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Wishahi M, Hassan S, Kamal N, Badawy M, Hafiz E. Is bladder outlet obstruction rat model to induce overactive bladder (OAB) has similarity to human OAB? Research on the events in smooth muscle, collagen, interstitial cell and telocyte distribution. BMC Res Notes 2024; 17:22. [PMID: 38212840 PMCID: PMC10785408 DOI: 10.1186/s13104-023-06681-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 12/28/2023] [Indexed: 01/13/2024] Open
Abstract
BACKGROUND Cellular and cytoskeletal events of overactive bladder (OAB) have not been sufficiently explored in human bladder due to different limitations. Bladder outlet obstruction (BOO) had been induced in different animal models with different methods to induce (OAB). Similarity of the animal models of BOO to the human OAB is postulated but has not been confirmed. The interstitial cells of Cajal (ICCs), and telocytes (TCs) are an important players in smooth muscles conductivity, they had not been well investigated in the previous BOO models. Objectives are to investigate the morphological pattern of cellular, cytoskeleton and telocytes distribution in BOO rat model and to match the events in two time periods and compare it to the findings in real-world human OAB. METHODS Female Sprague-Dawley rats (Rattus norvegicus) were randomly divided into: sham (n = 10), BOO 6 W (n = 10), BOO 8 W (n = 10). Operative procedure to Induce BOO was done under anesthesia with intraperitoneal Ketamine administration. The Effect of induction of BOO was evaluated after 6 and 8 weeks. The rats were anesthetized, and the urinary bladder was removed, while the rat was unconscious under anaesthesia it was transferred to the inhalation anaesthesia cage for euthanasia, rats were sacrificed under light anesthesia using isoflurane. Care of animals, surgical procedure, and euthanasia adhered to Guide for the Care and Use of Laboratory Animals, and AVMA Guidelines for the Euthanasia of Animals. The retrieved bladder was processed for examination with histopathology, immunohistochemistry (IHC), and transmission electron microscopy (EM). RESULTS Histological examination of the bladder shows thinner urothelium, condensation of collagen between muscle bundles. IHC with c-kit shows the excess distribution of ICCs between smooth muscle bundles. EM shows frequent distribution of TCs that were situated between collagen fibers. Finings in BOO 6 W group and BOO 8 W group were comparable. CONCLUSION The animal model study demonstrated increased collagen/ smooth muscle ratio, high intensity of ICCs and presence of TCs. Findings show that a minimally invasive procedure to induce BOO in rats had resulted in an OAB that has morphological changes that were stable in 6 & 8 weeks. We demonstrated the distribution of TCs and ICCs in the rat animal model and defined them. The population of TCs in the BOO rat model is described for the first time, suggests that the TCs and ICCs may contribute to the pathophysiology of OAB. Similarity of animal model to human events OAB was demonstrated. These findings warrant further study to define the role of TCs in OAB. CLINICAL TRIAL REGISTRY The study does not require a clinical trial registration; it is an experimental animal study in basic science and does not include human subjects.
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Affiliation(s)
- Mohamed Wishahi
- Department of Urology, Theodor Bilharz Research Institute, P.O. 30, Warrak El-Hadar, Cairo, Imbaba, Giza, 12411, Egypt.
