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Antineoplastic Effect of Calcium Channel Blocker-Verapamil and 5-Fluorouracil Intraperitoneal Chemotherapy on Hepatocarcinoma-Bearing Rats
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作者 曹天生 史海安 周亚魁 《The Chinese-German Journal of Clinical Oncology》 CAS 2002年第2期84-87,共4页
Objective To study the antineoplastic effect of the calcium channel blocker verapamil and 5-fluorouracil intraperitoneal chemotherapy onhepatocarcinoma-bearing rats, and examine the action between calcium channel bloc... Objective To study the antineoplastic effect of the calcium channel blocker verapamil and 5-fluorouracil intraperitoneal chemotherapy onhepatocarcinoma-bearing rats, and examine the action between calcium channel blockers and cytotoxic drugs.Methods We adopted the method of subcapsular implantation of carcinoma tissues of walker-256 in the left liver lobe as a model of livercarcinoma-bearing rats. All experimental animals were divided into four groups. On the sixth day post implantation, in group A (controlgroup) 6 ml of saline was injected intraperitoneally once a day for 3 days. In group B (single chemotherapy group) 6 ml of 5-Fu 75 mg/kg was injected intraperitoneally once a day for 3 days. In group C (combination of treatment group) both 5-Fu (75 mg/kg) and verapamil(25 mg/kg) were administered simultaneously as in A and B. In group D (simple verapamil group) only 6 ml of verapamil (25 mg/kg)was administered as above.Results Compared with groups A, B and D, The volume of cancer and the contents of liver cancer DNA and protein were significantlyreduced. The rates of inhibiting cancer (89.9% in group C and 35.4% in group B) were significantly increased in group C. Group C hadsignificantly long survival time compared to groups A, B and D ( P < 0.05) . By light microscopy, a number of focal necroses were foundin cancer tissue in group C.Conclusion Calcium channel blockers can enhance the antineoplastic effect of 5-Fu intraperitoneal chemotherapy to liver cancer ; Theuse of verapamil can not increase the toxicity of 5-Fu. 展开更多
关键词 calcium channel blockers VERAPAMIL 5-FLUOROURACIL HEPATOCARCINOMA intraperitoneal chemotherapy
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Calcium channel blockers and Alzheimer's disease 被引量:2
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作者 Yi Tan Yulin Deng Hong Qing 《Neural Regeneration Research》 SCIE CAS CSCD 2012年第2期137-140,共4页
Alzheimer's disease is characterized by two pathological hallmarks: amyloid plaques and neurofibrillary tangles. In addition, calcium homeostasis is disrupted in the course of human aging Recent research shows that ... Alzheimer's disease is characterized by two pathological hallmarks: amyloid plaques and neurofibrillary tangles. In addition, calcium homeostasis is disrupted in the course of human aging Recent research shows that dense plaques can cause functional alteration of calcium signals in mice with Alzheimer's disease. Calcium channel blockers are effective therapeutics for treating Alzheimer's disease. This review provides an overview of the current research of calcium channel blockers involved in Alzheimer's disease theraov. 展开更多
关键词 Alzheimer's disease caic-ium channel calcium homeostasis Alzheimer's diseasepathogenesis Β-AMYLOID calcium channel blocker
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Calcium Channel Blockers《钙离子阻断剂》
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作者 苏定冯 《中国药理学通报》 CAS CSCD 北大核心 2005年第2期140-140,共1页
关键词 阻断剂 钙通道 对抗药 慢通道 凝血因子Ⅳ 钙离子 calcium channel blockers
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Calcium channel blocker monotherapy versus combination with reninangiotensin system inhibitors on the development of new-onset diabetes mellitus in hypertensive Korean patients 被引量:3
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作者 Yong Hoon Kim Ae-Young Her +16 位作者 Seung-Woon Rha Byoung Geol Choi Se Yeon Choi Jae Kyeong Byun Yoonjee Park Dong Oh Kang Won Young Jang Woohyeun Kim Woong Gil Choi Tae Soo Kang Jihun Ahn Sang-Ho Park Ji Young Park Min-Ho Lee Cheol Ung Choi Chang Gyu Park Hong Seog Seo 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2019年第6期439-447,共9页
