Inventors:
Yoshinori Kohwi - San Diego CA
Assignee:
The Burnham Institute - La Jolla CA
International Classification:
C12Q 168
G01N 33574
G01N 33566
G01N 3348
Abstract:
The present invention provides a substantially purified protein, p114-MBP, which has an apparent molecular mass of about 114 kDa and specifically associates with a matrix attachment region DNA sequence context (MAR). p114-MBP is characterized, in part, by having substantial MAR binding activity in malignant tumor tissue but not in a corresponding non-cancerous tissue. The invention also provides a method of detecting the presence of malignant tumor tissue in a cell sample suspected of containing malignant tumor tissue by contacting the sample with a MAR, under conditions that allow the specific association of the MAR with p114-MBP, and detecting such specific association, which indicates the presence of malignant tumor tissue in the cell sample. The present invention further provides a method of diagnosing cancer in a subject suspected of having cancer by contacting a cell sample obtained from a subject with a MAR under conditions that allow the specific association of the MAR with p114-MBP and detecting such specific association, which indicates that malignant tumor tissue was present in the sample and, therefore, is diagnostic of cancer in the subject. The invention also provides a method of determining the prognosis of a cancer patient.