1
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Oliveira AL, Medeiros ML, Gomes EDT, Mello GC, Costa SKP, Mónica FZ, Antunes E. TRPA1 channel mediates methylglyoxal-induced mouse bladder dysfunction. Front Physiol 2023; 14:1308077. [PMID: 38143915 PMCID: PMC10739337 DOI: 10.3389/fphys.2023.1308077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 11/27/2023] [Indexed: 12/26/2023] Open
Abstract
Introduction: The transient receptor potential ankyrin 1 channel (TRPA1) is expressed in urothelial cells and bladder nerve endings. Hyperglycemia in diabetic individuals induces accumulation of the highly reactive dicarbonyl compound methylglyoxal (MGO), which modulates TRPA1 activity. Long-term oral intake of MGO causes mouse bladder dysfunction. We hypothesized that TRPA1 takes part in the machinery that leads to MGO-induced bladder dysfunction. Therefore, we evaluated TRPA1 expression in the bladder and the effects of 1 h-intravesical infusion of the selective TRPA1 blocker HC-030031 (1 nmol/min) on MGO-induced cystometric alterations. Methods: Five-week-old female C57BL/6 mice received 0.5% MGO in their drinking water for 12 weeks, whereas control mice received tap water alone. Results: Compared to the control group, the protein levels and immunostaining for the MGO-derived hydroimidazolone isomer MG-H1 was increased in bladders of the MGO group, as observed in urothelium and detrusor smooth muscle. TRPA1 protein expression was significantly higher in bladder tissues of MGO compared to control group with TRPA1 immunostaining both lamina propria and urothelium, but not the detrusor smooth muscle. Void spot assays in conscious mice revealed an overactive bladder phenotype in MGO-treated mice characterized by increased number of voids and reduced volume per void. Filling cystometry in anaesthetized animals revealed an increased voiding frequency, reduced bladder capacity, and reduced voided volume in MGO compared to vehicle group, which were all reversed by HC-030031 infusion. Conclusion: TRPA1 activation is implicated in MGO-induced mouse overactive bladder. TRPA1 blockers may be useful to treat diabetic bladder dysfunction in individuals with high MGO levels.
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Affiliation(s)
- Akila L. Oliveira
- Department of Pharmacology, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Matheus L. Medeiros
- Department of Pharmacology, University of Campinas (UNICAMP), São Paulo, Brazil
| | | | | | - Soraia Katia Pereira Costa
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, Brazil
| | - Fabíola Z. Mónica
- Department of Pharmacology, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Edson Antunes
- Department of Pharmacology, University of Campinas (UNICAMP), São Paulo, Brazil
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2
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Xuan Z, Gurevich L, Christiansen JDC, Zachar V, Pennisi CP. Stable hydrogel adhesion to polydimethylsiloxane enables cyclic mechanical stimulation of 3D-bioprinted smooth muscle constructs. Biotechnol Bioeng 2023; 120:3396-3408. [PMID: 37526327 DOI: 10.1002/bit.28516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/05/2023] [Accepted: 07/11/2023] [Indexed: 08/02/2023]
Abstract
During normal urination, smooth muscle cells (SMCs) in the lower urinary tract (LUT) are exposed to mechanical signals that have a critical impact on tissue structure and function. Nevertheless, the mechanisms underlying the maintenance of the contractile phenotype of SMCs remain poorly understood. This is due, in part, to a lack of studies that have examined the effects of mechanical loading using three-dimensional (3D) models. In this study, surface modifications of polydimethylsiloxane (PDMS) membrane were evaluated to investigate the effects of cyclic mechanical stimulation on SMC maturation in 3D constructs. Commercially available cell stretching plates were modified with amino or methacrylate groups to promote adhesion of 3D constructs fabricated by bioprinting. After 6 days of stimulation, the effects of mechanical stimulation on the expression of contractile markers at the mRNA and protein levels were analyzed. Methacrylate-modified surfaces supported stable adhesion of the 3D constructs to the membrane and facilitated cyclic mechanical stimulation, which significantly increased the expression of contractile markers at the mRNA and protein levels. These effects were found to be mediated by activation of the p38 MAPK pathway, as inhibition of this pathway abolished the effects of stimulation in a dose-dependent manner. These results provide valuable insights into the role of mechanical signaling in maintaining the contractile phenotype of bladder SMCs, which has important implications for the development of future treatments for LUT diseases.
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Affiliation(s)
- Zongzhe Xuan
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Leonid Gurevich
- Department of Materials and Production, Aalborg University, Aalborg, Denmark
| | | | - Vladimir Zachar
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Cristian Pablo Pennisi
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
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3
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Cheng Q, Zhang L, Zhang J, Zhou X, Wu B, Wang D, Wei T, Shafiq M, Li S, Zhi D, Guan Y, Wang K, Kong D. Decellularized Scaffolds with Double-Layer Aligned Microchannels Induce the Oriented Growth of Bladder Smooth Muscle Cells: Toward Urethral and Ureteral Reconstruction. Adv Healthc Mater 2023; 12:e2300544. [PMID: 37638600 DOI: 10.1002/adhm.202300544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 06/27/2023] [Indexed: 08/29/2023]
Abstract
There is a great clinical need for regenerating urinary tissue. Native urethras and ureters have bidirectional aligned smooth muscle cells (SMCs) layers, which plays a pivotal role in micturition and transporting urine and inhibiting reflux. Thus far, urinary scaffolds have not been designed to induce the native-mimicking aligned arrangement of SMCs. In this study, a tubular decellularized extracellular matrix (dECM) with an intact internal layer and bidirectional aligned microchannels in the tubular wall, which is realized by the subcutaneous implantation of a template, followed by the removal of the template, and decellularization, is engineered. The dense and intact internal layer effectively increases the leakage pressure of the tubular dECM scaffolds. Rat-derived dECM scaffolds with three different sizes of microchannels are fabricated by tailoring the fiber diameter of the templates. The rat-derived dECM scaffolds exhibiting microchannels of ≈65 µm show suitable mechanical properties, good ability to induce the bidirectional alignment and growth of human bladder SMCs, and elevated higher functional protein expression in vitro. These data indicate that rat-derived tubular dECM scaffolds manifesting double-layer aligned microchannels may be promising candidates to induce the native-mimicking regeneration of SMCs in urethra and ureter reconstruction.
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Affiliation(s)
- Quhan Cheng
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Linli Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Jingai Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xin Zhou
- Department of Medical Imaging, Shanxi Medical University, Taiyuan, 030001, China
| | - Boyu Wu
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Dezheng Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Tingting Wei
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Muhammad Shafiq
- Department of Chemical Engineering, Faculty of Engineering, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Shengbin Li
- Department of Urology, Tianjin Children's Hospital/Tianjin University Children's Hospital, Tianjin, 300134, China
| | - Dengke Zhi
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Yong Guan
- Department of Urology, Tianjin Children's Hospital/Tianjin University Children's Hospital, Tianjin, 300134, China
| | - Kai Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Deling Kong
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
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Dalkir FT, Aydinoglu F, Ogulener N. The role of rhoA/rho-kinase and PKC in the inhibitory effect of L-cysteine/H 2S pathway on the carbachol-mediated contraction of mouse bladder smooth muscle. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:2023-2038. [PMID: 36894621 DOI: 10.1007/s00210-023-02440-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 02/20/2023] [Indexed: 03/11/2023]
Abstract
We investigated the role of RhoA/Rho-kinase (ROCK) and PKC in the inhibitory effect of L-cysteine/hydrogen sulfide (H2S) pathway on the carbachol-mediated contraction of mouse bladder smooth muscle. Carbachol (10-8-10-4 M) induced a concentration-dependent contraction in bladder tissues. L-cysteine (H2S precursor; 10-2 M) and exogenous H2S (NaHS; 10-3 M) reduced the contractions evoked by carbachol by ~ 49 and ~ 53%, respectively, relative to control. The inhibitory effect of L-cysteine on contractions to carbachol was reversed by 10-2 M PAG (~ 40%) and 10-3 M AOAA (~ 55%), cystathionine-gamma-lyase (CSE) and cystathionine-β-synthase (CBS) inhibitor, respectively. Y-27632 (10-6 M) and GF 109203X (10-6 M), a specific ROCK and PKC inhibitor, respectively, reduced contractions evoked by carbachol (~ 18 and ~ 24% respectively), and the inhibitory effect of Y-27632 and GF 109203X on contractions was reversed by PAG (~ 29 and ~ 19%, respectively) but not by AOAA. Also, Y-27632 and GF 109203X reduced the inhibitory responses of L-cysteine on the carbachol-induced contractions (~ 38 and ~ 52% respectively), and PAG abolished the inhibitory effect of L-cysteine on the contractions in the presence of Y-27632 (~ 38%). Also, the protein expressions of CSE, CBS, and 3-MST enzymes responsible for endogenous H2S synthesis were detected by Western blot method. H2S level was increased by L-cysteine, Y-27632, and GF 109203X (from 0.12 ± 0.02 to 0.47 ± 0.13, 0.26 ± 0.03, and 0.23 ± 0.06 nmol/mg respectively), and this augmentation in H2S level decreased with PAG (0.17 ± 0.02, 0.15 ± 0.03, and 0.07 ± 0.04 nmol/mg respectively). Furthermore, L-cysteine and NaHS reduced carbachol-induced ROCK-1, pMYPT1, and pMLC20 levels. Inhibitory effects of L-cysteine on ROCK-1, pMYPT1, and pMLC20 levels, but not of NaHS, were reversed by PAG. These results suggest that there is an interaction between L-cysteine/H2S and RhoA/ROCK pathway via inhibition of ROCK-1, pMYPT1, and pMLC20, and the inhibition of RhoA/ROCK and/or PKC signal pathway may be mediated by the CSE-generated H2S in mouse bladder.
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Affiliation(s)
- Fatma Tugce Dalkir
- Department of Pharmacology, Medical Faculty, Cukurova University, Adana, Turkey
| | - Fatma Aydinoglu
- Department of Pharmacology, Pharmacy Faculty, Cukurova University, Adana, Turkey
| | - Nuran Ogulener
- Department of Pharmacology, Medical Faculty, Cukurova University, Adana, Turkey.
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5
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Prata F, Lucarini G, Menciassi A, Ricotti L, Mazzocchi T, Marziale L, Gruppioni E, Scarpa RM, Papalia R. A magnetic endourethral sphincter against stress urinary incontinence: preliminary pilot study in humans. Minerva Urol Nephrol 2023; 75:514-520. [PMID: 37166131 DOI: 10.23736/s2724-6051.23.05190-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
BACKGROUND Urinary incontinence (UI) is a common and frustrating condition that affects patients' quality of life as well as the Healthcare systems. Currently, the most severe cases of UI are treated using implanted, invasive artificial sphincters. We propose an innovative, minimally invasive magnetic endourethral sphincter for the treatment of stress UI (SUI) in patients for whom previous medical and surgical treatments have failed. METHODS Six patients with severe SUI were enrolled at a single center and underwent cystoscopic sphincter implantation. After 10 days, correct device position was confirmed by ultrasonography. The sphincter was explanted after 28 days. RESULTS In all patients, the sphincter was successfully implanted using an endoscopic approach. One patient reached the end of the pilot test (28 days) with the sphincter correctly placed. Patients' responses on the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form questionnaire improved from a score of 18 out of 21 at the screening visit (UI without reasons) to a score of 3 out of 21 (almost perfect continence). No major pain and discomfort were reported. CONCLUSIONS This study showed the feasibility of sphincter implantation, explantation, and overall tolerability, although a redesign of the sphincter distal part is needed.
