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논문 기본 정보

자료유형
학술저널
저자정보
정원근 (서울대학교 의과대학 생리학교실) 이상돈 (서울대학교 의과대학 생리학교실)
저널정보
대한생리학회 대한생리학회지 대한생리학회지 제4권 제2호
발행연도
1970.1
수록면
25 - 31 (7page)

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Tissue homogenates of Ehrlich ascites tumor tissues and several normal tissue of mice were incubated separately in medium maintaining $C^{14}$_acetate concentrations of 5, 10, 20, 30, 40, 50 and 60 mg%, in order to determine maximum oxidative rates of acetate. In every incubation experiments, respiratory $CO_2$ samples rapped by alkaline which was placed in the center well of the incubation blask were analyzed for total $CO_2$ Production rates and their radoactivies. The fractions of $CO_2$ from medium acetate to total $CO_2$ production rate were obtained with relative specific activities (RSA) which were calculated by ratio between specific activities (SA) of $CO_2$ and medium $CO^{14}$_acetate and $CO_2$ production rates from medium acetate were calculated from RSA and total $CO_2$ production rates. Maximum plateau values of oxidative rates described above were determined at incubation experiments of various concentrations of medium acetate and compared the oxidative rates of acetate of tumor with those of normal tissues such as kidney, brain and liver. Maximum plateau values of total $CO_{2}$ Production rates were obtained at acetate concentration of 20 mg% and represent $25.0{\pm}0.54\;{\mu}M/hr/gm$ in the brain, $16.3{\pm}2.5$ in the kidney, $9.1{\pm}1.78$ in the liver and $11.5{\pm}3.2\;{\mu}M/hr/gm$ in the ascites tuners. Substancial $CO_2$ yield was observed in the tumor tissues as in the normal tissues. On the other hand, plateau values of RSA were $25.7{\pm}1.04%$ in thee brain, $9.1{\pm}0.72%$ in the kidney, $2.5{\pm}0.73%$ in the liver and $0.51{\pm}0.12%$ in the tumor tissues. $CO_2$ yields from the medium acetate, were 4.19 in the kidney, 2.28 in the brain, 0.228 in the liter and $0.059\;{\mu}M/hr/gm$ in the tumor tissue. These show wide range even in the normal tissue but remarkable decrease in the tumor tissue. This fact means that further oxidation of acetate was inhibited remarkably in the tumor tissue.

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