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Related Concept Videos

Molecular Models02:00

Molecular Models

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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as the...
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The two-compartment model divides the body into central and peripheral compartments to account for varying blood perfusion rates among organs and tissues, affecting drug distribution. The central compartment includes blood and highly perfused tissues with rapid drug distribution, while the peripheral compartment contains tissues with slower drug distribution. After a single IV bolus dose, the drug concentration is high in plasma and low in tissues. The drug distribution between compartments...
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Drug clearance is a critical pharmacokinetic process involving the irreversible removal of drugs from the body through various organs over a specified time period. Physiological models are indispensable in determining organ-specific clearance, defined by the proportion of the drug eliminated per unit of time from the organ's blood volume.
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Clearance Models: Compartment Models01:25

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Clearance measures drug elimination from the central compartment, including plasma and highly perfused organs like kidneys and liver. Its calculation varies depending on pharmacokinetic models and administration routes. The one-compartment model, for instance, portrays the pharmacokinetics of polar drugs such as aminoglycoside antibiotics administered intravenously and readily excreted in urine. In this case, clearance is influenced by the terminal rate constant (λz) and the total volume...
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Generation of Comprehensive Thoracic Oncology Database - Tool for Translational Research
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[The zebrafish model in oncology].

Pamela Völkel1, Babara Dupret2, Xuefen Le Bourhis2

  • 1CNRS Lille, Inserm U908, Université de Lille, Bâtiment SN3, Cité Scientifique, 59655 Villeneuve d'Ascq, France.

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The zebrafish model offers unique advantages for in vivo cancer research, enabling the study of tumor development and the identification of new cancer therapies. Its utility spans spontaneous, chemically induced, and genetically manipulated cancers, mirroring human tumors.

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Area of Science:

  • Comparative oncology
  • Zebrafish models in cancer research
  • In vivo cancer biology

Background:

  • Cell culture and mouse models are standard in cancer research.
  • Zebrafish offer unique capabilities for in vivo cancer studies.
  • Understanding cancer biology requires versatile model organisms.

Purpose of the Study:

  • To review the diverse applications of the zebrafish model in cancer research.
  • To highlight zebrafish's potential in understanding cancer biology.
  • To discuss zebrafish's role in discovering anti-cancer therapeutics.

Main Methods:

  • Induction of spontaneous, chemical, or genetic cancers in zebrafish.
  • Histological and molecular analysis of zebrafish-induced tumors.
  • Xenotransplantation of human cancer cells into zebrafish.
  • High-throughput screening of molecules using zebrafish embryos.

Main Results:

  • Zebrafish develop cancers that are histologically and molecularly similar to human tumors.
  • The model allows in vivo study of tumor initiation, progression, and heterogeneity.
  • Xenotransplantation enables tracking of cancer cell behavior in a living organism.
  • Zebrafish embryo screens facilitate the discovery of novel anti-cancer drugs.

Conclusions:

  • The zebrafish model is a powerful tool for in vivo cancer research.
  • It provides insights into fundamental cancer biology and tumor progression.
  • Zebrafish contribute significantly to the identification of new anti-cancer strategies.