The Open Physiology Journal最新文献

筛选
英文 中文
Effects of Light With Reduced Short Wavelength Components on Parameters of Circadian Rhythm and Performance in an Experimental Night Shift Model 减少短波分量的光对实验夜班模型中昼夜节律参数和性能的影响
The Open Physiology Journal Pub Date : 1900-01-01 DOI: 10.2174/1874360900801010034
G. Hoffmann, V. Leichtfried, A. Griesmacher, C. Bartenbach, M. Canazei, S. Staggl, W. Schobersberger
{"title":"Effects of Light With Reduced Short Wavelength Components on Parameters of Circadian Rhythm and Performance in an Experimental Night Shift Model","authors":"G. Hoffmann, V. Leichtfried, A. Griesmacher, C. Bartenbach, M. Canazei, S. Staggl, W. Schobersberger","doi":"10.2174/1874360900801010034","DOIUrl":"https://doi.org/10.2174/1874360900801010034","url":null,"abstract":"Shift work is associated with alterations in physiological circadian patterns resulting in chronic diseases, e.g. cardiovascular disorders or major depression. The intensity and spectral composition of light is known to affect the 24 h- rhythm of our body. We investigated the effects of two different lighting environments on parameters of circadian rhythm and performance in healthy volunteers during an experimental night shift. Test light with a low color temperature was compared to normal light with a higher color temperature. Melatonin synthesis, red and white blood count, blood pressure, heart rate and indicators of performance were analyzed. Nocturnal increases in melatonin were more pronounced under low color temperature lighting conditions. This was not associated with limited degrees of arousal or vigilance. Mainte- nance of a normal nocturnal rhythm of melatonin with adapted illumination may provide a benefit for employees well- being without affecting their productivity.","PeriodicalId":331207,"journal":{"name":"The Open Physiology Journal","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128268556","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}
引用次数: 5
Androgen Receptor Expression and Function in Osteoclasts 雄激素受体在破骨细胞中的表达和功能
The Open Physiology Journal Pub Date : 1900-01-01 DOI: 10.2174/1874360900901010028
R. Davey, A. Notini, W. Chiu, J. Hodge, G. Nicholson, J. Zajac, A. Turner
{"title":"Androgen Receptor Expression and Function in Osteoclasts","authors":"R. Davey, A. Notini, W. Chiu, J. Hodge, G. Nicholson, J. Zajac, A. Turner","doi":"10.2174/1874360900901010028","DOIUrl":"https://doi.org/10.2174/1874360900901010028","url":null,"abstract":"We assessed androgen receptor (AR) expression in osteoclasts in vitro and in situ. Rat multinucleated osteo- clasts expressed detectable AR protein in situ, and AR mRNA was detected in mouse and human derived osteoclast-like cells in vitro. Dihydrotestosterone treatment did not affect human osteoclast-like cell formation or resorption in vitro.","PeriodicalId":331207,"journal":{"name":"The Open Physiology Journal","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133015440","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}
引用次数: 7
Radiobiological Study of Retinal Microvessel Proliferation in Diabetic-like Rat Model 糖尿病样大鼠视网膜微血管增殖的放射生物学研究
The Open Physiology Journal Pub Date : 1900-01-01 DOI: 10.2174/1874360900801010044
X. Mao, P. Archambeau, Waheed Baqai, S. Larsen, J. Archambeau
{"title":"Radiobiological Study of Retinal Microvessel Proliferation in Diabetic-like Rat Model","authors":"X. Mao, P. Archambeau, Waheed Baqai, S. Larsen, J. Archambeau","doi":"10.2174/1874360900801010044","DOIUrl":"https://doi.org/10.2174/1874360900801010044","url":null,"abstract":"Progressive evolution of retinal vascular in diabetic retinopathy leads to blindness in up to 8,000 patients yearly. The major purpose of this investigation was to determine proton radiation dose response of the eye's retinal vascu- lature in the hypergalactosemia induced rat model of diabetic-like retinopathy and gain insight of possible role of proton radiotherapy in controlling diabetic retinopathy. A single dose range of proton radiation (8, 14, and 20 Gy) was delivered to one eye of each rat at 4 months following induction of hypergalactosemia. The opposite eye of each rat, which was not irradiated, showed normal progression of retinopathy. Stereologic techniques were used to quantify tissue parameters in situ in a retinal digest preparation that allowed unobstructed access to the vasculature. 