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Nephrons

Nephrons

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...

Renal Corpuscle

Renal Corpuscle

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...

Chronic Kidney Disease I: Introduction

Chronic Kidney Disease I: Introduction

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...

Acute Kidney Injury II: Pathophysiology

Acute 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...

Chronic Kidney Disease II: Clinical Manifestations

Chronic Kidney Disease II: Clinical Manifestations

Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...

Chronic Kidney Disease III: Interprofessional Care

Chronic Kidney Disease III: Interprofessional Care

Chronic kidney disease (CKD) requires collaborative and comprehensive management. CKD progresses through stages and can lead to end-stage kidney disease (ESKD) if untreated. Interprofessional collaboration and patient education are crucial, enabling patients to manage their health and improve their quality of life.Diagnostic approach for chronic kidney diseaseThe diagnosis of CKD primarily focuses on the glomerular filtration rate (GFR), which assesses kidney function by measuring how well...

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Related Experiment Video

Updated: Sep 11, 2025

Laser Ablation of the Zebrafish Pronephros to Study Renal Epithelial Regeneration

Laser Ablation of the Zebrafish Pronephros to Study Renal Epithelial Regeneration

Published on: August 29, 2011

Cellular senescence in kidney diseases.

Xiaojie Wang¹, Yujia Li¹, Qingqing Chu¹

¹Department of Pharmacology, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China.

Chinese Medical Journal

|August 15, 2025

Summary

Cellular senescence drives kidney disease progression and impairs healing. Targeting senescent cells or their secretory phenotype (SASP) offers promising therapeutic strategies for kidney disorders.

Keywords:

Cellular senescence G protein-coupled receptors Histone deacetylases Inflammation Kidney diseases

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Last Updated: Sep 11, 2025

Laser Ablation of the Zebrafish Pronephros to Study Renal Epithelial Regeneration

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Published on: August 29, 2011

SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs

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Published on: June 28, 2019

Analysis of Nephron Composition and Function in the Adult Zebrafish Kidney

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Published on: August 9, 2014

Area of Science:

Nephrology
Cell Biology
Gerontology

Background:

Cellular senescence, a state of stable cell cycle arrest, is a key mechanism in kidney diseases.
Senescent cells contribute to organ dysfunction, fibrosis, and aging, impairing renal recovery.
These cells secrete factors (senescence-associated secretory phenotype - SASP) that influence immune responses.

Purpose of the Study:

To review the mechanisms and hallmarks of cellular senescence in kidney diseases.
To highlight novel therapeutic targets and senotherapeutics for kidney disorders.

Main Methods:

Literature review of cellular senescence in kidney disease.
Analysis of SASP and its role in renal pathophysiology.
Identification of potential therapeutic targets and senotherapeutics.

Main Results:

Cellular senescence is implicated in kidney dysfunction, fibrosis, and aging.
SASP contributes to autocrine, paracrine, and endocrine effects in the kidney.
Novel therapeutic targets include epigenetic regulators, GPCRs, and lysosome-related proteins.

Conclusions:

Eliminating senescent cells or inhibiting SASP shows therapeutic potential for kidney diseases.
Senotherapeutics represent a promising new avenue for treating kidney disorders.
Understanding senescence mechanisms is crucial for developing effective kidney disease therapies.