UPR Cancer Research Results

UPR, Unfolded Protein Response: Click to Expand ⟱
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.
Scientific Papers found: Click to Expand⟱
2676- BBR,    Berberine protects rat heart from ischemia/reperfusion injury via activating JAK2/STAT3 signaling and attenuating endoplasmic reticulum stress
- in-vivo, Nor, NA - in-vivo, CardioV, NA
*cardioP↑, Pretreatment with BBR significantly reduced MI/R-induced myocardial infarct size, improved cardiac function, and suppressed myocardial apoptosis and oxidative damage.
*ROS↓,
*ER Stress↓, pretreatment with BBR suppressed MI/R-induced ER stress
*p‑PERK↓, evidenced by down-regulating the phosphorylation levels of myocardial PERK and eIF2α and the expression of ATF4 and CHOP in heart tissues.
*p‑eIF2α↓,
*ATF4↓,
CHOP↓,
*JAK2↑, Pretreatment with BBR also activated the JAK2/STAT3 signaling pathway in heart tissues
*STAT3↑,
*UPR↓, Therefore, reducing excessive UPR, also referred to as ER stress, is of great importance in ameliorating MI/R injury.

3202- EGCG,    Epigallocatechin-3-gallate enhances ER stress-induced cancer cell apoptosis by directly targeting PARP16 activity
- in-vitro, Cerv, HeLa - in-vitro, HCC, QGY-7703
PARP16↓, (EGCG) as a potential inhibitor of PARP16.
p‑PERK↓, EGCG suppressed the ER stress-induced phosphorylation of PERK and the transcription of unfolded protein response-related genes,
Apoptosis↑, leading to dramatically increase of cancer cells apoptosis
eIF2α↓, EGCG suppressed the phosphorylation of PERK and eIF2α induced by ER stress.
UPR↓, UPR-related gene was dramatically induced by BFA and TUN, and this induction was suppressed by treatment of Hela cells with EGCG, further suggesting that EGCG suppressed the UPR induced by ER stress.
ER Stress↑, EGCG can dramatically inhibit the activity of PARP16, and then suppressed the ER stress-induced PERK phosphorylation, leading to dramatical increase of the ER stress-induced apoptosis of cancer cells.
eff↑, These results indicate that EGCG can be used in combination with ER stress-induced drugs to treat the cancer cell.
GRP78/BiP↓, EGCG had previously been found to bind to the ATP-binding domain of glucose regulate protein 78 (GRP78),

3203- EGCG,    (-)- Epigallocatechin-3-gallate induces GRP78 accumulation in the ER and shifts mesothelioma constitutive UPR into proapoptotic ER stress
- NA, MM, NA
ROS↑, We have previously shown that (-)-epigallocatechin-3-gallate (EGCG) enhances ROS production and alters Ca2+ homeostasis in cell lines deriving from therapy-recalcitrant malignant mesothelioma (MMe).
Ca+2↝,
GRP78/BiP↑, Exposure to EGCG further increased GRP78 in the ER, and induced ATF4, spliced XBP1, CHOP, and EDEM expressions, combined with a reduction of cell surface GRP78 and a rise in caspase 3 and 8 activities.
ATF4↑,
XBP-1↑,
CHOP↑,
Casp3↑,
Casp8↑,
*GRP78/BiP↓, n non-cancer mouse retinal pigment epithelial cells,EGCG has been found to downregulate GRP78 and UPR signaling (Karthikeyan et al., 2017).
*UPR↓,
UPR↑, However, if ER homeostasiscannot be re-established, the UPR switches its signaling toward irreversible ER stress with the activation of apoptosis (

3206- EGCG,    Insights on the involvement of (-)-epigallocatechin gallate in ER stress-mediated apoptosis in age-related macular degeneration
- Review, AMD, NA
*Ca+2↓, EGCG restores [Ca2+]i homeostasis by decreasing ROS production through inhibition of prohibitin1 which regulate ER-mitochondrial tether site and inhibit apoptosis.
*ROS↓,
*Apoptosis↓,
*GRP78/BiP↓, EGCG downregulated GRP78, CHOP, PERK, ERO1α, IRE1α, cleaved PARP, cleaved caspase 3, caspase 12 and upregulated expression of calnexinin MRPE cells
*CHOP↓,
*PERK↓,
*IRE1↓,
*p‑PARP↓,
*Casp3↓,
*Casp12↓,
*ER Stress↓,
*UPR↓, EGCG mitigates ER stress; maintain calcium homeostasis and inhibition of UPR to control the progression of AMD.

3337- QC,    Endoplasmic Reticulum Stress-Relieving Effect of Quercetin in Thapsigargin-Treated Hepatocytes
- in-vitro, NA, HepG2
*Inflam↓, quercetin exerts anti-inflammatory and anti–insulin resistance actions by suppressing UPR in cells experiencing ER stress
*UPR↓,
*GRP58↓, (GRP78) and the downstream proteins such as X-box binding protein 1 (XBP1). The increased expression was significantly inhibited by quercetin, indicating that this compound can relieve ER stress
*XBP-1↓,
*ER Stress↓, previous reports as well as our results, we suggest that quercetin can inhibit ER stress in hepatocytes
*antiOx↑, Quercetin, a well-known antioxidant, is one of the most abundant flavonols in vegetables and fruits and has been shown to have many pharmacological actions
TNF-α↓, Quercetin suppressed the increased expression of TNF-α significantly and dose-dependently
p‑eIF2α↓, quercetin treatment suppressed the phosphorylation of eIF2α, IRE1α and JNK and the mRNA expression of XBP-1, GRP78 and CHOP
p‑IRE1↓,
p‑JNK↓,
CHOP↓,

