The current study aimed at evaluating the associa-tion between GSTM1 null/present, GSTT1 null/present, and GSTP1 IIe105Val polymorphisms and clinical response to chemotherapy and treatment outcome of breast cancers patients. Genotyping of GSTP1 rs1695, GSTT1 deletion, and GSTM1 deletion was performed by Polymerase Chain Reaction Restriction Fragment Length Polymor-phism (PCR-RFLP) assay. We fou...

Pi-class glutathione-S-transferase (GSTP1) located on chromosome 11q13 encodes a phase II metabolic enzyme that detoxifies reactive electrophilic intermediates. GSTP1 plays an important role in protecting cells from cytotoxic and carcinogenic agents and is expressed in normal tissues at variable levels in different cell types. Altered GSTP1 activity and expression have been reported in many tum...

A recent study (Nusrat, A., Chen, J. A., Foley, C. S., Liang, T. W., Tom, J., Cromwell, M., Quan, C., and Mrsny, R. J. (2000) J. Biol. Chem. 275, 29816-29822) suggested that phosphatidylinositol 3-kinase (PI 3-kinase) may interact with occludin; however, there exists no evidence of direct interaction of PI 3-kinase with the tight junctions. Activation of PI 3-kinase by oxidative stress and its ...

BACKGROUND Glutathione (GSH) is one of the most important agents of the antioxidant defense system of the cell because, in conjunction with the enzymes glutathione peroxidase (GSH-Px) and glutathione S transferase pi (GSTpi), it plays a central role in the detoxification and biotransformation of chemotherapeutic drugs. This study evaluated the expression of GSH and the GSH-Px and GSTpi enzymes ...

An anionic glutathione S-transferase was purified from bovine ciliary body by DEAE-agarose chromatography and affinity chromatography on GSH-agarose and Orange A. The enzyme accounts for about 25% of total soluble glutathione S-transferase activity of the tissue. The purified enzyme has a molecular mass of about 50,000 Da and is composed of two identical subunits of about 25,000 Da. The enzyme ...

Glutathione-S-transferases (GSTs) are active in the detoxification of wide variety of endogenous or exogenous carcinogens and genetic polymorphisms of CYP2E1 and GSTP1 genes have been studied extensively to evaluate the relative risk of various cancers. In the present study, we examined associations with CYP2E1 and GSTP1 gene polymorphisms in sporadic bladder cancers from North Indian patients....

The main linear epitopes of pi-glutathione transferase (pi-GST, EC 2.5.1.18), an enzyme related to cancer progression in a restricted number of tumours, were identified by testing in ELISA the reactivities of polyclonal anti-pi-GST rabbit sera against a panel of 51 overlapping decapeptides, covering the whole 216-residue sequence of the protein. Several major reactivity peaks were detected, eac...

PURPOSE To evaluate the potential association between the GSTP1 genotype and the development of breast cancer, a hospital based case-control study was conducted in South Korea. MATERIALS AND METGODS: The study population consisted of 171 histologically confirmed incidents of breast cancer cases, and 171 age-matched controls with no present, or previous, history of cancer. A PCR method was used ...