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Abolhasanpour N, Hajebrahimi S, Ebrahimi-Kalan A, Mehdipour A, Salehi-Pourmehr H. Urodynamic Parameters in Spinal Cord Injury-Induced Neurogenic Bladder Rats after Stem Cell Transplantation: A Narrative Review. IRANIAN JOURNAL OF MEDICAL SCIENCES 2020; 45:2-15. [PMID: 32038054 PMCID: PMC6983271 DOI: 10.30476/ijms.2019.45318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Neurogenic bladder (NGB) secondary to spinal cord injury (SCI) is accompanied with several complications such as urinary tract deterioration, urinary incontinence, and consequently lower quality of life (QoL),
significant morbidities, and occasionally death. Current therapeutic methods have some side effects and there is no treatment for the upper urinary tract injuries. Stem cell therapy is a promising method for
treating this condition. However, the best timing and the best route of its transplantation have not yet been determined. Animal models of SCI, especially in rats, are the most commonly used method for evaluating
the efficacy of cell therapy in NGB improvement, and the most common assessment method is the urodynamic studies (UDS). However, there are variations in the range of UDS parameters among the published studies.
The current review aimed to discuss the effect of stem cell transplantation on bladder dysfunction recovery based on urodynamic parameters after SCI in rats. For this purpose, the cell source, doses, the route
of administration, and the complete UDS equipment and its parameters were summarized in SCI models in rats. In some urodynamic test results, to some extent, an improvement in the lower urinary system function
was observed in each treatment group. However, this improvement was far from full functional recovery. The average cell dose was about 1 million cells in every injected site. In most studies, the stem cells (SCs)
were transplanted 9 days after the injury using PE-50 and PE-60. Many researchers have recommended further experimental and clinical studies to confirm this treatment modality.
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Affiliation(s)
- Nasrin Abolhasanpour
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Sakineh Hajebrahimi
- Research Center for Evidence Based-Medicine, Iranian EBM Centre: A Joanna Briggs Institute Affiliated Group, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Urology, Imam Reza Teaching Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abbas Ebrahimi-Kalan
- Department of Neurosciences and Cognitive, School of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ahmad Mehdipour
- Department of Tissue Engineering, School of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hanieh Salehi-Pourmehr
- Research Center for Evidence Based-Medicine, Iranian EBM Centre: A Joanna Briggs Institute Affiliated Group, Tabriz University of Medical Sciences, Tabriz, Iran.,Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Ueno M, Minagawa T, Saito T, Imamura T, Nagai T, Ogawa T, Ishizuka O. Therapeutic effects of Choreito, a traditional Japanese (Kampo) medicine, on detrusor overactivity induced by acetic acid in rats. Low Urin Tract Symptoms 2020; 12:198-205. [PMID: 32017455 DOI: 10.1111/luts.12302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/23/2019] [Accepted: 01/08/2020] [Indexed: 01/20/2023]
Abstract
Choreito (CRT), a traditional Japanese (Kampo) medicine, is widely used for the treatment of overactive bladder (OAB) and other lower urinary tract symptoms in Japan. This study aimed to identify the effects and therapeutic mechanism of CRT on the improvement of detrusor overactivity (DO) using an experimental rat model. Forty-five female Sprague-Dawley rats were equally divided into three groups: intravesical saline instillation with normal food (normal group), intravesical acetic acid (AA) instillation with normal food (AA group), and intravesical AA instillation with CRT (AA with CRT group). To induce a decrease in bladder capacity, instillation of 0.2% AA was used based on prior studies. Cystometric investigation was employed to clarify the effects of AA and CRT. Microcirculation was performed using a laser blood flowmeter, and the localization of hypoxia-inducible factor 1α (HIF1α) was assessed by immunohistochemistry. The bladder capacities of the normal, AA, and AA with CRT groups were 1.2 ± 0.3 mL, 0.4 ± 0.1 mL, and 0.8 ± 0.1 mL, respectively. CRT significantly attenuated AA irritation of the urinary bladder and exerted protective effects on basal pressure, micturition pressure, micturition interval, and micturition volume. Furthermore, CRT could prevent the excess blood flow and edematous change under the urothelium induced by intravesical AA instillation. No obvious changes in immunohistochemical HIF1α staining were observed among the groups. CRT attenuated DO induced by intravesical AA instillation in a rat experimental model. CRT might impart therapeutic effects on OAB via the mitigation of urothelial damage and regulation of excess blood flow.
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Affiliation(s)
- Manabu Ueno
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tomonori Minagawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tetsuichi Saito
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tetsuya Imamura
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takashi Nagai
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Teruyuki Ogawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Ishizuka
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
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Sartori AM, Kessler TM, Schwab ME. Methods for Assessing Lower Urinary Tract Function in Animal Models. Eur Urol Focus 2020; 7:186-189. [PMID: 31937460 DOI: 10.1016/j.euf.2019.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/17/2019] [Accepted: 12/10/2019] [Indexed: 12/15/2022]
Abstract
Lower urinary tract dysfunction affects a multitude of patients. Current therapeutic approaches are limited and very little is known about the mechanisms in failure of bladder control. Thus, more basic research is clearly needed to elucidate the underlying pathological mechanisms and to develop novel treatment strategies in urology. Noninvasive tests such as the void-spot assay and the metabolic cage and more invasive urodynamics investigations are currently used to assess lower urinary tract function in animals, in particular rodents. The noninvasive tests give some insights into the functionality of the system, whereas urodynamics testing yields an objective evaluation that allows distinction of different pathologies and investigations of the underlying neuronal malfunctions. PATIENT SUMMARY: We briefly summarize methods currently used to assess impairments of bladder function in animal models. Both noninvasive and invasive methods are available and can be used to understand and improve human health. An accurate and detailed diagnosis is, however, possible only with urodynamics assessments.
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Affiliation(s)
- Andrea M Sartori
- Institute for Regenerative Medicine, University of Zürich, Zürich, Switzerland; Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.
| | - Thomas M Kessler
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Martin E Schwab
- Institute for Regenerative Medicine, University of Zürich, Zürich, Switzerland
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Verstegen AM, Tish MM, Szczepanik LP, Zeidel ML, Geerling JC. Micturition video thermography in awake, behaving mice. J Neurosci Methods 2019; 331:108449. [PMID: 31812917 DOI: 10.1016/j.jneumeth.2019.108449] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 09/11/2019] [Accepted: 09/27/2019] [Indexed: 11/15/2022]
Abstract
BACKGROUND Our understanding of the neural circuits controlling micturition and continence is constrained by a paucity of techniques for measuring voiding in awake, behaving mice. NEW METHOD To facilitate progress in this area, we developed a new, non-invasive assay, micturition video thermography (MVT), using a down-facing thermal camera above mice on a filter paper floor. RESULTS Most C57B6/J mice void infrequently, with a stereotyped behavioral sequence, and usually in a corner. The timing of each void is indicated by the warm thermal contrast of freshly voided urine. Over the following 10-15 min, urine cools to ∼3 °C below the ambient temperature and spreads radially in the filter paper. By measuring the area of cool contrast comprising this "thermal void spot," we can derive the initially voided volume. Thermal videos also reveal mouse behaviors including a home-corner preference apart from void spots, and a stereotyped, seconds-long pause while voiding. COMPARISON WITH EXISTING METHODS AND CONCLUSIONS MVT is a robust, non-invasive method for measuring the timing, volume, and location of voiding. It improves on an existing technique, the void spot assay, by adding timing information, and unlike the cystometrogram preparation, MVT does not require surgical catheterization. Combining MVT with current neuroscience techniques will improve our understanding of the neural circuits that control continence, which is important for addressing the growing number of patients with urinary incontinence as the population ages.
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Affiliation(s)
- Anne M Verstegen
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA
| | - Margaret M Tish
- Department of Neurology, University of Iowa Hospital and Clinics, Iowa City, IA, USA
| | - Luca P Szczepanik
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA
| | - Mark L Zeidel
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA
| | - Joel C Geerling
- Department of Neurology, University of Iowa Hospital and Clinics, Iowa City, IA, USA.
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Sartori AM, Schwab ME, Kessler TM. Ultrasound: A Valuable Translational Tool to Measure Postvoid Residual in Awake Rats? Eur Urol Focus 2019; 6:916-921. [PMID: 31813811 DOI: 10.1016/j.euf.2019.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/17/2019] [Accepted: 11/26/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Ultrasound is generally used to measure postvoid residual (PVR) in daily clinical practice for a basic assessment of voiding dysfunction. In animal research, however, PVR is measured mostly by expelling the urine with gentle squeezing of the bladder. OBJECTIVE To assess the translational value of measuring PVR by ultrasound in awake rats with the aim of obtaining directly comparable data sets in patients and rodent models. DESIGN, SETTING, AND PARTICIPANTS A prospective animal study was conducted in 10 rats with large, incomplete thoracic spinal cord injury resulting in severe bladder impairment. Lower urinary tract function was assessed by urodynamics with implanted bladder catheter and external urethral sphincter electrodes, allowing for repeated measurements over time. Immediately after the last micturition cycle in the urodynamic investigation, PVR was first assessed by ultrasound using a 7.5 MHz linear probe and then by manually expelling the urine via gentle pressure on the abdomen. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS PVR was measured by ultrasound and by manually expelling the urine. Paired t test was used to analyze the difference between the two measurements 1 and 2 wk after spinal cord injury. RESULTS AND LIMITATIONS PVR assessed by ultrasound was equal to and not statistically different from the volumes obtained by manual expulsion in intact rats, both before injury and during the first 2 wk after spinal cord injury (intact: 0.16 ± 0.07 vs 0.14 ± 0.09 ml, p = 0.08; week 1: 1.67 ± 0.53 vs 1.71 ± 0.55 ml, p = 0.67; week 2: 1.16 ± 0.35 vs 0.98 ± 0.43 ml, p = 0.11). The main limitation of ultrasound for measuring PVR is the restricted availability of ultrasound machines in animal research laboratories. CONCLUSIONS Ultrasound is a valuable translational tool to measure PVR in awake rats reflecting the situation in humans. PATIENT SUMMARY We measured postvoid residual by ultrasound in awake rats, analogous to clinical examination in humans. Ultrasonography provided similar values to the generally used manual bladder expulsion.
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Affiliation(s)
- Andrea M Sartori
- Institute for Regenerative Medicine, University of Zürich, Zürich, Switzerland; Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.
| | - Martin E Schwab
- Institute for Regenerative Medicine, University of Zürich, Zürich, Switzerland
| | - Thomas M Kessler
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
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Wireless intravesical device for real-time bladder pressure measurement: Study of consecutive voiding in awake minipigs. PLoS One 2019; 14:e0225821. [PMID: 31790475 PMCID: PMC6886791 DOI: 10.1371/journal.pone.0225821] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 11/13/2019] [Indexed: 12/16/2022] Open
Abstract
Traditional urodynamics have poor correlation with urological symptoms. Ambulatory urodynamics may improve this correlation but the need for a transurethral catheter and the time-consuming nature of this examination limits its use. Therefore, the objective of this study was to develop a wireless real-time bladder pressure measurement device for repeated and prolonged-term measurement of bladder behavior in awake pigs. The Bladder Pill is an intravesical device with a pressure microsensor and a 3-dimensional inductive coupling coil for energy supply. A corresponding external coil provides wireless power transmission and real-time communication of bladder pressure data. To test the correlation between the pressure data measured by the device and by standard methods, we compared static water column pressures with this device and water-filled urodynamic catheter systems. In vivo assessment of awake voiding by the pill was done by introducing the bladder pill into the bladder of Göttingen minipigs. An air-charged urodynamic catheter was introduced transurethrally as control for pressure measurements. The optimal physical configuration of the pill was investigated to maximize the containment in the bladder. We used two versions of external signal receivers (one waistband and one rectangular frame) to test the optimal external signal capture. Next to that, we performed short-term and medium-term comparative pressure studies. The in vitro static pressure measurement demonstrated a mean difference of less than 1 cm H2O between the methods. The optimal design of the pill for maximal retainment in the bladder proved to be a pigtail configuration. The bending of the device during bladder contractions caused offset of 2.7 +/- 1.4 cm H2O (mean +/- SD) on the pressure measurements. The rectangular frame performed signal capture during 5 consecutive voids with a good correlation of the pressure measurements. The device can be inserted through the urethra and is retrieved using string or endoscopic extraction. In conclusion, wireless long-term measurement of bladder pressure is demonstrated and yields comparable results to current available catheter methods of measurement in a pig model.
