• Home
  • Search Results
  • Antitumor activity of a 2-pyridinecarboxaldehyde 2-pyridinecarboxylic acid hydrazone copper complex and the related mechanism.

Antitumor activity of a 2-pyridinecarboxaldehyde 2-pyridinecarboxylic acid hydrazone copper complex and the related mechanism.

Oncology reports (2015-07-03)
Yingli Yang, Tengfei Huang, Sufeng Zhou, Yun Fu, Youxun Liu, Yanbin Yuan, Qiongqing Zhang, Shaoshan Li, Changzheng Li
ABSTRACT

In the present study, 2-pyridinecarboxaldehyde 2-pyridinecarboxylic acid hydrazone (PPAH) was prepared and its antitumor activity was evaluated. The inhibition of proliferation of PPAH against the HepG2 and HCT-116 cell lines was less effective, yet in the presence of copper ions, the mixture demonstrated excellent antitumor activity (IC50 at 2.75±0.30 µM for the HepG2 cell line, and 1.90±0.20 µM for the HCT-116 cell line, respectively) and the new active species was confirmed to be a PPAH copper complex with a 1:1 ratio by spectral analysis. The excellent antitumor activity of the copper complex prompted us to investigate the underlying mechanism. RT-PCR was performed to detect the changes in the expression of apoptotic genes induced by PPAH and its copper complex. However, no changes were observed when the cells were treated by the agents for 24 or 48 h, indicating that ROS were unlikely involved. Cell cycle analysis showed that both PPAH and its copper complex led to S phase arrest of the cells. The sDNA relaxation assay revealed that the PPAH-copper complex displayed dual topoisomerase inhibition for type I and II. The data suggest that the inhibition of proliferation exhibited by the PPAH copper complex may stem from its dual topoisomerase inhibition, which is rarely observed for a metal complex.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.9 atom % D
Sigma-Aldrich
Thiazolyl Blue Tetrazolium Bromide, powder, BioReagent, suitable for cell culture, suitable for insect cell culture, ≥97.5% (HPLC)
Sigma-Aldrich
Thiazolyl Blue Tetrazolium Bromide, 98%
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 0.03 % (v/v) TMS
Sigma-Aldrich
Ethidium bromide solution, BioReagent, for molecular biology, 10 mg/mL in H2O
Sigma-Aldrich
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.5 atom % D
Sigma-Aldrich
Ethidium bromide, BioReagent, for molecular biology, powder
Sigma-Aldrich
Ethidium bromide solution, BioReagent, for molecular biology, 500 μg/mL in H2O
Sigma-Aldrich
Ethidium bromide, ~95% (HPLC)
Sigma-Aldrich
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D, contains 0.03 % (v/v) TMS
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 1 % (v/v) TMS
Sigma-Aldrich
Dimethyl sulfoxide-d6, anhydrous, 99.9 atom % D
Sigma-Aldrich
Ethidium bromide solution, for fluorescence, ~1% in H2O
Sigma-Aldrich
Dimethyl sulfoxide-d6, "Special HOH", ≥99.9 atom % D
Supelco
Pyridaben, PESTANAL®, analytical standard
Sigma-Aldrich
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D
Sigma-Aldrich
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D