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Nicotine Receptors cancer

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https://www.readbyqxmd.com/read/29215705/activation-of-fibroblasts-by-nicotine-promotes-the-epithelial-mesenchymal-transition-and-motility-of-breast-cancer-cells
#1
Pin-Cyuan Chen, Wen-Ying Lee, Hsiang-Hsi Ling, Chia-Hsiung Cheng, Ku-Chung Chen, Cheng-Wei Lin
The tumor microenvironment plays an important role in tumor initiation and progression. It is well documented that nicotine participates in cigarette smoking-related malignancies. Previous studies focused on the effects of nicotine on tumor cells; however, the role of the microenvironment in nicotine-mediated tumorigenesis is poorly understood. Herein, we investigated the effect and molecular mechanism of nicotine on fibroblasts and its contribution to breast cancer. We found that nicotine induced the epithelial-mesenchymal transition (EMT) of breast cancer cells and promoted activation of fibroblasts...
December 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29193083/integrating-expression-related-snps-into-genome-wide-gene-pathway-based-analysis-identified-novel-lung-cancer-susceptibility-genes
#2
Yuzhuo Wang, Weibing Wu, Meng Zhu, Cheng Wang, Wei Shen, Yang Cheng, Liguo Geng, Zhihua Li, Jiahui Zhang, Juncheng Dai, Hongxia Ma, Liang Chen, Zhibin Hu, Guangfu Jin, Hongbing Shen
Traditional pathway analysis map single nucleotide polymorphisms (SNPs) to genes according to physical position, which lacks sufficient biological bases. Here we incorporated genetics of gene expression into gene and pathway based analysis to identify genes and pathways associated with lung cancer risk. We identified expression related SNPs (eSNPs) in lung tissues and integrated these eSNPs into three lung cancer genome wide association studies (GWASs), including 12,843 lung cancer cases and 12,639 controls...
November 30, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29190774/activation-of-the-cholinergic-anti-inflammatory-pathway-by-gts-21-attenuates-cisplatin-induced-acute-kidney-injury-in-mice
#3
Prodyot K Chatterjee, Michael M Yeboah, Malvika H Solanki, Gopal Kumar, Xiangying Xue, Valentin A Pavlov, Yousef Al-Abed, Christine N Metz
Acute kidney injury (AKI) is the most common side effect of cisplatin, a widely used chemotherapy drug. Although AKI occurs in up to one third of cancer patients receiving cisplatin, effective renal protective strategies are lacking. Cisplatin targets renal proximal tubular epithelial cells leading to inflammation, reactive oxygen species, tubular cell injury, and eventually cell death. The cholinergic anti-inflammatory pathway is a vagus nerve-mediated reflex that suppresses inflammation via α7 nicotinic acetylcholine receptors (α7nAChRs)...
2017: PloS One
https://www.readbyqxmd.com/read/29172281/snp-rs16969968-as-a-strong-predictor-of-nicotine-dependence-and-lung-cancer-risk-in-a-north-indian-population
#4
Namita Pandey, Soumyadip Pal, Lokesh Kumar Sharma, Randeep Guleria, Anant Mohan, Tapasya Srivastava
Background: The 15q24-25 loci contain genes (CHRNA5 and CHRNA3) encoding nicotinic acetylcholine receptor subunits. We here determined for the first time the association of genetic variants rs16969968 and rs3743074 in CHRNA5 and CHRNA3, respectively, on nicotine dependence and lung cancer risk in a North Indian population by a case-control approach. Methods: Venous blood samples were obtained from 324 participants (108 lung cancer patients and 216 healthy individuals). DNA was extracted and PCR amplified with primers flanking the SNPs rs16969968 and rs3743074...
