- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT07585994
Effect of 4 Weeks of Oral Probiotic Desulfovibrio Piger Supplementation on Immunological and Metabolic Parameters in Individuals With Longstanding Type 1 Diabetes (PROSPER)
연구 개요
상세 설명
The investigators perform a double-blind, randomized, placebo-controlled trial with two arms (10 participants per arm, total of 20 participants) in adults with longstanding type 1 diabetes with residual beta cell function. The study duration is 6 weeks, with 4 weeks of intervention in which participants will be given D. piger or placebo once daily and 2 weeks of washout period. The main study enpoints include the changes (versus baseline) in parameters of systemic/intestinal inflammation and beta cell function between the placebo and D.piger-treatment arms at the end of treatment (4 weeks). In addition, any long-lasting effects will be determined by assessing the changes in the above described markers after a 2 week washout period (6 weeks).
Secondary endpoints include glucose variability (continuous glucose monitoring, CGM), fecal microbiome composition (including strain engraftment of D. piger, plasma metabolites), immune cell phenotype and frequency and validated questionnaires (gastro-intestinal complaints) at these three timepoints (0,4,6 weeks).
연구 유형
등록 (추정된)
단계
- 해당 없음
연락처 및 위치
연구 연락처
- 이름: Max Nieuwdorp, Prof. Dr.
- 전화번호: +31 20-5669111
- 이메일: m.nieuwdorp@amsterdamumc.nl
연구 장소
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-
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Amsterdam, 네덜란드, 1105 AZ
- 모병
- Amsterdam UMC
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연락하다:
- Max Nieuwdorp, Prof. Dr.
- 전화번호: +31 20-5669111
- 이메일: m.nieuwdorp@amsterdamumc.nl
-
Amsterdam, 네덜란드, 1066 EC
- 모병
- Diabeter Centrum Amsterdam
-
연락하다:
- Max Nieuwdorp, Prof. Dr.
- 전화번호: +31 20-5669111
- 이메일: m.nieuwdorp@amsterdamumc.nl
-
-
참여기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
설명
Inclusion Criteria:
- Males or females, age >18 years
- A diagnosis of type 1 diabetes, with duration of more than 5 years, with minimally one of antiGAD65, IA2, ZnT8 autoantibodies present assessed at diagnosis or routine visits at Diabeter Centrum.
- Evidence of remaining residual beta cell function with detectable UCPCR (more than 0.01 nmol/mmol C-peptide/creatinine ratio) and or fasting plasma C-peptide more than 0.2 mmol/L.
- BMI 18-30 kg/m2
Exclusion Criteria:
- Use of antibiotics or proton-pump inhibitors within the last three months before screening or during study period
- Use of other probiotic supplementation within the last month before screening or during study period
- A history of cholecystectomy
- Overt untreated gastrointestinal disease, inflammatory bowel disease or abnormal bowel habits
- Absence of a large bowel (ie colostomy)
- Evidence for comprised immunity (HIV infection, chemotherapy, other autoimmune diseases, systemic anti-inflammatory therapy)
- History of cardiovascular disaeses (CVD) events
- Hepatic enzymes>2.5 higher than the upper limit of normal range, determined during MARVEL visits/routine visits
- Kidney failure (eGFR <15ml.min/1.73m2), dialysis, kidney transplantation,
- Inability or unwillingness to donate feces or urine.
- Smoking or illicit drug use (e.g. MDMA/amphetamine/cocaine/heroin/GHB) in the past three months or use during the study period.
- Alcohol abuse (equal or above 21 units per week)
- Inability or unwillingness to provide informed consent.
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 치료
- 할당: 무작위
- 중재 모델: 병렬 할당
- 마스킹: 삼루타
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
|---|---|
|
실험적: Probiotic Desulfovibrio piger
Probiotic bacteria D. piger (10^9 colony forming units (CFU) in 10ml PBS containing 10% glycerol and 10% maltodextrin)
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Probiotic bacteria D. piger (10^9 colony forming units (CFU) in 10ml PBS containing 10% glycerol and 10% maltodextrin)
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|
위약 비교기: Placebo
placebo (10ml PBS containing 10% glycerol and 10% maltodextrin)
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Placebo (10ml PBS containing 10% glycerol and 10% maltodextrin)
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Parameters of systemic and intestinal inflammation
기간: From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
|
systemic inflammation determined by measuring plasma CRP, and proinflammatory cytokines (IFNgamma, IFN alpha, TNFalpha) intestinal inflammation assessed by LB, iFABP, zonulin in plasma |
From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Residual beta cell function
기간: From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Assessed by C peptide AUC during mixed meal tolerance test and/or post meal urine C-peptide/creatinine ratio levels.
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From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Glucose variability
기간: From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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percentage time in euglycemic range, time above range, time below range and glucose variability measured by continuous glucose monitoring (CGM)
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From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Immune cell phenotypes and frequency
기간: From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Immunophenotyping by flow cytometry of PBMC (peripheral blood mononuclear cells) to determine frequency of T cell subsets with activation/exhaustion marker expression
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From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Fecal microbiome composition and strain engraftment
기간: From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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using 16s rRNA sequencing, primer-specific quantitative PCR for D. piger detection in feces and plasma metabolites
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From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Gastrointestinal Symptom Rating Scale (GSRS)
기간: From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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Questionnaire.
The minimum and maximum score are 15 and 105 points respectively, and a higher score in the scale reflects more gastro-intestinal complaints.
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From start treatment to the end of treatment at 4 weeks and washout at 6 weeks.
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공동 작업자 및 조사자
수사관
- 수석 연구원: Max Nieuwdorp, Prof. Dr., Amsterdam UMC
연구 기록 날짜
연구 주요 날짜
연구 시작 (추정된)
기본 완료 (추정된)
연구 완료 (추정된)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
기타 연구 ID 번호
- 2025.1139
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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