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Role of cyclic guanosine monophosphate-adenosine monophosphate synthase-stimulator of interferon genes pathway in diabetes and its complications
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作者 Ming-Wei Fan Jin-Lan Tian +5 位作者 Tan Chen Can Zhang Xin-Ru Liu Zi-Jian Zhao Shu-Hui Zhang Yan Chen 《World Journal of Diabetes》 SCIE 2024年第10期2041-2057,共17页
Diabetes mellitus(DM)is one of the major causes of mortality worldwide,with inflammation being an important factor in its onset and development.This review summarizes the specific mechanisms of the cyclic guanosine mo... Diabetes mellitus(DM)is one of the major causes of mortality worldwide,with inflammation being an important factor in its onset and development.This review summarizes the specific mechanisms of the cyclic guanosine monophosphate-adenosine monophosphate synthase(cGAS)-stimulator of interferon genes(STING)pathway in mediating inflammatory responses.Furthermore,it compre-hensively presents related research progress and the subsequent involvement of this pathway in the pathogenesis of early-stage DM,diabetic gastroenteropathy,diabetic cardiomyopathy,non-alcoholic fatty liver disease,and other complic-ations.Additionally,the role of cGAS-STING in autonomic dysfunction and intes-tinal dysregulation,which can lead to digestive complications,has been discuss-ed.Altogether,this study provides a comprehensive analysis of the research advances regarding the cGAS-STING pathway-targeted therapeutic agents and the prospects for their application in the precision treatment of DM. 展开更多
关键词 Cyclic guanosine monophosphate-adenosine monophosphate synthase-stimulator of interferon genes Diabetes mellitus Inflammation Glycolipid metabolism Diabetes gastroenteropathy Nonalcoholic fatty liver disease Diabetes cardiovascular disease Diabetes nephropathy
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双核Pt(Ⅳ)配合物与Guanosine-5′-Monophosphate和Glutathione反应的核磁共振光谱研究(英文) 被引量:1
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作者 范大民 杨晓亮 郭子建 《无机化学学报》 SCIE CAS CSCD 北大核心 2007年第7期1206-1212,共7页
合成了一个新型的双核Pt(Ⅳ)配合物{[cis-Pt(NH3)2Cl(OH)2]2(4,4′-methylenedianiline)}(NO3)2(化合物1)及相应的15N标记化合物{[cis-Pt(15NH3)2Cl(OH)2]2(4,4′-methylenedianiline)}(NO3)2(化合物15N-1)。利用1HNMR和ESMS进行了... 合成了一个新型的双核Pt(Ⅳ)配合物{[cis-Pt(NH3)2Cl(OH)2]2(4,4′-methylenedianiline)}(NO3)2(化合物1)及相应的15N标记化合物{[cis-Pt(15NH3)2Cl(OH)2]2(4,4′-methylenedianiline)}(NO3)2(化合物15N-1)。利用1HNMR和ESMS进行了结构表征,化合物15N-1的2D[1H,15N]HSQCNMR发现,该化合物在水溶液中存在同分异构体。2D[1H,15N]HSQCNMR技术跟踪了化合物15N-1与Guanosine-5′-Monophosphate(5′-GMP)和Glutathione(GSH)的反应。结果显示,5′-GMP能在0.5h内将化合物1还原,而GSH在6h以后才能够部分的将化合物1还原。化合物1所表现出来的反应性能将有利于提高其治疗效果和降低毒副作用。 展开更多
关键词 抗肿瘤试剂 双核铂(Ⅳ)配合物 DNA guanosine-5′-monophosphate(5′-GMP) Glutathione(GSH)
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Analysis of the nitric oxide-cyclic guanosine monophosphate pathway in experimental liver cirrhosis suggests phosphodiesterase-5 as potential target to treat portal hypertension 被引量:2
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作者 Denise Schaffner Adhara Lazaro +7 位作者 Peter Deibert Peter Hasselblatt Patrick Stoll Lisa Fauth Manfred W Baumstark Irmgard Merfort Annette Schmitt-Graeff Wolfgang Kreisel 《World Journal of Gastroenterology》 SCIE CAS 2018年第38期4356-4368,共13页
