Journal of Applied Phycology

, Volume 24, Issue 2, pp 227–235 | Cite as

A new screening for hemagglutinins from Vietnamese marine macroalgae

  • Le Dinh Hung
  • Bui Minh Ly
  • Vo Thi Dieu Trang
  • Ngo Thi Duy Ngoc
  • Le Thi Hoa
  • Phan Thi Hoai Trinh


Aqueous extracts from 42 species of Vietnamese marine macroalgae, including 17 Chlorophyta, 22 Rhodophyta, and three Phaeophyta species, were examined for hemagglutination activity using native and enzyme-treated different animal and human erythrocytes. All extracts agglutinated at least one type of erythrocytes tested. Strong activity was detected in extracts from four Chlorophyta (Caulerpa serulata var. boryana, Caulerpa sertularioides f. longipes, Halimeda velasquezii, and Halimeda discoidea) and two Rhodophyta species (Gelidiella acerosa and Titanophora pulchra) with enzyme-treated rabbit and horse erythrocytes. The hemagglutinins of some active species were examined for sugar-binding specificity, pH, temperature stability, and divalent cation independency using ammonium sulfate precipitates prepared from their extracts. In a hemagglutination–inhibition test with various monosaccharides and glycoproteins, none of the hemagglutinins had affinity for monosaccharides. The activity of the hemagglutinins was inhibited by some glycoproteins tested. The inhibition profiles with glycoproteins were different depending on hemagglutinin species, suggesting the presence of lectins specific for complex N-glycans, high mannose N-glycans or O-glycans. On the other hand, the activities of almost all algal hemagglutinins were stable over a wide range of pH and temperature, and independent of the presence of divalent cations, except Gelidiopsis scoparia hemagglutinin, its activity was dependent on the presence of divalent cations. These results suggest that Vietnamese marine macroalgae may be good sources of useful lectins for many biological applications.


Carbohydrate-binding specificity Hemagglutinins Lectins Stability Survey 



The authors wish to thank Dr. Le Nhu Hau for the collection and identification of algal samples and to Prof. Kanji Hori-Hiroshima University for providing expert technical assistance. This work was supported by the National Foundation for Science and Technology Development, Vietnam (NAFOSTED) and grant-in-aid for basic research from Vietnamese Academy of Science and Technology (VAST).


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Le Dinh Hung
    • 1
  • Bui Minh Ly
    • 1
  • Vo Thi Dieu Trang
    • 1
  • Ngo Thi Duy Ngoc
    • 1
  • Le Thi Hoa
    • 1
  • Phan Thi Hoai Trinh
    • 1
  1. 1.Nhatrang Institute of Technology Research and ApplicationNhatrang CityVietnam

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