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Sakatani M, Kubota K, Haga S, Miwa M. Association between prepartum vaginal temperature changes and placenta expulsion time in Holstein dairy cattle. J Reprod Dev 2024; 70:272-278. [PMID: 38945853 DOI: 10.1262/jrd.2024-012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024] Open
Abstract
Retained placenta (RP) adversely affects postpartum productivity and reproduction in dairy cattle. Thus, methods to predict the occurrence of RP before calving would be desirable. Herein, we assessed whether vaginal temperature measurements (which have already been applied to detect calving) could be used to predict the occurrence of RP in cattle. A vaginal temperature recording device was inserted into the vagina of 49 pregnant Holstein-Friesian heifers (n = 16) and cows (n = 33); this device recorded the vaginal temperature every 5 min until the device dropped out at calving. Serum was collected 10 days before the expected calving date. The time points of calving and placental expulsion were identified via video recordings. We further calculated calving duration (temperature decrease to calving) and placenta expulsion time (PE time = calving to placenta expulsion). The PE times were divided into four categories (0-4 h, 4-8 h, 8-12 h, and RP at >12 h), while subsequent analysis revealed that an extension of the PE time dependent on the shortening of the calving duration (P < 0.05). The vaginal temperature patterns also differed in a PE time-dependent manner, and cows with RP did not show any re-elevation of vaginal temperature. Serum analyses indicated an energy deficiency in RP cattle. These results suggest that RP may be detected early as a specific change in the vaginal temperature associated with reproductive hormone secretion.
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Affiliation(s)
- Miki Sakatani
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tochigi 329-2793, Japan
| | - Kaiyu Kubota
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tochigi 329-2793, Japan
- Present: Core Technology Research Headquarters, NARO, Ibaraki 305-8517, Japan
| | - Satoshi Haga
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tochigi 329-2793, Japan
- Present: Faculty of Agriculture, Graduate School of Agriculture Science, Tohoku University, Miyagi 980-8572, Japan
| | - Masafumi Miwa
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tochigi 329-2793, Japan
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Jungmann C, Dyhrberg Haubuff S, Packeiser EM, Körber H, Reichler IM, Balogh O, Mazzuoli-Weber G, Goericke-Pesch S. Insights into the role of PGF2α in canine periparturient myometrium. Front Physiol 2024; 15:1392080. [PMID: 38863475 PMCID: PMC11165301 DOI: 10.3389/fphys.2024.1392080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 04/26/2024] [Indexed: 06/13/2024] Open
Abstract
Parturition in dogs is subjected to complex hormonal regulation, with the involvement of prostaglandin F2α (PGF2α) still not fully understood. To investigate uterine inertia (UI), the most prevalent maternal reason for dystocia in the bitch, a better understanding of undisturbed uterine, especially myometrial function, is crucial. Our aim was to gain deeper insights into the role of PGF2α in the canine parturient myometrium. Uterine biopsies were obtained during medically indicated cesarean sections. To test for stimulatory effects of PGF2α in vitro, circular and longitudinal myometrial layer tissue strips were challenged with 50 pM, 0.5 µM, and 50 µM PGF2α. Prostaglandin-endoperoxide synthase 2 (PTGS2) and PGF2α-receptor (PTGFR) mRNA expressions were compared between primary UI (PUI) and obstructive dystocia (OD) samples in isolated parturient myometrium. PTGFR protein expression was assessed in full thickness uterine samples. PGF2α concentrations were analyzed in canine interplacental tissue around term. In the organ bath, the contractile response to PGF2α was limited to the circular layer at the highest dosage. Correspondingly, PTGFR immunohistochemical staining was significantly stronger in the circular layer (p ≤ 0.01). PTGS2 gene expression did not differ between PUI and OD, whereas PTGFR gene expression could not be quantified. Local uterine PGF2α concentrations correlated negatively with serum P4 levels and were the highest during prepartum luteolysis while being significantly lower in PUI. Conclusively, despite the significant increase in local PGF2α concentrations at birth, confirming the interplacental tissue as a production site, our results suggest that PGF2α might affect uterine contractility during labor, mainly indirectly.
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Affiliation(s)
- Carolin Jungmann
- Unit for Reproductive Medicine—Clinic for Small Animals, University for Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Signe Dyhrberg Haubuff
- Section for Veterinary Reproduction and Obstetrics, Department of Clinical Veterinary Sciences, University of Copenhagen, Taastrup, Denmark
| | - Eva-Maria Packeiser
- Unit for Reproductive Medicine—Clinic for Small Animals, University for Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Hanna Körber
- Unit for Reproductive Medicine—Clinic for Small Animals, University for Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Iris Margaret Reichler
- Clinic of Reproductive Medicine, University of Zurich Vetsuisse Faculty, Zurich, Switzerland
| | - Orsolya Balogh
- Clinic of Reproductive Medicine, University of Zurich Vetsuisse Faculty, Zurich, Switzerland
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
| | - Gemma Mazzuoli-Weber
- Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Sandra Goericke-Pesch
- Unit for Reproductive Medicine—Clinic for Small Animals, University for Veterinary Medicine Hannover, Foundation, Hannover, Germany
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Oliveira KR, Neto APO, Diamantino CA, Eiterer IO, Araújo RD, Sancler-Silva YFR, Silva AL, Duarte MS, Rotta PP. Differential average daily gain of pregnant Holstein × Gyr dairy heifers causes placental adaptations to support fetal growth and development. J Dairy Sci 2023; 106:6938-6950. [PMID: 37268585 DOI: 10.3168/jds.2022-23201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 04/24/2023] [Indexed: 06/04/2023]
Abstract
This study aimed to evaluate the effects of differential average daily gain targets of dairy heifers throughout gestation on placental hemodynamics, uterine involution, colostrum production of the heifers, and effects on newborn calf weight and immunity transfer. Fourteen Holstein × Gyr heifers with an average body weight of 446 ± 46.7 kg and age of 25 ± 3.9 mo were randomly assigned to the following treatments: moderate body weight gain (MOD, n = 7), where heifers were fed to achieve 0.50 kg/d; and high body weight gain (HIG, n = 7), where heifers were fed to achieve 0.75 kg/d. Target average daily gains were established based on common tropical dairy production systems. The heifers received a total mixed ration feed twice daily starting at 70 d of gestation. Placentome vascularization was assessed using a color Doppler ultrasound at 180, 210, and 240 d of gestation. After calving, cotyledons were counted and sampled to analyze the mRNA expression of placental angiogenesis markers. After birth, calves were weighed and fed colostrum, and transfer of passive immunity efficiency was assessed. A significant increase in cotyledons was detected for MOD placenta soon after expulsion (81.5 ± 12.91 vs. 63.6 ± 10.52). Placentome vascularization at the final third of gestation increased for MOD heifers compared with HIG. Greater mRNA expression after membrane expulsion of VEGFB and IGFR1 in cotyledons and a greater estradiol concentration in circulation 1 d before calving was found for MOD heifers compared with HIG heifers; however, uterine involution postpartum was not different between treatment groups. Greater colostrum production was observed in HIG heifers (3.9 ± 1.05 vs. 2.2 ± 1.57 L) but with lower quality (25.2 ± 0.51 vs. 29.5 ± 0.65 Brix). No differences were observed in birth weight or transfer of passive immunity efficiency between treatments; however, HIG calves had significantly greater vitality scores than MOD calves. The results of this study indicate that a moderate feeding regimen enhances placental blood flow by increasing angiogenesis, which suggests improved nutrient transfer to the fetus without major effects on its development during the neonatal stage, colostrum production, or uterine involution in the heifers.
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Affiliation(s)
- Kellen R Oliveira
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil
| | - Antônio P O Neto
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil
| | - Caio A Diamantino
- Department of Veterinary Medicine, Universidade Federal de Viçosa, Viçosa, 36571-000, Brazil
| | - Isabela O Eiterer
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil
| | - Renato D Araújo
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil
| | | | - Alex L Silva
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil
| | - Marcio S Duarte
- Department of Animal Biosciences, University of Guelph, Guelph, N1G2W1, Canada
| | - Polyana P Rotta
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil.