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He YL, Chen Y, Wen YB, Zhai RQ, Ma Y, Wang JJ, Pu QS, Sihoe JD, Franco I, Wen JG. Changes in bladder function with time following cystostomy in rats. Neurourol Urodyn 2019; 39:565-575. [PMID: 31782979 DOI: 10.1002/nau.24241] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 11/11/2019] [Indexed: 02/04/2023]
Affiliation(s)
- Yu Lin He
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Yan Chen
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Yi Bo Wen
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Rong Qun Zhai
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Yuan Ma
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Jian Jian Wang
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Qing Song Pu
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Jennifer D. Sihoe
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Israel Franco
- Department of Urology Yale University New Haven Connecticut
| | - Jian Guo Wen
- Department of Urology, Pediatric Urodynamic Centre, The First Affiliated Hospital of Zhengzhou University Zhengzhou University Zhengzhou China
- Henan Joint International Pediatric Urodynamic Laboratory The First Affiliated Hospital of Zhengzhou University Zhengzhou China
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Aizawa N. [Afferent nerve activity in relation to bladder sensation]. Nihon Yakurigaku Zasshi 2019; 154:255-258. [PMID: 31735754 DOI: 10.1254/fpj.154.255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Bladder afferent nerves are composed by myelinated Aδ- and unmyelinated C-fibers. During the storage phase of urine, distention of the bladder has long been considered to evoke afferent activity via Aδ-fibers connected in series with the smooth muscle fibers. In contrast, a previous study in cats revealed that more than 90% of C-fibers do not respond to normal bladder distension, being so called 〝silent〟 fibers. However, at least in rats, C-fibers can respond to normal bladder distension like Aδ-fibers, although they may also fulfill a potentially different role in the bladder sensory function in response to abnormal stimuli. The symptoms of overactive bladder (OAB) or interstitial cystitis (IC) are believed to be commonly related to the sensory (afferent) function. In addition, it has been suggested that bladder myogenic microcontractions or micromotions may partly contribute to the development of urgency in OAB related to bladder outlet obstruction (BOO), which is one of cause of benign prostatic hyperplasia (BPH). We have investigated the direct effects of drugs (anticholinergics, β3-adrenoceptor agonists, α1-adrenoceptor antagonists, PDE type5 inhibitors, etc.) on the bladder afferent function in rodents. In our results, almost all drugs may act on the bladder afferent function, and some of drug (e.g. mirabegron) inhibits the afferent activities through the suppression of the bladder myogenic microcontractions in normal or pathophysiological conditions.
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Affiliation(s)
- Naoki Aizawa
- Department of Continence Medicine, The University of Tokyo Graduate School of Medicine.,Present address: Department of Pharmacology and Toxicology, Dokkyo Medical University School of Medicine
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Liu TT, Rodgers AC, Nicholson TM, Macoska JA, Marker PC, Vezina CM, Bjorling DE, Roldan-Alzate A, Hernando D, Lloyd GL, Hacker TA, Ricke WA. Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing. J Vis Exp 2019:10.3791/59802. [PMID: 31475976 PMCID: PMC7328372 DOI: 10.3791/59802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The incidence of clinical benign prostatic hyperplasia (BPH) and lower urinary tract symptoms (LUTS) is increasing due to the aging population, resulting in a significant economic and quality of life burden. Transgenic and other mouse models have been developed to recreate various aspects of this multifactorial disease; however, methods to accurately quantitate urinary dysfunction and the effectiveness of new therapeutic options are lacking. Here, we describe a method that can be used to measure bladder volume and detrusor wall thickness, urinary velocity, void volume and void duration, and urethral diameter. This would allow for the evaluation of disease progression and treatment efficacy over time. Mice were anesthetized with isoflurane, and the bladder was visualized by ultrasound. For non-contrast imaging, a 3D image was taken of the bladder to calculate volume and evaluate shape; the bladder wall thickness was measured from this image. For contrast-enhanced imaging, a catheter was placed through the dome of the bladder using a 27-gauge needle connected to a syringe by PE50 tubing. A bolus of 0.5 mL of contrast was infused into the bladder until a urination event occurred. Urethral diameter was determined at the point of the Doppler velocity sample window during the first voiding event. Velocity was measured for each subsequent event yielding a flow rate. In conclusion, high frequency ultrasound proved to be an effective method for assessing bladder and urethral measurements during urinary function in mice. This technique may be useful in the assessment of novel therapies for BPH/LUTS in an experimental setting.
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Affiliation(s)
- Teresa T Liu
- Department of Urology, University of Wisconsin-Madison; K12 Kure, University of Wisconsin-Madison
| | - Allison C Rodgers
- Cardiovascular Research Center, Department of Medicine, University of Wisconsin-Madison
| | | | - Jill A Macoska
- University of Massachusetts Boston; U54 George M. O'Brien Center, University of Wisconsin-Madison
| | - Paul C Marker
- U54 George M. O'Brien Center, University of Wisconsin-Madison; College of Pharmacy, University of Wisconsin-Madison
| | - Chad M Vezina
- U54 George M. O'Brien Center, University of Wisconsin-Madison; School of Veterinary Medicine, University of Wisconsin-Madison
| | - Dale E Bjorling
- U54 George M. O'Brien Center, University of Wisconsin-Madison; School of Veterinary Medicine, University of Wisconsin-Madison
| | - Alejandro Roldan-Alzate
- K12 Kure, University of Wisconsin-Madison; Department of Mechanical Engineering, University of Wisconsin-Madison; Department of Radiology, University of Wisconsin-Madison
| | - Diego Hernando
- Department of Radiology, University of Wisconsin-Madison; Department of Medical Physics, University of Wisconsin-Madison
| | | | - Timothy A Hacker
- Cardiovascular Research Center, Department of Medicine, University of Wisconsin-Madison
| | - William A Ricke
- Department of Urology, University of Wisconsin-Madison; U54 George M. O'Brien Center, University of Wisconsin-Madison;
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Li Y, He M, Lin W, Xiang Z, Huang J, Xu P, Shi Y, Wang H. Responses of bladder smooth muscle to the stretch go through extracellular signal-regulated kinase (ERK)/p90 ribosomal S6 protein kinase (p90RSK)/Nuclear factor-κB (NF-κB) Pathway. Neurourol Urodyn 2019; 38:1504-1516. [PMID: 31033016 DOI: 10.1002/nau.24003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 01/01/2023]
Abstract
AIMS The present study was designed to study changes and its potential mechanisms in human bladder smooth muscle subjected to stretch. METHODS Bioinformatics analyses including differential expression analysis, overrepresentation enrichment analysis, principal component analysis, and weighted gene coexpression network analysis were used to analyze a microarray dataset (GSE47080) of partial bladder outlet obstruction (pBOO) in rat to find the potential changes of gene expressions. Bladder from pBOO model and human bladder smooth muscle cells (HBSMCs) subjected to sustained prolonged stretch were collected for Western blot analysis, real-time polymerase chain reaction, and fluorescence analysis to verify the changes of gene expressions and preliminarily study the potential role of signaling pathway regulation in treatment of pBOO. RESULTS The bioinformatics analysis showed that chronic obstruction activated mitogen-activated protein kinase pathway and changed cytoskeleton structure in bladder smooth muscle. In in vivo experiments in mice, pBOO was verified by cystometry. Partial BOO activated the extracellular signal-regulated kinase (ERK)/p90 ribosomal S6 protein kinase (p90RSK)/nuclear factor-κB (NF-κB) signaling pathway in DM. The messenger RNA (mRNA) expressions of contractile phenotypic proteins increased after pBOO. In in vitro experiments of HBSMCs, mechanical stretch activated ERK/p90RSK/NF-κB in HBSMCs in a time-dependent manner. The mRNA expressions of α-smooth muscle actin and SM22 also increased and filamentous actin (F-actin) polymerization was enhanced as well. Inhibition of ERK/p90RSK/NF-κB pathway reversed mechanical stretch-induced changes of contractile phenotypic expression and F-action polymerization. CONCLUSIONS Continuous stretch increases expressions of contractile phenotypic proteins and promotes the polymerization of F-actin. This process partially goes through ERK/p90RSK/NF-κB pathway.
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Affiliation(s)
- Yaohui Li
- Department of Urology, Zhongshan Hospital, Shanghai, China
| | - Minke He
- Department of Urology, Zhongshan Hospital, Shanghai, China
| | - Wenyao Lin
- Department of Urology, Zhongshan Hospital Xuhui Branch, Shanghai, China
| | - Zhuoyi Xiang
- Department of Urology, Zhongshan Hospital, Shanghai, China
| | - Jiaqi Huang
- Department of Urology, Zhongshan Hospital, Shanghai, China
| | - Peirong Xu
- Department of Urology, Zhongshan Hospital, Shanghai, China
| | - Yi Shi
- Zhongshan Hospital Institute of Clinical Science, Zhongshan Hospital, Shanghai, China
| | - Hang Wang
- Department of Urology, Zhongshan Hospital, Shanghai, China
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Carvalho MFD, Pamplona TL, Barreira MA, Fechine FVJ, Gonzaga-Silva LF, Oliveira RRMD. Effect of co-administration of BRL-37344 and tadalafil on reduction of overactive bladder symptoms after induction of detrusor overactivity in mice1. Acta Cir Bras 2019; 34:e201900205. [PMID: 30843938 PMCID: PMC6585915 DOI: 10.1590/s0102-8650201900205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/14/2019] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate the impact of the combination of BRL 37344 and tadalafil (TDF) on the reduction of overactive bladder (OB) symptoms. METHODS Thirty mice were randomized into 5 groups (G) of 6 animals each. L-NAME was used to induce DO. G1: Control; G2: L-NAME; G3: L-NAME + TDF; G4: L-NAME + BRL 37344; G5: L-NAME + TDF + BRL 37344. After 30 days of treatment, the animals were submitted to cystometry to evaluate non-voiding contractions (NVC), threshold pressure (TP), baseline pressure (BP), frequency of micturition (FM) and threshold volume (TV). Differences between the groups were analyzed with ANOVA followed by the Tukey test. RESULTS NVC increased in G2 (4.33±2.58) in relation to G1 (1.50±0.55). NVC decreased in G3 (2.00±1.10), G4 (1.50±1.52) and G5 (2.00±1.26) compared to G2 (p<0.05). FM decreased in G3 (0.97±0.71), G4 (0.92±0.38) and G5 (1.05±0.44) compared to G2 (p<0.05). However, the combination of TDF and BRL37344 was not more effective at increasing NVC and improving FM than either drug alone. The five groups did not differ significantly with regard to TV. CONCLUSION The combination of BRL 37344 and TDF produced no measurable additive effect on reduction of OB symptoms.
