Simple Steatosis (SS)NCT02158351
Gut Microbiota and Modulation of Liver Damage in NAFLD
An observational study of Simple Steatosis (SS) and Non-alcoholic Steatohepatitis (NASH), run by University of Roma La Sapienza at 1 site in Italy.
Trial summary
Several experimental data suggest that gut-derived endotoxin and GM composition can act as a "second hit" or insult to convert hepatic SS to NASH and cause both local hepatic and systemic inflammation.This study's aim is to analyze microbiota diversity, providing information both on intestinal microbial composition… Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Simple Steatosis (SS), Non-alcoholic Steatohepatitis (NASH), Obesity
- What is being tested?
- liver and white adipose tissue biopsies
- Type of treatment
- Surgery or procedure
- How many people
- 44 participants
- Where
- 1 siteItaly
- Study dates
- Nov 2013to Oct 2017
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: two groups of patients with morbid obesity undergoing sleeve gastrectomy will be enrolled. Grouping in patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH) will be performed based on the histological diagnosis of the type of NAFLD obtained at operation. Two groups of non-obese patients undergoing cholecystectomy for gallstone disease will be enrolled. Grouping in patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH) will be performed based on the histological diagnosis of the type of NAFLD obtained at operation.
Who may be able to join
- Male or female, equal or over 18 years old
- Eligible for Sleeve Gastrectomy for obesity with BMI 35-50 kg/m2
- Eligible for Cholecystectomy for symptomatic gallstones and bright liver at ultrasounds
- Alcohol consumption is less than 20 g/d
Who cannot join
- Having liver disease of other etiology
- Having advanced liver disease
- Having abnormal coagulation or other reason contraindicating a Liver Biopsy
- On regular intake of medications known to cause or exacerbate steatohepatitis or antibiotic, pre- or probiotics in the previous 3 months
- Use of vitamin E or fish oil supplements in the previous 2 months
- Alcohol consumption of more than 20 g/dl
Show all 9Show fewer
- Inflammatory bowel diseases
- previous gastrointestinal surgery modifying the anatomy (prior to bariatric surgery)
- Pregnancy or lactating state
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Role and Pathogenetic Mechanisms of Intestinal Microbiota in Non-alcoholic Fatty Liver Disease Severity in Obese and Non-obese Subjects
Several experimental data suggest that gut-derived endotoxin and GM composition can act as a "second hit" or insult to convert hepatic SS to NASH and cause both local hepatic and systemic inflammation.This study's aim is to analyze microbiota diversity, providing information both on intestinal microbial composition and on the metabolic processes linked to them. In addition, we will correlate, for the first time, GM composition to hepatic and white adipose tissue gene expression patterns of interest and serum and fecal markers possibly related to impaired fat storage and inflammation. We aim to provide preliminary data to design future intervention studies with pre- or probiotics or bile acid derivatives to prevent/treat inflammation and fibrosis in NAFLD patients.
Read the detailed description
Non-alcoholic fatty liver disease (NAFLD) includes benign hepatic simple steatosis (SS) and the more severe steatohepatitis (NASH), which is characterized by inflammation and fibrosis potentially leading to cirrhosis and hepatocellular carcinoma. Current research is focused on what are the risk factors and determinants of NASH. NAFLD is associated with the metabolic syndrome, and the prevalence has been described to be up to 98% in morbidly obese individuals undergoing bariatric surgery. NAFLD in non-obese subjects have a different clinical profile than in obese individuals, being associated with insulin resistance (IR), differential distribution of visceral adipose tissue, recent increase in body weight and/or presence of overweight, intake of high cholesterol diet and genetic background.
Gut microbiota (GM) regulates fat metabolism in mice. In humans its alterations have been linked to diabetes, obesity, IR, atherosclerosis and inflammation, SS and NAFLD.
