Related Experiment Video
Updated: Jun 25, 2025

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
Vitamin D and immune system
Geoffrey Brown1, Aleksandra Marchwicka2, Ewa Marcinkowska2
1School of Biomedical Sciences, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom.
The active metabolite of vitamin D, 1,25(OH)2D, modulates the immune system. Low vitamin D levels are linked to autoimmune diseases and severe infections, suggesting its crucial role in immune health.
Area of Science:
- Immunology
- Endocrinology
- Nutritional Science
Background:
- The active metabolite of vitamin D, 1,25(OH)2D, is primarily known for calcium-phosphate homeostasis.
- Emerging evidence highlights the significant immunomodulatory functions of 1,25(OH)2D.
- Low serum vitamin D levels are frequently associated with autoimmune conditions and increased susceptibility to infections.
Purpose of the Study:
- To examine the role of 1,25(OH)2D in autoimmune diseases and acute infections.
- To elucidate the mechanisms by which 1,25(OH)2D influences immune cells.
Main Methods:
- Literature review and synthesis of existing research on vitamin D and the immune system.
- Analysis of studies correlating vitamin D levels with disease outcomes.
- Discussion of proposed molecular pathways of 1,25(OH)2D in immune cells.
Main Results:
- 1,25(OH)2D exhibits potent immunomodulatory effects.
- Deficiency in vitamin D is linked to increased risk and severity of autoimmune diseases.
- Vitamin D status appears to influence the course of acute infections.
Conclusions:
- 1,25(OH)2D plays a critical role in immune system regulation.
- Therapeutic strategies targeting vitamin D metabolism may offer benefits for autoimmune diseases and infections.
- Further research into the mechanisms of 1,25(OH)2D in immune cells is warranted.
Related Concept Videos
Role of Skin in Vitamin D Synthesis
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin...
Role of Vitamins in Maintaining Bone Health
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Connective Tissue Cell Types
Fat cells (adipocytes), smooth muscle cells (myoblasts), and bone cells (osteoblasts) are some connective tissue cell types. Some immune system cells...
Immunodeficiency Diseases
There are three main causes of immunodeficiency...
Functions of the Lymphatic and Immune System
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...

