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Tran-Guzman A, Khan A, Culty M. Differential roles of cyclooxygenase enzymes in the regulation of murine juvenile undifferentiated spermatogonia. Andrology 2024; 12:899-917. [PMID: 37772683 DOI: 10.1111/andr.13537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 08/15/2023] [Accepted: 09/10/2023] [Indexed: 09/30/2023]
Abstract
BACKGROUND Acetaminophen and ibuprofen are widely administered to babies due to their presumed safety as over-the-counter drugs. However, no reports exist on the effects of cyclooxygenase inhibitors on undifferentiated spermatogonia and spermatogonial stem cells. Infancy represents a critical period for spermatogonial stem cell formation and disrupting spermatogonial stem cells or their precursors may be associated with infertility and testicular cancer formation. OBJECTIVES The goal of this study was to examine the molecular and functional impact of cyclooxygenase inhibition and silencing on early steps of undifferentiated spermatogonia (u spg) and spermatogonial stem cell development, to assess the potential reproductive risk of pharmaceutical cyclooxygenase inhibitors. METHODS The effects of cyclooxygenase inhibition were assessed using the mouse C18-4 undifferentiated juvenile spermatogonial cell line model, previously shown to include cells with spermatogonial stem cell features, by measuring prostaglandins, cell proliferation, and differentiation, using cyclooxygenase 1- and cyclooxygenase 2-selective inhibitors NS398, celecoxib, and FR122047, acetaminophen, and ibuprofen. Cyclooxygenase 1 gene silencing was achieved using a stable short-hairpin RNA approach and clone selection, then assessing gene and protein expression in RNA sequencing, quantitative real-time polymerase chain reaction, and immunofluorescence studies. RESULTS Cyclooxygenase 2 inhibitors NS398 and celecoxib, as well as acetaminophen, but not ibuprofen, dose-dependently decreased retinoic acid-induced expression of the spg differentiation gene Stra8, while NS398 decreased the spg differentiation marker Kit, suggesting that cyclooxygenase 2 is positively associated with spg differentiation. In contrast, short-hairpin RNA-based cyclooxygenase 1 silencing in C18-4 cells altered cellular morphology and upregulated Stra8 and Kit, implying that cyclooxygenase 1 prevented spg differentiation. Furthermore, RNA sequencing analysis of cyclooxygenase 1 knockdown cells indicated the activation of several signaling pathways including the TGFb, Wnt, and Notch pathways, compared to control C18-4 cells. Notch pathway genes were upregulated by selective cyclooxygenase inhibitors, acetaminophen and ibuprofen. CONCLUSION We report that cyclooxygenase 1 and 2 differentially regulate undifferentiated spermatogonia/spermatogonial stem cell differentiation. Cyclooxygenases regulate Notch3 expression, with the Notch pathway targeted by PGD2. These data suggest an interaction between the eicosanoid and Notch signaling pathways that may be critical for the development of spermatogonial stem cells and subsequent spermatogenesis, cautioning about using cyclooxygenase inhibitors in infants.
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Affiliation(s)
- Amy Tran-Guzman
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, California, USA
| | - Amina Khan
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, California, USA
| | - Martine Culty
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, California, USA
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Podgrajsek R, Ban Frangez H, Stimpfel M. Molecular Mechanism of Resveratrol and Its Therapeutic Potential on Female Infertility. Int J Mol Sci 2024; 25:3613. [PMID: 38612425 PMCID: PMC11011890 DOI: 10.3390/ijms25073613] [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: 02/27/2024] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024] Open
Abstract
Resveratrol is a polyphenol present in various plant sources. Studies have reported numerous potential health benefits of resveratrol, exhibiting anti-aging, anti-inflammatory, anti-microbial, and anti-carcinogenic activity. Due to the reported effects, resveratrol is also being tested in reproductive disorders, including female infertility. Numerous cellular, animal, and even human studies were performed with a focus on the effect of resveratrol on female infertility. In this review, we reviewed some of its molecular mechanisms of action and summarized animal and human studies regarding resveratrol and female infertility, with a focus on age-related infertility, polycystic ovary syndrome, and endometriosis.
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Affiliation(s)
- Rebeka Podgrajsek
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia; (R.P.); (H.B.F.)
| | - Helena Ban Frangez
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia; (R.P.); (H.B.F.)
- Medical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Martin Stimpfel
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia; (R.P.); (H.B.F.)
- Medical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
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3
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Aikawa S, Hirota Y. Roles of lipid mediators in early pregnancy events. Reprod Med Biol 2024; 23:e12597. [PMID: 39010880 PMCID: PMC11247399 DOI: 10.1002/rmb2.12597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 06/24/2024] [Indexed: 07/17/2024] Open
Abstract
Background Early pregnancy events, including embryo implantation, are critical for maintaining a healthy pregnancy and facilitating childbirth. Despite numerous signaling pathways implicated in establishing early pregnancy, a comprehensive understanding of implantation remains elusive. Methods This paper provides a comprehensive review of the current research on lipids in the context of early pregnancy, with a particular focus on feto-maternal communications. Main Findings Embryo implantation entails direct interaction between uterine tissues and embryos. Introducing embryos triggers significant changes in uterine epithelial morphology and stromal differentiation, facilitating embryo implantation through communication with uterine tissue. Studies employing genetic models and chemical compounds targeting enzymes and receptors have elucidated the crucial roles of lipid mediators-prostaglandins, lysophosphatidic acid, sphingosine-1-phosphate, and cannabinoids-in early pregnancy events. Conclusion Given the high conservation of lipid synthases and receptors across species, lipid mediators likely play pivotal roles in rodents and humans. Further investigations into lipids hold promise for developing novel diagnostic and therapeutic approaches for infertility in humans.
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Affiliation(s)
- Shizu Aikawa
- Department of Obstetrics and Gynecology Graduate School of Medicine, The University of Tokyo Tokyo Japan
| | - Yasushi Hirota
- Department of Obstetrics and Gynecology Graduate School of Medicine, The University of Tokyo Tokyo Japan
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Anamthathmakula P, Winuthayanon W. Prostaglandin-Endoperoxide Synthase 2 (PTGS2) in the Oviduct: Roles in Fertilization and Early Embryo Development. Endocrinology 2021; 162:6128831. [PMID: 33539521 PMCID: PMC7901659 DOI: 10.1210/endocr/bqab025] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Indexed: 11/19/2022]
Abstract
The mammalian oviduct is a dynamic organ where important events such as final maturation of oocytes, transport of gametes, sperm capacitation, fertilization, embryo development, and transport take place. Prostaglandin-endoperoxide synthase 2 (PTGS2), also known as cyclooxygenase 2 (COX-2), is the rate-limiting enzyme in the production of prostaglandins (PGs) and plays an essential role during early pregnancy, including ovulation, fertilization, implantation, and decidualization. Even though the maternal-embryo communication originates in the oviduct, not many studies have systemically investigated PTGS2 signaling during early development. Most of the studies investigating implantation and decidualization processes in Ptgs2-/- mice employed embryo transfer into the uterus, thereby bypassing the mammalian oviduct. Consequently, an understanding of the mechanistic action as well as the regulation of PTGS2 and derived PGs in oviductal functions is far from complete. In this review, we aim to focus on the importance of PTGS2 and associated PGs signaling in the oviduct particularly in humans, farm animals, and laboratory rodents to provide a broad perspective to guide further research in this field. Specifically, we review the role of PTGS2-derived PGs in fertilization, embryo development, and transport. We focus on the actions of ovarian steroid hormones on PTGS2 regulation in the oviduct. Understanding of cellular PTGS2 function during early embryo development and transport in the oviduct will be an important step toward a better understanding of reproduction and may have potential implication in the assisted reproductive technology.
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Affiliation(s)
- Prashanth Anamthathmakula
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA
- Correspondence: Wipawee Winuthayanon, PhD, BSN,Washington State University, Pullman, WA 99164, USA. E-mail: ; and Prashanth Anamthathmakula, PhD, Washington State University, Pullman, WA 99164, USA. E-mail:
| | - Wipawee Winuthayanon
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA
- Correspondence: Wipawee Winuthayanon, PhD, BSN,Washington State University, Pullman, WA 99164, USA. E-mail: ; and Prashanth Anamthathmakula, PhD, Washington State University, Pullman, WA 99164, USA. E-mail:
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Cheng J, Li Y, Zhang Y, Wang X, Sun F, Liu Y. Conditional deletion of Wntless in granulosa cells causes impaired corpora lutea formation and subfertility. Aging (Albany NY) 2020; 13:1001-1016. [PMID: 33291079 PMCID: PMC7835029 DOI: 10.18632/aging.202222] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/09/2020] [Indexed: 12/14/2022]
Abstract
WNT proteins are widely expressed in the murine ovaries. WNTLESS is a regulator essential for all WNTs secretion. However, the complexity and overlapping expression of WNT signaling cascades have prevented researchers from elucidating their function in the ovary. Therefore, to determine the overall effect of WNT on ovarian development, we depleted the Wntless gene in oocytes and granulosa cells. Our results indicated no apparent defect in fertility in oocyte-specific Wntless knockout mice. However, granulosa cell (GC) specific Wntless deletion mice were subfertile and recurred miscarriages. Further analysis found that GC-specific Wntless knockout mice had noticeably smaller corpus luteum (CL) in the ovaries than control mice, which is consistent with a significant reduction in luteal cell marker gene expression and a noticeable increase in apoptotic gene expression. Also, the deletion of Wntless in GCs led to a significant decrease in ovarian HCGR and β-Catenin protein levels. In conclusion, Wntless deficient oocytes had no discernible impact on mouse fertility. In contrast, the loss of Wntless in GCs caused subfertility and impaired CL formation due to reduced LHCGR and β-Catenin protein levels, triggering GC apoptosis.
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Affiliation(s)
- Jinmei Cheng
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China.,Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Ningxia 751400, China
| | - Yinchuan Li
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Yan Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiuxia Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Fei Sun
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Yixun Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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6
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Abstract
PURPOSE OF REVIEW To evaluate the literature on repeat use of emergency contraception and pericoital approaches to contraception. RECENT FINDINGS Women are very interested in an oral, on-demand contraceptive option, were one available. Ulipristal acetate and a combination of levonorgestrel (LNG) and meloxicam (a cyclo-oxygenase-2 inhibitor) both appear to be more effective at disrupting ovulation than LNG alone. Recent advisories from the United Kingdom regarding daily dosing of ulipristal for fibroids emphasize the need for more safety data. SUMMARY Repeat pericoital dosing of 1.5-mg LNG is approximately as effective as other on-demand contraceptive methods and is overall very safe. The most common side effect is irregular bleeding. Repeat on-demand ulipristal acetate or meloxicam/other cyclo-oxygenase-2 inhibitors have potential as an on-demand option either alone or in combination but have not been evaluated for contraceptive efficacy in a large-scale study. Given the high unmet need for contraception, even among women with access to available options, there is a distinct need for options that address needs of women who are interested in an on-demand option. On-demand oral contraception has the potential to expand the convenience of contraceptive options and overall contraceptive use.
