Mammaglobin and maspin transcripts in blood may reflect disease progression and the effect of therapy in breast cancer.

Detection of residual tumor cells in the circulation can provide prognostic as well as therapeutic information and help in identifying patients at high risk for developing metastases. Maspin and mammaglobin are two molecules that are specifically associated with breast cancer. We looked for mammaglobin and maspin transcripts in the peripheral blood of patients with breast cancer and evaluated their utility as a marker of the response to therapy.

Detection of circulating melanoma cells by a two-marker polymerase chain reaction assay in relation to therapy.

Malignant melanoma is one of the most rapidly increasing cancer types, and patients with metastatic disease have a very poor prognosis. Detection of metastatic melanoma cells in circulation may aid the clinician in assessing tumor progression, metastatic potential, and response to therapy. Tyrosinase is a key enzyme in melanin biosynthesis.

P53 codon 72 genotypes in colon cancer. Association with human papillomavirus infection.

It has been reported that the p53Arg homozygous genotype could be a potential genetic risk factor for cancer. In this study we investigated the proportion of p53 codon 72 genotypes in patients with colon cancer and compared to a control population. A region of the p53 gene containing the polymorphic site was amplified by PCR and the genotypes were determined by restriction enzyme digestion.

Telomerase activity in patients with chronic myeloid leukemia and lymphoma.

Telomeres are repeated DNA sequences, positioned at the ends of chromosomes and are essential for the stable maintenance of chromosomes. The telomere length serves as a mitotic clock determining the remaining replicative capacity of the cell. Telomeric sequences are lost during each cell division, leading to a process thought to contribute to senescence and cell death.

BRCA1 and BRCA2 mutations in Turkish breast/ovarian families and young breast cancer patients.

To date, BRCA1 and BRCA2 mutations in breast and/or ovarian patients have not been characterized in the Turkish population. We investigated the presence of BRCA mutations in 53 individuals with a personal and family history of breast and/or ovarian cancer, and 52 individuals with a personal history of breast cancer diagnosed below age 50 without additional family history. We have identified 11 mutations (nine BRCA1 and two BRCA2) using combined techniques involving protein truncation test, direct sequencing and heteroduplex analysis.