title: Altered mRNA expression patterns in bovine blastocysts after fertilisation in vitro using flow-cytometrically sex-sorted sperm.
abstract: Sperm-sexing has been used to produce embryos and offspring of a pre-determined sex in a number of species. However, the fertility of sex-sorted sperm is reduced and the full effects of sperm-sexing remain to be elucidated. The purpose of the present study was to investigate the potential effects of sex-sorted sperm on mRNA expression patterns of developmentally important genes employing in vitro produced bovine embryos. Bovine embryos were produced in vitro with unsorted and sex-sorted sperm and mRNA expression patterns were determined for glucose-3 transporter (Glut-3), glucose-6-phosphate dehydrogenase (G6PD), X-inactive specific transcript (X-ist) and Heat shock protein 70.1 (Hsp) using semi-quantitative endpoint reverse transcriptase-PCR in male and female, day-7 and 8 embryos. The relative abundance (RA) of Glut-3 was higher for day-7 male than female embryos, and day-7 embryos derived from unsorted compared with sex-sorted sperm. The RA of G6PD was higher for embryos derived from unsorted than sex-sorted sperm, and for day-8 female compared with male embryos. The RA of Xist was higher for female than male embryos, and for day-7 female embryos derived from unsorted than sex-sorted sperm. Hsp RA was higher for female compared with male embryos, was similar for day-7 and 8 embryos, and unsorted and sex-sorted sperm derived embryos. These results demonstrate differential expression of developmentally important genes between male and female embryos, and embryos derived from unsorted and sex-sorted sperm.
authors.affiliation: Centre for Advanced Technologies in Animal Genetics and Reproduction, Faculty of Veterinary Science, The University of Sydney, Australia. kmorton@vetsci.usyd.edu.au
authors.forename: K M
authors.initials: KM
authors.lastname: Morton
authors.forename: D
authors.initials: D
authors.lastname: Herrmann
authors.forename: B
authors.initials: B
authors.lastname: Sieg
authors.forename: C
authors.initials: C
authors.lastname: Struckmann
authors.forename: W M C
authors.initials: WM
authors.lastname: Maxwell
authors.forename: D
authors.initials: D
authors.lastname: Rath
authors.forename: G
authors.initials: G
authors.lastname: Evans
authors.forename: A
authors.initials: A
authors.lastname: Lucas-Hahn
authors.forename: H
authors.initials: H
authors.lastname: Niemann
authors.forename: C
authors.initials: C
authors.lastname: Wrenzycki
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000166:cytology / Q000502:physiology*; D002417:Cattle; D002469:Cell Separation; D005260:Female; D005307:Fertilization in Vitro; D005434:Flow Cytometry; D018507:Gene Expression Regulation, Developmental; D008297:Male; D012333:RNA, Messenger / Q000378:metabolism*; D013094:Spermatozoa / Q000166:cytology / Q000502:physiology
chemical_list: D012333:RNA, Messenger