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Sulfated polysaccharide-rich extract from Navicula incerta: physicochemical characteristics, antioxidant activity, and anti-hemolytic property

  • Received: 09 October 2022 Revised: 23 November 2022 Accepted: 06 December 2022 Published: 23 December 2022
  • A sulfated polysaccharide from Navicula incerta (SPNi) was extracted, and its physicochemical characteristics, antioxidant activity, and anti-hemolytic property were investigated. The polysaccharide yield was 4.8% (SPNi weight/biomass dry weight). Glucose, galactose, mannose, and xylose were the primary sugars. The sulfate content and Mw values were 0.46% and 45 kDa, respectively. The FT-IR spectrum showed characteristic bands at 3276,1079,1255, and 820 cm−1, related to -OH, C-O-C, S=O, and C-O-S stretching vibration. The 1H-NMR analysis revealed signals of anomeric protons, indicating the presence of CH2-O and CH-O groups. SPNi registered ferric-reducing antioxidant power (up to 1.47 µmol TE/g) and 54% anti-radical activity on ABTS+. This polysaccharide registered 90% hemolysis inhibition achieving integrity of the erythrocyte membrane. The results indicate that SPNi could be a candidate for biotechnology applications where antioxidant activity and hemolysis inhibition are required.

    Citation: Ricardo I. González-Vega, Carmen L. Del-Toro-Sánchez, Ramón A. Moreno-Corral, José A. López-Elías, Aline Reyes-Díaz, Norma García-Lagunas, Elizabeth Carvajal-Millán, Diana Fimbres-Olivarría. Sulfated polysaccharide-rich extract from Navicula incerta: physicochemical characteristics, antioxidant activity, and anti-hemolytic property[J]. AIMS Bioengineering, 2022, 9(4): 364-382. doi: 10.3934/bioeng.2022027

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  • A sulfated polysaccharide from Navicula incerta (SPNi) was extracted, and its physicochemical characteristics, antioxidant activity, and anti-hemolytic property were investigated. The polysaccharide yield was 4.8% (SPNi weight/biomass dry weight). Glucose, galactose, mannose, and xylose were the primary sugars. The sulfate content and Mw values were 0.46% and 45 kDa, respectively. The FT-IR spectrum showed characteristic bands at 3276,1079,1255, and 820 cm−1, related to -OH, C-O-C, S=O, and C-O-S stretching vibration. The 1H-NMR analysis revealed signals of anomeric protons, indicating the presence of CH2-O and CH-O groups. SPNi registered ferric-reducing antioxidant power (up to 1.47 µmol TE/g) and 54% anti-radical activity on ABTS+. This polysaccharide registered 90% hemolysis inhibition achieving integrity of the erythrocyte membrane. The results indicate that SPNi could be a candidate for biotechnology applications where antioxidant activity and hemolysis inhibition are required.



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    Acknowledgments



    This research received funding from CONACYT, grant number 319684. The authors are pleased to acknowledge the DICTUS, CIAD, DIPA, and DIPM spectroscopy laboratory of Universidad de Sonora for use of the facilities to characterize the material.

    Conflict of interest



    All authors declare no conflicts of interest in this paper.

    Author contributions



    Ricardo I. González-Vega: Conceptualization, methodology, formal analysis, investigation, writing—review and editing, visualization, supervision. Carmen L. Del-Toro-Sánchez: resources, writing—review and editing. Ramón A. Moreno-Corral: methodology, writing—review and editing. José A. López-Elías: resources, writing—review and editing. Aline Reyes-Díaz: methodology, writing—review and editing. Norma García-Lagunas: formal analysis, writing—review and editing. Elizabeth Carvajal-Millán: Supervision, Project administration, Funding acquisition, Conceptualization, Writing- Reviewing and Editing, Validation. Diana Fimbres-Olivarría: Conceptualization, methodology, investigation, writing—original draft preparation, writing—review and editing, visualization, supervision.

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