Hum. Reprod. Advance Access originally published online on December 2, 2004
Human Reproduction 2005 20(2):476-483; doi:10.1093/humrep/deh498
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Identification of genes expressed in primate primordial oocytes
1 DEB, NICHD, 3 Laboratory of Pathology, NCI, 4 Laboratory of Genetics, NIMH, NIH, Bethesda, MD, USA, 2 Department Obstetric and Gynecology, University of Los Andes and 5 Laboratory of Biochemistry, University of Santiago, Chile
6 To whom correspondence should be addressed at: Building 10/10N262, 10 Center Dr, NIH, Bethesda, MD 20892, USA. Email: bondyc{at}mail.nih.gov
BACKGROUND: The factors involved in oocyte survival and transition from quiescence to the growing phenotype remain unknown. Herein we report genes that are differentially expressed in the primordial oocyte revealed by DNA arrays. METHODS: Primordial oocytes were captured selectively in rhesus monkey ovary sections using laser capture microdissection. The RNA was extracted and amplified in two rounds by T7-based linear RNA amplification, fluorescence labelled and then hybridized to human cDNA arrays containing 7680 elements. RNA from human placenta served as a reference sample. RESULTS: Ninety-five genes were found to be consistently expressed at a higher level in primordial oocytes. Expression of several of these genes in the oocyte has been reported before, e.g. deleted in azoospermia (DAZ), prohibitin and transglutaminase 2. Oocyte expression of several novel transcripts revealed on array hybridization, such as gene 33, ubiquitin-conjugating enzyme E2A, G1 to S phase transition 1, growth arrest and DNA damage-inducible (GADD), and dendritic cell-derived ubiquitin-like protein (DC-UbP) was confirmed by in situ hybridization. Some array-identified gene products [integrin 
3, 
-tubulin, regulatory telomere elongation protein (RAP1) and cellular repressor of EIA-stimulated genes (CREG protein)] were detected in human oocytes by immunofluorescence. Bioinformatic analysis of the oocyte-enriched transcripts reveals a functional profile summarized as follows: cell cycle (14%); transporter (13%); signal transduction (10%); cytoskeletal (7%); transcription factor (5%); immune response (5%); apoptosis-related (5%); RNA processing (5%); and the remainder of miscellaneous categories. CONCLUSIONS: These observations may contribute to the elucidation of molecular pathways involved in oocyte survival and maturation.
Key words: embryogenesis/fertility/folliculogenesis/microarray/oogenesis
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  P. A. Fowler, S. Flannigan, A. Mathers, K. Gillanders, R. G. Lea, M. J. Wood, A. Maheshwari, S. Bhattacharya, E. S. R. Collie-Duguid, P. J. Baker, et al. Gene Expression Analysis of Human Fetal Ovarian Primordial Follicle Formation J. Clin. Endocrinol. Metab., April 1, 2009; 94(4): 1427 - 1435. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. A McLaughlin and S. C McIver Awakening the oocyte: controlling primordial follicle development Reproduction, January 1, 2009; 137(1): 1 - 11. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Basu, R. Desai, J Balaji, R. Chaerkady, V Sriram, S. Maiti, and M. M Panicker Serotonin in pre-implantation mouse embryos is localized to the mitochondria and can modulate mitochondrial potential Reproduction, May 1, 2008; 135(5): 657 - 669. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Vallee, K. Aiba, Y. Piao, M.-F. Palin, M. S H Ko, and M.-A. Sirard Comparative analysis of oocyte transcript profiles reveals a high degree of conservation among species Reproduction, April 1, 2008; 135(4): 439 - 448. [Abstract] [Full Text] [PDF]
|
|