate Cells/drug effects/*metabolism/pathology MH - Interleukin-1beta/pharmacology MH - Liver Cirrhosis/*metabolism/pathology MH - RNA, Small Interfering/genetics MH - Rats MH - Signal Transduction MH - Thymosin/genetics/*metabolism/pharmacology MH - Transcription Factor RelA/*metabolism EDAT- 2019/02/20 06:00 MHDA- 2020/07/09 06:00 CRDT- 2019/02/20 06:00 PHST- 2019/02/20 06:00 [entrez] PHST- 2019/02/20 06:00 [pubmed] PHST- 2020/07/09 06:00 [medline] AID - 17023 [pii] AID - 10.26355/eurrev_201902_17023 [doi] PST - ppublish SO - Eur Rev Med Pharmacol Sci. 2019 Feb;23(3):1279-1290. doi: 10.26355/eurrev_201902_17023.