Cited by 89Adrenal Hormones and DisordersSexual Differentiation and DisordersMetabolism and Genetic Disorders

Varied Clinical Presentations of Seven Patients With Mutations in CYP11A1 Encoding the Cholesterol Side-Chain Cleavage Enzyme, P450scc

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Tee, Meng Kian, Abramsohn, Michal, Loewenthal, Neta, Harris, Mark, Siwach, Sudeep, Kaplinsky, Ana, Markus, Barak, Birk, Ohad +4 more·2013·The Journal of Clinical Endocrinology & Metabolism

Abstract

CONTEXT: The cholesterol side-chain cleavage enzyme P450scc, encoded by CYP11A1, converts cholesterol to pregnenolone to initiate steroidogenesis. P450scc deficiency can disrupt adrenal and gonadal steroidogenesis, resembling congenital lipoid adrenal hyperplasia clinically and hormonally; only 12 such patients have been reported previously. OBJECTIVE: We sought to expand clinical and genetic experience with P450scc deficiency. PATIENTS AND METHODS: We sequenced candidate genes in 7 children with adrenal insufficiency who lacked disordered sexual development. P450scc missense mutations were recreated in the F2 vector, which expresses the fusion protein P450scc-Ferredoxin Reductase-Ferredoxin. COS-1 cells were transfected, production of pregnenolone was assayed, and apparent kinetic parameters were calculated. Previously described P450scc mutants were assayed in parallel. RESULTS: Four of five Bedouin children in one kindred were compound heterozygotes for mutations c.694C>T (Arg232Stop) and c.644T>C (Phe215Ser). Single-nucleotide polymorphism analysis confirmed segregation of these mutations. The fifth kindred member and another Bedouin patient presented in infancy and were homozygous for Arg232Stop. A patient from Fiji presenting in infancy was homozygous for c.358T>C (Arg120Stop). All mutations are novel. As assayed in the F2 fusion protein, P450scc Phe215Ser retained 2.5% of wild-type activity; previously described mutants Leu141Trp and Ala269Val had 2.6% and 12% of wild-type activity, respectively, and Val415Glu and c.835delA lacked detectable activity. CONCLUSIONS: Although P450scc is required to produce placental progesterone required to maintain pregnancy, severe mutations in P450scc are compatible with term gestation; milder P450scc mutations may present later without disordered sexual development. Enlarged adrenals usually distinguish steroidogenic acute regulatory protein deficiency from P450scc deficiency, but only DNA sequencing is definitive.

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Crossref · 10.1210/jc.2012-2828

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  • The pathogenesis of lipoid CAH is explained by a two-hit model: first, loss of StAR leads to the accumulation of intracellular cholesterol and cholesterol esters, and the second hit arises from destruction of the cellular function by the accumulated products.

    “The pathogenesis of lipoid CAH is explained by a two-hit model: first, loss of StAR leads to the accumulation of intracellular cholesterol and cholesterol esters, and the second hit arises from destruction of the cellular function by the accumulated products.48,50,51”

    From Congenital adrenal hyperplasia (2017) · cites this paper as [51]

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Authors
Tee, M. K., Abramsohn, M., Loewenthal, N., Harris, M., Siwach, S., Kaplinsky, A., Markus, B., Birk, O., Sheffield, V. C., Pavari, R., Hershkovitz, E., & Miller, W. L.
Affiliations
  • University of California, San Francisco (US)
  • Ben-Gurion University of the Negev (IL)
  • Mater Children's Hospital (AU)
  • University of Iowa (US)
Corresponding author
Miller, Walter L.
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2013-02
Volume
98
Issue
2
Pages
713-720
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W2029142094
Cited by
89
References
27
Citations by year
2026: 4 · 2025: 2 · 2024: 24 · 2023: 6 · 2022: 5 · 2021: 4 · 2020: 3 · 2019: 4 · 2018: 5 · 2017: 7 · 2016: 6 · 2015: 9 · 2014: 6 · 2013: 3
FWCI
6.29
Type
journal article
Language
en
Open access
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-37922, R01DK037922)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
Keywords
CYP11A1, cholesterol side-chain cleavage enzyme, congenital lipoid adrenal hyperplasia, adrenal insufficiency, steroidogenesis, missense mutations, compound heterozygosity, enzyme activity, pregnancy maintenance
MeSH terms
Adrenal Insufficiency, Animals, Chlorocebus aethiops, Child, Preschool, Cholesterol Side-Chain Cleavage Enzyme, Female, Humans, Infant, Infant, Newborn, Male, Mutation, Pedigree, Phenotype, COS Cells

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