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  • Author: Indraneel Banerjee x
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Avinaash Maharaj Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Ruth Kwong Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Jack Williams Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Christopher Smith Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Helen Storr Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Ruth Krone Birmingham Children’s Hospital, Birmingham, UK

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Debora Braslavsky Centro de Investigaciones Endocrinológicas ‘Dr. Cesar Bergadá’ (CEDIE) – CONICET – FEI – División de Endocrinología, Hospital de Niños ‘Ricardo Gutiérrez’, Buenos Aires, Argentina

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Maria Clemente Paediatric Endocrinology, Growth and Development Research Unit, Vall d’Hebron Research Institute (VHIR), Hospital Vall d’Hebron, CIBERER, Instituto de Salud Carlos III, Barcelona, Spain

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Nanik Ram Department of Endocrinology, The Aga Khan University Hospital, Karachi, Pakistan

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Indraneel Banerjee Department of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Semra Çetinkaya Health Sciences University, Dr. Sami Ulus Obstetrics and Gynaecology, Children’s Health and Disease Education and Research Hospital, Ankara, Turkey

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Federica Buonocore Genetics and Genomic Medicine Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, London, UK

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Tülay Güran Department of Paediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey

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John C Achermann Genetics and Genomic Medicine Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, London, UK

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Louise Metherell Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Rathi Prasad Centre for Endocrinology, John Vane Science Centre, Queen Mary University of London, London, UK

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Sphingosine-1-phosphate lyase (SGPL1) insufficiency syndrome (SPLIS) is an autosomal recessive multi-system disorder, which mainly incorporates steroid-resistant nephrotic syndrome and primary adrenal insufficiency. Other variable endocrine manifestations are described. In this study, we aimed to comprehensively annotate the endocrinopathies associated with pathogenic SGPL1 variants and assess for genotype–phenotype correlations by retrospectively reviewing the reports of endocrine disease within our patient cohort and all published cases in the wider literature up to February 2022. Glucocorticoid insufficiency in early childhood is the most common endocrine manifestation affecting 64% of the 50 patients reported with SPLIS, and a third of these individuals have additional mineralocorticoid deficiency. While most individuals also have nephrotic syndrome, SGPL1 variants also account for isolated adrenal insufficiency at presentation. Primary gonadal insufficiency, manifesting with microphallus and cryptorchidism, is reported in less than one-third of affected boys, all with concomitant adrenal disease. Mild primary hypothyroidism affects approximately a third of patients. There is paucity of data on the impact of SGPL1 deficiency on growth, and pubertal development, limited by the early and high mortality rate (approximately 50%). There is no clear genotype–phenotype correlation overall in the syndrome, with variable disease penetrance within individual kindreds. However, with regards to endocrine phenotype, the most prevalent disease variant p.R222Q (affecting 22%) is most consistently associated with isolated glucocorticoid deficiency. To conclude, SPLIS is associated with significant multiple endocrine disorders. While endocrinopathy in the syndrome generally presents in infancy, late-onset disease also occurs. Screening for these is therefore warranted both at diagnosis and through follow-up.

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