Evaluation of Efficacy, Safety, and Tolerability of Povetacicept in Subjects With Primary Membranous Nephropathy

2025-521661-27-00 Protocol VX24-AIS-D10 Phase II and Phase III (Integrated) Ongoing, recruiting

Start 19 Dec 2025 · Status Ongoing, recruiting · 7 EU/EEA countries · 24 sites · Protocol VX24-AIS-D10

Overview

Sponsor-declared trial summary

Phase Phase II and Phase III (Integrated)
Status Ongoing, recruiting
Participants planned 121
Countries 7
Sites 24

Primary Membranous Nephropathy

To evaluate the efficacy of povetacicept in subjects with pMN

Key facts

Sponsor
Vertex Pharmaceuticals Inc.
Participant type
Patients
Age range
18-64 years, 65+ years
Gender
Male and Female
Therapeutic area
Diseases [C] - Immune System Diseases [C20]
Trial duration
19 Dec 2025 → ongoing
Decision date (initial)
2025-12-12
Transition trial
No
Low-intervention
No
Rare-disease indication
Yes
Vulnerable population
Yes

Trial design

CTIS Part I — objectives, methods, condition coding

Main objective

Scope: Safety, Efficacy

To evaluate the efficacy of povetacicept in subjects with pMN

Secondary objectives 1

  1. To evaluate the safety and tolerability of povetacicept in subjects with pMN

Conditions and MedDRA coding

Primary Membranous Nephropathy

VersionLevelCodeTermSystem organ class
21.1 LLT 10027170 Membranous nephropathy 10038359

Eligibility criteria

Principal inclusion / exclusion criteria as submitted by sponsor

Inclusion criteria 2

  1. Diagnosed with pMN with confirmatory historical biopsy. If no historical biopsy was performed that confirmed pMN, a biopsy can be performed during Screening to confirm eligibility.
  2. Other protocol defined Inclusion/Exclusion criteria will apply

Exclusion criteria 2

  1. Hypersensitivity to investigational medicinal product or to any of its excipients.
  2. Other protocol defined Inclusion/Exclusion criteria will apply

Endpoints

Primary and secondary outcome measures (English text)

Primary endpoints 1

  1. Proportion of Participants with Complete Clinical Remission Definition 1 (CR1) CR1 [Time Frame: At Week 72]

Secondary endpoints 3

  1. Proportion of Participants with Complete Clinical Remission Definition 2 (CR2). [Time Frame: At Week 72]
  2. Proportion of Participants with Overall Clinical Remission (OR). [Time Frame: At Week 72]
  3. Safety and tolerability as determined by AEs, clinical laboratory values, standard 12-lead ECGs, and vital signs

Investigational products

Investigational medicinal products (IMPs), comparators, placebo, auxiliary

Test 3

ALPN-303 Solution for Injection in Pre-filled Pen

PRD12449111 · Product

Active substance
Povetacicept
Substance synonyms
Transmembrane activator and CAML interactor,fragment 68-110 variant (K77>E10, F78>Y11, Y102>D35), fused to a IgG1 variant (C55>S, L69>A, L70>E, G72>A, C-terminal K282 deleted), ALPN-303, TACI vTD-Fc, 68-110-TNF receptor superfamily protein 13B [77-glutamic acid, 78-tyrosine, 102-asparatic acid] (human) fusion with peptide linker (GSGGGGS) fusion with IgG1 [5-serine, 19-alanine, 20-glutamic acid, 22-alanine, de-C-terminal lysine] (human gamma-1-chain C-region C-terminal fragment), dimer
Other product name
Povetacicept
Pharmaceutical form
SOLUTION FOR INJECTION IN PRE-FILLED PEN
Route of administration
SUBCUTANEOUS INJECTION
Max daily dose
00 mg milligram(s)
Max total dose
00 mg milligram(s)
Max treatment duration
104 Week(s)
Authorisation status
Not Authorised
MA holder
VERTEX PHARMACEUTICALS, INCORPORATED
Paediatric formulation
No
Orphan designation
Yes
Orphan designation number
EU/3/26/3205

