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Genotyping of polymorphic effectors of Toxoplasma gondii isolates from China.
Cheng, Weisheng; Wang, Cong; Xu, Ting; Liu, Fang; Pappoe, Faustina; Luo, Qingli; Xu, Yuanhong; Lu, Fangli; Shen, Jilong.
Afiliación
  • Cheng W; Department of Microbiology and Parasitology, Anhui Provincial Laboratory of Parasitology and the Key Laboratory of Zoonoses, School of Basic Medicine, Anhui Medical University, Hefei, 230022, China.
  • Wang C; Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.
  • Xu T; Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.
  • Liu F; Department of Microbiology and Parasitology, Anhui Provincial Laboratory of Parasitology and the Key Laboratory of Zoonoses, School of Basic Medicine, Anhui Medical University, Hefei, 230022, China.
  • Pappoe F; Department of Microbiology and Parasitology, Anhui Provincial Laboratory of Parasitology and the Key Laboratory of Zoonoses, School of Basic Medicine, Anhui Medical University, Hefei, 230022, China.
  • Luo Q; Department of Microbiology and Parasitology, Anhui Provincial Laboratory of Parasitology and the Key Laboratory of Zoonoses, School of Basic Medicine, Anhui Medical University, Hefei, 230022, China.
  • Xu Y; Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.
  • Lu F; Department of Microbiology and Parasitology, Anhui Provincial Laboratory of Parasitology and the Key Laboratory of Zoonoses, School of Basic Medicine, Anhui Medical University, Hefei, 230022, China.
  • Shen J; Department of Microbiology and Immunology, School of Medical Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana.
Parasit Vectors ; 10(1): 580, 2017 Nov 21.
Article en En | MEDLINE | ID: mdl-29157292
BACKGROUND: Toxoplasma gondii is an opportunistic protozoan apicomplexan and obligate intracellular parasite that infects a wide range of animals and humans. Rhoptry proteins 5 (ROP5), ROP16, ROP18 and dense granules 15 (GRA15) are the important effectors secreted by T. gondii which link to the strain virulence for mice and modulate the host's response to the parasite. Little has been known about these molecules as well as GRA3 in type Chinese 1 strains that show polymorphism among strains of archetypical genotypes. This study examined the genetic diversity of these effectors and its correlated virulence in mice among T. gondii isolates from China. RESULTS: Twenty-one isolates from stray cats were detected, of which 15 belong to Chinese 1, and 6 to ToxoDB #205. Wh6 isolate, a Chinese 1 strain, has an avirulent phenotype. PCR-RFLP results of ROP5 and ROP18 presented few variations among the strains. Genotyping of GRA15 and ROP16 revealed that all the strains belong to type II allele except Xz7 which carries type I allele. ROP16 amino acid alignment at 503 locus demonstrated that 17 isolates are featured as type I or type III (ROP16I/III), and the other 4 as type II (ROP16II). The strains investigated may be divided into four groups based on GRA3 amino acid alignment, and all isolates of type Chinese 1 belong to the µ-1 allele except Wh6 which is identical to type II strain. CONCLUSIONS: PCR-RFLP and sequence alignment analyses of ROP5, ROP16, ROP18, GRA3, and GRA15 in T. gondii revealed that strains with the same genotype may have variations in some of their key genes. GRA3 variation exhibited by Wh6 strain may be associated with the difference in phenotype and pathogenesis.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Toxoplasma / Variación Genética Límite: Animals / Humans País/Región como asunto: Asia Idioma: En Revista: Parasit Vectors Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Toxoplasma / Variación Genética Límite: Animals / Humans País/Región como asunto: Asia Idioma: En Revista: Parasit Vectors Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido