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Senger JL, Power H, Moore AM. Electrical Stimulation: How It Works and How to Apply It. Hand Clin 2024; 40:409-420. [PMID: 38972685 DOI: 10.1016/j.hcl.2024.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
Electrical stimulation is emerging as a perioperative strategy to improve peripheral nerve regeneration and enhance functional recovery. Despite decades of research, new insights into the complex multifaceted mechanisms of electrical stimulation continue to emerge, providing greater understanding of the neurophysiology of nerve regeneration. In this study, we summarize what is known about how electrical stimulation modulates the molecular cascades and cellular responses innate to nerve injury and repair, and the consequential effects on axonal growth and plasticity. Further, we discuss how electrical stimulation is delivered in preclinical and clinical studies and identify knowledge gaps that may provide opportunities for optimization.
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Affiliation(s)
- Jenna-Lynn Senger
- Division of Plastic Surgery, University of British Columbia, Suite 1788, 1111 W Georgia Street, Vancouver, British Columbia, V6E 4M3, Canada
| | - Hollie Power
- Division of Plastic Surgery, Department of Surgery, University of Alberta, Suite 401, 316 Windermere Road NorthWest, Edmonton, Alberta T6W 2Z8, Canada
| | - Amy M Moore
- Department of Plastic and Reconstructive Surgery, The Ohio State University, 915 Olentangy River Road Suite 2100, Columbus, OH 43212, USA.
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2
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Chu XL, Song XZ, Li Q, Li YR, He F, Gu XS, Ming D. Basic mechanisms of peripheral nerve injury and treatment via electrical stimulation. Neural Regen Res 2022; 17:2185-2193. [PMID: 35259827 PMCID: PMC9083151 DOI: 10.4103/1673-5374.335823] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Previous studies on the mechanisms of peripheral nerve injury (PNI) have mainly focused on the pathophysiological changes within a single injury site. However, recent studies have indicated that within the central nervous system, PNI can lead to changes in both injury sites and target organs at the cellular and molecular levels. Therefore, the basic mechanisms of PNI have not been comprehensively understood. Although electrical stimulation was found to promote axonal regeneration and functional rehabilitation after PNI, as well as to alleviate neuropathic pain, the specific mechanisms of successful PNI treatment are unclear. We summarize and discuss the basic mechanisms of PNI and of treatment via electrical stimulation. After PNI, activity in the central nervous system (spinal cord) is altered, which can limit regeneration of the damaged nerve. For example, cell apoptosis and synaptic stripping in the anterior horn of the spinal cord can reduce the speed of nerve regeneration. The pathological changes in the posterior horn of the spinal cord can modulate sensory abnormalities after PNI. This can be observed in cases of ectopic discharge of the dorsal root ganglion leading to increased pain signal transmission. The injured site of the peripheral nerve is also an important factor affecting post-PNI repair. After PNI, the proximal end of the injured site sends out axial buds to innervate both the skin and muscle at the injury site. A slow speed of axon regeneration leads to low nerve regeneration. Therefore, it can take a long time for the proximal nerve to reinnervate the skin and muscle at the injured site. From the perspective of target organs, long-term denervation can cause atrophy of the corresponding skeletal muscle, which leads to abnormal sensory perception and hyperalgesia, and finally, the loss of target organ function. The mechanisms underlying the use of electrical stimulation to treat PNI include the inhibition of synaptic stripping, addressing the excessive excitability of the dorsal root ganglion, alleviating neuropathic pain, improving neurological function, and accelerating nerve regeneration. Electrical stimulation of target organs can reduce the atrophy of denervated skeletal muscle and promote the recovery of sensory function. Findings from the included studies confirm that after PNI, a series of physiological and pathological changes occur in the spinal cord, injury site, and target organs, leading to dysfunction. Electrical stimulation may address the pathophysiological changes mentioned above, thus promoting nerve regeneration and ameliorating dysfunction.