ALPN-303 solution for injection in pre-filled syringe

PRD12198433 · Product

Active substance
Povetacicept
Other product name
Povetacicept
Pharmaceutical form
SOLUTION FOR INJECTION IN PRE-FILLED SYRINGE
Route of administration
SUBCUTANEOUS INJECTION
Max daily dose
00 mg milligram(s)
Max total dose
00 mg milligram(s)
Max treatment duration
104 Week(s)
Authorisation status
Not Authorised
MA holder
VERTEX PHARMACEUTICALS, INCORPORATED
Paediatric formulation
No
Orphan designation
Yes
Orphan designation number
EU/3/26/3205

ALPN-303 solution for injection

PRD12198369 · Product

Active substance
Povetacicept
Other product name
Povetacicept
Pharmaceutical form
SOLUTION FOR INJECTION
Route of administration
SUBCUTANEOUS INJECTION
Max daily dose
00 mg milligram(s)
Max total dose
00 mg milligram(s)
Max treatment duration
104 Week(s)
Authorisation status
Not Authorised
MA holder
VERTEX PHARMACEUTICALS, INCORPORATED
Paediatric formulation
No
Orphan designation
Yes
Orphan designation number
EU/3/26/3205

Comparator 3

Tacrolimus

SUB10797MIG · Substance

Active substance
Tacrolimus
Pharmaceutical form
CAPSULE, HARD
Route of administration
ORAL USE
Max daily dose
00 mg/kg milligram(s)/kilogram
Max total dose
00 mg/kg milligram(s)/kilogram
Max treatment duration
52 Week(s)
Authorisation status
Authorised
ATC code
- — -
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Tacrolimus

SUB10797MIG · Substance

Active substance
Tacrolimus
Pharmaceutical form
CAPSULE, HARD
Route of administration
ORAL
Max daily dose
00 mg/kg milligram(s)/kilogram
Max total dose
00 mg/kg milligram(s)/kilogram
Max treatment duration
52 Week(s)
Authorisation status
Authorised
ATC code
- — -
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Tacrolimus

SUB10797MIG · Substance

Active substance
Tacrolimus
Pharmaceutical form
CAPSULE, HARD
Route of administration
ORAL USE
Max daily dose
00 mg/kg milligram(s)/kilogram
Max total dose
00 mg/kg milligram(s)/kilogram
Max treatment duration
52 Week(s)
Authorisation status
Authorised
ATC code
- — -
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Placebo 1

Test IMP without active substance

N/A · Product

Other product name
N/A
Pharmaceutical form
N/A
ATC code
N/A — N/A
Marketing authorisation
N/A
MA holder
N/A
MA country
Iceland
Paediatric formulation
No

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Vertex Pharmaceuticals Inc.

Sponsor organisation
Vertex Pharmaceuticals Inc.
Address
50 Northern Avenue
City
Boston
Postcode
02210-1862
Country
United States

Scientific contact point

Organisation
Vertex Pharmaceuticals Inc.
Contact name
Clinical Trials and Medical Info

Public contact point

Organisation
Vertex Pharmaceuticals Inc.
Contact name
Clinical Trials and Medical Info

Locations

7 EU/EEA countries · 24 investigational sites

By country

CountryMS statusPlanned subjectsSites
Czechia Ongoing, recruiting 2 2
Germany Ongoing, recruiting 5 4
Hungary Ongoing, recruiting 3 1
Ireland Ongoing, recruiting 4 4
Italy Ongoing, recruiting 8 5
Netherlands Authorised, recruitment pending 3 2
Spain Ongoing, recruiting 5 6
Rest of world
Korea, Republic of, China, United States, Japan, United Kingdom, Brazil, Australia
91

Investigational sites

Czechia

2 sites · Ongoing, recruiting
Vseobecna Fakultni Nemocnice V Praze
D10-510: Klinika nefrologie, U Nemocnice 499/2, Nove Mesto, Prague
Fakultni Nemocnice Kralovske Vinohrady
D10-509: Interni klinika, Srobarova 1150/50, Vinohrady, Prague

