BACKGROUND: Prostaglandins (PGs) within the periovulatory follicle are essential for various female reproductive functions such as follicular development and maturation. In animal models, granulosa cells express the PG synthesizing enzyme cyclooxygenase-2 (COX-2) and the PG inactivating enzyme 15-hydroxyprostaglandin dehydrogenase (15-PGDH). First references suggest a correlation between vitamin D and prostaglandin metabolism through the impact of 1,25(OH)2D3 (calcitriol) on the expression of COX-2 and 15-PGDH. MATERIALS AND METHODS: The expression of COX-2, 15-PGDH and the vitamin D receptor (VDR) in human granulosa cells (COV434, hGC and HGL5), which were originally isolated from different stages of follicular maturation, was determined by real-time PCR (RT-PCR) and Western blot analysis. RESULTS: A positive correlation of COX-2 and VDR protein was found in the COV434 and HGL5 cells and an inverse correlation of 15-PGDH and VDR protein levels in all the investigated cell types. CONCLUSION: There may be a link between VDR, associated target genes and prostaglandin metabolism in human follicular maturation and luteolysis.
BACKGROUND:Prostaglandins (PGs) within the periovulatory follicle are essential for various female reproductive functions such as follicular development and maturation. In animal models, granulosa cells express the PG synthesizing enzyme cyclooxygenase-2 (COX-2) and the PG inactivating enzyme 15-hydroxyprostaglandin dehydrogenase (15-PGDH). First references suggest a correlation between vitamin D and prostaglandin metabolism through the impact of 1,25(OH)2D3 (calcitriol) on the expression of COX-2 and 15-PGDH. MATERIALS AND METHODS: The expression of COX-2, 15-PGDH and the vitamin D receptor (VDR) in human granulosa cells (COV434, hGC and HGL5), which were originally isolated from different stages of follicular maturation, was determined by real-time PCR (RT-PCR) and Western blot analysis. RESULTS: A positive correlation of COX-2 and VDR protein was found in the COV434 and HGL5 cells and an inverse correlation of 15-PGDH and VDR protein levels in all the investigated cell types. CONCLUSION: There may be a link between VDR, associated target genes and prostaglandin metabolism in human follicular maturation and luteolysis.
Authors: Nohra Chalouhi; Pascal Jabbour; Mario Zanaty; Robert M Starke; James Torner; Daichi Nakagawa; David M Hasan Journal: J Am Heart Assoc Date: 2017-10-17 Impact factor: 5.501
Authors: Jing Xu; Maralee S Lawson; Fuhua Xu; Yongrui Du; Olena Y Tkachenko; Cecily V Bishop; Lucas Pejovic-Nezhat; David B Seifer; Jon D Hennebold Journal: Front Physiol Date: 2018-11-14 Impact factor: 4.566