PMID: 18423116Apr 22, 2008Paper

Correlation of sorcin overexpression to multidrug resistance of human gastric cancer cell line SGC7901

Ai zheng = Aizheng = Chinese journal of cancer
Qingchun HeWei-Jun Cao

Abstract

Vincristine (VCR)-resistant gastric cancer cell line SGC7901/VCR is a typical multidrug resistant (MDR) cell line with high expression of P-glycoprotein (P-gp). However, verapamil (VRP), the inhibitor of P-gp, can not totally reverse the drug resistance, indicating that additional mechanisms must contribute to the MDR phenotype. Our previous study showed that sorcin, a calcium-binding protein, is significantly up-regulated in SGC7901/VCR cells. This study was to explore the role of sorcin in the development of MDR in human gastric cancer cell line SGC7901. The full length sorcin cDNA was isolated by reverse transcription-polymerase chain reaction (RT-PCR). The FLAG-sorsin-pcDNA3.1 plasmid was constructed and transfected into SGC7901 cells. The mRNA and protein levels of sorcin in stable clones were detected by RT-PCR and Western blot. The sensitivity of SGC7901 cells to chemotherapeutic drugs was detected using MTT assay. Then sorcin-transfected SGC7901 cells (SGC-F-Sor) were transfected with sorcin antisense oligonucleotides (ASO). The VCR-sensitivity of SGC7901 cells was determined by MTT assay. The full-length sorcin cDNA (616 bp) was amplified by RT-PCR. The FLAG-sorsin-pcDNA3.1 plasmid was constructed successfully. The mRN...Continue Reading

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