1
|
Zhou F, Zhong LL, Tan Y, Liu L, Pei G. A metabolomic approach to study triptolide-induced ovarian damage in rats. Toxicology 2022; 482:153351. [DOI: 10.1016/j.tox.2022.153351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/30/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022]
|
2
|
Kim J, You S. Comprehensive analysis of miRNA-mRNA interactions in ovaries of aged mice. Anim Sci J 2022; 93:e13721. [PMID: 35417047 PMCID: PMC9285582 DOI: 10.1111/asj.13721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 03/04/2022] [Accepted: 03/09/2022] [Indexed: 01/01/2023]
Abstract
Advanced maternal age and ovarian aging are deleterious to the quantity and quality of oocytes and epigenetic modifications, which can affect the health of offspring. However, relatively little is known about the regulation of microRNA-mediated transcription during ovarian aging. We therefore aimed to identify age-related mRNA and microRNA changes and their interactions in the ovaries of aged mice. We performed QuantSeq 3'mRNA and small RNA sequencing to compare their expression patterns in post-ovulation ovaries from young (12-week-old) and old (44-week-old) mice. Functional annotation and integrative analyses were performed to identify the potential functions of differentially expressed genes and identify binding sites for critical microRNAs. We found 343 differentially expressed genes and 9 microRNAs in our comparison of the two mouse groups, with fold changes >2.0 (P < 0.01). Furthermore, we identified possible direct interactions between 24 differentially expressed mRNAs and 8 microRNAs. The differentially expressed genes are involved in fat digestion and absorption, the PI3K-Akt signaling pathway, serotonergic synapse, and ovarian steroidogenesis, which are important for folliculogenesis and oocyte growth. During ovarian aging, changes in gene expression induce alterations in folliculogenesis, oocyte growth, and steroidogenesis, resulting in decreased oocyte quality and reproductive outcomes.
Collapse
Affiliation(s)
- Jihyun Kim
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon, South Korea
| | - Sooseong You
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon, South Korea
| |
Collapse
|
3
|
Watkins OC, Yong HEJ, Sharma N, Chan SY. A review of the role of inositols in conditions of insulin dysregulation and in uncomplicated and pathological pregnancy. Crit Rev Food Sci Nutr 2020; 62:1626-1673. [PMID: 33280430 DOI: 10.1080/10408398.2020.1845604] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Inositols, a group of 6-carbon polyols, are highly bioactive molecules derived from diet and endogenous synthesis. Inositols and their derivatives are involved in glucose and lipid metabolism and participate in insulin-signaling, with perturbations in inositol processing being associated with conditions involving insulin resistance, dysglycemia and dyslipidemia such as polycystic ovary syndrome and diabetes. Pregnancy is similarly characterized by substantial and complex changes in glycemic and lipidomic regulation as part of maternal adaptation and is also associated with physiological alterations in inositol processing. Disruptions in maternal adaptation are postulated to have a critical pathophysiological role in pregnancy complications such as gestational diabetes and pre-eclampsia. Inositol supplementation has shown promise as an intervention for the alleviation of symptoms in conditions of insulin resistance and for gestational diabetes prevention. However, the mechanisms behind these affects are not fully understood. In this review, we explore the role of inositols in conditions of insulin dysregulation and in pregnancy, and identify priority areas for research. We particularly examine the role and function of inositols within the maternal-placental-fetal axis in both uncomplicated and pathological pregnancies. We also discuss how inositols may mediate maternal-placental-fetal cross-talk, and regulate fetal growth and development, and suggest that inositols play a vital role in promoting healthy pregnancy.