AIM To investigate the potential effect of inhibitors of phosphodiesterase-5(PDE-5) for therapy of portal hypertension in liver cirrhosis.METHODS In the rat model of thioacetamide-induced liver fibrosis/cirrhosis the ... AIM To investigate the potential effect of inhibitors of phosphodiesterase-5(PDE-5) for therapy of portal hypertension in liver cirrhosis.METHODS In the rat model of thioacetamide-induced liver fibrosis/cirrhosis the nitric oxide-cyclic guanosine monophosphate(NO-cGMP) pathway was investigated. Expression and localization of PDE-5, the enzyme that converts vasodilating cGMP into inactive 5'-GMP, was in the focus of the study. Hepatic gene expression of key components of the NO-cGMP pathway was determined by qRT-PCR: Endothelial NO synthase(eNOS), inducible NO synthase(iNOS), soluble guanylate cyclase subunits α1 and β1(sGCa1, sGCb1), and PDE-5. Hepatic PDE-5 protein expression and localization were detected by immunohistochemistry. Serum cGMP concentrations were measured using ELISA. Acute effects of the PDE-5 inhibitor Sildenafil(0.1 mg/kg or 1.0 mg/kg) on portal and systemic hemodynamics were investigated using pressure transducers.RESULTS Hepatic gene expression of eNOS(2.2-fold; P = 0.003), sGCa1(1.7-fold; P = 0.003), sGCb1(3.0-fold; P = 0.003), and PDE-5(11-fold; P = 0.003) was increased in cirrhotic livers compared to healthy livers. Overexpression of PDE-5(7.7-fold; P = 0.006) was less pronounced in fibrotic livers. iNOS expression was only detected in fibrotic and cirrhotic livers. In healthy liver, PDE-5 protein was localized primarily in zone 3 hepatocytes and to a lesser extent in perisinusoidal cells. This zonation was disturbed in cirrhosis: PDE-5 protein expression in perisinusoidal cells was induced approximately 8-fold. In addition, PDE-5-expressing cells were also found in fibrous septa. Serum cGMP concentrations were reduced in rats with cirrhotic livers by approximately 40%. Inhibition of PDE-5 by Sildenafil caused a significant increase in serum cGMP concentrations [+ 64% in healthy rats(P = 0.024), + 85% in cirrhotic rats(P = 0.018)]. Concomitantly, the portal venous pressure was reduced by 19% in rats with liver cirrhosis. CONCLUSION Overexpression and abrogated zonation of PDE-5 likely contribute to the pathogenesis of cirrhotic portal hypertension. PDE-5 inhibition may therefore be a reasonable therapeutic approach for portal hypertension. 展开更多
关键词 Portal hypertension THIOACETAMIDE Nitric oxide Liver cirrhosis Cyclic guanosine monophosphate Phosphodiesterase-5 SILDENAFIL Hepatic stellate cells Metabolic zonation
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Transformation of microstructure and phase of disodium guanosine 5′-monophosphate: Thermodynamic perspectives 被引量:1
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作者 Qiao Chen Fengxia Zou +4 位作者 Pengpeng Yang Jingwei Zhou Jinglan Wu Wei Zhuang Hanjie Ying 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第10期2112-2120,共9页
Microstructure and phase transformation of disodium guanosine 5′-monophosphate(5′-GMPNa_2) are extremely important for controlling the process and understanding the mechanism of crystallization. In this work, the th... Microstructure and phase transformation of disodium guanosine 5′-monophosphate(5′-GMPNa_2) are extremely important for controlling the process and understanding the mechanism of crystallization. In this work, the thermodynamic properties of polymorphous 5′-GMPNa_2 especially the solubility were studied, the solubility results show that 5′-GMPNa_2 is more soluble in ethanol–water(E–W) than in isopropanol–water(I–W). The amorphous form of 5′-GMPNa_2 is more soluble than the crystalline form at the same mole fraction and temperature. Meanwhile, the