2010
DOI: 10.3892/or_00001066
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Overexpression of sorcin results in multidrug resistance in gastric cancer cells with up-regulation of P-gp

Abstract: Abstract. Sorcin, a calcium-binding protein was found upregulated in the vincristine-induced multi-drug resistance (MDR) gastric cancer cell line SGC7901/VCR, over its parental SGC7901 cells in our previous proteomic studies. The present study explored the role and mechanism of sorcin in the development of MDR in gastric cancer. We constructed the recombinant plasmids FLAG-sorsin-pcDNA3.1 containing the full open reading frame of sorcin and a FLAG affinity tag. Overexpression of sorcin by gene transfection was… Show more

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Cited by 23 publications
(6 citation statements)
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“…8,38 Moreover, the expression of cP-gp and sorcin were significantly correlated. 13 Regarding NHERF1 and multidrug resistance proteins, we demonstrated only an inverse trend between positive cNHERF1 expression and negative nHIF-1a expression. In previous studies, we showed an upregulation of this protein by hypoxia in breast cancer and a significant association between NHERF1 and HIF-1a in colorectal cancer.…”
Section: Discussionmentioning
confidence: 67%
See 1 more Smart Citation
“…8,38 Moreover, the expression of cP-gp and sorcin were significantly correlated. 13 Regarding NHERF1 and multidrug resistance proteins, we demonstrated only an inverse trend between positive cNHERF1 expression and negative nHIF-1a expression. In previous studies, we showed an upregulation of this protein by hypoxia in breast cancer and a significant association between NHERF1 and HIF-1a in colorectal cancer.…”
Section: Discussionmentioning
confidence: 67%
“…[7][8][9][10][11][12] Furthermore, the soluble resistance-related calcium binding protein (sorcin) is involved in the up-regulation of P-gp in GC cell lines and thus in the development of the MDR phenotype. [13][14][15][16] Hypoxia, a common characteristic of many tumors, has also been described as a crucial player in the drug resistance mechanisms. [17][18][19] In particular, hypoxia-inducible factor-1a (HIF-1a) is involved in the tumor response to cellular hypoxia through the transcriptional regulation of a large number of hypoxia-related genes, including MDR genes.…”
Section: Introductionmentioning
confidence: 99%
“…On the strength of previous research works, three possible mechanisms that SORCIN participated in MDR are summarized. First, SORCIN might regulate the expression of P-gp (He et al, 2010;Parekh, Deng, Choudhary, Houser, & Simpkins, 2002). Second, it influenced intracellular free calcium, which linked to cell apoptosis (Maddalena et al, 2011).…”
Section: Discussionmentioning
confidence: 99%
“…The previous studies proved that SRI acted as a pro-oncogenic and multidrug resistance gene in certain types of cancers (11)(12)(13)(14)(15). The resistance to chemotherapeutic agents is recognized as a major hurdle in cancer therapy.…”
Section: Introductionmentioning
confidence: 99%