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Affiliation(s)
- Marcos Fiuza de Carvalho
- Fellow Master degree, Postgraduate Program in Medical Surgical Sciences, Universidade Federal do Ceará (UFC), Fortaleza-CE, Brazil. Conception and design of the study; technical procedures; acquisition, interpretation and analysis of data; manuscript preparation and writing
| | | | - Márcio Alencar Barreira
- Fellow PhD degree, Postgraduate Program in Medical Surgical Sciences, UFC, Fortaleza-CE, Brazil. Manuscript preparation and writing, critical revision
| | - Francisco Vagnaldo Jacuru Fechine
- PhD, Researcher, Nucleus of Research and Development of Medicines, Department of Pharmacology, UFC, Fortaleza-CE, Brazil. Analysis and interpretation of data, statistical analysis
| | - Lúcio Flávio Gonzaga-Silva
- PhD, Urologist, Department of Surgery, UFC, Fortaleza-CE, Brazil. Conception and design of the study, interpretation and analysis of data, critical revision, final approval
| | - Ricardo Reges Maia de Oliveira
- PhD, Urologist, Department of Surgery, UFC, Fortaleza-CE, Brazil. Conception and design of the study, interpretation and analysis of data, critical revision, final approval
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Dewulf K, Weyne E, Gevaert T, Deruyver Y, Voets T, Ridder DD, Everaerts W, Albersen M. Functional and molecular characterisation of the bilateral pelvic nerve crush injury rat model for neurogenic detrusor underactivity. BJU Int 2019; 123:E86-E96. [DOI: 10.1111/bju.14649] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Karel Dewulf
- Laboratory of Experimental Urology; Department of Development and Regeneration; KU Leuven; Leuven Belgium
| | - Emmanuel Weyne
- Laboratory of Experimental Urology; Department of Development and Regeneration; KU Leuven; Leuven Belgium
| | - Thomas Gevaert
- Laboratory of Experimental Urology; Department of Development and Regeneration; KU Leuven; Leuven Belgium
- Department of Imaging and Pathology; Translational Cell and Tissue Research; KU Leuven; Leuven Belgium
| | - Yves Deruyver
- Laboratory of Ion Channel Research; Department of Cellular and Molecular Medicine; KU Leuven; Leuven Belgium
- TRP Channel Research Platform Leuven (TRPLe); KU Leuven; Leuven Belgium
| | - Thomas Voets
- Laboratory of Ion Channel Research; Department of Cellular and Molecular Medicine; KU Leuven; Leuven Belgium
- TRP Channel Research Platform Leuven (TRPLe); KU Leuven; Leuven Belgium
- VIB Center for Brain& Disease Research; KU Leuven; Leuven Belgium
| | - Dirk De Ridder
- Laboratory of Experimental Urology; Department of Development and Regeneration; KU Leuven; Leuven Belgium
- TRP Channel Research Platform Leuven (TRPLe); KU Leuven; Leuven Belgium
| | - Wouter Everaerts
- Laboratory of Experimental Urology; Department of Development and Regeneration; KU Leuven; Leuven Belgium
- TRP Channel Research Platform Leuven (TRPLe); KU Leuven; Leuven Belgium
| | - Maarten Albersen
- Laboratory of Experimental Urology; Department of Development and Regeneration; KU Leuven; Leuven Belgium
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Chakrabarty B, Bijos DA, Vahabi B, Clavica F, Kanai AJ, Pickering AE, Fry CH, Drake MJ. Modulation of Bladder Wall Micromotions Alters Intravesical Pressure Activity in the Isolated Bladder. Front Physiol 2019; 9:1937. [PMID: 30687132 PMCID: PMC6335571 DOI: 10.3389/fphys.2018.01937] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 12/21/2018] [Indexed: 12/20/2022] Open
Abstract
Micromotions are phasic contractions of the bladder wall. During urine storage, such phasic activity has little effect on intravesical pressure, however, changed motile activity may underlie urodynamic observations such as detrusor overactivity. The potential for bladder motility to affect pressure reflects a summation of the overall movements, comprising the initiation, propagation, and dissipation components of micromotions. In this study, the influence of initiation of micromotions was investigated using calcium activated chloride channel blocker niflumic acid, and the effect of propagation using blockers of gap junctions. The overall bladder tone was modulated using isoprenaline. Isolated tissue strips and whole bladder preparations from juvenile rats were used. 18β-glycyrrhetinic acid was used to block gap junctions, reducing the amplitude and frequency of micromotions in in vitro and ex vivo preparations. Niflumic acid reduced the frequency of micromotions but had no effect on the amplitude of pressure fluctuations. Isoprenaline resulted in a reduction in pressure fluctuations and a decrease in pressure baseline. Using visual video data analysis, bladder movement was visible, irrespective of lack of pressure changes, which persisted during bladder relaxation. However, micromotions propagated over shorter distances and the overall bladder tone was reduced. All these results suggest that phasic activity of the bladder can be characterised by a combination of initiation and propagation of movement, and overall bladder tone. At any given moment, intravesical pressure recordings are an integration of these parameters. This synthesis gives insight into the limitations of clinical urodynamics, where intravesical pressure is the key indicator of detrusor activity.
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Affiliation(s)
- Basu Chakrabarty
- School of Physiology, Pharmacology and Neuroscience, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom
| | - Dominika A Bijos
- Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom.,Southmead Hospital, Bristol Urological Institute, Bristol, United Kingdom
| | - Bahareh Vahabi
- Department of Applied Sciences, University of West England, Bristol, Bristol, United Kingdom
| | - Francesco Clavica
- ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Anthony J Kanai
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Anthony E Pickering
- School of Physiology, Pharmacology and Neuroscience, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom.,Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Christopher H Fry
- School of Physiology, Pharmacology and Neuroscience, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom
| | - Marcus J Drake
- Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom.,Southmead Hospital, Bristol Urological Institute, Bristol, United Kingdom
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64
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Mickle AD, Won SM, Noh KN, Yoon J, Meacham KW, Xue Y, McIlvried LA, Copits BA, Samineni VK, Crawford KE, Kim DH, Srivastava P, Kim BH, Min S, Shiuan Y, Yun Y, Payne MA, Zhang J, Jang H, Li Y, Lai HH, Huang Y, Park SI, Gereau RW, Rogers JA. A wireless closed-loop system for optogenetic peripheral neuromodulation. Nature 2019; 565:361-365. [PMID: 30602791 PMCID: PMC6336505 DOI: 10.1038/s41586-018-0823-6] [Citation(s) in RCA: 236] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/14/2018] [Indexed: 11/18/2022]
Abstract
The fast-growing field of bioelectronic medicine aims to develop engineered systems that relieve clinical conditions through stimulation of the peripheral nervous system (PNS)1–5. Technologies of this type rely largely on electrical stimulation to provide neuromodulation of organ function or pain. One example is sacral nerve stimulation to treat overactive bladder, urinary incontinence and interstitial cystitis/bladder pain syndrome4,6,7. Conventional, continuous stimulation protocols, however, cause discomfort and pain, particularly when treating symptoms that can be intermittent in nature (e.g. sudden urinary urgency)8. Direct physical coupling of electrodes to the nerve can lead to injury and inflammation9–11. Furthermore, typical therapeutic stimulators target large nerve bundles that innervate multiple structures, resulting in a lack of organ specificity. This paper introduces a miniaturized bio-optoelectronic implant that avoids these limitations, via the use of (1) an optical stimulation interface that exploits microscale inorganic light emitting diodes (μ-ILEDs) to activate opsins, (2) a soft, precision biophysical sensor system that allows continuous measurements of organ function, and (3) a control module and data analytics approach that allows coordinated, closed-loop operation of the system to eliminate pathological behaviors as they occur in real-time. In an example reported here, a soft strain gauge yields real-time information on bladder function. Data analytics algorithms identify pathological behavior, and automated, closed-loop optogenetic neuromodulation of bladder sensory afferents normalize bladder function in the context of acute cystitis. This all-optical scheme for neuromodulation offers chronic stability and the potential for cell-type-specific stimulation.
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Affiliation(s)
- Aaron D Mickle
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Sang Min Won
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Kyung Nim Noh
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Jangyeol Yoon
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Kathleen W Meacham
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Yeguang Xue
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.,Mechanical Engineering, Northwestern University, Evanston, IL, USA.,Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Lisa A McIlvried
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Bryan A Copits
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Vijay K Samineni
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Kaitlyn E Crawford
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL, USA
| | - Do Hoon Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Paulome Srivastava
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Bong Hoon Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.,Materials Science and Engineering, Northwestern University, Evanston, IL, USA.,Simpson Querrey Institute, Northwestern University, Chicago, IL, USA.,Center for Bio-integrated Electronics, Northwestern University, Evanston, IL, USA
| | - Seunghwan Min
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Young Shiuan
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA
| | - Yeojeong Yun
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Maria A Payne
- Washington University School of Medicine, St Louis, MO, USA.,Washington University Department of Surgery - Division of Urologic Surgery, St Louis, MO, USA
| | - Jianpeng Zhang
- Institute of Solid Mechanics, Beihang University (BUAA), Beijing, China
| | - Hokyung Jang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Yuhang Li
- Institute of Solid Mechanics, Beihang University (BUAA), Beijing, China
| | - H Henry Lai
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA.,Washington University School of Medicine, St Louis, MO, USA.,Washington University Department of Surgery - Division of Urologic Surgery, St Louis, MO, USA
| | - Yonggang Huang
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.,Mechanical Engineering, Northwestern University, Evanston, IL, USA.,Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Sung-Il Park
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA
| | - Robert W Gereau
- Washington University Pain Center and Department of Anesthesiology, Washington University, St Louis, MO, USA. .,Washington University School of Medicine, St Louis, MO, USA.
| | - John A Rogers
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA. .,Mechanical Engineering, Northwestern University, Evanston, IL, USA. .,Materials Science and Engineering, Northwestern University, Evanston, IL, USA. .,Simpson Querrey Institute, Northwestern University, Chicago, IL, USA. .,Center for Bio-integrated Electronics, Northwestern University, Evanston, IL, USA. .,Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA. .,Department of Chemistry, Northwestern University, Evanston, IL, USA. .,Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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65
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Improved voiding function by deep brain stimulation in traumatic brain-injured animals with bladder dysfunctions. Int Urol Nephrol 2018; 51:41-52. [PMID: 30474784 DOI: 10.1007/s11255-018-2028-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 11/07/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Traumatic brain injury (TBI) is a global scenario with high mortality and disability, which does not have an effectual and approved therapy till now. Bladder dysfunction is a major symptom after TBI, and this study deals with the alleviation of bladder function in TBI rats, with the aid of deep brain stimulations (DBS). METHODS TBI was induced by weight drop model (WDM) and standardized with the experimental subjects with variable heights for weight dropping. The rats survived after TBI were considered for bladder dysfunction observations. DBS with variable stimulation parameters like cystometric analysis and MRI studies were also performed. RESULTS After experimental studies, TBI 2-m-height crash was determined as suitable parameter due to minimal mortality rate and significant reduction in the voiding efficiency from 67 to 28%, whereas DBS significantly reversed the value of voiding efficiency to 65-84%. MRI studies revealed the severity of TBI impact and DBS localization. CONCLUSION The results showed profound therapeutic effect of PnO-DBS on voiding functions and bladder control on TBI rats.
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Chang HH, Yeh JC, Mao J, Ginsberg DA, Ghoniem G, Rodriguez LV. Spinal cord stimulation ameliorates detrusor over-activity and visceromotor pain responses in rats with cystitis. Neurourol Urodyn 2018; 38:116-122. [PMID: 30411810 DOI: 10.1002/nau.23827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 09/04/2018] [Indexed: 01/07/2023]
Abstract
AIM Interstitial cystitis/painful bladder syndrome/(IC/PBS) results in recurring pain in the bladder and surrounding pelvic region caused by abnormal excitability of micturition reflexes. Spinal cord stimulation (SCS) is currently clinically used for the attenuation of neuropathic and visceral pain. The present study examined whether SCS at upper lumbar segments modulates detrusor overactivity and visceral hyperalgesia associated with cystitis in a rat model of cyclophosphamide (CYP)-induced cystitis. METHODS Cystitis was induced by intraperitoneal injection of CYP (200 mg/kg) in six adult female Sprague Dawley rats 48 h prior to urodynamic recordings. Another six rats served as-controls with saline injection. Cystometry and the external urethral sphincter (EUS) electromyography during bladder infusion were evaluated under urethane anesthesia. The visceromotor reflexes (VMR) obtained from the external abdominal oblique muscle were quantified during bladder infusion and isotonic bladder distension (IBD), respectively. After baseline recordings were taken, SCS was applied on the dorsal surface of L3 for 25 min. Urodynamic recordings and VMR during bladder infusion and IBD were repeated 2 h after SCS. RESULTS CYP resulted in detrusor overactivity, stronger EUS tonic contractions, and increased VMR. SCS significantly reduced non-voiding contractions, prolonged EUS relaxation, and delayed VMR appearance during bladder infusion as well as significantly decreased VMR during IBD in cystitis rats. CONCLUSION SCS improved bladder function and EUS relaxation during bladder infusion and significantly attenuated visceral nociceptive-related VMR during IBD in cystitis rats. SCS may have therapeutic potential for patients with hyperalgesia and IC/PBS.
