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Objectives: The study aimed to explore the association of sarcopenia and vitamin D deficiency with glucocorticoid-induced osteoporosis (GIOP) in Chinese patients with rheumatoid arthritis (RA).
Method: Skeletal muscle mass, serum 25(OH)D levels, and bone mineral density (BMD) were assessed.
Results: The prevalence of OP, sarcopenia, and vitamin D deficiency in RA patients was significantly higher than in controls (all P < 0.001). The percentage of GC use was 56.9%, and the prevalence of GIOP was 38.1% in 480 RA patients. The prevalence of OP in RA patients without sarcopenia was lower than that in RA patients with sarcopenia (P < 0.05). In RA patients with and without GC, the prevalence of OP in patients without sarcopenia was significantly lower than that in patients with sarcopenia (P < 0.001 and P < 0.05). Female sex (OR = 54.737; 95% CI: 7.103-421.809; P < 0.0001), age (OR = 1.078; 95% CI: 1.048-1.110; P < 0.0001), sarcopenia, and vitamin D deficiency (OR = 2.250; 95% CI: 1.246-64.065; P = 0.007) were risk factors for GIOP in RA patients.
Conclusions: GIOP is associated with sarcopenia and vitamin D deficiency and is widespread among Chinese patients with RA. Key points ·Percentage of using GC and the prevalence of OP were all high in Chinese patients with RA. ·GIOP was widely existed in Chinese RA patients, which was associated with sarcoprnia and vitamin D deficiency.
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http://dx.doi.org/10.1007/s10067-023-06784-5 | DOI Listing |
Clin Exp Immunol
September 2025
Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka 589-8511, Japan.
Introduction: Conventional dendritic cells (cDCs) in the gut express the vitamin A (VA)-converting enzyme retinal dehydrogenase 2 (RALDH2) and produce significant amounts of retinoic acid (RA). RA derived from gut cDCs contributes to the generation of tolerogenic responses by promoting Treg differentiation while inhibiting Th1 and Th17 cell differentiation. In this study, we investigated whether similar RA-mediated immunoregulatory mechanisms operate in the pancreas using an experimental autoimmune pancreatitis (AIP) model.
View Article and Find Full Text PDFFungal Biol
October 2025
Marmara Forestry Research Institute Directorate, Fatih Forest Campus, Maslak-Sarıyer, Istanbul, Türkiye.
Vitamin D is critically important for sustainable human health, and the rising prevalence of deficiency-related diseases has increased interest in natural sources. This study explores the potential of epiphytic lichen-forming fungi, known for their unique metabolites, as a novel biosource of vitamin D for pharmaceutical and nutraceutical applications. Fourteen epiphytic lichen species were collected using a stratified sampling method from four mountainous forests in the Marmara Region of Türkiye.
View Article and Find Full Text PDFInt J Biol Macromol
September 2025
Plant Biotechnology Research Center, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Minhang, Shanghai, 200240, China. Electronic address:
Vitamin A deficiency is one of the most severe micronutrient-related health issues worldwide. Tomatoes, a widely cultivated crop for their adaptability, nutritional value, and lycopene content (a beta-carotene precursor), are ideal candidates for biofortification. In this study, CRISPR-mediated knockout mutants (cr-SlLCYe and cr-SlBCH) were generated to enhance the precursor supply to the β-carotene biosynthetic pathway and reduce its degradation.
View Article and Find Full Text PDFEur J Nutr
September 2025
Nutritional Biomarker Laboratory, MRC Epidemiology Unit, University of Cambridge, Cambridge, UK.
Background: The UK has a high and increasing prevalence of folate deficiency. The decision to start mandatory folic acid fortification has not yet been implemented. Concern has been raised about the effect of high folate on vitamin B12 status.
View Article and Find Full Text PDFArch Gynecol Obstet
September 2025
Department of Midwifery, School of Nursing and Midwifery, Guilan University of Medical Sciences, Rasht, Iran.
Background: Polycystic ovary syndrome (PCOS) is characterized by reproductive and endocrine abnormalities.
Objective: The present study aimed to assess the effect of oral contraceptive pills (OCPs) and vitamin D3 on sexual dysfunction in women with PCOS and vitamin D3 deficiency.
Materials And Methods: This randomized double-blind placebo-controlled clinical trial was conducted in Iran between January and April 2019.