MR-guided focused ultrasound to eradicate CNS viral reservoirs and promote neurogenesis in the HIV-infected brain

MR 引导聚焦超声消除 CNS 病毒库并促进 HIV 感染大脑中的神经发生

• 批准号: 10611332
• 负责人: LINDA CHANG
• 金额: $ 108.15万
• 依托单位: UNIVERSITY OF MARYLAND BALTIMORE
• 依托单位国家: 美国
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2027-04-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10611332
• 关键词: Anti-Retroviral Agents; Award; Binding; Blood - brain barrier anatomy; Brain; CRISPR/Cas technology; Central Nervous System; Clinical; Clinical Trials; DNA; Development; Emerging Technologies; Ensure; Essential Tremor; Focused Ultrasound; HIV; HIV-associated neurocognitive disorder; HIV/AIDS; Human; Maryland; Microglia; National Institute of Drug Abuse; Parkinson Disease; Patients; Pattern; Persons; Pharmaceutical Preparations; Physiologic pulse; Research; Resources; Rodent; Rodent Model; Self Administration; Severities; Source; Subgroup; Substance Use Disorder; Techniques; Translating; Treatment Protocols; Universities; Viral Load result; Viral reservoir; Virus; addiction; antiretroviral therapy; clinical translation; improved; nervous system disorder; neurogenesis; neuroregulation; pre-clinical; prevent; programs; success; targeted delivery

Project Summary: This DP1 application responds to PAR-20-221 “NIDA Avant-Garde Award Program for HIV/AIDS and Substance Use Disorder Research”. The PI, Linda Chang, proposes to tackle a major challenge in the treatment or cure for HIV, namely, the inability of current treatment regimens to eradicate the viral reservoirs, especially those that are protected by the blood brain barrier (BBB) in the central nervous system (CNS). HIV-infected persons who have substance use disorders (SUDs) often have even higher viral loads and suffer from greater severity of HIV- associated neurocognitive disorders (HAND). She proposes to use the emerging technology of MR-guided focused ultrasound (MRgFUS) to safely and transiently open the BBB in order to maximize the delivery of long-acting slow release antiretroviral therapy (LASER ART), and to provide targeted delivery of CRISPR-Cas9 to eliminate the integrated HIV proviral DNA in the CNS viral reservoirs. The combined approach of LASER ART, followed by AAV-CRISPR-Cas9 has shown early successes in subgroups of rodent models, but further optimal delivery of these agents to the CNS is needed. First, HIV-humanized rodent models will be used to demonstrate markedly improved delivery of these agents into the CNS, and the efficacy of eliminating the virus without rebounds. Furthermore, since the same FUS energy and pulse patterns used for BBB opening can also induce neurogenesis and activate microglia, these secondary effects will be evaluated as well. Lastly, due to compelling early preclinical findings with neuromodulation by others, low-intensity MRgFUS as a potential treatment for addiction will also be explored in drug self-administration rodent models. The PI has assembled an outstanding team of collaborators who are experts in each of the techniques and approaches required to ensure the success of the proposed research. Furthermore, since MRgFUS, at higher intensities, is currently being used in the clinical settings to successfully treat patients with essential tremors or Parkinson’s disease, and at different parameters (e.g., pulsed high intensity, low intensity, etc.) and hardware configurations in clinical trials of other neurological disorders, the proposed research has a high potential for clinical translation. Given the available resources and expertise at the University of Maryland, pilot clinical trials may start in years 3-5. In summary, the proposed research to use MRgFUS to maximize the delivery of HIV elimination agents may ultimately eradicate the HIV viral reservoirs, especially those in the CNS, and halt the progression or prevent the development of HAND, particularly for those with SUDs.

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