Throughout their training and practice, physicians become adept at pattern recognition as a means to efficiently connect and synthesize seemingly disparate laboratory, physical exam, and radiologic and historical findings into a coherent theory for what likely ails the patient sitting in front of them. This inductive method of reasoning is necessary because, based on these…
Antisynthetase syndrome (AS) is strongly associated with the presence of antibodies to aminoacyl-transfer RNA (tRNA) synthetases (ARSs) that are implicated in the pathogenesis of myositis and interstitial lung disease (ILD). Antibodies against eight antisynthetases have been identified and are detected in 16–26% of patients with idiopathic inflammatory myopathies (IIM).1 Serum assays for five of these…
NEW YORK (Reuters Health)—Fluctuations in the gut microbiome over time could underlie inflammatory bowel disease (IBD), including Crohn’s and ulcerative colitis, researchers suggest. “Both the state and the dynamics of the human gut microbiome in healthy individuals are highly personalized. Although cross-sectional studies have revealed dysbiosis of the gut microbiome in IBD, little is known…
Erdheim-Chester disease (ECD) is a rare, non-Langerhan’s cell histiocytosis characterized by tissue infiltration of CD68-positive and CD1a-negative foamy histiocytes.1 ECD was discovered as a lipid granulomatosis in 1930 by Jakob Erdheim and his pupil, William Chester, and approximately 500 cases have been described to date.1 ECD has a heterogeneous course and prognosis ranging from an…
Corticosteroids still represent the mainstay of treatment of patients with active disease. They have been used for more than 60 years, and although prolonged use is associated with organ damage, they have been shown to be lifesaving in various phases of the history of the disease. History of Use First introduced in the late 1960s…
Two previously unidentified cellular players in the pathogenesis of primary Sjogren’s syndrome (pSS) have been discovered: a regulatory T cell (Prdm1+eTreg) and a helper T cell (Il21+Th1). In the study, researchers also identified the transcriptional signatures of these cells and their differential dependency on the lymphotoxin/LIGHT signaling axis, which may guide future therapeutic interventions…
By examining the phenotypic plasticity of cartilage and tendon cells, researchers found that oxidative stress and P13K signaling pathways are key modulators of the phenotype of musculoskeletal cells. Using monolayer and three-dimensional cultures, the experiments confirmed that dedifferentiation occurs via reductions in expression of genes for cartilage (Col2a1, Agcn) and tendon (Tnmd, Serpinf1)…
A recent study found that the varicella zoster virus downregulates expression of programmed death ligand 1 and major histocompatibility complex 1 in brain fibroblasts, perineurial cells and lung fibroblasts. These effects may lead to persistent inflammation in the vessels and lungs, as well as promote subsequent infection of T cells and the spread of the virus…
In May, the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) published its recommendations for the treatment of psoriatic arthritis (PsA).1 The updated recommendations represent advances in drug development and availability since previous recommendations published in 2009, as well changes in treatment paradigms and the importance of associated aspects of the disease.2…
Depending on stage, severity and rate of progression of disease, systemic corticosteroids are commonly used to treat pulmonary sarcoidosis. However, a review of the literature suggests they have limited usefulness in advanced stage IV pulmonary sarcoidosis. Once sarcoidosis has advanced to this degree, steroid use may unnecessarily expose a patient to life-threatening complications, as demonstrated…