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相关概念视频

Nephrons01:10

Nephrons

2.1K
The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
2.1K
Renal Corpuscle01:20

Renal Corpuscle

1.6K
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
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
1.6K
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

53
Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
53
Renal Tubule and Collecting Duct01:24

Renal Tubule and Collecting Duct

770
The renal tubule is divided into three parts: the proximal convoluted tubule (PCT), the Loop of Henle (LOH), and the distal convoluted tubule (DCT).
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
770
Drug Elimination by Renal Route: Tubular Secretion01:15

Drug Elimination by Renal Route: Tubular Secretion

2.1K
Once the process of glomerular filtration is completed, blood carrying unfiltered drug molecules traverses through efferent arterioles and makes its way into the peritubular capillaries in the proximal tubule. A variety of carriers play a pivotal role in actively secreting drugs from these peritubular capillaries into the tubular fluid. The organic anion transporter transfers acidic drugs, against an electrochemical gradient, from the peritubular capillaries into the renal tubule cells and...
2.1K
Formation of Dilute Urine01:20

Formation of Dilute Urine

1.3K
The formation of dilute urine is a critical renal adaptation that maintains fluid balance, particularly during periods of high fluid intake. This process primarily involves the juxtamedullary nephrons. By adjusting the permeability of water and ions in response to physiological conditions, the kidneys can either conserve or excrete water, resulting in concentrated or dilute urine.
Filtrate Osmolarity in the PCT
Initially, as the filtrate passes through the proximal convoluted tubule (PCT), its...
1.3K

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相关实验视频

Updated: Jun 4, 2025

Implementing Patch Clamp and Live Fluorescence Microscopy to Monitor Functional Properties of Freshly Isolated PKD Epithelium
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Implementing Patch Clamp and Live Fluorescence Microscopy to Monitor Functional Properties of Freshly Isolated PKD Epithelium

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在多囊性病进展期间,肠道屏障功能下降.

Randee Sedaka1, Caleb Lovelady1, Emily Hallit1

  • 1Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Alabama, United States.

American journal of physiology. Renal physiology
|December 18, 2024
PubMed
概括

在自身主导性多囊性病 (ADPKD) 中,损伤先于肠道问题. 早期阶段显示了更紧的肠道屏障,随着囊的进展,它变得漏水,影响水平衡.

关键词:
在 ADPKDD 中,结肠结肠结肠结肠是什么意思诚信的完整性 诚信的完整性运动性 运动性水水水的水水的水

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科学领域:

  • 脏病学和胃肠道学
  • 分子生物学和遗传学分子生物学和遗传学
  • 疾病的病原发生 疾病的病原发生

背景情况:

  • 自体主导多囊性病 (ADPKD) 的特点是囊的发展,主要是由于PKD1突变.
  • 在ADPKD中,特异性Pkd1损失导致上皮功能障碍和炎症.
  • 在ADPKD中Pkd1损失对肠道的影响在很大程度上仍未被探索.

研究的目的:

  • 调查Pkd1损失导致肠上皮质屏障功能障碍和炎症导致ADPKD细胞发生的假设.
  • 在ADPKD小鼠模型中评估脏和肠道完整性,炎症和肠道功能.

主要方法:

  • 使用可诱导,全球Pkd1淘汰赛 (Pkd1KO) 的小鼠和对照 littermates.
  • 在疾病的早期 (3个月) 和晚期 (6个月) 阶段评估和肠道表型.
  • 分析了脏和肠道完整性标志物,炎症,肠道运动性和便水分泌.

主要成果:

  • 早期的Pkd1KO小鼠表现出轻微的脏囊,但肠道屏障更紧,没有炎症.
  • 晚期Pkd1KO小鼠表现出严重的囊,功能受损,肠道屏障泄漏,炎症增加.
  • 无论年龄,Pkd1KO小鼠的肠道运动性和便水分泌量都增加.

结论:

  • 在ADPKD中,损伤先于肠损伤,随着囊发生的进展,肠道屏障变得受到损害.
  • 渐进的肠壁功能障碍和改变的水/运输有助于ADPKD病理生理学.
  • 外流失是ADPKD进展的重要因素,需要进行临床评估.