A study to find a suitable dose of ASP5834 in adults with solid tumors

2025-522082-29-00 Protocol 5834-CL-1001 Human pharmacology (Phase I) - First administration to humans Ongoing, recruiting

Start 16 Jan 2026 · Status Ongoing, recruiting · 2 EU/EEA countries · 7 sites · Protocol 5834-CL-1001

Overview

Sponsor-declared trial summary

Phase Human pharmacology (Phase I) - First administration to humans
Status Ongoing, recruiting
Participants planned 364
Countries 2
Sites 7

Locally advanced (unresectable) or metastatic solid tumor malignancies who harbor a KRAS mutation (G12V, G12D, G12C, G12A, G12R or G13D mutation) or KRAS amplification

Key facts

Sponsor
Astellas Pharma Inc.
Participant type
Patients
Age range
18-64 years, 65+ years
Gender
Male and Female
Therapeutic area
Diseases [C] - Neoplasms [C04]
Trial duration
16 Jan 2026 → ongoing
Decision date (initial)
2025-11-28
Transition trial
No
Low-intervention
No
Rare-disease indication
No
Vulnerable population
Yes

External identifiers

EU CT number
2025-522082-29-00
ClinicalTrials.gov
NCT07094204

Trial design

CTIS Part I — objectives, methods, condition coding

Conditions and MedDRA coding

Locally advanced (unresectable) or metastatic solid tumor malignancies who harbor a KRAS mutation (G12V, G12D, G12C, G12A, G12R or G13D mutation) or KRAS amplification

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Astellas Pharma Inc.

Sponsor organisation
Astellas Pharma Inc.
Address
2-5-1, Nihonbashi-Honcho Nihonbashi-Honcho
City
Chuo-Ku
Postcode
103-8411
Country
Japan

Scientific contact point

Organisation
Astellas Pharma Inc.
Contact name
Head of Clinical Trial Unit Regulatory Affairs

Public contact point

Organisation
Astellas Pharma Inc.
Contact name
Head of Clinical Trial Unit Regulatory Affairs

Locations

2 EU/EEA countries · 7 investigational sites

By country

CountryMS statusPlanned subjectsSites
France Ongoing, recruiting 40 4
Spain Ongoing, recruiting 30 3
Rest of world
Korea, Republic of, United States, Japan
294

Investigational sites

France

4 sites · Ongoing, recruiting
Hospices Civils De Lyon
Medical Oncology, 165 Chemin Du Grand Revoyet, 69310, Pierre Benite
Institut Gustave Roussy
Medicine, 114 Rue Edouard Vaillant, 94800, Villejuif
Institut Bergonie
Medical Oncology, 180 R De Saint Genes, 229 Cours De L Argonne, Bordeaux
Centre Leon Berard
Medical Oncology, 28 Rue Laennec, 69008, Lyon

Spain

3 sites · Ongoing, recruiting
Hospital Universitario Fundacion Jimenez Diaz
Oncology, Avenida De Los Reyes Catolicos 2, 28040, Madrid
Hospital Universitario 12 De Octubre
Medical Oncology, Avenida De Cordoba Sn, 28041, Madrid
Hospital Universitari Vall D Hebron
Medical Oncology, Passeig De La Vall D'Hebron 119-129, 08035, Barcelona

Country notifications

Trial-start, recruitment-start, end and early-termination notifications submitted per Member State

Country Trial startTrial end Recruitment startRecruitment end Early termination
France 2026-01-21 2026-01-21
Spain 2026-01-16 2026-01-16

Application history

4 submissions — initial application plus substantial / non-substantial modifications

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2025-08-18 Spain Acceptable with conditions
2025-11-28
2025-11-28
2 SUBSTANTIAL MODIFICATION SM-1 2026-02-20 Spain Acceptable
2026-03-27
2026-03-31
3 NON SUBSTANTIAL MODIFICATION NSM-1 2026-04-15 Spain Acceptable
2026-03-27
2026-04-15
4 SUBSTANTIAL MODIFICATION SM-2 2026-05-12 Acceptable 2026-05-27