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Shimizu S. Insights into the associative role of hypertension and angiotensin II receptor in lower urinary tract dysfunction. Hypertens Res 2024; 47:987-997. [PMID: 38351189 DOI: 10.1038/s41440-024-01597-8] [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: 10/18/2023] [Revised: 01/05/2024] [Accepted: 01/13/2024] [Indexed: 02/16/2024]
Abstract
In men, the lower urinary tract comprises the urinary bladder, urethra, and prostate, and its primary functions include urine storage and voiding. Hypertension is a condition that causes multi-organ damage and an age-dependent condition. Hypertension and the renin-angiotensin system activation are associated with the development of lower urinary tract dysfunction. Hypertensive animal models show bladder dysfunction, urethral dysfunction, and prostatic hyperplasia. In the renin-angiotensin system, angiotensin II and the angiotensin II type 1 receptor, which are expressed in the lower urinary tract, have been implicated in the pathogenesis of lower urinary tract dysfunction. Moreover, among the several antihypertensives, renin-angiotensin system inhibitors have proven effective in human and animal models of lower urinary tract dysfunction. This review aimed to elucidate the hitherto known mechanisms underlying the development of lower urinary tract dysfunction in relation to hypertension and the angiotensin II/angiotensin II type 1 receptor axis and the effect of renin-angiotensin system inhibitors on lower urinary tract dysfunction. Possible mechanisms through which hypertension or activation of Ang II/AT1 receptor axis causes LUTD such as bladder dysfunction, urethral dysfunction, and prostatic hyperplasia. LUT: lower urinary tract, LUTD: lower urinary tract dysfunction, AT1: angiotensin II type 1, ACE: angiotensin-converting enzyme.
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Affiliation(s)
- Shogo Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Kohasu, Okocho, Nankoku, 783-8505, Japan.
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2
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Kwon J, Kim DY, Cho KJ, Hashimoto M, Matsuoka K, Kamijo T, Wang Z, Karnup S, Robertson AM, Tyagi P, Yoshimura N. Pathophysiology of Overactive Bladder and Pharmacologic Treatments Including β3-Adrenoceptor Agonists -Basic Research Perspectives. Int Neurourol J 2024; 28:12-33. [PMID: 38461853 DOI: 10.5213/inj.2448002.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 01/10/2024] [Indexed: 03/12/2024] Open
Abstract
Overactive bladder (OAB) is a symptom-based syndrome defined by urinary urgency, frequency, and nocturia with or without urge incontinence. The causative pathology is diverse; including bladder outlet obstruction (BOO), bladder ischemia, aging, metabolic syndrome, psychological stress, affective disorder, urinary microbiome, localized and systemic inflammatory responses, etc. Several hypotheses have been suggested as mechanisms of OAB generation; among them, neurogenic, myogenic, and urothelial mechanisms are well-known hypotheses. Also, a series of local signals called autonomous myogenic contraction, micromotion, or afferent noises, which can occur during bladder filling, may be induced by the leak of acetylcholine (ACh) or urothelial release of adenosine triphosphate (ATP). They can be transmitted to the central nervous system through afferent fibers to trigger coordinated urgency-related detrusor contractions. Antimuscarinics, commonly known to induce smooth muscle relaxation by competitive blockage of muscarinic receptors in the parasympathetic postganglionic nerve, have a minimal effect on detrusor contraction within therapeutic doses. In fact, they have a predominant role in preventing signals in the afferent nerve transmission process. β3-adrenergic receptor (AR) agonists inhibit afferent signals by predominant inhibition of mechanosensitive Aδ-fibers in the normal bladder. However, in pathologic conditions such as spinal cord injury, it seems to inhibit capsaicin-sensitive C-fibers. Particularly, mirabegron, a β3-agonist, prevents ACh release in the BOO-induced detrusor overactivity model by parasympathetic prejunctional mechanisms. A recent study also revealed that vibegron may have 2 mechanisms of action: inhibition of ACh from cholinergic efferent nerves in the detrusor and afferent inhibition via urothelial β3-AR.
