Calcitriol decreases HIV-1 transfer in vitro from monocyte-derived dendritic cells to CD4 + T cells, and downregulates the expression of DC-SIGN and SIGLEC-1

Dendritic cells (DCs) promote HIV-1 transmission by acting as Trojan horses, capturing viral particles, facilitating the infection of CD4+ T-cells. Vitamin D (VitD) has shown to decrease T cell activation, reducing susceptibility to HIV-1 infection of CD4+ T-cells in vitro; however, if VitD decrease...

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Published in:PloS one 2022-07, Vol.17 (7), p.e0269932-e0269932
Main Authors: Alvarez, Natalia, Gonzalez, Sandra M, Hernandez, Juan C, Rugeles, Maria T, Aguilar-Jimenez, Wbeimar
Format: Article
Language:English
Subjects:
25-Hydroxyvitamin D
Antibiotics
Biology and Life Sciences
Calcitriol
CD4 antigen
Cell activation
Cell culture
DC-SIGN protein
Dendritic cells
Disease transmission
Flow cytometry
Gene expression
Health aspects
Health care
HIV
HIV (Viruses)
Human immunodeficiency virus
Infections
Lymphocytes
Lymphocytes T
Malware
Medicine and Health Sciences
Monocytes
Prevention
Research and Analysis Methods
Vitamin D
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Summary:Dendritic cells (DCs) promote HIV-1 transmission by acting as Trojan horses, capturing viral particles, facilitating the infection of CD4+ T-cells. Vitamin D (VitD) has shown to decrease T cell activation, reducing susceptibility to HIV-1 infection of CD4+ T-cells in vitro; however, if VitD decreases viral transfer from DCs to CD4+ T-cells is unknown. In this study, we co-cultured HIV-1-pulsed immature and LPS mature monocytes-derived DCs (iDCs and LmDCs, respectively), differentiated in presence or absence of calcitriol (VitD active form), with PHA-activated autologous CD4+ T-cells from 16 healthy donors. In co-cultures of iDCs and LmDCs treated with calcitriol, there was a significant decrease in frequency of infected CD4+ T-cells, evaluated by flow cytometry. However, p24 levels evaluated by ELISA were not significantly reduced in culture supernatants. Moreover, calcitriol-treated iDCs exhibited decreased expression of genes involved in HIV-1 transfer compared to the control. Both, calcitriol-treated iDCs and LmDCs exhibit a similar gene expression profile, probably related to a transcriptional balance achieved after long treatment with calcitriol. Since calcitriol-differentiated DCs express on their surface a lower amount of DC-SIGN and SIGLEC-1 molecules, widely associated with HIV-1 transfer, suggesting that this mechanism contributes to a lower transfer of viral particles by the DCs.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0269932