Studies on the Influence of Certain Heavy Metals on Acid Phosphatase Activities

수종 중금속에 의한 Acid Phosphatase의 영향에 관한 연구

Mice were dosed with $HgCl_2$ (5, 10 and 20 mg per kilogram body weight) and $CdCl_2$ (10, 15 and 20 mg per kilogram body weight) by the abdominal injection. Acid phosphatase activites of the liver at 24, 48 and 72 hours following the injection were measured by the Mundry colorimetric method using disodium p-nitrophenyl phosphate as the substrate, and the following results were obtained. The enzyme activities measured were 3.47 mg Pi/ml/0.5 hr at 24 hr and 5.00mg/ml/0.5 hr at 72hr respectively following the injection of 5 mg/kg body weight of $HgCl_2$ and 6.79 mg Pi/ml0.5 hr at 24 hr and 3.47 mg Pi/ml/0.5 hr respectively following the injection of 20 mg/kg body weight of the mercury compound, as compared with the activity of 8.3 mg Pi/ml/0.5 hr for the control. With the cadmium treatment, about 50% of the animals injected with 10mg/kg body weight, and none of the animals injected with 15 and 20mg/kg body weight, survived. Of the surviving animals, the sublethal concentration of cadmium was shown to activate the enzyme: the activities at 24, 48 and 72hr following the injection were around 11.2 mg Pi/ml/0.5 hr as compared with 8.63 mg Pi/ml/0.5 hr for the control.

$HgCl_2$ 5mg/kg body wt., 10 mg/kg body wt. 그리고 20 mg/kg body wt.와 $CdCl_2$ 10mg/kg. body wt., 15 mg/kg body wt.와 20 mg/kg body wt.를 mouse의 복가에 주사한 후 각각 24시간, 48시간 그리고 72시간 후에 간을 적출하여 disodium p-nitrophenyl phosphate를 기질로 하고 Mundry 비색법으로 acid phosphatase 활성도를 측정하여 다음과 같은 결과를 얻었다. 즉 $HgCl_2$는 5 mg/kg body wt.를 처리한 후 24시간 경과 후 3.47 mg Pi/ml 0.5 hr이었고, 72시간 경과 후에는 5.00 mg Pi/ml/0.5 hr이었고, 20 mg/kg body wt.에서는 24시간 경과 후 6.79 mg Pi/ml/0.5 hr로, 72시간 경과 후에는 3.47 mg Pi/ml/0.5 hr로 나와 대조군의 8.3 mg Pi/ml/0.5 hr의 약 0.5배로 나타났다. EH한 $CdCl_2$는 15 mg/kg. body wt.와 20 mg/kg body wt.는 모두 죽었으니, 10 mg/kg body wt.에서는 거의 50% 정도가 살았고, 24시간, 48시간 그리고 72시간 경과 후에 거의 모두가 11.2 mg Pi/ml/0.5 hr로 나와 대조군의 8.63 mg Pi/ml/0.5 hr 보다 1.5배 정도 높게 나타나 activate시킴을 보여주었다.