Please use this identifier to cite or link to this item: https://repositorio.unifesp.br/handle/11600/36065
Title: Evaluation of 16 SNPs allele-specific to quantify post hSCT chimerism by SYBR green-based qRT-PCR
Authors: Cardoso Almeida, Carlos Arthur [UNIFESP]
Dreyfuss, Juliana Luporini [UNIFESP]
Azevedo-Shimmoto, Marily Maria [UNIFESP]
Figueiredo, Maria Stela [UNIFESP]
Rodrigues de Oliveira, Jose Salvador [UNIFESP]
Universidade Federal de São Paulo (UNIFESP)
Univ Fed Alagoas UFAL
Santa Marcelina Hosp
Issue Date: 1-Mar-2013
Publisher: Bmj Publishing Group
Citation: Journal of Clinical Pathology. London: Bmj Publishing Group, v. 66, n. 3, p. 238-242, 2013.
Abstract: The importance of monitoring post haematopoietic stem cell transplantation (hSCT) chimerism has been defined in numerous publications. Single-nucleotide polymorphisms (SNPs) are molecular markers that vary significantly among different populations. Allied to a very sensible technique, SNP assays seem to be very sensitive (0.001%) when post hSCT chimerism is measured. However, well known SNP frequencies are limited to certain populations, mainly in countries where there is a high level of diversity in its population, therefore restricting their use worldwide. Amplification by SYBR green based quantitative real time PCR of eight pairs of allele-specific SNPs (MLH-1, PECAM-1, ICAM-1, SUR-1, HA-1, rs715405, rs713503, rs2296600) was conducted in 88 patient/donor pairs, who underwent allogeneic myeloablative or non-myeloablative hSCT. One informative allele was detected in at least 42% (n=37) of the samples; 20% (n=18) had at least two informative alleles; 10% (n=9) had at least three informative alleles; 9% (n=8) had more than three informative alleles and 18% (n=16) showed no informative allele at all. Overall, the frequency of informative alleles for these SNPs in the Brazilian population was very low. Consequently, the amount of information attained reached 9% of those expected, being able to discriminate only eight pairs of donor/recipient samples with more than three informative alleles, making them useless for the quantification of chimerism in our routine.
URI: http://repositorio.unifesp.br/handle/11600/36065
ISSN: 0021-9746
Other Identifiers: http://dx.doi.org/10.1136/jclinpath-2012-201224
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