6533b86efe1ef96bd12ccaba
RESEARCH PRODUCT
Expression of Transketolase-like 1 and Activation of Akt in Grade IV Glioblastomas Compared With Grades II and III Astrocytic Gliomas
Stephanie SommerCarsten HagemannGiles Hamilton VinceRainer WittigImme HaubitzJohannes F. CoyUlrike KämmererHans-ullrich VölkerCamelia-maria MonoranuJelena Stojicsubject
Pathologymedicine.medical_specialtyAstrocytomaGeneral MedicineMetabolismAstrocytomaPentose phosphate pathwayTransketolaseBiologymedicine.diseaseEnzyme assayUp-RegulationEnzyme ActivationGene Expression Regulation NeoplasticBlotmedicinebiology.proteinCancer researchHumansGlycolysisRNA MessengerTransketolaseGlioblastomaProto-Oncogene Proteins c-aktProtein kinase Bdescription
Transketolases link the Embden-Meyerhof pathway to the pentose phosphate pathway. An influence of p-Akt on this metabolism was described. This study was performed to compare the expression of transketolase-like 1 (TKTL1) and p-Akt in glioblastoma multiforme (GBM) and other astrocytic gliomas (AGs, grades II and III). We analyzed 15 GBMs, 15 AGs (grade II), and 3 normal brain samples for TKTL1 expression by semiquantitative reverse transcription–polymerase chain reaction and Western blotting and 23 GBMs, 9 grade III AGs, and 7 grade II AGs immunohistochemically (TKTL1 and p-Akt). On the protein level, TKTL1 was significantly overexpressed in tumors. Immunohistochemically, the tumor grade significantly correlated with expression of TKTL1. Compared with grades II and III AGs, GBMs showed higher expression of TKTL1, more positive tumors, and a higher percentage of positive tumor cells. The percentage of positive cells for TKTL1 and p-Akt was significantly correlated. These observations could lead to additional therapeutic options targeting a specific blockade of TKTL1 enzyme activity.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-06-14 | American Journal of Clinical Pathology |