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  • Author: Wiesława Jankowska x
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Cezary Sempruch, Weronika Marczuk, Bogumił Leszczyński, Agnieszka Kozak, Wiesława Zawadzka, Agnieszka Klewek and Jolanta Jankowska

Abstract

The study examined changes in lysine decarboxylase (LDC), ornithine decarboxylase (ODC) and tyrosine decarboxylase (TyDC) activity in tissues of pea (Pisum sativum L.) infested by the pea aphid (Acyrthosiphon pisum Harris). The aphid induced increased ODC activity after one day and at two weeks. The effect was clearly systemic. TyDC activity increased after one day and at one week at feeding sites (aerial parts), while LDC activity increased only after one day of infestation and then decreased. Attack by aphids also affected enzyme activity in root tissues not directly damaged by the herbivores. The mechanisms of the response induced by pea aphid infestation in pea are discussed.

Open access

Agnieszka Wojtkowiak-Giera, Elżbieta Wandurska-Nowak, Monika Derda, Wiesława Jankowska, Paweł P. Jagodziński and Edward Hadaś

Abstract

Introduction

Toll-like receptors (TLRs) play a key role in the rapid activation of the innate immune response to a variety of pathogens. The aim of this study was to evaluate the effect of Trichinella spiralis infection on the level of expression of the tlr4 gene in mouse intestines during the intestinal phase of experimental trichinellosis.

Material and Methods

The experimental material consisted of the small and large intestines of BALB/c mice infected with Trichinella spiralis sampled at 4, 8, and 16 days post infection (dpi).

Results

A statistically significant increase was demonstrated in the tlr4 mRNA level isolated from the infected mice jejunum at 4, 8, and 16 dpi over the uninfected control. Moreover, at 4, 8, and 16 dpi in the jejunum of infected mice, a strong positive reaction for the presence of TLR4 protein compared with that of uninfected mice was observed.

Conclusion

Infection with T. spiralis changes the expression of the tlr4 gene in the small intestine of the mouse host.