crystalline forms and morphologies of the residual solids were characterized by PXRD and SEM. The results indicate that solid forms of 5′-GMPNa_2 transformed spontaneously from amorphous to crystalline when the ethanol proportion is ≥20%. In addition, increasing the pH facilitates the dissolution of 5′-GMPNa_2 and helps to maintain the crystalline form. The associated Gibbs free energy values were calculated to verify the trend of transformation from amorphous to crystalline 5′-GMPNa_2. These results should help to guide the industrial crystallization process and to obtain the crystalline form of 5′-GMPNa_2. 展开更多
关键词 Solid form transformation THERMODYNAMICS Disodium guanosine 5′-monophosphate SOLUBILITY CRYSTALLIZATION Intermolecular force
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Effects of plant extract neferine on cyclic adenosine monophosphate and cyclic guanosine monophosphate levels in rabbit corpus cavernosum in vitro 被引量:6
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作者 Jun Chen Ji-Hong Liu +3 位作者 Tao Wang Heng-Jun Xiao Chun-Ping Yirl Jun Yang 《Asian Journal of Andrology》 SCIE CAS CSCD 2008年第2期307-312,共6页
Aim: To further investigate the relaxation mechanism of neferine (NED, a bis-benzylisoquinoline alkaloid extracted (isolated) from the green seed embryo of Nelumbo nucifera Gaertn in China, on rabbit corpus cavern... Aim: To further investigate the relaxation mechanism of neferine (NED, a bis-benzylisoquinoline alkaloid extracted (isolated) from the green seed embryo of Nelumbo nucifera Gaertn in China, on rabbit corpus cavernosum tissue in vitro. Methods: The effects of Nef on the concentrations of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) in isolated and incubated rabbit corpus cavernosum tissue were recorded using ^125I radioimmunoassay. Results: The basal concentration of cAMP in corpus cavernosum tissue was 5.67 ± 0.97 pmol/mg. Nef increased the cAMP concentration in a dose-dependent manner (P 〈 0.05), but this effect was not inhibited by an adenylate cyclase inhibitor (cis-N-[2-phenylcyclopentyl]azacyclotridec-1-en-2-amine, MDL-12, 330A) (P 〉 0.05). The accumulation of cAMP induced by prostaglandin Et (PGEt, a stimulator of cAMP production) was also augmented by Nef in a dose-dependent manner (P 〈 0.05). The basal concentration of cGMP in corpus cavernosum tissue is 0.44 ± 0.09 pmol/mg. Nef did not affect this concentration of cGMP, either in the presence or in the absence of a guanyl cyclase inhibitor (1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one, ODQ) (P 〉 0.05). Also, sodium nitroprusside (SNP, a stimulator of cGMP production)-induced cGMP production was not enhanced by Nef (P 〉 0.05). Conclusion: Nef, with its relaxation mechanism, can enhance the concentration of cAMP in rabbit corpus cavernosum tissue, probably by inhibiting phosphodiesterase activity. (Asian JAndro12008 Mar; 10: 307-312) 展开更多
关键词 NEFERINE cyclic adenosine monophosphate cyclic guanosine monophosphate rabbit corpus cavernosum
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Existence of Heme Oxygenase-carbon Monoxide-cyclic Guanosine Monophosphate Pathway in Human Trabecular Meshwork Cells In Vitro 被引量:3
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作者 李涛 张虹 梁峰 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2004年第2期173-177,共5页
