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A Pilot Feasibility Study of Fibroblast Calcium and Glucoregulation in Health and Disease

24. oktober 2016 opdateret af: Olivier Thibault, PhD, University of Kentucky

A Pilot Feasibility Study of Fibroblast Calcium and Glucoregulation in Health

The purpose of this research is to better understand how calcium and glucose may play a role in people developing diabetes. By doing this study, the investigator hopes to learn whether abnormal calcium and glucose responses in skin biopsies from healthy patients and patients with Type 2 diabetes can identify and predict patients at greatest risk for later complications.

Studieoversigt

Status

Trukket tilbage

Betingelser

Detaljeret beskrivelse

The overall goal of this proposal is to establish a pathophysiological index of a patient's status through imaging of calcium and glucose in skin fibroblasts. The investigator will obtain skin samples from patients in the Barnstable Brown Obesity and Diabetes Center at the University of Kentucky to test the hypothesis that calcium and glucose dysregulation are present in fibroblasts from patients with Type 2 diabetes, and are exaggerated in more difficult-to-treat patients or those with poor glucose control. The innovation of the project focuses on results that can potentially lead to earlier treatment for patients with diabetes and thereby reduce the risk for long-term complications.

Three levels of analyses will be conducted to assess the relationship between Ca2+ and glucose homeostasis in four patient groups (lean non-diabetics, obese non-diabetics, Type 2 Diabetics with good glucose control, and Type 2 Diabetics with poor control.

Participants will be required to attend only one study visit that will last approximately 2-3 hours. During the study subject will undergo the following: 1. Collection of two 4 ml tubes of blood for adiponectin analysis, 2. A skin biopsy, 3. Collection and review of medical history and current/past medication use 4. Collection of demographic information, 5. Height and weight measurement 6. Body mass index evaluation, 7. Vital signs assessment (blood pressure, pulse).

Follow-up for all enrolled patients will occur on a yearly basis through a phone interview.

The punch biopsy will be performed under local anesthesia.

Undersøgelsestype

Observationel

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • Kentucky
      • Lexington, Kentucky, Forenede Stater, 40536
        • University of Kentucky Center for Clinical and Translational Science

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

40 år til 55 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

We will recruit both male and female participants. The age range for this study is 40-55 years old

Beskrivelse

Inclusion Criteria:

  • Healthy
  • Type 2 Diabetes

Exclusion Criteria:

  • Under 40 years of age
  • Over 55 years of age
  • Pregnant or breastfeedig
  • Will not agree to a skin biopsy
  • Talking calcium channel blockers

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Lean Non-Diabetic Group
Variables measured will also include serum analyses (HbA1c, adiponectin, cholesterol) and patient vital signs.
Pre-diabetics
These patients are anticipated to have elevated BMI, yet not be diabetics.
Diabetic Patients
These patients will have good glucose control.
Diabetic patients with poor glucocontrol
These patients are anticipated to have poor glucose control. They are usually taking insulin.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Are peak (nM) calcium responses to bradykinin enhanced along the continuum of disease in skin fibroblasts from the 4 patient groups?
Tidsramme: Three years
All participants groups will be compared statistically to the lean patient group.
Three years

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Are glucose utilization rates (a.u./min) measured in skin fibroblasts from the 4 patient groups different with disease progression?
Tidsramme: Three years
A unitless index of health status based on serum analyses (cholesterol, adiponectin, HbA1c) for each patient will be correlated with a unitless index of glucose status based on fibroblast imaging data.
Three years

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
What component of peripheral metabolic dysregulation (HbA1c (%), adiponectin (ug/mL), cholesterol (mg/dL)) is associated with changes in calcium responses (nM) in skin fibroblasts?
Tidsramme: Three years
The investigator will also focus on two groups of patients, obese-non-diabetics and diabetics with poor control, during the analysis period and prospectively follow these patients for clinical outcomes.
Three years

Samarbejdspartnere og efterforskere

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

Sponsor

University of Kentucky

Samarbejdspartnere

American Diabetes Association

Efterforskere

  • Studieleder: Olivier Thibault, PhD, University of Kentucky

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

1. oktober 2013

Primær færdiggørelse (Forventet)

1. september 2016

Studieafslutning (Forventet)

1. september 2016

Datoer for studieregistrering

Først indsendt

31. juli 2013

Først indsendt, der opfyldte QC-kriterier

6. august 2013

Først opslået (Skøn)

7. august 2013

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

25. oktober 2016

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

24. oktober 2016

Sidst verificeret

1. oktober 2016

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 13-0571-F1V

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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Betingelser

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Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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