Email updates

Keep up to date with the latest news and content from Retrovirology and BioMed Central.

This article is part of the supplement: Abstracts from the 17th International Symposium on HIV and Emerging Infectious Diseases (ISHEID)

Open Access Poster presentation

The relation between hemispheric lateralisation and measures of immune competence and adherence in Human Immunodeficiency Virus Type 1 (HIV-1)

Rachel C Sumner*, Alexander V Nowicky, Andrew Parton, Carolien Wylock, Renata Cserjesi, Patrick Lacor and Yori Gidron

Author Affiliations

Brunel University, Manchester, UK

For all author emails, please log on.

Retrovirology 2012, 9(Suppl 1):P79  doi:10.1186/1742-4690-9-S1-P79

The electronic version of this article is the complete one and can be found online at: http://www.retrovirology.com/content/9/S1/P79


Published:25 May 2012

© 2012 Sumner et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Introduction

Communication from the brain to the immune system is influenced by hemispheric lateralisation (HL). Left-HL is immunopotentiating, right-HL is immunosuppressive. Only one study has examined the effects of HL on the progression of HIV (Gruzelier et al., 1996). That study included a small sample with very little control over third variables. The present study tested whether left HL predicted higher CD4 and CD8 levels, statistically controlling for confounders.

Methods

Employing two neuropsychological assessments of HL (line bisection task and Zenhausern’s Hemispheric Preference Test), 69 HIV-1+ patients were followed prospectively. Numerous exclusion criteria and confounder assessments were employed (e.g., age, sex, mode of contraction, medication adherence) to provide a more rigourous and controlled analysis.

Results

The present work corroborated the theory of asymmetrical influence on HIV immunity by HL via a moderator: ethnicity. The main analysis of the research findings did not attain statistical significance in the whole group of patients. However, among African patients, left-HL predicted better immunity, while no such relationship was seen in European patients, independent of confounders. Further observations were made between HL and HIV-relevant behaviours. Left HL was related to higher number of sexual partners in Europeans. A near-significant relationship was observed between left HL and longer periods between HIV clinic attendances in Africans.

Conclusions

The present study adds new information concerning a moderating factor of the HL-immunity relationship in HIV. As expected, left-HL predicted higher CD4 and CD8 counts, but only in African patients. Further, the added methodological and statistical control employed, extend the validity of the HL-immunity relationship. Moreover, the present study has uncovered behavioural implications of HL in HIV disease. Potential explanations for neurobiological pathways in the relationship between HL and immunity are discussed.