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7
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Traitements immunosuppresseurs et préservation de la fertilité : indications et modalités pratiques. Rev Med Interne 2018; 39:557-565. [DOI: 10.1016/j.revmed.2018.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 01/23/2018] [Accepted: 02/05/2018] [Indexed: 12/17/2022]
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8
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O'Brien CM, Herington JL, Brown N, Pence IJ, Paria BC, Slaughter JC, Reese J, Mahadevan-Jansen A. In vivo Raman spectral analysis of impaired cervical remodeling in a mouse model of delayed parturition. Sci Rep 2017; 7:6835. [PMID: 28754971 PMCID: PMC5533720 DOI: 10.1038/s41598-017-07047-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/21/2017] [Indexed: 12/01/2022] Open
Abstract
Monitoring cervical structure and composition during pregnancy has high potential for prediction of preterm birth (PTB), a problem affecting 15 million newborns annually. We use in vivo Raman spectroscopy, a label-free, light-based method that provides a molecular fingerprint to non-invasively investigate normal and impaired cervical remodeling. Prostaglandins stimulate uterine contractions and are clinically used for cervical ripening during pregnancy. Deletion of cyclooxygenase-1 (Cox-1), an enzyme involved in production of these prostaglandins, results in delayed parturition in mice. Contrary to expectation, Cox-1 null mice displayed normal uterine contractility; therefore, this study sought to determine whether cervical changes could explain the parturition differences in Cox-1 null mice and gestation-matched wild type (WT) controls. Raman spectral changes related to extracellular matrix proteins, lipids, and nucleic acids were tracked over pregnancy and found to be significantly delayed in Cox-1 null mice at term. A cervical basis for the parturition delay was confirmed by other ex vivo tests including decreased tissue distensibility, hydration, and elevated progesterone levels in the Cox-1 null mice at term. In conclusion, in vivo Raman spectroscopy non-invasively detected abnormal remodeling in the Cox-1 null mouse, and clearly demonstrated that the cervix plays a key role in their delayed parturition.
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Affiliation(s)
- Christine M O'Brien
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37232, USA.,Biophotonics Center, Vanderbilt University, Nashville, TN, 37232, USA
| | - Jennifer L Herington
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Naoko Brown
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Isaac J Pence
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37232, USA.,Biophotonics Center, Vanderbilt University, Nashville, TN, 37232, USA
| | - Bibhash C Paria
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - James C Slaughter
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Jeff Reese
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37232, USA.,Biophotonics Center, Vanderbilt University, Nashville, TN, 37232, USA.,Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, 37232, USA.,Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Anita Mahadevan-Jansen
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37232, USA. .,Biophotonics Center, Vanderbilt University, Nashville, TN, 37232, USA.
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9
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Martinović-Weigelt D, Mehinto AC, Ankley GT, Berninger JP, Collette TW, Davis JM, Denslow ND, Durhan EJ, Eid E, Ekman DR, Jensen KM, Kahl MD, LaLone CA, Teng Q, Villeneuve DL. Derivation and Evaluation of Putative Adverse Outcome Pathways for the Effects of Cyclooxygenase Inhibitors on Reproductive Processes in Female Fish. Toxicol Sci 2017; 156:344-361. [PMID: 28201806 PMCID: PMC11017233 DOI: 10.1093/toxsci/kfw257] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Cyclooxygenase (COX) inhibitors are ubiquitous in aquatic systems and have been detected in fish tissues. The exposure of fish to these pharmaceuticals is concerning because COX inhibitors disrupt the synthesis of prostaglandins (PGs), which modulate a variety of essential biological functions, including reproduction. In this study, we investigated the effects of well-characterized mammalian COX inhibitors on female fathead minnow reproductive health. Fish (n = 8) were exposed for 96 h to water containing indomethacin (IN; 100 µg/l), ibuprofen (IB; 200 µg/l) or celecoxib (CX; 20 µg/l), and evaluated for effects on liver metabolome and ovarian gene expression. Metabolomic profiles of IN, IB and CX were not significantly different from control or one another. Exposure to IB and CX resulted in differential expression of comparable numbers of genes (IB = 433, CX = 545). In contrast, 2558 genes were differentially expressed in IN-treated fish. Functional analyses (canonical pathway and gene set enrichment) indicated extensive effects of IN on PG synthesis pathway, oocyte meiosis, and several other processes consistent with physiological roles of PGs. Transcriptomic data were congruent with PG data; IN-reduced plasma PG F2α concentration, whereas IB and CX did not. Five putative AOPs were developed linking the assumed molecular initiating event of COX inhibition, with PG reduction and the adverse outcome of reproductive failure via reduction of: (1) ovulation, (2) reproductive behaviors mediated by exogenous or endogenous PGs, and (3) oocyte maturation in fish. These pathways were developed using, in part, empirical data from the present study and other publicly available data.
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Affiliation(s)
| | - Alvine C. Mehinto
- University of Florida, Gainesville, FL, 32611
- Southern California Coastal Water Research Project, Costa Mesa, CA, 92626
| | - Gerald T. Ankley
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Jason P. Berninger
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Timothy W. Collette
- U.S. Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division, Athens, GA, 30605
| | - John M. Davis
- U.S. Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division, Athens, GA, 30605
| | | | - Elizabeth J. Durhan
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Evan Eid
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Drew R. Ekman
- U.S. Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division, Athens, GA, 30605
| | - Kathleen M. Jensen
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Mike D. Kahl
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Carlie A. LaLone
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
| | - Quincy Teng
- U.S. Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division, Athens, GA, 30605
| | - Daniel L. Villeneuve
- U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, MN, 55804
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Demiral İ, Doğan M, Baştu E, Buyru F. Genomic, proteomic and lipidomic evaluation of endometrial receptivity. Turk J Obstet Gynecol 2015; 12:237-243. [PMID: 28913076 PMCID: PMC5588478 DOI: 10.4274/tjod.98475] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 01/02/2015] [Indexed: 01/11/2023] Open
Abstract
Endometrial receptivity is a complex phenomenon that plays a vital role in infertility. Although quality of embryo can be evaluated for a successful implantation, endometrial receptivity is still an unknown factor. With advances in technology, the microarray approach has provided an 'omic' tool to evaluate endometrial receptivity. In Latin, 'omic' means the whole family. The genomic, proteomic, and lipidomic evaluations of endometrium mean a wholesome evaluation of the genes, lipids and proteins of the endometrium. Evaluation of receptivity with this three-way approach may provide insight to the potential markers of implantation. Genomic analysis has been limited to date because not every gene alteration affects protein expression. Lipidomic analysis has recently gained popularity because lipids are strictly controlled during the implantation period. In summary, with the recent advances in microarray technology, genomic, lipidomic, and proteomic analyses of the endometrium may provide 'optimal' evaluation tools and criteria to assess receptivity in the near future.
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Affiliation(s)
- İrem Demiral
- İstanbul University Faculty of Medicine, Department of Obstetrics and Gynecology, İstanbul, Turkey
| | - Murat Doğan
- Acıbadem Fulya Hospital, Division of Reproductive Endocrinology and Infertility, İstanbul, Turkey
| | - Ercan Baştu
- İstanbul University Faculty of Medicine, Department of Obstetrics and Gynecology, İstanbul, Turkey
| | - Faruk Buyru
- İstanbul University Faculty of Medicine, Department of Obstetrics and Gynecology, İstanbul, Turkey
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Effects of SC-560 in combination with cisplatin or taxol on angiogenesis in human ovarian cancer xenografts. Int J Mol Sci 2014; 15:19265-80. [PMID: 25342321 PMCID: PMC4227273 DOI: 10.3390/ijms151019265] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 10/10/2014] [Accepted: 10/16/2014] [Indexed: 12/04/2022] Open
Abstract
This study was designed to evaluate the effect of cyclooxygenase-1 (COX-1) inhibitor, SC-560, combined with cisplatin or taxol, on angiogenesis in human ovarian cancer xenografts. Mice were treated with intraperitoneal (i.p.) injections of SC-560 6 mg/kg/day, i.p. injections of cisplatin 3 mg/kg every other day and i.p. injections of taxol 20 mg/kg once a week for 21 days. Vascular endothelial growth factor (VEGF) mRNA levels were detected by reverse transcription-polymerase chain reaction (RT-PCR); microvessel density (MVD) was determined by immunohistochemistry; and prostaglandin E2 (PGE2) levels were determined using ELISA. Expression levels of VEGF mRNA and MVD in treatment groups were inhibited significantly when compared with the control group (p < 0.05 for all), and SC-560 combined with cisplatin displayed a greater reduction in the expression of VEGF and MVD than SC-560 or cisplatin alone (p < 0.05). SC-560 combined with taxol showed a greater inhibition on VEGF mRNA expression than SC-560 or taxol alone (p < 0.05). The level of PGE2 in treatment groups was significantly reduced when compared with the control group (p < 0.01 for all). These findings may indicate that cisplatin or taxol supplemented by SC-560 in human ovarian cancer xenografts enhances the inhibition effect of cisplatin or taxol alone on angiogenesis.
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Egea RR, Puchalt NG, Escrivá MM, Varghese AC. OMICS: Current and future perspectives in reproductive medicine and technology. J Hum Reprod Sci 2014; 7:73-92. [PMID: 25191020 PMCID: PMC4150148 DOI: 10.4103/0974-1208.138857] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/14/2014] [Accepted: 02/26/2014] [Indexed: 12/16/2022] Open
Abstract
Many couples present fertility problems at their reproductive age, and although in the last years, the efficiency of assisted reproduction techniques has increased, these are still far from being 100% effective. A key issue in this field is the proper assessment of germ cells, embryos and endometrium quality, in order to determine the actual likelihood to succeed. Currently available analysis is mainly based on morphological features of oocytes, sperm and embryos and although these strategies have improved the results, there is an urgent need of new diagnostic and therapeutic tools. The emergence of the - OMICS technologies (epigenomics, genomics, transcriptomics, proteomics and metabolomics) permitted the improvement on the knowledge in this field, by providing with a huge amount of information regarding the biological processes involved in reproductive success, thereby getting a broader view of complex biological systems with a relatively low cost and effort.
