Subcellular localization of the amide class herbicide 3,4-dichloropropionanilide (DCPA) in T cells and hepatocytes.
3,4-Dichloropropionanilide (DCPA), or propanil, a post-emergent herbicide used on rice and wheat crops in the United States, is immunotoxic in vivo and in vitro. Although it has been documented that DCPA exerts differential effects on specific immune cell types and is toxic to the liver, the way in which DCPA modulates intracellular functions leading to these effects is less understood. In this study, Jurkat T cells and hepatocytes from C57Bl/6 mice were exposed to 100 microM DCPA for 1.5 h. Following incubation, subcellular fractions of each cell type were isolated. DCPA, when present, was removed from each cell fraction by liquid-liquid extraction. The extraction product was then analyzed for the presence of DCPA using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The cellular uptake of DCPA was monitored by detection of the molecular ion and product ion of DCPA. The analyses demonstrate that DCPA, a lipophilic compound, localizes primarily in the cytosol of T cells and hepatocytes. These results indicate that DCPA is able to cross the plasma membrane and is accessible to intracellular immunomodulatory effectors.
Hanson
Miranda L
ML
Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, West Virginia 26506-9177, USA.
Peer
Cody J
CJ
Brundage
Rodney
R
Callery
Patrick S
PS
Brundage
Kathleen
K
Schafer
Rosana
R
Eremin
Sergei
S
Barnett
John B
JB
D000818:Animals; D002458:Cell Fractionation; D002462:Cell Membrane / Q000737:chemistry; D003600:Cytosol / Q000737:chemistry; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D022781:Hepatocytes / Q000737:chemistry*; D006540:Herbicides / Q000032:analysis / Q000493:pharmacokinetics*; D006801:Humans; D019169:Jurkat Cells; D051379:Mice; D008810:Mice, Inbred C57BL; D008928:Mitochondria / Q000737:chemistry; D020675:Peroxisomes / Q000737:chemistry; D011411:Propanil / Q000032:analysis / Q000493:pharmacokinetics*; D013601:T-Lymphocytes / Q000737:chemistry*
D006540:Herbicides; D011411:Propanil