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Microvascular InflammationPhase 2TRANSPIRENCT07219043

A Study to Learn About the Effects of Felzartamab Infusions in Adults With Kidney Transplants Who Have Late Isolated Microvascular Inflammation

A Phase 2 study testing Felzartamab in people with Microvascular Inflammation, run by Biogen at 53 sites in 11 countries.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

In this study, researchers will learn more about a drug called felzartamab in people who have received a kidney transplant and later developed a condition called microvascular inflammation (MVI). MVI is a type of injury to small blood vessels in the transplanted kidney and may be a sign of rejection by the body. Read more about this study

Who is it for?
Ages 18 to 74 years
Conditions the study is for
Microvascular Inflammation
What is being tested?
Felzartamab
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
81 participants
Where
53 sitesin 11 countries
Study dates
5 Jan 2026to 10 Feb 2028
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 74 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • MVI (MVI ≥2), donor specific antibody (DSA)-negative that is either complement activation (C4d) negative or C4d positive (biopsy-confirmed) without T cell-mediated rejection (TCMR) per central reading, as defined by the Banff 2022 criteria.
  • Biopsy must be prior to randomization.
  • For participants who received any prior treatment for antibody-mediated rejection (AMR) or MVI, the biopsy must be performed after completing (or stopping) prior treatment.
  • Kidney transplant prior to Screening visit (recipients of either living or deceased donors).

Who cannot join

  • Transplant: Blood type (ABO)-incompatible transplant.
  • History of multiple organ transplants including en bloc and dual kidney transplants.
  • Acute, rapid decline in renal function, defined as a participant likely to require renal replacement therapy within the next 30 days as determined by the Investigator.
  • Note: Other protocol-defined Inclusion/Exclusion criteria may apply.

Trial locations and contacts

53 sites in 11 countries. Contact the study team or a site near you to ask about taking part.

US Biogen Clinical Trial Center contact

866-633-4636

clinicaltrials@biogen.com

Global Biogen Clinical Trial Center contact

clinicaltrials@biogen.com

53 sites in 11 countries

United States25 sites, 25 recruiting
  • University of Michigan Medical Center

    Ann Arbor, Michigan, 48109-5650

    734-936-6381

    Mona Doshi

    Recruiting
  • University of Colorado

    Aurora, Colorado, 80045

    720-848-0860

    James Coooper

    Recruiting
  • University of Chicago Medical Center

    Chicago, Illinois, 60637

    773-702-1220

    Beatrice Concepcion

    Recruiting
  • Cleveland Clinic

    Cleveland, Ohio, 44195

    216-444-5383

    Emilio Poggio

    Recruiting
  • The Ohio State University

    Columbus, Ohio, 43210

    614-293-4997

    Todd Pesavento

    Recruiting
  • University of Texas Southwestern Medical Center

    Dallas, Texas, 75390

    617-724-9673

    David Wojciechowski

    Recruiting
  • Duke University Hospital

    Durham, North Carolina, 27710

    919-681-2533

    Scott Sanoff

    Recruiting
  • Houston Methodist Hospital

    Houston, Texas, 77030

    713-441-6174

    Osama Gaber

    Recruiting
  • The University of Kansas Medical Center

    Kansas City, Kansas, 66160

    913-574-0084

    Diane Cibrik

    Recruiting
  • Loma Linda University Medical Center

    Loma Linda, California, 92350

    909-558-3722

    Rafael Villicana

    Recruiting
  • Keck Hispital of University of Southern California (USC)

    Los Angeles, California, 90033

    800-872-2273

    Thin Thin Maw

    Recruiting
  • Cedars-Sinai Medical Center

    Los Angeles, California, 90048

    310-423-2641

    Edmund Huang

    Recruiting
  • University of California, Los Angeles

    Los Angeles, California, 90095

    310-794-8516

    Suphamai Brunnapradist

    Recruiting
  • Medical College of Wisconsin

    Milwaukee, Wisconsin, 53226

    414-805-6060

    Matthew Cooper

    Recruiting
  • Vanderbilt University Medical Center

    Nashville, Tennessee, 37232

    615-322-6976

    Tony Langone

    Recruiting
  • University of Nebraska Medical Center

    Omaha, Nebraska, 68198

    402-559-9235

    Eric Langewisch

    Recruiting
  • Providence St. Joseph Hospital Orange

    Orange, California, 92868

    714-771-8000

    Yasir Qazi

    Recruiting
  • Penn Medicine - Hospital of the University of Pennsylvania

    Philadelphia, Pennsylvania, 19104

    215-614-4274

    Roy Bloom

    Recruiting
  • Virginia Commonwealth University (VCU) Medical Center (Main Hospital) Hume-Lee Transplant Center