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Affiliation(s)
- Joonbeom Kwon
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Leaders Urology Clinic, Daegu, Korea
| | - Duk Yoon Kim
- Department of Urology, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Kang Jun Cho
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Department of Urology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Mamoru Hashimoto
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Kanako Matsuoka
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Tadanobu Kamijo
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Zhou Wang
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sergei Karnup
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Anne M Robertson
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh School of Bioengineering, Pittsburgh, PA, USA
| | - Pradeep Tyagi
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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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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Sun Z, Tie Y, Tong X, Cheng M, Wu Y, Xu P, Xue M, Xu L, Zhou X. Multi-omics approaches revealed the therapeutic mechanisms of Suo-Quan-Wan for treating overactive bladder in spontaneously hypertensive rats. JOURNAL OF ETHNOPHARMACOLOGY 2024; 318:117066. [PMID: 37604331 DOI: 10.1016/j.jep.2023.117066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/03/2023] [Accepted: 08/17/2023] [Indexed: 08/23/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Suo-Quan-Wan (SQW), a traditional Chinese prescription, has been used for hundreds of years to alleviate overactive bladder (OAB) symptoms such as frequent and nocturnal urination. However, limited modern research on OAB therapeutic targets has hindered the use and development of SQW. AIM OF THE STUDY This study aimed to investigate the biological mechanisms and key targets of SQW on OAB in spontaneously hypertensive rats (SHR) using an integrated analysis of network pharmacology, transcriptome and metabolome. METHODS Rats were divided into five groups: model group (SHR), control group (WKY), darifenacin group, high dose (SQWH) and low dose (SQWL) group. Urodynamic parameters and histological examination were detected. Network pharmacology, transcriptome, and metabolome were used to screen for disease gene targets, differential mRNA, and differential metabolites, respectively. The biological targets and mechanisms of SQW for OAB were analyzed. Western blotting was performed to verify the proteins of key differential targets. RESULTS Urodynamics revealed a significant decrease in storage parameters in SHR. After SQW treatment, the inter-contraction interval, voided volume and bladder capacity increased by 2-3 times, as well as bladder compliance. Additionally, SQW improved the pathological changes in the urinary tract epithelium and the detrusor layer of the bladder in SHR. Metabolomic results showed an increase in arachidonic acid (AA) and cyclic adenosine monophosphate (cAMP) in plasma, suggesting the involvement of arachidonic acid metabolism and purine metabolism in SQW treatment. The downregulation of cytochrome P450 1B1 (CYP1B1), thromboxane-A synthase (TBXAS1), polyunsaturated fatty acid 5-lipoxygenase (ALOX5), and cAMP-specific 3',5'-cyclic phosphodiesterase 4B (PDE4B) were confirmed through topological analysis and Venn analysis of omics data and network pharmacology. These proteins affected the metabolism of AA and cAMP, respectively, and consequently affected downstream proteins, such as transient receptor potential (TRP) cation channel proteins (e.g. TRPV1, TRPA1, and TRPM8), myosin light chain kinase (MLCK), and the phosphorylation of myosin regulatory light chain (p-MLC). CONCLUSION This study initially elucidated the importance of AA and cAMP in the treatment of SQW, indicating the AA-CYP1B1/TBXAS1/ALOX5-TRPA1/TRPV1/TRPM8 and cAMP-PDE4B-MLCK-p-MLC pathways as the important pathways in SQW-treated SHR bladder in vivo.
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Affiliation(s)
- Zhihui Sun
- Department of Clinical Prescription Pharmacy of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.
| | - Yan Tie
- Department of Clinical Prescription Pharmacy of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.
| | - Xinyi Tong
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Mingchang Cheng
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Yushan Wu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Pingxiang Xu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Ming Xue
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Liping Xu
- Department of Clinical Prescription Pharmacy of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.
