外皮原减少驱动感官神经元中衰老的选择性方面
Meera M Krishna1,2, Swapnil G Waghmare1,2, Ariel L Franitza2
1Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
Aging cell
|December 28, 2024
概括
与年龄相关的原蛋白下降导致过度的神经元分支和衰老虫的感觉缺陷. 非神经组织的沟通,特别是原,对于神经元健康的跨度至关重要,独立于结构性作用.
科学领域:
- 神经科学是一个神经科学.
- 衰老研究研究 衰老研究
- 分子生物学分子生物学
背景情况:
- 老化神经系统中分子和细胞变化的上游驱动因素尚未得到充分理解.
- 神经衰老涉及复杂的变化,但非神经组织的影响还没有得到充分探索.
研究的目的:
- 为了研究非神经组织在神经衰老中的作用,使用Caenorhabditis elegans PVD感觉神经元模型.
- 确定与年龄相关的神经元变化的上游调节者,重点关注原和内部神经元信号传递.
主要方法:
- 采用了Caenorhabditis elegans中的PVD多模式感觉神经元作为模型系统.
- 研究了基因突变 (dpy-5,col-120) 和过度表达在衰老过程中对树突形态和功能的影响.
- 研究了内部神经元基因rig-3和转录因子daf-16/FOXO在调节神经元衰老中的作用.
主要成果:
- 降低原表达,一个常见的衰老现象,触发PVD神经元的过度树突分支,与自身感知缺陷相关.
- 原基因 (dpy-5,col-120) 的功能丧失诱导了早期出现的过度分支,而成年期特异性的过度表达减轻了这种表型.
- RIG-3在原基因上游起作用,以维持PVD树突稳定,而原的作用取决于DAF-16/FOXO.
结论:
- 与年龄相关的原减少,独立于结构支持,引发神经元衰老,并导致感官缺陷.
- 这项研究揭示了一种新的组织间通讯途径,涉及原和内部神经元 (RIG-3) 在维持神经元健康的过程中.
- 研究结果强调了考虑多组织相互作用的重要性,以了解和解决衰老中选择性神经元脆弱性的问题.
相关概念视频
01:19The Effect of Aging on Tissues
2.1K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
2.1K
00:50Unrenewable Cells
2.3K
In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
2.3K
01:12Renewal of Skin Epidermal Stem Cells
2.5K
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
2.5K
01:26Aging
37
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
37