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Keratin expression in human tissues and neoplasms.
1Department of Pathology, City of Hope National Medical Center, Duarte, CA 91010, USA.
Histopathology
|May 16, 2002
Summary
Keratin filaments, essential for intermediate filaments (IFs), show distinct expression patterns in human tissues and neoplasms. Understanding these keratin profiles aids in classifying tissues and identifying malignant transformations.
Area of Science:
- Biochemistry
- Cell Biology
- Oncology
Background:
- Keratin filaments are type I and type II intermediate filaments (IFs), with over 20 subtypes.
- Specific keratin subtypes define normal human tissue types.
- Simple epithelia typically express keratins 7, 18, 19, 20, while complex epithelia express keratins 5/6, 10, 14, 15.
Purpose of the Study:
- To review the molecular and cell biology of keratin filaments.
- To focus on the expression patterns of keratin filaments in human epithelial neoplasms.
Main Methods:
- Review of existing literature on keratin filament biology.
- Analysis of keratin expression patterns in various human neoplasms.
Main Results:
- Keratin expression patterns are characteristic of specific normal human tissues.
- Malignant transformation of epithelia generally maintains the keratin profile.
- Keratin filament expression in human epithelial neoplasms is complex and often distinctive.
Conclusions:
- Keratin expression serves as a biomarker for tissue classification.
- Distinct keratin profiles in neoplasms can aid in diagnosis and subclassification.