- ICH GCP
- Rejestr badań klinicznych w USA
- Badanie kliniczne NCT07656077
Intestinal Tissue-Resident Memory T Cells and HIV-1 Persistence During Antiretroviral Therapy (ANRSGALT-2)
Intestinal Tissue-Resident Memory T Cells in HIV-1 Infection: Mechanisms Involved in Their Depletion and Role in Viral Persistence During Antiretroviral Therapy
Przegląd badań
Status
Interwencja / Leczenie
Szczegółowy opis
Tissue-resident memory T lymphocytes (TRM) are a specialized population of memory T cells that reside permanently within tissues and play a central role in local immune defense. In HIV-1 infection, the intestinal mucosa represents a major site of viral replication, immune dysfunction, and long-term viral persistence despite effective antiretroviral therapy (ART). Intestinal CD4+ T cells are highly susceptible to HIV-1 infection and undergo profound depletion early during infection, while incomplete immune restoration persists under ART.
Emerging evidence suggests that intestinal TRM CD4+ cells may be particularly susceptible to HIV-1 infection and may contribute to the maintenance of viral reservoirs because of their long lifespan and tissue retention properties. In parallel, TRM CD8+ cells may participate in local antiviral immune responses, although their functions may be impaired in the chronic inflammatory environment associated with HIV infection.
The objectives of this physiopathological study are to improve understanding of the mechanisms involved in defective restoration of intestinal TRM populations during suppressive ART and to evaluate the contribution of TRM CD4+ cells to HIV-1 persistence. Exploratory objectives include the phenotypic, transcriptomic, and functional characterization of intestinal TRM CD4+ and CD8+ cells; assessment of the susceptibility of intestinal TRM CD4+ cells to HIV-1 infection; evaluation of their role as viral reservoirs, including intact proviruses; and investigation of mechanisms regulating tissue retention and recirculation of ex-TRM cells in the intestinal mucosa.
This is a monocentric interventional physiopathological study with minimal risks and constraints (RIPH2). The study will enroll 20 people living with HIV-1 receiving suppressive ART and 10 HIV-seronegative controls matched for age and sex. Participants will be recruited among individuals undergoing routine colonoscopy, particularly for colorectal cancer screening indications. Study procedures consist of additional colonic mucosal biopsies collected during the clinically indicated colonoscopy and blood sampling performed on the day of the procedure.
Typ studiów
Zapisy (Szacowany)
Faza
- Nie dotyczy
Kontakty i lokalizacje
Kontakt w sprawie studiów
- Nazwa: Pierre Delobel, MD, PhD
- Numer telefonu: +33 5 61 77 75 08
- E-mail: delobel.p@chu-toulouse.fr
Kopia zapasowa kontaktu do badania
- Nazwa: Marcia Trumeau, MS
- E-mail: marcia.trumeau@anrs.fr
Kryteria uczestnictwa
Kryteria kwalifikacji
Wiek uprawniający do nauki
- Dorosły
- Starszy dorosły
Akceptuje zdrowych ochotników
Opis
I - Inclusion criteria
1 - Group 1: People Living With HIV-1
- Age ≥ 18 years
- Documented HIV-1 infection
- Continuous suppressive antiretroviral therapy initiated during chronic infection for at least 12 months
- Plasma HIV-1 RNA ≤ 50 copies/mL for at least 6 months under ART (one isolated blip ≤ 200 copies/mL allowed)
- Blood CD4+ T-cell count ≥ 350 cells/mm³
- Clinically indicated colonoscopy independent of the research protocol
- Affiliation with a social security system
Written informed consent obtained before any study-specific procedure
2- Group 2: HIV-Seronegative Controls
- Age ≥ 18 years
- HIV-seronegative status
- Clinically indicated colonoscopy independent of the research protocol
- Affiliation with a social security system
- Written informed consent obtained before any study-specific procedure
II - Exclusion Criteria
Group 1: People Living With HIV-1
- HIV-2 infection
- Inflammatory bowel disease (Crohn's disease or ulcerative colitis) or celiac disease
- Platelet count < 50 G/L or uncorrectable coagulation disorders contraindicating biopsies
- Decompensated cirrhosis
- History of lymphoma
- Participation in an HIV vaccine or immunotherapy study
- Pregnant or breastfeeding women
- Participation in another clinical study with an ongoing exclusion period
- Vulnerable individuals, including minors, individuals under guardianship, or persons deprived of liberty
Group 2: HIV-Seronegative Controls
- HIV-1 or HIV-2 infection
- Refusal to undergo HIV serology testing
- Inflammatory bowel disease (Crohn's disease or ulcerative colitis) or celiac disease
- Platelet count < 50 G/L or uncorrectable coagulation disorders contraindicating biopsies
- Decompensated cirrhosis
- History of lymphoma
- Pregnant or breastfeeding women
- Participation in another clinical study with an ongoing exclusion period
- Vulnerable individuals, including minors, individuals under guardianship, or persons deprived of liberty
Plan studiów
Jak projektuje się badanie?
