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Imamura T, Ogawa T, Minagawa T, Daimon H, Nagai T, Ueno M, Saito T, Ishizuka O. Transient receptor potential ankyrin 1 channels in the bladder mediate low temperature elicited bladder overactivity in rats. Neurourol Urodyn 2024; 43:276-288. [PMID: 38010891 DOI: 10.1002/nau.25335] [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: 06/21/2023] [Revised: 10/13/2023] [Accepted: 11/08/2023] [Indexed: 11/29/2023]
Abstract
AIMS This study aimed to investigate whether pathways involving transient receptor potential ankyrin 1 (TRPA1) channels in the urinary bladder mediate the bladder overactivity elicited by exposure to a low temperature in rats. METHODS At postnatal week 10, female Sprague-Dawley (SD) rats were intraperitoneally injected with the TRPA1 channel antagonist, HC030031, at room temperature (RT) and subsequently exposed to low temperature (LT). Bladder specimens treated with HC030031 were evaluated for contractions through cumulative addition of the TRPA1 channel agonist trans-cinnamaldehyde. Two days before cystometric investigation, small interfering RNA (siRNA) targeting TRPA1 was transfected into urinary bladders. Then, cystometric investigations were performed on rats subjected to TRPA1 siRNA transfection at both RT and LT. Expression of TRPA1 channels in the urinary bladder was assessed through immunohistochemistry and real-time reverse transcription-polymerase chain reaction. RESULTS At RT, micturition patterns were unaffected by HC030031 treatment. However, upon exposure to LT, rats treated with HC030031 exhibited a reduction of LT-elicited bladder overactivity, as evidenced by inhibited decreases in voiding interval, micturition volume, and bladder capacity. Additionally, HC030031 inhibited trans-cinnamaldehyde-induced contractions. Immunohistochemical analysis showed the presence of TRPA1 channels in the urinary bladder. Notably, rats with TRPA1 siRNA-transfected bladders could partially inhibit bladder overactivity during LT exposure. CONCLUSIONS These findings indicate that pathways involving TRPA1 channels expressed in the urinary bladder could mediate the LT-elicited bladder overactivity.
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Affiliation(s)
- Tetsuya Imamura
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Teruyuki Ogawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Tomonori Minagawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Hironori Daimon
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Takashi Nagai
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Manabu Ueno
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Tetsuichi Saito
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Osamu Ishizuka
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
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Sun M, Li S, Sun X, Deng Z, Xu Y. Association between winter season and desmopressin treatment efficiency in children with monosymptomatic nocturnal enuresis: a pilot study. Int Braz J Urol 2022; 48:275-281. [PMID: 35170888 PMCID: PMC8932042 DOI: 10.1590/s1677-5538.ibju.2021.0236] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 11/22/2021] [Indexed: 01/25/2023] Open
Abstract
Objectives: The purpose of our study was to assess the association between the winter season and desmopressin treatment failure in South Chinese children with monosymptomatic nocturnal enuresis (MNE). Materials and Methods: A retrospective study was conducted to analyze the clinical data of children with monosymptomatic nocturnal enuresis who have visited our urology clinic from January to December 2019. All patients received desmopressin treatment. Final treatment outcomes were categorized as successful (complete response) or failed (absent and partial response). The relationship between winter season and treatment response to desmopressin was evaluated. Additionally, associated risk factors were investigated with both univariate and multivariate regression analysis. Results: In total, 393 patients diagnosed with MNE were included in the present study. There were no statistically significant differences in pretreatment variables at first visit between patients who visited the clinic in winter and those who did so in other seasons. However, the treatment failure rate of MNE in the winter season was higher than that of other seasons (77.50% vs. 52.74%). Multivariate logistic regression analysis demonstrated that the severity of symptoms and an initial clinic visit in the winter season were significantly related to desmopressin treatment failure in MNE patients. Conclusion: Winter season and severity of symptoms are two risk factors associated with desmopressin treatment failure in MNE patients.
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Affiliation(s)
- Mengkui Sun
- Shenzhen Children's Hospital, Department of Urology, Shenzhen, China
| | - Shoulin Li
- Shenzhen Children's Hospital, Department of Urology, Shenzhen, China
| | - Xuerui Sun
- Shenzhen Children's Hospital, Department of Urology, Shenzhen, China
| | - Zhimei Deng
- Shenzhen Children's Hospital, Department of Urology, Shenzhen, China
| | - Yanan Xu
- Shenzhen Children's Hospital, Department of Urology, Shenzhen, China
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Uta D, Hattori T, Yoshimura M. Analyses of the Mode of Action of an Alpha-Adrenoceptor Blocker in Substantia Gelatinosa Neurons in Rats. Int J Mol Sci 2021; 22:9636. [PMID: 34502543 PMCID: PMC8431806 DOI: 10.3390/ijms22179636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/24/2021] [Accepted: 09/03/2021] [Indexed: 11/17/2022] Open
Abstract
To elucidate why naftopidil increases the frequency of spontaneous synaptic currents in only some substantia gelatinosa (SG) neurons, post-hoc analyses were performed. Blind patch-clamp recording was performed using slice preparations of SG neurons from the spinal cords of adult rats. Spontaneous inhibitory and excitatory postsynaptic currents (sIPSCs and sEPSCs, respectively) were recorded. The ratios of the frequency and amplitude of the sIPSCs and sEPSCs following the introduction of naftopidil compared with baseline, and after the application of naftopidil, serotonin (5-HT), and prazosin, compared with noradrenaline (NA) were evaluated. First, the sIPSC analysis indicated that SG neurons reached their full response ratio for NA at 50 μM. Second, they responded to 5-HT (50 μM) with a response ratio similar to that for NA, but prazosin (10 μM) did not change the sEPSCs and sIPSCs. Third, the highest concentration of naftopidil (100 μM) led to two types of response in the SG neurons, which corresponded with the reactions to 5-HT and prazosin. These results indicate that not all neurons were necessarily activated by naftopidil, and that the micturition reflex may be regulated in a sophisticated manner by inhibitory mechanisms in these interneurons.
