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Research

Defective cell migration as a mechanism of dysregulated asthmatic airway repair

The findings from this study show that in children with asthma this protective barrier is different from children without asthma.

Research

The airway epithelium is a direct source of matrix degrading enzymes in bronchiolitis obliterans syndrome

Long-term survival after lung transplantation is hindered by the development of bronchiolitis obliterans syndrome (BOS).

Research

Ancestral SARS-CoV-2, but not Omicron, replicates less efficiently in primary pediatric nasal epithelial cells

Children typically experience more mild symptoms of Coronavirus Disease 2019 (COVID-19) when compared to adults. There is a strong body of evidence that children are also less susceptible to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection with the ancestral viral isolate.

Research

ACE2 expression is elevated in airway epithelial cells from older and male healthy individuals but reduced in asthma

COVID-19 is complicated by acute lung injury, and death in some individuals. It is caused by SARS-CoV-2 that requires the ACE2 receptor and serine proteases to enter AEC. We determined what factors are associated with ACE2 expression particularly in patients with asthma and COPD. We obtained lower AEC from 145 people from two independent cohorts, aged 2-89 years, Newcastle (n = 115) and Perth (n = 30), Australia. The Newcastle cohort was enriched with people with asthma (n = 37) and COPD (n = 38). Gene expression for ACE2 and other genes potentially associated with SARS-CoV-2 cell entry was assessed by qPCR, and protein expression was confirmed with immunohistochemistry on endobronchial biopsies and cultured AEC.

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Macrophage PD-1 associates with neutrophilia and reduced bacterial killing in early cystic fibrosis airway disease

Macrophages are the major resident immune cells in human airways coordinating responses to infection and injury. In cystic fibrosis, neutrophils are recruited to the airways shortly after birth, and actively exocytose damaging enzymes prior to chronic infection, suggesting a potential defect in macrophage immunomodulatory function.

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Productive infection of human embryonic stem cell-derived nkx2.1+ respiratory progenitors with human rhinovirus.

Our experiments provide proof of principle for the use of PSC-derived respiratory epithelial cells in the study of cell-virus interactions.

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Transcription factor p63 regulates key genes and wound repair in human airway epithelial Basal cells

The airway epithelium in asthma displays altered repair and incomplete barrier formation.

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Persistent induction of goblet cell differentiation in the airways: Therapeutic approaches

Here we review the current knowledge of key molecular pathways that are dysregulated during persistent goblet cell differentiation

Research

Vitamin D supplementation of initially vitamin D-deficient mice diminishes lung inflammation with limited effects on pulmonary epithelial integrity

In disease settings, vitamin D may be important for maintaining optimal lung epithelial integrity and suppressing inflammation, but less is known of its effects prior to disease onset.

Research

Accumulation mode particles and LPS exposure induce TLR-4 dependent and independent inflammatory responses in the lung

We aimed to delineate the effects of LPS and AMP on airway inflammation, and potential contribution to airway disease by measuring airway inflammatory responses