Roider, J;
Maehara, T;
Ngoepe, A;
Ramsuran, D;
Muenchhoff, M;
Adland, E;
Aicher, T;
... Leslie, A; + view all
(2018)
High-frequency, functional HIV-specific T-follicular helper and regulatory cells are present within germinal centers in children but not adults.
Frontiers in Immunology
, 9
, Article 1975. 10.3389/fimmu.2018.01975.
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Abstract
Broadly neutralizing antibodies (bnAbs) against HIV-1 are an effective means of preventing transmission. To better understand the mechanisms by which HIV-specific bnAbs naturally develop, we investigated blood and lymphoid tissue in pediatric infection, since potent bnAbs develop with greater frequency in children than adults. As in adults, the frequency of circulating effector T-follicular helper cells (TFH) in HIV infected, treatment naïve children correlates with neutralization breadth. However, major differences between children and adults were also observed both in circulation, and in a small number of tonsil samples. In children, TFH cells are significantly more abundant, both in blood and in lymphoid tissue germinal centers, than in adults. Second, HIV-specific TFH cells are more frequent in pediatric than in adult lymphoid tissue and secrete the signature cytokine IL-21, which HIV-infected adults do not. Third, the enrichment of IL-21-secreting HIV-specific TFH in pediatric lymphoid tissue is accompanied by increased TFH regulation via more abundant regulatory follicular T-cells and HIV-specific CXCR5+ CD8 T-cells compared to adults. The relationship between regulation and neutralization breadth is also observed in the pediatric PBMC samples and correlates with neutralization breadth. Matching neutralization data from lymphoid tissue samples is not available. However, the distinction between infected children and adults in the magnitude, quality and regulation of HIV-specific TFH responses is consistent with the superior ability of children to develop high-frequency, potent bnAbs. These findings suggest the possibility that the optimal timing for next generation vaccine strategies designed to induce high-frequency, potent bnAbs to prevent HIV infection in adults would be in childhood.
| Type: | Article |
|---|---|
| Title: | High-frequency, functional HIV-specific T-follicular helper and regulatory cells are present within germinal centers in children but not adults |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3389/fimmu.2018.01975 |
| Publisher version: | https://doi.org/10.3389/fimmu.2018.01975 |
| Language: | English |
| Additional information: | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | pediatric HIV infection, broadly neutralizing antibodies (bnAb), T-follicular helper cells (Tfh), T-follicular regulatory helper cells (Tfreg), follicular CD8 T-cells, germinal center, vaccination |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Infection and Immunity |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10064173 |
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