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Affiliation(s)
- Huiyi H Chang
- Department of Urology, University of California Irvine, Irvine, California.,Reeve-Irvine Research Center, University of California Irvine, Irvine, California
| | - Jih-Chao Yeh
- Department of Urology, University of Southern California, Los Angeles, California
| | - Jackie Mao
- Department of Urology, University of Southern California, Los Angeles, California
| | - David A Ginsberg
- Department of Urology, University of Southern California, Los Angeles, California
| | - Gamal Ghoniem
- Department of Urology, University of California Irvine, Irvine, California
| | - Larissa V Rodriguez
- Department of Urology, University of Southern California, Los Angeles, California
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Attenuated lipopolysaccharide-induced inflammatory bladder hypersensitivity in mice deficient of transient receptor potential ankilin1. Sci Rep 2018; 8:15622. [PMID: 30353098 PMCID: PMC6199359 DOI: 10.1038/s41598-018-33967-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 10/09/2018] [Indexed: 11/08/2022] Open
Abstract
Transient receptor potential ankyrin 1 (TRPA1) channel expressed by urothelial cells and bladder sensory nerve fibers might act as a bladder mechanosensor and nociceptive transducer. To disclose the role of TRPA1 in bladder function and inflammation-associated hypersensitivity, we evaluated in vitro and in vivo bladder function and inflammatory mechanosensory and nociceptive responses to intravesical lipopolysaccharide (LPS)-instillation in wild type (WT) and TRPA1-knock out (KO) mice. At baseline before treatment, no significant differences were observed in frequency volume variables, in vitro detrusor contractility, and cystometric parameters between the two groups in either sex. LPS-instillation significantly increased voiding frequency and decreased mean voided volume at 24-48 hours after instillation in WT but not in TRPA1-KO mice. LPS-instillation also significantly increased the number of pain-like behavior at 24 hours after instillation in WT mice, but not in TRPA1-KO mice. Cystometry 24 hours after LPS-instillation revealed shorter inter-contraction intervals in the WT mice compared with TRPA1-KO mice. In contrast, inflammatory cell infiltration in the bladder suburothelial layer was not significantly different between the two groups. These results indicate that TRPA1 channels are involved in bladder mechanosensory and nociceptive hypersensitivity accompanied with inflammation but not in physiological bladder function or development of bladder inflammation.
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68
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The Effect of Xialiqi Capsule on Testosterone-Induced Benign Prostatic Hyperplasia in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:5367814. [PMID: 30364022 PMCID: PMC6186362 DOI: 10.1155/2018/5367814] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 09/13/2018] [Indexed: 01/04/2023]
Abstract
Benign prostatic hyperplasia (BPH) is common among elderly men, of which inflammation, oxidative stress, proliferative, and apoptotic changes play important roles. Xialiqi (XLQ) capsule, a traditional Chinese herbal formula, is used as a potential drug in treating BPH. This study aims to evaluate the therapeutic effect of XLQ capsule on testosterone propionate- (TP-) induced BPH in rats. Fifty male Sprague-Dawley rats were randomly divided into 5 groups: sham control, BPH model, high and low dose of XLQ, and finasteride as a positive control group. All groups were treated with appropriate drugs/normal saline for 28 consecutive days. Prostate weights were recorded; histopathological changes and content of IL-8, TNF-α, DHT, SOD, MDA, caspase-3, and PCNA of the prostate were determined. Animals with BPH demonstrated significantly increased prostate weights and prostate index, higher levels of IL-8, TNF-α, DHT, MDA, and PCNA, but lower activity of SOD and reduced expression of caspase-3. After treatment with XLQ, significant reductions of prostate weights, prostate index, IL-8, TNF-α, DHT, MDA, and PCNA, increased activity of SOD, and higher level of caspase-3 were shown. The present study indicates that XLQ can effectively prevent the development of TP-induced BPH model through mechanisms of anti-inflammation, antioxidation, antiproliferation, and proapoptosis.
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69
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Wang X, Cao N, Ni J, Si J, Gu B, Karl-Erik A. Effect of 5-HT 2A receptor antagonist ketanserin on micturition in male rats. Neurosci Lett 2018; 687:196-201. [PMID: 30278246 DOI: 10.1016/j.neulet.2018.09.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 09/19/2018] [Accepted: 09/25/2018] [Indexed: 12/18/2022]
Abstract
OBJECTIVES This study aimed to investigate the effects of ketanserin on micturition mediated via the 5-HT2A receptor in the motoneuron nucleus of the Lumbosacral cord, as reflected in high frequency oscillations (HFOs) of intravesical pressure and the external urethral sphincter electromyogram (EUS-EMG) in anesthetized male rats. METHODS:: Male Sprague-Dawley rats were used. Cystometry and EUS-EMG were performed in all rats under urethane anesthesia to examine the variations after successive intrathecal (i.t.) administration of various doses of ketanserin into the lumbosacral cord. Immunofluorescence staining and Western blotting were made to observe the distribution of 5-HT2 A and -2C receptors in the lumbosacral cord motor neurons. RESULTS Compared to the controls, ketanserin-treated rats showed a declined trend of dose-dependent manner in the HFOs, in accordance with the variation of EUS-EMG, while decreased micturition volume, voiding efficiency, and increased post-void residual volume was only observed at the dose of 0.1 mg/kg. The effects of ketanserin on the HFO and EUS-EMG activity were partially or completely reversed by the 5-HT2A/2C receptor agonist, DOI. Meanwhile, immunofluorescence staining and Western blot analysis showed that immunoreactivity of 5-HT2A receptor was higher than that of 5-HT2C, labeling in the lumbosacral cord motoneurons. CONCLUSIONS The intrathecally administrated 5-HT2A receptor antagonist ketanserin can weaken the EUS bursting activity, decrease HFOs, and reduce voiding efficiency as dose dependently. The effects of ketanserin on micturition may be mainly mediated via the 5-HT2A receptors in the motoneuron nucleus of the lumbosacral cord.
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Affiliation(s)
- Xiaohu Wang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China; Department of Urology, Taizhou Hospital of Zhejiang Province, Linhai, China
| | - Nailong Cao
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jianshu Ni
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jiemin Si
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Baojun Gu
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
| | - Andersson Karl-Erik
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Medical Center, Winston Salem, NC, United States
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Ni J, Cao N, Wang X, Zhan C, Si J, Gu B, Andersson KE. The serotonin (5-hydroxytryptamine) 5-HT 7 receptor is up-regulated in Onuf's nucleus in rats with chronic spinal cord injury. BJU Int 2018; 123:718-725. [PMID: 29781566 DOI: 10.1111/bju.14405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To examine the effect of intrathecal (i.t.) serotonin (5-hydroxytryptamine) 5-HT7 agonist administration on voiding function in the urethane-anesthetised rat, and the change in 5-HT7 receptor (5-HT7 R) expression in the lumbosacral cord Onuf's nucleus after spinal cord injury (SCI). MATERIALS AND METHODS In all, 32 female Sprague-Dawley (SD) rats were equally divided into a spinally intact (SI) group and SCI group (n = 16 each). At 8 weeks after transection, half of the rats underwent continuous cystometry under urethane anaesthesia, and the 5-HT7 R-selective agonist LP44 was given (i.t.). The remaining rats were used for pseudorabies (PRV) retrograde tracing, immunofluorescence, and Western Blot. RESULTS LP44 administered i.t. had no effect in the SI rats. In SCI rats, LP44 (1-30 μg/kg) induced significant dose-dependent increases in micturition volume, voiding efficiency, number of high-frequency oscillations per micturition; and decreases in residual volume, bladder capacity, peak bladder pressure, threshold pressure and non-voiding contractions. The 5-HT7 R antagonist, SB-269970 (10 μg/kg), partially reversed LP44-induced changes. Using PRV retrograde tracing and immunofluorescence, 5-HT7 Rs were found in the L6-S1 spinal cord Onuf's nucleus in both SI and SCI rats, but the expression was significantly greater in the SCI rats. Western blot showed significantly more 5-HT7 Rs in the ventral L6-S1 spinal cord in SCI rats. CONCLUSION A 5-HT7 R agonist, given i.t., improved voiding efficiency in urethane-anesthetised SCI rats, and the 5-HT7 R was significantly up-regulated in the lumbosacral cord Onuf's nucleus. If valid for humans, these findings suggest that the 5-HT7 R could be a target for therapeutic interventions.
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Affiliation(s)
- Jianshu Ni
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Nailong Cao
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiaohu Wang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Changsheng Zhan
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jiemin Si
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Baojun Gu
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Karl-Erik Andersson
- Wake Forest Baptist Medical Center, Wake Forest Institute for Regenerative Medicine, Winston Salem, NC, USA
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Deruyver Y, Weyne E, Dewulf K, Rietjens R, Pinto S, Van Ranst N, Franken J, Vanneste M, Albersen M, Gevaert T, Vennekens R, De Ridder D, Voets T, Everaerts W. Intravesical Activation of the Cation Channel TRPV4 Improves Bladder Function in a Rat Model for Detrusor Underactivity. Eur Urol 2018; 74:336-345. [PMID: 29875065 DOI: 10.1016/j.eururo.2018.05.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 05/15/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND Improvement of bladder emptying by modulating afferent nerve activity is an attractive therapeutic strategy for detrusor underactivity. Transient receptor potential vanilloid 4 (TRPV4) is a sensory ion channel in urothelial cells that contribute to the detection of bladder filling. OBJECTIVE To investigate the potential benefit of intravesical TRPV4 agonists in a pelvic nerve injury rat model for detrusor underactivity. DESIGN, SETTING, AND PARTICIPANTS Female wild-type and Trpv4 knockout rats underwent sham surgery or bilateral pelvic nerve injury (bPNI). Four weeks later, rats underwent cystometry with infusion of the TRPV4 agonist GSK1016790A. Bladders were harvested for in vitro pharmacological studies, quantitative reverse polymerase chain reaction and immunohistochemistry. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Data are expressed as median ± interquartile range. Statistical comparisons were made using the Mann-Witney U test and Wilcoxon signed rank test as appropriate. RESULTS AND LIMITATIONS Rats with bPNI showed a phenotype characteristic of detrusor underactivity with lower-amplitude voiding contractions, decreased voiding frequency, and increased postvoid residual. Intravesical application of GSK1016790A increased voiding frequency and reduced postvoid residual in wild-type, but not Trpv4-/-, rats. In isolated bladder strips, GSK1016790A did not induce relevant contractions, indicating that the observed improvements in bladder function are the result of increased afferent signalling through TRPV4 activation, rather than a local effect on the detrusor. The altered urinary phenotype of Trpv4-/- mice was not apparent in the Trpv4-/- rat model, suggesting species-related functional variations. Our results are limited to the preclinical setting in rodents. CONCLUSIONS Intravesical activation of TRPV4 improves bladder dysfunction after bPNI by increasing afferent signalling. PATIENT SUMMARY We demonstrate that the sensory protein transient receptor potential vanilloid 4 (TRPV4) can be targeted to improve bladder function in animals that have iatrogenic injury to the nerves innervating the bladder. Further research is required to determine whether these results can be translated to patients with an underactive bladder.
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Affiliation(s)
- Yves Deruyver
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium
| | - Emmanuel Weyne
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Karel Dewulf
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Roma Rietjens
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium
| | - Silvia Pinto
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Nele Van Ranst
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Jan Franken
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium
| | - Matthias Vanneste
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Maarten Albersen
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Thomas Gevaert
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Translational Cell and Tissue Research, Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
| | - Rudi Vennekens
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Dirk De Ridder
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium
| | - Thomas Voets
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Wouter Everaerts
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; TRP Channel Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium.
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Synergistic Activities of Abdominal Muscles Are Required for Efficient Micturition in Anesthetized Female Mice. Int Neurourol J 2018; 22:9-19. [PMID: 29609424 PMCID: PMC5885134 DOI: 10.5213/inj.1835052.526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 01/30/2018] [Indexed: 01/23/2023] Open
Abstract
Purpose To characterize the electromyographic activity of abdominal striated muscles during micturition in urethane-anesthetized female mice, and to quantitatively evaluate the contribution of abdominal responses to efficient voiding. Methods Cystometric and multichannel electromyographic recordings were integrated to enable a comprehensive evaluation during micturition in urethane-anesthetized female mice. Four major abdominal muscle domains were evaluated: the external oblique, internal oblique, and superior and inferior rectus abdominis. To further characterize the functionality of the abdominal muscles, pancuronium bromide (25 μg/mL or 50 μg/mL, abdominal surface) was applied as a blocking agent of neuromuscular junctions. Results We observed a robust activation of the abdominal muscles during voiding, with a consistent onset/offset concomitant with the bladder pressure threshold. Pancuronium was effective, in a dose-dependent fashion, for partial and complete blockage of abdominal activity. Electromyographic discharges during voiding were significantly inhibited by applying pancuronium. Decreased cystometric parameters were recorded, including the peak pressure, pressure threshold, intercontractile interval, and voiding duration, suggesting that the voiding efficiency was significantly compromised by abdominal muscle relaxation. Conclusions The relevance of the abdominal striated musculature for micturition has remained a topic of debate in human physiology. Although the study was performed on anesthetized mice, these results support the existence of synergistic abdominal electromyographic activity facilitating voiding in anesthetized mice. Further, our study presents a rodent model that can be used for future investigations into micturition-related abdominal activity.
