lysinuric蛋白质不耐受:在一种具有新型病原体变异的复合异构体中,异常临床表现
José R Pascual López1, Wilfred Wu1, Laura Konczal1
1Center for Human Genetics, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.
Biochemistry and biophysics reports
|November 5, 2025
概括
lysinuric蛋白质不耐受,一种氨基酸疾病,导致儿童患有严重的超氨血症. 治疗包括吸剂,饮食变化和补充剂,导致症状缓解和水平正常化.
科学领域:
- 生物化学 生化学
- 遗传学 是一个遗传学.
- 儿科 儿科 儿科
背景情况:
- lysinuric蛋白不耐受 (LPI) 是一种罕见的遗传疾病,影响氨基酸运输.
- 它会导致偶发性高氨血,特别是在摄入蛋白质后.
- LPI可能会导致严重的发育失败和神经症状.
研究的目的:
- 报告一个10岁男孩的病例,由于LPI而导致严重的成长失败.
- 详细介绍这个患者的高氨血的诊断过程和管理.
- 为了突出LPI的遗传确认.
主要方法:
- 临床表现是严重的成长失败和昏昏欲睡.
- 实验室调查包括氨水平,肝功能测试,血氨基酸和尿液有机酸.
- 用静脉注射液体,脂质内,氨基清除剂 (基酸/酸),L-氨酸的治疗,以及饮食的改变.
- 在SLC7A7基因中检测致病变体的分子测试.
主要成果:
- 患者呈现出明显升高的氨水平 (高达374μmol/L) 和轻微的膜炎.
- 血氨基酸显示高氨酸和氨酸,与阿尔金因减少.
- 尿液中高酸和SLC7A7的致病变体证实了LPI的诊断.
- 治疗导致超氨血症的缓解和谷氨胺水平的正常化.
结论:
- 早期诊断和综合管理,包括吸器和营养支持,对LPI患者至关重要.
- 通过SLC7A7变异的遗传确认巩固了诊断.
- 这一案例强调了在儿童中识别LPI的重要性,这些儿童的发育不良和高氨血症.
更多相关视频
相关概念视频
Overview of Protein Metabolism
3.6K
Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
3.6K
Lysosomal Hydrolases
4.4K
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,...
4.4K
Inborn Errors of Metabolism
690
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...
690
Lethal Alleles
17.7K
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...
17.7K
Pleiotropy
43.1K
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,...
43.1K
Cystic Fibrosis: Pathogenesis
698
Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
698


