1
|
Abe-Takahashi Y, Kitta T, Ouchi M, Chiba H, Higuchi M, Togo M, Kusakabe N, Kakizaki H, Shinohara N. Morphological examination of pelvic floor muscles in a rat model of vaginal delivery. BMC Pregnancy Childbirth 2024; 24:95. [PMID: 38297206 PMCID: PMC10832168 DOI: 10.1186/s12884-024-06278-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 01/17/2024] [Indexed: 02/02/2024] Open
Abstract
OBJECTIVE This study investigated morphological changes in the composition of the pelvic floor muscles, degree of atrophy, and urethral function in a rat of simulated birth trauma induced by vaginal distension (VD) model. METHODS Female Sprague-Dawley rats were classified into four groups: a sham group, and 1, 2, and 4 weeks post-VD (1 W, 2 W, and 4 W, respectively) groups. We measured the amplitude of urethral response to electrical stimulation (A-URE) to evaluate urethral function. After measuring the muscle wet weight of the pubococcygeus (Pcm) and iliococcygeus (Icm) muscles, histochemical staining was used to classify muscle fibers into Types I, IIa, and IIb, and the occupancy and cross-sectional area of each muscle fiber were determined. RESULTS There were 24 Sprague-Dawley rats used. A-URE was significantly lower in the 1 W group versus the other groups. Muscle wet weight was significantly lower in the VD groups versus the sham group for Pcm. The cross-sectional area of Type I Pcm and Icm was significantly lower in the VD groups versus the sham group. Type I muscle fiber composition in Pcm was significantly lower in the VD groups versus the sham groupand lowest in the 2 W group. Type I muscle fiber composition in Icm was significantly lower in the 2 and 4 W groups versus the sham group. CONCLUSION Muscle atrophy and changes in muscle composition in the pelvic floor muscles were observed even after improvements in urethral function. These results may provide insight into the pathogenesis of stress urinary incontinence after VD.
Collapse
Affiliation(s)
- Yui Abe-Takahashi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Department of Physical Therapy, Faculty of Health Sciences, Hokkaido University of Science, Sapporo, Japan
| | - Takeya Kitta
- Department of Renal and Urologic Surgery, Asahikawa Medical University, Asahikawa, Japan.
| | - Mifuka Ouchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hiroki Chiba
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Madoka Higuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Mio Togo
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Naohisa Kusakabe
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hidehiro Kakizaki
- Department of Renal and Urologic Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Nobuo Shinohara
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| |
Collapse
|
2
|
Şenyuva İ, Acar DB, Demirel HH, Tunç E. The effects of progesterone on the healing of obstetric anal sphincter damage in female rats. Open Med (Wars) 2023; 18:20230786. [PMID: 37693836 PMCID: PMC10487381 DOI: 10.1515/med-2023-0786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/29/2023] [Accepted: 08/07/2023] [Indexed: 09/12/2023] Open
Abstract
We aimed to evaluate the effects of postpartum progesterone on obstetric anal sphincter injury (OASI) healing in female rats using an experimental OASI model. Twenty-eight female rats were divided into four groups after birth: sham-30, sham-90, progesterone (P4)-30, and P4-90. Moreover, OASI model was established in all groups. Subsequently, except for the sham groups, medroxyprogesterone acetate (0.15 mg) was intramuscularly injected into the P4 groups. After 30 and 90 days, the rats were euthanized under general anesthesia after recording the data. The anal sphincter region was collected for histopathological examination. Progesterone and thiol/disulfide homeostasis studies were performed on blood samples. No significant differences were observed between the groups regarding the external anal sphincter (EAS), internal anal sphincter (IAS), or connective tissue thickness (p = 0.714, p = 0.135, and p = 0.314, respectively). No statistically significant differences in the total thiol, native thiol, disulfide, and progesterone levels were found between the groups (p = 0.917, p = 0.503, p = 0.361, and p = 0.294, respectively). The endometrial thickness was lower in the P4 groups than in the sham groups (p = 0.031). Postpartum progesterone administration did not affect IAS and EAS or connective tissue thickness or disrupt the thiol-disulfide balance. However, this administration led to endometrial thinning.
