title: Differential expression of porcine testis proteins during postnatal development.
abstract: The development of the testes includes changes in cell morphology and endocrine levels that are essential for the maturation of males. A large number of novel proteins are expressed throughout testis development and play important roles in spermatogenesis. Differences in protein expressions during the development of porcine testes have not been systematically studied. The purpose of this study was to investigate differential protein expression in porcine testes during postnatal development. Testes from four pigs each at 1wk, 3mo, and 1yr of age were used for a proteomic analysis. Expression levels of 264 protein spots were quantified using the Melanie 3 software. In total, 108 protein spots showed more than 2-fold differences (P<0.05) among developmental stages, and 90 of them were successfully identified by mass spectrometry. The proteins were sorted based on whether the expression levels increased with age (36.1%), decreased with age (38.0%), or fluctuated among different developmental stages (25.9%). In total, 69 unique gene products were further classified according to their gene ontology annotations. A majority of the proteins are organelle proteins (41%) with the nucleus and mitochondria being the main organelles. About 45% of the proteins have a protein binding domain and are likely involved in protein-protein interactions. Finally, a large proportion of these differentially expressed proteins are involved in cellular (25%) and metabolic (22%) processes. Identifying these differentially expressed proteins should be valuable for exploring developmental biology and the pathology of male reproduction.
authors.affiliation: Department of Animal Science, National Chung Hsing University, Taiwan. syhuang@dragon.nchu.edu.tw
authors.forename: San-Yuan
authors.initials: SY
authors.lastname: Huang
authors.forename: Jyh-Hung
authors.initials: JH
authors.lastname: Lin
authors.forename: Shih-Hua
authors.initials: SH
authors.lastname: Teng
authors.forename: H Sunny
authors.initials: HS
authors.lastname: Sun
authors.forename: Yu-Hui
authors.initials: YH
authors.lastname: Chen
authors.forename: Hsin-Hsin
authors.initials: HH
authors.lastname: Chen
authors.forename: Jun-Yi
authors.initials: JY
authors.lastname: Liao
authors.forename: Meng-Ting
authors.initials: MT
authors.lastname: Chung
authors.forename: Ming-Yu
authors.initials: MY
authors.lastname: Chen
authors.forename: Chin-Kai
authors.initials: CK
authors.lastname: Chuang
authors.forename: En-Chung
authors.initials: EC
authors.lastname: Lin
authors.forename: Mu-Chiou
authors.initials: MC
authors.lastname: Huang
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D016000:Cluster Analysis; D015180:Electrophoresis, Gel, Two-Dimensional; D007150:Immunohistochemistry; D008297:Male; D013058:Mass Spectrometry; D055442:Metabolome; D011506:Proteins / Q000032:analysis* / Q000378:metabolism; D020543:Proteome / Q000032:analysis / Q000378:metabolism; D020539:Sequence Analysis, Protein; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D034421:Sus scrofa / Q000254:growth & development* / Q000378:metabolism*; D013737:Testis / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D011506:Proteins; D020543:Proteome