Effects of 3-substituted aryl oxindole(PH II-7) on cell cycle of tumor cells / 药学学报
Acta Pharmaceutica Sinica
;
(12): 805-808, 2003.
Article
in Chinese
| WPRIM
| ID: wpr-266580
ABSTRACT
<p><b>AIM</b>To study the antitumor mechanism of 3-substituted aryl oxindole (PH II-7) and determine its effects on cell cycle distribution of tumor cells.</p><p><b>METHODS</b>The cell cycle distributions were determined with FACS. The cell cycle regulation-related proteins of K562 lysates were analyzed with Western Blot. The inhibition of PH II-7 on DNA synthesis of tumor cells were estimated though 3H-thymidine incorporation and the tyrosine kinase activity of EGFR of A431 lysates was measured with ELISA.</p><p><b>RESULTS</b>PH II-7 effected cell cycle distribution of several tumor cells, including multidrug resistant tumor cell lines, and accumulation of cells in the G0-G1 stages was observed. The cell cycle regulation-related proteins CDK2, Rb and c-myc were inhibited by PH II-7 in a dose dependent manner, whereas the expression of CyclinE was increased after exposure to PH II-7. Furthermore, PH II-7 2.0 mg.L-1 was shown to inhibit the incorporation of 3H-thymidine into DNA, and 21.89%-41.29% of the PTK activity of EGFR in A431 lysates was inhibited by PH II-7 2-8 mg.L-1 in a dose-dependant manner.</p><p><b>CONCLUSION</b>PH II-7, a new anti-tumor agent, blocks the transition of cell cycle of tumor cells from G1 to S phase by inhibition CDK2.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Pharmacology
/
DNA, Neoplasm
/
Cell Cycle
/
Proto-Oncogene Proteins c-myc
/
Retinoblastoma Protein
/
Drug Resistance, Multiple
/
Cell Cycle Proteins
/
Drug Resistance, Neoplasm
/
Cyclin E
Limits:
Humans
Language:
Chinese
Journal:
Acta Pharmaceutica Sinica
Year:
2003
Type:
Article
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