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Ultrastructural and Immunohistochemical Characterization of Maternal Myofibroblasts in the Bovine Placenta around Parturition. Vet Sci 2023; 10:vetsci10010044. [PMID: 36669044 PMCID: PMC9863730 DOI: 10.3390/vetsci10010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/23/2022] [Accepted: 12/29/2022] [Indexed: 01/11/2023] Open
Abstract
Myofibroblasts are contractile cells that exhibit features of both fibroblasts and smooth muscle cells. In the synepitheliochorial placenta of the cow myofibroblasts are found in the maternal stroma. However, a deeper understanding of the structure and function of the stromal myofibroblasts in the developed bovine placenta is still missing. Thus, immunohistochemical and ultrastructural analyses in bovine term placentomes, compared to non-pregnant caruncle samples, were conducted. To investigate functional aspects, contractility of placentomal caruncle slices was assessed in an in vitro contraction assay. Additionally, a three-dimensional reconstruction of a bovine placental myofibroblast was created. Immunofluorescent staining revealed a characteristic pattern, including cytoplasmic expression of α-smooth muscle actin, strong perinuclear signal for the intermediate filament vimentin and nuclear progesterone receptor staining. Ultrastructurally, stress fibers, extended cisternae of the rough endoplasmic reticulum and perinuclear intermediate filaments were observed. Moreover, in vitro stimulation with angiotensin-II, but not with prostaglandin F2α, induced contraction of placental caruncle tissue. Altogether, these results indicate that progesterone-responsive myofibroblasts represent a mesenchymal phenotype that is involved in the contractile properties of bovine placental stroma. Therefore, the present findings suggest a potential involvement of myofibroblasts in post-partum events of cattle, i.e., expulsion of fetal membranes and uterine involution.
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Moradi M, Zhandi M, Sharafi M, Akbari A, Atrabi MJ, Totonchi M. Gene expression profile of placentomes and clinical parameters in the cows with retained placenta. BMC Genomics 2022; 23:760. [PMID: 36411408 PMCID: PMC9677913 DOI: 10.1186/s12864-022-08989-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/04/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Retained placenta (RP) is a prevalent disorder in cattle with many health-related and economic costs for the farm owners. Its etiology has not been clarified yet and there is no definite therapy for this disorder. In this study we conducted RNA-seq, hematologic and histologic experiments to survey the causes of RP development. METHODS Blood samples were collected from 4 RP and 3 healthy cows during periparturtion period for hematological assessments followed by placentome sampling within 30 min after parturition. Cows were grouped as RP and control in case the placenta was retained or otherwise expelled, respectively. Total RNA was extracted from placentome samples followed by RNA-sequencing. RESULTS We showed 240 differentially expressed genes (DEGs) between the RP and control groups. Enrichment analyzes indicated immune system and lipid metabolism as prominent over- and under-represented pathways in RP cows, respectively. Hormonal assessments showed that estradiol-17β (E2) was lower and cortisol tended to be higher in RP cows compared to controls at the day of parturition. Furthermore, histologic experiment showed that villi-crypt junctions remain tighter in RP cows compared to controls and the crypts layer seemed thicker in the placentome of RP cows. Complete blood cell (CBC) parameters were not significantly different between the two groups. CONCLUSION Overall, DEGs derived from expression profiling and these genes contributed to enrichment of immune and lipid metabolism pathways. We suggested that E2 could be involved in development of RP and the concentrations of P4 and CBC counts periparturition might not be a determining factor.
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Affiliation(s)
- Mehdi Moradi
- grid.46072.370000 0004 0612 7950Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mahdi Zhandi
- grid.46072.370000 0004 0612 7950Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mohsen Sharafi
- grid.412266.50000 0001 1781 3962Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran ,grid.419336.a0000 0004 0612 4397Department of Embryology, Reproduction Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACER, Tehran, Iran
| | - Arvand Akbari
- grid.417689.5Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mohammad Jafari Atrabi
- grid.411984.10000 0001 0482 5331Institute of Pharmacology and Toxicology, University Medical Center, Georg August University, Göttingen, Germany
| | - Mehdi Totonchi
- grid.417689.5Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
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Li Y, Wen H, Yang Y, Zhao Z, Gao H, Li H, Huang M. Potential prognostic markers of retained placenta in dairy cows identified by plasma metabolomics coupled with clinical laboratory indicators. Vet Q 2022; 42:199-212. [DOI: 10.1080/01652176.2022.2145619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Yuqiong Li
- Laboratory Institute of Animal Science, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan, Ningxia 750002, China
| | - Huiyu Wen
- Laboratory Institute of Animal Science, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan, Ningxia 750002, China
| | - Yuwei Yang
- Laboratory Institute of Animal Science, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan, Ningxia 750002, China
| | - Zhengwei Zhao
- Laboratory Institute of Animal Science, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan, Ningxia 750002, China
| | | | | | - Meizhou Huang
- Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
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Magata F, Sone A, Watanabe Y, Deguchi Y, Aoki T, Haneda S, Ishii M. Prevention of retained fetal membranes and improvement in subsequent fertility with oxytocin administration in cows with assisted calving. Theriogenology 2021; 176:200-205. [PMID: 34627050 DOI: 10.1016/j.theriogenology.2021.09.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 11/30/2022]
Abstract
In dairy cows, the efficacy of oxytocin treatment for preventing retained fetal membranes (RFM) is controversial. The physiological condition of cows associated with the calving process may affect the action of oxytocin. This study aimed to elucidate the difference in the efficacy of exogenous oxytocin treatment immediately after calving among cows that received various obstetric interventions. The calving ease was recorded using a score of 1-5, and assisted birth was defined as a score of 2 or more. Cows that required calving assistance (assisted, n = 28) due to delayed calving progression had a prolonged time from calving to expulsion of the fetal membrane (P < 0.01), and impaired reproductive performance compared to cows that did not receive calving assistance (unassisted, n = 78). The effect of oxytocin treatment was determined using cows that did not expel their fetal membrane within 3 h after calving. Cows were randomly divided into the control (unassisted, n = 41; assisted, n = 22) or oxytocin group (unassisted, n = 33; assisted, n = 10). Oxytocin (50 IU) was administered intramuscularly to the cows in the oxytocin group between 3 and 6 h after calving, while no treatment was administered in the control group. In cows with assisted birth, oxytocin administration accelerated placental expulsion (P < 0.05) and improved several reproductive parameters, such as the number of services until conception (P < 0.05) and the calving to conception intervals (P < 0.05) compared to the control group. On the other hand, oxytocin administration slightly accelerated placental expulsion (P < 0.05), but failed to improve fertility in cows with unassisted birth. The results indicate that the action of oxytocin varies depending on the calving situation of the cows. Oxytocin administration during the early postpartum period could prevent RFM and improve the decline in reproductive performance associated with calving assistance.