Collapse
Affiliation(s)
- Oliver C Watkins
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Hannah E J Yong
- Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore, Singapore
| | - Neha Sharma
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Shiao-Yng Chan
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore, Singapore
| |
Collapse
|
4
|
Cantu TM, Bowden JA, Scott J, Pérez-Viscasillas JB, Huncik K, Guillette MP, Guillette LJ. Alterations in eicosanoid composition during embryonic development in the chorioallantoic membrane of the American alligator (Alligator mississippiensis) and domestic chicken (Gallus gallus). Gen Comp Endocrinol 2016; 238:78-87. [PMID: 27401262 PMCID: PMC5584055 DOI: 10.1016/j.ygcen.2016.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 06/23/2016] [Accepted: 07/07/2016] [Indexed: 12/21/2022]
Abstract
Eicosanoids are signaling lipids known to regulate several physiological processes in the mammalian placenta, including the initiation of parturition. Though all amniotes construct similar extraembryonic membranes during development, the composition and function of eicosanoids in extraembryonic membranes of oviparous reptiles is largely unknown. The majority of effort placed in eicosanoid investigations is typically targeted toward defining the role of specific compounds in disease etiology; however, comprehensive characterization of several pathways in eicosanoid synthesis during development is also needed to better understand the complex role of these lipids in comparative species. To this end, we have examined the chorioallantoic membrane (CAM) of the American alligator (Alligator mississippiensis) and domestic chicken (Gallus gallus) during development. Previously, our lab has demonstrated that the CAM of several oviparous species shared conserved steroidogenic activity, a feature originally attributed to mammalian amniotes. To further explore this, we have developed a liquid chromatography/tandem mass spectrometry method that is used here to quantify multiple eicosanoids in the CAM of two oviparous species at different stages of development. We identified 18 eicosanoids in the alligator CAM; the cyclooxygenase (COX) pathway showed the largest increase from early development to later development in the alligator CAM. Similarly, the chicken CAM had an increase in COX products and COX activity, which supports the LC-MS/MS analyses. Jointly, our findings indicate that the CAM tissue of an oviparous species is capable of eicosanoid synthesis, which expands our knowledge of placental evolution and introduces the possibility of future comparative models of placental function.
Collapse
Affiliation(s)
- Theresa M Cantu
- Medical University of South Carolina, Department of Obstetrics and Gynecology, 331 Fort Johnson Road, Charleston, SC 29412, United States; Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States.
| | - John A Bowden
- National Institute of Standards and Technology, Chemical Sciences Division, Environmental Chemical Sciences Group, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States
| | - Jacob Scott
- Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States
| | - Jimena B Pérez-Viscasillas
- Grice Marine Laboratory, College of Charleston, 205 Fort Johnson Rd, Charleston, SC 29412, United States
| | - Kevin Huncik
- National Institute of Standards and Technology, Chemical Sciences Division, Environmental Chemical Sciences Group, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States
| | - Matthew P Guillette
- Medical University of South Carolina, Department of Obstetrics and Gynecology, 331 Fort Johnson Road, Charleston, SC 29412, United States; Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States
| | - Louis J Guillette
- Medical University of South Carolina, Department of Obstetrics and Gynecology, 331 Fort Johnson Road, Charleston, SC 29412, United States; Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States
| |
Collapse
|
5
|
Altmäe S, Martínez-Conejero JA, Salumets A, Simón C, Horcajadas JA, Stavreus-Evers A. Endometrial gene expression analysis at the time of embryo implantation in women with unexplained infertility. Mol Hum Reprod 2009; 16:178-87. [PMID: 19933690 DOI: 10.1093/molehr/gap102] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Successful embryo implantation depends on the quality of the embryo, as well as on the receptivity of the endometrium. The aim of this study was to investigate the endometrial gene expression profile in women with unexplained infertility in comparison with fertile controls at the time of embryo implantation in order to find potential predictive markers of uterine receptivity and to identify the molecular mechanisms of infertility. High-density oligonucleotide gene arrays, comprising 44 000 gene targets, were used to define the endometrial gene expression profile in infertile (n = 4) and fertile (n = 5) women during the mid-secretory phase (day LH + 7). Microarray results were validated using real-time PCR. Analyses of expression data were carried out using non-parametric methods. Hierarchical clustering and principal component analysis showed a clear distinction in endometrial gene expression between infertile and fertile women. In total we identified 145 significantly (>3-fold change) up-regulated and 115 down-regulated genes in infertile women versus controls. Via Database for Annotation, Visualization and Integrated Discovery functional analysis we detected a substantial number of dysregulated genes in the endometria of infertile women, involved in cellular localization (21.1%) and transport (18.8%) and transporter activity (13.1%) and with major localization in extracellular regions (19.2%). Ingenuity Pathways Analysis of the gene list showed dysregulation of gene pathways involved in leukocyte extravasation signalling, lipid metabolism and detoxification in the endometria of infertile women. In conclusion, endometrial gene expression in women with unexplained infertility at the time of embryo implantation is markedly different from that in fertile women. These results provide new information on genes and pathways that may have functional significance as regards to endometrial receptivity and subsequent embryo implantation.
