Assessment of chimerism by next generation sequencing : A comparison to STR/qPCR methods

Copyright © 2024 American Society for Histocompatibility and Immunogenetics. All rights reserved..

Chimerism analysis is used to evaluate patients after allogeneic hematopoietic stem cell transplant (allo-HSCT) for engraftment and minimal measurable residual disease (MRD) monitoring. A combination of short-tandem repeat (STR) and quantitative polymerase chain reaction (qPCR) was required to achieve both sensitivity and accuracy in the patients with various chimerism statuses. In this study, an insertion/deletion-based multiplex chimerism assay by next generation sequencing (NGS) was evaluated using 5 simulated unrelated donor-recipient combinations from 10 volunteers. Median number of informative markers detected was 8 (range = 5 - 11). The limit of quantitation (LoQ) was determined to be 0.1 % recipient. Assay sample number/batch was 10-20 and total assay time was 19-31 h (manual labor = 2.1 h). Additionally, 50 peripheral blood samples from 5 allo-HSCT recipients (related: N = 4; unrelated: N = 1) were tested by NGS and STR/qPCR. Median number of informative markers detected was 7 (range = 4 - 12). Results from both assays demonstrated a strong correlation (Y = 0.9875X + 0.333; R2 = 0.9852), no significant assay bias (difference mean - 0.08), and 100 % concordant detection of percent recipient increase ≥ 0.1 % (indicator of increased relapse risk). NGS-based chimerism assay can support all allo-HSCT for engraftment and MRD monitoring and simplify clinical laboratory workflow compared to STR/qPCR.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - year:2024

Enthalten in:

Human immunology - (2024) vom: 28. März, Seite 110794

Sprache:

Englisch

Beteiligte Personen:

Brow, Darren [VerfasserIn]
Shike, Hiroko [VerfasserIn]
Kendrick, Jasmine [VerfasserIn]
Pettersson, Linnea [VerfasserIn]
Mineishi, Shin [VerfasserIn]
Claxton, David F [VerfasserIn]
Wirk, Baldeep [VerfasserIn]
Cioccio, Joseph [VerfasserIn]
Greiner, Robert J [VerfasserIn]
Viswanatha, David [VerfasserIn]
Kharfan-Dabaja, Mohamed A [VerfasserIn]
Li, Zhuo [VerfasserIn]
Tyler, Jennifer [VerfasserIn]
Elrefaei, Mohamed [VerfasserIn]

Links:

Volltext

Themen:

Allogenic hematopoietic stem cell transplant
Chimerism testing
Journal Article
Measurable residual disease
Next generation sequencing
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Anmerkungen:

Date Revised 29.03.2024

published: Print-Electronic

Citation Status Publisher

doi:

10.1016/j.humimm.2024.110794

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM370429095