- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT02148471
Fatty Acids, Genes and Microbiota in Fatty Liver
Non-alcoholic Steatohepatitis Versus Simple Hepatic Steatosis: Is There a Difference in the Nutritional Factors Influencing Lipid Perioxidation and Inflammation?
연구 개요
상태
상세 설명
NASH is associated with obesity, diabetes and hyperlipidemia. Fat accumulation in the liver is likely due to variable degrees of disordered fatty-acid metabolism and insulin resistance (IR). Liver steatosis, especially polyunsaturated fatty acids (PUFA) in the liver, increases lipid peroxidation and is associated with a reduction in the antioxidant defense system. This oxidative stress can lead to increased production of pro-inflammatory cytokines (TNF-α, transforming growth factor-beta) contributing to the development of steatohepatitis and fibrosis.TNF-α - may further contribute to IR. In addition, changes in fatty acid composition within the liver may influence lipid metabolism and inflammation. In particular, n-3 PUFA have an effect on the insulin sensitivity, transcription of antioxidant genes, inflammatory response and production of reactive oxygen species. Differences might be seen on the gene expression level (mRNA) and also in epigenetic regulation (miRNA).
Microbiota composition might influence energy metabolism, and inflammatory tone and IR through increased endotoxemia and therefore could also play a role in the development of NAFLD.
연구 유형
등록 (실제)
연락처 및 위치
연구 장소
-
-
Ontario
-
Toronto, Ontario, 캐나다, M5G 1Z5
- Toronto General Hospital
-
-
참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
설명
Inclusion criteria:
- Male and female patients, age >18 y
- A liver biopsy with a diagnosis of SS or NASH OR No signs of steatosis, fibrosis or any other kind of liver disease on histology (minimal findings) OR For healthy control subjects, those with normal liver enzymes and normal liver imaging on ultrasound
- alcohol consumption (<20g of ethanol per day);
- absence of any other possible cause for liver dysfunction.
Exclusion criteria:
- any other liver disease apart from NAFLD
- anticipated need for liver transplantation in one year or complications of liver disease;
- any reasons contraindicating a liver biopsy (patients) or liver donation (healthy donors)
- chronic gastrointestinal diseases, previous gastrointestinal surgery modifying the anatomy, patients with diabetes requiring insulin.
- medications known to precipitate steatohepatitis (corticosteroids, high dose estrogens, methotrexate, amiodarone, spironolactone, sulfasalazine, perhexiline maleate, diethylamino- ethoxyhexestrol (DH), tamoxifen, diethylstilbestrol, naproxen or oxacillin) or regular intake of non-steroidal anti-inflammatory drugs (except for low dose aspirin), use of ursodeoxycholic acid or any experimental drug in the 6 months prior to entry.
- regular intake of prebiotics, probiotics, antibiotics, or laxatives; in the 3 months prior to study entry
- Pregnant or lactating
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 관찰 모델: 보병대
- 시간 관점: 단면
코호트 및 개입
그룹/코호트 |
|---|
|
Healthy controls
Healthy living liver donors with healthy liver on imaging and/or liver histology
|
|
Simple steatosis
Patients with non-alcoholic fatty liver disease confirmed by liver biopsy with a diagnosis of simple steatosis
|
|
Nonalcoholic steatohepatitis
Patients with non-alcoholic fatty liver disease confirmed by liver biopsy with a diagnosis of steatohepatitis
|
|
Minimal findings
Patients undergoing liver biopsy because of suspected fatty liver but nonspecific findings on liver histology.
This group was initially used as a control group.
Later in the study, this group was replaced by healthy donors as true healthy controls.
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Hepatic fatty acid composition in total lipids in liver biopsy
기간: Baseline
|
Gas chromatography
|
Baseline
|
|
Hepatic gene expression
기간: Baseline
|
mRNA by microarray
|
Baseline
|
|
Intestinal microbiota composition
기간: Baseline
|
Illumina 16S technology
|
Baseline
|
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Lipid peroxides in the liver
기간: Baseline
|
Test kit
|
Baseline
|
|
Hepatic liver antioxidant power
기간: Baseline
|
Test kit
|
Baseline
|
|
Hepatic microRNA expression in the liver
기간: Baseline
|
NanoString
|
Baseline
|
|
Intestinal microbiota - specific organisms and groups
기간: Baseline
|
Quantitative real-time polymerase chain reaction
|
Baseline
|
|
Intestinal microbiome on a genetic level
기간: Baseline
|
Illumina sequencing technology
|
Baseline
|
|
Short-chain fatty acids in stool
기간: Baseline
|
Gas chromatography
|
Baseline
|
|
Plasma endotoxin
기간: Baseline
|
Limulus assay
|
Baseline
|
기타 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Hepatic phospholipid composition
기간: Baseline
|