November 26, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29163048/nicotinic-acetylcholine-receptor-subtype-alpha-9-mediates-triple-negative-breast-cancers-based-on-a-spontaneous-pulmonary-metastasis-mouse-model
#5
Li-Chi Huang, Ching-Ling Lin, Jia-Zheng Qiu, Chun-Yu Lin, Kai-Wen Hsu, Ka-Wai Tam, Jung-Yu Lee, Jinn-Moon Yang, Chia-Hwa Lee
Triple-negative breast cancer (TNBC) subtype is associated with poor prognosis and a high risk of recurrence-related death in women. Despite the aggressiveness of TNBCs, targeted TNBC therapy is not yet available in the clinic. To overcome this challenge, we generated highly metastatic TNBC cells (LM) derived from metastasized lung cells via a serial spontaneous pulmonary metastasis animal model to identify targetable molecules for attenuating the progression of TNBC metastasis. Gene analysis of primary tumor (P), first-round (1LM) and second-round (2LM) metastasized lung cells revealed that mesenchymal-related genes were significantly expressed in LM cells, especially in 2LM cells...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29162511/the-thymidylate-synthase-enhancer-region-tser-polymorphism-increases-the-risk-of-thymic-lymphoid-hyperplasia-in-patients-with-myasthenia-gravis
#6
Angela Lopomo, Roberta Ricciardi, Anna De Rosa, Melania Guida, Michelangelo Maestri, Marco Lucchi, Franca Melfi, Alfredo Mussi, Lucia Migliore, Fabio Coppedè
BACKGROUND: Myasthenia Gravis (MG) is caused, in approximately 80% of the patients, by autoantibodies against the nicotinic acetylcholine receptor (AChR). The disease is often associated with pathological changes of the thymus: thymic epithelial tumours are present in about 10-20% of the patients, while up to 80% of the patients with early disease onset have thymic hyperplasia. Folate metabolism is required for the production of DNA precursors and for proper DNA methylation reactions, and impaired folate metabolism has been often associated with cellular growth and cancer...
November 18, 2017: Gene
https://www.readbyqxmd.com/read/29131336/molecular-function-of-%C3%AE-7-nicotinic-receptors-as-drug-targets
#7
Cecilia Bouzat, Matías Lasala, Beatriz Elizabeth Nielsen, Jeremías Corradi, María Del Carmen Esandi
Nicotinic acetylcholine receptors (nAChR) are pentameric ligand-gated ion channels involved in many physiological and pathological processes. In vertebrates, there are seventeen different nAChR subunits that combine to yield a variety of receptors with different pharmacology, function, and localization. The homomeric α7 receptor is one of the most abundant nAChRs in the nervous system and it is also present in non-neuronal cells. It plays important roles in cognition, memory, pain, neuroprotection, and inflammation...
November 13, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29126755/-cannabis-and-lung-what-we-know-and-everything-we-don-t-know-yet
#8
REVIEW
T Urban, J Hureaux
Cannabis use increased sharply from 2010 to 2014 in France. Cannabis is often consumed with tobacco, although the use of marijuana is developing. Tobacco and cannabis smoke have many common characteristics in terms of irritants, carcinogens and carbon monoxide. They also differentiate by their dependence mechanisms, with nicotine and its receptors for tobacco and tetra-hydro-cannabinol (THC) and its specific receptors for cannabis. Chronic inhalation (700,000 daily users in France) over a long period most likely increases the relative risk of bronchial cancer...
November 7, 2017: Revue de Pneumologie Clinique
https://www.readbyqxmd.com/read/29117258/lung-epithelial-response-to-cigarette-smoke-and-modulation-by-the-nicotinic-alpha-7-receptor
#9
Lorise C Gahring, Elizabeth J Myers, Diane M Dunn, Robert B Weiss, Scott W Rogers
Cigarette smoking (CS) is a principal contributor to a spectrum of devastating lung diseases whose occurrence and severity may vary between individuals and not appear for decades after prolonged use. One explanation for the variability and delay in disease onset is that nicotine, the addictive component of CS, acts through the ionotropic nicotinic acetylcholine receptor (nAChR) alpha7 (α7) to modulate anti-inflammatory protection. In this study we measured the impact α7 signaling has on the mouse distal lung response to side-stream CS exposure for mice of the control genotype (α7G) and those in which the α7-receptor signaling mechanisms are restricted by point mutation (α7E260A:G)...
