PMID- 12420294 OWN - NLM STAT- MEDLINE DCOM- 20030616 LR - 20071115 IS - 1040-452X (Print) IS - 1040-452X (Linking) VI - 64 IP - 1 DP - 2003 Jan TI - Chromosomal location, structure, and temporal expression of the platelet-activating factor receptor (PAFr) gene in porcine endometrium and embryos relative to estrogen receptor alpha gene expression. PG - 4-12 AB - Although platelet-activating factor receptor (PAFr) gene was well characterized in the human, little was known about it in domestic animals. Porcine PAFr gene was mapped using fluorescence in situ hybridization (FISH). The structure of this gene was investigated using a 5' rapid amplification of cDNA ends (RACE) technique. Temporal expression of PAFr and estrogen receptor alpha genes (ER), and distribution of the PAFr transcripts in porcine endometrial and embryonic tissues on days 0, 10, 12, 14, 16, and 18 were analyzed using DNA competitors and reverse transcription and polymerase chain reaction (RT-PCR). The porcine PAFr gene was mapped to SSC6q26-27. Alternative splicing of primary transcripts of the PAFr gene produced two different transcripts. Transcript 1 was expressed in all tissues and cells, and transcript 2 was detected in all tissues but white blood cells. The temporal expression of the PAFr gene in endometrial (P > 0.05) and embryonic (P < 0.05) tissues of pregnant sows increased from day 10 to 16. The temporal expression of ER genes in endometrial tissues of pregnant sows decreased from day 10 to 18 (P < 0.05). In addition, ER expression was detectable in 20-60% of embryonic tissue samples, which generally decreased. In combination with previously obtained data on PAF and estradiol-17beta (E(2)) concentrations in pregnant uterine luminal fluids (pULF), endometrial and embryonic tissues, the present results indicated that the increasing PAFr transcripts were positively associated with increasing levels of PAF. Both ER transcripts and E(2) found in pULF decreased correspondingly from day 13 to 16. These results indicate that via PAFr, PAF could play a dominant role in peri-implantation development in pigs as compared to E(2). CI - Copyright 2003 Wiley-Liss, Inc. FAU - Yang, Wensheng AU - Yang W AD - Poole Agricultural Center, Department of Animal & Veterinary Sciences, Clemson University, Clemson, South Carolina 29634, USA. FAU - Diehl, John R AU - Diehl JR FAU - Yerle, Martine AU - Yerle M FAU - Ford, J Joe AU - Ford JJ FAU - Christenson, Ronald K AU - Christenson RK FAU - Roudebush, William E AU - Roudebush WE FAU - Plummer, William E AU - Plummer WE LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Mol Reprod Dev JT - Molecular reproduction and development JID - 8903333 RN - 0 (Estrogen Receptor alpha) RN - 0 (Platelet Membrane Glycoproteins) RN - 0 (Protein Isoforms) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Cell Surface) RN - 0 (Receptors, Estrogen) RN - 0 (Receptors, G-Protein-Coupled) RN - 0 (platelet activating factor receptor) SB - IM MH - Animals MH - *Chromosome Mapping MH - Embryo, Mammalian/*metabolism MH - Endometrium/*metabolism MH - Estrogen Receptor alpha MH - Female MH - In Situ Hybridization, Fluorescence MH - Platelet Membrane Glycoproteins/biosynthesis/chemistry/*genetics MH - Pregnancy MH - Protein Isoforms MH - RNA, Messenger MH - Receptors, Cell Surface/biosynthesis/chemistry/*genetics MH - Receptors, Estrogen/biosynthesis/*genetics MH - *Receptors, G-Protein-Coupled MH - Sequence Analysis, DNA MH - Swine EDAT- 2002/11/07 04:00 MHDA- 2003/06/17 05:00 CRDT- 2002/11/07 04:00 PHST- 2002/11/07 04:00 [pubmed] PHST- 2003/06/17 05:00 [medline] PHST- 2002/11/07 04:00 [entrez] AID - 10.1002/mrd.10217 [doi] PST - ppublish SO - Mol Reprod Dev. 2003 Jan;64(1):4-12. doi: 10.1002/mrd.10217.