[Effect of ursodeoxycholic acid in an experimental colon cancer model].
OBJECTIVE
The present study was designed to examine the effect of ursodeoxycholic acid as chemoprotective agent in experimental colon carcinogenesis in rats.


METHODS
One hundred and ten 10-week-old, Sprague-Dawley rats were divided into five groups: group A (20), no treatment. Group B (20), receiving daily both ursodeoxycholic acid (UDCA) 4 mg/kg of body weight and ethanol 1.23 g/kg of body weight added to the drinking water from the beginning of the study through 24 weeks. Group C (30), receiving 18 weekly doses of dimethylhydrazine (DMH) 21 mg/kg of body weight subcutaneously from the beginning of the study, with the same doses of UDCA and ethanol as in group B. Group D (20), ethylen-diamin-tetracetic acid solution alone for 18 weeks. Group E (20), receiving the same doses of ethanol plus DMH injections as in group C. All experimental animals were sacrificed after 25-27 weeks.


RESULTS
No tumors developed in dimethylhydrazine-free groups. No significant differences in number of tumor-free animals, number of tumors per rat, and macro-microscopic tumor findings were seen between animals in group C and animals in group E.


CONCLUSIONS
We concluded that such an ursodeoxycholic acid supplementation did not modify colorectal carcinogenesis using a dynamic DMH-induced model in rats.
Pérez-Holanda
S
S
Servico de Cirugía, Hospital Valle del Nalón, Langreo, Asturias, Departamento de Medicina, Facultad de Medicina, Universidad de Oviedo, Asturias. sergio.perez-holanda@sespa.pincast.es
Rodrigo
L
L
Viñas Salas
J
J
Piñol Felis
C
C
D000818:Animals; D002756:Cholagogues and Choleretics / Q000627:therapeutic use*; D003110:Colonic Neoplasms / Q000517:prevention & control*; D004195:Disease Models, Animal; D005260:Female; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D014580:Ursodeoxycholic Acid / Q000627:therapeutic use*
D002756:Cholagogues and Choleretics; D014580:Ursodeoxycholic Acid