Collapse
Affiliation(s)
- İrem Şenyuva
- Medical Faculty, Department of Obstetrics and Gynecology, Uşak University, Uşak, Turkey
| | - Duygu Baki Acar
- Veterinary Faculty, Department of Obstetrics and Gynecology, Afyon Kocatepe University, Afyon, Turkey
| | - Hasan Hüseyin Demirel
- Veterinary Faculty, Department of Pathology, Bayat Vocational School, Afyon Kocatepe University, Afyon, Turkey
| | - Ece Tunç
- Veterinary Faculty, Department of Obstetrics and Gynecology, Afyon Kocatepe University, Afyon, Turkey
| |
Collapse
|
3
|
Cheng Y, Abulikim K, Li TC, Wu XY, Yuan XY, Du GH, Xu SF. Analysis of urethral blood flow by high-resolution laser speckle contrast imaging in a rat model of vaginal distension. Microvasc Res 2023; 148:104541. [PMID: 37116781 DOI: 10.1016/j.mvr.2023.104541] [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: 02/10/2023] [Revised: 04/09/2023] [Accepted: 04/17/2023] [Indexed: 04/30/2023]
Abstract
OBJECTIVE To investigate the feasibility of laser speckle contrast imaging (LSCI) for monitoring urethral blood flow (UBF). MATERIALS AND METHODS In this study, 18 healthy, virgin female Sprague-Dawley rats aged 8-week-old were used. The animals were divided into the sham group (n = 9) and the vaginal distension (VD) group (n = 9). The sham group underwent one catheterization of the vagina without distension and the VD group underwent one VD. Following the VD or sham treatment for one week, LSCI assessment of urethral blood flow was performed during bladder filling and leak point pressure (LPP) process. RESULTS During the LPP process, in the VD group, the mean LPP was significantly lower than in the sham group (p < 0.05) and the mean UBF level was also significantly lower than in the sham group (p < 0.05) in the LPP condition. The mean relative change of UBF (Δ Flow) was significantly different between the sham group and VD group. The value was 0.646 ± 0.229 and 0.295 ± 0.19, respectively (p < 0.05). During the bladder filling process, the VD group had a significant lower mean UBF level than the sham group under full bladder conditions (p = 0.008). The mean ΔFlow was also significantly lower than in the sham group. The value was 0.115 ± 0.121 and 0.375 ± 0.127, respectively (p = 0.016). CONCLUSIONS The results confirmed that LSCI was able to determine UBF in female rats. The VD group had lower baseline UBF and lower increases in UBF during bladder filling and LPP process compared with the sham group.
Collapse
Affiliation(s)
- Yu Cheng
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Kuerbanjiang Abulikim
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China; Department of Urology, The First People's Hospital of Kashi Prefecture, Kashi, PR China
| | - Tai-Cheng Li
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Xiao-Yu Wu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Xiao-Yi Yuan
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Guang-Hui Du
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Sheng-Fei Xu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China.
