vitamin D
vitamin D
Overview
Vitamin D is a fat-soluble secosteroid with central roles in calcium and phosphate homeostasis, skeletal development, and broader endocrine, immune, and neuromuscular regulation. In biomedical research, the term often refers to circulating vitamin D status, commonly assessed as 25-OH vitamin D, as well as the biologically active form 1α,25-(OH)2 vitamin D. Its actions are mediated primarily through the vitamin D receptor, which influences gene transcription and can affect inflammatory signaling, oxidative stress, cell differentiation, and tissue remodeling.
As a therapeutic and preventive target, vitamin D is studied across a wide range of conditions, including obesity-related metabolic dysfunction, osteoporosis, headache, fatty liver disease, vaccine responsiveness, chemotherapy-associated neurotoxicity, and developmental or toxicant-related tissue injury. Recent work also examines how vitamin D status interacts with genetic variation, environmental exposures, and co-interventions such as calcium supplementation.
Focus of Latest Publications
Recent publications on vitamin D as a therapeutic target span preventive, adjunctive, and mechanistic studies across pregnancy, oncology, neurology, metabolic disease, and developmental biology. In pregnancy, a double-blind randomized controlled trial protocol is evaluating whether vitamin D3 supplementation at 2000 IU/day, compared with standard care at 500 IU/day, can reduce preterm birth and premature rupture of membranes in a setting with a high prevalence of vitamin D deficiency. In breast cancer, a prospective cohort study found that pre-treatment vitamin D insufficiency was independently associated with a markedly higher risk of severe paclitaxel-induced sensory neuropathy, supporting vitamin D status as a potential modifiable factor during chemotherapy. Another cohort study examined baseline active vitamin D levels before COVID-19 mRNA vaccination, reflecting growing interest in whether vitamin D status influences vaccine-induced immunity.
Several studies explored vitamin D in combination with other interventions or compounds. In a rat model of type 2 diabetic nephropathy, vitamin D supplementation combined with resistance training improved glucose metabolism, insulin sensitivity, renal function, fibrosis, and inflammation, with moderate-intensity resistance training producing the strongest effects; this was linked to increased renal vitamin D receptor expression and inhibition of p38 MAPK and ERK1/2 signaling. In contrast, a dental enamel formation study found that calcium and vitamin D supplementation did not significantly reverse fluoride- and amoxicillin-associated enamel disruption or normalize matrix protein alterations under the tested conditions. A melanoma cell study investigated combined liposomal and free formulations of caffeic acid phenethyl ester and vitamin D, focusing on cytotoxicity against melanoma cell lines and effects on normal dermal fibroblasts, consistent with interest in vitamin D-containing anti-tumor combinations.
Other recent work suggests broader biologic and predictive roles for vitamin D. In offspring of mice exposed to maternal propofol, vitamin D was studied for its potential to alleviate neurotoxicity, based on its reported effects on neurotrophin and neuromediator synthesis and on neuroinflammation and neuroapoptosis. In children and adolescents, population-based data showed an inverse association between vitamin D levels and headache risk, with body mass index partially mediating the relationship. Finally, a multiscale drug-discovery analysis for glioma identified vitamin D among candidate therapies and highlighted the vitamin D3 receptor among top interacting targets, reinforcing interest in vitamin D-related pathways in brain tumor biology.