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Affiliation(s)
- F Magata
- Department of Veterinary Medical Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
| | - A Sone
- Ishii Veterinary Support Services Inc., Shintoku-cho, Hokkaido, Japan
| | - Y Watanabe
- Department of Livestock Medicine, Japan Agricultural Cooperatives-Shihoro, Shihoro-cho, Hokkaido, Japan
| | - Y Deguchi
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
| | - T Aoki
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
| | - S Haneda
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
| | - M Ishii
- Ishii Veterinary Support Services Inc., Shintoku-cho, Hokkaido, Japan
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Rempel LM, Lillevang KTA, Straten AKT, Friðriksdóttir SB, Körber H, Wehrend A, Kowalewski MP, Reichler IM, Balogh O, Goericke-Pesch S. Do uterine PTGS2, PGFS, and PTGFR expression play a role in canine uterine inertia? Cell Tissue Res 2021; 385:251-264. [PMID: 33830296 PMCID: PMC8270881 DOI: 10.1007/s00441-021-03427-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 01/25/2021] [Indexed: 01/01/2023]
Abstract
The aetiology of primary uterine inertia (PUI), which is the most common cause of canine dystocia, is still not elucidated. Prostaglandins (PGs) play a crucial role in parturition. We hypothesized that the expression of prostaglandin endoperoxidase synthase 2 (PTGS2), PGF2α synthase (PGFS), and corresponding receptor (PTGFR) is altered in PUI. We investigated PTGS2, PGFS, and PTGFR mRNA expression, and PTGS2 and PGFS protein expression in interplacental (IP) and uteroplacental sites (UP) in bitches with PUI, obstructive dystocia (OD), and prepartum (PC). PTGS2, PGFS, and PTGFR mRNA expression did not differ significantly between PUI and OD (IP/UP). PTGFR ratio in UP was higher in PC than in OD (p = 0.014). PTGS2 immunopositivity was noted in foetal trophoblasts, luminal and superficial glandular epithelial cells, smooth muscle cells of both myometrial layers, and weakly and sporadically in deep uterine glands. PGFS was localized in luminal epithelial cells and in the epithelium of superficial uterine glands. PTGS2 and PGFS staining was similar between PUI and OD, while PGFS protein expression differed between OD and PC (p = 0.0215). For PTGS2, the longitudinal myometrial layer of IP stained significantly stronger than the circular layer, independent of groups. These results do not support a role for PTGS2, PGFS, and PTGFR in PUI. Reduced PGFS expression in IP during parturition compared with PC and the overall lack of placental PGFS expression confirm that PGFS is not the main source of prepartal PGF2alpha increase. The difference in PTGS2 expression between IP myometrial layers warrants further investigation into its physiological relevance.
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Affiliation(s)
- Lea Magdalena Rempel
- Reproductive Unit of the Clinics-Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Karina Tietgen Andresen Lillevang
- Reproductive Unit of the Clinics-Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- Department of Veterinary Clinical Sciences, Section of Veterinary Reproduction and Obstetrics, University of Copenhagen, Taastrup, Denmark
| | - Ann-Kirstine thor Straten
- Department of Veterinary Clinical Sciences, Section of Veterinary Reproduction and Obstetrics, University of Copenhagen, Taastrup, Denmark
| | - Sólrún Barbara Friðriksdóttir
- Department of Veterinary Clinical Sciences, Section of Veterinary Reproduction and Obstetrics, University of Copenhagen, Taastrup, Denmark
| | - Hanna Körber
- Reproductive Unit of the Clinics-Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- Department of Veterinary Clinical Sciences, Section of Veterinary Reproduction and Obstetrics, University of Copenhagen, Taastrup, Denmark
| | - Axel Wehrend
- Klinikum Veterinärmedizin, Clinic for Obstetrics, Gynaecology and Andrology for Large and Small Animals with Veterinary Ambulance, Justus-Liebig-University Giessen, Giessen, Germany
| | - Mariusz P. Kowalewski
- Institute of Veterinary Anatomy, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Iris Margaret Reichler
- Clinic of Reproductive Medicine, Vetsuisse-Faculty, University of Zurich, Zurich, Switzerland
| | - Orsolya Balogh
- Clinic of Reproductive Medicine, Vetsuisse-Faculty, University of Zurich, Zurich, Switzerland
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA USA
| | - Sandra Goericke-Pesch
- Reproductive Unit of the Clinics-Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- Department of Veterinary Clinical Sciences, Section of Veterinary Reproduction and Obstetrics, University of Copenhagen, Taastrup, Denmark
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Jamioł M, Wawrzykowski J, Kankofer M. The influence of progesterone and prostaglandin F 2α on decorin and the adhesion of caruncular epithelial cells of bovine placenta at early-mid pregnancy-Part II. Reprod Domest Anim 2021; 56:1040-1049. [PMID: 33966328 DOI: 10.1111/rda.13948] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 05/05/2021] [Indexed: 11/29/2022]
Abstract
One of the most important processes determining the proper course of gestation and its physiological termination in cows is the adhesion of epithelial cells allowing for direct contact of maternal and foetal parts of the placenta. Throughout pregnancy, placental cells are under strict hormonal control, which among others regulates the concentration and activity of specific proteins participating in the extracellular matrix remodelling of foetal membranes. The aim of the study was to evaluate the influence of progesterone and prostaglandin F2α on the adhesion of epithelial cells at early-mid pregnancy in cows. Additionally, the impact of selected hormones on anti-adhesive properties of decorin was evaluated. Caruncular epithelial cells were isolated from healthy cows during pregnancy, immediately after slaughter. Primary cell cultures derived from the 2nd and 4th month of gestation were used in the experiments. The viability of cells was assessed by MTT assay. The adhesion of cells to fibronectin was measured spectrophotometrically. The activity of metalloproteinases was confirmed by the metalloproteinase assay. Progesterone (10-5 and 10-7 mol/L) and prostaglandin F2α (10-4 , 10-5 and 10-7 mol/L) increased the viability of bovine caruncular epithelial cells in the 2nd month of pregnancy. The treatment with prostaglandin F2α significantly reduced the number of adherent cells from the 2nd month of gestation at the doses of 10-4 and 10-5 mol/L. Both progesterone and prostaglandin F2α were shown to have an effect of decorin resulting in both a decrease in metalloproteinase activity and an increase in adhesion of cells to fibronectin.
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Affiliation(s)
- Monika Jamioł
- Faculty of Veterinary Medicine, Department of Biochemistry, University of Life Science in Lublin, Lublin, Poland
| | - Jacek Wawrzykowski
- Faculty of Veterinary Medicine, Department of Biochemistry, University of Life Science in Lublin, Lublin, Poland
| | - Marta Kankofer
- Faculty of Veterinary Medicine, Department of Biochemistry, University of Life Science in Lublin, Lublin, Poland
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10
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Harvey KM, Cooke RF, Colombo EA, Rett B, de Sousa OA, Harvey LM, Russell JR, Pohler KG, Brandão AP. Supplementing organic-complexed or inorganic Co, Cu, Mn, and Zn to beef cows during gestation: physiological and productive response of cows and their offspring until weaning. J Anim Sci 2021; 99:6184569. [PMID: 33758933 PMCID: PMC8218868 DOI: 10.1093/jas/skab095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/20/2021] [Indexed: 12/14/2022] Open
Abstract
One hundred and ninety non-lactating, pregnant beef cows (three-fourth Bos taurus and one-fourth Bos indicus; 138 multiparous and 52 primiparous) were assigned to this experiment at 117 ± 2.2 d of gestation (day 0). Cows were ranked by parity, pregnancy type (artificial insemination = 102 and natural service = 88), body weight (BW), and body condition score (BCS) and assigned to receive a supplement containing: 1) sulfate sources of Cu, Co, Mn, and Zn (INR; n = 95) or 2) an organic-complexed source of Cu, Mn, Co, and Zn (AAC; Availa 4; Zinpro Corporation, Eden Prairie, MN; n = 95). The INR and AAC provided the same daily amount of Cu, Co, Mn, and Zn, based on 7 g of the AAC source. From day 0 to calving, cows were maintained in a single pasture and were segregated three times weekly into 1 of the 24 individual feeding pens to receive treatments. Cow BW and BCS were recorded on days -30, 97, upon calving, and at weaning (day 367). Milk production was estimated at 42 ± 0.5 d postpartum via weigh-suckle-weigh (WSW) method. Liver biopsies were performed in 30 cows per treatment on days -30, 97, upon calving, and the day after WSW. Calf BW was recorded at birth and weaning. Liver and longissimus muscle (LM) biopsies were performed in 30 calves per treatment upon calving and 24 h later, the day after WSW, and at weaning. No treatment effects were detected (P ≥ 0.49) for cow BCS during gestation, despite AAC cows having greater (P = 0.04) BW on day 97. Liver Co concentrations were greater (P < 0.01) for AAC compared with INR cows, and liver concentrations of Cu were greater (P = 0.02) for INR compared with AAC cows on day 97. Upon calving, INR cows had greater (P ≤ 0.01) liver Cu and Zn concentrations compared with AAC cows. No other treatment differences were noted (P ≥ 0.17) for cow and calf liver trace mineral concentrations. Cows receiving AAC had greater (P = 0.04) hepatic mRNA expression of metallothionein 1A at calving, and their calves had greater (P = 0.04) hepatic mRNA expression of superoxide dismutase at weaning. Milk production did not differ between AAC and INR cows (P = 0.70). No treatment effects were detected (P ≥ 0.29) for mRNA expression of LM genes associated with adipogenic or muscle development activities in calves at birth and weaning. Calf birth and weaning BW also did not differ (P ≥ 0.19) between treatments. In summary, supplementing AAC or INR to beef cows during the last 5 mo of gestation yielded similar cow-calf productive responses until weaning.