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Velasquez Flores M, Mossa AH, Cammisotto P, Campeau L. Bladder overdistension with polyuria in a hypertensive rat model. Neurourol Urodyn 2018; 37:1904-1912. [DOI: 10.1002/nau.23550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 02/13/2018] [Indexed: 12/24/2022]
Affiliation(s)
- Monica Velasquez Flores
- Department of Surgery; Division of Urology; McGill University; Montreal Québec Canada
- Lady Davis Institute for Medical Research; Montreal Québec Canada
| | - Abubakr H. Mossa
- Department of Surgery; Division of Urology; McGill University; Montreal Québec Canada
- Lady Davis Institute for Medical Research; Montreal Québec Canada
| | | | - Lysanne Campeau
- Department of Surgery; Division of Urology; McGill University; Montreal Québec Canada
- Lady Davis Institute for Medical Research; Montreal Québec Canada
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74
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Aizawa N, Watanabe D, Fukuhara H, Fujimura T, Kume H, Homma Y, Igawa Y. Inhibitory effects of silodosin on the bladder mechanosensitive afferent activities and their relation with bladder myogenic contractions in male rats with bladder outlet obstruction. Neurourol Urodyn 2018; 37:1897-1903. [DOI: 10.1002/nau.23547] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 02/06/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Naoki Aizawa
- Department of Continence Medicine; The University of Tokyo Graduate School of Medicine; Tokyo Japan
| | - Daiji Watanabe
- Department of Continence Medicine; The University of Tokyo Graduate School of Medicine; Tokyo Japan
| | - Hiroshi Fukuhara
- Department of Urology; The University of Tokyo Graduate School of Medicine; Tokyo Japan
| | - Tetsuya Fujimura
- Department of Urology; The University of Tokyo Graduate School of Medicine; Tokyo Japan
| | - Haruki Kume
- Department of Urology; The University of Tokyo Graduate School of Medicine; Tokyo Japan
| | - Yukio Homma
- Department of Urology; The University of Tokyo Graduate School of Medicine; Tokyo Japan
| | - Yasuhiko Igawa
- Department of Continence Medicine; The University of Tokyo Graduate School of Medicine; Tokyo Japan
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75
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Liu Q, Wu C, Huang S, Wu Q, Zhou T, Liu X, Liu X, Hu X, Li L. Decreased hyperpolarization-activated cyclic nucleotide-gated channels are involved in bladder dysfunction associated with spinal cord injury. Int J Mol Med 2018; 41:2609-2618. [PMID: 29436607 PMCID: PMC5846662 DOI: 10.3892/ijmm.2018.3489] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 02/08/2018] [Indexed: 12/12/2022] Open
Abstract
Spinal cord injury (SCI) leads to bereft voluntary control of bladder, but the possible role of spontaneous excited system in bladder of SCI patients is poorly understood. Hyper polarization-activated cyclic nucleotide-gated (HCN) channels are deemed to regulate the spontaneous contraction of bladder, our study explored the functional role of HCN channels in SCI induced neurogenic bladder. Sixty female Sprague-Dawley rats were randomized into control, sham and SCI groups. Rat models subjected to SCI at S2 levels were successfully established and were assessed using hematoxylin and eosin staining and cystometry. In SCI rats, the mRNA and protein expression levels of HCN channels and the Ih density were significantly reduced, and expression levels of several bladder HCN1 channel regulatory proteins were also significantly changed. The effects of 50 µM forskolin and 50 µM 8-bromoadenosine 3′,5′-cyclic monophosphate on [Ca2+]i of isolated bladder interstitial cells of Cajal-like cells were significantly decreased in SCI rats. The spontaneous contractions in detrusor strips from SCI rats were significantly weakened. Furthermore, detrusor strips from SCI rats exhibited decreased tolerance to two doses of ZD7288 (10 and 50 µM). Taken together, our results indicate that the decreased bladder HCN channel expression and function induced by altered regulatory proteins are involved in the pathological process of SCI induced neurogenic bladder, which present HCN channels as valid therapeutic targets for treating this disease.
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Affiliation(s)
- Qian Liu
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Chao Wu
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Shengquan Huang
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Qingjian Wu
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Tao Zhou
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Xiaobing Liu
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Xin Liu
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Xiaoyan Hu
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Longkun Li
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
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76
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Weyne E, Dewulf K, Deruyer Y, Rietjens R, Everaerts W, Bivalacqua TJ, De Ridder D, Van der Aa F, Albersen M. Characterization of voiding function and structural bladder changes in a rat model of neurogenic underactive bladder disease. Neurourol Urodyn 2018; 37:1594-1604. [PMID: 30105760 DOI: 10.1002/nau.23517] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 12/30/2017] [Indexed: 12/21/2022]
Abstract
OBJECTIVES To create an animal model for neurogenic underactive bladder disease (UAB) and identify markers to describe secondary myogenic changes in the bladder wall. MATERIALS AND METHODS Male rats underwent either bilateral pelvic nerve injury or sham surgery. Four weeks after surgery functional evaluation was performed and tissue was harvested. Functional evaluation consisted of analysis of voiding pattern, 24-h urine collection in a metabolic cage, in vivo cystometry and in-vitro contractile function assessment. PCR and immunohistochemical localization of different smooth muscle cell and extracellular matrix markers was performed on bladder strips. RESULTS After pelvic nerve injury, dry bladder weight increased and voiding contractions were absent, resulting in overflow incontinence. In-vitro contractile response to carbachol was decreased. This was paired with an upregulation of synthetic smooth muscle cell (SMC) markers mRNA expression such as retinol binding protein 1 (RBP1), myosin 10 (MYH10) and osteopontin (OPN), and a downregulation of contractile SMC marker smoothelin (SMTL). The SMTL/OPN mRNA ratio was 50 times higher in sham bladders compared to PNI bladders. CONCLUSIONS The loss of in-vivo and in-vitro contractile function following pelvic nerve transection is characterized by a switch from a contractile to synthetic SMC phenotype, which is best characterized by the ratio SMTL/OPN mRNA expression. Modulating this phenotypical switch is a potential target for the development of UAB therapy. We suggest for the first time a set of markers that may be useful to evaluate therapeutic strategies on improvements in bladder wall structure.
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Affiliation(s)
- Emmanuel Weyne
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
| | - Karel Dewulf
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
| | - Yves Deruyer
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
| | - Roma Rietjens
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Wouter Everaerts
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
| | - Trinity J Bivalacqua
- The James Buchanan Brady Urological Institute, Department of Urology, Johns Hopkins Medical Institutions, Baltimore, Maryland
| | - Dirk De Ridder
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
| | - Frank Van der Aa
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
| | - Maarten Albersen
- Laboratory for Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Urology, Univ;1;ersity Hospitals Leuven, Leuven, Belgium
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Age-related changes in function and gene expression of the male and female mouse bladder. Sci Rep 2018; 8:2089. [PMID: 29391518 PMCID: PMC5794976 DOI: 10.1038/s41598-018-20406-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/17/2018] [Indexed: 12/24/2022] Open
Abstract
We investigated age-related changes in in vivo and in vitro functions and gene expression of the bladder of male and female mice. Mature and aged (12 and 27–30 month old) C57BL/6 mice of both sexes were used. Frequency volume, conscious free-moving cystometry and detrusor contractile and relaxant properties in in vitro organ bath were evaluated. mRNA expression level of muscarinic, purinergic, and β-adrenergic receptors and gene expression changes by cDNA microarray analysis of the bladder were determined. Cystometry demonstrated storage and voiding dysfunctions with ageing in both sexes. Detrusor strips from aged mice showed weaker contractile responses particularly in the cholinergic component and weaker relaxant responses to isoproterenol. These age-related impairments were generally severer in males. mRNA expression of bladder tissue was decreased for M3 muscarinic receptors in aged males and β2-adrenoceptors in aged females. cDNA microarray analysis results, albeit substantial sex difference, indicated “cell-to-cell signaling and interaction” as the most common feature of age-related gene expression. In summary, aged mice demonstrated voiding and storage dysfunctions resembling to detrusor hyperactivity with impaired contractility (DHIC), which were more pronounced in males. Genomic changes associated with aging may contribute to the age-related bladder functional deterioration in mice.
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78
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Foditsch EE, Roider K, Sartori AM, Kessler TM, Kayastha SR, Aigner L, Schneider MP. Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements. J Vis Exp 2018. [PMID: 29443095 DOI: 10.3791/56506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Lower urinary tract function is mainly assessed by means of cystometric bladder function analysis in rodents. Conventional cystometries are usually performed as terminal analysis under urethane anesthesia. It is well known that anesthetic drugs can influence bladder function. Hence, the aim of this technique is to perform cystometric measurements of the urinary bladder and external urethral sphincter in lightly restrained awake rats. For this purpose, a bladder catheter is implanted into the bladder dome. Subsequently, two electrodes are implanted bilateral to the external urethral sphincter and a ground electrode is sutured to a non-responsive skeletal muscle. The bladder catheter and the three electrodes are finally tunneled subcutaneously to the neck region and affixed to a harness. With this technique, the lower urinary tract can be measured at multiple time points in the same animal to assess lower urinary tract function. The main application of this technique is the follow-up of simultaneous urinary bladder and external urethral sphincter function in awake healthy rats and after induction of a disease or injury. Moreover, subsequent lower urinary tract monitoring can be performed during evaluation of the disease/injury and to monitor treatment efficacy.
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Affiliation(s)
- Elena E Foditsch
- Department of Urology, Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University; Institute of Molecular Regenerative Medicine, Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University;
| | - Karin Roider
- Department of Urology, Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University; Institute of Molecular Regenerative Medicine, Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University
| | - Andrea M Sartori
- Brain Research Institute, University of Zürich; Department of Health Sciences and Technology, Swiss Federal Institute of Technology Zürich; Neuro-Urology, Spinal Cord Injury Center & Research, University of Zürich, Balgrist University Hospital
| | - Thomas M Kessler
- Neuro-Urology, Spinal Cord Injury Center & Research, University of Zürich, Balgrist University Hospital
| | - Sabik Raj Kayastha
- Department of Orthopaedics and Traumatology, Dhulikhel Hospital, Kathmandu University Hospital
| | - Ludwig Aigner
- Institute of Molecular Regenerative Medicine, Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University
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Deckmann K, Rafiq A, Erdmann C, Illig C, Durschnabel M, Wess J, Weidner W, Bschleipfer T, Kummer W. Muscarinic receptors 2 and 5 regulate bitter response of urethral brush cells via negative feedback. FASEB J 2018; 32:2903-2910. [PMID: 29401598 DOI: 10.1096/fj.201700582r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We have recently identified a cholinergic chemosensory cell in the urethral epithelium, urethral brush cell (UBC), that, upon stimulation with bitter or bacterial substances, initiates a reflex detrusor activation. Here, we elucidated cholinergic mechanisms that modulate UBC responsiveness. We analyzed muscarinic acetylcholine receptor (M1-5 mAChR) expression by using RT-PCR in UBCs, recorded [Ca2+]i responses to a bitter stimulus in isolated UBCs of wild-type and mAChR-deficient mice, and performed cystometry in all involved strains. The bitter response of UBCs was enhanced by global cholinergic and selective M2 inhibition, diminished by positive allosteric modulation of M5, and unaffected by M1, M3, and M4 mAChR inhibitors. This effect was not observed in M2 and M5 mAChR-deficient mice. In cystometry, M5 mAChR-deficient mice demonstrated signs of detrusor overactivity. In conclusion, M2 and M5 mAChRs attenuate the bitter response of UBC via a cholinergic negative autocrine feedback mechanism. Cystometry suggests that dysfunction, particularly of the M5 receptor, may lead to such symptoms as bladder overactivity.-Deckmann, K., Rafiq, A., Erdmann, C., Illig, C., Durschnabel, M., Wess, J., Weidner, W., Bschleipfer, T., Kummer, W. Muscarinic receptors 2 and 5 regulate bitter response of urethral brush cells via negative feedback.