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Affiliation(s)
- Francesco Prata
- Department of Urology, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Gioia Lucarini
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy -
| | | | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
| | | | | | | | - Roberto M Scarpa
- Department of Urology, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Rocco Papalia
- Department of Urology, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
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6
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Hennenberg M, Michel MC. Adrenoceptors in the Lower Urinary Tract. Handb Exp Pharmacol 2023. [PMID: 37455288 DOI: 10.1007/164_2023_678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Adrenoceptors importantly contribute to the physiological regulation of lower urinary tract (LUT) function and have become a target of several clinically successful treatments for major LUT diseases. In the bladder dome, β-adrenoceptor subtypes are found in multiple cell types and mediate relaxation of detrusor smooth muscle, perhaps partly indirectly by acting on afferent nerves and cells of the mucosa. β3-adrenoceptor agonists such as mirabegron and vibegron are used to treat overactive bladder syndrome. In the bladder trigone and urethra, α1-adrenoceptors cause contraction and thereby physiologically contribute to bladder outlet resistance. α1-adrenoceptors in the prostate also cause contraction and pathophysiologically elevate bladder outlet resistance leading to voiding dysfunction in benign prostatic hyperplasia. α1-adrenoceptor antagonist such as tamsulosin is widely used as a first-line option to treat LUT symptoms in men, but it remains unclear to which extent and how smooth muscle relaxation contributes to symptom relief.
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Affiliation(s)
- Martin Hennenberg
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Martin C Michel
- Department of Pharmacology, University Medical Center, Johannes Gutenberg University, Mainz, Germany.
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7
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Engin S, Barut EN, Erac Y, Sari S, Kadioglu M. The inhibitory effect of escitalopram on mouse detrusor contractility: The role of L-type calcium channels. Toxicol Appl Pharmacol 2023; 461:116408. [PMID: 36736438 DOI: 10.1016/j.taap.2023.116408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 12/27/2022] [Accepted: 01/28/2023] [Indexed: 02/05/2023]
Abstract
Selective serotonin reuptake inhibitors (SSRIs) are associated with urinary problems attributed to their central effects. ESC is a preferred SSRI and several case reports described that ESC is related to urinary retention. However, the direct effect of ESC on detrusor contractility is still not completely elucidated. Thus, we investigated the effect of ESC on detrusor contractility and mechanism(s) of its action in isolated mouse detrusor strips. Molecular docking and measurement of intracellular calcium were performed to determine the possible calcium channel blocking effect of ESC. The contractile responses to carbachol (CCh), KCl and electrical field stimulation of detrusor strips were significantly abolished by ESC (10 or 100 μM). ESC relaxed KCl-precontracted detrusor strips concentration-dependently, which was not affected by tetraethylammonium, glibenclamide, 4-aminopyridine, propranolol, L-NAME or methylene blue. ESC (10 or 100 μM) reduced both the CaCl2- and CCh-induced contractions under calcium-free conditions, indicating the role of calcium-involved mechanisms in ESC-mediated relaxation. Furthermore, ESC significantly decreased Bay K8644-induced contraction and the cytosolic calcium level in fura-2-loaded A7r5 cells. Molecular docking study also revealed the potential of ESC to bind L-type calcium (Cav1) channels. Our results demonstrate that ESC inhibits detrusor contractility via blocking Cav1 channels, which provides evidence for the direct effect of ESC on detrusor contractility and its mechanism.
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Affiliation(s)
- Seçkin Engin
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Türkiye.
| | - Elif Nur Barut
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Türkiye
| | - Yasemin Erac
- Department of Pharmacology, Faculty of Pharmacy, Ege University, İzmir, Türkiye
| | - Suat Sari
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Hacettepe University, Ankara, Türkiye
| | - Mine Kadioglu
- Department of Medical Pharmacology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Türkiye
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8
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Li W, Lin Y, Xie H, Fu Q, Chen R, Hu X, Huang J, Wang J, Yang R. Efficacy and safety of mirabegron in the treatment of overactive bladder syndrome after radical prostatectomy: a prospective randomized controlled study. Front Oncol 2023; 13:1188619. [PMID: 37205190 PMCID: PMC10185830 DOI: 10.3389/fonc.2023.1188619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 04/12/2023] [Indexed: 05/21/2023] Open
Abstract
Objectives To evaluate the effects of mirabegron in the treatment of overactive bladder syndrome (OAB) after radical prostatectomy (RP). Patients and methods A total of 108 post-operative RP patients were randomly assigned to either the mirabegron (study) or the placebo (control) group. The Overactive Bladder Syndrome Self-Assessment Scale (OABSS) was selected as the primary endpoint, and the International Prostate Symptom Score (IPSS) and Quality of Life (QOL) score were selected as secondary endpoints. Statistical analysis was performed using IBM SPSS Statistics 26, and the treatment effects were compared between the two groups using independent samples t-test. Results In total, 55 patients were included in the study group and 53 patients in the control group. The mean age was(70.08 ± 7.54)years. There was no statistical difference in the baseline data between the two groups. OABSS scores decreased significantly in the study group compared to the control group during drug treatment (6.67 ± 1.06 vs. 9.14 ± 1.83, p < 0.01) and were better than the control group during the follow-up at week 8 and week 12. In addition, the decrease in IPSS scores (11.29 ± 3.89 and 15.34 ± 3.54, p<0.01) and the increase in QOL scores (2.40 ± 0.81 vs. 3.20 ± 1.00) were statistically significant in the study group. And the patients in the study group had better improvement in voiding symptoms and quality of life than the control group during the follow-up period. Conclusion Daily administration of 50 mg mirabegron after RP surgery significantly improved the symptoms of OAB after surgery with fewer side effects. Additional randomized controlled trials should be conducted in the future to further evaluate the efficacy and safety of mirabegron.
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Affiliation(s)
- Wang Li
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yanduo Lin
- Department of Urology, Hainan Hospital, General Hospital of the Chinese People's Liberation Army, Hainan, China
| | - Hong Xie
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiang Fu
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rong Chen
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyong Hu
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jianwen Huang
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jihong Wang
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ranxing Yang
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Ranxing Yang,
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9
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Tan Q, Le H, Tang C, Zhang M, Yang W, Hong Y, Wang X. Tailor-made natural and synthetic grafts for precise urethral reconstruction. J Nanobiotechnology 2022; 20:392. [PMID: 36045428 PMCID: PMC9429763 DOI: 10.1186/s12951-022-01599-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 08/13/2022] [Indexed: 11/10/2022] Open
Abstract
Injuries to the urethra can be caused by malformations, trauma, inflammation, or carcinoma, and reconstruction of the injured urethra is still a significant challenge in clinical urology. Implanting grafts for urethroplasty and end-to-end anastomosis are typical clinical interventions for urethral injury. However, complications and high recurrence rates remain unsatisfactory. To address this, urethral tissue engineering provides a promising modality for urethral repair. Additionally, developing tailor-made biomimetic natural and synthetic grafts is of great significance for urethral reconstruction. In this work, tailor-made biomimetic natural and synthetic grafts are divided into scaffold-free and scaffolded grafts according to their structures, and the influence of different graft structures on urethral reconstruction is discussed. In addition, future development and potential clinical application strategies of future urethral reconstruction grafts are predicted.
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Affiliation(s)
- Qinyuan Tan
- Department of Urology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun, 130061, People's Republic Of China
| | - Hanxiang Le
- Department of Orthopedics, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun, 130041, People's Republic Of China
| | - Chao Tang
- Department of Urology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun, 130061, People's Republic Of China
| | - Ming Zhang
- Department of Urology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun, 130061, People's Republic Of China
| | - Weijie Yang
- Department of Urology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun, 130061, People's Republic Of China
| | - Yazhao Hong
- Department of Pediatric Surgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Street, Nanjing, 210029, People's Republic Of China.
| | - Xiaoqing Wang
- Department of Urology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun, 130061, People's Republic Of China.
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10
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Li XM, Zhang LM, Li Y, Zhu QY, Zhao C, Fang SB, Yang ZL. Usefulness of transperineal shear wave elastography of levator ani muscle in women with stress urinary incontinence. Abdom Radiol (NY) 2022; 47:1873-1880. [PMID: 35290481 DOI: 10.1007/s00261-022-03478-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/26/2022] [Accepted: 02/26/2022] [Indexed: 11/29/2022]
Abstract
This study aimed to quantitatively assess the quality of levator ani muscle (LAM) using shear wave elastography (SWE) and to evaluate the association between the elasticity of LAM and stress urinary incontinence (SUI). The study population included 32 women with SUI and 34 women with normal pelvic support. The thickness of LAM, bladder neck descent (BND), and urethral funneling (UF) were assessed by transperineal ultrasound. LAM elasticity was measured by SWE at rest and during the maximal Valsalva maneuver. Age, menopause, BND, and UF showed a positive correlation with SUI. There was no significant between-group difference in the elastic modulus values of LAM at rest. The thickness of LAM in women with SUI was greater than that in control group at rest and during the maximal Valsalva maneuver (P < 0.001). The elastic modulus values of Emax and Emean were significantly increased from rest to the maximal Valsalva maneuver in all participants (56.24 vs 82.43 kPa and 47.92 vs 72.37 kPa, P < 0.001). The change of these variables from rest to the maximal Valsalva maneuver in the control group was more obvious than that in the SUI group (34.09 vs 17.87 kPa and 31.55 vs 16.82 kPa, P < 0.05). The elasticity of LAM, as quantified by SWE, may potentially be used as an index for predicting SUI.
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Affiliation(s)
- X M Li
- Department of Ultrasound, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - L M Zhang
- Department of Ultrasound, Maternity and Child Health Care of Zaozhuang, Jining, 261031, China
| | - Y Li
- Department of Gynecology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Q Y Zhu
- Department of Ultrasound, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - C Zhao
- Department of Ultrasound, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - S B Fang
- Department of Ultrasound, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Z L Yang
- Department of Ultrasound, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China.
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11
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Jones BM, Mingin GC, Tykocki NR. Histamine receptors rapidly desensitize without altering nerve-evoked contractions in murine urinary bladder smooth muscle. Am J Physiol Renal Physiol 2022; 322:F268-F279. [PMID: 35073211 PMCID: PMC8858670 DOI: 10.1152/ajprenal.00355.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 01/05/2022] [Accepted: 01/17/2022] [Indexed: 11/22/2022] Open
Abstract
Histamine has been implicated in urinary bladder dysfunction as an inflammatory mediator driving sensory nerve hypersensitivity. However, the direct influence of histamine on smooth muscle has not been thoroughly investigated. We hypothesized that histamine directly contracts urinary bladder smooth muscle (UBSM) independent of effects on nerves. Single cell quantitative RT-PCR determined that only histamine H1 and H2 receptors were expressed on UBSM cells. In isolated tissue bath experiments, histamine (200 µM) caused a highly variable and rapidly desensitizing contraction that was completely abolished by the H1 receptor antagonist fexofenadine (5 µM) and the Gq/11 inhibitor YM254890 (1 µM). Neither the muscarinic receptor antagonist atropine (1 µM), the Na+ channel blocker tetrodotoxin (1 µM), nor the transient receptor potential vanilloid type 1 antagonist capsazepine (10 µM) altered responses to histamine, suggesting that nerve activation was not involved. UBSM desensitization to histamine was not due to receptor internalization, as neither the cholesterol-depleting agent methyl-β-cyclodextrin (10 mM), the dynamin-mediated endocytosis inhibitor dynasore (100 µM), nor the clathrin-mediated endocytosis inhibitor pitstop2 (15 µM) augmented or prolonged histamine contractions. Buffer from desensitized tissues still contracted histamine-naïve tissues, revealing that histamine was not metabolized. Prolonged exposure to histamine also had no effect on contractions due to electrical field stimulation, suggesting that both efferent nerve and UBSM excitability were unchanged. Together, these data suggest that histamine, although able to transiently contract UBSM, does not have a lasting effect on UBSM excitability or responses to efferent nerve input. Thus, any acute effects of histamine directly on UBSM contractility are unlikely to alter urinary bladder function.NEW & NOTEWORTHY Histamine is commonly associated with inflammatory bladder pathologies. We sought to investigate the role of histamine on urinary bladder contractility. Histamine contracts the bladder, but this response is highly variable and desensitizes completely in minutes. This desensitization is not due to internalization of the receptor or metabolism of histamine. Because nerve-evoked contractions are also not increased in the presence of histamine, our findings suggest that histamine is not directly acting to change contractility.