2017: PloS One
https://www.readbyqxmd.com/read/29100274/nicotine-induces-ep4-receptor-expression-in-lung-carcinoma-cells-by-acting-on-ap-2%C3%AE-the-intersection-between-cholinergic-and-prostanoid-signaling
#10
Yu Fan, Ke Wang
It was demonstrated that nicotine increased non-small cell lung cancer cell proliferation through nicotinic acetylcholine receptor -mediated signals. However, the detailed mechanism remains incompletely understood. We evaluated whether nicotine increased EP4 receptor expression in lung carcinoma cells by activating on AP-2α. METHODS: The non-small cell lung cancer cells of A549 and H1838 were cultured and treated with EP4 inhibitor AH23848, also with EP4 and control siRNAs. The extracellular signal-regulated kinases inhibitor PD98059, the p38 mitogen-activated protein kinase inhibitor SB239063, the α7 nicotinic acetylcholine receptor inhibitor α-bungarotoxin, the α4 nicotinic acetylcholine receptor inhibitor dihydro-β-erythroidine, the PI3K inhibitor wortmannin, the PKC inhibitor calphostin C, and the PKA inhibitor H89 have been used to evaluate the effects on proliferations...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29074413/galantamine-attenuates-n-n-dimethyl-hydrazine-induced-neoplastic-colon-damage-by-inhibiting-acetylcholinesterase-and-bimodal-regulation-of-nicotinic-cholinergic-neurotransmission
#11
Shreesh Raj Sammi, Jitendra K Rawat, Neetu Raghav, Ajay Kumar, Subhadeep Roy, Manjari Singh, Swetlana Gautam, Rajnish K Yadav, Uma Devi, Rakesh Pandey, Gaurav Kaithwas
The present study reveals the effect of galantamine (GAL) against 1, 2-dimethylhydrazine (DMH) induced colon cancer. Wistar albino rats were arbitrarily divided into four groups (n = 8). Group 1 served as normal control (normal saline, 3ml/kg/day, p.o.); group 2, 3 and 4 received DMH (20mg/kg/week, s.c.), for 6 weeks; groups 3 and 4 also received GAL (2 and 4mg/kg/day, p.o) for 6 weeks. DMH treated rats showed decreased heart rate variability (HRV) factors, increased incidence of aberrant crypt foci (ACF), increased thiobarbituric acid reactive substances (TBARs) along with the decrease in the enzymatic activity of superoxide dismutase (SOD) and catalase...
October 23, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29042416/nicotine-prevents-and-reverses-paclitaxel-induced-mechanical-allodynia-in-a-mouse-model-of-cipn
#12
S Lauren Kyte, Wisam Toma, Deniz Bagdas, Julie A Meade, Lesley D Schurman, Aron H Lichtman, Zhi-Jian Chen, Egidio Del Fabbro, Xianjun Fang, John W Bigbee, M Imad Damaj, David A Gewirtz
Chemotherapy-induced peripheral neuropathy (CIPN), a consequence of peripheral nerve fiber dysfunction or degeneration, continues to be a dose-limiting and debilitating side effect during and/or after cancer chemotherapy. Paclitaxel, a taxane commonly used to treat breast, lung, and ovarian cancers, causes CIPN in 59-78% of cancer patients. Novel interventions are needed due to the current lack of effective CIPN treatments. Our studies were designed to investigate if nicotine can prevent and/or reverse paclitaxel-induced peripheral neuropathy in a mouse model of CIPN, while ensuring that nicotine will not stimulate lung tumor cell proliferation or interfere with the anti-tumor properties of paclitaxel...
