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AÇIKEL ELMAS M, BİNGÖL ÖZAKPINAR Ö, KOLGAZİ M, ŞENER G, ERCAN F. Morphological and Biochemical Investigation of the Healing Effects of Exercise on High Fat Diet Induced Kidney and Bladder Damage. CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2022. [DOI: 10.33808/clinexphealthsci.1027516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Objective: The aim of this study was to assess the preventive effects of swimming exercise on kidney and bladder damage caused by a high-fat diet (HFD) using morphological and biochemical measures.
Methods: Sprague Dawley rats were fed either standard chow (CONT, 6% fat) or HFD (45% fat) for 18 weeks, these rats were divided into two subgroups at the last 6 weeks of the experiment. The exercise groups (CONT+EXC, HFD+EXC) were trained daily swimming sessions (1 h per day for 5 days/week) during the last 6 weeks. Kidney and bladder samples were prepared for light and electron microscopic examination at the end of experiment. Malondialdehyde, glutathione, interleukin-6, and tumor necrosis factor-α were measured by biochemically.Results: Regular morphology of renal cortex and urinary bladder mucosa were observed in the CONT and CONT+EXC groups. Degenerated renal corpuscles and proximal tubules in kidney and degenerated urothelium with leaky tight junctions and increase of mast cells in bladder mucosa were observed in the HFD group. Ameliorated renal cortex and bladder mucosa were observed in the HFD+EXC group. Moreover, malondialdehyde, glutathione, interleukin-6 and tumor necrosis factor- α levels were compatible with histological findings.
Conclusion: HFD induced kidney and bladder damage may have linked to increased oxidative damage. It was observed that histological damage and altered oxidative stress parameters were reversed with swimming exercise, and it is thought that moderate swimming exercise may have a role in the regulation of oxidative stress.
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Affiliation(s)
| | | | | | - Göksel ŞENER
- FENERBAHÇE ÜNİVERSİTESİ, SAĞLIK HİZMETLERİ MESLEK YÜKSEKOKULU
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Hsu CC, Li Y, Hsu CT, Cheng JT, Lin MH, Cheng KC, Chen SW. Etanercept Ameliorates Cardiac Fibrosis in Rats with Diet-Induced Obesity. Pharmaceuticals (Basel) 2021; 14:ph14040320. [PMID: 33916242 PMCID: PMC8067047 DOI: 10.3390/ph14040320] [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: 01/27/2021] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Diet-induced obesity (DIO) is considered the main risk factor for cardiovascular diseases. Increases in the plasma levels of tumor necrosis factor alpha (TNF-α) is associated with DIO. Etanercept, a TNF-α inhibitor, has been shown to alleviate cardiac hypertrophy. To investigate the effect of etanercept on cardiac fibrosis in DIO model, rats on high fat diet (HFD) were subdivided into two groups: the etanercept group and vehicle group. Cardiac injury was identified by classic methods, while fibrosis was characterized by histological analysis of the hearts. Etanercept treatment at 0.8 mg/kg/week twice weekly by subcutaneous injection effectively alleviates the cardiac fibrosis in HFD-fed rats. STAT3 activation seems to be induced in parallel with fibrosis-related gene expression in the hearts of HFD-fed rats. Decreased STAT3 activation plays a role in the etanercept-treated animals. Moreover, fibrosis-related genes are activated by palmitate in parallel with STAT3 activation in H9c2 cells. Etanercept may inhibit the effects of palmitate, but it is less effective than a direct inhibitor of STAT3. Direct inhibition of STAT3 activation by etanercept seems unlikely. Etanercept has the ability to ameliorate cardiac fibrosis through reduction of STAT3 activation after the inhibition of TNF-α and/or its receptor.