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Affiliation(s)
- B Malique Jones
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
- Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Gerald C Mingin
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
- Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Nathan R Tykocki
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
- Larner College of Medicine, University of Vermont, Burlington, Vermont
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12
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Wang X, Shi C, Hou X, Song S, Li C, Cao W, Chen W, Li L. Application of biomaterials and tissue engineering in bladder regeneration. J Biomater Appl 2022; 36:1484-1502. [DOI: 10.1177/08853282211048574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The primary functions of the bladder are storing urine under low and stable pressure and micturition. Various forms of trauma, tumors, and iatrogenic injuries can cause the loss of or reduce bladder function or capacity. If such damage is not treated in time, it will eventually lead to kidney damage and can even be life-threatening in severe cases. The emergence of tissue engineering technology has led to the development of more possibilities for bladder repair and reconstruction, in which the selection of scaffolds is crucial. In recent years, a growing number of tissue-engineered bladder scaffolds have been constructed. Therefore, this paper will discuss the development of tissue-engineered bladder scaffolds and will further analyze the limitations of and challenges encountered in bladder reconstruction.
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Affiliation(s)
- Xiaoya Wang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Chunying Shi
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Xianglin Hou
- Institute of genetics and developmental biology, Chinese Academy of Sciences, Beijing, China
| | - Siqi Song
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Chenglin Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Wenxuan Cao
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Wei Chen
- Department of Urology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Ling Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
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13
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Metformin abrogates the voiding dysfunction induced by prolonged methylglyoxal intake. Eur J Pharmacol 2021; 910:174502. [PMID: 34516950 DOI: 10.1016/j.ejphar.2021.174502] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 08/14/2021] [Accepted: 09/09/2021] [Indexed: 12/17/2022]
Abstract
Methylglyoxal (MGO) is a reactive carbonyl species found at high levels in blood of diabetic patients. The anti-hyperglycemic drug metformin can scavenger MGO and reduce the formation of advanced glycation end products (AGEs). Here, we aimed to investigate if MGO-induced bladder dysfunction can be reversed by metformin. Male C57/BL6 mice received 0.5% MGO in drinking water for 12 weeks, and metformin (300 mg/kg, daily gavage) was given in the last two weeks. The bladder functions were evaluated by performing voiding behavior assays, cystometry and in vitro bladder contractions. MGO intake markedly elevated the levels of MGO and fluorescent AGEs in serum and reduced the mRNA expression and activity of glyoxalase (Glo1) in bladder tissues. Glucose levels were unaffected among groups. MGO intake also increased the urothelium thickness and collagen content of the bladder. Void spot assays in conscious mice revealed an increased void volume in MGO group. The cystometric assays in anesthetized mice revealed increases of basal pressure, non-voiding contractions frequency, bladder capacity, inter-micturition pressure and residual volume, which were accompanied by reduced voiding efficiency in MGO group. In vitro bladder contractions to carbachol, α,β-methylene ATP and electrical-field stimulation were significantly greater in MGO group. Metformin normalized the changes of MGO and AGEs levels, Glo1 expression and activity, urothelium thickness and collagen content. The MGO-induced voiding dysfunction were all restored by metformin treatment. Our findings strongly suggest that the amelioration of MGO-induced voiding dysfunction by metformin relies on its ability to scavenger MGO, preventing its accumulation in blood.
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14
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López-Cortés R, Vázquez-Estévez S, Fernández JÁ, Núñez C. Proteomics as a Complementary Technique to Characterize Bladder Cancer. Cancers (Basel) 2021; 13:cancers13215537. [PMID: 34771699 PMCID: PMC8582709 DOI: 10.3390/cancers13215537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 10/21/2021] [Accepted: 10/21/2021] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Although immunohistochemistry is a routine technique in clinics, and genomics has been rapidly incorporated, proteomics is a step behind. This general situation is also the norm in bladder cancer research. This review shows the contributions of proteomics to the molecular classification of bladder cancer, and to the study of histopathology due to tissue insults caused by tumors. Furthermore, the importance of proteomics for understanding the cellular and molecular changes as a consequence of the therapy of bladder cancer cannot be neglected. Abstract Bladder cancer (BC) is the most common tumor of the urinary tract and is conventionally classified as either non-muscle invasive or muscle invasive. In addition, histological variants exist, as organized by the WHO-2016 classification. However, innovations in next-generation sequencing have led to molecular classifications of BC. These innovations have also allowed for the tracing of major tumorigenic pathways and, therefore, are positioned as strong supporters of precision medicine. In parallel, immunohistochemistry is still the clinical reference to discriminate histological layers and to stage BC. Key contributions have been made to enlarge the panel of protein immunomarkers. Moreover, the analysis of proteins in liquid biopsy has also provided potential markers. Notwithstanding, their clinical adoption is still low, with very few approved tests. In this context, mass spectrometry-based proteomics has remained a step behind; hence, we aimed to develop them in the community. Herein, the authors introduce the epidemiology and the conventional classifications to review the molecular classification of BC, highlighting the contributions of proteomics. Then, the advances in mass spectrometry techniques focusing on maintaining the integrity of the biological structures are presented, a milestone for the emergence of histoproteomics. Within this field, the review then discusses selected proteins for the comprehension of the pathophysiological mechanisms of BC. Finally, because there is still insufficient knowledge, this review considers proteomics as an important source for the development of BC therapies.
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Affiliation(s)
- Rubén López-Cortés
- Research Unit, Hospital Universitario Lucus Augusti (HULA), Servizo Galego de Saúde (SERGAS), 27002 Lugo, Spain;
| | - Sergio Vázquez-Estévez
- Oncology Division, Hospital Universitario Lucus Augusti (HULA), Servizo Galego de Saúde (SERGAS), 27002 Lugo, Spain; (S.V.-E.); (J.Á.F.)
| | - Javier Álvarez Fernández
- Oncology Division, Hospital Universitario Lucus Augusti (HULA), Servizo Galego de Saúde (SERGAS), 27002 Lugo, Spain; (S.V.-E.); (J.Á.F.)
| | - Cristina Núñez
- Research Unit, Hospital Universitario Lucus Augusti (HULA), Servizo Galego de Saúde (SERGAS), 27002 Lugo, Spain;
- Correspondence:
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15
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Yu Q, Wu C, Chen Y, Li B, Wang R, Huang R, Li X, Gu D, Wang X, Duan X, Li S, Liu Y, Wu W, Hennenberg M, Zeng G. Inhibition of LIM kinase reduces contraction and proliferation in bladder smooth muscle. Acta Pharm Sin B 2021; 11:1914-1930. [PMID: 34386328 PMCID: PMC8343115 DOI: 10.1016/j.apsb.2021.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/17/2020] [Accepted: 11/03/2020] [Indexed: 01/03/2023] Open
Abstract
Overactive bladder (OAB) is the most bothersome symptom in lower urinary tract symptoms (LUTS). Current pharmacologic treatment aims to inhibit detrusor contraction; however, shows unsatisfied efficacy and high discontinuation rate. LIM kinases (LIMKs) promote smooth muscle contraction in the prostate; however, their function in the bladder smooth muscle remains unclear. Here, we studied effects of the LIMK inhibitors on bladder smooth muscle contraction and proliferation both in vitro and in vivo experiments. Bladder expressions of LIMKs are elevated in OAB rat detrusor tissues. Two LIMK inhibitors, SR7826 and LIMKi3, inhibit contraction of human detrusor strip, and cause actin filament breakdown, as well as cell proliferation reduction in cultured human bladder smooth muscle cells (HBSMCs), paralleled by reduced cofilin phosphorylation. Silencing of LIMK1 and LIMK2 in HBSMCs resulted in breakdown of actin filaments and decreased cell proliferation. Treatment with SR7826 or LIMKi3 decreased micturition frequency and bladder detrusor hypertrophy in rats with bladder outlet obstruction. Our study suggests that LIMKs may promote contraction and proliferation in the bladder smooth muscle, which could be inhibited by small molecule LIMK inhibitors. LIMK inhibitors could be a potential therapeutic strategy for OAB- related LUTS.
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Key Words
- 4E-BP1, 4E-binding protein 1
- ADF, actin depolymerizing factors
- BOO, bladder outlet obstruction
- BPH, benign prostatic hyperplasia
- Bladder smooth muscle contraction
- CCK-8, Cell Counting Kit-8
- Cofilin phosphorylation
- Ct, number of cycles
- DMSO, dimethyl sulfoxide
- EdU, 5-ethynyl-2′-deoxyuridine
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- H&E, hematoxylin and eosin
- HBSMCs, human bladder smooth muscle cells
- HRP, horseradish peroxidase
- LIMK
- LIMKs, LIM kinases
- LUTS, lower urinary tract symptoms
- Lower urinary tract symptoms (LUTS)
- MLC, myosin light chain
- MW, molecular weight
- MYPT1, myosin-binding subunit
- OAB, overactive bladder
- Overactive bladder (OAB)
- PCNA, proliferating cell nuclear antigen
- RT-qPCR, reverse transcription and quantitative polymerase chain reaction
- STK16, serine/threonine kinase 16
- TESK1, testicular protein kinase 1
- TXA2, thromboxane A2
- WST-8, 2-(2-methoxy-4-nitrophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium monosodium salt
- siRNA, small interfering RNA
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Affiliation(s)
- Qingfeng Yu
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Chengjie Wu
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Yeda Chen
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Bingsheng Li
- Department of Urology, University Hospital, LMU Munich, Munich 81377, Germany
| | - Ruixiao Wang
- Department of Urology, University Hospital, LMU Munich, Munich 81377, Germany
| | - Ru Huang
- Department of Urology, University Hospital, LMU Munich, Munich 81377, Germany
| | - Xuechun Li
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Di Gu
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Xiaolong Wang
- Department of Urology, University Hospital, LMU Munich, Munich 81377, Germany
| | - Xiaolu Duan
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Shujue Li
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Yang Liu
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Wenqi Wu
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Martin Hennenberg
- Department of Urology, University Hospital, LMU Munich, Munich 81377, Germany
| | - Guohua Zeng
- Department of Urology and Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
- Corresponding author. Tel.: +86 20 34294165.
