Mutation analysis of gonadotropin receptor and G protein genes in various types of human ovarian tumors.
The heterotrimeric guanine-nucleotide-binding proteins (G proteins) and G protein-coupled hormone receptors including gonadotropin receptors have been suggested to play a role in ovarian tumorigenesis. However, no functional significance of gonadotropin receptors and G proteins in this process has been demonstrated. To investigate this issue, we examined point mutations in these genes in various types of ovarian tumors by polymerase chain reaction-single strand conformation polymorphism analysis and direct sequencing. Among 37 tumors (20 epitherial, 8 sex cord-stromal, and 9 germ cell tumors) and 5 carcinoma cell lines examined, no mutational sequence of G protein-interaction domains of luteinizing hormone receptor and follicle-stimulating hormone receptor, or "hot spots" of the alpha subunit of adenylyl cyclase-stimulating G protein and -inhibitory G protein was observed. Although this analysis was performed on only a limited number of tumors and cell lines, and on limited gene loci, the results suggest that mutational activation in gonadotropin receptors and G proteins is not crucial for ovarian tumorigenesis.
Ichikawa
Y
Y
Department of Biochemistry and Molecular Oncology, Institute of Basic Medical Sciences, University of Tsukuba, Ibaraki.
Yoshida
S
S
Suzuki
H
H
Nishida
M
M
Tsunoda
H
H
Kubo
T
T
Miwa
M
M
Uchida
K
K
D005260:Female; D019204:GTP-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D010051:Ovarian Neoplasms / Q000235:genetics* / Q000378:metabolism; D017354:Point Mutation; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D011962:Receptors, FSH / Q000235:genetics* / Q000378:metabolism; D011974:Receptors, LH / Q000235:genetics* / Q000378:metabolism; D015398:Signal Transduction; D014407:Tumor Cells, Cultured
D011962:Receptors, FSH; D011974:Receptors, LH; D019204:GTP-Binding Proteins