{"title":"Involvement of Thermo TRP channels on chemothrepeutic agents-induced peripheral pain","authors":"M. K. Yıldırım","doi":"10.37212/jcnos.610118","DOIUrl":"https://doi.org/10.37212/jcnos.610118","url":null,"abstract":"Accumulating evidences have indicated that disturbances in intracellular free calcium ([Ca2+]i) concentration play an important role in the pathophysiology of peripheral pain. Ca2+ passes cell membrane via different channels such as chemical and voltage gated channels. Apart from the well-known cation channels, there is recently discovered channels namely transient receptor potential (TRP) family. At least, 11 TRP channels in mammalian cells have been identified as thermosensitive TRP (thermo-TRP) channels (Uchida et al. 2017). Two TRP channels (TRPV1 and TRPV2) are activated by high temperatures. Five TRP channels (TRPV1-4 and TRPM2) are activated by different heat temperatures, although two of TRP channels (TRPA1 and TRPM8) are activated by cold and cool temperatures, respectively (Naziroglu and Braidy, 2017). It is well known that increase of [Ca2+]i concentration but decrease of intracellular Mg2+ levels induces activation of nitric oxide synthase (NOS) enzyme. By catalytic activity of NOS, nitric oxide synthetizes in neurons. In turn, it induces pain through production of excitatory amino acids and substance P (Medvedeva et al. 2008). Results of recent studies indicated involvement of chemothrepeutic agents (i.e. cisplatin, oxaliplatin and paclitaxel)-induced mitochondrial oxidative stress through activation of Thermo TRP channels such as TRPA1, TRPV1 and TRPM8, although antioxidants induced protective action on the pain induction through inhibition of the TRP channels in the experimental animals (Materazzi et al. 2012). In the oral presentation, I discussed novel effects of chemotherapeutic agents on the peripheral pain by the regulation of TRP channels. I concluded that the chemotherapeutic agents cause TRP channel activation and oxidative stress, which may lead to the pathology of peripheral pain. It seems to that the exact relationship between TRP channel activation and chemotherapeutic agents still remain to be determined.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44584648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Voltage gated sodium channels and epilepsy","authors":"S. Hebeisen","doi":"10.37212/JCNOS.584668","DOIUrl":"https://doi.org/10.37212/JCNOS.584668","url":null,"abstract":"Epilepsy is the fourth most common neurological disorder and affects people of all ages. Medication for epilepsy is often life-long and has a major impact on the quality of life - mostly being related to substantial adverse effects. Therefore, over 30% of people with epilepsy do not achieve sufficient seizure control whilst effective medication being available. Ion channels are often primary targets of anticonvulsant drugs. They can either act as blockers for voltage gated sodium and calcium channels or as activators for potassium or chloride channels. Additionally, modulators of ligand gated ion channels (GABA or Glutamate receptors) are frequently used to treat epilepsy. Employing a panel of functional electrophysiological assays using fluorescence based methods and patch-clamping on a broad range of voltage and ligand gated ion channels, we were able to successfully screen for drugs with a beneficial action profile. In successful leads we found drugs that selectively interacted with TTX sensitive, neuronal voltage gated sodium channels. Activation and fast inactivation were unchanged, while an increased affinity in the slow inactivated state was observed. This profile is in contrast to traditional anticonvulsant drugs which show their major effects on the fast inactivated state of voltage gated sodium channels. One drug showed substantial shifts of the voltage dependence of the slow inactivation only for NaV1.2 and 1.6. This favours this drug for treating patients with diseases with compromised NaV1.1 function in interneurons, such as Alzheimer's disease.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43904538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"TRPV1 channel is a potential drug discovery channel for epilepsy","authors":"Ahmet Özşimşek","doi":"10.37212/JCNOS.610113","DOIUrl":"https://doi.org/10.37212/JCNOS.610113","url":null,"abstract":"Epilepsy is one of the most frequent and heterogeneous neurological disorders and it is characterized by several disabilities. Epilepsy is affecting about 3% of people worldwide. Current antiepileptic drugs are only effective in 60% of individuals and many drugs can induce several unwanted side effects in patients. Etiology of epilepsy has not been clarified fully. However, increased intracellular calcium ion (Ca 2+ ) concentration has main role in etiology of epilepsy. Ca2+ passes the cell membrane through different cell membrane channels. One of the channels is TRP superfamily. The family is containing six subfamilies. TRPV1 channel is a member of TRPV subfamily. Capsaicin is a component of hot chili pepper. The TRPV1 channels is activated by different stimuli such as acidic pH, high temperature (≥ 42° C) and capsaicin, causing pain, inflammation and hyperalgesia in peripheral nervous system (Caterina et al. 1997). Is has been well known that hippocampus is main area in the brain for induction of epilepsy. Expression levels of TRPV1 channels in different areas of hippocampus are high (Gonzalez-Reyes et al. 2013). Results of recent studies indicated involvement of TRPV1 channels in epilepsy (Naziroglu and Ovey, 2015; Cho et al. 2018). In the oral presentation, I discussed novel roles of TRPV1 on the epilepsy induction by the capsaicin. Results of a recent study indicated increased levels of intracellular Ca2+ concentration in hippocampus of epilepsy induced rats (Naziroglu and Ovey, 2015). They also observed increased levels of intracellular mitochondrial oxidative stress and apoptosis levels in the neurons by the capsaicin stimulation. However, their levels were decreased by inhibition of TRPV1 channel blocker, capsazepine. I concluded that the results of recent studies suggest that TRPV1 stimulation through capsaicin causes oxidative stress and intracellular Ca2+ signaling in epileptic rats. It seems to that the certain role of TRPV1 channel activation in in the epilepsy still remains to be determined.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47496251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Role of desflurane on oxidative stress in neuroscience","authors":"Mustafa Kütük","doi":"10.37212/jcnos.610129","DOIUrl":"https://doi.org/10.37212/jcnos.610129","url":null,"abstract":"Oxidative stress in a neuron is induced by several physiological and pathological processes. Within the pathophysiological processes, ischemia-reperfusion injury has major role in the neurons and brain, because the neurons and brain are very sensitive to oxidative stress as compared to other tissues due to their high oxygen consumption rate and rich poly unsaturated fatty acid content but low antioxidant levels. Results of rodent studies indicated that exposure to volatile anesthetics as a result of ischemia-reperfusion injury can active leukocytes or alveolar macrophages, which, in turn, release inflammatory mediators and reactive oxygen species (ROS). This release of inflammatory mediators, ischemia/reperfusion injury, and ROS has been clearly demonstrated in generalized inflammatory reactions involving the production of phagocytic cells such as leucocytes and microglia. A common volatile general anesthetic is desflurane and results of several recent papers indicated that it an increase oxidative stress but can decrease antioxidant defense mechanisms through ischemia/reperfusion injury mechanisms. The excessive production of ROS is scavenged by enzymatic and non-enzymatic antioxidants. Major enzymatic antioxidants are vitamin A, vitamin C, vitamin E, glutathione, alpha lipoic acid and melatonin. Major non enzymatic antioxidants are glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) and catalase (CAT). Superoxide radical is converted to hydrogen peroxide by SOD enzyme and then the hydrogen peroxide is converted to water by CAT and GSH-Px enzymes. Results of papers indicated that the CAT, GSH-Px, SOD, vitamin A, vitamin E and vitamin C values were decreased in plasma and erythrocytes of human and animals by desflurane anesthesia, but oxidative stress levels were increased by desflurane anesthesia (Allaouchiche et al. 2001; Ceylan et al. 2011; Yalcin et al. 2013). In the oral presentation, I will summarize the results of recent papers on oxidative stress and antioxidants in human and rodents. In conclusion, it seems that desflurane anesthesia has oxidant effects through down-regulating the enzymatic and non-enzymatic antioxidants but upregulating of lipid peroxidation.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43896770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Involvement of TRP channels on fibromyalgiainduced pain","authors":"A. Doğru","doi":"10.37212/JCNOS.610116","DOIUrl":"https://doi.org/10.37212/JCNOS.610116","url":null,"abstract":"Fibromyalgia (FM) is a common chronic pain syndrome affecting up to 2% of the adult population. Several factors such as excessive oxidative stress and overload calcium ion (Ca2+) influx play main roles in the etiology of FM. Several pharmaceutical drugs such as antidepressants and voltage-gated calcium channel blockers are recommended for the treatment of FM; however, they fail to produce a satisfactory response in patients with FM because of the unclear etiology of the disease. Transient receptor potential (TRP) channels have six subfamilies and 27 members in human. Most of these channels are responsible in dorsal root ganglia (DRG) neurons for the Ca2+ permeation especially in neuronal cells. Expression level of the TRPM2 and TRPV1 channels are high in the DRG neurons and they show oxidative stress dependent activation (Tan and McNaughton 2016; Santos et al. 2018). The TRPM2 and TRPV1 channel expression levels in the DRG increased in different types of pain. Selenium as an antioxidant trace element is implicated as a neuroprotective agent in peripheral pain through the inhibition of apoptosis and regulation of the TRPM2 and TRPV1 channels (Kahya et al. 2017). Since a decade, a recent theory have argued that both supporting of intracellular antioxidant system and extracellular antioxidant administration may helpful in fibromyalgia for the inhibition of TRP channels mediated Ca2+ influx (Yuksel et al. 2017). In the oral presentation, I discussed novel effects of selenium on the treatment of irregular oxidative status and fibromyalgia by the regulation of TRPM2 and TRPV1 channels in rats. In conclusion, present literature information indicated that protective effects of selenium on TRPM2 and TRPV1 channels may novel approach to treat FM induced pain and mitochondrial oxidative stress. However, the subject should be clarified by further studies.