Related Experiment Video
Updated: Feb 8, 2026

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
Published on: March 12, 2013
Aging and chromatoid body assembly: Are these two physiological events linked?
Elisa G Santos1, Maraisa A Silva2, Renata P Amorim1
11 Office of the Associate Dean of Graduate Studies and Research, Sagrado Coração University (USC), Bauru, São Paulo 17011-160, Brazil.
Aging alters chromatoid body structure and protein interactions in male germ cells, potentially impacting fertility. These changes involve key circadian clock proteins, suggesting a link between aging, circadian control, and male reproductive health.
Area of Science:
- Reproductive Biology
- Cell Biology
- Chronobiology
Background:
- The chromatoid body (CB) is crucial for mRNA regulation during spermatogenesis.
- Proteomic analysis reveals classic markers (MVH, MIWI) and transient proteins, including circadian clock components (CLOCK, BMAL1), in CBs.
Purpose of the Study:
- To investigate age-related morphological changes in chromatoid bodies of round spermatids.
- To determine if aging affects the localization and interaction of circadian proteins within CBs.
Main Methods:
- Comparative analysis of chromatoid bodies in juvenile, adult, and old male mice.
- Immunostaining for MVH, MIWI, BMAL1, and CLOCK proteins.
- Assessment of sperm count, viability, and testosterone levels to confirm aging.
Main Results:
- Juvenile and adult mice exhibited single, round chromatoid bodies.
- Old mice showed altered chromatoid body number and morphology.
- Increased interactions between MVH/BMAL1 and MIWI/CLOCK were observed in older mice.
Conclusions:
- Aging significantly impacts chromatoid body structure and physiology in post-meiotic male germ cells.
- Changes in CBs, including altered circadian protein interactions, may contribute to reduced fertility in aging males.
- Targeting CB physiology offers a potential strategy to mitigate age-related decline in male fertility.
More Related Videos
10:45A Community-based Stress Management Program: Using Wearable Devices to Assess Whole Body Physiological Responses in Non-laboratory Settings
Published on: January 22, 2018
08:53Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine
Published on: January 26, 2024
Related Concept Videos
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein....
X-linked Traits
Aging
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Integration of Synaptic Events
Sex-linked Disorders
Protein Complex Assembly
Many viruses self-assemble into a fully functional unit using the infected host cell to...