Collapse
Affiliation(s)
- S Altmäe
- Division of Obstetrics and Gynecology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | | | | | | | | | | |
Collapse
|
6
|
Brant KA, Caruso RL. PCB 50 stimulates release of arachidonic acid and prostaglandins from late gestation rat amnion fibroblast cells. Reprod Toxicol 2006; 22:591-8. [PMID: 16713698 DOI: 10.1016/j.reprotox.2006.04.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2005] [Revised: 04/10/2006] [Accepted: 04/14/2006] [Indexed: 10/24/2022]
Abstract
Amniotic phospholipase A2 activity contributes to elevated levels of arachidonic acid and prostaglandins observed during labor. Polychlorinated biphenyls (PCBs) activate PLA2 and have been associated with shortened gestation length. To determine if PCBs stimulate amniotic PLA2, cell cultures of rat amnion fibroblasts (RAF) were established from gestation day (gd) 20 rats and labeled with 0.5 micro Ci [3H]-arachidonic acid prior to a 0.5- or 4-h exposure to 0.1% DMSO (solvent control), PCB 50 (1-50 micro M) or TNFalpha (positive control). PCB 50 and TNFalpha induced significant release of [3H]-arachidonic acid from amnion fibroblast cells in time-dependent manners (p<0.001), an effect associated with a significant increase in iPLA2 expression (p<0.05). PCB 50 also stimulated prostaglandin production from RAF cells independent of changes in immunoreactive COX-2. These data suggest that amnion may serve as a target for PCB-induced release of arachidonic acid and uterotonic prostaglandins, with a potential for adverse pregnancy outcomes.
Collapse
Affiliation(s)
- Kelly A Brant
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI 48109-2029, USA.
| | | |
Collapse
|
7
|
Brant K, Guan W, Tithof P, Caruso RL. Gestation age-related increase in 50-kDa rat uterine calcium-independent phospholipase A2 expression influences uterine sensitivity to polychlorinated biphenyl stimulation. Biol Reprod 2006; 74:874-80. [PMID: 16436530 DOI: 10.1095/biolreprod.105.047084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Phospholipase A2 (PLA2) enzymes catalyze the rate-limiting step in eicosanoid production by liberating arachidonic acid from membrane phospholipids. There is limited information regarding the expression pattern and activity of uterine PLA2 enzymes during pregnancy. Polychlorinated biphenyls (PCBs) are a group of persistent environmental toxicants previously associated with decreased gestation length that are capable of activating PLA2. The purpose of the present study was to determine whether uterine sensitivity to PCB stimulation is dependent on PLA2 expression, comparing rat uterine PLA2 expression in Gestational Day (gd) 10 versus gd20. Western blot analysis revealed a significant increase in the expression of calcium-dependent PLA2G2A and a 50-kDa protein immunoreactive to calcium-independent PLA2G6 antibody in gd20 compared to gd10 rat uterine tissue. The increased expression of the 50-kDa PLA2G6 was associated with a gestational age-related increase in endometrial calcium-independent PLA2 activity that was sensitive to inhibition by bromoenol lactone (P < 0.05). Longitudinal uterine strips isolated from gd10 or gd20 rat were suspended in muscle baths to evaluate uterine contractions following exposure to the ortho substituted congener PCB 50. Exposure to 50 and 100 microM PCB 50 significantly increased the frequency of gd20, but not gd10, uteri compared to solvent (dimethyl sulfoxide) controls (P < 0.05). Pharmacologic inhibition of PLA2G6, but not PLA2G2A, attenuated PCB-induced stimulation of gd20 uterine contractions (P < 0.05). These data suggest that PCB 50 stimulates uterine contractions by activating endometrial PLA2G6. Furthermore, gestation age-related sensitivity to PCB is associated with an increase in the expression of a previously unidentified 50-kDa PLA2G6 in rat uterus.
Collapse
Affiliation(s)
- Kelly Brant
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109-2029, USA.