| |
Collapse
|
4
|
Liu Z, Tang Y, Liu J, Shi R, Houston M, Munoz A, Zhang Y, Li X. Platelet-rich Plasma Promotes Restoration of the Anterior Vaginal Wall for the Treatment of Pelvic Floor Dysfunction in Rats. J Minim Invasive Gynecol 2023; 30:45-51. [PMID: 36265834 DOI: 10.1016/j.jmig.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 10/11/2022] [Accepted: 10/11/2022] [Indexed: 11/18/2022]
Abstract
STUDY OBJECTIVE To determine the efficacy of using platelet-rich plasma (PRP) for vaginal wall repair in rats with vaginal wall impairment induced by vaginal distension (VD). DESIGN A single-blind, randomized study. SETTING A certified animal research facility. ANIMALS Twenty-four female Sprague Dawley rats. INTERVENTIONS Female Sprague Dawley rats were divided into sham (n = 8), VD (n = 8), and VD + PRP (n = 8) groups. Vaginal tissues from the VD group were dissected at 28-day post injury. VD + PRP rats received vaginal PRP injections on the 1st, 7th, 14th, and 21st day after VD and sacrificed on the 28th day. MEASUREMENTS AND MAIN RESULTS Urodynamic tests were performed in all rats. Immunohistochemistry was used to evaluate matrix metalloprotease-2 (MMP-2) and matrix metalloprotease-9 (MMP-9). Masson's staining was used to evaluate collagen fibers and calculate collagen volume fraction. Collagen fiber damage was confirmed in the VD group, evidenced by thinner and sparse distribution of collagen fibers, with significantly higher MMP-2 and MMP-9 expression than the sham group (p <.05). The collagen fiber damage in the vaginal wall likely led to pelvic floor dysfunction (PFD), evidenced by significantly decreased bladder leak-point pressure (p <.01) and abdominal leak-point pressure (p <.01) in the VD group compared with the sham group. After completion of the PRP treatment, a significantly higher collagen volume fraction (p <.01) and significantly increased bladder leak-point pressure (p <.05) and abdominal leak-point pressure (p <.01) were achieved in the VD + PRP compared with the VD group, thus indicating repair of the vaginal wall and improvement of PFD. CONCLUSION PRP injections facilitate the regeneration of vaginal wall tissue, particularly collagen fiber, after VD, leading to functional improvement of PFD. Findings support the feasibility of using PRP as a novel treatment for PFD.
Collapse
Affiliation(s)
- Zhaoxue Liu
- Department of Rehabilitation Medicine, The Third Xiangya Hospital, Central South University (MM. Liu, Drs. Tang, Liu, Shi, and Li), Changsha
| | - Yuan Tang
- Department of Rehabilitation Medicine, The Third Xiangya Hospital, Central South University (MM. Liu, Drs. Tang, Liu, Shi, and Li), Changsha; Department of Rehabilitation Medicine, The First People's Hospital of Changde City, Changde (Dr. Tang), China
| | - Jiaojiao Liu
- Department of Rehabilitation Medicine, The Third Xiangya Hospital, Central South University (MM. Liu, Drs. Tang, Liu, Shi, and Li), Changsha; Pelvic Floor and Postpartum Rehabilitation Center, Hospital for Maternal and Child Health Care (Dr. Liu), Changsha
| | - Ruting Shi
- Department of Rehabilitation Medicine, The Third Xiangya Hospital, Central South University (MM. Liu, Drs. Tang, Liu, Shi, and Li), Changsha
| | - Michael Houston
- Department of Biomedical Engineering, University of Houston, Houston, (MS. Houston and Dr. Zhang), Texas
| | - Alvaro Munoz
- Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, (Dr. Munoz), Jalisco, Mexico
| | - Yingchun Zhang
- Department of Biomedical Engineering, University of Houston, Houston, (MS. Houston and Dr. Zhang), Texas
| | - Xuhong Li
- Department of Rehabilitation Medicine, The Third Xiangya Hospital, Central South University (MM. Liu, Drs. Tang, Liu, Shi, and Li), Changsha.
| |
Collapse
|
5
|
Palacios JL, Luquin S, Quintanar JL, Munoz A. Continuous administration of leuprolide acetate improves urinary function in male rats with severe thoracic spinal cord injury. Life Sci 2022; 310:121113. [DOI: 10.1016/j.lfs.2022.121113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/23/2022] [Accepted: 10/17/2022] [Indexed: 11/09/2022]
|
6
|
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.
