| Full text | |
| Author(s): |
Bertaglia Pereira, Joice Naiara
[1]
;
Murata, Gilson Masahiro
[2]
;
Sato, Fabio Takeo
[3]
;
Marosti, Aline Rosa
[4]
;
de Oliveira Carvalho, Carla Roberta
[5]
;
Curi, Rui
[5, 6, 1]
Total Authors: 6
|
| Affiliation: | [1] Cruzeiro do Sul Univ, Interdisciplinary Postgrad Program Hlth Sci, Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Med, Dept Med Clin, Sao Paulo - Brazil
[3] Univ Estadual Campinas, Inst Biol, Dept Genet Evolut Microbiol & Immunol, Campinas - Brazil
[4] Univ Ctr Maringa, Dept Med, Maringa, Parana - Brazil
[5] Univ Sao Paulo, Inst Biomed Sci, Dept Physiol & Biophys, Sao Paulo - Brazil
[6] Butantan Inst, Sao Paulo - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | PHYSIOLOGICAL REPORTS; v. 9, n. 3 FEB 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Background: Obesity is associated with the development of insulin resistance (IR) and type-2 diabetes mellitus (T2DM); however, not all patients with T2DM are obese. The Goto-Kakizaki (GK) rat is an experimental model of spontaneous and non-obese T2DM. There is evidence that the intestine contributes to IR development in GK animals. This information prompted us to investigate small intestine remodeling in this animal model. Methods: Four-month-old male Wistar (control) and GK rats were utilized for the present study. After removing the small intestine, the duodenum, proximal jejunum, and distal ileum were separated. We then measured villi and muscular and mucosa layer histomorphometry, goblet cells abundance, total myenteric and submucosal neuron populations, and inflammatory marker expression in the small intestinal segments and intestinal transit of both groups of animals. Key Results: We found that the GK rats exhibited decreased intestinal area (p < 0.0001), decreased crypt depth in the duodenum (p = 0.01) and ileum (p < 0.0001), increased crypt depth in the jejunum (p < 0.0001), longer villi in the jejunum and ileum (p < 0.0001), thicker villi in the duodenum (p < 0.01) and ileum (p < 0.0001), thicker muscular layers in the duodenum, jejunum, and ileum (p < 0.0001), increased IL-1 beta concentrations in the duodenum and jejunum (p < 0.05), and increased concentrations of NF-kappa B p65 in the duodenum (p < 0.01), jejunum and ileum (p < 0.05). We observed high IL-1 beta reactivity in the muscle layer, myenteric neurons, and glial cells of the experimental group. GK rats also exhibited a significant reduction in submucosal neuron density in the jejunum and ileum, ganglionic hypertrophy in all intestinal segments studied (p < 0.0001), and a slower intestinal transit (about 25%) compared to controls. Conclusions: The development of IR and T2DM in GK rats is associated with small intestine remodeling that includes marked alterations in small intestine morphology, local inflammation, and reduced intestinal transit. (AU) | |
| FAPESP's process: | 18/09868-7 - Cellular and molecular mechanisms of insulin resistance and inflammation in obese Wistar rats and lean Goto-Kakizaki rats: causes and associations with diet and physical exercise |
| Grantee: | Rui Curi |
| Support Opportunities: | Research Projects - Thematic Grants |