| | | | | | | |
Collapse
|
8
|
Boström M, Alexson SEH, Lundgren B, Nelson BD, DePierre JW. The expression of cytosolic and mitochondrial type II acyl-CoA thioesterases is upregulated in the porcine corpus luteum during pregnancy. Prostaglandins Leukot Essent Fatty Acids 2004; 71:319-27. [PMID: 15380819 DOI: 10.1016/j.plefa.2004.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2003] [Accepted: 04/22/2004] [Indexed: 11/29/2022]
Abstract
Acyl-CoA thioesterases hydrolyze acyl-CoAs to free fatty acids and CoASH, thereby regulating fatty acid metabolism. This activity is catalyzed by numerous structurally related and unrelated enzymes, of which several acyl-CoA thioesterases have been shown to be regulated via the peroxisome proliferator-activated receptor alpha, strongly linking them to fatty acid metabolism. Two protein families have recently been characterized, the type I acyl-CoA thioesterase gene family and the type II protein family, which are expressed in cytosol, mitochondria and peroxisomes. Still, only little is known about regulation of their expression and precise functions in vivo. In the present study, we have investigated the activity and expression of acyl-CoA thioesterase in the porcine ovary during different phases of the estrus cycle. The activity was low in homogenates obtained during the immature and follicular phases, increasing nearly 4-fold during the luteal phase, with the highest activity being found in the pregnant corpus luteum (about 7-fold higher than in immature follicles). The increase in homogenate activity in corpus luteum from pregnant pigs was due to a moderate increase in the cytosolic activity, and an approximately 20-25-fold increase in the mitochondrial fraction. Western blot analysis showed no detectable expression of the type I acyl-CoA thioesterases (CTE-I and MTE-I) and revealed that the increased activity in cytosol and mitochondria is due to increased expression of the type II acyl-CoA thioesterases (CTE-II and MTE-II). This apparent hormonal regulation of expression of the type II acyl-CoA thioesterase may provide new insights into the functions of these enzymes in the mammalian ovary.
Collapse
Affiliation(s)
- Malin Boström
- Arrhenius Laboratories for the Natural Sciences, Unit of Biochemical Toxicology, Department of Biochemistry and Biophysics, Stockholm University, S-106 91 Stockholm, Sweden.
| | | | | | | | | |
Collapse
|
9
|
Jorritsma R, de Groot MW, Vos PLAM, Kruip TAM, Wensing T, Noordhuizen JPTM. Acute fasting in heifers as a model for assessing the relationship between plasma and follicular fluid NEFA concentrations. Theriogenology 2003; 60:151-61. [PMID: 12620588 DOI: 10.1016/s0093-691x(02)01358-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It is known from epidemiological studies that negative energy balance in early lactating dairy cows is related to a depression in reproductive performance. Elevated plasma concentrations of non-esterified fatty acids (NEFA) are a typical metabolic characteristic of these animals and are proposed as the possible link. The suggestion is that NEFA might have a direct effect on the ovary, by affecting development of the oocyte or the granulosa cells. However, no data is available concerning the relationship between the concentration of NEFA in follicular fluid and plasma. Therefore, a cross-over study with 10 heifers around 15 months of age was conducted to analyze this relationship and examine the suggested effects of the negative energy balance on follicular growth. Investigation of these effects was performed on fasted heifers. The experimental treatment consisted of feeding hay with a subsequent period of fasting, to induce elevated plasma NEFA concentrations. Sampling of follicular fluid was performed using transvaginal aspiration of follicles, which were standardized using a synchronization protocol. In addition, concentrations of glucose, insulin, NEFA, and estradiol were measured in plasma. Follicular estradiol and progesterone concentrations were also measured to assess the quality of the dominant follicle. Fasting resulted in significantly lower plasma glucose (P=0.0006) and plasma insulin (P<0.0001) concentrations, higher plasma estradiol (P=0.008) and higher NEFA (P<0.001) concentrations, and smaller follicles (P=0.04) with lower estradiol:progesterone (E/P) ratios (P=0.05). Concentrations of NEFA in follicular fluid and plasma were closely related. Given this close relationship, we concluded that the presence of high plasma NEFA concentrations might link energy metabolism in early lactation with fertility.
Collapse
Affiliation(s)
- R Jorritsma
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
| | | | | | | | | | | |
Collapse
|
10
|
Ishii Y, Sakamoto K. Suppression of protein kinase C signaling by the novel isoform for bovine PGF(2alpha) receptor. Biochem Biophys Res Commun 2001; 285:1-8. [PMID: 11437363 DOI: 10.1006/bbrc.2001.5106] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A cDNA clone for a novel isoform of prostaglandin (PG) F(2alpha) receptor (FP) was isolated from the cDNA pool of the bovine corpus luteum. The sequence analysis revealed that the new FP isoform (FP(a)) encodes a 295-amino acid protein carrying a specific 28-amino acid sequence from the middle of transmembrane segment VI to the carboxyl terminus. Because only one copy gene has been identified for FP, FP(a) was generated by alternative mRNA splicing at the middle of the VI transmembrane region, resulting in the lack of a VII transmembrane segment and an intracellular carboxyl tail. The RT-PCR analysis for FP and FP(a) indicated that both mRNAs are expressed similarly during the estrous cycle and pregnancy. The PGF(2alpha) stimulation drastically enhanced protein kinase C (PKC) activity in the COS-7 cell transfected with FP, whereas no PKC activation was detected in FP(a)-transfected cells. Cotransfection of an excess amount of FP(a) markedly reduced FP-mediated PKC activity, suggesting that the novel FP isoform might play a role as a negative regulator to attenuate normal FP function.
