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Related Concept Videos

Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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Glaucoma: Overview01:25

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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Ion Channels01:19

Ion Channels

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The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
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G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
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Non-gated Ion Channels01:24

Non-gated Ion Channels

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Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
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Related Experiment Video

Updated: Jun 15, 2025

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
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Mechanosensitive ion channels in glaucoma pathophysiology.

Julian Garcia-Sanchez1, Danting Lin1, Wendy W Liu1

  • 1Spencer Center for Vision Research, Byers Eye Institute, Stanford University School of Medicine, Palo Alto, CA, USA.

Vision Research
|August 24, 2024
PubMed
Summary
This summary is machine-generated.

Mechanosensitive ion channels in the eye sense mechanical forces, potentially impacting intraocular pressure and retinal ganglion cell survival in glaucoma. Understanding these channels is key to glaucoma research.

Keywords:
GlaucomaIOP regulationK2P channelsMechanosensitive ion channelsMechanotransductionPIEZO channelsRGC survivalTRP channels

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Area of Science:

  • Ocular physiology
  • Mechanobiology
  • Neuroscience

Background:

  • The eye experiences mechanical forces from blinking and eye movements.
  • Elevated intraocular pressure (IOP) causes mechanical strain, leading to retinal ganglion cell death (RGC) in glaucoma.
  • The mechanisms of cellular force sensing in the eye are not fully understood.

Purpose of the Study:

  • To review the role of mechanosensitive ion channels in ocular mechanotransduction.
  • To explore the involvement of these channels in glaucoma pathophysiology.
  • To highlight PIEZO, two-pore potassium, and transient receptor potential channels in ocular pressure sensing.

Main Methods:

  • Literature review focusing on mechanosensitive ion channels in ocular tissues.
  • Analysis of studies on PIEZO, two-pore potassium, and transient receptor potential channels.
  • Examination of genetic associations with primary open-angle glaucoma.

Main Results:

  • Mechanosensitive ion channels are present in ocular tissues relevant to glaucoma.
  • These channels may regulate IOP and influence RGC survival.
  • Genetic variants in mechanosensitive channels are linked to primary open-angle glaucoma risk.

Conclusions:

  • Mechanosensitive channels are crucial for sensing pressure signals in the eye.
  • These channels represent potential therapeutic targets for glaucoma.
  • Further research into ocular mechanosensitive channels is warranted for glaucoma treatment.