To confirm the existence of heme oxygenase (HO)-carbon monoxide (CO)- cyclic guanosine monophosphate (cGMP) pathway in the cultured human trabecular meshwork cells (HTMCs) in vitro, and to evaluate the inductive role... To confirm the existence of heme oxygenase (HO)-carbon monoxide (CO)- cyclic guanosine monophosphate (cGMP) pathway in the cultured human trabecular meshwork cells (HTMCs) in vitro, and to evaluate the inductive role of hemin on this pathway, HTMCs of the third to fourth generation were cultured in vitro. Reverse transcripase-polymerase chain reaction (RT-PCR) was employed for detection of HO-1 and HO-2 mRNA. Immunohistochemical staining was used to detect HO-1 and HO-2 proteins. Hemin was added into the culture solution. The HO-1 mRNA levels were quantified by RT-PCR. The relative amount of carbon monoxide released into the media was measured with the quantifying carbon monoxide hemoglobin (HbCO) by spectrophotometry. Radioimmunoassay was used to determine changes of cGMP in HTMCs. The results showed that cultured cells had the specific characteristics of HTMCs. Both HO-1 and HO-2 genes were expressed in HTMCs, as well as HO-1 and HO-2 proteins in HTMCs. Hemin induced HO-1 mRNA, HbCO and cGMP in a dose-dependent manner. In conclusion, HO-CO-cGMP pathway exists in the cultured HTMCs and can be induced by hemin. Pharmacological stimulation of HO-CO-cGMP pathway may constitute a novel therapeutic approach to rescuing glaucoma. 展开更多
关键词 trabecular meshwork cell culture heme oxygenase carbon monoxide guanosine 3' 5'-cyclic monophosphate (cGMP)
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Studies on Relationship between Serum Nitric Oxide and Plasma Cyclic Guanosine Monophosphate and Prolonged Bleeding after Medical Abortion as well as Prophylaxis and Treatment of Bleeding with Traditional Chinese Medicine
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作者 廖玎玲 谭布珍 +1 位作者 辛华 贺晓菊 《Journal of Reproduction and Contraception》 CAS 1999年第4期220-226,共7页
Objectives To study the relationship between serum nitric oxide (NO and plasma cyclic guanosine monophosphate (cGMP) and prolonged bleeding after medical abortion. Methods A total of 120 women having receiv... Objectives To study the relationship between serum nitric oxide (NO and plasma cyclic guanosine monophosphate (cGMP) and prolonged bleeding after medical abortion. Methods A total of 120 women having received medical abortions at random were recruited and divided into two groups: the one (Group A,n=60) taking 'Gong Fu Mixture(Uterus Recovering Mixture)' and the other (Group B,n=60) not taking it after abortion. On d 10, 20 and 30 after medical abortion, serum NO and plasma cGMP were tested before and after mifepristone administration and 10 d later by Gresis reaction method and radioimmunoassay respectively. Results NO concentration in serum and cGMP concentration in plasma decreased significantly after taking mifepristone given (P<0.05). Ten days later, the number of those with bleeding discontinuation in the group A was significantly greater than that in the group B (P<0.05). Serum NO level and plasma cGMP level in the group A decreased more significantly than those in the group B (P<0.05). Conclusion The slow decrease of serum NO and plasma cGMP is closely related to prolonged bleeding after medical abortion. “Gong Fu Mixture (uterus recovering mixture)” is effective in prevention and treatment of prolonged bleeding. 展开更多
关键词 MIFEPRISTONE Induced abortion Nitric Oxide Uterine hemorrhage Cyclic guanosine monophosphate
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磷酸二酯酶5在心力衰竭中作用的研究进展
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作者 杨洋 张雅茸 +2 位作者 杨红琴 王婧 赵红梅 《基础医学与临床》 CAS 2024年第5期724-728,共5页
