An observational study in Metabolic Associated Fatty Liver Disease, Metabolic Associated Steatotic Liver Disease and Cirrhosis, Liver, sponsored by Foundation for the National Institutes of Health. Recruiting at 4 sites in United States. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-10-26.
Sponsored by Foundation for the National Institutes of Health · Observational
The Non-Invasive Biomarkers for Metabolic Liver Disease (NIMBLE) study is a comprehensive, multi-year collaborative effort to standardize, validate and advance the regulatory qualification of blood- and imaging-based biomarkers to diagnose and stage Metabolic dysfunction-associated steatohepatitis (MASH), previously known as nonalcoholic steatohepatitis (NASH). MASH is characterized by liver inflammation accompanied by simultaneous fat accumulation in the liver.
Metabolic dysfunction-associated steatotic liver disease (MASLD), previously known as nonalcoholic fatty liver disease (NAFLD), is a common liver problem which affects 30% of the United States population. Liver biopsy-based histopathology is accepted as the most accurate technique to detect patients at risk of developing serious liver conditions secondary to non-alcoholic steatohepatitis (MASH). However, the liver biopsy is an invasive test with risk for complications and even risk of mortality. Alternative non-invasive blood-based and imaging biomarkers are needed to replace liver biopsy for diagnosis and staging of MASH with fibrosis with the ultimate goal to guide timely decisions for clinical care including pharmacologic intervention for patients with MASH.
The Non-Invasive Biomarkers for Metabolic Liver Disease (NIMBLE) project was commissioned by the FNIH to qualify non-invasive tests (NITs) for MASLD. It represents a collaborative effort involving the FNIH, Food and Drug Administration (FDA), academics and multiple industry partners to qualify biomarkers for diagnosis and staging of MASH with fibrosis. The NIMBLE project plan was designed to occur across two stages (Stage 1 and Stage 2) and with the ultimate goal to generate data on blood-based, Vibration Controlled Transient Elastography- (VCTE) based and imaging-based biomarkers to support seeking regulatory approval of one or more biomarker(s) or biomarker panel(s) for diagnosis and staging of MASH.
Data generated within NIMBLE Stage 1 were able to successfully identify a set of candidate blood-based and imaging biomarkers that met prespecified criteria for further evaluation in Stage 2. The current study aims to deliver on that goal for NIMBLE Stage 2, namely, to confirm and extend the findings from NIMBLE Stage 1 in the setting of a prospective non-interventional trial in a population at risk for MASH with fibrosis. To that end, NIMBLE Study 2.0 is primarily designed to evaluate the performance characteristics of prespecified blood-based, VCTE-based and imaging-based biomarker(s) and biomarker panel(s) when calibrated against liver biopsy-based histology as well as currently available tools for diagnosis and staging of MASH in those at risk.
1,298 studies on the registry are indexed under Liver Cirrhosis; 338 are open to participants now.
This study's planned enrollment of 400 is above the median of 171 across 526 observational studies indexed under Liver Cirrhosis.
Browse Liver Cirrhosis studies →Foundation for the National Institutes of Health is the lead sponsor of 10 studies on the registry; 2 are open to participants now.
Counted across the registry records on this site, refreshed daily.
This study will enroll participants with suspected or confirmed diagnosis of MASLD.
Sex: Male and female participants Age: ≥ 18 and \< 75 years Population sample: Patients with a high probability of MASLD based on eligibility criteria (details under inclusion/exclusion criteria in Section 5.1) General health status: Patients with suspected or confirmed diagnosis of MASLD and no contraindications precluding participation in any study procedures.
Geographic location: United States, multi-site
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
A. Physician-diagnosed T2DM for at least 90 days with > 6.5 and antidiabetic therapy, if any, stable for at least 90 days prior to screening or B. At least any one of the following six metabolic syndrome criteria [6]
1. (BMI) of > 25 kg/m2 2. waist circumference: i. > 102 cm for men ii. > 88.9 cm for women 3. fasting triglyceride concentration > 150 mg/dL i. or ongoing treatment with triglyceride lowering medication 4. HDL-cholesterol concentration: i. \< 40 mg/dL for men ii. \< 50 mg/dL for women iii. or ongoing treatment with cholesterol lowering medication. 5. fasting glucose concentration > 100 mg/dL 6. either semi-recumbent or supine blood pressure systolic > 130 mmHg and/ or diastolic > 85 mmHg i. or ongoing treatment with antihypertensive medication. 5. FIB-4 > 1.3 (age \< 65 years) and > 2.0 (age > 65 years) 6. Agreement to adhere to Lifestyle Considerations (see section 5.3) throughout study duration
Exclusion Criteria:
Ongoing or recent (within the last two years prior to screening) consumption of significantly greater than moderate amounts of alcohol.
