title: Sulfotransferase 1A2*2 is a risk factor for early-onset breast cancer.
abstract: The estrogen-signaling pathway plays an important role in the pathophysiology of breast cancer, and the sulfotransferase 1A (SULT1A) family has been found to be both downstream targets of tamoxifen and a risk factor of breast cancer. We have used PCR-RFLP and direct sequencing methods to determine SULT1A2 polymorphisms in 230 Taiwanese breast cancer patients. The results showed that the frequencies of SULT1A2*1 and SULT1A2*2 occurring were 94.8% and 5.2%, respectively. No SULT1A2*3 allele was found in these patients. In comparison with the frequency of healthy controls (96.0% and 4.0% for SULT1A2*1 and SULT1A2*2, respectively), the allelic frequencies of SULT1A2 polymorphisms in these patients were not statistically significant (p=0.398). However, the SULT1A2*2 allele seems to influence the age of onset among early-onset breast cancer patients (p=0.021, OR=2.74, 95%CI=1.13-6.65).
authors.affiliation: Department of Molecular Medicine, China Medical College Hospital, Taichung, Taiwan.
authors.forename: Ming-Feng
authors.initials: MF
authors.lastname: Hou
authors.forename: Shou-Tung
authors.initials: ST
authors.lastname: Chen
authors.forename: Jui-Chang
authors.initials: JC
authors.lastname: Chen
authors.forename: Kun-Tu
authors.initials: KT
authors.lastname: Yeh
authors.forename: Tai-Ping
authors.initials: TP
authors.lastname: Lee
authors.forename: Chih-Mei
authors.initials: CM
authors.lastname: Chen
authors.forename: Mu-Chin
authors.initials: MC
authors.lastname: Shih
authors.forename: Cheng-Chieh
authors.initials: CC
authors.lastname: Lin
authors.forename: Jan-Gowth
authors.initials: JG
authors.lastname: Chang
mesh_terms: D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D015239:Arylsulfotransferase; D001483:Base Sequence; D001943:Breast Neoplasms / Q000201:enzymology* / Q000235:genetics*; D016022:Case-Control Studies; D004273:DNA, Neoplasm / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D006801:Humans; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D012307:Risk Factors; D015238:Sulfotransferases / Q000235:genetics*; D013624:Taiwan
chemical_list: D004273:DNA, Neoplasm; D015238:Sulfotransferases; D015239:Arylsulfotransferase; C117544:SULT1A1 protein, human; C513290:SULT1A2 protein, human