Several experimental data suggest that gut-derived endotoxin and GM composition can act as a "second hit" or insult to convert hepatic SS to NASH and cause both local hepatic and systemic inflammation. With regard to human studies, Muozaki et al. have recently showed, by using a polymerase chain reaction (PCR) TaqMan system approach, that obese patients with NASH, have a lower percentage of fecal Bacteroidetes (Bacteroidetes to total bacteria counts) compared to both SS and healthy controls and a higher percentage of C. coccoides compared to those with SS . In addition, Zhu et al. showed in pediatric subjects, by using a 16S ribosomal RNA detection method, an unique pattern of enterotypes in patients with NASH, in obese individuals with no sign of liver damage and in lean healthy controls. Finally, Wai-Sun Wong et al. showed, also using a 16S ribosomal RNA detection method, that a small group of Chinese NASH patients demonstrated fecal dysbiosis but not significant changes in biodiversity compared to healthy subjects. Finally, inflammation in patients with symptomatic atherosclerosis has been shown to be associated with lower levels of butyrate producing gut bacteria such as Roseburia.
Among the possible factors involved in determining NAFLD severity, serum bile acid (BA) concentration and its post-prandial variations have been recently linked to the regulation of body weight, liver fat and inflammation and glucose and lipid metabolism. These BA regulatory functions are mediated by their interaction with the farnesoid X receptor (FXR)and the G Protein-Coupled BA Receptor 1 (GPBAR1 or TGR5) at both hepatic and subcutaneous adipose tissue levels. No human study has been directed to investigating the mechanisms through which GM composition influences inflammation and fibrosis in both obese and non-obese patients with NAFLD.
Liver biopsy is clinically advisable during bariatric surgery, due to the high prevalence of NAFLD and NASH in morbidly obese patients. It has been previously suggested that the high prevalence of histologically proven NAFLD in patients with gallstones may also justify routine liver biopsy during cholecystectomy, even in non-obese subjects, to establish the diagnosis, stage, and possible therapy. The latter suggestion has been very recently reinforced by the evidence that, in humans, cholecystectomy may represent an independent risk factor for NAFLD detected at ultrasounds and by the experimental demonstration that cholecystectomy increases hepatic triglycerides content.
In the present research project we will study patients with histologically proven SS or with NASH. Liver biopsy will be performed during bariatric surgery (sleeve gastrectomy) or cholecystectomy in patients with preoperative evidence of NAFLD at ultrasounds. We will compare GM composition using, for the first time, the most accurate method available, that is metagenomic shotgun. This method allows to analyze microbiota diversity, providing information both on intestinal microbial composition and on the metabolic processes linked to them. In addition, we will correlate, for the first time, GM composition to hepatic and, only in the obese patients, also to white adipose tissue gene expression patterns of interest and serum and fecal markers possibly related to impaired fat storage and inflammation. We aim to provide preliminary data to design future intervention studies with pre- or probiotics or bile acid derivatives to prevent/treat inflammation and fibrosis in NAFLD patients.
- Being tested
- liver and white adipose tissue biopsies
- Keywords
- Simple steatosis (SS), Non-alcoholic steatohepatitis (NASH), Gut microbiota (GM), Non alcoholic fatty liver disease (NAFLD)
- Medical subject headings
- Non-alcoholic Fatty Liver Disease, Obesity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
liver and white adipose tissue biopsiesProcedure or surgery
| Study group | Role | What they receive |
|---|---|---|
| Simple steatosis | We will run a cross-sectional observational study including two groups of human subjects: patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH). Grouping in patients SS or NASH will be performed based on the histological diagnosis of the type of NAFLD obtained at operation (sleeve gastrectomy or cholecystectomy). BMI will be considered as a confounding variable to be statistically analyzed. Main hypothesis: GM can lead to liver inflammation in patients with liver fat accumulation. Receives: Procedure: liver and white adipose tissue biopsies | |
| Non-alcoholic steato-hepatitis | We will run a cross-sectional observational study including two groups of human subjects: patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH). Grouping in patients SS or NASH will be performed based on the histological diagnosis of the type of NAFLD obtained at operation (sleeve gastrectomy or cholecystectomy). BMI will be considered as a confounding variable to be statistically analyzed. Main hypothesis: GM can lead to liver inflammation in patients with liver fat accumulation. Receives: Procedure: liver and white adipose tissue biopsies |
What is being measured
The primary outcome is the main question the study is designed to answer.
