hrp0089fc11.5 | Bone, Growth Plate & Mineral Metabolism 2 | ESPE2018

A Recurrent 6-bp Intronic Deletion in NESP55 with Reduced Penetrance in Pseudohypoparathyroidism Type 1b

Li Dong , Hakonarson Hakon , Levine Michael

Background: Pseudohypoparathyroidism type 1b (PHP1b) is caused by epigenetic errors on the maternal GNAS allele at differentially methylated regions (DMRs) associated with exons A/B, XL, and NESP that lead to reduced production of Gαs transcripts most notably in the renal proximal tubule and thyroid follicular cells. Most PHP1b cases appear sporadically, few of which can be explained by paternal uniparental disomy involving chromosome 20q, leading to global methy...

hrp0089fc2.2 | Bone, Growth Plate & Mineral Metabolism 1 | ESPE2018

Whole Genome Sequencing Reveals Novel Intragenic Deletions of GNAS as Causes of Pseudohypoparathyroidism Type 1a

Li Dong , Bupp Caleb , Hakonarson Hakon , Levine Michael

Background: Pseudohypoparathyroidism type 1a (PHP1a) is characterized by Albright hereditary osteodystrophy (AHO) and multi-hormone resistance, most commonly to parathyroid hormone (PTH) and thyroid-stimulating hormone. This rare disorder is caused by inactivating mutations involving exons 1–13 of the imprinted GNAS gene that encodes the alpha-subunit of the stimulatory G protein (Gαs). Due to paternal imprinting of Gαs transcripts, GNAS mutati...

hrp0084fc2.1 | Bone & Mineral Metabolism | ESPE2015

Whole Exome Sequencing Analysis of Patients with Autosomal Recessive Hypophophatemic Rickets Identified Mutations in DMP1, ENPP1 and SLC34A3

Li Dong , Tenenbaum-Rakover Yardena , Tian Lifeng , Hou Cuiping , Kim Cecilia , Hakonarson Hakon , Levine Michael

Background: Hypophosphatemic rickets (HR) is most commonly X-linked or autosomal dominant, but autosomal recessive (AR) forms have been described. ARHR1 (DMP1) and ARHR2 (ENPP1) share identical biochemical characteristics of excessive renal phosphate wasting due to increased circulating levels of the phosphatonin FGF23 and low serum levels of 1,25(OH)2D. By contrast, in hereditary hypophosphatemic rickets with hypercalciuria (HHRH) phosphaturia is ...

hrp0084fc2.2 | Bone & Mineral Metabolism | ESPE2015

Identification of Mutations in TBX1 and AIRE in Isolated Hypoparathyroidism Patients

Li Dong , Schnellbacher Sarah , Tian Lifeng , Hou Cuiping , Kim Cecilia , Hakonarson Hakon , Levine Michael

Background: Hypoparathyroidism may manifest either as an isolated disorder or as a component of a more complex syndrome. Molecular genetic studies indicate that mutations in PTH, CASR, GCM2 and GNA11 are causes of isolated hypoparathyroidism (IH) and mutations in GATA3, TBCE, FAM111A, AIRE and TBX1 are associated with different complex syndromes with hypoparathyroidism.Objec...

hrp0086fc6.2 | Syndromes: Mechanisms and Management | ESPE2016

Whole Exome Sequencing Identifies EPHB4 and PIk3R6 as Causes of Generalized Lymphatic Anomaly

Li Dong , Wenger Tara , Seiler Christoph , March Michael , Tian Lifeng , Kao Charlly , Pandey Rahul , Nguyen Kenny , Chiavacci Rosetta , Sleiman Patrick , Itkin Maxim , Dori Yoav , Hakonarson Hakon

Background: Generalized lymphatic anomaly (GLA) is a rare congenital disorder characterized by aggressive proliferation of dilated lymphatic vessels. The etiology of GLA is poorly understood.Objective and hypotheses: To identify the underlying genetic basis for GLA.Method: Exome sequencing (ES) was performed in two families, including a multigenerational family (family-1) with six affected members. RNA-seq was performed on skin bio...

