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Related Concept Videos

Aging01:26

Aging

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Necrosis01:16

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Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
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The Effect of Aging on Tissues01:19

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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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Factors Affecting Erythropoiesis01:24

Factors Affecting Erythropoiesis

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The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
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EPO then...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
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Related Experiment Video

Updated: Oct 7, 2025

Assessing Iron Deposition in the Brains of 5xFAD Mice by Perls'/DAB Staining
07:32

Assessing Iron Deposition in the Brains of 5xFAD Mice by Perls'/DAB Staining

Published on: May 23, 2025

518

Aging is associated with increased brain iron through cortex-derived hepcidin expression.

Tatsuya Sato1, Jason Solomon Shapiro1, Hsiang-Chun Chang1

  • 1Feinberg Cardiovascular and Renal Research Institute, Northwestern University School of Medicine, Chicago, United States.

Elife
|January 11, 2022
PubMed
Summary
This summary is machine-generated.

Aging increases iron in the brain

Keywords:
AgingIronmedicinemouseoxidative stress

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Aging Research

Background:

  • Iron is vital for biological functions but excess iron causes oxidative stress, contributing to aging and neurodegenerative diseases.
  • The specific mechanisms and cellular locations of age-related iron accumulation remain unclear.

Purpose of the Study:

  • To investigate the tissue-specific and subcellular distribution of iron during aging.
  • To elucidate the molecular mechanisms underlying age-related iron dysregulation in the brain.

Main Methods:

  • Quantified non-heme iron levels in cytosolic and mitochondrial compartments across various tissues of aged mice.
  • Assessed hepcidin and ferroportin-1 (FPN1) expression and protein levels, including FPN1 ubiquitination, in aged brain tissue.

Main Results:

  • Aged mice showed increased cytosolic non-heme iron in the liver and muscle.
  • The aged brain cortex uniquely exhibited increased cytosolic and mitochondrial non-heme iron.
  • Elevated brain hepcidin correlated with increased FPN1 ubiquitination and reduced FPN1 levels, suggesting impaired iron export.

Conclusions:

  • Aging leads to specific iron accumulation in the brain's cytosol and mitochondria, unlike other tissues.
  • Increased local hepcidin expression in the brain appears to drive iron accumulation by reducing ferroportin-1-mediated iron export.