Mm. Suzuki et al., POLYCHLORINATED-BIPHENYLS (PCBS) DEPRESS ALLOGENEIC NATURAL CYTOTOXICITY BY EARTHWORM CELOMOCYTES, Environmental toxicology and chemistry, 14(10), 1995, pp. 1697-1700
Coelomocytes of the earthworm Lumbricus terretris caused significant s
pontaneous allogeneic cytotoxicity in a 24-h trypan blue assay, but no
t in an assay using lactate dehydrogenase (LDH) release. Allogeneic cy
totoxicity assays using cells from worms exposed to polychlorinated bi
phenyls (PCBs) suggest that PCBs can suppress a natural killing (NK-li
ke) reaction. The implications of this work are twofold: understanding
the evolution of natural killing (NK-like) activity and providing pre
liminary information on how spontaneous killing, a component of cellul
ar immunity, may be compromised by pollutants.