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16
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Tomilovskaya E, Amirova L, Nosikova I, Rukavishnikov I, Chernogorov R, Lebedeva S, Saveko A, Ermakov I, Ponomarev I, Zelenskaya I, Shigueva T, Shishkin N, Kitov V, Riabova A, Brykov V, Abu Sheli N, Vassilieva G, Orlov O. The First Female Dry Immersion (NAIAD-2020): Design and Specifics of a 3-Day Study. Front Physiol 2021; 12:661959. [PMID: 34194336 PMCID: PMC8236811 DOI: 10.3389/fphys.2021.661959] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 05/19/2021] [Indexed: 11/17/2022] Open
Abstract
This article describes procedures and some results of the first study of females undergoing 3-day Dry Immersion. The experiment “NAIAD-2020” was carried out at the Institute of Biomedical Problems (Moscow, Russia) with the participation of six healthy women volunteers (age 30.17 ± 5.5 years, height 1.66 ± 0.1 m, weight 62.05 ± 8.4 kg, BMI 22.39 ± 2.2 kg/m2) with a natural menstrual cycle. During the study, a standard protocol was used, the same as for men, with a minimum period of time spent outside the immersion bath. Before, during and after Immersion, 22 experiments were carried out aimed at studying the neurophysiological, functional, metabolic and psychophysiological functions of the body, the results of which will be presented in future publications. The total time outside the bath for women did not exceed that for men. Systolic and diastolic pressure did not significantly change during the immersion. In the first 24 h after the end of the immersion, heart rate was significantly higher than the background values [F(4,20) = 14.67; P < 0.0001]. Changes in body temperature and water balance were consistent with the patterns found in men. No significant changes in height and weight were found during immersion. All women reported general discomfort and pain in the abdomen and back. The results of this study did not find significant risks to women’s health and showed the feasibility of using this model of the effects of space flight in women of reproductive age.
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Affiliation(s)
- Elena Tomilovskaya
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Liubov Amirova
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Inna Nosikova
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Ilya Rukavishnikov
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Roman Chernogorov
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Svetlana Lebedeva
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Alina Saveko
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Ivan Ermakov
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Ivan Ponomarev
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Inna Zelenskaya
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Tatiana Shigueva
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Nikita Shishkin
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Vladimir Kitov
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Alexandra Riabova
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Vitaly Brykov
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Nelly Abu Sheli
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Galina Vassilieva
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Oleg Orlov
- Russian Federation State Scientific Center - Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
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17
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Engin S, Kaya Yasar Y, Barut EN, Getboga D, Erac Y, Sezen SF. The inhibitory effect of trimetazidine on detrusor contractility - a potential repositioning of trimetazidine for the treatment of overactive bladder. J Pharm Pharmacol 2021; 74:94-102. [PMID: 34109981 DOI: 10.1093/jpp/rgab072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/27/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVES This study aimed to identify the effect of trimetazidine (TMZ), an antianginal drug, on detrusor smooth muscle (DSM) contractility and its possible mechanisms of action. METHODS We performed in-vitro contractility studies on isolated mouse DSM strips and investigated the effect of TMZ on Ca2+ levels in fura-2-loaded A7r5 cells. KEY FINDINGS TMZ (300 or 1000 µM) inhibited carbachol (CCh)- and KCl-induced contractions and produced a concentration-dependent (10-1000 µM) relaxation in KCl-precontracted DSM strips. TMZ-induced relaxation was markedly decreased by BaCl2, an inward-rectifying K+ channel blocker, but was not altered by preincubation with tetraethylammonium, glibenclamide, 4-aminopyridine, propranolol, L-NAME or methylene blue. TMZ (300 or 1000 µM) reduced both the CaCl2-induced contraction of depolarized DSM strips under Ca2+-free conditions and the CCh-induced contraction of DSM strips preincubated with nifedipine in Ca2+-containing Krebs solution. Furthermore, TMZ (1000 µM) significantly decreased the Ca2+ levels in fura-2-loaded A7r5 cells. CONCLUSIONS TMZ decreased DSM contractility and caused a concentration-dependent relaxation of the tissue possibly through its actions on Ca2+ transients and K+ channels. Our results provide preclinical evidence that TMZ would be a potential candidate to treat disorders related to the overactivity of the bladder.
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Affiliation(s)
- Seckin Engin
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Yesim Kaya Yasar
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey.,Drug and Pharmaceutical Technology Application and Research Center, Karadeniz Technical University, Trabzon, Turkey
| | - Elif Nur Barut
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Damla Getboga
- Department of Pharmacology, Faculty of Pharmacy, Ege University, İzmir, Turkey
| | - Yasemin Erac
- Department of Pharmacology, Faculty of Pharmacy, Ege University, İzmir, Turkey
| | - Sena F Sezen
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey.,Drug and Pharmaceutical Technology Application and Research Center, Karadeniz Technical University, Trabzon, Turkey
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18
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Othman MA, Ezzat HM, Rizk DEE, Kamal AH, Al-Mahameed AE, Marwani AM, Bindyna KM, Salvatore S. Induction of bacterial cystitis in female rabbits by uropathogenic Escherichia coli and the differences between the bladder dome and trigone. Ultrastruct Pathol 2021; 45:159-166. [PMID: 34030600 DOI: 10.1080/01913123.2021.1920653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study is designed to evaluate the histological effects of uropathogenic Escherichia coli (UPEC) infection in the urinary bladder of female rabbits and compare the differences between the dome and trigone. Bacterial cystitis was induced in 13 female rabbits by transurethral inoculation of UPEC into the urinary bladder. Eight animals served as controls. Urine samples were collected by catheterization and cultured for bacterial growth after 12 and 24 hours then every 48 hours. Infection was defined as ≥(1X105) colony-forming unit/ml of UPEC in the first two urine samples. Bladder dome and trigonal specimens were examined by light and scanning electron microscopy eight days after infection. There was a sustained increase in bacterial count, with urethral bleeding and rabbit weakness suggesting bladder colonization in the 10/13 study group (77%). Infection was not demonstrated in two animals and was spontaneously cleared in the third after 48 hours. No control animals developed an infection. In infected rabbits (n = 10), the dome showed inflammatory changes including the epithelial loss or thinning, inflammatory cell infiltration, and congested blood vessels compared to controls. The trigone showed a more pronounced inflammatory response than the dome. The presence of urinary bacterial growth, infection manifestations, and inflammatory changes that were more severe in the trigone than in the dome indicate successful bacterial inoculation and induction of cystitis. This animal model can be used for clinical trials on female cystitis. Our histological findings support a possible role of trigone in the pathogenesis of urinary tract infection.
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Affiliation(s)
- Manal A Othman
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.,Department of Histology, Faculty of Medicine, Assiut University, Assuit, Egypt
| | - Hicham M Ezzat
- Department of Microbiology, Immunology & Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.,Department of Microbiology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Diaa E E Rizk
- Department of Obstetrics and Gynecology, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Amer H Kamal
- Department of Physiology, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Ali E Al-Mahameed
- Department of Microbiology, Immunology & Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Ammar M Marwani
- Animal Facility Laboratory Manager, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Khalid M Bindyna
- Department of Microbiology, Immunology & Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Stefano Salvatore
- Urogynecology Unit, Department of Obstetrics and Gynecology, Vita-Salute San Raffaele University, Milan, Italy
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19
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Turner AC, Powers SA, Odom MR, Pak ES, Ashcraft KA, Koontz BF, Hannan JL. Impact of prostatic radiation therapy on bladder contractility and innervation. Neurourol Urodyn 2021; 40:1470-1478. [PMID: 34015163 DOI: 10.1002/nau.24705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/03/2021] [Accepted: 05/06/2021] [Indexed: 11/10/2022]
Abstract
AIMS To determine the effect of prostatic radiation therapy (RT) on bladder contractility and morphology, and axon, or neuron profiles within the detrusor and major pelvic ganglia (MPG) in male rats. METHODS Male Sprague-Dawley rats (8 weeks) received a single dose of prostatic RT (0 or 22 Gy). Bladders and MPG were collected 2- and 10-weeks post-RT. Detrusor contractile responses to carbachol and electrical field stimulation (EFS) were measured. Bladders were stained with Masson's trichrome, and antibodies for nonspecific neuronal marker, cholinergic nerve marker choline acetyltransferase (ChAT), and alpha-smooth muscle actin. MPG gene expression was assessed by quantitative polymerase chain reaction for ubiquitin carboxy-terminal hydrolase L1 (Uchl1) and Chat. RESULTS At 2 weeks post-RT, bladder smooth muscle, detrusor cholinergic axon profiles, and MPG Chat gene expression were increased (p < .05), while carbachol and EFS-mediated contractions were decreased (p < .05). In contrast, at 10 weeks post-RT, nerve-mediated contractions were increased compared with control (p < .05), while bladder smooth muscle, detrusor cholinergic axon profiles, MPG Chat expression, and carbachol contractions had normalized. At both 2- and 10-weeks post-RT, there was no change in detrusor nonspecific axon profiles and MPG Uchl1 expression. CONCLUSION In a rat model, RT of the prostate and MPG was associated with early changes in MPG Chat gene expression, and bladder cholinergic axon profiles and smooth muscle content which resolved over time. After RT recovery, bladder contractility decreased early and increased by 10 weeks. Long-term changes to the MPG and increased bladder cholinergic axons may contribute to RT-induced bladder dysfunction in prostate cancer survivors.
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Affiliation(s)
- Alexander C Turner
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Shelby A Powers
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA.,Department of Psychiatry & Behavioral Sciences, Duke University, Durham, North Carolina, USA
| | - Michael R Odom
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA.,Division of Urology, Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Elena S Pak
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Kathleen A Ashcraft
- Department of Radiation Oncology, Duke University, Durham, North Carolina, USA
| | - Bridget F Koontz
- Department of Radiation Oncology, Duke University, Durham, North Carolina, USA
| | - Johanna L Hannan
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
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20
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Lu Y, Fog-Poulsen K, Nørregaard R, Djurhuus JC, Olsen LH. Gender-dependent bladder response to one-day bladder outlet obstruction. J Pediatr Urol 2021; 17:170.e1-170.e10. [PMID: 33487568 DOI: 10.1016/j.jpurol.2020.12.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 11/22/2020] [Accepted: 12/28/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Development of bladder fibrosis, loss of compliance, and voiding dysfunction are among the severe consequences of various lower urinary conditions, for example, bladder outlet obstruction (BOO), neurogenic bladder, and radiotherapy to the pelvic area. The bladder remodelling results in significant changes in bladder function and architecture, and may ultimately be deleterious for kidney function. The molecular signals underlying pathologic bladder remodelling, as well as the impact of gender, remain poorly understood. OBJECTIVE To investigate the bladder remodelling after one day BOO, whether the remodelling is different between different bladder sections, and whether genders may affect the remodelling. STUDY DESIGN Thirty male and 30 female C57BL/6NRj mice were randomly divided into Control, Sham and BOO groups with ten mice per group. A 24-h total urethral obstruction was performed at the proximal urethra. Histological changes were observed via H&E, trichrome and immunohistochemistry staining. Harvested bladders were divided into upper and lower sections for analysis. Protein and gene expression were detected by Western blotting and qPCR. RESULTS No significant changes in bladder wall thickness were observed following BOO, while increased bladder mass after BOO was found in female mice only. We detected FN and ⍺-SMA upregulation in the male upper bladder segment. Female BOO mice bladders showed increased α-SMA expression in both bladder segments, but no difference of FN was observed in either bladder segments. BOO-induced upregulation of TGF-β and Gremlin were detected in both male and female bladders, while downregulation of BMP-7 was detected only in male bladders. Furthermore, phosphorylation of both SMAD2/3 and SMAD1/5/9 were increased in male bladders following BOO, whereas female mice exhibited increased pSMAD2/3 in the upper and increased pSMAD1/5/9 in the lower bladder segment. CONCLUSIONS Our data indicate that some specific proteins and growth factors were detected as early alterations of tissue which may lead to fibrosis. In addition, the males tended to have more pronounced response than females. However, the causes and consequences of the findings need to be further investigated.
