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Vacuolating cytotoxin A (VacA) - A multi-talented pore-forming toxin from Helicobacter pylori.
Junaid, Muhammad; Linn, Aung Khine; Javadi, Mohammad Bagher; Al-Gubare, Sarbast; Ali, Niaz; Katzenmeier, Gerd.
Afiliación
  • Junaid M; Department of Pharmacy, Division of Pharmacology, University of Malakand, Khyber Pakhtunkhwa 18550, Pakistan; Bacterial Toxin Research Cluster, Institute of Molecular Biosciences, Mahidol University, Nakornpathom 73170, Thailand. Electronic address: juniphdr@gmail.com.
  • Linn AK; Bacterial Toxin Research Cluster, Institute of Molecular Biosciences, Mahidol University, Nakornpathom 73170, Thailand. Electronic address: aung.k.lynn@gmail.com.
  • Javadi MB; Bacterial Toxin Research Cluster, Institute of Molecular Biosciences, Mahidol University, Nakornpathom 73170, Thailand. Electronic address: mohammad.jav@mahidol.ac.th.
  • Al-Gubare S; Bacterial Toxin Research Cluster, Institute of Molecular Biosciences, Mahidol University, Nakornpathom 73170, Thailand. Electronic address: sarbastem@yahoo.com.
  • Ali N; Department of Basic Medical Sciences, Khyber Medical University, Peshawar 25000, Pakistan. Electronic address: niazpharmacist@yahoo.com.
  • Katzenmeier G; Bacterial Toxin Research Cluster, Institute of Molecular Biosciences, Mahidol University, Nakornpathom 73170, Thailand. Electronic address: katzenmeier.ger@mahidol.ac.th.
Toxicon ; 118: 27-35, 2016 Aug.
Article en En | MEDLINE | ID: mdl-27105670
Helicobacter pylori is associated with severe and chronic diseases of the stomach and duodenum such as peptic ulcer, non-cardial adenocarcinoma and gastric lymphoma, making Helicobacter pylori the only bacterial pathogen which is known to cause cancer. The worldwide rate of incidence for these diseases is extremely high and it is estimated that about half of the world's population is infected with H. pylori. Among the bacterial virulence factors is the vacuolating cytotoxin A (VacA), which represents an important determinant of pathogenicity. Intensive characterization of VacA over the past years has provided insight into an ample variety of mechanisms contributing to host-pathogen interactions. The toxin is considered as an important target for ongoing research for several reasons: i) VacA displays unique features and structural properties and its mechanism of action is unrelated to any other known bacterial toxin; ii) the toxin is involved in disease progress and colonization by H. pylori of the stomach; iii) VacA is a potential and promising candidate for the inclusion as antigen in a vaccine directed against H. pylori and iv) the vacA gene is characterized by a high allelic diversity, and allelic variants contribute differently to the pathogenicity of H. pylori. Despite the accumulation of substantial data related to VacA over the past years, several aspects of VacA-related activity have been characterized only to a limited extent. The biologically most significant effect of VacA activity on host cells is the formation of membrane pores and the induction of vacuole formation. This review discusses recent findings and advances on structure-function relations of the H. pylori VacA toxin, in particular with a view to membrane channel formation, oligomerization, receptor binding and apoptosis.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas Bacterianas / Toxinas Bacterianas / Modelos Moleculares / Membrana Celular / Helicobacter pylori / Apoptosis Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: Toxicon Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas Bacterianas / Toxinas Bacterianas / Modelos Moleculares / Membrana Celular / Helicobacter pylori / Apoptosis Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: Toxicon Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido