Review source snapshots checked September 15, 2026 · Integrity checked September 15, 2026.
Two selected reports examine liver-fat changes during an extension study and histologic outcomes in a phase 2 trial. The extension continues an earlier participant cohort; it is not a separate randomized trial.↗↗
What the reviewed sources report
The extension reported liver-fat reductions among selected continuing participants. IMPACT met its MASH-resolution endpoint at 24 weeks but did not demonstrate its fibrosis-improvement endpoint. Longer-term clinical outcomes remain unestablished.↗↗
What remains unresolved?
How do the original trial and selected extension differ in participant retention and outcome analysis?↗↗
What do full reports establish about missing outcomes, sustained histologic changes and longer-term clinical events?↗↗
Reviews summarize selected studies; their scope and limitations are shown above.
Research coverage and study families
Search and screening record checked 2026-09-15. Counts describe records, not independent trials. Full-text appraisal is separate from an abstract review.
Scoped identity/name search for initial human evidence synthesis; other aliases and preclinical, extension and combination reports require separate eligibility decisions.
16 retrieved · 3 included · 13 excluded · 0 awaiting a decision · 0 full-text appraisals
Search terms, record decisions and remaining work
"pemvidutide"[Title/Abstract] OR "alt 801"[Title/Abstract] OR "alt 801"[Title/Abstract]
Registry comparison, additional aliases and references, and regulator reconciliation require separate checks.
Original phase 2 MASLD report PMID39002641 has a publisher correction whose full content remains unavailable; the corrected report is not summarized here.
The 24-week report identifies an extension of the earlier 12-week study; its NCT05292911 extension is grouped with parent NCT05006885. The three included reports still require full-text appraisal and correction reconciliation.
The modeling supplement cites a 2022 first-in-human presentation; that original presentation and its study-family relationship remain unappraised. Excluding this secondary analysis does not discard the citation lead.
Showing 16 of 16 record decisions, with included studies and unresolved records first. The versioned data inventory retains every record and study-family link.
PubMed 41237796 — include: Primary human trial or extension report; the selected abstract establishes the trial identity, while full-text appraisal and registry history remain separate. Study families: NCT05989711.
PubMed 41113119 — include: Primary human trial or extension report; the selected abstract establishes the trial identity, while full-text appraisal and registry history remain separate. The 24-week report follows completers of the original 12-week MASLD study; NCT05292911 is its extension registry. The parent and extension are retained as one study family. Study families: NCT05006885.
PubMed 39002641 — include: Primary human trial or extension report; the selected abstract establishes the trial identity, while full-text appraisal and registry history remain separate. Study families: NCT05006885.
PubMed 42529769 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 41879841 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 41696398 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 41661442 — exclude: Cross-species pharmacokinetic modeling reuses pemvidutide human data from a 2022 first-in-human presentation (supplement Table S1, page 5; reference 11, page 12). It is not an additional primary human-administration report. The presentation remains a citation lead, not a newly appraised trial.Full-text eligibility check · PMC13038672
Read the source full text ↗ · sections Methods: The Dataset of Peptide Drug Pharmacokinetics, Data availability.
PubMed 41352959 — exclude: The author disclosure in the PubMed record explicitly identifies this article as a Comment. It discusses the phase 2b trial rather than reporting an additional primary human-administration study.
Eligibility source ↗ · Conflict-of-interest statement: author identifies this as a Comment · read 2026-09-15.
PubMed 41362110 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 40734920 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 40081498 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 40063921 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 39676791 — exclude: Secondary review, commentary or research overview; not a primary human-administration report for this molecule.
PubMed 35461369 — exclude: Preclinical, genetic or mechanistic study; no primary administration of this molecule to people is reported in the inspected abstract.
PubMed 21994418 — exclude: ALT-801 here refers to an oncology IL-2/T-cell-receptor fusion program or a multi-drug trial roundup, not the pemvidutide GLP-1/glucagon agonist.
PubMed 20383346 — exclude: Multi-drug clinical-trial roundup; does not supply a primary report of pemvidutide administration.
FDA search
Active-ingredient name query in openFDA Drugs@FDA. Returned application identities include salt forms and combination products; exact indications, approval conditions, supplements and marketing status require document-level review.
0 retrieved · 0 included · 0 excluded · 0 awaiting a decision · 0 full-text appraisals
Zero results describe this query response only, not absence of FDA approval or worldwide nonapproval.
