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The spatial relationship between neurons and astrocytes in HIV-associated dementia

Research output: Contribution to journalArticle

Eleanor Roberts, Gursharan Chana, Timothy B. Nguyen, Perera Gayathi, Sabine Landau, Rabe-Hesketh Sophia, Glass Jonathan D., McArthur Justin, Everall Ian Paul

Original languageEnglish
Pages (from-to)123-130
Number of pages8
JournalJournal of NeuroVirology
Volume19
Issue number2
Early online date21 Feb 2013
DOIs
Publication statusPublished - Apr 2013

King's Authors

Abstract

Specific neuronal spatial distributional patterns have previously been correlated with increasing severity of HIV-associated dementia (HAD). As astrocytes are also a putative site of neurotoxicity, we investigated the spatial relationships of astrocytes with pyramidal and interneurons in the superior frontal gyrus from 29 patients who died from acquired immunodeficiency syndrome. Frontal cortical brain tissue was taken from diseased HIV patients who had been assessed for the presence and severity of HAD using the Memorial Sloan-Kettering Scale. No correlation was found between neuronal density and severity of dementia. However, the pattern of astrocytes became more clustered as dementia progressed. Bivariate spatial pattern analysis of neuronal populations with astrocytes revealed that, with increasing dementia severity, astrocytes and large pyramidal neurons increasingly “repelled” each other, while astrocytes and interneurons evidenced increasing “attraction.” This implies that astrocytes may be more likely to be situated in the vicinity of surviving interneurons but less likely to be situated near surviving large pyramidal neurons in the setting of progressing HAD.

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