Collapse
|
7
|
Kong CW, To WWK. Use of balloon tamponade in management of vaginal laceration and its possible complication of urinary stress incontinence: a case report. BMC Pregnancy Childbirth 2020; 20:214. [PMID: 32293311 PMCID: PMC7161190 DOI: 10.1186/s12884-020-02885-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 03/20/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Postpartum haemorrhage from vaginal lacerations can occasionally be refractory to suturing and vaginal packing. Bakri uterine balloon has been widely adopted to stop uterine bleeding, but its use to stop bleeding in vaginal lacerations and its possible complications have seldom been reported. CASE PRESENTATION We report a patient who had vacuum delivery for fetal distress and subsequently had postpartum hemorrhage due to previous caesarean uterine scar rupture and multiple vaginal lacerations. The severe bleeding persisted despite total abdominal hysterectomy, pelvic embolization and vaginal gauze packing, but was finally controlled by a Bakri balloon tamponade inserted into the vagina. The patient suffered from severe stress incontinence after delivery. The possible use of balloon tamponade in vaginal lacerations and the different types of vaginal balloons that are available in the market for this purpose are reviewed. The possible causes leading to stress incontinence is reported to alert the obstetrician that such management is not free of complications. CONCLUSION The use of Bakri balloon can help to control bleeding in severe vaginal lacerations that are unresponsive to traditional vaginal gauze packing. Further studies are needed to evaluate the risks of stress incontinence as a possible complication of vaginal balloon tamponade.
Collapse
Affiliation(s)
- Choi Wah Kong
- Department of Obstetrics and Gynaecology, United Christian Hospital, 130 Hip Wo Street, Kwun Tong, Hong Kong SAR.
| | - William Wing Kee To
- Department of Obstetrics and Gynaecology, United Christian Hospital, 130 Hip Wo Street, Kwun Tong, Hong Kong SAR
| |
Collapse
|
8
|
Pape J, Falconi G, De Mattos Lourenco TR, Doumouchtsis SK, Betschart C. Variations in bladder pain syndrome/interstitial cystitis (IC) definitions, pathogenesis, diagnostics and treatment: a systematic review and evaluation of national and international guidelines. Int Urogynecol J 2019; 30:1795-1805. [PMID: 31073635 DOI: 10.1007/s00192-019-03970-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/22/2019] [Indexed: 12/30/2022]
Abstract
INTRODUCTION AND HYPOTHESIS Interstitial cystitis (IC) and bladder pain syndrome (BPS) are challenging and encompassing hypersensitivity disorders of the lower urinary tract. A variety of national and international guidelines have been published including guidance on nomenclature, definitions, etiopathology, diagnostics and treatment. A lack of universally established clinical guidance is apparent. The aim of this review is to evaluate key guidelines on this area of practice, identify variations, compare their recommendations and grade them using AGREE II. METHODS Literature searches were performed using the PUBMED and CINAHL database from January 1, 1983, to December 1, 2018, referring to the search strategy of AUA. Ten national and international guidelines were included into the analysis. We assessed the guidelines with the updated AGREE II. RESULTS Symptoms congruent in all guidelines are: pain, pressure, discomfort and frequency, urgency and nocturia. Urinalysis is a prerequisite for diagnostics, cystoscopy for most and urodynamics not part of the routine assessment. Treatment options are recommended stepwise. The highest level of evidence and consensus was identified for oral therapies. Nine guidelines had an overall quality score ≥ 50% and three scored ≥ 70% (AUA, GG, RCOG). CONCLUSIONS The guidelines are congruent in symptom reporting, quite congruent in diagnostics and vary to a high degree on treatment recommendations. The complexity of BPS and emerging evidence indicate the need for regular updating of the guidelines and a wider consensus.
Collapse
Affiliation(s)
- Janna Pape
- Department of Gynecology, University Hospital of Zurich, Frauenklinikstrasse 10, 8091, Zurich, Switzerland
| | - Gabriele Falconi
- Department of Obstetrics and Gynecology, "San Bortolo" Hospital, Vicenza, Italy
| | | | - Stergios K Doumouchtsis
- Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, London, UK.,St George's University of London, London, UK
| | - Cornelia Betschart
- Department of Gynecology, University Hospital of Zurich, Frauenklinikstrasse 10, 8091, Zurich, Switzerland.
