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Detrusor muscle

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https://www.readbyqxmd.com/read/28049497/two-differentially-structured-collagen-scaffolds-for-potential-urinary-bladder-augmentation-proof-of-concept-study-in-a-g%C3%A3-ttingen-minipig-model
#1
Dorothea Leonhäuser, Katja Stollenwerk, Volker Seifarth, Isabella M Zraik, Michael Vogt, Pramod K Srinivasan, Rene H Tolba, Joachim O Grosse
BACKGROUND: The repair of urinary bladder tissue is a necessity for tissue loss due to cancer, trauma, or congenital abnormalities. Use of intestinal tissue is still the gold standard in the urological clinic, which leads to new problems and dysfunctions like mucus production, stone formation, and finally malignancies. Therefore, the use of artificial, biologically derived materials is a promising step towards the augmentation of this specialised tissue. The aim of this study was to investigate potential bladder wall repair by two collagen scaffold prototypes, OptiMaix 2D and 3D, naïve and seeded with autologous vesical cells, as potential bladder wall substitute material in a large animal model...
January 4, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28040358/bladder-endometriosis-a-systematic-review-of-pathogenesis-diagnosis-treatment-impact-on-fertility-and-risk-of-malignant-transformation
#2
REVIEW
Umberto Leone Roberti Maggiore, Simone Ferrero, Massimo Candiani, Edgardo Somigliana, Paola Viganò, Paolo Vercellini
CONTEXT: The bladder is the most common site affected in urinary tract endometriosis. There is controversy regarding the pathogenesis, clinical management (diagnosis and treatment), impact on fertility, and risk of malignant transformation of bladder endometriosis (BE). OBJECTIVE: To systematically evaluate evidence regarding the pathogenesis, diagnosis, medical and surgical treatment, impact on female fertility, and risk of malignant transformation of BE. EVIDENCE ACQUISITION: A systematic review of PubMed/Medline from inception until October 2016 was performed in accordance with the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) statement and was registered in the PROSPERO registry (www...
December 28, 2016: European Urology
https://www.readbyqxmd.com/read/28025660/low-amplitude-rhythmic-contraction-frequency-in-human-detrusor-strips-correlates-with-phasic-intravesical-pressure-waves
#3
Andrew F Colhoun, John E Speich, Lauren F Cooley, Eugene D Bell, R Wayne Barbee, Georgi Guruli, Paul H Ratz, Adam P Klausner
PURPOSE: Low amplitude rhythmic contractions (LARC) occur in detrusor smooth muscle and may play a role in storage disorders such as overactive bladder and detrusor overactivity. The purpose of this study was to determine whether LARC frequencies identified in vitro from strips of human urinary bladder tissue correlate with in vivo LARC frequencies, visualized as phasic intravesical pressure (p ves) waves during urodynamics (UD). METHODS: After IRB approval, fresh strips of human urinary bladder were obtained from patients...
December 26, 2016: World Journal of Urology
https://www.readbyqxmd.com/read/27999934/detrusor-pressures-in-urodynamic-studies-during-voiding-in-women
#4
Satoru Kira, Takahiko Mitsui, Hideki Kobayashi, Yaburu Haneda, Norifumi Sawada, Masayuki Takeda
INTRODUCTION AND HYPOTHESIS: To investigate detrusor pressure during voiding in women using urodynamic studies (UDS). METHODS: The study group comprised 57 women with non-neurogenic lower urinary tract symptoms. All patients underwent UDS between January 2010 and December 2014. UDS included filling cystometry, pressure flow study (PFS), uroflowmetry for the maximum flow rate (Qmax) and mean flow rate, and postvoid residuals. Existence of voluntary detrusor contraction was defined as a continuous and smooth increase in detrusor pressure (Pdet) after the instruction to micturate in the PFS...
December 20, 2016: International Urogynecology Journal
https://www.readbyqxmd.com/read/27995963/histone-deacetylase-inhibitors-mediate-dna-damage-repair-in-ameliorating-hemorrhagic-cystitis
#5
Subhash Haldar, Christopher Dru, Rajeev Mishra, Manisha Tripathi, Frank Duong, Bryan Angara, Ana Fernandez, Moshe Arditi, Neil A Bhowmick
Hemorrhagic cystitis is an inflammatory and ulcerative bladder condition associated with systemic chemotherapeutics, like cyclophosphomide. Earlier, we reported reactive oxygen species resulting from cyclophosphamide metabolite, acrolein, causes global methylation followed by silencing of DNA damage repair genes. Ogg1 (8-oxoguanine DNA glycosylase) is one such silenced base excision repair enzyme that can restore DNA integrity. The accumulation of DNA damage results in subsequent inflammation associated with pyroptotic death of bladder smooth muscle cells...
