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| Author(s): |
Alvaro Martins Batista Junior
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Medicina (FM/SBD) |
| Defense date: | 2013-03-07 |
| Examining board members: |
Silvia Lacchini;
Dulce Elena Casarini
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| Advisor: | Silvia Lacchini |
| Abstract | |
Considering that the increase in blood pressure (BP) is an important trigger for inflammatory response and structural changes as adaptive way, the hypothesis of this study is that aerobic training (TA) may induce a beneficial glomerular remodeling and act on the expression of inflammatory cytokines. To address this hypothesis, we considered the following objectives: 1) to assess the time course of TA that leads to morphological improvement, 2) evaluate the expression of inflammatory markers in the temporal course of TA. We used male normotensive (WKY) and spontaneously hypertensive rats (SHR). The animals were divided into fourteen groups, among hypertensive and normotensive trained and sedentary. Evaluations of maximum effort test (TEM) were taken at weeks 0, 6 and 12, in order to evaluate the physical performance and permit adjustments in the protocol of TA. At weeks 0, 1, 2, 4, 8 and 12, the rats underwent femoral artery catheterization for measurement of BP and heart rate (HR). After then, the animals were euthanized and kidneys were collected for histological analysis, using the techniques of periodic acid-Schiff (APS) and picrosirius, and detection by immunohistochemistry (IHC) of inflammatory markers (IL-1? and IL-6). The results were statistically evaluated by comparing the groups by analysis of variance (ANOVA) Factorial, complemented by Bonferroni\'s post hoc test. For all analyzes was adopted significance level of p <= 0.05. Both SHR as WKY showed improvement in physical performance. At the end of the TA, only SHR decreased mean arterial pressure (MAP), when both SHR and WKY decreased HR. The glomerular morphometric analysis revealed that TA induced an increase in the glomerular area in WKY and an increase in the area of Bowman\'s capsule and of glomerulus in SHR. We also observed a decrease in the deposition of collagen fibers and proteoglycans in glomerulus, and IL-1? and IL-6 IHQ staining in glomerulus induced by TA. In conclusion, our data suggests that TA induces a beneficial glomerular remodeling and a reduction in the glomerular expression of IL-1? and IL-6 in hypertensive animals, which is possibly associated with the reduction observed in MAP (AU) | |
| FAPESP's process: | 10/02741-0 - The effect of physical exercise on expression of renal inflammatory markers in hypertensive rats . |
| Grantee: | Alvaro Martins Batista Junior |
| Support Opportunities: | Scholarships in Brazil - Master |