This endpoint does not inventory every label, advisory proceeding, safety communication or regulatory document. Application inclusion does not establish current marketing or approval of every use.
Showing 0 of 0 record decisions, with included studies and unresolved records first. The versioned data inventory retains every record and study-family link.
EMA search
Local matching in the pinned EMA medicines feed; document matches also use identified EMA product numbers. This is not every national European record.
0 retrieved · 0 included · 0 excluded · 0 awaiting a decision · 0 full-text appraisals
Document appraisal and national European sources remain open.
Zero matches apply only to these feed fields and terms; orphan designation is not approval.
Showing 0 of 0 record decisions, with included studies and unresolved records first. The versioned data inventory retains every record and study-family link.
EMA search
Local matching in the pinned EMA documents feed; document matches also use identified EMA product numbers. This is not every national European record.
0 retrieved · 0 included · 0 excluded · 0 awaiting a decision · 0 full-text appraisals
Document appraisal and national European sources remain open.
Zero matches apply only to these feed fields and terms; orphan designation is not approval.
Showing 0 of 0 record decisions, with included studies and unresolved records first. The versioned data inventory retains every record and study-family link.
EMA search
Local matching in the pinned EMA orphans feed; document matches also use identified EMA product numbers. This is not every national European record.
0 retrieved · 0 included · 0 excluded · 0 awaiting a decision · 0 full-text appraisals
Document appraisal and national European sources remain open.
Zero matches apply only to these feed fields and terms; orphan designation is not approval.
Showing 0 of 0 record decisions, with included studies and unresolved records first. The versioned data inventory retains every record and study-family link.
ClinicalTrials.gov search
ClinicalTrials.gov name/alias discovery, including cited product names. Matches may concern combinations, background references or different formulations; identity and outcomes need screening.
16 retrieved · 0 included · 0 excluded · 16 awaiting a decision · 0 full-text appraisals
Registration is not evidence that a study succeeded, that results were published, or that a use is approved.
Other registries, unregistered studies and additional aliases remain outside this query.
Showing 16 of 16 record decisions, with included studies and unresolved records first. The versioned data inventory retains every record and study-family link.
ClinicalTrials.gov NCT07009860 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT01670994 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT01326871 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT05295875 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT06987513 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT00496860 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT05292911 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT01029873 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT01478074 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT04972396 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT04561245 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT05134662 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT01625260 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT07795164 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT05006885 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
ClinicalTrials.gov NCT05989711 — not screened: Registry name-query match awaiting intervention identity, study-family linkage and results appraisal.
Read the full Human Evidence Review
Supervised synthesis
What do selected human studies report about Pemvidutide?
Two selected reports examine liver-fat changes during an extension study and histologic outcomes in a phase 2 trial. The extension continues an earlier participant cohort; it is not a separate randomized trial.12
Bottom line from this bounded source set
The extension reported liver-fat reductions among selected continuing participants. IMPACT met its MASH-resolution endpoint at 24 weeks but did not demonstrate its fibrosis-improvement endpoint. Longer-term clinical outcomes remain unestablished.12
Reviewed study record
MASLD extension
Design
Double-blind extension of a preceding randomized trial; NCT05292911.1
Population
64 participants from the earlier 94-participant study continued; this is not a new independently randomized cohort.1
Outcomes reported
At 24 weeks, reported relative liver-fat reductions were 56.3%, 75.2% and 76.4% in active groups versus 14.0% with placebo.1
Limitations
Selective extension participation can bias interpretation. MRI liver fat is not the same as histologic fibrosis improvement or patient-important liver outcomes.1
Reviewed study record
IMPACT: biopsy-confirmed MASH
Design
Randomized, double-blind, placebo-controlled phase 2 trial; NCT05989711; two coprimary histology endpoints at week 24.2
Population
212 participants with MASH and stage F2 or F3 fibrosis participated.2
Outcomes reported
The study met the endpoint of MASH resolution without worsening fibrosis, but did not meet the fibrosis-improvement endpoint without worsening MASH. Adverse events were reported in 78% and 81% of active groups versus 67% with placebo.2
Limitations
The abstract does not fully describe handling of missing biopsy outcomes. Longer follow-up was ongoing; a favorable disease-activity endpoint does not establish fibrosis benefit or fewer clinical events.2
No registered Crossref update in the reviewed snapshotChecked September 15, 2026 for DOI 10.1016/j.jhepr.2025.101483. This bounded result is not proof that the publication has never been corrected or retracted. Open the pinned Crossref work endpoint ↗
No registered Crossref update in the reviewed snapshotChecked September 15, 2026 for DOI 10.1016/s0140-6736(25)02114-2. This bounded result is not proof that the publication has never been corrected or retracted. Open the pinned Crossref work endpoint ↗
Explore status sources, recent additions, and coverage gaps
Living status brief
What is the current status of Pemvidutide?
