condition found tbRes List
PL, Piperlongumine: Click to Expand ⟱
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


ER Stress, endoplasmic reticulum (ER) stress signaling pathway: Click to Expand ⟱
Source:
Type:
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
Scientific Papers found: Click to Expand⟱
2954- PL,    The metabolites from traditional Chinese medicine targeting ferroptosis for cancer therapy
- Review, Var, NA
NRF2↑, PL significantly increased ROS levels and protein glutathionylation with a concomitant elevation in Nrf-2 expression
ROS↑, PL selectively destroyed hepatocellular carcinoma cells rather than normal hepatocytes via ROS–endoplasmic reticulum (ER)–MAPK–CHOP axis,
ER Stress↑,
MAPK↑,
CHOP↑,
selectivity↑, PL selectively killed human breast cancer MCF-7 cells instead of human MCF-10A breast epithelial cells
Keap1↝, PL directly interacted with Kelch-like ECH-associated protein-1 (Keap1), which resulted in Nrf-2-mediated HO-1 expression
HO-1↑,
Ferroptosis↑, pancreatic cancer cell death mainly via the induction of ROS-mediated ferroptosis

1939- PL,    Piperlongumine selectively kills hepatocellular carcinoma cells and preferentially inhibits their invasion via ROS-ER-MAPKs-CHOP
- in-vitro, HCC, HepG2 - in-vitro, HCC, HUH7 - in-vivo, NA, NA
TumCMig↓, PL specifically suppressed HCC cell migration/invasion via endoplasmic reticulum (ER)-MAPKs-CHOP signaling pathway
TumCI↓,
ER Stress↑, Piperlongumine induces ER stress-responses which preferentially suppresses HCC cell migration/invasion
selectivity↑, PL selectively killed HCC cells but not normal hepatocytes with an IC50 of 10-20 μM while PL at much lower concentrations only suppressed HCC cell migration/invasion
tumCV↓,
ROS↑, Piperlongumine induces ROS accumulation to exert its anti-cancer effects on HCC cells
GSH↓, Consistently, intracellular glutathione (GSH) levels were significantly reduced in HepG2 or Huh7 cells at 1 h of PL treatment
eff↓, Pre-treatment of NAC or GSH completely reversed PL-induced cell death in Huh7 cells (Fig. 3E) and HepG2 cells
Ca+2↑, concentration of cytoplasmic free Ca2+ was prominently increased at 3 h of PL treatment in a dose-dependent manner (0-20 μM)
MAPK↑, Piperlongumine activates MAPKs signaling pathways which preferentially suppress HCC migration
CHOP↑, These evidences demonstrated that PL activated ER-MAPKs-CHOP axis signaling pathways via ROS-dependent mechanisms.
Dose↝, Notably, PL at a much lower concentration (1.5 mg/kg) showed a comparable anticancer effect in HCC-bearing mice and increasing PL concentration did not significantly enhance its anticancer effects

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
selectivity↑, Piperlongumine treatment increased ROS levels and preferentially killed HGG cells with little effect in normal brain cells.
ROS↑,
selectivity↑, piperlongumine treatment in HGG cells, but not in normal NSCs, increased oxidative inactivation of peroxiredoxin 4 (PRDX4), an ROS-reducing enzyme that is overexpressed in HGGs
Prx4↓, Piperlongumine Inactivates PRDX4 in HGG Cells
*Prx4∅,
ER Stress↑, Moreover, piperlongumine exacerbated intracellular ER stress
CHOP↑, We found that piperlongumine treatment rapidly and substantially increased CHOP protein levels in all 4 HGG sphere cultures
UPR↑, As with CHOP, other UPR protein levels were also increased upon piperlongumine treatment

