keyword
MENU ▼
Read by QxMD icon Read
search

Nicotine Receptors cancer

keyword
https://www.readbyqxmd.com/read/28416445/%C3%AE-o-conotoxin-gexiva-disulfide-bond-isomers-exhibit-differential-sensitivity-for-various-nicotinic-acetylcholine-receptors-but-retain-potency-and-selectivity-for-the-human-%C3%AE-9%C3%AE-10-subtype
#1
REVIEW
Dongting Zhangsun, Xiaopeng Zhu, Quentin Kaas, Yong Wu, David J Craik, J Michael McIntosh, Sulan Luo
Nicotinic acetylcholine receptor (nAChR) subtypes exhibit distinct neuropharmacological properties that are involved in a range of neuropathological conditions, including pain, addiction, epilepsy, autism, schizophrenia, Tourette's syndrome, Alzheimer's and Parkinson's diseases, as well as many types of cancer. The α9α10 nAChR is a potential target in chronic pain, wound healing, the pathophysiology of the auditory system, and breast and lung cancers. αO-conotoxin GeXIVA is a potent antagonist of rat α9α10 nAChRs, with the 'bead' disulfide bond isomer displaying the lowest IC50 of the three possible isomers...
April 14, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28361878/structural-mechanisms-for-%C3%AE-conotoxin-activity-at-the-human-%C3%AE-3%C3%AE-4-nicotinic-acetylcholine-receptor
#2
Nikita Abraham, Michael Healy, Lotten Ragnarsson, Andreas Brust, Paul F Alewood, Richard J Lewis
Nicotinic acetylcholine receptors (nAChR) are therapeutic targets for a range of human diseases. α-Conotoxins are naturally occurring peptide antagonists of nAChRs that have been used as pharmacological probes and investigated as drug leads for nAChR related disorders. However, α-conotoxin interactions have been mostly characterised at the α7 and α3β2 nAChRs, with interactions at other subtypes poorly understood. This study provides novel structural insights into the molecular basis for α-conotoxin activity at α3β4 nAChR, a therapeutic target where subtype specific antagonists have potential to treat nicotine addiction and lung cancer...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28315314/nicotine-promotes-cholangiocarcinoma-growth-in-xenograft-mice
#3
Allyson K Martínez, Kendal Jensen, Chad Hall, April O'Brien, Laurent Ehrlich, Tori White, Fanyin Meng, Tianhao Zhou, John Greene, Francesca Bernuzzi, Pietro Invernizzi, David E Dostal, Terry Lairmore, Gianfranco Alpini, Shannon Glaser
Nicotine, the main addictive substance in tobacco, is known to play a role in the development and/or progression of a number of malignant tumors. However, nicotine's involvement in the pathogenesis of cholangiocarcinoma is controversial. Therefore, we studied the effects of nicotine on the growth of cholangiocarcinoma cells in vitro and the progression of cholangiocarcinoma in a mouse xenograft model. The predominant subunit responsible for nicotine-mediated proliferation in normal and cancer cells, the α7 nicotinic acetylcholine receptor (α7-nAChR), was more highly expressed in human cholangiocarcinoma cell lines compared with normal human cholangiocytes...
March 14, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28302035/translational-multimodality-neuroimaging
#4
Sushil K Sharma
Recently high-resolution, noninvasive, multimodality in-vivo molecular imaging with PET, SPECT, CT and MRI, employing fusion algorithms has revolutionized personalized medicine. However, specific radiopharmaceuticals (RPs) for the accurate diagnosis and effective treatment of progressive neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, drug addiction, and other cognitive impairments still remain in developmental phase. Currently, multimodality fusion neuroimaging is utilized for the determination of: pharmacokinetics and pre-clinical development of radiopharmaceuticals (RPs); in-vivo monitoring of stem cell transplantation therapy; nicotinic acetylcholine receptors (nAChRs) investigations; and regional cerebral blood flow and glucose metabolism in cognitively-impaired subjects employing noninvasive microPET and nano-SPECT imaging...
