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University of Birmingham Genetic Disruption of 21 University of Birmingham Genetic disruption of 21-hydroxylase in zebrafish causes interrenal hyperplasia Eachus, Helen; Zaucker, Andreas; Oakes, James A.; Griffin, Aliesha; Weger, Meltem; Güran, Tülay; Taylor, Angela; Harris, Abigail; Greenfield, Andy; Quanson, Jonathan L.; Storbeck, Karl-Heinz; Cunliffe, Vincent T.; Müller, Ferenc; Krone, Nils DOI: 10.1210/en.2017-00549 License: Creative Commons: Attribution (CC BY) Document Version Publisher's PDF, also known as Version of record Citation for published version (Harvard): Eachus, H, Zaucker, A, Oakes, JA, Griffin, A, Weger, M, Güran, T, Taylor, A, Harris, A, Greenfield, A, Quanson, JL, Storbeck, K-H, Cunliffe, VT, Müller, F & Krone, N 2017, 'Genetic disruption of 21-hydroxylase in zebrafish causes interrenal hyperplasia', Endocrinology, vol. 158, no. 12, pp. 4165-4173. https://doi.org/10.1210/en.2017- 00549 Link to publication on Research at Birmingham portal Publisher Rights Statement: Published in Endocrinology on 13/09/2017 https://doi.org/10.1210/en.2017-00549 General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. •Users may freely distribute the URL that is used to identify this publication. •Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. •User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?) •Users may not further distribute the material nor use it for the purposes of commercial gain. Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive. If you believe that this is the case for this document, please contact [email protected] providing details and we will remove access to the work immediately and investigate. Download date: 29. Sep. 2021 RESEARCH ARTICLE Genetic Disruption of 21-Hydroxylase in Zebrafish Causes Interrenal Hyperplasia Downloaded from https://academic.oup.com/endo/article-abstract/158/12/4165/4157544 by University of Birmingham user on 07 February 2019 Helen Eachus,1 Andreas Zaucker,2 James A. Oakes,1,3 Aliesha Griffin,2 Meltem Weger,2 T¨ulay Guran, ¨ 2 Angela Taylor,2 Abigail Harris,4 Andy Greenfield,4 Jonathan L. Quanson,5 Karl-Heinz Storbeck,5 Vincent T. Cunliffe,1 Ferenc Muller, ¨ 6 and Nils Krone1,3 1Department of Biomedical Science, The Bateson Centre, Sheffield S10 2TN, United Kingdom; 2Centre for Endocrinology, Diabetes, and Metabolism, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; 3Academic Unit of Child Health, Department of Oncology and Metabolism, University of Sheffield, Sheffield S10 2TG, United Kingdom; 4Mammalian Genetics Unit, Medical Research Council, Harwell Institute, Oxfordshire OX11 0RD, United Kingdom; 5Department of Biochemistry, Stellenbosch University, Stellenbosch, Matieland 7602, South Africa; and 6Institute of Cancer and Genomic Sciences, University of Birmingham, College of Medical and Dental Sciences, Birmingham B15 2TT, United Kingdom Congenital adrenal hyperplasia is a group of common inherited disorders leading to glucocorticoid deficiency. Most cases are caused by 21-hydroxylase deficiency (21OHD). The systemic consequences of imbalanced steroid hormone biosynthesis due to severe 21OHD remains poorly understood. Therefore, we developed a zebrafish model for 21OHD, which focuses on the impairment of glucocorticoid biosynthesis. A single 21-hydroxylase gene (cyp21a2) is annotated in the zebrafish genome based on sequence homology. Our in silico analysis of the 21-hydroxylase (Cyp21a2) protein sequence suggests a sufficient degree of similarity for the usage of zebrafish cyp21a2 to model aspects of human 21OHD in vivo. We determined the spatiotemporal expression patterns of cyp21a2 by whole-mount in situ hybridization and reverse transcription polymerase chain reaction throughout early development. Early cyp21a2 expression is restricted to the interrenal gland (zebrafish adrenal counterpart) and the brain. To further explore the in vivo consequences of 21OHD we created several cyp21a2 null-allele zebrafish lines by using a transcription activator–like effector nuclease genomic engineering strategy. Homozygous mutant zebrafish larvae showed an upregulation of the hypothalamic–pituitary–interrenal (HPI) axis and interrenal hyperplasia. Fur- thermore, Cyp21a2-deficient larvae had a typical steroid profile, with reduced concentrations of cortisol and increased concentrations of 17-hydroxyprogesterone and 21-deoxycortisol. Affected larvae showed an