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DRUG CLASS:

Unfolded protein response activator

Related drugs:
almost2years
JQ-1/Bortezomib combination strongly impairs MM and PEL survival by inhibiting c-Myc and mTOR despite the activation of pro-survival mechanisms. (PubMed, Exp Hematol)
Such an effect contributed to mechanistic target of rapamycin (mTOR)-phosphorylated eukaryotic translation initiation factor 4E-binding protein 1 (p-4EBP1) axis inhibition, also occurring through c-Myc downregulation. However, besides the pro-death effects, JQ-1/Bortezomib activated UPR and autophagy as pro-survival mechanisms. In conclusion this study demonstrates that JQ-1/Bortezomib combination could be a promising treatment for MM and PEL, unveiling new molecular mechanisms underlying its cytotoxic effect and suggests that UPR and autophagy inhibition could be exploited to further potentiate the cytotoxicity of JQ-1/Bortezomib.
Journal
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MYC (V-myc avian myelocytomatosis viral oncogene homolog) • EIF4EBP1 (Eukaryotic translation initiation factor 4E binding protein 1) • NRF1 (Nuclear Respiratory Factor 1)
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bortezomib • JQ-1 • sirolimus
almost2years
Molecular interplay between NOX1 and autophagy in cadmium-induced prostate carcinogenesis. (PubMed, Free Radic Biol Med)
Knockdown of key molecules in a lockstep manner directly affects the most downstream autophagy pathways in transforming cells. Overall, this study demonstrates that assembly of NOX1 complex proteins is indispensable for Cd-induced persistent ROS and controls ER stress-induced defective autophagy in mice and humans.
Journal
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ATF4 (Activating Transcription Factor 4) • PERK (Pancreatic EIF2-Alpha Kinase)
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ATG5 expression
almost2years
Human-induced pluripotent stem cell-derived cerebral organoid of leukoencephalopathy with vanishing white matter. (PubMed, CNS Neurosci Ther)
we constructed the first eIF2B mutant cerebral organoids to explore the dynamic brain development process, which provides a platform for further research on the specific pathogenesis of VWM.
Journal
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NES (Nestin) • EIF2B4 (Eukaryotic Translation Initiation Factor 2B Subunit Delta)
almost2years
SIRT7 orchestrates melanoma progression by simultaneously promoting cell survival and immune evasion via UPR activation. (PubMed, Signal Transduct Target Ther)
Additionally, the synergized therapeutic effect of SIRT7 suppression and anti-PD-1 immune checkpoint blockade was also investigated. Taken together, SIRT7 can be employed as a promising target to restrain tumor growth and increase the effect of melanoma immunotherapy.
Journal • PD(L)-1 Biomarker • IO biomarker
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PD-L1 (Programmed death ligand 1) • SMAD4 (SMAD family member 4) • TGFB1 (Transforming Growth Factor Beta 1) • XBP1 (X-box-binding protein 1)
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PD-L1 expression
almost2years
Loss of ATF6α in a Human Carcinoma Cell Line Is Compensated not by Its Paralogue ATF6β but by Sustained Activation of the IRE1 and PERK Arms for Tumor Growth in Nude Mice. (PubMed, Mol Biol Cell)
Although IRE1-knockout in HCT116 cells unexpectedly did not affect tumor growth in nude mice, IRE1-knockout HCT116 cells with ATF6α knockdown grew significantly more slowly than wild-type or IRE1-knockout HCT116 cells. These results have unraveled the situation-dependent differential compensation strategies of ATF6α.
Preclinical • Journal
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ATF6 (Activating Transcription Factor 6) • ERN1 (Endoplasmic Reticulum To Nucleus Signaling 1)
almost2years
A Mulberry Diels-Alder-Type Adduct, Kuwanon M, Triggers Apoptosis and Paraptosis of Lung Cancer Cells through Inducing Endoplasmic Reticulum Stress. (PubMed, Int J Mol Sci)
Mechanistically, ER stress induced activation of unfolded protein response (UPR) pathways and activation of the MAPK (JNK and ERK) pathway, all of which were critical for KWM-induced apoptosis and paraptosis. These findings suggested the possibility that KWM might be considered as a potential lung cancer therapeutic agent.
Journal
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BCL2 (B-cell CLL/lymphoma 2) • BAX (BCL2-associated X protein)
2years
An investigation of Sigma-1 receptor expression and ligand-induced endoplasmic reticulum stress in breast cancer. (PubMed, Cancer Gene Ther)
In tamoxifen-resistant LY2 cells, IPAG caused Sig1R to aggregate and co-localise with the stress marker BiP. These findings showcase the potential of Sig1R as a novel biomarker in TNBC as well as highlight its ligand-induced interference with the stress-coping mechanisms of BCa cells.
Journal
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HER-2 (Human epidermal growth factor receptor 2) • ER (Estrogen receptor)
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tamoxifen
2years
IRE1α-XBP1 regulates PDK1-dependent induction of epithelial-mesenchymal transition in non-small cell lung cancer cells. (PubMed, Exp Cell Res)
In this study, we utilized ER stress-inducing reagent, thapsigargin (TG), to induced pharmacologic ER stress in lung cancer cells...In addition, PDK1-induced Snail was dependent on the lactate production derived from metabolic reprogramming. Our findings reveal a critical role of lactate in pro-invasion events and establishes a direct connection between ER-stress and metabolic reprogramming in facilitating cancer cell progression.