磷酸二酯酶5(PDE5)是环磷酸鸟苷(cGMP)特异性水解酶,是由一氧化氮(NO)激活的可溶性鸟苷酸环化酶(sGC)靶向cGMP产生的。PDE5催化cGMP中磷酸二酯键的水解,从而将cGMP转化为无活性的5′-GMP形式,cGMP-PKG轴功能障碍将引起心脏重塑,是心力衰... 磷酸二酯酶5(PDE5)是环磷酸鸟苷(cGMP)特异性水解酶,是由一氧化氮(NO)激活的可溶性鸟苷酸环化酶(sGC)靶向cGMP产生的。PDE5催化cGMP中磷酸二酯键的水解,从而将cGMP转化为无活性的5′-GMP形式,cGMP-PKG轴功能障碍将引起心脏重塑,是心力衰竭(HF)的主要原因之一。但PDE5抑制剂治疗心力衰竭的临床疗效存在争议。本文总结了近年来PDE5在心力衰竭中的作用机制和研究进展,对未来临床应用PDE5靶向治疗心力衰竭具有重要的指导意义。 展开更多
关键词 心力衰竭 磷酸二酯酶5 磷酸二酯酶抑制剂 环磷酸鸟苷
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白花蛇舌草提取物通过AMPK/ATG5信号通路对急性胰腺炎大鼠肺损伤的保护作用机制研究
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作者 哈宗兰 马丽娜 +1 位作者 马琼 甘桂芬 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第2期348-354,共7页
目的:通过5’-单磷酸腺苷活化蛋白激酶(AMPK)/自噬相关蛋白5(ATG5)信号通路,探讨白花蛇舌草提取物减轻急性胰腺炎(AP)大鼠肺损伤的机制。方法:建立AP肺损伤大鼠模型,随机分为模型组、提取物(白花蛇舌草提取物)组、3-MA(自噬抑制剂3-甲... 目的:通过5’-单磷酸腺苷活化蛋白激酶(AMPK)/自噬相关蛋白5(ATG5)信号通路,探讨白花蛇舌草提取物减轻急性胰腺炎(AP)大鼠肺损伤的机制。方法:建立AP肺损伤大鼠模型,随机分为模型组、提取物(白花蛇舌草提取物)组、3-MA(自噬抑制剂3-甲基腺嘌呤)组、AICAR(AMPK激活剂)组、提取物+AICAR组,每组15只,另取15只大鼠作为假手术组;ELISA检测血清淀粉酶(AMY)、IL-1β、IL-6、IL-18水平;检测大鼠腹水量及肺湿/干重比(W/D);HE观察胰腺及肺组织病理损伤;Western blot检测溶酶体相关膜蛋白2(LAMP2)、自噬底物p62、IL-1β前体蛋白(pro-IL-1β)、胰蛋白酶原活化肽(TAP)、AMPK、p-AMPK、ATG5、自噬标志物LC3-Ⅱ/Ⅰ、泛素特异性蛋白酶10(UPS10)表达。结果:与假手术组相比,模型组大鼠腹水量、肺W/D、胰腺和肺组织病理损伤评分、血清AMY、IL-1β、IL-6、IL-18水平、胰腺组织p62、TAP、pro-IL-1β表达、肺组织pAMPK/AMPK、ATG5、LC3-Ⅱ/Ⅰ、UPS10、pro-IL-1β表达均升高(P<0.05),胰腺和肺组织LAMP2蛋白表达降低(P<0.05);模型大鼠经白花蛇舌草提取物或自噬抑制剂3-MA干预后,上述指标均得到显著改善(P<0.05),且白花蛇舌草提取物的改善效果优于3-MA(P<0.05);而AMPK激活剂AICAR可削弱白花蛇舌草提取物对AP大鼠肺损伤的改善作用(P<0.05)。结论:白花蛇舌草提取物可通过抑制AMPK/ATG5信号通路减轻炎症反应、降低自噬水平改善AP大鼠肺损伤。 展开更多
关键词 白花蛇舌草提取物 胰腺炎 肺损伤 5’-单磷酸腺苷活化蛋白激酶 自噬相关蛋白5 炎症-自噬
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Diabetes and inflammatory diseases:An overview from the perspective of Ca^(2+)/3'-5'-cyclic adenosine monophosphate signaling 被引量:2
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作者 Leandro Bueno Bergantin 《World Journal of Diabetes》 SCIE 2021年第6期767-779,共13页
A large amount of evidence has supported a clinical link between diabetes and inflammatory diseases,e.g.,cancer,dementia,and hypertension.In addition,it is also suggested that dysregulations related to Ca^(2+)signalin... A large amount of evidence has supported a clinical link between diabetes and inflammatory diseases,e.g.,cancer,dementia,and hypertension.In addition,it is also suggested that dysregulations related to Ca^(2+)signaling could link these diseases,in addition to 3'-5'-cyclic adenosine monophosphate(cAMP)signaling pathways.Thus,revealing this interplay between diabetes and inflammatory diseases may provide novel insights into the pathogenesis of these diseases.Publications involving signaling pathways related to Ca^(2+)and cAMP,inflammation,diabetes,dementia,cancer,and hypertension(alone or combined)were collected by searching PubMed and EMBASE.Both signaling pathways,Ca^(2+)and cAMP signaling,control the release of neurotransmitters and hormones,in addition to neurodegeneration,and tumor growth.Furthermore,there is a clear relationship between Ca^(2+)signaling,e.g.,increased Ca^(2+)signals,and inflammatory responses.cAMP also regulates pro-and anti-inflammatory responses.Due to the experience of our group in this field,this article discusses the role of Ca^(2+)and cAMP signaling in the correlation between diabetes and inflammatory diseases,including its pharmacological implications.As a novelty,this article also includes:(1)A timeline of the major events in Ca^(2+)/cAMP signaling;and(2)As coronavirus disease 2019(COVID-19)is an emerging and rapidly evolving situation,this article also discusses recent reports on the role of Ca^(2+)channel blockers for preventing Ca^(2+)signaling disruption due to COVID-19,including the correlation between COVID-19 and diabetes. 展开更多
