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Expression of Messenger RNA for Prostaglandin E Receptor Subtypes EP4/EP2 and Cyclooxygenase Isozymes in Mouse Periovulatory Follicles and Oviducts During Superovulation1
- Source :
- Biology of Reproduction. 68:804-811
- Publication Year :
- 2003
- Publisher :
- Oxford University Press (OUP), 2003.
-
Abstract
- Prostaglandin (PG) E 2 is synthesized from arachidonic acid by cyclooxygenase (COX) and acts as a regulator in ovulation and fertilization reactions. We present the temporal and regional expression patterns of mRNAs for the two Gs-coupled PGE receptors, EP2 and EP4, and for COX-1 and COX-2 in mouse periovulatory follicles and oviducts during superovulation. Analysis using reverse transcription polymerase chain reaction revealed that the mouse ovaries express a significant amount of EP4 mRNA in addition to EP2 mRNA during superovulation. In situ hybridization results revealed that the signals for EP4 mRNA were localized mostly to oocytes in the preantral follicles. Three hours after hCG injection, the signals for EP4 and EP2 mRNA were present in both granulosa and cumulus cells. However, 9 h after hCG injection, just before ovulation, the signals for EP4 mRNA were still detectable in both cell types, whereas those for EP2 mRNA were found only in cumulus cells. COX-2 mRNA expression was present in both granulosa and cumulus cells at 3 h but was present only in cumulus cells at 9 h. COX-1 mRNA expression was not found in granulosa cells at 3 h but was found in these cells at 9 h. In the oviduct, the expression of EP4 and COX-1 mRNA was localized to epithelial cells, whereas expression of EP2 mRNA was localized to the smooth muscle layer. The tightly regulated expression of both EP2 and EP4 in the preovulatory follicles may reflect the essential role of PGE 2 in the ovulation process. cumulus cells, granulosa cells, ovary, oviduct, ovulation
- Subjects :
- endocrine system
medicine.medical_specialty
Messenger RNA
urogenital system
media_common.quotation_subject
Prostaglandin E2 receptor
medicine.medical_treatment
Ovary
Cell Biology
General Medicine
Biology
Andrology
medicine.anatomical_structure
Endocrinology
Reproductive Medicine
Internal medicine
Gene expression
medicine
Oviduct
lipids (amino acids, peptides, and proteins)
Ovarian follicle
Ovulation
media_common
Prostaglandin E
Subjects
Details
- ISSN :
- 15297268 and 00063363
- Volume :
- 68
- Database :
- OpenAIRE
- Journal :
- Biology of Reproduction
- Accession number :
- edsair.doi...........d6dc0ba5518de0985e4d0843173bf718