相关实验视频

Updated: Aug 1, 2026

Functional Cloning Using a Xenopus Oocyte Expression System
09:40

Functional Cloning Using a Xenopus Oocyte Expression System

Published on: January 30, 2016

克森诺普斯肝脏:雌激素反应能力的本体发生

J K Skipper, T H Hamilton

    Science (New York, N.Y.)
    |November 9, 1979
    PubMed
    概括

    雌激醇-17β显著增加了Xenopus的肝脏中的蛋白质合成. 在转化后,这种激素特别诱导肝脏组织中的维特洛根因生产.

    更多相关视频

    Using Tg(Vtg1:mcherry) Zebrafish Embryos to Test the Estrogenic Effects of Endocrine Disrupting Compounds12:02

    Using Tg(Vtg1:mcherry) Zebrafish Embryos to Test the Estrogenic Effects of Endocrine Disrupting Compounds

    Published on: August 8, 2020

    Exploring Independent Effects of Follicle-Stimulating Hormone In Vivo in a Mouse Model05:32

    Exploring Independent Effects of Follicle-Stimulating Hormone In Vivo in a Mouse Model

    Published on: August 11, 2023

    相关概念视频

    Drug Metabolism: Phase I Reactions01:17

    Drug Metabolism: Phase I Reactions

    A phase I reaction is a biochemical process that introduces a functionally reactive polar group to a substance. This transformation predominantly occurs in the liver, facilitated by the cytochrome P450 system of hemoproteins situated in the lipophilic endoplasmic reticulum of cells. The metabolite generated through this process can have varying polarities. If it is sufficiently polar, it can be easily excreted in the urine due to its water compatibility. However, if the metabolite is nonpolar,...
    Phase I Oxidative Reactions: Overview01:19

    Phase I Oxidative Reactions: Overview

    Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
    Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems01:19

    Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems

    Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
    Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
    Phase I Reactions: Reductive Reactions01:27

    Phase I Reactions: Reductive Reactions

    Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...
    Phase II Reactions: Glutathione Conjugation and Mercapturic Acid Formation01:22

    Phase II Reactions: Glutathione Conjugation and Mercapturic Acid Formation

    Glutathione, a tripeptide made up of glutamate, cysteine, and glycine, is a critical player in the detoxification of drugs and xenobiotics via a process known as glutathione conjugation or mercapturic acid formation. This phase II biotransformation reaction involves the covalent binding of glutathione to a drug or its metabolite, enhancing the compound's water solubility and enabling its excretion.
    Several distinctive characteristics distinguish glutathione conjugation from other phase II...
    Bioactivation and Tissue Toxicity01:25

    Bioactivation and Tissue Toxicity

    Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...