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Expression and Function of Classical Protein Kinase C Isoenzymes in Gastric Cancer Cell Line and Its Drug-resistant Sublines

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Specialty Gastroenterology
Date 2002 Jun 5
PMID 12046066
Citations 14
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Abstract

Aim: To investigate the expression and function of classical protein kinase C (PKC) isoenzymes in inducing MDR phenotype in gastric cancer cells.

Methods: Two cell lines were used in the study: gastric cancer cell SGC7901 and its drug-resistant cell SGC7901/VCR stepwise-selected by vincristine 0.3, 0.7 and 1.0 mg.L(-1), respectively. The expression of classical PKC (cPKC) isoenzymes in SGC7901 cells and SGC7901/VCR cells were detected using immunofluorescent cytochemistry, laser confocal scanning microscope and Western blot. The effects of anti-PKC isoenzymes antibody on adriamycin accumulation in SGC7901/VCR cells were determined using flow cytometric analysis.

Results: (1)SGC7901 cells exhibited positive staining of PKC-alpha. SGC7901/VCR cells exhibited stronger staining of PKC-alpha than SGC7901 cells. The higher dosage vincristine selected, the much stronger staining of PKC-alpha was observed on SGC7901/VCR cells. (2)Both SGC7901 and SGC7901/VCR cells exhibited positive staining of PKC-beta I and PKC-beta II with no significant difference. (3) Compared with SGC7901, SGC7901/VCR cells had decreased adriamycin accumulation and retention. Accumulation of adriamycin in SGC7901 was 5.21+/-2.56 mg.L(-1),in SGC7901/VCR 0.3 was 0.85+/-0.29 mg.L(-1), in SGC7901/VCR 0.7 was 0.81+/-0.32 mg.L(-1), and in SGC7901/VCR 1.0 was 0.80+/-0.33 mg.L(-1); Retention of adriamycin in SGC 7901 was 2.51+/-1.23 mg.L(-1), in SGC7901/VCR 0.3 was 0.47+/-0.14 mg.L(-1), in SGC7901/VCR 0.7 was 0.44+/-0.15 mg.L(-1), and in SGC 7901/VCR 1.0 was 0.41+/-0.11 mg.L(-1). (4) Fluorescence intensity presented adriamycin accumulation in SGC7901/VCR cells was increased from 1.14+/-0.36 to 2.71+/-0.94 when cells were co-incubated with anti-PKC-alpha but not with anti-PKC-beta I PKC-beta II and PKCgamma antibodies.

Conclusion: PKC-alpha, but not PKC-beta I, PKC-beta II or PKCgamma, may play a role in multidrug resistance of gastric cancer cells SGC7901/VCR.

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References
1.
Merritt J, Sullivan J, Drew L, Khan A, Wilson K, Mulqueen M . The bisindolylmaleimide protein kinase C inhibitor, Ro 32-2241, reverses multidrug resistance in KB tumour cells. Cancer Chemother Pharmacol. 1999; 43(5):371-8. DOI: 10.1007/s002800050909. View

2.
van Gijn R, van Tellingen O, Haverkate E, Bult A, Beijnen J . Pharmacokinetics and metabolism of the staurosporine analogue CGP 41 251 in mice. Invest New Drugs. 1999; 17(1):29-41. DOI: 10.1023/a:1006260217400. View

3.
Lopez-Soriano F, Argiles J . Lipids: A key role in multidrug resistance? (Review). Int J Oncol. 2000; 16(4):783-98. DOI: 10.3892/ijo.16.4.783. View

4.
Matsumoto Y, Kunishio K, Nagao S . Increased phosphorylation of DNA topoisomerase II in etoposide resistant mutants of human glioma cell line. J Neurooncol. 2000; 45(1):37-46. DOI: 10.1023/a:1006346624083. View

5.
Shtil A, Ktitorova O, Kakpakova E, Holian O . Differential effects of the MDR1 (multidrug resistance) gene-activating agents on protein kinase C: evidence for redundancy of mechanisms of acquired MDR in leukemia cells. Leuk Lymphoma. 2001; 40(1-2):191-5. DOI: 10.3109/10428190009054896. View