December 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27987021/impaired-contraction-and-decreased-detrusor-innervation-in-a-female-rat-model-of-pelvic-neuropraxia
#6
Johanna L Hannan, Shelby A Powers, Vinson M Wang, Fabio Castiglione, Petter Hedlund, Trinity J Bivalacqua
INTRODUCTION AND HYPOTHESIS: Bilateral pelvic nerve injury (BPNI) is a model of post-radical hysterectomy neuropraxia, a common sequela. This study assessed the time course of changes to detrusor autonomic innervation, smooth muscle (SM) content and cholinergic-mediated contraction post-BPNI. METHODS: Female Sprague-Dawley rats underwent BPNI or sham surgery and were evaluated 3, 7, 14, and 30 days post-BPNI (n = 8/group). Electrical field-stimulated (EFS) and carbachol-induced contractions were measured...
December 16, 2016: International Urogynecology Journal
https://www.readbyqxmd.com/read/27965369/pharmacological-characterization-of-a-novel-beta3-adrenergic-agonist-vibegron-evaluation-of-anti-muscarinic-receptor-selectivity-for-optimal-combination-therapy-for-overactive-bladder
#7
Jerry Di Salvo, Hiroshi Nagabukuro, Alexandra Wickham, Catherine Abbadie, Julie A DeMartino, Aileen Fitzmaurice, Loise Gichuru, Alison Kulick, Marcie J Donnelly, Nina Jochnowitz, Amanda Hurley, Antonio Pereira, Anthony Sanfiz, Gregory Veronin, Katherine Villa, John Woods, Beata Zamlynny, Emanuel Zycband, Gino M Salituro, Tara Frenkl, Ann E Weber, Scott D Edmondson, Mary Struthers
Although the physiological role of muscarinic receptors in bladder function and the therapeutic efficacy of muscarinic antagonists for the treatment of overactive bladder are well established, the role of β3-adrenergic receptors (β3ARs) and their potential as therapeutics is just emerging. In this manuscript, we characterized the pharmacology of a novel β3AR agonist vibegron (MK-4618, KRP-114V) and explored mechanistic interactions of β3AR agonism and muscarinic antagonism in urinary bladder function. Vibegron is a potent, selective full β3AR agonist across species and it dose-dependently increased bladder capacity, decreased micturition pressure and increased bladder compliance in rhesus monkeys...
December 13, 2016: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/27960535/en-bloc-transurethral-resection-of-bladder-tumors-a-new-standard
#8
Angelo Naselli, Paolo Puppo
OBJECTIVE: To assess safety and efficacy, namely pathological assessment of the specimen and recurrence rate, of en bloc transurethral resection (EBTUR) of bladder tumor. MATERIALS AND METHODS: We performed a systematic review of the available literature on PubMed. Seventeen articles, mainly prospective case series, were found. EBTUR is performed with a great variety of equipments, whereas the resection technique is similar. RESULTS: Overall, 895 patients have been submitted to EBTUR, accounting for 1191 lesions...
January 16, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/27935011/electrical-stimulation-with-non-implanted-electrodes-for-overactive-bladder-in-adults
#9
REVIEW
Fiona Stewart, Luis F Gameiro, Regina El Dib, Monica O Gameiro, Anil Kapoor, Joao L Amaro
BACKGROUND: Several options exist for managing overactive bladder (OAB), including electrical stimulation (ES) with non-implanted devices, conservative treatment and drugs. Electrical stimulation with non-implanted devices aims to inhibit contractions of the detrusor muscle, potentially reducing urinary frequency and urgency. OBJECTIVES: To assess the effects of ES with non-implanted electrodes for OAB, with or without urgency urinary incontinence, compared with: placebo or any other active treatment; ES added to another intervention compared with the other intervention alone; different methods of ES compared with each other...
