A Phase 1 Study for ZW251 in Participants with Solid Tumors.

2025-523088-39-00 Protocol ZWI-ZW251-101 Human pharmacology (Phase I) - First administration to humans Ongoing, recruiting

Start 28 Jan 2026 · Status Ongoing, recruiting · 3 EU/EEA countries · 11 sites · Protocol ZWI-ZW251-101

Overview

Sponsor-declared trial summary

Phase Human pharmacology (Phase I) - First administration to humans
Status Ongoing, recruiting
Participants planned 100
Countries 3
Sites 11

Advanced Solid Tumors

Key facts

Sponsor
Zymeworks Bc Inc.
Participant type
Patients
Age range
18-64 years, 65+ years
Gender
Male and Female
Therapeutic area
Diseases [C] - Neoplasms [C04]
Trial duration
28 Jan 2026 → ongoing
Decision date (initial)
2026-01-16
Transition trial
No
Low-intervention
No
Rare-disease indication
No
Vulnerable population
Yes

Trial design

CTIS Part I — objectives, methods, condition coding

Conditions and MedDRA coding

Advanced Solid Tumors

VersionLevelCodeTermSystem organ class
28.0 SOC 10029104 Neoplasms benign malignant and unspecified (incl cysts and polyps) 2

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Zymeworks Bc Inc.

Sponsor organisation
Zymeworks Bc Inc.
Address
1385 8th Avenue West Suite 540
City
Vancouver
Postcode
V6H 3V9
Country
Canada

Scientific contact point

Organisation
Zymeworks Bc Inc.
Contact name
Maggie Weinstein

Public contact point

Organisation
Zymeworks Bc Inc.
Contact name
Maggie Weinstein

Locations

3 EU/EEA countries · 11 investigational sites

By country

CountryMS statusPlanned subjectsSites
Ireland Authorised, recruiting 3 1
Portugal Ongoing, recruiting 6 2
Spain Ongoing, recruiting 22 8
Rest of world
Taiwan, United States, Japan
69

Investigational sites

Ireland

1 site · Authorised, recruiting
Mater Misericordiae University Hospital
Oncology, Eccles Street, D07 R2WY, Dublin 7

Portugal

2 sites · Ongoing, recruiting
Start Research Portugal Unipessoal Lda.
N/A, Rua Castilho 39 8º E, 1250-068, Lisbon
Unidade Local De Saude De Gaia/Espinho E.P.E.
Unidade de Fase 1, Rua Conceicao Fernandes S/n, 4434-502, Vila Nova De Gaia

Spain

8 sites · Ongoing, recruiting
Hospital Hm Nou Delfos
Oncology, Avinguda De Vallcarca 151, 08023, Barcelona
Hospital San Pedro
Oncology, Calle Piqueras 98, 26006, Logrono
Clinica Universidad De Navarra
Oncology, Pio XII Etorbidea 36, 31008, Pamplona
Hospital Universitari Vall D Hebron
Oncology, Passeig De La Vall D'Hebron 119-129, 08035, Barcelona
Hospital Universitario Fundacion Jimenez Diaz
Oncology, Avenida De Los Reyes Catolicos 2, 28040, Madrid
Hospital Universitario Virgen De La Victoria
Oncology, Campus De Teatinos Sn, Puerto De La Torre, Malaga
Hospital Universitario Hm Sanchinarro
Oncology, Calle Ona 10, 28050, Madrid
Hospital Universitario Quironsalud Madrid
Oncology, Calle De Diego De Velazquez 1, 28223, Pozuelo De Alarcon

Country notifications

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

Country Trial startTrial end Recruitment startRecruitment end Early termination
Ireland 2026-02-12
Portugal 2026-01-28 2026-02-13
Spain 2026-02-09 2026-02-17

Application history

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

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2025-09-10 Spain Acceptable
2026-01-14
2026-01-15
2 SUBSTANTIAL MODIFICATION SM-1 2026-03-24 Spain Acceptable
2026-05-28
2026-05-29