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Related Concept Videos

Additional Routes of Drug Administration01:18

Additional Routes of Drug Administration

Choosing the appropriate route of drug administration is significantly influenced by two key factors: the therapeutic objectives and the inherent properties of the drug being used.
Administering drugs via inhalation allows for the direct delivery of gaseous, volatile substances or droplets to different parts of the respiratory tract. One of the advantages of the inhalation route is the rapid absorption of drugs into the circulatory system, which is possible because of the large surface area of...
Drug Delivery: Miscellaneous Routes01:22

Drug Delivery: Miscellaneous Routes

Drug delivery methods like oral inhalation, nasal sprays, transdermal patches, eye drops, intravitreal injection,  and rectal administration provide localized effects with reduced toxicity.
Oral inhalation and nasal sprays swiftly transfer drugs across the respiratory epithelium's mucosal layer. Inhaled glucocorticoids and bronchodilators directly target lung conditions such as asthma, while fluticasone nasal spray mitigates allergic rhinitis.
Transdermal patches transport drugs through the...
Drug Abuse and Addiction: Pharmacological Phenomena01:15

Drug Abuse and Addiction: Pharmacological Phenomena

Drug dependence, abuse, and addiction are complex phenomena that can precipitate various abnormal states. Physical dependence refers to a state of pharmacological adaptation to a drug. This adaptation often results in tolerance—a reduced response to the drug after repeated administrations. When the drug use is abruptly stopped, withdrawal symptoms occur due to the body's need to readjust from the pharmacologically induced imbalance. However, tolerance and withdrawal symptoms do not necessarily...
Drug Dependence01:17

Drug Dependence

Medications are typically administered to achieve therapeutic effects. Some drugs can modify an individual's mood and perception, frequently resulting in various enjoyable experiences. However, this can result in drug dependency, a condition marked by continuous drug use despite potential negative consequences. Drug dependency primarily falls into two categories: psychological and physical dependence. Psychological dependence occurs when the pleasurable feelings induced by the drug...
Drug Delivery: Overview01:16

Drug Delivery: Overview

The selection of a drug's delivery route depends upon its physicochemical properties, including lipid or water solubility and ionization, as well as the therapeutic requirement, such as immediate or sustained effect. These routes can be divided into three primary categories: enteral, parenteral, and topical.
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Drugs Affecting Neurotransmitter Release or Uptake01:21

Drugs Affecting Neurotransmitter Release or Uptake

Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...

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Drugging Ras trafficking-are there new roads to travel?

Elisabeth Schaffner-Reckinger1, Atanasio Gómez-Mulas1, Daniel Kwaku Abankwa2

  • 1Cancer Cell Biology and Drug Discovery Group, Department of Life Sciences and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg.

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Summary

Targeting Ras protein trafficking offers new therapeutic opportunities beyond direct inhibitors. Understanding Ras function in organelles is key for future cancer treatments, particularly in cell differentiation.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Ras protein signaling is crucial in cancer development.
  • Early cancer therapies targeted Ras protein trafficking.
  • Direct Ras inhibitors have emerged, seemingly making trafficking inhibition outdated.

Purpose of the Study:

  • To re-evaluate the potential of targeting Ras trafficking in cancer therapy.
  • To explore novel therapeutic strategies by understanding Ras function in specific organelles.
  • To identify future opportunities in targeting Ras for cell differentiation and cancer treatment.

Main Methods:

  • Review of existing literature on Ras trafficking and inhibition.
  • Analysis of the role of specific organelles in Ras signaling pathways.
  • Discussion of potential future research directions and therapeutic targets.

Main Results:

  • Ras trafficking inhibition, while historically significant, may still hold untapped potential.
  • Specific organelle-associated Ras functions, particularly in cell differentiation, present new therapeutic avenues.
  • Further research into Ras localization and dynamics is warranted.

Conclusions:

  • Targeting Ras trafficking hubs could offer alternative or complementary strategies to direct Ras inhibition.
  • Understanding Ras function within distinct cellular compartments is essential for developing next-generation cancer therapies.
  • Future research should focus on exploiting organelle-specific Ras activities for clinical benefit.