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Affiliation(s)
- Daisuke Uta
- Department of Applied Pharmacology, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Tsuyoshi Hattori
- Department of Medical Affairs, Asahi Kasei Pharma Corporation, Tokyo 100-0006, Japan
| | - Megumu Yoshimura
- Department of Orthopedic Surgery, Nakamura Hospital, Fukuoka 822-0002, Japan;
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Kitta T, Chiba H, Kanno-Kakibuchi Y, Hattori T, Higuchi M, Ouchi M, Togo M, Abe-Takahashi Y, Michishita M, Kitano T, Shinohara N. Long-term administration of alpha-1 blocker can reverse the micturition pattern in a bladder outlet obstruction murine model. Int J Urol 2020; 27:1150-1156. [PMID: 32985003 DOI: 10.1111/iju.14377] [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: 06/26/2020] [Accepted: 08/24/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To investigate the effect of chronic administration of an alpha-1 blocker on micturition patterns in long-term partial bladder outlet obstruction. METHODS Mice were divided into three groups: a normal group, in which animals were fed a standard diet; a partial bladder outlet obstruction group, in which the proximal urethra was tied and animals were fed a standard diet; and a partial bladder outlet obstruction + naftopidil group, in which the proximal urethra was tied and animals were fed a standard diet containing naftopidil. Micturition behavior was evaluated in all groups for 6 months after partial bladder outlet obstruction surgery. The parameters evaluated included voided volume, time per void, urination frequency and total urine volume. Quantitative assessment of gene expression was also carried out. RESULTS Total urine volume, as well as total and average voided volume during night, was significantly decreased in partial bladder outlet obstruction + naftopidil mice compared with partial bladder outlet obstruction animals. The levels of transcripts encoding 5-hydroxytryptamine 2A and tissue inhibitor of metalloproteinase 2 were significantly decreased in the partial bladder outlet obstruction + naftopidil group compared with the partial bladder outlet obstruction group. CONCLUSIONS Long-term administration of an alpha-1 blocker seems to reverse the disturbance of the micturition pattern caused by partial bladder outlet obstruction. Mechanistically, this effect might be mediated by changes in the expression of a serotonin receptor and/or in the activity of the fibrogenesis pathway.
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Affiliation(s)
- Takeya Kitta
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Hiroki Chiba
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yukiko Kanno-Kakibuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tsuyoshi Hattori
- Department of Medical Affairs, Asahi Kasei Pharma Corporation, Tokyo, Japan
| | - Madoka Higuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mifuka Ouchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mio Togo
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yui Abe-Takahashi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mai Michishita
- Laboratory for Pharmacology, Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Tokyo, Japan
| | - Tatsuya Kitano
- Laboratory for Pharmacology, Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Tokyo, Japan
| | - Nobuo Shinohara
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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Differential Effects of Alpha 1-Adrenoceptor Antagonists on the Postsynaptic Sensitivity: Using Slice Patch-Clamp Technique for Inhibitory Postsynaptic Current in Substantia Gelatinosa Neurons From Lumbosacral Spinal Cord in Rats. Int Neurourol J 2020; 24:127-134. [PMID: 32615674 PMCID: PMC7332814 DOI: 10.5213/inj.1938248.124] [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: 12/18/2019] [Accepted: 03/30/2020] [Indexed: 12/31/2022] Open
Abstract
PURPOSE Alpha1-adrenoceptors participate in improving storage symptoms of male lower urinary tract symptoms. However, the mechanism of action of these compounds remains unclear. The goal of the present study was to clarify the effect of α1- adrenoceptor antagonists on γ-aminobutyric acid (GABA)/glycine-mediated outward currents of the inhibitory postsynaptic current (IPSC) in substantia gelatinosa (SG) neurons from the lumbosacral spinal cord in rats. METHODS Male adult Sprague-Dawley rats were used. Blind whole-cell patch-clamp recordings were performed in SG neurons from isolated spinal cord slice preparations. IPSCs were recorded in individual SG neurons to which naftopidil (100μM), tamsulosin (100μM), silodosin (30μM), or prazosin (10μM) were applied sequentially with intervening washout periods. Strychnine (2μM), bicuculline (10μM), or tetrodotoxin (TTX)(1μM) were added before naftopidil. Individual outward currents were analyzed. RESULTS The bath application of naftopidil, yielded outward IPSCs in 13 of 52 SG neurons. The naftopidil response was unchanged in the presence of TTX. Regression analysis of the outward currents between the 1st and 2nd applications of naftopidil revealed a Pearson correlation coefficient of 0.996 with a line slope of 0.983. The naftopidil-induced outward current was attenuated in the presence of strychnine and/or bicuculline. The GABA/glycine-mediated outward currents induced by tamsulosin, silodosin, and prazosin were smaller than those obtained with naftopidil. CONCLUSION Naftopidil-induced GABA/glycine-mediated outward currents in a subset of SG neurons prepared from the L6- S1 level of rat spinal cord. The results indicated that α1-adrenoceptor antagonists, particularly naftopidil, induce neural suppression (in part) by mediating hyperpolarization. The response is associated with glycinergic and/or GABAergic neural transmission. Naftopidil may suppress the micturition reflex and improve urinary storage symptoms as a subsidiary effect resulting from hyperpolarization in SG neurons of the spinal cord.
