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CDPKs of Cryptosporidium parvum—stage-specific expression in vitro

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Abstract

Cryptosporidium parvum is a zoonotic agent that bears a high risk for the health of particularly immunocompromised humans and animals. As currently available drugs and therapies against cryptosporidiosis do not turn out satisfactory, more intensive research on the control of this parasite is necessary. The genus Cryptosporidium is unique within the phylum Apicomplexa as its localisation is intracellular but extracytoplasmatic. Infection of host cells is initially a parasite-driven process, but the signalling events and their downstream actions within Cryptosporidium are poorly understood. Calcium-dependent protein kinases (CDPKs) are probably involved in the regulation of invasion and egress. Previously described in plants, algae and other Apicomplexa, CDPKs are not found in vertebrates. They are thus promising targets for pharmaceutical intervention. While CDPK1 is well characterised in Toxoplasma gondii (TgCDPK1) and Plasmodium falciparum (PfCDPK1), only little information exists about the expression and function of CDPK in C. parvum. Here, we describe results of the in silico analysis of seven CpCDPKs. Five CpCDPKs contain potential sites for N-myristoylation and N-palmitoylation. In a nested 3′ rapid amplification of cDNA ends (RACE)-PCR, expression of six CpCDPKs resulted in distinct bands in infected cell cultures and extracts of freshly excysted sporozoites. The length of the 3′ untranslated region (3′ UTR) is described as well. Our results indicate CDPK expression to be stage specific on the mRNA level.

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Authors and Affiliations

  1. Institute of Parasitology, University of Leipzig, Leipzig, Germany

    Manja Etzold, Matthias Lendner & Arwid Daugschies

  2. Institute for Infectious Diseases and Zoonoses, LMU Munich, Munich, Germany

    Viktor Dyachenko

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  1. Manja Etzold
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  2. Matthias Lendner
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  4. Viktor Dyachenko
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Correspondence to Manja Etzold.

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Etzold, M., Lendner, M., Daugschies, A. et al. CDPKs of Cryptosporidium parvum—stage-specific expression in vitro. Parasitol Res 113, 2525–2533 (2014). https://doi.org/10.1007/s00436-014-3902-0

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