OncoSignal
Live from Open Targets Platform, fetched 2026-11-12 01:04 UTC. Every row links to its source record.

FNTA farnesyltransferase, CAAX box, subunit alpha

ENSG00000168522 · protein coding · Open Targets profile

Essential subunit of both the farnesyltransferase and the geranylgeranyltransferase complex. Contributes to the transfer of a farnesyl or geranylgeranyl moiety from farnesyl or geranylgeranyl diphosphate to a cysteine at the fourth position from the C-terminus of several proteins having the C-terminal sequence Cys-aliphatic- aliphatic-X. May positively regulate neuromuscular junction development downstream of MUSK via its function in RAC1 prenylation and activation. {ECO:0000269|PubMed:12036349, ECO:0000269|PubMed:12825937, ECO:0000269|PubMed:16893176, ECO:0000269|PubMed:19246009, ECO:0000269|PubMed:8419339, ECO:0000269|PubMed:8494894}.

1 of the 2 drugs recorded against FNTA is approved, and 1 more reached Phase 3

Each band is a group of drugs. It runs from the kind of drug on the left to the furthest stage that drug has reached in any disease on the right. Thicker bands mean more drugs.

1 small molecule drug at Approved: LONAFARNIB1 small molecule drug at Phase 3: TIPIFARNIBSmall molecule 2Approved 1Phase 3 1

Approved bands are highlighted. Withdrawn means the drug was pulled from the market or from development. A combined phase counts as the later one (Phase 1/2 is shown as Phase 2). Hover a band for the drug names. Source: Open Targets Platform, fetched live.

FNTA: inherited and tumour-mutation evidence across 15 cancers

Each row is a cancer, strongest overall evidence first. The two dots show how strong the inherited (germline) and tumour-mutation (somatic) evidence is; the line between them is the gap.

Inherited (germline) variantsMutations in tumours (somatic)
00.250.50.751myelodysplastic syndromemyelodysplastic syndromenon-small cell lung carcinomanon-small cell lung carcinomaacute myeloid leukemiaacute myeloid leukemiamalignant pancreatic neoplasmmalignant pancreatic neoplasmchronic myelomonocytic leukemiachronic myelomonocytic leukemiapancreatic neoplasmpancreatic neoplasmacute myeloid leukemia by FAB classific…acute myeloid leukemia by FAB classificationbreast cancerbreast cancerglioblastomaglioblastomahead and neck squamous cell carcinomahead and neck squamous cell carcinomachronic myeloid leukemiachronic myeloid leukemiaplasma cell myelomaplasma cell myelomamature T-cell and NK-cell non-Hodgkin l…mature T-cell and NK-cell non-Hodgkin lymphomapancreatic adenocarcinomapancreatic adenocarcinomatransitional cell carcinomatransitional cell carcinoma

Scores run from 0 (no evidence) to 1 (strongest). A missing dot at 0 means Open Targets holds no evidence of that kind. Source: Open Targets Platform, fetched live.

Tractability

Small molecule
Approved Drug, Structure with Ligand, High-Quality Ligand, Med-Quality Pocket, Druggable Family
Antibody
GO CC med conf
PROTAC
Database Ubiquitination, Half-life Data, Small Molecule Binder

gnomAD loss of function constraint: o/e 0.4889200031757355 (upper bound 0.674239993095398). Low values mean loss of function is poorly tolerated, a safety flag for inhibition.

Who runs trials of these drugs

Principal investigators and study chairs on 20 registry trials, updated in the last three years, of the most advanced drugs against FNTA (lonafarnib, tipifarnib), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.

8 of 19 trials of drugs against FNTA have sites only in United States

Registry trials of lonafarnib, tipifarnib updated in the last three years, counted by the country group of their listed sites. A trial with sites in several groups counts in each; 12 of 19 have all sites in one country.

