The information-theory analysis of Michaelis-Menten constants for detection of breast cancer.
BACKGROUND
The Michaelis-Menten constants (K(m) and V(max)) operated by the Information Theory were employed for detection of breast cancer.


METHODS
The rate of enzymatic hydrolysis of fluorescein diacetate (FDA) in live peripheral blood mononuclear cells (PBMC), derived from healthy subjects and breast cancer (BC) patients, was assessed by measuring the fluorescence intensity (FI) in individual cells under incubation with either the mitogen phytohemagglutinin (PHA) or with tumor tissue, as compared to control. The data were processed by the Information Theory to determine the parameters and test conditions, which can best discriminate between the different groups. The normalized mutual information (uncertainty coefficients) was used as the measure of correlation/discrimination.


RESULTS
An estimated general correlation was established between the K(m)/V(max) parameters and the examined patterns in the different bioassays. The information-theoretical analysis revealed the relative diagnostic value of each parameter.


CONCLUSIONS
It was found that K(m) and V(max) as individual parameters show relatively low correlations with the presence or absence of disease, yet in combination often provide a good diagnostic measure. Based on the relative diagnostic values of each parameter, a diagnostic decision making rule was constructed. The diagnostic rule provided correct diagnosis for 37 out of 40 subjects.
Blokh
David
D
The Biophysical Interdisciplinary Jerome Schottenstein Center for Research and Technology of Cellome, Department of Physics, Bar-Ilan University, Ramat Gan 52900, Israel.
Stambler
Ilia
I
Afrimzon
Elena
E
Shafran
Yana
Y
Korech
Eden
E
Sandbank
Judith
J
Orda
Ruben
R
Zurgil
Naomi
N
Deutsch
Mordechai
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001773:Blood Cells; D001943:Breast Neoplasms / Q000097:blood / Q000175:diagnosis*; D003657:Decision Making; D003663:Decision Trees; D005260:Female; D006801:Humans; D007257:Information Theory; D008875:Middle Aged; D008954:Models, Biological