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Preclinical Development: Overview01:28

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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...
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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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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.
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Direct-acting cholinergic agonists have many therapeutic uses in various medical fields. Choline esters, including acetylcholine, have limited clinical utility due to their non-selectivity and short duration of action. Still, acetylcholine and carbachol are applied topically during ophthalmologic surgery to induce miosis. Pilocarpine, a muscarinic and ganglionic stimulator, effectively treats open-angle glaucoma and alleviates xerostomia and dry mouth caused by radiotherapy or Sjögren...
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Product specifications define the acceptable quality of a pharmaceutical product by ensuring identity, purity, potency, and strength. These specifications serve as benchmarks during development, manufacturing, and post-approval quality control. Clinically relevant specifications are particularly important because they directly relate to a drug's safety and efficacy in clinical use.Dissolution studies are critical biopharmaceutic tools that link in vitro behavior to in vivo performance. They...
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Macroprolactin: From laboratory to clinical practice.

Betina Biagetti1, Roser Ferrer Costa2, Rocío Alfayate Guerra3

  • 1Servicio de Endocrinología y Nutrición, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, España.

Endocrinologia, Diabetes Y Nutricion
|April 27, 2021
PubMed
Summary

Macroprolactinemia, a common cause of diagnostic errors, requires standardized screening and reporting. This study aims to establish optimal macroprolactin screening strategies and reporting guidelines for hyperprolactinemia to improve patient management.

Keywords:
Big prolactinGran prolactinaMacroprolactinMacroprolactinaPolietilenglicolPolyethylene glycolProlactinProlactina

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Area of Science:

  • Endocrinology
  • Clinical Chemistry

Background:

  • Prolactin measurement is crucial for diagnosing various conditions, including pituitary adenomas, infertility, and menstrual disorders.
  • Inaccurate interpretation of prolactin levels, without considering clinical context, leads to misdiagnoses and inappropriate treatments.
  • Macroprolactinemia, characterized by high levels of a less biologically active prolactin variant, is a frequent cause of diagnostic errors.

Framework:

  • This study evaluates two macroprolactin screening strategies: universal screening versus a clinically guided approach.
  • It also addresses the lack of consensus on reporting prolactin and macroprolactin levels after polyethylene glycol (PEG) precipitation.

Implementation:

  • The research aims to define the optimal strategy for macroprolactin screening in patients with hyperprolactinemia.
  • It seeks to develop a consensus document for standardizing the reporting of prolactin results post-PEG precipitation.

Implications:

  • Standardized screening and reporting of macroprolactinemia will minimize diagnostic errors and improve patient management.
  • Establishing clear guidelines will enhance the accuracy of prolactin level interpretation in clinical practice.