Germany

4 sites · Ongoing, recruiting
Universitaetsklinikum Wuerzburg AöR
D10-511: Innere Medizin, Nephrologie, Josef-Schneider-Strasse 2, Grombuehl, Wuerzburg
Charite Universitaetsmedizin Berlin KöR
D10-512: Nephrologie, Hindenburgdamm 30, Lichterfelde, Berlin
Universitaetsklinikum Leipzig AöR
D10-538: Endokrinologie, Nephrologie, Rheumatologie, Liebigstrasse 20, Zentrum-Suedost, Leipzig
Klinikum St. Georg gGmbH
D10-513: Nephrology, Delitzscher Strasse 141, Eutritzsch, Leipzig

Hungary

1 site · Ongoing, recruiting
University Of Szeged
D10-536 : Belgyógyászati Klinika, Kalvaria Sugarut 57, 6725, Szeged

Ireland

4 sites · Ongoing, recruiting
Beaumont Hospital
D10-514 : Nephrology, Beaumont Road, Beaumont, Dublin 9
Cork University Hospital
D10-537 : Nephrology, Wilton, T12 DC4A, Cork
St Vincent's University Hospital
D10-515 : Nephrology, Elm Park Merrion Road, D04 T6F4, Dublin 4
University Hospital Galway
D10-516 : Nephrology, Newcastle Road, H91 YR71, Galway

Italy

5 sites · Ongoing, recruiting
Fondazione IRCCS Policlinico San Matteo
D10-524: SC Nefrologia e Dialisi - Abilitazione al Trapianto, Viale Camillo Golgi 19, 27100, Pavia
Azienda Universitaria Ospedaliera Consorziale Policlinico Bari
D10-518: U.O.C. Nefrologia, Dialisi e Trapianto, Piazzale Giulio Cesare 11, 70124, Bari
Istituti Clinici Scientifici Maugeri S.p.A. Societa' Benefit In Forma Abbreviata Istituti Clinici Scientifici Maugeri S.p.A. Sb O Anche Ics Maugeri S.p.A. Sb O Maugeri S.p.A. Sb
D10-522: UO Nefrologia e Dialisi, Via Salvatore Maugeri 10, 27100, Pavia
IRCCS Ospedale Policlinico San Martino
D10-520: Clinica Nefrologica, Dialisi e Trapianto, Largo Rosanna Benzi 10, 16132, Genoa
Azienda Ospedaliera Universitaria Federico II Di Napoli
D10-521: UOC Nefrologia, Via Sergio Pansini 5, 80131, Naples

Netherlands

2 sites · Authorised, recruitment pending
Radboud universitair medisch centrum Stichting
D10-539: Nephrology, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen
Amsterdam UMC Stichting
D10-525: Nephrology, Meibergdreef 9, 1105 AZ, Amsterdam

Spain

6 sites · Ongoing, recruiting
Hospital Universitario Del Vinalopo
D10-526 : Nephrology, Calle Tonico Sansano Mora 14, 03293, Elche
Hospital Universitari Vall D Hebron
D10-529: Nephrology, Passeig De La Vall D'Hebron 119-129, 08035, Barcelona
Hospital Polusa S.A.
D10-528 : Nephrology, Calle Del Doctor Iglesias Otero S/N, San Lazaro Del Puente, Lugo
Hospital Universitario Virgen De La Macarena
D10-530 : Nephrology, Avenida Del Doctor Fedriani 3, 41009, Sevilla
Clinica Universidad De Navarra
D10-543 : Nephrology, Pio XII Etorbidea 36, 31008, Pamplona
Hospital Universitario Reina Sofia
D10-542 : Nephrology, Avenida Menendez Pidal S/n, 14004, Cordoba

Country notifications

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

Country Trial startTrial end Recruitment startRecruitment end Early termination
Czechia 2026-03-16 2026-04-08
Germany 2025-12-23 2026-03-03
Hungary 2026-03-03 2026-03-25
Ireland 2026-03-24 2026-04-14
Italy 2026-02-26 2026-04-07
Spain 2025-12-19 2026-03-27

Results and documents

Annex IV summary of results, Annex V layperson summary, and all documents registered in CTIS for this trial

Documents 85 files

Public protocol annexes, IB summaries, regulatory submissions and post-authorisation documents registered in CTIS.

