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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Inhibitor of cysteine peptidase does not influence the development of Leishmania mexicana in Lutzomyia longipalpis

Jecna, Lucie and Svarovska, Anna and Besteiro, Sébastien and Mottram, Jeremy C. and Coombs, Graham H. and Volf, Petr (2009) Inhibitor of cysteine peptidase does not influence the development of Leishmania mexicana in Lutzomyia longipalpis. Journal of Entomology, 46 (3). pp. 605-609. ISSN 0022-2585

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Abstract

It has been proposed that the natural cysteine peptidase inhibitor ICP of Leishmania mexicana protects the protozoan parasite from insect host proteolytic enzymes, thereby promoting survival. To test this hypothesis, L. mexicana mutants deficient in ICP were evaluated for their ability to develop in the sand fly Lutzomyia longipalpis. No significant differences were found between the wild-type parasites, two independently derived ICP-deficient mutants, or mutants overexpressing ICP; all lines developed similarly in the sand fly midgut and produced heavy late-stage infections. In addition, recombinant L. mexicana ICP did not inhibit peptidase activity of the midgut extracts in vitro. We conclude that ICP has no major role in promoting survival of L. mexicana in the vectorial part of its life cycle in L. longipalpis.