1
|
Han JS, Kim SJ, Nam Y, Lee HY, Kim GM, Kim DM, Sohn UD. The Inhibitory Mechanism on Acetylcholine-Induced Contraction of Bladder Smooth Muscle in the Streptozotocin-Induced Diabetic Rat. Biomol Ther (Seoul) 2019; 27:101-106. [PMID: 30419634 PMCID: PMC6319557 DOI: 10.4062/biomolther.2018.136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/10/2018] [Accepted: 09/20/2018] [Indexed: 12/19/2022] Open
Abstract
Most diabetic patients experience diabetic mellitus (DM) urinary bladder dysfunction. A number of studies evaluate bladder smooth muscle contraction in DM. In this study, we evaluated the change of bladder smooth muscle contraction between normal rats and DM rats. Furthermore, we used pharmacological inhibitors to determine the differences in the signaling pathways between normal and DM rats. Rats in the DM group received an intraperitoneal injection of 65 mg/kg streptozotocin and measured blood glucose level after 14 days to confirm DM. Bladder smooth muscle contraction was induced using acetylcholine (ACh, 10⁻⁴ M). The materials such as, atropine (a muscarinic receptor antagonist), U73122 (a phospholipase C inhibitor), DPCPX (an adenosine A₁ receptor antagonist), udenafil (a PDE5 inhibitor), prazosin (an α₁-receptor antagonist), papaverine (a smooth muscle relaxant), verapamil (a calcium channel blocker), and chelerythrine (a protein kinase C inhibitor) were pre-treated in bladder smooth muscle. We found that the DM rats had lower bladder smooth muscle contractility than normal rats. When prazosin, udenafil, verapamil, and U73122 were pre-treated, there were significant differences between normal and DM rats. Taken together, it was concluded that the change of intracellular Ca²⁺ release mediated by PLC/IP3 and PDE5 activity were responsible for decreased bladder smooth muscle contractility in DM rats.
Collapse
Affiliation(s)
- Jong Soo Han
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Su Jin Kim
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yoonjin Nam
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hak Yeong Lee
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Geon Min Kim
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Dong Min Kim
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Uy Dong Sohn
- Signaling and Pharmacological Activity Research Lab, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| |
Collapse
|
2
|
Han JS, Min YS, Kim GH, Chae SH, Nam Y, Lee J, Lee SY, Sohn UD. The change of signaling pathway on the electrical stimulated contraction in streptozotocin-induced bladder dysfunction of rats. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 22:577-584. [PMID: 30181704 PMCID: PMC6115354 DOI: 10.4196/kjpp.2018.22.5.577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 05/28/2018] [Indexed: 01/11/2023]
Abstract
Bladder dysfunction is a common complication of diabetes mellitus (DM). However, there have been a few studies evaluating bladder smooth muscle contraction in DM in the presence of pharmacological inhibitors. In the present study, we compared the contractility of bladder smooth muscle from normal rats and DM rats. Furthermore, we utilized pharmacological inhibitors to delineate the mechanisms underlying bladder muscle differences between normal and DM rats. DM was established in 14 days after using a single injection of streptozotocin (65 mg/kg, intraperitoneal) in Sprague-Dawley rats. Bladder smooth muscle contraction was induced electrically using electrical field stimulation consisting of pulse trains at an amplitude of 40 V and pulse duration of 1 ms at frequencies of 2–10 Hz. In this study, the pharmacological inhibitors atropine (muscarinic receptor antagonist), U73122 (phospholipase C inhibitor), DPCPX (adenosine A1 receptor antagonist), udenafil (PDE5 inhibitor), prazosin (α1-receptor antagonist), verapamil (calcium channel blocker), and chelerythrine (protein kinase C inhibitor) were used to pretreat bladder smooth muscles. It was found that the contractility of bladder smooth muscles from DM rats was lower than that of normal rats. In addition, there were significant differences in percent change of contractility between normal and DM rats following pretreatment with prazosin, udenafil, verapamil, and U73122. In conclusion, we suggest that the decreased bladder muscle contractility in DM rats was a result of perturbations in PLC/IP3-mediated intracellular Ca2+ release and PDE5 activity.
