31P光谱模块 (PSM) 作为一种对代谢状态的测试
Jack V Greiner1,2,3, Tamara I Snogren3, Thomas Glonek3
1Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA.
Biology
|February 26, 2025
概括
-31光谱模量 (PSM) 使用NMR量化细胞代谢健康. 下PSM表明有病或有压力的组织,使其成为一种有价值的诊断工具.
科学领域:
- 生物物理学的生物物理.
- 生物化学 生物化学
- 医学诊断 医学诊断 医学诊断
背景情况:
- -31光谱模量 (PSM) 是生物系统代谢状态的关键指标.
- PSM来自-31核磁共振 (31P NMR) 光谱,反映了有机的代谢物度.
- 高能量的酸盐 (例如,具有无水化键的酸盐) 对于细胞能量至关重要,而低能量的酸盐则有其他作用.
研究的目的:
- 确定PSM作为代谢健康的定量衡量标准的基本原则.
- 为了证明更高的代谢活性与更高的PSM相关.
- 为了证明PSM计算是可行的,即使使用低分辨率的31PNMR光谱和低信号噪声比.
主要方法:
- 从31P NMR光谱计算PSM,通过确定高能和低能酸盐光谱积分的比.
- 将光谱积分分为高能 (0.13 δ至25 δ) 和低能 (10 δ至0.13 δ) 区域.
- 分析正常,病变和应激细胞,组织和器官中的PSM值.
主要成果:
- 在代谢活动和PSM之间观察到直接的相关性;更高的活动产生更高的PSM.
- 与正常样本 (平均1.65) 相比,患病和压力样本的PSM值明显较低 (平均1.231.29).
- PSM计算是稳健的,只需要检测光谱积分曲线,即使在低代谢物度下也可以进行测量.
结论:
- 该PSM作为一个可靠的,定量指数来评估细胞,组织和器官的代谢健康.
- PSM可以作为可计算的数值测定用于静态或动态健康状况监测.
- 使用PSM的光谱扫描分析在生物学和医学上为评估代谢状态和监测压力和疾病状态中的治疗干预开辟了新的途径.
相关概念视频
01:16The Delta-to-Y Circuit
318
In the delta-wye circuit, the source is delta-connected, while the load is in a wye configuration. This means that the phase voltage of the delta-connected source is equal to the line voltage of the wye-connected load. The connection between two-line currents originates from the delta-connected source. The phase difference in the balanced system allows for calculating one line current given the other, utilizing the positive sequence of phases. In the delta-wye system, the phase currents in the...
318
01:23The Thyroid Gland
3.5K
The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
3.5K
01:18The Muscular System
2.8K
The muscular system is essential to the body's overall structure and function, playing a crucial role in movement, stability, and internal processes. It consists of three distinct types of muscle tissue: the skeletal, the smooth, and the cardiac muscles.
2.8K
01:15The Ideal Diode
645
A diode is a semiconductor device that allows current to flow in one direction only, making it a crucial component in electronic circuits for controlling the direction of current flow. An ideal diode is a simplified version of a real diode used to understand how diodes work in circuits. It possesses two terminals: the positive anode and the cathode, which is negative. When a positive voltage is applied to the anode relative to the cathode, the diode is in a forward-biased state, allowing...
645
01:17The Delta-to-Delta Circuit
525
In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.
525
01:42The ADP/ATP Carrier Protein
3.1K
ADP/ATP carrier or AAC protein is the most abundant carrier protein in the inner mitochondrial membrane. It transports large quantities of ADP and ATP, equivalent to the average human body weight, every day. Among other transporters, ACC protein is one of the best-studied members of the mitochondrial carrier protein family. The ADP/ATP carrier protein comprises two transmembrane helices connected to a loop and a single alpha-helix on the matrix side. It switches between two conformational...
3.1K