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Withaferin A is a steroidal lactone derived from the medicinal plant Withania somnifera (commonly known as Ashwagandha). The main active constituents of Ashwagandha leaves are alkaloids and steroidal lactones (commonly known as Withanolides). -The main constituents of ashwagandha are withanolides such as withaferin A, alkaloids, steroidal lactones, tropine, and cuscohygrine. Ashwagandha is an herb that may reduce stress, anxiety, and insomnia. *-Ashwagandha is often characterized as an antioxidant. -Some studies suggest that while ashwagandha may protect normal cells from oxidative damage, it can simultaneously stress cancer cells by tipping their redox balance toward cytotoxicity. Pathways: -Induction of Apoptosis and ROS Generation -Hsp90 Inhibition and Proteasomal Degradation Cell culture studies vary widely, typically ranging from low micromolar (e.g., 1–10 µM). In animal models (commonly mice), Withaferin A has been administered in doses ranging from approximately 2 to 10 mg/kg body weight. - General wellness, Ashwagandha supplements are sometimes taken in doses ranging from 300 mg to 600 mg of an extract (often standardized to contain a certain percentage of withanolides) once or twice daily. - 400mg of WS extract was given 3X/day to schizophrenia patients. report#2001. - Ashwagandha Pure 400mg/capsule is available from mcsformulas.com. -Note half-life 4-6 hrs?. BioAv Pathways: - well-recognized for promoting ROS in cancer cells, while no effect(or reduction) on normal cells. - ROS↑ related: MMP↓(ΔΨm), ER Stress↑, UPR↑, GRP78↑, Cyt‑c↑, Caspases↑, DNA damage↑, cl-PARP↑, HSP↓, Prx, - Confusing results about Lowering AntiOxidant defense in Cancer Cells: NRF2↓, TrxR↓**, SOD↓, GSH↓ Catalase↓ HO1↓ GPx↓ - Raises AntiOxidant defense in Normal Cells: ROS↓, NRF2↑, SOD↑, GSH↑, Catalase↑, - lowers Inflammation : NF-kB↓, COX2↓, p38↓, Pro-Inflammatory Cytokines : NLRP3↓, IL-1β↓, TNF-α↓, IL-6↓, IL-8↓ - inhibit Growth/Metastases : TumMeta↓, TumCG↓, EMT↓, MMPs↓, MMP2↓, MMP9↓, TIMP2, uPA↓, VEGF↓, ROCK1↓, NF-κB↓, CXCR4↓, SDF1↓, TGF-β↓, α-SMA↓, ERK↓ - reactivate genes thereby inhibiting cancer cell growth : HDAC↓(combined with sulfor), DNMT1↓, DNMT3A↓, P53↑, HSP↓, Sp proteins↓, TET↑ - cause Cell cycle arrest : TumCCA↑, cyclin E↓, CDK2↓, CDK4↓, - inhibits Migration/Invasion : TumCMig↓, TumCI↓, TNF-α↓, ERK↓, EMT↓, TOP1↓, - inhibits glycolysis /Warburg Effect and ATP depletion : HIF-1α↓, PKM2↓, cMyc↓, GLUT1↓, LDH↓, LDHA↓, HK2↓, OXPHOS↓, GRP78↑, GlucoseCon↓ - inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, Notch↓, PDGF↓, EGFR↓, Integrins↓, - inhibits Cancer Stem Cells : CSC↓, β-catenin↓, sox2↓, - Others: PI3K↓, AKT↓, JAK↓, STAT↓, Wnt↓, β-catenin↓, AMPK, α↓, ERK↓, JNK, - Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, RadioProtective, Others(review target notes), Neuroprotective, Cognitive, Renoprotection, Hepatoprotective, CardioProtective, - Selectivity: Cancer Cells vs Normal Cells |
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Protein expression of ATF, GRP78, and GADD153 which is a hall marker of ER stress. The endoplasmic reticulum (ER) stress signaling pathway plays a crucial role in maintaining cellular homeostasis and responding to various stressors, including those encountered in cancer. When cells experience stress, such as the accumulation of misfolded proteins, they activate a series of signaling pathways collectively known as the unfolded protein response (UPR). The UPR aims to restore normal function by enhancing the protein-folding capacity of the ER, degrading misfolded proteins, and, if the stress is unresolved, triggering apoptosis. The activation of ER stress pathways can contribute to resistance against chemotherapy and targeted therapies. Cancer cells may utilize the UPR to survive treatment-induced stress, making it challenging to achieve effective therapeutic outcomes. -ER stress-associated proteins include: phosphorylation of PERK, eIF2α, ATF4, CHOP and cleaved-caspase 12 |
2003- | Ash,  |   | Withaferin A Induces Cell Death Selectively in Androgen-Independent Prostate Cancer Cells but Not in Normal Fibroblast Cells |
- | in-vitro, | Pca, | PC3 | - | in-vitro, | Pca, | DU145 | - | in-vitro, | Nor, | TIG-1 | - | in-vitro, | PC, | LNCaP |
3160- | Ash,  |   | Withaferin A: A Pleiotropic Anticancer Agent from the Indian Medicinal Plant Withania somnifera (L.) Dunal |
- | Review, | Var, | NA |
3177- | Ash,  |   | Emerging Role of Hypoxia-Inducible Factors (HIFs) in Modulating Autophagy: Perspectives on Cancer Therapy |
- | Review, | Var, | NA |
1360- | Ash,  | immuno,  |   | Withaferin A Increases the Effectiveness of Immune Checkpoint Blocker for the Treatment of Non-Small Cell Lung Cancer |
- | in-vitro, | Lung, | H1650 | - | in-vitro, | Lung, | A549 | - | in-vitro, | CRC, | HCT116 | - | in-vitro, | BC, | MDA-MB-231 | - | in-vivo, | NA, | NA |
1359- | Ash,  |   | Withaferin A Induces ROS-Mediated Paraptosis in Human Breast Cancer Cell-Lines MCF-7 and MDA-MB-231 |
- | in-vitro, | BC, | MCF-7 | - | in-vitro, | BC, | MDA-MB-231 |
- | in-vitro, | Liver, | HUH7 | - | in-vivo, | Liver, | HUH7 |
1373- | Ash,  |   | Endoplasmic reticulum stress mediates withaferin A-induced apoptosis in human renal carcinoma cells |
- | in-vitro, | Kidney, | Caki-1 |
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