相关实验视频
Updated: May 7, 2026

06:11
Culturing Primary Rat Inner Medullary Collecting Duct Cells
Published on: June 21, 2013
14.7K
呈现了"水素:动态作用和调节"特别号
Marianna Ranieri1, Grazia Tamma1
1Department of Biosciences, Biotechnologies and Environment, University of Bari, 70125 Bari, Italy.
International journal of molecular sciences
|May 14, 2025
概括
水素 (AQP) 是水通道,对细胞水化至关重要. 它们在人类红细胞中的发现彻底改变了我们对膜运输的理解.
科学领域:
- 膜生物学 膜生物学
- 生物物理学的生物物理.
背景情况:
- 水蛋白 (AQPs) 是一种完整的膜蛋白,可以促进水的运输.
- 在1987年首次在人体红细胞中发现,AQPs形成四重体结构,每个单体作为通道.
研究的目的:
- 审查发现和初步表征水族的情况.
- 为了突出水素在人体红细胞中起的重要作用.
- 为后续关于水素素功能和调节的研究提供背景.
主要方法:
- 关于aquaporin发现的开创性出版物的文献综述.
- 分析早期的实验数据,描述红细胞水道的特征.
- 关于AQP发现影响的历史视角.
主要成果:
- 红细胞中特定的水通道的识别,后来被称为aquaporins.
- 展示了AQPs在快速奥斯莫斯式水运动中的作用.
- 建立AQP作为一种独特的运输蛋白类别.
结论:
- 在人体红细胞中发现水素素的发现为新的研究领域奠定了基础.
- AQP对于维持细胞和生物体的水平衡至关重要.
- 进一步的研究继续揭示水利素在健康和疾病中的多样性作用.
相关概念视频
Osmoregulation in Fishes
48.9K
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
48.9K
Aquaporins
5.1K
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.
5.1K
Reabsorption and Secretion in the DCT and Collecting Duct
4.2K
The early phase of the DCT manages the reabsorption of approximately 10-15% of filtered water, 5–10% of filtered sodium, and 5–10% of filtered chloride. This process is facilitated by Na+–Cl− symporters in apical membranes and sodium-potassium pumps, as well as Cl− leakage channels in basolateral membranes. The early DCT also stands out as a site where parathyroid hormone (PTH) stimulates calcium reabsorption, depending on the body's requirements.
The distal...
The distal...
4.2K
Regulation of Water Intake
2.3K
Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
2.3K
Regulation of Water Output
2.0K
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
2.0K
Physiology of the Genitourinary System III: Urine Concentration and Dilution
1.5K
The kidneys concentrate or dilute urine to maintain water and electrolyte balance. Nephrons, particularly the loop of Henle, play a crucial role in this process through the countercurrent multiplication system. This system establishes a high osmolarity in the renal medulla, which is essential for water reabsorption. In the loop of Henle’s descending limb, water is reabsorbed into the surrounding medulla due to its permeability to water. In contrast, the ascending limb actively transports...
1.5K

