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Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
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Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Does polysaccharide quaternization improve biological activity?

Wanessa Sales de Almeida1, Durcilene Alves da Silva2

  • 1Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade Federal do Piauí, Campus Ministro Petrônio Portela, 64049-550 Teresina, PI, Brazil.

International Journal of Biological Macromolecules
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PubMed
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Quaternization enhances natural polysaccharides, improving their biological activity and interaction with negatively charged surfaces. This chemical modification is safe, effectively boosting macromolecule behavior without significant toxicity.

Keywords:
Chemical modificationQuaternary ammoniumToxicity

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Area of Science:

  • Biochemistry
  • Materials Science
  • Biotechnology

Background:

  • Natural polysaccharides possess diverse structures, solubility, and inherent biological activities.
  • Chemical modification can optimize polysaccharide properties and enhance biological functions.
  • Quaternization is a promising strategy for modifying polysaccharides.

Purpose of the Study:

  • To review original articles on polysaccharide quaternization for biological applications.
  • To assess the impact of quaternization on polysaccharide properties and biological activity.
  • To evaluate the safety and toxicity of quaternized polysaccharides.

Main Methods:

  • Bibliographic survey of Scopus, Web of Science, and PubMed databases.
  • Selection of original articles on polysaccharide quaternization.
  • Analysis of studies reporting changes in biological activity and toxicity.

Main Results:

  • Quaternization increases positive charges, enhancing interactions with negatively charged biological structures like microbial cell walls and DNA.
  • Modified polysaccharides exhibited increased biological activity across various applications.
  • Toxicity levels remained unaffected or negligibly affected by the quaternization process in most cases.

Conclusions:

  • Polysaccharide quaternization is a safe and effective method for improving biological behavior.
  • Enhanced interaction with negatively charged surfaces drives increased biological activity.
  • Quaternization offers a valuable strategy for developing advanced polysaccharide-based biomaterials.