| |
Collapse
|
9
|
Khalifa AO, Kavran M, Mahran A, Isali I, Woda J, Flask CA, Penn MS, Hijaz AK. Stromal derived factor-1 plasmid as a novel injection for treatment of stress urinary incontinence in a rat model. Int Urogynecol J 2019; 31:107-115. [PMID: 30666428 DOI: 10.1007/s00192-019-03867-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 01/02/2019] [Indexed: 12/23/2022]
Abstract
INTRODUCTION AND HYPOTHESIS SDF-1 chemokine enhances tissue regeneration through stem cell chemotaxis, neovascularization and neuronal regeneration. We hypothesized that non-viral delivery of human plasmids that express SDF-1 (pSDF-1) may represent a novel regenerative therapy for stress urinary incontinence (SUI). METHODS Seventy-six female rats underwent vaginal distention (VD). They were then divided into four groups according to treatment: pSDF-1 (n = 42), sham (n = 30), PBS (n = 1) and luciferase-tagged pSDF-1 (n = 3). Immediately after VD, the pSDF-1 group underwent immediate periurethral injection of pSDF-1, and the sham group received a vehicle injection followed by leak point pressure (LPP) measurement at the 4th, 7th and 14th days. Urogenital tissues were collected for histology. H&E and trichrome slides were analyzed for vascularity and collagen/muscle components of the sphincter. For the luciferase-tagged pSDF-1 group, bioluminescence scans (BLIs) were obtained on the 3rd, 7th and 14th days following injections. Statistical analysis was conducted using ANOVA with post hoc LSD tests. The Mann-Whitney U test was employed to make pair-wise comparisons between the treated and sham groups. We used IBM SPSS, version 22, for statistical analyses. RESULTS BLI showed high expression of luciferase-tagged pSDF-1 in the pelvic area over time. VD resulted in a decline of LPP at the 4th day in both groups. The pSDF1-treated group demonstrated accelerated recovery that was significantly higher than that of the sham-treated group at the 7th day (22.64 cmH2O versus 13.99 cmH2O, p < 0.001). Functional improvement persisted until the 14th day (30.51 cmH2O versus 24.11 cmH2O, p = 0.067). Vascularity density in the pSDF-1-treated group was higher than in the sham group at the 7th and 14th days (p < 0.05). The muscle density/sphincter area increased significantly from the 4th to 14th day only in the pSDF-1 group. CONCLUSIONS Periurethral injection of pSDF-1 after simulated childbirth accelerated the recovery of continence and regeneration of the urethral sphincter in a rat SUI model. This intervention can potentially be translated to the treatment of post-partum urinary incontinence.
Collapse
Affiliation(s)
- Ahmad O Khalifa
- Department of Urology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA.,Department of Urology, Menoufia University, Shibin El Kom, Egypt
| | - Michael Kavran
- Department of Urology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Amr Mahran
- Department of Urology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Ilaha Isali
- Department of Urology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | | | - Chris A Flask
- Departments of Radiology, Case Western Reserve University, Cleveland, OH, USA.,Departments of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA.,Departments of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Marc S Penn
- Summa Health Heart and Vascular Institute, Akron, OH, USA
| | - Adonis K Hijaz
- Department of Urology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA.
| |
Collapse
|
10
|
Jiang HH, Song QX, Gill BC, Balog BM, Juarez R, Cruz Y, Damaser MS. Electrical stimulation of the pudendal nerve promotes neuroregeneration and functional recovery from stress urinary incontinence in a rat model. Am J Physiol Renal Physiol 2018; 315:F1555-F1564. [PMID: 30132345 DOI: 10.1152/ajprenal.00431.2017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The pudendal nerve can be injured during vaginal delivery of children, and slowed pudendal nerve regeneration has been correlated with development of stress urinary incontinence (SUI). Simultaneous injury to the pudendal nerve and its target muscle, the external urethral sphincter (EUS), during delivery likely leads to slowed neuroregeneration. The goal of this study was to determine if repeat electrical stimulation of the pudendal nerve improves SUI recovery and promotes neuroregeneration in a dual muscle and nerve injury rat model of SUI. Rats received electrical stimulation or sham stimulation of the pudendal nerve twice weekly for up to 2 wk after injury. A separate cohort of rats received sham injury and sham stimulation. Expression of brain-derived neurotrophic factor (BDNF) and βII-tubulin expression in Onuf's nucleus were measured 2, 7, and 14 days after injury. Urodynamics, leak point pressure (LPP), and EUS electromyography (EMG) were recorded 14 days after injury. Electrical stimulation significantly increased expression of BDNF at all time points and βII-tubulin 1 and 2 wk after injury. Two weeks after injury, LPP and EUS EMG during voiding and LPP testing were significantly decreased compared with sham-injured animals. Electrical stimulation significantly increased EUS activity during voiding, although LPP did not fully recover. Repeat pudendal nerve stimulation promotes neuromuscular continence mechanism recovery possibly via a neuroregenerative response through BDNF upregulation in the pudendal motoneurons in this model of SUI. Electrical stimulation of the pudendal nerve may therefore improve recovery after childbirth and ameliorate symptoms of SUI by promoting neuroregeneration after injury.
