eFFECTOR Presents Data on its Selective Translation Regulators at AACR 2019 Annual Meeting

SAN DIEGO, MARCH 29, 2019 – eFFECTOR Therapeutics, Inc., a leader in the development of selective translation regulators (STRs) for the treatment of cancer, today announced that data from all three of its pipeline programs – tomivosertib, eFT226 and its eIF4E program – will be presented at the AACR 2019 Annual Meeting in Atlanta, occurring March 29 through April 3.

In a late-breaking poster, eFFECTOR scientists detailed experiments demonstrating that tomivosertib enhances CAR T cell activity by modulating the differentiation of T cells into T stem cell memory and T central memory populations.

• Poster Title: “Tomivosertib (eFT508), a Potent and Highly Selective Inhibitor of MNK1 and MNK2, Enhances CAR T Cell Activity Through Modulating T Cell Differentiation”
• Abstract Link: https://www.abstractsonline.com/pp8/#!/6812/presentation/9203
• Submission Category: Immunology
Other presentations at AACR include:

eFT226 program
• Poster Title: “A focused CRISPR screen to identify synthetic lethal interactions with the novel eIF4A inhibitor eFT226 in KRAS driven NSCLC”
• Abstract Link: https://www.abstractsonline.com/pp8/#!/6812/presentation/3398
• Submission Category: Functional Genomics
• Oral Presentation Title: “eFT226: A Potent and Selective Inhibitor of eIF4A,
is Efficacious in Preclinical Models of Lymphoma”
• Abstract Link: https://www.abstractsonline.com/pp8/#!/6812/presentation/7503
• Submission Category: Preclinical Drug Development

eIF4E program
• Poster Title “Targeting hormone receptor-dependent cancers with potent, selective and orally-available small molecule inhibitors of eIF4E”
• Abstract Link: https://www.abstractsonline.com/pp8/#!/6812/presentation/5518
• Submission Category: Novel Targets and Pathways
Tomivosertib program
• Poster Title: “Physical and Functional Interactions between MNK and mTOR Signaling Regulate the Activation and Differentiation of T cells”
• Abstract Link: https://www.abstractsonline.com/pp8/#!/6812/presentation/3326
• Submission Category: Novel Immunomodulatory Agents
About Tomivosertib (eFT508)

Tomivosertib is eFFECTOR’s wholly-owned, highly selective translation regulator that inhibits MNK1 and MNK2 (MNK1/2) acting at the level of mRNA translation. The oral small molecule drug candidate promotes anti-tumor immune activity by selective down regulation of several immune checkpoint receptors and specific immunosuppressive cytokines.

Tomivosertib in being evaluated in ongoing Phase 2 clinical studies in cancers that may respond to MNK inhibition. Tomivosertib is being evaluated as an add-on when patients are experiencing insufficient response to an FDA-approved checkpoint inhibitor [NCT03616834] and in a separate study in patients with castration resistant prostate cancer [NCT03690141].

Please visit www.clinicaltrials.gov for further information on ongoing clinical studies of tomivosertib.

About eFT226
eFT226 is eFFECTOR’s wholly-owned sequence selective inhibitor of eIF4A1-dependent translation. eIF4A1 is an RNA helicase that facilitates the translation of select highly structured mRNA. In preclinical models and cancer cell lines, treatment with eFT226 leads to coordinated translational inhibition of key oncoproteins, including receptor tyrosine kinases HER2, EGFR, FGFR1/2 and c-MET, KRAS, CDK4 and CyclinD1/3, resulting in significant anti-tumor activity in breast cancer, lung cancer and hematologic tumor models. eFFECTOR is planning for the clinical evaluation of eFT226 in patients with select solid tumors.

About eFFECTOR Therapeutics

eFFECTOR Therapeutics is a clinical-stage biopharmaceutical company at the forefront of an emerging class of therapeutics known as selective translation regulators or STRs. By acting on key biological mechanisms responsible for tumor growth and immune suppression, STRs represent a promising small molecule approach for treating cancer. eFFECTOR’s most advanced program, tomivosertib (eFT508), is currently in Phase 2 clinical trials for the treatment of several types of cancer. eFFECTOR has entered into clinical collaborations with a strategic alliance between Pfizer and Merck KGaA to study tomivosertib in combination with avelumab and separately with Merck & Co to evaluate tomivosertib in combination with KEYTRUDA. Additionally, the company has an emerging pipeline of promising STR programs targeting well-known oncogenes and intractable targets. eFFECTOR maintains global rights to all of its development programs. For more information visit www.effector.com.


Amy Conrad
Juniper Point

Heidi Chokeir, Ph.D.
Canale Communications