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Nutrition: Copper

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Total 25 results found since Jan 2013.

CYP2E1 triggered GRP78/ATF6/CHOP signalling axis inhibit apoptosis and promotes progression of hepatocellular carcinoma
Arch Biochem Biophys. 2023 Jul 25:109701. doi: 10.1016/j.abb.2023.109701. Online ahead of print.ABSTRACTHepatocellular carcinoma (HCC) is the leading cause of cancer-related death worldwide. Cytochrome P450 2E1 (CYP2E1) is an enzyme, primarily involved in the metabolism of xenobiotics and procarcinogens. The present study was designed to investigate the potential role of CYP2E1 triggered endoplasmic reticulum stress in the progression of HCC through inhibition of apoptosis. In vitro CYP2E1 promotes HepG2 cell migration, reduced chromatin condensation, enhanced intracellular ROS accumulation and induce cell cycle progressio...
Source: Archives of Biochemistry and Biophysics - July 27, 2023 Category: Biochemistry Authors: Sharmeen Ishteyaque Karan Singh Yadav Smriti Verma Kaveri R Washimkar Madhav Nilakanth Mugale Source Type: research

DLAT as a Cuproptosis Promoter and a Molecular Target of Elesclomol in Hepatocellular Carcinoma
ConclusionCuproptosis and DLAT as a promising biomarker could help to determine the prognosis of HCC and may offer novel insights for effective treatment.
Source: Journal of Huazhong University of Science and Technology -- Medical Sciences -- - June 8, 2023 Category: Research Source Type: research

Lead exposure disturbs ATP7B-mediated copper export from brain barrier cells by inhibiting XIAP-regulated COMMD1 protein degradation
In conclusion, Pb exposure can reduce XIAP protein expression, increase COMMD1 protein levels, and specifically decrease ATP7B protein levels, resulting in Cu accumulation in brain barrier cells.PMID:37027943 | DOI:10.1016/j.ecoenv.2023.114861
Source: Ecotoxicology and Environmental Safety - April 7, 2023 Category: Environmental Health Authors: Yang Liu Zai-Hua Zhao Tao Wang Jin-Yu Yao Wen-Qing Wei Li-Hong Su Shuang-Shuang Tan Zi-Xuan Liu Han Song Jing-Yuan Chen Wei Zheng Wen-Jing Luo Gang Zheng Source Type: research

Silencing of proinflammatory NF- κB and inhibition of herpes simplex virus (HSV) replication by ultrasmall gold nanoparticles (2 nm) conjugated with small-interfering RNA
Nanoscale Adv. 2022 Sep 5;4(21):4502-4516. doi: 10.1039/d2na00250g. eCollection 2022 Oct 25.ABSTRACTAzide-terminated ultrasmall gold nanoparticles (2 nm gold core) were covalently functionalized with alkyne-terminated small-interfering siRNA duplexes by copper-catalyzed azide-alkyne cycloaddition (CuAAC; click chemistry). The nanoparticle core was visualized by transmission electron microscopy. The number of attached siRNA molecules per nanoparticle was determined by a combination of atomic absorption spectroscopy (AAS; for gold) and UV-Vis spectroscopy (for siRNA). Each nanoparticle carried between 6 and 10 siRNA duplex m...
Source: Herpes - November 7, 2022 Category: Infectious Diseases Authors: Natalie Wolff Sebastian Kollenda Kai Klein Kateryna Loza Marc Heggen Leonie Brochhagen Oliver Witzke Adalbert Krawczyk Ingrid Hilger Matthias Epple Source Type: research

Effective Delivery of siRNA-Loaded Nanoparticles for Overcoming Oxaliplatin Resistance in Colorectal Cancer
Chemotherapy resistance represents a formidable obstacle in advanced or metastatic colorectal cancer (CRC) patients. It is reported that ATPase copper transporting alpha (ATP7A) plays an important role in chemotherapy resistance in CRC. Here, we identified ATP7A as a potentially key gene of OXA resistance in CRC. The patients with higher expression of ATP7A tended to have platinum drug resistance. While the lower expression of ATP7A by siRNA knockdown resulted in enhancement of OXA sensitivity and increased OXA-induced apoptosis. Further, we demonstrated a novel and safe strategy to increase CRC chemosensitivity by deliver...
Source: Frontiers in Oncology - February 21, 2022 Category: Cancer & Oncology Source Type: research

The anti-melanogenic effects of ellagic acid through induction of autophagy in melanocytes and suppression of UVA-activated α-MSH pathways via Nrf2 activation in keratinocytes.
In conclusion, ellagic acid is an effective skin-whitening agent and might be used as a topical applicant. PMID: 33545118 [PubMed - as supplied by publisher]
Source: Biochemical Pharmacology - February 2, 2021 Category: Drugs & Pharmacology Authors: Yang HL, Lin CP, Vudhya Gowrisankar Y, Huang PJ, Chang WL, Shrestha S, Hseu YC Tags: Biochem Pharmacol Source Type: research

RNAi-mediated knockdown of the dopamine beta-hydroxylase gene changes growth of razor clams.
Abstract Dopamine beta-hydroxylase (DβH) plays an essential role in the synthesis of catecholamines (CA) in neuroendocrine networks. In the razor clam, Sinonovacula constricta a novel gene for DβH (ScDβH-α) was identified that belongs to the copper type II ascorbate-dependent monooxygenase family. Expression analysis revealed ScDβH-α gene transcripts were abundant in the liver and expressed throughout development. Knock-down of ScDβH-α in adult clams using siRNA caused a reduction in the growth rate compared to control clams. Reduced growth was associated with strong down-regulation of gene transcripts for...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - November 5, 2020 Category: Biochemistry Authors: Li Z, Peng M, Power DM, Niu D, Zhiguo D, Jiale L Tags: Comp Biochem Physiol B Biochem Mol Biol Source Type: research

