1
|
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.
Collapse
|
2
|
Andreev-Andrievskiy AA, Lagereva EA, Pankova NV, Mashkin MA, Manskikh VN, Frolova OY, Fadeeva OV, Telyatnikova EV. Chronic bladder catheterization for precise urine collection in awake mice. J Pharmacol Toxicol Methods 2021; 113:107128. [PMID: 34678429 DOI: 10.1016/j.vascn.2021.107128] [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: 07/12/2021] [Revised: 10/06/2021] [Accepted: 10/11/2021] [Indexed: 11/29/2022]
Abstract
Metabolic chambers are routinely used for urine collection in rodents. In mice, due to small urination volume, evaporation in the metabolic chambers (≈50%) distorts diuresis and urinalysis parameters. We have developed a new technique of bladder catheterization enabling long-term accurate and contamination-free urine collection in awake male and female mice for 30 days or longer. Daily diuresis in catheterized mice was twice higher as compared to metabolic cages. The twofold difference in urine recovery was preserved when the circadian variation of diuresis, the effects of furosemide, desmopressin and water load were estimated using the two techniques. Urine osmolarity, urinalysis, and microbiological parameters evidence higher quality of the catheter-collected urine. Using phenol red, we demonstrate utility of our technique for pharmacokinetic studies. 30 days after the surgery the catheters were patent and had minimal impact on the animals' heath. Bladder catheterization is a useful tool for physiological, pharmacological, and toxicological studies.
Collapse
Affiliation(s)
- Alexander A Andreev-Andrievskiy
- M.V. Lomonosov Moscow State University, Biology Faculty, 119991 Moscow, 1-12 Leninskie Gory, Russia; Institute of biomedical problems, Russian Academy of Science, 123007 Moscow, 76A Khoroshevskoe Shosse, Russia; MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia.
| | - Evgeniya A Lagereva
- Institute of biomedical problems, Russian Academy of Science, 123007 Moscow, 76A Khoroshevskoe Shosse, Russia; MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia
| | - Nadezda V Pankova
- Institute of biomedical problems, Russian Academy of Science, 123007 Moscow, 76A Khoroshevskoe Shosse, Russia; MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia
| | - Mikhail A Mashkin
- Institute of biomedical problems, Russian Academy of Science, 123007 Moscow, 76A Khoroshevskoe Shosse, Russia; MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia
| | - Vasily N Manskikh
- MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia; A.N. Belozerskiy Institute of Physico-Chemical Biology, 119991 Moscow, 1-40 Leninskie Gory, Russia
| | - Olga Yu Frolova
- MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia
| | - Olga V Fadeeva
- MSU Institute for Mitoengineering, LLC, 119991 Moscow, 1-73 Leninskie Gory, Russia
| | | |
Collapse
|
3
|
Fraser MO, Smith PP, Sullivan MP, Bjorling DE, Campeau L, Andersson KE, Yoshiyama M. Best practices for cystometric evaluation of lower urinary tract function in muriform rodents. Neurourol Urodyn 2020; 39:1868-1884. [PMID: 32511810 DOI: 10.1002/nau.24415] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/30/2020] [Accepted: 05/21/2020] [Indexed: 12/21/2022]
Abstract
AIMS Rodent cystometry has provided valuable insights into the impact of the disease, injury, and aging on the cellular and molecular pathways, neurologic processes, and biomechanics of lower urinary tract function. The purpose of this white paper is to highlight the benefits and shortcomings of different experimental methods and strategies and to provide guidance on the proper interpretation of results. METHODS Literature search, selection of articles, and conclusions based on discussions among a panel of workers in the field. RESULTS A range of cystometric tests and techniques used to explore biological phenomena relevant to the lower urinary tract are described, the advantages and disadvantages of various experimental conditions are discussed, and guidance on the practical aspects of experimental execution and proper interpretation of results are provided. CONCLUSIONS Cystometric evaluation of rodents comprises an extensive collection of functional tests that can be performed under a variety of experimental conditions. Decisions regarding which approaches to choose should be determined by the specific questions to be addressed and implementation of the test should follow standardized procedures.
