scholarly journals Effect of calcium channel blockers long-term use on blood level of luteinizing hormone and estradiol in rats

2014 ◽  
Vol 95 (3) ◽  
pp. 389-392
Author(s):  
A U Kazimova ◽  
K G Garaeva
Keyword(s):  
Luteinizing Hormone ◽  
Calcium Channel ◽  
Blood Level ◽  
Calcium Channel Blockers ◽  
Female Rats ◽  
Control Group ◽  
Blood Levels ◽  
Channel Blockers ◽  
High Doses

Aim. To define the effect of calcium channel blockers long-term use on blood level of luteinizing hormone and estradiol in female rats. Methods. 82 mature female outbreed rats were distributed to seven groups. The rats of the first (control) group were administered 0.2 ml of 0.9% saline intraperitoneally for 21 day. Instead of saline, 5 and 25 mg/kg of verapamil were used in rats of the second and third groups, 5 and 10 mg/kg of nifedipine - in rats of the 4th and 5th groups, 5 and 20 mg/kg of diltiazem - in rats of the 6th and 7th groups accordingly. Blood levels of luteinizing hormone and estradiol were determined by ELISA after animals were withdrawn from the study. Results. In rats treated with calcium channel blockers, a dose-dependent decrease of luteinizing hormone and estradiol blood levels were observed. High doses of verapamil (group 3) decreased the level of luteinizing hormones and estradiol by 50% compared to control group, high doses of diltiazem (group 7) - by 50%. Only minor changes were observed in rats who were administered nifedipine, even in high doses. Conclusion. Observed decrease of blood estradiol level indicate the influence of calcium channel blockers directly on ovarian function; decrease of blood luteinizing hormone level might by secondary due to positive feedback between the estradiol and luteinizing hormone secretion and reflect decreased estradiol blood level.

scholarly journals Impact of Calcium Channel Blockers on Aspirin Reactivity in Patients With Coronary Artery Disease

2021 ◽  
Author(s):  
Afek Kodesh ◽  
Eli Lev ◽  
Dorit Leshem-Lev ◽  
Alejandro Solodky ◽  
Ran Kornowski ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Calcium Channel ◽  
Calcium Channel Blockers ◽  
Platelet Reactivity ◽  
Aspirin Resistance ◽  
Control Group ◽  
Channel Blockers ◽  
Artery Disease ◽  
Stable Cad

Abstract Purpose: Calcium channel blockers (CCBs) do not reduce the risk of initial or recurrent myocardial infarction (MI) in patients diagnosed with stable coronary artery disease (CAD). The aim of this current study was to evaluate the association between CCBs and aspirin resistance in patients with CAD. Methods: Patients with stable CAD who were regularly taking aspirin (75-100 mg qd) for at least one month prior to enrollment in the study were included. The VerifyNow system was used for platelet function testing with high on-aspirin platelet reactivity (HAPR) defined as aspirin reaction units (ARU) >550. We compared patients treated with CCBs versus control group. Results: 503 patients with CAD were included in this study, 88 were treated with CCBs; Mean age (67.9±9.7 in the CCB group vs 66.5±11.4 in the control group, p=0.288), gender (77.3 male vs. 82.9%, p=0.214) and rates of diabetes mellitus (34.7 vs. 36.9%, p=.121) were similar. Rates of hypertension were higher in the CCB group (83.9 vs. 63.5%, p<0.01), but rates of past MI were lower (47.1 vs. 59.7%, p=0.039). The mean ARU was 465.4P70.0 for patients treated with CCBs versus 445.2u60.0 in controls (p=0.006). Similarly, 15.9% of CCB patients demonstrated HAPR compared to 7.0% (p=0.006). In a multivariate analysis, the administration of CCBs was independently associated with HAPR (OR- 1.72, 95% CI 1.04 – 8.91, p=0.047). Conclusions: Usage of CCBs is positively correlated with aspirin resistance. These findings may suggest an adverse pharmacologic effect of CCBs among patients with stable CAD treated with aspirin.

scholarly journals Effects of calcium antagonists on brain ischemia

2011 ◽  
Vol 64 (5-6) ◽  
pp. 257-261
Author(s):  
Nada Naumovic ◽  
Petar Slankamenac ◽  
Danka Filipovic ◽  
Vesna Ivetic ◽  
Snezana Tomasevic-Todorovic ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Calcium Channel ◽  
Calcium Channel Blockers ◽  
Calcium Antagonists ◽  
Barthel Index ◽  
Brain Perfusion ◽  
Functional Independence ◽  
Channel Blockers ◽  
Therapeutic Treatment

Introduction. Stroke is the second leading cause of death in the world and the leading cause of serious, long term disability in adults; about half of those who survive become dependent on others in performing personal activities of daily living. Ischemia disturbs calcium cellular homeostasis, whereas calcium channel blockers re-establish it. This study was aimed at assessing benefits of calcium channel blockers on the outcome of rehabilitation of the patients afflicted by ischemic stroke. Material and Methods. The functional independence was measured by the Barthel index in 90 patients subjected to rehabilitative therapeutic treatment. The functional recovery of patients treated with calcium channel blockers and with other drugs (control) was compared and tested. Results. The analysis of variance (ANOVA) for the 0.5 confidence interval showed that the increases of the Barthel index values were significantly higher in the patients treated with calcium antagonists (p<0.5). Discussion. According to the literature, such an outcome is the result of improved brain blood f low auto-regulation, increased brain perfusion as well as of neuroprotective, antioxidative, platelet antiaggregatory effects of investigated drugs. Conclusion. The calcium channel blockers improved the outcome of rehabilitative therapeutic treatment significantly in the patients afflicted by ischemic stroke.

scholarly journals Impact of antihypertensive therapy on the functional state of the pituitary-gonadal system in patients with arterial hypertension

2005 ◽  
Vol 11 (1) ◽  
pp. 34-38 ◽  
Author(s):  
N. V. Ivanov
Keyword(s):  
Arterial Hypertension ◽  
Calcium Channel ◽  
Antihypertensive Therapy ◽  
Calcium Channel Blockers ◽  
Ace Inhibitors ◽  
Antihypertensive Agents ◽  
Free Testosterone ◽  
Blood Levels ◽  
Channel Blockers ◽  
The Impact

The aim of the study was to evaluate the impact of antihypertensive therapy with slow calcium-channel blockers, angiotensin-converting enzyme (ACE) inhibitors, and ß-adrenergic receptor blockers on the metabolism and blood levels of major adrenal androgens and gonads, as well as the insulin resistance in males with arterial hypertension (AH) Ninety-one patients with AH and 15 age-matched healthy male controls were examined The hypertensive males treated with slow calcium-channel blockers or ACE inhibitors were found to have a lower level of insulin and higher levels of dehydroepiandrosterone sulfate and free testosterone on the 30th day of treatment Those on blockers were observed to have a higher level of insulin and lower levels of major adrenal and testicular androgens as compared with their baseline levels Therapy did not alter the levels of gonadotropic hormones, estradiol, and cortisol and they did not differ in the compared groups The family history of AH has a modulating effect on a hormonal response in males with AH treated with antihypertensive agents

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