HIV-associated neurocognitive disorder

HIV-associated neurocognitive disorders
Other namesAIDS dementia complex (ADC), Brain AIDS, HIV dementia, HIV-associated dementia (HAD), HIV encephalopathy, mild neurocognitive disorder (MND), asymptomatic neurocognitive disorder (AND)
SpecialtyInfectious disease, neurology

HIV-associated neurocognitive disorders (HAND) are neurological disorders associated with HIV infection and AIDS. It is a syndrome of progressive deterioration of memory, cognition, behavior, and motor function in HIV-infected individuals during the late stages of the disease, when immunodeficiency is severe.[1] HAND may include neurological disorders of various severity. HIV-associated neurocognitive disorders are associated with a metabolic encephalopathy induced by HIV infection and fueled by immune activation of macrophages and microglia.[2] These cells are actively infected with HIV and secrete neurotoxins of both host and viral origin. The essential features of HIV-associated dementia (HAD) are disabling cognitive impairment accompanied by motor dysfunction, speech problems and behavioral change.[3] Cognitive impairment is characterised by mental slowness, trouble with memory and poor concentration. Motor symptoms include a loss of fine motor control leading to clumsiness, poor balance and tremors. Behavioral changes may include apathy, lethargy and diminished emotional responses and spontaneity. Histopathologically, it is identified by the infiltration of monocytes and macrophages into the central nervous system (CNS), gliosis, pallor of myelin sheaths, abnormalities of dendritic processes and neuronal loss.[2][4]

HAD typically occurs after years of HIV infection and is associated with low CD4+ T cell levels and high plasma viral loads. It is sometimes seen as the first sign of the onset of AIDS. Prevalence is between 10 and 24% in Western countries[5] and has only been seen in 1–2% of India-based infections.[6][7] With the advent of highly active antiretroviral therapy (HAART), the incidence of HAD has declined in developed countries, although its prevalence is increasing.[8][9] HAART may prevent or delay the onset of HAD in people with HIV infection, and may also improve mental function in people who already have HAD.

Dementia only exists when neurocognitive impairment in the patient is severe enough to interfere markedly with day-to-day function. That is, the patient is typically unable to work and may not be able to take care of themselves. Before this, the patient is said to have a mild neurocognitive disorder.

  1. ^ Lynn, D. Joanne, Newton, Herbert B. and Rae-Grant, Alexander D. eds. 5-Minute Neurology Consult, The. 2nd Edition. Two Commerce Square, 2001 Market Street, Philadelphia, PA 19103 USA: Lippincott Williams & Wilkins, 2012. Books@Ovid. Web. 03 December, 2020.http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=books1&NEWS=N&AN=01626619%2f2nd_Edition%2f2.
  2. ^ a b Gray F, Adle-Biassette H, Chretien F, Lorin de la Grandmaison G, Force G, Keohane C (2001). "Neuropathology and neurodegeneration in human immunodeficiency virus infection. Pathogenesis of HIV-induced lesions of the brain, correlations with HIV-associated disorders and modifications according to treatments". Clinical Neuropathology. 20 (4): 146–55. PMID 11495003.
  3. ^ "HIV-Associated Dementia - Neurologic Disorders". MSD Manual Professional Edition.
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  5. ^ Grant I, Sacktor H, McArthur J (2005). "HIV neurocognitive disorders" (PDF). In Gendelman HE, Grant I, Everall I, Lipton SA, Swindells S (eds.). The Neurology of AIDS (2nd ed.). London, UK: Oxford University Press. pp. 357–373. ISBN 978-0-19-852610-0. Archived from the original (PDF) on 2009-09-23. Retrieved 2006-04-06.
  6. ^ Satishchandra P, Nalini A, Gourie-Devi M, Khanna N, Santosh V, Ravi V, et al. (January 2000). "Profile of neurologic disorders associated with HIV/AIDS from Bangalore, south India (1989-96)". The Indian Journal of Medical Research. 111: 14–23. PMID 10793489.
  7. ^ Wadia RS, Pujari SN, Kothari S, Udhar M, Kulkarni S, Bhagat S, Nanivadekar A (March 2001). "Neurological manifestations of HIV disease". The Journal of the Association of Physicians of India. 49: 343–8. PMID 11291974.
  8. ^ Ellis R, Langford D, Masliah E (January 2007). "HIV and antiretroviral therapy in the brain: neuronal injury and repair". Nature Reviews. Neuroscience. 8 (1): 33–44. doi:10.1038/nrn2040. PMID 17180161. S2CID 12936673.
  9. ^ Cite error: The named reference Gonzalez was invoked but never defined (see the help page).