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  • 1990-1994  (2)
  • Antineoplastic prostaglandins  (1)
  • Cytotoxicity  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 282 (1990), S. 131-134 
    ISSN: 1432-069X
    Keywords: Cytotoxicity ; PAM 212 cells ; Δ12-PGJ2 ; Heat shock protein ; Cytoskeleton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cyclopentenone prostaglandins (PGs) such as Δ12-PGJ2 and PGA are potent inducers of growth inhibition in a variety of cultured cells, including epidermal cells. These PGs are actively transported into cells by a specific carrier on cell membrane and accumulate in cell nuclei with binding to nuclear protein. To clarify the mechanism of cytotoxicity of these PGs in epidermal cells, we examined the effects of Δ12-PGJ2 on protein synthesis and cytoskeleton in the PAM 212 transformed mouse epidermal cell line. Cycloheximide at 1 Μg/ml culture medium exhibited a protective effect on cell growth inhibition of PAM 212 cells by Δ12-PGJ2. The analysis of cell lysate protein patterns by SDS-polyacrylamide gel electrophoresis revealed that 12-h incubation with Δ12-PGJ2 increased the amount of 70 kD protein in PAM 212 cells. The amount of 70 kD protein in Δ12-PGJ2-treated cells was markedly decreased by cotreatment with cycloheximide. This 70 kD protein was also induced in PAM 212 cells with treatment at 43
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1335
    Keywords: Human ovarian cancer cells ; Antineoplastic prostaglandins ; Cisplatin ; Adjuvant effects ; Nude mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Effects of antineoplastic prostaglandins (PG) on human ovarian cancer cell growth were examined by using HR cells derived from ascites of a patient with serous cystadenocarcinoma of the ovary. With regard to inhibition of cancer cell proliferation in vitro, the effects of Δ7-PGA was most marked, followed by that of Δ12-PGJ2, PGJ2 and PGD2. When antineoplastic prostaglandins were administered to nude mice bearing HR cells, tumor growth in groups treated with PGJ2 and Δ12-PGJ2 alone was significantly inhibited 63 days after tumor inoculation, compared to that in an untreated group. Consequently, a significant prolongation of median survival was obtained with Δ12-PGJ2, compared to that in untreated groups and in groups with cisplatin alone. In addition, when prostaglandins were administered together with cisplatin, adjuvant inhibitory effects on the tumor growth were obtained 35, 56 and 63 days after tumor inoculation. Subsequently a significant prolongation of median survival was observed when cisplatin was combined with PGD2 or Δ7-PGJ1, compared to the results in groups treated with PGD2 alone, Δ7-PGJ1 alone or cisplatin alone. Combination of PGJ2 or Δ12-PGJ2 and cisplatin resulted in a significant decrease of hematocrit and body weight 63 days after tumor inoculation, suggesting a deterioration of the median survival. These results suggest that combination of PGD2 or Δ7-PGJ1 with cisplatin may be of clinical use for ovarian cancer resistant to cisplatin.
    Type of Medium: Electronic Resource
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