    Richmond, Virginia, 23298

    804-828-1855

    Gaurav Gupta

    Recruiting
  • Mayo Clinic Rochester

    Rochester, Minnesota, 55905

    507-266-6953

    Carrie Schinstock

    Recruiting
  • Sutter Health - California Pacific Medical Center

    San Francisco, California, 94115

    415-600-1063

    Ram V. Peddi

    Recruiting
  • University of California San Fransisco (UCSF) Medical Center

    San Francisco, California, 94158

    412-518-0094

    Puneet Sood

    Recruiting
  • University of Washington Medical Center

    Seattle, Washington, 98195

    206-598-5896

    Nicolae Leca

    Recruiting
  • Washington University School of Medicine

    St Louis, Missouri, 63110

    314-362-8351

    Tarek Alhamad

    Recruiting
  • Cooperman Barnabas Medical Center

    West Orange, New Jersey, 07039

    973-322-2146

    Anup Patel

    Recruiting

Other trials in United States

Spain5 sites, 5 recruiting
  • Hospital Del Mar

    Barcelona, 8003

    34 932 483 162

    Marta Crespo

    Recruiting
  • Hospital Universitario Vall d'Hebron

    Barcelona, 8035

    932 607 385 ext. +34

    Oriol Bestard

    Recruiting
  • Hospital Clínic de Barcelona

    Barcelona, 8036

    +34 932 275 444

    Fritz Diekmann

    Recruiting
  • Hospital Universitario de Bellvitge

    Barcelona, 8907

    34 932 607 385

    Edoardo Melilli

    Recruiting
  • Hospital Universitario Miguel Servet

    Zaragoza, 50009

    +34 976 765 624

    Alex Gutiérrez Dalmau

    Recruiting

Other trials in Spain

Australia4 sites, 4 recruiting
  • Princess Alexandra Hospital

    Brisbane, Queensland, 4102

    Recruiting
  • Fiona Stanley Hospital

    Murdoch, Western Australia, 6150

    Recruiting
  • Royal Melbourne Hospital

    Parkville, Victoria, 3050

    Recruiting
  • Westmead Hospital

    Westmead, New South Wales, 2145

    Recruiting

Other trials in Australia

France4 sites, 4 recruiting
  • Centre Hospitalier Universitaire (CHU) de Bordeaux - Hôpital Pellegrin

    Bordeaux, 33000

    +33 5 56 79 55 38

    Lionel Couzi

    Recruiting
  • Centre Hospitalier Universitaire (CHU) de GreNble Alpes - Hôpital Michallon

    La Tronche, 38700

    0033 5 56 79 55 38

    Lionel Rostaing

    Recruiting
  • Hospices Civils de Lyon - Hôpital Édouard Herriot

    Lyon, 69003

    +334 2785 8000

    Oliver Thaunat

    Recruiting
  • Centre Hospitalier Universitaire (CHU) de Toulouse - Hôpital de Rangueil

    Toulouse, 31400

    33 561 323 200

    Nassim Kamar

    Recruiting

Other trials in France

Germany4 sites, 4 recruiting
  • Charité - Universitätsmedizin Berlin

    Berlin, 10117

    49 30 450 514002

    Klemens Budde

    Recruiting
  • Universitaetsklinikum Carl Gustav Carus Dresden

    Dresden, 1307

    0049 351 458 4233

    Christian Hugo

    Recruiting
  • Universitätsklinikum Hamburg-Eppendorf

    Hamburg, 20251

    407410 52240 ext. +49 (0)