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Effect of Alpha 1-Adrnoceptor Antagonists on Postsynaptic Sensitivity in Substantia Gelatinosa Neurons From Lumbosacral Spinal Cord in Rats Using Slice Patch-Clamp Technique for mEPSC. Int Neurourol J 2020; 24:135-143. [PMID: 32615675 PMCID: PMC7332821 DOI: 10.5213/inj.1938250.125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 02/18/2020] [Indexed: 02/02/2023] Open
Abstract
Purpose Alpha1-adrenoceptors participate in improving storage symptoms of male lower urinary tract symptoms (LUTS). However, the mechanism of action of these compounds remains unclear. To clarify the mechanism of the α1-adrenoceptor antagonists, the amplitude of miniature excitatory postsynaptic currents (mEPSCs) was analyzed in the lumbosacral spinal cord in rats. Methods Male adult Sprague-Dawley rats were used. Blind whole-cell patch-clamp recordings were performed on substantia gelatinosa (SG) neurons in spinal cord slice preparations. The amplitude of mEPSCs was recorded in individual SG neurons to which α1-adrenoceptors (100μM naftopidil, 100μM tamsulosin, and 30μM silodosin) were applied sequentially with intervening washout periods. Individual amplitudes were analyzed. Results Pearson correlation coefficients (r) for the amplitudes of mEPSCs between the baseline and postadministration of α1-adrenoceptor antagonists indicated changes of the amplitude ranked in the order of naftopidil (r =0.393), tamsulosin (r=0.738), and silodosin (r=0.944). Together, the α1-adrenoceptor antagonists yielded significant increases in the amplitude of mEPSCs in SG neurons (n=108, P=0.012). However, the effects of each α1-adrenoceptor antagonist on the amplitude were as follows (relative to the baseline; n=36 each): naftopidil, P=0.129; tamsulosin, P=0.201; and silodosin, P=0.005. The rate of response to naftopidil for the outward current was relatively high among the α1-adrenoceptor blockers. An inward current was observed only with the naftopidil application. Conclusions Alpha1-adrenoceptor antagonists changed the amplitudes of mEPSCs in a subset of SG neurons in slices prepared from the L6–S1 levels of rat spine. Although the α1-adrenoceptor antagonists generated inward or outward currents in the SG neurons, different rates of response were observed with each antagonist. These results are important for understanding the mechanisms of action (at the spinal level) of α1-adrenoceptor antagonists for the storage symptoms of male LUTS.
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Emotional Stress Facilitates Micturition Reflex: Possible Inhibition by an α1-Adrenoceptor Blocker in the Conscious and Anesthetized State. Int Neurourol J 2019; 23:100-108. [PMID: 31260609 PMCID: PMC6606938 DOI: 10.5213/inj.1836284.142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 03/27/2019] [Indexed: 12/28/2022] Open
Abstract
Purpose To test the hypothesis that naftopidil prolongs intercontraction intervals in rats undergoing chronic stress as observed in previous animal models, voiding behavior and bladder function were measured and analyzed. Methods Female Sprague-Dawley rats weighing 200–230 g were exposed to repeated variate stress (RVS) for 1 week, chronic variable mild stress for 2 weeks, or simple mild stress for 1 week. Voiding behavior was assessed in metabolic cages. Voiding frequency and urine output were measured, and changes of these values were compared for the different types of stress. Micturition reflex was analyzed using unconscious cystometry. Naftopidil was administered orally at 30 mg/kg/day for 2 weeks. Results Unexpectedly, no stress-exposed rats exhibited increased micturition frequency compared to the normal nonstressed control. However, intercontraction intervals were shortened with each type of stress in the unconscious condition, especially by RVS (P<0.01). Naftopidil prolonged the shortened intervals. Conclusions Although voiding behavior appears approximately normal in rats chronically exposed to emotional stress, internal bladder function can be affected. With anesthesia, micturition intervals were moderately shortened by emotional stress and clearly improved by naftopidil. Therefore, naftopidil appears to act at the spinal level at least.
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Andersson KE. TRP Channels as Lower Urinary Tract Sensory Targets. Med Sci (Basel) 2019; 7:E67. [PMID: 31121962 PMCID: PMC6572419 DOI: 10.3390/medsci7050067] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 05/19/2019] [Accepted: 05/20/2019] [Indexed: 12/13/2022] Open
Abstract
Several members of the transient receptor potential (TRP) superfamily, including TRPV1, TRPV2, TRPV4, TRM4, TRPM8 and TRPA1, are expressed in the lower urinary tract (LUT), not only in neuronal fibers innervating the bladder and urethra, but also in the urothelial and muscular layers of the bladder and urethral walls. In the LUT, TRP channels are mainly involved in nociception and mechanosensory transduction. Animal studies have suggested the therapeutic potential of several TRP channels for the treatment of both bladder over- and underactivity and bladder pain disorders,; however translation of this finding to clinical application has been slow and the involvement of these channels in normal human bladder function, and in various pathologic states have not been established. The development of selective TRP channel agonists and antagonists is ongoing and the use of such agents can be expected to offer new and important information concerning both normal physiological functions and possible therapeutic applications.
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Affiliation(s)
- Karl-Erik Andersson
- Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston Salem, NC 27101, USA.
- Institute of Laboratory Medicine, Lund University, 223 62 Lund, Sweden.
