Protein Information

ID 12
Name caspase 3
Synonyms Apopain; CASP 3; CASP3; CPP 32; CPP32; CPP32B; Caspase 3; Caspase 3 precursor…

Compound Information

ID 202
Name chlorpyrifos
CAS

Reference

PubMed Abstract RScore(About this table)
18996166 Li Q, Kobayashi M, Kawada T: Chlorpyrifos induces apoptosis in human T cells. . Toxicology. 2009 Jan 8;255(1-2):53-7. Epub 2008 Oct 17.
It was found previously that organophosphorus pesticides (OPs) significantly inhibited cytotoxic T lymphocyte (CTL) activity. To explore the mechanism of OP-induced inhibition of CTL activity, the present study investigated whether OPs can induce cell death/apoptosis in T cells. Jurkat human T cells were treated with chlorpyrifos at 0-100 ppm for 2, 4, and 6h at 37 degrees C in vitro. It was found that chlorpyrifos induced cell death of Jurkat human T cells in a dose- and time-dependent manner, as shown by MTT and LDH assays. Then, it was investigated if chlorpyrifos-induced cell death consisted of apoptosis, as determined by analysis of Annexin-V staining and the intracellular level of active caspase-3 by flow cytometry, and DNA fragmentation analysis. It was found that chlorpyrifos induces apoptosis in Jurkat T cells in a dose- and time-dependent manner, as determined by analysis of Annexin-V staining. DNA fragmentation was detected when cells were treated with 50 or 100 ppm chlorpyrifos for 4 and 6h. Chlorpyrifos also induced an increase in intracellular active caspase-3 in Jurkat T cells in a dose- and time-dependent manner, and a caspase-3 inhibitor, Z-DEVD-FMK, significantly inhibited chlorpyrifos-induced apoptosis. These findings indicate that chlorpyrifos can induce apoptosis in human Jurkat T cell cells, and this effect is partially mediated by the activation of intracellular caspase-3.
118(1,2,3,3)