3950- Taur,    Taurine Supplementation as a Neuroprotective Strategy upon Brain Dysfunction in Metabolic Syndrome and Diabetes
- Review, Diabetic, NA - Review, Stroke, NA - Review, AD, NA
*Ca+2↝, taurine homeostasis can impact a number of biological processes, such as osmolarity control, calcium homeostasis, and inhibitory neurotransmission, and have been reported in both metabolic and neurodegenerative disorders.
*neuroP↑, taurine can afford neuroprotection in individuals with obesity and diabetes.
*other↝, Notably, both methionine and cysteine produced from protein degradation can generate taurine as an end-product
*pH↝, Taurine might counteract extreme mitochondrial pH fluctuations and help preserve mitochondrial physiology.
*ROS∅, Taurine is not able to act as a radical scavenger
eff↑, Taurine also decreased the activity of glutathione peroxidase and manganese-superoxide dismutase upon tamoxifen toxicity, which contributed to decreasing mitochondrial oxidative stress, measured through lipid peroxidation, protein carbonyl content, a
*MMP↑, In sum, taurine supplementation is proposed to improve the function of the mitochondria, contributing to the preservation of mitochondrial membrane potential, proton gradient, and matrix pH that are critical for energy metabolism and efficient oxidat
*Apoptosis↓, Taurine was found to prevent apoptosis upon many noxious challenges
*other↝, The most striking neuroprotective effects of taurine were observed on the reduction of apoptotic rates and the improvement of neurological outcomes upon brain ischemia.
*ER Stress↓, prevention of mitochondrial and endoplasmic reticulum (ER) stress.
*Bcl-xL↓, reduction of anti-apoptotic Bcl-xL and the increase of the pro-apoptotic Bax, preventing cytochrome C release from the mitochondria, and inhibiting the activation of calpain and caspase-3
*BAX↑,
*Cyt‑c↑,
*cal2↓,
*Casp3↓,
*UPR↓, prevent ischemia/hypoxia-induced endoplasmic reticulum (ER) stress by inhibiting the unfolded protein response via transcription factor 6 (ATF6), protein kinase R-like ER kinase (PERK), and inositol-requiring enzyme 1 (IRE1) pathways
*other↝, Altogether, one might speculate that taurine loss in patients with AD is linked to worsened cognitive deterioration.
*NF-kB↓, ameliorated the diabetes-induced increase of the transcription factor NF-κβ, involved in inflammatory processes, and the diabetes-induced reduction of Nrf2 and glucose transporters Glut1 and Glut3 in the brain.
*NRF2↑,
*GLUT1↑,
*GLUT3↑,
*memory↑, In mice fed a fat-rich diet, which develop metabolic syndrome, we recently demonstrated that 3% (w/v) taurine supplemented in the drinking water for 2 months prevented memory impairment


Showing Research Papers: 1 to 6 of 6

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 6

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

ROS↑, 1,  

Cell Death ⓘ

Apoptosis↑, 1,   Casp3↑, 1,   Casp8↑, 1,   p‑JNK↓, 1,  

Protein Folding & ER Stress ⓘ

CHOP↓, 2,   CHOP↑, 1,   eIF2α↓, 1,   p‑eIF2α↓, 1,   ER Stress↑, 1,   GRP78/BiP↓, 1,   GRP78/BiP↑, 1,   p‑IRE1↓, 1,   p‑PERK↓, 1,   UPR↓, 1,   UPR↑, 1,   XBP-1↑, 1,  

Migration ⓘ

Ca+2↝, 1,  

Angiogenesis & Vasculature ⓘ

ATF4↑, 1,  

Immune & Inflammatory Signaling ⓘ

TNF-α↓, 1,  

Drug Metabolism & Resistance ⓘ

eff↑, 2,  

Functional Outcomes ⓘ

PARP16↓, 1,  
Total Targets: 22

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress ⓘ

antiOx↑, 1,   NRF2↑, 1,   ROS↓, 2,   ROS∅, 1,  

Mitochondria & Bioenergetics ⓘ

MMP↑, 1,  

Cell Death ⓘ

Apoptosis↓, 2,   BAX↑, 1,   Bcl-xL↓, 1,   Casp12↓, 1,   Casp3↓, 2,   Cyt‑c↑, 1,   GRP58↓, 1,  

Transcription & Epigenetics ⓘ

other↝, 3,  

Protein Folding & ER Stress ⓘ

CHOP↓, 1,   p‑eIF2α↓, 1,   ER Stress↓, 4,   GRP78/BiP↓, 2,   IRE1↓, 1,   PERK↓, 1,   p‑PERK↓, 1,   UPR↓, 5,   XBP-1↓, 1,  

DNA Damage & Repair ⓘ

p‑PARP↓, 1,  

Proliferation, Differentiation & Cell State ⓘ

STAT3↑, 1,  

Migration ⓘ

Ca+2↓, 1,   Ca+2↝, 1,   cal2↓, 1,  

Angiogenesis & Vasculature ⓘ

ATF4↓, 1,  

Barriers & Transport ⓘ

GLUT1↑, 1,   GLUT3↑, 1,  

Immune & Inflammatory Signaling ⓘ

Inflam↓, 1,   JAK2↑, 1,   NF-kB↓, 1,  

Cellular Microenvironment ⓘ

pH↝, 1,  

Functional Outcomes ⓘ

cardioP↑, 1,   memory↑, 1,   neuroP↑, 1,  
Total Targets: 37

Scientific Paper Hit Count for: UPR, Unfolded Protein Response
3 EGCG (Epigallocatechin Gallate)
1 Berberine
1 Quercetin
1 Taurine
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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