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Characterization on Responsiveness of Excitatory Synaptic Transmissions to α1-Adrenoceptor Blockers in Substantia Gelatinosa Neurons Isolated From Lumbo-Sacral Level in Rat Spinal Cords. Int Neurourol J 2019; 23:13-21. [PMID: 30943690 PMCID: PMC6449664 DOI: 10.5213/inj.1938056.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 03/10/2019] [Indexed: 12/14/2022] Open
Abstract
Purpose The aim of this study was to characterize the responsiveness of miniature excitatory postsynaptic currents (mEPSCs) to α1-adrenoceptor blockers in substantia gelatinosa (SG) neurons from the spinal cord to develop an explanation for the efficacy of α1-adrenoceptor blockers in micturition dysfunction. Methods Male adult Sprague-Dawley rats were used. Blind whole-cell patch-clamp recordings were performed using SG neurons in spinal cord slices. Naftopidil (100μM), tamsulosin (100μM), or silodosin (30μM), α1-adrenoceptor blockers, was perfused. The frequency of mEPSCs was recorded in an SG neuron to which the 3 blockers were applied sequentially with wash-out periods. Individual frequencies in a pair before naftopidil and tamsulosin perfusion were plotted as baseline, and the correlation between them was confirmed by Spearman correlation coefficient; linear regression was then performed. The same procedure was performed before naftopidil and silodosin perfusion. Frequencies of pairs after naftopidil and tamsulosin perfusion and after naftopidil and silodosin perfusion were similarly analyzed. The ratios of the frequencies after treatment to before were then calculated. Results After the treatments, Spearman ρ and the slope were decreased to 0.682 from 0.899 at baseline and 0.469 from 1.004 at baseline, respectively, in the tamsulosin group relative to the naftopidil group. In the silodosin group, Spearman ρ and the slope were also decreased to 0.659 from 0.889 at baseline and 0.305 from 0.989 at baseline, respectively, relative to the naftopidil group. Naftopidil significantly increased the ratio of the frequency of mEPSCs compared to tamsulosin and silodosin (P=0.015 and P=0.004, respectively). Conclusions There was a difference in responsiveness in the frequency of mEPSCs to α1-adrenoceptor blockers, with the response to naftopidil being the greatest among the α1-adrenoceptor blockers. These data are helpful to understand the action mechanisms of α1-adrenoceptor blockers for male lower urinary tract symptoms in clinical usage.
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Seasonal Changes in Lower Urinary Tract Symptoms in Japanese Men With Benign Prostatic Hyperplasia Treated With α 1-Blockers. Int Neurourol J 2017; 21:197-203. [PMID: 28954461 PMCID: PMC5636957 DOI: 10.5213/inj.1734830.415] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 03/21/2017] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To investigate whether seasonal changes occurred in lower urinary tract symptoms (LUTS) in patients with benign prostatic hyperplasia (BPH). METHODS Patients aged 50 years and older with BPH treated with α1-blockers were enrolled. The International Prostate Symptom Score (IPSS), quality of life (QoL) score, maximum and average flow rate, voided volume, and postvoid residual volume were measured in summer and winter. RESULTS A total of 164 patients were enrolled. The total IPSS and QoL index did not show a significant difference between the 2 seasons. When the IPSS was divided into storage symptoms and voiding symptoms, storage symptoms in winter were substantially but nonsignificantly higher than those in summer (P=0.056). Of the 7 individual symptoms in the IPSS, a significant seasonal difference was observed only for nocturia, with a higher score in winter. Moreover, none of the uroflowmetric parameters showed a seasonal change. Voided volume had significant correlations with each symptom (urgency and nocturia) and overall subjective scores (storage, total IPSS, and QoL) exclusively in summer, while this correlation remained only for nocturia in winter. CONCLUSIONS As it has generally been assumed that LUTS deteriorate in winter, the present study corroborated that the severity of storage symptoms was higher in winter than in summer, even in patients treated with α1-blockers. In contrast, a seasonal difference was not observed in the uroflowmetric parameters, which may be partly due to the loss of the correlation between subjective and objective measurements of storage symptoms in winter.
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Shim SR, Kim JH, Won JH, Song ES, Song YS. Association between ambient temperature and lower urinary tract symptoms: a community-based survey. Int Braz J Urol 2017; 42:521-30. [PMID: 27286116 PMCID: PMC4920570 DOI: 10.1590/s1677-5538.ibju.2015.0159] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 08/10/2015] [Indexed: 12/11/2022] Open
Abstract
Purpose The aim of this study was to evaluate the individual change of International prostate Symptom Score (IPSS) and Overactive Bladder Symptom Score (OABSS) in each patient by temperature conditions. Materials and Methods The severity of lower urinary tract symptoms (LUTS) was explored using the IPSS and OABSS questionnaires that were completed by 2.486 subjects (923 males and 1.563 females) aged 60 years and older. Korea Meteorological Administration data was used to determine daily average temperature and daily temperature difference on the interview dates at each site. Results The mean IPSS and mean age for males was 13.45±8.24 and 75.03±6.20 years, respectively. The mean OABSS and mean age for females was 4.41±3.10 and 73.74±6.03years, respectively. Daily average temperature and daily temperature difference ranged from-3.4-28.3oC and 2.2-16.9oC, respectively. Age was a significantly risk factor for IPSS, OABSS, and QoL (P<0.001, <0.001, and 0.005, respectively). After multiple regression analysis, daily average temperatures did not show a statistically significant change in IPSS and OABSS. Only daily temperature differences were associated with male LUTS. Conclusions While LUTS could be worsened in low temperatures generally, IPSS and OABSS were not affected by daily average temperature conditions. Daily temperature differences may be more influential than daily average temperatures.