| | - Xuelin Zhou
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
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Giannotti A, Musco S, Miragliotta V, Lazzarini G, Pirone A, Briganti A, Verardo C, Bernini F, Del Popolo G, Micera S. Swine Pudendal Nerve as a Model for Neuromodulation Studies to Restore Lower Urinary Tract Dysfunction. Int J Mol Sci 2024; 25:855. [PMID: 38255927 PMCID: PMC10815560 DOI: 10.3390/ijms25020855] [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: 12/21/2023] [Revised: 01/08/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Lower urinary tract dysfunction, such as incontinence or urinary retention, is one of the leading consequences of neurological diseases. This significantly impacts the quality of life for those affected, with implications extending not only to humans but also to clinical veterinary care. Having motor and sensory fibers, the pudendal nerve is an optimal candidate for neuromodulation therapies using bidirectional intraneural prostheses, paving the way towards the restoration of a more physiological urination cycle: bladder state can be detected from recorded neural signals, then an electrical current can be injected to the nerve based on the real-time need of the bladder. To develop such prostheses and investigate this novel approach, animal studies are still required since the morphology of the target nerve is fundamental to optimizing the prosthesis design. This study aims to describe the porcine pudendal nerve as a model for neuromodulation studies aiming at restoring lower urinary tract dysfunction. Five male farm pigs were involved in the study. First, a surgical procedure to access the porcine pudendal nerve without muscle resection was developed. Then, an intraneural interface was implanted to confirm the presence of fibers innervating the external urethral sphincter by measuring its electromyographic activity. Finally, the morphophysiology of the porcine pudendal nerve at the level of surgical exposure was described by using histological and immunohistochemical characterization. This analysis confirmed the fasciculate nature of the nerve and the presence of mixed fibers with a spatial and functional organization. These achievements pave the way for further pudendal neuromodulation studies by using a clinically relevant animal model with the potential for translating the findings into clinical applications.
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Affiliation(s)
- Alice Giannotti
- The BioRobotics Institute and Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, 56127 Pisa, Italy; (A.G.); (C.V.)
| | - Stefania Musco
- Neuro-Urology Department, Careggi University Hospital, 50134 Firenze, Italy; (S.M.); (G.D.P.)
| | - Vincenzo Miragliotta
- Department of Veterinary Sciences, University of Pisa, 56124 Pisa, Italy; (V.M.); (G.L.); (A.P.); (A.B.)
| | - Giulia Lazzarini
- Department of Veterinary Sciences, University of Pisa, 56124 Pisa, Italy; (V.M.); (G.L.); (A.P.); (A.B.)
| | - Andrea Pirone
- Department of Veterinary Sciences, University of Pisa, 56124 Pisa, Italy; (V.M.); (G.L.); (A.P.); (A.B.)
| | - Angela Briganti
- Department of Veterinary Sciences, University of Pisa, 56124 Pisa, Italy; (V.M.); (G.L.); (A.P.); (A.B.)
| | - Claudio Verardo
- The BioRobotics Institute and Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, 56127 Pisa, Italy; (A.G.); (C.V.)
| | - Fabio Bernini
- BioMedLab, Scuola Superiore Sant’Anna, 56127 Pisa, Italy;
| | - Giulio Del Popolo
- Neuro-Urology Department, Careggi University Hospital, 50134 Firenze, Italy; (S.M.); (G.D.P.)
| | - Silvestro Micera
- The BioRobotics Institute and Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, 56127 Pisa, Italy; (A.G.); (C.V.)
- Bertarelli Foundation Chair in Translational NeuroEngineering, Center for Neuroprosthetics and Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
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Doelman AW, Streijger F, Majerus SJA, Damaser MS, Kwon BK. Assessing Neurogenic Lower Urinary Tract Dysfunction after Spinal Cord Injury: Animal Models in Preclinical Neuro-Urology Research. Biomedicines 2023; 11:1539. [PMID: 37371634 DOI: 10.3390/biomedicines11061539] [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: 05/04/2023] [Revised: 05/20/2023] [Accepted: 05/21/2023] [Indexed: 06/29/2023] Open
Abstract
Neurogenic bladder dysfunction is a condition that affects both bladder storage and voiding function and remains one of the leading causes of morbidity after spinal cord injury (SCI). The vast majority of individuals with severe SCI develop neurogenic lower urinary tract dysfunction (NLUTD), with symptoms ranging from neurogenic detrusor overactivity, detrusor sphincter dyssynergia, or sphincter underactivity depending on the location and extent of the spinal lesion. Animal models are critical to our fundamental understanding of lower urinary tract function and its dysfunction after SCI, in addition to providing a platform for the assessment of potential therapies. Given the need to develop and evaluate novel assessment tools, as well as therapeutic approaches in animal models of SCI prior to human translation, urodynamics assessment techniques have been implemented to measure NLUTD function in a variety of animals, including rats, mice, cats, dogs and pigs. In this narrative review, we summarize the literature on the use of animal models for cystometry testing in the assessment of SCI-related NLUTD. We also discuss the advantages and disadvantages of various animal models, and opportunities for future research.
