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Li C, Yang M, Qu Z, Ruan S, Chen B, Ran J, Shu W, Chen Y, Hou W. Effect of electroacupuncture on the degradation of collagen in pelvic floor supporting tissue of stress urinary incontinence rats. Int Urogynecol J 2022; 33:2233-2240. [PMID: 35226143 PMCID: PMC9343271 DOI: 10.1007/s00192-022-05106-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 01/16/2022] [Indexed: 10/26/2022]
Abstract
INTRODUCTION AND HYPOTHESIS To examine the changes induced by electroacupuncture in stress urinary incontinence (SUI) rats, including the urodynamics and collagen degradation-related cytokine molecular biological expression changes, and to explore the effect and mechanism of EA treatment in SUI. METHODS Female SPF Sprague-Dawley rats were randomly assigned to five groups (n = 10): sham, model, electroacupuncture control, electroacupuncture, and blocker. The leak point pressure (LPP) and maximum bladder capacity (MBC) were measured for each group of rats, and collagen I, collagen III, matrix metalloproteinases (MMPs), and tissue inhibitor of metalloproteinase (TIMPs) in the anterior vaginal wall of rats in each group were determined by reverse transcription-polymerase chain reaction and western blotting. The data were analyzed by one-way analysis of variance or Kruskal-Wallis test. RESULTS Electroacupuncture Shenshu (BL23) and Huiyang (BL35) increased the LPP and MBC in SUI rats (P < 0.05). Electroacupuncture treatment significantly increased the protein expression of collagen I and collagen III in the anterior vaginal wall of SUI rats (P < 0.05) and significantly reduced the protein expression of MMP1, MMP2, and MMP9 (P < 0.05). CONCLUSIONS Electroacupuncture stimulation can alleviate the signs of SUI, and its mechanism is related to the degradation of collagen in the anterior vaginal wall.
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Affiliation(s)
- Chaonan Li
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Mengyi Yang
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Zhiyu Qu
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Shuoquan Ruan
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Bingli Chen
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Jinchuan Ran
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Wen Shu
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China
| | - Yuelai Chen
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China.
| | - Wenguang Hou
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, 200437, China.
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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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van der Lely S, Schmidhalter MR, Knüpfer SC, Sartori AM, Schneider MP, Stalder SA, Kessler TM, Liechti MD, Mehnert U. Lower urinary tract electrical sensory assessment: A systematic review and meta-analysis. BJU Int 2021; 130:166-180. [PMID: 34390120 PMCID: PMC9545760 DOI: 10.1111/bju.15574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Objectives To summarize the current literature on lower urinary tract electrical sensory assessment (LUTESA), with regard to current perception thresholds (CPTs) and sensory evoked potentials (SEPs), and to discuss the applied methods in terms of technical aspects, confounding factors, and potential for lower urinary tract (LUT) diagnostics. Methods The review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta‐Analyses (PRISMA) statement. Medline (PubMed), Embase and Scopus were searched on 13 October 2020. Meta‐analyses were performed and methodological qualities of the included studies were defined by assessing risk of bias (RoB) as well as confounding. Results After screening 9925 articles, 80 studies (five randomized controlled trials [RCTs] and 75 non‐RCTs) were included, comprising a total of 3732 patients and 692 healthy subjects (HS). Of these studies, 61 investigated CPTs exclusively and 19 reported on SEPs, with or without corresponding CPTs. The recording of LUTCPTs and SEPs was shown to represent a safe and reliable assessment of LUT afferent nerve function in HS and patients. LUTESA demonstrated significant differences in LUT sensitivity between HS and neurological patients, as well as after interventions such as pelvic surgery or drug treatments. Pooled analyses showed that several stimulation variables (e.g. stimulation frequency, location) as well as patient characteristics might affect the main outcome measures of LUTESA (CPTs, SEP latencies, peak‐to‐peak amplitudes, responder rate). RoB and confounding was high in most studies. Conclusions Preliminary data show that CPT and SEP recordings are valuable tools to more objectively assess LUT afferent nerve function. LUTESA complements already established diagnostics such as urodynamics, allowing a more comprehensive patient evaluation. The high RoB and confounding rate was related to inconsistency and inaccuracy in reporting rather than the technique itself. LUTESA standardization and well‐designed RCTs are crucial to implement LUTESA as a clinical assessment tool.