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Affiliation(s)
- Klaus Deckmann
- Institute for Anatomy and Cell Biology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Amir Rafiq
- Institute for Anatomy and Cell Biology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Christian Erdmann
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Christian Illig
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Melanie Durschnabel
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Jürgen Wess
- Molecular Signaling Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Wolfgang Weidner
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Thomas Bschleipfer
- Clinic of Urology, Andrology, and Pediatric Urology, Weiden Hospital/Clinics of Nordoberpfalz AG, Weiden, Germany
| | - Wolfgang Kummer
- Institute for Anatomy and Cell Biology, Justus-Liebig-University Giessen, Giessen, Germany
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80
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Ito H, Drake MJ, Fry CH, Kanai AJ, Pickering AE. Characterization of mouse neuro-urological dynamics in a novel decerebrate arterially perfused mouse (DAPM) preparation. Neurourol Urodyn 2018; 37:1302-1312. [PMID: 29333621 PMCID: PMC5947622 DOI: 10.1002/nau.23471] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 11/20/2017] [Indexed: 12/18/2022]
Abstract
AIM To develop the decerebrate arterially perfused mouse (DAPM) preparation, a novel voiding model of the lower urinary tract (LUT) that enables in vitro-like access with in vivo-like neural connectivity. METHODS Adult male mice were decerebrated and arterially perfused with a carbogenated, Ringer's solution to establish the DAPM. To allow distinction between central and peripheral actions of interventions, experiments were conducted in both the DAPM and in a "pithed" DAPM which has no brainstem or spinal cord control. RESULTS Functional micturition cycles were observed in response to bladder filling. During each void, the bladder showed strong contractions and the external urethral sphincter (EUS) showed bursting activity. Both the frequency and amplitude of non-voiding contractions (NVCs) in DAPM and putative micromotions (pMM) in pithed DAPM increased with bladder filling. Vasopressin (>400 pM) caused dyssynergy of the LUT resulting in retention in DAPM as it increased tonic EUS activity and basal bladder pressure in a dose-dependent manner (basal pressure increase also noted in pithed DAPM). Both neuromuscular blockade (vecuronium) and autonomic ganglion blockade (hexamethonium), initially caused incomplete voiding, and both drugs eventually stopped voiding in DAPM. Intravesical acetic acid (0.2%) decreased the micturition interval. Recordings from the pelvic nerve in the pithed DAPM showed bladder distention-induced activity in the non-noxious range which was associated with pMM. CONCLUSIONS This study demonstrates the utility of the DAPM which allows a detailed characterization of LUT function in mice.
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Affiliation(s)
- Hiroki Ito
- School of Physiology, Pharmacology and Neuroscience, Faculty of Biomedical Sciences, University of Bristol, Bristol, United Kingdom
| | - Marcus J Drake
- School of Physiology, Pharmacology and Neuroscience, Faculty of Biomedical Sciences, University of Bristol, Bristol, United Kingdom
| | - Christopher H Fry
- School of Physiology, Pharmacology and Neuroscience, Faculty of Biomedical Sciences, University of Bristol, Bristol, United Kingdom
| | - Anthony J Kanai
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Anthony E Pickering
- School of Physiology, Pharmacology and Neuroscience, Faculty of Biomedical Sciences, University of Bristol, Bristol, United Kingdom
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81
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Electrical Activity of the Bladder Is Attenuated by Intravesical Inhibition of P2X2/3 Receptors During Micturition in Female Rats. Int Neurourol J 2017; 21:259-269. [PMID: 29298472 PMCID: PMC5756821 DOI: 10.5213/inj.1734998.499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 11/27/2017] [Indexed: 01/23/2023] Open
Abstract
Purpose To simultaneously monitor electrical discharges in various bladder regions and the external urethral sphincter (EUS) during voiding contractions, and to assess the functional role of myogenic modulation of the lower urinary tract (LUT) by ionotropic purinergic receptors containing the P2X3 subunit. Methods Female Sprague-Dawley rats were anesthetized with urethane, and implanted with a suprapubic catheter for open cystometry. Flexible microelectrodes were placed ventrally in the bladder dome, upper bladder, lower bladder, and bladder base, along with the middle section of the exposed EUS. Intravesical P2X3-containing receptors were blocked with AF-323, a specific P2X3-P2X2/3 receptor antagonist. A digital electrophysiology amplifier was used to record electrical and cystometric signals throughout the LUT. Results Electrical activity in the LUT started before effective voiding contractions. Bladder pressure and electrical waveforms showed consistent out-of-phase activity when compared with the recordings made at the EUS. This pattern was also observed during voiding contractions in the presence of AF-353, supporting the hypothesis that during bladder distension, activation of P2X3-containing receptors is required for voiding contractions. Furthermore, the inhibition of P2X3-containing receptors significantly decreased the amplitude of electrical signals in the urinary bladder, but not the base or EUS. Conclusions Our results provide novel information about the regulation of the micturition process by P2X3-containing receptors located in the inner layers of the bladder.
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82
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Optogenetic silencing of nociceptive primary afferents reduces evoked and ongoing bladder pain. Sci Rep 2017; 7:15865. [PMID: 29158567 PMCID: PMC5696510 DOI: 10.1038/s41598-017-16129-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 11/03/2017] [Indexed: 12/30/2022] Open
Abstract
Patients with interstitial cystitis/bladder pain syndrome (IC/BPS) suffer from chronic pain that severely affects quality of life. Although the underlying pathophysiology is not well understood, inhibition of bladder sensory afferents temporarily relieves pain. Here, we explored the possibility that optogenetic inhibition of nociceptive sensory afferents could be used to modulate bladder pain. The light-activated inhibitory proton pump Archaerhodopsin (Arch) was expressed under control of the sensory neuron-specific sodium channel (sns) gene to selectively silence these neurons. Optically silencing nociceptive sensory afferents significantly blunted the evoked visceromotor response to bladder distension and led to small but significant changes in bladder function. To study of the role of nociceptive sensory afferents in freely behaving mice, we developed a fully implantable, flexible, wirelessly powered optoelectronic system for the long-term manipulation of bladder afferent expressed opsins. We found that optogenetic inhibition of nociceptive sensory afferents reduced both ongoing pain and evoked cutaneous hypersensitivity in the context of cystitis, but had no effect in uninjured, naïve mice. These results suggest that selective optogenetic silencing of nociceptive bladder afferents may represent a potential future therapeutic strategy for the treatment of bladder pain.
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83
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Schneider MP, Sartori AM, Tampé J, Moors S, Engmann AK, Ineichen BV, Hofer AS, Schwab ME, Kessler TM. Urodynamic measurements reflect physiological bladder function in rats. Neurourol Urodyn 2017; 37:1266-1271. [PMID: 29140562 DOI: 10.1002/nau.23455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/28/2017] [Indexed: 02/03/2023]
Abstract
AIMS Our objective was to investigate and compare bladder function in rats assessed by metabolic cage and by urodynamic measurements in fully awake animals. METHODS Bladder function of female Lewis rats was investigated in naïve animals by metabolic cage at baseline, 14-16 days after bladder catheter and external urethral sphincter electromyography electrode implantation in fully awake animals by urodynamics, and again by metabolic cage. RESULTS Investigating the same animals (n = 8), voided volume, average flow, and duration of voiding were similar (P > 0.05) in naïve animals measured by metabolic cage and after catheter implantation by urodynamic measurements and by metabolic cage. In naïve animals measured by metabolic cage, voided volumes were significantly different in the light (resting phase) versus the dark (active phase) part of the 24 h cycle (mean difference 0.14 mL, 21%, P = 0.004, n = 27). CONCLUSIONS Lower urinary tract function assessed by metabolic cage or by urodynamic meaurements in fully awake rats was indistinguishable. Thus, catheter implantation did not significantly change physiological bladder function. This shows that urodynamic measurements in awake animals are an appropriate approach to study lower urinary tract function in health and disease in animal models, directly paralleling the human diagnostic procedures.
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Affiliation(s)
- Marc P Schneider
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland.,Neuro-Urology, Spinal Cord Injury Center and Research, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.,Department of Urology, University of Bern, Bern, Switzerland
| | - Andrea M Sartori
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Juliane Tampé
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Selina Moors
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Anne K Engmann
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Benjamin V Ineichen
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Anna-Sophie Hofer
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Martin E Schwab
- Department of Health Sciences and Technology, Brain Research Institute, University of Zürich, ETH Zürich, Zürich, Switzerland
| | - Thomas M Kessler
- Neuro-Urology, Spinal Cord Injury Center and Research, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
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84
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Kitta T, Kanno Y, Chiba H, Higuchi M, Ouchi M, Togo M, Moriya K, Shinohara N. Benefits and limitations of animal models in partial bladder outlet obstruction for translational research. Int J Urol 2017; 25:36-44. [PMID: 28965358 DOI: 10.1111/iju.13471] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 08/28/2017] [Indexed: 11/26/2022]
Abstract
The functions of the lower urinary tract have been investigated for more than a century. Lower urinary tract symptoms, such as incomplete bladder emptying, weak urine stream, daytime urinary frequency, urgency, urge incontinence and nocturia after partial bladder outlet obstruction, is a frequent cause of benign prostatic hyperplasia in aging men. However, the pathophysiological mechanisms have not been fully elucidated. The use of animal models is absolutely imperative for understanding the pathophysiological processes involved in bladder dysfunction. Surgical induction has been used to study lower urinary tract functions of numerous animal species, such as pig, dog, rabbit, guinea pig, rat and mouse, of both sexes. Several morphological and functional modifications under partial bladder outlet obstruction have not only been observed in the bladder, but also in the central nervous system. Understanding the changes of the lower urinary tract functions induced by partial bladder outlet obstruction would also contribute to appropriate drug development for treating these pathophysiological conditions. In the present review, we discuss techniques for creating partial bladder outlet obstruction, the characteristics of several species, as well as issues of each model, and their translational value.
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Affiliation(s)
- Takeya Kitta
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yukiko Kanno
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Hiroki Chiba
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Madoka Higuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mifuka Ouchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mio Togo
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kimihiko Moriya
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Nobuo Shinohara
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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85
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Cao N, Ni J, Wang X, Tu H, Gu B, Si J, Wu G, Andersson KE. Chronic spinal cord injury causes upregulation of serotonin (5-HT) 2A and 5-HT 2C receptors in lumbosacral cord motoneurons. BJU Int 2017; 121:145-154. [PMID: 28710888 DOI: 10.1111/bju.13964] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
OBJECTIVES To investigate whether the voiding dysfunction caused by spinal cord injury (SCI) in rats can be improved by i.v. administration of the serotonin (5-HT)2A/2C receptor agonist 2,5-dimethoxy-4-iodophenyl-2-aminopropanehydrochloride (DOI), and to discuss whether the mechanism can be ascribed to 5-HT2A and 5-HT 2C receptor upregulation in lumbosacral cord motoneurons. MATERIALS AND METHODS Female Sprague-Dawley rats were divided into two groups (SCI group vs normal control [NC] group). Under urethane anaesthesia, cystometry was performed to examine the variation in urodynamic variables before and after successive intrathecal (i.t.) administration of various doses of DOI into the lumbosacral cord. Changes in 5-HT2A and -2C receptors in the lumbosacral cord were also investigated using immunohistochemical staining and Western blot analysis. RESULTS Compared with NC rats, the SCI rats had higher bladder capacity and post-void residual urine volume, and lower voiding efficiency. After SCI, DOI improved voiding efficiency, probably via external urethral sphincter (EUS) activity. Immunohistochemical staining and Western blot analysis showed that 5-HT2A and -2C receptors were upregulated in lumbosacral cord motoneurons. CONCLUSION In rats with SCI, DOI can improve voiding efficiency; this may be attributable to 5-HT2A and -2C receptor upregulation in lumbosacral cord motoneurons controlling EUS activity.
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Affiliation(s)
- Nailong Cao
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jianshu Ni
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiaohu Wang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Hongjian Tu
- Department of Urology, Third People's Hospital of Nanchang City, Nanchang, China
| | - Baojun Gu
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jiemin Si
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Gang Wu
- Department of Urology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Medical Center, Winston Salem, NC, USA
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86
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Characteristics of the mechanosensitive bladder afferent activities in relation with microcontractions in male rats with bladder outlet obstruction. Sci Rep 2017; 7:7646. [PMID: 28794457 PMCID: PMC5550413 DOI: 10.1038/s41598-017-07898-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 07/03/2017] [Indexed: 11/15/2022] Open
Abstract
We investigated the characteristics of bladder mechanosensitive single-unit afferent activities (SAAs) in rats with a bladder outlet obstruction (BOO) and their relationship with bladder microcontractions. Male Wistar rats were divided into Sham and BOO groups. Four or 10 days after the surgery, rats were anesthetized with urethane. The SAAs of Aδ- or C-fibers from the L6 dorsal roots were recorded during bladder filling. The BOO group showed a higher number of microcontractions and lower SAAs of Aδ-fibers compared with those of the Sham group. These findings were significant at day 10 post-operatively. In contrast, SAAs of C-fibers were not significantly different between the groups at either day 4 or 10. In the BOO group at day 10, the SAAs of both Aδ- and C-fibers at the “ascending” phase of microcontractions were significantly higher than those at the other phases (descending or stationary), and a similar tendency was also observed at day 4. Taken together, during bladder filling, the bladder mechanosensitive SAAs of Aδ-fibers were attenuated, but SAAs of both Aδ- and C-fibers were intermittently enhanced by propagation of microcontractions.
