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Lampbrush Chromosomes

Lampbrush Chromosomes

In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops resemble the...

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Related Experiment Video

Updated: May 21, 2026

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood

Published on: April 16, 2012

Age-related decrease of the LAMP-2 gene expression in human leukocytes.

Jian Huang¹, Jing Xu, Shuchao Pang

¹Shandong Provincial Key Laboratory of Cardiac Disease Diagnosis and Treatment, Jining Medical College Affiliated Hospital, Jining Medical College, Jining, Shandong 272029, China.

Clinical Biochemistry

|June 27, 2012

Summary

This summary is machine-generated.

Autophagy activity, crucial for cellular health, declines with age. This study found reduced levels of LAMP-2, a key protein for autophagy, in older adults, suggesting impaired cellular cleanup processes in aging.

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Published on: November 10, 2012

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Last Updated: May 21, 2026

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood

Published on: April 16, 2012

Monitoring of Ubiquitin-proteasome Activity in Living Cells Using a Degron (dgn)-destabilized Green Fluorescent Protein (GFP)-based Reporter Protein

Monitoring of Ubiquitin-proteasome Activity in Living Cells Using a Degron (dgn)-destabilized Green Fluorescent Protein (GFP)-based Reporter Protein

Published on: November 10, 2012

Area of Science:

Cellular biology
Aging research
Molecular mechanisms of disease

Background:

Autophagy is a vital cellular degradation process involved in numerous physiological functions.
Dysfunctional autophagy is linked to various age-related diseases.
Systematic investigation of autophagy in human tissues and cells remains limited.

Purpose of the Study:

To investigate age-related changes in autophagy activity in human peripheral leukocytes.
To examine the expression of Lysosomal Associated Membrane Protein-2 (LAMP-2), a critical protein in autophagy.

Main Methods:

Analysis of LAMP-2 gene expression and protein levels in peripheral blood leukocytes.
Comparison of LAMP-2 levels across different age groups of healthy subjects over 40 years old.

Main Results:

Significant age-related decrease in both LAMP-2 transcript and protein levels observed in individuals aged 65-69 and over 70, compared to the 40-44 age group.
No significant differences in LAMP-2 levels were found between male and female participants.
These findings indicate a progressive decline in LAMP-2 expression with advancing age.

Conclusions:

The study demonstrates a progressive, age-related decline in LAMP-2 gene expression in peripheral leukocytes of healthy individuals.
This decrease in LAMP-2 suggests a corresponding trend of reduced autophagy activity with aging.
Implications for understanding cellular aging and age-related diseases.