Collapse
Affiliation(s)
- Y Ishii
- Institute of Biological Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8572, Japan
| | | |
Collapse
|
11
|
Sorbera LA, Asturiano JF, Carrillo M, Zanuy S. Effects of polyunsaturated fatty acids and prostaglandins on oocyte maturation in a marine teleost, the European sea bass (Dicentrarchus labrax). Biol Reprod 2001; 64:382-9. [PMID: 11133697 DOI: 10.1095/biolreprod64.1.382] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The effects of the polyunsaturated fatty acids (PUFAs), arachidonic acid (AA), eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and prostaglandins (PGs) on oocyte maturation were investigated in a marine teleost, the sea bass (Dicentrarchus labrax). Follicle-enclosed postvitellogenic, preovulatory oocytes were cultured in vitro and maturation was verified by assessing volume increase, lipid droplet coalescence, yolk clarification, and germinal vesicle migration and breakdown. Human chorionic gonadotropin was administered as the maturation-inducing gonadotropin (GTH) and was capable of inducing maturation in a time- and dose-dependent manner. Free AA induced maturation in a dose- and time-dependent manner and enhanced GTH-induced maturation, while EPA, DHA, and oleic acid were ineffective. Maturation induced by GTH was significantly suppressed by a phospholipase A(2) blocker, suggesting that mobilization of AA was involved in GTH-induced maturation. Moreover, EPA and DHA exhibited a significant, dose-dependent attenuation of GTH-induced maturation. Maturation induced by GTH was inhibited in the presence of a cyclooxygenase inhibitor, indomethacin, and this inhibition was reversed by addition of AA, PGE(2), or PGF(2alpha). PGE(2) and PGF(2alpha) alone were both effective stimulators of maturation, while PGE(1) and PGE(3) were ineffective. The effect of PUFAs on oocyte maturation in vitro were corroborated with studies in vivo. Oocytes were obtained from females fed a commercial, PUFA-enriched diet (RD) and maturational behavior was compared with oocytes from females fed a natural diet (ND) with a higher EPA content and n-3:n-6 ratio. Although no significant difference was observed in the rate of spontaneous oocyte maturation, a higher percentage of GTH-induced maturation and lower percentage of atresia were observed in RD oocytes. Moreover, while basal PGE production from oocytes from both groups was the same, RD oocytes produced significantly higher levels of PGE in the presence of hCG. The results from this study provide evidence for the participation of AA metabolism in GTH-induced oocyte maturation, and suggest that other PUFAs and PGs may play important roles in the induction of maturation in a marine teleost.
Collapse
Affiliation(s)
- L A Sorbera
- Instituto de Acuicultura (Consejo Superior de Investigaciones Científicas), Torre de la Sal, 12595 Castellón, Spain
| | | | | | | |
Collapse
|
12
|
Arnold DR, Binelli M, Vonk J, Alexenko AP, Drost M, Wilcox CJ, Thatcher WW. Intracellular regulation of endometrial PGF(2a) and PGE(2) production in dairy cows during early pregnancy and following treatment with recombinant interferon-tau. Domest Anim Endocrinol 2000; 18:199-216. [PMID: 10764976 DOI: 10.1016/s0739-7240(99)00079-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Objectives were to examine how the conceptus and recombinant bovine interferon-tau (rbIFN-tau) regulate intracellular components of the PGF(2a) synthetic pathway and to determine if arachidonic acid (AA) is limiting in endometrial tissue of pregnant cows. In Experiment 1, uteri were collected from either cyclic or pregnant dairy cows on Day 17 post-estrus. Intercaruncular explants were dissected and incubated for 60 min to quantify PGF(2a) production in response to oxytocin (10(-6) M), A23187 (10(-5) M), melittin (10(-5) M), and phorbol 12, 13 dibutyrate (PDBu, 10(-6) M). Additional explants from the same cows were incubated for 24 h with and without AA. Oxytocin and A23187 did not stimulate PGF(2a) in explants from either cyclic or pregnant cows. Both PDBu, melittin, and A23187 + melittin stimulated PGF(2a) production in explants of cyclic cows, but not in explants of pregnant cows. The addition of AA to explant cultures for 24 hr did not increase PGF(2a) production during a subsequent 60-min incubation. In Experiment 2, explants were collected from cows that received intrauterine infusions of either BSA (1.9 mg/1.2 ml) or rbIFN-tau (0.2 mg rbIFN-tau + 1.7 mg BSA/1.2 ml) twice a day from Days 14 to 17 of the estrous cycle. Treatments of rbIFN-tau attenuated PGF(2a) secretion induced by in vitro PDBu and A23187 treatments. However, rbIFN-tau treatment in vivo had no effect on the in vitro induction of PGF(2a) secretion by melittin. IFN-tau may regulate the PGF(2a) synthetic pathway by reducing activity of PKC or PKC mediated events.