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Affiliation(s)
- Sung Ryul Shim
- Department of Urology, Okmeydani Teaching and Research Hospital, Istanbul, Turkey
| | - Jae Heon Kim
- Department of Urology, Soonchunhyang University Hospital, Soonchunhyang University School of Medicine, Seoul. Korea
| | - Jong Ho Won
- Department of Internal Medicine, Soonchunhyang University School of Medicine, Seoul, Korea
| | - Eun Seop Song
- Department of Obstetrics and Gynecology, Inha University School of Medicine, Incheon, Korea
| | - Yun Seob Song
- Department of Urology, Soonchunhyang University Hospital, Soonchunhyang University School of Medicine, Seoul. Korea
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Sugaya K, Nishijima S, Kadekawa K, Ashitomi K, Ueda T, Yamamoto H. Naftopidil improves locomotor activity and urinary frequency in rats with pelvic venous congestion. Biomed Res 2016; 37:221-6. [PMID: 27544997 DOI: 10.2220/biomedres.37.221] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The α1D/A receptor antagonist, naftopidil, inhibits micturition reflex by acting on various different sites. We examined the effects of naftopidil on bladder activity and changes in the induced urinary frequency using female rats with pelvic venous congestion (PC). Twenty-four female rats were divided into sham, PC, and PC/naftopidil groups. After anesthetizing rats in the PC and PC/naftopidil groups, the bilateral common iliac veins and uterine veins were ligated. Rats in the sham and PC groups were fed a standard diet, while rats in the PC/naftopidil group were fed diets containing 0.04% naftopidil. After 4 weeks of treatment, locomotor activity, urinary nitric oxide metabolites (NOx), continuous cystometry, and plasma monoamine measurements were performed. PC rats exhibited a decrease of locomotor activity, a shorter interval between bladder contractions on continuous cystometry, and decreased urinary NOx and plasma serotonin levels than the sham rats. The PC/naftopidil rats exhibited an increase of locomotor activity, a longer interval between bladder contractions, and increased urinary NOx and plasma serotonin levels. Therefore, naftopidil might improve bladder dysfunction induced by pelvic venous congestion due to several actions in the central nervous system and bladder tissue, as well as acting as an α1 blocker to cause pelvic venous dilation.
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Imamura T, Ogawa T, Minagawa T, Nagai T, Suzuki T, Saito T, Yokoyama H, Nakazawa M, Ishizuka O. Combined treatment with a β3-adrenergic receptor agonist and a muscarinic receptor antagonist inhibits detrusor overactivity induced by cold stress in spontaneously hypertensive rats. Neurourol Urodyn 2016; 36:1026-1033. [DOI: 10.1002/nau.23061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 06/10/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Tetsuya Imamura
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Teruyuki Ogawa
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Tomonori Minagawa
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Takashi Nagai
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Toshiro Suzuki
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Tetsuichi Saito
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Hitoshi Yokoyama
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Masaki Nakazawa
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Osamu Ishizuka
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
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Andersson KE. Potential Future Pharmacological Treatment of Bladder Dysfunction. Basic Clin Pharmacol Toxicol 2016; 119 Suppl 3:75-85. [DOI: 10.1111/bcpt.12577] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 12/23/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Karl-Erik Andersson
- Institute for Regenerative Medicine; Wake Forest University School of Medicine; Winston Salem NC USA
- Aarhus Institute for Advanced Sciences (AIAS); Aarhus University; Aarhus Denmark
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15
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Abstract
The pathophysiology of OAB is complex, multifactorial and still largely unknown. Several pathophysiological mechanisms have been highlighted that may play a different role in different patient groups. There are now experimental evidences that support both the myogenic and neurogenic hypothesis, but in recent years the "integrative" hypothesis has been gaining more and more acceptance, where a disruption in the multiple interactions between different cell types (neurons, urothelium, interstitial cells, myocytes) and network functions represent a central element of lower urinary tract dysfunctions. Of utmost importance, a disorder in the urothelial sensory function and in the urothelial/suburothelial non-neural cholinergic system, favored by age and comorbidities, appears to be crucial for the development of the OAB. Neuroplastic and detrusor changes in OAB are broadly similar to those observed in bladders exposed to outlet obstruction, neuropathies, inflammation or aging, and may be driven by a common urothelial dysfunction. Several signaling substances and their receptors were found to be involved in central pathways of bidirectional communication between the different cell types in the bladder, and were shown to be modified in several animal models of OAB as well as in human models, indicating new potential therapeutic targets.
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Minagawa T, Ishizuka O. Status of urological Kampo medicine: A narrative review and future vision. Int J Urol 2015; 22:254-63. [DOI: 10.1111/iju.12685] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 10/17/2014] [Accepted: 10/26/2014] [Indexed: 12/26/2022]
Affiliation(s)
- Tomonori Minagawa
- Department of Urology; Shinshu University Hospital; Matsumoto Nagano Japan
| | - Osamu Ishizuka
- Department of Urology; Shinshu University Hospital; Matsumoto Nagano Japan
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Sugaya K, Nishijima S, Kadekawa K, Ashitomi K, Ueda T, Yamamoto H. Spinal mechanism of micturition reflex inhibition by naftopidil in rats. Life Sci 2014; 116:106-11. [PMID: 25258114 DOI: 10.1016/j.lfs.2014.09.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 08/12/2014] [Accepted: 09/04/2014] [Indexed: 10/24/2022]
Abstract
AIM We investigated the spinal mechanism through which naftopidil inhibits the micturition reflex by comparing the effects of noradrenaline and naftopidil in rats. METHODS The following were investigated: the influence of oral naftopidil on plasma monoamine and amino acid levels, the distribution of oral 14C-naftopidil, the effects of intravenous (IV) or intrathecal (IT) injection of noradrenaline or naftopidil on isovolumetric bladder contractions, amino acid levels in the lumbosacral spinal cord after IT noradrenaline or naftopidil, and the effects of IT naftopidil and strychnine and/or bicuculline on isovolumetric bladder contractions. KEY FINDINGS Oral naftopidil decreased the plasma adrenaline level, while it increased the serotonin and glycine levels. After oral administration, 14C-naftopidil was detected in the spinal cord and cerebrum, as well as in plasma and the prostate gland. When the bladder volume was below the threshold for isovolumetric reflex contractions, IV (0.1mg) or IT (0.1μg) noradrenaline evoked bladder contractions, but IV (1mg) or IT (0.01-1μg) naftopidil did not. When the bladder volume was above the threshold for isovolumetric reflex contractions, IV or IT noradrenaline transiently abolished bladder contractions. IT noradrenaline decreased the levels of glycine and gamma-aminobutyric acid (GABA) in the lumbosacral cord, while IT naftopidil increased the GABA level. IT strychnine and/or bicuculline blocked the inhibitory effect of IT naftopidil on bladder contractions. SIGNIFICANCE Naftopidil inhibits the micturition reflex by blocking α1 receptors, as well as by the activation of serotonergic, glycinergic, and GABAergic neurons in the central nervous system.