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Affiliation(s)
- Adam W Doelman
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Femke Streijger
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Steve J A Majerus
- Department of Electrical, Computer and Systems Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA
| | - Margot S Damaser
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Brian K Kwon
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
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Berigan BR, Wang J, Schulz DJ, Ozden I. Imaging neuro-urodynamics of mouse major pelvic ganglion with a micro-endoscopic approach. J Neurophysiol 2023; 129:479-493. [PMID: 36651910 DOI: 10.1152/jn.00450.2022] [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: 01/19/2023] Open
Abstract
Postganglionic neurons of the autonomic nervous system lie outside of the central nervous system and innervate specific target effectors such as organs or glands. The major pelvic ganglion (MPG) is one such ganglion that plays a significant role in controlling bladder function in rodents. However, because of technical and physical constraints in recording electrophysiological signals from these neurons in vivo, the functional neural activity in MPG is mostly unknown. Transgenic animal models expressing genetically encoded calcium indicators now provide opportunities to monitor the activity of populations of neurons in vivo to overcome these challenges related to traditional electrophysiological methods. However, like many peripheral neurons, the MPG is not conducive to conventional fluorescent microscopy techniques, as it is located in the pelvic cavity, thus limiting robust optical access by benchtop microscopes. Here, we present an endoscopic approach based on a custom miniscope system (UCLA V3) that allows for effective in vivo monitoring of neural activity in the MPG for the first time. We show that our imaging approach can monitor activity of hundreds of MPG neurons simultaneously during the filling and emptying of the bladder in a urethane-anesthetized transgenic mouse line expressing GCaMP6s in cholinergic MPG neurons. By using custom analysis scripts, we isolated the activity of hundreds of individual neurons and show that populations of neurons have distinct phasic activation patterns during sequential bladder filling and voiding events. Our imaging approach can be adapted to record activity from autonomic neurons across different organs and systems in both healthy and disease models.NEW & NOTEWORTHY The functional activity and information processing within autonomic ganglia is mostly unknown because of technical and physical constraints in recording electrophysiological signals from these neurons in vivo. Here, we use a micro-endoscopic approach to measure in vivo functional activity patterns from a population of autonomic neurons controlling bladder function for the first time. This approach can be adapted to record activity from autonomic neurons across different organs and systems in both healthy and disease models.
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Affiliation(s)
- Benton R Berigan
- Chemical and Biomedical Engineering, University of Missouri, Columbia, Missouri, United States.,Division of Biological Sciences, University of Missouri, Columbia, Missouri, United States
| | - Jing Wang
- Chemical and Biomedical Engineering, University of Missouri, Columbia, Missouri, United States
| | - David J Schulz
- Division of Biological Sciences, University of Missouri, Columbia, Missouri, United States
| | - Ilker Ozden
- Chemical and Biomedical Engineering, University of Missouri, Columbia, Missouri, United States
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Ahmed RU, Knibbe CA, Wilkins F, Sherwood LC, Howland DR, Boakye M. Porcine spinal cord injury model for translational research across multiple functional systems. Exp Neurol 2023; 359:114267. [PMID: 36356636 DOI: 10.1016/j.expneurol.2022.114267] [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: 10/10/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022]
Abstract
Animal models are necessary to identify pathological changes and help assess therapeutic outcomes following spinal cord injury (SCI). Small animal models offer value in research in terms of their easily managed size, minimal maintenance requirements, lower cost, well-characterized genomes, and ability to power research studies. However, despite these benefits, small animal models have neurologic and anatomical differences that may influence translation of results to humans and thus limiting the success of their use in preclinical studies as a direct pipeline to clinical studies. Large animal models, offer an attractive intermediary translation model that may be more successful in translating to the clinic for SCI research. This is largely due to their greater neurologic and anatomical similarities to humans. The physical characteristics of pig spinal cord, gut microbiome, metabolism, proportions of white to grey matter, bowel anatomy and function, and urinary system are strikingly similar and provide great insight into human SCI conditions. In this review, we address the variety of existing porcine injury models and their translational relevance, benefits, and drawbacks in modeling human systems and functions for neurophysiology, cardiovascular, gastrointestinal and urodynamic functions.