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Affiliation(s)
- Stéphanie van der Lely
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Melanie R Schmidhalter
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Stephanie C Knüpfer
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.,Department of Urology, University Hospital of Bonn, Bonn, Germany
| | - Andrea M Sartori
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.,Department of Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, USA
| | - Marc P Schneider
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Stephanie A Stalder
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Thomas M Kessler
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Martina D Liechti
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Ulrich Mehnert
- Department of Neuro-Urology, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
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The pathophysiology of stress urinary incontinence: a systematic review and meta-analysis. Int Urogynecol J 2021; 32:501-552. [PMID: 33416968 PMCID: PMC8053188 DOI: 10.1007/s00192-020-04622-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 11/16/2020] [Indexed: 01/15/2023]
Abstract
Introduction and hypothesis To evaluate the evidence for pathologies underlying stress urinary incontinence (SUI) in women. Methods For the data sources, a structured search of the peer-reviewed literature (English language; 1960–April 2020) was conducted using predefined key terms in PubMed and Embase. Google Scholar was also searched. Peer-reviewed manuscripts that reported on anatomical, physiological or functional differences between females with signs and/or symptoms consistent with SUI and a concurrently recruited control group of continent females without any substantive urogynecological symptoms. Of 4629 publications screened, 84 met the inclusion criteria and were retained, among which 24 were included in meta-analyses. Results Selection bias was moderate to high; < 25% of studies controlled for major confounding variables for SUI (e.g., age, BMI and parity). There was a lack of standardization of methods among studies, and several measurement issues were identified. Results were synthesized qualitatively, and, where possible, random-effects meta-analyses were conducted. Deficits in urethral and bladder neck structure and support, neuromuscular and mechanical function of the striated urethral sphincter (SUS) and levator ani muscles all appear to be associated with SUI. Meta-analyses showed that observed bladder neck dilation and lower functional urethral length, bladder neck support and maximum urethral closure pressures are strong characteristic signs of SUI. Conclusion The pathology of SUI is multifactorial, with strong evidence pointing to bladder neck and urethral incompetence. While there is also evidence of impaired urethral support and levator ani function, standardized approaches to measurement are needed to generate higher levels of evidence.
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Malot C, Chesnel C, Hentzen C, Haddad R, Miget G, Grasland M, Le Breton F, Amarenco G. [Urethral reflexes: A review]. Prog Urol 2020; 31:651-662. [PMID: 33250359 DOI: 10.1016/j.purol.2020.10.008] [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: 10/26/2018] [Revised: 07/21/2020] [Accepted: 10/08/2020] [Indexed: 10/22/2022]
Abstract
INTRODUCTION The urethrosphincter complex is involved not only in maintaining urinary continence, particularly during effort, but also for the achievement of a complete and effective micturition. Indeed, the urethra is not a simple passive channel for the evacuation of urine from the bladder to the urethral meatus, since its resistive capacities and its possibilities of modulation of the micturition reflex depend on its reflex role either as a sensory afferent or as a neuro-muscular effector. It also participates in many genito-sexual and ano-rectal réflexes. MATERIAL AND METHOD This review of the literature describes the various reflexes of the urethra as a sensory stimulus or a neuromuscular effector. All articles referenced in this review were obtained from articles indexed on Pubmed-Medline, using the keywords: "urethral reflexes; "reflex bladder"; "urination reflex"; "intravaginal; vaginal"; "anorectal; sphincter"; "Storage and voiding"; "reflexes sneezing"; "cough reflex". Other articles were selected through references of the articles issued from the first research. Only articles in English and French have been selected. The articles concerned animal and human experiments. RESULTS Eight hundred and sixty-four referenced articles were founded and a total of 75 articles were included, describing the various reflexes mediated by the urethra acting as a sensory afferent or mechanical effector. We differentiated the known data in humans and animals. CONCLUSION The urethra is a complex anatomical structure ensuring, through numerous reflex mechanisms, urinary continence. Urethral resistances are modulated during efforts and depends on the bladder capacity and the intensity of the efforts. During micturition, the coordination between the bladder and the urethra is mediated by reflex pathways organized at the cerebral, spinal and lumbosacral levels. The modulation of the micturition in term of efficacy and velocity, is due in part, to the re-afferentation of the spinal reflex by continuous stimulus of the urethral canal. Many of these reflexes are imperfectly described. Finally, the urethra is implicated in reflex loops of anal continence and sexual functions.
