一个小说NR5A1突变在一个泰国男孩有46,XY DSD
Suttipong Wacharasindhu1, Chupong Ittiwut2, Rungnapa Ittiwut3,4
1Division of Pediatric Endocrinology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Journal of pediatric genetics
|August 1, 2024
概括
一种新的NR5A1基因变异在泰国婴儿身上引起了46,XY性发育障碍 (DSD). 用的治疗改善了外部生殖器的生长,上腺功能正常,这种变体是从他的母亲那里继承的.
科学领域:
- 遗传学 遗传学 是一个
- 内分泌学 在内分泌学.
- 儿科 儿科 儿科
背景情况:
- 性发育障碍 (DSD) 涵盖了一系列影响性发育的疾病,分为46,XX DSD,46,XY DSD和性染色体 DSD.
- NR5A1基因编码了类固醇生成因子-1,它是上腺和淋巴腺组织发育和类固醇生成的关键调节者.
- NR5A1中的突变是46,XY DSD的已知原因,占病例的10-20%.
研究的目的:
- 为了确定46,XY婴儿模两可的生殖器的遗传原因.
- 描述一种新型NR5A1变种及其对DSD的影响.
- 评估对治疗的治疗反应.
主要方法:
- 整体外体序列 (WES) 跟着桑格序列被用来识别遗传变异.
- 鉴定到的NR5A1变异被分析为家族内遗传模式.
- 荷尔蒙评估包括一个上腺皮质激素 (ACTH) 刺激测试.
- 激素治疗前后对外部生殖器的临床评估.
主要成果:
- 在该患者身上发现了NR5A1基因中的一种新型异合体无意义变异,c.1249C>T (p.Gln417Ter或p.Q417X).
- 这种致病变体是从未受到影响的母亲从母体遗传的.
- 丸激素治疗导致阴茎长度和直径显著增加.
- 在ACTH刺激后,上腺功能保持正常.
结论:
- 一种新的NR5A1变种 (p.Q417X) 被确定为泰国男孩46,XY DSD的致病原体.
- 该变种是从未受影响的母亲继承的,突出显示出可变的表现力或减少的透力.
- 低剂量丸激素治疗有效地促进了这个患者的阴茎生长.
- 这一案例扩大了NR5A1相关的DSD的基因型谱,并强调了基因分析对模两可的生殖器官的重要性.
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
Sex-linked Disorders
101.9K
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
101.9K
Alternative RNA Splicing
21.1K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.1K
The Ratio of X Chromosome to Autosomes
8.5K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.5K
Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
The Y Chromosome Determines Maleness
6.5K
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
6.5K
X and Y Chromosomes
24.3K
Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
24.3K