Background In real practice, two or more antihypertensive drugs are needed to achieve target blood pressure. We investigated the comparative beneficial actions of combination therapy of renin-angiotensin system inhibi... Background In real practice, two or more antihypertensive drugs are needed to achieve target blood pressure. We investigated the comparative beneficial actions of combination therapy of renin-angiotensin system inhibitors (RASI), with calcium channel blockers (CCB) over CCB monotherapy on the development of new-onset diabetes mellitus (NODM) in Korean patients during four-year follow-up periods. Methods A total of 3208 consecutive hypertensive patients without a history of diabetes mellitus who had been prescribed CCB were retrospectively enrolled from January 2004 to December 2012. These patients were divided into the two groups according to the additional use of RASI (the RASI group, n = 1221 and the no RASI group, n = 1987). Primary endpoint was NODM, defined as a fasting blood glucose ≥ 126 mg/dL or hemoglobin A1c ≥ 6.5%. Secondary endpoint was major adverse cardiac events (MACE) defined as total death, myocardial infarction (MI) and percutaneous coronary intervention (PCI). Results After propensity score-matched (PSM) analysis, two propensity- matched groups (939 pairs, n = 1878, C-statistic = 0.743) were generated. The incidences of NODM (HR = 1.009, 95% CI: 0.700–1.452, P = 0.962), MACE (HR = 0.877, 95% CI: 0.544–1.413, P = 0.589), total death, MI, PCI were similar between the two groups after PSM during four years. Conclusions The use of RASI in addition to CCB showed comparable incidences of NODM and MACE compared to CCB monotherapy in non-diabetic hypertensive Korean patients during four-year follow-up period. However, large-scaled randomized controlled clinical trials will be required for a more definitive conclusion. 展开更多
关键词 calcium channel blocker Diabetes mellitus RENIN-ANGIOTENSIN system INHIBITORS
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Endothelin receptor antagonist combined with a calcium channel blocker attenuates renal injury in spontaneous hypertensive rats with diabetes
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作者 陈靖 顾勇 +4 位作者 林凡 杨海春 朱蔚钰 马骥 林善锬 《Chinese Medical Journal》 SCIE CAS CSCD 2002年第7期972-978,142,共7页
OBJECTIVE: To investigate the effects of the mixed endothelin receptor antagonist, bosentan, combined with the long-acting calcium channel blocker, amlodipine, compared to the angiotensin-converting enzyme inhibitor, ... OBJECTIVE: To investigate the effects of the mixed endothelin receptor antagonist, bosentan, combined with the long-acting calcium channel blocker, amlodipine, compared to the angiotensin-converting enzyme inhibitor, cilazapril, on the progressive renal injury in spontaneous hypertensive rats (SHR) with diabetes. METHODS: Diabetic hypertensive rats (SHR-DM) were induced by streptozotozin injected in male SHR (7-week-old),and divided into an untreated and three treated groups: 1) cilazapril treated group; 2) bosentan+amlodipine treated group; and 3) amlodipine treated group. Wistar Kyoto rats (WKY) and SHR rats served as normotensive and hypertensive control, respectively. The mean arterial blood pressure, renal function, endothelin and angiotensin II levels as well as the protein expression of renal extracellular matrix components and transforming growth factor (TGF)-beta1 were determined at the end of the 4th week. RESULTS: Mean arterial blood pressure significantly increased in SHR and SHR-DM rats compared to WKY rats. All the therapies reduced the blood pressure to normal levels. However, the enhanced urinary protein excretion, the decreased creatinine clearance as well as the increased plasma and intrarenal endothelin and angiotens in II levels were found in the untreated SHR-DM and prevented by treatment with bosentan+amlodipine and cilazapril. Similarly, these two kinds of therapies in SHR-DM abolished the overexpression of renal TGF-beta1 by Western blot analysis and reduced the accumulation of collagen type IV, laminin and fibronectin proteins by an immunochemical approach. Amlodipine monotherapy had no detectable effects on the above parameters. CONCLUSION: Bosentan combined with amlodipine can offer similar renoprotective effects on that of cilazapril and may be a potent therapy to attenuate renal injury by reducing renal protein levels of TGF-beta1 in diabetes with a hypertensive state. 展开更多