March 15, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28240528/novel-mutations-of-the-chrna3-gene-in-non-small-cell-lung-cancer-in-an-iranian-population
#5
Nahid Mehrabi, Seyed Mohammad Moshtaghioun, Hossein Neamatzadeh
Background: Lung cancer, the leading cause of cancer-related worldwide deaths, largely results from the combined effects of smoking exposure and genetic susceptibility. CHRNA3, a nicotinic acetylcholine receptor gene, is associated with lung cancer risk. This study sought to identify variations in exon 3 of CHRNA3 in an Iranian population with non-small cell lung cancer (NSCLC). Materials and methods: A case-control study including 147 individuals with lung cancer and 145 healthy individuals was conducted. As mobility shift caused by nucleotide substitutions might be due to a conformational change of single-stranded DNAs, we designated these as single-strand conformation polymorphisms (SSCPs)...
January 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28223528/inhibition-of-%C3%AE-9%C3%AE-10-nicotinic-acetylcholine-receptors-prevents-chemotherapy-induced-neuropathic-pain
#6
Haylie K Romero, Sean B Christensen, Lorenzo Di Cesare Mannelli, Joanna Gajewiak, Renuka Ramachandra, Keith S Elmslie, Douglas E Vetter, Carla Ghelardini, Shawn P Iadonato, Jose L Mercado, Baldomera M Olivera, J Michael McIntosh
Opioids are first-line drugs for moderate to severe acute pain and cancer pain. However, these medications are associated with severe side effects, and whether they are efficacious in treatment of chronic nonmalignant pain remains controversial. Medications that act through alternative molecular mechanisms are critically needed. Antagonists of α9α10 nicotinic acetylcholine receptors (nAChRs) have been proposed as an important nonopioid mechanism based on studies demonstrating prevention of neuropathology after trauma-induced nerve injury...
March 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28222901/pharmacotherapy-in-smoking-cessation-corticotropin-releasing-factor-receptors-as-emerging-intervention-targets
#7
REVIEW
Ioannis Sotiriou, Kleanthi Chalkiadaki, Christos Nikolaidis, Kyriaki Sidiropoulou, Ekaterini Chatzaki
Smoking represents perhaps the single most important health risk factor and a global contributor to mortality that can unquestionably be prevented. Smoking is responsible for many diseases, including various types of cancer, chronic obstructive pulmonary disease, coronary heart disease, peripheral vascular disease and peptic ulcer, while it adversely affects fetal formation and development. Since smoking habit duration is a critical factor for mortality, the goal of treatment should be its timely cessation and relapse prevention...
February 14, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28077796/tumor-cell-migration-is-inhibited-by-a-novel-therapeutic-strategy-antagonizing-the-alpha-7-receptor
#8
Chris Pepper, Henry Tu, Paul Morrill, Sara Garcia-Rates, Chris Fegan, Susan Greenfield
A 14mer peptide (T14) derived from the C-terminus of acetylcholinesterase (AChE) selectively activates metastatic breast cancer cells via the alpha-7 nicotinic receptor (α7 nAChR). This naturally occurring peptide is also present in brain, is elevated in Alzheimer's disease, and is antagonised by a cyclized variant (NBP-14). Here we investigated the effects of NBP-14 in six different cancer cell lines, primary leukemia B-cells and normal B-cells. All cells tested expressed α7 nAChR, intracellular and extracellular T14...
