Consulta: creatorFacets:"Alvares,E.P."
Registros recuperados: 2
Data/hora: 17/06/2024 15:43:53

Cell proliferation and migration in the jejunum of suckling rats submitted to progressive fasting
Provedor de dados: 56
Autores: Gomes,J.R.; Alvares,E.P.
Cell proliferation and migration in the intestinal crypts, and cell migration in the villus are controlled by different mechanisms in adult rats. In the present study, weanling rats and fasting rats were used to quantitatively study the correlation of cell cycle parameters and epithelial cell migration in crypts and intestinal villi. Eighteen-day-old rats received a single injection of tritiated thymidine [3H]TdR (23:00 h); half of the pups were submitted to fasting 5 h earlier. Cell proliferation was determined in radioautographs of jejunal crypts, on the basis of the labeling indices (LI) taken 1, 8, 13 and 19 h after [3H]TdR. The results showed that the labeling index did not differ 1 h or 19 h after [3H]TdR between the fed (38.7% or 48%) and fasting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cell proliferation; Cell migration; Crypt and villus intestine; Weanling rats; Radioautography.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000200011

Feeding manipulation elicits different proliferative responses in the gastrointestinal tract of suckling and weanling rats
Provedor de dados: 56
Autores: Palanch,A.C.; Alvares,E.P.
Food deprivation has been found to stimulate cell proliferation in the gastric mucosa of suckling rats, whereas the weanling period has been reported to be unresponsive in terms of proliferative activity. In the present study we analyze regional differences in the effect of milk or food deprivation on cell proliferation of the epithelia of the esophagus and of five segments of small intestine in suckling, weanling and newly weaned Wistar rats of both sexes. DNA synthesis was determined using tritiated thymidine to obtain labeling indices (LI); crypt depth and villus height were also determined. Milk deprivation decreased LI by 50% in the esophagus (from 15 to 8.35%) and small intestine (from 40 to 20%) of 14-day-old rats. In 18-day-old rats, milk and food...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Developing rats; Milk deprivation; Cell proliferation; Crypt and villus size; Esophagus; Small intestine.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400015