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Carcinogen - Crossref

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Last Updated: 10 November 2022

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Live or Heat-Killed Lactobacillus rhamnosus Aerosolization Decreases Adenomatous Lung Cancer Development in a Mouse Carcinogen-Induced Tumor Model

In a mouse carcinogen-induced tumor model, we investigate if disrupting lung microbiota, which contribute to immunosuppression, by antibiotics or probiotic aerosol interferes with lung cancer formation. High levels of J chain mRNA and good prognosis in lung adenocarcinoma patients, who were correlated with elevated B and CD4 T cells, as well as reduced Tregs and M2 macrophages, according to the Kaplanu2013Meier plotter. This report reveals the L. RGG aerosol efficacy in slowing lung cancer growth by boosting local immunity and points to this non-invasive approach to treat people at risk of lung cancer.

Source link: https://doi.org/10.3390/ijms232112748


Comparative Study of Binding Pockets in Human CYP1A2, CYP3A4, CYP3A5, and CYP3A7 with Aflatoxin B1, a Hepato-Carcinogen, by Molecular Dynamics Simulation & Principal Component Analysis

Due to cooperation, the rate of metabolic reactions in CYP1A2 and CYP3A4 rises in CYP1A2 and CYP3A4 among more than two sites of proteins to produce two products at a time, but the interaction of CYP3A5 and CYP3A7 remains unclear, according to the literature. Our research aims to investigate these four enzymes with AFB1 based on binding site pocket analysis and to identify the most likely resultant products at each binding site. Conclusion: A better metabolites may be expected in the fetus, where AFB1 is metabolized only by CYP3A7, will be expected, while in adults exhibiting CYP1A2, CYP3A4 and CYP3A5 can raise the incidence of the toxic metabolites, thus increasing liver toxicity. We believe that AFB1 binding characteristics would be helpful to medicinal chemists in the process of synthesising a new drug.

Source link: https://doi.org/10.2174/1389200223666220718161754


Oleo-furan surfactants as fully biorenewable, carcinogen-free drop-in replacements for commercial anionic surfactants

Customers are experiencing the highest production volumes concentrated on various surfactants due to the commercial production of anionic surfactants, which provide the foaming and soil removal properties consumers have come to love in their cleaning and personal care products. Sironix Renewables' crude sulfonate surfactants deliver a completely biorenewable anionic surfactant alternative without the carcinogenic byproducts, with results in application testing that rivals or exceeds that of LAS and SLES, particularly in challenging application conditions such as with hard water. With a comparison to commercial anionic surfactants, we offer an overview of the characteristics of oleo-furans surfactants and a closer glance at how costs and carbon emissions can be reduced by their replacement.

Source link: https://doi.org/10.21748/avmo1700


Gene Expression over Time during Cell Transformation Due to Non-Genotoxic Carcinogen Treatment of Bhas 42 Cells

The Bhas 42 cell transformation assay is the first organization for Economic Cooperation and Development to have a recognized method for the investigation of tumor-promoting chemicals, including non-genotoxic carcinogens, as distinct from genotoxic carcinogens. Since the v-Has gene was transformed into a mouse fibroblast cell line, a key benefit of using the Bhas 42 CTA in the research of tumor-promoting enzymes, including non-genotoxic carcinogens, is that the cell-transformation potential of the chemical can be determined directly without treatment with a tumor-initiating drug. Pathways that were enabled or inactivated during cell transformation in the Bhas 42 cells treated with TPA were not limited only to RAS but also to several pathways in the hallmarks of cancer.

Source link: https://doi.org/10.3390/ijms23063216


IN SILICO EVIDENCE OF THE EFFICACY OF PHYTOCOMPONENTS AS COMPETITIVE INHIBITORS AGAINST A TOBACCO SMOKE CARCINOGEN IN NON-SMALL CELL LUNG CANCER

Cigarette smoke is a significant risk factor in the formation of Non-small cell lung cancer. Nicotine-derived nitrosamine ketone is a key carcinogen present in cigarette smoke that leads to tumor metastasis by the induction of a protein kinase cascade, including Focal adhesion kinase. As docking device for investigating the interaction of the protein active site residues with the phytocomponents, the Molegro virtual docker and Hex software was used. Both the Molegro molecular viewer and the Biovia Discovery studio 2017 R2 visualizer were used to determine amino acid interactions between phytocomponents and protein, as well as binding scores. To obtain the binding energy of this carcinogen with the protein, the binding energy of this carcinogen was also obtained by molecular interaction of NNK with the target protein. In comparison, NNK had a lower binding score with FAK than FAK. Rosmarinic acid derivatives can be useful competitive bindingers in nicotine-absorbent NSCLC patients.