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Affiliation(s)
- Yutao Lu
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark.
| | | | - Rikke Nørregaard
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | | | - L Henning Olsen
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark; Department of Urology, Aarhus University Hospital, Aarhus N, Denmark
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21
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Cohesive cancer invasion of the biophysical barrier of smooth muscle. Cancer Metastasis Rev 2021; 40:205-219. [PMID: 33398621 DOI: 10.1007/s10555-020-09950-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 12/15/2020] [Indexed: 01/22/2023]
Abstract
Smooth muscle is found around organs in the digestive, respiratory, and reproductive tracts. Cancers arising in the bladder, prostate, stomach, colon, and other sites progress from low-risk disease to high-risk, lethal metastatic disease characterized by tumor invasion into, within, and through the biophysical barrier of smooth muscle. We consider here the unique biophysical properties of smooth muscle and how cohesive clusters of tumor use mechanosensing cell-cell and cell-ECM (extracellular matrix) adhesion receptors to move through a structured muscle and withstand the biophysical forces to reach distant sites. Understanding integrated mechanosensing features within tumor cluster and smooth muscle and potential triggers within adjacent adipose tissue, such as the unique damage-associated molecular pattern protein (DAMP), eNAMPT (extracellular nicotinamide phosphoribosyltransferase), or visfatin, offers an opportunity to prevent the first steps of invasion and metastasis through the structured muscle.
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22
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Physiopathologie du syndrome clinique d’hyperactivité vésicale. Prog Urol 2020; 30:873-879. [DOI: 10.1016/j.purol.2020.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 11/20/2022]
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23
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Manak I, Gurney AM, McCloskey KD, Woolf AS, Roberts NA. Dysfunctional bladder neurophysiology in urofacial syndrome
Hpse2
mutant mice. Neurourol Urodyn 2020; 39:1930-1938. [DOI: 10.1002/nau.24450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 06/22/2020] [Indexed: 01/08/2023]
Affiliation(s)
- Imerjit Manak
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, Manchester University NHS Foundation Trust, Manchester Academic Health Science CentreUniversity of ManchesterManchester UK
| | - Alison M. Gurney
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology Medicine and HealthUniversity of ManchesterManchester UK
| | - Karen D. McCloskey
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfast UK
| | - Adrian S. Woolf
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, Manchester University NHS Foundation Trust, Manchester Academic Health Science CentreUniversity of ManchesterManchester UK
| | - Neil A. Roberts
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, Manchester University NHS Foundation Trust, Manchester Academic Health Science CentreUniversity of ManchesterManchester UK
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24
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Praveen Rajneesh C, Yang LY, Chen SC, Hsieh TH, Chin HY, Peng CW. Cystometric Measurements in Rats with an Experimentally Induced Traumatic Brain Injury and Voiding Dysfunction: A Time-Course Study. Brain Sci 2019; 9:brainsci9110325. [PMID: 31739594 PMCID: PMC6895874 DOI: 10.3390/brainsci9110325] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/08/2019] [Accepted: 11/12/2019] [Indexed: 12/13/2022] Open
Abstract
Traumatic brain injuries (TBIs) are a serious public health issue worldwide with increased mortality as well as severe disabilities and injuries caused by falls and road accidents. Unfortunately, there is no approved therapy for TBIs, and bladder dysfunction is a striking symptom. Accordingly, we attempted to analyze bladder dysfunction and voiding efficiency in rats with a TBI at different time-course intervals. Time-dependent analyses were scheduled from the next day until four weeks after a TBI. Experimental animals were grouped and analyzed under the above conditions. Cystometric measurements were used for this analysis and were further elaborated as external urethral sphincter electromyographic (EUS-EMG) activity and cystometrogram (CMG) measurements. Moreover, magnetic resonance imaging (MRI) studies were conducted to investigate secondary injury progression in TBI rats, and results were compared to normal control (NC) rats. Results of EUS-EMG revealed that the burst period, active period, and silent period in TBI rats were drastically reduced compared to NC rats, but they increased later and reached a stagnant phase. Likewise, in CMG measurements, bladder function, the voided volume, and voiding efficiency decreased immediately after the TBI, and other parameters like the volume threshold, inter-contraction interval, and residual volume drastically increased. Later, those levels changed, and all observed results were compared to NC rats. MRI results revealed the prevalence of cerebral edema and the progression of secondary injury. All of the above-stated results of the experiments were extensively substantiated. Thus, these innovative findings of our study model will surely pave the way for new therapeutic interventions for TBI treatment and prominently highlight their applications in the field of neuroscience in the future.
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Affiliation(s)
- Chellappan Praveen Rajneesh
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei-11031, Taiwan
| | - Ling-Yu Yang
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei-11031, Taiwan
| | - Shih-Ching Chen
- Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, Taipei-11031, Taiwan
- Department of Physical Medicine and Rehabilitation, Taipei Medical University Hospital, Taipei-11031, Taiwan
| | - Tsung-Hsun Hsieh
- Department of Physical Therapy and Graduate Institute of Rehabilitation Science, College of Medicine, Chang Gung University, Taoyuan-33302, Taiwan
- Neuroscience Research Center, Chang Gung Memorial Hospital, Linkou-33305, Taiwan
| | - Hung-Yen Chin
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei-11031, Taiwan
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei-11031, Taiwan
| | - Chih-Wei Peng
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei-11031, Taiwan
- Research Center of Biomedical Device, Taipei Medical University, Taipei-11031, Taiwan
- Correspondence: ; Tel./Fax: +886-2-2736-1661 (ext. 3070)
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25
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Jack S, Madhivanan K, Ramadesikan S, Subramanian S, Edwards DF, Elzey BD, Dhawan D, McCluskey A, Kischuk EM, Loftis AR, Truex N, Santos M, Lu M, Rabideau A, Pentelute B, Collier J, Kaimakliotis H, Koch M, Ratliff TL, Knapp DW, Aguilar RC. A novel, safe, fast and efficient treatment for Her2-positive and negative bladder cancer utilizing an EGF-anthrax toxin chimera. Int J Cancer 2019; 146:449-460. [PMID: 31584195 DOI: 10.1002/ijc.32719] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/10/2019] [Accepted: 09/11/2019] [Indexed: 12/20/2022]
Abstract
Bladder cancer is the sixth most common cancer in the United States, and it exhibits an alarming 70% recurrence rate. Thus, the development of more efficient antibladder cancer approaches is a high priority. Accordingly, this work provides the basis for a transformative anticancer strategy that takes advantage of the unique characteristics of the bladder. Unlike mucin-shielded normal bladder cells, cancer cells are exposed to the bladder lumen and overexpress EGFR. Therefore, we used an EGF-conjugated anthrax toxin that after targeting EGFR was internalized and triggered apoptosis in exposed bladder cancer cells. This unique agent presented advantages over other EGF-based technologies and other toxin-derivatives. In contrast to known agents, this EGF-toxin conjugate promoted its own uptake via receptor microclustering even in the presence of Her2 and induced cell death with a LC50 < 1 nM. Furthermore, our data showed that exposures as short as ≈3 min were enough to commit human (T24), mouse (MB49) and canine (primary) bladder cancer cells to apoptosis. Exposure of tumor-free mice and dogs with the agent resulted in no toxicity. In addition, the EGF-toxin was able to eliminate cells from human patient tumor samples. Importantly, the administration of EGF-toxin to dogs with spontaneous bladder cancer, who had failed or were not eligible for other therapies, resulted in ~30% average tumor reduction after one treatment cycle. Because of its in vitro and in vivo high efficiency, fast action (reducing treatment time from hours to minutes) and safety, we propose that this EGF-anthrax toxin conjugate provides the basis for new, transformative approaches against bladder cancer.
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Affiliation(s)
- Sherwin Jack
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Kayalvizhi Madhivanan
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Swetha Ramadesikan
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Sneha Subramanian
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Daniel F Edwards
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Bennett D Elzey
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN.,Department of Urology, Indiana University School of Medicine, Indianapolis, IN
| | - Deepika Dhawan
- Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN
| | | | - Erin M Kischuk
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN
| | - Alexander R Loftis
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Nicholas Truex
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Michael Santos
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Mike Lu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Amy Rabideau
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Bradley Pentelute
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA.,Koch Institute MIT, Cambridge, MA.,Broad Institute of Harvard and MIT, Cambridge, MA.,Center for Environmental Health Sciences MIT, Cambridge, MA
| | - John Collier
- Department of Microbiology, Harvard Medical School, Boston, MA
| | | | - Michael Koch
- Department of Urology, Indiana University School of Medicine, Indianapolis, IN
| | - Timothy L Ratliff
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN
| | - Deborah W Knapp
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN
| | - Ruben C Aguilar
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
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26
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Chua ME, Farhat WA, Ming JM, McCammon KA. Review of clinical experience on biomaterials and tissue engineering of urinary bladder. World J Urol 2019; 38:2081-2093. [PMID: 31222507 DOI: 10.1007/s00345-019-02833-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/30/2019] [Indexed: 12/12/2022] Open
Abstract
PURPOSE In recent pre-clinical studies, biomaterials and bladder tissue engineering have shown promising outcomes when addressing the need for bladder tissue replacement. To date, multiple clinical experiences have been reported. Herein, we aim to review and summarize the reported clinical experience of biomaterial usage and tissue engineering of the urinary bladder. METHODS A systematic literature search was performed on Feb 2019 to identify clinical reports on biomaterials for urinary bladder replacement or augmentation and clinical experiences with bladder tissue engineering. We identified and reviewed human studies using biomaterials and tissue-engineered bladder as bladder substitutes or augmentation implants. The studies were then summarized for each respective procedure indication, technique, follow-up period, outcome, and important findings of the studies. RESULTS An extensive literature search identified 25 studies of case reports and case series with a cumulative clinical experience of 222 patients. Various biomaterials and tissue-engineered bladder were used, including plastic/polyethylene mold, preserved dog bladder, gelatine sponge, Japanese paper with Nobecutane, lypholized human dura, bovine pericardium, amniotic membrane, small intestinal mucosa, and bladder tissue engineering with autologous cell-seeded biodegradable scaffolds. However, overall clinical experiences including the outcomes and safety reports were not satisfactory enough to replace enterocystoplasty. CONCLUSION To date, several clinical experiences of biomaterials and tissue-engineered bladder have been reported; however, various studies have reported non-satisfactory outcomes. Further technological advancements and a better understanding is needed to advance bladder tissue engineering as a future promising management option for patients requiring bladder drainage.
