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• W1550455296 abstract "Expression of mannose binding lectin in HIV-1-infected brain: implications for HIV-related neuronal damage and neuroAIDS Kumud K Singh1, Satyanarayana Nathamu1, Anthony Adame2, Tara U Alire1, Wilmar Dumaop2, Ben Gouaux3, David J Moore3, Eliezer Masliah2, and HIV Neurobehavioral Research Center Group1Department of Pediatrics, 2Department of Neurosciences, 3Department of Psychiatry, University of California San Diego, La Jolla, CA, USAAbstract: Mannose binding lectin (MBL) activates complement pathway that leads to pathogen opsonization and phagocytosis. MBL deficiency is linked to HIV transmission and disease progression. We sought to determine the role of MBL in HIV encephalitis (HIVE) by evaluating its presence and distribution in the HIV-1-infected brain and by assessing its association with monocyte chemoattractant protein-1 (MCP-1) expression. This retrospective study utilized archived post-mortem brain tissues obtained from 35 individuals enrolled in a longitudinal study as part of the California NeuroAIDS Tissue Network. MBL, MCP-1 and brain cell markers in post-mortem brain tissues with or without HIVE were evaluated using immunocytochemistry, immunofluorescence, confocal microscopy, and western blots. MBL was expressed in neurons, astrocytes, microglia, and oligodendrocytes of the frontal cortex of the HIV-1-infected brain. Overall, there were 30% to 40% more MBL-positive brain cells in HIVE vs non-HIVE cases (P = 0.01, paired t-test). Specifically, there was an increased MBL expression in the neuronal axons of HIVE cases. Also, western blots showed 3- to 4-fold higher levels of 78 kD MBL trimers in HIVE vs non-HIVE cases. This MBL-HIVE link was further confirmed by MBL associated higher MCP-1 expression in HIVE vs non-HIVE cases. HIV negative healthy individuals and normal or the gp120 transgenic mice did not show any differential MBL expression. Increased MBL expression in the major brain cell types, specifically in the neuronal axons of HIVE brain, and MBL associated higher MCP-1 expression in HIVE suggest that MBL could cause neuroinflammation and neuronal injury through MBL complement activation pathway.Keywords: mannose binding lectin, HIV encephalitis, complement activation, neuroinflammation, neuroAIDS, MCP-1" @default.
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• W1550455296 date "2011-05-01" @default.
• W1550455296 modified "2023-10-02" @default.
• W1550455296 title "Expression of mannose binding lectin in HIV-1-infected brain: implications for HIV-related neuronal damage and neuroAIDS" @default.
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• W1550455296 doi "https://doi.org/10.2147/nbhiv.s19969" @default.
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