Evidence map›Paper›PMID 41697467›Full record

ReviewCurrent HIV/AIDS reports2026

Cytotoxic CD4 T Cells: Dual Agents in HIV-1 Pathogenesis and Persistence.

Kaylee L Mickens, Stephanie M Dillon, Kejun Guo, Cara C Wilson, Mario L Santiago

Abstract readReview
In one paragraph

Review in Current HIV/AIDS reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Kaylee L MickensDepartment of Medicine, University of Colorado Anschutz Medical Campus, Aurora, United States.
Stephanie M DillonDepartment of Medicine, University of Colorado Anschutz Medical Campus, Aurora, United States.
Kejun GuoDepartment of Medicine, University of Colorado Anschutz Medical Campus, Aurora, United States.
Cara C WilsonDepartment of Medicine, University of Colorado Anschutz Medical Campus, Aurora, United States. cara.wilson@cuanschutz.edu.
Mario L SantiagoDepartment of Medicine, University of Colorado Anschutz Medical Campus, Aurora, United States. mario.santiago@cuanschutz.edu.

Funding

Role of Type I IFNs in Mucosal HIV-1 Immunity and PathogenesisR01AI134220 · NIAID · UNIVERSITY OF COLORADO DENVER · PI SANTIAGO, MARIO LUIS, WILSON, CARA C. · 2017 to 2021
$2.7M
Molecular Pathogenesis of Infectious DiseasesT32AI052066 · NIAID · UNIVERSITY OF COLORADO DENVER · PI VAN DYK, LINDA F. · 2002 to 2022
$2.3M
Mechanisms of HIV-associated Gut T Cell DepletionR01AI108404 · NIAID · UNIVERSITY OF COLORADO DENVER · PI WILSON, CARA C. · 2013 to 2017
$2.3M
Gut Cytotoxic CD4 T cells in HIV-1 PathogenesisR01AI145428 · NIAID · UNIVERSITY OF COLORADO DENVER · PI SANTIAGO, MARIO LUIS, WILSON, CARA C. · 2020 to 2024
$2.2M
CTSA Predoctoral T32 at University of Colorado DenverT32TR004367 · NCATS · UNIVERSITY OF COLORADO DENVER · PI Lisa Cicutto · 2023 to 2026
$1.5M
National Institute of Allergy and Infectious Diseases NIH R01 AI145428, AI108404 and AI134220NCATS NIH HHS T32 TR004367NIAID NIH HHS R01 AI108404NIAID NIH HHS R01 AI134220NIAID NIH HHS R01 AI145428NIAID NIH HHS T32 AI052066
6 · The paper itself

Abstract

purpose of reviewCytotoxic CD4 T cells (CD4 CTL) have long been recognized for their potentially protective role in people with HIV, but only recently have their contributions in HIV-1 pathogenesis and viral persistence been appreciated. This review summarizes evidence highlighting their critical role in HIV-1-mediated CD4 T cell depletion and in maintaining the viral reservoir, with special consideration for their abundance and development in the gut. RECENT

findingsCD4 CTL are increased in frequency in people with HIV (PWH). Granzyme B activity in CD4 CTL promotes HIV-1 mediated death of gut CD4 T cells. CD4 CTL that express survival markers such as BCL-2, TNFR2/CD120b, and OX40 appear to resist HIV-1 mediated cell death, potentially contributing to the viral reservoir. Multiple cytokine (IL-2, IL-15) and transcriptional (BACH2, EOMES) pathways were implicated in CD4 CTL differentiation and maintenance. In the gut, CD4 CTL activity appears to be intricately linked to the microbiome, as cytotoxic protein expression can develop in response to bacterial exposure. CD4 CTL from the gut, induced by the presence of bacteria in vitro, are highly infectable by HIV-1. CD4 CTL may act as dual agents in HIV-1 infection, amplifying tissue damage and serving as resilient cellular reservoirs. Understanding the mechanisms regulating their differentiation, cytotoxicity, and survival could inform new therapeutic strategies aimed at restoring gut mucosal integrity, resolving chronic inflammation, and targeting the persistent HIV-1 reservoir.

Indexed as

CD4-Positive T-LymphocytesHIV-1HIV InfectionsT-Lymphocytes, CytotoxicHumansCytotoxic CD4 t cellsGut inflammationGut tissueHIV-1 persistenceHIV-1 reservoirsHIV pathogenesis

Identifiers

PMID41697467
PMCPMC12909476

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.