Journal of Tropical Oceanography >
Physicochemical analysis and evaluation of the antithrombotic activity of different molecular weights of heparin from clam Coelomactra antiquata
Copy editor: YAO Yantao
Received date: 2022-01-26
Revised date: 2022-03-29
Online published: 2022-03-25
Supported by
Guangdong Key Area Research and Development Program Project(2020B1111030004)
National Key Research and Development Program Key Special Project(2019YFD0902005)
Shenzhen Science and Technology Program Project(PT202001-17)
Zhanjiang Science and Technology Program Project(2019A01015)
Guangdong Province High School Science and Technology Innovation Team Project(2021KCXTD021)
Shenzhen Science and Technology Program Project(JCYJ2017081818111335796)
To investigate the physicochemical properties in vivo antithrombotic activity and their effects on the bleeding time of different molecular weights of clam heparinoid, native clam heparinoid G2 (60.25 kDa), and its two different degradation products, DG1 (24.48 kDa) and DG2 (6.75 kDa), were taken as the research objects in this study. The content of glucuronic acid and the sulfate group was respectively determined by the modified sulfuric acid-carbazole method and BaCl2-gel turbidimetric method, the particle size and zeta potential were determined by nanoparticle sizer, and the thermal stability was analyzed by the simultaneous thermal analyzer. Then the antithrombotic activity and the effect on bleeding time were investigated by the mice black tail model and mice broken tail model, respectively. The results showed that as the molecular weight of clam heparinoid decreased, the sulfate content increased, the glucuronic acid content decreased, the initial degradation temperature increased and then decreased, the particle size decreased, and the Zeta potential increased. The moderate degradation product of G2, DG1, has a higher ability to inhibit tail thrombosis with a lower risk of hemorrhage compared to the natural clam heparinoid G2.
CHEN Guanlan , CHEN Jianping , LI Rui , JIA Xuejing , LIU Xiaofei , SONG Bingbing , ZHONG Saiyi . Physicochemical analysis and evaluation of the antithrombotic activity of different molecular weights of heparin from clam Coelomactra antiquata[J]. Journal of Tropical Oceanography, 2023 , 42(1) : 152 -160 . DOI: 10.11978/2022015
表1 不同分子量海蚌类肝素化学组成分析Tab. 1 Chemical composition analysis of clam heparinoid with different molecular weights |
样品名称 | 硫酸基含量/% | 糖醛酸含量/% |
---|---|---|
G2 | 18.07±1.28 | 27.17±1.57 |
DG1 | 24.74±0.64 | 22.38±0.93 |
DG2 | 27.33±2.22 | 15.32±3.23 |
图1 不同分子量海蚌类肝素的粒径分布图Fig. 1 Particle size distribution of different molecular weights clam heparinoid |
表2 不同分子量海蚌类肝素的粒径、PDI及电位分析结果Tab. 2 Particle size, PDI, and potential analysis of different molecular weights clam heparinoid |
样品名称 | 粒径/nm | PDI | Zeta电位/mV |
---|---|---|---|
G2 | 262.3±5.3 | 0.467±0.0218 | -31.8±1.6 |
DG1 | 183.9±6.2 | 0.429±0.0339 | -25.1±1.0 |
DG2 | 152.8±10.6 | 0.444±0.0169 | -17.9±0.6 |
图3 各实验组尾部血栓小鼠脏器指数图中##表示与空白对照组相比差异极显著(P<0.01), *表示与模型组相比差异显著(P<0.05), **表示与模型组相比差异极显著(P<0.01) Fig. 3 Viscera index of mice with tail thrombosis in each experimental group |
表3 实验前后小鼠体质量的变化(n=12)Tab. 3 The changes of mice body weight before and after the experiment (n=12) |
组别 | W0/g | W7/g |
---|---|---|
B | 25.3±3.4 | 32.8±2.5* |
M | 23.8±3.0 | 32.9±2.6* |
Y | 24.6±2.5 | 34.6±3.5* |
G2L | 24.6±3.5 | 33.4±1.9* |
G2M | 25.6±3.1 | 34.0±2.6* |
G2H | 24.5±2.9 | 33.6±1.9* |
DG1L | 24.0±3.0 | 34.8±2.2* |
DG1M | 23.6±2.2 | 35.6±2.7* |
DG1H | 24.4±3.3 | 33.0±2.4* |
DG2L | 24.4±3.5 | 33.6±3.0* |
DG2M | 23.9±3.8 | 32.1±1.8* |
DG2H | 23.9±3.2 | 31.6±3.4* |
注: W0为适应性灌胃7d后小鼠的体重, W7为灌胃样品7d后小鼠的体重; * 表示与W0相比较差异显著(P<0.05) |
图4 造模48h后空白对照组(a、b)与模型组(c、d)的小鼠黑尾照片及其尾部组织病理学检查结果(HE染色, × 40)Fig. 4 Photographs of black tails of mice in the blank control group (a) and the histopathological findings of their tails (HE staining, ×40) (b), and photographs of black tails of mice in the model control group (c) and the histopathological findings of their tails (HE staining, ×40) (d) 48h after carrageenan treatment |
表4 角叉菜胶处理后24h、48h各实验组的小鼠黑尾比率Tab. 4 Blacktail ratio of mice in different treatment groups at 24h, 48h after carrageenan treatment |
组别 | 黑尾比率/% | |
---|---|---|
24h | 48h | |
B | 0±0 | 0±0 |
M | 52.03±5.46## | 57.73±8.89## |
Y | 28.92±0.56** | 33.01±1.61** |
G2L | 48.67±2.78 | 45.39±4.43 |
G2M | 35.01±1.41** | 33.32±2.09** |
G2H | 31.30±3.23** | 30.83±4.34** |
DG1L | 46.91±5.27 | 45.05±3.88 |
DG1M | 36.96±3.19* | 34.31±1.68** |
DG1H | 19.94±5.26** | 18.70±2.82** |
DG2L | 47.82±5.67 | 49.16±4.71 |
DG2M | 47.30±4.70 | 47.25±6.61 |
DG2H | 43.95±6.54 | 45.00±5.42 |
注: 表中##表示与空白对照组相比差异极显著(P<0.01), *表示与模型组相比差异显著(P<0.05), **表示与模型组相比差异极显著(P<0.01) |
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