October 17, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29039603/blockade-of-%C3%AE-7-nicotinic-acetylcholine-receptors-inhibit-nicotine-induced-tumor-growth-and-vimentin-expression-in-non-small-cell-lung-cancer-through-mek-erk-signaling-way
#13
Chun Zhang, Ping Yu, Liang Zhu, Qingnan Zhao, Xiaotong Lu, Shuhong Bo
Nicotine can stimulate the progression of non-small cell lung cancer (NSCLC) through nicotinic acetylcholine receptors (nAChRs). The persistent proliferation of cancer cells is one of the key effects of nicotinic signaling. The present study aimed to clarify the mechanism of nicotine-induced proliferation in NSCLCs at the receptor subtype level. We have previously reported that there are various subtypes of nicotinic receptors expressed in NSCLC cell lines. In the present study, we demonstrated that blocking α7nAChRs agonized by nicotine could suppress the proliferation of H1299 cells in vitro and decrease H1299 tumor xenograft growth in nude mice...
October 2, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28978081/expression-patterns-for-nicotinic-acetylcholine-receptor-subunit-genes-in-smoking-related-lung-cancers
#14
Anna Bordas, José Luis Cedillo, Francisco Arnalich, Isabel Esteban-Rodriguez, Laura Guerra-Pastrián, Javier de Castro, Carolina Martín-Sánchez, Gema Atienza, Carmen Fernández-Capitan, Juan José Rios, Carmen Montiel
Cigarette smoking is associated with increased risk for all histologic types of lung cancer, but why the strength of this association is stronger for squamous cell carcinoma than adenocarcinoma of the lung (SQC-L, ADC-L) is not fully understood. Because nicotine and tobacco-specific nitrosamines contribute to carcinogenesis by activating nicotinic acetylcholine receptors (nAChRs) on lung tumors and epithelial cells, we investigated whether differential expression of nAChR subtypes in these tumors could explain their different association with smoking...
September 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28974241/recombinant-newcastle-disease-virus-rl-rvg-enhances-the-apoptosis-and-inhibits-the-migration-of-a549-lung-adenocarcinoma-cells-via-regulating-alpha-7-nicotinic-acetylcholine-receptors-in-vitro
#15
Yulan Yan, Chunxiang Su, Min Hang, Hua Huang, Yinghai Zhao, Xiaomei Shao, Xuefeng Bu
BACKGROUND: The aim of this study were to investigate the possible pro-apoptotic mechanisms of the recombinant Newcastle disease virus (NDV) strain rL-RVG, which expresses the rabies virus glycoprotein, in A549 lung adenocarcinoma cells via the regulation of alpha 7 nicotinic acetylcholine receptors (α7 nAChRs) and to analyze the relationships between α7 nAChR expression in lung cancer and the clinical pathological features. METHODS: α7 nAChR expression in A549, LΑ795, and small-cell lung carcinoma (SCLC) cells, among others, was detected using reverse transcription polymerase chain reaction (RT-PCR)...
October 3, 2017: Virology Journal
https://www.readbyqxmd.com/read/28972577/genome-wide-association-study-across-european-and-african-american-ancestries-identifies-a-snp-in-dnmt3b-contributing-to-nicotine-dependence
#16
D B Hancock, Y Guo, G W Reginsson, N C Gaddis, S M Lutz, R Sherva, A Loukola, C C Minica, C A Markunas, Y Han, K A Young, D F Gudbjartsson, F Gu, D W McNeil, B Qaiser, C Glasheen, S Olson, M T Landi, P A F Madden, L A Farrer, J Vink, N L Saccone, M C Neale, H R Kranzler, J McKay, R J Hung, C I Amos, M L Marazita, D I Boomsma, T B Baker, J Gelernter, J Kaprio, N E Caporaso, T E Thorgeirsson, J E Hokanson, L J Bierut, K Stefansson, E O Johnson
Cigarette smoking is a leading cause of preventable mortality worldwide. Nicotine dependence, which reduces the likelihood of quitting smoking, is a heritable trait with firmly established associations with sequence variants in nicotine acetylcholine receptor genes and at other loci. To search for additional loci, we conducted a genome-wide association study (GWAS) meta-analysis of nicotine dependence, totaling 38,602 smokers (28,677 Europeans/European Americans and 9925 African Americans) across 15 studies...