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87
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Kadekawa K, Majima T, Shimizu T, Wada N, de Groat WC, Kanai AJ, Goto M, Yoshiyama M, Sugaya K, Yoshimura N. The role of capsaicin-sensitive C-fiber afferent pathways in the control of micturition in spinal-intact and spinal cord-injured mice. Am J Physiol Renal Physiol 2017. [PMID: 28637786 DOI: 10.1152/ajprenal.00097.2017] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We examined bladder and urethral sphincter activity in mice with or without spinal cord injury (SCI) after C-fiber afferent desensitization induced by capsaicin pretreatment and changes in electrophysiological properties of mouse bladder afferent neurons 4 wk after SCI. Female C57BL/6N mice were divided into four groups: 1) spinal intact (SI)-control, 2) SI-capsaicin pretreatment (Cap), 3) SCI-control, and 4) SCI-Cap groups. Continuous cystometry and external urethral sphincter (EUS)-electromyogram (EMG) were conducted under an awake condition. In the Cap groups, capsaicin (25, 50, or 100 mg/kg) was injected subcutaneously 4 days before the experiments. In the SI-Cap group, 100 mg/kg capsaicin pretreatment significantly increased bladder capacity and decreased the silent period duration of EUS/EMG compared with the SI-control group. In the SCI-Cap group, 50 and 100 mg/kg capsaicin pretreatment decreased the number of nonvoiding contractions (NVCs) and the duration of reduced EUS activity during voiding, respectively, compared with the SCI-control group. In SCI mice, hexamethonium, a ganglionic blocker, almost completely blocked NVCs, suggesting that they are of neurogenic origin. Patch-clamp recordings in capsaicin-sensitive bladder afferent neurons from SCI mice showed hyperexcitability, which was evidenced by decreased spike thresholds and increased firing rate compared with SI mice. These results indicate that capsaicin-sensitive C-fiber afferent pathways, which become hyperexcitable after SCI, can modulate bladder and urethral sphincter activity in awake SI and SCI mice. Detrusor overactivity as shown by NVCs in SCI mice is significantly but partially dependent on capsaicin-sensitive C-fiber afferents, whereas the EUS relaxation during voiding is enhanced by capsaicin-sensitive C-fiber bladder afferents in SI and SCI mice.
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Affiliation(s)
- Katsumi Kadekawa
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,Southern Knights' Laboratory, Okinawa, Japan.,Okinawa Kyodo Hospital, Okinawa, Japan
| | - Tsuyoshi Majima
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,Department of Urology, Nagoya University Graduate School of Medicine, Nagoya, Japan; and
| | - Takahiro Shimizu
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Naoki Wada
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - William C de Groat
- Department of Pharmacology and Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Anthony J Kanai
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Momokazu Goto
- Department of Urology, Nagoya University Graduate School of Medicine, Nagoya, Japan; and
| | - Mitsuharu Yoshiyama
- Department of Pharmacology and Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,Department of Urology, University of Yamanashi Graduate School of Medical Science, Chuo, Japan
| | | | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; .,Department of Pharmacology and Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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88
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Zarifpour M, Andersson KE, Kelkar SS, Mohs A, Mendelsohn C, Schneider K, Marini F, Christ GJ. Characterization of a Murine Model of Bioequivalent Bladder Wound Healing and Repair Following Subtotal Cystectomy. Biores Open Access 2017; 6:35-45. [PMID: 28560089 PMCID: PMC5439456 DOI: 10.1089/biores.2017.0011] [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] [Indexed: 11/12/2022] Open
Abstract
Previous work demonstrated restoration of a bioequivalent bladder within 8 weeks of removing the majority of the bladder (subtotal cystectomy or STC) in rats. The goal of the present study was to extend our investigations of bladder repair to the murine model, to harness the power of mouse genetics to delineate the cellular and molecular mechanisms responsible for the observed robust bladder regrowth. Female C57 black mice underwent STC, and at 4, 8, and 12 weeks post-STC, bladder repair and function were assessed via cystometry, ex vivo pharmacologic organ bath studies, and T2-weighted magnetic resonance imaging (MRI). Histology was also performed to measure bladder wall thickness. We observed a time-dependent increase in bladder capacity (BC) following STC, such that 8 and 12 weeks post-STC, BC and micturition volumes were indistinguishable from those of age-matched non-STC controls and significantly higher than observed at 4 weeks. MRI studies confirmed that bladder volume was indistinguishable within 3 months (11 weeks) post-STC. Additionally, bladders emptied completely at all time points studied (i.e., no increases in residual volume), consistent with functional bladder repair. At 8 and 12 weeks post-STC, there were no significant differences in bladder wall thickness or in the different components (urothelium, lamina propria, or smooth muscle layers) of the bladder wall compared with age-matched control animals. The maximal contractile response to pharmacological activation and electrical field stimulation increased over time in isolated tissue strips from repaired bladders but remained lower at all time points compared with controls. We have established and validated a murine model for the study of de novo organ repair that will allow for further mechanistic studies of this phenomenon after, for example, genetic manipulation.
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Affiliation(s)
- Mona Zarifpour
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - Sneha S Kelkar
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - Aaron Mohs
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina.,Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska
| | - Cathy Mendelsohn
- Department of Urology, Pathology and Cell Biology, Genetics and Development, Columbia University, New York, New York
| | - Kerry Schneider
- Department of Urology, Pathology and Cell Biology, Genetics and Development, Columbia University, New York, New York
| | - Frank Marini
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - George J Christ
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina.,Department of Biomedical Engineering and Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia.,Laboratory of Regenerative Therapeutics, University of Virginia, Charlottesville, Virginia
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89
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Mann-Gow TK, Larson TR, Wøien CT, Andersen TM, Andersson KE, Zvara P. Evaluating the Procedure for Performing Awake Cystometry in a Mouse Model. J Vis Exp 2017. [PMID: 28570547 DOI: 10.3791/55588] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Awake filling cystometry has been used for a long time to evaluate bladder function in freely moving mice, however, the specific methods used, vary among laboratories. The goal of this study was to describe the microsurgical procedure used to implant an intravesical tube and the experimental technique for recording urinary bladder pressure in an awake, freely moving mouse. In addition, experimental data is presented to show how surgery, as well as tubing type and size, affect lower urinary tract function and recording sensitivity. The effect of tube diameter on pressure recording was assessed in both polyethylene and polyurethane tubing with different internal diameters. Subsequently, the best performing tube from both materials was surgically implanted into the dome of the urinary bladder of male C57BL/6 mice. Twelve-hour, overnight micturition frequency was recorded in healthy, intact animals and animals 2, 3, 5, and 7 days post-surgery. At harvest, bladders were assessed for signs of swelling using gross observation and were subsequently processed for pathological analysis. The greatest extent of bladder swelling was observed on day 2 and 3, which correlated with behavioral voiding data showing significantly impaired bladder function. By day 5, bladder histology and voiding frequency had normalized. Based on the literature and evidence provided by our studies, we propose the following steps for in vivo recording of intravesical pressure and voided volume in an awake mouse: 1) Perform the surgery using an operating microscope and microsurgical tools, 2) Use polyethylene-10 tubing to minimize movement artifacts, and 3) Perform cystometry on post-operative day 5, when bladder swelling resolves.
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Affiliation(s)
| | | | - Chrissie T Wøien
- Department of Urology and Biomedical Laboratory, University of Southern Denmark
| | - Thomas M Andersen
- Department of Urology and Biomedical Laboratory, University of Southern Denmark
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine, Wake Forest University; Institute for Clinical Medicine, Aarhus University
| | - Peter Zvara
- Department of Surgery, University of Vermont; Department of Urology and Biomedical Laboratory, University of Southern Denmark;
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90
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Toll-like receptor 7 is overexpressed in the bladder of Hunner-type interstitial cystitis, and its activation in the mouse bladder can induce cystitis and bladder pain. Pain 2017; 158:1538-1545. [DOI: 10.1097/j.pain.0000000000000947] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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91
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Munoz A. Neurogenic bladder dysfunction does not correlate with astrocyte and microglia activation produced by graded force in a contusion-induced spinal cord injury. Brain Res Bull 2017; 131:18-24. [DOI: 10.1016/j.brainresbull.2017.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 02/27/2017] [Indexed: 12/12/2022]
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92
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Liu Q, Long Z, Dong X, Zhang T, Zhao J, Sun B, Zhu J, Li J, Wang Q, Yang Z, Hu X, Li L. Cyclophosphamide-induced HCN1 channel upregulation in interstitial Cajal-like cells leads to bladder hyperactivity in mice. Exp Mol Med 2017; 49:e319. [PMID: 28428632 PMCID: PMC6130216 DOI: 10.1038/emm.2017.31] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 12/20/2022] Open
Abstract
Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are confirmed to be expressed in bladder interstitial Cajal-like cells (ICC-LCs), but little is known about their possible role in cystitis-associated bladder dysfunction. The present study aimed to determine the functional role of HCN channels in regulating bladder function under inflammatory conditions. Sixty female wild-type C57BL/6J mice and sixty female HCN1-knockout mice were randomly assigned to experimental and control groups, respectively. Cyclophosphamide (CYP)-induced cystitis models were successfully established in these mice. CYP treatment significantly enhanced HCN channel protein expression and Ih density and significantly altered bladder HCN1 channel regulatory proteins. Carbachol (CCH) and forskolin (FSK) exerted significant effects on bladder ICC-LC [Ca2+]i in CYP-treated wild-type (WT) mice, and HCN1 channel ablation significantly decreased the effects of CCH and FSK on bladder ICC-LC [Ca2+]i in both naive and CYP-treated mice. CYP treatment significantly potentiated the spontaneous contractions and CCH (0.001–10 μM)-induced phasic contractions of detrusor strips, and HCN1 channel deletion significantly abated such effects. Finally, we demonstrated that the development of CYP-induced bladder overactivity was reversed in HCN1−/− mice. Taken together, our results suggest that CYP-induced enhancements of HCN1 channel expression and function in bladder ICC-LCs are essential for cystitis-associated bladder hyperactivity development, indicating that the HCN1 channel may be a novel therapeutic target for managing bladder hyperactivity.
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Affiliation(s)
- Qian Liu
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Zhou Long
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Xingyou Dong
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Teng Zhang
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Jiang Zhao
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Bishao Sun
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Jingzhen Zhu
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Jia Li
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Qingqing Wang
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Zhenxing Yang
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Xiaoyan Hu
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
| | - Longkun Li
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing, China
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93
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Abstract
OBJECTIVES To investigate the effect of changing the bladder filling rate during cystometry in younger (2-3 months) and older (13-14 months) C57BL/6J male mice. METHODS Cystometry was performed on mice under anesthesia. Voiding cycles were established in each mouse at a pump delivery rate of 17 μl/min. After 30 min, the rate was increased sequentially to 25, 33, 41 and 49 μl/min. Each rate was maintained for 30 min. The following cystometric parameters were quantified: peak pressure amplitude, intercontractile interval (ICI), compliance, micturition pressure threshold and voiding efficiency. RESULTS Bladder weights were significantly greater in older mice (42 mg vs. 27 mg, P < 0.01), but functional capacities were not different. The pressure amplitudes did not change as filling rate increased, nor did they differ between the 4-month and 13-month-old males. ICIs were not significantly different between young and mature mice. However, both groups exhibited a non-linear reduction in ICI with increasing filling rate, best described by a power curve (R2 > 0.93). Compliance was higher in the older mice at low filling rates (17 and 25 μl/min) but this difference diminished at higher rates. Compliance decreased with increasing flow rate in a non-linear manner, again with greater effects at low filling rates. Micturition pressure thresholds increased with increasing flow rate in a linear manner and older mice began voiding at higher pressures than younger. Both young and old mice exhibited voiding efficiencies of ~70%. CONCLUSIONS The rate of volume delivery has complex effects on the timing of voiding and compliance. These findings argue for greater standardization of cystometry protocols and further investigation into afferent signaling to higher centers at different filling rates.
