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[Effects of neurotensin on the development of suckling rats with intestinal resection].

Massive intestinal resection produces malabsorption which, in the suckling rat, reduces growth. Our aim was to determine whether the proliferative action of neurotensin, can reduce the negative effects on growth induced by bowel resection. Fifteen days old suckling Wistar rats were used. Twenty rats underwent 90% midgut resection and twelve were used as controls. Half the animals were treated with neurotensin (600 micrograms/kg-day) until sacrifice 30 days later. Body and bone weight were measured and mucosal samples obtained. All resected animals lost body weight and bone weight. Neurotensin treatment reduced femur weight loss. After bowel resection, significant trophic effects were observed at mucosal level (crypt and villous size) but only in the jejunum of resected animals neurotensin treatment had a trophic effect. In conclusion, neurotensin favors intestinal adaptation after resection without improving mid-term growth in the suckling rat.