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Affiliation(s)
- Rocío Rivera Egea
- Andrology Laboratory and Semen Bank, Instituto Universitario, IVI Valencia, Spain
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13
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Daikoku T, Terakawa J, Hossain MM, Yoshie M, Cappelletti M, Yang P, Ellenson LH, Dey SK. Mammalian target of rapamycin complex 1 and cyclooxygenase 2 pathways cooperatively exacerbate endometrial cancer. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 184:2390-402. [PMID: 25058027 DOI: 10.1016/j.ajpath.2014.05.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 05/20/2014] [Accepted: 05/28/2014] [Indexed: 11/25/2022]
Abstract
The underlying causes of endometrial cancer (EMC) are poorly understood, and treatment options for patients with advanced stages of the disease are limited. Mutations in the phosphatase and tensin homologue gene are frequently detected in EMC. Cyclooxygenase 2 (Cox2) and mammalian target of rapamycin complex 1 (mTORC1) are known downstream targets of the phosphatase and tensin homologue protein, and their activities are up-regulated in EMC. However, it is not clear whether Cox2 and mTORC1 are crucial players in cancer progression or whether they work in parallel or cooperatively. In this study, we used a Cox2 inhibitor, celecoxib, and an mTORC1 inhibitor, rapamycin, in mouse models of EMC and in human EMC cell lines to explore the interactive roles of Cox2 and mTORC1 signaling. We found that a combined treatment with celecoxib and rapamycin markedly reduces EMC progression. We also observed that rapamycin reduces Cox2 expression, whereas celecoxib reduces mTORC1 activity. These results suggest that Cox2 and mTORC1 signaling is cross-regulated and cooperatively exacerbate EMC.
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Affiliation(s)
- Takiko Daikoku
- Division of Reproductive Sciences, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
| | - Jumpei Terakawa
- Division of Reproductive Sciences, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Md M Hossain
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Mikihiro Yoshie
- Division of Reproductive Sciences, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Monica Cappelletti
- Division of Molecular Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Peiying Yang
- Department of Cancer Biology, University of Texas MD Anderson Medical Cancer Center, Houston, Texas
| | - Lora H Ellenson
- Department of Pathology and Laboratory Medicine, New York Presbyterian Hospital-Weill Cornell Medical College, New York, New York
| | - Sudhansu K Dey
- Division of Reproductive Sciences, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
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Eilati E, Small CC, McGee SR, Kurrey NK, Hales DB. Anti-inflammatory effects of fish oil in ovaries of laying hens target prostaglandin pathways. Lipids Health Dis 2013; 12:152. [PMID: 24156238 PMCID: PMC3874764 DOI: 10.1186/1476-511x-12-152] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 10/18/2013] [Indexed: 12/17/2022] Open
Abstract
Background An effective way to control cancer is by prevention. Ovarian cancer is the most lethal gynecological malignancy. Progress in the treatment and prevention of ovarian cancer has been hampered due to the lack of an appropriate animal model and absence of effective chemo-prevention strategies. The domestic hens spontaneously develop ovarian adenocarcinomas that share similar histological appearance and symptoms such as ascites and metastasis with humans. There is a link between chronic inflammation and cancer. Prostaglandin E2 (PGE2) is the most pro-inflammatory ecoisanoid and one of the downstream products of two isoforms of cyclooxygenase (COX) enzymes: COX-1 and COX-2. PGE2 exerts its effects on target cells by coupling to four subtypes of receptors which have been classified as EP1-4. Fish oil is a source of omega-3 fatty acids (OM-3FAs) which may be effective in prevention of ovarian cancer. Our objective was to assess the potential impact of fish oil on expression of COX enzymes, PGE2 concentration, apoptosis and proliferation in ovaries of laying hens. Methods 48 white Leghorn hens were fed 50, 100, 175, 375 and 700 mg/kg fish oil for 21 days. The OM3-FAs and omega-6 fatty acids contents of egg yolks were determined by Gas Chromatography. Proliferation, apoptosis, COX-1, COX-2 and prostaglandin receptor subtype 4 (EP4) protein and mRNA expression and PGE2 concentration in ovaries were measured by PCNA, TUNEL, Western blot, quantitative real-time qPCR and ELISA, respectively. Results Consumption of fish oil increased the incorporation of OM-3FAs into yolks and decreased both COX-1 and COX-2 protein and mRNA expression. In correlation with COXs down-regulation, fish oil significantly reduced the concentrations of PGE2 in ovaries. EP4 protein and mRNA expression in ovaries of hens was not affected by fish oil treatment. A lower dose of fish oil increased the egg laying frequency. 175 and 700 mg/kg fish oil reduced proliferation and 700 mg/kg increased apoptosis in hen ovaries. Conclusions Our findings suggest that the lower doses of fish oil reduce inflammatory PG and may be an effective approach in preventing ovarian carcinogenesis. These findings may provide the basis for clinical trials utilizing fish oil as a dietary intervention targeting prostaglandin biosynthesis for the prevention and treatment of ovarian cancer.
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Affiliation(s)
| | | | | | | | - Dale Buchanan Hales
- Department of Physiology, Southern Illinois University Carbondale, School of Medicine, Life Science II, Room 250 (M/C 6512), 1125 Lincoln Drive, Carbondale, IL 62901, USA.
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Bloor M, Paech M. Nonsteroidal anti-inflammatory drugs during pregnancy and the initiation of lactation. Anesth Analg 2013; 116:1063-1075. [PMID: 23558845 DOI: 10.1213/ane.0b013e31828a4b54] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nonsteroidal anti-inflammatory drugs (NSAIDs) and aspirin, which are available as "over-the counter" medications in most countries, are widely used by both pregnant and lactating women. They are popular non-opioid analgesics for the treatment of pain after vaginal and operative delivery. In addition, NSAIDs are used for tocolysis in premature labor, and low-dose aspirin has a role in the prevention of preeclampsia and recurrent miscarriage in antiphospholipid syndrome. NSAIDs and aspirin may affect fertility and increase the risk of early pregnancy loss. In the second trimester their use is considered reasonably safe, but has been associated with fetal cryptorchism. In the third trimester, NSAIDs and aspirin are usually avoided because of significant fetal risks such as renal injury, oligohydramnios, constriction of the ductus arteriosus (with potential for persistent pulmonary hypertension in the newborn), necrotizing enterocolitis, and intracranial hemorrhage. Maternal administration or ingestion of most NSAIDs results in low infant exposure via breastmilk, such that both cyclooxygenase-1 and cyclooxygenase-2 inhibitors are generally considered safe, and preferable to aspirin, when breastfeeding.
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Affiliation(s)
- Melanie Bloor
- Department of Anaesthesia and Pain Medicine, King Edward MemorialHospital for Women, Subiaco, Western Australia, Australia
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16
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Gori I, Rodriguez Y, Pellegrini C, Achtari C, Hornung D, Chardonnens E, Wunder D, Fiche M, Canny GO. Augmented epithelial multidrug resistance-associated protein 4 expression in peritoneal endometriosis: regulation by lipoxin A(4). Fertil Steril 2013; 99:1965-73.e2. [PMID: 23472950 DOI: 10.1016/j.fertnstert.2013.01.146] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 01/28/2013] [Accepted: 01/29/2013] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To compare the expression of the prostaglandin (PG) E(2) transporter multidrug resistance-associated protein 4 (MRP4) in eutopic and ectopic endometrial tissue from endometriosis patients with that of control subjects and to examine whether MRP4 is regulated by the antiinflammatory lipid lipoxin A(4) (LXA(4)) in endometriotic epithelial cells. DESIGN Molecular analysis in human samples and a cell line. SETTING Two university hospitals and a private clinic. PATIENT(S) A total of 59 endometriosis patients and 32 age- and body mass index-matched control subjects undergoing laparoscopy or hysterectomy. INTERVENTION(S) Normal, eutopic, and ectopic endometrial biopsies as well as peritoneal fluid were obtained during surgery performed during the proliferative phase of the menstrual cycle. 12Z endometriotic epithelial cells were used for in vitro mechanistic studies. MAIN OUTCOME MEASURE(S) Tissue MRP4 mRNA levels were quantified by quantitative reverse-transcription polymerase chain reaction (qRT-PCR), and localization was analyzed with the use of immunohistochemistry. Cellular MRP4 mRNA and protein were quantified by qRT-PCR and Western blot, respectively. PGE(2) was measured in peritoneal fluid and cell supernatants using an enzyme immunoassay (EIA). RESULT(S) MRP4 was expressed in eutopic and ectopic endometrium, where it was overexpressed in peritoneal lesions and localized in the cytoplasm of glandular epithelial cells. LXA(4) attenuated MRP4 mRNA and protein levels in endometriotic epithelial cells in a dose-dependent manner, while not affecting the expression of enzymes involved in PGE(2) metabolism. Investigations employing receptor antagonists and small interfering RNA revealed that this occurred through estrogen receptor α. Accordingly, LXA(4) treatment inhibited extracellular PGE(2) release. CONCLUSION(S) We report for the first time that MRP4 is expressed in human endometrium, elevated in peritoneal endometriosis, and modulated by LXA(4) in endometriotic epithelial cells.
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Affiliation(s)
- Ilaria Gori
- Department of Gynecology, Obstetrics, and Medical Genetics, Lausanne University Hospital, Lausanne, Switzerland
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Eilati E, Pan L, Bahr JM, Hales DB. Age dependent increase in prostaglandin pathway coincides with onset of ovarian cancer in laying hens. Prostaglandins Leukot Essent Fatty Acids 2012; 87:177-84. [PMID: 23089186 PMCID: PMC3592969 DOI: 10.1016/j.plefa.2012.09.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 09/04/2012] [Accepted: 09/05/2012] [Indexed: 01/01/2023]
Abstract
Chronic inflammation has been linked to cancer. Prostaglandin E₂ (PGE₂) is the most pro-inflammatory lipid and one of the downstream products of 2 isoforms of cyclooxygenase (COX) enzymes: COX-1 and COX-2. Ovarian cancer is the most lethal gynecological malignancy and mainly occurs in older women. The factors that contribute to the correlation of age and ovarian cancer are unknown. The purpose of this study was to examine the expression of COX enzymes and PGE₂ levels in ovaries and correlate them to ovarian cancer and aging. White Leghorn hens aged 1, 1.5, 2, 2.5, 3 and 3.5 years were used. The incidence of ovarian cancer was determined by gross pathology and histology. COX-1 and COX-2 protein and mRNA expression and PGE₂ concentrations in ovaries were measured using Western blot, quantitative real-time PCR and ELISA, respectively. Our results indicated an increase in ovarian cancer incidence and expression of both COX enzymes in ovaries of older hens. In correlation with ovarian cancer incidence and COX enzymes expression, PGE₂ concentrations were elevated with age. Ovaries with tumor had elevated COX-1 expression and PGE₂ concentration compared to normal ovaries. Our findings suggest that the up-regulation of COX enzymes with age is the main contributing factor in the age associated increase in PGE₂. Furthermore, elevated PGE₂ in ovaries of hens concomitant with age suggests its important role in early stages of ovarian carcinogenesis. These finding may provide the basis for clinical trials utilizing COX specific inhibitors or dietary intervention targeting prostaglandin biosynthesis for the prevention and treatment of ovarian cancer.
