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Related Concept Videos

Aquaporins01:25

Aquaporins

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Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
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Glomerular Filtration01:15

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The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
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Multi-pass Transmembrane Proteins and β-barrels01:09

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In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
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Cell division and enlargement are processes that require precise control. The control ensures that cell division cannot proceed unless the cell has grown to a specific size. A spherical, dividing cell requires an approximately 1.6X increase in its surface area to double its volume. The secretory pathway also has a significant role in cell membrane enlargement. Secretory vesicles that bud off from the Golgi apparatus and later fuse with the plasma membrane during exocytosis are a major source of...
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Renal Corpuscle01:20

Renal Corpuscle

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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
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Tight Junctions

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Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
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Related Experiment Video

Updated: Apr 21, 2026

Author Spotlight: Generation of Patient-Derived Podocytes from Skin Biopsies
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Author Spotlight: Generation of Patient-Derived Podocytes from Skin Biopsies

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Podocytes: recent biomolecular developments.

Silvia Armelloni, Alessandro Corbelli, Laura Giardino

    Biomolecular Concepts
    |November 6, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Podocyte cells are crucial for kidney function and filtration. Understanding podocyte biology and pathology is key to developing new treatments for proteinuric glomerular diseases.

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    Area of Science:

    • Nephrology
    • Cell Biology
    • Glomerular Filtration

    Background:

    • Podocytes are specialized renal glomerular cells forming an intricate filtration barrier.
    • Their complex architecture is essential for preventing protein leakage into urine.
    • Podocyte dysfunction is central to all proteinuric glomerular diseases.

    Purpose of the Study:

    • To review recent advancements in podocyte biology and pathology.
    • To highlight the role of podocyte molecules and signaling in glomerular filter function.
    • To explore potential therapeutic targets for proteinuric diseases.

    Main Methods:

    • Review of current scientific literature and recent discoveries.
    • Analysis of morphological changes in podocyte architecture.
    • Examination of genetic mutations affecting podocyte proteins.

    Main Results:

    • Podocyte failure is implicated in all proteinuric glomerular diseases.
    • Mutations in podocyte proteins cause severe congenital nephrotic syndrome.
    • Technological advances have improved understanding of podocyte function and disease.

    Conclusions:

    • Podocyte biology is critical for maintaining glomerular filter integrity.
    • Further research into podocyte molecules and pathways may lead to novel therapies.
    • Detailed knowledge of podocytes offers hope for treating proteinuric kidney diseases.