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MoMa Signature During Granulomatosis

Study Purpose

Sarcoidosis is a systemic inflammatory disease characterized by unspecific granuloma formation. Our hypothesis is that granuloma formation and maintenance mainly relies on the overactivation of monocytes (Mo) and macrophages (Ma). To this end, the study aims (i) to define MoMa systemic signature in sarcoidosis, (ii) to characterize this signature in situ on tissue samples, and (iii) to identify causative factors that participate to the MoMa chronic overactivation. Thus, a cohort of sarcoidosis patients will be compared with tuberculosis patients. The MoMa systemic signature will be defined on whole blood (TruCulture model) and then in situ through different methods (multi-parameter spectral flow cytometry, RNA-seq, Luminex, imaging mass cytometry). The epigenome of monocytes will be studied thanks to CUT&Tag. The MoMa systemic signature will be defined ex vivo at different time points during the course of the disease with phenotypic, transcriptomic, cytokine and functional approaches. The previously identified signature will be studied in situ and completed by the characterization of granuloma architecture and microenvironmental interactions, which could be modulated by epigenetic modifications. Hence, the epigenome of monocytes will be analyzed in two groups (sarcoidosis and tuberculosis). These results would allow to better understand sarcoidosis physiopathology and, in fine, may raise new therapeutic strategies. Finally, the study could challenge the dogma on innate immunity/auto-inflammation versus adaptive immunity/auto-immunity/memory.

Recruitment Criteria

Accepts Healthy Volunteers Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms	No
Study Type An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies.	Observational
Eligible Ages	18 Years and Over
Gender	All

More Inclusion & Exclusion Criteria

Inclusion criteria:

1. Male and female > 18 years old. 2. Diagnosis of sarcoidosis and of tuberculosis. 3. Affiliated to medical insurance.

Exclusion criteria:

1. HIV infection. 2. pregnant or breastfeeding woman. 3. Patient under legal protection, guardianship or curators. 4. Absence of signed consent"

Trial Details

Trial ID: This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.	NCT05916638
Phase Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	Assistance Publique - Hôpitaux de Paris
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	Karim SACRE, MD-PhD, PU-PH
Principal Investigator Affiliation	Assistance Publique - Hôpitaux de Paris
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Other
Overall Status	Recruiting
Countries	France
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Sarcoidosis, Tuberculosis

Additional Details

"Sarcoidosis is an inflammatory disease characterized by the presence of coalescing, tightly clustered, non-necrotizing granulomas. The diagnosis is based on three major criteria: a compatible clinical presentation, the presence of non-necrotizing granulomatous inflammation, and the exclusion of alternative granulomatous diseases. A wide range of clinical phenotypes are observed depending on the location of the granulomatous lesions which can affect any organ, with the lungs being the most affected site. Sarcoidosis shares many similarities with tuberculosis, in which granuloma formation is triggered by Mycobacterium tuberculosis (M. tb). These phenotypic similarities between the two diseases present many challenges for diagnosis, clinical management and therapy. Our understanding of the factors that contribute to sarcoidosis development, granuloma formation and maintenance remains limited. Part of this challenge is that granuloma development may involve both environmental and genetic factors, which contribute to the recruitment of immune cells to form the granuloma. Immune cells involved in the granuloma include

(1) CD4 Th1 and Th17 T cells and their associated cytokines (e.

g, IFNγ, TNFα, IL-17, IL-2); and

(2) monocytes (Mo) and macrophages (Ma) including proinflammatory M1 and pro-fibrosis M2 types.

However, the specific factors that contribute to granuloma maintenance and evolution remain to be identified. Among them, we can hypothesized that trained immunity, persistence of the antigen, or the microenvironment are involved in this chronic dysregulated immune response. Such an improved understanding of the pathophysiology of the disease may allow development of new treatments, as currently corticosteroids remain the mainstay of therapy. Our main hypothesis is that granuloma formation and maintenance mainly relies on the overactivation of monocytes (Mo) and macrophages (Ma). To this end, the study aims (i) to define MoMa systemic signature in sarcoidosis, (ii) to characterize this signature in situ on tissue samples, and (iii) to identify causative factors that participate to the MoMa chronic overactivation. Thus, a cohort of sarcoidosis patients will be compared with tuberculosis patients. The MoMa systemic signature will be defined on whole blood (TruCulture model) and then in situ through different methods (multi-parameter spectral flow cytometry, RNA-seq, Luminex, imaging mass cytometry). The epigenome of monocytes will be studied thanks to CUT&Tag. The MoMa systemic signature will be defined ex vivo at different time points (M0, M6 and M12) during the course of the disease with phenotypic, transcriptomic, cytokine and functional approaches. The previously identified signature will be studied in situ and completed by the characterization of granuloma architecture and microenvironmental interactions, which could be modulated by epigenetic modifications. Hence, the epigenome of monocytes will be analyzed in two groups (sarcoidosis and tuberculosis). These results would allow to better understand sarcoidosis physiopathology and, in fine, may raise new therapeutic strategies. Finally, the study could challenge the dogma on innate immunity/auto-inflammation versus adaptive immunity/auto-immunity/memory."

Arms & Interventions

Arms

: Sarcoidosis

patients diagnosed with sarcoidosis

: Tuberculosis

patients diagnosed with tuberculosis

Interventions

Other: - blood sample

blood sample collection

Contact a Trial Team

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