一个新的大型删除,包括主要的监管元素,加上SEA删除,导致Hydrops-Fetalis综合征
Ping Liu1, Jieyu Wang2, Hongyu Luo1
1Prenatal Dagnosis Department Ganzhou Maternal and Child Health Hospital, Guangzhou, China.
Hemoglobin
|June 10, 2025
概括
阿尔法环球蛋白调节元件的新型缺失,与阿尔法血症相结合,导致严重的Hb Bart.
科学领域:
- 遗传学 遗传学 是一个
- 血液学 血液学 血液学
- 产前诊断 在产前诊断
背景情况:
- 阿尔法环球蛋白调节元件 (MCS-R) 对于阿尔法环球蛋白合成至关重要.
- 这些元素和α-环球蛋白基因的删除可以导致Hb Bart的胎儿水,一种严重的α-thalassemia形式.
研究的目的:
- 为了调查一个疑似HB巴特的Hydrops fetalis病例.
- 为了确定严重的alpha-thalassemia的遗传原因,在一个胎儿呈现与hydrops fetalis.
主要方法:
- 胎儿带血的电泳.胎儿带血的电泳.
- 下一代测序与有针对性的捕获.
- 多重联结依赖探头放大 (MLPA) 使用自主设计的探头.
主要成果:
- 电泳检测证实87.6%的Hb是巴特的,表明巴特的Hb是胎儿的水.
- 基因分析显示 -SEA删除与主要α-环球蛋白调节元件 (MCS-R2,R1,R3,R4) 的新型大删除相结合.
- 这种新的删除,从端粒延伸到143702-144291 (GRch38/hg18) 之间的断点,也在轻度贫血的父亲和祖父中发现.
结论:
- 这项研究发现了与α-thalassemia相关的MCS-R元素的新型大删除.
- 化合物删除导致MCS删除与alpha0-thalassemia报告的病例中最早出现胎儿.
- 这些发现为有关MCS删除的遗传咨询提供了关键证据.
相关概念视频
Teratogenicity
2.4K
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
2.4K
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
Pleiotropy
40.3K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
40.3K
Genomic Imprinting and Inheritance
34.1K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
34.1K
Lethal Alleles
15.3K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
15.3K


