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Predictive value of myositis antibodies: role of semiquantitative classification and positivity for more than one autoantibody.
RMD Open
January 2025
TYKS laboratories, Clinical Microbiology, Turku University Hospital, Turku, Finland.
Objectives: We assessed the positive predictive value (PPV) of 17 myositis antibodies for having a diagnosis of myositis and other myositis-spectrum conditions (interstitial lung disease (ILD), connective tissue diseases (CTD), malignancy) and evaluated the impact of semiquantitative classification and antibody overlap on the PPVs.
Materials And Methods: We retrospectively identified 1068 individuals ≥18 years who tested positive for ≥1 antibody in the EUROLINE myositis line blot assay or positive for anti-3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) in an ELISA-based test between 2015 and 2020 in 15 out of the 20 hospital districts in Finland. We extracted clinical diagnoses from the Care Register for Health Care between January 2013 and June 2022.
Therapeutic plasmapheresis as an effective treatment for refractory anti-3-hydroxy-3-methylglutaryl coenzyme A reductase-positive immune-mediated necrotising myopathy.
BMJ Case Rep
January 2025
Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia.
Immune-mediated necrotising myopathy (IMNM) can be associated with autoantibodies to 3-hydroxy-3-methylglutaryl coenzyme A reductase (anti-HMGCR). We present a case of a man in his 60s with a 13-year history of relapsing anti-HMGCR-positive IMNM, intermittently partially responsive to various treatments including corticosteroids, methotrexate, mycophenolate, intravenous immunoglobulin, abatacept and rituximab. After a repeat presentation with severe weakness, plasmapheresis was commenced, resulting in rapid and significant improvement in muscle strength and biochemical markers, which was sustained for several months.
View Article and Find Full Text PDFPotential antihyperlipidemic effects of myrcenol and curzerene in high-fat fed rats.
BMC Pharmacol Toxicol
January 2025
Evangelical College, N'Djamena, BP 1200, Chad.
The study evaluated the anti-hyperlipidemic effects of myrcenol and curzerene on a high fat diet induced hyperlipidemia rat model. Thirty male albino rats were fed on a high-fat diet for four months. The HFD-induced hyperperlipidemia rats were treated with rosuvastatin (10 mg/kg), curzerene (130 mg/kg) and myrcenol (100 mg/kg) for four weeks.
View Article and Find Full Text PDFIncreased SOAT2 expression in aged regulatory T cells is associated with altered cholesterol metabolism and reduced anti-tumor immunity.
Nat Commun
January 2025
Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Immune functions decline with aging, leading to increased susceptibility to various diseases including tumors. Exploring aging-related molecular targets in elderly patients with cancer is thus highly sought after. Here we find that an ER transmembrane enzyme, sterol O-acyltransferase 2 (SOAT2), is overexpressed in regulatory T (Treg) cells from elderly patients with lung squamous cell carcinoma (LSCC), while radiomics analysis of LSCC patients associates increased SOAT2 expression with reduced immune infiltration and poor prognosis.
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