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Affiliation(s)
- Kelsey M Harvey
- Department of Animal Science, Texas A&M University, College Station, TX 77845, USA.,Prairie Research Unit, Mississippi State University, Prairie, MS 39756, USA
| | - Reinaldo F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX 77845, USA
| | - Eduardo A Colombo
- Department of Animal Science, Texas A&M University, College Station, TX 77845, USA
| | - Bruna Rett
- Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP 18618-970, Brazil
| | - Osvaldo A de Sousa
- Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP 18618-970, Brazil
| | - Lorin M Harvey
- Pontotoc Ridge-Flatwoods Branch Experiment Station, Mississippi State University, Pontotoc, MS 38863, USA
| | | | - Ky G Pohler
- Department of Animal Science, Texas A&M University, College Station, TX 77845, USA
| | - Alice P Brandão
- Department of Animal Science, Texas A&M University, College Station, TX 77845, USA
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11
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Retained bovine placenta - various treatments and their effects. VETERINARSKI GLASNIK 2021. [DOI: 10.2298/vetgl201205003m] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Given the influence of retentio secundinarum (RS) on the reproductive
performance of cows, the current work aimed to assess the effect of various
approaches to the treatment of retained placenta on the main reproductive
parameters, primarily on the interval from parturition to the first service,
and the insemination index. The trial involved 120 dairy cows in which the
placenta was not expelled within 24 h postpartum. The first group (G1, n=60)
contained cows in which the retained placenta was not extirpated, but they
were administered antibiotics. The second group (G2, n=60) comprised cows in
which the placenta was removed manually, and were also administered
antibiotics. At the end of the study, 53 cows remained in G1 and 54 cows in
G2. According to medicament therapy, both groups were divided into three
sub-groups treated with: procaine benzylpenicillin, chlortetracycline
hydrochloride or ceftiofur. Comparison of the performance of G1 and G2 cows
showed significantly better fertility parameters occurred in the animals
from which the retained placenta was extracted manually. The pregnancy rate
in the G2 group was remarkably higher than in the G1 group. The average
service interval was significantly lower (p<0.05) in the G2 group compared
to the G1 group. The best results were obtained with the i.m. administration
of ceftiofur after the removal of the placenta.
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12
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Wynn MAA, Ball BA, Legacki E, Conley A, Loux S, May J, Esteller-Vico A, Stanley S, Scoggin K, Squires E, Troedsson M. Inhibition of 5α-reductase alters pregnane metabolism in the late pregnant mare. Reproduction 2018; 155:251-258. [DOI: 10.1530/rep-17-0380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 01/11/2018] [Indexed: 11/08/2022]
Abstract
In the latter half of gestation in the mare, progesterone concentrations decline to near undetectable levels while other 5α-reduced pregnanes are elevated. Of these, 5α-dihydroprogesterone and allopregnanolone have been reported to have important roles in either pregnancy maintenance or fetal quiescence. During this time, the placenta is necessary for pregnane metabolism, with the enzyme 5α-reductase being required for the conversion of progesterone to 5α-dihydroprogesterone. The objectives of this study were to assess the effects of a 5α-reductase inhibitor, dutasteride on pregnane metabolism (pregnenolone, progesterone, 5α-dihydroprogesterone, 20α-hydroxy-5α-pregnan-3-one, 5α-pregnane-3β,20α-diol and allopregnanolone), to determine circulating dutasteride concentrations and to assess effects of dutasteride treatment on gestational parameters. Pregnant mares (n = 5) received dutasteride (0.01 mg/kg/day, IM) and control mares (n = 4) received vehicle alone from 300 to 320 days of gestation or until parturition. Concentrations of dutasteride, pregnenolone, progesterone, 5α-dihydroprogesterone, 20α-hydroxy-5α-pregnan-3-one, 5α-pregnane-3β,20α-diol, and allopregnanolone were evaluated via liquid chromatography–tandem mass spectrometry. Samples were analyzed as both days post treatment and as days prepartum. No significant treatment effects were detected in pregnenolone, 5α-dihydroprogesterone, 20α-hydroxy-5α-pregnan-3-one, 5α-pregnane-3β,20α-diol or allopregnanolone for either analysis; however, progesterone concentrations were increased (P < 0.05) sixfold in dutasteride-treated mares compared to control mares. Dutasteride concentrations increased in the treated mares, with a significant correlation (P < 0.05) between dutasteride concentrations and pregnenolone or progesterone concentrations. Gestational length and neonatal outcomes were not significantly altered in dutasteride-treated mares. Although 5α-reduced metabolites were unchanged, these data suggest an accumulation of precursor progesterone with inhibition of 5α-reductase, indicating the ability of dutasteride to alter progesterone metabolism.
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13
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Wojciechowska A, Mlynarczuk J, Kotwica J. Disorders in barrier protein mRNA expression and placenta secretory activity under the influence of polychlorinated biphenyls in vitro. Theriogenology 2017; 89:9-19. [DOI: 10.1016/j.theriogenology.2016.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/06/2016] [Accepted: 10/07/2016] [Indexed: 12/19/2022]
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14
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Changes in the mRNA expression of structural proteins, hormone synthesis and secretion from bovine placentome sections after DDT and DDE treatment. Toxicology 2017; 375:1-9. [DOI: 10.1016/j.tox.2016.11.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/14/2016] [Accepted: 11/25/2016] [Indexed: 01/27/2023]
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15
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Marques RS, Cooke RF, Rodrigues MC, Cappellozza BI, Mills RR, Larson CK, Moriel P, Bohnert DW. Effects of organic or inorganic cobalt, copper, manganese, and zinc supplementation to late-gestating beef cows on productive and physiological responses of the offspring. J Anim Sci 2016; 94:1215-26. [PMID: 27065282 DOI: 10.2527/jas.2015-0036] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Eighty-four multiparous, nonlactating, pregnant Angus × Hereford cows were ranked by pregnancy type (56 AI and 28 natural service), BW, and BCS and allocated to 21 drylot pens at the end of their second trimester of gestation (d 0). Pens were assigned to receive forage-based diets containing 1) sulfate sources of Cu, Co, Mn, and Zn (INR); 2) an organic complexed source of Cu, Mn, Co, and Zn (AAC; Availa 4; Zinpro Corporation, Eden Prairie, MN); or 3) no supplemental Cu, Co, Mn, and Zn (CON). Diets were offered from d 0 until calving and formulated to meet requirements for energy, protein, macrominerals, Se, I, and vitamins. The INR and AAC diets provided the same daily amount of Cu, Co, Mn, and Zn. Cow BW and BCS were recorded and liver samples were collected on d -10 and 2 wk (d 75) before the calving season. Within 3 h after calving, calf BW was recorded, liver samples were collected, and the expelled placenta was retrieved ( = 47 placentas). Calves were weaned on d 283 of the experiment, preconditioned for 45 d (d 283 to 328), transferred to a growing lot on d 328, and moved to a finishing lot on d 440 where they remained until slaughter. Liver Co, Cu, and Zn concentrations on d 75 were greater ( ≤ 0.05) for INR and AAC cows compared with CON cows, whereas INR cows had reduced ( = 0.04) liver Co but greater ( = 0.03) liver Cu compared with AAC cows. In placental cotyledons, Co concentrations were greater ( ≤ 0.05) in AAC and INR cows compared with CON cows, whereas Cu concentrations were increased ( = 0.05) only in AAC cows compared with CON cows. Calves from INR and AAC cows had greater ( < 0.01) liver Co concentrations at birth compared with calves from CON cows. Liver Cu and Zn concentrations at birth were greater ( ≤ 0.05) in calves from AAC cows compared with cohorts from CON cows. Weaning BW was greater ( ≤ 0.05) in calves from AAC cows compared with cohorts from CON cows, and this difference was maintained until slaughter. In the growing lot, calves from AAC cows had reduced ( < 0.01) incidence of bovine respiratory disease compared with CON and INR cohorts. Collectively, these results suggest that feeding the AAC diet to late-gestating beef cows stimulated programming effects on postnatal offspring growth and health compared with the CON diet. Therefore, supplementing late-gestating beef cows with an organic complexed source of Co, Cu, Zn, and Mn instead of no supplementation appears to optimize offspring productivity in beef production systems.
