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Chronic, Acute, and Reactivated HIV Infection in Humanized Immunodeficient Mouse Models
Published on: December 3, 2019
Bone disorders in human immunodeficiency virus infection
1Division of International Medicine and Infectious Diseases, Department of Medicine, Weill Medical College of Cornell University, New York, New York 10021, USA. mag2005@med.cornell.edu
Insights
Human immunodeficiency virus (HIV) infection is linked to significant bone disorders like osteopenia and osteoporosis, impacting bone mineral density (BMD). Further research is needed to understand fracture risks and develop interventions for HIV patients.
Area of Science:
- Bone metabolism and virology
- Immunology and infectious diseases
Background:
- Human immunodeficiency virus (HIV) infection is associated with significant bone disorders, including osteopenia, osteoporosis, and osteonecrosis.
- A high prevalence of reduced bone mineral density (BMD) is observed in HIV-infected patients, even those not on antiretroviral therapy, suggesting HIV itself contributes via immune activation.
Purpose of the Study:
- To summarize the current understanding of bone disorders in HIV-infected patients.
- To highlight the prevalence of reduced BMD and increasing incidence of osteonecrosis.
- To identify gaps in knowledge regarding fracture risk and therapeutic interventions.
Main Methods:
- Review of existing literature on bone disorders in HIV infection.
- Analysis of data on bone mineral density (BMD) in treated and untreated HIV patients.
- Examination of reported cases and risk factors for osteonecrosis in HIV-infected individuals.
Main Results:
- HIV-infected patients, both on and off antiretroviral therapy, exhibit a high prevalence of reduced bone mineral density (BMD).
- The incidence of osteonecrosis in HIV patients appears to be increasing, with corticosteroid use identified as a significant risk factor.
- Controlled studies have not substantiated a link between protease inhibitors and increased osteonecrosis risk.
Conclusions:
- HIV infection itself, through immune activation, contributes to bone density loss.
- Further research is crucial to define fracture risks and develop effective interventions for bone health in HIV patients.
- Understanding the pathogenesis of these bone disorders is essential for improved prevention and treatment strategies.
Abstract:
Osteopenia, osteoporosis, and osteonecrosis are the most significant bone disorders affecting patients with human immunodeficiency virus (HIV) infection. HIV-infected patients receiving potent antiretroviral therapy have a high prevalence of reduced bone mineral density (BMD). However, patients not receiving antiretrovirals also have a higher than expected prevalence of reduced BMD, which suggests that HIV itself may be a contributing factor, mediated by immune activation and cytokines. The risk of fractures remains undefined in this population, and no data exist on interventions to increase BMD and prevent fractures. Osteonecrosis has been reported in HIV-infected patients since 1990, and its incidence appears to be increasing. Available data suggest that corticosteroid use and other risk factors contribute significantly to its pathogenesis. Controlled studies have not supported the contention that protease inhibitors increase the risk of osteonecrosis. An improved understanding of the pathogenesis of these bone disorders should result in better preventative and therapeutic measures.
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