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Thioredoxin reductase-1 levels are associated with NRF2 pathway activation and tumor recurrence in non-small cell lung cancer
Free Radic Biol Med. 2021 Oct 19;177:58-71. doi: 10.1016/j.freeradbiomed.2021.10.020. Online ahead of print.ABSTRACTActivating mutations in the KEAP1/NRF2 pathway characterize a subset of non-small cell lung cancer (NSCLC) associated with chemoresistance and poor prognosis. We herein evaluated the relationship between 64 oxidative stress-related genes and overall survival data from 35 lung cancer datasets. Thioredoxin reductase-1 (TXNRD1) stood out as the most significant predictor of poor outcome. In a cohort of NSCLC patients, high TXNRD1 protein levels correlated with shorter disease-free survival and distal metastasis-...
Source: Free Radical Biology and Medicine - October 21, 2021 Category: Biology Authors: Marina Delgobo Ros ângela Mayer Gonçalves Marco Ant ônio Delazeri Marcelo Falchetti Alessandro Zandon á Raquel Nascimento das Neves Karoline Almeida Adriane Cristina Fagundes Daniel Pens Gelain Jo ão Isidro Fracasso Guilherme Baroni de Mac êdo Leona Source Type: research

Employing siRNA tool and its delivery platforms in suppressing cisplatin resistance: Approaching to a new era of cancer chemotherapy
Publication date: Available online 28 March 2021Source: Life SciencesAuthor(s): Sepideh Mirzaei, Mohammad Hossein Gholami, Farid Hashemi, Amirhossein Zabolian, Kiavash Hushmandi, Vahid Rahmanian, Maliheh Entezari, Yarabahally R. Girish, Kothanahally S. Sharath Kumar, Amir Reza Aref, Pooyan Makvandi, Milad Ashrafizadeh, Ali Zarrabi, Haroon Khan
Source: Life Sciences - March 29, 2021 Category: Biology Source Type: research

Decreasing Arl4c expression by inhibition of AKT signal in human lung adenocarcinoma cells
ConclusionHere, we highlighted the AKT pathway as an important regulatory pathway for Arl4c expression in lung cancer cells and identified HCPT as a promising drug for lung adenocarcinoma treatment that functioned by targeting Arl4c expression.
Source: Life Sciences - February 13, 2020 Category: Biology Source Type: research

Dihydroartemisinin inhibits endothelial cell tube formation by suppression of the STAT3 signaling pathway
Publication date: Available online 24 December 2019Source: Life SciencesAuthor(s): Peng Gao, Li-li Wang, Jing Liu, Fengyun Dong, Wei Song, Lin Liao, Bei Wang, Wenqian Zhang, Xia Zhou, Qi Xie, Rong Sun, Ju LiuAbstractAimsEndothelial cell (EC) tube formation is crucial for tumor angiogenesis, which becomes a target for chemotherapy. The anti-malaria agent dihydroartemisinin (DHA) inhibited tumor growth and angiogenesis. The aim of this study was to investigate the effects of DHA on EC tube formation and the underlying mechanisms.Materials and methodsHuman umbilical vein endothelial cells (HUVECs) were cultured with different...
Source: Life Sciences - December 26, 2019 Category: Biology Source Type: research

Cisplatin resistance involves a metabolic reprogramming through ROS and PGC-1 α in NSCLC which can be overcome by OXPHOS inhibition.
CONCLUSION: These results describe a new cisplatin resistance mechanism in NSCLC based on a metabolic reprogramming that is therapeutically exploitable through PGC-1α downregulation or OXPHOS inhibitors. PMID: 30880247 [PubMed - as supplied by publisher]
Source: Free Radical Biology and Medicine - March 13, 2019 Category: Biology Authors: Cruz-Bermúdez A, Laza-Briviesca R, Vicente-Blanco RJ, García-Grande A, Coronado MJ, Laine-Menéndez S, Palacios-Zambrano S, Moreno-Villa MR, Ruiz-Valdepeñas AM, Lendinez C, Romero A, Franco F, Calvo V, Alfaro C, Acosta PM, Salas C, Garcia JM, Provencio Tags: Free Radic Biol Med Source Type: research