February 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28045487/probing-the-allosteric-role-of-the-%C3%AE-5-subunit-of-%C3%AE-3%C3%AE-4%C3%AE-5-nicotinic-acetylcholine-receptors-by-functionally-selective-modulators-and-ligands
#9
Caroline Ray, Erik J Soderblom, Yushi Bai, F Ivy Carroll, Marc G Caron, Larry S Barak
Nicotinic acetylcholine receptors regulate the nicotine dependence encountered with cigarette smoking, and this has stimulated a search for drugs binding the responsible receptor subtypes. Studies link a gene cluster encoding for α3β4α5-D398N nicotinic acetylcholine receptors to lung cancer risk as well as link a second mutation in this cluster to an increased risk for nicotine dependence. However, there are currently no recognized drugs for discriminating α3β4α5 signaling. In this study, we describe the development of homogeneous HEK-293 cell clones of α3β4 and α3β4α5 receptors appropriate for drug screening and characterizing biochemical and pharmacological properties of incorporated α5 subunits...
March 17, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/27801769/adult-onset-opsoclonus-myoclonus-syndrome-associated-with-ganglionic-acetylcholine-receptor-autoantibody
#10
Jonathan R Galli, Stacey L Clardy, M Mateo Paz Soldán
INTRODUCTION: Opsoclonus-myoclonus syndrome (OMS) may have a toxin induced, parainfectious, or paraneoplastic etiology. Several autoantibodies have been associated with adult-onset OMS, most commonly antineuronal nuclear antibody 2 (Ri), and it is most frequently associated with breast or small cell lung cancer. The nicotinic ganglionic acetylcholine receptor autoantibody (α3-AChR Ab) has not been described in association. CASE REPORT: A 46-year-old woman was evaluated for symptoms of oscillopsia, tremor, gait imbalance, and mild cognitive deficits that began 6 weeks prior...
November 2016: Neurologist
https://www.readbyqxmd.com/read/27769050/protein-phosphatase-mg2-mn2-dependent-1f-promotes-smoking-induced-breast-cancer-by-inactivating-phosphorylated-p53-induced-signals
#11
Shih-Hsin Tu, Yin-Ching Lin, Chi-Cheng Huang, Po-Sheng Yang, Hui-Wen Chang, Chien-Hsi Chang, Chih-Hsiung Wu, Li-Ching Chen, Yuan-Soon Ho
We previously demonstrated that the activation of α9-nicotinic acetylcholine receptor (α9-nAchR) signaling by smoking promotes breast cancer formation. To investigate the downstream signaling molecules involved in α9-nAChR-induced breast tumorigenesis, we used real-time polymerase chain reactions and Western blotting to assess expression of protein phosphatase Mg2+/Mn2+ dependent 1F (PPM1F), a Ser/Thr protein phosphatase, in human breast cancer samples (n=167). Additionally, stable PPM1F-knockdown and -overexpressing cell lines were established to evaluate the function of PPM1F...
November 22, 2016: Oncotarget
https://www.readbyqxmd.com/read/27666821/the-tobacco-specific-carcinogen-operated-calcium-channel-promotes-lung-tumorigenesis-via-igf2-exocytosis-in-lung-epithelial-cells
#12
Hye-Jin Boo, Hye-Young Min, Hyun-Ji Jang, Hye Jeong Yun, John Kendal Smith, Quanri Jin, Hyo-Jong Lee, Diane Liu, Hee-Seok Kweon, Carmen Behrens, J Jack Lee, Ignacio I Wistuba, Euni Lee, Waun Ki Hong, Ho-Young Lee
Nicotinic acetylcholine receptors (nAChRs) binding to the tobacco-specific carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) induces Ca(2+) signalling, a mechanism that is implicated in various human cancers. In this study, we investigated the role of NNK-mediated Ca(2+) signalling in lung cancer formation. We show significant overexpression of insulin-like growth factors (IGFs) in association with IGF-1R activation in human preneoplastic lung lesions in smokers. NNK induces voltage-dependent calcium channel (VDCC)-intervened calcium influx in airway epithelial cells, resulting in a rapid IGF2 secretion via the regulated pathway and thus IGF-1R activation...