| | - Sarah Hassan
- Department of Pathology and Electron microscopy, Theodor Bilharz Research Institute, Cairo, Egypt
| | - Nabawya Kamal
- Department of Anesthesia, Theodor Bilharz Research Institute, Cairo, Egypt
| | - Mohamed Badawy
- Department of Urology, Theodor Bilharz Research Institute, P.O. 30, Warrak El-Hadar, Cairo, Imbaba, Giza, 12411, Egypt
| | - Ehab Hafiz
- Department of Pathology and Electron microscopy, Theodor Bilharz Research Institute, Cairo, Egypt
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Huang J, Li H, Zhang Y, Liu J, Cao H, Long Y. Excitatory purinergic and cholinergic expression changed in a partial bladder outlet obstruction-induced overactive bladder rat model. Sci Rep 2023; 13:18395. [PMID: 37884550 PMCID: PMC10603080 DOI: 10.1038/s41598-023-45014-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 10/14/2023] [Indexed: 10/28/2023] Open
Abstract
Overactive bladder (OAB) is a common, long-term symptom complex with a high prevalence in women worldwide. OAB has caused a social burden, and effective treatments are urgently needed. However, the pathogenesis of OAB has yet to be elucidated. Model rats underwent bladder outlet obstruction surgery. In the 2nd, 3rd, and 4th weeks after surgery, metabolic cages were used to detect the 12 h urine volume of rats in the sham and model groups. The urodynamic parameters bladder leak point pressure (BPLL), maximum voiding pressure (MVP), residual volume (RV), maximum bladder capacity (MBC), bladder compliance (BC), voided efficiency (VE), and non-voiding contractions (NVCs) were also detected. Moreover, the contractile responses of isolated detrusor muscles to electrical and carbachol stimulation were examined at the abovementioned time points. At the 4th week after surgery, the bladders of both groups were obtained for hematoxylin-eosin (H&E) and Masson's trichrome staining. Real-time qPCR and Western blot were performed to quantify the expression of choline acetyltransferase (ChAT) and solute carrier family 17 member 9 (SLC17A9). At week 4, compared with the sham group, the 12 h urine volume of PBOO group increased significantly. The BLPP, MVP, VE, MBC, and NVCs increased significantly, and the VE was significantly reduced in 4-week PBOO group. The contractile responses of isolated detrusor muscles to electrical and carbachol stimulation significantly increased in 4-week PBOO group. In the 4-week PBOO group, the bladder wall and the ratio of bladder muscle to collagen within the bladder smooth muscle layer wall were significantly higher than those in the sham group. ChAT and SLC17A9 mRNA and protein expression in the OAB model rats significantly increased. At 4 weeks after PBOO, the OAB model was successfully established. The gene and protein expression levels of ChAT and SLC17A9 increased in the bladder of the OAB model, suggesting that OAB may be related to increased excitatory purinergic and cholinergic expression.
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Affiliation(s)
- Jingyi Huang
- Guangzhou University of Chinese Medicine, No.232 Outer Ring East Road, Higher Education Mega Center, Guangzhou, Guangdong, China
| | - Hongliang Li
- Guangzhou University of Chinese Medicine, No.232 Outer Ring East Road, Higher Education Mega Center, Guangzhou, Guangdong, China
| | - Yao Zhang
- Guangzhou University of Chinese Medicine, No.232 Outer Ring East Road, Higher Education Mega Center, Guangzhou, Guangdong, China
| | - Jiaye Liu
- Guangzhou University of Chinese Medicine, No.232 Outer Ring East Road, Higher Education Mega Center, Guangzhou, Guangdong, China
| | - Hongying Cao
- Guangzhou University of Chinese Medicine, No.232 Outer Ring East Road, Higher Education Mega Center, Guangzhou, Guangdong, China.
| | - Yongling Long
- Guangzhou University of Chinese Medicine, No.232 Outer Ring East Road, Higher Education Mega Center, Guangzhou, Guangdong, China.
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王 钊, 张 朝, 金 黎, 刘 博, 沈 炼, 何 大, 魏 光. [Establishment of an Animal Model of Vesicoureteral Reflux Renal Injury through Partial Bladder Outlet Obstruction]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2021; 52:825-831. [PMID: 34622600 PMCID: PMC10408891 DOI: 10.12182/20210960502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To establish an animal model of reflux renal damage through bladder outlet obstruction. METHODS Sixty male C57BL/6 mice aged 6-8 weeks were randomly assigned to a control group, a sham operation group, and a partial bladder outlet obstruction (PBOO) group, with 20 mice in each group. Laparotomy were performed on the PBOO mice under anesthesia in order to separate the bladder necks and to perform guided partial ligation of the bladder neck with a metal rod of 0.3 mm diameter. Mice in the sham operation group had laparotomy and had their bladder necks separated without ligation. The control group did not receive any treatment. 7 days after the surgery, 12 surviving mice were randomly selected from each group to observe the general changes of the bladder, ureter, renal pelvis and kidney. Retrograde urography was performed through the bladder. Kidney tissues were extracted for histopathological analysis. The expression levels of Vimentin, proliferating cell nuclear antigen (PCNA) and α-smooth muscle actin (α-SMA) were examined with Western blot, immunohistochemistry and immunofluorescence staining tests, respectively. RESULTS Compared with the control and sham operation group, the bladder, ureter, and renal pelvis of the mice in the PBOO group were significantly enlarged, vesicoureteral reflux was more obvious, the kidney volume and mass increased ( P<0.001), and renal parenchyma became thinner ( P<0.000 1). Histopathological staining showed glomerular atrophy, renal tubule expansion, tubulointerstitial inflammatory cell infiltration, glomerular basement membrane hyperplasia and obvious interstitial fibrosis. Western blot, immunofluorescence and immunohistochemistry staining showed that the expression levels of Vimentin, PCNA and α-SMA in kidney tissue were elevated ( P<0.000 1). CONCLUSION After PBOO, the bladder, ureter, and kidney of the mice showed obvious morphological alteration and presented reflux renal fibrosis-like damage. This can be used as an animal model to study the pathological alteration mechanism and therapeutic measures of renal fibrosis caused by bladder outlet obstruction.