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Affiliation(s)
- Rakib Uddin Ahmed
- Department of Neurological Surgery and Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.
| | - Chase A Knibbe
- Department of Neurological Surgery and Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Felicia Wilkins
- Department of Neurological Surgery and Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Leslie C Sherwood
- Comparative Medicine Research Unit, University of Louisville, Louisville, KY, USA
| | - Dena R Howland
- Department of Neurological Surgery and Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA; Robley Rex VA Medical Center, Louisville, KY 40202, USA
| | - Maxwell Boakye
- Department of Neurological Surgery and Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
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Liao Y, Du X, Fu Y, Liu L, Wei J, An Q, Luo X, Gao F, Jia S, Chang Y, Guo M, Liu H. Mechanism of traditional Chinese medicine in treating overactive bladder. Int Urol Nephrol 2023; 55:489-501. [PMID: 36479677 PMCID: PMC9957912 DOI: 10.1007/s11255-022-03434-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Overactive bladder syndrome (OAB) has made increasing progress in mechanism and treatment research. Traditional Chinese medicine (TCM) is a common complementary therapy for OAB, and it has been found to be effective. However, the intervention mechanism of TCM in the treatment of OAB is still unclear. The aim of this review is to consolidate the current knowledge about the mechanism of TCM: acupuncture, moxibustion, herbs in treating OAB, and the animal models of OAB commonly used in TCM. Finally, we put forward the dilemma of TCM treatment of OAB and discussed the insufficiency and future direction of TCM treatment of OAB.
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Affiliation(s)
- Yuxiang Liao
- Acupuncture and Moxibustion Department, Beijing Hospital of Traditional Chinese Medicine, Beijing Key Laboratory of Acupuncture Neuromodulation, Capital Medical University, Beijing, People's Republic of China
| | - Xin Du
- Acupuncture and Moxibustion Department, Beijing Hospital of Traditional Chinese Medicine, Beijing Key Laboratory of Acupuncture Neuromodulation, Capital Medical University, Beijing, People's Republic of China
| | - Yuanbo Fu
- Acupuncture and Moxibustion Department, Beijing Hospital of Traditional Chinese Medicine, Beijing Key Laboratory of Acupuncture Neuromodulation, Capital Medical University, Beijing, People's Republic of China
| | - Lu Liu
- Acupuncture and Moxibustion Department, Beijing Hospital of Traditional Chinese Medicine, Beijing Key Laboratory of Acupuncture Neuromodulation, Capital Medical University, Beijing, People's Republic of China
| | - Jiangyan Wei
- Acupuncture and Moxibustion Department, Beijing Hospital of Traditional Chinese Medicine, Beijing Key Laboratory of Acupuncture Neuromodulation, Capital Medical University, Beijing, People's Republic of China
| | - Qi An
- Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Xuanzhi Luo
- Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Fan Gao
- Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Shuhan Jia
- Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Ying Chang
- Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Mengxi Guo
- Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Huilin Liu
- Acupuncture and Moxibustion Department, Beijing Hospital of Traditional Chinese Medicine, Beijing Key Laboratory of Acupuncture Neuromodulation, Capital Medical University, Beijing, People's Republic of China.