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Affiliation(s)
- Chia-Chen Hsu
- Department of Exercise and Health Sciences, University of Taipei, Taipei City 110, Taiwan;
- Department of Otorhinolaryngology, Taipei City Hospital, Taipei City 110, Taiwan
- Graduate Institute of Gerontology and Health Care Management, Chang Gung University of Science and Technology, Guishan, Taoyuan City 613, Taiwan;
| | - Yingxiao Li
- Department of Nursing, Tzu Chi University of Science and Technology, Hualien City 970, Taiwan;
| | - Chao-Tien Hsu
- Department of Pathology, I-Shou University Medical Center, Yanchao District, Kaohsiung City 824, Taiwan;
| | - Juei-Tang Cheng
- Department of Medical Research, Chi-Mei Medical Center, Tainan City 710, Taiwan;
| | - Mang-Hung Lin
- Graduate Institute of Gerontology and Health Care Management, Chang Gung University of Science and Technology, Guishan, Taoyuan City 613, Taiwan;
| | - Kai-Chun Cheng
- Department of Pharmacy, College of Pharmacy, Tajen University, Pingtung 907, Taiwan
- Correspondence: (K.-C.C.); (S.-W.C.); Tel.: +886-8-762-4002 (K.-C.C.); +886-6-6336999 (S.-W.C.)
| | - Shang-Wen Chen
- Division of Cardiology, Chi-Mei Medical Center Liouying, Tainan City 736, Taiwan
- Correspondence: (K.-C.C.); (S.-W.C.); Tel.: +886-8-762-4002 (K.-C.C.); +886-6-6336999 (S.-W.C.)
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Marcelissen T, Anding R, Averbeck M, Hanna-Mitchell A, Rahnama'i S, Cardozo L. Exploring the relation between obesity and urinary incontinence: Pathophysiology, clinical implications, and the effect of weight reduction, ICI-RS 2018. Neurourol Urodyn 2020; 38 Suppl 5:S18-S24. [PMID: 31821633 DOI: 10.1002/nau.24072] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/19/2019] [Accepted: 05/27/2019] [Indexed: 01/10/2023]
Abstract
AIMS To evaluate the relationship between obesity and urinary incontinence (UI) and to determine the effect of weight reduction on the severity of incontinence. METHODS This is a consensus report of the proceedings of a Research Proposal from the annual International Consultation on Incontinence-Research Society, 14 June to 16 June, 2018 (Bristol, UK): "What are the relationships between obesity and UI, and the effects of successful bariatric surgery?" RESULTS Obesity is an increasing problem worldwide and is associated with many adverse effects on health and quality of life. From both translational and clinical studies, there is a strong relationship between obesity and the occurrence of UI. Both mechanical and metabolic factors seem to play an important role including systemic inflammation and oxidative stress due to the release of cytokines in visceral adipose tissue. The success rate of anti-incontinence surgery does not seem to be greatly affected by body mass index (BMI), although reliable data and long-term follow-up are currently lacking. Both weight reduction programs and bariatric surgery can result in amelioration of UI. Various studies have shown that weight loss (particularly that associated with bariatric surgery) can reduce incontinence, and the degree of weight loss is positively correlated with improvement in symptoms. CONCLUSIONS Obesity is strongly associated with an increased prevalence of both stress and urgency UI. The treatment outcome does not seem to be highly dependent on BMI. Weight reduction is positively correlated with improvement of incontinence symptoms and therefore should be advocated in the management.