TypeTitleVersion
Protocol (for publication) D1_Protocol ENG 2025-521661-27-00 Redacted 4.0
Protocol (for publication) D4_Patient facing document_PRO_1_Placeholder 1
Protocol (for publication) D4_Patient facing document_PRO_2_Placeholder 1
Recruitment arrangements (for publication) K1_CZE Country ICF Procedure CZ-English_VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_DEU Recruitment Procedure Description incl ICF Proc English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_ESP Recruitment Procedure Description English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_IRL Recruitment Brochure English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_IRL Recruitment Other Factsheet English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_IRL Recruitment Other ID Card English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K1_IRL Recruitment Poster English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K1_IRL Recruitment Procedure Description English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_ITA Country ICF Procedure & Recruit Procedure English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_ITA Recruitment Brochure Italian VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_ITA Recruitment Disease Fact Sheet Italian VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K1_ITA Recruitment Other HCP Engagement Deck English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K1_ITA Recruitment Poster Italian VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K1_NLD Recruitment Procedure Description English VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_CZE Recruitment Brochure PA 3 Czech VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_CZE Recruitment Disease Fact Sheet PA3 Czech VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_CZE Site Staff Training Materials English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_DEU Recruitment Brochure German VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_DEU Recruitment Disease Fact Sheet German VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_DEU Recruitment Poster German VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_DEU Site Staff Training Materials HCP slide deck English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_ESP Recruitment Brochure Spanish VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_ESP Recruitment Other HCP Deck English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_ESP Recruitment Other Study Factsheet Spanish VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_ESP Recruitment Poster Spanish VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_HUN Recruitment Brochure Hungarian VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_HUN Recruitment Dear Colleague Letter Referral Card Hungarian VX24-AIS-D10 Public 1.1
Recruitment arrangements (for publication) K2_HUN Recruitment Dear Colleague Letter Referral Letter Hungarian VX24-AIS-D10 Public 1.1
Recruitment arrangements (for publication) K2_HUN Recruitment Disease Fact Sheet Hungarian VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_HUN Recruitment Poster Hungarian VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_HUN Site Staff Training Materials HCP Recruitment English VX24-AIS-D10 Public 1.1
Recruitment arrangements (for publication) K2_IRL Site Staff Training Materials HCP Deck English VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_NLD Recruitment Brochure Dutch VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_NLD Recruitment Disease Fact Sheet Dutch VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_NLD Recruitment Other HCP Engagement Deck Dutch VX24-AIS-D10 Public 1.0
Recruitment arrangements (for publication) K2_NLD Recruitment Poster Dutch VX24-AIS-D10 Public 2.0
Recruitment arrangements (for publication) K2_Recruitment material_Poster_CZ_VX24-AIS-D10 Public 1.0
Subject information and informed consent form (for publication) L1_CZE Country ICF - Other Adult Additional Czech VX24-AIS-D10 Public 1.0
Subject information and informed consent form (for publication) L1_CZE Country ICF - Other Adult Czech VX24-AIS-D10 Public 2.0
Subject information and informed consent form (for publication) L1_CZE Country ICF - Privacy Adult Czech VX24-AIS-D10 Public 1.0
Subject information and informed consent form (for publication) L1_CZE Country ICF Main Adult Phase 2b Czech VX24-AIS-D10 Public 2.0
Subject information and informed consent form (for publication) L1_CZE Country ICF Main Adult Phase 3 Czech VX24-AIS-D10 Public 2.0
Subject information and informed consent form (for publication) L1_DEU Country ICF - Pregnant Form German VX24-AIS-D10 Public 1.1