Collapse
Affiliation(s)
- Jong Soo Han
- Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Young Sil Min
- Department of Pharmaceutical Engineering, College of Convergence Science and Technology, Jung Won University, Goesan 28054, Korea
| | - Gil Hyung Kim
- Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Sang-Hyun Chae
- Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Yoonjin Nam
- Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Jaehwi Lee
- Pharmaceutical Formulation Design Laboratory, College of Pharmacy, Chung-Ang University , Seoul 06974, Korea
| | - Seok-Yong Lee
- Department of Pharmacology, School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Uy Dong Sohn
- Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| |
Collapse
|
3
|
Pereira ML, D'ancona CAL, Rojas-Moscoso JA, Ramos ACS, Monica FZ, Antunes E. Effects of nitric oxide inhibitors in mice with bladder outlet obstruction. Int Braz J Urol 2017; 43:356-366. [PMID: 28328190 PMCID: PMC5433376 DOI: 10.1590/s1677-5538.ibju.2015.0441] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 08/15/2016] [Indexed: 11/21/2022] Open
Abstract
PURPOSE To investigate the lower urinary tract changes in mice treated with L-NAME, a non-selective competitive inhibitor of nitric oxide synthase (NOS), or aminoguanidine, a competitive inhibitor of inducible nitric oxide synthase (iNOS), after 5 weeks of partial bladder outlet obstruction (BOO), in order to evaluate the role of constitutive and non-constitutive NOS in the pathogenesis of this experimental condition. MATERIALS AND METHODS C57BL6 male mice were partially obstructed and randomly allocated into 6 groups: Sham, Sham + L-NAME, Sham + aminoguanidine, BOO, BOO + L-NAME and BOO + aminoguanidine. After 5 weeks, bladder weight was obtained and cystometry and tissue bath contractile studies were performed. RESULTS BOO animals showed increase of non-voiding contractions (NVC) and bladder capacity, and also less contractile response to Carbachol and Electric Field Stimulation. Inhibition of NOS isoforms improved bladder capacity and compliance in BOO animals. L-NAME caused more NVC, prevented bladder weight gain and leaded to augmented contractile responses at muscarinic and electric stimulation. Aminoguanidine diminished NVC, but did not avoid bladder weight gain in BOO animals and did not improve contractile responses. CONCLUSION It can be hypothesized that chronic inhibition of three NOS isoforms in BOO animals leaded to worsening of bladder function, while selective inhibition of iNOS did not improve responses, what suggests that, in BOO animals, alterations are related to constitutive NOS.
Collapse
Affiliation(s)
- Marcy Lancia Pereira
- Departamento de Cirurgia, Faculdade de Ciências Médicas - UNICAMP, Campinas, SP, Brasil
| | | | | | | | - Fabiola Zakia Monica
- Departamento de Farmacologia, Faculdade de Ciências Médicas - UNICAMP, Campinas, SP, Brasil
| | - Edson Antunes
- Departamento de Farmacologia, Faculdade de Ciências Médicas - UNICAMP, Campinas, SP, Brasil
| |
Collapse
|
4
|
Zhang X, Alwaal A, Lin G, Li H, Zaid UB, Wang G, Wang L, Banie L, Ning H, Lin CS, Guo Y, Zhou L, Lue TF. Urethral musculature and innervation in the female rat. Neurourol Urodyn 2015; 35:382-9. [PMID: 25597596 DOI: 10.1002/nau.22722] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 11/19/2014] [Indexed: 11/10/2022]
Abstract
AIMS The urethral sphincter and urethral muscle innervation are critically involved in maintaining continence, especially in the female. However, the urethral muscle type and distribution, as well as the urethral nerves are far from being well documented. Our aim was to clearly identify the distribution of urethral striated muscle, smooth muscle, and urethral nerves. METHODS In a cohort analysis of 3-month-old female Sprague-Dawley rats, cross and longitudinal sections of female rat urethra were extensively investigated using morphological techniques. Urethras were harvested to the sections, in order to provide both global and detailed visions of the urethra. H&E, Masson's Trichrome, phalloidin and immunoflourence stains were used. The cytoarchitecture, nitrergic, and cholinergic innervations were mainly investigated. Different layers of the segments of urethra were traced to draw curve graphs that represent the thickness of each muscle layer of urethral wall. RESULTS The results showed that the primary peak of striated muscle is in the middle urethra. The inner layer close to mucosa was found to contain longitudinal smooth muscle. Near the bladder orifice, the circular smooth muscle dominates, which becomes thinner distally throughout the rest of urethra. In the middle urethra the vast majority of the urethral muscle are circularly oriented striated muscle cells. Typical nerve endings were present in high power images to show the different characteristic features of nerve innervation. CONCLUSIONS This study has illustrated the detailed morphological structure and innervations of the normal female rat urethra and can serve as a basis for further study of stress urinary incontinence (SUI).