hrp0086p2-p94 | Adrenal P2 | ESPE2016

11β- Hydroxylase Deficiency due to a Novel Compound Heterozygous Mutation and Literature Review

Wu Wei , Dong Guanping , Li Yun , Wang Jinling

Background: The incidence of 11β-hydroxylase deficiency is quite low in China, less is reported about the gene mutation in Chinese population.Objective and hypotheses: To analyze the clinical features and CYP11B1 gene mutations of a family with 11β-hydroxylase deficiency (11β-OHD) and literature review were also included.Method: Physical examination and laboratory tests were done on a 4 years old girl and gene mutati...

hrp0082p3-d2-887 | Perinatal and Neonatal Endocrinology (1) | ESPE2014

Permanent Neonatal Diabetes Mellitus in China

Huang Ke , Liang Li , Fu Junfen , Dong Guanpin

Introduction: Permanent neonatal diabetes mellitus (PNDM) is a rare disease which is defined as the onset of diabetes before the age of 6 months with persistence through life. Patients with KCNJ11 or ABCC8 gene mutations have the opportunity to switch to oral sulfonylurea therapy. There were limited studies about the genetic analysis and long-term follow-up of PNDM.Case report: We report four cases of this kind of PNDM, including their genetic mutations,...

hrp0092p1-200 | Fat, Metabolism and Obesity (1) | ESPE2019

Ferritin, an Indicator for Inflammation or Iron Storage in Obese Children?

Wu Wei , Yuan Jinna , Yu Yunxian , Shen Yu , Dong Guanping , Huang Ke , Zhang Li , Fu Junfen

Ferritin is a widely used iron storage indicator. At the same time, it is also viewed as an indicator of inflammation. Chronic low-grade inflammation in obese individual, especially in the one with metabolic disorders, related to comorbidities and poor prognosis. Both hyperglycemia and iron overload can induce inflammation and result in vascular endothelial dysfunction. To study the role of ferritin in obese children and its impact on artery and liver, the present study invest...

hrp0089p1-p187 | Growth & Syndromes P1 | ESPE2018

A Novel Deadly Variant in the TP53 Gene Causing Li-Fraumeni Syndrome. The Importance of Clinical Awareness and the Contribution of Molecular Diagnosis in Active Prevention Within Families with Multiple Tumor Incidents at a Young Age

Bothou Christina , Spyridis Georgios P , Papantonatos Dionysios A , Stratakis Constantine A , Papadimitriou Dimitrios T

Background: Li-Fraumeni Syndrome (LFS) is an autosomal dominant hereditary cancer syndrome associated with germline pathogenic variants in in the TP53 gene and high risk of a broad range of early-onset malignancies. The 70-77% of LFS associated tumors are: breast cancer, soft-tissue sarcoma, brain tumor, osteosarcoma and adrenocortical carcinoma. However, ovarian, pancreatic and gastrointestinal track tumors are also LFS-related. The patients with LFS are at risk for a second ...

hrp0094p2-379 | Pituitary, neuroendocrinology and puberty | ESPE2021

An Observational, Retrospective Study to Evaluate Long Term Safety and Effectiveness of Leuprorelin in the Treatment of Central Precocious Puberty

Fu Junfen , Dong Guanping , Li Pin , Gong Yan , Yang Yu , Yang Li , Gu Wei , Yuan Xuewen , Luo Xiaoping , Hou Ling , Zhong Yan , You Cheng , Wang Winston , Guo Ziheng ,

Objectives: To describe safety and effectiveness of high (≥90-180 µg/kg) and low (<90-30 µg/kg) dose leuprorelin in treating central precocious puberty (CPP).Methods: In this observational, retrospective study, effectiveness was evaluated based on regression or no progression of Tanner staging as the primary outcomes. LH, FSH, estradiol or testosterone suppression, and decrease in bone age to chronolo...