关键词 AMLODIPINE Angiotensin II Animals calcium channel blockers Collagen Type IV Diabetic Nephropathies Drug Therapy Combination Hypertension Kidney Male RATS Rats Inbred SHR Rats Inbred WKY Receptors Endothelin Research Support Non-U.S. Gov't SULFONAMIDES Transforming Growth Factor beta
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Renoprotective Effect of the Combination of Renin-angiotensin System Inhibitor and Calcium Channel Blocker in Patients with Hypertension and Chronic Kidney Disease 被引量:7
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作者 Rong-Shuang Huang Yi-Ming Cheng +2 位作者 Xiao-Xi Zeng Sehee Kim Ping Fu 《Chinese Medical Journal》 SCIE CAS CSCD 2016年第5期562-569,共8页
Background:Renin-angiotensin system inhibitor and calcium channel blocker (CCB) are widely used in controlling blood pressure (BP) in patients with chronic kidney disease (CKD).We carried out a meta-analysis to... Background:Renin-angiotensin system inhibitor and calcium channel blocker (CCB) are widely used in controlling blood pressure (BP) in patients with chronic kidney disease (CKD).We carried out a meta-analysis to compare the renoprotective effect of the combination of angiotensin-converting enzyme inhibitor (ACEI) or angiotensin receptor blocker (ARB) and CCB (i.e.,ACEI/ARB + CCB) with ACEI/ ARB monotherapy in patients with hypertension and CKD.Methods:Publications were identified from PubMed,Embase,Medline,and Cochrane databases.Only randomized controlled trials (RCTs) of BP lowering treatment for patients with hypertension and CKD were considered.The outcomes of end-stage renal disease (ESRD),cardiovascular events,BP,urinary protein measures,estimated glomerular filtration rate (GFR),and adverse events were extracted.Results:Based on seven RCTs with 628 patients,ACEI/ARB + CCB did not show additional benefit for the incidence of ESRD (risk ratio [RR] =0.84;95% confidence interval [CI]:0.52-1.33) and cardiovascular events (RR =0.58;95% CI:0.21-1.63) significantly,compared with ACEI/ARB monotherapy.There were no significant differences in change from baseline to the end points in diastolic BP (weighted mean difference [WMD] =-1.28 mmHg;95% CI:-3.18 to-0.62),proteinuria (standard mean difference =-0.55;95% CI:-1.41 to-0.30),GFR (WMD =-0.32 ml/min;95% CI:-1.53 to-0.89),and occurrence of adverse events (RR =1.05;95% CI:0.72-1.53).However,ACEI/ARB + CCB showed a greater reduction in systolic BP (WMD =-4.46 mmHg;95% CI:-6.95 to-1.97),compared with ACEI/ARB monotherapy.Conclusion:ACEI/ARB + CCB had no additional renoprotective benefit beyond than what could be achieved with ACEI/ARB monotherapy. 展开更多
关键词 calcium channel blocker Chronic Kidney Disease HYPERTENSION Renin-angiotensin System Inhibitor RENOPROTECTION THERAPY
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ORIGINAL ARTICLES CALCIUM CHANNEL BLOCKERS IN CIRRHOTIC PATIENTS WITH PORTAL HYPERTENSION 被引量:4
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作者 李定国 陆汉明 +3 位作者 李宣海 权启镇 李新民 陆玮 《Chinese Medical Journal》 SCIE CAS CSCD 1995年第11期5-10,共6页