Collapse
Affiliation(s)
- D R Arnold
- Department of Dairy and Poultry Sciences, University of Florida, P.O. Box 110920, Gainesville, FL, USA.
| | | | | | | | | | | | | |
Collapse
|
13
|
Habib GM, Cuevas AA, Barrios R, Lieberman MW. Mouse leukotriene A4 hydrolase is expressed at high levels in intestinal crypt cells and splenic lymphocytes. Gene X 1999; 234:249-55. [PMID: 10395897 DOI: 10.1016/s0378-1119(99)00175-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
LTA4 hydrolase (EC 3.3.2.6) is a dual-function enzyme that is essential for the conversion of leukotriene A4 (LTA4) to leukotriene B4 (LTB4) and also possesses an aminopeptidase activity. To characterize the expression of this unusual enzyme, we have cloned the mouse LTA4 hydrolase cDNA. The deduced amino acid sequence revealed 92% identity with the human sequence. Cloning and analysis of genomic sequences of mouse LTA4 hydrolase indicated that it is a single-copy gene spanning over 40kb and containing 20 exons. LTA4 hydrolase is widely expressed, with the highest levels of expression occurring in the small intestine, followed by the spleen. In situ hybridization revealed that LTA4 hydrolase is localized in the crypt cells of the small intestine, white pulp of the spleen, bronchiolar epithelium of the lung, myocardium, adrenal cortex, epithelium of the seminal vesicles, proximal tubules and the collecting ducts of the kidney, and occasional hepatocytes. Thus the widespread distribution of LTA4 hydrolase in various cell types in the tissues suggests that LTB4 may possess biological activities other than those known at present. It is also plausible that the widespread occurrence of LTA4 hydrolase in various tissues may correspond more with its function as an aminopeptidase than its function as an LTA4 hydrolase.
Collapse
Affiliation(s)
- G M Habib
- Department of Pathology, Baylor College of Medicine, Houston, TX 77030, USA
| | | | | | | |
Collapse
|
14
|
Meier S, Trewhella MA, Fairclough RJ, Jenkin G. Changes in uterine endometrial phospholipids and fatty acids throughout the oestrous cycle and early pregnancy in the ewe. Prostaglandins Leukot Essent Fatty Acids 1997; 57:341-9. [PMID: 9384526 DOI: 10.1016/s0952-3278(97)90554-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This study examined changes in ovine endometrial phospholipids and fatty acid concentrations associated with luteolysis and the establishment of pregnancy in the ewe on days 3, 12 and 15, respectively. Results from this study indicate that endometrial lipids increased as the oestrous cycle progressed from days 3 to 12 and 15, whereas during early pregnancy, endometrial lipids decreased on day 15 of pregnancy when compared to days 3 and 12 of pregnancy. Phosphatidylcholine followed a similar pattern to that of total lipids, with an increase in phosphatidylcholine concentrations as the oestrous cycle progressed. During the early stages of pregnancy, phosphatidylcholine increased from day 3 to day 12, but then returned to previous levels by day 15 of pregnancy. Phosphatidylethanolamine increased late in the oestrous cycle, on day 15 as compared to days 3 and 12. This increase did not occur during early pregnancy, with phosphatidylethanolamine concentrations being constant from day 3 to day 15 of pregnancy. Both phosphatidylinositol and phosphatidylserine followed a similar pattern to phosphatidylethanolamine during the oestrous cycle and remained constant during early pregnancy. The fatty acid content of the major phospholipids involved in prostaglandin synthesis were examined over the range of fatty acids from C14:0 to C24:1omega9. Although changes in arachidonic acid were observed, there were no clear indications that these changes were directly related to the changes in PGF2alpha synthesis.