关键词 DIABETES Cancer Hypertension DEMENTIA Ca^(2+)/3'-5'-cyclic adenosine monophosphate signaling Ca^(2+)channel blockers PHARMACOTHERAPY NEURODEGENERATION COVID-19
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A unique insertion of low complexity amino acid sequence underlies protein-protein interaction in human malaria parasite orotate phosphoribosyltransferase and orotidine 5'-monophosphate decarboxylase 被引量:1
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作者 Waranya Imprasittichai Sittiruk Roytrakul +1 位作者 Sudaratana R.Krungkrai Jcrapan Krungkrai 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2014年第3期184-192,共9页
Objective:To investigate the multienzyine complex formation of human malaria parasite Plasmodium falciparum[P.falciparum)orotate phosphoribosyltransferase(OPRT)and orotidine5'-monophosphate decarboxylase(OMPDC),th... Objective:To investigate the multienzyine complex formation of human malaria parasite Plasmodium falciparum[P.falciparum)orotate phosphoribosyltransferase(OPRT)and orotidine5'-monophosphate decarboxylase(OMPDC),the fifth and sixth enzyme of the de novo pyrimidine biosynthetic palhway.Previously,we have clearly established that the two enzymes in the malaria parasite exist physically as a heterotetrameric(OPRT)_2(OMPDG)_2 complex containing two subunits each of OPRT and OMPDC.and that the complex have catalytic kinetic advantages over the monofunetional enzyme.Methods:Both enzymes were cloned and expressed as recombinant proteins.The protein-protein interaction in the enzyme complex was identified using bifunctionul chemical cross-linker,liquid chromatography-mass spectrometric analysis and homology modeling,Results:The unique insertions of low complexity region at the a 2 and a 5 helices of the parasite OMPDC,characterized by single amino acid repeat sequence which was not found in homologous proteins from other organisms,was located on the OPRT-OMPDC interface.The structural models for the protein-prolein interaction of the helerotetrameric(OPRT)_2(OMPDC)_2multienzyme complex were proposed.Conclusions:Based on the proteomic data and structural modeling,it is surmised that the human malaria parasite low complexity region is responsible for the OPRT-OMPDC interaction.The structural complex of the parasite enzymes,thus,represents an efficient functional kinetic advantage,which in line with co-localization principles of evolutional origin,and allosteric control in protein-protein-interactions. 展开更多
关键词 Malaria PLASMODIUM FALCIPARUM PYRIMIDINE biosynthesis Orotate PHOSPHORIBOSYLTRANSFERASE Orotidine 5’-monophosphate DECARBOXYLASE Multienzyme complex Proteomics
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Cloning of le-pyrG, an Orotidine-5'-monophosphate Decarboxylase Encoding Gene from Lentinula edodes 被引量:1
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作者 BAO Dapeng FENG Aiping +4 位作者 ZHANG Meiyan TAN Qi CHEN Mingjie NIU Liying PAN Yingjie 《食用菌学报》 北大核心 2009年第2期17-20,共4页
关键词 食用菌 栽培技术 基因 克隆技术
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Study on disulfur-backboned nucleic acids:Part Ⅳ.Efficient synthesis of 3',5'-dithio-2'-deoxyguanosine
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作者 Pei Hua Shang Chang Mei Cheng +2 位作者 Hua Wang Hong Chao Zheng Yu Fen Zhao 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第2期131-134,共4页