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Affiliation(s)
- Kimio Sugaya
- Southern Knights' Laboratory LLP, Okinawa, Japan.
| | | | | | | | - Tomoyuki Ueda
- The Institute for Animal Experiments, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Hideyuki Yamamoto
- Department of Biochemistry, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
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Imamura T, Ishizuka O, Ogawa T, Yamagishi T, Yokoyama H, Minagawa T, Nakazawa M, Gautam SS, Nishizawa O. Muscarinic receptors mediate cold stress-induced detrusor overactivity in type 2 diabetes mellitus rats. Int J Urol 2014; 21:1051-8. [PMID: 24807830 DOI: 10.1111/iju.12475] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 04/03/2014] [Indexed: 12/24/2022]
Abstract
OBJECTIVES This study determined if muscarinic receptors could mediate the cold stress-induced detrusor overactivity induced in type 2 diabetes mellitus rats. METHODS Ten-week-old female Goto-Kakizaki diabetic rats (n = 12) and Wister Kyoto non-diabetic rats (n = 12) were maintained on a high-fat diet for 4 weeks. Cystometric investigations of the unanesthetized rats were carried out at room temperature (27 ± 2°C) for 20 min. They were intravenously administered imidafenacin (0.3 mg/kg, n = 6) or vehicle (n = 6). After 5 min, the rats were transferred to a low temperature (4 ± 2°C) for 40 min where the cystometry was continued. The rats were then returned to room temperature for the final cystometric measurements. Afterwards, expressions of bladder muscarinic receptor M3 and M2 messenger ribonucleic acids and proteins were assessed by reverse transcription polymerase chain reaction and immunohistochemistry. RESULTS In non-diabetic Wister Kyoto rats, imidafenacin did not reduce cold stress-induced detrusor overactivity. In diabetic Goto-Kakizaki rats, just after transfer to a low temperature, the cold stress-induced detrusor overactivity in imidafenacin-treated rats was reduced compared with vehicle-treated rats. Within the urinary bladders, the ratio of M3 to M2 receptor messenger ribonucleic acid in the diabetic Goto-Kakizaki rats was significantly higher than that of the non-diabetic Wister Kyoto rats. The proportion of muscarinic M3 receptor-positive area within the detrusor in diabetic Goto-Kakizaki rats was also significantly higher than that in non-diabetic Wister Kyoto rats. CONCLUSIONS Imidafenacin partially inhibits cold stress-induced detrusor overactivity in diabetic Goto-Kakizaki rats. In this animal model, muscarinic M3 receptors partially mediate cold stress-induced detrusor overactivity.
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Affiliation(s)
- Tetsuya Imamura
- Department of Lower Urinary Tract Medicine, Shinshu University School of Medicine, Matsumoto, Japan
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IMAMURA T, ISHIZUKA O, OGAWA T, YAMAGISHI T, YOKOYAMA H, MINAGAWA T, NAKAZAWA M, NISHIZAWA O. Pathways Involving Beta-3 Adrenergic Receptors Modulate Cold Stress-Induced Detrusor Overactivity in Conscious Rats. Low Urin Tract Symptoms 2014; 7:50-5. [DOI: 10.1111/luts.12050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Revised: 12/10/2013] [Accepted: 12/20/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Tetsuya IMAMURA
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto Japan
| | - Osamu ISHIZUKA
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto Japan
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Teruyuki OGAWA
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Takahiro YAMAGISHI
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Hitoshi YOKOYAMA
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Tomonori MINAGAWA
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Masaki NAKAZAWA
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Osamu NISHIZAWA
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto Japan
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
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20
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HAN DY, JEONG HJ, LEE MY. Bladder Hyperactivity Induced by Chronic Variable Stress in Rats. Low Urin Tract Symptoms 2014; 7:56-61. [DOI: 10.1111/luts.12048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 11/15/2013] [Accepted: 12/10/2013] [Indexed: 01/25/2023]
Affiliation(s)
- Dong Youp HAN
- Department of Urology; School of Medicine; Wonkwang University; Iksan Korea
| | - Hee Jong JEONG
- Department of Urology; School of Medicine; Wonkwang University; Iksan Korea
| | - Moon Young LEE
- Department of Physiology; Institute of Wonkwang Medical Science; School of Medicine; Wonkwang University; Iksan Korea
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21
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Morita T, Kubo KKT, Fujisaki A, Natsui S, Nukui A, Kobayashi M, Kurokawa S. Involvement of magnitude of ambient temperature change in nonspecific effect in perceived placebo effect on lower urinary tract symptoms: study on switching of naftopidil in patients with benign prostatic hyperplasia. Res Rep Urol 2014; 5:83-90. [PMID: 24400239 PMCID: PMC3826939 DOI: 10.2147/rru.s42583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To determine if switching from one brand of the α1-adrenoceptor antagonist naftopidil (Avishot™) to another brand (Flivas™) under the same conditions causes the same changes in lower urinary tract symptoms (LUTS) and quality of life (QOL) as the perceived placebo effect, and if ambient temperature as a nonspecific factor is related to those changes in benign prostatic hyperplasia (BPH) patients. PATIENTS AND METHODS A retrospective study was carried out on 217 BPH patients who had received Avishot™ for more than 6 months and then were switched to Flivas™ at the same dose and timing. The two drugs contain the same principal ingredient and display the same pharmacokinetic properties. The International Prostate Symptom Score (IPSS), QOL score, and average monthly ambient temperature at the patients' residence area from the Automated Meteorological Data Acquisition System in Japan were used for the evaluation. RESULTS A significant change in urinary storage symptoms (P = 0.006), and especially in nighttime frequency (P< 0.001), was observed by switching drugs, suggesting the perceived placebo effect. There was significant improvement of daytime frequency (P< 0.05), nighttime frequency (P< 0.001), storage symptoms (P< 0.001), and total IPSS (P< 0.05) when the magnitude of ambient temperature change from before and 3 months after switching drugs was higher than 10°C, while no significant improvement was noted in any of the parameters examined when the same was lower than 10°C. CONCLUSION The present study showed the nonspecific effect of magnitude of ambient temperature change was involved in the perceived placebo effect on LUTS, especially on storage symptoms, by switching drugs. The nonspecific effect on LUTS with BPH needs to be considered when evaluating subjective treatment efficacy of drugs for LUTS with BPH in routine clinical practice. The present study supports the lifestyle advice "avoid exposing the lower body to cold temperature" or "keep warm when it is cold" for LUTS with BPH.
