Journals / Ankara Üniversitesi Veteriner Fakültesi Dergisi / 2012 / Cilt: 59 - Sayı: 4

Gebe ratların rahim içi dokularında uyarılabilir nitrik oksit sentaz, endotelyal nitrik oksit sentaz ve siklooksijenaz-2 mRNA ekspresyon değişiklikleri

The changes of ınducible nitric oxide synthase, endothelial nitric oxide synthase and cyclooxygenase-2 mRNA expressions in intrauterine tissues of pregnant rats

Pages
295–301
Publication Date
2022-10-12
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, there may be an interaction between the NO and PG pathways in cervical ripening and parturition.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Prostaglandins (PGs) are produced by the intrauterine tissues of pregnancy and play important role in all of the physiological processes of parturition.
📊
Key Findings & Data:The purpose of this study is to examine the expression of cyclooxygenase-2 (COX-2), inducible NOS (iNOS) and endothelial NOS (eNOS) mRNA levels during gestation, parturition, and postpartum in pregnant rat uterus.
💡
Conclusion & Impact:In conclusion, there may be an interaction between the NO and PG pathways in cervical ripening and parturition.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Prostaglandins (PGs) are produced by the intrauterine tissues of pregnancy and play important role in all of the physiological processes of parturition. PGs are synthesized from arachidonic acid by the action of cyclooxygenase (COX). Nitric oxide (NO) is a potent smooth muscle relaxant and is considered to be an important local mediator that suppresses uterine contractility. There may be an interaction between the NO and PG pathways in regulating the nitric oxide synthase (NOS) and COX expression and this interaction may play a critical role in the control of cervical ripening and parturition. The purpose of this study is to examine the expression of cyclooxygenase-2 (COX-2), inducible NOS (iNOS) and endothelial NOS (eNOS) mRNA levels during gestation, parturition, and postpartum in pregnant rat uterus. Forty-two pregnant Sprague Dawley rats were randomly divided into 7 groups. Both uterine horns were removed and the pups and placentas were discarded. Complementary DNA (cDNA) was synthesized after isolation of total RNA from the tissues. The relative expression of iNOS, eNOS and COX-2 genes were measured by quantitative real-time polymerase chain reaction (QRT-PCR). The mRNA level of iNOS was increased during gestation; highest level in parturition and then it decreased at postpartum. The eNOS mRNA level was generally low during gestation in all groups and was significantly increased at postpartum. The COX-2 mRNA levels decreased as the pregnancy progressed to term with the highest level occurring on day 21 and the lovest levels during the postpartum period. In conclusion, there may be an interaction between the NO and PG pathways in cervical ripening and parturition. These results may show that mRNA levels of eNOS, iNOS and COX-2 genes may be effective cervical ripening during pregnancy and parturition.

Özet

Prostaglandinler (PG) gebelikte rahim içi dokularda üretilirler ve doğum sırasındaki tüm fizyolojik süreçlerde önemli rol oynarlar. PG'ler araşidonik asitten siklooksijenaz (COX) enziminin aktivitesi ile sentezlenirler. Nitrik oksit (NO) güçlü bir düz kas gevşetici ve uterus kasılmasını baskılayan önemli bir bölgesel ara bulucu olarak kabul edilir. Nitrik oksit sentaz (NOS) ve COX ifadelenmesinin düzenlenmesinde NO ve PG yolakları arasında bir etkileşim olabilir ve bu etkileşim servikal olgunlaşma ve doğumun kontrolünde kritik bir rol oynayabilir. Bu çalışmanın amacı, hamile rat uterusunda gebelikte, doğum sırasında ve doğum sonrasında siklooksijenaz-2 (COX-2), uyarılabilir NOS (iNOS) ve endotelyal NOS (eNOS) mRNA düzeylerini incelemektir. Kırk iki hamile Sprague Dawley rat rastgele olarak 7 gruba ayrıldı. Her iki uterin boynuzu ve yavrular ve plasenta çıkarıldı. Tamamlayıcı DNA (cDNA) dokulardan total RNA izole edildikten sonra sentezlendi. iNOS, eNOS ve COX-2 genlerinin göreceli ifadelenmesi kantitatif gerçek zamanlı polimeraz zincir reaksiyonu (QRT-PCR) ile ölçüldü. iNOS mRNA düzeyleri gebelik sırasında arttı, doğum sırasında en yüksek düzeye çıktı ve doğum sonrasında azaldı. eNOS mRNA düzeyleri tüm gruplarda gebelik boyunca genel olarak düşüktü ve doğum sonrasında belirgin bir şekilde yükseldi. COX-2 mRNA düzeyleri gebeliğin sonlarına doğru azaldı, gebeliğin 21. gününde en yüksek seviyeye ulaştı ve doğum sonrası dönemde en düşük düzeylerde kaldı. Sonuç olarak servikal genişleme ve doğum sırasında, NO ve PG yolakları arasında bir etkileşim olabilir. Bu sonuçlar eNOS, iNOS ve COX-2 genlerinin mRNA düzeylerindeki değişikliklerin gebelikte servikal olgunlaşma ve doğum sırasında etkili olabileceğini gösterebilir.

