Differential gene expression in human granulosa cells from recombinant FSH versus human menopausal gonadotropin ovarian stimulation protocols.
BACKGROUND
The study was designed to test the hypothesis that granulosa cell (GC) gene expression response differs between recombinant FSH and human menopausal gonadotropin (hMG) stimulation regimens.


METHODS
Females < 35 years-old undergoing IVF for tubal or male factor infertility were prospectively randomized to one of two stimulation protocols, GnRH agonist long protocol plus individualized dosages of (1) recombinant (r)FSH (Gonal-F) or (2) purified human menopausal gonadotropin (hMG; Menopur). Oocytes were retrieved 35 h post-hCG, and GC were collected. Total RNA was extracted from each GC sample, biotinylated cRNA was synthesized, and each sample was run on Human Genome Bioarrays (Applied Microarrays). Unnamed genes and genes with <2-fold difference in expression were excluded.


RESULTS
After exclusions, 1736 genes exhibited differential expression between groups. Over 400 were categorized as signal transduction genes, approximately 180 as transcriptional regulators, and approximately 175 as enzymes/metabolic genes. Expression of selected genes was confirmed by RT-PCR. Differentially expressed genes included A kinase anchor protein 11 (AKAP11), bone morphogenetic protein receptor II (BMPR2), epidermal growth factor (EGF), insulin-like growth factor binding protein (IGFBP)-4, IGFBP-5, and hypoxia-inducible factor (HIF)-1 alpha.


CONCLUSIONS
Results suggest that major differences exist in the mechanism by which pure FSH alone versus FSH/LH regulate gene expression in preovulatory GC that could impact oocyte maturity and developmental competence.
Department of Obstetrics & Gynecology, Sanford School of Medicine of the University of South Dakota, Sioux Falls SD, USA. jbrannia@usd.edu
John
J
Brannian
Kathleen
K
Eyster
Breanne A
BA
Mueller
Mandi G
MG
Bietz
Keith
K
Hansen
D000328:Adult; D005260:Female; D005640:Follicle Stimulating Hormone / Q000494:pharmacology* / Q000627:therapeutic use; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000187:drug effects; D006107:Granulosa Cells / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D007246:Infertility / Q000628:therapy; D008297:Male; D008596:Menotropins / Q000494:pharmacology* / Q000627:therapeutic use; D020411:Oligonucleotide Array Sequence Analysis; D010062:Ovulation Induction / Q000379:methods*; D011994:Recombinant Proteins / Q000494:pharmacology / Q000627:therapeutic use; D055815:Young Adult
D011994:Recombinant Proteins; D008596:Menotropins; D005640:Follicle Stimulating Hormone