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Affiliation(s)
- Michael E Chua
- Eastern Virginia Medical School, Norfolk, VA, USA.,St. Luke's Medical Center, Quezon City, NCR, Philippines
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27
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Ishii T, Ho CK, Nahas H, Yiu BYS, Chee AJY, Yu ACH. Deformable phantoms of the prostatic urinary tract for urodynamic investigations. Med Phys 2019; 46:3034-3043. [PMID: 31049993 DOI: 10.1002/mp.13558] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/03/2019] [Accepted: 04/23/2019] [Indexed: 01/20/2023] Open
Abstract
PURPOSE Assessment of urethral dynamics is clinically regarded to be important in analyzing the functional impact of pathological features like urethral obstruction, albeit it is difficult to perform directly in vivo. To facilitate such an assessment, urethra phantoms may serve well as investigative tools by reconstructing urethral dynamics based on anthropomorphic factors. Here, our aim is to design a new class of anatomically realistic, deformable urethra phantoms that can simulate the geometric, mechanical, and hydrodynamic characteristics of the male prostatic urethra. METHODS A new lost-core tube casting protocol was devised. It first involved the drafting of urethra geometry in computer-aided design software. Next, 3D printing was used to fabricate the urethra geometry and an outer mold. These parts were then used to cast a urinary tract using a polyvinyl alcohol (PVA)-based material (with 26.6 ± 4.0 kPa Young's elastic modulus). After forming a surrounding tissue-mimicking slab using an agar-gelatin mixture (with 17.4 ± 3.4 kPa Young's modulus), the completed urethra phantom was connected to a flow circuit that simulates voiding. To assess the fabricated phantoms' morphology, ultrasound imaging was performed over different planes. Also, color Doppler imaging was performed to visualize the flow profile within the urinary tract. RESULTS Deformable phantoms were devised for the normal urethra and a diseased urethra with obstruction due to benign prostatic hyperplasia (BPH). During voiding, the short-axis lumen diameter at the verumontanum of the BPH-featured phantom (0.91 ± 0.08 mm) was significantly smaller than that for the normal phantom (2.49 ± 0.20 mm). Also, the maximum flow velocity of the BPH-featured phantom (59.3 ± 5.8 cm/s; without Doppler angle correction) was found to be higher than that of the normal phantom (22.7 ± 9.0 cm/s). CONCLUSION The fabricated phantoms were effective in simulating urethra deformation resulting from urine passage during voiding. They can be used for mechanistic studies of urethral dynamics and for the testing of urodynamic diagnostic techniques in urology.
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Affiliation(s)
- Takuro Ishii
- Research Institute for Aging and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Chung Kit Ho
- Research Institute for Aging and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Hassan Nahas
- Research Institute for Aging and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Billy Y S Yiu
- Research Institute for Aging and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Adrian J Y Chee
- Research Institute for Aging and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Alfred C H Yu
- Research Institute for Aging and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON, Canada
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28
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Molecular Characteristics of Underactive Bladder. CURRENT BLADDER DYSFUNCTION REPORTS 2019. [DOI: 10.1007/s11884-019-00512-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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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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30
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Albers KI, Martini CH, Scheffer GJ, Warlé MC. Letter to the editor: considering the effects of deep neuromuscular blockade on endoscopic surgical conditions during transurethral resection of a bladder tumor (TURB). World J Urol 2018; 36:2093-2094. [PMID: 30039389 DOI: 10.1007/s00345-018-2417-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 07/18/2018] [Indexed: 11/28/2022] Open
Affiliation(s)
- K I Albers
- Department of Surgery, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, The Netherlands. .,Department of Anesthesiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, The Netherlands.
| | - C H Martini
- Department of Anesthesiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - G J Scheffer
- Department of Anesthesiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, The Netherlands
| | - M C Warlé
- Department of Surgery, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, The Netherlands
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Shi C, Chen W, Chen B, Shan T, Jia W, Hou X, Li L, Ye G, Dai J. Bladder regeneration in a canine model using a bladder acellular matrix loaded with a collagen-binding bFGF. Biomater Sci 2018; 5:2427-2436. [PMID: 29046907 DOI: 10.1039/c7bm00806f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Bladder reconstruction remains challenging for urological surgery due to lack of suitable regenerative scaffolds. In a previous study, we had used a collagen-binding basic fibroblast growth factor (CBD-bFGF) to bind bFGF to the collagen scaffold, which could promote bladder regeneration in rats. However, the limited graft size in rodent models cannot provide enough evidence to demonstrate the repair capabilities of this method for severely damaged bladders in humans or large animals. In this study, the CBD-bFGF was used to activate a bladder acellular matrix (BAM) scaffold, and the CBD-bFGF/BAM functional scaffold was assessed in a canine model with a large segment defect (half of the entire bladder was resected). The results demonstrated that the functional biomaterials could promote bladder smooth muscle, vascular, and nerve regeneration and improve the function of neobladders. Thus, the CBD-bFGF/BAM functional scaffold may be a promising biomaterial for bladder reconstruction.
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Affiliation(s)
- Chunying Shi
- Department of Human anatomy, Histology and Embryology, College of Medicine, Qingdao University, Qingdao, 266021, China
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Sakamoto K, Noguchi Y, Ueshima K, Yamakuni H, Ohtake A, Sato S, Ishizu K, Hosogai N, Kawaminami E, Takeda M, Masuda N. Effect of ASP6432, a Novel Type 1 Lysophosphatidic Acid Receptor Antagonist, on Urethral Function and Prostate Cell Proliferation. J Pharmacol Exp Ther 2018; 366:390-396. [DOI: 10.1124/jpet.118.247908] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 05/30/2018] [Indexed: 12/31/2022] Open
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33
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Kazaryan KV, Danielyan MA, Chibukhchyan RG, Margaryan SG. Histamine-Mediated Regulation of Electrical Activity during the Bladder–Urethra Interaction in Rats. J EVOL BIOCHEM PHYS+ 2018. [DOI: 10.1134/s0022093018010064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Homozygous deletion in MYL9 expands the molecular basis of megacystis-microcolon-intestinal hypoperistalsis syndrome. Eur J Hum Genet 2018; 26:669-675. [PMID: 29453416 DOI: 10.1038/s41431-017-0055-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 11/14/2017] [Accepted: 11/18/2017] [Indexed: 12/11/2022] Open
Abstract
Megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS) is a severe disease characterized by functional obstruction in the urinary and gastrointestinal tract. The molecular basis of this condition started to be defined recently, and the genes related to the syndrome (ACTG2-heterozygous variant in sporadic cases; and MYH11 (myosin heavy chain 11), LMOD1 (leiomodin 1) and MYLK (myosin light chain (MLC) kinase)-autosomal recessive inheritance), encode proteins involved in the smooth muscle contraction, supporting a myopathic basis for the disease. In the present article, we described a family with two affected siblings with MMIHS born to consanguineous parents and the molecular investigation performed to define the genetic etiology. Previous whole exome sequencing of the affected child and parents did not identify a candidate gene for the disease in this family, but now we present a reanalysis of the data that led to the identification of a homozygous deletion encompassing the last exon of MYL9 (myosin regulatory light chain 9) in the affected individual. MYL9 gene encodes a regulatory myosin MLC and the phosphorylation of this protein is a crucial step in the contraction process of smooth muscle cell. Despite the absence of human or animal phenotype related to MYL9, a cause-effect relationship between MYL9 and the MMIHS seems biologically plausible. The present study reveals a strong candidate gene for autosomal recessive forms of MMIHS, expanding the molecular basis of this disease and reinforces the myopathic basis of this condition.
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35
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Al Adem KM, Bawazir SS, Hassen WA, Khandoker AH, Khalaf K, McGloughlin T, Stefanini C. Implantable Systems for Stress Urinary Incontinence. Ann Biomed Eng 2017; 45:2717-2732. [PMID: 29022114 DOI: 10.1007/s10439-017-1939-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 09/29/2017] [Indexed: 01/23/2023]
Abstract
Stress urinary incontinence (SUI), the involuntary urine leakage due to failure of the urethral closure mechanism, is a global health challenge with substantial human suffering and socioeconomic costs. Approximately 167 million male and female patients are predicted to suffer from SUI in 2018, worldwide. A wide range of surgical interventions are available for the treatment of SUI. Severe cases, however, usually require the implantation of artificial urinary sphincter devices. This review comparatively presents and analyzes the working principles, as well as the challenges, associated with the current implantable SUI systems in clinical use. These include slings, urethral bulking agents, artificial urinary sphincters, and adjustable continence devices. It further reports on recent research progress and state-of-the-art in the field of SUI implants, including an original approach proposed by the authors with a pressure feedback sensory mechanism. The new emerging field of artificial muscle devices, including electroactive polymers, provides a promising innovative solution for replacing the weakened urethral sphincter in SUI patients.
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Affiliation(s)
- Kenana M Al Adem
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE
| | - Sarah S Bawazir
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE
| | - Waleed A Hassen
- Cleveland Clinic Lerner College of Medicine of Case Western University, Cleveland, OH, USA
- Urology, Surgical Subspecialties Institute, Cleveland Clinic, Abu Dhabi, UAE
| | - Ahsan H Khandoker
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE
| | - Kinda Khalaf
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE
| | - Tim McGloughlin
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE
| | - Cesare Stefanini
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE.
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Kazaryan KV, Chibukhchyan RG, Margaryan SG. Characterization of spontaneous electrical activity of the urinary tract: Ureter, bladder, urethra. J EVOL BIOCHEM PHYS+ 2017. [DOI: 10.1134/s002209301704007x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Rocha JN. Effect of S-methyl-l-thiocitrulline dihydrochloride on rat micturition reflex. Int Braz J Urol 2016; 42:1018-1027. [PMID: 24893916 PMCID: PMC5066901 DOI: 10.1590/s1677-5538.ibju.2015.0153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 01/19/2016] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVE To evaluate the effect of neuronal nitric oxide synthase on the striated urethral sphincter and the urinary bladder. MATERIALS AND METHODS A coaxial catheter was implanted in the proximal urethra and another one in the bladder of female rats, which were anesthetized with subcutaneous injection of urethane. The urethral pressure with saline continuous infusion and bladder isovolumetric pressure were simultaneously recorded. Two groups of rats were formed. In group I, an intrathecal catheter was implanted on the day of the experiment at the L6-S1 level of the spinal cord; in group II, an intracerebroventricular cannula was placed 5-6 days before the experiment. RESULTS It was verified that the group treated with S-methyl-L-thio-citrulline, via intrathecal pathway, showed complete or partial inhibition of the urethral sphincter relaxation and total inhibition of the micturition reflexes. The urethral sphincter and the detrusor functions were recovered after L-Arginine administration. When S-methyl-Lthio-citrulline was administered via intracerebroventricular injection, there was a significant increase of urethral sphincter tonus while preserving the sphincter relaxation and the detrusor contractions, at similar levels as before the use of the drugs. Nevertheless there was normalization of the urethral tonus when L-Arginine was applied. CONCLUSIONS The results indicate that, in female rats anaesthetized with urethane, the nNOS inhibitor administrated through the intrathecal route inhibits urethral sphincter relaxation, while intracerebroventricular injection increases the sphincter tonus, without changing bladder function. These changes were reverted by L-Arginine administration. These findings suggest that the urethral sphincter and detrusor muscle function is modulated by nitric oxide.