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Affiliation(s)
- C Malot
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - C Chesnel
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - C Hentzen
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - R Haddad
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - G Miget
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - M Grasland
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - F Le Breton
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France
| | - G Amarenco
- Hôpital Tenon, Sorbonne université, GRC 001, GREEN groupe de recherche clinique en neuro-urologie, AP-HP, 75020 Paris, France.
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Brusciano L, Gambardella C, Roche B, Tolone S, Romano RM, Tuccillo F, Del Genio G, Terracciano G, Gualtieri G, Docimo L. Dynamic transperineal ultrasonography correlates with prolonged pudendal nerve latency in female with fecal incontinence. Updates Surg 2020; 72:1187-1194. [PMID: 32596803 DOI: 10.1007/s13304-020-00838-y] [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: 04/14/2020] [Accepted: 06/21/2020] [Indexed: 12/17/2022]
Abstract
The pelvic floor is a complex anatomical entity and its neuromuscular assessment is evaluated through debated neurophysiological tests. An innovative approach is the study of pelvic floor through dynamic transperineal ultrasound (DTU). The aim of this study is to evaluate DTU sensitivity in recognizing patients with fecal incontinence and to evaluate its concordance with the results of the motor latency studied via pudendal nerve terminal motor latency (PNTML). Female patients affected by FI addressed to our center of coloproctology were prospectively assessed. After a coloproctological evaluation, comprising the PNTML assessment to identify pudendal neuropathy, patients were addressed to DTU to determine anterior and posterior displacement of puborectalis muscle by a blinded coloproctologist. In order to compare the data, a cohort of female healthy volunteers was enrolled. Sixty-eight subjects (34 patients and 34 healthy volunteers) were enrolled. The sensitivities of anterior displacement, posterior displacement and either anterior or posterior displacement in determining the fecal incontinence were 82%, 67% and 91%, respectively. A further high correlation of either anterior or posterior displacement with PTNML was also noted (88%). DTU is an indirect, painless and reproducible method for the identification of the pelvic floor neuromuscular integrity. Its findings seem to highly correlate with FI symptoms and with PNTML results. In the near future, after larger comparative studies, DTU would be considered a potential reliable non-invasive and feasible indirect procedure in the identification of fecal incontinence by pudendal neuropathy. Trial registration number is NCT03933683.
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Affiliation(s)
- Luigi Brusciano
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Claudio Gambardella
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy. .,Department of Cardiothoracic Sciences, School of Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy.
| | - Bruno Roche
- Proctology Unit, Division of Visceral Surgery, Department of Surgery, Geneva University Hospitals and Medical School, 4 Rue Gabrielle-Perret-Gentil, Geneva 14, 1211, Geneva, Switzerland
| | - Salvatore Tolone
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Roberto Maria Romano
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Francesco Tuccillo
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Gianmattia Del Genio
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Gianmattia Terracciano
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Giorgia Gualtieri
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
| | - Ludovico Docimo
- Division of General, Mini-Invasive and Obesity Surgery, University of Study of Campania "Luigi Vanvitelli" Naples, via Luigi Pansini n° 5, 80131, Naples, Italy
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Mirto-Aguilar N, Palacios JL, Munoz A, Juárez M, Cruz Y. Urethral regions with differential tissular composition may underlie urinary continence and voiding function in female rats. Neurourol Urodyn 2019; 38:893-901. [PMID: 30779374 DOI: 10.1002/nau.23934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 01/10/2019] [Indexed: 11/07/2022]
Abstract
AIMS To analyze, in female rats, the anatomical and histological features of the urethra and its relationship with the vagina and clitoris, and its innervation. METHODS Seventeen adult female Wistar rats were used. Gross anatomy and acetylcholinesterase (AchE) histochemistry were performed to describe the urethral features, adjacent structures, and innervation. The histomorphometric characteristics of the urethra were determined in transversal, longitudinal, or coronal sections stained with Masson's Trichrome. RESULTS The female rat urethra is not a homogeneous tubular organ. The pre-pelvic and pelvic regions are firmly attached to the vagina with belt-like striated fibers forming a urethra-vaginal complex. The bulbar regions have curved segments and a narrow lumen. The clitoral region is characterized by a urethra-clitoral complex surrounded by a vascular plexus. The lumen area and thickness of the urethral layers significantly varied between regions (P < 0.05). Innervation of the urethra arrives from the major pelvic ganglion, the dorsal nerve of the clitoris (DNC), and the motor branch of the sacral plexus (MBSP). CONCLUSIONS Differential tissular composition of the urethra may underlie urinary continence and voiding dysfunction through different physiological mechanisms. The urethra-vagina complex seems to be the main site controlling urinary continence through active muscular mechanisms, while the bulbar urethra provides passive mechanisms and the urethra-clitoris complex seems to be crucial for distal urethral closure by means of a periurethral vascular network.
