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Synthesis and anti-melanoma effect of 3-O-prenyl glycyrrhetinic acid against B16F10 cells via induction of endoplasmic reticulum stress-mediated autophagy through ERK/AKT signaling pathway
In this study, 4-phenylbutyric acid (4PBA, a chemical chaperone) and small interference RNA (siRNA) knockdown of C/EBP Homologous Protein (CHOP)/growth arrest- and DNA damage-inducible gene 153(GAD153) blocked NPC-402-mediated autophagy induction, thus confirming the role of ER stress and autophagy in melanoma cell death. NPC-402 induced oxidative stress and apoptosis in melanoma cells, which were effectively mitigated by treatment with N-acetylcysteine (NAC). In vivo studies showed that intraperitoneal (i.p.) injection of NPC-402 at 10 mg/kg (5 days in 1 week) significantly retarded angiogenesis in the Matrigel plug assay...
Source: Frontiers in Oncology - August 2, 2022 Category: Cancer & Oncology Source Type: research

Downregulation of MUTYH contributes to cisplatin ‑resistance of esophageal squamous cell carcinoma cells by promoting Twist‑mediated EMT.
In conclusion, the present data demonstrated that EMT activation mediated by MUTYH downregulation, by both enhancing Twist transcription and blocking its degradation, is one of the mechanisms for acquisition of CDDP resistance in ESCC. PMID: 31578574 [PubMed - as supplied by publisher]
Source: Oncology Reports - October 4, 2019 Category: Cancer & Oncology Tags: Oncol Rep Source Type: research

Sanguinarine Induces Apoptosis Pathway in Multiple Myeloma Cell Lines via Inhibition of the JaK2/STAT3 Signaling
In this study, we aimed to investigate the potential anti-proliferative and pro-apoptotic activities of SNG in a panel of MM cell lines (U266, IM9, MM1S, and RPMI-8226). SNG treatment of MM cells resulted in a dose-dependent decrease in cell viability through mitochondrial membrane potential loss and activation of caspase 3, 9, and cleavage of PARP. Pre-treatment of MM cells with a universal caspase inhibitor, Z-VAD-FMK, prevented SNG mediated loss of cell viability, apoptosis, and caspase activation, confirming that SNG-mediated apoptosis is caspase-dependent. The SNG-mediated apoptosis appears to be resulted from suppres...
Source: Frontiers in Oncology - April 16, 2019 Category: Cancer & Oncology Source Type: research

Gambogic Acid Inhibits Malignant Melanoma Cell Proliferation Through Mitochondrial p66shc/ROS-p53/Bax-Mediated Apoptosis
Conclusion: Results provided novel preclinical insights into the chemotherapeutic use of GA by highlighting the importance of p66shc/ROS-p53/Bax pathways in the antitumor effect of GA in malignant melanoma.Cell Physiol Biochem 2016;38:1618-1630
Source: Cellular Physiology and Biochemistry - April 27, 2016 Category: Cytology Source Type: research

Evaluation of HO-1 expression, cellular ROS production, cellular proliferation and cellular apoptosis in human esophageal squamous cell carcinoma tumors and cell lines.
Authors: Ren QG, Yang SL, Hu JL, Li PD, Chen YS, Wang QS Abstract Patients with esophageal squamous cell carcinoma (ESCC) have a poor prognosis. However, the related mechanisms are unclear, thus we investigated the expression of HO-1 in ESCC tissue and explored possible mechanisms of tumor progression. Expression of HO-1 was examined by immunohistochemistry in 143 ESCC tumors. The correlation of HO-1 with clinicopathological characteristics was also examined. Two human ESCC cell lines, TE-13 and Eca109 were studied. Silencing of cell line HO-1 by specific small interfering RNA (siRNA) was evaluated using real-time...
Source: Oncology Reports - January 21, 2016 Category: Cancer & Oncology Tags: Oncol Rep Source Type: research

Effect of hypoxia on the expression of ¿B-crystallin in head and neck squamous cell carcinoma
Conclusions: We provide the first evidence that hypoxia stimulates upregulation of αB-crystallin in HNSCC. This upregulation was not caused by the low oxygen pressure, but more likely by ROS formation. The higher expression of αB-crystallin may lead to prolonged survival of these cells under hypoxic conditions.
Source: BMC Cancer - April 11, 2014 Category: Cancer & Oncology Authors: Chantal van de SchootbruggeElisabeth SchultsJohan BussinkPaul SpanReidar GrénmanGer PruijnJohannes KaandersWilbert Boelens Source Type: research

Effect of hypoxia on the expression of alphaB-crystallin in head and neck squamous cell carcinoma
Conclusions: We provide the first evidence that hypoxia stimulates upregulation of alphaB-crystallin in HNSCC. This upregulation was not caused by the low oxygen pressure, but more likely by ROS formation. The higher expression of alphaB-crystallin may lead to prolonged survival of these cells under hypoxic conditions.
Source: BMC Cancer - April 11, 2014 Category: Cancer & Oncology Authors: Chantal van de SchootbruggeElisabeth SchultsJohan BussinkPaul SpanReidar GrénmanGer PruijnJohannes KaandersWilbert Boelens Source Type: research

Proopiomelanocortin gene delivery induces apoptosis in melanoma through NADPH oxidase 4-mediated ROS generation.
In this study, we characterize the involvement of hypoxia and reactive oxygen species (ROS) generation in the antineoplastic mechanism of proopiomelanocortin (POMC) gene delivery in a mouse B16-F10 melanoma model in vivo and in vitro. Histological analysis revealed increased TUNEL-positive cells and enhanced hypoxic activities in melanoma treated with adenovirus encoding POMC (Ad-POMC) but not control vector. Because the apoptotic cells were detected mainly in regions distant from blood vessels, it was hypothesized that POMC therapy might render melanoma cells vulnerable to hypoxic insult. Using a hypoxic chamber or cobalt...
Source: Free Radical Biology and Medicine - January 8, 2014 Category: Biology Authors: Liu GS, Wu JC, Tsai HE, Dusting GJ, Chan EC, Wu CS, Tai MH Tags: Free Radic Biol Med Source Type: research