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Affiliation(s)
- Jeová Nina Rocha
- Divisão de Urologia, Faculdade de Medicina Ribeirão Preto, Universidade de São Paulo, SP, Brasil
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Martin-Cano FE, Caso-Agundez M, Camello-Almaraz C, Santos FJ, Espin MT, Madrid JA, Diez-Perez A, Camello PJ, Pozo MJ. Octodon degus, a new model to study the agonist and plexus-induced response in the urinary bladder. J Physiol Biochem 2016; 73:77-87. [PMID: 27738973 DOI: 10.1007/s13105-016-0527-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 10/03/2016] [Indexed: 01/17/2023]
Abstract
Urinary bladder function consists in the storage and controlled voiding of urine. Translational studies require animal models that match human characteristics, such as Octodon degus, a diurnal rodent. This study aims to characterize the contractility of the detrusor muscle and the morphology and code of the vesical plexus from O. degus. Body temperature was measured by an intra-abdominal sensor, the contractility of detrusor strips was evaluated by isometric tension recording, and the vesical plexus was studied by electrical field stimulation (EFS) and immunofluorescence. The animals showed a diurnal chronotype as judged from core temperature. The myogenic contractile response of the detrusor muscle to increasing doses of KCl reached its maximum (31.04 mN/mm2) at 60 mM. In the case of cumulative dose-response of bethanecol, the maximum response (37.42 mN/mm2) was reached at 3.2 × 10-4 M. The response to ATP was clearly smaller (3.8 mN/mm2). The pharmacological dissection of the EFS-induced contraction identified ACh and sensory fibers as the main contributors to this response. The neurons of the vesical plexus were located mainly in the trigone area, grouped in big and small ganglia. Out of them, 48.1 % of the neurons were nitrergic and 62.7 % cholinergic. Our results show functional and morphological similarities between the urinary bladder of O. degus and that of humans.
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Affiliation(s)
- Francisco Eduardo Martin-Cano
- Department of Physiology, Faculty of Nursing and Occupational Therapy, University of Extremadura, 10003, Caceres, Spain
| | - Mercedes Caso-Agundez
- Department of Physiology, Faculty of Nursing and Occupational Therapy, University of Extremadura, 10003, Caceres, Spain
| | - Cristina Camello-Almaraz
- Department of Physiology, Faculty of Nursing and Occupational Therapy, University of Extremadura, 10003, Caceres, Spain
| | | | - María Teresa Espin
- Digestive Surgery Service, "Infanta Cristina" Hospital, 06006, Badajoz, Spain
| | - Juan Antonio Madrid
- Chronobiology Laboratory, College of Biology, University of Murcia, IMIB-Arrixaca, 30100, Murcia, Spain
| | - Adolfo Diez-Perez
- Musculoskeletal research group, Red Temática de Investigación Cooperativa en Envejecimiento y Fragilidad (RETICEF), ISCIII, IMIM (Hospital del Mar Research Institute), Barcelona, Spain
| | - Pedro Javier Camello
- Department of Physiology, Faculty of Nursing and Occupational Therapy, University of Extremadura, 10003, Caceres, Spain
| | - Maria Jose Pozo
- Department of Physiology, Faculty of Nursing and Occupational Therapy, University of Extremadura, 10003, Caceres, Spain.
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Guan NN, Svennersten K, de Verdier PJ, Wiklund NP, Gustafsson LE. Prostaglandin D 2 effects and DP 1 /DP 2 receptor distribution in guinea pig urinary bladder out-flow region. J Cell Mol Med 2016; 21:234-243. [PMID: 27664012 PMCID: PMC5264142 DOI: 10.1111/jcmm.12959] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 07/21/2016] [Indexed: 12/23/2022] Open
Abstract
The proximal urethra and urinary bladder trigone play important roles in continence. We have previously shown that PGD2 is released from guinea pig bladder urothelium/suburothelium and can inhibit detrusor contractile responses. We presently wished to investigate PGD2 actions in guinea pig out‐flow region and the distribution of DP1/DP2 receptors. The effects of PGD2 on urothelium‐intact trigone and proximal urethra contractility were studied in organ bath experiments. Expression of DP1/DP2 receptor proteins was analysed by western blot. Immunohistochemistry was used to identify distribution of DP1/DP2 receptors. PGD2 in a dose‐dependent manner inhibited trigone contractions induced by electrical field stimulation (EFS) and inhibited spontaneous contractions of the proximal urethra. PGD2 was equally (trigone) or slightly less potent (urethra) compared with PGE2. Expression of DP1 and DP2 receptors was found in male guinea pig bladder trigone, neck and proximal urethra. In the trigone and proximal urethra, DP1 receptors were found on the membrane of smooth muscle cells and weak immunoreactivty was observed in the urothelium. DP2 receptors were distributed more widespread, weakly and evenly in the urothelium and smooth muscles. Inhibitory effects by PGD2 on motor activity of guinea pig trigone and proximal urethra are consistent with finding DP1 and DP2 receptors located in the urothelium and smooth muscle cells of the trigone and proximal urethra, and PGD2 may therefore be a modulator of the bladder out‐flow region, possibly having a function in regulation of micturition and a role in overactive bladder syndrome.
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Affiliation(s)
- Na N Guan
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Karl Svennersten
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Petra J de Verdier
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - N Peter Wiklund
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Lars E Gustafsson
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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40
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Rosenberg J, Byrtus M, Stengl M. Original Research: Combined model of bladder detrusor smooth muscle and interstitial cells. Exp Biol Med (Maywood) 2016; 241:1853-64. [PMID: 27328937 DOI: 10.1177/1535370216655402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 05/26/2016] [Indexed: 11/15/2022] Open
Abstract
Although patients with lower urinary tract symptoms constitute a large and still growing population, understanding of bladder detrusor muscle physiology remains limited. Understanding the interactions between the detrusor smooth muscle cells and other bladder cell types (e.g. interstitial cells, IC) that may significantly contribute to coordinating and modulating detrusor contractions represents a considerable challenge. Computer modeling could help to elucidate some properties that are difficult to address experimentally; therefore, we developed in silico models of detrusor smooth muscle cell and interstitial cells, coupled through gap junctions. The models include all of the major ion conductances and transporters described in smooth muscle cell and interstitial cells in the literature. The model of normal detrusor muscle (smooth muscle cell and interstitial cells coupled through gap junctions) completely reproduced the experimental results obtained with detrusor strips in the presence of several pharmacological interventions (ryanodine, caffeine, nimodipine), whereas the model of smooth muscle cell alone (without interstitial cells) failed to reproduce the experimental results. Next, a model of overactive bladder, a highly prevalent clinical condition in both men and women with increasing incidence at older ages, was produced by modifying several processes as reported previously: a reduction of Ca(2+)-release through ryanodine receptors and a reduction of Ca(2+)-dependent K(+)-conductance with augmented gap junctional coupling. This model was also able to reproduce the pharmacological modulation of overactive bladder. In conclusion, a model of bladder detrusor muscle was developed that reproduced experimental results obtained in both normal and overactive bladder preparations. The results indicate that the non-smooth muscle cells of the detrusor (interstitial cells) contribute significantly to the contractile behavior of bladder detrusor muscle and should not be neglected. The model suggests that reduced Ca(2+)-release through ryanodine receptors and Ca(2+)-dependent K(+)-conductance together with augmented gap junctional coupling might play a major role in overactive bladder pathogenesis.
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Affiliation(s)
- Josef Rosenberg
- New Technologies Research Center, University of West Bohemia, Pilsen 30614, Czech Republic
| | - Miroslav Byrtus
- Department of Mechanics, University of West Bohemia, Pilsen 30614, Czech Republic
| | - Milan Stengl
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University in Prague, Pilsen 32300, Czech Republic Biomedical Center, Faculty of Medicine in Pilsen, Charles University in Prague, Pilsen 32300, Czech Republic
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Hart ML, Izeta A, Herrera-Imbroda B, Amend B, Brinchmann JE. Cell Therapy for Stress Urinary Incontinence. TISSUE ENGINEERING PART B-REVIEWS 2015; 21:365-76. [PMID: 25789845 DOI: 10.1089/ten.teb.2014.0627] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Urinary incontinence (UI) is the involuntary loss of urine and is a common condition in middle-aged and elderly women and men. Stress urinary incontinence (SUI) is caused by leakage of urine when coughing, sneezing, laughing, lifting, and exercise, even standing leads to increased intra-abdominal pressure. Other types of UI also exist such as urge incontinence (also called overactive bladder), which is a strong and unexpected sudden urge to urinate, mixed forms of UI that result in symptoms of both urge and stress incontinence, and functional incontinence caused by reduced mobility, cognitive impairment, or neuromuscular limitations that impair mobility or dexterity. However, for many SUI patients, there is significant loss of urethral sphincter muscle due to degeneration of tissue, the strain and trauma of pregnancy and childbirth, or injury acquired during surgery. Hence, for individuals with SUI, a cell-based therapeutic approach to regenerate the sphincter muscle offers the advantage of treating the cause rather than the symptoms. We discuss current clinically relevant cell therapy approaches for regeneration of the external urethral sphincter (striated muscle), internal urethral sphincter (smooth muscle), the neuromuscular synapse, and blood supply. The use of mesenchymal stromal/stem cells is a major step in the right direction, but they may not be enough for regeneration of all components of the urethral sphincter. Inclusion of other cell types or biomaterials may also be necessary to enhance integration and survival of the transplanted cells.
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Affiliation(s)
- Melanie L Hart
- 1 Clinical Research Group KFO 273, Department of Urology, University of Tübingen , Tübingen, Germany
| | - Ander Izeta
- 2 Tissue Engineering Laboratory, Instituto Biodonostia, Hospital Universitario Donostia , San Sebastian, Spain
| | | | - Bastian Amend
- 4 Department of Urology, University of Tübingen , Tuebingen, Germany
| | - Jan E Brinchmann
- 5 Department of Immunology, Oslo University Hospital, Oslo, Norway
- 6 Norwegian Center for Stem Cell Research, Institute of Basic Medical Sciences, University of Oslo , Oslo, Norway
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42
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Ferguson AC, Sutton BW, Boone TB, Ford AP, Munoz A. Inhibition of urothelial P2X3 receptors prevents desensitization of purinergic detrusor contractions in the rat bladder. BJU Int 2015; 116:293-301. [DOI: 10.1111/bju.13003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | | | - Timothy B. Boone
- Houston Methodist Research Institute; Houston TX USA
- Houston Methodist Hospital Department of Urology; Houston TX USA
| | | | - Alvaro Munoz
- Houston Methodist Research Institute; Houston TX USA
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43
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Deng T, Zhang Q, Wang Q, Zhong X, Li L. Changes in hyperpolarization-activated cyclic nucleotide-gated channel expression and activity in bladder interstitial cells of Cajal from rats with detrusor overactivity. Int Urogynecol J 2015; 26:1139-45. [DOI: 10.1007/s00192-015-2632-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 01/14/2015] [Indexed: 10/24/2022]
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44
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Vahabi B, Drake MJ. Physiological and pathophysiological implications of micromotion activity in urinary bladder function. Acta Physiol (Oxf) 2015; 213:360-70. [PMID: 25154454 DOI: 10.1111/apha.12373] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 07/02/2014] [Accepted: 08/19/2014] [Indexed: 12/19/2022]
Abstract
'Micromotions' is a term signifying the presence of localized microcontractions and microelongations, alongside non-motile areas. The motile areas tend to shift over the bladder surface with time, and the intravesical pressure reflects moment-by-moment summation of the interplay between net contractile force generated by micromotions and general bladder tone. Functionally, the bladder structure may comprise modules with variable linkage, which supports presence of localized micromotions (no functional linkage between modules), propagating contractions (where emergence of linkage allows sequential activation) and the shifting of micromotions over time. Detrusor muscle, interstitial cells and intramural innervation have properties potentially relevant for initiating, coordinating and modulating micromotions. Conceptually, such activity could facilitate the generation of afferent activity (filling state reporting) in the absence of intravesical pressure change and the ability to transition to voiding at any bladder volume. This autonomous activity is an intrinsic property, seen in various experimental contexts including the clinical setting of human (female) overactive bladder. 'Disinhibited autonomy' may explain the obvious micromotions in isolated bladders and perhaps contribute clinically in neurological disease causing detrusor overactivity. Furthermore, any process that could increase the initiation or propagation of microcontractions might be anticipated to have a functional effect, increasing the likelihood of urinary urgency and detrusor overactivity respectively. Thus, models of bladder outlet obstruction, neurological trauma and ageing provide a useful framework for detecting cellular changes in smooth muscle, interstitial cells and innervation, and the consequent effects on micromotions.
