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The interaction of genetic and environmental contributions to immunological traits and their association with atopic disease remain unclear. Flow cytometry and in vitro cytokine responses were used to characterize immune profiles from 93 school-aged twin pairs. Using an established twin pair analytical strategy, the genetic and environmental influences on immunological traits were evaluated, along with their association with atopy. Our findings suggest strong genetic influence on several traits, particularly B cell abundance. In contrast, cytokine responses from in vitro stimulations appeared mainly shaped by environmental exposures.

Beneficial health effects of ultraviolet radiation: expert review and conference report

Carcinogenic effects of ultraviolet radiation (UVR) with reference to skin cancer are the basis of widely implemented recommendations to avoid sun exposure. Whether the benefits of "restrictive sun policies" outweigh their potential harms due to diminished beneficial effects of sunlight exposure remain a matter of controversy.

Plasma testosterone concentration is correlated with circulating immune cell abundance in transgender young people on gender-affirming hormone treatment

Sex hormones, such as oestrogen and testosterone, display significant immune modulatory properties. This is highly relevant for transgender (trans) people who undergo gender-affirming hormone (GAH) treatment. However, only a limited number of studies have evaluated the immunological impact of GAH treatments, and almost none have assessed the impact in trans young people.

Reduced Type-I Interferon by Plasmacytoid Dendritic Cells and Asthma in School-Aged Children

Allergic sensitization and reduced ability to respond to viral infections may contribute to virus-induced wheeze and asthma development in young children. Plasmacytoid dendritic cells (pDC) are rare immune cells that produce type I interferons (IFN-I) and play a key role in orchestrating immune responses against viruses.

Proteomics confirms immune stabilizing effects of narrowband UVB treatment in patients with clinically isolated syndrome and multiple sclerosis

Multiple sclerosis (MS) demonstrates a latitude gradient in prevalence and severity, implicating ultraviolet B (UVB) exposure and photoimmune mechanisms in disease risk and progression. While narrowband (NB)-UVB phototherapy has long stabilized inflammation in dermatology, its systemic immunomodulatory effects in MS remain incompletely defined.

Nasal Delivery of Haemophilus haemolyticus Is Safe, Reduces Influenza Severity, and Prevents Development of Otitis Media in Mice

Despite vaccination, influenza and otitis media (OM) remain leading causes of illness. We previously found that the human respiratory commensal Haemophilus haemolyticus prevents bacterial infection in vitro and that the related murine commensal Muribacter muris delays OM development in mice. The observation that M muris pretreatment reduced lung influenza titer and inflammation suggests that these bacteria could be exploited for protection against influenza/OM.

Deborah Strickland

Head, Pregnancy and Early Life Immunology

Restricted aeroallergen access to airway mucosal dendritic cells in vivo limits allergen-specific

Chronic innocuous aeroallergen exposure attenuates CD4+ T cell-mediated airways hyperresponsiveness in mice; however, the mechanism(s) remain unclear

Epithelial-dendritic cell interactions in allergic disorders

Airway epithelial cells act through multiple mechanisms to function as an important component of the pulmonary defence strategy that is crucial...

Interactions between innate and adaptive immunity in asthma pathogenesis: new perspectives from studies on acute exacerbations

Atopic asthma, which is at its highest prevalence during childhood/young adulthood, represents the main focus of this review.