gut microbiota composition
In patients with simple steatosis SS vs those with NASH the gut microbiota composition is different even after BMI normalization
Measured: 12 months
Secondary outcomes (2)
In each patient group overall gut microbiota composition, and hepatic and (only in the obese patients submitted to bariatric surgery) adipose tissue mRNA expression of relevant lipid and inflammatory response pathways
In each patient group [simple steatosis (SS) and NASH], overall gut microbiota composition, and hepatic and (only in patients submitted to bariatric surgery) adipose tissue messenger ribonucleic acid (mRNA) expression of relevant lipid and inflammatory response pathways: Acetyl-coenzyme A-carboxylase (ACC1), Fatty acid Synthase (FAS), Sterol regulatory element-binding protein (SREBP1c), apolipoprotein B (ApoB), farnesoid X receptor (FXR), Carbohydrate-responsive element-binding protein (ChREBP), TGR5, Sterol regulatory element-binding protein (SREBP2a), liver X receptor (LXR), 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCR), low density lipoprotein receptor (LDLR) , Proprotein-convertase-subtilisin/kexin type 9 (PCSK9), tumor necrosis factor α (TNF-α), toll-like receptor 4 (TLR-4), NLRP3 (NOD-like receptor 3), c-Jun N-terminal kinase (JUN-K)
Measured: 12 months
In each patient group overall gut microbiota composition, and hepatic and (only in the obese patients submitted to bariatric surgery) adipose tissue mRNA expression of relevant lipid and inflammatory response pathways
In each patient group [simple steatosis (SS) and NASH], overall gut microbiota composition, and hepatic and (only in patients submitted to bariatric surgery) adipose tissue mRNA expression of relevant lipid and inflammatory response pathways: ACC1 (Acetyl-CoA carboxylase), FAS (Fatty acid Synthase), SREBP1c (Sterol regulatory element-binding protein), ApoB (apolipoprotein B), FXR (farnesoid X receptor), ChREBP (Carbohydrate-responsive element-binding protein), TGR5, SREBP2a (Sterol regulatory element-binding protein), LXR (liver X receptor), HMGCR (3-hydroxy-3-methylglutaryl coenzyme A reductase), LDLR (low density lipoprotein receptor) , PCSK9 (Proprotein Convertase Subtilisin/Kexin type 9), TNF-α (tumor necrosis factor α), TLR-4 toll-like receptor 4), NLRP3 (NOD-like receptor 3), JUN-K (c-Jun N-terminal kinase)
Measured: 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jun 2014 (estimated)
- Study startNov 2013
- Primary completionJun 2014
- Study completionOct 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (32)Papers the sponsor has linked to this study.
- Other trials for Simple Steatosis (SS)Studies of the same condition, open and under way.
- More trials run by University of Roma La SapienzaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Enrolment
- 44 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Roma La Sapienza
- Sponsor type
- University, hospital or other
- Collaborators
- Göteborg University
- Responsible party
- Principal investigator, STEFANO GINANNI CORRADINI, University of Roma La Sapienza
- Investigators
- Stefano Ginnani Corradini, MD, PhD, Study director, Department of Translational and Precision Medicine, "Sapienza", University of RomeFredrik Backhed, PhD, Study director, Wallenberg laboratoriet, Gotebörg, SwedenFrida Leonetti, MD, PhD, Principal investigator, University of Roma La SapienzaGianfranco Silecchia, MD, Principal investigator, University of Roma La SapienzaFrancesco Gossetti, MD, Principal investigator, University of Roma La SapienzaAdriano De Santis, MD, Principal investigator, University of Roma La SapienzaClaudio Di Cristofano, MD, Principal investigator, University of Roma La Sapienza
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02158351
- Sponsor's protocol ID
- 2943/14.11.2013
- Status last verified
- Nov 2020
- First submitted
- 4 Jun 2014
- Last updated
- 20 Nov 2020
- Results posted
- No
- Data monitoring committee
- No
Publications
Vernon G, Baranova A, Younossi ZM. Systematic review: the epidemiology and natural history of non-alcoholic fatty liver disease and non-alcoholic steatohepatitis in adults. Aliment Pharmacol Ther. 2011 Aug;34(3):274-85. doi: 10.1111/j.1365-2036.2011.04724.x. Epub 2011 May 30.
PubMed 21623852Yilmaz Y. NAFLD in the absence of metabolic syndrome: different epidemiology, pathogenetic mechanisms, risk factors for disease progression? Semin Liver Dis. 2012 Feb;32(1):14-21. doi: 10.1055/s-0032-1306422. Epub 2012 Mar 13.