Szczegóły projektu
- Główny cel: Podstawowa nauka
- Przydział: Nielosowe
- Model interwencyjny: Przydział równoległy
- Maskowanie: Brak (otwarta etykieta)
Broń i interwencje
Grupa uczestników / Arm |
Interwencja / Leczenie |
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Eksperymentalny: HIV-1-Infected Participants Receiving Suppressive Antiretroviral Therapy
Participants living with HIV-1 receiving suppressive antiretroviral therapy (ART) and undergoing clinically indicated colonoscopy will undergo blood sampling and additional colonic mucosal biopsies for immunological and virological analyses.
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Collection of blood samples and additional colonic mucosal biopsies during clinically indicated colonoscopy for immunological and virological analyses.
Inne nazwy:
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Eksperymentalny: HIV-Seronegative Controls
HIV-seronegative participants undergoing clinically indicated colonoscopy will undergo blood sampling and additional colonic mucosal biopsies for immunological analyses.
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Collection of blood samples and additional colonic mucosal biopsies during clinically indicated colonoscopy for immunological and virological analyses.
Inne nazwy:
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Co mierzy badanie?
Podstawowe miary wyniku
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
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Frequency and Immunophenotypic Profile of Intestinal CD4+ and CD8+ Tissue-Resident Memory T Cells Measured by Multiparameter Flow Cytometry
Ramy czasowe: Day 1
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Frequency and expression of tissue-resident memory T-cell markers (CD69, CD103, CCR7, S1PR1), differentiation markers (CD45RA/RO, CD27, CD28), survival markers (CD127, TCF-1), activation and exhaustion markers (HLA-DR, CD38, CD57, KLRG1, CD101, PD-1, TIGIT, TIM-3, CD39), and homing markers (CD49d, β7, CCR5, CCR6, CXCR3, CXCR6, CX3CR1) on intestinal CD4+ and CD8+ T cells measured by multiparameter flow cytometry on colonic mucosal biopsy specimens.
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Day 1
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Miary wyników drugorzędnych
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
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Single-Cell Transcriptomic and T-Cell Receptor Repertoire Profiles of Intestinal Tissue-Resident Memory T Cells Measured by CITE-seq
Ramy czasowe: Day 1
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Single-cell transcriptomic profiles and T-cell receptor repertoire of intestinal CD4+ and CD8+ tissue-resident memory T cells measured using Cellular Indexing of Transcriptomes and Epitopes by Sequencing (CITE-seq).
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Day 1
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Total and Intact HIV-1 Proviral DNA Levels in Intestinal CD4+ Tissue-Resident Memory T Cells Measured by Multiplex ddPCR Intact Proviral DNA Assay (IPDA)
Ramy czasowe: Day 1
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Quantification of total and intact HIV-1 proviral DNA in intestinal CD4+ tissue-resident memory T cells isolated from colonic mucosal biopsy specimens using multiplex droplet digital PCR Intact Proviral DNA Assay (IPDA).
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Day 1
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Cytokine Production, Degranulation, and Proliferative Capacity of Intestinal Tissue-Resident Memory T Cells Measured by Functional Flow Cytometry Assays
Ramy czasowe: Day 1
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Production of IL-2, IFN-γ, TNF-α, IL-10, IL-17, granzyme, and perforin, together with proliferative capacity following antigenic stimulation, measured in intestinal tissue-resident memory T cells using functional flow cytometry assays.
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Day 1
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Współpracownicy i badacze
Śledczy
- Główny śledczy: Pierre Delobel, MD, PhD, University Hospital of Toulouse
Daty zapisu na studia
Główne daty studiów
Rozpoczęcie studiów (Szacowany)
Zakończenie podstawowe (Szacowany)
Ukończenie studiów (Szacowany)
Daty rejestracji na studia
Pierwszy przesłany
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy wysłany (Rzeczywisty)
Aktualizacje rekordów badań
Ostatnia wysłana aktualizacja (Rzeczywisty)
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia weryfikacja
Więcej informacji
Terminy związane z tym badaniem
Słowa kluczowe
Dodatkowe istotne warunki MeSH
Inne numery identyfikacyjne badania
- ANRS 00853-R-PR GALT-2
Plan dla danych uczestnika indywidualnego (IPD)
Planujesz udostępniać dane poszczególnych uczestników (IPD)?
Opis planu IPD
Informacje o lekach i urządzeniach, dokumenty badawcze
Bada produkt leczniczy regulowany przez amerykańską FDA
Bada produkt urządzenia regulowany przez amerykańską FDA
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