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
Dans Chinois
| 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>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Anatomopathologie
/
Pharmacologie
/
ADN tumoral
/
Cycle cellulaire
/
Protéines proto-oncogènes c-myc
/
Protéine du rétinoblastome
/
Multirésistance aux médicaments
/
Protéines du cycle cellulaire
/
Résistance aux médicaments antinéoplasiques
/
Cycline E
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Acta Pharmaceutica Sinica
Année:
2003
Type:
Article
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