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Series GSE8978 Query DataSets for GSE8978
Status Public on May 19, 2008
Title Expression profile of stages of seminiferous tubules, purifed germ cells and sertoli cells
Organism Rattus norvegicus
Experiment type Expression profiling by array
Summary Mammalian spermatogenesis is a complex biological process that occurs within a highly organized tissue, the seminiferous epithelium. The coordinated maturation of spermatogonia, spermatocytes and spermatids suggests the existence of precise programs of gene expression in these cells as well as in their neighboring somatic Sertoli cells. The objective of this study was to elucidate genes encoding the proteins that execute these programs. Rat seminiferous tubules at stages I, II-III, IV-V, VI, VIIa,b, VIIc,d, VIII, IX-XI, XII, XIII-XIV of the cycle were isolated by microdissection and Sertoli cells, spermatogonia plus early spermatocytes, pachytene spermatocytes and spermatids were purified from enzymatically-dispersed testes. Microarray analysis using Rat Genome 230 2.0 arrays identified a total of 16,971 probe sets that recognized transcripts. A comparison with the transcriptome of other tissues identified 398 testis-specific probe sets, which therefore are potential targets for the development of new contraceptives. Sequential waves of cell and stage-specific gene expression are associated with progression of germ cells through the stages of the cycle of the seminiferous epithelium and 1612 probe sets recognized transcripts whose expressions varied at least 4-fold across the stages of the cycle. Pathway analyses reveal that entire biological processes are regulated cyclically in testicular cells. Important among these are cell cycle and DNA repair. Thus, stage-specific gene expression is a widespread and fundamental characteristic of spermatogenic cells and Sertoli cells.
Keywords: cell-type comparison
 
Overall design Seminiferous tubules at the following stages or groups of stages were isolated by transillumination-assisted microdissection: I, II-III, IV-V, VI, VIIa,b, VIIc,d, VIII, IX-XI, XII, XIII-XIV. Twenty-five segments of tubules, 2 m in length, were collected at each stage or group of stages from each rat. Tubules from two separate animals were pooled to form one sample from each stage or groups of stages. A total of 5 independent samples per stage or groups of stages were analyzed. Mature Sertoli cells were isolated to about 85% purity (n=4). Three groups of germ cells were isolated by centrifugal elutriation from enzyme-dispersed testes: round spermatids (n=4), pachytene spermatocytes (n=4) and spermatogonia plus early spermatocytes (n=3) . Purity of these cells has been shown to vary between 85% to 95%
 
Contributor(s) Jelinsky SA, Johston DS, Wright WW
Citation(s) 18544648
Submission date Sep 06, 2007
Last update date Jul 31, 2017
Contact name Scott Jelinsky
E-mail(s) Scott.Jelinsky@pfizer.com
Phone 617-674-7272
Organization name Pfizer
Department Inflammation and Immunology
Lab Computational Precision Medicine
Street address 610 Main Street
City Cambridge
State/province MA
ZIP/Postal code 02139
Country USA
 
Platforms (1)
GPL1355 [Rat230_2] Affymetrix Rat Genome 230 2.0 Array
Samples (69)
GSM227536 Seminiferous Tubules Stage I Replica_4
GSM227537 Seminiferous Tubules Stage I Replica_3
GSM227538 Seminiferous Tubules Stage I Replica_5
Relations
BioProject PRJNA102437

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Supplementary file Size Download File type/resource
GSE8978_RAW.tar 296.8 Mb (http)(custom) TAR (of CEL)
Processed data included within Sample table
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