Cited by 40HIV Research and TreatmentNeuroinflammation and Neurodegeneration MechanismsInfectious Diseases and Tuberculosis

Role of anti-inflammatory compounds in human immunodeficiency virus-1 glycoprotein120-mediated brain inflammation

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Ashraf, Tamima, Jiang, Wenlei, Hoque, Md Tozammel, Henderson, Jeffrey, Wu, Chiping, Bendayan, Reina·2014·Journal of Neuroinflammation

Abstract

BACKGROUND: Neuroinflammation is a common immune response associated with brain human immunodeficiency virus-1 (HIV-1) infection. Identifying therapeutic compounds that exhibit better brain permeability and can target signaling pathways involved in inflammation may benefit treatment of HIV-associated neurological complications. The objective of this study was to implement an in vivo model of brain inflammation by intracerebroventricular administration of the HIV-1 viral coat protein gp120 in rats and to examine anti-inflammatory properties of HIV adjuvant therapies such as minocycline, chloroquine and simvastatin. METHODS: Male Wistar rats were administered a single dose of gp120ADA (500 ng) daily for seven consecutive days, intracerebroventricularly, with or without prior intraperitoneal administration of minocycline, chloroquine or simvastatin. Maraviroc, a CCR5 antagonist, was administered intracerebroventricularly prior to gp120 administration for seven days as control. Real-time qPCR was used to assess gene expression of inflammatory markers in the frontal cortex, hippocampus and striatum. Interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) secretion in cerebrospinal fluid (CSF) was measured applying ELISA. Protein expression of mitogen-activated protein kinases (MAPKs) (extracellular signal-related kinase 1/2 (ERK1/2), c-Jun N-terminal kinases (JNKs) and P38 kinases (P38Ks)) was detected using immunoblot analysis. Student's t-test and ANOVA were applied to determine statistical significance. RESULTS: In gp120ADA-injected rats, mRNA transcripts of interleukin-1β (IL-1β) and inducible nitric oxide synthase (iNOS) were significantly elevated in the frontal cortex, striatum and hippocampus compared to saline or heat-inactivated gp120-injected controls. In CSF, a significant increase in TNF-α and IL-1β was detected. Maraviroc reduced upregulation of these markers suggesting that the interaction of R5-tropic gp120 to CCR5 chemokine receptor is critical for induction of an inflammatory response. Minocycline, chloroquine or simvastatin attenuated upregulation of IL-1β and iNOS transcripts in different brain regions. In CSF, minocycline suppressed TNF-α and IL-1β secretion, whereas chloroquine attenuated IL-1β secretion. In gp120-injected animals, activation of ERK1/2 and JNKs was observed in the hippocampus and ERK1/2 activation was significantly reduced by the anti-inflammatory agents. CONCLUSIONS: Our data demonstrate that anti-inflammatory compounds can completely or partially reverse gp120-associated brain inflammation through an interaction with MAPK signaling pathways and suggest their potential role in contributing towards the prevention and treatment of HIV-associated neurological complications.

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Authors
Ashraf, T., Jiang, W., Hoque, M. T., Henderson, J., Wu, C., & Bendayan, R.
Affiliations
University of Toronto (CA)
Corresponding author
Bendayan, Reina
Venue
Journal of Neuroinflammation
Published
2014-05-16
Volume
11
Issue
1
Pages
91-91
ISSN
1742-2094 (ISSN-L)
OpenAlex
W2113451960
Cited by
40
References
53
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 4 · 2022: 2 · 2021: 1 · 2020: 3 · 2019: 9 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 4 · 2014: 2 · 2013: 1
FWCI
1.93
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • TSpace (University of Toronto) (submittedVersion, cc-by)
  • TSpace (University of Toronto) (submittedVersion)
Funders
Ontario HIV Treatment Network
Topics
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Surgery › Infectious Diseases and Tuberculosis
Keywords
HIV-1 gp120, neuroinflammation, anti-inflammatory agents, minocycline, chloroquine, simvastatin, CCR5, CCR5-tropic HIV, IL-1β, TNF-α, inducible nitric oxide synthase, MAPK signaling, ERK1/2, JNK, p38 MAPK, cerebrospinal fluid cytokines, neurological complications of HIV, brain regions
MeSH terms
Animals, Anti-Inflammatory Agents, Brain, Disease Models, Animal, Encephalitis, Enzyme-Linked Immunosorbent Assay, Gene Expression Regulation, Humans, Male, Time Factors, HIV Envelope Protein gp120, Cytokines, Rats, Wistar, Rats

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