Four calcium channel blockers, i.e. nifedipine, verapamil, cinnarizine and tetrandrine are currently available and used widely in treating cardiovascular diseases. To confirm the effects, if any, of calcium channel bl... Four calcium channel blockers, i.e. nifedipine, verapamil, cinnarizine and tetrandrine are currently available and used widely in treating cardiovascular diseases. To confirm the effects, if any, of calcium channel blockers on cirrhotic patients with portal hypertension, a study was performed on esophageal variceal pressure and rebleeding rate of esophageal varices after 2 years by using calcium channel blocker in 321 patients from some 23 hospitals. The results demonstrated that the calcium channel blockers could significantly reduce the esophageal variceal pressure and the portal blood flow in cirrhotic patients with portal hypertension. The proportion of patients with no recurrent gastrointestinal bleeding after 2 years medication of tetrandrine was 87.9% in tetrandrine group, significantly higher than those in the other 4 groups (P<0.05). It is suggested that tetrandrine should be more effective for cirrhotic patients with portal hypertension in preventing recurrent variceal bleeding. 展开更多
关键词 CCB ORIGINAL ARTICLES calcium channel blockerS IN CIRRHOTIC PATIENTS WITH PORTAL HYPERTENSION NIF SPV In IV THAN
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Adjuvant role of a T-type calcium channel blocker, TTA-A2, in lung cancer treatment with paclitaxel 被引量:1
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作者 Neema Kumari Pravin Shankar Giri Subha Narayan Rath 《Cancer Drug Resistance》 2021年第4期996-1007,共12页
Aim:Chemoresistance is a prevalent issue in cancer treatment.Paclitaxel(PTX)is a microtubule-binding anticancer drug used in various cancer treatments.However,cancer cells often show chemoresistance against PTX with t... Aim:Chemoresistance is a prevalent issue in cancer treatment.Paclitaxel(PTX)is a microtubule-binding anticancer drug used in various cancer treatments.However,cancer cells often show chemoresistance against PTX with the help of P-glycoprotein(Pgp)-a drug efflux pump.It has also been observed that overexpressed T-type calcium channels(TTCCs)maintain calcium homeostasis in cancer cells,and calcium has a role in chemoresistance.Therefore,the aim of this study was to test the adjuvant role of TTA-A2,a TTCC blocker,in enhancing the anticancer effect of PTX on the A549 lung adenocarcinoma cell line.Methods:Morphology assay,calcium imaging assay,clonogenic assay,apoptosis assay,and real-time polymerase chain reaction(real-time PCR)were performed to find the adjuvant role of TTA-A2.Samples were treated with PTX at 10 nM concentration and TTA-A2 at 50 and 100 nM concentrations.PTX and TTA-A2 were used in the combination treatment at 10 and 100 nM concentrations,respectively.Results:Immunocytochemistry confirmed the expression of TTCC in A549 cells.Morphology assay showed altered morphology of A549 cells.The adjuvant role of TTA-A2 was observed in the calcium imaging assay in spheroids,in the clonogenic assay in monolayers,and in the apoptosis assay in both cultures.With real-time PCR,it was observed that,even though cells express the mRNA of Pgp,it is non-significant upon treatment with PTX and TTA-A2.Conclusion:TTA-A2 can be used as an adjuvant to reduce chemoresistance in cancer cells as well as to enhance the anticancer effect of the standard anticancer drug PTX.Being a potent TTCC inhibitor,TTA-A2 may also enhance the anticancer effects of other anticancer drugs. 展开更多
关键词 TTA-A2 PACLITAXEL ADJUVANT lung adenocarcinoma T-type calcium channel blocker
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Effect of Calcium Ionophore and Calcium Channel Blockers on Immediate Hypersensitivity Reactions
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作者 黄钦田 陈丙莺 孙爱民 《The Journal of Biomedical Research》 CAS 1994年第1期26-28,共3页
The release of mediators from mast cells is a model for cell secretion and is an in-vitro index for immediate hypersensitivity reactions. Calcium influx is generally accepted to be the primary biochemicalevent in mast... The release of mediators from mast cells is a model for cell secretion and is an in-vitro index for immediate hypersensitivity reactions. Calcium influx is generally accepted to be the primary biochemicalevent in mast cell activation.We studied the effect of the calcium ionophore A 23187 and calcium channelblockers,nifedipine and verapamil, in triggering the activation of rat peritoneal mast cells.At suitableconcentration nifedipine and verapamil have had the inhibition effect in the IgE-dependent roaction. 展开更多
