晚期诊断部分3β-hydroxysteroid脱酶2型缺乏症 - 一种新的遗传变异的特征
Cagla Margit Øzdemir1, Mette Mølby Nielsen2, Jani Liimatta3,4,5
1Department of Endocrinology, Aarhus University Hospital, Aarhus N, Denmark.
Endocrinology, diabetes & metabolism case reports
|August 1, 2024
概括
由于3β-hydroxysteroid脱酶2型 (3βHSD2) 缺陷导致的非经典先天性上腺增生症 (CAH) 的延迟诊断发生在两个兄弟姐妹身上. 早期全面的类固醇分析和基因检测对于诊断罕见的CAH形式和预防并发症至关重要.
科学领域:
- 内分泌学 在内分泌学.
- 遗传学 是一个遗传学.
- 罕见疾病 罕见疾病
背景情况:
- 先天性上腺增生 (CAH) 包含罕见的遗传性内分泌疾病.
- 非经典的3β-hydroxysteroid脱酶2型 (3βHSD2) 缺乏症往往被低诊断,导致诊断延迟.
- 像疹症和月经不规则等症状可能被错误地归因于其他疾病,如多囊性卵巢综合征 (PCOS).
研究的目的:
- 报告一个病例的延迟诊断的非经典的3βHSD2缺乏在两个兄弟姐妹.
- 强调在差异诊断中考虑罕见的CAH形式的重要性.
- 强调先进的遗传和生物化学测试在诊断类固醇生成障碍中的实用性.
主要方法:
- 两位女性兄弟姐妹的病例报告,症状暗示CAH.
- 最初的诊断工作包括超声波,生物化学测试和对常见的CAH类型 (CYP21A2,CYP11B1) 的基因测试.
- 综合性遗传分析在HSD3B2基因中发现了复合异合体变异体;功能性体外研究证实了功能丧失. 赛纳克测试评估了上腺反应.
主要成果:
- 两个兄弟姐妹都被诊断出患有非经典的3βHSD2缺乏症,呈现为HSD3B2变体的复合异位细胞 (c.558dup, p.
- 鉴定的变异导致功能丧失和部分活动,证实了诊断.
- 尽管出现了最初的症状和住院,但仍有延迟的诊断,这归因于重叠的症状和对罕见的CAH亚型的有限认识.
结论:
- 非经典的3βHSD2缺乏症很可能被低诊断,并且可能出现延迟诊断.
- 早期和全面的类固醇分析和基因检测对于精确诊断罕见的CAH形式至关重要.
- 及时诊断非经典CAH可以预防严重的临床后果,包括不孕症和上腺危机.
更多相关视频
09:34Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
33.7K
09:37Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
Published on: August 15, 2019
9.7K
相关概念视频
Inborn Errors of Metabolism
150
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
150
Pedigree Analysis
84.2K
Overview
84.2K
Lysosomal Hydrolases
3.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K
Diabetes Mellitus: Type 2 and Gestational
2.3K
Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
2.3K
Smooth Endoplasmic Reticulum
5.7K
Smooth endoplasmic reticulum or smooth ER is a sub-organelle with specialized functions in animal cells and plant cells. It is often associated with the tubule morphology of the endoplasmic reticulum.
The ER provides optimal conditions for synthesizing steroid hormones and lipids, such as phospholipids and triglycerides. Traditionally, lipid metabolism was considered to be a smooth ER function. However, there is no direct evidence to prove that rough ER is completely excluded from lipid...
The ER provides optimal conditions for synthesizing steroid hormones and lipids, such as phospholipids and triglycerides. Traditionally, lipid metabolism was considered to be a smooth ER function. However, there is no direct evidence to prove that rough ER is completely excluded from lipid...
5.7K
Glucose Transporters
22.6K
Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
22.6K
