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Related Concept Videos

Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
The Cell Cycle Control System01:28

The Cell Cycle Control System

The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
The Cell Cycle Control System02:11

The Cell Cycle Control System

The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
The Cell Cycle Control System02:11

The Cell Cycle Control System

The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
Stress01:20

Stress

When a force is applied on a body, it undergoes deformation. In order to restore the body to its original shape and/or size, an opposite or restoring force is generated within the body. This restoring force is equal to the magnitude of the applied force, but acts in the opposite direction. The amount of this restoring force developed per unit area of the body is called stress. Stress is a tensor quantity and has the SI unit pascal. Stress can be separated into four broad categories depending...

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Related Experiment Video

Updated: Jul 4, 2026

Using Microfluidic Devices to Measure Lifespan and Cellular Phenotypes in Single Budding Yeast Cells
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Using Microfluidic Devices to Measure Lifespan and Cellular Phenotypes in Single Budding Yeast Cells

Published on: March 30, 2017

1962-2007: a cell stress odyssey.

Jodie Haak1, Kevin C Kregel

  • 1Department of Integrative Physiology, The University of Iowa, 532 FH, Iowa City, IA 52242, USA.

Novartis Foundation Symposium
|June 26, 2008
PubMed
Summary

Heat shock proteins (HSPs) are conserved molecules discovered in 1962. Initially known for intracellular functions, HSPs are now recognized for their roles on cell surfaces and in extracellular fluids, influencing cellular stress responses.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Cellular stress responses are fundamental to organismal survival.
  • Heat shock proteins (HSPs) were first identified in Drosophila melanogaster larvae in 1962.
  • HSPs are highly conserved across prokaryotic and eukaryotic species.

Observation:

  • HSPs are induced by various stimuli, indicating their role in physiological adaptation.
  • Initially viewed as intracellular cytoprotective and chaperoning molecules.
  • Recent research reveals HSPs on cell surfaces and in extracellular fluids.

Findings:

  • HSPs function as molecular chaperones, aiding protein folding and assembly.
  • Extracellular HSPs act as signaling molecules.

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Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells
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Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells

Published on: May 6, 2009

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Last Updated: Jul 4, 2026

Using Microfluidic Devices to Measure Lifespan and Cellular Phenotypes in Single Budding Yeast Cells
09:18

Using Microfluidic Devices to Measure Lifespan and Cellular Phenotypes in Single Budding Yeast Cells

Published on: March 30, 2017

Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells
12:24

Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells

Published on: May 6, 2009

  • HSPs exhibit both pro-inflammatory and anti-inflammatory properties.
  • Implications:

    • HSPs are crucial in cellular stress adaptation and homeostasis.
    • The multifaceted roles of HSPs extend to immune modulation and disease.
    • Understanding HSPs is vital for comprehending cellular responses to diverse conditions.