Sites only in this groupSites here and elsewhere
United StatesUnited States: 8 trials with sites only hereUnited States: 6 trials with sites here and elsewhere14EuropeEurope: 2 trials with sites only hereEurope: 3 trials with sites here and elsewhere5OtherOther: 3 trials with sites only hereOther: 6 trials with sites here and elsewhere9

Site counts are not patients per country, and trials registered only outside ClinicalTrials.gov are not covered. Where sites are is a fact about the record, not a judgement of its quality. Europe is the EU and EEA, the UK and Switzerland. 1 trials list no sites and are left out. Source: ClinicalTrials.gov, fetched live.

22 trials of drugs against FNTA were stopped early; 10 give no reason

Terminated, withdrawn and suspended interventional trials of lonafarnib, tipifarnib, newest update first, live from ClinicalTrials.gov. Each reason is quoted exactly as the registry gives it; we do not sort reasons into safety, efficacy or business. Dates are the last registry update. Showing the 22 most recent of 22.

  • terminated · 2025-03-05 · Spanish Lung Cancer Group · Tipifarnib
    “The recruitment was closed prematurely to due to slow recruitment.”
  • terminated · 2024-07-31 · Kura Oncology, Inc. · Tipifarnib
    “Lack of efficacy”
  • withdrawn · 2024-05-23 · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) · matched by the registry's drug synonyms
    “Study closure based on decision of the PI”
  • terminated · 2023-09-21 · Kura Oncology, Inc. · Tipifarnib
    “Study terminated due to recruitment challenges”
  • withdrawn · 2023-03-06 · Kura Oncology, Inc. · Tipifarnib
    “This study was withdrawn due to a strategic business decision; no patients were enrolled.”
  • withdrawn · 2021-02-16 · Eiger BioPharmaceuticals · Lonafarnib
    “This study was initially planned to enroll patients in Mongolia. However, due to challenges in setting it up in Mongolia, this study was later determined not to be initiated.”
  • withdrawn · 2020-07-31 · Jonsson Comprehensive Cancer Center · lonafarnib
    No reason given
  • terminated · 2018-11-15 · M.D. Anderson Cancer Center · matched by the registry's drug synonyms
    “Slow accrual.”
  • withdrawn · 2018-11-14 · M.D. Anderson Cancer Center · matched by the registry's drug synonyms
    “No enrollment.”
  • terminated · 2018-08-23 · Lymphoma Study Association · ZARNESTRA (Tipifarnib)
    “Inefficiency of treatment”
  • terminated · 2017-04-05 · National Cancer Institute (NCI) · tipifarnib
    No reason given
  • terminated · 2016-02-18 · George Sledge · Lonafarnib
    “funding terminated”
  • terminated · 2015-08-27 · Merck Sharp & Dohme LLC · Lonafarnib (SARASAR)
    No reason given
  • terminated · 2015-05-01 · Merck Sharp & Dohme LLC · Lonafarnib
    No reason given
  • terminated · 2015-04-21 · Merck Sharp & Dohme LLC · matched by the registry's drug synonyms
    No reason given
  • terminated · 2015-02-05 · Merck Sharp & Dohme LLC · Docetaxel plus lonafarnib
    No reason given
  • terminated · 2013-11-25 · H. Lee Moffitt Cancer Center and Research Institute · matched by the registry's drug synonyms
    “Initial Principal Investigator left Moffitt”
  • terminated · 2013-10-08 · National Cancer Institute (NCI) · tipifarnib
    No reason given
  • terminated · 2013-05-03 · Ohio State University Comprehensive Cancer Center · tipifarnib
    “Withdrawn due to "toxicity" problems”
  • terminated · 2012-12-18 · Emory University · Lonafarnib
    No reason given
  • withdrawn · 2012-06-29 · The University of Texas Health Science Center at San Antonio · tipifarnib
    No reason given
  • terminated · 2006-11-14 · Institut Claudius Regaud · matched by the registry's drug synonyms
    No reason given
Paediatric incentives and obligations for FNTA's drugs

For lonafarnib, tipifarnib: what EMA and FDA publish about paediatric plans, orphan status and pediatric approvals, and how many registered studies take children. Each line is a yes, no or not published fact from the record linked under it; none of it is a forecast.

  • EU paediatric investigation plan: yes · EMEA-002516-PIP02-21 (Lonafarnib, Hepatitis D virus infection): P: decision agreeing on a investigation plan, with or without partial waiver(s) and or deferral(s), 8 Jul 2022; EMEA-002871-PIP01-20 (tipifarnib, Treatment of head and neck epithelial malignant neoplasms): W: decision granting a waiver in all age groups for all conditions or indications, 22 Dec 2020; EMEA-002516-PIP01-18 (Lonafarnib, Treatment of Hutchinson-Gilford Progeria Syndrome;Treatment of progeroid laminopathies): P: decision agreeing on a investigation plan, with or without partial waiver(s) and or deferral(s), 16 Jul 2019; compliance positive 27 Mar 2020
    Rule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA data download (dated snapshot), 2026-11-11
  • EU orphan designation: yes · EU/3/20/2333 withdrawn 19 Oct 2020: Treatment of peripheral T-cell lymphoma; EU/3/05/269 withdrawn 10 Mar 2005: Treatment of acute myeloid leukaemia; EU/3/13/1225 positive 16 Jan 2014: Treatment of hepatitis delta virus infection; EU/3/18/2118 positive 14 Dec 2018: Treatment of Hutchinson-Gilford progeria
    Rule: An EU orphan designation lists the drug as its active substance (exact name) or belongs to a medicine that does; withdrawn and expired designations are listed with their status. Source: EMA data download (dated snapshot), 2026-11-11
  • Authorised in the EU: yes · Zokinvy: authorised since 18 Jul 2022, orphan medicine, exceptional circumstances
    Rule: An EMA medicine record lists the drug as its active substance or INN, exact name; national-only authorisations are not in this file. Source: EMA EPAR Zokinvy, 2026-11-11
  • FDA orphan designation: not published · FDA's orphan designation database turns away automated requests, so this app does not read it; search it by hand at the link
    Rule: Would be: an FDA orphan designation names the drug. Source: FDA orphan designations search
  • FDA pediatric oncology approval: no · FDA's table lists no pediatric approval of lonafarnib, tipifarnib
    Rule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-12
  • Registered studies open to children: yes · 25 interventional studies of lonafarnib, tipifarnib include patients under 18; 4 are recruiting, not yet recruiting or active
    Rule: The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age. Source: ClinicalTrials.gov search, 2026-11-12

Rare pediatric disease voucher. FDA, content current as of 29 Apr 2026: “As of February 3, 2026, enactment of the Consolidated Appropriations Act, 2026, the rare pediatric disease PRV program will sunset after September 30, 2029. FDA may not award any PRVs under this program after September 30, 2029.” Voucher sale prices are not shown here; they appear only as company-reported news. FDA: Rare Pediatric Disease Designation and Priority Review Voucher Programs

All 2 drugs and clinical candidates as a table

Each drug, stage and indication links to its Open Targets record, where the trials and approvals behind it are listed. Salt forms (for example a mesylate) are listed as Open Targets records them, as separate entries.

DrugTypeHighest stageIndicationsSource records
LONAFARNIBSmall moleculeapprovalHutchinson-Gilford progeria syndrome, laminopathy, progeroid syndrome, myelodysplastic syndrome, non-small cell lung carcinoma, chronic myelomonocytic leukemia, hepatitis D virus infection, transitional cell carcinoma, +17 moreOpen Targets · ChEMBL
TIPIFARNIBSmall moleculephase 3acute myeloid leukemia by FAB classification, malignant pancreatic neoplasm, pancreatic neoplasm, acute myeloid leukemia, myelodysplastic syndrome, human papilloma virus infection, mature T-cell and NK-cell non-Hodgkin lymphoma, small cell lung carcinoma, +43 moreOpen Targets · ChEMBL