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Affiliation(s)
- Erfan Eilati
- Department of Physiology, Southern Illinois University—Carbondale, School of Medicine, Carbondale, IL 62901, USA
| | - Lurui Pan
- Department of Physiology, Southern Illinois University—Carbondale, School of Medicine, Carbondale, IL 62901, USA
| | - Janice M. Bahr
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, 1207 W. Gregory Dr., Urbana, IL, USA
| | - Dale Buchanan Hales
- Department of Physiology, Southern Illinois University—Carbondale, School of Medicine, Carbondale, IL 62901, USA
- Correspondence to: Department of Physiology, Southern Illinois University Carbondale, School of Medicine, Life Science II, Room 250 (M/C 6512), 1125 Lincoln Drive, Carbondale, IL 62901, USA. Tel.: +1 618 453 1544; fax: +1 618 453 1517. (D.B. Hales)
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Li W, Xu XL, Zhang J, Cai JH, Tang YX. Effects of cyclooxygenase inhibitors on survival time in ovarian cancer xenograft-bearing mice. Oncol Lett 2012. [PMID: 23205124 DOI: 10.3892/ol.2012.929] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The present study was designed to investigate whether cyclooxygenase (COX) inhibitors (coxibs) could prolong survival time by attenuating the tumor growth of ovarian cancer xenograft-bearing mice. Tumor growth and survival time were observed and compared in mice which were treated with a COX-1 inhibitor (SC-560) and a COX-2 inhibitor (celecoxib) every other day for a 21 day period from the day of tumor formation. The trial lasted a total of 121 days. The combination therapy resulted in statistically significant inhibition of tumor size compared with the control group (P<0.05). Additionally, single treatment of SC-560 or celecoxib significantly prolonged the mean survival time of mice compared with the control group (P<0.05). We suggest that COX-1 and COX-2 inhibitors may improve survival and inhibit tumor growth, and that the tumor growth inhibition by coxibs may be the contributing factor for the prolonged survival time in mouse xenograft models.
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Affiliation(s)
- Wei Li
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
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19
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LI WEI, LIU MEILIN, CAI JIAHUI, TANG YUNXIAN, ZHAI LINGYUN, ZHANG JUN. Effect of the combination of a cyclooxygenase-1 selective inhibitor and taxol on proliferation, apoptosis and angiogenesis of ovarian cancer in vivo. Oncol Lett 2012; 4:168-174. [PMID: 22807982 PMCID: PMC3398363 DOI: 10.3892/ol.2012.688] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 04/13/2012] [Indexed: 11/06/2022] Open
Abstract
This study was designed to investigate the effects of a cyclooxygenase (COX)-1 inhibitor, SC-560, administered in combination with taxol, on the molecular mechanisms of antitumor efficacy in a SKOV-3 human ovarian carcinoma cell xenograft-bearing mouse model. The mice were treated with 6 mg/kg/day SC-560 by gavage twice every other day and 20 mg/kg taxol by intraperitoneal injection once a week for three weeks. Microvessel density (MVD) and vascular endothelial growth factor (VEGF) mRNA levels of ovarian cancer were detected in the tumor tissues using immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR), respectively. The index of proliferating and apoptotic cells in the tumor tissues was determined by staining for Ki-67 and using the terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) method, respectively. On day 7 after the end of administration, the tumor volume of mice in the combination group was reduced by 55.35% compared with that of the control mice, and the difference was statistically significant (P<0.05). In the combination group, the expression of VEGF, MVD and the cell proliferation index were inhibited significantly, while the apoptotic index was notably increased (all P<0.01, compared with the control group). Our results indicate that the molecular mechanisms of the antitumor efficacy of SC-560 combined with taxol therapy may act in part by inhibiting tumor angiogenesis, reducing cell proliferation and inducing cell apoptosis.
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Affiliation(s)
- WEI LI
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
| | - MEI-LIN LIU
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
| | - JIA-HUI CAI
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
| | - YUN-XIAN TANG
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
| | - LING-YUN ZHAI
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
| | - JUN ZHANG
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, Hangzhou, Zhejiang 310006, P.R. China
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20
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Ablation of cyclooxygenase-2 in forebrain neurons is neuroprotective and dampens brain inflammation after status epilepticus. J Neurosci 2011; 31:14850-60. [PMID: 22016518 DOI: 10.1523/jneurosci.3922-11.2011] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cyclooxygenase-2 (COX-2), a source of inflammatory mediators and a multifunctional neuronal modulator, is rapidly induced in select populations of cortical neurons after status epilepticus. The consequences of rapid activity-triggered induction of COX-2 in neurons have been the subject of much study and speculation. To address this issue directly, we created a mouse in which COX-2 is conditionally ablated in selected forebrain neurons. Results following pilocarpine-induced status epilepticus indicate that neuronal COX-2 promotes early neuroprotection and then delayed neurodegeneration of CA1 pyramidal neurons, promotes neurodegeneration of nearby somatostatin interneurons in the CA1 stratum oriens and dentate hilus (which themselves do not express COX-2), intensifies a broad inflammatory reaction involving numerous cytokines and other inflammatory mediators in the hippocampus, and is essential for development of a leaky blood-brain barrier after seizures. These findings point to a profound role of seizure-induced neuronal COX-2 expression in neuropathologies that accompany epileptogenesis.
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21
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Berlanga O, Bradshaw H, Vilella-Mitjana F, Garrido-Gómez T, Simón C. How endometrial secretomics can help in predicting implantation. Placenta 2011; 32 Suppl 3:S271-5. [DOI: 10.1016/j.placenta.2011.06.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 06/01/2011] [Accepted: 06/02/2011] [Indexed: 01/06/2023]
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22
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Barreiro KA, Di Yorio MP, Artillo-Guida RD, Paz DA, Faletti AG. Daily treatment with α-naphthoflavone enhances follicular growth and ovulation rate in the rat. Toxicol Appl Pharmacol 2011; 252:11-7. [DOI: 10.1016/j.taap.2011.01.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Revised: 01/12/2011] [Accepted: 01/13/2011] [Indexed: 10/18/2022]
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23
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Li W, Wang J, Jiang HR, Xu XL, Zhang J, Liu ML, Zhai LY. Combined effects of cyclooxygenase-1 and cyclooxygenase-2 selective inhibitors on ovarian carcinoma in vivo. Int J Mol Sci 2011; 12:668-81. [PMID: 21340007 PMCID: PMC3039973 DOI: 10.3390/ijms12010668] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 12/28/2010] [Accepted: 01/10/2011] [Indexed: 11/16/2022] Open
Abstract
The present study was designed to investigate the combined effects of cyclooxygenase (COX)-1 and COX-2 selective inhibitors on human ovarian SKOV-3 carcinoma cells xenograft-bearing mice. The animals were treated with 3 mg/kg SC-560 (a COX-1 selective inhibitor) alone, 25 mg/kg celecoxib (a COX-2 selective inhibitor) alone, or SC-560/celecoxib by gavage, twice a day for three weeks. To test the mechanism of inhibition of tumor growth by COX selective inhibitors, the index of proliferating cells in tumor tissues was determined by immunostaining and the index of apoptotic cells by the terminal-deoxynucleotidyl-transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) method. The inhibitory rate on tumor growth in the combination group was 35.54% which is significant statistically compared with that of the control group (P < 0.05). In the combination group, the index of cell proliferation and apoptosis were 12.40% and 51.03% respectively, which are significant statistically compared with those of the control group (22.56%, 19.07%, all P < 0.05). These studies indicate that synergism between two COX inhibitors and inhibitor combination treatment has particular potential for chemoprevention of ovarian cancer growth.
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Affiliation(s)
- Wei Li
- Department of Gynecology, Nanjing Medical University of Hangzhou Hospital, 261 Huansha Road, Hangzhou, Zhejiang 310006, China; E-Mails: (J.W.); (H.-R.J.); (X.-L.X.); (J.Z.); (M.-L.L.); (L.-Y.Z.)
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24
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Silva CA, Bonfa E, ØStensen M. Maintenance of fertility in patients with rheumatic diseases needing antiinflammatory and immunosuppressive drugs. Arthritis Care Res (Hoboken) 2010; 62:1682-90. [DOI: 10.1002/acr.20323] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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25
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Elliott AB, Chakravarty EF. Immunosuppressive Medications during Pregnancy and Lactation in Women with Autoimmune Diseases. WOMENS HEALTH 2010; 6:431-40; quiz 441-2. [DOI: 10.2217/whe.10.24] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Most autoimmune diseases predominantly affect females. Many of these diseases occur in women who have the potential to become pregnant or wish to plan a pregnancy. The potential for fetotoxic effects of immunosuppressive medications that are commonly used to treat systemic autoimmune diseases must be weighed against the need for control of disease activity during pregnancy and the postpartum period, since active disease can be an independent risk factor for adverse pregnancy outcomes. Although far from conclusive, most data concerning the safety of medications for use during pregnancy come from case series and observational studies. It is often necessary to continue treating patients throughout pregnancy and lactation in order to control the activity of the underlying disease. The aim of this paper is to review the evidence regarding the safety of the most commonly used medications in rheumatic disease during pregnancy or lactation and to enable practitioners and patients to make informed decisions regarding treatment during this period in a woman's life.
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Affiliation(s)
- Amy B Elliott
- Division of Immunology & Rheumatology, Stanford University School of Medicine, 1000 Welch Road, Suite 203, Palo Alto, CA 94304, USA
| | - Eliza F Chakravarty
- Division of Immunology & Rheumatology, Stanford University School of Medicine, 1000 Welch Road, Suite 203, Palo Alto, CA 94304, USA
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26
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Winterhager E, Grümmer R, Mavrogianis PA, Jones CJP, Hastings JM, Fazleabas AT. Connexin expression pattern in the endometrium of baboons is influenced by hormonal changes and the presence of endometriotic lesions. Mol Hum Reprod 2009; 15:645-52. [PMID: 19661121 DOI: 10.1093/molehr/gap060] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Experimentally induced endometriosis in baboons serves as an elegant model to discriminate between endometrial genes which are primarily associated with normal endometrial function and those that are changed by the presence of endometriotic lesions. Since connexin genes are characteristic of the hormonally regulated differentiation of the endometrium, we have examined connexin expression in baboon endometrium to delineate if they are altered in response to the presence of endometriotic lesions. Connexin expression in the endometrium of cycling baboons is similar to that of the human endometrium with Connexin(Cx)43 being primarily seen in the stromal compartment and Cx26 and Cx32 being present predominantly in the epithelium. Although Cx32 is up-regulated during the secretory phase, Cx26 and Cx43 are down-regulated. In the baboon model of induced endometriosis a change in connexin pattern was evident in the presence of endometriotic lesions. In the secretory phase, Cx26 and Cx32 are no longer present in the epithelium but Cx26 is now observed primarily in the stromal cells. Infusion of chorionic gonadotrophin in a manner that mimics blastocyst transit in utero failed to rescue the aberrant stromal expression of Cx26 that is associated with the presence of endometriotic lesions suggesting an impairment of the implantation process. The altered connexin pattern coupled with a loss of the channel protein in the epithelium and a gain of Cx26 in the stromal compartment suggests that the presence of lesions changes the uterine environment and thereby the differentiation programme. This aberrant expression of connexins may be an additional factor that contributes to endometriosis-associated infertility.