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Affiliation(s)
- Xiao-Lei Chu
- Academy of Medical Engineering and Translational Medicine, Tianjin University; Department of Rehabilitation, Tianjin Hospital, Tianjin, China
| | - Xi-Zi Song
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
| | - Qi Li
- Academy of Medical Engineering and Translational Medicine, Tianjin University; Department of Rehabilitation, Tianjin Hospital, Tianjin, China
| | - Yu-Ru Li
- College of Exercise & Health Sciences, Tianjin University of Sport, Tianjin, China
| | - Feng He
- College of Precision Instruments & Optoelectronics Engineering, Tianjin University, Tianjin, China
| | - Xiao-Song Gu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
| | - Dong Ming
- Academy of Medical Engineering and Translational Medicine; College of Precision Instruments & Optoelectronics Engineering, Tianjin University, Tianjin, China
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3
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Yuan X, Balog BM, Lin DL, Hanzlicek B, Kuang M, Yan H, Majerus SJA, Damaser MS. Brain-Derived Neurotrophic Factor Is an Important Therapeutic Factor in Mesenchymal Stem Cell Secretions for Treatment of Traumatic Peripheral Pelvic Injuries. Front Cell Neurosci 2022; 16:866094. [PMID: 35663428 PMCID: PMC9157419 DOI: 10.3389/fncel.2022.866094] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 04/12/2022] [Indexed: 11/18/2022] Open
Abstract
Traumatic neuromuscular injury to the pudendal nerve and urethra during childbirth does not regenerate well and contributes to stress urinary incontinence in women. Mesenchymal stem cells (MSCs) can improve neuroregeneration via their secretions, or secretome, which includes brain-derived neurotrophic factor (BDNF). In this study, we investigated whether BDNF is a key factor in the secretome of MSCs for the facilitation of functional recovery following a dual simulated childbirth injury. BDNF knockdown (KD) MSCs were created using an anti-BDNF shRNA lentivirus vector. A scrambled sequence was used as a transduction control (scrambled). Cells were cultured for 24 h before media was concentrated 50x to create concentrated conditioned media (CCM) containing MSC secretome. CCM of unmanipulated MSCs was screened for high BDNF expression (high BDNF CCM). Concentrated control media (CM) was created by concentrating media not conditioned by cells. Female Sprague-Dawley rats underwent bilateral pudendal nerve crush and vaginal distension (Injury) or sham injury. One hour and 1 week after injury, sham injured rats received CM, and injured rats received CM, high BDNF CCM, KD CCM, or scrambled CCM (300 μl intraperitoneally). Three weeks after injury, rats underwent leak point pressure (LPP) and pudendal nerve sensory branch potential (PNSBP) recordings. The urethra and pudendal nerve were harvested for anatomical assessment. ANOVA followed by the Student-Newman-Keuls test determined significant differences between groups (p < 0.05). BDNF KD CCM had significantly decreased BDNF concentration compared to scrambled CCM, while the concentration in high BDNF CCM was significantly increased. LPP was significantly decreased in CM and KD CCM treated animals compared to sham injury, but not with scrambled or high BDNF CCM. PNSBP firing rate showed a significant decrease with CM treatment compared to sham injury. Neuromuscular junctions in the urethral sphincter in KD CCM, scrambled CCM, and high BDNF CCM were healthier than CM treated rats. While anatomical and nerve function tests demonstrate regeneration of the pudendal nerve with any CCM treatment, LPP results suggest it takes longer to recover continence with reduced BDNF in CCM. BDNF in MSC CCM is an important factor for the acceleration of recovery from a dual nerve and muscle injury.
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Affiliation(s)
- Xiaoyi Yuan
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, United States
- Department of Urology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Brian M. Balog
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, United States
- Department of Biology, University of Akron, Akron, OH, United States
| | - Dan Li Lin
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Brett Hanzlicek
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Mei Kuang
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Hao Yan
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
- Department of Urology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Steve J. A. Majerus
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Margot S. Damaser
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, United States
- Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, United States
- *Correspondence: Margot S. Damaser
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Post WM, Widomska J, Grens H, Coenen MJH, Martens FMJ, Janssen DAW, IntHout J, Poelmans G, Oosterwijk E, Kluivers KB. Molecular Processes in Stress Urinary Incontinence: A Systematic Review of Human and Animal Studies. Int J Mol Sci 2022; 23:ijms23063401. [PMID: 35328824 PMCID: PMC8949972 DOI: 10.3390/ijms23063401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/10/2022] [Accepted: 03/18/2022] [Indexed: 02/01/2023] Open
Abstract
Stress urinary incontinence (SUI) is a common and burdensome condition. Because of the large knowledge gap around the molecular processes involved in its pathophysiology, the aim of this review was to provide a systematic overview of genetic variants, gene and protein expression changes related to SUI in human and animal studies. On 5 January 2021, a systematic search was performed in Pubmed, Embase, Web of Science, and the Cochrane library. The screening process and quality assessment were performed in duplicate, using predefined inclusion criteria and different quality assessment tools for human and animal studies respectively. The extracted data were grouped in themes per outcome measure, according to their functions in cellular processes, and synthesized in a narrative review. Finally, 107 studies were included, of which 35 used animal models (rats and mice). Resulting from the most examined processes, the evidence suggests that SUI is associated with altered extracellular matrix metabolism, estrogen receptors, oxidative stress, apoptosis, inflammation, neurodegenerative processes, and muscle cell differentiation and contractility. Due to heterogeneity in the studies (e.g., in examined tissues), the precise contribution of the associated genes and proteins in relation to SUI pathophysiology remained unclear. Future research should focus on possible contributors to these alterations.
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Affiliation(s)
- Wilke M. Post
- Department of Obstetrics and Gynecology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (W.M.P.); (H.G.)
| | - Joanna Widomska
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (J.W.); (G.P.)
| | - Hilde Grens
- Department of Obstetrics and Gynecology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (W.M.P.); (H.G.)
| | - Marieke J. H. Coenen
- Radboud Institute of Health Sciences, Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands;
| | - Frank M. J. Martens
- Department of Urology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (F.M.J.M.); (D.A.W.J.); (E.O.)
| | - Dick A. W. Janssen
- Department of Urology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (F.M.J.M.); (D.A.W.J.); (E.O.)
| | - Joanna IntHout
- Department of Health Evidence, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands;
| | - Geert Poelmans
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (J.W.); (G.P.)
| | - Egbert Oosterwijk
- Department of Urology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (F.M.J.M.); (D.A.W.J.); (E.O.)
| | - Kirsten B. Kluivers
- Department of Obstetrics and Gynecology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (W.M.P.); (H.G.)
