Human airway epithelial cells direct significant rhinovirus replication in monocytic cells by enhancing ICAM1 expression

Xu Zhou, Lingxiang Zhu, Rosa Lizarraga, Yin Chen

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Human rhinovirus (RV) is the major cause of common cold, and it also plays a significant role in asthma and asthma exacerbation. The airway epithelium is the primary site of RV infection and production. In contrast, monocytic cells (e.g., monocytes and macrophages) are believed to be nonpermissive for RV replication. Instead, RV has been shown to modulate inflammatory gene expressions in these cells via a replication-independent mechanism. In the study presented here, replication of RV16 (a major-group RV) was found to be significantly enhanced in monocytes when it was cocultivated with airway epithelial cells. This effect appeared to bemediated by secretory components from epithelial cells,which stimulated RV16 replication and significantly elevated the expression of a number of proinflammatory cytokines. The lack of such an effect on RV1A, a minor-group RV that enters the cell by a different receptor, suggests that intercellular adhesion molecule 1 (ICAM1), the receptor for major-group RVs, may be involved. Indeed, conditioned media from epithelial cells significantly increased ICAM1 expression in monocytes. Consistently, ICAM1 overexpression and ICAM1 knockdown enhanced and blocked RVproduction, respectively, confirming the role of ICAM1 in this process. Thus, this is the first report demonstrating that airway epithelial cells direct significant RV16 replication in monocytic cells via an ICAM1-dependentmechanism. This finding will open a new avenue for the study of RV infection in airway disease and its exacerbation.

Original languageEnglish (US)
Pages (from-to)216-225
Number of pages10
JournalAmerican journal of respiratory cell and molecular biology
Volume57
Issue number2
DOIs
StatePublished - Aug 2017

Keywords

  • Airway
  • Epithelium
  • ICAM1
  • Rhinovirus

ASJC Scopus subject areas

  • Molecular Biology
  • Pulmonary and Respiratory Medicine
  • Clinical Biochemistry
  • Cell Biology

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