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Affiliation(s)
- Tatsuo Morita
- Department of Urology, Jichi Medical University, Tochigi, Japan
| | | | - Akira Fujisaki
- Department of Urology, Jichi Medical University, Tochigi, Japan
| | - Shinsuke Natsui
- Department of Urology, Jichi Medical University, Tochigi, Japan
| | - Akinori Nukui
- Department of Urology, Jichi Medical University, Tochigi, Japan
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Yamagishi T, Ishizuka O, Imamura T, Yokoyama H, Ogawa T, Kurizaki Y, Nishizawa O, Andersson KE. Alpha1-adrenergic receptors mediate bladder overactivity induced by cold stress in rats with bladder outlet obstruction. Neurourol Urodyn 2013; 34:280-5. [DOI: 10.1002/nau.22543] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 11/28/2013] [Indexed: 01/15/2023]
Affiliation(s)
- Takahiro Yamagishi
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Osamu Ishizuka
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto Japan
| | - Tetsuya Imamura
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto Japan
| | - Hitoshi Yokoyama
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Teruyuki Ogawa
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Yoshiki Kurizaki
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
| | - Osamu Nishizawa
- Department of Urology; Shinshu University School of Medicine; Matsumoto Japan
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto Japan
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine; Wake Forest University School of Medicine; Winston Salem North Carolina
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Kurizaki Y, Ishizuka O, Imamura T, Ichino M, Ishikawa M, Ogawa T, Nishizawa O. Correlation Between Bladder Mucosal Alpha-1D/Alpha-1A Adrenoceptor mRNA Ratio and Lower Urinary Tract Function in Benign Prostatic Obstruction Patients. Low Urin Tract Symptoms 2013; 5:60-4. [PMID: 26663371 DOI: 10.1111/j.1757-5672.2012.00164.x] [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: 11/30/2022]
Abstract
OBJECTIVES Alpha-1 adrenoceptor (AR) antagonists are commonly used as therapeutic agents for patients with benign prostatic obstruction (BPO). Our objective was to investigate the correlation between the ratio of bladder mucosal alpha-1D/alpha-1A adrenoceptor mRNA and lower urinary tract function in BPO patients. METHODS In 20 BPO patients, the expression level of alpha-1 AR mRNAs in the bladder mucosal biopsies was investigated by reverse transcriptase polymerase chain reaction. The subjects were divided into two groups. In Group 1, the ratio of alpha-1D mRNA to alpha-1A mRNA was greater than one. In Group 2, the ratio was less than one. We determined the correlation by Schäfer nomogram between Group 1 and Group 2 patients and lower urinary tract function as determined by a video urodynamic study. RESULTS Two patients were excluded due to inability to void. Another was excluded because the alpha-1D/alpha-1A mRNA ratio was one. On the Schäfer nomogram, six of nine Group 1 cases had obstructions less than IV and normal or weak detrusor contractility. For Group 2, six of eight cases had obstructions more than IV and normal or strong detrusor contractility. CONCLUSION Patients with higher levels of alpha-1D AR mRNA were distinct from those with higher alpha-1A AR mRNA levels with regard to obstruction and detrusor activity. The results suggest that the Schäfer nomogram might be useful in determining which alpha-1 AR antagonists are better for BPO patients suffering from storage symptoms.
