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Related Concept Videos

Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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Glomerular Filtration01:15

Glomerular Filtration

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The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
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Renal Corpuscle01:20

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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...
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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Nephrons01:10

Nephrons

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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...
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Glomerular Filtration Rate and its Regulation01:28

Glomerular Filtration Rate and its Regulation

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The Glomerular Filtration Rate (GFR) is a measure of kidney function, reflecting the volume of filtrate formed per minute in the kidneys. On average, GFR is approximately 125 mL/min in males and 105 mL/min in females. Maintaining a relatively constant GFR is essential for the kidneys to effectively regulate body fluid homeostasis and maintain extracellular stability.
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
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Related Experiment Video

Updated: Jan 10, 2026

Nephrotic Syndrome I : Introduction
01:24

Nephrotic Syndrome I : Introduction

Published on: June 19, 2025

476

Avian flu to human influenza.

David B Lewis1

  • 1Department of Pediatrics and Program in Immunology, Stanford University School of Medicine, Stanford, California 94305, USA. dblewis@stanford.edu

Annual Review of Medicine
|January 18, 2006
PubMed
Summary

Avian influenza A (H5N1) poses a pandemic threat due to its high virulence and potential for human transmission. Current vaccines and antivirals have limitations, necessitating research into new strategies like T-cell responses.

Area of Science:

  • Virology
  • Epidemiology
  • Immunology

Background:

  • Influenza A viral infections cause significant global morbidity and mortality annually.
  • Avian influenza A (H5N1) strains are increasingly found in mammals, raising pandemic concerns.
  • Existing human populations have limited immunity to H5N1, increasing pandemic risk.

Purpose of the Study:

  • To assess the pandemic potential of H5N1 avian influenza.
  • To highlight limitations in current influenza treatments and vaccine strategies.
  • To explore alternative vaccine approaches for enhanced protection.

Main Methods:

  • Review of current scientific literature on H5N1 avian influenza.
  • Analysis of H5N1 transmission dynamics and virulence factors.

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Related Experiment Videos

Last Updated: Jan 10, 2026

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Glomerular Filtration
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Glomerular Filtration

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Renal Corpuscle
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  • Evaluation of existing antiviral treatments and vaccine efficacy.

    • Main Results:

    • H5N1 strains have demonstrated high virulence and cross-species transmission.
    • Current vaccines primarily rely on antibody neutralization, which may be insufficient for H5N1.
    • Antiviral treatments and vaccine production face significant challenges.

    Conclusions:

    • H5N1 avian influenza represents a serious pandemic threat.
    • Future influenza vaccines should aim for broader protection, including robust T-cell responses.
    • Enhanced T-cell immunity may offer superior protection against highly virulent influenza strains.