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Detecting β E -allele or hemoglobin E (HbE) gene by PCR generally uses DNA prepared from blood leukocytes. However, blood drawing is invasive and prone to injury and infection. The so-called Chelex-plus-heating protocol for DNA extraction from urine sediments was performed in this study. In this protocol, urine sediments were incubated at 37°C with Chelex-100 resin, followed by heating in boiling water for 20 min, and were spun for 1 min to harvest the DNA-containing supernatant. The obtained DNA was subsequently used in amplification refractory mutation system (ARMS)-PCR for detecting β E -allele. The ARMS-PCR results obtained from urine-DNA were compared to those produced by ARMS-PCR using blood-leukocyte DNA. It was found that the Chelex-plus-heating technique successfully released DNA of good quality with sufficient quantity from urine sediments. Twenty microliters of urine having ∼1111 cells/ml was sufficient to provide good-quality DNA for PCR reaction for HbE genotyping by ARMS-PCR. It was concluded that the Chelex-plus-heating technique was suitable for preparing the DNA from urine sediments. Being simple and less costly, this technique should promote effective control of HbE for countries having a limited budget.

Detecting HbE Gene Using DNA Extracted from Urine Sediments by Chelex-plus-Heating Technique