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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Characterization of a defensin of the tick \kur{Dermacentor marginatus}
 LEŠTINOVÁ, Kateřina
Antimicrobial peptides (AMPs), as a part of innate immune system of ticks and other living organisms, are able to eliminate pathogens. In ticks the most important group of AMPs is defensin family. In this work, defensin from the tick D. marginatus was studied. The defensin gene was isolated from D. marginatus fed females. Using RT-PCR the gene expression was detected in salivary glands and mitgut. Recombinant protein was expressed in the procaryotic expression system, purified and tested for its antimicrobial activity. Specific polyclonal rabbit antibodies (anti DR IgG) were prepared and tested for their specifity and sensitivity.
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Isolation of the antimicrobial peptide gene (defensin) from the hard tick \kur{Ixodes ricinus}, challenged by the pathogen infection
 SKLADANÁ, Veronika
Antimicrobial peptides are major components of the innate immune response of epithelial cells. In hematophagous organisms, which acts as vectors of parasitic diseases, in particular Lyme borreliosis, the gut pathogen induce the expression of defensin, that provide the first barier of host defence. This raises the posibility that defensin may play a key role in the development of parasitic infection. The gene expressed in midgut was isolated from cDNA of the hard tick, Ixodes ricinus. The gene is coding the protein, that is produced and secreted during tick infection, and is known as defensin. Expression of the gene for defensin (224 bp) was induced by the pathogen. The gene was cloned into bacterial expression system.
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