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Affiliation(s)
- E Winterhager
- Institute of Molecular Biology, University of Duisburg-Essen, 45122 Essen, Germany.
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27
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Cardiomyocyte cyclooxygenase-2 influences cardiac rhythm and function. Proc Natl Acad Sci U S A 2009; 106:7548-52. [PMID: 19376970 DOI: 10.1073/pnas.0805806106] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Nonsteroidal anti-inflammatory drugs selective for inhibition of COX-2 increase heart failure and elevate blood pressure. The COX-2 gene was floxed and crossed into merCremer mice under the alpha-myosin heavy-chain promoter. Tamoxifen induced selective deletion of COX-2 in cardiomyocytes depressed cardiac output, and resulted in weight loss, diminished exercise tolerance, and enhanced susceptibility to induced arrhythmogenesis. The cardiac dysfunction subsequent to pressure overload recovered progressively in the knockouts coincident with increasing cardiomyocyte hypertrophy and interstitial and perivascular fibrosis. Inhibition of COX-2 in cardiomyocytes may contribute to heart failure in patients receiving nonsteroidal anti-inflammatory drugs specific for inhibition of COX-2.
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28
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Li W, Ji ZL, Zhuo GC, Xu RJ, Wang J, Jiang HR. Effects of a selective cyclooxygenase-1 inhibitor in SKOV-3 ovarian carcinoma xenograft-bearing mice. Med Oncol 2009; 27:98-104. [PMID: 19235530 DOI: 10.1007/s12032-009-9179-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Accepted: 02/03/2009] [Indexed: 10/21/2022]
Abstract
To evaluate the effect of a cyclooxygenase-1 (COX-1) inhibitor, SC-560, on the growth inhibition of s.c. human ovarian SKOV-3 carcinoma and on angiogenesis. Human ovarian SKOV-3 carcinoma cells xenograft-bearing mice were treated with SC-560, a COX-1-selective inhibitor, 6 mg/kg alone i.g. daily, and i.p. injections of cisplatin 3 mg/kg every other day for 21 days. Prostaglandin E(2) (PGE(2)) levels were determined by ELISA. Microvessel density (MVD) of ovarian carcinoma was determined with anti-CD(34) as the label by immunohistochemistry. In addition, the expression of COX-1 at protein levels in the control group was detected by immunohistochemistry. SC-560 reduced the growth of tumors when SKOV-3 cells were xenografted in nude female mice. The inhibitory rates in SC-560 group and cisplatin group were 47.1% and 51.7%, respectively, which is significant statistically compared to that of control group (all, P < 0.05). In treatment groups, SC-560 significantly reduced intratumor PGE(2) levels (P < 0.01). MVDs in SC-560 group were 35.73 +/- 9.87, which are significant statistically compared to that of control group (74.33 +/- 9.50) (P < 0.01). COX-1, not COX-2, protein levels are elevated in tumor tissues. These findings may implicate COX-1 as a suitable target for the treatment of ovarian cancer and that antiangiogenic therapy can be used to inhibit ovarian cancer growth.
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Affiliation(s)
- Wei Li
- Department of Gynecology and Obstetrics, Nanjing Medical University of Hangzhou Hospital, Hangzhou, China.
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29
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Ishikawa TO, Jain N, Herschman HR. Feedback regulation of cyclooxygenase-2 transcription ex vivo and in vivo. Biochem Biophys Res Commun 2008; 378:534-8. [PMID: 19061862 DOI: 10.1016/j.bbrc.2008.11.099] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Accepted: 11/17/2008] [Indexed: 10/21/2022]
Abstract
Cyclooxygenase-2 (COX-2) is a rate-limiting enzyme for prostaglandin biosynthesis. Its inducible expression is regulated by complex pathways. To monitor Cox-2 transcriptional activity in vivo, we generated a knock-in mouse expressing a firefly luciferase reporter. In this study we examined, by comparing luciferase activity of Cox-2(luc/+) and Cox-2(luc/-) cells and mice, effects of prostanoid products on Cox-2 promoter transcriptional activation. In peritoneal macrophages, luciferase induction by LPS in Cox-2(luc/-) cells was less than that of Cox-2(luc/+) cells. However, in the presence of PGE(2), induction was comparable, suggesting positive Cox-2 feedback regulation by PGE(2) occurs for macrophages. In contrast, feedback modulation was not observed in TPA-induced Cox-2(luc/+) and Cox-2(luc/-) mouse embryonic fibroblasts (MEFs). Using non-invasive in vivo imaging, we observed negative feedback regulation of Cox-2 expression during paw inflammation in living mice. Our results suggest Cox-2 expression is regulated by cell type specific feedback mechanisms, both in cultured cells and in living animals.
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Affiliation(s)
- Tomo-O Ishikawa
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, 341 Boyer Hall, 611 Charles E. Young Drive East, Los Angeles, CA 90095, USA
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30
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Smith ER, Xu XX. Ovarian ageing, follicle depletion, and cancer: a hypothesis for the aetiology of epithelial ovarian cancer involving follicle depletion. Lancet Oncol 2008; 9:1108-11. [PMID: 19012860 DOI: 10.1016/s1470-2045(08)70281-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The association between ovarian cancer risk and reproductive factors has been well established, and two main theories, incessant ovulation and gonadotropin stimulation, have been proposed to explain the mechanism. Recent studies using animal models of ovarian tumorigenesis, and analysis of ovarian tissues from prophylactic oophorectomies, suggest that depletion of ovarian follicles might underlie the epidemiological findings linking reproductive history and ovarian cancer risk.
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Affiliation(s)
- Elizabeth R Smith
- Department of Medicine, University of Miami School of Medicine, Miami, FL, USA
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Li W, Xu RJ, Lin ZY, Zhuo GC, Zhang HH. Effects of a cyclooxygenase-1-selective inhibitor in a mouse model of ovarian cancer, administered alone or in combination with ibuprofen, a nonselective cyclooxygenase inhibitor. Med Oncol 2008; 26:170-7. [PMID: 18988002 DOI: 10.1007/s12032-008-9104-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2008] [Accepted: 10/01/2008] [Indexed: 10/21/2022]
Abstract
Nonsteroidal anti-inflammatory drugs (NSAIDs) are known to be potent inhibitors of the cyclooxygenases. The present study was designed to investigate the effects of a cyclooxygenase (COX)-1 inhibitor, SC-560, administered alone or in combination with ibuprofen on the growth inhibition of s.c. human ovarian SKOV-3 carcinoma and on angiogenesis. The effects of SC-560 and ibuprofen on tumor growth inhibition have been examined in mouse ovarian cancer models. Angiogenesis of both COX inhibitors was measured by reverse-transcription polymerase chain reaction (RT-PCR) and immunohistochemistry. Prostaglandin E(2) (PGE(2)) levels in tumor tissues of mice were also determined by ELISA. The inhibitory rates in SC-560 group alone and in combination with ibuprofen group were 21.21% and 41.55%, respectively. In combination therapy with SC-560 and ibuprofen, tumor volumes were significantly reduced compared with that of control group (P < 0.05). In treatment groups, both COX inhibitors significantly reduced intratumor PGE(2) levels (all P < 0.01). Microvessel density (MVD) in tumor tissues were significantly decreased from 80.90 +/- 5.14 in vehicle-treated to 40.70 +/- 10.45 and 38.90 +/- 8.41 in SC-560 group alone and combination ibuprofen therapy (all P < 0.01). Ibuprofen was similar to the cyclooxygenase-1-selective inhibitor SC-560 in its ability to suppress the values of MVD of tumor tissues. SC-560 administered alone or in combination with ibuprofen inhibited the COX-associated up-regulation of VEGF. These studies demonstrate synergism between two COX inhibitors and that antiangiogenic therapy can be used to inhibit ovarian cancer growth.
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Affiliation(s)
- Wei Li
- Department of Gynecology and Obstetrics, Nanjing Medical University of Hangzhou Hospital, 310006, Hangzhou, China.
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Sangita, Kumar A, Sharma S, Sengupta S, Singh MM, Ray S. Thiol derivatives of arylnaphthylmethane as novel anti-osteoporotic agents. MONATSHEFTE FUR CHEMIE 2008. [DOI: 10.1007/s00706-007-0848-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ulivi V, Giannoni P, Gentili C, Cancedda R, Descalzi F. p38/NF‐kB‐dependent expression of COX‐2 during differentiation and inflammatory response of chondrocytes. J Cell Biochem 2008; 104:1393-406. [DOI: 10.1002/jcb.21717] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Polydorides AD, Kalish RB, Witkin SS, Baergen RN. A fetal cyclooxygenase-2 gene polymorphism is associated with placental malperfusion. Int J Gynecol Pathol 2007; 26:284-90. [PMID: 17581413 DOI: 10.1097/01.pgp.0000236950.56785.a8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Prostaglandin levels vary during pregnancy, mostly under the control of the inducible enzyme cyclooxygenase-2 (COX-2). The expression of COX-2 has been associated with ischemic events in the heart and brain, but its direct effect on human placental perfusion has not been previously examined. The purpose of this study was to investigate whether a functional polymorphism in the COX-2 gene that controls enzyme expression levels is associated with placental histopathologic lesions. Maternal and neonatal DNA from twin gestations were analyzed by a polymerase chain reaction-based assay for a single G to C nucleotide polymorphism at position -765 in the COX-2 gene promoter. Placental histopathology was evaluated in 6 major categories: meconium, malperfusion, inflammation, umbilical cord problems, villitis, and thrombosis. There was no significant association between placental histopathologic findings and polymorphisms of the COX-2 gene in the mother. In the fetus, carriage of the COX-2 C allele, which is correlated with decreased COX-2 gene expression, was negatively associated with lesions of placental ischemia/malperfusion (P = 0.02). Placental ischemic lesions were positively associated with intrauterine growth restriction (IUGR; P < 0.001). No other group of histopathologic lesions was associated with fetal polymorphisms in the COX-2 gene or with IUGR. Thus, a fetal polymorphism in the COX-2 gene influences the occurrence of placental malperfusion and ischemia, which may be of sufficient severity to promote or allow the development of IUGR.
