Related Experiment Video
Updated: Jul 5, 2026
08:34
RNA Interference-based Investigation of the Function of Heat Shock Protein 27 during Corneal Epithelial Wound Healing
Published on: September 27, 2016
Heat shock proteins in the skin
C Jonak1, G Klosner, F Trautinger
1Department of Dermatology, Medical University of Vienna, Vienna, Austria.
International Journal of Cosmetic Science
|May 21, 2008
Summary
Heat shock proteins (hsp) protect cells from stress and are crucial for survival. In human skin, hsp27 is a marker for keratinocyte differentiation and its levels change with aging.
Area of Science:
- Cellular Biology
- Stress Response
- Dermatology
Background:
- Heat shock proteins (hsp) are vital cellular components, induced by stress and essential for survival.
- HSPs function as molecular chaperones, aiding protein folding, transport, and interactions.
- In human epidermis, HSPs are linked to cell differentiation and photobiology.
Purpose of the Study:
- To investigate the role of heat shock proteins (hsp) in human epidermal keratinocytes.
- To explore the correlation between hsp27 expression and keratinocyte differentiation.
- To examine the impact of aging on hsp expression in the skin.
Main Methods:
- Analysis of heat shock protein expression in human epidermal keratinocytes.
- Correlation studies between hsp27 levels and keratinocyte differentiation markers.
- Investigation of hsp expression changes in aged skin samples.
Main Results:
- Heat shock exposure protects cells from UV-induced damage and induces hsp expression.
- hsp27 expression in keratinocytes increases with differentiation, serving as a differentiation marker.
- hsp72 levels are stable in intrinsic aging, while hsp27 is elevated in aged, sun-protected skin.
Conclusions:
- HSPs play a significant role in epidermal homeostasis and stress response.
- hsp27 is a key marker for epidermal differentiation and is altered in aged skin.
- Future pharmacological interventions targeting HSP regulation may prevent skin damage and differentiation disorders.
Related Concept Videos
02:45Responses to Heat and Cold Stress
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
01:30Other Stress Responses in Bacteria
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
01:25Body Temperature
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
01:26Bacterial Protein Maturation
Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
03:00Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
03:00Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...