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16
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Olson DM. The Promise of Prostaglandins: Have They Fulfilled Their Potential as Therapeutic Targets for the Delay of Preterm Birth? ACTA ACUST UNITED AC 2016; 12:466-78. [PMID: 16202923 DOI: 10.1016/j.jsgi.2005.06.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2004] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The elucidation some 30 years ago by Sir Mont Liggins that the activation of the hypothalamic-pituitary-adrenal-placental axis in fetal sheep led to elevated maternal prostaglandin (PG) concentrations and the initiation of labor provided hope that targeting PG synthesis or action would lead to effective tocolysis and lowering of the human preterm birth rate. This was the "promise of PGs." METHODS AND RESULTS Although early trials showed that nonsteroidal anti-inflammatory drugs (NSAIDs), which inhibit PG H synthase (PGHS), delayed preterm birth by 48 hours, other trials revealed an association between NSAIDs and adverse fetal effects, including oligohydramnios, patent ductus arteriosus, necrotizing enterocolitis, intraventricular hemorrhage, and persistent pulmonary hypertension of the newborn (PPHN). Hope was revived when studies in the mid 1990s demonstrated that much of the PGs synthesized by intrauterine tissues at preterm labor were derived from the inducible isoenzyme PGHS-2. Unfortunately, administration of specific PGHS-2 inhibitors led to the same adverse fetal effects displayed by the mixed PGHS-1 and -2 NSAIDs, causing interest in the promise of PGs to wane. This led to the development of new strategies for specific PG inhibition or antagonism. One of these is the application of a specific PGF2alpha receptor blocker, Theratechnologies (THG)113.31. THG113.31 decreases the in vitro contractile activity of mouse, sheep, and human myometrium in response to exogenous PGF2alpha, delays lipopolysaccharide (LPS)-induced preterm birth in mice, and lowers uterine electromyographic activity and delays preterm birth in sheep administered RU486. There have been no observable maternal or fetal side effects with its use. CONCLUSION By developing new strategies based on other therapeutic targets, the promise of PGs may once again offer hope for delaying preterm birth.
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Affiliation(s)
- David M Olson
- Department of Obstetrics and Gynecology, Perinatal Research Centre, University of Alberta, Edmonton, Alberta, Canada.
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17
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Attupuram NM, Kumaresan A, Narayanan K, Kumar H. Cellular and molecular mechanisms involved in placental separation in the bovine: A review. Mol Reprod Dev 2016; 83:287-97. [PMID: 26970238 DOI: 10.1002/mrd.22635] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 02/23/2016] [Indexed: 01/04/2023]
Abstract
Retention of fetal membranes (RFM), where the fetal placenta is not expelled within 8-12 hr after calving, lowers bovine productivity and fertility, resulting in significant economic loss to the dairy industry. Several risk factors that predispose an individual to RFM are known, but a unifying pathogenesis remains elusive due to its multifactorial etiology. Fetal membrane separation and expulsion after parturition involves structural and immunological changes of the bovine placentome that are governed predominantly by steroid hormones and the prostaglandin milieu of late pregnancy and parturition. Maturation of the placentome, a gradual and concerted event of late gestation, is likely initiated by the up-regulation of fetal major histocompatibility complex class I in the interplacentomal region-which increases the apoptosis of binucleate and other trophoblastic cells, the degradation of collagen in the extracellular matrix by matrix metalloproteinases, and an influx of phagocytic leukocytes. Shear force further distorts the crypt architecture of the mature placentomes when they are forced against the fetus during the second stage of labor. Cotyledon dehiscence from the caruncular crypts is completed following fetal expulsion as a result of acute shrinkage of the cotelydonary villi as well as reduced perfusion to the caruncle; the secundinae is expelled by uterine contractions. A better understanding of placentomal maturation, intra-partum, and immediate postpartum changes of the placentome should help develop strategies for the treatment and prevention of RFM. The present review proposes a model of placentome maturation and separation of fetal membranes in the dairy cow.
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Affiliation(s)
- N M Attupuram
- Theriogenology Lab, Animal Reproduction, Gynaecology and Obstetrics, National Dairy Research Institute, Karnal, Haryana, India
| | - A Kumaresan
- Theriogenology Lab, Animal Reproduction, Gynaecology and Obstetrics, National Dairy Research Institute, Karnal, Haryana, India
| | - K Narayanan
- Division of Animal Reproduction, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - H Kumar
- Division of Animal Reproduction, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
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18
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Wojciechowska A, Młynarczuk J, Kotwica J. Short-term incubation of bovine placentome sections as a tool to study xenobiotic mechanism of action. Reprod Biol 2015; 15:238-46. [PMID: 26679165 DOI: 10.1016/j.repbio.2015.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 10/09/2015] [Accepted: 10/10/2015] [Indexed: 11/18/2022]
Abstract
Studies on the effects of various factors, including xenobiotics, on the maternal-fetal connections in the placenta are restricted by the lack of a simple and inexpensive research model. We used placentomes collected at a slaughterhouse to in vitro study the bovine sections contained integral maternal-fetal connections. The placentomes from cows (n=4/experiment, 120-150 days post coitum) were cut using a razor blade into 60-80 mg sections and incubated in either DMEM/Ham's F-12 or M-199 supplemented with FCS (2%, 5% or 10%), amniotic fluid (AF or inactive AF, 10% or 20%) or both. The sections (n=4/supplement) were incubated for 24 or 48 h in a water bath at 37.5°C in an atmosphere of 5% CO2 and 95% O2. The structure and secretory activity of placentome sections were maintained when incubated in DMEM/Ham's F-12 with 2% FCS and 10% AF. M-199 was less acidified than DMEM/Ham's F-12 during incubation, and thus, this medium was better able to maintain the integrity of the placenta and the secretion of estradiol, progesterone and oxytocin for 48 h. Moreover, we detected a decrease in the expression of placenta-specific 1 (PLAC1) mRNA (an indicator of trophoblast proliferation) and an increase in the levels of keratin 8 (KRT8; a marker of normal placental barrier function) and hypoxia induced factor 1α (HIF1α; a marker of hypoxia) mRNA. These results indicate the presence of adaptation and repair mechanisms and confirm the biological activity of the placentome sections. We propose the use of placentome sections as an in vitro model to study maternal-fetal connections in cows.
