title: Proteome analysis of human placentae: pre-eclampsia versus normal pregnancy.
abstract: Although placental proteins play multiple roles in fetal and placental development and in the maintenance of pregnancy, many remain inadequately characterized. In the present study, we comprehensively analyzed these proteins by using a proteomic approach. Samples were denatured with guanidine hydrochloride, which was found to be superior to the commonly used urea for the present purpose, and subjected to 2-dimensional (2D) electrophoresis (2-DE) to obtain placental proteome maps. The identified protein spots (ca. 60% of the total) on the proteome maps included several pregnancy-related proteins (PRPs). Furthermore, a novel 2D immunoblotting (2-DI) analysis of molecules related to pre-eclampsia revealed three immunopositive spots that appeared to correspond to dynactin p-50, a protein related to cell turn-over. The rate of positivity for dynactin p-50-reactive antibodies was significantly (P=0.0024) higher in 26 pre-eclamptic women than in 58 normally pregnant women. These results indicate that dynactin p-50 may be involved in the pathophysiology of pre-eclampsia.
authors.affiliation: Department of Obstetrics and Gynecology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan. s2085@nms.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Mine
authors.forename: A
authors.initials: A
authors.lastname: Katayama
authors.forename: T
authors.initials: T
authors.lastname: Matsumura
authors.forename: T
authors.initials: T
authors.lastname: Nishino
authors.forename: Y
authors.initials: Y
authors.lastname: Kuwabara
authors.forename: G
authors.initials: G
authors.lastname: Ishikawa
authors.forename: T
authors.initials: T
authors.lastname: Murata
authors.forename: R
authors.initials: R
authors.lastname: Sawa
authors.forename: Y
authors.initials: Y
authors.lastname: Otsubo
authors.forename: S
authors.initials: S
authors.lastname: Shin
authors.forename: T
authors.initials: T
authors.lastname: Takeshita
mesh_terms: D000328:Adult; D000906:Antibodies / Q000276:immunology; D000072159:Dynactin Complex; D015180:Electrophoresis, Gel, Two-Dimensional; D005260:Female; D019791:Guanidine / Q000737:chemistry; D006801:Humans; D008869:Microtubule-Associated Proteins / Q000032:analysis* / Q000097:blood; D010920:Placenta / Q000737:chemistry* / Q000378:metabolism; D011225:Pre-Eclampsia / Q000378:metabolism*; D011247:Pregnancy / Q000378:metabolism*; D011489:Protein Denaturation; D020543:Proteome / Q000032:analysis*
chemical_list: D000906:Antibodies; D000072159:Dynactin Complex; D008869:Microtubule-Associated Proteins; D020543:Proteome; D019791:Guanidine