PubMed 22418884Backhed F, Manchester JK, Semenkovich CF, Gordon JI. Mechanisms underlying the resistance to diet-induced obesity in germ-free mice. Proc Natl Acad Sci U S A. 2007 Jan 16;104(3):979-84. doi: 10.1073/pnas.0605374104. Epub 2007 Jan 8.
PubMed 17210919Karlsson FH, Tremaroli V, Nookaew I, Bergstrom G, Behre CJ, Fagerberg B, Nielsen J, Backhed F. Gut metagenome in European women with normal, impaired and diabetic glucose control. Nature. 2013 Jun 6;498(7452):99-103. doi: 10.1038/nature12198. Epub 2013 May 29.
PubMed 23719380Ley RE, Turnbaugh PJ, Klein S, Gordon JI. Microbial ecology: human gut microbes associated with obesity. Nature. 2006 Dec 21;444(7122):1022-3. doi: 10.1038/4441022a.
PubMed 17183309Musso G, Gambino R, Cassader M. Gut microbiota as a regulator of energy homeostasis and ectopic fat deposition: mechanisms and implications for metabolic disorders. Curr Opin Lipidol. 2010 Feb;21(1):76-83. doi: 10.1097/MOL.0b013e3283347ebb.
PubMed 19915460Spencer MD, Hamp TJ, Reid RW, Fischer LM, Zeisel SH, Fodor AA. Association between composition of the human gastrointestinal microbiome and development of fatty liver with choline deficiency. Gastroenterology. 2011 Mar;140(3):976-86. doi: 10.1053/j.gastro.2010.11.049. Epub 2010 Dec 1.
PubMed 21129376Frazier TH, DiBaise JK, McClain CJ. Gut microbiota, intestinal permeability, obesity-induced inflammation, and liver injury. JPEN J Parenter Enteral Nutr. 2011 Sep;35(5 Suppl):14S-20S. doi: 10.1177/0148607111413772. Epub 2011 Aug 1.
PubMed 21807932Chassaing B, Etienne-Mesmin L, Gewirtz AT. Microbiota-liver axis in hepatic disease. Hepatology. 2014 Jan;59(1):328-39. doi: 10.1002/hep.26494. Epub 2013 Nov 15.
PubMed 23703735Mouzaki 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.
PubMed 23401313Zhu L, Baker SS, Gill C, Liu W, Alkhouri R, Baker RD, Gill SR. Characterization of gut microbiomes in nonalcoholic steatohepatitis (NASH) patients: a connection between endogenous alcohol and NASH. Hepatology. 2013 Feb;57(2):601-9. doi: 10.1002/hep.26093. Epub 2013 Jan 8.
PubMed 23055155Wong VW, Tse CH, Lam TT, Wong GL, Chim AM, Chu WC, Yeung DK, Law PT, Kwan HS, Yu J, Sung JJ, Chan HL. Molecular characterization of the fecal microbiota in patients with nonalcoholic steatohepatitis--a longitudinal study. PLoS One. 2013 Apr 25;8(4):e62885. doi: 10.1371/journal.pone.0062885. Print 2013.
PubMed 23638162Karlsson FH, Fak F, Nookaew I, Tremaroli V, Fagerberg B, Petranovic D, Backhed F, Nielsen J. Symptomatic atherosclerosis is associated with an altered gut metagenome. Nat Commun. 2012;3:1245. doi: 10.1038/ncomms2266.
PubMed 23212374Glicksman C, Pournaras DJ, Wright M, Roberts R, Mahon D, Welbourn R, Sherwood R, Alaghband-Zadeh J, le Roux CW. Postprandial plasma bile acid responses in normal weight and obese subjects. Ann Clin Biochem. 2010 Sep;47(Pt 5):482-4. doi: 10.1258/acb.2010.010040. Epub 2010 Jul 1.
PubMed 20595403Vincent RP, Omar S, Ghozlan S, Taylor DR, Cross G, Sherwood RA, Fandriks L, Olbers T, Werling M, Alaghband-Zadeh J, le Roux CW. Higher circulating bile acid concentrations in obese patients with type 2 diabetes. Ann Clin Biochem. 2013 Jul;50(Pt 4):360-4. doi: 10.1177/0004563212473450. Epub 2013 Jun 14.
