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Comparison of Hematopoietic Stem Cell Activity in Adipose Tissue From Type 2 Diabetic Patients and Healthy Volunteers (WAT2DO)

1. april 2019 oppdatert av: University Hospital, Toulouse

Comparison of Hematopoietic Stem Cell Activity in Adipose Tissue From Type 2 Diabetic Patients and Healthy Volunteers: Proof of Concept Study. White Adipose Tissue and Type 2 Diabetes Onset: WAT2DO

Based on solid preclinical results in mice and preliminary data in humans, this study aims to provide the proof of concept of the crucial role of the hematopoietic process occurring in human adipose tissue in the initiation of the inflammatory process at the origin of insulin resistance and type 2 diabetes (T2D). The main objective is to compare the number of pro-inflammatory macrophages derived from human adipose tissue hematopoietic stem cells (HSC) according to their origin, type 2 diabetes subjects or healthy volunteers.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

In mice, increasing data demonstrate a causal relationship between the inflammatory process in adipose tissue and the development of insulin resistance, resulting in type 2 diabetes occurrence. However, the mechanisms mediating inflammation and its metabolic consequences are still unclear. In humans, recent publications have suggested an important interaction between the metabolic status and medullar hematopoietic activity. A preliminary study performed by the STROMAlab's research team has identified functional hematopoietic stem cells in human adipose tissue samples, indicating that adipose tissue-hematopoiesis is an active mechanism.

To determine whether an alteration in adipose tissue-hematopoiesis could be a hallmark of type 2 diabetes in human, biopsies of subcutaneous adipose tissue will be performed in 2 groups of 10 volunteers: overweight/obese type 2 diabetes subjects versus healthy volunteers, matched on age.

Then, hematopoietic stem cells extracted from human biopsies will be grafted into immunodeficient mice and after 12 weeks, flow cytometry using antibodies specific for human cell surface markers will be performed to quantify proinflammatory macrophages derived from human adipose tissue-hematopoietic stem cells.

Studietype

Intervensjonell

Registrering (Faktiske)

20

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Frankrike
      • Toulouse, Frankrike, 31059
        • CHU de Toulouse - Rangueil

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

37 år til 63 år (Voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Mann

Beskrivelse

Inclusion Criteria:

  • No major weight variation for at least 3 months
  • Biological assessment without clinically significant anomaly from the point of view of the investigator.
  • Acceptance of constraints related to participation in the study
  • Acceptance of participation in the constitution of a cell bank, a tissue bank and a serum library.
  • Affiliation to a social security scheme.

Type 2 diabetic subjects:

  • Type 2 diabetes (discovered after the age of 35 years, without inaugural ketosis and absence of insulin therapy during the first year).
  • 40 to 60 year-old.
  • BMI between 27 and 35 kg / m² (included).
  • Treated by modification of lifestyle alone or associated to oral anti-diabetic therapy only.
  • With stable oral anti-diabetic treatment for at least 3 months.
  • HbA1c ≤ 8.5%.

Healthy Volunteers:

  • BMI between 23 and 27 kg / m² (included).
  • 37 to 63 year-old, age-matched to a type 2 diabetes subject ± 5 years.
  • Fasting blood glucose < 1,10 g / L.
  • HbA1c within normal limits (4 to 6%).

Exclusion Criteria:

