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Published on: May 30, 2020

Genetic predisposition to diffuse panbronchiolitis

Naoto Keicho1, Minako Hijikata

  • 1Department of Respiratory Diseases, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan. nkeicho-tky@umin.ac.jp

Respirology (Carlton, Vic.)
|February 10, 2011
PubMed

Insights

Diffuse panbronchiolitis involves airway inflammation and infection, historically with poor prognosis. Genetic studies in East Asians suggest susceptibility genes near HLA-A and HLA-B loci, prompting research into novel mucin-like genes.

Area of Science:

  • Immunogenetics
  • Pulmonology
  • Molecular Biology

Background:

  • Diffuse panbronchiolitis is a chronic inflammatory airway disease often linked to sinobronchial infections.
  • Pathophysiology includes immune cell accumulation, mucus hypersecretion, and neutrophilic infiltration in airways.
  • Historically, prognosis was poor before the advent of long-term macrolide therapy.

Purpose of the Study:

  • To investigate the genetic underpinnings of diffuse panbronchiolitis, particularly in East Asian populations.
  • To identify potential susceptibility genes located in the human leukocyte antigen (HLA) region.
  • To explore the role of novel mucin-like genes in the disease's pathogenesis.

Main Methods:

  • Analysis of immunogenetic associations, including human leukocyte antigen (HLA) typing.
  • Case study reviews focusing on East Asian populations (Japanese, Koreans, Chinese).
  • Cloning and characterization of novel mucin-like genes within a candidate chromosomal region.

Main Results:

  • Strong association found between HLA-B54 and diffuse panbronchiolitis in Japanese individuals.
  • Association reported between HLA-A11 and the disease in Korean populations.
  • Novel mucin-like genes were successfully cloned from the HLA-A to HLA-B locus region.

Conclusions:

  • Genetic predisposition, potentially linked to specific HLA alleles, plays a role in diffuse panbronchiolitis susceptibility in Asians.
  • The identified candidate region on chromosome 6 is crucial for further investigation.
  • Newly identified mucin-like genes warrant further study for their contribution to diffuse panbronchiolitis pathogenesis.

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