Journal
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XBP1 (X-box-binding protein 1) • PDK1 (Pyruvate Dehydrogenase Kinase 1)
2years
Age alters the oncogenic trajectory toward luminal mammary tumors that activate unfolded proteins responses. (PubMed, Aging Cell)
We found these genes to be involved in the activation of the ERα axis of the mitochondrial UPR and the ERα-mediated regulation of XBP-1s, a gene involved in the endoplasmic reticulum UPR. Collectively, our results indicate that aging alters the oncogenic trajectory towards the ERα-positive subtype of breast cancers, and that mammary tumors in aged mice are characterized by the upregulation of multiple UPR stress responses regulated by the ERα.
Journal
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ER (Estrogen receptor)
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ER positive
2years
Per- and polyfluoroalkyl substances activate UPR pathway, induce steatosis and fibrosis in liver cells. (PubMed, Environ Toxicol)
RNA-seq data suggested that chronic exposures to PFOA modulated the expression of fatty acid/lipid metabolic genes that are involved in the development of NFALD and fatty liver disease. Collectively our data suggest that acute/chronic physiologically relevant concentrations of PFAS enhance liver cell steatosis and fibrosis by the activation of the UPR pathway and by modulation of NFALD-related gene expression.
Journal
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IL6 (Interleukin 6) • TNFA (Tumor Necrosis Factor-Alpha) • TGFB1 (Transforming Growth Factor Beta 1) • TIMP2 (TIMP Metallopeptidase Inhibitor 2) • FASN (Fatty acid synthase) • CDKN1A (Cyclin-dependent kinase inhibitor 1A)
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IL6 expression
2years
Salinomycin suppresses T24 cells by regulating KDM1A and the unfolded protein response pathway. (PubMed, Cytotechnology)
Collectively, our study revealed that salinomycin suppressed T24 cell proliferation and promoted oxidative stress and apoptosis by regulating KDM1A and the UPR pathway. The online version contains supplementary material available at 10.1007/s10616-022-00546-y.
Journal
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KDM1A (Lysine Demethylase 1A)
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KDM1A overexpression • KDM1A expression
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salinomycin (HSB-1216)
2years
Ablation of the endoplasmic reticulum stress kinase PERK induces paraptosis and type I interferon to promote anti-tumor T cell responses. (PubMed, Cancer Cell)
ICD induction in PERK-ablated tumors stimulates type I interferon production in dendritic cells (DCs), which primes CCR2-dependent tumor trafficking of common-monocytic precursors and their intra-tumor commitment into monocytic-lineage inflammatory Ly6CCD103 DCs. These findings identify how tumor cell-derived PERK promotes immune evasion and highlight the potential of PERK-targeting therapies in cancer immunotherapy.
Journal
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ITGAE (Integrin Subunit Alpha E) • CCR2 (C-C Motif Chemokine Receptor 2) • PERK (Pancreatic EIF2-Alpha Kinase)
over2years
Bortezomib- and carfilzomib-resistant myeloma cells show increased activity of all three arms of the unfolded protein response. (PubMed, Am J Cancer Res)
In functional studies, both drugs continued to reduce chymotrypsin-like proteasome activity in resistant cells. Both baseline and drug-induced activity of the unfolded protein response were higher in resistant cells than in MM1S WT cells and included all three arms of this pathway: IRE1α/XBP1s, ATF6 and EIF2α/ATF4 (downstream effectors of PERK). In conclusion, contrary to some previous reports, resistant MM1S cells show upregulation of unfolded protein response activity, reflecting the heterogeneity of multiple myeloma and prompting further studies on the role of this pathway in resistance to proteasome inhibitors.
Journal
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ATF4 (Activating Transcription Factor 4) • ATF6 (Activating Transcription Factor 6)
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bortezomib • carfilzomib
over2years
The clinical relevance of unfolded protein response signaling in breast cancer. (PubMed, Am J Cancer Res)
Finally, high UPR metastatic breast cancer was also associated with worse patient survival (P=0.041). UPR signaling is associated with cancer aggressiveness, and worse survival, especially ER-positive/HER2-negative breast cancer subtype.
Journal
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HER-2 (Human epidermal growth factor receptor 2) • ER (Estrogen receptor)
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HER-2 positive • ER positive • HER-2 negative • ER positive + HER-2 negative
over2years
HBXIP is a novel regulator of the unfolded protein response that sustains tamoxifen resistance in ER+ breast cancer. (PubMed, J Biol Chem)
Furthermore, reinforced HBXIP expression associated with a high recurrence and poor relapse-free survival rates in tamoxifen monotherapy ER+ breast cancer patients. These findings indicate that HBXIP is a novel regulator of EnR homeostasis and a potential target for TamR breast cancer therapy.