- Correspondence:
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5
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Gill BC. EDITORIAL COMMENT. Urology 2022; 160:174-175. [PMID: 35216697 DOI: 10.1016/j.urology.2021.04.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bradley C Gill
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Lerner College of Medicine, Education Institute, Cleveland Clinic
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6
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Li C, Qu Z, Liu J, Ruan S, Chen B, Ran J, Shu W, Chen Y, Hou W. Effect of electroacupuncture on the intestinal microflora in rats with stress urinary incontinence. Front Endocrinol (Lausanne) 2022; 13:860100. [PMID: 35992152 PMCID: PMC9390059 DOI: 10.3389/fendo.2022.860100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To examine the effect of electroacupuncture on the urodynamics and gut microbiota of rats with stress urinary incontinence (SUI). MATERIALS AND METHODS Thirty 2-month-old female Sprague-Dawley (SD) rats were randomly assigned to 4 groups: normal (N), model (M), nonacupoint electric acupuncture control (NAAC), and electroacupuncture (EA). An SUI rat model was established through vaginal balloon dilatation and bilateral oophorectomy. After various treatments, urodynamic tests were performed, and feces were collected. 16S rRNA sequencing analysis was used to investigate SUI-related changes in the intestinal flora. RESULTS After treatment, compared with those of the M group, the leak point pressure and maximum bladder capacity of the electroacupuncture groups increased (P<0.05). The species community compositions of the N and M groups differed at the genus level, and there were 15 differentially abundant bacterial genera (P<0.05). The Blautia proportion was increased by electroacupuncture treatment (P<0.05) and was significantly positively correlated with the electroacupuncture treatment of SUI (according to Spearman correlation analysis). CONCLUSION Electroacupuncture treatment can improve signs of urine leakage in rats with SUI rats by increasing the leak point pressure and maximum bladder capacity. The enrichment of Blautia by electroacupuncture treatment enrichment may be related to SUI sign improvement.
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Affiliation(s)
| | | | | | | | | | | | | | - Yuelai Chen
- *Correspondence: Wenguang Hou, ; Yuelai Chen,
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7
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Time course for urethral neuromuscular reestablishment and its facilitated recovery by transcutaneous neuromodulation after simulated birth trauma in rats. Sci Rep 2021; 11:21591. [PMID: 34732833 PMCID: PMC8566552 DOI: 10.1038/s41598-021-01200-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/25/2021] [Indexed: 11/08/2022] Open
Abstract
The aims of the study were to determine the time-course of urinary incontinence recovery after vaginal distension (VD), elucidate the mechanisms of injury from VD leading to external urethral sphincter (EUS) dysfunction, and assess if transcutaneous electrical stimulation (TENS) of the dorsal nerve of the clitoris facilitates recovery of urinary continence after VD. Rats underwent 4-h VD, 4-h sham VD (SH-VD), VD plus 1-h DNC TENS, and VD plus 1-h sham TENS (SH-TENS). TENS or SH-TENS were applied immediately and at days 2 and 4 post-VD. Micturition behavior, urethral histochemistry and histology, EUS and nerve electrophysiology, and cystometrograms were evaluated. VD induced urine leakage and significantly disrupted EUS fibers and nerve-conduction (VD vs SH-VD group;p < 0.01). Urine leakage disappeared 13 days post-VD (p < 0.001). Structural and functional recovery of EUS neuromuscular circuitry started by day 6 post-VD, but did not fully recover by day 11 post-VD (p > 0.05). TENS significantly decreased the frequency of urine leakage post-VD (days 5–7;p < 0.01). We conclude that rat urinary continence after VD requires 2 weeks to recover, although urethra structure is not fully recovered. TENS facilitated urinary continence recovery after VD. Additional studies are necessary to assess if TENS could be used in postpartum women.
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Garcia-Sandoval A, Guerrero E, Hosseini SM, Rocha-Flores PE, Rihani R, Black BJ, Pal A, Carmel JB, Pancrazio JJ, Voit WE. Stable softening bioelectronics: A paradigm for chronically viable ester-free neural interfaces such as spinal cord stimulation implants. Biomaterials 2021; 277:121073. [PMID: 34419732 PMCID: PMC8642083 DOI: 10.1016/j.biomaterials.2021.121073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 07/25/2021] [Accepted: 08/15/2021] [Indexed: 01/01/2023]
Abstract
Polymer toughness is preserved at chronic timepoints in a new class of modulus-changing bioelectronics, which hold promise for commercial chronic implant components such as spinal cord stimulation leads. The underlying ester-free chemical network of the polymer substrate enables device rigidity during implantation, soft, compliant, conforming structures during acute phases in vivo, and gradual stabilization of materials properties chronically, maintaining materials toughness as device stiffness changes. In the past, bioelectronics device designs generally avoided modulus-changing and materials due to the difficulty in demonstrating consistent, predictable performance over time in the body. Here, the acute, and chronic mechanical and chemical properties of a new class of ester-free bioelectronic substrates are described and characterized via accelerated aging at elevated temperatures, with an assessment of their underlying cytotoxicity. Furthermore, spinal cord stimulation leads consisting of photolithographically-defined gold traces and titanium nitride (TiN) electrodes are fabricated on ester-free polymer substrates. Electrochemical properties of the fabricated devices are determined in vitro before implantation in the cervical spinal cord of rat models and subsequent quantification of device stimulation capabilities. Preliminary in vivo evidence demonstrates that this new generation of ester-free, softening bioelectronics holds promise to realize stable, scalable, chronically viable components for bioelectronic medicines of the future.