15 months following 50% galactose diet, characteristic histopathological lesions of retinopathy such as capillary endothelial cell proliferation, capillary clo- sure, capillary microaneurysms, pericyte loss developed in non-irradiated eyes. The endothelial cell densities for rat re- ceiving 50% galactose diet were significantly higher than that of control (p<0.05). Proton irradiation inhibited significant endothelial cell proliferation at dose from 14Gy to 20Gy (p<0.05), yet not diminished pericyte loss at current dose sched- ule. These findings indicated beneficial effects of proton radiation on hypergalactosemia induced diabetic-like retinopa- thy. Our study should have an impact on further studies to optimize radiation treatment strategies for diabetic retinopathy.","PeriodicalId":331207,"journal":{"name":"The Open Physiology Journal","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127760818","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}
引用次数: 0
Neuroprotective Effect of Melatonin on Glucocorticoid Toxicity in the Rat Hippocampus 褪黑素对大鼠海马糖皮质激素毒性的神经保护作用
The Open Physiology Journal Pub Date : 1900-01-01 DOI: 10.2174/1874360900801010023
Analía M. Furio, Ramiro Fontão, N. Falco, J. Ruiz, R. Caccuri, D. Cardinali
{"title":"Neuroprotective Effect of Melatonin on Glucocorticoid Toxicity in the Rat Hippocampus","authors":"Analía M. Furio, Ramiro Fontão, N. Falco, J. Ruiz, R. Caccuri, D. Cardinali","doi":"10.2174/1874360900801010023","DOIUrl":"https://doi.org/10.2174/1874360900801010023","url":null,"abstract":"Dexamethasone has a neurotoxic action on rodent hippocampus. The objective of this study was to examine the extent of neuroprotection exerted by melatonin on that neurotoxic effect. A group of 24 rats received 9 daily subcutaneous injections of 0.5 mg/kg of dexamethasone. Half of them received 25 μg/ml of melatonin in the drinking water for 10 days. Controls included rats injected with vehicle or rats injected with vehicle plus melatonin in the drinking water. At the end of treatment, the brains were processed for a morphometric analysis, the results being expressed as percent number of ab- normal hipoccampal neurons (defined as necrotic cells) per field. Melatonin decreased by 77 % the effect of dexametha- sone (p< 0.001). A laterality of neurotoxic effect of dexamethasone was apparent in rats that did not receive melatonin (percent of necrotic cells in left and right hippocampus: 32.0 ± 4.4 and 19.6 ± 1.9 %, respectively, p< 0.01). The results indicate a protective effect of melatonin on glucocorticoid neurotoxicity in the rat hippocampus.","PeriodicalId":331207,"journal":{"name":"The Open Physiology Journal","volume":"71 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120895832","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}
引用次数: 16
Melatonin Beyond Its Classical Functions 褪黑素超越其经典功能
The Open Physiology Journal Pub Date : 1900-01-01 DOI: 10.2174/1874360900801010001
R. Hardeland, B. Poeggeler
{"title":"Melatonin Beyond Its Classical Functions","authors":"R. Hardeland, B. Poeggeler","doi":"10.2174/1874360900801010001","DOIUrl":"https://doi.org/10.2174/1874360900801010001","url":null,"abstract":"The perception of melatonin as a mediator of darkness, formed in a circadian fashion, circulating in subnano- molar concentrations, and removed as 6-sulfatoxymelatonin, reflects only a sector within a spectrum of actions. This ubiquitous compound present in bacteria and eucaryotes is exceptionally pleiotropic, in terms of binding proteins, receptor distribution, G protein coupling, electron-exchange reactions, and secondary effects by metabolites, such as 5- methoxytryptamine and methoxylated kynuramines. Membrane receptors are located, e.g., in the vertebrate suprachias- matic nucleus, pars tuberalis, brain, vasculature, and leukocytes. Binding proteins include quinone reductase 2, ROR/RZR transcription factors, calmodulin, calreticulin, nuclear and mitochondrial proteins. Actions via hormonal subsystems, growth factors, neurotransmission and immune system lead to further secondary effects. Single-electron transfer reactions are basis of radical scavenging, non-enzymatic metabolism and interactions with electron transport systems. The metabo- lite, N 1 -acetyl-5-methoxykynuramine, is a potent inhibitor of prostaglandin synthesis and of neuronal NO synthase, an NO scavenger and a mitochondrial modulator.","PeriodicalId":331207,"journal":{"name":"The Open Physiology Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120858865","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}
引用次数: 58
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信