AEBi's own drug discovery

MuTaTo: a multi-targeted approach to cancer.

One drug, several targets on the same cell — designed so that resistance cannot arise from a single mutation. It is a published concept, built on 25 years of peptide platform work, and it is still in research.

Read the published paper

The concept

Why one target has never been enough.

Cancer is not a single disease with a single lock. Cells differ between patients, between tumours in one patient, and within a single tumour. A therapy that engages one receptor leaves the rest of that variation intact.

The MuTaTo concept starts from a different assumption: assume the tumour will escape, and design against that. Instead of one targeting moiety, attach several — different peptides that each recognise a different cell-surface feature — to a single toxin payload.

Because the same molecule engages several targets, a cell would need to lose all of them at once to survive. That is a far harder problem than mutating one receptor, and it is the core of AEBi's therapeutic hypothesis.

Peptides are the enabler. They are small, chemically synthesizable, and — crucially for this design — can be selected against almost any defined protein target using SoAP.

How the design works

Three moving parts.

01

Resistance comes from single targets

A drug aimed at one receptor gives a tumour a single problem to solve. A mutation in that receptor, or a shift in expression, is often enough for the cancer to continue growing.

02

Attack several at once

MuTaTo — Multi-Target Toxin — conjugates more than one targeting moiety to a toxin, so the same cancer cell is engaged at several points simultaneously. Escape requires several simultaneous changes.

03

The targeting comes from SoAP

Each targeting peptide is identified by AEBi's own screening platform, so the service activity and the therapeutic programme rest on one technology.

Published science

A concept in the literature, open to scrutiny.

The multi-targeted toxin approach was published in an open-access journal. The primary text is the appropriate reference.

SCIRP — open access paper

Research status — please read

  • There is no clinical trial of MuTaTo at present, in Israel or anywhere else.
  • AEBi's team are research scientists (Ph.D.). They are not physicians and do not hold the title "Dr." in a clinical sense.
  • AEBi operates no clinic and cannot advise on, treat or refer any individual case.
  • The treatment, in any case, would have to be individually adapted to the patient.
  • Initial therapeutic targets are lung, colon and head & neck cancers.

AEBi is a small team with a high volume of correspondence. Every initial enquiry is read; a reply cannot be guaranteed.

Programme data

What the programme has measured so far.

Preclinical work on the multi-targeted conjugate spans cell culture and animal models: target engagement, uptake into cells, and accumulation in tumour tissue.

Internalization of fluorescently labelled PEG-peptide into cancer cells in mice's tumours
Internalization of fluorescent PEG-peptide into cancer cells in mice's tumoursUpper part: fluorescently labelled cancer cells taken from the tumours 1 hour and 24 hours after injection. Lower part: the same cells under normal light, where cells that did not take up the peptide would appear.
Mice xenografts experiment with MuTaTo: mean tumour size of A549 xenografts treated with PBS versus MuTaTo
Mice xenografts experiment with MuTaToChange in the volume of A549 lung-cancer tumour xenografts in mice injected IV with PEG-E13.3-(PD-L1-GR)-M582-BIM. Blue: PBS control; red: MuTaTo; arrows mark injections. Each point is the mean tumour volume of 5 mice.
A549 cells after 48 hours of treatment with the single-targeting conjugate PEG-E13.3-BIM at 1 micromolar
In vitro efficacy experiment of MuTaTo — PEG-E13.3-BIM, 1 µMA549 lung-cancer cells after 48 hours. With one targeting peptide attached, the cell monolayer is still intact.
A549 cells after 48 hours of treatment with the dual-targeting conjugate PEG-E13.3-PD-L1-GR-BIM at 1 micromolar
In vitro efficacy experiment of MuTaTo — PEG-E13.3-PD-L1-GR-BIM, 1 µMThe same cells, at the same concentration, with both targeting peptides on the carrier: almost no intact cells remain.
Alamar Blue viability assay: percent viability of A549 cells for five conjugates at 100 and 1000 nanomolar
In vitro efficacy — Alamar Blue viability assayA549 cells after 48 hours with five conjugates at 100 nM and 1,000 nM, plotted as viability relative to the untreated control.
A549 cells after 48 hours with PEG-E13.3-PD-L1-GR-GW2 at 3, 1 and 0.3 micromolar, against a PBS vehicle control
A549 after 48 hours of treatment with PEG-E13.3-PD-L1-GR-GW2Concentrations of 3, 1 and 0.3 µM, against a PBS vehicle control.
A549 cells after 48 hours with PEG-E13.3-PD-L1-GR-M582-BIM at 3, 1, 0.3 and 0.1 micromolar, with a negative control
A549 after 48 hours of treatment with PEG-E13.3-PD-L1-GR-M582-BIMConcentrations of 3, 1, 0.3 and 0.1 µM, with a negative control.

Figures reproduced from AEBi study reports. These are research-stage preclinical observations, not peer-reviewed clinical data, and no conclusion about safety or efficacy in humans may be drawn from them.

The same platform

MuTaTo's targeting peptides derive from SoAP — the platform AEBi also operates for partners.

Screening services

Collaboration

Scientific enquiries.

AEBi welcomes exchanges with researchers, clinicians and companies working on multi-targeted approaches, and with partners seeking a screening programme on a specific target.

Contact AEBi