Collapse
Affiliation(s)
- Hai-Hong Jiang
- Neuro-Urology Center, Department of Urology and Andrology, The First Affiliated Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,Glickman Urological and Kidney Institute, Cleveland Clinic , Cleveland, Ohio
| | - Qi-Xiang Song
- Department of Urology, Changhai Hospital, The Second Military Medical University , Shanghai , China.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio
| | - Bradley C Gill
- Glickman Urological and Kidney Institute, Cleveland Clinic , Cleveland, Ohio.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio
| | - Brian M Balog
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center , Cleveland, Ohio.,Department of Biology, University of Akron , Akron, Ohio
| | - Raul Juarez
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio.,Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala , Tlaxcala, Mexico
| | - Yolanda Cruz
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio.,Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala , Tlaxcala, Mexico
| | - Margot S Damaser
- Glickman Urological and Kidney Institute, Cleveland Clinic , Cleveland, Ohio.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio.,Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center , Cleveland, Ohio
| |
Collapse
|
11
|
Expression of Glial Cell Line-Derived Neurotrophic Factor (GDNF) and the GDNF Family Receptor Alpha Subunit 1 in the Paravaginal Ganglia of Nulliparous and Primiparous Rabbits. Int Neurourol J 2018; 22:S23-33. [PMID: 29385786 PMCID: PMC5798635 DOI: 10.5213/inj.1834974.487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/30/2017] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To evaluate the expression of glial cell line-derived neurotrophic factor (GDNF) and its receptor, GDNF family receptor alpha subunit 1 (GFRα-1) in the pelvic (middle third) vagina and, particularly, in the paravaginal ganglia of nulliparous and primiparous rabbits. METHODS Chinchilla-breed female rabbits were used. Primiparas were killed on postpartum day 3 and nulliparas upon reaching a similar age. The vaginal tracts were processed for histological analyses or frozen for Western blot assays. We measured the ganglionic area, the Abercrombie-corrected number of paravaginal neurons, the cross-sectional area of the neuronal somata, and the number of satellite glial cells (SGCs) per neuron. The relative expression of both GDNF and GFRα-1 were assessed by Western blotting, and the immunostaining was semiquantitated. Unpaired two-tailed Student t -test or Wilcoxon test was used to identify statistically significant differences (P≤0.05) between the groups. RESULTS Our findings demonstrated that the ganglionic area, neuronal soma size, Abercrombie-corrected number of neurons, and number of SGCs per neuron were similar in nulliparas and primiparas. The relative expression of both GDNF and GFRα-1 was similar. Immunostaining for both GDNF and GFRα-1 was observed in several vaginal layers, and no differences were detected regarding GDNF and GFRα-1 immunostaining between the 2 groups. In the paravaginal ganglia, the expression of GDNF was increased in neurons, while that of GFRα-1 was augmented in the SGCs of primiparous rabbits. CONCLUSIONS The present findings suggest an ongoing regenerative process related to the recovery of neuronal soma size in the paravaginal ganglia, in which GDNF and GFRα-1 could be involved in cross-talk between neurons and SGCs.
