title: Applying proteomic methodologies to analyze the effect of hexamethylene bisacetamide (HMBA) on proliferation and differentiation of human gastric carcinoma BGC-823 cells.
abstract: Human gastric carcinoma BGC-823 cells underwent morphological differentiation and cell cycle arrest in vitro when treated with 5mM hexamethylene bisacetamide (HMBA) for 48h. To further understand the mechanism of HMBA-induced differentiation, proteomic methodologies were applied to screen and identify altered proteins involved in the commitment of BGC-823 cells to differentiate. Five distinct altered proteins were acquired by two-dimensional (2-D) PAGE and were consequently identified as ras-related protein rab-35 (Rab-35), splice truncated isoform of transmembrane protease, serine 3 (serine TADG-12), regulator of G-protein signaling 1 (RGS1), ret finger protein-like 1 (RFPL1) and F-actin capping protein alpha-3 subunit (GSG3) by analysis of mass spectrograph. Of the five proteins, serine TADG-12 down-regulated under the detectable level after HMBA treatment, Rab-35, RGS1 and RFPL1 sharply up-regulated within the HMBA-induced BGC-823 cells, and GSG3, appearing in both treated and untreated cells, remarkably increased within BGC-823 cells after HMBA stimulation. Our results implicate that the molecular mechanism of BGC-823 cell differentiation in response to HMBA may involved in complex processes including a signaling network linking vesicle transport, actin cytoskeleton remodeling except for morphology differentiation, cell cycle G1 arrest.
authors.affiliation: Department of Biology, Center for Proteomics, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China.
authors.forename: Guolin
authors.initials: G
authors.lastname: Zhang
authors.forename: Guizhong
authors.initials: G
authors.lastname: Wang
authors.forename: Sanying
authors.initials: S
authors.lastname: Wang
authors.forename: Qifu
authors.initials: Q
authors.lastname: Li
authors.forename: Gaoliang
authors.initials: G
authors.lastname: Ouyang
authors.forename: Xuanxian
authors.initials: X
authors.lastname: Peng
mesh_terms: D000081:Acetamides / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D015180:Electrophoresis, Gel, Two-Dimensional; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D011506:Proteins / Q000032:analysis; D040901:Proteomics / Q000379:methods*; D013274:Stomach Neoplasms / Q000188:drug therapy / Q000473:pathology*
chemical_list: D000081:Acetamides; D000970:Antineoplastic Agents; D011506:Proteins; C014026:hexamethylene bisacetamide