J Korean Surg Soc.  2001 Feb;60(2):136-140.

The Expression of High Mobility Group I (Y) Proteins in Human Breast Cancer

• Ryu JW

Abstract

PURPOSE: The precise mechanisms of tumorigenesis of breast cancer remains unknown in spite of major efforts. Recent studies have shown that High Mobility Group I (Y) Proteins [HMGI(Y)] have an important role in the regulation of chromatin structure and function, and that HMGI(Y) protein expression is generally correlated with a malignant phenotype. This study was undertaken to define the relationship of the HMGI(Y) protein expression between malignant breast tissue and non-malignant breast tissue in human, and clinico- pathologic findings were reviewed for this purpose.
METHODS
Using Reverse Transcription-Polymerase Chain Reaction (RT-PCR) for HMGI(Y) with beta-actin, this study demonstrated the expression of HMGI(Y). The p53, ER, and PR. were defined by immunohistochemical staining.
RESULTS
The HMGI(Y) expression was increased in the malignant tissue (90%), than in benign (76.9%) or normal (65%) tissue (p=0.031). As for the invasive ductal cancers, there was no difference between the HMGI(Y) expression and histopathologic parameters.
CONCLUSION
These results suggest that the HMGI(Y) expression may be of little pathogenetic prognostic importance in human breast cancer.

Keyword

HMGI(Y); Breast cancer

MeSH Terms

Actins
Breast Neoplasms*
Breast*
Carcinogenesis
Chromatin
Humans*
Phenotype
Actins
Chromatin