Related Experiment Video
Updated: Aug 2, 2026
05:39
Detection of MicroRNA Expression in the Kidneys of Immunoglobulin A Nephropathic Mice
Published on: July 8, 2020
Pathogenesis of idiopathic IgA nephropathy
1Renal Unit, United Medical School, Guy's Hospital, London, UK.
Pediatric Nephrology (Berlin, Germany)
|June 1, 1993
Summary
IgA nephropathy involves overproduction of immunoglobulin A (IgA) by the bone marrow, challenging previous theories. Research suggests this common kidney disease may have multiple causes, not a single mechanism.
Area of Science:
- Nephrology
- Immunology
- Pathophysiology
Background:
- IgA nephropathy (IgAN) pathogenesis remains poorly understood despite extensive research.
- Previous theories focused on mucosal IgA production, but new evidence points to bone marrow overproduction.
Purpose of the Study:
- To review current understanding of IgA nephropathy pathogenesis.
- To explore the role of bone marrow in IgA overproduction in IgAN.
- To critically evaluate prevailing theories and propose a multifactorial etiology.
Main Methods:
- Review of existing literature on IgA physiology and IgAN immunopathology.
- Analysis of IgA characteristics (subclass, charge, light chains) in affected individuals.
- Evaluation of antigen specificities in IgA deposits.
Main Results:
- Bone marrow overproduces immunoglobulin A (IgA) in IgAN, contributing significantly to disease.
- IgA in IgAN exhibits specific characteristics: IgA1 subclass, higher lambda light chains, and negative charge.
- Widespread IgA specificities suggest polyclonal B cell activation, not a specific antigen-induced immune complex formation.
Conclusions:
- IgA nephropathy may not be a single disease entity with a unified pathogenetic mechanism.
- Multiple factors, including bone marrow IgA overproduction and potential autoimmune components, likely contribute to IgAN.
- Further research is needed to unravel the complex etiology of this common kidney disease.
More Related Videos
14:18Dioscin Mediated IgA Nephropathy Alleviation by Inhibiting B Cell Activation In Vivo and Decreasing Galactose-Deficient IgA1 Production In Vitro
Published on: October 13, 2023
07:15Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway
Published on: August 23, 2024
Related Concept Videos
01:25Urinary Tract Infection II: Pathophysiology
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...
01:24Nephrotic Syndrome I : Introduction
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 fluid...
01:29Acute Kidney Injury II: Pathophysiology
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...
01:27Streptococcal Pharyngitis
Streptococcal pharyngitis, commonly known as “strep throat,” is an acute infection of the oropharyngeal tissues caused by the Gram‑positive Group A Streptococcus (Streptococcus pyogenes). Transmission occurs primarily through respiratory droplets expelled during coughing, sneezing, or talking.Mechanisms of Host Entry and Immune EvasionUpon entering the host, S. pyogenes adheres to the mucosal epithelial cells of the pharynx via surface proteins, notably lipoteichoic acid and the antiphagocytic...
01:28Diabetic Nephropathy
Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...
01:26Encephalitis ll: Pathophysiology
Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...