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Affiliation(s)
- Tom Marcelissen
- Department of Urology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Ralf Anding
- Department of Neurourology, University Hospital Bonn, Bonn, Germany
| | - Marcio Averbeck
- Department of Urology, Moinhos de Vento Hospital, Porto Alegre, Brazil
| | | | | | - Linda Cardozo
- Department of Urogynaecology, King's College Hospital, London, UK
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Kim AK, Hamadani C, Zeidel ML, Hill WG. Urological complications of obesity and diabetes in males and females of three mouse models: temporal manifestations. Am J Physiol Renal Physiol 2020; 318:F160-F174. [PMID: 31682171 DOI: 10.1152/ajprenal.00207.2019] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Diabetic bladder dysfunction is a frequent complication of diabetes. Although many mouse models of diabetes now exist, there has been little systematic effort to characterize them for the timing of onset and severity of bladder dysfunction. We monitored metabolic status and tested bladder function by void spot assay and limited anesthetized cystometry in both male and female mice of three models of obesity and diabetes: a type 1 diabetes model (the Akita mouse) and two type 2 diabetes models [the diet-induced obese (DIO) model and the ob/ob mouse]. Akita mice had insulin pellets implanted subcutaneously every 3 mo to mimic poorly controlled type 1 diabetes in humans. Mice were hyperglycemic by 48 days after implants. Female mice exhibited no bladder dysfunction at any age up to 20 mo and gained weight normally. In contrast, by 7 mo, male Akita mice developed a profound polyuria and failed to show normal weight gain. There were no observable signs of bladder dysfunction in either sex. DIO mice on high/low-fat diets for 16 mo exhibited mild hyperglycemia in female mice (not in male mice), mild weight gain, and no evidence of bladder dysfunction. Ob/ob mice were followed for 8 mo and became extremely obese. Male and female mice were glucose intolerant, insulin intolerant, and hyperinsulinemic at 4 mo. By 8 mo, their metabolic status had improved but was still abnormal. Urine volume increased in male mice but not in female mice. Bladder dysfunction was observed in the spotting patterns of female mice at 4 and 6 mo of age, resolving by 8 mo. We conclude there are dramatic sex-related differences in lower urinary tract function in these models. Male Akita mice may be a good model for polyuria-related bladder remodeling, whereas female ob/ob mice may better mimic storage problems related to loss of outlet control in a setting of type 2 diabetes complicated by obesity.
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Affiliation(s)
- Alexandra K Kim
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Christine Hamadani
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Mark L Zeidel
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Warren G Hill
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
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Li N, Ding H, Zhang P, Li Z, Liu Y, Wang P. Attenuated BK channel function promotes overactive bladder in a rat model of obesity. Aging (Albany NY) 2019; 11:6199-6216. [PMID: 31480021 PMCID: PMC6738405 DOI: 10.18632/aging.102182] [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: 03/18/2019] [Accepted: 08/10/2019] [Indexed: 12/17/2022]
Abstract
Overactive bladder (OAB) is mostly observed in obese individuals, and is associated with enhanced excitability and contractility of the detrusor smooth muscle (DSM). Large-conductance voltage- and Ca2+-activated K+ (BK) channels reduce the excitability and contractility of the DSM. We tested whether obesity-induced OAB is associated with altered BK channel expression and activity in the DSM. Seven-week-old female Sprague-Dawley rats (N=80) were fed a normal or high-fat diet (HFD) for 12 weeks. HFD-fed rats exhibited a higher average bodyweight and urodynamically established detrusor overactivity. mRNA levels of the Kcnma1 (BKα subunit) and Kcnmb1 (BKβ1 subunit) in whole tissues and cells from the DSM were reduced in HFD-fed rats. A selective BK channel opener, NS1619, was then applied to DSM cells from the two groups of rats. Patch-clamp techniques revealed that spontaneous transient outward currents, NS1619-induced activation of spontaneous transient outward currents, and whole-cell BK currents, as well as NS1619-induced membrane hyperpolarization, were attenuated in DSM cells from HFD-fed rats. The relaxation effect of NS1619 on contractility was reduced in DSM strips from HFD-fed rats. Thus, impaired expression of Kcnma1 and Kcnmb1 in the DSM contributes to obesity-induced OAB, suggesting that BK channels could be a useful treatment targets in OAB.
