Efeitos do tratamento com a Hev b 13, extraída do látex natural de Hevea brasilienis, na resposta inflamatória de ratos com sepse

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Universidade Federal de Goiás


Sepsis is an infectious disease characterized by severe systemic inflammatory response. Rupture of the complex equilibrium between inflammatory mediators in the acute phase of the disease leads to exacerbated production of proinflammatory cytokines, with consequent hypotension, increased capillary permeability, organ lesions and death. Recent research using the Hev b 13 protein derived from natural Hevea brasiliensis (rubber tree) latex has demonstrated important anti-inflammatory and immunomodulating effects. The aim of this study was to investigate the effects of Hev b 13 on the systemic and tissue inflammatory response of septic rats. To that end, cecal ligation and puncture (CLP) was performed on male Wistar rats and after six hours, the animals were randomized into groups and subcutaneously treated with doses of 0.5; 2.0 and 3.0 mg/Kg of Hev b 13. Next, the animals were subdivided into three different times (1, 6 and 24 hours after treatment) for blood sample collection and euthanasia with removal of the lungs and liver. Leukocytes, tumor necrosis factor- alpha (TNF-α) plasma and tissue levels, interleukin (IL)-6, IL-10, and IL-4 and histological slides were analyzed. The results demonstrated that treatment with the Hev b 13 protein prompted a significant decline in total and differential leukocytes, as well as the production of TNF-α and IL-6, associated with an increase in IL-10 and IL-4 in plasma and lung tissue. Moreover, it restricted the morphopathological changes found in the lungs, including neutrophil infiltration, swelling and alveolar thickening. In the liver, it increased IL-10 production and inhibited TNF-α and IL-6, in addition to reducing hemorrhage, sinusoidal inflammatory infiltrates and hydropic degeneration in histological assessment. We conclude that Hev b 13 displays anti-inflammatory and immunomodulating activity capable of attenuating lung and liver lesions in rats during acute sepsis, with potential for clinical applications.



ARAÚJO, L. A. Efeitos do tratamento com a Hev b 13, extraída do látex natural de Hevea brasilienis, na resposta inflamatória de ratos com sepse. 2017. 86 f. Tese (Doutorado em Biotecnologia e Biodiversidade em Rede Pró-Centro-Oeste) - Universidade Federal de Goiás, Goiânia, 2017