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Affiliation(s)
- Alexandra K Kim
- Laboratory of Voiding Dysfunction, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
| | - Warren G Hill
- Laboratory of Voiding Dysfunction, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
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94
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Xiang Z, Li Y, Bian T, He M, Xu Y, Wang G, Guo J, Wang H. An optimized transurethral catheterization cystometry in mice and comparison with classic suprapubic catheterization cystometry. Neurourol Urodyn 2017; 36:1965-1971. [PMID: 28169451 DOI: 10.1002/nau.23223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/09/2017] [Accepted: 01/10/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Zhuoyi Xiang
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Yaohui Li
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Tingchang Bian
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Minke He
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Yeqing Xu
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Guomin Wang
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Jianming Guo
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
| | - Hang Wang
- Department of Urology; Zhongshan Hospital, Fudan University; Shanghai China
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95
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Ito H, Pickering AE, Igawa Y, Kanai AJ, Fry CH, Drake MJ. Muro-Neuro-Urodynamics; a Review of the Functional Assessment of Mouse Lower Urinary Tract Function. Front Physiol 2017; 8:49. [PMID: 28220079 PMCID: PMC5292568 DOI: 10.3389/fphys.2017.00049] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/18/2017] [Indexed: 12/17/2022] Open
Abstract
Background: Mouse urodynamic tests are fundamental to understanding normal lower urinary tract (LUT) function. These experiments also contribute to our understanding of neurological dysfunction, pathophysiological processes, and potential mechanisms of therapy. Objectives: Systematic assessment of published evidence on urodynamics, advantages and limitations of different urodynamic measurements in mice, and consideration of potential implications for the clinical field. Methods: A search using specific search-terms for urodynamic studies and mice was conducted on PubMed (from inception to 1 July 2016). Results: We identified 55 studies examining or describing mouse neuro-urodynamics. We summarize reported features of mouse urodynamic function deriving from frequency-volume chart (FVC) measurements, voiding spot assays, filling cystometry, and pressure-flow studies. Similarly, an influence of the diurnal cycle on voiding is observed in mice and should be considered when interpreting rodent urodynamic studies, especially FVC measurements and voiding spot assays. Anaesthesia, restraint conditions, or filling rate influence mouse neuro-urodynamics. Mouse cystometric studies have observed intravesical pressure oscillations that accompany urine flow, attributed to high frequency opening and closing of the urethra. This characterization is not seen in other species, except rats. In contrast to human clinical urodynamics, the terminology of these examinations has not been standardized although many rodent urodynamic studies have been described. Conclusion: Mice have many anatomical and physiological similarities to humans and they are generally cost effective, and allow investigation of the effects of aging because of their short lifespan. There are some differences between mouse and human urodynamics. These must be considered when interpreting LUT function in mice, and translational value of murine disease models.
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Affiliation(s)
- Hiroki Ito
- Department of Physiology, Pharmacology and Neuroscience, University of Bristol Bristol, UK
| | - Anthony E Pickering
- Department of Physiology, Pharmacology and Neuroscience, University of Bristol Bristol, UK
| | - Yasuhiko Igawa
- Department of Continence Medicine, University of Tokyo Graduate School of Medicine Tokyo, Japan
| | - Anthony J Kanai
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Pennsylvania, PA, USA
| | - Christopher H Fry
- Department of Physiology, Pharmacology and Neuroscience, University of Bristol Bristol, UK
| | - Marcus J Drake
- Department of Physiology, Pharmacology and Neuroscience, University of Bristol Bristol, UK
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96
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Biardeau X, Przydacz M, Aharony S, Loutochin G, Campeau L, Kyheng M, Corcos J. Early Fesoterodine Fumarate Administration Prevents Neurogenic Detrusor Overactivity in a Spinal Cord Transected Rat Model. PLoS One 2017; 12:e0169694. [PMID: 28060912 PMCID: PMC5217950 DOI: 10.1371/journal.pone.0169694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 12/19/2016] [Indexed: 11/23/2022] Open
Abstract
Background In spinal cord injury, onset of detrusor overactivity (DO) is detrimental for quality of life (incontinence) and renal risk. Prevention has only been achieved with complex sophisticated electrical neuromodulation techniques. Purpose To assess the efficacy of early fesoterodine fumarate (FF) administration in preventing bladder overactivity in a spinal cord transected (SCT) rat model. Methods 33 Sprague-Dawley rats were allocated to 6 groups–Group 1: 3 normal controls; Group 2: 6 SCT controls; Group 3: 6 SCT rats + FF 0.18 mg/kg/d; Group 4: 6 SCT rats + FF 0.12 mg/kg/d; Group 5: 6 SCT rats + FF 0.18 mg/kg/d + 72-h wash-out period; Group 6: 6 SCT rats + FF 0.12 mg/kg/d + 72-h wash-out period. SCT was performed at T10. FF was continuously administered. Cystometry was undertaken 6 weeks after SCT in awake rats recording intermicturition pressure (IMP), baseline pressure, threshold pressure (Pthres) and maximum pressure (Pmax). Normal controls and SCT controls were initially compared using the Mann-Whitney U tests in order to confirm the SCT effect on cystometric parameters. The comparisons in cystometric and metabolic cage parameters between SCT controls and treated rats were done using post-hoc Dunn’s tests for Kruskal-Wallis analysis. Statistical testing was conducted at the two-tailed α-level of 0.05. Results Pressure parameters were significantly higher in SCT control group compared to normal controls. Six weeks after SCT, IMP was significantly lower in low dose treated group than in SCT controls. Pmax was significantly lower in 3 treated groups compared to SCT controls. Pthres was significantly lower in full time treated groups than in SCT controls. Conclusion Early administration of FF modulates bladder overactivity in a SCT rat model. Whereas short-term prevention has been demonstrated, the long-term should be further analyzed. Clinical application of these results should confirm this finding through randomized research protocols.
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Affiliation(s)
- Xavier Biardeau
- Department of Urology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Mikolaj Przydacz
- Department of Urology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Shachar Aharony
- Department of Urology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - George Loutochin
- Department of Urology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Lysanne Campeau
- Department of Urology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Maeva Kyheng
- Department of Biostatistics, EA2694, University of Lille, CHRU Lille, France
| | - Jacques Corcos
- Department of Urology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
- * E-mail:
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Preventive Effects of Long-Term Caloric Restriction on Aging Related In Vivo Bladder Dysfunction and Molecular Biological Changes in the Bladder and Dorsal Root Ganglia in Rats. J Urol 2016; 196:1575-1583. [DOI: 10.1016/j.juro.2016.05.104] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2016] [Indexed: 11/18/2022]
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98
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Lo TS, Lin YH, Chu HC, Cortes EFM, Pue LB, Tan YL, Uy-Patrimonio MC. Association of urodynamics and lower urogenital tract nerve growth factor after synthetic vaginal mesh implantation on a rat model. J Obstet Gynaecol Res 2016; 43:173-178. [PMID: 27762470 DOI: 10.1111/jog.13158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 08/07/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Tsia-Shu Lo
- Department of Obstetrics and Gynecology; Chang Gung Memorial Hospital, Keelung Medical Center; Keelung Taiwan Republic of China
- Division of Urogynecology, Department of Obstetrics and Gynecology; Linkou, Chang Gung Memorial Hospital, Linkou Medical Center; Taoyuan Taiwan Republic of China
- School of Medicine, Obstetrics and Gynecology; Chang Gung University; Taoyuan Taiwan Republic of China
| | - Yi-Hao Lin
- Division of Urogynecology, Department of Obstetrics and Gynecology; Linkou, Chang Gung Memorial Hospital, Linkou Medical Center; Taoyuan Taiwan Republic of China
- School of Medicine, Obstetrics and Gynecology; Chang Gung University; Taoyuan Taiwan Republic of China
| | - Hsiao-Chien Chu
- Division of Urogynecology, Department of Obstetrics and Gynecology; Linkou, Chang Gung Memorial Hospital, Linkou Medical Center; Taoyuan Taiwan Republic of China
| | - Eileen Feliz M. Cortes
- Division of Urogynecology, Department of Obstetrics and Gynecology; Linkou, Chang Gung Memorial Hospital, Linkou Medical Center; Taoyuan Taiwan Republic of China
- Department of Obstetrics and Gynecology; De La Salle University Medical Center; Dasmariñas Cavite Philippines
| | - Leng Boi Pue
- Department of Obstetrics and Gynecology; Kuala Lumpur Hospital; Kuala Lumpur Malaysia
| | - Yiap Loong Tan
- Department of Obstetrics and Gynecology; Kuching Specialist Hospital; Sarawak Malaysia
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99
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IGF-1-containing multi-layered collagen-fibrin hybrid scaffolds for bladder tissue engineering. Acta Biomater 2016; 41:75-85. [PMID: 27286676 DOI: 10.1016/j.actbio.2016.06.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/25/2016] [Accepted: 06/07/2016] [Indexed: 02/03/2023]
Abstract
UNLABELLED Clinical success of bladder reconstructive procedures could be promoted by the availability of functional biomaterials. In this study, we have developed a multi-layered scaffold consisting of a bioactive fibrin layer laminated between two collagen sheets all having undergone plastic compression. With this construct we performed bladder augmentation in a nude rat model after partial bladder excision and evaluated the morphological and functional behavior of the implant. The fibrin was functionalized with a recombinant human insulin-like growth factor-1 (IGF-1) variant that covalently binds fibrin during polymerization and has a matrix metalloproteinase-cleavage insert to enable cell-mediated release. The purified IGF-1 variant showed similar bioactivity in vitro compared to commercially available wild type (wt) IGF-1, inducing receptor phosphorylation and induction of human smooth muscle cell proliferation. In vivo, the multi-layered bioactive collagen-fibrin scaffolds loaded with the IGF-1 variant triggered dose-dependent functional host smooth muscle cell invasion and bundle formation with re-urothelialization 4weeks after surgery in a rat model. STATEMENT OF SIGNIFICANCE The design of new bio-functional scaffolds that can be employed for bladder reconstructive procedures is a growing focus in the field of tissue engineering. In this study, a fibrin binding form of human insulin-like growth factor-1 (IGF-1) was produced and used to functionalize a multi-layered collagen-fibrin scaffold consisting of bioactive fibrin layer, sandwiched between two collagen gels. An effective dosage of our IGF-1 variant was successfully determined via a nude rat bladder model, which may play a critical role in estimating its therapeutic dosage in clinical trials. Thus, this new bioactive scaffold may offer an advanced approach to accelerate bladder regeneration.
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100
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Drake MJ, Kanai A, Bijos DA, Ikeda Y, Zabbarova I, Vahabi B, Fry CH. The potential role of unregulated autonomous bladder micromotions in urinary storage and voiding dysfunction; overactive bladder and detrusor underactivity. BJU Int 2016; 119:22-29. [PMID: 27444952 DOI: 10.1111/bju.13598] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The isolated bladder shows autonomous micromotions, which increase with bladder distension, generate sensory nerve activity, and are altered in models of urinary dysfunction. Intravesical pressure resulting from autonomous activity putatively reflects three key variables; the extent of micromotion initiation, distances over which micromotions propagate, and overall bladder tone. In vivo, these variables are subordinate to the efferent drive of the central nervous system. In the micturition cycle storage phase, efferent inhibition keeps autonomous activity generally at a low level, where it may signal 'state of fullness', whilst maintaining compliance. In the voiding phase, mass efferent excitation elicits generalised contraction (global motility initiation). In lower urinary tract dysfunction, efferent control of the bladder can be impaired, for example due to peripheral 'patchy' denervation. In this case, loss of efferent inhibition may enable unregulated micromotility, and afferent stimulation, predisposing to urinary urgency. If denervation is relatively slight, the detrimental impact on voiding may be low, as the adjacent innervated areas may be able to initiate micromotility synchronous with the efferent nerve drive, so that even denervated areas can contribute to the voiding contraction. This would become increasingly inefficient the more severe the denervation, such that ability of triggered micromotility to propagate sufficiently to engage the denervated areas in voiding declines, so the voiding contraction increasingly develops the characteristics of underactivity. In summary, reduced peripheral coverage by the dual efferent innervation (inhibitory and excitatory) impairs regulation of micromotility initiation and propagation, potentially allowing emergence of overactive bladder and, with progression, detrusor underactivity.
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Affiliation(s)
- Marcus J Drake
- School of Clinical Sciences, Pharmacology and Neuroscience, University of Bristol, Bristol, UK.,Bristol Urological Institute, Southmead Hospital, University of West of England, Bristol, UK
| | | | - Dominika A Bijos
- Bristol Urological Institute, Southmead Hospital, University of West of England, Bristol, UK
| | - Youko Ikeda
- University of Pittsburgh, Pittsburgh, PA, USA
| | | | - Bahareh Vahabi
- Bristol Urological Institute, Southmead Hospital, University of West of England, Bristol, UK.,School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, UK
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