ISSN 1662-4009 (online)

ey0017.5-13 | Advances in Skeletal Biology | ESPEYB17

5.13. Perivascular osteoprogenitors are associated with transcortical channels of long bones

SH Root , NKY Wee , S Novak , CJ Rosen , R Baron , BG Matthews , I Kalajzic

To read the full abstract: Stem Cells, 2020;38(6):769–781.In brief: A novel population of osteoprogenitor cells in proximity to transcortical channels is found to persist during skeletal maturation. These migrate, expand and contribute to bone formation.Commentary: Bone formation and regeneration requires multiple distinct populations of progeni...

ey0017.6-5 | Differences/Disorders of Sex Development: Basic Research | ESPEYB17

6.5. Undifferentiated spermatogonia regulate Cyp26b1 expression through NOTCH signaling and drive germ cell differentiation

PA Parekh , TX Garcia , R Waheeb , V Jain , P Gandhi , ML Meistrich , G Shetty , MC Hofmann

To read the full abstract: FASEB J. 2019, Jul; 33: 8423–35. doi: https://www.ncbi.nlm.nih.gov/pubmed/30991836Retinoic acid (RA) is essential for the regulation of many developmental events including germ cell differentiation. In the developing testis, tight spatiotemporal control of RA levels is maintained by the enzyme CYP26B1, which inactivates RA. CYP26B1 expres...

ey0017.6-8 | Differences/Disorders of Sex Development: Genetics | ESPEYB17

6.8. Pathogenic variants in the DEAH-box RNA helicase DHX37 are a frequent cause of 46,XY gonadal dysgenesis and 46,XY testicular regression syndrome

K McElreavey , A Jorgensen , C Eozenou , T Merel , J Bignon-Topalovic , DS Tan , D Houzelstein , F Buonocore , N Warr , RGG Kay , M Peycelon , JP Siffroi , I Mazen , JC Achermann , Y Shcherbak , J Leger , A Sallai , JC Carel , L Martinerie , R Le Ru , GS Conway , B Mignot , L Van Maldergem , R Bertalan , E Globa , R Brauner , R Jauch , S Nef , A Greenfield , A Bashamboo

To read the full abstract: Genet Med. 2020, Jan; 22: 150-9. doi: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6944638/pdf/41436_2019_Article_606.pdfMassive parallel sequencing of 145 46,XY DSD patients revealed 13 individuals with heterozygous missense pathogenic variants in the RNA helicase DHX37, explaining 11% of cases of 46,XY gonadal d...

ey0017.6-13 | Differences/Disorders of Sex Development: Fertility | ESPEYB17

6.13. Establishing reproductive potential and advances in fertility preservation techniques for XY individuals with differences in sex development

R Islam , S Lane , SA Williams , CM Becker , GS Conway , SM Creighton

To read the full abstract: Clin Endocrinol (Oxf). 2019, Aug; 91: 237–44. doi: https://www.ncbi.nlm.nih.gov/pubmed/31004515Fertility issues in individuals with a DSD has attracted increasing attention over the past decade and are summarized in this and other reviews. The various genetic defects that cause DSD and their underlying mechanism may impair fertility in a variety of ways. I...

ey0017.8-14 | New Concerns | ESPEYB17

8.14. Brain differences in the prefrontal cortex, amygdala, and hippocampus in youth with congenital adrenal hyperplasia

MM Herting , A Azad , R Kim , JM Tyszka , ME Geffner , MS Kim

To read the full abstract: J Clin Endocrinol Metab. 2020; 105(4):1098-111. PMID: 31950148.Classical congenital adrenal hyperplasia (CAH) is characterized by impaired glucocorticoid, and often also mineralocorticoid, secretion and increased adrenal androgen production (1). Given the widespread expression of androgen and glucocorticoid receptors throughout the brain (...

ey0017.8-19 | Reviews | ESPEYB17

8.19. Fixing the broken clock in adrenal disorders: Focus on glucocorticoids and chronotherapy

M Minnetti , V Hasenmajer , R Pofi , MA Venneri , KI Alexandraki , AM Isidori

To read the full abstract: J Endocrinol. 2020:JOE-20-0066.R2. PMID: 32380472.Human physiology and behavior are adapted to daily environmental cycles by means of endogenous circadian clocks. Biological tasks, including cell proliferation, differentiation, energy storage and immune regulation, are preferentially confined to specific periods of the 24-h cycle. This circadian rhythm derives fro...

ey0017.12-9 | Metabolic Syndrome | ESPEYB17

12.9. Variabilities in childhood cardiovascular risk factors and incident diabetes in adulthood: The Bogalusa Heart Study

T Du , C Fernandez , R Barshop , V Fonseca , W Chen , LA Bazzano

To read the full abstract: Diabetes Care. 2019;42(9):1816–23. doi: 10.2337/dc19-0430Short summary: In this longstanding cohort study (n =1718), high intraindividual variability over time in BMI and in HDL-C during childhood, independent of their mean levels, conferred an increased risk of later-life diabetes.Comment: Intraindividual variabil...

ey0017.13-2 | Advocacy, History and Society | ESPEYB17

13.2. The age of paediatrics

SM Sawyer , R McNeil , KL Francis , JZ Matskarofski , GC Patton , ZA Bhutta , DO Esangbedo , JD Klein

To read the full abstract: Lancet Child Adolesc Health 2019; 3: 822–30. doi: 10.1016/S2352-4642(19)30266-4• The upper age limit of paediatric care varies markedly from country to country.• The authors surveyed 1372 paediatricians in 115 countries and found that, based on their personal experience, the upper age limit of pediatric services had increased over the last 20...

ey0016.4-13 | New Paradigms | ESPEYB16

4.13. Growth hormone-Insulin-like growth factor 1 axis hyperactivity on bone fibrous dysplasia in McCune-Albright Syndrome

D Tessaris , AM Boyce , M Zacharin , P Matarazzo , R Lala , L De Sanctis , MT Collins

To read the full abstract: Clin Endocrinol. 2018;89:56–64.McCune Albright syndrome (MAS) is a rare disorder caused by somatic gain-of-function mutations of the GNAS gene [1]. This gene encodes the α-subunit of the Gs protein and its mutations are responsible for persistent stimulation of adenylyl cyclase and dysregulated production of cyclic AMP leading to persistent o...

ey0016.6-6 | New Functions of (Old) Genes | ESPEYB16

6.6. Early-onset complete ovarian failure and lack of puberty in a woman with mutated estrogen receptor [beta] (ESR2)

M Lang-Muritano , P Sproll , S Wyss , A Kolly , R Hurlimann , D Konrad , A Biason-Lauber

J Clin Endocrinol Metab. 2018 Oct 1;103(10):3748–3756.doi: 10.1210/jc.2018-00769. PubMed PMID: 30113650This case report describes a 16 year old girl with 46,XX karyotype, no pubertal development and streak gonads. The girl was 150 cm tall and had closed epiphyses and osteoporosis. Genetic investigation by whole exome sequencing showed a loss-of-function mutation i...