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Kidney TransplantGALACTICNCT07551531

GraftAssure Lowering Allograft rejeCTIon by Combination- (GALACTIC) Trial

An observational study of Kidney Transplant, run by Insight Molecular Diagnostics at 1 site in United States.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

The GALACTIC Registry study purpose is to validate the Combination Model-score (CM-score) for increased accuracy in the percentage of the positive predictive value (PPV) of allograft rejection results for the GraftAssure (GraftAssureCore and GraftAssureDx) assay. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Kidney Transplant
How many people
5,000 participants
Where
1 siteUnited States
Study dates
Jun 2026to Jun 2033
How long will I take part?
3 Years
Phase
Observational
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 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: Adult kidney transplant recipients across up to 60 student centers in the United States.

Who may be able to join

  • 18 years of age or older.
  • ≥ 2 weeks post-kidney transplant at the time of first sample collection.
  • Provides legally effective informed consent.
  • Agrees to comply with all study procedures.
  • 18 years of age or older
  • Has a minimum of three clinical evaluations per year post-transplant.

Who cannot join

  • Has received transplanted kidney from their identical twin.
  • Has a history of another previously transplanted organ in situ, other than a prior kidney transplant.
  • Has received an allogenic bone marrow graft or hematopoietic stem cell transplantation (HSCT).
  • Self-reports as pregnant.
  • Has a current malignancy, other than low-grade malignancy.
  • Actively enrolled in another cfDNA assay-based trial.
Show all 11Show fewer
  • In the opinion of the investigator, participation in this study would pose a risk to data integrity or to the participant's safety and welfare.
  • Has received a kidney transplant from their identical twin.
  • Has a history of another previously transplanted organ in situ, excluding previous kidney transplant.
  • Has a current malignancy, other than low-grade malignancy.
  • Self-reported pregnancy during the historical data time period.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Annum Zhara, MSc. contact

1-949-554-4946

azhara@imdxinc.com

Haley Russell contact

hrussell@imdxinc.com

United States1 site
  • Cooperman Barnabas Medical Center

    Livingston, New Jersey, 07039

    Ana Merced Director of Transplant Services, PhD, MSN, RN, BS, CCTC, 973-322-8467, Ana.Merced@rwjbh.org

    Anup Patel, MD

Other trials in United States

About this study

Official title: GraftAssure Lowering Allograft rejeCTIon by Combination- (GALACTIC) Trial: A Multi-Center Registry Study Assessing Transplanted Kidney Status

The GALACTIC Registry study purpose is to validate the Combination Model-score (CM-score) for increased accuracy in the percentage of the positive predictive value (PPV) of allograft rejection results for the GraftAssure (GraftAssureCore and GraftAssureDx) assay. This will also be correlated with the biopsy yield and treatment decisions. The GraftAssure assay is a diagnostic test intended for the quantitative measurement of dd-cfDNA in plasma from kidney transplant recipients. The test is minimally invasive, and is intended to be used in conjunction with standard clinical assessment and other laboratory findings as an aid in the detection of allograft rejection.

Read the detailed description

This is a prospective, multi-center, longitudinal, registry study.

The study will be conducted in two parts:

Part 1: GraftAssureCore assay (Laboratory-Developed Test)

Blood samples will be obtained by the site, or via contracted phlebotomy or laboratory services, and shipped to iMDx for centralized GraftAssure testing. Results will be reported to the study site.

Part 2: GraftAssureDx assay (On-Site Testing at study site)

Sites will be trained to perform on-site GraftAssure testing in-house with iMDx permission, post-FDA authorization.

Keywords
kidney transplant, dd-cfDNA, cell-free DNA, allograft rejection, donor derived cell-free DNA, kidney rejection, rejection
Medical subject headings
Rejection, Psychology

What participants receive

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

Study groups in NCT07551531
Study groupRoleWhat they receive
Kidney transplant recipientsAdult kidney transplant recipients at least 2 weeks post-kidney transplant

What is being measured

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

  1. Detect Rejection

    Detection of rejection using fractional abundance (%) dd-cfDNA, absolute (cp/mL) dd-cfDNA, and a Combination Model-score of both of these values.

    Measured: 7 years

  2. Validate Superiority of Combination Model-score (CM-score)

    Validate superiority of combined use of percent \& cp/mL dd-cfDNA values, defined as Combination Model-score, over individual dd-cfDNA percent and cp/mL values.

    Measured: 7 years

Secondary outcomes (4)
  1. Association of dd-cfDNA levels

    Association of dd-cfDNA levels and graft survival/retained function, retransplant, DSA development, and patient survival.

