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| Author(s): |
Gisele Aparecida Dionísio Lopes
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Botucatu. 2015-03-03. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Medicina. Botucatu |
| Defense date: | 2013-02-26 |
| Advisor: | Maria Aparecida Marchesan Rodrigues; Luis Fernando Barbisan |
| Abstract | |
We examined the effects of a Western Style Diet (WD), high in fat (corn oil) (20%) and low in micronutrients [i.e.; folic acid (1 mg/g), choline (0.12%) and fiber (2%)] during pregnancy, lactation and in prepubertal stage to examine the susceptibility to colon carcinogenesis induced by dimethylhydrazine (DMH) in male Sprague-Dawley (SD) rats as later adults. We also evaluated whether WD reintroduction during adulthood can modify susceptibility to colon carcinogenesis. Pregnant SD rats received one of two diets AIN-93G or WD at gestational day 12 (GD 12). F1 male pups were weaned (21d) and fed the same AIN- 93G or WD diets from their dams until postnatal day 50 (PND 50). At this point, they were given four subcutaneous injections of carcinogen DMH (40 mg/body weight) and were shared the following diets/group: group I (AIN-93/DMH/AIN-93) a lifetime control diet-fed group (GD 12 until postnatal day - PND 370), group II (AIN-93/DMH/WD) received WD only in adulthood (at PND 260), group III (WD/DMH/AIN-93) received WD during pregnancy from dams until prepubertal stage (GD 12 - PND 50) and group IV (WD/DMH/WD), received WD since pregnancy from dams (GD 12) until prepubertal stage (PND 50) and was reintroduced to WD during adulthood (PND 260). All groups were euthanized at the end of 50th week (PND 370). The colon was removed and the aberrant crypt foci (ACF) were stereoscopically and histologically scored for number, distribution and multiplicity. Neoplastic lesions and serum insulin and leptin concentrations were analysed at necropsy. ACF multiplicity and dysplastic lesions were significantly higher in the group fed WD during pregnancy until prepubertal stage (group III) than control group (group I). In the group III, the number of adenocarcinomas were higher than control (group I). In the group fed WD only in adulthood (group II), ACF multiplicity was significantly higher than in the control (group I). The group ... (AU) | |
| FAPESP's process: | 10/18827-0 - Long term effects of the Western style dietary pattern given during pregnancy and early life on colon carcinogenesis induced by dimethylhydrazine in the rat |
| Grantee: | Gisele Aparecida Dionísio Lopes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |