Vitamin D Deficiency Contributes to the Reduction and Impaired Function of Naïve
Regulatory T Cell in Chronic Heart Failure
1,25(OH)2D ameliorates the impaired immunomodulation of CD4+CD45RA+T cell. (a) CD4+CD45RA+T cells were purified from HD and CHF, labeled with CFSE subsequently, and incubated with 1,25(OH)2D or DMSO for 5 days. Representative flow cytometric dot plots and histograms of CFSE and IL-17A double staining. (b) Suppression of responder T cell proliferation was preceded using transwells. 1,25(OH)2D induced CD4+CD45RA+T or CD4+CD45RA−T cells were placed into top chamber while CD4+CD25−T cells were added into bottom chamber. After 5 days, cells were stained for CD4 and proliferation of CFSE-labeled responder T cells was analyzed on a flow cytometer. (c) The level of IL-10 and IL-17 in culture supernatant on day 5 was detected by ELISA. Data are representative of five independent experiments. Results shown are the mean ± SEM; *.
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