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Interaction Between Decidual Cells and NK Cells in Endometriosis (PAINLESS)

11. juni 2026 opdateret af: Hopital Foch

Interaction Between Decidual Cells and Natural Killer Cells in Endometriosis: A Prospective Pilot Case-Control Study

Endometriosis is a chronic gynecological disease characterized by the presence of endometrial-like tissue outside the uterus and is frequently associated with pelvic pain and infertility. Increasing evidence suggests that immune dysfunction may contribute to the development and persistence of the disease.

The purpose of this prospective case-control study is to compare immune cell characteristics in women with deep endometriosis and women without endometriosis during the secretory phase of the menstrual cycle. Participants will undergo collection of clinical data, blood samples, endometrial samples, and vaginal microbiota samples. For participants undergoing clinically indicated pelvic surgery, additional biological samples may be collected during the procedure. The study aims to improve understanding of the immune mechanisms involved in endometriosis and to identify potential biomarkers associated with the disease.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Endometriosis affects approximately 10-15% of women of reproductive age and represents a major public health concern. Despite its high prevalence, the pathophysiological mechanisms underlying the disease remain incompletely understood. Increasing evidence suggests that alterations in the immune environment of the endometrium may contribute to the establishment and progression of endometriosis. In particular, uterine immune cells may play a role in regulating local inflammation and tissue homeostasis. Characterizing these immune mechanisms may improve understanding of disease development and identify potential biomarkers associated with endometriosis.

PAINLESS is a prospective, single-center, pilot case-control study conducted at Foch Hospital (Suresnes, France). The study will enroll 50 adult women, including 25 participants with confirmed deep endometriosis and 25 control participants without endometriosis.

Biological samples will be collected during the secretory phase of the menstrual cycle (days 16-24). Depending on clinical management, study procedures may include:

  • Collection of demographic and clinical data
  • Assessment of symptoms and quality of life
  • Blood sampling
  • Endometrial sampling
  • Vaginal microbiota sampling
  • Collection of additional biological specimens during clinically indicated pelvic surgery.

Biological samples will be analyzed to characterize immune cell populations, evaluate soluble immune mediators, investigate associations with hormonal and clinical parameters, and explore biological mechanisms involved in endometriosis.The primary objective is to compare the expression of immune-related markers in endometrial and peritoneal samples obtained from women with endometriosis and controls. Secondary objectives include characterization of immune cell phenotypes and functions, evaluation of immune-related soluble factors, investigation of interactions between immune and endometrial cells, assessment of correlations with hormonal and clinical data, exploratory genetic analyses, and creation of a vaginal microbiota biobank. Results from this pilot study are expected to provide preliminary data for future research aimed at improving the understanding, diagnosis, and management of endometriosis.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

50

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

  • Frankrig
      • Suresnes, Frankrig, 92150
        • Hôpital Foch
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Endometriosis Group
  • Female participant aged 18 years or older.
  • Confirmed diagnosis of deep endometriosis by imaging or surgery.
  • Pelvic pain and/or severe dysmenorrhea (Visual Analog Scale > 4).
  • Premenopausal.
  • No contraceptive or hormonal treatment during the study menstrual cycle.
  • Affiliated with a health insurance system.
  • Able and willing to provide written informed consent.
  • Control Group
  • Female participant aged 18 years or older.
  • No diagnosis of endometriosis.
  • Premenopausal.
  • No contraceptive or hormonal treatment during the study menstrual cycle.
  • No chronic pelvic pain or severe dysmenorrhea (Visual Analog Scale < 4).
  • Affiliated with a health insurance system.
  • Able and willing to provide written informed consent.

Exclusion Criteria:

  • Current infection.
  • Active cancer.
  • Active autoimmune disease.
  • Concomitant hormonal treatment.
  • Pregnancy.
  • Participant under guardianship or legal protection.
  • Participant deprived of liberty.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Endometriosis Group
Adult women with confirmed deep endometriosis undergoing collection of clinical data and biological samples, including blood, endometrial tissue, vaginal microbiota samples, and, when clinically indicated, additional samples collected during pelvic surgery.
Procedure: Biological Sample Collection
Collection of blood samples, endometrial samples, vaginal microbiota samples, and surgical specimens when clinically indicated for immunological and biomarker analyses.
Aktiv komparator: Control Group
Adult women without endometriosis undergoing collection of clinical data and biological samples, including blood, endometrial tissue, vaginal microbiota samples, and, when clinically indicated, additional samples collected during pelvic surgery.
Procedure: Biological Sample Collection
Collection of blood samples, endometrial samples, vaginal microbiota samples, and surgical specimens when clinically indicated for immunological and biomarker analyses.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
CD39 Expression on Natural Killer Cells in Endometrial and Peritoneal Samples
Tidsramme: At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Comparison of CD39 expression on natural killer (NK) cells in endometrial and peritoneal samples collected from women with deep endometriosis and women without endometriosis.
At sample collection during the secretory phase of the menstrual cycle (Days 16-24)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
NK Cell Cytotoxic Function
Tidsramme: At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Assessment of NK cell cytotoxic activity through degranulation markers and cytokine production in biological samples.
At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Endometrial and NK Cell Interactions
Tidsramme: At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Evaluation of interactions between endometrial cells and NK cells using tissue-based analyses.
At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Ex Vivo Modulation of NK Cell Function
Tidsramme: Following sample collection, up to study completion (16 months)
Evaluation of the effects of cytokine stimulation on NK cell function and endometrial cell responses in laboratory assays.
Following sample collection, up to study completion (16 months)
Association Between Hormonal Levels and NK Cell Profile
Tidsramme: At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Correlation of estrogen and progesterone levels with NK cell characteristics and immune markers.
At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Association Between Clinical Characteristics and Immune Markers
Tidsramme: At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Correlation between clinical features of endometriosis and immunological findings.
At sample collection during the secretory phase of the menstrual cycle (Days 16-24)
Genetic Biomarker Associations
Tidsramme: At sample collection and laboratory analysis up to study completion (16 months)
Assessment of associations between genetic markers and immunological findings.
At sample collection and laboratory analysis up to study completion (16 months)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Hopital Foch

Efterforskere

  • Ledende efterforsker: Marie CARBONNEL, MD, Foch hospital

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. juni 2026

Primær færdiggørelse (Anslået)

1. oktober 2027

Studieafslutning (Anslået)

1. oktober 2027

Datoer for studieregistrering

Først indsendt

11. juni 2026

Først indsendt, der opfyldte QC-kriterier

11. juni 2026

Først opslået (Faktiske)

17. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

17. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

11. juni 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2024_0074

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