  • Excessive chronic alcohol consumption (> 30 g / day or 210 g / week).
  • Tobacco consumption> 10 cigarettes / day that cannot be stopped for 24 hours.
  • Anti-diabetic treatments that require sub-cutaneous injections
  • History of chronic or acute hematological pathology.
  • Systemic or acute inflammatory pathology.
  • Treatment with antiplatelet agents, non-steroidal anti-inflammatory drugs, glucocorticoids (excluding eye drops and sprays), or other immunosuppressive drugs.
  • History of cancer (except basal cell carcinoma).
  • Allergy to xylocaine or one of its derivatives.
  • Any significant pathology at the discretion of the investigator.
  • Any biological anomaly at the discretion of the investigator.
  • Positive human immunodeficiency virus serology.
  • Positive hepatitis B serology.
  • Positive hepatitis C serology.
  • Glomerular filtration rate less than 60 ml / min
  • Aspartate aminotransferase or alanine aminotransferase higher than 2.5-fold the upper normal value.
  • Hypertriglyceridemia > 2.5 g / l
  • Person under the protection of justice, guardianship or curators.
  • Subject involved in another research protocol or in an exclusion period from another research protocol.
  • Cognitive disorder or mental pathology (at the discretion of the investigator).

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Patients
'Abdominal subcutaneous biopsies and Blood test'
Fremgangsmåte: Abdominal subcutaneous biopsies and Blood test
Abdominal subcutaneous biopsies and blood test for each volunteer.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Number of pro-inflammatory macrophages derived from human adipose tissue in mice transplanted with adipose tissue-hematopoietic stem cells .
Tidsramme: Day 3 - Day 45
The investigators expect that the number of pro-inflammatory macrophages derived from human adipose tissue will be significantly higher in mice transplanted with adipose tissue-hematopoietic stem cells isolated from diabetic subjects compared to those from healthy volunteers.
Day 3 - Day 45

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Comparison of hematopoietic activity in vitro between both groups of subjects.
Tidsramme: Day 3 - Day 45
Evaluated by flow cytometry.
Day 3 - Day 45
Comparison of the number of the other cell types derived from the human adipose tissue-hematopoietic stem cells between both groups of grafted mice.
Tidsramme: Day 3 - Day 45
Evaluated by flow cytometry.
Day 3 - Day 45
Comparison of the phenotype of the other cell types derived from the human adipose tissue-hematopoietic stem cells between both groups of grafted mice.
Tidsramme: Day 3 - Day 45
Evaluated by flow cytometry.
Day 3 - Day 45
Comparison of the expression of genes coding for human inflammatory molecules in the adipose tissue of transplanted mice.
Tidsramme: Day 3 - Day 45
Evaluated by Real-Time Quantitative Reverse Transcription Polymerase Chain Reaction. Main parameters analysed : Interleukin-6, Interleukin-1béta, Plasminogen activator inhibitor-1, Monocyte Chemoattractant Protein-1.
Day 3 - Day 45
Comparison of the metabolic profile of the transplanted mice evaluated by the grafted mice's glycemia.
Tidsramme: Day 3 - Day 45
According to the origin of the grafted hematopoietic stem cells (diabetic or healthy voluntary subjects).
Day 3 - Day 45
Comparison of the metabolic profile of the transplanted mice evaluated by the grafted mice's insulinemia.
Tidsramme: Day 3 - Day 45
According to the origin of the grafted hematopoietic stem cells (diabetic or healthy voluntary subjects).
Day 3 - Day 45
Comparison of the metabolic profile of the transplanted mice evaluated by the grafted mice's oral glucose tolerance test.
Tidsramme: Day 3 - Day 45
According to the origin of the grafted hematopoietic stem cells (diabetic or healthy voluntary subjects).
Day 3 - Day 45

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

University Hospital, Toulouse

Etterforskere

  • Hovedetterforsker: Pierre GOURDY, CHU Toulouse

Publikasjoner og nyttige lenker

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Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

28. juni 2018

Primær fullføring (Faktiske)

24. januar 2019

Studiet fullført (Faktiske)

24. januar 2019

Datoer for studieregistrering

Først innsendt

27. juli 2017

Først innsendt som oppfylte QC-kriteriene

21. august 2017

Først lagt ut (Faktiske)

24. august 2017

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

2. april 2019

Siste oppdatering sendt inn som oppfylte QC-kriteriene

1. april 2019

Sist bekreftet

1. april 2019

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • RC31/15/7739
  • 2017-A01697-46 (Annen identifikator: ID-RCB)

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

Nei

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Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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