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42696323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Western-blot, PCR and immunofluorescence analysis in mitochondrial biogenesis studies","authors":"D. Rousseau","doi":"10.37212/jcnos.609964","DOIUrl":"https://doi.org/10.37212/jcnos.609964","url":null,"abstract":"Mitochondria are providing an essential amount of energy to the cell, to achieve in homeostasis, metabolic increases, proliferation and differentiation processes. Also, mitochondrial deficiencies have severe or lethal impacts on cell viability. Among the 3000 proteins involved in mitochondrial activities, ATAD3 is a major one as essential for mitochondrial biogenesis, vital as early as embryonic implantation. In order to see its impact at animal level, we have used ATAD3+/- mice to investigate its role in running training and in high calorie diet. We found here that ATAD3 expression level avoids running capacity improvement and has a strong effect on weight increase, underlying its important role in mitochondrial mass regulations. Prior to this presentation we will emphasize on the potential of Western-blot, PCR and immunofluorescence analysis in biomedical researches.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47187816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Experimental Parkinson’s disease models","authors":"E. İpek","doi":"10.37212/jcnos.610154","DOIUrl":"https://doi.org/10.37212/jcnos.610154","url":null,"abstract":"Parkinson's disease (PD) is a neurodegenerative disease that develops slowly; however, there is no efficient method of early diagnosis, nor is there a cure. It is characterized by the relatively selective loss of dopaminergic neuronal cells in the substantia nigra pars compacta and the presence of alpha-synuclein aggregation named as Lewy bodies and Lewy neurites in surviving affected neurons. Nigrostriatal dopaminergic neurodegeneration is shared with other parkinsonian disorders, including some genetic forms of parkinsonism, but many of these disorders do not have Lewy bodies. An ideal animal model for PD, therefore, should exhibit age-dependent and progressive dopaminergic neurodegeneration, motor and non-motor dysfunction, and abnormal alpha-synuclein pathology. A wide range of neurotoxic agents are used to induce PD, alterations that are similar with dose observed in human PD. These agents are classified mainly by administration route and the species involved. The toxins that are mainly used in present 6- hydroxydopamine, 1-Methyl-4-phenyl-1,2,3,6- tetrahydropyridine, rotenone, paraquat, reserpine, methamphetamine, 3-nitrotyrosine and isoquinoline derivatives (Tieu, 2011; McDowell and Chesselet, 2012; Bezard et al. 2013). In addition, viral mediated expression of human α-synuclein, as well as the inoculation of pathogenic α-synuclein species from Lewy bodies of PD patients, for accurately modelling progressive self-propagating neurodegeneration and genetic LRRK2 models (PARK8 gene mutation) has been used (Jiang and Dickson, 2018). In conclusion, these models are only approximations, each possibly holding a certain degree of relevance. Thus, researchers should select models whose characteristics are most suitable for addressing the experimental question.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70024659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pathophysiology of cation channels in pain: Focus on TRP Channels","authors":"M. Naziroğlu","doi":"10.37212/JCNOS.609840","DOIUrl":"https://doi.org/10.37212/JCNOS.609840","url":null,"abstract":"In neurons such as dorsal root ganglion (DRG) and trigeminal ganglia, calcium (Ca2+) and sodium ion concentrations are higher in in outside than in cytosol, although potassium ion concentration was higher in inside of the neurons than outside of the neurons. Within the ions, it has been suggested that a dysregulation of Ca2+ homeostasis acts a key role in the pathogenesis of oxidative stress associated nerve damage. Ca2+ is a main intracellular messenger involved in several physiological functions of neurons such survival, death, synaptic plasticity and neurotransmitter release. It has specific role in induction of peripheral pain. Ca2+ passes cell membrane via different channels such as chemical and voltage gated channels. Apart from the well-known cation channels, there is recently discovered channels namely transient receptor potential (TRP) family. The