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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
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The microscopic anatomy of the liver is a complex and intricate system that comprises numerous structural units known as liver lobules, each of which is comparable in size to a sesame seed. These hexagonal structures consist of plates of liver cells or hepatocytes, which are characterized by their versatility and abundance of cellular apparatus like rough and smooth ER, Golgi apparatus, peroxisomes, and mitochondria.
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The liver, an essential organ in the human body, performs over 200 vital functions that can be broadly categorized into metabolic, hematological, endocrine regulation, and bile production.
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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
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Related Experiment Video

Updated: Feb 2, 2026

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis
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MR-IMAGING IN DIAGNOSTICS OF FOCAL LIVER LESIONS.

S S Bagnenko, G E Trufanov, I S Zheleznyak

    Vestnik Khirurgii Imeni I. I. Grekova
    |November 17, 2018
    PubMed
    Summary

    Magnetic resonance imaging (MRI) effectively diagnoses focal liver lesions. Hepatotropic contrast agents offer the highest diagnostic accuracy, improving patient outcomes.

    Area of Science:

    • Medical Imaging
    • Radiology
    • Hepatology

    Background:

    • Focal liver lesions present diagnostic challenges.
    • Accurate differentiation is crucial for effective treatment planning.

    Purpose of the Study:

    • To evaluate the diagnostic efficacy of various magnetic resonance (MR) imaging techniques for focal liver lesions.
    • To determine the role of different MR contrast agents in the differential diagnosis of liver pathologies.

    Main Methods:

    • Analysis of 414 liver lesions in 256 patients.
    • Comparison of conventional MR imaging, dynamic contrast-enhanced (DCE) MRI, and MR imaging with hepatotropic contrast agents.
    • Assessment of MR diffusion imaging for lesion characterization.

    Main Results:

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    • Conventional MR imaging without contrast had limited efficacy (58% model accuracy).
    • Dynamic contrast-enhanced MRI improved diagnostic accuracy (67% model accuracy).
    • MR imaging with hepatotropic contrast agents demonstrated the highest efficacy (80% model accuracy).
    • MR diffusion imaging is effective for visualization but limited in differential diagnosis.

    Conclusions:

    • Hepatotropic contrast-enhanced MRI is the most effective method for the differential diagnosis of focal liver lesions.
    • Dynamic contrast-enhanced MRI provides valuable diagnostic information.
    • Conventional MRI and MR diffusion have limitations in differentiating focal liver lesions.