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Piperlongumine (also called Piplartine), an alkaloid from long pepper fruit -Piperlongumine is a bioactive alkaloid derived from the long pepper (Piper longum) – Piperlongumine has been shown to selectively increase ROS levels in cancer cells. -NLRP3 inhibitor? -TrxR inhibitor (major antioxidant system) to increase ROS in cancer cells -ic50 cancer cells maybe 2-10uM, normal cells maybe exceeding 20uM. Available from mcsformulas.com -(Long Pepper, 500mg/Capsule)- 1 capsule 3 times daily with food -Piperlongumine Pro Liposomal, 40 mg-take 1 capsule daily with plenty of water, after a meal -Note half-life 30–60 minutes BioAv poor aqueous solubility and bioavailability Pathways: - induce ROS production in cancer cells likely at any dose. Effect on normal cells is inconclusive. - ROS↑ related: MMP↓(ΔΨm), ER Stress↑, UPR↑, Cyt‑c↑, Caspases↑, DNA damage↑, cl-PARP↑, Prx, - Lowers some AntiOxidant markers/ defense in Cancer Cells: but mostly raises NRF2 (raises antiO defense), TrxR↓(*important), GSH↓ Catalase↓ HO1↓ GPx↓ - Very little indication of raising AntiOxidant defense in Normal Cells: GSH↑, - lowers Inflammation : NF-kB↓, COX2↓, conversely p38↑, Pro-Inflammatory Cytokines : NLRP3↓, IL-1β↓, TNF-α↓, IL-6↓, IL-8↓ - inhibit Growth/Metastases : TumMeta↓, TumCG↓, EMT↓, MMP2↓, MMP9↓, VEGF↓, NF-κB↓, CXCR4↓, ERK↓ - reactivate genes thereby inhibiting cancer cell growth : HDAC↓(few reports), DNMT1↓, DNMT3A↓, EZH2↓, P53↑, HSP↓, Sp proteins↓, - cause Cell cycle arrest : TumCCA↑, cyclin D1↓, CDK2↓, CDK4↓, CDK6↓, - inhibits Migration/Invasion : TumCMig↓, TumCI↓, ERK↓, EMT↓, - small indication of inhibiting glycolysis : HIF-1α↓, cMyc↓, LDH↓, HK2↓, - inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, EGFR↓, - Others: PI3K↓, AKT↓, JAK↓, STAT↓, β-catenin↓, ERK↓, JNK, - Synergies: chemo-sensitization, RadioSensitizer, Others(review target notes), Neuroprotective, Cognitive, Hepatoprotective, CardioProtective, - Selectivity: Cancer Cells vs Normal Cells |
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TrxR is an enzyme that reduces Trx, allowing it to perform its reducing functions. It has been shown to have a role in cancer cell metabolism and survival. TrxR is overexpressed in various types of cancer, including breast, lung, colon, and prostate cancer. - Part of the thioredoxin system, which regulates reactive oxygen species (ROS). - TrxR is a major antioxidant systems that maintains the intracellular redox homeostasis. - Inhibition causes an increase in ROS. - TrxR is often upregulated in cancer cells to help manage increased oxidative stress, it is seen as a potential therapeutic target. Inhibiting TrxR may result in increased ROS in cancer cells, pushing them toward apoptosis. - TrxR is a selenoprotein—meaning it incorporates the trace element selenium in the form of the amino acid selenocysteine. TrxR inhibitors: -Piperlongumine -Withania somnifera (Ashwagandha) -Parthenolide -EGCG -Curcumin -Myricetin -Gambogic Acid |
1951- | PL,  |   | Piperlongumine Analogs Promote A549 Cell Apoptosis through Enhancing ROS Generation |
- | in-vitro, | Lung, | A549 |
1946- | PL,  | PI,  |   | Piperlonguminine and Piperine Analogues as TrxR Inhibitors that Promote ROS and Autophagy and Regulate p38 and Akt/mTOR Signaling |
- | in-vitro, | Liver, | NA |
1949- | PL,  |   | Design, synthesis, and biological evaluation of a novel indoleamine 2,3-dioxigenase 1 (IDO1) and thioredoxin reductase (TrxR) dual inhibitor |
- | in-vitro, | CRC, | HCT116 | - | in-vitro, | Cerv, | HeLa |
1952- | PL,  | 5-FU,  |   | Piperlongumine induces ROS accumulation to reverse resistance of 5-FU in human colorectal cancer via targeting TrxR |
- | in-vivo, | CRC, | HCT8 |
1953- | PL,  |   | Designing piperlongumine-directed anticancer agents by an electrophilicity-based prooxidant strategy: A mechanistic investigation |
- | in-vitro, | Lung, | A549 | - | in-vitro, | Nor, | WI38 |
2649- | PL,  |   | Oxidative Stress Inducers in Cancer Therapy: Preclinical and Clinical Evidence |
- | Review, | Var, | NA |
2942- | PL,  |   | Piperlongumine increases sensitivity of colorectal cancer cells to radiation: Involvement of ROS production via dual inhibition of glutathione and thioredoxin systems |
- | in-vitro, | CRC, | CT26 | - | in-vitro, | CRC, | DLD1 | - | in-vivo, | CRC, | CT26 |
2946- | PL,  |   | Piperlongumine, a potent anticancer phytotherapeutic: Perspectives on contemporary status and future possibilities as an anticancer agent |
- | Review, | Var, | NA |
2948- | PL,  |   | The promising potential of piperlongumine as an emerging therapeutics for cancer |
- | Review, | Var, | NA |
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