TRP superfamily is containing 6 subfamilies with 28 members in mammalian. Activation and inhibition mechanisms of the TRP channels are very different from the voltage gated calcium channels. Some TRP channels such as TRP melastatin 2 (TRPM2), melastatin 7 (TRPM7) and TRP ankyrin 1 (TRPA1) are activated by oxidative stress. Expression levels of TRPA1, TRPM2 and TRPM7 are high in DRG, phagocytic cells and hippocampus, respectively. Therefore, TRPM2 is important channels in physiological activity of phagocytic cells such as neutrophil and monocytes (Heiner et al. 2006). TRPM7 and TRPA1 have main roles in cerebral ischemia and peripheral pain molecular pathways, respectively (Carrasco et al. 2018; Sun, 2017). Till today specific antagonists of most TRP channels have not been discovered yet and they have potential targets for discovering drugs in neuroscience. In pain etiology, Ca2+ is important and it has been demonstrated in some studies that the administration of an antagonist to Ca2+ channels induces a reduction in chemotherapeutic agents-induced neuropathic pain. In the presentation, I discussed novel results of Ca2+ on the peripheral pain by the regulation of TRP channels. I concluded that the results of recent studies suggest that increased cytosolic Ca2+ has through inhibition of TRP channels main role in etiology of peripheral pain. It seems to that the TRP channels are potential target for treatment of peripheral pain.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42072456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Roles of dexmedetomidine and calcium signaling in cerebral ischemia: Focus TRP channels","authors":"Hacı Ömer Osmanlioğlu","doi":"10.37212/jcnos.610107","DOIUrl":"https://doi.org/10.37212/jcnos.610107","url":null,"abstract":"An accumulating body of evidence indicates that abnormalities of intracellular free calcium ([Ca2+]i) concentration is caused by excessive levels of reactive oxygen species (ROS) in rats with cerebral ischemia in play an important role in the pathophysiology of cerebral ischemia (Miyanohara et al. 2015; Belrose and Jackson, 2018). Ca2+ passes cell membrane via different channels such as chemical and voltage gated channels. Apart from the well-known cation channels, there is recently discovered channels namely transient receptor potential (TRP) family. The TRP superfamily is containing 7 subfamilies with 28 members in mammalian. Activation and inhibition mechanisms of the TRP channels are very different from the voltage gated calcium channels. For example, TRPM2 channel is activated by ADP-ribose and oxidative stress, but TRPV1 channel is activated several stimuli, including capsaicin and oxidative stress (Belrose and Jackson, 2018). Dexmedetomidine (DEX) is an important drug for long-term sedation in intensive care patients because it induces a rapid response and is easily controllable. There is some modulator role of DEX on the [Ca2+]i concentration in several neurons (Akpinar et al. 2016). Results of a recent study indicated that DEX induced modulator role on cerebral ischemia-induced ROS, TRPM2 and TRPV1 channel activation in hippocampus of rats. I concluded that the results of recent studies suggest that DEX treatment reduces cerebral ischemiainduced oxidative stress and intracellular Ca2+ signaling through inhibition of TRP channels. It seems to that the exact relationship between TRP channel activation and DEX in cerebral ischemia still remains to be determined.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44872714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Depression models in experimental animals","authors":"Arif Demirdaş","doi":"10.37212/JCNOS.610108","DOIUrl":"https://doi.org/10.37212/JCNOS.610108","url":null,"abstract":"Depression is a mental disorder that is estimated by the World Health Organization to affect 350 million people worldwide. But its pathogenesis and underlying mechanisms have not been understood yet. To present a satisfying explanation for the causes and treatments of these sorts of diseases animal models can be a powerful model for the researchers. Experimental animal research has been frequently used, in related with clinical studies, to test a number of hypotheses regarding the etiology of depression and its related behaviors. In the literature, experimental animal models about depression were described. These are chronic mild stress, forced swimming test, learned helplessness, tail suspension test, psycho-stimulant drug withdrawal and olfactory bulbectomy. In the oral presentation, it was summarized the experimental animal models that are used most commonly for depression, and discussed their advantages and limitations. In conclusion, it seems that some experimental animal models such as chronic mild stress and forced swimming test in several experiments have been using for investigating depression etiology and treatment and the models are very useful for searching the disease.","PeriodicalId":37782,"journal":{"name":"Journal of Cellular Neuroscience and Oxidative Stress","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44062072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}