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Affiliation(s)
- Aldo Garcia-Sandoval
- Department of Bioengineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA.
| | - Edgar Guerrero
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Seyed Mahmoud Hosseini
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Pedro E Rocha-Flores
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Rashed Rihani
- Department of Bioengineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Bryan J Black
- Department of Bioengineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Ajay Pal
- Department of Neurology and Orthopedics, Columbia University, 650 W. 168th St, New York, NY, 10032, USA
| | - Jason B Carmel
- Department of Neurology and Orthopedics, Columbia University, 650 W. 168th St, New York, NY, 10032, USA
| | - Joseph J Pancrazio
- Department of Bioengineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Walter E Voit
- Department of Bioengineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA; Department of Mechanical Engineering, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA; Center for Engineering Innovation, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA.
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Spinelli A, Laurenti V, Carrano FM, Gonzalez-Díaz E, Borycka-Kiciak K. Diagnosis and Treatment of Obstetric Anal Sphincter Injuries: New Evidence and Perspectives. J Clin Med 2021; 10:3261. [PMID: 34362045 PMCID: PMC8347477 DOI: 10.3390/jcm10153261] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 12/15/2022] Open
Abstract
Perineal injury during childbirth is a common event with important morbidity associated in particular with third-and-fourth degree perineal tears (also referred to as obstetric anal sphincter injuries-OASIS). Early diagnosis of these damages is mandatory to define a prompt therapeutic strategy and thus avoid the development of late-onset consequences, such as faecal incontinence. For this purpose, various diagnostic exams can be performed after a thorough clinical examination. The management of OASIS includes several measures and should be individualized according to the timing and features of the clinical presentation.
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Affiliation(s)
- Antonino Spinelli
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Milan, Italy; (V.L.); (F.M.C.)
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy
| | - Virginia Laurenti
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Milan, Italy; (V.L.); (F.M.C.)
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy
| | - Francesco Maria Carrano
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090 Milan, Italy; (V.L.); (F.M.C.)
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy
| | - Enrique Gonzalez-Díaz
- Pelvic Floor Unit, Department of Obstetrics and Gynaecology, Complejo Asistencial Universitario de León (CAULE), C/Altos de Nava S/N, 24080 León, Spain;
- Department of Obstetrics and Gynaecology, Complejo Asistencial Universitario de León (CAULE), C/Altos de Nava S/N, 24080 León, Spain
| | - Katarzyna Borycka-Kiciak
- Department of Colorectal, General and Oncological Surgery, Centre of Postgraduate Medical Education, 80, Ceglowska Street, 01810 Warsaw, Poland;
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Brain derived neurotrophic factor mediates accelerated recovery of regenerative electrical stimulation in an animal model of stress urinary incontinence. Exp Neurol 2021; 343:113781. [PMID: 34102241 DOI: 10.1016/j.expneurol.2021.113781] [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] [Received: 01/06/2021] [Revised: 05/22/2021] [Accepted: 06/03/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Stress urinary incontinence (SUI) is prevalent among older women and can result from insufficient regeneration of the pudendal nerve (PN). Electrical stimulation (ES) of the PN upregulates brain derived neurotrophic factor (BDNF) and accelerates regeneration. Using tyrosine kinase B (TrkB) to reduce the availability of free BDNF, the aim of this study was to determine if BDNF is necessary for accelerated recovery via ES in a model of SUI. METHODS Our SUI model consists of Female Sprague-Dawley rats, whose PNs were crushed bilaterally twice for 30 s, followed by insertion of a modified Foley catheter into the vagina with balloon inflation for 4 h. These rats were divided into 4 groups: 1) Sham PN crush and sham vaginal distension without electrode implantation and with saline treatment (sham injury); 2) SUI with sham stimulation and saline treatment (SUI); 3) SUI and ES with saline treatment (SUI&ES); and 4) SUI and ES with TrkB treatment (SUI&ES&TrkB). Animals underwent ES or sham stimulation four times a week for two weeks. Four weeks after injury, animals underwent functional testing consisting of leak point pressure (LPP) with simultaneous external urethral sphincter (EUS) electromyography (EMG) and pudendal nerve recordings. Data was analyzed using ANOVA with Holm-Sidak posthoc test (p < 0.05). EUS and PN specimen were sectioned and stained to semi-quantitatively evaluate morphology, regeneration, and reinnervation. RESULTS LPP and EUS EMG firing rate were significantly increased in the sham injury and SUI&ES groups compared to the SUI and SUI&ES&TrkB groups. EUS of SUI rats showed few innervated neuromuscular junctions compared to sham injured rats, while both treatment groups showed an increase in reinnervated neuromuscular junctions. CONCLUSION ES accelerates functional recovery via a BDNF-mediated pathway in a model of SUI. These findings suggest ES could be used as a potential regenerative therapy for women with SUI.
