The clinicopathological and prognostic relevance of pyruvate kinase M2 and pAkt expression in breast cancer.
BACKGROUND
Cancer cell growth has been described to depend on glucose utilization. Activation of Akt and up-regulation of pyruvate kinase M2 (M2-PK) are attributes of tumour glycolysis.


METHODS
In order to evaluate the prognostic relevance of glycolytic markers in breast cancer, the expression of pAkt and M2PK was analysed in 160 tissue samples. The staining results were compared with clinicopathological characteristics and survival data.


RESULTS
Overexpression of pAkt was detected in 58% and of M2PK in 70% of breast cancer samples. Increased pAkt-expression was accompanied with shorter survival time. In contrast, M2PK expression was significantly higher in patients surviving breast cancer for more than 13 years.


CONCLUSIONS
Strong M2PK expression seems to be a favourable prognostic factor and its role in breast cancer progression should be further explored. Our data confirm previous observations of pAkt as a negative prognostic marker.
Benesch
Carina
C
Department of Gynaecology and Obstetrics, University of Wuerzburg, Wuerzburg, Germany.
Schneider
Christine
C
Voelker
Hans-Ullrich
HU
Kapp
Michaela
M
Caffier
Hans
H
Krockenberger
Mathias
M
Dietl
Johannes
J
Kammerer
Ulrike
U
Schmidt
Melanie
M
D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor; D001943:Breast Neoplasms / Q000175:diagnosis / Q000378:metabolism* / Q000401:mortality; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D005947:Glucose / Q000378:metabolism; D006801:Humans; D008875:Middle Aged; D009362:Neoplasm Metastasis; D011379:Prognosis; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism*; D011770:Pyruvate Kinase / Q000378:metabolism*; D011960:Receptors, Estrogen / Q000378:metabolism; D016896:Treatment Outcome
D014408:Biomarkers, Tumor; D011960:Receptors, Estrogen; D011770:Pyruvate Kinase; D051057:Proto-Oncogene Proteins c-akt; D005947:Glucose