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Affiliation(s)
- B. Vahabi
- Bristol Urological Institute; North Bristol NHS Trust; Bristol UK
- Department of Biological; Biomedical and Analytical Sciences; University of the West of England; Bristol UK
- School of Clinical Sciences; University of Bristol; Bristol UK
| | - M. J. Drake
- Bristol Urological Institute; North Bristol NHS Trust; Bristol UK
- School of Clinical Sciences; University of Bristol; Bristol UK
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45
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Triguero D, Lafuente-Sanchis A, Garcia-Pascual A. Changes in nerve-mediated contractility of the lower urinary tract in a mouse model of premature ageing. Br J Pharmacol 2014; 171:1687-705. [PMID: 24372152 DOI: 10.1111/bph.12567] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 12/04/2013] [Accepted: 12/12/2013] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND AND PURPOSE A high incidence of lower urinary tract disorders is associated with ageing. In the senescent-accelerated prone (SAMP8) mouse strain and the senescent-accelerated resistant (SAMR1) strain, we compared smooth muscle contractility in responses to intrinsic neurotransmitters, both in the bladder and urethra. EXPERIMENTAL APPROACH We analysed micturition frequency, the changes in muscle tension induced by electrical field stimulation or agonist administration, the density of nerves (adrenergic, cholinergic and nitrergic) and interstitial cells (ICs), as well as cGMP accumulation in bladder and urethral preparations. KEY RESULTS Senescent mice of the SAMP8 strain displayed increased micturition frequency and excitatory contractility of neurogenic origin in the bladder. While cholinergic nerve density remained unchanged, there was a mild sensitization to ACh in male mice. Potentiation in the detrusor may be also provoked by the stronger contribution of ATP, together with reduced adrenergic innervation in males and COX-derived prostanoid production in females. The greater excitatory contractility in the urethra was probably due to the sensitization to noradrenaline, in conjunction with attenuated nitrergic relaxation. There were also fewer neuronal NOS immunoreactive (ir) nerves and vimentin-positive ICs, although the sildenafil- and diethylamine-NONOate-induced relaxations and cGMP-ir remained unchanged. CONCLUSIONS AND IMPLICATIONS Premature senescent mice exhibit bladder and urethral hyperexcitability, coupled with reduced urethral relaxation of neurogenic origin, which could model the impaired urinary function in elderly humans. We propose that senescence-accelerated mice provide a useful tool to analyse the basic mechanisms of age-related changes in bladder and urethral function.
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Affiliation(s)
- D Triguero
- Department of Physiology, Veterinary School, Complutense University, Madrid, Spain
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46
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Ramos-Filho ACS, Shah A, Augusto TM, Barbosa GO, Leiria LO, de Carvalho HF, Antunes E, Grant AD. Menthol inhibits detrusor contractility independently of TRPM8 activation. PLoS One 2014; 9:e111616. [PMID: 25375115 PMCID: PMC4222941 DOI: 10.1371/journal.pone.0111616] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 10/06/2014] [Indexed: 11/19/2022] Open
Abstract
Agonists such as icilin and menthol can activate the cool temperature-sensitive ion channel TRPM8. However, biological responses to menthol may occur independently of TRPM8 activation. In the rodent urinary bladder, menthol facilitates the micturition reflex but inhibits muscarinic contractions of the detrusor smooth muscle. The site(s) of TRPM8 expression in the bladder are controversial. In this study we investigated the regulation of bladder contractility in vitro by menthol. Bladder strips from wild type and TRPM8 knockout male mice (25–30 g) were dissected free and mounted in organ baths. Isometric contractions to carbachol (1 nM–30 µM), CaCl2 (1 µM to 100 mM) and electrical field stimulation (EFS; 8, 16, 32 Hz) were measured. Strips from both groups contracted similarly in response to both carbachol and EFS. Menthol (300 µM) or nifedipine (1 µM) inhibited carbachol and EFS-induced contractions in both wild type and TRPM8 knockout bladder strips. Incubation with the sodium channel blocker tetrodotoxin (1 µM), replacement of extracellular sodium with the impermeant cation N-Methyl-D-Glucamine, incubation with a cocktail of potassium channel inhibitors (100 nM charybdotoxin, 1 µM apamin, 10 µM glibenclamide and 1 µM tetraethylammonium) or removal of the urothelium did not affect the inhibitory actions of menthol. Contraction to CaCl2 was markedly inhibited by either menthol or nifedipine. In cultured bladder smooth muscle cells, menthol or nifedipine abrogated the carbachol or KCl-induced increases in [Ca2+]i. Intravesical administration of menthol increased voiding frequency while decreasing peak voiding pressure. We conclude that menthol inhibits muscarinic bladder contractions through blockade of L-type calcium channels, independently of TRPM8 activation.
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Affiliation(s)
| | - Ajay Shah
- Wolfson Centre for Age-Related Diseases, King's College London, London, United Kingdom
| | - Taize Machado Augusto
- Department of Anatomy, Cellular Biology, Physiology and Biophysics, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Guilherme Oliveira Barbosa
- Department of Anatomy, Cellular Biology, Physiology and Biophysics, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Luiz Osorio Leiria
- Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Hernandes Faustino de Carvalho
- Department of Anatomy, Cellular Biology, Physiology and Biophysics, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Edson Antunes
- Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Andrew Douglas Grant
- Wolfson Centre for Age-Related Diseases, King's College London, London, United Kingdom
- * E-mail:
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Hart ML, Neumayer KMH, Vaegler M, Daum L, Amend B, Sievert KD, Di Giovanni S, Kraushaar U, Guenther E, Stenzl A, Aicher WK. Cell-based therapy for the deficient urinary sphincter. Curr Urol Rep 2014; 14:476-87. [PMID: 23824516 DOI: 10.1007/s11934-013-0352-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
When sterile culture techniques of mammalian cells first became state of the art, there was tremendous anticipation that such cells could be eventually applied for therapeutic purposes. The discovery of adult human stem or progenitor cells further motivated scientists to pursue research in cell-based therapies. Although evidence from animal studies suggests that application of cells yields measurable benefits, in urology and many other disciplines, progenitor-cell-based therapies are not yet routinely clinically available. Stress urinary incontinence (SUI) is a condition affecting a large number of patients. The etiology of SUI includes, but is not limited to, degeneration of the urinary sphincter muscle tissue and loss of innervation, as well as anatomical and biomechanical causes. Therefore, different regimens were developed to treat SUI. However, at present, a curative functional treatment is not at hand. A progenitor-cell-based therapy that can tackle the etiology of incontinence, rather than the consequences, is a promising strategy. Therefore, several research teams have intensified their efforts to develop such a therapy for incontinence. Here, we introduce candidate stem and progenitor cells suitable for SUI treatment, show how the functional homogeneity and state of maturity of differentiated cells crucial for proper tissue integration can be assessed electrophysiologically prior to their clinical application, and discuss the trophic potential of adult mesenchymal stromal (or stem) cells in regeneration of neuronal function.
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Affiliation(s)
- Melanie L Hart
- KFO273, Department of Urology, UKT, University of Tuebingen, Paul-Ehrlich-Str. 15, 72076, Tuebingen, Germany
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Tang HC, Lam WP, Zhang X, Leung PC, Yew DT, Liang W. Chronic ketamine treatment-induced changes in contractility characteristics of the mouse detrusor. Int Urol Nephrol 2014; 46:1563-71. [DOI: 10.1007/s11255-014-0690-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 02/28/2014] [Indexed: 10/25/2022]
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49
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Burnstock G. Purinergic signalling in the urinary tract in health and disease. Purinergic Signal 2014; 10:103-55. [PMID: 24265069 PMCID: PMC3944045 DOI: 10.1007/s11302-013-9395-y] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/24/2013] [Indexed: 12/25/2022] Open
Abstract
Purinergic signalling is involved in a number of physiological and pathophysiological activities in the lower urinary tract. In the bladder of laboratory animals there is parasympathetic excitatory cotransmission with the purinergic and cholinergic components being approximately equal, acting via P2X1 and muscarinic receptors, respectively. Purinergic mechanosensory transduction occurs where ATP, released from urothelial cells during distension of bladder and ureter, acts on P2X3 and P2X2/3 receptors on suburothelial sensory nerves to initiate the voiding reflex, via low threshold fibres, and nociception, via high threshold fibres. In human bladder the purinergic component of parasympathetic cotransmission is less than 3 %, but in pathological conditions, such as interstitial cystitis, obstructed and neuropathic bladder, the purinergic component is increased to 40 %. Other pathological conditions of the bladder have been shown to involve purinoceptor-mediated activities, including multiple sclerosis, ischaemia, diabetes, cancer and bacterial infections. In the ureter, P2X7 receptors have been implicated in inflammation and fibrosis. Purinergic therapeutic strategies are being explored that hopefully will be developed and bring benefit and relief to many patients with urinary tract disorders.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK,
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50
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Malysz J, Afeli SAY, Provence A, Petkov GV. Ethanol-mediated relaxation of guinea pig urinary bladder smooth muscle: involvement of BK and L-type Ca2+ channels. Am J Physiol Cell Physiol 2013; 306:C45-58. [PMID: 24153429 DOI: 10.1152/ajpcell.00047.2013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mechanisms underlying ethanol (EtOH)-induced detrusor smooth muscle (DSM) relaxation and increased urinary bladder capacity remain unknown. We investigated whether the large conductance Ca(2+)-activated K(+) (BK) channels or L-type voltage-dependent Ca(2+) channels (VDCCs), major regulators of DSM excitability and contractility, are targets for EtOH by patch-clamp electrophysiology (conventional and perforated whole cell and excised patch single channel) and isometric tension recordings using guinea pig DSM cells and isolated tissue strips, respectively. EtOH at 0.3% vol/vol (~50 mM) enhanced whole cell BK currents at +30 mV and above, determined by the selective BK channel blocker paxilline. In excised patches recorded at +40 mV and ~300 nM intracellular Ca(2+) concentration ([Ca(2+)]), EtOH (0.1-0.3%) affected single BK channels (mean conductance ~210 pS and blocked by paxilline) by increasing the open channel probability, number of open channel events, and open dwell-time constants. The amplitude of single BK channel currents and unitary conductance were not altered by EtOH. Conversely, at ~10 μM but not ~2 μM intracellular [Ca(2+)], EtOH (0.3%) decreased the single BK channel activity. EtOH (0.3%) affected transient BK currents (TBKCs) by either increasing frequency or decreasing amplitude, depending on the basal level of TBKC frequency. In isolated DSM strips, EtOH (0.1-1%) reduced the amplitude and muscle force of spontaneous phasic contractions. The EtOH-induced DSM relaxation, except at 1%, was attenuated by paxilline. EtOH (1%) inhibited L-type VDCC currents in DSM cells. In summary, we reveal the involvement of BK channels and L-type VDCCs in mediating EtOH-induced urinary bladder relaxation accommodating alcohol-induced diuresis.
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Affiliation(s)
- John Malysz
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, South Carolina
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