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11
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Application of electrical stimulation for peripheral nerve regeneration: Stimulation parameters and future horizons. INTERDISCIPLINARY NEUROSURGERY 2021. [DOI: 10.1016/j.inat.2021.101117] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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12
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Hernandez-Reynoso AG, Corona-Quintanilla DL, López-García K, Horbovetz AA, Castelán F, Zimmern P, Martínez-Gómez M, Romero-Ortega MI. Targeted neuromodulation of pelvic floor nerves in aging and multiparous rabbits improves continence. Sci Rep 2021; 11:10615. [PMID: 34011938 PMCID: PMC8136474 DOI: 10.1038/s41598-021-90088-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 04/30/2021] [Indexed: 02/03/2023] Open
Abstract
Pelvic floor muscle stretch injury during pregnancy and birth is associated with the incidence of stress urinary incontinence (SUI), a condition that affects 30-60% of the female population and is characterized by involuntary urine leakage during physical activity, further exacerbated by aging. Aging and multiparous rabbits suffer pelvic nerve and muscle damage, resulting in alterations in pelvic floor muscular contraction and low urethral pressure, resembling SUI. However, the extent of nerve injury is not fully understood. Here, we used electron microscopy analysis of pelvic and perineal nerves in multiparous rabbits to describe the extent of stretch nerve injury based on axon count, axon size, myelin-to-axon ratio, and elliptical ratio. Compared to young nulliparous controls, mid-age multiparous animals showed an increase in the density of unmyelinated axons and in myelin thickness in both nerves, albeit more significant in the bulbospongiosus nerve. This revealed a partial but sustained damage to these nerves, and the presence of some regenerated axons. Additionally, we tested whether electrical stimulation of the bulbospongiosus nerve would induce muscle contraction and urethral closure. Using a miniature wireless stimulator implanted on this perineal nerve in young nulliparous and middle age multiparous female rabbits, we confirmed that these partially damaged nerves can be acutely depolarized, either at low (2-5 Hz) or medium (10-20 Hz) frequencies, to induce a proportional increase in urethral pressure. Evaluation of micturition volume in the mid-age multiparous animals after perineal nerve stimulation, effectively reversed a baseline deficit, increasing it 2-fold (p = 0.02). These results support the notion that selective neuromodulation of pelvic floor muscles might serve as a potential treatment for SUI.
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Affiliation(s)
- Ana G Hernandez-Reynoso
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, 75080, USA
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, 75390, USA
- Department of Biomedical Engineering and Biomedical Sciences, University of Houston, Houston, TX, 77204, USA
| | - Dora L Corona-Quintanilla
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, Tlaxcala, Mexico
| | - Kenia López-García
- Departamento de Biología Celular y Fisiología, Unidad Foránea Tlaxcala, Instituto de Investigaciones Biomédicas, Universidad Autónoma de México, Tlaxcala, Tlaxcala, Mexico
| | - Ana A Horbovetz
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Francisco Castelán
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, Tlaxcala, Mexico
- Departamento de Biología Celular y Fisiología, Unidad Foránea Tlaxcala, Instituto de Investigaciones Biomédicas, Universidad Autónoma de México, Tlaxcala, Tlaxcala, Mexico
| | - Philippe Zimmern
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, 75390, USA
| | - Margarita Martínez-Gómez
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, Tlaxcala, Mexico
- Departamento de Biología Celular y Fisiología, Unidad Foránea Tlaxcala, Instituto de Investigaciones Biomédicas, Universidad Autónoma de México, Tlaxcala, Tlaxcala, Mexico
| | - Mario I Romero-Ortega
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, 75390, USA.
- Department of Biomedical Engineering and Biomedical Sciences, University of Houston, Houston, TX, 77204, USA.
- Department of Health Care Sciences, University of Texas Southwestern Medical Center, Dallas, 75390, USA.
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13
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The pudendal nerve motor branch regenerates via a brain derived neurotrophic factor mediated mechanism. Exp Neurol 2020; 334:113438. [DOI: 10.1016/j.expneurol.2020.113438] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 08/13/2020] [Accepted: 08/17/2020] [Indexed: 01/13/2023]
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14
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Plair A, Bennington J, Williams JK, Parker-Autry C, Matthews CA, Badlani G. Regenerative medicine for anal incontinence: a review of regenerative therapies beyond cells. Int Urogynecol J 2020; 32:2337-2347. [PMID: 33247762 DOI: 10.1007/s00192-020-04620-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 11/16/2020] [Indexed: 12/14/2022]
Abstract
INTRODUCTION AND HYPOTHESIS Current treatment modalities for anal sphincter injuries are ineffective for many patients, prompting research into restorative and regenerative therapies. Although cellular therapy with stem cells and progenitor cells show promise in animal models with short-term improvement, there are additional regenerative approaches that can augment or replace cellular therapies for anal sphincter injuries. The purpose of this article is to review the current knowledge of cellular therapies for anal sphincter injuries and discusses the use of other regenerative therapies including cytokine therapy with CXCL12. METHODS A literature search was performed to search for articles on cellular therapy and cytokine therapy for anal sphincter injuries and anal incontinence. RESULTS The article search identified 337 articles from which 33 articles were included. An additional 12 referenced articles were included as well as 23 articles providing background information. Cellular therapy has shown positive results for treating anal sphincter injuries and anal incontinence in vitro and in one clinical trial. However, cellular therapy has disadvantages such as the source and processing of stem cells and progenitor cells. CXCL12 does not have such issues while showing promising in vitro results for treating anal sphincter injuries. Additionally, electrical stimulation and extracorporeal shock wave therapy are potential regenerative medicine adjuncts for anal sphincter injuries. A vision for future research and clinical applications of regenerative medicine for anal sphincter deficiencies is provided. CONCLUSION There are viable regenerative medicine therapies for anal sphincter injuries beyond cellular therapy. CXCL12 shows promise as a focus of therapeutic research in this field.