PubMed 23771134
Study at a glance
From the registry record, last updated by the sponsor on 20 Nov 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Role and Pathogenetic Mechanisms of Intestinal Microbiota in Non-alcoholic Fatty Liver Disease Severity in Obese and Non-obese Subjects
- ClinicalTrials.gov ID
- NCT02158351
- Acronym / sponsor ID
- 2943/14.11.2013
- Keywords
- Simple steatosis (SS), Non-alcoholic steatohepatitis (NASH), Gut microbiota (GM), Non alcoholic fatty liver disease (NAFLD)
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 44 participants (actual)
- Lead sponsor
- University of Roma La SapienzaUniversity, hospital or other
- Collaborators
- Göteborg University
- Study start
- Nov 2013 (actual)
- Primary completion
- Jun 2014 (actual)
- Study completion
- Oct 2017 (actual)
- First posted
- 6 Jun 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Several experimental data suggest that gut-derived endotoxin and GM composition can act as a "second hit" or insult to convert hepatic SS to NASH and cause both local hepatic and systemic inflammation.This study's aim is to analyze microbiota diversity, providing information both on intestinal microbial composition and on the metabolic processes linked to them. In addition, we will correlate, for the first time, GM composition to hepatic and white adipose tissue gene expression patterns of interest and serum and fecal markers possibly related to impaired fat storage and inflammation. We aim to provide preliminary data to design future intervention studies with pre- or probiotics or bile acid derivatives to prevent/treat inflammation and fibrosis in NAFLD patients.
Detailed description
Non-alcoholic fatty liver disease (NAFLD) includes benign hepatic simple steatosis (SS) and the more severe steatohepatitis (NASH), which is characterized by inflammation and fibrosis potentially leading to cirrhosis and hepatocellular carcinoma. Current research is focused on what are the risk factors and determinants of NASH. NAFLD is associated with the metabolic syndrome, and the prevalence has been described to be up to 98% in morbidly obese individuals undergoing bariatric surgery. NAFLD in non-obese subjects have a different clinical profile than in obese individuals, being associated with insulin resistance (IR), differential distribution of visceral adipose tissue, recent increase in body weight and/or presence of overweight, intake of high cholesterol diet and genetic background.
Gut microbiota (GM) regulates fat metabolism in mice. In humans its alterations have been linked to diabetes, obesity, IR, atherosclerosis and inflammation, SS and NAFLD.
Several experimental data suggest that gut-derived endotoxin and GM composition can act as a "second hit" or insult to convert hepatic SS to NASH and cause both local hepatic and systemic inflammation. With regard to human studies, Muozaki et al. have recently showed, by using a polymerase chain reaction (PCR) TaqMan system approach, that obese patients with NASH, have a lower percentage of fecal Bacteroidetes (Bacteroidetes to total bacteria counts) compared to both SS and healthy controls and a higher percentage of C. coccoides compared to those with SS . In addition, Zhu et al. showed in pediatric subjects, by using a 16S ribosomal RNA detection method, an unique pattern of enterotypes in patients with NASH, in obese individuals with no sign of liver damage and in lean healthy controls. Finally, Wai-Sun Wong et al. showed, also using a 16S ribosomal RNA detection method, that a small group of Chinese NASH patients demonstrated fecal dysbiosis but not significant changes in biodiversity compared to healthy subjects. Finally, inflammation in patients with symptomatic atherosclerosis has been shown to be associated with lower levels of butyrate producing gut bacteria such as Roseburia.
Among the possible factors involved in determining NAFLD severity, serum bile acid (BA) concentration and its post-prandial variations have been recently linked to the regulation of body weight, liver fat and inflammation and glucose and lipid metabolism. These BA regulatory functions are mediated by their interaction with the farnesoid X receptor (FXR)and the G Protein-Coupled BA Receptor 1 (GPBAR1 or TGR5) at both hepatic and subcutaneous adipose tissue levels. No human study has been directed to investigating the mechanisms through which GM composition influences inflammation and fibrosis in both obese and non-obese patients with NAFLD.
