一种拼接切换的寡核酸治疗改善了G6PCc.648G>T的小鼠中的1a类型的糖原储存疾病
Kentaro Ito1,2, Go Tajima2,3, Chikako Kamisato1
1Specialty Medicine Research Laboratories I, Daiichi Sankyo Co., Ltd., Tokyo, Japan.
The Journal of clinical investigation
|October 3, 2023
概括
一种新型的寡核酸疗法纠正了1a型 (GSD1a) 糖原储存疾病中的异常G6PC拼接,恢复了葡萄糖-6-酸酶-α活性,并在临床前模型中预防低血糖症.
科学领域:
- 生物化学 生化学
- 遗传学 是一个遗传学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 糖原储存疾病1a型 (GSD1a) 是由葡萄糖-6-酸酶-α (G6Pase-α) 缺乏引起的,导致严重的低血糖和肝脏问题.
- 目前对GSD1a的管理涉及严格的饮食,但并发症仍然存在,像AAV和mRNA这样的新疗法面临挑战.
- G6PC c.648G>T 变种在东亚普遍存在,导致异常的 G6PC 拼接,导致 GSD1a 病理生理学.
研究的目的:
- 开发和评估一种基于寡核酸的治疗方法,针对GSD1a.的G6PC c.648G>T变体.
- 评估拼接切换寡核酸DS-4108b在纠正异常拼接和恢复G6Pase-α功能的有效性.
- 评估DS-4108b在临床前GSD1a小鼠模型中的治疗潜力,耐用性和安全性.
主要方法:
- 生成了一个具有人类G6PCc.648G>T变异的同卵性诺基因的小鼠模型,以模仿GSD1a.
- 给出了拼接切换的寡核酸DS-4108b,以纠正异常的G6PC在肝脏中的拼接.
- 在动物模型中评估了肝脏G6Pase活性,血糖控制,肝脏异常以及长期疗效,药理动力学和耐受性.
主要成果:
- DS-4108b成功地纠正了异常的G6PC拼接,从而恢复了肝脏G6Pase活性.
- 在GSD1a小鼠模型中,治疗预防了低血糖并逆转了各种肝脏异常.
- 一次剂量DS-4108b在小鼠和子中显示了超过12周的持续有效性,具有良好的安全性.
结论:
- 基于Oligonucleotide的DS-4108b治疗为治疗由G6PC c.648G>T变异引起的GSD1a提供了一个有希望的方法.
- 这种疗法有可能提供可持续的,治愈性治疗,并简化疾病管理.
- DS-4108b代表了GSD1a患有这种特定基因突变的患者的潜在新疗法选择.
更多相关视频
相关概念视频
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Alternative RNA Splicing
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...
Satellite Stem Cells and Muscular Dystrophy
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...