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Affiliation(s)
- Ning Li
- Department of Urology, Fourth Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Honglin Ding
- Department of Urology, Fourth Affiliated Hospital, China Medical University, Shenyang, Liaoning, China.,Department of Urology, Affiliated Hospital, Chifeng University, Chifeng, Neimeng, China
| | - Peng Zhang
- Department of General Surgery, Shenyang 242 Hospital, Shenyang, Liaoning, China
| | - Zizheng Li
- Department of Urology, Fourth Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Yili Liu
- Department of Urology, Fourth Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Ping Wang
- Department of Urology, Fourth Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
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Powers SA, Ryan TE, Pak ES, Fraser MO, McClung JM, Hannan JL. Chronic high-fat diet decreased detrusor mitochondrial respiration and increased nerve-mediated contractions. Neurourol Urodyn 2019; 38:1524-1532. [PMID: 31074529 DOI: 10.1002/nau.24015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/19/2019] [Accepted: 04/03/2019] [Indexed: 01/21/2023]
Abstract
AIMS To assess the impact of chronic high-fat diet (HFD) on behavioral voiding patterns, detrusor contractility, and smooth muscle mitochondrial function in male mice. MATERIALS AND METHODS Male C57BL/6J mice (6 weeks) were fed a control or HFD for 20 weeks. Bladder function was assessed by void spot assays. Bladders were collected and detrusor contractility to carbachol (10-9 -10-5 M), and electrical field stimulation (EFS, 0.5-32 Hz) in the presence and absence of atropine was measured. Homogenized detrusor samples were placed in oxygraphs to assess the rate of oxygen consumption of the mitochondria within the detrusor in the presence of different substrates. Mitochondrial hydrogen peroxide (H2 O2 ) emission was measured fluorometrically. Detrusor citrate synthase activity was measured via enzyme activity kit and Western blots assessed the electron transport chain (ETC) protein content. RESULTS HFD significantly increased body weight, adiposity, and blood glucose levels. HFD mice demonstrated increased voiding frequency and increased EFS-induced detrusor contractility. There were no changes in detrusor relaxation or cholinergic-medicated contraction. Mitochondrial respiration was decreased with HFD and H2 O 2 emission was increased. The relative amount of mitochondria in the detrusor was similar between groups. However, ETC complexes V and III were increased following HFD. CONCLUSIONS Chronic HFD increased adiposity, lead to more frequent voiding, and enhanced EFS-mediated detrusor contractions. Mitochondrial respiration was decreased and H2 O 2 emission increased following HFD. Further research is required to determine if alterations in mitochondrial function could play a role in the development of HFD-induced bladder dysfunction.
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Affiliation(s)
- Shelby A Powers
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina
| | - Terence E Ryan
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina.,East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, North Carolina.,Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, Florida
| | - Elena S Pak
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina
| | - Matthew O Fraser
- Department of Surgery, Duke University Medical Center, Durham, North Carolina.,Department of Research and Development, Durham Veterans Affairs Medical Center, Durham, North Carolina
| | - Joseph M McClung
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina.,East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, North Carolina
| | - Johanna L Hannan
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina.,East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, North Carolina
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7
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Li N, Ding H, Li Z, Liu Y, Wang P. Effect of high-fat diet-induced obesity on the small-conductance Ca 2+-activated K + channel function affecting the contractility of rat detrusor smooth muscle. Int Urol Nephrol 2018; 51:61-72. [PMID: 30361965 DOI: 10.1007/s11255-018-2016-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 10/19/2018] [Indexed: 12/01/2022]
Abstract
PURPOSE Obesity usually induces overactive bladder (OAB) associated with detrusor overactivity, which is related to increased contractility of the detrusor smooth muscle (DSM). Small-conductance Ca2+-activated K+ (SK) channels play a constitutive role in the regulation of DSM contractility. However, the role of SK channels in the DSM changes in obesity-related OAB is still unknown. Here, we tested the hypothesis that obesity-related OAB is associated with reduced expression and activity of SK channels in DSM and that SK channels activation is a potential treatment for OAB. METHODS Female Sprague-Dawley rats were fed a normal diet (ND) or a high-fat diet (HFD) and weighed after 12 weeks. Urodynamic studies, quantitative reverse transcription-polymerase chain reaction (qRT-PCR), and isometric tension recording were performed. RESULTS Increased average body weights and urodynamically demonstrated OAB were observed in HFD rats. qRT-PCR experiments revealed a decrease in the mRNA expression level of SK channel in DSM tissue of the HFD rats. Isometric tension recordings indicated an attenuated relaxation effect of NS309 on the spontaneous phasic and electrical field stimulation-induced contractions that occurred via SK channel activation in HFD DSM strips. CONCLUSIONS Reduced expression and activity of SK channels in the DSM contribute to obesity-related OAB, indicating that SK channels are a potential therapeutic target for OAB.