Collapse
|
12
|
Cruz Y, Lucio RA, Palacios JL. Neural and Endocrine Factors Contribute to the Comorbidity of Urinary and Sexual Dysfunctions. CURRENT SEXUAL HEALTH REPORTS 2017. [DOI: 10.1007/s11930-017-0129-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
Yoshikawa S, Sumino Y, Kwon J, Suzuki T, Kitta T, Miyazato M, Yoshimura N. Effects of multiple simulated birth traumas on urethral continence function in rats. Am J Physiol Renal Physiol 2017; 313:F1089-F1096. [PMID: 28768663 DOI: 10.1152/ajprenal.00230.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/17/2017] [Accepted: 07/25/2017] [Indexed: 11/22/2022] Open
Abstract
Multiple vaginal parities have been reported to be an important risk factor for stress urinary incontinence (SUI). Simulated birth trauma with single vaginal distention (VD) has been used to induce the SUI condition in animals; however, the effect of multiple simulated birth traumas on the urethral continence function has not been well characterized. Therefore, we examined the effects of multiple VDs on urethral functions in vivo and the changes in gene expressions of several molecules in the urethra using female SD rats, which were divided into three groups; sham, VD-1 (single VD), and VD-3 groups (3 times of VDs every 2 wk). Two weeks after the final VD, leak point pressure (LPP) and urethral responses during sneezing were evaluated. Also, changes in mRNA levels of urethral molecules were quantified with RT-PCR. The VD-1 group did not show any change in LPP with only a tendency of decrease in amplitudes of the urethral responses during sneezing (A-URS); however, the VD-3 group showed a significant decrease in LPP and urethral responses such as baseline urethral pressure and A-URS accompanied with SUI episodes during sneezing. Nicotinic receptor subtypes and transforming growth factor (TGF)-β1 were significantly increased in both VD-1 and VD-3 groups while TNF receptor (TNFR)-1, IL-6, collagens, and matrix metalloproteinases-9 were significantly increased only in the VD-3 group. These data indicate that rats with multiple simulated birth traumas exhibit profound impairment of the urethral continence function and that these functional changes are associated with those in cytokines, extracellular matrix molecules, and nicotinic receptor subtypes in the urethra.
Collapse
Affiliation(s)
- Satoru Yoshikawa
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and
| | - Yasuhiro Sumino
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and
| | - Joonbeom Kwon
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and
| | - Takahisa Suzuki
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and
| | - Takeya Kitta
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and
| | - Minoru Miyazato
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and
| | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania; and .,Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
| |
Collapse
|
14
|
Role of Estrogens in the Size of Neuronal Somata of Paravaginal Ganglia in Ovariectomized Rabbits. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2089645. [PMID: 28316975 PMCID: PMC5339489 DOI: 10.1155/2017/2089645] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 12/18/2016] [Accepted: 01/15/2017] [Indexed: 01/07/2023]
Abstract
We aimed to determine the role of estrogens in modulating the size of neuronal somata of paravaginal ganglia. Rabbits were allocated into control (C), ovariectomized (OVX), and OVX treated with estradiol benzoate (OVX + EB) groups to evaluate the neuronal soma area; total serum estradiol (E2) and testosterone (T) levels; the percentage of immunoreactive (ir) neurons anti-aromatase, anti-estrogen receptor (ERα, ERβ) and anti-androgen receptor (AR); the intensity of the immunostaining anti-glial cell line-derived neurotrophic factor (GDNF) and the GDNF family receptor alpha type 1 (GFRα1); and the number of satellite glial cells (SGCs) per neuron. There was a decrease in the neuronal soma size for the OVX group, which was associated with low T, high percentages of aromatase-ir and neuritic AR-ir neurons, and a strong immunostaining anti-GDNF and anti-GFRα1. The decrease in the neuronal soma size was prevented by the EB treatment that increased the E2 without affecting the T levels. Moreover, there was a high percentage of neuritic AR-ir neurons, a strong GDNF immunostaining in the SGC, and an increase in the SGCs per neuron. Present findings show that estrogens modulate the soma size of neurons of the paravaginal ganglia, likely involving the participation of the SGC.
Collapse
|