2023
DOI: 10.1515/jpem-2023-0337
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A different approach to the evaluation of the genotype-phenotype relationship in biotinidase deficiency: repeated measurement of biotinidase enzyme activity

İlknur Sürücü Kara,
Engin Köse,
Merve Koç Yekedüz
et al.

Abstract: Objectives In the present study, we aimed to evaluate the genotype-phenotype relation in patients with biotinidase enzyme deficiency based on repeated biotinidase enzyme measurements. Methods The hospital file information of patients with biotinidase, enzyme deficiency was assessed retrospectively, and the relationship between the BTD gene mutations analysis results and biotinidase enzyme activity following the first and repe… Show more

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Cited by 6 publications
(2 citation statements)
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“…At our center, the level of biotinidase enzyme is studied using the fluorometric method. In which <0.7 U/L (<10%) was considered a profound deficiency, 0.7-2.1 U/L (10-30%) a partial deficiency, 2.1-5.1 U/L (30-70%) a heterozygous deficiency and>5.1 U/L (>70%) normal activity (14). Biotin treatment was started in patients who have a profound deficiency and partial deficiency for biotinidase activity.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…At our center, the level of biotinidase enzyme is studied using the fluorometric method. In which <0.7 U/L (<10%) was considered a profound deficiency, 0.7-2.1 U/L (10-30%) a partial deficiency, 2.1-5.1 U/L (30-70%) a heterozygous deficiency and>5.1 U/L (>70%) normal activity (14). Biotin treatment was started in patients who have a profound deficiency and partial deficiency for biotinidase activity.…”
Section: Introductionmentioning
confidence: 99%
“…Biotin was started in all of the patients in the present study whose biotinidase levels were lower than normal. The importance of repeated measurements of biotinidase activity and genetic analysis for a final diagnosis has been demonstrated (14). Biotin treatment was started and discontinued only after excluding a BD diagnosis in babies with no biallelic variant in their genetic analysis, and whose repeated measurements of biotinidase activity were within the normal range during follow-up.…”
mentioning
confidence: 99%