稀なチチン遺伝子変異による肥大型心筋症のオマーン人症例
Kumayl Al-Lawati1, Madan M Maddali2
1Department of Heart Failure and Implantable Devices, National Heart Center, The Royal Hospital, Muscat, Oman.
Sultan Qaboos University medical journal
|December 22, 2025
まとめ
稀なチチン遺伝子変異が18歳の女性に肥大型心筋症を引き起こした。この遺伝性心疾患は、重度の左室肥大、胸痛を引き起こし、植込み型除細動器が必要となった。
科学分野:
- 心臓病学
- 遺伝学
- 医療診断
背景:
- 肥大型心筋症(HCM)は、心筋肥大を特徴とする遺伝性疾患である。
- 心室中隔の肥厚は、HCMの一般的な特徴である。
- 遺伝子変異は、遺伝性心筋症の主な原因である。
研究 の 目的:
- 18歳女性の肥大型心筋症の症例を報告する。
- 患者の心筋症の遺伝的基盤を調査する。
- HCMの若年患者における診断および管理の課題を強調する。
主な方法:
- 左室肥大および閉塞の評価のための経胸壁心エコー検査。
- 心筋瘢痕の評価のための心臓磁気共鳴画像法(MRI)。
- 原因となる変異を同定するための遺伝子検査。
- 臨床症状および薬物療法への反応。
主要な成果:
- 患者は、閉塞性肥大型心筋症を示唆する、労作後の焼けるような胸痛を呈した。
- 心エコー検査では、下外側壁と中隔腔閉塞における最大厚を有する、びまん性の左室肥大が示された。
- MRIは、突然死のリスクを高める著明な心筋瘢痕を示した。
- 遺伝子検査により、稀なチチン遺伝子変異が同定された。
結論:
- 稀なチチン遺伝子変異が、この若年患者の肥大型心筋症の原因であることが同定された。
- 突然死の高リスクのため、積極的な医学的管理およびデバイスの植込み(ICD)が必要であった。
- この症例は、特に若年者におけるHCMの診断および管理における遺伝子検査の重要性を強調している。
関連する概念動画
Cardiomyopathy III: Hypertrophic Cardiomyopathy
362
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
362
Incomplete Dominance
29.6K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
29.6K
Animal Mitochondrial Genetics
8.9K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
8.9K
Translation
154.9K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
154.9K
Translation
17.4K
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
Translation Produces the Building Blocks of Life
Proteins are...
17.4K


