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Development and Use of Novel SHIVs Bearing Clinically Relevant HIV-1 Envs for Examining HIV Persistence and Eradication in the CNS of Nonhuman Primates

Award Number: R01MH118990
ORGANIZATION: NATIONAL INSTITUTE OF MENTAL HEALTH
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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PROJECT SUMMARY/ABSTRACT In untreated infection, HIV-1 can establish populations in the CNS, often in long-lived myeloid lineage cells. Examining these tissue reservoirs in antiretroviral therapy (ART)-suppressed humans is rarely possible; creating a need for a nonhuman primate (NHP) model that recapitulates many of the features of NeuroHIV in humans. The objective of this study is to develop, and use, a novel simian-human immunodeficiency virus (SHIV) model to examine viral persistence in the CNS during ART and to determine whether CNS reservoirs contribute to viral rebound when ART is stopped. This model will generate CNS disease at a moderate pace, similar to that observed in HIV-infected humans, rather than the extremely rapid pace of most SIV models of NeuroAIDS. We have generated replication competent novel SHIV clones carrying eight different HIV-1 envs, each of which was cloned from either the human CNS, where it was adapted to replicating in myeloid lineage cells (M-SHIVs), or from the human blood, where it was adapted to replicating in CD4+ T cells (R5 T-SHIVs). In addition, we have incorporate newly discovered mutations in env that greatly increase SHIV replication in rhesus macaques. In vivo competition experiments will be used to identify SHIVs that replicate robustly and establish viral populations in the CNS within 1 year of infection (Aim 1). High fitness SHIVs will then be used to test the hypothesis that M- and R5 T-SHIVs are both able to establish reservoirs that persist during ART, but that M-SHIV reservoirs will primarily be found in the CNS, while R5 T-SHIV reservoirs will primarily be found in T cell-rich tissues (lymph nodes and gut) (Aim 2). We will then examine the contribution that these variants make to viral rebound after ART interruption (Aim 3). Successful completion of these aims will both establish a realistic model of HIV-1 CNS disease that can be applied to future studies of eradication and it will expand our knowledge of viral persistence in the CNS by identifying the types of infected cells that persistent during antiretroviral therapy and whether these cells persist as latent or actively replicating reservoirs.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2023 ( Subtotal = $629,961 )
2023	2023	UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL	104 AIRPORT DR STE 2200	CHAPEL HILL	NC	27599	ORANGE	USA	Mental Health Research Grants	000	5	7/18/2023	NON-COMPETING CONTINUATION	$629,961
														Subtotal = $629,961

Issue Date FY: 2022 ( Subtotal = $653,159 )
2022	2022	UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL	104 AIRPORT DR STE 2200	CHAPEL HILL	NC	27599	ORANGE	USA	Mental Health Research Grants	000	4	7/28/2022	NON-COMPETING CONTINUATION	$653,159
														Subtotal = $653,159

Issue Date FY: 2021 ( Subtotal = $621,198 )
2021	2021	UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL	104 AIRPORT DR STE 2200	CHAPEL HILL	NC	27599	ORANGE	USA	Mental Health Research Grants	000	3	7/13/2021	NON-COMPETING CONTINUATION	$621,198
														Subtotal = $621,198

Issue Date FY: 2020 ( Subtotal = $677,839 )
2020	2020	UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL	104 AIRPORT DR STE 2200	CHAPEL HILL	NC	27599	ORANGE	USA	Mental Health Research Grants	001	2	7/20/2020	NON-COMPETING CONTINUATION	$677,839
2020	2019	UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL	104 AIRPORT DR STE 2200	CHAPEL HILL	NC	27599	ORANGE	USA	Mental Health Research Grants	000	1	11/4/2019	NEW	$0
														Subtotal = $677,839

Issue Date FY: 2019 ( Subtotal = $576,341 )
2019	2019	UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL	104 AIRPORT DR STE 2200	CHAPEL HILL	NC	27599	ORANGE	USA	Mental Health Research Grants	000	1	9/13/2019	NEW	$576,341
														Subtotal = $576,341

Grand Total All Awards = $3,158,498

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Development and Use of Novel SHIVs Bearing Clinically Relevant HIV-1 Envs for Examining HIV Persistence and Eradication in the CNS of Nonhuman Primates

Award Number: R01MH118990

ORGANIZATION: NATIONAL INSTITUTE OF MENTAL HEALTH

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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