Subcellular localization and functional characterization of Nc-p43, a major Neospora caninum tachyzoite surface protein.

Abstract:

:Neospora caninum is a recently identified coccidian parasite which shares many features with, but is clearly distinct from, Toxoplasma gondii. N. caninum tachyzoites infect a wide range of mammalian cells both in vivo and in vitro. The mechanisms by which infection is achieved are largely unknown. Recent evidence has suggested that a receptor-ligand system in which one or several host cell receptors bind to one or several parasite ligands is involved. Parasite cell surface-associated molecules such as the recently identified Nc-p43 antigen are prime suspects for being implicated in this physical interaction. In this study it is shown that invasion of Vero cell monolayers by N. caninum tachyzoites in vitro is impaired on incubation of parasites with subagglutinating amounts of affinity-purified antibodies directed against Nc-p43. Postembedding immunogold labeling with anti-Nc-p43 antibodies demonstrated that Nc-p43 is localized not only on the parasite cell surface but also within dense granules and rhoptries. The fate of Nc-p43 during intracellular proliferation of N. caninum tachyzoites and subsequent maturation of the parasitophorous vacuole was also studied.

journal_name

Infect Immun

journal_title

Infection and immunity

authors

Hemphill A

doi

10.1128/IAI.64.10.4279-4287.1996

subject

Has Abstract

pub_date

1996-10-01 00:00:00

pages

4279-87

issue

10

eissn

0019-9567

issn

1098-5522

journal_volume

64

pub_type

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