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Affiliation(s)
- Nancy Mirto-Aguilar
- Doctorado en Investigaciones Cerebrales, Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa, Veracruz, México
| | - José L Palacios
- Doctorado en Ciencias Biológicas, Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, Tlaxcala, México
| | - Alvaro Munoz
- Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, Jalisco, México
| | - Margarita Juárez
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| | - Yolanda Cruz
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, México
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Castelán F, López‐García K, Moreno‐Pérez S, Zempoalteca R, Corona‐Quintanilla DL, Romero‐Ortega MI, Jiménez‐Estrada I, Martínez‐Gómez M. Multiparity affects conduction properties of pelvic floor nerves in rabbits. Brain Behav 2018; 8:e01105. [PMID: 30240150 PMCID: PMC6192397 DOI: 10.1002/brb3.1105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 07/27/2018] [Accepted: 07/31/2018] [Indexed: 11/07/2022] Open
Abstract
INTRODUCTION Women often develop pelvic floor dysfunction due to damage to the pelvic musculature during childbirth; however, the effect on pelvic floor nerves function is less understood. This study used adult rabbits to evaluate the electrophysiological and histological characteristics of the bulbospongiosus (Bsn) and pubococcygeus nerves (Pcn) in multiparity. METHODS Compound nerve action potentials (CNAP) were compared between age-matched nulliparous and multiparous animals and associated to the histological characteristics of myelinated axons from the Bsn and Pcn nerves. The extensor digitorum longus nerve (EDLn) was used as negative control. Data were analyzed with unpaired two-tailed Student's t test or Mann-Whitney U test to determine significant differences between groups. RESULTS The onset and peak latencies, duration, and conduction velocity of the motor fibers in these pelvic nerves were not significantly different between nulliparous and multiparous animals. However, the peak-to-peak amplitude and area of the CNAP in both Bsn and Pcn were reduced in multiparous rabbits. Histology showed a higher percentage of axons with myelin disorganization caused by multiparity in these pelvic nerves. Together, the data indicate a reduction in the number of functional pelvic axons due to multiparity. As expected, no effect of parity was observed in the EDLn controls. CONCLUSIONS Present findings demonstrated that multiparity affects myelination and consequently conduction properties in the small pelvic floor nerves.
