title: Stromal interaction molecule 1 (STIM1) silencing inhibits tumor growth and promotes cell cycle arrest and apoptosis in hypopharyngeal carcinoma.
abstract: As an important pathway maintaining the balance of intracellular calcium (Ca(2+)), store-operated Ca(2+) entry (SOCE) is critical for cellular functions. Stromal interaction molecule 1 (STIM1), a key component of SOCE, plays a dual role as an endoplasmic reticulum Ca(2+) receptor and an SOCE exciter. Aberrant expression of STIM1 could be discovered in several human cancer cells. However, the role of STIM1 in regulating human hypopharyngeal carcinoma still remains unclear. Real-time polymerase chain reaction (PCR) was used to detect expression of STIM1 in human hypopharyngeal carcinoma cell line FaDu. STIM1 on FaDu cells was knocked down by lentiviral transduction method. The biological impacts after knocking down of STIM1 on FaDu cells were investigated in vitro and in vivo. The result of real-time PCR showed that STIM1 was expressed in FaDu cells. Lentiviral transduction efficiently downregulated the expression of STIM1 in FaDu cells at both mRNA and protein levels. Significant downregulation of STIM1 on FaDu cells inhibited cell proliferation, induced cell cycle arrest in G0/G1 phase, promoted cell apoptosis, and restrained cell growth rate. The antigrowth effect of STIM1 silencing was also discovered in FaDu hypopharyngeal tumor model. Our findings indicate that STIM1 is likely to become a new therapeutic target for hypopharyngeal carcinoma treatment.
authors.affiliation: Department of Otorhinolaryngology, Inner Mongolia Medical University Affiliated Hospital, No. 1, Tongdao North Street, Hohhot, 010050, Inner Mongolia, People's Republic of China.
authors.forename: Yuanhao
authors.initials: Y
authors.lastname: Sun
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Cui
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Shuai
authors.initials: S
authors.lastname: Wu
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Bai
authors.forename: Yaping
authors.initials: Y
authors.lastname: Wang
authors.forename: Boqian
authors.initials: B
authors.lastname: Wang
authors.forename: Jugao
authors.initials: J
authors.lastname: Fang
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000235:genetics*; D002118:Calcium / Q000378:metabolism; D059447:Cell Cycle Checkpoints / Q000235:genetics*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000235:genetics*; D015536:Down-Regulation / Q000235:genetics; D016193:G1 Phase / Q000235:genetics; D006801:Humans; D007012:Hypopharyngeal Neoplasms / Q000235:genetics* / Q000378:metabolism; D008565:Membrane Proteins / Q000235:genetics*; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009363:Neoplasm Proteins / Q000235:genetics*; D016192:Resting Phase, Cell Cycle / Q000235:genetics; D000071737:Stromal Interaction Molecule 1
chemical_list: D008565:Membrane Proteins; D009363:Neoplasm Proteins; C103530:STIM1 protein, human; D000071737:Stromal Interaction Molecule 1; D002118:Calcium
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