Characterization of a transplantable adenocarcinoma of the mouse colon producing cachexia in recipient animals.
MAC16 is a chemically induced, transplantable adenocarcinoma of the colon passaged in inbred NMRI mice. At small tumor burdens (less than 1% of the host weight), weight loss was observed without a reduction in food intake. As the tumor mass increased, weight loss also increased and reached 33% of host body weight in females and 20% in males when compared with the weight of age-matched controls. The reduction in host body weight was directly proportional to the tumor size and was reversible when the tumor was excised. There was a preferential loss of body fat in tumor-bearing animals with an increase in the plasma level of free fatty acids, although there was a minimal elevation of ketone bodies. Tumor growth was accompanied by progressive hypoglycemia and a reduction in the plasma insulin levels. The decrease in plasma insulin may have contributed to the catabolic effects of progressive tumor growth.
D000230:Adenocarcinoma / Q000097:blood / Q000139:chemically induced / Q000503:physiopathology*; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight; D002100:Cachexia / Q000097:blood / Q000503:physiopathology*; D003110:Colonic Neoplasms / Q000097:blood / Q000139:chemically induced / Q000503:physiopathology*; D004435:Eating; D007328:Insulin / Q000097:blood; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains
D001786:Blood Glucose; D007328:Insulin