    Florian Grahammer

    Recruiting
  • Universitätsklinikum Regensburg

    Regensburg, 93053

    49 (0) 40 7410 52240

    Barnhard Banas

    Recruiting

Other trials in Germany

Brazil3 sites, 3 recruiting
  • Hospital do Rim - Fundação Oswaldo Ramos

    São Paulo, 04038-002

    +55 11 5904-1699

    Lúcio Moura

    Recruiting
  • Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP)

    São Paulo, 05403-900

    11 2661 8089

    David Elias Neto

    Recruiting
  • Hospital de Base da Faculdade de Medicina de São José do Rio Preto

    Vila São José, São José Do Rio Preto, 15090-000

    55(17) 3201-5054

    Maria Alice Baptista

    Recruiting

Other trials in Brazil

Canada3 sites, 3 recruiting
  • Alberta Health Services (AHS) - University of Alberta Hospital

    Edmonton, Alberta, T6G 2R3

    (780) 492-2532

    Sita Gourishankar

    Recruiting
  • Vancouver General Hospital

    Vancouver, British Columbia, V5Z 1M9

    604-875-5950

    James Lan

    Recruiting
  • Providence Health Care - St. Paul's Hospital

    Vancouver, British Columbia, V6Z 1Y6

    604-806-8970

    John Gill

    Recruiting

Other trials in Canada

Argentina2 sites, 2 recruiting
  • Instituto de Trasplante y Alta Complejidad (ITAC)

    Buenos Aires, Ciudad Autónoma de Buenos Aires (caba), 1425

    54 11 48022720

    Carmen Rial

    Recruiting
  • Clínica Privada Vélez Sarsfield

    Córdoba, 5000

    54 35 1208 9560

    Rafael Maldonado

    Recruiting

Other trials in Argentina

Austria1 site, 1 recruiting
  • Medizinische Universität Wien

    Vienna, 1090

    43 69917151086

    Georg Boehmig

    Recruiting

Other trials in Austria

Czechia1 site, 1 recruiting
  • Institut klinicke a experimentalni mediciny (IKEM)

    Prague, 104 21

    420 261 36 5390

    Ondrej Viklicky

    Recruiting

Other trials in Czechia

Switzerland1 site, 1 recruiting
  • Universitätsspital Zürich

    Zurich, 8091

    +41 43 253 7614

    Dusan Harmacek

    Recruiting

Other trials in Switzerland

About this study

Official title: A Double-Blind, Placebo-Controlled, Multicenter, Randomized Phase 2 Trial Evaluating the Efficacy and Safety of Felzartamab in Recipients of Kidney Transplants With Late Isolated Microvascular Inflammation (MVI)

In this study, researchers will learn more about a drug called felzartamab in people who have received a kidney transplant and later developed a condition called microvascular inflammation (MVI). MVI is a type of injury to small blood vessels in the transplanted kidney and may be a sign of rejection by the body. It can lead to serious kidney problems over time.

In many cases, MVI is caused by antibodies that attack the transplanted kidney. But in some people, MVI happens without these antibodies. This type of MVI is called isolated MVI. There are currently no approved treatments for isolated MVI.

Read more

The main goal of the study is to learn about the effect felzartamab has on inflammation in the transplanted kidney. The main question researchers want to answer is:

  • How many participants have no signs of active inflammation in the transplanted kidney after 24 weeks of treatment with felzartamab?

Researchers will also study how felzartamab affects kidney function, immune activity, and overall health. They will monitor safety through kidney biopsies, lab tests, and by recording adverse events throughout the study.

Adverse events are health problems that may or may not be caused by the study drug.

The study will be done in 2 parts as follows:

  • Participants will be randomly assigned to receive either felzartamab or a placebo. A placebo looks like the study drug but contains no real medicine.
  • In Part A, participants will receive their assigned drug for 24 weeks. Neither the researchers nor the participants will know who is receiving felzartamab or placebo.
  • Part B will last another 28 weeks. All participants will receive felzartamab and both participants and researchers will know this.
  • All treatments will be given by intravenous (IV) infusion at the study site.
  • Participants will have kidney biopsies at the start of the study, at Week 24, and at Week 52 to help measure changes in inflammation.
  • Participants will stay in the study for about 1 year.
Read the detailed description

The primary objective of the study is to evaluate the efficacy of felzartamab compared to placebo in kidney transplant recipients in Cohort 1 (Part A). The secondary objectives of the study are to evaluate the efficacy of felzartamab compared to placebo through additional clinical endpoints (Part A), summarize efficacy of felzartamab up to Week 52 in kidney transplant recipients in Cohorts 1 and 2 (Part B); evaluate safety of felzartamab in kidney transplant recipients in Cohorts 1 and 2 (Parts A and B) and to assess the pharmacokinetic (PK) profile and immunogenicity of felzartamab (Parts A and B).