Liver biopsy is clinically advisable during bariatric surgery, due to the high prevalence of NAFLD and NASH in morbidly obese patients. It has been previously suggested that the high prevalence of histologically proven NAFLD in patients with gallstones may also justify routine liver biopsy during cholecystectomy, even in non-obese subjects, to establish the diagnosis, stage, and possible therapy. The latter suggestion has been very recently reinforced by the evidence that, in humans, cholecystectomy may represent an independent risk factor for NAFLD detected at ultrasounds and by the experimental demonstration that cholecystectomy increases hepatic triglycerides content.
In the present research project we will study patients with histologically proven SS or with NASH. Liver biopsy will be performed during bariatric surgery (sleeve gastrectomy) or cholecystectomy in patients with preoperative evidence of NAFLD at ultrasounds. We will compare GM composition using, for the first time, the most accurate method available, that is metagenomic shotgun. This method allows to analyze microbiota diversity, providing information both on intestinal microbial composition and on the metabolic processes linked to them. In addition, we will correlate, for the first time, GM composition to hepatic and, only in the obese patients, also to white adipose tissue gene expression patterns of interest and serum and fecal markers possibly related to impaired fat storage and inflammation. We aim to provide preliminary data to design future intervention studies with pre- or probiotics or bile acid derivatives to prevent/treat inflammation and fibrosis in NAFLD patients.
Study design
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Simple steatosis | – | Procedure: liver and white adipose tissue biopsiesWe will run a cross-sectional observational study including two groups of human subjects: patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH). Grouping in patients SS or NASH will be performed based on the histological diagnosis of the type of NAFLD obtained at operation (sleeve gastrectomy or cholecystectomy). BMI will be considered as a confounding variable to be statistically analyzed. Main hypothesis: GM can lead to liver inflammation in patients with liver fat accumulation. |
| Non-alcoholic steato-hepatitis | – | Procedure: liver and white adipose tissue biopsiesWe will run a cross-sectional observational study including two groups of human subjects: patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH). Grouping in patients SS or NASH will be performed based on the histological diagnosis of the type of NAFLD obtained at operation (sleeve gastrectomy or cholecystectomy). BMI will be considered as a confounding variable to be statistically analyzed. Main hypothesis: GM can lead to liver inflammation in patients with liver fat accumulation. |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- two groups of patients with morbid obesity undergoing sleeve gastrectomy will be enrolled. Grouping in patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH) will be performed based on the histological diagnosis of the type of NAFLD obtained at operation. Two groups of non-obese patients undergoing cholecystectomy for gallstone disease will be enrolled. Grouping in patients with simple steatosis (SS) or non-alcoholic steatohepatitis (NASH) will be performed based on the histological diagnosis of the type of NAFLD obtained at operation.
Key inclusion criteria (4 listed)
- Male or female, equal or over 18 years old
- Eligible for Sleeve Gastrectomy for obesity with BMI 35-50 kg/m2
- Eligible for Cholecystectomy for symptomatic gallstones and bright liver at ultrasounds
- Alcohol consumption is less than 20 g/d
Key exclusion criteria (9 listed)
- Having liver disease of other etiology
- Having advanced liver disease
- Having abnormal coagulation or other reason contraindicating a Liver Biopsy
- On regular intake of medications known to cause or exacerbate steatohepatitis or antibiotic, pre- or probiotics in the previous 3 months
- Use of vitamin E or fish oil supplements in the previous 2 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| liver and white adipose tissue biopsies | Procedure or surgery | Non-alcoholic steato-hepatitis, Simple steatosis |
Primary outcome
gut microbiota composition
Time frame: 12 months
In patients with simple steatosis SS vs those with NASH the gut microbiota composition is different even after BMI normalization
2 secondary outcomes
In each patient group overall gut microbiota composition, and hepatic and (only in the obese patients submitted to bariatric surgery) adipose tissue mRNA expression of relevant lipid and inflammatory response pathways
Time frame: 12 months
In each patient group overall gut microbiota composition, and hepatic and (only in the obese patients submitted to bariatric surgery) adipose tissue mRNA expression of relevant lipid and inflammatory response pathways
Time frame: 12 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Nov 2020.
- Background: PubMed 21623852Vernon G, Baranova A, Younossi ZM. Systematic review: the epidemiology and natural history of non-alcoholic fatty liver disease and non-alcoholic steatohepatitis in adults. Aliment Pharmacol Ther. 2011 Aug;34(3):274-85. doi: 10.1111/j.1365-2036.2011.04724.x. Epub 2011 May 30.