September 26, 2016: Nature Communications
https://www.readbyqxmd.com/read/27623933/%C3%AE-cryptoxanthin-reduced-lung-tumor-multiplicity-and-inhibited-lung-cancer-cell-motility-by-downregulating-nicotinic-acetylcholine-receptor-%C3%AE-7-signaling
#13
Anita R Iskandar, Benchun Miao, Xinli Li, Kang-Quan Hu, Chun Liu, Xiang-Dong Wang
Despite the consistent association between a higher intake of the provitamin A carotenoid β-cryptoxanthin (BCX) and a lower risk of lung cancer among smokers, potential mechanisms supporting BCX as a chemopreventive agent are needed. We first examined the effects of BCX on 4-[methyl nitrosamino]-1-[3-pyridyl]-1-butanone (NNK)-induced lung tumorigenesis in A/J mice. BCX supplementation was given daily to the mice starting 2 weeks prior to the injection of NNK and continued 16 weeks after NNK injection. BCX supplementation resulted in a dose-dependent increase of BCX concentration in both serum and lungs of the mice without a significant alteration of vitamin A (retinol and retinyl palmitate) concentration...
November 2016: Cancer Prevention Research
https://www.readbyqxmd.com/read/27606721/differential-receptor-dependencies-expression-and-significance-of-muscarinic-m1-receptors-in-the-biology-of-prostate-cancer
#14
Abdul Mannan Baig, Naveed A Khan, Vardah Effendi, Zohaib Rana, H R Ahmad, Farhat Abbas
Recent reports on acetylcholine muscarinic receptor subtype 3 (CHRM3) have shown its growth-promoting role in prostate cancer. Additional studies report the proliferative effect of the cholinergic agonist carbachol on prostate cancer by its agonistic action on CHRM3. This study shows that the type 1 acetylcholine muscarinic receptor (CHRM1) contributes toward the proliferation and growth of prostate cancer. We used growth and cytotoxic assays, the prostate cancer microarray database and CHRM downstream pathways' homology of CHRM subtypes to uncover multiple signals leading to the growth of prostate cancer...
January 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/27509656/-the-role-of-estrogens-in-the-carcinogenesis-of-lung-cancer
#15
REVIEW
E Uchikova, A Uchikov, E Dimitrakova, P Uchikov
Morbidity and mortality from lung cancer has dramatically increased in women as compared to men over the past few years. Historically, smoking has been considered the major risk factor for lung cancer regardless of gender. Several recent lines of evidence implicate gender differences in the observed differences in prevalence and histologic type which cannot be explained based on the carcinogenic action of nicotine. Several recent studies underscore the importance of reproductive and hormonal factors in the carcinogenesis of lung cancer Lung cancer morbidity and mortality in Bulgaria was 16...
2016: Akusherstvo i Ginekologii︠a︡
https://www.readbyqxmd.com/read/27462996/an-efficient-method-to-genotype-the-polymorphisms-of-cholinergic-nicotinic-receptor-subunit-genes-and-their-associations-with-copd-onset-risk
#16
Zhuxiang Zhao, Yumin Zhou, Yujun Li, Changbin Jiang, Dongxing Zhao, Ziwen Zhao, Zhaohui Liu, Pixin Ran
BACKGROUND: Single-nucleotide polymorphisms (SNPs) in the cholinergic nicotinic receptor subunit genes on chromosome 15q25.1, including CHRNA3, CHRNB4 and CHRNA5, are well-established biomarkers of chronic obstructive pulmonary disease (COPD) and lung cancer. Thus, there is great demand for a rapid, easy and inexpensive method to detect these variations for purpose of risk prediction in large populations. AIM OF THE STUDY: The aim of this study was to establish an accurate and efficient method for genotyping CHRN SNPs and testing their association with age at onset of COPD in Chinese population as well as the clinical stage in COPD patients...