关键词 calcium ionophore A23187 calcium channel blocker NIFEDIPINE VERAPAMIL mediator Histamine
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Calcium channel blockers improve prognosis of patients with coronavirus disease 2019 and hypertension
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作者 Chi Peng Hao Wang +5 位作者 Yu-Feng Guo Ge-Yao Qi Chen-Xu Zhang Ting Chen Jia He Zhi-Chao Jin 《Chinese Medical Journal》 SCIE CAS CSCD 2021年第13期1602-1609,共8页
Background:Hypertension is considered an important risk factor for the coronavirus disease 2019(COVID-19).The commonly anti-hypertensive drugs are the renin-angiotensin-aldosterone system(RAAS)inhibitors,calcium chann... Background:Hypertension is considered an important risk factor for the coronavirus disease 2019(COVID-19).The commonly anti-hypertensive drugs are the renin-angiotensin-aldosterone system(RAAS)inhibitors,calcium channel blockers(CCBs),and beta-blockers.The association between commonly used anti-hypertensive medications and the clinical outcome of COVID-19 patients with hypertension has not been well studied.Methods:We conducted a retrospective cohort study that included all patients admitted with COVID-19 to Huo Shen Shan Hospital and Guanggu District of the Maternal and Child Health Hospital of Hubei Province,Wuhan,China.Clinical and laboratory characteristics were extracted from electronic medical records.Hypertension and anti-hypertensive treatment were confirmed by medical history and clinical records.The primary clinical endpoint was all-cause mortality.Secondary endpoints included the rates of patients in common wards transferred to the intensive care unit and hospital stay duration.Logistic regression was used to explore the risk factors associated with mortality and prognosis.Propensity score matching was used to balance the confounders between different anti-hypertensive treatments.Kaplan-Meier curves were used to compare the cumulative recovery rate.Log-rank tests were performed to test for differences in Kaplan-Meier curves between different groups.Results:Among 4569 hospitalized patients with COVID-19,31.7%(1449/4569)had a history of hypertension.There were significant differences in mortality rates between hypertensive patients with CCBs(7/359)and those without(21/359)(1.95%vs.5.85%,risk ratio[RR]:0.32,95% confidence interval[CI]:0.13–0.76,χ^(2)=7.61,P=0.0058).After matching for confounders,the mortality rates were similar between the RAAS inhibitor(4/236)and non-RAAS inhibitor(9/236)cohorts(1.69% vs.3.81%,RR:0.43,95% CI:0.13–1.43,χ^(2)=1.98,P=0.1596).Hypertensive patients with beta-blockers(13/340)showed no statistical difference in mortality compared with those without(11/340)(3.82% vs.3.24%,RR:1.19,95% CI:0.53–2.69,χ^(2)=0.17,P=0.6777).Conclusions:In our study,we did not find any positive or negative effects of RAAS inhibitors or beta-blockers in COVID-19 patients with hypertension,while CCBs could improve prognosis. 展开更多
关键词 calcium channel blockers COVID-19 HYPERTENSION Renin-angiotensin-aldosterone system inhibitors Anti-hypertensive medication MORTALITY
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Applying Theoretical Approach for Predicting the Selective Calcium Channel Blockers Pharmacological Parameter by Biopartitioning Micellar Chromatography
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作者 王素敏 杨更亮 +2 位作者 李志伟 刘海燕 郭慧娟 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2006年第6期755-760,共6页
The usefulness of biopartitioning micellar chromatography (BMC) for predicting oral drug acute toxicity and apparent bioavailability was demonstrated. A logarithmic model (an LD50 model) and the second order polyn... The usefulness of biopartitioning micellar chromatography (BMC) for predicting oral drug acute toxicity and apparent bioavailability was demonstrated. A logarithmic model (an LD50 model) and the second order polynomial models (apparent bioavailability model) have been obtained using the retention data of the selective calcium channel blockers to predict pharmacological properties of compounds. The use of BMC is simple, reproducible and can provide key information about the acute toxicity and transport properties of new compounds during the drug discovery process. 展开更多
