Molecular Basis of CYP19A1 Deficiency in a 46,XX Patient With R550W Mutation in POR: Expanding the PORD Phenotype
| Autor: | Mónica Fernández-Cancio, Norio Kagawa, Núria Camats, Maria Natalia Rojas Velazquez, Sameer S Udhane, Shaheena Parween, Sara Benito-Sanz, Laura Audi, Christa E. Flück, Amit V. Pandey, Juan-Pedro López-Siguero |
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| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_specialty 46 XX Disorders of Sex Development Endocrinology Diabetes and Metabolism Clinical Biochemistry 610 Medicine & health Context (language use) Compound heterozygosity medicine.disease_cause PORD Biochemistry Aromatase Endocrinology Internal medicine CYP17A1 congenital adrenal hyperplasia Humans Medicine Congenital adrenal hyperplasia Child CY19A1 Mutation Adrenal Hyperplasia Congenital biology business.industry Virilization Biochemistry (medical) Prognosis medicine.disease POR Pedigree CYP21A2 Phenotype biology.protein Female medicine.symptom business Aromatase deficiency |
| Zdroj: | Parween, Shaheena; Fernández-Cancio, Mónica; Benito-Sanz, Sara; Camats, Núria; Rojas Velazquez, Maria Natalia; López-Siguero, Juan-Pedro; Udhane, Sameer S; Kagawa, Norio; Flück Pandey, Christa Emma; Audí, Laura; Pandey, Amit Vikram (2020). Molecular Basis of CYP19A1 Deficiency in a 46,XX Patient With R550W Mutation in POR: Expanding the PORD Phenotype. The journal of clinical endocrinology and metabolism, 105(4), e1272-e1290. Oxford University Press 10.1210/clinem/dgaa076 |
| ISSN: | 1945-7197 0021-972X |
| Popis: | Context Mutations in cytochrome P450 oxidoreductase (POR) cause a form of congenital adrenal hyperplasia (CAH). We report a novel R550W mutation in POR identified in a 46,XX patient with signs of aromatase deficiency. Objective Analysis of aromatase deficiency from the R550W mutation in POR. Design, setting, and patient Both the child and the mother had signs of virilization. Ultrasound revealed the presence of uterus and ovaries. No defects in CYP19A1 were found, but further analysis with a targeted Disorders of Sexual Development NGS panel (DSDSeq.V1, 111 genes) on a NextSeq (Illumina) platform in Madrid and Barcelona, Spain, revealed compound heterozygous mutations c.73_74delCT/p.L25FfsTer93 and c.1648C > T/p.R550W in POR. Wild-type and R550W POR were produced as recombinant proteins and tested with multiple cytochrome P450 enzymes at University Children’s Hospital, Bern, Switzerland. Main outcome measure and Results POR-R550W showed 41% of the WT activity in cytochrome c and 7.7% activity for reduction of MTT. Assays of CYP19A1 showed a severe loss of activity, and CYP17A1 as well as CYP21A2 activities were also lost by more than 95%. Loss of CYP2C9, CYP2C19, and CYP3A4 activities was observed for the R550W-POR. Predicted adverse effect on aromatase activity as well as a reduction in binding of NADPH was confirmed. Conclusions Pathological effects due to POR-R550W were identified, expanding the knowledge of molecular pathways associated with aromatase deficiency. Screening of the POR gene may provide a diagnosis in CAH without defects in genes for steroid metabolizing enzymes. |
| Databáze: | OpenAIRE |
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