An efficient and novel method for synthesizing 3′,5′-dithio-2′-deoxyguanosine was described.In this method normal guanosine was used as the starting material.A very efficient procedure was used to synthesize 2-O-to... An efficient and novel method for synthesizing 3′,5′-dithio-2′-deoxyguanosine was described.In this method normal guanosine was used as the starting material.A very efficient procedure was used to synthesize 2-O-tosylguanosine 1,which used 0.1 eq.DBTO instead of 2 eq.1 was treated with LTBH to give 9-(2-deoxy-β-D-threo-pentofuranosyl)guanine 2.2 could be easily turned to the target compound. 展开更多
关键词 3′ 5′-Dithio-2′-deoxyguanosine guanosine SYNTHESIS
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基于恒电位法快速测定肉汤中5'-鸟苷酸
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作者 于颖 李明洋 +2 位作者 王笑丹 盖圣美 刘登勇 《食品安全质量检测学报》 CAS 北大核心 2023年第5期94-100,共7页
目的 建立一种基于电化学参数分析的恒电位仪系统用于快速准确低成本地检测5’-鸟苷酸。方法 以Ru(bpy)22+/SMWCNTs/Au复合材料修饰的玻碳电极为媒介,筛选出与电子发生还原反应的靛蓝作为显色剂,研究了溶液pH和靛蓝添加量体积比对靛蓝... 目的 建立一种基于电化学参数分析的恒电位仪系统用于快速准确低成本地检测5’-鸟苷酸。方法 以Ru(bpy)22+/SMWCNTs/Au复合材料修饰的玻碳电极为媒介,筛选出与电子发生还原反应的靛蓝作为显色剂,研究了溶液pH和靛蓝添加量体积比对靛蓝电化学还原性能的影响,经过条件优化后构建一种使靛蓝脱色生成隐色体靛白的双电极体系恒电位装置。结果 在最佳检测条件下,当5’-鸟苷酸线性范围在0~0.6 mmol/L时,靛蓝脱色率随5’-鸟苷酸浓度的增大而呈线性上升(r^(2)=0.9614),该方法在肉汤样品中5’-鸟苷酸的检测过程中,显示出与电化学传感器技术高度相似的结果。结论 本方法能够有效地在实际应用过程中现场检测鲜味核苷酸,因其操作简便、便携微型化,在未来的食品质量检测领域将具有较大的市场优势与应用价值。 展开更多
关键词 恒电位法 5’-鸟苷酸 电化学传感技术 快速检测
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青蒿琥酯调节cGAS-STING信号通路对抑郁症模型小鼠神经炎性反应的影响
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作者 高超 张润菡 +3 位作者 王伟 赵曼婷 焦艳 李喆 《基础医学与临床》 CAS 2024年第8期1126-1132,共7页
目的探讨青蒿琥酯(ART)调节环磷酸鸟苷-腺苷酸合成酶(cGAS)-干扰素基因刺激因子(STING)通路对抑郁症小鼠神经炎性反应的影响。方法小鼠分为模型组、对照组、ART低剂量组、ART高剂量组、氟西汀组、ART高剂量+RocA(cGAS-STING通路激活剂)... 目的探讨青蒿琥酯(ART)调节环磷酸鸟苷-腺苷酸合成酶(cGAS)-干扰素基因刺激因子(STING)通路对抑郁症小鼠神经炎性反应的影响。方法小鼠分为模型组、对照组、ART低剂量组、ART高剂量组、氟西汀组、ART高剂量+RocA(cGAS-STING通路激活剂)组。糖水消耗实验、强迫游泳实验评估小鼠的抑郁行为;HE染色检测海马组织病理变化;ELISA检测白细胞介素(IL)-6、肿瘤坏死因子-α(TNF-α)、五羟色胺(5-HT)、多巴胺(DA)水平;TUNEL染色检测神经元凋亡;Western blot检测Bcl-2相关X蛋白(Bax)、p53、cGAS、STING蛋白。结果与对照组相比,模型组小鼠表现出神经元性脓疱变性,糖水消耗率、5-HT、DA水平降低,强迫游泳静止时间延长,IL-6、TNF-α水平、神经元凋亡率及Bax、p53、cGAS、STING蛋白表达升高(P<0.05);与模型组相比,ART低剂量组、ART高剂量组、氟西汀组小鼠海马神经元损伤有所缓解,糖水消耗率、5-HT、DA水平升高,强迫游泳静止时间缩短,IL-6、TNF-α水平、神经元凋亡率及Bax、p53、cGAS、STING蛋白表达降低(P<0.05);RocA逆转了高剂量ART对小鼠抑郁症的改善作用。结论ART抑制抑郁症小鼠神经炎性反应及神经元凋亡,上调胺类神经递质水平的机制可能与阻断cGAS-STING通路有关。 展开更多
关键词 青蒿琥酯 环磷酸鸟苷-腺苷酸合成酶-干扰素基因刺激因子通路 抑郁症 炎性反应 凋亡
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基于“肾脑相济”理论探讨艾灸对阿尔茨海默病大鼠海马AMPK/mTOR信号通路的影响
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作者 王琳 朱才丰 +1 位作者 王丽 贾玉梅 《安徽中医药大学学报》 CAS 2024年第3期42-47,共6页
目的观察艾灸对阿尔茨海默病(Alzheimer’s disease,AD)大鼠腺苷酸活化蛋白激酶(adenosine 5-monophosphate activated protein kinase,AMPK)/雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)信号通路相关递质表达的影响,探讨艾灸... 目的观察艾灸对阿尔茨海默病(Alzheimer’s disease,AD)大鼠腺苷酸活化蛋白激酶(adenosine 5-monophosphate activated protein kinase,AMPK)/雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)信号通路相关递质表达的影响,探讨艾灸治疗AD的作用机制。方法将SD大鼠按照随机数字表法分为正常组8只、模型组32只,采取侧脑室注射β淀粉样蛋白(amyloidβ-protein,Aβ)_(25-35)的方法建立大鼠AD模型。将模型复制成功的大鼠随机分为模型组、药物组、艾灸组,每组8只。艾灸组大鼠用艾条灸“百会”“肾俞”“三阴交”,每次15 min,同时按3 mg/kg灌胃蒸馏水;药物组大鼠按3 mg/kg灌胃盐酸多奈哌齐;对照组及模型组大鼠按3 mg/kg灌胃蒸馏水。采用Morris水迷宫法检测大鼠行为学表现,苏木精—伊红染色法观察大鼠海马病理组织改变,Western blot法检测大鼠海马磷酸化雷帕霉素靶蛋白(phosphorylated mammalian target of rapamycin,p-mTOR)、核糖体蛋白S6激酶(ribosomal protein S6 kinase p70,P70S6K)、自噬相关基因5(autophagy-related gene 5,ATG5)、磷酸化腺苷酸活化蛋白激酶(phosphorylated adenosine 5-monophosphate activated protein kinase,p-AMPK)、微管相关蛋白1轻链3B(microtubule associated protein light chain 3B,LC3B)-Ⅱ/LC3B-Ⅰ的表达水平。结果苏木精—伊红染色结果表明,模型组海马神经元萎缩明显,与模型组比较,药物组和艾灸组海马神经元形态及分化程度均有明显改善。与正常组比较,模型组大鼠的逃避潜伏期显著延长(P<0.05),p-mTOR及P70S6K表达水平均显著升高(P<0.05),ATG5、LC3B-Ⅱ/LC3B-Ⅰ、p-AMPK表达水平均显著降低(P<0.05)。与模型组比较,药物组和艾灸组大鼠的逃避潜伏期均显著缩短(P<0.05),p-mTOR及P70S6K表达水平均显著下降(P<0.05),ATG5、LC3B-Ⅱ/LC3B-Ⅰ、p-AMPK表达水平均显著上升(P<0.05)。与药物组比较,艾灸组大鼠逃避潜伏期显著缩短(P<0.05);p-mTOR及P70S6K表达水平显著降低(P<0.05),ATG5、LC3B-Ⅱ/LC3B-Ⅰ、p-AMPK表达水平均显著上升(P<0.05)。结论艾灸能够调控AMPK/mTOR信号通路,诱导细胞自噬,阻断脑内Aβ表达,从而改善认知功能。 展开更多
