| Features: |
| 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 |
| Source: |
| Type: |
| Cellular stress response related to the endoplasmic reticulum (ER) stress, which involves protein folding, quality control, and signaling pathways. The unfolded protein response (UPR) is the cells' way of maintaining the balance of protein folding in the endoplasmic reticulum. (UPR) is triggered by the presence of misfolded proteins in the endoplasmic reticulum. The UPR is a cellular stress response activated by the accumulation of unfolded or misfolded proteins in the endoplasmic reticulum (ER). - It is primarily mediated by three ER-resident sensors: IRE1α, PERK, and ATF6. Cancer cells often experience high levels of protein synthesis, hypoxia, nutrient deprivation, and oxidative stress, all of which can activate the UPR. – Numerous studies have reported that key UPR components (e.g., GRP78/BiP, IRE1α, PERK, CHOP) are overexpressed in various malignancies such as breast, pancreatic, lung, and prostate cancers. Unfolded Protein Response is typically upregulated in cancers and is associated with poorer prognosis due to its role in promoting cell survival, adaptation to stress, and therapeutic resistance. Although the UPR harbors the potential for tumor-suppressive (apoptotic) effects under severe stress conditions, its predominant activation in tumors supports an adaptive, protumorigenic state that facilitates cancer progression. Targeting UPR components and modulating this balance remain promising therapeutic strategies. |
| 1943- | PL, | Piperlongumine treatment inactivates peroxiredoxin 4, exacerbates endoplasmic reticulum stress, and preferentially kills high-grade glioma cells |
| - | in-vitro, | GBM, | NA | - | in-vivo, | NA, | NA |
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