Skip to main content
Article thumbnail
Location of Repository

A study of the effects of pinealectomy on intestinal cell proliferation in infant newborn rats

By Dalio Marcelo Belini, Haikel Júnior Luis Fernando, Dalio Renato Belini, Pinto André Pera Marques, Silva Júlio César Fernandes da, Vespúcio Marcelo Vinícius Oliveira, Guimarães Marco Aurélio and Garcia Sérgio Britto

Abstract

PURPOSE: Study the proliferation rate of jejunum and large intestine crypt epithelial cells, in rats pinealectomized immediately after borning. METHODS: Twenty-four male Wistar rats were distributed into two groups: Acute group (n=12) and Chronic group (n=12). Six animals of each group were operated for removal of the pineal gland (pinealectomy-PnX), and other six were controls (sham pinealectomy-C). Animals from acute and chronic group were sacrificed 15 and 90 days after the surgery, respectively. RESULTS: In acute group, pinealectomy of new-born rats has not caused significant alteration in cell proliferation (PnX=58,77?1,77 and C=60,88?1,10 in the descending colon/ PnX=31,56?0,45 and C=31,73?0,47 in the proximal jejunum) and in crypt cell population (PnX=24,92?4,82 and C=23,60?2,48 in the descending colon/ PnX=39,92?3,49 and C=44,32?5,56 in the proximal jejunum). However, in chronic group there was an uprising crypt cell production per crypt in the proximal jejunum (PnX=57,54?2,19 and C=47,19?7,3)and in the descending colon (PnX=37,78?2,22 and C=17,92?2,28). CONCLUSION: As the increase of intestinal crypts epithelial cells in chronic group is a carcinogenesis predetermining factor, the understanding of the interaction between pineal gland and this event has great importance

Topics: Pineal Gland, Intestine, Small, Instestine, Large, Infant, Newborn, Rats, Surgery, RD1-811, Medicine, R, DOAJ:Surgery, DOAJ:Medicine (General), DOAJ:Health Sciences
Publisher: Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia
Year: 2006
OAI identifier: oai:doaj.org/article:21d51dbc0bc4432a86ed7aa29825307d
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doaj.org/toc/1678-2674 (external link)
  • https://doaj.org/toc/0102-8650 (external link)
  • http://www.scielo.br/scielo.ph... (external link)
  • https://doaj.org/article/21d51... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.