关键词 阿尔茨海默病 艾灸 自噬 海马 腺苷酸活化蛋白激酶 雷帕霉素靶蛋白
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高良姜素减轻乙型病毒性肝炎模型大鼠的炎性反应
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作者 王维 穆宝龙 +3 位作者 张文双 吴清雷 张慧慧 曹智丽 《基础医学与临床》 CAS 2024年第11期1551-1556,共6页
目的探讨高良姜素(Gal)对乙型病毒性肝炎(乙肝)大鼠炎性反应的影响。方法大鼠随机分为对照组、乙肝组[尾静脉注射乙型肝炎病毒(HBV)]、Gal低(Gal-L)和高剂量(Gal-H)组、阳性药拉米夫定组、Gal-H+AMPK抑制剂(compound C)组,每组12只。造... 目的探讨高良姜素(Gal)对乙型病毒性肝炎(乙肝)大鼠炎性反应的影响。方法大鼠随机分为对照组、乙肝组[尾静脉注射乙型肝炎病毒(HBV)]、Gal低(Gal-L)和高剂量(Gal-H)组、阳性药拉米夫定组、Gal-H+AMPK抑制剂(compound C)组,每组12只。造模后进行药物处理,给药1次/d,持续8周。检测血清中谷丙转氨酶(ALT)、总胆红素(TBIL)、谷草转氨酶(AST)水平;HE染色检测肝组织病理变化;TUNEL染色检测细胞凋亡;染色质免疫共沉淀检测HBV病毒载量;ELISA检测肝组织中单核细胞趋化蛋白-1(MCP-1)、白细胞介素(IL-12)、肿瘤坏死因子-α(TNF-α)水平;Western blot检测天冬氨酸特异性半胱氨酸蛋白酶-3(caspase-3)、Bcl-2相关X蛋白(Bax)、p-AMPK、SIRT1蛋白表达。结果与乙肝组比较,Gal-L组、Gal-H组、拉米夫定组肝脏损伤减轻,血清中AST、TBIL、ALT水平降低,肝组织中细胞凋亡率、HBV病毒载量、MCP-1、IL-12、TNF-α水平及caspase-3、Bax蛋白降低,p-AMPK、SIRT1蛋白升高(P<0.05);Compound C减弱了高剂量Gal对乙肝大鼠肝组织中炎性反应、细胞凋亡及HBV病毒载量的抑制作用。结论Gal抑制乙肝大鼠炎性反应的机制可能与上调AMPK/SIRT1通路有关。 展开更多
关键词 高良姜素 腺苷酸活化蛋白激酶/沉默信息调节因子1(AMPK/SIRT1)通路 乙肝 肝损伤 炎性反应
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香菇多糖对ApoE^(-/-)小鼠动脉粥样硬化斑块形成及AMPK信号通路的影响
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作者 郑学斌 黄玉艳 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第7期1411-1415,共5页
目的:探讨香菇多糖(LNT)对ApoE^(-/-)小鼠动脉粥样硬化(AS)斑块形成及单磷酸腺苷活化蛋白激酶(AMPK)信号通路的影响。方法:ApoE^(-/-)小鼠分为模型组、立普妥组(5 mg/kg)、LNT低(5 mg/kg)、中(10 mg/kg)、高(20 mg/kg)剂量组,以相似遗... 目的:探讨香菇多糖(LNT)对ApoE^(-/-)小鼠动脉粥样硬化(AS)斑块形成及单磷酸腺苷活化蛋白激酶(AMPK)信号通路的影响。方法:ApoE^(-/-)小鼠分为模型组、立普妥组(5 mg/kg)、LNT低(5 mg/kg)、中(10 mg/kg)、高(20 mg/kg)剂量组,以相似遗传背景的C57BL/6小鼠为对照组。灌胃给药12周后,全自动生化分析仪检测血清甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白(LDL-C)、高密度脂蛋白(HDL-C)水平;ELISA检测血清IL-6、IL-1β水平;油红O染色观察整体主动脉斑块形成情况;HE染色观察主动脉根部斑块形成情况;蛋白免疫印迹检测主动脉AMPK通路蛋白表达。结果:与对照组比较,模型组血清TC、TG、LDL-C、IL-6、IL-1β水平、主动脉斑块面积、主动脉根部斑块面积、主动脉组织NLRP3、IL-6、IL-1β表达显著升高,主动脉组织p-AMPK/AMPK表达和血清HDL-C水平降低(P<0.05);与模型组比较,立普妥组、LNT中、高剂量组TC、TG、LDL-C、IL-6、IL-1β、主动脉斑块面积、主动脉根部斑块面积、主动脉组织NLRP3、IL-6、IL-1β表达显著降低,主动脉组织p-AMPK/AMPK表达和血清HDL-C水平显著升高,且LNT各剂量组间差异有统计学意义(P<0.05);立普妥组与LNT高剂量组差异无统计学意义(P>0.05)。结论:LNT可能通过激活AMPK通路抑制AS小鼠炎症反应和AS斑块形成。 展开更多
关键词 香菇多糖 ApoE^(-/-)小鼠 动脉粥样硬化 单磷酸腺苷活化蛋白激酶
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环磷酸腺苷和环磷酸鸟苷在植物生长发育中的作用 被引量:1
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作者 翟昭慈 刘新月 +1 位作者 刘志国 刘孟军 《河北农业大学学报》 CAS CSCD 北大核心 2024年第1期1-8,共8页
环磷酸腺苷(cAMP)和环磷酸鸟苷(cGMP)是植物体内发挥重要作用的2种活性物质,作为第二信使或关键信号分子参与并调节了植物各种生理生化反应,具有很大的利用价值和应用前景。本文系统地对环磷酸腺苷和环磷酸鸟苷在种子萌发、植物生长发... 环磷酸腺苷(cAMP)和环磷酸鸟苷(cGMP)是植物体内发挥重要作用的2种活性物质,作为第二信使或关键信号分子参与并调节了植物各种生理生化反应,具有很大的利用价值和应用前景。本文系统地对环磷酸腺苷和环磷酸鸟苷在种子萌发、植物生长发育、应答生物和非生物胁迫等方面的作用进行了综述,旨在为其进一步深入研究与开发利用提供参考。 展开更多
关键词 CAMP CGMP 植物 生长发育
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离子色谱法测定增味剂中的5′-肌苷酸二钠和5′-鸟苷酸二钠 被引量:14
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作者 陈青川 牟世芬 侯小平 《色谱》 CAS CSCD 北大核心 1999年第3期290-292,共3页
建立了增味剂中5′-肌苷酸二钠和5′-鸟苷酸二钠的离子色谱分析方法。采用lonPacASll阴离子交换色谱柱,以20mmol/LNa2CO3一体积分数为15%的甲醇溶液为淋洗液,检测波长254um。方法已用于实际样品的测定。
关键词 离子色谱法 5′-肌苷酸二钠 5′-鸟苷酸二钠 增味剂
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