Being tested
Felzartamab, Placebo
Keywords
Kidney Transplant, Kidney Transplant Rejection

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • FelzartamabDrug

    Also called MOR202, MOR03087, TJ202, HIB202, BIIB148

    Administered IV

  • PlaceboDrug

    Administered IV

Study groups in NCT07219043
Study groupRoleWhat they receive
FelzartamabExperimentalParticipants will receive multiple IV doses of felzartamab.
Receives: Drug: Felzartamab
Placebo and FelzartamabPlacebo comparatorParticipants will receive multiple IV doses of placebo followed by multiple doses of IV felzartamab.
Receives: Drug: Felzartamab; Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Part A: Percentage of Participants Who Achieve Biopsy-proven Histologic Resolution (BPHR)

    Measured: Week 24

Secondary outcomes (16)
  1. Part A: Microvascular Inflammation (MVI) Score

    Measured: Week 24

  2. Part A: Percentage of Participants Who Achieve an MVI Score of 0

    Measured: Week 24

  3. Part A: Change from Baseline in Estimated Glomerular Filtration Rate (eGFR)

    Measured: Baseline, Week 24

  4. Part A: Percentage of Participants in Cohort 2 Who Achieve BPHR

    Measured: Week 24

  5. Part B: Percentage of Participants Who Achieve BPHR

    Measured: Weeks 24 and 52

  6. Part B: MVI Score

    Measured: Weeks 24 and 52

  7. Part B: Percentage of Participants Who Achieve an MVI Score of 0

    Measured: Weeks 24 and 52

  8. Part B: Change from Baseline in eGFR

    Measured: Baseline, Weeks 24 and 52

  9. Part B: Time to All-cause Allograft Loss

    Measured: Up to Week 52

  10. Parts A and B: Number of Participants with Adverse Events (AEs)

    Measured: From first dose of study drug up to end of study follow-up (up to week 57)

  11. Parts A and B: Percentage of Participants with T Cell-mediated Rejection (TCMR) by Biopsy

    Measured: Weeks 24 and 52

  12. Parts A and B: Number of Participants with Clinically Significant Laboratory Abnormalities

    Measured: From time of first dose to end of trial visit (Up to Week 52)

  13. Parts A and B: Number of Participants with Clinically Significant Vital Signs Abnormalities

    Measured: From time of first dose to end of trial visit (Up to Week 52)

  14. Parts A and B: Number of Participants with Clinically Significant Electrocardiogram (ECG) Abnormalities

    Measured: From time of first dose to end of trial visit (Up to Week 52)

  15. Parts A and B: Felzartamab Serum Concentration

    Measured: Up to Week 52

  16. Parts A and B: Number of Participants with Anti-drug Antibodies (ADAs) Against Felzartamab

    Measured: Baseline, up to Week 52

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted21 Oct 2025
  2. Study start5 Jan 2026
  3. Primary completion10 Feb 2028 (estimated)
  4. Study completion10 Feb 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
81 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07219043
Sponsor's protocol ID
299AR201
Other IDs
2025-521742-15, 2025
Acronym
TRANSPIRE
Status last verified
Nov 2026
First submitted
17 Oct 2025
Last updated
5 Nov 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: In accordance with Biogen's Clinical Trial Transparency and Data Sharing Policy on https://www.biogentrialtransparency.com/

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Felzartamab in people with Microvascular Inflammation, run by Biogen at 53 sites in 11 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 5 Nov 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 53 sites in United States, Spain, Australia, France, Germany and 6 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact US Biogen Clinical Trial Center (866-633-4636, clinicaltrials@biogen.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Part A: Percentage of Participants Who Achieve Biopsy-proven Histologic Resolution (BPHR) (time frame: Week 24). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Nov 2026.

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