有哪些信誉好的足球投注网站hyaluronidase of bloodsucking insects and its enhancing effect on leishmania infection in mice透明质酸酶的吸血昆虫及其提高利什曼虫感染的小鼠的影响.pdfVIP
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hyaluronidase of bloodsucking insects and its enhancing effect on leishmania infection in mice透明质酸酶的吸血昆虫及其提高利什曼虫感染的小鼠的影响
Hyaluronidase of Bloodsucking Insects and Its Enhancing Effect on Leishmania Infection in Mice 1 1 2 1 1 Vera Volfova , Jitka Hostomska , Martin Cerny , Jan Votypka , Petr Volf * 1 Department of Parasitology, Faculty of Science, Charles University in Prague, Czech Republic, 2 Department of Ecology, Faculty of Science, Charles University in Prague, Czech Republic Abstract Background: Salivary hyaluronidases have been described in a few bloodsucking arthropods. However, very little is known about the presence of this enzyme in various bloodsucking insects and no data are available on its effect on transmitted microorganisms. Here, we studied hyaluronidase activity in thirteen bloodsucking insects belonging to four different orders. In addition, we assessed the effect of hyaluronidase coinoculation on the outcome of Leishmania major infection in BALB/c mice. Principal Findings: High hyaluronidase activity was detected in several Diptera tested, namely deer fly Chrysops viduatus, blackflies Odagmia ornata and Eusimilium latipes, mosquito Culex quinquefasciatus, biting midge Culicoides kibunensis and sand fly Phlebotomus papatasi. Lower activity was detected in cat flea Ctenocephalides felis. No activity was found in kissing bug Rhodnius prolixus, mosquitoes Anopheles stephensi and Aedes aegypti, tse-tse fly Glossina fuscipes, stable fly Stomoxys calcitrans and human louse Pediculus humanus. Hyaluronidases of different insects vary substantially in their molecular weight, the structure of the molecule and the sensitivity to reducing conditions or sodium dodecyl sulphate. Hyaluronidase exacerbates skin lesions caused by Leishmania major; more severe lesions developed in mice where L. major promastigotes were coinjected with hyaluronidase. Conclusions:
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