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相关概念视频

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

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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.
Drugs such as carbonic anhydrase inhibitors, α2- and...
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There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
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相关实验视频

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A Fluorescence-based Assay of Phospholipid Scramblase Activity
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脂相互转换和运输在玻璃眼中发生了变化.

Genea Edwards1,2, Ruminder Kaur1,3, Anna Mueller1,3

  • 1Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miami, Florida, USA.

FASEB journal : official publication of the Federation of American Societies for Experimental Biology
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PubMed
概括

玻璃眼瘤与脂的改变以及眼睛排水系统中酸酶脱酶 (PSD) 活性增加有关. 调节PSD水平直接影响眼内压力 (IOP),为玻璃眼提供新的治疗点.

关键词:
水性幽默的水性幽默是什么玻璃眼 glaucoma 玻璃眼 玻璃眼 玻璃眼 玻璃眼脂酸是一种脂酸.主要开角绿眼 glaucoma 的情况.状网状网状网状网状网状网状网.

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科学领域:

  • 眼睛生物学 眼睛生物学
  • 脂质代谢 脂质代谢 是一种
  • 眼研究研究的研究.

背景情况:

  • 玻璃眼,不可逆转的失明的主要原因,涉及由于水性皮质 (AH) 出流受损的眼内压力 (IOP) 升高.
  • 带状网 (TM) 对于AH外流至关重要,其功能障碍与初级开角玻璃眼 (POAG) 有关.

研究的目的:

  • 为了研究脂 (PLs) 和酶脂脱氧化酶 (PSD) 在青光眼患者的TM中的作用.
  • 探索潜在的脂质运输异常及其与玻璃眼中IOP调节的联系.

主要方法:

  • 从绿眼病患者和正常压力对照的TM组织中分析脂水平和PSD活性.
  • 实验性操纵小鼠PSD水平,以评估其对IOP的影响.
  • 在绿眼病模型中识别特定的眼睛脂质物种和脂质载体变化.

主要成果:

  • 患有POAG的个体表现出改变的PL水平和TM中的PSD活性增加.
  • 在正常血压小鼠中提高PSD会增加内血压,而在青光眼小鼠中减少PSD会恢复正常内血压.
  • 特定的PLs显示TM和AH的水平可变,表明脂质运输缺陷,其中涉及脂质运输体ATP8B2的水平变化.

结论:

  • PSD活动是IOP的关键调节者,也是青光眼的潜在治疗点.
  • 特定的脂和脂质载体ATP8B2的变化可能会通过影响TM内的脂质运输和功能来促进青光眼病原体.