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<p>The seaweed <i>Laminaria japonica</i> possesses a wide range of nutritional and medicinal properties, such as antioxidant and hypoglycemic effects. Previous research has demonstrated that fermenting <i>Laminaria japonica</i> with <i>S. cerevisiae</i> and <i>Lactobacillus</i> enhances its bioactivities. In this study, fermented <i>Laminaria japonica</i> underwent ethanol extraction to recover bioactive compounds. The impact of fermented seaweed extracts (FSE) on renal injury in streptozotocin-induced diabetic nephropathy rats was examined. Through UHPLC-MS/MS analysis, 44 compounds were identified in the fermented seaweed extracts, with carbohydrates and organic acids being the main classes. Fermented seaweed extracts significantly reduced streptozotocin-induced hyperglycemia, improved renal function markers (BUN, SCr, and Umalb), and mitigated kidney morphological changes. Specifically, the FSE-H group exhibited a 49% reduction in fasting glucose levels compared to the model group. Additionally, fermented seaweed extracts treatment downregulated both the transcriptional and protein levels of PI3K, Akt, and mTOR, suggesting involvement of the PI3K/AKT/mTOR-regulated pathway. These findings suggest that fermented seaweed extracts have potential as a therapeutic agent or functional ingredient for the treatment of diabetic nephropathy.</p>

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Fermented seaweed extracts ameliorate diabetic nephropathy in streptozotocin-induced diabetic rats via PI3K/AKT/mTOR pathway

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月2日

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  • Mengrui Cai,
  • Guangjian Hou,
  • Shousen Guo,
  • Yongxuan Liu,
  • Chen Zhao,
  • Lin Zhao,
  • Le Su,
  • Kunlun Li,
  • Qiulin Yue,
  • Song Zhang

摘要

The seaweed Laminaria japonica possesses a wide range of nutritional and medicinal properties, such as antioxidant and hypoglycemic effects. Previous research has demonstrated that fermenting Laminaria japonica with S. cerevisiae and Lactobacillus enhances its bioactivities. In this study, fermented Laminaria japonica underwent ethanol extraction to recover bioactive compounds. The impact of fermented seaweed extracts (FSE) on renal injury in streptozotocin-induced diabetic nephropathy rats was examined. Through UHPLC-MS/MS analysis, 44 compounds were identified in the fermented seaweed extracts, with carbohydrates and organic acids being the main classes. Fermented seaweed extracts significantly reduced streptozotocin-induced hyperglycemia, improved renal function markers (BUN, SCr, and Umalb), and mitigated kidney morphological changes. Specifically, the FSE-H group exhibited a 49% reduction in fasting glucose levels compared to the model group. Additionally, fermented seaweed extracts treatment downregulated both the transcriptional and protein levels of PI3K, Akt, and mTOR, suggesting involvement of the PI3K/AKT/mTOR-regulated pathway. These findings suggest that fermented seaweed extracts have potential as a therapeutic agent or functional ingredient for the treatment of diabetic nephropathy.