December 9, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27905300/intravital-imaging-of-mouse-urothelium-reveals-activation-of-extracellular-signal-regulated-kinase-by-stretch-induced-intravesical-release-of-atp
#10
Takeshi Sano, Takashi Kobayashi, Hiromitsu Negoro, Atsushi Sengiku, Takuya Hiratsuka, Yuji Kamioka, Louis S Liou, Osamu Ogawa, Michiyuki Matsuda
To better understand the roles played by signaling molecules in the bladder, we established a protocol of intravital imaging of the bladder of mice expressing a Förster/fluorescence resonance energy transfer (FRET) biosensor for extracellular signal-regulated kinase (ERK), which plays critical roles not only in cell growth but also stress responses. With an upright two-photon excitation microscope and a vacuum-stabilized imaging window, cellular ERK activity was visualized in the whole bladder wall, from adventitia to urothelium...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27882470/comparison-of-detrusor-muscle-sampling-rate-in-monopolar-and-bipolar-transurethral-resection-of-bladder-tumor-a-randomized-trial
#11
Jeremy Yuen-Chun Teoh, Eddie Shu-Yin Chan, Siu-Ying Yip, Ho-Man Tam, Peter Ka-Fung Chiu, Chi-Hang Yee, Hon-Ming Wong, Chi-Kwok Chan, Simon See-Ming Hou, Chi-Fai Ng
PURPOSE: Our aim was to investigate the detrusor muscle sampling rate after monopolar versus bipolar transurethral resection of bladder tumor (TURBT). METHODS: This was a single-center, prospective, randomized, phase III trial on monopolar versus bipolar TURBT. Baseline patient characteristics, disease characteristics and perioperative outcomes were compared, with the primary outcome being the detrusor muscle sampling rate in the TURBT specimen. Multivariate logistic regression analyses on detrusor muscle sampling were performed...
November 23, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27844406/partial-bladder-outlet-obstruction-is-associated-with-decreased-expression-and-function-of-the-small-conductance-ca-2-activated-k-channel-in-guinea-pig-detrusor-smooth-muscle
#12
Ning Li, Xiaoning He, Zizheng Li, Yili Liu, Ping Wang
PURPOSE: Partial bladder outlet obstruction (PBOO) usually induces overactive bladder (OAB) associated with detrusor overactivity (DO) which is related to the increased contractility of detrusor smooth muscle (DSM). The pharmacological activation of small-conductance Ca(2+)-activated K(+) (SK) channels dramatically attenuates DSM contractility. However, the role of SK channels in the PBOO DSM is less clear. Here, we tested the hypothesis that PBOO is associated with decreased expression and function of SK channels in DSM and that the activation of SK channels is a potential target to regulate DO...
November 14, 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27798943/effects-of-distigmine-on-electrical-field-stimulation-induced-contraction-of-mouse-urinary-bladder-smooth-muscles
#13
Keisuke Obara, Yurina Kobayashi, Daisuke Chino, Yoshio Tanaka
Distigmine bromide (distigmine), a reversible carbamate cholinesterase inhibitor, is used in Japan for treating detrusor underactivity, myasthenia gravis, and glaucoma. Although there is clinical evidence about the effectiveness of distigmine in the treatment of detrusor underactivity, mechanisms by which distigmine restores impaired urinary bladder smooth muscle (UBSM) contractility have not been fully investigated. The aims of this study were to investigate the potentiating effects of distigmine on UBSM contractions in response to parasympathetic nerve stimulation induced by electrical field stimulation (EFS) in mice...
November 1, 2016: Pharmacology
https://www.readbyqxmd.com/read/27794199/long-term-treatment-with-the-beta-3-adrenoceptor-agonist-mirabegron-ameliorates-detrusor-overactivity-and-restores-cyclic-adenosine-monophosphate-camp-levels-in-obese-mice
#14
Fabiano B Calmasini, Mariana G de Oliveira, Eduardo C Alexandre, Fábio H da Silva, Carmem P V da Silva, Tuany Z Candido, Edson Antunes, Fabíola Z Mónica
AIMS: To evaluate the effects of the beta-3 adrenoceptor agonist, mirabegron in a mouse model of detrusor overactivity induced by obesity. METHODS: C57BL/6 male mice were fed with standard chow or high-fat diet for 12 weeks. Lean and obese mice were treated orally with mirabegron (10 mg/kg/day) from the last 2 weeks of diet. Cystometric evaluations, functional assays, protein expression for phosphodiesterase type 4 (PDE4), and cyclic adenosine monophosphate (cAMP) measurement were carried out...