    Measured: 7 years

  2. Graft survival

    Graft survival

    Measured: 7 years

  3. Biopsy rate and yield

    Measured: 7 years

  4. Time-to-intervention impact

    Lower hospitalization rates, less severe rejection, lower treatment intensity.

    Measured: 7 years

Timeline

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

  1. First posted27 Apr 2026
  2. Study startJun 2026 (estimated)
  3. Primary completionDec 2032 (estimated)
  4. Study completionJun 2033 (estimated)

Resources

More details

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

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
5,000 participants (estimated)
Target duration
3 Years
IDs, dates and publications
ClinicalTrials.gov ID
NCT07551531
Sponsor's protocol ID
GAL-001
Acronym
GALACTIC
Status last verified
Jul 2026
First submitted
15 Apr 2026
Last updated
30 Jul 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided: only IPD used in the results publication

Publications

  • Benning L, Akifova A, Oellerich M, Osmanodja B, Morath C, Beck J, Schuetz A, Bornemann-Kolatzki K, Schrezenmeier EV, Tran TH, Schwenger V, Shipkova M, Wieland E, Schuetz E, Budde K. Improving diagnostic performance of kidney allograft rejection with a model combining relative fraction and absolute copies of donor-derived cell-free DNA-Results from 5 independent cohorts. Am J Transplant. 2026 Jun 10:S1600-6135(26)02586-4. doi: 10.1016/j.ajt.2026.06.004. Online ahead of print.

    PubMed 42269874
  • Huang Y, Farkash E. Protocol Biopsies: Utility and Limitations. Adv Chronic Kidney Dis. 2016 Sep;23(5):326-331. doi: 10.1053/j.ackd.2016.09.002.

    PubMed 27742388
  • Khush K, Hall S, Kao A, Raval N, Dhingra R, Shah P, Bellumkonda L, Ravichandran A, Van Bakel A, Uriel N, Patel S, Pinney S, DePasquale E, Baran DA, Pinney K, Oreschak K, Kobulnik J, Shen L, Teuteberg J. Surveillance with dual noninvasive testing for acute cellular rejection after heart transplantation: Outcomes from the Surveillance HeartCare Outcomes Registry. J Heart Lung Transplant. 2024 Sep;43(9):1409-1421. doi: 10.1016/j.healun.2024.05.003. Epub 2024 May 15.

    PubMed 38759766
  • Halloran PF, Reeve J, Madill-Thomsen KS, Kaur N, Ahmed E, Cantos C, Al Haj Baddar N, Demko Z, Liang N, Swenerton RK, Zimmermann BG, Van Hummelen P, Prewett A, Rabinowitz M, Tabriziani H, Gauthier P, Billings P; Trifecta Investigators*. Combining Donor-derived Cell-free DNA Fraction and Quantity to Detect Kidney Transplant Rejection Using Molecular Diagnoses and Histology as Confirmation. Transplantation. 2022 Dec 1;106(12):2435-2442. doi: 10.1097/TP.0000000000004212. Epub 2022 Nov 22.

    PubMed 35765145
  • Akifova A, Budde K, Choi M, Oellerich M, Beck J, Bornemann-Kolatzki K, Schutz E, Kowald J, Osmanodja B. Donor-Derived Cell-Free DNA in Biopsy-Proven Antibody-Mediated Rejection Versus Recurrent IgA Nephropathy After Kidney Transplantation. Kidney Int Rep. 2023 Jul 21;8(10):2141-2145. doi: 10.1016/j.ekir.2023.07.011. eCollection 2023 Oct. No abstract available.

    PubMed 37849995
  • Oellerich M, Shipkova M, Asendorf T, Walson PD, Schauerte V, Mettenmeyer N, Kabakchiev M, Hasche G, Grone HJ, Friede T, Wieland E, Schwenger V, Schutz E, Beck J. Absolute quantification of donor-derived cell-free DNA as a marker of rejection and graft injury in kidney transplantation: Results from a prospective observational study. Am J Transplant. 2019 Nov;19(11):3087-3099. doi: 10.1111/ajt.15416. Epub 2019 May 28.

    PubMed 31062511
  • Beck J, Bierau S, Balzer S, Andag R, Kanzow P, Schmitz J, Gaedcke J, Moerer O, Slotta JE, Walson P, Kollmar O, Oellerich M, Schutz E. Digital droplet PCR for rapid quantification of donor DNA in the circulation of transplant recipients as a potential universal biomarker of graft injury. Clin Chem. 2013 Dec;59(12):1732-41. doi: 10.1373/clinchem.2013.210328. Epub 2013 Sep 23.