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Affiliation(s)
- Francisco Castelán
- Departamento de Biología Celular y Fisiología, Unidad Foránea Tlaxcala, Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoTlaxcalaMéxico
- Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMéxico
| | - Kenia López‐García
- Departamento de Biología Celular y Fisiología, Unidad Foránea Tlaxcala, Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoTlaxcalaMéxico
| | - Suelem Moreno‐Pérez
- Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMéxico
| | - René Zempoalteca
- Maestría en Ciencias BiológicasUniversidad Autónoma de TlaxcalaTlaxcalaMéxico
| | | | | | - Ismael Jiménez‐Estrada
- Departamento de Fisiología, Biofísica y NeurocienciasCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalCiudad de MéxicoMéxico
| | - Margarita Martínez‐Gómez
- Departamento de Biología Celular y Fisiología, Unidad Foránea Tlaxcala, Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoTlaxcalaMéxico
- Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMéxico
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Gregorini F, Knüpfer SC, Liechti MD, Schubert M, Curt A, Kessler TM, Mehnert U. Sensory evoked potentials of the bladder and urethra in middle-aged women: the effect of age. BJU Int 2015; 115 Suppl 6:18-25. [PMID: 25626360 DOI: 10.1111/bju.13066] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To investigate feasibility, reproducibility and age dependency of sensory evoked cortical potentials (SEPs) after electrical stimulation of different locations in the lower urinary tract (LUT) in a cohort of middle-aged healthy women. SUBJECTS AND METHODS In a group of 10 healthy middle-aged women [mean (sd) height 165 (5) cm and age 43 (6) years), electrical stimulation (0.5 and 3 Hz) was applied to the bladder dome, trigone, and proximal and distal urethra. SEPs were recorded at the Cz electrode with reference to Fz. All measurements were repeated three times with an interval of 3-5 weeks. Current perception thresholds (CPT), SEP latencies and amplitudes were analysed. Results were compared with a group of younger women published previously. RESULTS LUT SEPs demonstrated two positive (P1, P2) and one negative peak (N1). The mean (sd) N1 latency was 108.9 (7.8), 116.2 (10.7), 113.2 (13.4) and 131.3 (35.6) ms for the bladder dome, trigone, proximal and distal urethra, respectively. N1 latencies, except for the distal urethra, were significantly shorter than those in younger women. Taking all data, i.e. young and middle-aged women, into account, there was a significant negative correlation between the variable age and CPT/dome (r = -0.462, P = 0.04) and N1 latency/dome (r = -0.605, P = 0.005) and a significant positive correlation between the variable age and N1P2 amplitude/dome (r = 0.542, P = 0.014). CONCLUSION LUT SEPs can be induced in middle-aged women with reliable N1 responses. Unexpectedly, N1 responses reveal a shortening with increasing age particularly when compared with younger women. Changes in sensory afferents may be explained by age-related qualitative reorganisations within the urothelium and suburothelium potentially altering afferent nerve excitability, which may have an impact on the development of non-neurological LUT symptoms (LUTS, e.g. overactive bladder) in women.
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Affiliation(s)
- Flavia Gregorini
- Department of Neuro-Urology, Spinal Cord Injury Centre and Research, University of Zürich, Balgrist University Hospital, Zürich, Switzerland
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10
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Urethral sensation following reconstructive pelvic surgery. Int Urogynecol J 2014; 25:1569-73. [PMID: 24825353 DOI: 10.1007/s00192-014-2409-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 04/13/2014] [Indexed: 10/25/2022]
Abstract
INTRODUCTION AND HYPOTHESIS Most urethral neuromuscular function data focus on efferent rather than afferent innervation. We aimed to determine if changes exist in urethral afferent nerve function before and after reconstructive pelvic surgery (RPS). Secondarily, we compared afferent urethral innervation in women with and without stress urinary incontinence undergoing RPS. METHODS Participants underwent current perception threshold (CPT) and urethral anal reflex (UAR) testing prior to surgery and again post-operatively. Wilcoxon signed ranked test and Spearman's correlations were used and all tests were two-sided. p = 0.05 was considered to indicate statistical significance. RESULTS Urethral CPT thresholds increased significantly after RPS, consistent with decreased urethral afferent function. Pre-operative urethral CPT thresholds at 5 and 250 Hz were lower in SUI women (10 [IQR 5-29], 40 [32-750]) compared with continent women (63 [14-99], 73 [51-109]; p = 0.45, p = 0.020), signifying increased urethral sensation or easier activation of urethral afferents in SUI women. CONCLUSIONS Reconstructive pelvic surgery is associated with a short-term deleterious impact on urethral afferent function, as demonstrated by the higher levels of stimuli required to activate urethral afferent nerves (decreased urethral sensation) immediately after RPS. Women with SUI required lower levels of stimuli to activate urethral afferent nerves prior to RPS, although UAR latencies were similar regardless of concomitant SUI.
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