upregulation of the HPI axis and interrenal hyperplasia. Downregulation of the glucocorticoid-responsive genes pck1 and fkbp5 indicated systemic glucocorticoid deficiency. Our work demonstrates the crucial role of Cyp21a2 in glucocorticoid biosynthesis in zebrafish larvae and establishes an in vivo model allowing studies of systemic consequences of altered steroid hormone synthesis. (Endocrinology 158: 4165–4173, 2017) teroid hormones are key regulators of sex develop- common causes of disorders of sex development in- Sment, behavior, body homeostasis, and metabolism. cluding congenital adrenal hyperplasia (CAH). CAH Deficiencies of steroid hormone synthesis and action are ranks among the most common inherited metabolic ISSN Print 0013-7227 ISSN Online 1945-7170 Abbreviations: 17OHP, 17-hydroxyprogesterone; 21OHD, 21-hydroxylase deficiency; Printed in USA ACTH, adrenocorticotropic hormone; ANOVA, analysis of variance; CAH, congenital This article has been published under the terms of the Creative Commons Attribution adrenal hyperplasia; cDNA, complementary DNA; dpf, days postfertilization; hpf, hours License (CC BY; https://creativecommons.org/licenses/by/4.0/), which permits unrestricted postfertilization; HPI, hypothalamic–pituitary–interrenal; MTBE, methyl tert-butyl ether; use, distribution, and reproduction in any medium, provided the original author and OPT, optical projection tomography; PCR, polymerase chain reaction; qPCR, quantitative source are credited. Copyright for this article is retained by the author(s). polymerase chain reaction; RT-PCR, reverse transcription polymerase chain reaction; RVD, Received 13 June 2017. Accepted 7 September 2017. repeat-variable di-residue; TALEN, transcription activator–like effector nuclease; UPLC- First Published Online 13 September 2017 MS/MS, ultra-performance liquid chromatography–tandem mass spectrometry; VBA, visual background adaptation; WISH, whole-mount RNA in situ hybridization. doi: 10.1210/en.2017-00549 Endocrinology, December 2017, 158(12):4165–4173 https://academic.oup.com/endo 4165 4166 Eachus et al An In Vivo Model of 21-Hydroxylase Deficiency Endocrinology, December 2017, 158(12):4165–4173 endocrine disorders, occurring in ~1 in 10,000 to 1 in Cyp21a2-deficient zebrafish have a number of systemic 15,000 affected individuals (1, 2). It is associated with hallmark features of human 21OHD, including upregula- morbidity and mortality (3, 4) and represents a classic tion of the hypothalamic–pituitary–interrenal (HPI) axis, example of conditions with severe systemic conse- interrenal hyperplasia, pathognomonic steroid hormone quences due to altered steroid hormone synthesis. The profiles, and reduced systemic glucocorticoid-mediated majority of CAH cases are caused by 21-hydroxylase expression of target genes. Thus, we believe that this Downloaded from https://academic.oup.com/endo/article-abstract/158/12/4165/4157544 by University of Birmingham user on 07 February 2019 (CYP21A2) deficiency (21OHD) resulting from inacti- model will not only define crucial steps of the steroido- vating mutations in the CYP21A2 gene. CYP21A2 is a genic pathway in zebrafish but also serve as a model to cytochrome P450 enzyme located in the endoplasmic re- delineate systemic effects of glucocorticoid deficiency ticulum, which in humans catalyzes the conversion of 17- specific to 21OHD. hydroxyprogesterone (17OHP) to 11-deoxycortisol, a cortisol precursor, and the conversion of progesterone Materials and Methods to 11-deoxycorticosterone, a precursor of aldosterone in Zebrafish husbandry humans (2). Disruption of this pathway renders patients Zebrafish were maintained in a recirculating system unable to synthesize cortisol efficiently and results in the (ZebTECTM, Tecniplast®, Kettering, UK, and Sheffield, UK) at overproduction of adrenocorticotropic hormone (ACTH) 28.5°C in a 10:14 dark/light photoperiod. Embryos were ob- by the pituitary because of diminished negative feedback. tained by natural spawning and incubated at 28.5°C in E3 The stimulation of the adrenal cortex by ACTH in turn medium (5 mmol/L NaCl, 0.17 mmol/L KCl, 0.33 mmol/L m leads to overproduction of cortisol precursors, which are CaCl2, 0.33 mmol/L MgSO4) containing 2 g/mL gentamycin. The developmental stages were determined according to hours diverted to the biosynthesis of sex hormones, leading to sex postfertilization
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