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Affiliation(s)
- Anna Wojciechowska
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-747 Olsztyn, Poland
| | - Jarosław Młynarczuk
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-747 Olsztyn, Poland.
| | - Jan Kotwica
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-747 Olsztyn, Poland
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19
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Hartmann D, Bollwein H, Honnens Ä, Niemann H, Rath D, Pfarrer C. Protracted induction of parturition enhances placental maturation, but does not influence incidence of placental retention in cows. Theriogenology 2013; 80:185-92. [DOI: 10.1016/j.theriogenology.2013.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 03/31/2013] [Accepted: 04/04/2013] [Indexed: 11/28/2022]
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20
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Hartmann D, Honnens Ä, Piechotta M, Lüttgenau J, Niemann H, Rath D, Bollwein H. Effects of a protracted induction of parturition on the incidence of retained placenta and assessment of uterine artery blood flow as a measure of placental maturation in cattle. Theriogenology 2013; 80:176-84. [DOI: 10.1016/j.theriogenology.2013.02.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 01/31/2013] [Accepted: 02/01/2013] [Indexed: 11/28/2022]
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21
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Grossi P, Bertoni G, Cappelli FP, Trevisi E. Effects of the precalving administration of omega-3 fatty acids alone or in combination with acetylsalicylic acid in periparturient dairy cows1. J Anim Sci 2013; 91:2657-66. [DOI: 10.2527/jas.2012-5661] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
| | - G. Bertoni
- Istituto di Zootecnica, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - F. Piccioli Cappelli
- Istituto di Zootecnica, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - E. Trevisi
- Istituto di Zootecnica, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
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22
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Nguyen PTT, Conley AJ, Sneyd J, Lee RSF, Soboleva TK, Shorten PR. The role of enzyme compartmentalization on the regulation of steroid synthesis. J Theor Biol 2013; 332:52-64. [PMID: 23639404 DOI: 10.1016/j.jtbi.2013.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 04/11/2013] [Accepted: 04/12/2013] [Indexed: 11/17/2022]
Abstract
Steroidogenic enzymes can be compartmentalized at different levels, some by virtue of being membrane bound in specific intra-cellular compartments. Although both 3β-hydroxysteroid dehydrogenase/Δ(5)-Δ(4) isomerase (3β-HSD) and 17α-hydroxylase/17,20-lyase cytochrome P450 (P450c17) are expressed in the endoplasmic reticulum (ER) membrane, these proteins may still be spatially separated within this membrane system. Side chain cleavage cytochrome P450 (P450scc) is anchored to the inner mitochondrial membrane and this organelle is the major source of pregnenolone (P5) feeding steroidogenesis. Furthermore, steroidogenic enzymes can also be partitioned in different cells. Although well recognized, the effect of enzyme compartmentalization on the rate of steroid production and the balance of different steroids is unclear. This study uses mathematical modeling to investigate the effect of enzyme compartmentalization on steroid synthesis in a human-ovine-bovine model of steroid synthesis. The study shows that the spatial separation of steroidogenic enzymes within the ER has a minimal effect on the rate of steroid synthesis. The compartmentalization of the enzymes into different organelles of a cell creates cellular steroid gradients and can affect the balance of the different steroid products. The partitioning of steroidogenic enzymes in different cells reduces the rate of steroid synthesis. The greater is the distance between the cells that contain different enzymes, the more the rate of steroid synthesis is reduced. Additionally, when 3β-HSD is not in the same cell with P450scc (the P5 source) and P450c17, the ratio of the Δ(5)-pathway products' concentrations to the Δ(4)-pathway products' concentrations is increased. However, none of these levels of compartmentalization of steroidogenic enzymes alter the qualitative behaviors of steroid synthesis in response to variation in an enzyme activity or P5 supply.
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Affiliation(s)
- Phuong T T Nguyen
- Agresearch Limited, Ruakura Research Centre, Private Bag 3123, Hamilton, New Zealand
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23
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Effects of exogenous oxytocin on uterine blood flow in puerperal dairy cows: The impact of days after parturition and retained fetal membranes. Vet J 2013; 196:76-80. [DOI: 10.1016/j.tvjl.2012.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 07/18/2012] [Accepted: 08/12/2012] [Indexed: 11/20/2022]
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24
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Kankofer M, Wawrzykowski J, Hoedemaker M. The presence of SOD 1 and GSH-Px in bovine retained and properly released foetal membranes. Reprod Domest Anim 2013; 48:699-704. [PMID: 23398331 DOI: 10.1111/rda.12152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Accepted: 01/07/2013] [Indexed: 12/01/2022]
Abstract
The maintenance of antioxidative/oxidative balance is crucial for cellular and extracellular environment. That is why antioxidative enzymes express their activity in different isoforms in different cell compartments and extracellular space. The aim of study was to verify the results of previous experiment on activities of antioxidative enzymes by the determination of their enzymatic proteins in bovine placental tissues by Western blotting technique. Moreover, the presence of particular isoenzymes was detected and differentiated. Homogenates of maternal and foetal part of both properly released and retained bovine placenta were subjected to PAGE electrophoresis in non-reducing and reducing conditions and Western blotting with appropriate antibodies against superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px). Electrophoresis allowed for the detection of protein bands of molecular weight related to CuZn-SOD as well as cGSH-Px isoenzymes. The reaction with appropriate antibodies confirmed this. Densitometric analysis, although semi-quantitative, allowed for the observation of trends in differences in antioxidative enzyme proteins, which may partly confirm previously described results in cases of retained and released placenta. Local antioxidative enzymatic mechanisms in bovine placental tissues are represented by CuZn-SOD and cGSH-Px, which show the changes in their expression during improper placental release.
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Affiliation(s)
- M Kankofer
- Departament of Animal Biochemistry and Physiology, Faculty of Veterinary Medicine, University of Life Sciences, Lublin, Poland.
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25
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Kamada H, Matsui Y, Sakurai Y, Tanigawa T, Itoh M, Kawamoto S, Kai K, Sasaki T, Takahashi K, Hayashi M, Takayama Y, Nakamura M, Kadokawa H, Ueda Y, Sutoh M, Murai M. Twelve oxo-eicosatetraenoic acid induces fetal membrane release after delivery in cows. Placenta 2011; 33:106-13. [PMID: 22118869 DOI: 10.1016/j.placenta.2011.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 10/29/2011] [Accepted: 11/01/2011] [Indexed: 10/15/2022]
Abstract
Fetal fibroblast cell culture from cotyledons of bovine placenta and animal experiments close to term were used to elucidate afterbirth release and factors missing in the signal transduction mechanism for retained fetal membranes (RFM) after delivery. In cell culture the addition of arachidonic acid (Ara) to the medium caused rapid release to free floating cell in the culture dish, accompanied by matrix metalloproteinase (MMP) activation, being consistent with previous in vivo observations, where a relation between MMP and fetal membrane release had been shown. Ara-induced cell floating was not inhibited by the addition of cyclooxygenase (COX) inhibitor, and not induced by the addition of PGF2α or PGE2 to replace Ara, while 12-lipoxygenase (12-LOX) metabolite of Ara, 12-oxo-eicosatetraenoic acid (12-oxoETE), strongly induced cell floating. In the animal experiments, 12-oxoETE injection to delivery-induced cows (n = 6) using prostaglandin (PG) and dexamethazone resulted in rapid release of fetal membranes. In cows with natural calf delivery, a 12-oxoETE peak (11.7-16.8 ng/ml) was observed in maternal blood plasma prior to release of fetal membranes. This investigation thus gives new indications for that the mediator for fetal membrane release is 12-oxoETE and not PG.
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Affiliation(s)
- H Kamada
- NARO Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan.
