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Guimarães AGC, Lopes LES, Capelassi AN, Araújo ACF, Balbo SL, Blanc HNH, Freitas IN, Silva JN, Ribeiro RA, Bonfleur ML. Morphological alterations in gastrointestinal organs of western-diet obese rats submitted to vertical sleeve gastrectomy or Roux-en-Y gastric bypass. AN ACAD BRAS CIENC 2021; 93:e20200884. [PMID: 34495204 DOI: 10.1590/0001-3765202120200884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/11/2020] [Indexed: 11/22/2022] Open
Abstract
To assess the effect of vertical sleeve gastrectomy (VSG) and Roux-en-Y gastric bypass (RYGB) on the esophageal and intestinal morphology of western diet (WD)-obese rats and to characterize the stomach histopathology of WD rats submitted to VSG. Male Wistar rats received WD from 2-4 months of age, to induce obesity, before randomly submitting them to pseudo (WD-SHAM), VSG (WD-VSG) or RYGB (WD-RYGB) surgeries. Gastrointestinal histomorphometry was performed at 3-months post-surgery. The upper esophagus of VSG and RYGB rats increased luminal area, while reductions in the keratin layer of the mucosa and the tunica muscularis were observed only in the RYGB animals. In the lower esophagus, both surgeries increased keratin layer thickness, but reduced the mucosal mucus content, while RYGB increased the thickness of the tunica mucosa and muscularis. The glandular region of the stomach of WD-VSG rats exhibited hypotrophy, epithelial erosion, fibrosis and moderate inflammatory infiltration. VSG and RYGB increased the villi height in the ileum, and the thickness of the tunica muscularis in the jejunum and ileum of WD rats; furthermore, RYGB augmented the ileal villi height. Thus both approaches induced histomorphological alterations in the esophagus and intestine and VSG damaged the gastric mucosa, even over the long-term.
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Affiliation(s)
- Alana G C Guimarães
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Luana E S Lopes
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Angélica N Capelassi
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Allan C F Araújo
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Médicas e Farmacêuticas, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Sandra L Balbo
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Helene N H Blanc
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Israelle N Freitas
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Juliana N Silva
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Rosane A Ribeiro
- Universidade Estadual de Ponta Grossa (UEPG), Setor de Ciências Biológicas e da Saúde (SEBISA), Departamento de Biologia Geral, Campos Uvaranas, Avenida General Carlos Cavalcanti, 4748, 84010-330 Ponta Grossa, PR, Brazil
| | - Maria Lúcia Bonfleur
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
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Mozeš Š, Šefčíková Z, Raček Ľ. Effect of repeated fasting/refeeding on obesity development and health complications in rats arising from reduced nest. Dig Dis Sci 2015; 60:354-61. [PMID: 25150705 DOI: 10.1007/s10620-014-3340-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 08/15/2014] [Indexed: 01/30/2023]
Abstract
BACKGROUND Overnutrition during postnatal life represents a risk factor for later obesity and associated metabolic disorders. AIM We investigated the interaction between postnatal and later-life nutrition on body composition, blood pressure and the jejunal enzyme activities in male Sprague-Dawley rats. METHODS From birth, we adjusted the number of pups in the nest to 4 (small litters-SL; overfeeding) or to 10 pups (normal litters-NL; controls), and from day 50 until 70, the SL (SL-R) and NL (NL-R) rats were subjected to 1 day fasting and 1 day refeeding cycles (RFR). Their body composition was determined by magnetic resonance imaging, and enzyme activity was assayed histochemically. RESULTS At 50 and 70 days, SL rats were found to be overweight (p < 0.001), with higher adiposity (p < 0.001) and blood pressure (p < 0.01). Moreover, despite significantly decreased daily food intake during RFR (SL-R 39 %, NL-R 23 %), higher fat deposition (p < 0.001) and blood pressure (p < 0.05) was detected in SL-R rats. Activity of alkaline phosphatase (AP) functionally involved in lipid absorption was significantly higher in SL than NL rats (p < 0.001) but substantially decreased in RFR groups (SL-R p < 0.001, NL-R p < 0.01). However, despite these enzymatic adaptations to reduced food intake, the SL-R rats displayed significantly higher AP activity in comparison with NL-R rats (p < 0.01) on day 70. CONCLUSIONS Our results demonstrate that postnatal overfeeding predisposes the ontogeny of intestinal function, which may promote the probability of obesity risk. Accordingly, in these animals, efficient fat deposition and elevated blood pressure were not diminished in response to dietary restrictions in later life.
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Affiliation(s)
- Štefan Mozeš
- Institute of Animal Physiology, Slovak Academy of Sciences, Šoltésovej 4-6, 040 01, Kosice, Slovak Republic,
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