关键词 biopartitioning micellar chromatography pharmacological parameter selective calcium channel blockers
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Inhibition of calcium channel blocker associated with lowering C-reactive protein level in rupture of abdominal aortic aneurysm
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作者 王建国 李世军 杨庭树 《South China Journal of Cardiology》 CAS 2010年第4期228-233,256,共7页
Background As to abdominal aortic aneurysm (AAA) disease, our major challenge faced in clinical practice is effective drug therapies to prevent rupture of AAA. At present, there wasn’t definite evidence that other ... Background As to abdominal aortic aneurysm (AAA) disease, our major challenge faced in clinical practice is effective drug therapies to prevent rupture of AAA. At present, there wasn’t definite evidence that other drugs had a role in inhibiting AAA rupture except for beta blocker. In our study, we evaluated the role of calcium channel blocker (CCB) played in prevention of AAA rupture. Methods A total of 460 subjects with AAA, aged 29 to 89 years, at least twice admitted into our hospital from January 2000 to April 2010. All of them accepted ultrasound examination for scanning abdominal aortic aneurysm at each admission period. Results Our results revealed that AAA patients suffered from rupture took little CCB and beta-blockers. Treatment with CCB or beta blocker was negatively related to risk of rupture of abdominal aortic aneurysm, and drugs such as statins, angiotensin II receptor blocker (ARB) or angiotensin-converting enzyme inhibitor (ACEI) hadn’t positive or negative effect on AAA. C reactive protein level was lower in patients with taking CCB than those without CCB. Conclusions CCB therapy was negatively related to AAA rupture, and possibly was another kind of drug for. 展开更多
关键词 abdominal aortic aneurysm RUPTURE calcium channel blocker
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Argemone mexicana extract alleviates gastrointestinal disorders by stimulating muscarinic receptors and blocking voltage-gated L-type calcium channels
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作者 Rabia Iqbal Irfan Hamid +7 位作者 Khalid Hussain Janbaz Muhammad Furqan Akhtar Ammara Saleem Ali Sharif Sohaib Peerzada Bushra Akhtar Kashif Sohail Sajid Ali 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2021年第5期214-221,共8页
Objective:To investigate the pharmacological potential of Argemone mexicana in treating constipation and emesis by using in vitro and in vivo models.Methods:The spasmogenic and spasmolytic effects were evaluated on is... Objective:To investigate the pharmacological potential of Argemone mexicana in treating constipation and emesis by using in vitro and in vivo models.Methods:The spasmogenic and spasmolytic effects were evaluated on isolated rabbit jejunum fragments loaded in a tissue organ bath.The response was recorded with an isotonic transducer attached with Power Lab Data Acquisition System.The laxative and antiemetic activities were assessed in BALB-c mice and poultry chicks challenged with carbamylcholine and copper sulphate stimulated emesis,respectively.Results:The total phenolic and total flavonoids contents of the extract were(267.75±5.77)mg GAE/g and(73.86±6.01)mg QE/g,respectively.Argemone mexicana extract exerted spasmogenic effect on isolated rabbit jejunum segments with an EC_(50)value of 0.016 mg/m L,which was blocked by atropine(0.3μM).Argemone mexicana extract exerted spasmolytic effect in atropine treated jejunum fragments with an EC_(50)value of 2.185 mg/mL.Furthermore,Argemone mexicana extract relaxed potassium(80 mM)-induced contractions(EC_(50):9.07 mg/mL),similar to a standard drug verapamil.The calcium channel blocker activity was confirmed by a rightward shift of concentration-response curve of calcium in the presence of Argemone mexicana extract(1-5 mg/mL)and verapamil(0.1-1μM).In addition,the extract increased the distance travelled by a charcoal in the gastrointestinal tract and exhibited antiemetic effect on copper sulphate induced emesis in chicks.Conclusions:Argemone mexicana shows cholinergic agonist and calcium channel blocker activities,as well as antiemetic effect.It may be used as a potential agent for treating gastrointestinal disorders. 展开更多