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Affiliation(s)
- Yoshiki Kurizaki
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Ishizuka
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tetsuya Imamura
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Midori Ichino
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Masakuni Ishikawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Teruyuki Ogawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Nishizawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
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Noguchi W, Ishizuka O, Imamura T, Kurizaki Y, Yamagishi T, Yokoyama H, Lei Z, Silwal SG, Nishizawa O, Andersson KE. The Relationship Between α1-Adrenergic Receptors and TRPM8 Channels in Detrusor Overactivity Induced by Cold Stress in Ovariectomized Rats. J Urol 2013; 189:1975-81. [DOI: 10.1016/j.juro.2012.10.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 10/04/2012] [Indexed: 10/27/2022]
Affiliation(s)
- Wataru Noguchi
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Ishizuka
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tetsuya Imamura
- Department of Lower Urinary Tract Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Yoshiki Kurizaki
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takahiro Yamagishi
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Hitoshi Yokoyama
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Zhang Lei
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Sudha Gautam Silwal
- Department of Lower Urinary Tract Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Nishizawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina
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Imamura T, Ishizuka O, Nishizawa O. Cold stress induces lower urinary tract symptoms. Int J Urol 2013; 20:661-9. [DOI: 10.1111/iju.12129] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 01/29/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Tetsuya Imamura
- Department of Lower Urinary Tract Medicine; Shinshu University School of Medicine; Matsumoto; Nagano; Japan
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26
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Imamura T, Ishizuka O, Sudha GS, Lei Z, Hosoda T, Noguchi W, Yamagishi T, Yokoyama H, Kurizaki Y, Nishizawa O. A galenical produced from Ba-Wei-Die-Huang-Wan (THC-002) provides resistance to the cold stress-induced detrusor overactivity in conscious rats. Neurourol Urodyn 2012; 32:486-92. [DOI: 10.1002/nau.22335] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Accepted: 09/17/2012] [Indexed: 11/05/2022]
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27
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Lei Z, Ishizuka O, Imamura T, Noguchi W, Yamagishi T, Yokoyama H, Kurizaki Y, Sudha GS, Hosoda T, Nishizawa O, Andersson KE. Functional roles of transient receptor potential melastatin 8 (TRPM8) channels in the cold stress-induced detrusor overactivity pathways in conscious rats. Neurourol Urodyn 2012; 32:500-4. [DOI: 10.1002/nau.22325] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 08/31/2012] [Indexed: 11/07/2022]
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Abstract
There have been few studies regarding the onset of urinary sensations and frequent urination induced by sudden whole-body cooling. In this article, we review the relationship between cold stress and urinary frequency based mainly on our previous studies. A recent study showed that cold stress induces bladder overactivity in conscious rats, and these effects were mediated, at least in part, by α1A -adrenergic receptor (AR) and α1D -AR. Another study suggested that the resiniferatoxin-sensitive nerves present in the urinary bladder may also be involved in the regulation of detrusor activity associated with cold stress. The mammalian transient receptor potential (TRP) channel family consists of 28 channels subdivided into five different classes: TRPV (vanilloid), TRPC (canonical), TRPM (melastatin), TRPML (mucolipin), and TRPA (ankyrin). TRP channels function as multifunctional sensors at the cellular level. They can be activated by physical (voltage, heat, cold, mechanical stress) or chemical stimuli and binding of specific ligands. In 2002, it was reported that a nonselective cation channel, TRPM8, could be activated by both menthol and thermal stimuli (8-28 °C). We demonstrated the presence of TRPM8 in the skin from the legs and back of rats by immunofluorescence staining and that stimulation of this receptor by menthol causes urinary frequency. There have been other reports demonstrating roles of TRPM8 not related to its thermosensory function. Further studies are needed to clarify the mechanism of cold stress-induced urinary frequency, and the roles of TRPM8 in the micturition control system.
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Affiliation(s)
- Osamu Ishizuka
- Department of UrologyLower Urinary Tract Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tetsuya Imamura
- Department of UrologyLower Urinary Tract Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Nishizawa
- Department of UrologyLower Urinary Tract Medicine, Shinshu University School of Medicine, Matsumoto, Japan
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29
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Kurizaki Y, Ishizuka O, Imamura T, Ichino M, Ogawa T, Igawa Y, Nishizawa O, Andersson KE. Relation between expression of α1-adrenoceptor mRNAs in bladder mucosa and urodynamic findings in men with lower urinary tract symptoms. ACTA ACUST UNITED AC 2010; 45:15-9. [PMID: 20961266 DOI: 10.3109/00365599.2010.515611] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yoshiki Kurizaki
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Ishizuka
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tetsuya Imamura
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Midori Ichino
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Teruyuki Ogawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Yasuhiko Igawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Osamu Nishizawa
- Department of Urology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
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30
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Chen Z, Ishizuka O, Imamura T, Aizawa N, Kurizaki Y, Igawa Y, Nishizawa O, Andersson KE. Stimulation of skin menthol receptors stimulates detrusor activity in conscious rats. Neurourol Urodyn 2009; 29:506-11. [DOI: 10.1002/nau.20774] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Wood SK, Baez MA, Bhatnagar S, Valentino RJ. Social stress-induced bladder dysfunction: potential role of corticotropin-releasing factor. Am J Physiol Regul Integr Comp Physiol 2009; 296:R1671-8. [PMID: 19279290 DOI: 10.1152/ajpregu.91013.2008] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Psychological stress can impact on visceral function with pathological consequences, although the mechanisms underlying this are poorly understood. Here we demonstrate that social stress produces marked changes in bladder structure and function. Male rats were subjected to repeated (7 days) social defeat stress using the resident-intruder model. Measurement of the voiding pattern indicated that social stress produced urinary retention. Consistent with this, bladder size was increased in rats exposed to social stress. Moreover, this was negatively correlated to the latency to assume a subordinate posture, implying an association between passive behavior and bladder dysfunction. In vivo cystometry revealed distinct changes in urodynamic function in rats exposed to social stress, including increased bladder capacity, micturition volume, intermicturition interval, and the presence of non-micturition-related contractions, resembling overactive bladder. In contrast to social stress, repeated restraint (7 days) did not affect voiding, bladder weight, or urodynamics. The stress-related neuropeptide corticotropin-releasing factor (CRF) is present in spinal projections of Barrington's nucleus that regulate the micturition reflex and has an inhibitory influence in this pathway. Social stress, but not restraint, increased the number of CRF-immunoreactive neurons in Barrington's nucleus. Additionally, social stress increased CRF mRNA in Barrington's nucleus. Together, the results imply that social stress-induced CRF upregulation in Barrington's nucleus neurons results in urinary retention and, eventually, bladder dysfunction, perhaps as a visceral component of a behavioral coping response. This mechanism may underlie dysfunctional voiding in children and/or contribute to the development of stress-induced bladder disorders in adulthood.
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Affiliation(s)
- Susan K Wood
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
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