Journal
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ER (Estrogen receptor) • ATF6 (Activating Transcription Factor 6) • ERN1 (Endoplasmic Reticulum To Nucleus Signaling 1) • PERK (Pancreatic EIF2-Alpha Kinase)
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ER positive
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tamoxifen
almost3years
GSDMD enhances cisplatin-induced apoptosis by promoting the phosphorylation of eIF2α and activating the ER-stress response. (PubMed, Cell Death Discov)
Therefore, for the first time, our work reveals an unreported nonpyroptotic function of the classic pyroptosis protein GSDMD: it promotes cell apoptosis during cisplatin chemotherapy by inducing eIF2α phosphorylation and ER stress, which are related to the drug sensitivity of tumours. Our study also indicated that GSDMD might serve as a biomarker for cisplatin sensitivity.
Journal
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ATF4 (Activating Transcription Factor 4)
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cisplatin
almost3years
Clinical relevance of unfolded protein response (UPR) signaling in breast cancer (AACR 2022)
UPR signaling is associated with cancer aggressiveness, and with worse survival in breast cancer, especially ER-positive/HER2-negative breast cancer subtype.
Clinical
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HER-2 (Human epidermal growth factor receptor 2) • ER (Estrogen receptor)
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HER-2 positive • ER positive • HER-2 negative • ER positive + HER-2 negative
almost3years
Hepatitis B virus small envelope protein promotes HCC angiogenesis via ER stress signaling to upregulate VEGFA expression. (PubMed, J Virol)
Mechanistically, SHBs induced endoplasmic reticulum (ER) stress which consequently activated unfolded protein response (UPR) signaling to increase VEGFA expression and secretion. This study suggests that SHBs plays an important pro-angiogenic role in HBV-associated HCC and may represent a potential target for anti-angiogenic therapy in the HCC.
Journal
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ATF6 (Activating Transcription Factor 6) • ERN1 (Endoplasmic Reticulum To Nucleus Signaling 1)
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VEGFA expression
almost3years
Lipocalin-2 (LCN2) Deficiency Leads to Cellular Changes in Highly Metastatic Human Prostate Cancer Cell Line PC-3. (PubMed, Cells)
Interestingly, an inverse correlation between phosphorylation of eukaryotic initiation factor 2 α subunit (p-eIF2α) and LCN2 expression was observed suggesting that LCN2 triggers protein synthesis under stress conditions. The finding that LCN2 depletion leads to significant phenotypic and cellular changes in PC-3 cells adds LCN2 as a valuable target for the treatment of PCa.
Preclinical • Journal
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LCN2 (Lipocalin-2) • IL1B (Interleukin 1, beta)
3years
CRISPR / Cas9 genome editing of hot-spot ELANE mutations in iPSCs of severe Congenital neutropenia patients (DGHO 2021)
In summary, we established an efficient CRISPR / Cas9-RNP based gene-editing platform of iPSCs of ELANE-CN patients that may be used for isogenic disease modeling or provide novel stem cell-based therapy for CN patients with a high risk of leukemia development as well as for G-CSF-non-responsive patients. This platform could also be applied for other monogenic bone marrow failure syndromes.
Clinical
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ATF4 (Activating Transcription Factor 4)
over3years
Melatonin Improves Endoplasmic Reticulum Stress-Mediated IRE1α Pathway in Zücker Diabetic Fatty Rat. (PubMed, Pharmaceuticals (Basel))
These improvements were associated with renal structural recovery. Taken together, our findings revealed that melatonin play a renoprotective role, at least in part, by suppressing ER stress and related pro-apoptotic IRE1α/JNK signaling pathway.
Preclinical • Journal
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CASP3 (Caspase 3) • ATF6 (Activating Transcription Factor 6) • ERN1 (Endoplasmic Reticulum To Nucleus Signaling 1) • PERK (Pancreatic EIF2-Alpha Kinase)
4years
Activating KRAS, NRAS, and BRAF mutants enhance proteasome capacity and reduce endoplasmic reticulum stress in multiple myeloma. (PubMed, Proc Natl Acad Sci U S A)
Finally, a bortezomib (BTZ)/MEK inhibitor combination showed enhanced activity in vivo specifically in CA-NRAS models. Taken together, the data support the hypothesis that activating MAPK pathway mutations enhance PI resistance by increasing proteasome capacity, and provide a rationale for targeting such patients with PI/RAF or PI/MEK inhibitor combinations. Moreover, they argue these mutations promote myeloma survival by reducing cellular stress, thereby distancing plasma cells from the apoptotic threshold, potentially explaining their high frequency in myeloma.
Journal
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KRAS (KRAS proto-oncogene GTPase) • BRAF (B-raf proto-oncogene) • NRAS (Neuroblastoma RAS viral oncogene homolog) • NFE2L2 (Nuclear Factor, Erythroid 2 Like 2)
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BRAF V600E • BRAF mutation • NRAS mutation • BRAF V600 • KRAS G12V • KRAS G12 • NRAS Q61 • KRAS G13 • KRAS Q61H • NRAS G13 • KRAS G13D + BRAF mutation
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bortezomib