不同分子量海蚌类肝素理化性质分析及抗血栓活性评价
陈观兰(1994—), 女, 广东省惠州市人, 硕士研究生, 从事食品科学与工程。email: |
Copy editor: 姚衍桃
收稿日期: 2022-01-26
修回日期: 2022-03-29
网络出版日期: 2022-03-25
基金资助
广东省重点领域研发计划项目(2020B1111030004)
国家重点研发计划重点专项(2019YFD0902005)
深圳市科技计划项目(JCYJ20170818111335796)
深圳市科技计划项目(PT202001-17)
湛江市科技计划项目(2019A01015)
广东省高校科技创新团队项目(2021KCXTD021)
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)
为探究不同分子量海蚌类肝素的理化性质、体内抗血栓活性及对出血时间的影响, 本文以海蚌类肝素G2(60.25kDa) 及其 2 种不同分子量的降解产物DG1(24.48kDa)、DG2(6.75kDa) 为研究对象, 首先采用改良的硫酸-咔唑法和BaCl2-gel 比浊法测定糖醛酸及硫酸基的含量, 利用纳米粒径仪测定粒径、Zeta电位, 并同步利用热分析仪分析热稳定性; 然后通过小鼠黑尾模型和小鼠断尾模型分别研究抗血栓活性及对出血时间的影响。研究结果表明, 随着分子量的降低, 海蚌类肝素硫酸基含量升高, 糖醛酸含量降低, 初始降解温度先升高后降低, 粒径降低, Zeta 电位升高。相对于海蚌类肝素G2, 其适度降解产物DG1具有更高的抑制尾部血栓形成的能力, 同时具有较低的出血风险。
陈观兰 , 陈建平 , 李瑞 , 贾学静 , 刘晓菲 , 宋兵兵 , 钟赛意 . 不同分子量海蚌类肝素理化性质分析及抗血栓活性评价[J]. 热带海洋学报, 2023 , 42(1) : 152 -160 . DOI: 10.11978/2022015
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.
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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