October 3, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28917942/in-vivo-and-in-vitro-testing-of-native-%C3%AE-conotoxins-from-the-injected-venom-of-conus-purpurascens
#17
REVIEW
Mickelene F Hoggard, Alena M Rodriguez, Herminsul Cano, Evan Clark, Han-Shen Tae, David J Adams, Tanja A Godenschwege, Frank Marí
α-Conotoxins inhibit nicotinic acetylcholine receptors (nAChRs) and are used as probes to study cholinergic pathways in vertebrates. Model organisms, such as Drosophila melanogaster, express nAChRs in their CNS that are suitable to investigate the neuropharmacology of α-conotoxins in vivo. Here we report the paired nanoinjection of native α-conotoxin PIA and two novel α-conotoxins, PIC and PIC[O7], from the injected venom of Conus purpurascens and electrophysiological recordings of their effects on the giant fiber system (GFS) of D...
September 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28901507/%C3%AE-7-nicotinic-acetylcholine-receptor-in-tumor-associated-macrophages-inhibits-colorectal-cancer-metastasis-through-the-jak2-stat3-signaling-pathway
#18
Rushan Fei, Yuanwei Zhang, Saisai Wang, Tao Xiang, Wenbin Chen
Considerable evidence has implied that α7 nicotinic receptor subtypes play an important role in chronic inflammatory and neuropathic pain signaling. The aim of the present study was to determine the role of endogenous α7nAChR signaling in tumor-associated macrophages (TAMs) in human colorectal cancer (CRC) metastasis and prognosis. α7nAChR expression in primary tumor cells and adjacent stroma cells especially in TAMs in 51 CRC patients was observed. Using a human monocyte THP-derived macrophages (TMs) with α7nAChR-siRNA knockdown (TMα7-/-) and a CRC cell Transwell co-culture model, the migration and invasion of two CRC cells, LoVo and SW620, were determined...
November 2017: Oncology Reports
https://www.readbyqxmd.com/read/28901280/neuronal-and-extraneuronal-nicotinic-acetylcholine-receptors
#19
Michele Zoli, Susanna Pucci, Antonietta Vilella, Cecilia Gotti
Neuronal nicotinic acetylcholine receptors (nAChRs) belong to a super-family of Cys-loop ligand-gated ion channels that respond to endogenous acetylcholine (ACh) or other cholinergic ligands. These receptors are also the targets of drugs such as nicotine (the main addictive agent delivered by cigarette smoke) and are involved in a variety of physiological and pathophysiological processes. Numerous studies have shown that the expression and/or function of nAChRs is compromised in many neurological and psychiatric diseases...
September 11, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28878681/alpha5-nicotinic-acetylcholine-receptor-contributes-to-nicotine-induced-lung-cancer-development-and-progression
#20
Hai-Ji Sun, Yan-Fei Jia, Xiao-Li Ma
Nicotine and nicotinic acetylcholine receptors (nAChRs) are considered to be involved in lung cancer risk, onset and progression, but their precise physiological roles in these contexts remain unclear. Our previous studies suggested that α5-nAChR mediates nicotine-induced lung cancer cell proliferation, migration, and invasion in vitro. In this study, we aimed to determine the role of α5-nAChR in the development and progression of non-small cell lung cancer (NSCLC). Our microarray results reveal that knockdown of the CHRNA5 gene encoding α5-nAChR significantly modulates key pathways including the cell cycle, DNA replication, pathway in cancer...
2017: Frontiers in Pharmacology
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