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Affiliation(s)
- Andre Plair
- Department of Urology, Wake Forest Baptist Health, Winston Salem, NC, USA.
| | - Julie Bennington
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, NC, USA
| | | | | | | | - Gopal Badlani
- Department of Urology, Wake Forest Baptist Health, Winston Salem, NC, USA
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15
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Yang J, Balog B, Deng K, Hanzlicek B, Rietsch A, Kuang M, Hatakeyama S, Lach-Trifilieff E, Zhu H, Damaser MS. Therapeutic potential of muscle growth promoters in a stress urinary incontinence model. Am J Physiol Renal Physiol 2020; 319:F436-F446. [PMID: 32686522 DOI: 10.1152/ajprenal.00122.2020] [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: 11/22/2022] Open
Abstract
Weakness of urinary sphincter and pelvic floor muscles can cause insufficient urethral closure and lead to stress urinary incontinence. Bimagrumab is a novel myostatin inhibitor that blocks activin type II receptors, inducing skeletal muscle hypertrophy and attenuating muscle weakness. β2-Adrenergic agonists, such as 5-hydroxybenzothiazolone derivative (5-HOB) and clenbuterol, can enhance muscle growth. We hypothesized that promoting muscle growth would increase leak point pressure (LPP) by facilitating muscle recovery in a dual-injury (DI) stress urinary incontinence model. Rats underwent pudendal nerve crush (PNC) followed by vaginal distension (VD). One week after injury, each rat began subcutaneous (0.3 mL/rat) treatment daily in a blinded fashion with either bimagrumab (DI + Bim), clenbuterol (DI + Clen), 5-HOB (DI + 5-HOB), or PBS (DI + PBS). Sham-injured rats underwent sham PNC + VD and received PBS (sham + PBS). After 2 wk of treatment, rats were anesthetized for LPP and external urethral sphincter electromyography recordings. Hindlimb skeletal muscles and pelvic floor muscles were dissected and stained. At the end of 2 wk of treatment, all three treatment groups had a significant increase in body weight and individual muscle weight compared with both sham-treated and sham-injured rats. LPP in DI + Bim rats was significantly higher than LPP of DI + PBS and DI + Clen rats. There were more consistent urethral striated muscle fibers, elastin fibers in the urethra, and pelvic muscle recovery in DI + Bim rats compared with DI + PBS rats. In conclusion, bimagrumab was the most effective for increasing urethral pressure and continence by promoting injured external urethral sphincter and pelvic floor muscle recovery.
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Affiliation(s)
- Jun Yang
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Department of Urology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Brian Balog
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
| | - Kangli Deng
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
| | - Brett Hanzlicek
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
| | - Anna Rietsch
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
| | - Mei Kuang
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
| | - Shinji Hatakeyama
- Novartis Institutes for BioMedical Research, Novartis pharma AG, Basel, Switzerland
| | | | - Hui Zhu
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio.,Glickman Urologic and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Margot S Damaser
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio.,Glickman Urologic and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
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16
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Jiang HH, Ji LX, Li HY, Song QX, Bano Y, Chen L, Liu G, Wang M. Combined Treatment With CCR1-Overexpressing Mesenchymal Stem Cells and CCL7 Enhances Engraftment and Promotes the Recovery of Simulated Birth Injury-Induced Stress Urinary Incontinence in Rats. Front Surg 2020; 7:40. [PMID: 32850943 PMCID: PMC7412717 DOI: 10.3389/fsurg.2020.00040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 05/28/2020] [Indexed: 01/07/2023] Open
Abstract
Objective: To observe whether urethral injection of chemokine (c-c motif) ligand 7 (CCL7) and overexpressing CC receptor 1 (CCR1) in mesenchymal stem cells (MSCs) can promote their homing and engraftment to the injured tissue, and improve the recovery of simulated birth injury-induced stress urinary incontinence (SUI) in rats. Methods: Female rats underwent a dual injury consisting of vaginal distension (VD) and pudendal nerve crush (PNC) to induce SUI. Bone marrow-derived MSCs were transduced with lentivirus carrying CCR1 (MSC-CCR1) and green fluorescent protein (GFP). Forty virgin Sprague–Dawley rats were evenly distributed into four groups: sham SUI + MSC-CCR1+CCL7, SUI + MSCs, SUI + MSC-CCR1, and SUI + MSC-CCR1+CCL7 group. The engrafted MSCs in urethra were quantified. Another three groups of rats, including sham SUI + sham MSC-CCR1+CCL7 treatment, SUI + sham MSC-CCR1+CCL7 treatment, and SUI + MSC-CCR1+CCL7 treatment group, were used to evaluate the functional recovery by testing external urethral sphincter electromyography (EUS EMG), pudendal nerve motor branch potentials (PNMBP), and leak point pressure (LPP) 1 week after injury and injection. Urethra and vagina were harvested for histological examination. Results: The SUI + MSC-CCR1+CCL7 group received intravenous injection of CCR1-overexpressing MSCs and local injection of CCL7 after simulated birth injury had the most engraftment of MSCs to the injured tissues and best functional recovery from SUI compared to other groups. Histological examination showed a partial repair in the SUI + MSC-CCR1+CCL7 group. Conclusions: Our study demonstrated combined treatment with CCR1-overexpressing MSCs and CCL7 can increase engraftment of MSCs and promote the functional recovery of simulated birth trauma-induced SUI in rats, which could be a new therapeutic strategy for SUI.