Collapse
Affiliation(s)
- S Meier
- Department of Physiology, Monash University, Clayton, Victoria, Australia
| | | | | | | |
Collapse
|
15
|
Jawerbaum A, Roselló Catafau J, González ET, Novaro V, Gómez G, Gelpí E, Gimeno MA. Eicosanoid production by placental and amnion tissues from control and non-insulin-dependent diabetic rats. Influence of oxytocin in the incubating medium. Prostaglandins Leukot Essent Fatty Acids 1997; 56:425-9. [PMID: 9223652 DOI: 10.1016/s0952-3278(97)90594-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Eicosanoid production by intrauterine tissues from control and neonatal-streptozotocin induced diabetic rats during late pregnancy was evaluated. In diabetic placenta the release of 6-keto-PGF1alpha was found diminished when compared to controls. In addition, LTB4 generation was increased in diabetic placenta. No alterations in the production of TXA2, PGE2, PGE1 and PGF2alpha was found when diabetic and control placenta were compared. In amnion tissue a decreased generation of 6-keto-PGF1alpha was observed in the diabetic group, but no alteration in any other eicosanoid evaluated was found. Oxytocin (5 mU/ml, in vitro), which increases prostaglandin synthesis in rabbit and human amnion tissues, did not modify eicosanoid generation in control rat amnion. In contrast, in diabetic amnion the presence of oxytocin further decreased the release of 6-keto-PGF1alpha and diminished PGE1 generation. The present results suggest that this mildly diabetic state induces alterations in eicosanoid production in intrauterine tissues, abnormalities probably enhanced during parturition, when endogenous concentrations of oxytocin are elevated.
Collapse
Affiliation(s)
- A Jawerbaum
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Consejo Nacional de Investigaciones Cientificas y Técnicas (CONICET), Buenos Aires, Argentina
| | | | | | | | | | | | | |
Collapse
|
16
|
Thatcher W, Binelli M, Burke J, Staples C, Ambrose J, Coelho S. Antiluteolytic signals between the conceptus and endometrium. Theriogenology 1997. [DOI: 10.1016/s0093-691x(96)00347-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
17
|
Jawerbaum A, Gonzalez ET, Faletti A, Novaro V, Vitullo A, Gimeno MA. Altered prostanoid production by cumulus-oocyte complexes in a rat model of non-insulin-dependent diabetes mellitus. PROSTAGLANDINS 1996; 52:209-19. [PMID: 8908621 DOI: 10.1016/s0090-6980(96)00098-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Ovulation, oocyte maturation and PGE and PGF2 alpha production by oocyte-cumulus complexes were evaluated in rats with non-insulin-dependent diabetes induced by neonatal streptozotocin. Diabetic rats had normal estrous cycles, but ovulated a lower number of oocytes at estrus. When oocytes from control and diabetic rats obtained at proestrus were matured "in vitro" during 1, 2 or 4 hours (hr) of culture, differences were not found in the percent of germinal vesicle breakdown between both experimental groups. PGE and PGF2 alpha accumulation was higher in ovulated oocyte-cumulus complexes when compared to immature or "in vitro"-matured oocyte-cumulus complexes in both normal and diabetic rats. When control and diabetic rats are compared, more PGE and PGF2 alpha accumulation was observed in immature, "in vitro"-matured and in ovulated oocyte-cumulus complexes. A lower number of oocytes ovulated and increased oocyte-cumulus complexes prostaglandin production has been observed in this mildly diabetic experimental model. These abnormalities are similar to those previously found when 10 day embryos were evaluated in non-insulin-dependent diabetic rats.
Collapse
Affiliation(s)
- A Jawerbaum
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Consejo Nacional de Investigaciones Científicas y técnicas (CONICET), Serrano, Buenos Aires, Argentina
| | | | | | | | | | | |
Collapse
|
18
|
Przylipiak A, Rabe T, Kiesel L, Przylipiak J, Klinga K, Runnebaum B. Role of leukotriene C4 in follicle-stimulating hormone (FSH) secretion in female rat pituitary. Gynecol Endocrinol 1996; 10:95-100. [PMID: 8701793 DOI: 10.3109/09513599609097898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Leukotriene C4, at doses of 0.01 and 0.1 nmol/l added to superfused cells in pulse of 4-min duration, evoked follicle-stimulating hormone (FSH) release up to 12- to 26-fold of basal secretion. Higher and lower concentrations of leukotriene C4 were not able to induce FSH secretion. Gonadotropin-releasing hormone (GnRH)-induced FSH release was reduced by 38-57% by the leukotriene receptor antagonist FPL 55712 (10 mumol/l). Moreover, we have shown that FSH release occurs parallel to leukotriene C4 synthesis in rat anterior pituitary cells. Mellitin (100 nmol/l), an activator of phospholipase A2, induced FSH and radioactivity secretion in rat anterior pituitary cells previously preincubated for 24 h with [3H]arachidonic acid (AA).
