We believe that stabilized cell-permeating peptide therapeutics have the potential to become a major class of drugs for oncology and other diseases.

Our Pipeline

Last updated: 12.05.2019


ALRN-6924 is a first-in-class, stabilized cell-permeating alpha-helical peptide that mimics the p53 tumor suppressor protein to disrupt p53’s interactions with its endogenous inhibitors, MDMX and MDM2.

Our clinical development program is focused on a Phase 1b/2 clinical trial to protect cancer patients against chemotherapy-induced toxicities (a therapeutic concept known as “myelopreservation”), and a Phase 2 clinical trial in combination with Pfizer’s palbociclib (Ibrance®) for the treatment of patients with MDM2-amplified advanced solid tumors.


Chemotherapies used to treat cancer patients can cause toxicities in normal tissues and organs, thereby limiting the dose and schedule of these drugs and reducing their efficacy. This is because these drugs lack specificity for cancer cells and can damage normal, healthy cells.  We believe that treatment of patients with ALRN-6924 can reduce the toxic effects of chemotherapy in the bone marrow while having no adverse effect on the anti-cancer activity of chemotherapy against p53-mutant tumor cells.

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MDM2-Amplified Tumors

Amplification of the gene encoding MDM2, an endogenous inhibitor of the p53 tumor suppressor protein, is an oncogenic event found in 2-4% of all cancers.   In November 2018, we announced a collaboration with Pfizer to evaluate the combination of ALRN-6924 and palbociclib in patients with MDM2-amplified solid tumors.

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