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Affiliation(s)
- Hai-Hong Jiang
- Department of Urology and Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Ling-Xiao Ji
- Department of Urology and Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.,Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hai-Yan Li
- Department of Urology and Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qi-Xiang Song
- Department of Urology, Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Yasmeen Bano
- Department of Urology and Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Lei Chen
- Department of Urology and Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Guiming Liu
- Department of Surgery/Urology, MetroHealth Medical Center, Case Western Reserve University, Cleveland, OH, United States
| | - Meihao Wang
- Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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17
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Effects of an alpha-1d adrenoreceptor antagonist (naftopidil) on bladder dysfunction after radiotherapy in female rats. Int Urogynecol J 2020; 32:2747-2755. [PMID: 32761376 DOI: 10.1007/s00192-020-04472-5] [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: 04/30/2020] [Accepted: 07/23/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE Storage-phase bladder dysfunction can develop after pelvic radiotherapy. As the alpha-1d adrenoreceptor (a1d-AR) is dominant in the human detrusor, we aimed to investigate the effect of an a1d-AR antagonist on bladder dysfunction after pelvic radiotherapy in a rat model. MATERIALS AND METHODS Twenty-four female Wistar rats were used. Eight rats (14-15 weeks, 250-300 g) were randomized to three groups (normal reference group, radiation alone group and radiation plus naftopidil group). An 18-Gy dose of radiotherapy was applied to the radiation alone and radiation plus naftopidil groups. Naftopidil (20 mg/kg) was administered daily to the radiation plus naftopidil group. Four weeks after radiation, all rats underwent cystometry and were killed for reverse transcription polymerase chain reaction to detect mRNAs [a1d-AR, brain-derived neurotrophic factor (BDNF) and vascular endothelial growth factor (VEGF)], Western blot to detect proteins (a1d-AR, extracellular-signal-regulated kinase, BDNF and VEGF) and immunohistochemistry. RESULTS Compared to the radiation alone group, (1) the decrease in the mRNA and protein expression of a1d-AR and VEGF was ameliorated, (2) the increase in the expression of BDNF mRNA and proteins such as extracellular-signal-regulated kinase and BDNF was suppressed, (3) submucosal thickness and vascularity on immunohistochemistry were improved, and (4) the baseline intravesical pressure and intercontraction interval in cystometry were ameliorated in the radiation plus naftopidil group. CONCLUSION Administration of an a1d-AR antagonist could improve storage-phase bladder dysfunction after radiotherapy not only by upregulating a1d-AR, which might decrease bladder compliance, but also by enhancing vascularity, which might protect the urinary bladder from chronic ischemic inflammation.
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18
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Ness TJ, McNaught J, Clodfelder-Miller B, Su X. Medications used to treat bladder disorders may alter effects of neuromodulation. Neurourol Urodyn 2020; 39:1313-1320. [PMID: 32330365 DOI: 10.1002/nau.24373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 04/15/2020] [Indexed: 11/09/2022]
Abstract
AIMS Neuromodulation (nerve stimulation) can produce analgesia. One form, bilateral pudendal nerve stimulation (bPNS), suppresses responses to urinary bladder distension (UBD) in hypersensitive rats. Drugs can modify this effect (eg, benzodiazepines, but not opioids, suppress bPNS effects). Prior to a clinical trial of bPNS effects on bladder pain, we felt it was prudent to survey the effects of medications commonly used in patients with bladder disorders. METHODS Bladder hypersensitivity was produced by neonatal bladder inflammation in rat pups coupled with a second inflammatory insult as an adult. Antimuscarinic (oxybutynin), β3 -adrenoceptor agonist (mirabegron, CL316243), α1 -adrenoceptor antagonist (tamsulosin), antidepressant (amitriptyline), muscle relaxing (baclofen), and sedative (propofol) agents were administered and effects of bPNS on responses to UBD assessed. bPNS consisted of bilateral biphasic electrical stimulation of the mixed motor/sensory component of the pudendal nerves. Visceromotor responses (VMRs; abdominal muscle contractile responses) were used as nociceptive endpoints. RESULTS Many of these drugs directly inhibited the VMRs to UBD, but only mirabegron, at the doses employed, significantly reduced inhibitory effects of bPNS. In the presence of the other drugs, bPNS continued to produce statistically significant inhibition of VMRs to UBD. CONCLUSIONS This study suggests that concurrent therapy with drugs used to treat bladder disorders could affect assessment of the effects of bPNS on bladder hypersensitivity. This study gives guidance to clinical trials using bPNS for the treatment of painful bladder syndromes and suggests potential clinical use of some of these medications in the treatment of these same disorders.
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Affiliation(s)
- Timothy J Ness
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jamie McNaught
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Buffie Clodfelder-Miller
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Xin Su
- Global Neuromodulation Research, Medtronic, Inc
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19
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Abstract
PURPOSE OF REVIEW The present review highlights regenerative electrical stimulation (RES) as potential future treatment options for patients with nerve injuries leading to urological dysfunction, such as urinary incontinence, voiding dysfunction or erectile dysfunction. Additionally, it will highlight the mechanism of nerve injury and regeneration as well as similarities and differences between RES and current electrical stimulation treatments in urology, functional electrical stimulation (FES) and neuromodulation. RECENT FINDINGS It has been demonstrated that RES upregulates brain-derived neurotrophic factor (BDNF) and its receptor to facilitate neuroregeneration, facilitating accurate reinnervation of muscles by motoneurons. Further, RES upregulates growth factors in glial cells. Within the past 2 years, RES of the pudendal nerve upregulated BDNF in Onuf's nucleus, the cell bodies of motoneurons that course through the pudendal nerve and accelerated functional recovery in an animal model of stress urinary incontinence. Additionally, electrical stimulation of the vaginal tissue in an animal model of stress urinary incontinence accelerated functional recovery. SUMMARY RES has great potential but future research is needed to expand the potential beneficial effects of RES in the field of urology.