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26
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Expression of matrix metalloproteinase (MMP)-2, MMP-14 and tissue inhibitor of matrix metalloproteinase (TIMP)-2 during bovine placentation and at term with or without placental retention. Theriogenology 2011; 75:1104-14. [DOI: 10.1016/j.theriogenology.2010.11.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/09/2010] [Accepted: 11/10/2010] [Indexed: 11/17/2022]
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27
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Influences of diet during gestation on potential postpartum reproductive performance and milk production of beef heifers. Theriogenology 2009; 72:1202-14. [DOI: 10.1016/j.theriogenology.2009.07.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Revised: 06/25/2009] [Accepted: 07/05/2009] [Indexed: 11/23/2022]
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28
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McNaughton AP, Murray RD. Structure and function of the bovine fetomaternal unit in relation to the causes of retained fetal membranes. Vet Rec 2009; 165:615-22. [DOI: 10.1136/vr.165.21.615] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- A. P. McNaughton
- Veterinary Teaching Hospital; School of Veterinary Clinical Science; University of Liverpool, Leahurst; Chester High Road Neston Cheshire CH64 7TE
| | - R. D. Murray
- Veterinary Teaching Hospital; School of Veterinary Clinical Science; University of Liverpool, Leahurst; Chester High Road Neston Cheshire CH64 7TE
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29
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Sullivan T, Micke G, Magalhaes R, Phillips N, Perry V. Dietary protein during gestation affects placental development in heifers. Theriogenology 2009; 72:427-38. [DOI: 10.1016/j.theriogenology.2009.03.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 03/03/2009] [Accepted: 03/28/2009] [Indexed: 11/28/2022]
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30
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Richards BD, Black DH, Christley RM, Royal MD, Smith RF, Dobson H. Effects of the administration of ketoprofen at parturition on the milk yield and fertility of Holstein-Friesian cattle. Vet Rec 2009; 165:102-6. [DOI: 10.1136/vetrec.165.4.102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
| | - D. H. Black
- Paragon Veterinary Group; Townhead Road Dalston Cumbria CA5 7JF
| | | | | | | | - H. Dobson
- Hon Assoc RCVS; Department of Veterinary Clinical Science; University of Liverpool, Leahurst; Neston Cheshire CH64 7TE
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Kizaki K, Ushizawa K, Takahashi T, Yamada O, Todoroki J, Sato T, Ito A, Hashizume K. Gelatinase (MMP-2 and -9) expression profiles during gestation in the bovine endometrium. Reprod Biol Endocrinol 2008; 6:66. [PMID: 19116037 PMCID: PMC2615774 DOI: 10.1186/1477-7827-6-66] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2008] [Accepted: 12/31/2008] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Various molecules participate in implantation and maintaining endometrial function during gestation. The remodeling of endometrial matrices is a necessary process in the coordination of gestational progress. Matrix-metalloproteinases (MMPs) like gelatinases (MMP-2 and -9) and collagenase (MMP-1) are considered to play important roles in this process. We examined MMP-2 and -9 expression using zymography, in situ hybridization, real-time PCR, and microarray analysis to clarify their roles in the bovine endometrium during gestation. METHODS Endometria, placentomes, and fetal membranes were collected from Japanese black cows that were killed on day 15 to 252 of gestation or during their estrous cycle. The gene expression of MMP-related molecules (mainly MMP-2 and -9) was examined using a custom-made microarray, real-time RT-PCR, and in-situ hybridization. Gelatinase activity was detected by zymography and film in situ zymography. RESULTS Both gelatinases were expressed in the endometrium and fetal tissues throughout gestation. MMP-2 gene expression declined with the progress of gestation, but its intensity was maintained at a high level during the peri-implantation period and increased in late gestation. The expression level of MMP-9 was stably maintained, but was relatively low compared to that of MMP-2. These gene expression patterns matched those detected by zymography for the proteins. Microarray analysis suggested that the functions of MMP-2 during implantation and the last part of gestation are closely related with those of other molecules such as tissue inhibitors of metalloproteinase (TIMP)-2, a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) 1, membrane type 1 (MT1)-MMP, and extracellular matrix metalloproteinase inducer (EMMPRIN). CONCLUSION We detected MMP-2 and -9 gene expression in the bovine endometrium and placentome throughout gestation. These data suggest that MMP-2 is one of the main endometrial remodeling factors for implantation and pre-partum in cattle. In cows, as is the case in humans and rodents, gelatinases participate in endometrial remodeling, and their activities depend on the balance of activators and inhibitors; i.e., TIMP, MT-MMP, EMMPRIN, MMP-2, MMP-9, and so on.
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Affiliation(s)
- Keiichiro Kizaki
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Iwate University, Ueda 3-18-8, Morioka, Iwate 020-8550, Japan
| | - Koichi Ushizawa
- Department of Developmental Biology, National Institute of Agrobiological Sciences, Ikenodai 2, Tsukuba, Ibaraki 305-8602, Japan
| | - Toru Takahashi
- Department of Developmental Biology, National Institute of Agrobiological Sciences, Ikenodai 2, Tsukuba, Ibaraki 305-8602, Japan
| | - Osamu Yamada
- Miyagi Prefectural Animal Health Hygiene Ogawara Station, Miyagi 989-1243, Japan
| | - Junichi Todoroki
- Team Todoroki ARR, Kurahara, Miyakonojo, Miyazaki 855-0051, Japan
| | - Takashi Sato
- Department of Biochemistry and Molecular Biology, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo 192-0392, Japan
| | - Akira Ito
- Department of Biochemistry and Molecular Biology, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo 192-0392, Japan
| | - Kazuyoshi Hashizume
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Iwate University, Ueda 3-18-8, Morioka, Iwate 020-8550, Japan
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Takagi M, Yamamoto D, Ogawa S, Otoi T, Ohtani M, Miyamoto A. Messenger RNA expression of angiotensin-converting enzyme, endothelin, cyclooxygenase-2 and prostaglandin synthases in bovine placentomes during gestation and the postpartum period. Vet J 2008; 177:398-404. [PMID: 17804266 DOI: 10.1016/j.tvjl.2007.05.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Revised: 04/22/2007] [Accepted: 05/24/2007] [Indexed: 11/27/2022]
Abstract
The bovine placenta contains local vasoactive-related systems, including angiotensin-converting enzyme (ACE), endothelin-1 (ET-1), ET-A receptor (ETAR) and ET-B receptor (ETBR), as well as arachidonic acid (AA) cascade-related enzymes, such as cyclooxygenase-2 (Cox-2), prostaglandin E-synthase (PGES) and prostaglandin F-synthase (PGFS). The mRNA expression of these molecules was examined in bovine placentomes (caruncles and cotyledons) collected immediately (0 h) and 6h after spontaneous parturition from 15 cows with early (fetal membranes released within 6 h of parturition) or late (fetal membranes released 6-12 h after parturition) detachment, as well as from 15 pregnant cows at a slaughterhouse. Significant differences were observed in expression of ET-1, ETAR and ETBR mRNAs between gestation and the postpartum period in both caruncles and cotyledons. Significant differences were also found between 0 and 6 h postpartum in the expression of ETBR mRNA in the early detachment group and PGES mRNA in the early and late detachment groups. Compared to PGFS, both Cox-2 and PGES exhibited opposite mRNA expression patterns during gestation and the postpartum period. The vasoactive-related peptide systems and AA cascade-related enzymes may mediate placental development and fetal membrane detachment after parturition in cattle.
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Affiliation(s)
- M Takagi
- Laboratory of Farm Animal Production Medicine, Kagoshima University, Kagoshima 890-0064, Japan.
