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Automated Detection of Residual Cells After Sex-mismatched Stem-cell Transplantation - Evidence for Presence of Disease-marker Negative Residual Cells

Overview
Journal Mol Cytogenet
Publisher Biomed Central
Specialty Biochemistry
Date 2009 Jun 2
PMID 19480690
Citations 2
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Abstract

Background: A new chimerism analysis based on automated interphase fluorescence in situ hybridization (FISH) evaluation was established to detect residual cells after allogene sex-mismatched bone marrow or blood stem-cell transplantation.Cells of 58 patients were characterized as disease-associated due to presence of a bcr/abl-gene-fusion or a trisomy 8 and/or a simultaneous hybridization of gonosome-specific centromeric probes. The automatic slide scanning platform Metafer with its module MetaCyte was used to analyse 3,000 cells per sample.

Results: Overall 454 assays of 58 patients were analyzed. 13 of 58 patients showed residual recipient cells at one stage of more than 4% and 12 of 58 showed residual recipient cells less than 4%, respectively. As to be expected, patients of the latter group were associated with a higher survival rate (48 vs. 34 month). In only two of seven patients with disease-marker positive residual cells between 0.1-1.3% a relapse was observed. Besides, disease-marker negative residual cells were found in two patients without relapse at a rate of 2.8% and 3.3%, respectively.

Conclusion: The definite origin and meaning of disease-marker negative residual cells is still unclear. Overall, with the presented automatic chimerism analysis of interphase FISH slides, a sensitive method for detection of disease-marker positive residual cells is on hand.

Citing Articles

Amenorrhoea with XY karyotype postbone marrow transplant.

Tambawala Z, Al Ani K, Abdelgadir E, Alawadi F BMJ Case Rep. 2021; 14(2).

PMID: 33547101 PMC: 7871276. DOI: 10.1136/bcr-2020-239767.


Beyond chimerism analysis: methods for tracking a new generation of cell-based medicines.

Vives J, Casademont-Roca A, Martorell L, Nogues N Bone Marrow Transplant. 2020; 55(7):1229-1239.

PMID: 32024991 DOI: 10.1038/s41409-020-0822-8.

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