October 29, 2016: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/27777947/expansion-of-submucosal-bladder-wall-tissue-in-vitro-and-in-vivo
#15
Gisela Reinfeldt Engberg, Clara Ibel Chamorro, Agneta Nordenskjöld, Magdalena Fossum
In order to develop autologous tissue engineering of the whole wall in the urinary excretory system, we studied the regenerative capacity of the muscular bladder wall. Smooth muscle cell expansion on minced detrusor muscle in vitro and in vivo with or without urothelial tissue was studied. Porcine minced detrusor muscle and urothelium were cultured in vitro under standard culture conditions for evaluation of the explant technique and in collagen for tissue sectioning and histology. Autografts of minced detrusor muscle with or without minced urothelium were expanded on 3D cylinder moulds by grafting into the subcutaneous fat of the pig abdominal wall...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27761601/kv7-channels-in-the-human-detrusor-channel-modulator-effects-and-gene-and-protein-expression
#16
Riccardo Bientinesi, Cesare Mancuso, Maria Martire, Pier Francesco Bassi, Emilio Sacco, Diego Currò
Voltage-gated type 7 K(+) (KV7 or KCNQ) channels regulate the contractility of various smooth muscles. With this study, we aimed to assess the role of KV7 channels in the regulation of human detrusor contractility, as well as the gene and protein expression of KV7 channels in this tissue. For these purposes, the isolated organ technique, RT-qPCR, and Western blot were used, respectively. XE-991, a selective KV7 channel blocker, concentration-dependently contracted the human detrusor; mean EC50 and Emax of XE-991-induced concentration-response curve were 14...
October 19, 2016: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/27738973/octodon-degus-a-new-model-to-study-the-agonist-and-plexus-induced-response-in-the-urinary-bladder
#17
Francisco Eduardo Martin-Cano, Mercedes Caso-Agundez, Cristina Camello-Almaraz, Francisco Juan Santos, María Teresa Espin, Juan Antonio Madrid, Adolfo Diez-Perez, Pedro Javier Camello, Maria Jose Pozo
Urinary bladder function consists in the storage and controlled voiding of urine. Translational studies require animal models that match human characteristics, such as Octodon degus, a diurnal rodent. This study aims to characterize the contractility of the detrusor muscle and the morphology and code of the vesical plexus from O. degus. Body temperature was measured by an intra-abdominal sensor, the contractility of detrusor strips was evaluated by isometric tension recording, and the vesical plexus was studied by electrical field stimulation (EFS) and immunofluorescence...
October 13, 2016: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/27709382/effect-of-doxazosin-on-autonomic-nervous-control-and-urodynamics-of-rat-urinary-bladder-during-modeled-infravesical-obstruction
#18
V I Kirpatovskii, I S Mudraya, S V Revenko, A Yu Bablumyan, N K Adamyan, V P Ivanov
The therapeutic effect of doxazosin (40 μg/kg/day over one month) on urinary bladder was examined in female rats with modeled chronic infravesical obstruction (IVO) produced by graduated mechanical constriction of the proximal urethral segment. In one month, IVO induced a pronounced vesical hypertrophy both in treated and untreated rats that manifested in increased bladder weight and capacity, the latter increment being pronouncedly greater in treated rats. In untreated IVO rats, infusion cystometry revealed elevated basal intravesical pressure of void bladder P0, markedly increased maximal (premicturitional) pressure Pmax, and increased amplitude of spontaneous oscillations of intravesical pressure ΔPdet in filled bladder...
September 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27695622/mirabegron-in-overactive-bladder-patients-efficacy-review-and-update-on-drug-safety
#19
Katherine Warren, Helena Burden, Paul Abrams
Overactive bladder is a common condition, which significantly affects people's quality of life. The use of anticholinergic medication has been the mainstay of managing overactive bladder when conservative measures are not enough. Many patients stop anticholinergic medication because of the side effects and more recently the concerns about the effect of an anticholinergic burden and the development of dementia have been studied. Activation of β3 adrenoceptors has been shown to relax the detrusor muscle and subsequently lead to the development of the first β3 adrenoceptor agonist...
October 2016: Therapeutic Advances in Drug Safety
https://www.readbyqxmd.com/read/27676715/bladder-rupture-secondary-to-emphysematous-bladder-a-diabetic-patient-report
#20
Astrid Balança
OBJECTIVE: We report an emphysematous cystitis in a diabetic patient complicated by peritonitis. OBSERVATIONS: A 66-year-old male presented to the emergency with septic shock. Patient's history: poorly controlled diabetes and prostate adenoma. Clinical examination revealed a surgical abdomen and signs of shock. Blood sugar was 6g/L. CRP 274mg/L. The abdomino-pelvic CT scan showed a perforated bladder with emphysema of the bladder wall and endoluminal air bubbles...
September 2016: Annals of Physical and Rehabilitation Medicine
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