Investigational. ClinicalTrials.gov lists Altimmune's IMPACT study as completed, last updated May 18, 2026.↗
The cited status sources were checked through July 22, 2026. This answer changes only through the profile’s visible version and correction history.
PeptideScanner currently has no selected PubMed literature metadata records, regulatory records, and safety records connected to this profile. That is a collection gap, not evidence that no such records exist.
PeptideScanner does not infer an answer where the cited records do not provide one. Open the source-linked records below to inspect their scope and limits.
This map describes PeptideScanner’s selected, source-linked collection. It is not an evidence grade and does not establish research quality, safety, effectiveness, or medical relevance.
A phase value is unavailable here for 2 selected records; this is not counted as “no phase.”
A status value is unavailable here for 2 selected records; this is not counted as a trial status.
PubMed bibliography
Publication composition
0 of 0 selected PubMed records include attributed title, venue, publication date, and publication-type fields.
Regulatory and publication surfaces
What is structurally connected?
Drugs@FDA applications
0
FDA Federal Register documents
0
DailyMed SPL versions
0
Canonical profile
Published
Profile structured data
Published
Linked dated records
6
Application counts reflect exact reviewed ingredient connections; Federal Register counts reflect exact reviewed peptide-name matches; DailyMed counts reflect listed SPL versions with retained ZIP receipts. “Published” describes this page’s indexing surface, not the state of scientific evidence.
PeptideScanner retained ClinicalTrials.gov record NCT04561245 at 2026-07-30T18:26:04.261Z. Its registry update date was 2025-06-24, and PeptideScanner's reviewed identity mapping was pemvidutide.
PeptideScanner retained ClinicalTrials.gov record NCT07795164 at 2026-09-09T19:17:17.076Z. Its registry update date was 2026-08-31, and PeptideScanner's reviewed identity mapping was pemvidutide.
PeptideScanner retained ClinicalTrials.gov record NCT06987513 at 2026-08-10T18:10:03.928Z. Its registry update date was 2026-07-31, and PeptideScanner's reviewed identity mapping was pemvidutide.
Counts and links describe PeptideScanner’s selected records. They are not rankings and do not establish research quality, safety, effectiveness, or medical relevance.
These links are based only on overlapping years and evidence lanes in PeptideScanner’s selected records. They do not imply that the peptides are medically or scientifically similar.
These dates come from selected source records and PubMed metadata. They are not a complete or continuous timeline of research, safety, approval, or effectiveness.
Evidence summary
What the cited records say
ClinicalTrials.gov lists Altimmune's IMPACT study as completed, last updated May 18, 2026.↗
This is a source summary, not a medical recommendation. Status may differ by jurisdiction and product.
PeptideScanner retained ClinicalTrials.gov record NCT07795164 at 2026-09-09T19:17:17.076Z. Its registry update date was 2026-08-31, and PeptideScanner's reviewed identity mapping was pemvidutide.↗
PeptideScanner retained ClinicalTrials.gov record NCT06987513 at 2026-08-10T18:10:03.928Z. Its registry update date was 2026-07-31, and PeptideScanner's reviewed identity mapping was pemvidutide.↗
PeptideScanner retained ClinicalTrials.gov record NCT05989711 at 2026-07-30T16:19:36.923Z. Its registry update date was 2026-05-18, and PeptideScanner's reviewed identity mapping was pemvidutide.↗
PeptideScanner retained ClinicalTrials.gov record NCT07009860 at 2026-07-30T16:22:22.335Z. Its registry update date was 2026-03-20, and PeptideScanner's reviewed identity mapping was pemvidutide.↗
PeptideScanner retained ClinicalTrials.gov record NCT04561245 at 2026-07-30T18:26:04.261Z. Its registry update date was 2025-06-24, and PeptideScanner's reviewed identity mapping was pemvidutide.↗