June 2016: Experimental Lung Research
https://www.readbyqxmd.com/read/27409670/role-of-%C3%AE-7-nicotinic-acetylcholine-receptor-in-nicotine-induced-invasion-and-epithelial-to-mesenchymal-transition-in-human-non-small-cell-lung-cancer-cells
#17
Chun Zhang, Xu-Ping Ding, Qing-Nan Zhao, Xin-Jie Yang, Shi-Min An, Hao Wang, Lu Xu, Liang Zhu, Hong-Zhuan Chen
Nicotine via nicotinic acetylcholine receptors (nAChRs) stimulates non-small cell lung cancer (NSCLC) cell invasion and epithelial to mesenchymal transition (EMT) which underpin the cancer metastasis. However, the receptor subtype-dependent effects of nAChRs on NSCLC cell invasion and EMT, and the signaling pathway underlying the effects remain not fully defined. We identified that nicotine induced NSCLC cell invasion, migration, and EMT; the effects were suppressed by pharmacological intervention using α7-nAChR selective antagonists or by genetic intervention using α7-nAChR knockdown via RNA inference...
September 13, 2016: Oncotarget
https://www.readbyqxmd.com/read/27234470/nicotinic-acetylcholine-receptors-in-head-and-neck-cancer-and-their-correlation-to-tumor-site-and-progression
#18
Claudia Scherl, Renate Schäfer, Anne Schlabrakowski, Konstantin Tziridis, Heinrich Iro, Olaf Wendler
BACKGROUND: Nicotine contributes to tumorigenesis through stimulation of nicotinic acetylcholine receptors (nAChRs) in head and neck squamous cell carcinoma (SCC). Although many factors have been found to be involved in the pathogenesis of head and neck cancer, the effect of nAChRs is still unclear. The study provides information on different subtypes in SCC and normal mucosa (NM) and their clinicopathological correlation to tumor progression. METHODS: SCC (n = 34) of oropharynx, hypopharynx, larynx and corresponding NM (n = 38) were analyzed by quantitative real-time polymerase chain reaction, immunoblotting and immunohistochemistry and correlated to tumor grading and Union for International Cancer Control (UICC) stage...
2016: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/27228072/nicotine-mediated-regulation-of-nicotinic-acetylcholine-receptors-in-non-small-cell-lung-adenocarcinoma-by-e2f1-and-stat1-transcription-factors
#19
Courtney Schaal, Srikumar Chellappan
Cigarette smoking is the major risk factor for non-small cell lung cancer (NSCLC), which accounts for 80% of all lung cancers. Nicotine, the addictive component of tobacco smoke, can induce proliferation, migration, invasion, epithelial-mesenchymal transition (EMT), angiogenesis, and survival in NSCLC cell lines, as well as growth and metastasis of NSCLC in mice. This nicotine-mediated tumor progression is facilitated through activation of nicotinic acetylcholine receptors (nAChRs), specifically the α7 subunit; however, how the α7 nAChR gene is regulated in lung adenocarcinoma is not fully clear...
2016: PloS One
https://www.readbyqxmd.com/read/27158893/nicotine-receptor-partial-agonists-for-smoking-cessation
#20
REVIEW
Kate Cahill, Nicola Lindson-Hawley, Kyla H Thomas, Thomas R Fanshawe, Tim Lancaster
BACKGROUND: Nicotine receptor partial agonists may help people to stop smoking by a combination of maintaining moderate levels of dopamine to counteract withdrawal symptoms (acting as an agonist) and reducing smoking satisfaction (acting as an antagonist). OBJECTIVES: To review the efficacy of nicotine receptor partial agonists, including varenicline and cytisine, for smoking cessation. SEARCH METHODS: We searched the Cochrane Tobacco Addiction Group's specialised register for trials, using the terms ('cytisine' or 'Tabex' or 'dianicline' or 'varenicline' or 'nicotine receptor partial agonist') in the title or abstract, or as keywords...
May 9, 2016: Cochrane Database of Systematic Reviews
keyword
keyword
112791
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"