Gas chromatography
|
Baseline
|
|
Red blood cell fatty acid and phospholipid composition
기간: Baseline
|
Gas chromatography
|
Baseline
|
|
Plasma fatty acid composition
기간: Baseline
|
Gas chromatography
|
Baseline
|
|
Plasma lipid peroxides
기간: Baseline
|
Test kit
|
Baseline
|
|
Plasma antioxidant vitamins
기간: Baseline
|
Vitamin C colorimetric, alpha- and gamma-tocopherol and beta-carotene by high-performance liquid chromatography
|
Baseline
|
|
Serum antioxidant power
기간: Baseline
|
Test kit
|
Baseline
|
|
TNF-alpha in the liver
기간: Baseline
|
Enzyme linked immunosorbent assay
|
Baseline
|
|
Immunohistochemistry
기간: Baseline
|
Staining for malondialdehyde, alpha-smooth muscle actin, transforming growth factor beta
|
Baseline
|
|
Free choline in serum
기간: Baseline
|
liquid chromatography/electrospray ionization-isotope dilution mass spectrometry (LC/ESI-IDMS)
|
Baseline
|
|
Bacterial DNA in plasma
기간: Baseline
|
Quantitative polymerase chain reaction for bacterial 16S rDNA
|
Baseline
|
|
Insulin resistance
기간: Baseline
|
Fasting glucose and insulin to calculate insulin resistance (HOMA-IR), C-peptide, hemoglobin A1c, all by standard laboratory methods
|
Baseline
|
|
Plasma ethanol
기간: Baseline
|
standard laboratory measurement
|
Baseline
|
|
Anthropometry
기간: Baseline
|
Weight, height, skinfolds, bioelectrical impedance analysis
|
Baseline
|
|
Food intake
기간: Baseline
|
7-day food records
|
Baseline
|
|
Physical activity
기간: Baseline
|
7 day activity logs
|
Baseline
|
|
Factors influencing intestinal microbiota
기간: Baseline
|
Environmental questionnaire
|
Baseline
|
|
Liver function tests
기간: Baseline
|
Alanine transaminase, aspartate transaminase, alkaline phosphatase, standard laboratory tests
|
Baseline
|
공동 작업자 및 조사자
스폰서
협력자
수사관
- 수석 연구원: Johane Allard, MD,FRCPC, University Health Network, Toronto
간행물 및 유용한 링크
일반 간행물
- Schwenger KJ, Allard JP. Clinical approaches to non-alcoholic fatty liver disease. World J Gastroenterol. 2014 Feb 21;20(7):1712-23. doi: 10.3748/wjg.v20.i7.1712.
- Monteiro J, Leslie M, Moghadasian MH, Arendt BM, Allard JP, Ma DW. The role of n - 6 and n - 3 polyunsaturated fatty acids in the manifestation of the metabolic syndrome in cardiovascular disease and non-alcoholic fatty liver disease. Food Funct. 2014 Mar;5(3):426-35. doi: 10.1039/c3fo60551e.
- Mouzaki M, Allard JP. The role of nutrients in the development, progression, and treatment of nonalcoholic fatty liver disease. J Clin Gastroenterol. 2012 Jul;46(6):457-67. doi: 10.1097/MCG.0b013e31824cf51e.
- Mouzaki M, Allard J. Non-alcoholic steatohepatitis: the therapeutic challenge of a global epidemic. Ann Gastroenterol. 2012;25(3):207-217.
- Da Silva HE, Arendt BM, Noureldin SA, Therapondos G, Guindi M, Allard JP. A cross-sectional study assessing dietary intake and physical activity in Canadian patients with nonalcoholic fatty liver disease vs healthy controls. J Acad Nutr Diet. 2014 Aug;114(8):1181-94. doi: 10.1016/j.jand.2014.01.009. Epub 2014 Mar 14.
- Arendt BM, Ma DW, Simons B, Noureldin SA, Therapondos G, Guindi M, Sherman M, Allard JP. Nonalcoholic fatty liver disease is associated with lower hepatic and erythrocyte ratios of phosphatidylcholine to phosphatidylethanolamine. Appl Physiol Nutr Metab. 2013 Mar;38(3):334-40. doi: 10.1139/apnm-2012-0261. Epub 2012 Oct 15.
- Mouzaki M, Comelli EM, Arendt BM, Bonengel J, Fung SK, Fischer SE, McGilvray ID, Allard JP. Intestinal microbiota in patients with nonalcoholic fatty liver disease. Hepatology. 2013 Jul;58(1):120-7. doi: 10.1002/hep.26319. Epub 2013 May 14.
- Allard JP, Aghdassi E, Mohammed S, Raman M, Avand G, Arendt BM, Jalali P, Kandasamy T, Prayitno N, Sherman M, Guindi M, Ma DW, Heathcote JE. Nutritional assessment and hepatic fatty acid composition in non-alcoholic fatty liver disease (NAFLD): a cross-sectional study. J Hepatol. 2008 Feb;48(2):300-7. doi: 10.1016/j.jhep.2007.09.009. Epub 2007 Nov 20.
- Arendt BM, Comelli EM, Ma DW, Lou W, Teterina A, Kim T, Fung SK, Wong DK, McGilvray I, Fischer SE, Allard JP. Altered hepatic gene expression in nonalcoholic fatty liver disease is associated with lower hepatic n-3 and n-6 polyunsaturated fatty acids. Hepatology. 2015 May;61(5):1565-78. doi: 10.1002/hep.27695. Epub 2015 Feb 27.
- Pettinelli P, Arendt BM, Schwenger KJP, Sivaraj S, Bhat M, Comelli EM, Lou W, Allard JP. Relationship Between Hepatic Gene Expression, Intestinal Microbiota, and Inferred Functional Metagenomic Analysis in NAFLD. Clin Transl Gastroenterol. 2022 Jul 1;13(7):e00466. doi: 10.14309/ctg.0000000000000466. Epub 2022 Feb 10.
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (실제)
연구 완료 (실제)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (추정)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
미국에서 제조되어 미국에서 수출되는 제품
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .