Clinical Trials

Multiple clinical trials evaluate the therapeutic potential of tomivosertib (eFT508) as monotherapy and in combination regimens with agents like PD-1/PD-L1 inhibitors or paclitaxel across various oncological indications, including acute myeloid leukemia, breast cancer, lymphoma, solid tumors, non-small cell lung cancer, and hepatocellular carcinoma. Spanning Phase 1, Phase 1/2, and Phase 2, these investigations encompass actively recruiting, completed, terminated, and unknown trial statuses. The development landscape reflects diverse sponsorship from industry, academic institutions, government bodies, and cooperative research groups.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT04622007 UNKNOWN
Non-small Cell Lung Cancer
Effector Therapeutics
2021-06-02 PHASE2
NCT05744739 TERMINATED
Acute Myeloid Leukemia
Northwestern University
2023-09-29 PHASE1
NCT05744739 Recruiting
Acute Myeloid Leukemia
Northwestern University|National Cancer Institute (NCI)|EFFECTOR Therapeutics Inc.
2023-09-29 Phase 1
NCT04261218 COMPLETED
Breast Cancer
Translational Research in Oncology
2020-08-25 PHASE1
NCT03616834 COMPLETED
Solid Tumors
Effector Therapeutics
2018-07-25 PHASE2
NCT04261218 Completed
Breast Cancer
Translational Research in Oncology|Effector Therapeutics|Stand Up To Cancer
2020-08-25 Phase 1
NCT03690141 TERMINATED
Castrate-resistant Prostate Cancer (CRPC)
Effector Therapeutics
2018-11-27 PHASE2
NCT03258398 COMPLETED
Microsatellite Stable Relapsed or Refractory Colorectal Cancer
Effector Therapeutics
2017-09-18 PHASE2
NCT02605083 TERMINATED
Cancer
Effector Therapeutics
2015-12-03 PHASE1; PHASE2
NCT02937675 TERMINATED
Lymphoma
Effector Therapeutics
2017-02-08 PHASE1; PHASE2
NCT03318562 TERMINATED
Triple Negative Breast Cancer; Hepatocellular Carcinoma
Effector Therapeutics
2017-11-21 PHASE2
NCT02937675 Terminated
Lymphoma
Effector Therapeutics
2017-02-08 Phase 1|Phase 2
NCT02605083 Terminated
Cancer
Effector Therapeutics
2015-12-03 Phase 1|Phase 2

(data from https://clinicaltrials.gov, updated on 2024-04-30)

Check the Tomivosertib (eFT508) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

Tomivosertib (eFT508) selectively binds to and inhibits mitogen-activated protein kinase-interacting kinases 1 and 2 (MNK1/2) with IC50 values of 2.4 nM and 1 nM, respectively, thereby blocking downstream eukaryotic translation initiation factor 4E (eIF4E) phosphorylation and markedly downregulating PD-L1 protein expression. This molecular inhibition suppresses key oncogenic protein synthesis and impairs immune evasion, ultimately reducing tumor cell proliferation and driving antitumor efficacy in clinical trial settings such as acute myeloid leukemia, breast cancer, and advanced solid tumors.

Appendix RUO and cGMP Quality Standards

Quality Dimension RUO (Research Use Only) cGMP (Current Good Manufacturing Practice)
Clinical Applicability Prohibited in human clinical trials or medical diagnostics. Mandatory for human clinical trials (Phase I–III) and therapies.
Regulatory Status Non-regulated grade; exempt from drug manufacturing laws. Legally enforced by health authorities (e.g., FDA, EMA, NMPA).
Facility Environment Unclassified analytical or research laboratories. Validated Cleanrooms (ISO Class 5–8) with continuous monitoring.
Quality Control Basic purity and activity testing. Rigorous safety release testing (Sterility, Endotoxin, Mycoplasma).
Process Validation Basic equipment calibration; no process validation required. Full qualification (IQ/OQ/PQ) and complete batch records.
Quality Assurance Vendor self-declared without required formal QMS. Mandatory QA/QC unit, Change Control, CAPA, and vendor audits.
Regulatory Impact High risk of IND rejection if used as a critical raw material. Required for IND/NDA filings, supported by Drug Master Files (DMF).

Footnotes

Regulatory Note: Governed by FDA (21 CFR Parts 210/211/312), EMA (EudraLex Vol 4), ICH Guidelines (E6/Q7/Q9/Q10), and compendial standards (USP <71>/<85>/<1043>).

Note: Technical data last updated: Sep 1, 2026.