关键词 Argemone mexicana Muscarinic agonist calcium channel blocker CONSTIPATION EMESIS
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Effects of Tetrandrine on Cytosolic Free Calcium in Cultured Bovine Aortic Smooth Muscle Cells 被引量:1
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作者 李新天 王幼林 《Journal of Chinese Pharmaceutical Sciences》 CAS 1998年第2期38-41,共4页
\ The effects of tetrandrine (Tet) on cytosolic free calcium ([Ca2+]i) in subcultured bovine aortic smooth muscle cells (SMC) were studied by Fura2 and ARCMMIC cation measurement system. Tet (1~100 μmol·L-1) ... \ The effects of tetrandrine (Tet) on cytosolic free calcium ([Ca2+]i) in subcultured bovine aortic smooth muscle cells (SMC) were studied by Fura2 and ARCMMIC cation measurement system. Tet (1~100 μmol·L-1) had no effect on the resting [Ca2+]i, but had inhibitory effects on [Ca2+]i elevation induced by high K+, 5HT, ATP, Ang II and NE in the presence of extracellular Ca2+. High concentration of Tet also inhibited Pheinduced [Ca2+]i elevation in absence of extracellular Ca2+. Tet (1~100 μmol·L-1) inhibited KCl (60 mmol·L-1) induced [Ca2+]i elevation in dosedependent manner, the IC50 value was 9.2 (95% confidence limits: 5.7~14.9) mmol·L-1. The results suggested that Tet had blocking effects on both VOC and ROC in bovine aortic SMC. It appears that the mechanisms of blocking effect of Tet on ROC might be primarily due to its Ca2+ entry blocking effects. 展开更多
关键词 TETRANDRINE Vascular smooth muscle cell Fura2 calcium channel blockers
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硝苯地平控释片联合盐酸贝那普利片治疗老年高血压临床效果的研究进展
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作者 毕美玲 杨彦立 《临床误诊误治》 CAS 2024年第19期90-93,共4页
随着社会与生活环境的不断改变,老年高血压的发病率也逐年攀升。硝苯地平控释片联合盐酸贝那普利片在老年高血压治疗方面受到普遍的关注以及重视,二者分别属于钙离子通道阻滞剂和血管紧张素转化酶抑制剂,发挥降压效果的机制也各不相同... 随着社会与生活环境的不断改变,老年高血压的发病率也逐年攀升。硝苯地平控释片联合盐酸贝那普利片在老年高血压治疗方面受到普遍的关注以及重视,二者分别属于钙离子通道阻滞剂和血管紧张素转化酶抑制剂,发挥降压效果的机制也各不相同。对老年高血压患者联合应用上述两种药物进行治疗,可以发挥互相协同的降压效果,使患者的血压控制率得到明显提升,同时还能够有效地降低单一药物应用所导致的不良反应。本文综述近年在老年高血压患者的临床治疗过程中,联合应用硝苯地平控释片以及盐酸贝那普利片临床效果的研究进展。 展开更多
关键词 高血压 老年 钙离子通道阻滞剂 硝苯地平 血管紧张素转化酶抑制剂 贝那普利 降压 综述
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Calcium Signaling is Involved in Negative Phototropism of Rice Seminal Roots 被引量:5
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作者 CHEN Juan MO Yi-wei XU Hua-wei 《Rice science》 SCIE 2014年第1期39-46,共8页
Calcium ions (Ca2+) act as an intracellular second messenger and affect nearly all aspects of cellular life. They are functioned by interacting with polar auxin transport, and the negative phototropism of plant roo... Calcium ions (Ca2+) act as an intracellular second messenger and affect nearly all aspects of cellular life. They are functioned by interacting with polar auxin transport, and the negative phototropism of plant roots is caused by the transport of auxin from the irradiated side to the shaded side of the roots. To clarify the role of calcium signaling in the modulation of rice root negative phototropism, as well as the relationship between polar auxin transport and calcium signaling, calcium signaling reagents were used to treat rice seminal roots which were cultivated in hydroculture and unilaterally illuminated at an intensity of 100-200 pmol/(m2.s) for 24 h. Negative phototropism curvature and growth rate of rice roots were both promoted by exogenous CaCI2 lower than 100 pmol/L, but inhibited by calcium channel blockers (verapamil and LaCI3), calcineurin inhibitor (chlorpromazine, CPZ), and polar auxin transport inhibitor (N-l-naphthylphthalamic acid, NPA). Roots stopped growing and negative phototropism disappeared when the concentrations increased to 100 pmol/L verapamil, 12.500 ~Jmol/L LaCI3, 60 pmol/L CPZ, and 6 pmol/L NPA. Moreover, 100 pmol/L CaCI2 could relieve the inhibition of LaCI3, verapamil and NPA. The enhanced negative phototropism curvature was caused by the transportation of more auxin from the irradiated side to the shaded side in the presence of exogenous Ca2+. Calcium signaling plays a key role as a second messenger in the process of light signal regulation of rice root growth and negative phototropism. 展开更多
关键词 calcium signaling polar auxin transport calcium channel blocker second messenger negative phototropism
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钙通道阻滞剂1,4-二氢吡啶类药物的绿色合成
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作者 谢建武 刘俊男 谢玄升 《陕西科技大学学报》 北大核心 2024年第1期65-72,共8页
心脏及心脑血管疾病是发达国家人群的第一死因,也是中国人死亡的首位原因.L-型钙通道是目前临床上主要使用选择性钙通道阻滞剂1,4-二氢吡啶类药物.文章研究了在非均相催化剂离子交换树脂Amberlyst 15的催化以及无溶剂条件下,高效的合成... 心脏及心脑血管疾病是发达国家人群的第一死因,也是中国人死亡的首位原因.L-型钙通道是目前临床上主要使用选择性钙通道阻滞剂1,4-二氢吡啶类药物.文章研究了在非均相催化剂离子交换树脂Amberlyst 15的催化以及无溶剂条件下,高效的合成了钙通道阻滞剂1,4-二氢吡啶类药物.该反应体系具有原料便宜、反应时间短、操作及后处理简单、催化剂可回收利用、反应可放大等优良特点. 展开更多
关键词 药物合成 钙通道阻滞剂 1 4-二氢吡啶 绿色合成 非均相催化
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钙通道阻滞剂对未破裂颅内动脉瘤影响的研究进展
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作者 万子豪 李爱民 《中国医药》 2024年第7期1091-1095,共5页
未破裂的颅内动脉瘤是一颗埋在患者体内的定时炸弹,这类患者往往伴有高血压病。除去多数研究已证实的促破裂危险因素以外,复杂的血流动力学、炎症因素以及未控制的高血压也增加了其破裂风险。作为临床常用的抗高血压药物,钙通道阻滞剂... 未破裂的颅内动脉瘤是一颗埋在患者体内的定时炸弹,这类患者往往伴有高血压病。除去多数研究已证实的促破裂危险因素以外,复杂的血流动力学、炎症因素以及未控制的高血压也增加了其破裂风险。作为临床常用的抗高血压药物,钙通道阻滞剂被发现在促破裂进程中可以发挥保护作用,但也有研究发现了不同甚至矛盾的结果。本文就动脉瘤破裂的危险因素、钙通道阻滞剂使用对瘤体破裂的影响以及发挥的双重效应作一综述。 展开更多
关键词 未破裂颅内动脉瘤 钙通道阻滞剂 血流动力学 慢性炎症 高血压
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钙离子通道阻滞剂在慢性疼痛患者中临床应用的研究进展
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作者 王翼华 王前 +1 位作者 张立贇 梁元 《系统医学》 2024年第4期191-194,共4页
现代医学将疼痛列为继呼吸、脉搏、血压、体温后的第五生命体征,足见其在人体健康中的重要性。慢性疼痛是指超过正常愈合时间(一般指3个月)持续存在的自觉疼痛感,相对于急性疼痛而言,慢性疼痛一般会涉及生理或神经系统,并可能会影响身... 现代医学将疼痛列为继呼吸、脉搏、血压、体温后的第五生命体征,足见其在人体健康中的重要性。慢性疼痛是指超过正常愈合时间(一般指3个月)持续存在的自觉疼痛感,相对于急性疼痛而言,慢性疼痛一般会涉及生理或神经系统,并可能会影响身体的多个方面。由于受到发病机制复杂、个体差异大以及神经可塑性等因素的影响,慢性疼痛的治疗难度相对较大。药物治疗是慢性疼痛管理中的常用手段,关于药物的选择或配伍也一直是临床研究的热点。本文综述了钙离子通道阻滞剂在慢性疼痛中的应用,旨在为疾病的治疗提供参考。 展开更多
关键词 慢性疼痛 钙离子通道阻滞剂 研究进展
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Effects of 2-APB on Store-operated Ca^(2+) Channel Currents of Hepatocytes after Hepatic Ischemia/Reperfusion Injury in Rats
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作者 黄昌州 张宗明 裘法祖 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2005年第1期39-41,共3页
The effects of hepatic ischemia/reperfusion (I/R) injuries on hepatocellular viability and store-operated calcium current (Isoc) in isolated rat hepatocytes and the effects of 2-APB on store-operated calcium current (... The effects of hepatic ischemia/reperfusion (I/R) injuries on hepatocellular viability and store-operated calcium current (Isoc) in isolated rat hepatocytes and the effects of 2-APB on store-operated calcium current (Isoc) in isolated rat hepatocytes after hepatic ischemia/reperfusion injuries were studied. Hepatic ischemia and reperfusion injury model was established and whole cell patch-clamp techniques were used to investigate the effects of 2-APB on Isoc. The results showed that ischemia/reperfusion injuries could significantly reduce hepatocellular viability and further increase Isoc in hepatocytes and 2-APB (20, 40, 60, 80, 100 μmol/L) produced a concentration-dependent decrease of Isoc with IC 50 value of 64.63±10.56 μmol/L (n=8). It was concluded that ischemia/reperfusion injuries could reduce hepatocellular viability, probably through increased Isoc in hepatocytes and 2-APB had a protective effect on ischemia/reperfusion-induced liver injury, probably though inhibiting Isoc. 展开更多
关键词 hepatic ischemia/reperfusion injuries HEPATOCYTES store-operated calcium current store-operated calcium channel calcium channel blockers
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