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β-receptor blockers significantly impact the cardiovascular system by counteracting catecholamine-induced sympathetic responses. These medications decrease heart rate, contractility, and cardiac output, potentially leading to cardiac depression, life-threatening bradycardia, and death. Therapeutically, β-blockers function as mild antihypertensives and are utilized in treating angina pectoris and cardiac arrhythmias. However, nonselective β-blockers inhibit β2-receptors in...
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β-adrenergic antagonists, or β-blockers, modulate the sympathetic nervous system by targeting β-adrenoceptors and inhibiting catecholamine-mediated sympathetic responses. β-blockers differ in their adrenoceptor subtype affinity, lipophilicity, and α-blocking capabilities. The history of β-blocker development began with the prototype, dichloroisoprenaline, which exhibited partial agonist activity. As a result, propranolol was developed as a pure antagonist but...
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Third-generation β-blockers, such as labetalol and carvedilol, represent a significant advancement in managing cardiovascular conditions. Unlike conventional β-blockers, which can induce peripheral vasoconstriction, third-generation drugs block α1 adrenoceptors. This promotes vasodilation through several mechanisms, such as increased nitric oxide production, inhibition of calcium ion entry, opening of potassium ion channels, and antioxidant action. Labetalol, for instance, is...
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Heart Failure Drugs: β-Blockers01:22

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β-adrenergic antagonists, commonly known as β-blockers, block the effects of sympathetic neurotransmitters such as noradrenaline (NA) and adrenaline (ADR). They have several beneficial effects in heart failure treatment. They reduce heart rate, the force of contraction, and cardiac muscle relaxation. They also slow the atrial-ventricular conduction rate and raise the threshold for arrhythmias. The concentration of β-blockers determines their effects on bronchodilation,...
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Antihypertensive Drugs: Types of β-Blockers01:28

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β receptors are classified into three subclasses: β1, β2, and β3. β1 receptors are primarily located in the heart and kidneys. When they get activated, they increase heart rate, contractility, and renin release. This process enhances blood pressure and aids in stress management. In contrast, β2 receptors are situated mainly in the lungs, blood vessels, and skeletal muscles. Upon activation, they trigger smooth muscle relaxation, causing bronchodilation and...
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Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

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Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
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Are beta blockers new potential anticancer agents?

Shahid Akbar1, Mansour Saleh Alsharidah

  • 1Department of Pharmacology, College of Pharmacy, Qassim University, Buraidah, Saudi Arabia

Asian Pacific Journal of Cancer Prevention : APJCP
|December 19, 2014
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Summary
This summary is machine-generated.

Beta-blockers show potential as anti-cancer drugs, with studies suggesting protective effects against lung, melanoma, breast, pancreatic, and prostate cancers. Further research is ongoing to confirm these promising findings.

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Area of Science:

  • Pharmacology
  • Oncology
  • Cardiology

Background:

  • Beta-blockers are widely used cardiovascular drugs with a long history.
  • Emerging research suggests a potential role for beta-blockers in cancer prevention and treatment.
  • Existing studies present mixed findings, necessitating further investigation.

Purpose of the Study:

  • To review current evidence on the anti-cancer effects of beta-blockers.
  • To summarize findings from retrospective case-control studies.
  • To present experimental and clinical observations regarding beta-blocker use in oncology.

Main Methods:

  • Review of retrospective case-control studies.
  • Analysis of experimental findings.
  • Compilation of clinical observations.

Main Results:

  • Case-control studies suggest a preventive effect of beta-blockers against non-small cell lung carcinoma, melanoma, breast, pancreatic, and prostate cancers.
  • Experimental and clinical data are currently inconclusive with some inconsistencies.
  • Indications suggest a positive role for specific beta-blockers in certain cancer types.

Conclusions:

  • Beta-blockers represent a potential new avenue for cancer therapy.
  • Further research is required to elucidate the precise mechanisms and efficacy.
  • The findings highlight the need for continued investigation into beta-blockers' oncological applications.