Collapse
Affiliation(s)
- Xiaoyu Zhang
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California.,Department of Urology, Peking University First Hospital and the Institute of Urology, Peking University, Beijing, P.R. China
| | - Amjad Alwaal
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Guiting Lin
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Huixi Li
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Uwais B Zaid
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Guifang Wang
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Lin Wang
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California.,Department of Urology, Peking University First Hospital and the Institute of Urology, Peking University, Beijing, P.R. China
| | - Lia Banie
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Hongxiu Ning
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Ching-Shwun Lin
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| | - Yinglu Guo
- Department of Urology, Peking University First Hospital and the Institute of Urology, Peking University, Beijing, P.R. China
| | - Liqun Zhou
- Department of Urology, Peking University First Hospital and the Institute of Urology, Peking University, Beijing, P.R. China
| | - Tom F Lue
- Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California
| |
Collapse
|
5
|
Mónica FZT, Bricola AAO, Báu FR, Freitas LLL, Teixeira SA, Muscará MN, Abdalla FMF, Porto CS, De Nucci G, Zanesco A, Antunes E. Long-term nitric oxide deficiency causes muscarinic supersensitivity and reduces beta(3)-adrenoceptor-mediated relaxation, causing rat detrusor overactivity. Br J Pharmacol 2008; 153:1659-68. [PMID: 18297104 DOI: 10.1038/bjp.2008.39] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE Overactive bladder is a complex and widely prevalent condition, but little is known about its physiopathology. We have carried out morphological, biochemical and functional assays to investigate the effects of long-term nitric oxide (NO) deficiency on muscarinic receptor and beta-adrenoceptor modulation leading to overactivity of rat detrusor muscle. EXPERIMENTAL APPROACH Male Wistar rats received N(omega)-nitro-L-arginine methyl ester (L-NAME) in drinking water for 7-30 days. Functional responses to muscarinic and beta-adrenoceptor agonists were measured in detrusor smooth muscle (DSM) strips in Krebs-Henseleit solution. Measurements of [(3)H]inositol phosphate, NO synthase (NOS) activity, [(3)H]quinuclidinyl benzilate ([(3)H]QNB) binding and bladder morphology were also performed. KEY RESULTS Long-term L-NAME treatment significantly increased carbachol-induced DSM contractile responses after 15 and 30 days; relaxing responses to the beta(3)-adrenoceptor agonist BRL 37-344 were significantly reduced at 30 days. Constitutive NOS activity in bladder was reduced by 86% after 7 days and maintained up to 30 days of L-NAME treatment. Carbachol increased sixfold the [(3)H]inositol phosphate in bladder tissue from rats treated with L-NAME. [(3)H]QNB was bound with an apparent K(D) twofold higher in bladder membranes after L-NAME treatment compared with that in control. No morphological alterations in DSM were found. CONCLUSIONS AND IMPLICATIONS Long-term NO deficiency increased rat DSM contractile responses to a muscarinic agonist, accompanied by significantly enhanced K(D) values for muscarinic receptors and [(3)H]inositol phosphate accumulation in bladder. This supersensitivity for muscarinic agonists along with reductions of beta(3)-adrenoceptor-mediated relaxations indicated that overactive DSM resulted from chronic NO deficiency.
Collapse
Affiliation(s)
- F Z T Mónica
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|