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| Usnic Acid Recommended Abbreviation: UA Type: Natural product / lichen secondary metabolite / dibenzofuran derivative Source: Usnic acid is a secondary metabolite produced by several lichen genera, including Usnea, Cladonia, Lecanora, and related species. It occurs naturally as (+)- and (-)-usnic acid enantiomers. Function: Usnic acid exhibits antimicrobial, anti-inflammatory, antioxidant, antiviral, antiparasitic, photoprotective, and experimental anticancer activities. Its biological effects involve mitochondrial function, oxidative stress, apoptosis, inflammatory signaling, and cellular metabolism. Cancer: Usnic acid has demonstrated preclinical anticancer activity in multiple cancer models, including proliferation ↓, tumor-cell viability ↓, apoptosis ↑, mitochondrial dysfunction ↑, and modulation of oxidative-stress and survival pathways. Its anticancer activity remains predominantly experimental, and toxicity may limit systemic therapeutic use. Neuroprotection: Experimental studies indicate antioxidant and neuroprotective activity, including Nrf2-associated cytoprotective responses and protection against oxidative and ischemic neuronal injury. Direct evidence for Alzheimer's disease is not sufficiently established to assign a specific Alzheimer's disease direction. Safety: Usnic acid has a significant hepatotoxicity concern, particularly with systemic or oral exposure at higher doses. Human cases of severe liver injury, including acute liver failure requiring transplantation, have been reported with usnic-acid-containing weight-loss supplements. Mitochondrial dysfunction and oxidative stress are important mechanisms implicated in its hepatotoxicity. |
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| Normal cells grow and divide in a regulated manner through the cell cycle, which consists of phases (G1, S, G2, and M). Cancer cells often bypass these regulatory mechanisms, leading to uncontrolled proliferation. This can result from mutations in genes that control the cell cycle, such as oncogenes (which promote cell division) and tumor suppressor genes (which inhibit cell division). |
| 8159- | UsA, | Usnic acid suppresses cervical cancer cell proliferation by inhibiting PD-L1 expression and enhancing T-lymphocyte tumor-killing activity |
| - | in-vitro, | Cerv, | HeLa |
Query results interpretion may depend on "conditions" listed in the research papers. Such Conditions may include : -low or high Dose -format for product, such as nano of lipid formations -different cell line effects -synergies with other products -if effect was for normal or cancerous cells
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