1944- PL,    Piperlongumine, a Novel TrxR1 Inhibitor, Induces Apoptosis in Hepatocellular Carcinoma Cells by ROS-Mediated ER Stress
- in-vitro, HCC, HUH7 - in-vitro, HCC, HepG2
ER Stress↑, PL induces a lethal endoplasmic reticulum (ER) stress response in HCC cells
TrxR1↓, PL treatment reduces TrxR1 activity and tumor cell burden in vivo
ROS↑, and increasing intracellular ROS levels
eff↓, Interestingly, pretreatment with NAC, a specific ROS inhibitor, for 2 h apparently suppressed PL-induced increases in ROS levels
Bcl-2↓, PL treatment decreased the levels of the antiapoptotic proteins Bcl-2 and procaspase3 and increased the levels of the proapoptotic proteins Bax and cleaved caspase-3 in a dose-dependent manner.
proCasp3↓,
BAX↓,
cl‑Casp3↑,
TumCCA↑, PL Induces ROS-Dependent G2/M Cell Cycle Arrest in HCC Cells
p‑PERK↑, PL increased the expression of p-PERK and ATF4 in a dose-dependent manner.
ATF4↑,
TumCG↓, PL Inhibits HUH-7 Xenograft Tumor Growth Accompanied by Increased ROS Levels and Decreased Trxr1 Activity
lipid-P↑, PL treatment increased the levels of the product of lipid peroxidation (MDA) in tumor tissues ( Figure 6H ), suggesting increased ROS levels
selectivity↑, In normal cells, TrxR1 can protect against oxidant stress

1947- PL,    Piperlongumine as a direct TrxR1 inhibitor with suppressive activity against gastric cancer
- in-vitro, GC, SGC-7901 - in-vitro, GC, NA
TrxR1↓, In vivo, PL treatment markedly reduces the TrxR1 activity and tumor cell burden
ROS↑, PL may interact with the thioredoxin reductase 1 (TrxR1), an important selenocysteine (Sec)-containing antioxidant enzyme, to induce reactive oxygen species (ROS)-mediated apoptosis in human gastric cancer cells
ER Stress↑, PL induces a lethal endoplasmic reticulum stress and mitochondrial dysfunction in human gastric cancer cells
mtDam↑,
selectivity↑, known to selectively kill tumor cells while sparing their normal counterparts. PL treatment did not cause a significant increase in ROS levels in normal GES-1 cells
NO↑, we found that nitric oxide was also induced by PL in gastric cancer cells
TumCCA↑, PL treatment significantly induced G2/M cell cycle arrest in human gastric cancer SGC-7901, BGC-823 and KATO III cells.
mt-ROS↑, mitochondrial ROS, were involved in the PL-induced cell death in gastric cancer cells.
Casp9↑, Notably, caspase-9 activity was significantly elevated after PL treatment in SGC-7901 cells
Bcl-2↓, PL treatment dose-dependently decreased the expression of antiapoptotic proteins Bcl-2 and Bcl-xL, but induced the cleavage of poly (ADP-ribose) polymerase (PARP)
Bcl-xL↓,
cl‑PARP↑,
eff↓, Pre-incubation with GSH attenuated these effects confirming their linkage to PL-induced oxidative stress
lipid-P↑, PL dose-dependently increased the level of lipid peroxidation product (MDA), a marker of ROS, in tumor tissues

2649- PL,    Oxidative Stress Inducers in Cancer Therapy: Preclinical and Clinical Evidence
- Review, Var, NA
AntiCan↑, investigated for its anticancer activity in various cancer types, including hematological cancers, colorectal, gastric, lung, breast, prostate, and oral cancers, melanoma, and glioma
ROS↑, Its in vitro anticancer activity can be attributed to induction of ROS through increased glutathione disulfide levels, decreased glutathione levels
GSH↓,
TrxR↓, inhibition of thioredoxin reductase (TrxR), an enzyme which reduces thioredoxin, a redox protein that protects against oxidative stress
Trx↓,
Apoptosis↑, PPL-mediated ROS accumulation further leads to ROS-mediated apoptosis
TumCCA↑, G1 or G2/M cell cycle arrest
ER Stress↑, ER stress
DNAdam↑, oxidative DNA damage
ChemoSen↑, PPL was reported to sensitize head and neck, gastric, and liver cancers to cisplatin [18], oxaliplatin [19], and sorafenib [20], respectively
BioAv↓, Additionally, its poor aqueous solubility and bioavailability limit its therapeutic potential

