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The modified G6PD deficiency screening test

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Abstract

Glucose-6-phosphate dehydrogenase (G6PD) deficiency, which involves the mutation of the G6PD gene on the X chromosome, is the most common enzyme defect in humans. G6PD produces nicotinamide adenine dinucleotide phosphate (NADPH) for red blood cell protection from oxidative stress. Oxidative stress-induced red blood cell hemolysis in G6PD-deficient patients leads to anemia, jaundice, acute renal failure, and kernicterus in newborns. Currently, the fluorescent spot test (FST) is widely used for G6PD deficiency screening. This test detects NADPH production under UV light. This study purposed to modify the G6PD deficiency screening test based on NADPH production and the ability to detect the results of the color change in the color of the reaction. Blood samples of 60 subjects were collected and screened for G6PD deficiency using FST method. All samples were tested with the modified G6PD screening test and the quantitative assay kit. The results from the modified test showed the color red for normal cases, whereas the color brown indicated G6PD deficiency cases. The cutoff value of G6PD activity detected by the quantitative method was less than 2.9 U/gHb for G6PD deficiency. The precision of this study was 100 %. The results of sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of the modified test were 100 %, 96.7 %, 100 %, and 96.7 %, respectively. The modified G6PD screening test can be used for the screening of G6PD deficiency in newborns, for support through providing more information, and for self-protection from oxidative stress.

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Acknowledgements

This work has been supported by the Graduate Scholarship for Outstanding Students (Grant number 07/2560 and 07/2562) and the Institute of Research and Innovation, Walailak University, under grant number WU_IRG61_18.

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  1. School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, 80161, Thailand

    Rungnapha Krithong, Manit Nuinoon, Suputcha Pramtong, Piyawit Sasuk & Orawan Sarakul

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  1. Rungnapha Krithong
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  2. Manit Nuinoon
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  3. Suputcha Pramtong
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  4. Piyawit Sasuk
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Correspondence to Orawan Sarakul.

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Krithong, R., Nuinoon, M., Pramtong, S. et al. The modified G6PD deficiency screening test. Accred Qual Assur 25, 121–126 (2020). https://doi.org/10.1007/s00769-019-01421-8

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