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Affiliation(s)
- Alexandros D Polydorides
- Department of Pathology and Laboratory Medicine, New York-Presbyterian Hospital, New York, New York, USA.
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Castro-Rendón WA, Castro-Alvarez JF, Guzmán-Martinez C, Bueno-Sanchez JC. Blastocyst-endometrium interaction: intertwining a cytokine network. Braz J Med Biol Res 2007; 39:1373-85. [PMID: 17146550 DOI: 10.1590/s0100-879x2006001100001] [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] [Received: 11/03/2005] [Accepted: 06/21/2006] [Indexed: 11/22/2022] Open
Abstract
The successful implantation of the blastocyst depends on adequate interactions between the embryo and the uterus. The development of the embryo begins with the fertilized ovum, a single totipotent cell which undergoes mitosis and gives rise to a multicellular structure named blastocyst. At the same time, increasing concentrations of ovarian steroid hormones initiate a complex signaling cascade that stimulates the differentiation of endometrial stromal cells to decidual cells, preparing the uterus to lodge the embryo. Studies in humans and in other mammals have shown that cytokines and growth factors are produced by the pre-implantation embryo and cells of the reproductive tract; however, the interactions between these factors that converge for successful implantation are not well understood. This review focuses on the actions of interleukin-1, leukemia inhibitory factor, epidermal growth factor, heparin-binding epidermal growth factor, and vascular endothelial growth factor, and on the network of their interactions leading to early embryo development, peri-implantatory endometrial changes, embryo implantation and trophoblast differentiation. We also propose therapeutical approaches based on current knowledge on cytokine interactions.
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Affiliation(s)
- W A Castro-Rendón
- Semillero de Investigación SIMBIOSIS, Universidad de Antioquia, Medellín, Colombia.
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Yang WL, Cai KQ, Smedberg JL, Smith ER, Klein-Szanto A, Hamilton TC, Xu XX. A reduction of cyclooxygenase 2 gene dosage counters the ovarian morphological aging and tumor phenotype in Wv mice. THE AMERICAN JOURNAL OF PATHOLOGY 2007; 170:1325-36. [PMID: 17392171 PMCID: PMC1829465 DOI: 10.2353/ajpath.2007.060769] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Menopausal ovaries undergo morphological changes, known as ovarian aging, which are implicated in the high incidence of ovarian cancer occurring during the perimenopausal and immediate postmenopausal periods. The germ cell-deficient Wv mice recapitulate these postmenopausal alterations in ovarian morphology and develop tubular adenomas. We demonstrate that a reduction of cyclooxygenase 2 gene dosage rescued the ovarian aging phenotype of the Wv mice, whereas homozygous deletion was accompanied by a compensatory increase in ovarian cyclooxygenase 1 expression and prostaglandin E(2) synthesis. Cyclooxygenase inhibitors also reduced the tumor phenotype in a preliminary study. These findings suggest that increased cyclooxygenase activity contributes to the preneoplastic morphological changes of the ovarian surface epithelium, which can be reversed by a reduction of gene dosage achieved by either genetic or pharmacological approaches.
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Affiliation(s)
- Wan-Lin Yang
- Ovarian Cancer and Tumor Cell Biology Programs, Fox Chase Cancer Center, 333 Cottman Ave., Philadelphia, PA 19111-2497, USA
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Yu Y, Fan J, Hui Y, Rouzer CA, Marnett LJ, Klein-Szanto AJ, FitzGerald GA, Funk CD. Targeted cyclooxygenase gene (ptgs) exchange reveals discriminant isoform functionality. J Biol Chem 2006; 282:1498-506. [PMID: 17110378 DOI: 10.1074/jbc.m609930200] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The prostaglandin G/H synthase enzymes, commonly termed COX-1 and COX-2, differ markedly in their responses to regulatory stimuli and their tissue expression patterns. COX-1 is the dominant source of "housekeeping" prostaglandins, whereas COX-2 synthesizes prostaglandins of relevance to pain, inflammation, and mitogenesis. Despite these distinctions, the two enzymes are remarkably conserved, and their subcellular distributions overlap considerably. To address the functional interchangeability of the two isozymes, mice in which COX-1 is expressed under COX-2 regulatory elements were created by a gene targeting "knock-in" strategy. In macrophages from these mice, COX-1 was shown to be lipopolysaccharide-inducible in a manner analogous to COX-2 in wild-type macrophages. However, COX-1 failed to substitute effectively for COX-2 in lipopolysaccharide-induced prostaglandin E2 synthesis at low concentrations of substrate and in the metabolism of the endocannabinoid 2-arachidonylglycerol. The marked depression of the major urinary metabolite of prostacyclin in COX-2 null mice was only partially rescued by COX-1 knock-in, whereas the main urinary metabolite of prostaglandin E2 was rescued totally. Replacement with COX-1 partially rescued the impact of COX-2 deletion on reproductive function. The renal pathology consequent to COX-2 deletion was delayed but not prevented, whereas the corresponding peritonitis was unaltered. Insertion of COX-1 under the regulatory sequences that drive COX-2 expression indicated that COX-1 can substitute for some COX-2 actions and rescue only some of the consequences of gene disruption. Manipulation of COX-2 also revealed a preference for coupling with distinct downstream prostaglandin synthases in vivo. These mice will provide a valuable reagent with which to elucidate the distinct roles of the COX enzymes in mammalian biology.
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Affiliation(s)
- Ying Yu
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Østensen M, Khamashta M, Lockshin M, Parke A, Brucato A, Carp H, Doria A, Rai R, Meroni P, Cetin I, Derksen R, Branch W, Motta M, Gordon C, Ruiz-Irastorza G, Spinillo A, Friedman D, Cimaz R, Czeizel A, Piette JC, Cervera R, Levy RA, Clementi M, De Carolis S, Petri M, Shoenfeld Y, Faden D, Valesini G, Tincani A. Anti-inflammatory and immunosuppressive drugs and reproduction. Arthritis Res Ther 2006; 8:209. [PMID: 16712713 PMCID: PMC1526635 DOI: 10.1186/ar1957] [Citation(s) in RCA: 343] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Rheumatic diseases in women of childbearing years may necessitate drug treatment during a pregnancy, to control maternal disease activity and to ensure a successful pregnancy outcome. This survey is based on a consensus workshop of international experts discussing effects of anti-inflammatory, immunosuppressive and biological drugs during pregnancy and lactation. In addition, effects of these drugs on male and female fertility and possible long-term effects on infants exposed to drugs antenatally are discussed where data were available. Recommendations for drug treatment during pregnancy and lactation are given.
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Affiliation(s)
- Monika Østensen
- Department of Rheumatology and Clinical Immunology/Allergology, University Hospital of Bern, Switzerland.
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Cheng Y, Wang M, Yu Y, Lawson J, Funk CD, FitzGerald GA. Cyclooxygenases, microsomal prostaglandin E synthase-1, and cardiovascular function. J Clin Invest 2006; 116:1391-9. [PMID: 16614756 PMCID: PMC1435722 DOI: 10.1172/jci27540] [Citation(s) in RCA: 278] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Accepted: 02/16/2006] [Indexed: 12/30/2022] Open
Abstract
We investigated the mechanisms by which inhibitors of prostaglandin G/H synthase-2 (PGHS-2; known colloquially as COX-2) increase the incidence of myocardial infarction and stroke. These inhibitors are believed to exert both their beneficial and their adverse effects by suppression of PGHS-2-derived prostacyclin (PGI(2)) and PGE(2). Therefore, the challenge remains to identify a mechanism whereby PGI(2) and PGE(2) expression can be suppressed while avoiding adverse cardiovascular events. Here, selective inhibition, knockout, or mutation of PGHS-2, or deletion of the receptor for PGHS-2-derived PGI(2), was shown to accelerate thrombogenesis and elevate blood pressure in mice. These responses were attenuated by COX-1 knock down, which mimics the beneficial effects of low-dose aspirin. PGE(2) biosynthesis is catalyzed by the coordinate actions of COX enzymes and microsomal PGE synthase-1 (mPGES-1). We show that deletion of mPGES-1 depressed PGE(2) expression, augmented PGI(2) expression, and had no effect on thromboxane biosynthesis in vivo. Most importantly, mPGES-1 deletion affected neither thrombogenesis nor blood pressure. These results suggest that inhibitors of mPGES-1 may retain their antiinflammatory efficacy by depressing PGE(2), while avoiding the adverse cardiovascular consequences associated with PGHS-2-mediated PGI(2) suppression.
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Affiliation(s)
- Yan Cheng
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Departments of Physiology and Biochemistry, Queen’s University, Kingston, Ontario, Canada
| | - Miao Wang
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Departments of Physiology and Biochemistry, Queen’s University, Kingston, Ontario, Canada
| | - Ying Yu
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Departments of Physiology and Biochemistry, Queen’s University, Kingston, Ontario, Canada
| | - John Lawson
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Departments of Physiology and Biochemistry, Queen’s University, Kingston, Ontario, Canada
| | - Colin D. Funk
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Departments of Physiology and Biochemistry, Queen’s University, Kingston, Ontario, Canada
| | - Garret A. FitzGerald
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Departments of Physiology and Biochemistry, Queen’s University, Kingston, Ontario, Canada
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Cha YI, Kim SH, Sepich D, Buchanan FG, Solnica-Krezel L, DuBois RN. Cyclooxygenase-1-derived PGE2 promotes cell motility via the G-protein-coupled EP4 receptor during vertebrate gastrulation. Genes Dev 2006; 20:77-86. [PMID: 16391234 PMCID: PMC1356102 DOI: 10.1101/gad.1374506] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Gastrulation is a fundamental process during embryogenesis that shapes proper body architecture and establishes three germ layers through coordinated cellular actions of proliferation, fate specification, and movement. Although many molecular pathways involved in the specification of cell fate and polarity during vertebrate gastrulation have been identified, little is known of the signaling that imparts cell motility. Here we show that prostaglandin E(2) (PGE(2)) production by microsomal PGE(2) synthase (Ptges) is essential for gastrulation movements in zebrafish. Furthermore, PGE(2) signaling regulates morphogenetic movements of convergence and extension as well as epiboly through the G-protein-coupled PGE(2) receptor (EP4) via phosphatidylinositol 3-kinase (PI3K)/Akt. EP4 signaling is not required for proper cell shape or persistence of migration, but rather it promotes optimal cell migration speed during gastrulation. This work demonstrates a critical requirement of PGE(2) signaling in promoting cell motility through the COX-1-Ptges-EP4 pathway, a previously unrecognized role for this biologically active lipid in early animal development.