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20
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Coolen RL, Groen J, Blok B. Electrical stimulation in the treatment of bladder dysfunction: technology update. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2019; 12:337-345. [PMID: 31572023 PMCID: PMC6750158 DOI: 10.2147/mder.s179898] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/24/2019] [Indexed: 01/24/2023] Open
Abstract
The urinary bladder has two functions: urine storage and voiding. Clinically, two major categories of lower urinary tract symptoms can be defined: storage symptoms such as incontinence and urgency, and voiding symptoms such as feeling of incomplete bladder emptying and slow urinary stream. Urgency to void with or without incontinence is called overactive bladder (OAB). Slow urinary stream, hesitancy, and straining to void with the feeling of incomplete bladder emptying are often called underactive bladder (UAB). The underlying causes of OAB or UAB can be either non-neurogenic (also referred to as idiopathic) and neurogenic, for example due to spinal cord injury or multiple sclerosis. OAB and UAB can be treated conservatively by lifestyle intervention or medication. In the case that conservative treatment does not provide sufficient benefit, electrical stimulation can be used. Sacral neurostimulation or neuromodulation (SNM) is offered as a third-line therapy to patients with non-neurogenic OAB or UAB. In SNM, the third or fourth sacral nerve root is stimulated and after a test period, a neuromodulator is implanted in the buttock. Until recently only a non-rechargeable neuromodulator was approved for clinical use. However, nowadays, a rechargeable sacral neuromodulator is also on the market, with similar safety and effectiveness to the non-rechargeable SNM system. The rechargeable device was approved for full body 1.5T and 3T MRI in Europe in February 2019. Regarding neurogenic lower urinary tract dysfunction, electrical stimulation only seems to benefit a selected group of patients.
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Affiliation(s)
- R L Coolen
- Department of Urology, Erasmus Medical Center, Rotterdam 3015 GD, The Netherlands
| | - J Groen
- Department of Urology, Erasmus Medical Center, Rotterdam 3015 GD, The Netherlands
| | - Bfm Blok
- Department of Urology, Erasmus Medical Center, Rotterdam 3015 GD, The Netherlands
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21
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Deng K, Balog BM, Lin DL, Hanzlicek B, Song QX, Zhu H, Damaser MS. Daily bilateral pudendal nerve electrical stimulation improves recovery from stress urinary incontinence. Interface Focus 2019; 9:20190020. [PMID: 31263536 DOI: 10.1098/rsfs.2019.0020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/29/2019] [Indexed: 01/04/2023] Open
Abstract
Stress urinary incontinence (SUI) in women is strongly associated with childbirth which injures the pudendal nerve (PN) and the external urethral sphincter (EUS) during delivery. Electrical stimulation (ES) can increase brain-derived neurotrophic factor (BDNF) expression in injured neurons, activate Schwann cells and promote neuroregeneration after nerve injury. The aim of this study was to determine if more frequent ES would increase recovery from SUI in a rat model. Forty female Sprague-Dawley rats underwent either sham injury or pudendal nerve crush (PNC) and vaginal distention (VD) to establish SUI. Immediately after injury, electrodes were implanted at the pudendal nerve bilaterally. Each injured animal underwent sham ES, twice per week ES (2/week), or daily ES of 1 h duration for two weeks. Urethral and nerve function were assessed with leak point pressure (LPP), EUS electromyography and pudendal nerve sensory branch potential (PNSBP) recordings two weeks after injury. LPP was significantly increased after daily ES compared to 2/week ES. EUS neuromuscular junction innervation was decreased after injury with sham ES, but improved after 2/week or daily ES. This study demonstrates that daily bilateral ES to the pudendal nerve can accelerate recovery from SUI. Daily ES improved urethral function more than 2/week ES.
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Affiliation(s)
- Kangli Deng
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA.,Department of Urology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430079, People's Republic of China.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave. ND20, Cleveland, OH 44195, USA
| | - Brian M Balog
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave. ND20, Cleveland, OH 44195, USA.,Department of Biology, University of Akron, Akron, OH, USA
| | - Dan Li Lin
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave. ND20, Cleveland, OH 44195, USA
| | - Brett Hanzlicek
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave. ND20, Cleveland, OH 44195, USA
| | - Qi-Xiang Song
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave. ND20, Cleveland, OH 44195, USA.,Department of Urology, Changhai Hospital, The Second Military Medical University, Shanghai, People's Republic of China
| | - Hui Zhu
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA.,Glickman Urologic and Kidney Institute, Cleveland Clinic, 9500 Euclid Ave. Q100, Cleveland, OH 44195, 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, 9500 Euclid Ave. ND20, Cleveland, OH 44195, USA.,Glickman Urologic and Kidney Institute, Cleveland Clinic, 9500 Euclid Ave. Q100, Cleveland, OH 44195, USA
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