Enteric Species F Human Adenoviruses use Laminin-Binding Integrins as Co-Receptors for Infection of Ht-29 Cells

Sci Rep. 2018 Jul 3;8(1):10019. doi: 10.1038/s41598-018-28255-7.

Abstract

The enteric species F human adenovirus types 40 and 41 (HAdV-40 and -41) are the third most common cause of infantile gastroenteritis in the world. Knowledge about HAdV-40 and -41 cellular infection is assumed to be fundamentally different from that of other HAdVs since HAdV-40 and -41 penton bases lack the αV-integrin-interacting RGD motif. This motif is used by other HAdVs mainly for internalization and endosomal escape. We hypothesised that the penton bases of HAdV-40 and -41 interact with integrins independently of the RGD motif. HAdV-41 transduction of a library of rodent cells expressing specific human integrin subunits pointed to the use of laminin-binding α2-, α3- and α6-containing integrins as well as other integrins as candidate co-receptors. Specific laminins prevented internalisation and infection, and recombinant, soluble HAdV-41 penton base proteins prevented infection of human intestinal HT-29 cells. Surface plasmon resonance analysis demonstrated that HAdV-40 and -41 penton base proteins bind to α6-containing integrins with an affinity similar to that of previously characterised penton base:integrin interactions. With these results, we propose that laminin-binding integrins are co-receptors for HAdV-40 and -41.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenoviruses, Human / metabolism*
  • Animals
  • CHO Cells
  • Cell Line
  • Cricetulus
  • HT29 Cells
  • Humans
  • Integrin alpha6 / metabolism*
  • Integrin alpha6beta4 / metabolism*
  • Laminin / metabolism*
  • Receptors, Virus / metabolism*
  • Surface Plasmon Resonance
  • Virus Attachment*

Substances

  • Integrin alpha6
  • Integrin alpha6beta4
  • Laminin
  • Receptors, Virus

Supplementary concepts

  • Human mastadenovirus F