温度对人红细胞及血红蛋白结构功能的影响
发布时间:2018-12-08 09:39
【摘要】: 温度作为血红蛋白和红细胞的一个重要变构因子,其微小变化即可引起从血红蛋白的分子结构、浓度、功能以至红细胞的形态、结构、功能的显著改变。本文采用显微激光共焦拉曼散射技术、动态光散射技术、紫外—可见光谱技术以及多维显微图像分析技术等多种手段,从人体可能发生高温的温度特征及持续时间有时会较长的实际情况出发,从形态、结构及功能三个方面对血红蛋白和红细胞随温度的改变所对应的变化情况进行研究测定。本文发现: 1.离体血红蛋白在高温(39℃-41℃)或低温(4℃-30℃)情况下,只要达到一定的作用时间,就会发生团聚。39℃-41℃团聚体的粒径在100nm到200nm间,且随温度的升高与作用时间的延长而增大。 2.离体血红蛋白在39℃-41℃高温作用下,其二级结构、空间结构会发生变化,,主要表现在有序结构明显减少,无规卷曲增加、血红蛋白卟啉环丢失或松散、疏水性氨基酸残基暴露在外,血红蛋白的携氧能力也随加热温度的升高和加热时间的延长呈下降趋势。 3.高温下血红蛋白的团聚及其分子结构与功能的变化是不可逆行为。而低温作用下血红蛋白的团聚是物理团聚,是可逆的过程,且其分子结构以及功能没有发生变化。 4.高温下孵育的红细胞其形态从正常双凹形转变成棘形,且随加热温度的升高与加热时间的延长红细胞的畸变率升高;且胞内血红蛋白分子结构与功能也相应发生了变化。 本文的研究填补了有关温度对红细胞及其血红蛋白结构和功能的影响作用随作用时间的变化关系,对于阐明红细胞及血红蛋白在有关生理、病理状态下的结构与功能的变化,以及其临床表现与有关防治对策都有重要的指导意义。
[Abstract]:Temperature, as an important structural factor of hemoglobin and erythrocyte, can cause significant changes in molecular structure, concentration, function and morphology, structure and function of red blood cells. In this paper, the techniques of confocal Raman scattering, dynamic light scattering, UV-Vis spectroscopy and multi-dimensional microscopic image analysis are used. Based on the temperature characteristics of human body which may occur high temperature and the fact that the duration is longer sometimes, the changes of hemoglobin and erythrocyte with the change of temperature are studied and measured from the aspects of morphology, structure and function. The results showed that: 1. The agglomeration of hemoglobin in vitro occurred at high temperature (39 鈩
本文编号:2368129
[Abstract]:Temperature, as an important structural factor of hemoglobin and erythrocyte, can cause significant changes in molecular structure, concentration, function and morphology, structure and function of red blood cells. In this paper, the techniques of confocal Raman scattering, dynamic light scattering, UV-Vis spectroscopy and multi-dimensional microscopic image analysis are used. Based on the temperature characteristics of human body which may occur high temperature and the fact that the duration is longer sometimes, the changes of hemoglobin and erythrocyte with the change of temperature are studied and measured from the aspects of morphology, structure and function. The results showed that: 1. The agglomeration of hemoglobin in vitro occurred at high temperature (39 鈩
本文编号:2368129
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