染色体3の完全母性イソディソミーによる自己転帰性グリコゲン貯蔵疾患IV型で生まれた乳児
Sigrid Skovby Olsen1, Anja Ernst2, Pia Sønderby Christensen3
1Department of Clinical Genetics, Aalborg University Hospital, Aalborg, Denmark.
Case reports in genetics
|September 5, 2025
まとめ
単親分裂 (UPD) は,母親から染色体3の2つのコピーを継承したため,希少な遺伝疾患であるグリコゲン貯蔵疾患4型 (GSD IV) を引き起こした. このレポートは,UPDの
科学分野:
- 人間 の 遺伝子
- 分子生物学
- 小児遺伝学
背景:
- 単親分裂 (UPD) は,単親から2つの同性染色体を継承し,潜在的に遺伝的障害を引き起こす.
- 4型グリコゲン貯蔵症 (GSD IV) は,グリコゲン代謝に影響する珍しい自己相性後退性疾患である.
- 希少疾患の遺伝的基盤を特定することは,診断と管理に不可欠です.
研究 の 目的:
- 染色体3の母性ユニパレンタルディソミー (UPD) に起因する第4型グリコゲン貯蔵疾患 (GSD IV) の最初の症例を報告する.
- 稀な遺伝疾患におけるUPDの診断上の課題と影響を強調する.
- 単一の親から発症する同胞性の病原性変異の症例において,UPDを考慮する重要性を強調する.
主な方法:
- 臨床症例説明と 詳細な病歴
- UPDと病原性変異を特定するために,染色体および分子研究を含む遺伝分析.
- UPDとGSD IVに関する既存の文献のレビュー
主要な成果:
- オートソームリセッシブGSDIVと診断された患者は,母性UPD染色体3を患っていることが判明しました.
- GSD IVの病原性変異はホモジゴスで,母性染色体3からのみ発生した.
- これは,UPDとGSD IVを結びつける最初の文書化された事例です.
結論:
- 染色体3の母性UPDは,この疾患の既知の遺伝的メカニズムを拡張して,自己相性リセシブGSDIVにつながる可能性があります.
- 遺伝カウンセリングと総合的な遺伝検査は GSD IVのようなUPDに関連する希少疾患の診断に不可欠です
- UPDの認識は 臨床遺伝学において 誤診を防止し 潜在的父親問題に対処するために不可欠です
関連する概念動画
Inborn Errors of Metabolism
239
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...
239
Glucose Transporters
24.1K
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:
24.1K
Pathophysiology of Diabetes
1.2K
Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
1.2K
Pedigree Analysis
85.1K
Overview
85.1K
Diabetes Mellitus: Type 2 and Gestational
2.9K
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...
2.9K
Transcytosis of IgG
2.9K
Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
2.9K


