title: Expression of porcine FSHbeta subunit promoter-driven herpes simplex virus thymidine kinase gene in transgenic rats.
abstract: A transgenic rat was established using the construct of porcine FSHbeta subunit promoter, the -852/+10 bp region, fused to a Herpes simplex virus thymidine kinase (HSV-TK) gene. Integration of the transgene was confirmed by PCR of tail DNA. RT-PCR of total RNAs of the pituitary, gonad, cerebellum, liver, kidney, adrenal gland, prostate, and uterus revealed that FSHbeta was only expressed in the pituitary. Analysis of the expression of reporter gene, HSV-TK, using two specific primer sets revealed that different transcripts were present in the pituitary and testis. The transcript initiated at the transcription initiation site of the porcine FSHbeta gene was detected in the pituitary, and another within the TK gene was found in the testis, indicating ectopic testis-specific expression. Immunohistochemistry of the pituitary glands of the transgenic rats for FSH and HSV-TK demonstrated that the FSH-producing cells also produced HSV-TK. The results indicated that the -852/+10 bp region of the FSHbeta promoter contains an element(s) that determines the tissue-specific expression. We succeeded in producing FSHbeta promoter-driven HSV-TK transgenic rats and were the first time to do so using an animal other than the mouse. The transgenic rats show male infertility that involves abnormal spermatogenesis. We also observed a decrease in the weight of the testis and epididymis, and both motile and living spermatozoa were absent in the epididymis. Consequently, the FSHbeta-HSV-TK transgenic rat will provide a useful model for studies on FSH function and male infertility.
authors.affiliation: Division of Life Science, Graduate School of Agriculture, Meiji University, Tama, Kawasaki, Japan.
authors.forename: Li-yi
authors.initials: LY
authors.lastname: Cai
authors.forename: Takako
authors.initials: T
authors.lastname: Kato
authors.forename: Kazumi
authors.initials: K
authors.lastname: Ito
authors.forename: Michie
authors.initials: M
authors.lastname: Nakayama
authors.forename: Takao
authors.initials: T
authors.lastname: Susa
authors.forename: Satoko
authors.initials: S
authors.lastname: Aikawa
authors.forename: Kei-Ichiro
authors.initials: K
authors.lastname: Maeda
authors.forename: Hiroko
authors.initials: H
authors.lastname: Tsukamura
authors.forename: Akihiko
authors.initials: A
authors.lastname: Ohta
authors.forename: Shun-ichiro
authors.initials: S
authors.lastname: Izumi
authors.forename: Yukio
authors.initials: Y
authors.lastname: Kato
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D005260:Female; D037201:Follicle Stimulating Hormone, beta Subunit / Q000235:genetics* / Q000378:metabolism; D005786:Gene Expression Regulation; D006561:Herpes Simplex / Q000235:genetics*; D007248:Infertility, Male / Q000235:genetics; D008297:Male; D009929:Organ Size / Q000235:genetics; D010902:Pituitary Gland / Q000502:physiology; D011401:Promoter Regions, Genetic / Q000235:genetics*; D051381:Rats; D013081:Sperm Motility; D013091:Spermatogenesis / Q000235:genetics; D013094:Spermatozoa / Q000473:pathology; D013552:Swine / Q000235:genetics; D013737:Testis / Q000473:pathology / Q000502:physiology; D013937:Thymidine Kinase / Q000235:genetics* / Q000378:metabolism
chemical_list: D037201:Follicle Stimulating Hormone, beta Subunit; D013937:Thymidine Kinase