Collapse
Affiliation(s)
- A Przylipiak
- Department of Obstetrics and Gynaecology, University Women's Hospital, Heidelberg, Germany
| | | | | | | | | | | |
Collapse
|
19
|
Pohl V, Pattyn G, Berchtold M. Parvalbumin expression during developmental differentiation of the rat ovary. Differentiation 1995; 59:235-42. [PMID: 8575645 DOI: 10.1046/j.1432-0436.1995.5940235.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Parvalbumin (PV) is a high-affinity Ca(2+)-binding protein which is expressed in a limited number of vertebrates tissues and restricted to a few distinct cell types. It has been shown by biochemical methods to be present in the adult rat ovary, but cellular localizations or developmental appearance have not been described until now. This study describes the presence of PV and its transcripts, analyzed by immunohistochemistry and in situ hybridization, respectively, during the postnatal development of the rat ovary: 13 developmental stages between day 1 and day 83 were examined. In ovaries 1-16 days old, neither PV mRNA nor PV was observed in any caaaaaaaaaaaaaay. By contrast, starting from day 18 postpartum, both PV mRNA and PV were detected in low amounts, simultaneously with the onset of differentiation of secondary intestitial gland cells in the ovarian interfollicular stroma. PV and its transcripts were primarily detected in conspicuous patches of interstitial gland tissue and in the differentiated thecal cells around the large follicles, and PV appeared to be fully expressed 33 days after birth. The parallel time courses of PV mRNA and PV accumulation during developmental differentiation, and the appearance of a steroid-producing cellular phenotype as well as the strict cellular colocalization of these two features, strongly suggest involvement of PV in the steroid metabolism of these cells, as earlier proposed for the Leydig cells of the testis. According to this hypothesis, we also show that suppression of gonadotrophic hormone production by hypophysectomy of adult rats totally suppresses PV production in parallel with the disappearance of the morphological features typical of steroid-producing cells in the remaining interstitial tissue of the ovary.
Collapse
Affiliation(s)
- V Pohl
- Laboratoire de'Histologie, Université Libre de Bruxelles, Belgium
| | | | | |
Collapse
|
20
|
Nunez EA, Haourigui M, Martin ME, Benassayag C. Fatty acids and steroid hormone action. Prostaglandins Leukot Essent Fatty Acids 1995; 52:185-90. [PMID: 7540305 DOI: 10.1016/0952-3278(95)90020-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- E A Nunez
- Laboratoire de Biochimie Endocrinienne, Faculté de Médecine Xavier Bichat, Université Denis Diderot-Paris 7, France
| | | | | | | |
Collapse
|
21
|
Goulet JL, Snouwaert JN, Latour AM, Coffman TM, Koller BH. Altered inflammatory responses in leukotriene-deficient mice. Proc Natl Acad Sci U S A 1994; 91:12852-6. [PMID: 7809134 PMCID: PMC45538 DOI: 10.1073/pnas.91.26.12852] [Citation(s) in RCA: 161] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Leukotrienes have been implicated in the regulation of immune responses, including inflammation and immediate hypersensitivity reactions. Here, we describe the phenotypic analysis of leukotriene-deficient mice generated by inactivation of the 5-lipoxygenase (5LO) gene. These 5LO(-/-) mice were unable to synthesize detectable levels of leukotrienes and were more resistant to lethal anaphylaxis induced by platelet-activating factor. The intensity of an acute inflammatory response induced by arachidonic acid was similar in 5LO(-/-) mice and controls. However, the response in 5LO(-/-) mice, but not in controls, could be virtually eliminated by a cyclooxygenase inhibitor. These data suggest that inflammatory responses are modulated by arachidonic acid metabolites through a variety of interconnected mechanisms. This has important implications for understanding the early events of an inflammatory response and for designing drugs for use in therapeutic intervention.
Collapse
Affiliation(s)
- J L Goulet
- Department of Medicine, University of North Carolina, Chapel Hill 27599-7020
| | | | | | | | | |
Collapse
|