Elevated non-specific immunity and normal Listeria clearance in young and old vitamin D receptor knockout mice

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Elevated non-specific immunity and normal Listeria clearance in young and old vitamin D receptor knockout mice.

1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)] and the vitamin D receptor (VDR) are important regulators of autoimmunity. The effect of the VDR on the ability of mice to fight a primary or secondary infection has not been determined. Young and old VDR knockout (KO) mice were able to clear both primary and secondary infections with Listeria monocytogenes. However, the kinetics of clearance was som...

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Normal myelopoiesis but abnormal T lymphocyte responses in vitamin D receptor knockout mice.

The vitamin D receptor (VDR) is a transcription factor that mediates the actions of its ligand, 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)], which can promote monocyte/macrophage differentiation and inhibit proliferation and cytokine production by activated T lymphocytes. In this study, VDR knockout (KO) mice were used to investigate the possible role of VDR in hematopoiesis. The relative numb...

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Effects of Vitamin D in Neonates and Young Infants

Vitamin D is important for the development, growth, and mineralization of the skeletal in neonates and children. Vitamin D is essential for intestinal absorption of calcium. Vitamin D is metabolized to 25-hydroxyvitamin D and then to 1,25-dihydroxyvitamin D. Pregnant women in developed countries often have insufficient serum concentrations of 25-hydroxyvitamin D and a supplementation of vitamin...

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Duodenal calcium absorption in vitamin D receptor-knockout mice: functional and molecular aspects.

Rickets and hyperparathyroidism caused by a defective vitamin D receptor (VDR) can be prevented in humans and animals by high calcium intake, suggesting that intestinal calcium absorption is critical for 1,25(OH)(2) vitamin D [1,25(OH)(2)D(3)] action on calcium homeostasis. We assessed the rate of serum (45)Ca accumulation within 10 min of oral gavage in two strains of VDR-knockout (KO) mice (L...

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Vitamin D and immunity

Vitamin D deficiency has been linked to an increased risk of a wide range of adverse health outcomes. The active form of vitamin D has an important role in calcium metabolism and in bone mineralisation, but the evidence for other health outcomes is mixed, with the strongest effects seen in the weakest epidemiological study designs. There are plausible pathways whereby vitamin D deficiency can i...

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ژورنال

عنوان ژورنال: International Immunology

سال: 2008

ISSN: 1460-2377,0953-8178

DOI: 10.1093/intimm/dxn129