Evidence map›Paper›PMID 34712778›Full record

ArticleTransplantation direct2021

Absolute or Relative Quantification of Donor-derived Cell-free DNA in Kidney Transplant Recipients: Case Series.

Bilgin Osmanodja, Aylin Akifova, Klemens Budde, Mira Choi, Michael Oellerich, Ekkehard Schütz, Julia Beck

Abstract read
In one paragraph

Article in Transplantation direct, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed.

  1. Donor-derived cell-free DNA monitoring for early diagnosis of antibody-mediated rejection after kidney transplantation: a randomized trial.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2025
    Trial
  2. Donor-derived cell-free DNA associated with increased risk of chronic lung allograft dysfunction and mortality: Are absolute levels better than percentage?The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation · 2026
    Observational
  3. Donor-Derived Cell-Free DNA as a Non-Invasive Readout of Activity Across the Rejection Continuum.Transplant international : official journal of the European Society for Organ Transplantation · 2026
    Article
  4. Review
  5. Review
  6. A two-threshold algorithm using donor-derived cell-free DNA fraction and quantity to detect acute rejection after heart transplantation.American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons · 2025
    Article
  7. Biomarkers of Rejection in Kidney Transplantation.American journal of kidney diseases : the official journal of the National Kidney Foundation · 2025
    Review
  8. Article
  9. Observational
  10. Review
  11. Review
  12. Article
  13. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Bilgin OsmanodjaDepartment of Nephrology and Intensive Care, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
Aylin AkifovaDepartment of Nephrology and Intensive Care, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
Klemens BuddeDepartment of Nephrology and Intensive Care, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
Mira ChoiDepartment of Nephrology and Intensive Care, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
Michael OellerichDepartment of Clinical Pharmacology, University Medical Center Göttingen, Göttingen, Germany.
Ekkehard SchützChronix Biomedical GmbH, Göttingen, Germany.
Julia BeckChronix Biomedical GmbH, Göttingen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDonor-derived cell-free DNA (dd-cfDNA) is increasingly recognized as a valuable biomarker for acute transplant injury, with possible indications in the detection of cellular or humoral rejection and the guidance of immunosuppressive therapy. There is an ongoing debate on whether relative or absolute quantification of dd-cfDNA is more reliable for the detection of acute transplant injury.

methodsWe retrospectively reviewed all 22 kidney transplant recipients who underwent dd-cfDNA measurements (percentage and absolute) between April 2020 and April 2021 at our institution. Of these, 9 (41%) showed discrepancies between absolute (cutoff: 50 copies/mL) and relative (cutoff: 0.5%) quantification in at least 1 dd-cfDNA measurement.

resultsWe report on 9 of 22 cases with discrepancies in relative and absolute quantification of dd-cfDNA, which were predominantly late posttransplant patients. We found bacterial and viral infections, as well as low leukocyte count from chronic myeloid leukaemia treatment, to be reasons for variability in total cell-free DNA (cfDNA), leading to inter- and intraindividual variability in relative dd-cfDNA quantification. When correlating dd-cfDNA quantification and biopsy results, as well as clinical course, our data indicate that relying solely on relative dd-cfDNA can lead to false-negative and false-positive results.

conclusionsIn summary, these cases argue that absolute quantification of dd-cfDNA is better suited in patients with underlying conditions affecting total cfDNA levels and suggest using both absolute and relative dd-cfDNA together for higher reliability and interindividual comparability in the clinical setting. Especially for patients with chronic active antibody-mediated rejection, further studies on the use of dd-cfDNA are desirable.

Identifiers

PMID34712778
PMCPMC8547915

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.