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Viroporins and inflammasomes: A key to understand virus-induced inflammation.
Farag, N S; Breitinger, U; Breitinger, H G; El Azizi, M A.
  • Farag NS; Department of Microbiology and Immunology, German University inCairo, New Cairo, Egypt. Electronic address: noha.samir@guc.edu.eg.
  • Breitinger U; Department of Biochemistry, German University in Cairo, New Cairo, Egypt.
  • Breitinger HG; Department of Biochemistry, German University in Cairo, New Cairo, Egypt.
  • El Azizi MA; Department of Microbiology and Immunology, German University inCairo, New Cairo, Egypt.
Int J Biochem Cell Biol ; 122: 105738, 2020 05.
Article in English | MEDLINE | ID: covidwho-824867
ABSTRACT
Viroporins are virus encoded proteins that alter membrane permeability and can trigger subsequent cellular signals. Oligomerization of viroporin subunits results in formation of a hydrophilic pore which facilitates ion transport across host cell membranes. These viral channel proteins may be involved in different stages of the virus infection cycle. Inflammasomes are large multimolecular complexes best recognized for their ability to control activation of caspase-1, which in turn regulates the maturation of interleukin-1 ß (IL-1ß) and interleukin 18 (IL-18). IL-1ß was originally identified as a pro-inflammatory cytokine able to induce both local and systemic inflammation and a febrile reaction in response to infection or injury. Excessive production of IL-1ß is associated with autoimmune and inflammatory diseases. Microbial derivatives, bacterial pore-forming toxins, extracellular ATP and other pathogen-associated molecular patterns trigger activation of NLRP3 inflammasomes. Recent studies have reported that viroporin activity is capable of inducing inflammasome activity and production of IL-1ß, where NLRP3 is shown to be regulated by fluxes of K+, H+ and Ca2+ in addition to reactive oxygen species, autophagy and endoplasmic reticulum stress. The aim of this review is to present an overview of the key findings on viroporin activity with special emphasis on their role in virus immunity and as possible activators of inflammasomes.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Viral Proteins / Virus Diseases / Inflammasomes / Inflammation Limits: Animals / Humans Language: English Journal: Int J Biochem Cell Biol Journal subject: Biochemistry Year: 2020 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Viral Proteins / Virus Diseases / Inflammasomes / Inflammation Limits: Animals / Humans Language: English Journal: Int J Biochem Cell Biol Journal subject: Biochemistry Year: 2020 Document Type: Article