🔖

Cite This Article

YAR, A. S., MENEVŞE, S., ANADOLU, E. (2022). Gebe ratların rahim içi dokularında uyarılabilir nitrik oksit sentaz, endotelyal nitrik oksit sentaz ve siklooksijenaz-2 mRNA ekspresyon değişiklikleri. Ankara Üniversitesi Veteriner Fakültesi Dergisi, Cilt: 59 - Sayı: 4, 295–301. https://ajindex.com/articles/444872

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (15)

  1. Abel MH, Kelly RW (1979): Differential production of prostaglandins within the human uterus. Prostaglandins, 18, 821-828
  2. Ali M, Buhimschi I, Chwalisz K, Garfield RE (1997): Changes in expression of the nitric oxide synthase isoforms in rat uterus and cervix during pregnancy and parturition. Mol Hum Reprod, 3, 995-1003
  3. Arslan A, Zingg HH (1996): Regulation of COX-2 gene expression in rat uterus in vivo and in vitro. Prostaglandins, 52,463-481
  4. Bansal RK, Goldsmith PC, He Y, Zaloudek CJ, Ecker JL, Riemer RK (1997): A decline in myometrial nitric oxide synthase expression is associated with labor and delivery. J Clin Invest, 99, 2502-2508
  5. Buhimschi I, Ali M, Jain V, Chwalisz K, Garfield RE (1996): Differential regulation of nitric oxide in the rat uterus and cervix during pregnancy and labour. Hum Reprod, 11, 1755-1766
  6. Chwalisz K, Garfield JRE (1997): Regulation of the uterus and cervix during pregnancy and labor. Role of progesterone and nitric oxide. Ann N Y Acad Sci, 828, 238-53
  7. Dong YL, Gangula PR, Fang L, Yallampalli C (1996): Differential expression of cyclooxygenase-1 and -2 proteins in rat uterus and cervix during the estrous cycle, pregnancy, labor and in myometrial cells. Prostaglandins, 52, 13-34
  8. Dong YL, Gangula PRR, Yallampalli C (1996): Nitric oxide synthase isoforms in the rat uterus: differential regulation during pregnancy and labor. J Reprod Fertil, 107, 249-254
  9. Fittkow CT, Shi SQ, Bytautiene E, Olson G, Saade GR, Garfield RE (2001): Changes in light-induced fluorescence of cervical collagen in guinea pigs during gestation and after sodium nitroprusside treatment. J Perinat Med, 29, 535-543
  10. Ghabour MS, Eis AL, Brockman DE, Pollock JS, Myatt L (1995): Immunohistochemical characterization of placental nitric oxide synthase expression in preeclampsia. Am J Obstet Gynecol, 173, 687-694
  11. Gibb W (1998): The role of prostaglandins in human parturition. Ann Med, 30, 235-241
  12. Keirse MJ (1993): Prostaglandins in preinduction cervical ripening. Meta-analysis of worldwide clinical experience. J Reprod Med, 38, 89-100
  13. Knowles RG, Moncada S (1994): Nitric oxide synthases in mammals. Biochem J, 298, 249-258
  14. Ledingham MA, Thomson A J, Young A, Macara LM, Greer I A, Norman JE (2000): Changes in the expression of nitric oxide synthase in the human uterine cervix during pregnancy and parturition. Mol Hum Reprod, 6, 1041-1048
  15. Marx SG, Wentz MJ, Mackay LB, Schlembach D, Maul H, Fittkow C, Given R, Ved