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중금속류가 취 절편의 amylase분비에 미치는 영향

Other Titles
 Effect of heavy metals on the secretion of amylase in rat pancreas fragments 
Authors
 김혜영 
Issue Date
1981
Description
보건학과/석사
Abstract
[영문]

[한글]

현대 산업의 발달은 간접 혹은 직접적으로 중금속에의 노출위험이 점차 크게 되었다.

또한 산업발달에 의한 위험뿐 아니라 농약, 살충제, 화학물질, 치료제등의 사용증가도 중

금속 중독증가의 요인이 되고있다. 이들 중금속은 체내 친화력이 큰 장기에 주로 축적되

어 여러 독작용을 나타낸다. Cadmium은 주로 신장에서 독작용을 보이며 동은 용혈성 빈혈

등을 납은 신경, 조혈계에 독작용을 보이며 아연은 약한 독성만을 보인다. 그러나 중금속

이 취amylase분비에 미치는 영향에 대한 보고는 거의 없다. 이에 본 실험에서는 중금속류

가 취 절편 amylase분비에 미치는 영향을 검색하였다.

실험동물로는 무게 90g 내외의 쥐를 사용하여 Case 및 Clausen(1973)의 방법에 의거,

약 90mg 내외의 취장 uncinate process를 취하여 중금속 10**-6 , 10**-5 , 10**-4 M단독

첨가나 CCK-OP 10**-8 M,병용첨가로 초래되는 취 절편 amylase분비를 측정하였다.

실험성적을 요약하면 다음과 같다.

1. 생리적 식염수를 첨가한 대조군은 4.3, 4.6 I.U./g/min의 amylase분비를 보였고 CCK

-OP 10**-8 M 병용첨가에서는 amylase분비가 급격히 증가하여 15.4 I.U./g/min까지 증가

되었다.

2. CdCl^^2 (Cadmium chloride) 10**-6 , 10**-5 , 10**-4 M 단독첨가에서는 대조군과

유사한 amylase분비를 보였으나 CCK-OP 10**-8 M병용첨가에서는 amylase분비가 의의있게

감소하였다.

3. CuCl^^2 (Copper chloride)첨가군에서는 CuCl^^2 10**-6 M 단독 혹은 CCK-OP 병용첨

가로 대조군과 유사한 amylase분비 반응을 보이나 10**-5 M에서는 amylase 분비억제경향

을, 10**-4 M에서는 현저한 amylase분비억제를 나타내었다.

4. PbCl^^2 (Lead chloride)첨가군에서는 PbCl^^2 10**-6 M 단독 혹은 CCK-OP 10**-8 M

병용첨가로 대조군과 유사한 amylase분비치를 보이나 10**-5 , 10**-4 M 단독첨가에서는

의의있는 amylase분비항진을 나타내었고 CCK-OP단독첨가한 대조실험과 유사한 분비반응

을 보였다.

5. ZnCl^^2 (Zino chloride)첨가군에서는 ZnCl^^2 10**-6 , 10**-5, 10**-4 M 단독 혹

은 CCK-OP 병용첨가에서 대조군과 유사한 분비반응을 보였다.





Effect of heavy metals on the secretion of amylase in rat pancreas fragments



Hea Young Kim

Department of Public Health The Graduate School Yonsei University

(Directed by Professor :Won Joon Kim M. D.)



Heavy metals which are present as trace elements in human body have been known to

modify various enzymatic reaction. These metals can be essential or non-essential.

Zinc, copper and calcium are essential in maintaining some biological processes,

whereas non-essential metals such as cadmium, lead and mercury produce accumulative

toxic effect.

Cadmium accumulated in pancreas can cause toxicity and damage of pancreatic

cells, thereby influencing CHO metabolism. Lead compounds are known to produce

toxic effects on the kidney, digestive system and brain followed by inhibition of

activity of δ-aminolevulinic acid and biosynthesis of hemoproteins and cytochrome.

Evidence has been accumulated that zinc not only acts as a cofactor in enzyme

reaction but also prevents toxic effect induced by heavy metal such as copper and

cadmium.

To demonstrate the effect of heavy metals on pancreatic secretion, part of

uncinate pancreas was taken and incubated in Krebs-Ringer bicarbonate buffer with

heavy metals used. Additional treatment with CCK-OP was performed when needed.

After incubation during different period of time, medium was analyzed for amylase

activity using Sumner's method.

The present study was attempted in order to elucidate the effect of several kinds

of heavy metal on exocrine pancreatic secretion in vitro.

The results obtained are as follows:

1. CCK-OP stimulated significantly amylase release from pancreatic fragments in

vitro.

2. CCK-OP response of amylase release from pancreatic fragments was inhibited by

treatment with cadmium, especially high doses of cadmium.

3. CCK-OP response of amylase release from pancreatic fragments was inhibited

when pretreated with 10**-4 M copper chloride.

4. Lead chloride at the concentration of 10**-5 M and 10**-6 M stimulatd the

basal amylase release in vitro but CCK-OP response did not augment by lead

chloride.

5. Zinc chloride did not affect amylase release from pancreatic fragments in

vitro.

From the results mentioned above, it is suggested that CCK-OP response was

inhibited in the amylase release from pancreatic fragments pretreated with cadmium

and copper chloride.
Full Text
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1. College of Medicine (의과대학) > Others (기타) > 2. Thesis
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