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Affiliation(s)
- Yong I Cha
- Department of Medicine and Cancer Biology, Cell and Developmental Biology, Vanderbilt University Medical Center and Vanderbilt-Ingram Cancer Center, Nashville, Tennessee 37232-2279, USA
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Cha YI, Solnica-Krezel L, DuBois RN. Fishing for prostanoids: deciphering the developmental functions of cyclooxygenase-derived prostaglandins. Dev Biol 2005; 289:263-72. [PMID: 16310177 DOI: 10.1016/j.ydbio.2005.10.013] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Revised: 09/22/2005] [Accepted: 10/07/2005] [Indexed: 12/31/2022]
Abstract
Prostaglandin G/H synthases (PGHS), commonly referred to as cyclooxygenases (COX-1 and COX-2), catalyze a key step in the synthesis of biologically active prostaglandins (PGs), the conversion of arachidonic acid (AA) into prostaglandin H(2) (PGH(2)). PGs have important functions in a variety of physiologic and pathologic settings, including inflammation, cardiovascular homeostasis, reproduction, and carcinogenesis. However, an evaluation of prostaglandin function in early development has been difficult due to the maternal contribution of prostaglandins from the uterus. The emergence of zebrafish as a model system has begun to provide some insights into the roles of this signaling cascade during vertebrate development. In zebrafish, COX-1 derived prostaglandins are required for two distinct stages of development, namely during gastrulation and segmentation. During gastrulation, PGE(2) signaling promotes cell motility, without altering the cell shape or directional migration of gastrulating cells. During segmentation, COX-1 signaling is also required for posterior mesoderm development, including the formation of vascular tube structures, angiogenesis of intersomitic vessels, and pronephros morphogenesis. We propose that deciphering the role for prostaglandin signaling in zebrafish development could yield insight and ultimately address the mechanistic details underlying various disease processes that result from perturbation of this pathway.
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Affiliation(s)
- Yong I Cha
- Department of Medicine and Cancer Biology, Cell and Developmental Biology, Vanderbilt University Medical Center and Vanderbilt Ingram-Cancer Center, Nashville, TN 37232-2279, USA
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Lin DX, Lei ZM, Rao CV. Dependence of Uterine Cyclooxygenase2 Expression on Luteinizing Hormone Signaling. Biol Reprod 2005; 73:256-60. [PMID: 15814897 DOI: 10.1095/biolreprod.105.040667] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Several previous studies have demonstrated that uterine Cox2 (also known as Ptgs2) is required for implantation. Luteinizing hormone (LH) released from anterior pituitary gland and human chorionic gonadotropin released from placenta (hCG) can upregulate the uterine Cox2 gene expression. The Lhcgr knockout (herein designated LHRKO) animals have implantation failure even after estradiol and progesterone therapy. These findings led us to investigate the dependence of uterine Cox2 gene expression on LH signaling in LHRKO animals. The results revealed that, while Cox1 (also known as Ptgs1) mRNA levels were similar, Cox2 mRNA levels were lower in uterus of null animals than in wild-type siblings. Treatment with hCG did not increase Cox2 mRNA levels in null endometrial stromal or myometrial smooth-muscle cells unless gene therapy was performed to introduce native LHCGR. The Cox1 mRNA levels, on the other hand, did not change regardless of the introduction of native or activated Lhcgr or hCG treatment. The Cox2 mRNA increase paralleled the cAMP raise, suggesting that LH uses the cAMP second messenger system. Treating the wild-type uterine cells with hCG resulted in a Cox2 but not Cox1 mRNA increase. This increase became exaggerated when additional native LHCGR were introduced by gene therapy. In conclusion, deletion and reinsertion of Lhcgr further support that uterine Cox2 gene expression is dependent on LH signaling.
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Affiliation(s)
- D X Lin
- Division of Research, Department of Obstetrics, Gynecology and Women's Health, University of Louisville Health Sciences Center, Louisville, Kentucky 40292, USA
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Daikoku T, Wang D, Tranguch S, Morrow JD, Orsulic S, DuBois RN, Dey SK. Cyclooxygenase-1 is a potential target for prevention and treatment of ovarian epithelial cancer. Cancer Res 2005; 65:3735-44. [PMID: 15867369 PMCID: PMC2584020 DOI: 10.1158/0008-5472.can-04-3814] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The precise genetic and molecular defects underlying epithelial ovarian cancer (EOC) remain largely unknown, and treatment options for patients with advanced disease are limited. Cyclooxygenases (COX-1 and COX-2) catalyze the conversion of arachidonic acid to prostaglandins. Whereas overwhelming evidence suggests a role for COX-2 in a variety of cancers, the contribution of COX-1 remains much less explored. The expression status of COX isoforms in ovarian cancers also remains confusing. We have previously shown that human epithelial ovarian tumors have increased levels of COX-1 but not COX-2. To more carefully examine the role of COXs in ovarian cancer, we used a mouse model of EOC in which genetic and oncogenic modifications were experimentally engineered into ovarian surface epithelial cells (OSE) thought to be the cells of origin for human EOC. These OSE cells produce tumors when allografted into host mice. Using multiple approaches, we observed that OSE cells and the tumors comprised of these cells express high levels of COX-1 but not COX-2. Prostacyclin (PGI(2)) is the major prostaglandin generated downstream of COX-1 in these cells, and SC-560, a COX-1-selective inhibitor, dramatically inhibits PGI(2) production. More importantly, SC-560 reduced the growth of tumors when OSE cells were allografted in nude female mice. In contrast, the COX-2-selective inhibitor celecoxib had little effect on tumor growth. The growth inhibitory effects of SC-560 result from reduced cell proliferation and/or accelerated apoptosis. Our results imply COX-1 as a target for the prevention and/or treatment of EOC.
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Affiliation(s)
- Takiko Daikoku
- Department of Pediatrics, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Dingzhi Wang
- Department of Medicine, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Susanne Tranguch
- Department of Cell and Developmental Biology, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jason D. Morrow
- Department of Pharmacology, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sandra Orsulic
- Massachusetts General Hospital Center for Cancer Research, Harvard Medical School, Charlestown, Massachusetts
| | - Raymond N. DuBois
- Department of Medicine, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sudhansu K. Dey
- Department of Pediatrics, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Pharmacology, Division of Reproductive and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
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Sayasith K, Lussier JG, Sirois J. Role of upstream stimulatory factor phosphorylation in the regulation of the prostaglandin G/H synthase-2 promoter in granulosa cells. J Biol Chem 2005; 280:28885-93. [PMID: 15927963 DOI: 10.1074/jbc.m413434200] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
To investigate the role of USF phosphorylation in the regulation of the PGHS-2 promoter in granulosa cells, promoter activity assays were performed in primary cultures of bovine granulosa cells transfected with the chimeric PGHS-2 promoter/luciferase (LUC) construct -149/-2PGHS-2.LUC. Transfections were done in the absence or presence of forskolin; the protein kinase A (PKA) inhibitor H-89; or an expression vector encoding USF1, USF2, the catalytic subunit of PKA (cPKA), or a PKA inhibitor protein (PKI). Electrophoretic mobility shift assays were performed to study USF/DNA interactions using granulosa cell nuclear extracts and a 32P-labeled proximal PGHS-2 promoter fragment containing the E-box element. The results show that forskolin stimulation and cPKA overexpression caused a marked and significant increase in USF-dependent DNA binding and PGHS-2 promoter activities (p < 0.05). In contrast, both activities were decreased by H-89 treatment or PKI overexpression. Reverse transcription-PCR analyses revealed that these treatments had similar effects on endogenous PGHS-2 mRNA levels in granulosa cells. Cotransfection studies with a USF2 mutant lacking N-terminal activation domains (U2Delta1-220) repressed forskolin-, cPKA-, and USF-dependent PGHS-2 promoter activities. Electrophoretic mobility shift assays showed that U2Delta1-220 was able to compete with full-length USF proteins and to saturate the E-box element. Immunoprecipitation/Western blot analyses revealed an increase in the levels of phosphorylated USF1 and USF2 after forskolin treatment, whereas chromatin immunoprecipitation assays showed that binding of USF proteins to the endogenous PGHS-2 promoter was stimulated by forskolin. Site-directed mutagenesis of a consensus PKA phosphorylation site within USF proteins abolished their transactivating capacity. Collectively, these results characterize the role of USF phosphorylation in PGHS-2 expression and identify the phosphorylation-dependent increase in USF binding to the E-box as a putative molecular basis for the increase in PGHS-2 promoter transactivation in granulosa cells.
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Affiliation(s)
- Khampoune Sayasith
- Centre de Recherche en Reproduction Animale and the Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada
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Chen HW, Chen JJW, Yu SL, Li HN, Yang PC, Su CM, Au HK, Chang CW, Chien LW, Chen CS, Tzeng CR. Transcriptome analysis in blastocyst hatching by cDNA microarray*. Hum Reprod 2005; 20:2492-501. [PMID: 15919778 DOI: 10.1093/humrep/dei084] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Hatching is an important process for early embryo development, differentiation and implantation. However, little is known about its regulatory mechanisms. By integrating the technologies of RNA amplification and cDNA microarrays, it has become possible to study the gene expression profile at this critical stage. METHODS Pre-hatched and hatched ICR mouse embryos (25 blastocysts in each group were used in the triplicate experiments) were collected for RNA extraction, amplification, and microarray analysis (the mouse cDNA microarray, 6144 genes, including expressed sequence tags). RESULTS According to cDNA microarray data, we have identified 85 genes that were expressed at a higher level in hatched blastocyst than in pre-hatched blastocysts. In this study, 47 hatching-related candidate genes were verified via re-sequencing. Some of these genes have been selected and confirmed by real-time quantitative RT-PCR. These hatching-specific genes were also expressed at a lower level in the delayed growth embryos (morula or blastocyst without hatching at day 6 post hCG). These genes included: cell adhesion and migration molecules [E-cadherin, neuronal cell adhesion molecule (NCAM), lectin, galactose binding, soluble 7 (Lgals7), vanin 3 and biglycan], epigenetic regulators (Dnmt1, and SIN3 yeast homolog A), stress response regulators (heme oxygenase 1) and immunoresponse regulators [interleukin (IL)-2-inducible T-cell kinase, IL-4R, interferon-gamma receptor 2, and neurotrophin]. The immunostaining of E-cadherin and NCAM showed strong and specific localization in hatched blastocyst. CONCLUSIONS This work provides important information for studying the mechanisms of blastocyst hatching and implantation. These hatching-specific genes may have potential as new drug targets for controlling fertility.
