O cálcio exógeno como biomarcador do uso de via metabólica alternativa por biomphalaria spp (mollusca, planorbidae)
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Data
2019-12
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Editor
Edson Ferreira Duarte
Resumo
Snails of the genus Biomphalaria are hosts of the parasite Schistosoma mansoni, as well as
bioindicators of environmental quality. These snails use carbohydrates as the primary source of
energy and amino acids in the "new" synthesis of glucose by gluconeogenesis. The concentration of
exogenous Ca2+ affects the energetic metabolism of these snails. This study evaluated the use of an
alternative metabolic pathway by Biomphalaria tenagophila and B. glabrata exposed to 20, 40, 60, 80
and 100 mg/L CaCO3 for 30 days. From each group, samples of hemolymph of fifteen snails from
each group were used assess the level of total protein, urea, uric acid and creatinine by
spectrophotometry. In general, there was an increase of total proteins and reduction of urea, in both
species, exposed to the higher concentrations of CaCO3, when compared to the control. Uric acid also
increased for both species in the highest concentrations of CaCO3. Higher creatinine values were
observed in B. tenagophila and B. glabrata exposed, respectively, to 20 and 40 mg CaCO3. The use of
proteins as energetic substrate was observed mainly in the exposure to 20 mg of CaCO3, besides
particularities in the regulation of physiological mechanisms were observed in these hosts of S.
mansoni.
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Palavras-chave
Carbonato de cálcio, Moluscos hospedeiros da esquistossomose, Produtos nitrogenados, Vias metabólicas alternativas
Citação
SILVA, Luciana Damacena; ALVES, Sueli Martins de Freitas; LEICHTWEIS, Kamila Souto; SANTOS, Daniela Braz dos; CASTRO, Ana Maria de; SILVA, Clélia Christina Mello; MACHADO, Karine Borges; REZENDE, Hânstter Hallison Alves; BEZERRA, José Clecildo Barreto. O cálcio exógeno como biomarcador do uso de via metabólica alternativa por biomphalaria spp (mollusca, planorbidae). Revista de Biologia Neotropical, Goiânia, v. 16, n. 2, p. 61-69, jul./dez. 2019. Disponível em: https://www.revistas.ufg.br/RBN/article/view/53324.