Collapse
Affiliation(s)
- Matthew O Fraser
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina.,Department of Research and Development, Durham Veterans Affairs Medical Center, Durham, North Carolina
| | - Phillip P Smith
- Division of Urology, Department of Surgery, University of Connecticut Medical Center, Farmington, Connecticut
| | - Maryrose P Sullivan
- Division of Urology, Department of Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Department of Research and Development, Veterans Affairs Boston Healthcare System, Boston, Massachusetts
| | - Dale E Bjorling
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Lysanne Campeau
- Division of Urology, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Karl-Erik Andersson
- Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston Salem, North Carolina.,Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Mitsuharu Yoshiyama
- Department of Urology, University of Yamanashi Graduate School of Medicine, Chuo, Yamanashi, Japan
| |
Collapse
|
4
|
Yao J, Li Q, Li X, Qin H, Liang S, Liao X, Chen X, Li W, Yan J. Simultaneous Measurement of Neuronal Activity in the Pontine Micturition Center and Cystometry in Freely Moving Mice. Front Neurosci 2019; 13:663. [PMID: 31293380 PMCID: PMC6603236 DOI: 10.3389/fnins.2019.00663] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 06/11/2019] [Indexed: 01/23/2023] Open
Abstract
Understanding the complex neural mechanisms controlling urinary bladder activity is an extremely important topic in both neuroscience and urology. Simultaneously recording of the bladder activity and neural activity in related brain regions will largely advance this field. However, such recording approach has long been restricted to anesthetized animals, whose bladder function and urodynamic properties are largely affected by anesthetics. In our recent report, we found that it is feasible to record bladder pressure (cystometry) and the related cortical neuron activity simultaneously in freely moving mice. Here, we aimed to demonstrate the use of this combined method in freely moving mice for recording the activity of the pontine micturition center (PMC), a more difficultly approachable small region deeply located in the brainstem and a more popularly studied hub for controlling bladder function. Interestingly, we found that the duration of urination events linearly correlated to the time course of neuronal activity in the PMC. We observed that the activities of PMC neurons highly correlated with spike-like increases in bladder pressure, reflecting bladder contractions. We also found that anesthesia evoked prominent changes in the dynamics of the Ca2+ signals in the PMC during the bladder contraction and even induced the dripping overflow incontinence due to suppression of the neural activity in the PMC. In addition, we described in details both the system for cystometry in freely moving mice and the protocols for how to perform this combined method. Therefore, this work provides a powerful approach that enables the simultaneous measurement of neuronal activity of the PMC or any other brain sites and bladder function in freely behaving mice. This approach offers a promising possibility to examine the neural mechanisms underlying neurogenic bladder dysfunction.
Collapse
Affiliation(s)
- Jiwei Yao
- Department of Urology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Qianwei Li
- Department of Urology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Xianping Li
- Brain Research Center and State Key Laboratory of Trauma, Burns, and Combined Injury, Third Military Medical University, Chongqing, China
| | - Han Qin
- Brain Research Center and State Key Laboratory of Trauma, Burns, and Combined Injury, Third Military Medical University, Chongqing, China
| | - Shanshan Liang
- Brain Research Center and State Key Laboratory of Trauma, Burns, and Combined Injury, Third Military Medical University, Chongqing, China
| | - Xiang Liao
- Brain Research Center and State Key Laboratory of Trauma, Burns, and Combined Injury, Third Military Medical University, Chongqing, China
| | - Xiaowei Chen
- Brain Research Center and State Key Laboratory of Trauma, Burns, and Combined Injury, Third Military Medical University, Chongqing, China
| | - Weibing Li
- Department of Urology, Southwest Hospital, Third Military Medical University, Chongqing, China.,Department of Urology and Nephrology, The Third Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Junan Yan
- Department of Urology, Southwest Hospital, Third Military Medical University, Chongqing, China
| |
Collapse
|