Journal of Tropical Oceanography ›› 2023, Vol. 42 ›› Issue (1): 152-160.doi: 10.11978/2022015CSTR: 32234.14.2022015

• Exploitation of Marine Resources • Previous Articles     Next Articles

Physicochemical analysis and evaluation of the antithrombotic activity of different molecular weights of heparin from clam Coelomactra antiquata

CHEN Guanlan1(), CHEN Jianping1, LI Rui1, JIA Xuejing1, LIU Xiaofei1, SONG Bingbing1, ZHONG Saiyi1,2,3()   

  1. 1. Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood (College of Food Science and Technology, Guangdong Ocean University), Zhanjiang 524008, China
    2. Shenzhen Research Institute, Guangdong Ocean University, Shenzhen 518108, China
    3. Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
  • Received:2022-01-26 Revised:2022-03-29 Online:2023-01-10 Published:2022-03-25
  • Contact: ZHONG Saiyi. email: zsylxc@126.com
  • 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)

Abstract:

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.

Key words: clam heparinoid, physicochemical analysis, antithrombotic activity, bleeding time