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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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Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

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Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
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Chronic Kidney Disease I: Introduction01:25

Chronic Kidney Disease I: Introduction

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Chronic Kidney Disease (CKD) arises when the kidneys progressively lose their ability to function, ultimately leading to end-stage renal disease. At this advanced stage, the kidneys can no longer filter waste or maintain essential body functions, requiring renal replacement therapy (RRT) through dialysis or a kidney transplant for survival.Early-stage chronic kidney disease and detection challengesIn CKD's early stages, symptoms often remain absent because healthy nephrons compensate for...
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

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Acute Kidney Injury (AKI) progresses through distinct clinical phases: the oliguric, diuretic, and recovery phases, each marked by unique manifestations and challenges.Oliguric Phase:The oliguric phase is the initial stage of AKI, typically lasting 10 to 14 days. This phase is marked by a significant reduction in urine output, usually less than 400 mL per day, indicating decreased kidney function. Fluid retention is a prominent feature, leading to symptoms such as edema, hypertension, and...
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Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

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The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
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Progress in Pathogenesis of Immunoglobin A Nephropathy.

Jemima C Stanley1, Hong Deng1

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Immunoglobulin A (IgA) nephropathy is an autoimmune kidney disease caused by immune complex deposition. Understanding its pathogenesis is key to developing targeted treatments beyond current supportive or immunosuppressive therapies.

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Area of Science:

  • Nephrology
  • Immunology
  • Autoimmune Diseases

Background:

  • Immunoglobulin A (IgA) nephropathy is an autoimmune kidney disease characterized by immune complex deposition in the glomeruli.
  • The Oxford MEST classification is used to assess disease severity.
  • Pathogenesis involves anti-GalNAc antibodies targeting defective IgA1, leading to kidney damage via type 3 hypersensitivity.

Purpose of the Study:

  • To elucidate the pathogenesis of IgA nephropathy.
  • To identify risk factors and potential causes of primary and secondary IgA nephropathy.
  • To explore current and novel therapeutic strategies.

Main Methods:

  • Review of existing literature on IgA nephropathy pathogenesis, classification, and treatment.
  • Analysis of genetic predispositions and associations with other conditions like Celiac disease.
  • Discussion of diagnostic methods including immunohistochemistry, ELISA, and genetic testing.

Main Results:

  • Primary IgA nephropathy is linked to specific genetic backgrounds and defective IgA1.
  • Secondary IgA nephropathy can arise from gut dysbiosis, compromised immunity, or other systemic conditions.
  • IgA Vasculitis is a systemic manifestation of IgA nephropathy.

Conclusions:

  • Effective treatment hinges on understanding disease pathogenesis.
  • Current treatments (supportive, immunosuppressive) have limitations and side effects.
  • Novel therapies like monoclonal antibodies, dietary interventions, and stem cell replacement show promise.