2946- PL,    Piperlongumine, a potent anticancer phytotherapeutic: Perspectives on contemporary status and future possibilities as an anticancer agent
- Review, Var, NA
ROS↑, piperlongumine inhibits cancer growth by resulting in the accumulation of intracellular reactive oxygen species, decreasing glutathione and chromosomal damage, or modulating key regulatory proteins, including PI3K, AKT, mTOR, NF-kβ, STATs, and cycD
GSH↓, reduced glutathione (GSH) levels in mouse colon cancer cells
DNAdam↑,
ChemoSen↑, combined treatment with piperlongumine potentiates the anticancer activity of conventional chemotherapeutics and overcomes resistance to chemo- and radio- therapy
RadioS↑, piperlongumine treatment enhances ROS production via decreasing GSH levels and causing thioredoxin reductase inhibition
BioEnh↑, Moreover, the bioavailability is significantly improved after oral administration of piperlongumine
selectivity↑, It shows selectivity toward human cancer cells over normal cells and has minimal side effects
BioAv↓, ts low aqueous solubility affects its anti-cancer activity by limiting its bioavailability during oral administration
eff↑, encapsulation of piperlongumine in another biocompatible natural polymer, chitosan, has been found to result in pH-dependent piperlongumine release and to enhance cytotoxicity via efficient intracellular ROS accumulation against human gastric carcin
p‑Akt↓, Fig 2
mTOR↓,
GSK‐3β↓,
β-catenin/ZEB1↓,
HK2↓, iperlongumine treatment decreases cell proliferation, single-cell colony-formation ability, and HK2-mediated glycolysis in NSCLC cells via inhibiting the interaction between HK2 and voltage-dependent anion channel 1 (VDAC1)
Glycolysis↓,
Cyt‑c↑,
Casp9↑,
Casp3↑,
Casp7↑,
cl‑PARP↑,
TrxR↓, piperlongumine (4 or 12 mg/kg/day for 15 days) administration significantly inhibits increase in tumor weight and volume with less TrxR1 activity in SGC-7901 cell
ER Stress↑,
ATF4↝,
CHOP↑, activating the downstream ER-MAPK-C/EBP homologous protein (CHOP) signaling pathway
Prx4↑, piperlongumine kills high-grade glioma cells via oxidative inactivation of PRDX4 mediated ROS induction, thereby inducing intracellular ER stress
NF-kB↓, piperlongumine treatment (2.5–5 mg/ kg body weight) decreases the growth of lung tumors via inhibition of NF-κB
cycD1↓, decreases expression of cyclin D1, cyclin- dependent kinase (CDK)-4, CDK-6, p- retinoblastoma (p-Rb)
CDK4↓,
CDK6↓,
p‑RB1↓,
RAS↓, piperlongumine downregulates the expression of Ras protein
cMyc↓, inhibiting the activity of other related proteins, such as Akt/NF-κB, c-Myc, and cyclin D1 in DMH + DSS induced colon tumor cells
TumCCA↑, by arresting colon tumor cells in the G2/M phase of the cell cycle
selectivity↑, hows more selective cytotoxicity against human breast cancer MCF-7 cells than human breast epithelial MCF-10A cells
STAT3↓, thus inducing inhibition of the STAT3 signaling pathway in multiple myeloma cells
NRF2↑, Nrf2) activation has been found to mediate the upregulation of heme oxygenase-1 (HO-1) in piperlongumine treated MCF-7 and MCF-10A cells
HO-1↑,
PTEN↑, stimulates ROS accumulation; p53, p27, and PTEN overexpression
P-gp↓, P-gp, MDR1, MRP1, survivin, p-Akt, NF-κB, and Twist downregulation;
MDR1↓,
MRP1↓,
survivin↓,
Twist↓,
AP-1↓, iperlongumine significantly suppresses the expression of transcription factors, such as AP-1, MYC, NF-κB, SP1, STAT1, STAT3, STAT6, and YY1.
Sp1/3/4↓,
STAT1↓,
STAT6↓,
SOX4↑, increased expression of p21, SOX4, and XBP in B-ALL cells
XBP-1↑,
P21↑,
eff↑, combined use of piperlongumine with cisplatin enhances the sensitivity toward cisplatin by inhibiting Akt phosphorylation
Inflam↓, inflammation (COX-2, IL6); invasion and metastasis, such as ICAM-1, MMP-9, CXCR-4, VEGF;
COX2↓,
IL6↓,
MMP9↓,
TumMeta↓,
TumCI↓,
ICAM-1↓,
CXCR4↓,
VEGF↓,
angioG↓,
Half-Life↝, The analysis of the plasma of piperlongumine treated mice (50 mg/kg) after intraperitoneal administration, 1511.9 ng/ml, 418.2 ng/ml, and 41.9 ng/ml concentrations ofplasma piperlongumine were found at 30 minutes, 3 hours, and 24 hours, respecti
BioAv↑, Moreover, the bioavailability is significantly improved after oral administration of piperlongumine


* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 7

Results for Effect on Cancer/Diseased Cells:
p‑Akt↓,1,   angioG↓,1,   AntiCan↑,1,   AP-1↓,1,   Apoptosis↑,1,   ATF4↑,1,   ATF4↝,1,   BAX↓,1,   Bcl-2↓,2,   Bcl-xL↓,1,   BioAv↓,2,   BioAv↑,1,   BioEnh↑,1,   Ca+2↑,1,   Casp3↑,1,   cl‑Casp3↑,1,   proCasp3↓,1,   Casp7↑,1,   Casp9↑,2,   CDK4↓,1,   CDK6↓,1,   ChemoSen↑,2,   CHOP↑,4,   cMyc↓,1,   COX2↓,1,   CXCR4↓,1,   cycD1↓,1,   Cyt‑c↑,1,   DNAdam↑,2,   Dose↝,1,   eff↓,3,   eff↑,2,   ER Stress↑,7,   Ferroptosis↑,1,   Glycolysis↓,1,   GSH↓,3,   GSK‐3β↓,1,   Half-Life↝,1,   HK2↓,1,   HO-1↑,2,   ICAM-1↓,1,   IL6↓,1,   Inflam↓,1,   Keap1↝,1,   lipid-P↑,2,   MAPK↑,2,   MDR1↓,1,   MMP9↓,1,   MRP1↓,1,   mtDam↑,1,   mTOR↓,1,   NF-kB↓,1,   NO↑,1,   NRF2↑,2,   P-gp↓,1,   P21↑,1,   cl‑PARP↑,2,   p‑PERK↑,1,   Prx4↓,1,   Prx4↑,1,   PTEN↑,1,   RadioS↑,1,   RAS↓,1,   p‑RB1↓,1,   ROS↑,7,   mt-ROS↑,1,   selectivity↑,8,   SOX4↑,1,   Sp1/3/4↓,1,   STAT1↓,1,   STAT3↓,1,   STAT6↓,1,   survivin↓,1,   Trx↓,1,   TrxR↓,2,   TrxR1↓,2,   TumCCA↑,4,   TumCG↓,1,   TumCI↓,2,   TumCMig↓,1,   tumCV↓,1,   TumMeta↓,1,   Twist↓,1,   UPR↑,1,   VEGF↓,1,   XBP-1↑,1,   β-catenin/ZEB1↓,1,  
Total Targets: 87

Results for Effect on Normal Cells:
Prx4∅,1,  
Total Targets: 1

Scientific Paper Hit Count for: ER Stress, endoplasmic reticulum (ER) stress signaling pathway
7 Piperlongumine
Filter Conditions: Pro/AntiFlg:%  IllCat:%  CanType:%  Cells:%  prod#:134  Target#:103  State#:%  Dir#:%
  wNotes=on  sortOrder:rid,rpid

 

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