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Related Concept Videos

Preclinical Development: Overview01:28

Preclinical Development: Overview

Preclinical development consists of a series of tests that ensure the safety and efficacy of a new therapeutic compound before it is tested in humans. There are four main phases to this process. First, safety pharmacology tests are conducted to ensure the drug does not produce any acutely harmful effects. These tests examine parameters such as bronchoconstriction, cardiac dysrhythmias, blood pressure changes, and ataxia. Next, preliminary toxicological testing is performed to determine the...
Clinical Trials: Overview01:11

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Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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Classical Conditioning in Daily Life01:17

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Classical conditioning, a fundamental principle of associative learning, explains various phenomena observed in daily life, such as fear development, the placebo effect, taste aversion, and drug habituation. These applications demonstrate the profound impact of associative learning on human behavior and physiological responses.
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
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The empirical approach to drug therapy optimization relies on correlating pharmacological response with administered dosage. Such an approach can be costly, time-consuming, and often yields poor correlation due to variables like formulation factors and drug elimination characteristics. A more precise approach correlates response with plasma drug concentration or the amount of drug in the body, rather than dosage. This is achieved through pharmacokinetic-pharmacodynamic (PK/PD) modeling, which...
Clinical Trials01:16

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Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...

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Conditioned pharmacotherapeutic effects: a preliminary study.

Robert Ader1, Mary Gail Mercurio, James Walton

  • 1Department of Psychiatry, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA. Robert_Ader@urmc.rochester.edu

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Partial reinforcement with corticosteroids may effectively treat psoriasis, reducing symptoms and relapse. This approach uses less medication than standard therapy, suggesting conditioning plays a role in treatment efficacy.

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Area of Science:

  • Dermatology
  • Behavioral Science
  • Pharmacology

Background:

  • Psoriasis is a chronic skin condition often managed with corticosteroids.
  • The role of behavioral conditioning in pharmacotherapy has not been extensively studied.
  • Standard corticosteroid treatment protocols may not be optimized for long-term efficacy and patient outcomes.

Purpose of the Study:

  • To investigate if a partial reinforcement schedule of corticosteroid treatment reduces psoriasis severity and relapse rates compared to standard continuous reinforcement.
  • To explore the potential influence of behavioral conditioning on psoriasis pharmacotherapy.

Main Methods:

  • A double-blind, randomized trial involving 46 psoriasis patients.
  • Three groups were established: Standard Therapy (continuous reinforcement, full dose), Partial Reinforcement (25-50% of the time, full dose), and Dose Control (continuous reinforcement, 25-50% of the initial dose).
  • Lesion severity and relapse rates were monitored.

Main Results:

  • In New York, partial reinforcement significantly reduced lesion severity compared to dose control and was comparable to standard therapy.
  • Across the entire population, partial reinforcement showed a lower relapse frequency (26.7%) than dose control (61.5%), and was similar to standard therapy (22.2%).
  • Results in California did not definitively support or refute the hypothesis.

Conclusions:

  • Partial reinforcement schedules with corticosteroids may be effective in managing psoriasis, potentially requiring lower cumulative drug doses.
  • These findings suggest that conditioning processes may be implicated in the design of effective pharmacotherapeutic regimens for psoriasis.
  • Further research is warranted to explore the clinical application of behavioral conditioning in dermatological treatments.