Multiplex STR panel for assessment of chimerism following hematopoietic stem cell transplantation (HSCT)

Wui Chuen Chia, Tze Sean Khoo, S Fadilah S. Abdul Wahid, Noor Farisah Abdul Razak, Hafiza Alauddin, Raja Zahratul Azma Raja Sabudin, Ainoon Othman, Roshida Hassan, Noor Hamidah Hussin

Research output: Contribution to journalArticle

Abstract

Short tandem repeat (STR) analysis is used in chimerism monitoring after allogeneic hematopoietic stem cell transplantation (HSCT) for patients with various hematologic malignancies. Commercial forensic STR kits often contain loci with huge differences in power of discrimination (PD) across populations, causing some loci to be less informative for chimerism analysis in certain populations. This study aimed to construct a new STR multiplex panel with highly informative loci for efficient chimerism analysis. Thirteen STR markers which exhibit high PD (> 0.9) in at least 80% of 50 populations globally were selected to form a new panel and used in STR analysis of 253 Malaysian subjects. Cumulative power of discrimination (CPD) and combined power of exclusion (CPE) were determined from 253 Malaysian individuals. Loci informativity was assessed and compared to the commercial AmpFLSTR Identifiler PCR Amplification kit in 14 donor–recipient pairs. The new panel had detected 202 unique alleles including five novel alleles from the 253 individuals with high CPD and CPE (> 0.99999999999999999 and > 0.999999997 respectively). All loci from the new panel in the donor–recipient pair analysis showed higher than 50% informativity, while five loci from the commercial kit demonstrated lower than 50% informativity. Four loci from the new panel ranked the highest informativity. A sequenced allelic ladder which consists of 202 unique alleles from the 253 subjects was also developed to ensure accurate allele designation. The new 13-loci STR panel, thus, could serve as an additional powerful, accurate, and highly informative panel for chimerism analysis for HSCT patients.

Original languageEnglish
JournalAnnals of Hematology
DOIs
Publication statusPublished - 1 Jan 2019

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Chimerism
Hematopoietic Stem Cell Transplantation
Microsatellite Repeats
Alleles
Population
Hematologic Neoplasms
Polymerase Chain Reaction

Keywords

  • Chimerism
  • Hematopoietic stem cell transplantation (HSCT)
  • Microsatellite
  • Multiplex PCR
  • Polymerase chain reaction (PCR)
  • Short tandem repeats (STR)

ASJC Scopus subject areas

  • Hematology

Cite this

Multiplex STR panel for assessment of chimerism following hematopoietic stem cell transplantation (HSCT). / Chia, Wui Chuen; Khoo, Tze Sean; S. Abdul Wahid, S Fadilah; Razak, Noor Farisah Abdul; Alauddin, Hafiza; Raja Sabudin, Raja Zahratul Azma; Othman, Ainoon; Hassan, Roshida; Hussin, Noor Hamidah.

In: Annals of Hematology, 01.01.2019.

Research output: Contribution to journalArticle

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