Growth and Neurodevelopment of HIV-Exposed Uninfected Children: a Conceptual Framework

Catherine J Wedderburn, Ceri Evans, Shunmay Yeung, Diana M Gibb, Kirsten A Donald, Andrew J Prendergast, Catherine J Wedderburn, Ceri Evans, Shunmay Yeung, Diana M Gibb, Kirsten A Donald, Andrew J Prendergast

Abstract

Purpose of review: The population of HIV-exposed uninfected (HEU) children is expanding rapidly, and over one million HEU infants are born each year globally. Several recent studies have reported that HEU children, particularly in low- and middle-income countries, are at risk of poor outcomes, including impaired growth and neurodevelopment. However, the reasons for poor clinical outcomes amongst HEU children remain unclear.

Recent findings: We summarise the findings from recent large studies that have characterised growth and neurodevelopment in HEU children, identified risk factors and explored underlying mechanistic pathways. We propose a conceptual framework to explain how exposure to HIV and antiretroviral therapy (ART) may lead to adverse growth and neurodevelopment in uninfected children, and review the available evidence and research gaps. We propose that HEU children are affected both indirectly, through the augmentation of universal risk factors underlying poor growth and neurodevelopment, and directly through HIV/ART-specific pathways, which ultimately may converge through a series of common pathogenic mechanisms. In the era of universal ART, a better understanding of these pathways is crucial to inform future prevention and intervention strategies.

Keywords: Child; Early child development; Growth; HIV-exposed uninfected; Stunting.

Conflict of interest statement

Catherine J. Wedderburn, Ceri Evans, Shunmay Yeung, Diana M. Gibb, Kirsten A. Donald and Andrew J. Prendergast declare no conflicts of interest. Catherine J. Wedderburn, Ceri Evans and Andrew J. Prendergast are supported by the Wellcome Trust (203525/Z/16/Z; 203905/Z/16/Z; 108065/Z/15/Z).

Figures

Fig. 1
Fig. 1
The cycle of child growth and development
Fig. 2
Fig. 2
Conceptual framework of the hypothesised pathways through which HIV and ART exposure affect child growth and development. Red lines demarcate HIV-specific pathways; blue lines represent universal pathways. ART, antiretroviral therapy

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