Vitamin D improves immune function in immunosuppressant mice induced by glucocorticoid

Wang,Zongye; Wang,Ying; Xu,Bingxin; Liu,Junli; Ren,Ye; Dai,Zhuojie; Cui,Di; Su,Xiaoming; Si,Shaoyan; Song,Shu  Jun

doi:10.3892/br.2016.817

Vitamin D improves immune function in immunosuppressant mice induced by glucocorticoid

Authors:
- Zongye Wang
- Ying Wang
- Bingxin Xu
- Junli Liu
- Ye Ren
- Zhuojie Dai
- Di Cui
- Xiaoming Su
- Shaoyan Si
- Shu Jun Song
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Affiliations: Department of Therapeutic Radiology and Oncology, The 306th Hospital of PLA, ChaoYang, Beijing 100101, P.R. China, Center for Special Medicine and Experimental Research, The 306th Hospital of PLA, ChaoYang, Beijing 100101, P.R. China
Published online on: November 24, 2016 https://doi.org/10.3892/br.2016.817
Pages: 120-124

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Abstract

Vitamin D is an essential fat-soluble vitamin with multiple functions. Vitamin D receptor has been shown to be expressed in several types of immune cells suggesting vitamin D may have immune regulatory roles. Vitamin D insufficiency has been suggested to increase the risk of autoimmune diseases. However, little is known regarding its immunomodulatory effects in the condition of immune suppression. The aim of the present study was to investigate the regulatory effects of vitamin D on immune function in immunosuppressant mice. An immunosuppressant mouse model was induced by intraperitoneal injection with glucocorticiod for 3 days. Immunosuppressant mice were intragastrically administered with 1,25-dihydroxy-vitamin D3 [1,25(OH)2D3; 0,4, 6 or 10 IU/g body weight] for 7 days. On day 8, the mice were decapitated. The body weight and the weights of thymus and spleen were measured. Thymus and spleen indexes were calculated. The ratio of CD4+/CD8+ T lymphocytes in the peripheral blood, proliferation and interleukin‑2 (IL‑2) production of spleen T lymphocytes was detected. Compared with the mice in the control group, the body weight, thymus and spleen indexes, the ratios of CD4+/CD8+ in peripheral blood and IL‑2 production and proliferation of spleen T lymphocytes were decreased in immunosuppressant mice induced by glucocorticiod. However, in vitamin D‑treated mice, the thymus indexes, the ratios of CD4+/CD8+, secretion of IL‑2 and the proliferation index of spleen T lymphocytes were significantly increased (P<0.05). Among the three doses of 1,25(OH)2D3, 6 IU/g was most effective in improving the immune function. These results indicate that vitamin D supplementation can improve immune recovery in immunosuppressant mice by stimulating T-cell proliferation and elevating IL-2 production.

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