Source link: https://doi.org/10.56588/iabcd.v1i2.46


Upregulation of Circ_0035266 Contributes to the Malignant Progression of Inflammation-Associated Malignant Transformed Cells Induced by Tobacco-Specific Carcinogen NNK

Abstract: Cigarette smoking-induced chronic inflammation has been identified as a primary cause of lung tumor formation. Both 4--1--1-butanone, a tobacco-specific carcinogen, and lipopolysaccharide, a inflammatory inducer, are key components of tobacco smoke, which have been implicated in inflammation-driven carcinogenesis. For short- or long-term periods, the BEAS-2B human bronchial epithelial cells were exposed to NNK, LPS, or both. In NNK-treated BEAS-2B cells, we discovered that acute LPS exposure aided in the discovery of granulocyte-macrophage colony stimulating factor and interleukin -6. In addition, regular LPS exposure aided in the NNK-induced malignant transformation process by encouraging cell proliferation, cell cycle change, migration, and clonal formation. Previously, we determined that circular RNA circ_0035266 enhanced cell inflammation in response to NNK + LPS by sponging miR-181d-5p and limiting the expression of its downstream target DEAD-Box Helicase 3 X-Linked.

Source link: https://doi.org/10.1093/toxsci/kfac072


The liver fluke Opisthorchis felineus as a group III or group I carcinogen

Opisthorchiasis caused by liver fluke Opisthorchis felineus is one of the most common helminthic infections in the Russian Federation. In addition to the European part of Russia and in the regions of Western and Eastern Europe, opisthorchiasis have populated. O. felineus is included in Group 3 of biological carcinogens, but it is not considered carcinogenic to humans by the government. Studies on the carcinogenic effects of this liver fluke and the epidemiology of cholangiocarcinoma in the Russian Federation have both started in earnest quite recently. Despite this, we have some evidence that O. felineus infection leads to a precancerous state of the bile duct epithelium. This research will help clarify the carcinogenicity of O. felineus to humans, as well as experimental results on opisthorchiasis felinea.

Source link: https://doi.org/10.1051/fopen/2019016


Control of alveolar macrophage differentiation by Siah1a/2 ubiquitin ligases limits carcinogen-induced lung adenocarcinoma

AMs enriched their immature state thanks to increased pro-tumorigenic and inflammatory gene signatures and a slew of Siah1a/2 substrates NRF2 and u03b2-catenin. In urethane-treated mice harboring Siah1a/2 ablated macrophages, the development of more frequent and larger lung tumors was observed in lung fibrosis, as well as control macrophages. Siah1a/2 as the gatekeepers of cancer progression by controlling AM differentiation and profibrotic phenotypes contributing to carcinogen-induced lung cancer.

Source link: https://doi.org/10.1101/2022.09.14.508032


A novel mouse model of sporadic colon cancer induced by combination of conditional Apc genes and chemical carcinogen in the absence of Cre recombinase

Human colon cancer cell lines and primary colonic tissues, as well as animal studies using human colon cancer xenografts and immunecompetent mouse models of spontaneously or chemically induced colon cancer improve phenocopy human disease. As the majority of sporadic human colon tumors have adenomatous polyposis coli gene mutations, a considerable effort has been put into breeding mice that express mutant Apc alleles that mimic human colon cancer pathogenesis. Unlike the azoxymethane-resistant mice with conditional Apc expression but lacking the Cre recombinase gene, almost 50% tumor incidence in mice with two or two large colon tumors per mouse of human-like histology was found, but no small intestinal tumors were observed.

Source link: https://doi.org/10.1093/carcin/bgz050

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions