Phenolic Rich Fractions from Mycelium and Fruiting Body of Ganoderma lucidum Inhibit Bacterial Pathogens Mediated by Generation of Reactive Oxygen Species and Protein Leakage and Modulate Hypoxic Stress in HEK 293 Cell Line

Summary

This research examined how compounds extracted from the medicinal mushroom Ganoderma lucidum can fight bacteria and protect cells from low-oxygen stress. The scientists found that certain extracts from both the mushroom’s fruiting body and root-like structure had strong antioxidant properties and could kill harmful bacteria by disrupting their cells. The extracts also helped protect kidney cells from damage caused by low oxygen conditions. Impacts on everyday life: – Could lead to new natural antibiotics to fight bacterial infections – May help develop treatments for conditions involving low oxygen in tissues – Demonstrates the potential health benefits of medicinal mushrooms in supplements – Provides scientific support for traditional uses of Ganoderma in Asian medicine – Shows promise for developing natural preservatives and antioxidants

Background

Ganoderma lucidum fungus is widely used in traditional medicine in Asian countries for its numerous medicinal properties including antioxidant, anticancer, antimicrobial, energy enhancing and immunostimulatory effects. These therapeutic effects are attributed to its various chemical constituents including carbohydrates, flavonoids, minerals, phenolics, proteins and steroids.

Objective

To prepare and assess phenolic rich fractions (PRFs) from aqueous extract of Indian variety G. lucidum mycelium and fruiting body for their antioxidant capacity, antibacterial activity, and protective effects against hypoxic stress.

Results

The fractions showed substantial antioxidant potential and contained various flavonoids and nucleobases. They demonstrated significant antibacterial activity by generating ROS and inducing protein leakage in bacterial cells. Several fractions improved cellular viability of HEK 293 cells under hypoxic stress, with GLFea and GLFph showing maximum cytoprotective action by improving viability to 75% and 67.52% respectively.

Conclusion

The aqueous extracts and phenolic rich fractions from G. lucidum displayed appreciable antioxidant and antibacterial effects through ROS generation and protein leakage mechanisms. Some fractions markedly improved cellular viability under hypoxic stress. These results suggest potential therapeutic applications of these natural compounds.
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