基于质谱的蛋白质学方法用于死后间隔估计:一个系统的审查.
Rakshita Gautam1, Akansha Das1, Sachil Kumar1
1Amity Institute of Forensic Sciences, Amity University, Noida, 201313, Uttar Pradesh, India.
Journal of forensic and legal medicine
|February 13, 2026
概括
基于质谱的蛋白质组学提供了一种通过分析蛋白质降解来估计死后间隔 (PMI) 的敏感方法. 对于常规的法医应用,需要进一步的标准化和验证.
科学领域:
- 法医科学 法医科学 法医科学
- 生物化学 生物化学
- 分析化学 分析化学
背景情况:
- 准确的死后间隔 (PMI) 估计在法医调查中至关重要.
- 传统的PMI方法受到各种因素的影响,限制了其可靠性.
- 基于质谱 (MS) 的蛋白质组学通过分析时间依赖的蛋白质降解提供了一种新的方法.
研究的目的:
- 系统地审查MS为PMI估计的基于MS的蛋白质组技术的最新进展.
- 为了确定可复制的蛋白质生物标志物,表明死后降解.
- 评估这些蛋白质组方法的法医适用性.
主要方法:
- 在PubMed,Scopus和ScienceDirect中进行系统的文献搜索 (2020-2025年).
- 包括使用基于MS的蛋白质组学进行PMI估计的原始研究.
- 不包括评论,非英语文章和重复的文章;独立的数据提取.
主要成果:
- 包括21项研究 (10人,10个动物样本).
- 骨肌肉,骨,肝脏,心脏和牙是分析的常见组织.
- 诸如热粒素,GAPDH,desmin,tubulin和eEF1A2之类的蛋白质显示出可重复的降解模式.
- 使用了各种不同的MS技术 (GC-MS,LC-MS/MS,MALDI-MS).
- 协议的显著变化需要标准化.
结论:
- 基于MS的蛋白质组学为PMI估计提供了一个敏感和客观的方法.
- 几种蛋白质生物标志物显示出潜在的法医实用性.
- 为了更广泛的法医应用,需要标准化,更大的人类验证研究和多蛋白质面板.
相关概念视频
Confidence Interval for Estimating Population Mean
9.0K
A point estimate of the population mean is obtained from a single sample. Such a point estimate does not represent a population well because it needs to account for variability in the population. Single point estimate can also be biased despite the sample being selected randomly. Thus, a point estimate is often unreliable. A confidence interval is needed to reduce this unreliability.
A confidence interval for the mean is a range of values that provides an estimate of the population mean. As the...
A confidence interval for the mean is a range of values that provides an estimate of the population mean. As the...
9.0K
Mass Spectrometry: Overview
9.0K
Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass. One common type of ionization, known as electron ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave behind a...
9.0K
Tandem Mass Spectrometry
2.6K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
2.6K
Mass Spectrometry of Amines
5.4K
In mass spectroscopy, amines undergo fragmentation to give parent ions with odd molecule weights. This observed mass spectrum follows the nitrogen rule; a molecule with an odd number of nitrogen atoms produces a molecular ion with an odd molecular weight. Amines undergo fragmentation through α cleavage, producing nitrogen-containing cations—iminium ions—and alkyl radicals. Mass spectra of aromatic and cyclic aliphatic amines exhibit strong molecular ion peaks, but acyclic...
5.4K
Mass Spectrometry: Isotope Effect
4.4K
Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of a molecule is different depending on the specific isotope of its elements involved. As a result, the mass spectrum of the molecule exhibits peaks from the same fragment at multiple positions. The positions of these mass signals depend on the mass differences between isotopes. Furthermore, the intensity of these signals is dependent on the...
4.4K
Chemical Equilibria: Systematic Approach to Equilibrium Calculations
1.7K
Equilibrium calculations for systems involving multiple equilibria are often complex. For example, to calculate the solubility of a sparingly soluble salt in an aqueous solution in the presence of a common ion, one must consider all the equilibria in this solution. Calculations for these systems can be complicated and tedious, so a systematic approach with a series of steps is often helpful. The process is detailed below.
The first step is to identify all the chemical reactions involved, The...
The first step is to identify all the chemical reactions involved, The...
1.7K