- Background: PubMed 22418884Yilmaz Y. NAFLD in the absence of metabolic syndrome: different epidemiology, pathogenetic mechanisms, risk factors for disease progression? Semin Liver Dis. 2012 Feb;32(1):14-21. doi: 10.1055/s-0032-1306422. Epub 2012 Mar 13.
- Background: PubMed 17210919Backhed F, Manchester JK, Semenkovich CF, Gordon JI. Mechanisms underlying the resistance to diet-induced obesity in germ-free mice. Proc Natl Acad Sci U S A. 2007 Jan 16;104(3):979-84. doi: 10.1073/pnas.0605374104. Epub 2007 Jan 8.
- Background: PubMed 23719380Karlsson FH, Tremaroli V, Nookaew I, Bergstrom G, Behre CJ, Fagerberg B, Nielsen J, Backhed F. Gut metagenome in European women with normal, impaired and diabetic glucose control. Nature. 2013 Jun 6;498(7452):99-103. doi: 10.1038/nature12198. Epub 2013 May 29.
- Background: PubMed 17183309Ley RE, Turnbaugh PJ, Klein S, Gordon JI. Microbial ecology: human gut microbes associated with obesity. Nature. 2006 Dec 21;444(7122):1022-3. doi: 10.1038/4441022a.
- Background: PubMed 19915460Musso G, Gambino R, Cassader M. Gut microbiota as a regulator of energy homeostasis and ectopic fat deposition: mechanisms and implications for metabolic disorders. Curr Opin Lipidol. 2010 Feb;21(1):76-83. doi: 10.1097/MOL.0b013e3283347ebb.
- Background: PubMed 21129376Spencer MD, Hamp TJ, Reid RW, Fischer LM, Zeisel SH, Fodor AA. Association between composition of the human gastrointestinal microbiome and development of fatty liver with choline deficiency. Gastroenterology. 2011 Mar;140(3):976-86. doi: 10.1053/j.gastro.2010.11.049. Epub 2010 Dec 1.
- Background: PubMed 21807932Frazier TH, DiBaise JK, McClain CJ. Gut microbiota, intestinal permeability, obesity-induced inflammation, and liver injury. JPEN J Parenter Enteral Nutr. 2011 Sep;35(5 Suppl):14S-20S. doi: 10.1177/0148607111413772. Epub 2011 Aug 1.
- Background: PubMed 23703735Chassaing B, Etienne-Mesmin L, Gewirtz AT. Microbiota-liver axis in hepatic disease. Hepatology. 2014 Jan;59(1):328-39. doi: 10.1002/hep.26494. Epub 2013 Nov 15.
- Background: PubMed 23401313Mouzaki 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.
- Background: PubMed 23055155Zhu L, Baker SS, Gill C, Liu W, Alkhouri R, Baker RD, Gill SR. Characterization of gut microbiomes in nonalcoholic steatohepatitis (NASH) patients: a connection between endogenous alcohol and NASH. Hepatology. 2013 Feb;57(2):601-9. doi: 10.1002/hep.26093. Epub 2013 Jan 8.
- Background: PubMed 23638162Wong VW, Tse CH, Lam TT, Wong GL, Chim AM, Chu WC, Yeung DK, Law PT, Kwan HS, Yu J, Sung JJ, Chan HL. Molecular characterization of the fecal microbiota in patients with nonalcoholic steatohepatitis--a longitudinal study. PLoS One. 2013 Apr 25;8(4):e62885. doi: 10.1371/journal.pone.0062885. Print 2013.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Stefano Ginnani Corradini, MD, PhD study director
Department of Translational and Precision Medicine, "Sapienza", University of Rome
Fredrik Backhed, PhD study director
Wallenberg laboratoriet, Gotebörg, Sweden
Frida Leonetti, MD, PhD principal investigator
University of Roma La Sapienza
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Simple Steatosis (SS) and Non-alcoholic Steatohepatitis (NASH), run by University of Roma La Sapienza at 1 site in Italy.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 20 Nov 2020. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Italy. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
gut microbiota composition (time frame: 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02158351, which also lists 32 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Nov 2020.