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Shah KD, Nakao T, Kubota H, Maeda T. Peripartum Changes in Plasma Estrone Sulfate and Estradiol-17.BETA. Profiles Associated With and Without the Retention of Fetal Membranes in Holstein-Friesian Cattle. J Reprod Dev 2007; 53:279-88. [PMID: 17135712 DOI: 10.1262/jrd.18080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The aim of this study was to evaluate the changes in plasma concentrations of estrone sulfate (E(1)S) and estradiol-17beta (E(2)beta) during the peripartum period (from day 10 prepartum to day 1 postpartum) associated with and without retention of fetal membranes (RFM) in Holstein-Friesian cattle (n=42). Plasma samples were analyzed for E(1)S and E(2)beta by ELISA. All parturitions were spontaneous and normal. Of 38 cattle delivering singletons, 29 had no RFM (singleton-normal group) and nine had RFM for more than 12 h (singleton-RFM group). Four cows gave birth to twins, and each twin had its own fetal membrane (FM). Two twinning cows expelled both FMs normally within 12 h (twin-normal group). In the remaining 2 twinning cows (twin-RFM group), the FM was expelled normally for one twin (first), while the FM of the other (second) was retained. There were no significant differences in the E(1)S concentrations or their increments from the concentrations on the preceding day between the normal and RFM groups of singleton cows on any peripartum day. The mean plasma E(2)beta concentrations on each day from day 10 to day 3 prepartum were significantly lower (P<0.05) in the singleton-RFM group compared with the singleton-normal group; however, on days 2 and 1 prepartum, the increments in the E(2)beta concentrations from the concentrations on the preceding days were significantly higher (P<0.05) in the singleton-RFM group than in the singleton-normal group. Thus, the plasma E(1)S concentrations just before parturition may not be associated with RFM. In the cows with RFM, the lower plasma E(2)beta concentrations that were found prior to day 2 prepartum may have been associated with immature placentomes, and the rapid rise in plasma E(2) beta within 1 to 2 days prior to calving may have produced asynchrony of placental and/or fetal maturation in relation to calving, thus resulting in RFM.
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Affiliation(s)
- Kapil Deo Shah
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
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Takagi M, Yamamoto D, Ohtani M, Miyamoto A. Quantitative analysis of messenger RNA expression of matrix metalloproteinases (MMP-2 and MMP-9), tissue inhibitor-2 of matrix metalloproteinases (TIMP-2), and steroidogenic enzymes in bovine placentomes during gestation and postpartum. Mol Reprod Dev 2007; 74:801-7. [PMID: 17154296 DOI: 10.1002/mrd.20637] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The relationship between the mRNA expression of proteolytic and steroidogenic enzymes in bovine placentomes was examined. Caruncle and cotyledon tissues were collected every 6 hr after spontaneous parturition until the fetal membranes were released. Based on the time of fetal membrane release after parturition, the specimens were classified as follows: (1) the early group, in which the fetal membranes were released within 6 hr after parturition; and (2) the late group, in which the fetal membranes were released 6-12 hr after parturition. The placentomes from a slaughterhouse were additionally collected as samples for the examination of enzymes during the gestation period. The mRNA expression of steroidogenic enzymes in the cotyledon was observed to be higher than that in caruncle tissues; however, the mRNA expression patterns of P450scc and StAR tended to be similar in both placental tissues. On the other hand, although the expression levels of TIMP-2 mRNA in both caruncle and cotyledon tissues were similar, during gestation and postpartum the expression levels of MMP-2 and MMP-9 mRNA were approximately 10 times higher in caruncle than in cotyledon tissue. Marked contrasting changes in mRNA expression patterns between pre- and postpartum periods were observed for MMP-2 and MMP-9 in caruncle tissues and for MMP-9 and TIMP-2 in cotyledon tissues. The present study provides the first evidence that MMP-2, MMP-9, and TIMP-2 mRNAs are expressed in bovine placentomes during the gestational and postpartum periods and suggests that these enzymes, in conjunction with steroidogenic enzymes, mediate fetal membrane detachment after parturition.
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Affiliation(s)
- M Takagi
- Laboratory of Farm Animal Production Medicine, Kagoshima University, Kagoshima, Japan.
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Zaragoza DB, Wilson RR, Mitchell BF, Olson DM. The Interleukin 1beta-Induced Expression of Human Prostaglandin F2alpha Receptor Messenger RNA in Human Myometrial-Derived ULTR Cells Requires the Transcription Factor, NFkappaB1. Biol Reprod 2006; 75:697-704. [PMID: 16855208 DOI: 10.1095/biolreprod.106.053439] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The molecular mechanisms that regulate the expression of genes involved in parturition are poorly understood. The mRNA expression of the prostaglandin F(2alpha) receptor (PTGFR), a uterine activating gene, is increased at labor and is required for uterine contractile activity in numerous animal models, although the signaling pathways responsible for this increased expression have not been identified. Proinflammatory cytokines have been proposed to regulate the expression of the uterine activating genes via activation of the nuclear transcription factor, NFkappaB, and initiate labor. However, it is uncertain whether uterine PTGFR is regulated this way. In this report, we demonstrate for the first time that treatment of immortalized human myometrial-derived ULTR cells with the proinflammatory cytokine IL1beta causes an increase in PTGFR mRNA levels. Furthermore, IL1beta treatment increased the nuclear levels of the RELA subunit of NFkappaB and increased binding of RELA to the NFkappaB DNA-binding site. Inhibition of NFkappaB activation with either the proteasome inhibitor MG132 or phenethyl caffeiate reduced PTGFR mRNA levels, which indicates that this transcription factor is important for basal transcription. Furthermore, this inhibition prevented IL1beta induction ofPTGFRmRNA, which confirms that NFkappaB is required for the IL1beta-induced increase inPTGFR. These results are consistent with the proposal that proinflammatory cytokines directly regulate uterine activation genes and that the transcription factor NFkappaB is involved in both basal and IL1beta-stimulated transcription of the PTGFR gene.
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Affiliation(s)
- Dean B Zaragoza
- Department of Obstetrics & Gynecology, University of Alberta, Canada.
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Hirst JJ, Parkington HC, Young IR, Palliser HK, Peri KG, Olson DM. Delay of preterm birth in sheep by THG113.31, a prostaglandin F2alpha receptor antagonist. Am J Obstet Gynecol 2005; 193:256-66. [PMID: 16021088 DOI: 10.1016/j.ajog.2004.11.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE A novel prostaglandin F2alpha receptor antagonist, THG113.31, was tested for the suppression of uterine contractility and delay of preterm labor in sheep. STUDY DESIGN We determined the tocolytic effectiveness of THG113.31 on contractions that were stimulated in vitro by prostaglandin F2alpha and E2 in longitudinal and circular myometrial strips. We also tested the ability of THG113.31 in vivo to lower uterine electromyographic activity that was induced by the progesterone receptor blocker, RU486, and to delay preterm birth. RESULTS THG113.31 suppressed the amplitude of prostaglandin F2alpha, but not prostaglandin E2-induced contractions of both circular and longitudinal myometrium (P<.01). The times to delivery after RU486 were 34.8+/-1.1 hours (saline solution) and 41.9+/-0.5 hours (THG113.31; P<.001) or an average delay of 7.1 hours. There were no changes in fetal blood gases (PaO2 , PaCO2 , pH, or SaO2) because of THG113.31. Fetal cortisol levels rose in each group, and fetal and maternal prostaglandin E2 and F2alpha metabolite concentrations rose similarly in both groups. CONCLUSION THG113.31 specifically suppresses prostaglandin F2alpha-induced myometrial contractility and delays delivery.
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Affiliation(s)
- Jonathan J Hirst
- Department of Physiology, Monash University, Clayton, Victoria, Australia
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Abstract
Parturition is composed of five separate but integrated physiological events: fetal membrane rupture, cervical dilatation, myometrial contractility, placental separation and uterine involution. Prostaglandins (PGs) have central roles in each of these, but the most studied is myometrial contraction. Elevated uterine PGs or the enhanced sensitivity of the myometrium to PGs leads to contractions and labour. The regulator of PG synthesis is the mRNA expression of PGHS-2. Cytokines are important stimulators of this gene expression, and cortisol and other factors may be as well. This enzyme is an important therapeutic target in the prevention of preterm labour. Some preterm births occur without an elevation of uterine PGs, even though they are delayed by non-steroidal anti-inflammatory drugs (NSAIDs), suggesting enhanced myometrial sensitivity to PGs. The PGF(2alpha) receptor, FP, is emerging as a central component of uterine sensitivity and may prove to be involved with preterm birth and a reasonable target for tocolysis.
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Affiliation(s)
- David M Olson
- Department of Obstetrics and Gynaecology, CIHR Group in Perinatal Health and Disease, Perinatal Research Centre, University of Alberta, Edmonton, Canada.
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