Even though responsible genetic loci and mode of inheritance for the Rieger syndrome have been well established, the mode of inheritance and the genetic basis for SHORT syndrome are still uncertain. The purpose of this paper is to document a familial translocation of t(1;4)(q31.2;q25), in a mother and her son manifesting Rieger syndrome with polycystic ovaries and SHORT syndrome, respectively. It is suggested that these two syndromes may be different expressions of the same gene, PITX2, localized at 4q25. Our patient is the second with the association of Rieger syndrome and polycystic ovaries, and thus this may not be coincidental, moreover insulin resistance-related phenotypes, such as lipodystrophy and polycystic ovaries, can be major component of syndromes with Rieger eye malformation.
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http://dx.doi.org/10.1002/ajmg.a.30206 | DOI Listing |
Elife
January 2025
The University of Cambridge Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Cambridge, United Kingdom.
encodes three regulatory subunits of class IA phosphoinositide 3-kinase (PI3K), each associating with any of three catalytic subunits, namely p110α, p110β, or p110δ. Constitutional mutations cause diseases with a genotype-phenotype relationship not yet fully explained: heterozygous loss-of-function mutations cause SHORT syndrome, featuring insulin resistance and short stature attributed to reduced p110α function, while heterozygous activating mutations cause immunodeficiency, attributed to p110δ activation and known as APDS2. Surprisingly, APDS2 patients do not show features of p110α hyperactivation, but do commonly have SHORT syndrome-like features, suggesting p110α hypofunction.
View Article and Find Full Text PDFZhonghua Nei Ke Za Zhi
January 2025
Department of Endocrinology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou570311, China.
Front Endocrinol (Lausanne)
December 2024
Department of Endocrinology and Metabolism, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China.
Short stature, joint hyperextension, ocular hypotension, Rieger abnormalities, and delayed tooth eruption (SHORT) syndrom is a rare primary autosomal dominant genetic disorder mainly caused by pathogenic loss-of-function variants in the phosphoinositide-3-kinase regulatory subunit 1 (PIK3R1) gene. We report the case of a Chinese adult female patient with SHORT syndrome, carrying a PIK3R1 gene variant (c.1945C > T), who developed abnormal glucose metabolism and severe postprandial insulin resistance over 9 years.
View Article and Find Full Text PDFCell Death Differ
November 2024
Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Kelch repeat and BTB (POZ) domain-containing 2 (KBTBD2) is known for its pivotal role in metabolic regulation, particularly in adipocytes. However, its significance in skeletal development has remained elusive. Here, we uncover a previously unrecognized function of KBTBD2 in bone formation.
View Article and Find Full Text PDFJ Pediatr Endocrinol Metab
December 2024
432720 Imperial College London Diabetes Centre, Abu Dhabi, United Arab Emirates.
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