Hfl. Mark et al., WOOD-DRYING CONDENSATE FROM EASTERN WHITE-PINE INDUCED CYTOTOXICITY AND GENOTOXICITY IN-VITRO, Annals of clinical and laboratory science, 26(1), 1996, pp. 64-70
Eastern white pine is one of the most important commercial species of
wood in the Northeast. Condensates extracted from this wood were teste
d to detect potential cytotoxicity and genotoxicity in Chinese Hamster
Ovary (CHO) cells in the absence of S-9 activation. Cytotoxicity was
measured by the Trypan blue exclusion assay, mitotic index (MI) and pr
oliferative rate index (PRI). Genotoxicity was measured by the chromos
ome aberration (CA) assay and sister chromatid exchange (SCE) analysis
. Both cytotoxic and genotoxic effects were observed. Laboratory-gener
ated Eastern white pine condensate reduced the viability of CHO cells.
The number of viable cells was roughly inversely proportional to dosa
ge over a range of 91 percent to 58 percent survival in treated groups
as compared to 2.4 x 10(5) viable cells (100 percent) in the control.
The mitotic index (MI) data also showed an inverse con-elation with d
osage. The highest scorable dose limited by toxicity was determined to
be 1 ml of Eastern white pine condensate in a total of 10 ml of mediu
m. Lastly, a dose response curve was observed using the CA assay and a
lso with the SCE analysis. The present findings support results obtain
ed from Ames testing of Eastern white pine condensate and also corrobo
rate results derived from human peripheral-blood lymphocytes.