删除LOXL2会引发关节骨关节炎,而过度表达会保护它免受NF-κB诱导的冠状细胞亡
Rajnikant Dilip Raut1, Chumki Choudhury1, Faiza Ali1
1Translational Dental Medicine, Boston University Henry M. Goldman School of Dental Medicine, Boston, MA, USA.
International journal of oral science
|February 3, 2026
概括
酸氧化酶-Like-2 (LOXL2) 缺乏会通过增加炎症和软骨破坏,使关节骨关节炎 (TMJ-OA) 恶化. 然而,LOXL2治疗可以防止这些TMJ-OA效应.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 整形外科 整形外科 整形外科
背景情况:
- 关节骨关节炎 (TMJ-OA) 是一种普遍的疾病,由于对分子机制的了解不足,治疗选择有限.
- 已知类似氧化-2- (LOXL2) 能保护膝关节软骨,在TMJ-OA模型中是下调的.
研究的目的:
- 研究LOXL2在关节软骨中的作用和分子机制.
- 评估LOXL2对关节骨关节炎进展的影响.
主要方法:
- 在体内使用的Loxl2淘汰赛小鼠 (Acan-Cre;Loxl2flox/flox) 和ex vivo山羊TMJ软骨.
- 分析了基因表达,细胞外矩阵 (ECM) 完整性,线粒体功能和状细胞亡.
主要成果:
- 在小鼠中的Loxl2淘汰赛上调了炎症标志物 (Il1b,Mmp9,Mmp13,Adamts4,Adamts5) 和减少了软骨成分 (aggrecan,proteoglycan).
- 通过NF-κB信号传递,LOXL2治疗抑制了IL-1β诱导的Mmp13表达,维护了线粒体功能,并通过NF-κB信号传递减少了质细胞亡.
- LOXL2缺乏症加剧TMJ-OA,其特征是软骨退化,线粒体功能障碍,亡和炎症.
结论:
- LOXL2在关节软骨中起着保护作用,缓解了骨关节炎的进展.
- 向LOXL2可能通过减少炎症,ECM降解和冠状细胞亡来提供管理TMJ-OA的治疗策略.
相关概念视频
Apoptosis
15.1K
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size...
15.1K
NF-κB-dependent Signaling Pathway
10.1K
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
NF-κB-dependent Signaling Mechanism
The...
10.1K
Protection of Alcohols
8.1K
This lesson delves into the concept of protection and deprotection of a functional group fundamental to synthetic organic chemistry. These phenomena are explained in the context of aliphatic and aromatic alcohols.
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
8.1K
Zones of Protection
808
In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
808
Radial System Protection
445
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
445
Protecting Self-Esteem
213
Self-esteem, a central component of psychological well-being, is actively maintained through various cognitive and behavioral strategies. Individuals employ specific mechanisms to preserve a positive self-concept and mitigate threats to their self-worth, particularly in contexts involving social evaluation or personal feedback. Four primary techniques are commonly used to sustain self-esteem.Manipulating AppraisalsOne prominent strategy involves manipulating appraisals from others. Individuals...
213