Dopamine beta-hydroxylase and its role in regulating the growth and larval metamorphosis in Sinonovacula constricta.
Abstract Dopamine beta-hydroxylase (DβH) plays a key role in the synthesis of catecholamines (CAs) in the neuroendocrine regulatory network. The DβH gene was identified from the razor clam Sinonovacula constricta and referred to as ScDβH. The ScDβH gene is a copper type II ascorbate-dependent monooxygenase with a DOMON domain and two Cu2_monooxygen domains. ScDβH transcript expression was abundant in liver and hemolymph. During early development, ScDβH expression significantly increased at the umbo larval stage. Furthermore, the inhibitors and siRNA of DβH were screened. After challenge with DβH inhibitor,...
Source: Gene - January 28, 2020 Category: Genetics & Stem Cells Authors: Li Z, Niu D, Peng M, Xiong Y, Ji J, Dong Z, Li J Tags: Gene Source Type: research

Antitumor effects of disulfiram/copper complex in the poorly-differentiated nasopharyngeal carcinoma cells via activating ClC-3 chloride channel
Publication date: December 2019Source: Biomedicine & Pharmacotherapy, Volume 120Author(s): Xiao Xu, Jingkui Xu, Chongyu Zhao, Xiuying Hou, Mengjia Li, Liwei Wang, Lixin Chen, Yehui Chen, Linyan Zhu, Haifeng YangAbstractThe enhancement of the anticancer activity by disulfiram (DSF) chelated with copper (DSF/Cu2+) has been investigated recently, while the underlying molecular mechanisms still need to be fully elucidated. Chloride channel-3 (ClC-3) is over-expressed in a variety of cancers and involves multiple tumor biological events. However, whether the over-expression of ClC-3 in tumor cells affects the sensitivity of ant...
Source: Biomedicine and Pharmacotherapy - October 12, 2019 Category: Drugs & Pharmacology Source Type: research

Antitumor effects of disulfiram/copper complex in the poorly-differentiated nasopharyngeal carcinoma cells via activating ClC-3 chloride channel.
Abstract The enhancement of the anticancer activity by disulfiram (DSF) chelated with copper (DSF/Cu2+) has been investigated recently, while the underlying molecular mechanisms still need to be fully elucidated. Chloride channel-3 (ClC-3) is over-expressed in a variety of cancers and involves multiple tumor biological events. However, whether the over-expression of ClC-3 in tumor cells affects the sensitivity of anti-tumor drugs remains unclear. Here, we showed that the involvement of ClC-3 chloride channel in the selective cytotoxicity of DSF/Cu2+ in the poorly-differentiated nasopharyngeal carcinoma. The EC50 o...
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - October 9, 2019 Category: Drugs & Pharmacology Authors: Xu X, Xu J, Zhao C, Hou X, Li M, Wang L, Chen L, Chen Y, Zhu L, Yang H Tags: Biomed Pharmacother Source Type: research

Novel Interaction of Antioxidant-1 with TRAF4: Role in Inflammatory Responses in Endothelial Cells.
We reported that in proinflammatory cytokine TNFa-stimulated endothelial cells (ECs), cytosolic Cu chaperone Atox1 functions as a Cu-dependent transcription factor for NOX organizer p47phox, thereby increasing ROS-dependent inflammatory gene expression. However, the role and mechanism of Atox1 nuclear translocation in inflamed ECs remain unclear. Using enface staining and nuclear fractionation, here we show that Atox1 was localized in the nucleus in inflamed aortas from ApoE-/- mice with Angiotensin II infusion on a high fat diet, while it was found in cytosol in those from control mice. In cultured human ECs, TNFα stimul...
Source: Am J Physiol Cell Ph... - September 24, 2019 Category: Cytology Authors: Das A, Sudhahar V, Ushio-Fukai M, Fukai T Tags: Am J Physiol Cell Physiol Source Type: research

Hemoglobin S Induces Exposure of Red Blood Cell Membrane Skeleton Microdomains Bearing Mannose That Stimulate Phagocytosis By Macrophages: A Molecular Basis for Hemolysis in Sickle Cell Disease but Protection Against Plasmodium Falciparum malaria
Heterozygosity for Hemoglobin (Hb) S, sickle cell trait (SCT), affects over 40 million people and confers resistance to severe infection by Plasmodium falciparum. Homozygosity for HbS, or compound heterozygosity with certain other alleles of Hb, affects over 4 million individuals and causes sickle cell disease (SCD). Hemolytic anaemia is a prominent feature of SCD and is mainly extravascular, mediated by hepatic and splenic macrophages. No ligands for this process have been identified. As many macrophage phagocytic receptors recognise carbohydrates, we surveyed surface glycan expression by sickle cells using a panel of 8 l...
Source: Blood - November 21, 2018 Category: Hematology Authors: Cao, H., Wassall, H. J., Forrester, M. A., Hall, L. S., Wilson, H. M., Shepherd, J., Patel, B., Masson, A., Henderson, S., Konieczny, G., Beverly, M., Tampakis, D., Antonopoulos, A., Haslam, S. M., Dell, A., Rowe, A. J., Brewin, J., Rees, D. C., Barker, R Tags: 113. Hemoglobinopathies, Excluding Thalassemia-Basic and Translational Science: Poster III Source Type: research