针对线粒体疾病的多种遗传缺陷,使用单个细菌酸蛋白联酶
Zhijuan Hu1,2,3,4, Junru Yu1,3,4,5, Ziwei Liu1,2,3,4
1Center of Synthetic Biology and Integrated Bioengineering, Westlake University, Hangzhou, Zhejiang, China.
Science advances
|December 3, 2025
概括
科学家们开发了一种新的基因疗法,使用细菌酶同时修复多个代谢缺陷. 这种跨物种的方法为治疗复杂的能量代谢障碍提供了一个有希望的新策略.
科学领域:
- 生物化学 生物化学
- 遗传学 是一个遗传学.
- 线粒体生物学 线粒体生物学
背景情况:
- 由能量代谢缺陷引起的代谢障碍是危及生命的,治疗选择有限.
- 目前的基因疗法通常针对单个遗传缺陷,限制了其对复杂疾病的有效性.
- 线粒体功能障碍是许多代谢障碍的关键特征.
研究的目的:
- 开发一种单基因干预策略,以解决代谢途径中的多种遗传缺陷.
- 研究细菌酸盐蛋白联酶 (LplA) 在拯救线粒体功能障碍中的治疗潜力.
- 在人类细胞和小鼠模型中评估细菌LplA的跨物种疗效和安全性.
主要方法:
- 利用细菌的脂酸蛋白联酶 (LplA来自*Escherichia coli*或LplJ来自*Bacillus subtilis*) 来向人类的脂化途径基因 (*LIPT2*, *LIAS*, *LIPT1*),前体供应 (*MECR*) 和硫插入 (*FDX1*).
- 在人类细胞系和小鼠模型中验证了LplA和LplJ的疗效和安全性.
- 产生LplA敲门小鼠并使用交配策略来挽救Lipt1*敲门小鼠的胚胎死亡率.
主要成果:
- LplA敲门小鼠表现出正常的健康状况和增加的能量消耗.
- 在Lipt1*-/-突变体中,LplA的过度表达挽救了胚胎死亡率,产生了可活的后代.
- 后代的体重,能量消耗,组织形态和生化特征均为正常.
结论:
- 单个细菌基因干预可以有效地纠正人类代谢途径中的多种遗传缺陷.
- 利用细菌和人类生物合成途径之间的进化差异为代谢障碍提供了创新的治疗策略.
- 这种跨物种的方法对治疗复杂的,多基因的代谢性疾病充满希望.
更多相关视频
09:53Author Spotlight: Advancing Techniques and Discoveries in Protein Synthesis and Assembly Through Innovative Mitochondrial Research
Published on: June 7, 2024
1.6K
09:54Lentiviral Vector-mediated Gene Therapy of Hepatocytes Ex Vivo for Autologous Transplantation in Swine
Published on: November 4, 2018
8.5K
相关概念视频
Mitochondrial Protein Sorting
5.6K
Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death. Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
5.6K
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
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
ATP Synthase: Mechanism
16.6K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
16.6K
