Document Detail

Premalignant lesions of the upper aerodigestive tract: biomarkers of genetic alterations, proliferation, and differentiation.
MedLine Citation:
PMID:  8412193     Owner:  NLM     Status:  MEDLINE    
The normal distribution of cell division in squamous mucosa is in the basal or adjacent suprabasal cell layers. Migration of cells toward the epithelial surface results in cell differentiation, most often expressed by high molecular weight keratin intermediate filaments and components of the cornified envelope, including "involucrin." These latter expressions of terminal differentiation are common in keratinizing dysplasia and invasive squamous cell carcinomas. However, they are less common in the non-keratinizing dysplasias, which fail to express evidence of epithelial maturation. Cell proliferation occurs in or near the basal layer in normal or reactive/reversible hyperplasias. In dysplasia (both keratinizing and non-keratinizing), cell proliferation is observed at all levels of the epithelium. Concomitant with these abnormalities in proliferation and differentiation are nuclear changes characterized by large hyperchromatic nuclei. The enlarged nuclei reflect increased DNA content, as documented by flow cytometry and image analysis techniques. DNA aneuploidy represents a spectrum of genomic alterations reflecting steps toward the progression to invasive carcinoma, which for the most part, have not yet been identified.
J D Crissman; D W Visscher; F H Sarkar
Related Documents :
6090303 - Metaplasias and neoplasias of müllerian epithelium.
2408913 - Establishment and characterization of a new clonal strain derived from human benign gas...
23286903 - Iron, glucose and intrinsic factors alter sphingolipid composition as yeast cells enter...
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Journal of cellular biochemistry. Supplement     Volume:  17F     ISSN:  0733-1959     ISO Abbreviation:  J. Cell. Biochem. Suppl.     Publication Date:  1993  
Date Detail:
Created Date:  1993-11-16     Completed Date:  1993-11-16     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  8207539     Medline TA:  J Cell Biochem Suppl     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  192-8     Citation Subset:  IM    
Department of Pathology, Harper Hospital, Detroit, MI.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cell Division
DNA, Neoplasm / genetics
Digestive System / pathology*
Precancerous Conditions / pathology*
Respiratory System / pathology*
Tumor Markers, Biological
Reg. No./Substance:
0/DNA, Neoplasm; 0/Tumor Markers, Biological

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  TGF-alpha and EGFR in head and neck cancer.
Next Document:  Tissue autofluorescence as an intermediate endpoint in cancer chemoprevention trials.