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Affiliation(s)
- Huei-Wen Chen
- Institute and Department of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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Yu Y, Cheng Y, Fan J, Chen XS, Klein-Szanto A, Fitzgerald GA, Funk CD. Differential impact of prostaglandin H synthase 1 knockdown on platelets and parturition. J Clin Invest 2005; 115:986-95. [PMID: 15776109 PMCID: PMC1064983 DOI: 10.1172/jci23683] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2004] [Accepted: 02/01/2005] [Indexed: 12/21/2022] Open
Abstract
Platelet activation is a hallmark of severe preeclampsia, and platelet PGH synthase 1-derived (PGHS1-derived) thromboxane A(2) (TxA(2)) has been implicated in its pathogenesis. However, genetic disruption of PGHS1 delays parturition. We created hypomorphic PGHS1 (PGHS1(Neo/Neo)) mice, in which the substantial but tissue-dependent variability in the inhibition of PGHS1-derived eicosanoids achieved by low-dose aspirin treatment is mimicked, to assess the relative impact of this strategy on hemostatic and reproductive function. Depression of platelet TxA(2) by 98% in PGHS1(Neo/Neo) mice decreased platelet aggregation and prevented thrombosis. Similarly, depression of macrophage PGE(2) by 75% was associated with selectively impaired inflammatory responses. PGF(2alpha) at 8% WT levels was sufficient to induce coordinated temporal oxytocin receptor (OTR) expression in uterus and normal ovarian luteolysis in PGHS1(Neo/Neo) mice at late gestation, while absence of PGHS1 expression in null mice delayed OTR induction and the programmed decrease of serum progesterone during parturition. Thus, extensive but tissue-dependent variability in PG suppression, as occurs with low-dose aspirin treatment, prevents thrombosis and impairs the inflammatory response but sustains parturition. PGHS1(Neo/Neo) mice provide a model of low-dose aspirin therapy that elucidates how prevention or delay of preeclampsia might be achieved without compromising reproductive function.
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Affiliation(s)
- Ying Yu
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Abstract
NSAIDs or cyclooxygenase inhibitors (COX inhibitors), including aspirin, are widely used to treat pain, fever and the articular symptoms of chronic rheumatic diseases. Manifestations of connective tissue or autoimmune diseases are commonly treated with glucocorticosteroids. The effect and side effects of NSAIDs depend on the isoforms of cyclooxygenases that they preferentially or selectively inhibit. The use of COX inhibitors has recently been associated with infertility and miscarriage. The classical nonselective COX inhibitors, including aspirin, do not increase the risk of congenital malformations in humans but administered in the latter part of gestation, they can affect pregnancy and the fetus. The ability of nonselective and selective COX inhibitors to prolong gestation has been used by obstetricians to inhibit premature delivery. The vascular effects of prostaglandin inhibitors can cause constriction of the fetal ductus arteriosus and reduce renal blood flow. These complications have been described for most nonselective COX inhibitors but are increasingly reported also for the selective COX-2 inhibitors. Aspirin, which causes irreversible inhibition of cyclooxygenases, differs from other NSAIDs with regard to indication, effects and side effects. Prematurity, which is increased in pregnancies of women with connective tissue diseases, is an additional risk factor for adverse effects of antenatal exposure to NSAIDs. Therefore, treatment with COX inhibitors should be discontinued at week 32 of gestation. The ability of NSAIDs to compromise reproductive function by inhibition of ovulation and as causative agents for miscarriage is still under debate. Glucocorticosteroids given in early pregnancy are a risk factor for the development of oral clefts. Therefore, the daily dose should be kept to <or= 15 mg during the first trimester. High doses of glucocorticosteroids in the second and third trimester are reserved for flares of autoimmune diseases. Intrauterine fetal growth restriction and premature delivery are possible side effects of high doses.
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Affiliation(s)
- Monika E Østensen
- Department of Rheumatology, University Hospital of Berne, Berne, Switzerland.
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Alam I, Warden SJ, Robling AG, Turner CH. Mechanotransduction in bone does not require a functional cyclooxygenase-2 (COX-2) gene. J Bone Miner Res 2005; 20:438-46. [PMID: 15746988 DOI: 10.1359/jbmr.041124] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2004] [Revised: 07/27/2004] [Accepted: 09/14/2004] [Indexed: 12/21/2022]
Abstract
UNLABELLED COX-2 is a key enzyme involved in the response of bone to loading. However, using mice with a null mutation of the COX-2 gene, we found that a functional COX-2 gene is not required for mechanotransduction. This paradoxical finding may have resulted, in part, from mechanically induced COX-1 activity. INTRODUCTION Cyclooxygenase-2 (COX-2) is an important mediator in the response of bone to mechanical loading, with pharmacological inhibition of COX-2 effectively eliminating or reducing mechanically induced bone formation. In this study, we further investigated the role of COX-2 in skeletal mechanotransduction using a genetic approach. The aim was to compare the skeletal responsiveness of COX-2 homozygous mutant (COX-2(-/-)) and wildtype control (COX-2(+/+)) mice to investigate whether a functional COX-2 gene is necessary for mechanotransduction. MATERIALS AND METHODS Adult female COX-2(+/+) and COX-2(-/-) mice on a C57BL/6x129/ola background were studied using the ulna axial loading model. The response to 2 days of loading for 120 cycles/day at 2 Hz was measured histomorphometrically. Phenotypic characterization of the femurs in these mice was also performed. In a separate group of animals, the expression of the remaining COX isozyme, COX-1, was assessed using real-time RT-PCR 4 h after one bout of 120 loading cycles. RESULTS Null mutation of the COX-2 gene resulted in a consistent femoral phenotype of reduced bone mass, altered architecture, and inferior mechanical properties. Many of these differences were nullified after adjustment for body weight. Nevertheless, body weight-corrected values showed a consistent trend of reduced mechanical properties in COX-2(-/-) mice. Genotype did not influence the response to mechanical loading, with no histomorphometric differences being found between COX-2(+/+) and COX-2(-/-) mice. Real-time RT-PCR showed COX-2(-/-) mice to express significantly greater COX-1 expression in loaded ulnas than in loaded ulnas in COX-2(+/+) mice. There were no differences in COX-1 expression in nonloaded ulnas. CONCLUSIONS A functional COX-2 gene was not found to be required for skeletal mechanotransduction. This is in contrast to previous pharmacological studies showing that COX-2 is critical to the response of bone to loading. Investigating a potential reason for the absence of a genotype difference in this study, we found that mice with a null mutation in the COX-2 gene possess inductive skeletal COX-1 expression.
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Affiliation(s)
- Imranul Alam
- Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA
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Sirois J, Sayasith K, Brown KA, Stock AE, Bouchard N, Doré M. Cyclooxygenase-2 and its role in ovulation: a 2004 account. Hum Reprod Update 2004; 10:373-85. [PMID: 15205395 DOI: 10.1093/humupd/dmh032] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The pre-ovulatory surge of gonadotrophins triggers a marked and obligatory increase in follicular prostaglandin synthesis prior to ovulation, and the cyclooxygenase (COX) enzyme is a key rate-limiting step in the biosynthesis of prostaglandins. In the early 1990s, the pre-ovulatory rise in follicular prostaglandin synthesis was shown to result from the selective induction of a novel COX isoform, now referred to as COX-2. Differences in the time-course of COX-2 induction in species with a short versus a long ovulatory process suggest that the enzyme could be a molecular determinant that sets the alarm of the mammalian ovulatory clock. Some of the fine molecular mechanisms involved in the transcriptional activation of the COX-2 gene in granulosa cells have also been elucidated. The binding of trans-activating upstream stimulatory factors (USF) to a consensus E-box cis-element in the proximal region of the promoter was shown to play a predominant role in COX-2 transcription. Studies showed that COX-2 expression could also serve as a valuable marker for follicular commitment to ovulation during hyperstimulatory cycles. This paper presents a comprehensive review of the events that led to the characterization of COX-2 in pre-ovulatory follicles, updates current concepts on the control of COX-2 expression in pre-ovulatory follicles, and addresses the consequences of COX-2 inhibition to women fertility and potential implications of COX-2 expression in ovarian cancer.
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Affiliation(s)
- Jean Sirois
- Centre de recherche en reproduction animale and Département de biomédecine vétérinaire, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada.
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Gaytan M, Bellido C, Morales C, Gonzalez-Padilla M, Sanchez-Criado JE, Gaytan F. Immature rats show ovulatory defects similar to those in adult rats lacking prostaglandin and progesterone actions. Reprod Biol Endocrinol 2004; 2:63. [PMID: 15345060 PMCID: PMC516790 DOI: 10.1186/1477-7827-2-63] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2004] [Accepted: 09/03/2004] [Indexed: 12/01/2022] Open
Abstract
Gonadotropin-primed immature rats (GPIR) constitute a widely used model for the study of ovulation. Although the equivalence between the ovulatory process in immature and adult rats is generally assumed, the morphological and functional characteristics of ovulation in immature rats have been scarcely considered. We describe herein the morphological aspects of the ovulatory process in GPIR and their response to classical ovulation inhibitors, such as the inhibitor of prostaglandin (PG) synthesis indomethacin (INDO) and a progesterone (P) receptor (PR) antagonist (RU486). Immature Wistar rats were primed with equine chorionic gonadotropin (eCG) at 21, 23 or 25 days of age, injected with human chorionic gonadotropin (hCG) 48 h later, and sacrificed 16 h after hCG treatment, to assess follicle rupture and ovulation. Surprisingly, GPIR showed age-related ovulatory defects close similar to those in adult rats lacking P and PG actions. Rats primed with eCG at 21 or 23 days of age showed abnormally ruptured corpora lutea in which the cumulus-oocyte complex (COC) was trapped or had been released to the ovarian interstitum, invading the ovarian stroma and blood and lymphatic vessels. Supplementation of immature rats with exogenous P and/or PG of the E series did not significantly inhibit abnormal follicle rupture. Otherwise, ovulatory defects were practically absent in rats primed with eCG at 25 days of age. GPIR treated with INDO showed the same ovulatory alterations than vehicle-treated ones, although affecting to a higher proportion of follicles. Blocking P actions with RU486 increased the number of COC trapped inside corpora lutea and decreased ovulation. The presence of ovulatory defects in GPIR, suggests that the capacity of the immature ovary to undergo the coordinate changes leading to effective ovulation is not fully established in Wistar rats primed with eCG before 25 days of age.
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Affiliation(s)
- María Gaytan
- Department of Cell Biology, Physiology and Immunology, School of Medicine, University of Cordoba, Spain
| | - Carmen Bellido
- Department of Cell Biology, Physiology and Immunology, School of Medicine, University of Cordoba, Spain
| | - Concepcion Morales
- Department of Pathology, School of Medicine, University of Cordoba, Spain
| | | | - Jose E Sanchez-Criado
- Department of Cell Biology, Physiology and Immunology, School of Medicine, University of Cordoba, Spain
| | - Francisco Gaytan
- Department of Cell Biology, Physiology and Immunology, School of Medicine, University of Cordoba, Spain
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