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Affiliation(s)
- 钊颖 王
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - 朝霞 张
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - 黎明 金
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - 博 刘
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - 炼桔 沈
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - 大维 何
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
- 重庆医科大学附属儿童医院 泌尿外科 (重庆 400014)Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - 光辉 魏
- 重庆医科大学附属儿童医院 儿童泌尿生殖发育与组织工程重点实验室 儿童发育疾病研究教育部重点实验室 国家儿童健康与疾病临床医学研究中心 儿童发育重大疾病国家国际科技合作基地 儿科学重庆市重点实验室 (重庆 400014)Key Laboratory of Children Urogenital Development and Tissue Engineering, Key Laboratory of Children's Development and Disorders of the Ministry of Education, National Clinical Research Center for Children's Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
- 重庆医科大学附属儿童医院 泌尿外科 (重庆 400014)Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
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Chen L, Yang Y, Yang J, He P, Amend B, Stenzl A, Hu J, Zhang Y, Wang Z. Suture causing urethral meatus stricture: A novel animal model of partial bladder outlet obstruction. Neurourol Urodyn 2018; 37:2088-2096. [PMID: 29953650 DOI: 10.1002/nau.23427] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/15/2017] [Indexed: 11/08/2022]
Abstract
AIMS Open surgery is the most commonly used methodological approach for generating a partial bladder outlet obstruction (pBOO) animal model. Surgical suturing closing a part of the urethral meatus induces comparable pathophysiological changes in bladder and renal functions, but the optimum degree of obstruction that closely mimics the clinical pathology of pBOO has not been elucidated. We investigated the optimum obstruction level by performing a comprehensive time-dependent analysis of the stability and reliability of this novel animal model. METHODS Six- to eight-week-old female BALB/c mice were divided into three groups according to the degree of urethral meatus stricture (UMS). Non-operated mice served as controls, and a pBOO model generated using the traditional method served as a positive control. A cystometric evaluation and long-term studies were performed to evaluate the validity and reliability of this novel animal model. An additional 35 mice were used to investigate the protein expression levels and histopathological features 24 h and 14 days postoperatively, respectively. RESULTS The characteristic cystometry features in the UMS group revealed increased changes in pressure-related parameters compared with the control. The 1/3 UMS model is an optional pBOO animal model because the cystometric evaluation and histopathological studies revealed a striking resemblance between the 1/3 UMS model and the model generated using the traditional open-surgery method. CONCLUSIONS The minimally invasive UMS model required less time and produced minimal alterations in pathophysiologically relevant processes compared with the traditional surgery model. Suturing to cause UMS produced effective and repeatable patterns in bladder function investigations in mice.
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Affiliation(s)
- Lin Chen
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Yafei Yang
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China.,Zunyi Medical University, Zunyi, China
| | - Jin Yang
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China.,Zunyi Medical University, Zunyi, China
| | - Pinglin He
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Bastian Amend
- Department of Urology, University of Tübingen, Tübingen, Germany
| | - Arnulf Stenzl
- Department of Urology, University of Tübingen, Tübingen, Germany
| | - Jianyun Hu
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Yamei Zhang
- Central Laboratory, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Zili Wang
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
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Sidler M, Aitken K, Jiang J, Bijos D, Belik J, Bägli DJ. Finding NeMO—Nerve-sparing Mid-urethral Obstruction: A Pathophysiologically Accurate Model of Rodent Partial Bladder Outlet Obstruction. Urology 2017; 105:208.e1-208.e9. [DOI: 10.1016/j.urology.2017.03.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 01/25/2017] [Accepted: 03/23/2017] [Indexed: 11/25/2022]
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Chen L, Yang J, Hu HF, Wang ZL. Re: Preventive Effect of Hydrogen Water on the Development of Detrusor Overactivity in a Rat Model of Bladder Outlet Obstruction: N. Miyazaki, O. Yamaguchi, M. Nomiya, K. Aikawa and J. Kimura J Urol 2016;195:780-787. J Urol 2016; 196:620-1. [PMID: 27154566 DOI: 10.1016/j.juro.2016.03.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2016] [Indexed: 10/21/2022]
Affiliation(s)
- Lin Chen
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China.
| | - Jin Yang
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Hai-Feng Hu
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Zi-Li Wang
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, China
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