代谢性酸症会导致Fanconi-like综合征,细胞内交通缺陷和近接管管的功能障碍
J Christopher Hennings1, Keerthana S Murthy1, Nicolas Picard2
1Institute of Human Genetics, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany.
Science translational medicine
|February 11, 2026
概括
远距离管酸性 (dRTA) 可能会导致Fanconi类综合征由于近道管的功能障碍. 酸化会损害内溶性体的运输,导致脏损伤,但二碳酸盐疗法可以逆转这些影响.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 远端管酸症 (dRTA) 经常与近端管管功能障碍有关,呈现为Fanconi类综合征.
- 将dRTA与近道管功能障碍联系起来的分子机制在很大程度上是未知的.
- 之前的研究已经确定了ATPase H+运输V0亚单元a4 (Atp6v0a4) 的淘汰赛小鼠,表现出代谢性酸性和近道管功能障碍.
研究的目的:
- 在dRTA的小鼠模型中研究近接管功能障碍的分子基础.
- 探索内溶体贩运和自在dRTA相关损伤中的作用.
- 为了确定纠正代谢酸化对这些细胞过程的影响.
主要方法:
- 利用Atp6v0a4淘汰赛小鼠来建模dRTA和近道管功能障碍.
- 分析了体贩运标记 (Rab7,Lamp1,Ist1) 和脏近端管道中的自标记.
- 评估二碳酸盐治疗对功能和细胞缺陷的影响.
- 诱导野生类型小鼠的酸性病变,并使用人类器官来验证发现.
主要成果:
- Atp6v0a4淘汰赛小鼠显示Rab7减少,Ist1-标记的Lamp1囊泡增加,以及近端管道中的自细胞积累.
- 双碳酸盐治疗逆转了近道管功能障碍和淘汰小鼠的贩运缺陷.
- 野生类型小鼠的酸性挑战模仿了这些贩运缺陷,并导致近端管道损伤.
- 酸性诱导类似的分子变化在人类器官.
结论:
- 在dRTA中发生的代谢酸会损害内分泌体贩运和自,导致近接管管的功能障碍和Fanconi类综合征.
- 双碳酸盐疗法可以改善这些细胞缺陷和损伤.
- 这些发现提供了dRTA和Fanconi类综合征之间的分子联系,可能解释疾病的进展.
更多相关视频
相关概念视频
Diagnosing Acidosis and Alkalosis
1.3K
Diagnosing acid-base imbalances involves systematically analyzing arterial blood samples, focusing on three key measurements: pH, bicarbonate (HCO3−) concentration, and carbon dioxide partial pressure (PCO2). This analysis follows a four-step process that helps identify the imbalance's underlying cause and nature.
First, the pH level is assessed to determine whether the blood pH is normal (7.35–7.45), low (acidosis), or high (alkalosis).
Next, the PCO2 and...
First, the pH level is assessed to determine whether the blood pH is normal (7.35–7.45), low (acidosis), or high (alkalosis).
Next, the PCO2 and...
1.3K
What is Metabolism?
132.4K
Overview
132.4K
Renal Tubule and Collecting Duct
3.6K
The renal tubule is divided into three parts: the proximal convoluted tubule (PCT), the Loop of Henle (LOH), and the distal convoluted tubule (DCT).
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
3.6K
Intracellular Signaling Cascades
53.7K
Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
53.7K
Lumber Defects
562
Lumber defects, which can affect both the appearance and structural integrity of wood, include a variety of growth and manufacturing flaws. Growth defects such as knots and knotholes occur where branches were once attached to the tree trunk, with knotholes forming when these knots fall out. Other natural defects include decay and insect damage, which compromise the wood's strength and durability.
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
562
Factors Influencing Attraction I: Proximity
289
Proximity plays a fundamental role in shaping interpersonal attraction by increasing opportunities for interaction and fostering familiarity. Research consistently demonstrates that individuals are more likely to form social bonds with those who are physically closer to them, whether in residential settings, workplaces, or educational institutions. This effect is largely driven by the increased frequency of encounters, which facilitates the development of friendships and romantic...
289