Women
>21 standard drinks per week in men
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HbA1c
A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Detection of At-Risk MASH
Evaluate the diagnostic performance of individual and combined biomarkers (e.g., NIS2+, ADAPT \[PRO-C3-based score\], MRI-AST (MAST) \[MRE + PDFF + AST\], FAST and Metabolomics-Advanced Steatohepatitis Fibrosis (MASEF) \[included in the OWLiver Test\]) for identifying at-risk MASH (MASH + MAS ≥4 + fibrosis stage ≥2).
Time frame: within 120 days of study enrollment.
Fibrosis Staging
Assess blood-based, imaging, and composite biomarkers (e.g., Enhanced Liver Fibrosis (ELF) Test, Liver Stiffness Measure (LSM) by VCTE, MRE, Agile 3+, Agile 4) for detecting clinically significant fibrosis (≥2), advanced fibrosis (≥3), and fibrosis stage 4 (cirrhosis, histologically defined).
Time frame: within 120 days of study enrollment.
Liver Fat Content Monitoring
Evaluate imaging-based biomarkers (e.g., MRI-PDFF, Hepatorenal Index, Controlled Attenuation Parameter (CAP)) for hepatic steatosis monitoring.
Time frame: within 120 days of study enrollment.
Diagnostic Enrichment
Identify biomarkers that enhance participant selection for clinical trials, focusing on populations with at-risk MASH, specific fibrosis stages, or steatosis.
Time frame: within 120 days of study enrollment.
Exploratory Biomarkers
Investigate exploratory biomarkers (e.g., AI-based histological scoring, sequential testing strategies) for novel diagnostic workflows.
Time frame: within 120 days of study enrollment.
Comparison to Fibrosis (FIB)-4 or other fibrosis-related standards
To compare the performance characteristics of one or more 1) blood-based biomarkers, 2) imaging-based biomarkers, 3) VCTE-based biomarkers and 4) multiparametric biomarkers to to FIB-4 or other fibrosis-related standards specific to the context of use (COU) for fibrosis in a population at risk for MASH with fibrosis.
Time frame: within 120 days of study enrollment.
Comparison to ALT or other activity-related standards.
To compare the performance characteristics of one or more 1) blood-based biomarkers, 2) imaging-based biomarkers, 3) VCTE-based biomarkers and 4) multiparametric biomarkers to ALT or other activity-related standards specific to the context of use (COU) of at-risk MASH in a population at risk for MASH with fibrosis.
Time frame: within 120 days of study enrollment.
Comparison to Histology.
To compare the performance characteristics of one or more 1) blood-based biomarkers, 2) imaging-based biomarkers, 3) VCTE-based biomarkers and 4) multiparametric biomarkers to histology standards to the context of use (COU) for steatosis in a population at risk for MASH with fibrosis.
Time frame: within 120 days of study enrollment.
AI-driven histology endpoints
a. Correlation of AI-based digital pathology results with traditional histological scoring systems (MAFLD Activity Score (MAS), fibrosis stages).
Time frame: within 120 days of study enrollment.
Plan to share: Yes — NIMBLE has an ancillary studies protocol which governs all requests for use of data, beyond the primary publication by project team members who have contributed services to the project. For example, this request covers clinical data that are associated with the biospecimens each company obtained and analyzed, as well as biomarker values, imaging results, and biopsy results generated by project team members.
Supporting information: Study protocol, Statistical analysis plan, Informed consent form
Time frame: Data will be made publicly available upon closeout (estimated Q4 2026). Until that point, all data are governed by the ancillary studies policy.
Access criteria: Companies only get access to data they generated and associated clinical values, unless requested via ancillary studies protocol. Project team members who funded the project get access to all IPD.
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Foundation for the National Institutes of Health