title: Polymorphisms of glutathione S-transferase π 1 and toll-like receptors 2 and 9: Association with breast cancer susceptibility.
abstract: Polymorphisms in antioxidant enzymes and innate immune receptors have been implicated in the development of various types of cancer. The present study aimed to investigate whether polymorphisms of glutathione S-transferase π 1 (GSTP1) and toll-like receptors (TLRs) 2 and 9 are associated with susceptibility to breast cancer among females. The study was conducted on 72 Egyptian female patients with breast cancer, along with 100 healthy volunteers. Polymorphisms of GSTP1 (codon 105 Ile/Val) and TLR9 rs187084 (1237T/C) genes were assessed by polymerase chain reaction (PCR)-restriction fragment length polymorphism, while the -196 to -174 deletion/insertion (del/ins) polymorphism of TLR2 was detected by PCR. The results indicated a decrease in GSTP1 Val allele frequency in breast cancer patients compared with healthy controls, at rates of 22.9 vs. 32.5%, respectively. In addition, the breast cancer group demonstrated a decreased TLR9 C allele frequency compared with the control group, at rates of 36.1 vs. 51.5%, respectively (P=0.0047). A non-significant difference was detected in the frequency of the TLR2 -196 to -174 del allele in breast cancer patients when compared to normal controls. In conclusion, these results suggested that the GSTP1 Val and TLR9 1237C alleles, but not TLR2 -196 to -174 del, are likely to be associated with breast cancer development among females.
authors.affiliation: Department of Clinical Pathology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Mohammad F
authors.initials: MF
authors.lastname: Al-Harras
authors.affiliation: Department of Biochemistry, Faculty of Pharmacy, Damanhour University, Damanhour 71515, Egypt.
authors.forename: Maha E
authors.initials: ME
authors.lastname: Houssen
authors.affiliation: Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Mohamed E
authors.initials: ME
authors.lastname: Shaker
authors.affiliation: Department of Oncology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Kamel
authors.initials: K
authors.lastname: Farag
authors.affiliation: Surgical Oncology and Breast Surgery, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Omar
authors.initials: O
authors.lastname: Farouk
authors.affiliation: Department of Medical Biochemistry, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Rehan
authors.initials: R
authors.lastname: Monir
authors.affiliation: Department of Medical Microbiology and Immunology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Rasha
authors.initials: R
authors.lastname: El-Mahdy
authors.affiliation: Department of Clinical Pathology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Ekbal M
authors.initials: EM
authors.lastname: Abo-Hashem
keywords: breast cancer; glutathione S-transferase π 1; polymorphisms; toll-like receptor 2; toll-like receptor 9