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<p>In this study, we investigated some functional and probiotics features of Lactic Acid Bacteria strains isolated from Algerian fermented cow milk. Antioxidant, hypocholesterolemic properties, as well as the α-amylase inhibitory activity and survival under simulated gastrointestinal conditions were evaluated. Among the twenty-two isolates analyzed, only five demonstrated significant tolerance to gastrointestinal conditions, with survival rates ranging from 32% to 97% at pH 2, and from 63% to 99% and 41% to 98% at 0.3% and 1% bile salt concentrations, respectively.The isolates also exhibited auto-aggregation and adhesion to polystyrene tissue culture plates, as well as co-aggregation with <i>Staphylococcus aureus</i> ATCC 6538 (8 – 44%). Regarding antimicrobial activity, the isolates inhibited <i>Escherichia coli</i> ATCC 8739 and <i>Staphylococcus aureus</i> ATCC 6538. Furthermore, all isolates exhibited antioxidant and α-amylase inhibitory activities with both, intact cells (IC) and cell-free supernatant (CFS). CFS showed significantly higher inhibition than IC, with values ranging from 94% to 99%.</p><p> Finally, the isolates were able to assimilate cholesterol, with assimilation rates ranging from 12% to 58%. Molecular identification confirmed that these strains belong to the <i>Lactiplantibacillus plantarum</i> species. Their strong functional characteristics highlight their potential application in health-promoting and nutritional products.</p>

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In vitro assessment of antioxidant, hypocholesterolemic and alpha-amylase inhibition of Lactiplantibacillus plantarum strains from a fermented Algerian milk

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Ghania Zidi,
  • Samia Hamma-faradji,
  • Nacim Barache,
  • Amel Ait Meddour,
  • Lylia Ouarabi,
  • Walid Zeghbib,
  • Farés Boudjouan,
  • Giuseppe Spano,
  • Djamel Drider

摘要

In this study, we investigated some functional and probiotics features of Lactic Acid Bacteria strains isolated from Algerian fermented cow milk. Antioxidant, hypocholesterolemic properties, as well as the α-amylase inhibitory activity and survival under simulated gastrointestinal conditions were evaluated. Among the twenty-two isolates analyzed, only five demonstrated significant tolerance to gastrointestinal conditions, with survival rates ranging from 32% to 97% at pH 2, and from 63% to 99% and 41% to 98% at 0.3% and 1% bile salt concentrations, respectively.The isolates also exhibited auto-aggregation and adhesion to polystyrene tissue culture plates, as well as co-aggregation with Staphylococcus aureus ATCC 6538 (8 – 44%). Regarding antimicrobial activity, the isolates inhibited Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538. Furthermore, all isolates exhibited antioxidant and α-amylase inhibitory activities with both, intact cells (IC) and cell-free supernatant (CFS). CFS showed significantly higher inhibition than IC, with values ranging from 94% to 99%.

Finally, the isolates were able to assimilate cholesterol, with assimilation rates ranging from 12% to 58%. Molecular identification confirmed that these strains belong to the Lactiplantibacillus plantarum species. Their strong functional characteristics highlight their potential application in health-promoting and nutritional products.