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  • Title: [Energy metabolism and experimental malignant tumor development].
    Author: Lima-Gonçalves E, Waitzberg DL, Yamada TM, Auricchio MT, Weg R.
    Journal: Rev Hosp Clin Fac Med Sao Paulo; 1991; 46(5):207-14. PubMed ID: 1843722.
    Abstract:
    Weight loss in cancer can be attributed to anorexia and/or increased energy expenditure. In order to understand the contribution of these variables, 36 Wistar rats fed regular diet were randomly distributed in 3 groups: T (12) bearing Walker 256 carcinosarcoma; PF (12) pair fed with T group and C (12) as control group; another group--D (12)--in which rats were fed with low protein (1%) diet. Caloric intake, body and tumor weight were measured daily. Indirect calorimetry was done sequentially each 4 days. After 2 weeks of tumor growth there was significant reduction of caloric intake and carcass weight in T group compared to those of C group. There was no difference in carcass weight between T and PF group. After 3 weeks it was significantly reduced in T group (55.7 Kcal/m2/h against 75.0 of N and 65.1 of PF group). Walker 256 carcinosarcoma is an hypometabolic tumor and the host weight loss associated to its development is due to anorexia.
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