    PubMed 24061615
  • Bu L, Gupta G, Pai A, Anand S, Stites E, Moinuddin I, Bowers V, Jain P, Axelrod DA, Weir MR, Wolf-Doty TK, Zeng J, Tian W, Qu K, Woodward R, Dholakia S, De Golovine A, Bromberg JS, Murad H, Alhamad T. Clinical outcomes from the Assessing Donor-derived cell-free DNA Monitoring Insights of kidney Allografts with Longitudinal surveillance (ADMIRAL) study. Kidney Int. 2022 Apr;101(4):793-803. doi: 10.1016/j.kint.2021.11.034. Epub 2021 Dec 22.

    PubMed 34953773
  • Hysi K, Foster K. (2024) Trends in dd-cfDNA in Kidney Transplant Patients Converted from Tacrolimus to Belatacept for Immunosuppression Maintenance [abstract]. In: American Transplant Congress; 2024 June 1-5; Philadelphia, (PA). NYU Langone Health, New York, NY; Abstract nr C343.

  • Turgut D, Kendi ZK, Handan O, et al. (2020). How Calcineurin Inhibitor Dosage and Blood Trough Levels Affect Kidney Allograft Survival? Transplantation 104(S3):p S437.

  • Farouk SS, Rein JL. The Many Faces of Calcineurin Inhibitor Toxicity-What the FK? Adv Chronic Kidney Dis. 2020 Jan;27(1):56-66. doi: 10.1053/j.ackd.2019.08.006.

    PubMed 32147003
  • Osmanodja B, Akifova A, Oellerich M, Beck J, Bornemann-Kolatzki K, Schutz E, Budde K. Donor-Derived Cell-Free DNA for Kidney Allograft Surveillance after Conversion to Belatacept: Prospective Pilot Study. J Clin Med. 2023 Mar 22;12(6):2437. doi: 10.3390/jcm12062437.

    PubMed 36983437
  • Osmanodja B, Akifova A, Budde K, Oellerich M, Beck J, Bornemann-Kolatzki K, Schutz E, Velden J, Lehmann C, Kruger BM, Bachmann A, Kowald J. Donor-Derived Cell-Free DNA as a Companion Biomarker for AMR Treatment With Daratumumab: Case Series. Transpl Int. 2024 Aug 1;37:13213. doi: 10.3389/ti.2024.13213. eCollection 2024.

    PubMed 39149569
  • Mayer KA, Schrezenmeier E, Diebold M, Halloran PF, Schatzl M, Schranz S, Haindl S, Kasbohm S, Kainz A, Eskandary F, Doberer K, Patel UD, Dudani JS, Regele H, Kozakowski N, Klager J, Boxhammer R, Amann K, Puchhammer-Stockl E, Vietzen H, Beck J, Schutz E, Akifova A, Firbas C, Gilbert HN, Osmanodja B, Halleck F, Jilma B, Budde K, Bohmig GA. A Randomized Phase 2 Trial of Felzartamab in Antibody-Mediated Rejection. N Engl J Med. 2024 Jul 11;391(2):122-132. doi: 10.1056/NEJMoa2400763. Epub 2024 May 25.

    PubMed 38804514
  • Akifova A, Budde K, Amann K, Buettner-Herold M, Choi M, Oellerich M, Beck J, Bornemann-Kolatzki K, Schutz E, Bachmann F, Halleck F, von Hoerschelmann E, Koch N, Schrezenmeier E, Seelow E, Waiser J, Zukunft B, Eckardt KU, Halbritter J, Kettritz R, Del Moral CL, Lachmann N, Stauch D, Niemann M, Schmidt D, Halloran PF, Osmanodja B. Donor-derived cell-free DNA monitoring for early diagnosis of antibody-mediated rejection after kidney transplantation: a randomized trial. Nephrol Dial Transplant. 2025 Jun 30;40(7):1384-1395. doi: 10.1093/ndt/gfae282.

    PubMed 39673311

Questions about this trial

What is this clinical trial studying?

An observational study of Kidney Transplant, run by Insight Molecular Diagnostics at 1 site in United States.

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 6 inclusion and 11 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: opening soon, as of the sponsor's last update on 30 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. 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. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

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 Annum Zhara, MSc. (1-949-554-4946, azhara@imdxinc.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Detect Rejection (time frame: 7 years). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07551531, which also lists 20 linked publications.

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 30 Jul 2026.

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