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10
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Functional and Immunofluorescence Evaluations of Vascular and Neural Integrities in Urinary Bladder of Streptozotocin-Induced Diabetic Mice. Int Neurourol J 2022; 26:201-209. [PMID: 36203252 PMCID: PMC9537429 DOI: 10.5213/inj.2244152.076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/29/2022] [Indexed: 12/16/2022] Open
Abstract
Purpose To assess functional and structural changes in vascular and neural structures associated with diabetic bladder dysfunction (DBD) in the bladders of streptozotocin (STZ)-induced diabetic mice. Methods Eight-week-old C57BL/6 mice were injected with STZ at 50 mg/kg daily for 5 consecutive days. Catheters were inserted 12 weeks later, and 5 days after catheter placement bladder functions were assessed by conscious cystometry. Neurovascular and extracellular matrix marker changes in harvested urinary bladders were investigated by immunofluorescent staining. Body weights and fasting and postprandial blood glucose levels were measured 12 weeks after STZ injection. Results STZ-induced diabetic mice had significantly lower body weights and significantly higher blood glucose levels. Assessment of bladder function in STZ-induced diabetic mice revealed a nearly 3-fold increase in bladder capacity and intercontractile interval compared to controls. However, basal pressure, maximal bladder pressure, and threshold pressure were not significantly different. Morphological and structural analysis showed that STZ-induced diabetic mice had significantly reduced microvascular density in lamina propria (33% of the nondiabetic control values), and severely decreased nerve contents in the detrusor region (42% of the nondiabetic control values). Conclusions STZ-induced diabetic mice exhibit functional and structural derangements in urinary bladder. The present study provides a foundation and describes a useful means of evaluating the efficacies of therapeutic targets and exploring the detailed mechanism of DBD.
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Hendawy H, Metwally E, Elfadadny A, Yoshida T, Ma D, Shimada K, Hamabe L, Sasaki K, Tanaka R. Cultured versus freshly isolated adipose-derived stem cells in improvement of the histopathological outcomes in HCL-induced cystitis in a rat model. Biomed Pharmacother 2022; 153:113422. [DOI: 10.1016/j.biopha.2022.113422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/13/2022] [Accepted: 07/14/2022] [Indexed: 11/02/2022] Open
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Review: Correlation between bladder obstruction with bladder function and erectile dysfunction in mice. Ann Med Surg (Lond) 2022; 75:103294. [PMID: 35386771 PMCID: PMC8977939 DOI: 10.1016/j.amsu.2022.103294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 01/06/2022] [Accepted: 01/22/2022] [Indexed: 11/20/2022] Open
Abstract
Bladder obstruction, including due to benign prostate enlargement (BPH), will trigger its anatomy and physiological function changes. Men with BPH have a 6 times higher risk of erectile dysfunction than those without BPH. Morphological and functional changes in subjects with partial bladder outlet obstruction (pBOO) occur differently depending on the duration of pBOO that has been experienced. The underlying pathophysiology of BPH is closely related to erectile dysfunction. Anatomically, functionally, and psychologically changes due to BPH will also have an impact on sexual function. Chronic pBOO causes lower urinary tract symptoms (LUTS) through a complex pathophysiological pathway. LUTS and bladder obstruction can lead to erectile dysfunction. The severity of LUTS and sexual dysfunction is inversely related to the quality of life. The treatment of LUTS symptoms will also enhance sexual function. Bladder morphology and functional changes are depending on the partial bladder outlet obstruction (pBOO) duration that is experienced and also have an impact on sexual function. Ischemia leads to increased production of reactive oxygen species (ROS), malondialdehyde (MDA). Free radicals from ischemia-reperfusion injury are one of the major causes of bladder obstruction. Obstruction of the bladder neck nerve may be associated with impaired sensory axons. PBOO play a modulating role alongside key mechanisms such as vascular changes, altered CCSM tone/contractility, phosphodiesterase-dependent pathway. Chronic pBOO are increased risk of infection through complex pathophysiological pathway involving nitric oxide guanosine monophosphate and RhoA/Rho-kinase, metabolic syndrome, autonomic hyperactivity, pelvic ischemia, psychological factors, imbalance of sex hormones, and inflammatory pathways.
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