Subject information and informed consent form (for publication) L1_DEU Country ICF Main Phase 2b German VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_DEU Country ICF Main Phase 3 German VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_ESP Country ICF - Pregnant Form Spanish VX24-AIS-D10 Public 2.0
Subject information and informed consent form (for publication) L1_ESP Country ICF Main Phase 2b Spanish VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_ESP Country ICF Main Phase 3 Spanish VX24-AIS-D10 Public 2.2
Subject information and informed consent form (for publication) L1_HUN Country ICF - Pregnant Form Adult Hungarian VX24-AIS-D10 Public 1.1
Subject information and informed consent form (for publication) L1_HUN Country ICF Main Adult Phase 2b Hungarian VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_HUN Country ICF Main Adult Phase 3 Hungarian VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_HUN Form List of Submitted documents part II Hungary VX24-AIS-D10 1.0
Subject information and informed consent form (for publication) L1_HUN Form VX24-AIS-D10 1.0
Subject information and informed consent form (for publication) L1_HUN Subject Participation Card 1 Hungarian VX24-AIS-D10 Public 1
Subject information and informed consent form (for publication) L1_ICF Pregnant Form Adult_CZ_VX24-AIS-D10 Public 1.0
Subject information and informed consent form (for publication) L1_ICF-Privacy Adult Pregnant Partner_CZ_VX24-AIS-D10 Public 1.0
Subject information and informed consent form (for publication) L1_IRL Country ICF - Pregnant Form English VX24-AIS-D10 Public 1.0
Subject information and informed consent form (for publication) L1_IRL Country ICF Main P2b English VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_IRL Country ICF Main P3 English VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_ITA Country ICF - Data Protection Adult Italian VX24-AIS-D10 Public 1.1
Subject information and informed consent form (for publication) L1_ITA Country ICF - Pregnant Form Adult Italian VX24-AIS-D10 Public 1.1
Subject information and informed consent form (for publication) L1_ITA Country ICF Main Adult Phase 2b Italian VX24-AIS-D10 Public 2.0
Subject information and informed consent form (for publication) L1_ITA Country ICF Main Adult Phase 3 Italian VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_NLD Country ICF - Pregnant Form Pregnancy ICF Dutch VX24-AIS-D10 Public 1.2
Subject information and informed consent form (for publication) L1_NLD Country ICF Main Phase 2b Dutch VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_NLD Country ICF Main Phase 3 Dutch VX24-AIS-D10 Public 2.1
Subject information and informed consent form (for publication) L1_NLD Country ICF Optional Vendor Dutch VX24-AIS-D10 Public 1.1
Subject information and informed consent form (for publication) L2_Other Subject Participation Card_CZ_VX24-AIS-D10 Public 1.0
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC Tacrolimus capsule 1
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC Tacrolimus capsule 1
Synopsis of the protocol (for publication) D1_Protocol lay summary CS 2025-521661-27-00 - Redacted 4
Synopsis of the protocol (for publication) D1_Protocol lay summary ENG 2025-521661-27-00 - Redacted 4
Synopsis of the protocol (for publication) D1_Protocol lay summary ES 2025-521661-27-00 - Redacted 4
Synopsis of the protocol (for publication) D1_Protocol lay summary HU 2025-521661-27-00 - Redacted 4
Synopsis of the protocol (for publication) D1_Protocol lay summary IT 2025-521661-27-00 - Redacted 4
Synopsis of the protocol (for publication) D1_Protocol lay summary NL 2025-521661-27-00 - Redacted 4
Synopsis of the protocol (for publication) D1_Protocol synopsis CS 2025-521661-27-00 Redacted 4.0
Synopsis of the protocol (for publication) D1_Protocol synopsis ENG 2025-521661-27-00 Redacted 4.0
Synopsis of the protocol (for publication) D1_Protocol synopsis ES 2025-521661-27-00 Redacted 4.0
Synopsis of the protocol (for publication) D1_Protocol synopsis HU 2025-521661-27-00 Redacted 4.0
Synopsis of the protocol (for publication) D1_Protocol synopsis IT 2025-521661-27-00 Redacted 4.0
Synopsis of the protocol (for publication) D1_Protocol synopsis NL 2025-521661-27-00 Redacted 4.0

Application history

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

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2025-08-25 Germany Acceptable with conditions
2025-12-11
2025-12-12
2 SUBSTANTIAL MODIFICATION SM-1 2026-02-20 Germany Acceptable
2026-05-19
2026-05-19
3 NON SUBSTANTIAL MODIFICATION NSM-1 2026-06-01 Acceptable
2026-05-19
2026-06-01
4 NON SUBSTANTIAL MODIFICATION NSM-2 2026-06-03 Acceptable
2026-05-19
2026-06-03