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A Study of ATTR-01 in Participants With Select Epithelial Solid Tumours

A Phase 1-2 Master Protocol to Study Intravenous ATTR-01 in Adult Participants With Select Epithelial Solid Tumours Under Multiple Sub-protocols

Status
Recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06977737
Acronym
ATTEST
Enrollment
72
Registered
2025-05-18
Start date
2025-03-21
Completion date
2034-12-31
Last updated
2026-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Solid Tumor, Adult

Brief summary

ATTR-01 is the experimental drug being studied in the ATTEST clinical trial. The drug is made from a common cold virus that has been changed to only infect and multiply in cancer cells. This virus delivers an immune therapy drug into the cancer that is intended to promote a participant's own immune system to attack the cancer. The first part of this trial (sub-protocol A) is a phase 1 trial including dose escalation and expansion at one or more doses. It is the first time that ATTR-01 will be given to humans. If an optimal dose is identified, additional sub-protocols will be added by to further elicit whether ATTR-01 may successfully treat cancer. Expanded access is not available.

Interventions

Intravenous injection

Sponsors

Accession Therapeutics Limited
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Consenting male and female adults (18 years of age) with select solid epithelial tumour indications known to have high frequency (75 percent) of αvβ6 integrin receptor expression as detailed in the applicable SP. * Received and failed/intolerant of Standard of Care (SoC) therapy where eligible (not including neoadjuvant). * Tumour lesion (not previously irradiated), suitable for safe pre- and post-treatment biopsies. * Measurable disease by Response Evaluation Criteria in Solid Tumours (RECIST) Version 1.1. * Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) of 0 or 1. * Minimum life expectancy anticipated to be greater than three months * Willing to undertake appropriate measures of hygiene to prevent any spread of virus and protection of vulnerable individuals. * Adequate organ function. * Compliant with requirements for prior treatment washout and contraceptive measures applicable to genetically modified organisms (GMOs) and cancer therapies * Prior immune checkpoint antibody therapies as single agents or in combination with other anti-cancer agents is permissible.

Exclusion criteria

* Significant degree of fibrotic disease, including autoimmune diseases (e.g. systemic lupus, rheumatoid arthritis) or idiopathic and occupation-related pulmonary fibrosis. * Known prior history of intolerance to anti-programmed cell death protein 1 (PD-1) and/or anti-PD-L1 immunotherapy due to toxicity. * Has any of the comorbid conditions listed in the detailed protocol

Design outcomes

Primary

MeasureTime frameDescription
• Incidence of treatment emergent adverse events (AEs) [safety and tolerability]1 year, 2 years and 5 years
• Determination of the optimal dose of ATTR-011 year, 2 years and 5 years• Incidence of AEs, serious adverse events (SAEs), dose limiting toxicities (DLTs), discontinuation of investigational product(s) due to toxicity and clinically significant alterations in vital signs or other clinical safety assessments
• Objective Response Rate (ORR) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 years
Duration of Response (DoR) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 years

Secondary

MeasureTime frameDescription
Disease Control Rate (DCR) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 yearsFrom first scan onwards
Time To Response (TTR) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 yearsFrom first scan onwards
Progression Free Survival (PFS) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 yearsFrom first scan onwards
Overall Survival (OS) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 yearsFrom first scan onwards
Maximum reduction in tumour size [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 yearsFrom first scan onwards
Duration of Response (DoR) [Evaluation of the anti-tumour activity of ATTR-01 per RECIST V1.1]1 year, 2 years and 5 yearsFrom first scan onwards
To evaluate the viral persistence of ATTR-011 yearATTR-01 viral persistence/blood concentrations
To evaluate the immunogenicity of ATTR-011 yearImmunogenicity/Anti-ATTR-01-antibodies

Countries

Spain, United Kingdom

Contacts

CONTACTHardev Pandha, Professor
clinicaloperations@accessiontherapeutics.com+44 1865-950220
STUDY_DIRECTORHardev Pandha, Professor

Accession Therapeutics

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 23, 2026