CQ synergistically sensitizes human colorectal cancer cells to SN-38/CPT-11 through lysosomal and mitochondrial apoptotic pathway via p53-ROS cross-talk.
In this study, we found the chemotherapy agent SN-38 induced autophagy in colorectal cancer (CRC) cells. However, inhibition of autophagy using a small molecular inhibitor 3-methyladenine (3-MA) and ATG5 siRNA did not increase SN-38-induced cytotoxicity in CRC cells. Notably, another autophagy inhibitor chloroquine (CQ) synergistically enhanced the anti-tumor activity of SN-38 in CRC cells with wild type (WT) p53. Subsequently, we identified a potential mechanism of this cooperative interaction by showing that CQ and SN-38 acted together to trigger reactive oxygen species (ROS) burst, upregulate p53 expression, elicit the ...
Source: Free Radical Biology and Medicine - January 24, 2017 Category: Biology Authors: Chen P, Luo X, Nie P, Wu B, Xu W, Shi X, Chang H, Li B, Yu X, Zou Z Tags: Free Radic Biol Med Source Type: research

Resveratrol induces intracellular Ca2+ rise via T-type Ca2+ channels in a mesothelioma cell line
This study was designed to determine whether Res affects Ca2+ signaling in cancer cells. Main methods We used the REN human mesothelioma cell line, as an in vitro cancer cell model, and the non-malignant human mesothelial MeT5A cell line, as normal cell model. Cytosolic Ca2+ concentration was measured by the fluorescent indicator Fura-2. Immunofluorescence, Western blot, and siRNA technique were employed to assess the involvement of T-type Ca2+ channels. Cell viability was determined by the calcein assay. Key findings REN cells transiently exposed to 1–10μM Res showed increasing peaks of Ca2+ that were absent in Ca2+-...
Source: Life Sciences - February 1, 2016 Category: Biology Source Type: research

UCP2 inhibition sensitizes breast Cancer cells to therapeutic agents by increasing oxidative stress.
In conclusion, UCP2 could be a therapeutic target in breast cancer, especially in those patients treated with tamoxifen. PMID: 25960046 [PubMed - as supplied by publisher]
Source: Free Radical Biology and Medicine - May 7, 2015 Category: Biology Authors: Pons DG, Nadal-Serrano M, Torrens-Mas M, Valle A, Oliver J, Roca P Tags: Free Radic Biol Med Source Type: research

Lysophosphatidate signaling stabilizes Nrf2 and increases the expression of genes involved in drug resistance and oxidative stress responses: implications for cancer treatment Research Communication
This study provides the first evidence that LPA increases antioxidant gene and multidrug-resistant transporter expression. Blocking this aspect of LPA signaling provides a novel strategy for improving chemotherapy.—Venkatraman, G., Benesch, M. G. K., Tang, X., Dewald, J., McMullen, T. P. W., Brindley, D. N. Lysophosphatidate signaling stabilizes Nrf2 and increases the expression of genes involved in drug resistance and oxidative stress responses: implications for cancer treatment.
Source: FASEB Journal - March 2, 2015 Category: Biology Authors: Venkatraman, G., Benesch, M. G. K., Tang, X., Dewald, J., McMullen, T. P. W., Brindley, D. N. Tags: Research Communication Source Type: research

Oxaliplatin activates the KEAP1/NRF2 antioxidant system conferring protection against the cytotoxicity of anticancer drugs.
Abstract Oxaliplatin is an important drug in the treatment of advanced metastatic colorectal cancer. NF-E2 P45-related factor 2 (NRF2) is a key transcription factor that controls genes encoding cytoprotective and detoxifying enzymes through antioxidant response elements (AREs) in their regulatory regions. Here, we report that oxaliplatin is an activator of the NRF2 signaling pathway, with up-regulation of ARE-driven genes and glutathione elevation. An injection of oxaliplatin into mice enhanced the expression of glutathione transferases and antioxidant enzymes in the small and large intestines of wild-type (WT) mi...
Source: Free Radical Biology and Medicine - February 17, 2014 Category: Biology Authors: Wang XJ, Li Y, Luo L, Wang H, Chi Z, Xin A, Li X, Wu J, Tang X Tags: Free Radic Biol Med Source Type: research