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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 105, No. 2, 2010, pp. 174-178
Bioline Code: oc10030
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 105, No. 2, 2010, pp. 174-178

 en Anticoagulant activity in salivary gland homogenates of Thyrsopelma guianense check for this species in other resources (Diptera: Simuliidae), the primary vector of onchocerciasis in the Brazilian Amazon
Chagas, Andrezza Campos; Medeiros, Jansen Fernandes; Astolfi-Filho, Spartaco & Py-Daniel, Victor


In this study, anticoagulant activity was detected in salivary gland homogenates (SGHs) of Thyrsopelma guianense check for this species in other resources (Diptera: Simuliidae). The SGH yielded 1.07 μg ± 0.03 (n = 15) of total soluble protein per pair of glands. In addition, following SDS-PAGE (12.5% gel) and silver nitrate staining, 12 polypeptides with molecular weights ranging from 14-69 kDa were detected in all physiological ages analyzed (12 h, 24 h, 48 h and 72 h following emergence). Coagulation bioassays showed that the SGHs had activities that interacted at all levels of coagulation (the intrinsic, extrinsic and common pathways), by extending the plasma recalcification time, prothrombin time, thrombin time. This is the first report on the activity of salivary gland proteins from the main vector of onchocerciasis in Brazil. We also suggest detailed studies on the morphology and function of the salivary glands in order to understand the role of these proteins in host/vector interactions.

Black flies, salivary glands, anticoagulant, onchocerciasis

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