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Yuta Kochi and colleagues perform expression quantitative trait loci (eQTL) analysis on five subsets of immune cells individually sorted from blood from 105 individuals. They develop an integrated analysis pipeline of expression and epigenomic data along with gene association to identify cell-specific candidate causal genes and apply this to rheumatoid arthritis.
Skeletal muscle atrophy can occur in response to stimuli such as inactivity, fasting, and ageing. Here the authors show that expression of microRNA-29b promotes muscle atrophy by targeting IGF-1 and PI3K, and that its inhibition attenuates atrophy induced by denervation and immobilization in mice.
A growing body of evidence supports a shift away from bed rest and inactivity to prescribing physical activity for children and adolescents with rheumatic diseases. Increasing physical activity levels, as well as reducing hypoactivity, can improve symptoms and outcomes in this paediatric population.
When considering the role of imaging in the management of symptomatic, peripheral joint osteoarthritis (OA) in clinical practice, clinicians should be aware that radiography has its drawbacks, and also consider that the use of advanced imaging techniques such as MRI should not be discouraged.
Mechanistic studies have implicated the alternative complement pathway, specifically C5a receptor activation, in the pathogenesis of anti-neutrophil cytoplasmic antibody-associated vasculitis. Results from a phase 2 trial suggest that C5a receptor blockade could enable the reduced use or complete withdrawal of steroids from induction protocols.