Aquaporins
Aquaporins - Related Videos
01:25
Aquaporins
0 Views •
2023
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.
04:21
An Assay to Detect Serum Anti-aquaporin-4 Immunoglobulin G
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2025
The video demonstrates a cell-based assay for detecting anti-aquaporin-4 immunoglobulin G using a biochip containing untransfected cells and transfected cells expressing aquaporin-4. This method has applications in diagnosing neuromyelitis optica spectrum disorders, confirmed by strong green fluorescence on the biochip.
01:56
Inducing Paralysis in a Mouse Model via Transfer of Aquaporin-4-Specific Th17 Cells
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2025
This video demonstrates the procedure of inducing paralysis by transferring activated Th17 cells targeting aquaporin-4 into a mouse model. In the central nervous system, the activated Th17 cells interact with aquaporin-4-expressing astrocytes, triggering an immune response that leads to tail and limb paralysis in the mouse.
09:29
Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4
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Cited by 10 •
2017
Here, we present a protocol to induce paralysis and opticospinal inflammation by transfer of aquaporin-4 (AQP4)-specific T cells from AQP4-/- mice into WT mice. In addition, we demonstrate how to use serial optical coherence tomography to monitor visual system dysfunction.
05:45
Human Serum Anti-aquaporin-4 Immunoglobulin G Detection by Cell-based Assay
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Cited by 5 •
2019
Cell-based assay is a widely used method to detect serum anti-aquaporin-4 immunoglobulin G. This method could be applied to clinical diagnosis and scientific researches of neuromyelitis optical spectrum disorders.
FAQs
Selective passage depends on the narrow pore, which guides water molecules through the channel in single file while excluding ions and most solutes. This combination of speed and discrimination lets membranes move water without broadly redistributing dissolved substances. The resulting control is important for maintaining hydration, cell volume, and fluid balance in biological systems.
Aquaporin activity can change in response to cellular conditions and the channel’s location within the membrane. These controls determine where and when water movement occurs rather than leaving transport constant across all membranes. Such regulation helps cells adjust water flow to physiological demands, supporting controlled hydration and fluid balance instead of uncontrolled changes in volume.
Keeping ions and most solutes out allows aquaporins to alter water movement without directly permitting those substances to cross the membrane through the same pore. This separation preserves the membrane’s selective transport properties while still enabling rapid water passage. It is especially relevant wherever cells must regulate volume or redistribute water without broadly changing solute composition.
Structural and functional studies connect the channel’s membrane organization with its selective water transport and regulation. They can clarify how pore properties support rapid passage, exclusion of ions and solutes, and control by cellular conditions or localization. This knowledge provides a basis for understanding membrane transport, disease mechanisms, and the biological regulation of fluids.
Aquaporins contribute to water regulation in several biological settings. In kidneys, they support water reabsorption; in plants, they participate in water movement; and in the brain, they help regulate fluid conditions. These examples show that the same transport principle can serve different physiological systems while contributing broadly to hydration, cell volume, and overall fluid balance.
Aquaporins may help inspire or support engineered membranes designed for efficient water purification because they combine rapid water transport with exclusion of ions and most solutes. Applying these selective properties in biotechnology could improve how membranes separate water from dissolved substances. Their study therefore connects basic membrane biology with efforts to develop more efficient purification systems.