Marcadores bioquímicos e inflamatórios em ratos submetidos ao modelo de sobrecarga de sódio pós-natal
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2021-09-17
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Universidade Federal de Goiás
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WHO data shows that the consumption of salt by the population exceeds what is indicated, which can become a public health concern, because although the ingestion of high salt levels is classically associated with the installation of hypertension, saline environment leads to an osmotic disorder which results in multiple physiological changes in the renal, central nervous and immune systems. Even studies have linked salt overload to metabolic disorders, little is known about the consequences of a hypersodium diet in the early stages of life. Experimental groups (E) of Wistar and Holtzman male rats were treated with 0.3M saline, while the control group (C) had access to water, for 60 days. During the treatment, plethysmografhy was performed for blood pressure (BP) and heart rate (HR) measurements. After a recover period, when both groups received water, biological samples were taken for analysis of hematological parameters, in blood, ad biochemical and immunological parameters, in serum and plasma. Contrary to expectations, the Holtzman rats showed no increase in BP or HR, after hypertonic saline treatment. In addition, they do not increased inflammatory cytokines, and were normal for all biochemical parameters surveyed, except for serum creatinine, with was decreased (E: 0.27 ± 0.07 vs C:0.46 ± 0.04 mg/dl, p<0.05). On the other hand, Wistar rats developed hypertension (E: 159.9 ± 5.2 mmHg vs. C: 149.7 ± 3.2 mmHg, p<0.05) and increased HR (E: 412.9 ± 7.7 bpm vs. C: 375.7 ± 12.9 bpm, p<0.05). In addition, we found differences in biochemical parameters for renal function, with elevated urea (C: 44.39 ± 0.32 mg/dl and E: 49.5 ± 0.69 mg/dl), and low creatinine (C: 0.96 ± 0.02 mg/dl and E: 068 ± 0.004 mg/dl); also differences for liver function, with increased ALT (C: 16.26 ± 0.43 mg/dl and E: 32.63 ± 0,6 mg/dl) and total and indirect bilirubin. Furthermore, components of lipidogram and serum glucose (C: 83.63 ± 0.42 mg/dl and E: 124.2 mg/dl) were elevated. Therefore, we can reinforce that there are metabolic variations between animal strains, explaining why the Holtzman rats were not sensitive to the saline protocol. In addition, changes in the biochemical parameters of Wistar rats allow us to state that sodium overload causes several metabolic diseases, with involvement of renal and liver function, besides to alterations in the metabolism of lipids and carbohydrates.
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BARROS, L. A. S. Marcadores bioquímicos e inflamatórios em ratos submetidos ao modelo de sobrecarga de sódio pós-natal. 2021. 87 f. Tese (Doutorado em Ciências Biológicas) - Universidade Federal de Goiás, Goiânia, 2021.