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Affiliation(s)
- Ning Li
- Department of Urology, Fourth Affiliated Hospital, China Medical University, 4 Chongshan East Road, Shenyang, Liaoning, China
| | - Honglin Ding
- Department of Urology, Fourth Affiliated Hospital, China Medical University, 4 Chongshan East Road, Shenyang, Liaoning, China.,Department of Urology, Affiliated Hospital, Chifeng University, 42 Wangfu Street, Chifeng, Neimeng, China
| | - Zizheng Li
- Department of Urology, Fourth Affiliated Hospital, China Medical University, 4 Chongshan East Road, Shenyang, Liaoning, China
| | - Yili Liu
- Department of Urology, Fourth Affiliated Hospital, China Medical University, 4 Chongshan East Road, Shenyang, Liaoning, China.
| | - Ping Wang
- Department of Urology, Fourth Affiliated Hospital, China Medical University, 4 Chongshan East Road, Shenyang, Liaoning, China
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Ellenbroek JH, Arioglu Inan E, Michel MC. A systematic review of urinary bladder hypertrophy in experimental diabetes: Part 2. Comparison of animal models and functional consequences. Neurourol Urodyn 2018; 37:2346-2360. [DOI: 10.1002/nau.23786] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/03/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Johanne H. Ellenbroek
- Department of Internal Medicine; Leiden University Medical Centre; Leiden The Netherlands
| | | | - Martin C. Michel
- Department of Pharmacology; Johannes Gutenberg University; Mainz Germany
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de Oliveira MG, Nascimento DM, Alexandre EC, Bonilla-Becerra SM, Zapparoli A, Mónica FZ, Antunes E. Menthol ameliorates voiding dysfunction in types I and II diabetic mouse model. Neurourol Urodyn 2018; 37:2510-2518. [DOI: 10.1002/nau.23785] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/03/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Mariana G. de Oliveira
- Faculty of Medical Sciences; Department of Pharmacology; University of Campinas; Campinas Sao Paulo Brazil
| | - Daniel M. Nascimento
- Faculty of Medical Sciences; Department of Pharmacology; University of Campinas; Campinas Sao Paulo Brazil
| | - Eduardo C. Alexandre
- Faculty of Medical Sciences; Department of Pharmacology; University of Campinas; Campinas Sao Paulo Brazil
| | - Sandra M. Bonilla-Becerra
- Faculty of Medical Sciences; Department of Pharmacology; University of Campinas; Campinas Sao Paulo Brazil
| | - Adriana Zapparoli
- Faculty of Medical Sciences; Department of Medicine and Experimental Surgery; University of Campinas; Campinas Sao Paulo Brazil
| | - Fabiola Z. Mónica
- Faculty of Medical Sciences; Department of Pharmacology; University of Campinas; Campinas Sao Paulo Brazil
| | - Edson Antunes
- Faculty of Medical Sciences; Department of Pharmacology; University of Campinas; Campinas Sao Paulo Brazil
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10
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Sezginer EK, Yilmaz-Oral D, Lokman U, Nebioglu S, Aktan F, Gur S. Effects of varying degrees of partial bladder outlet obstruction on urinary bladder function of rats: A novel link to inflammation, oxidative stress and hypoxia. Low Urin Tract Symptoms 2017; 11:O193-O201. [PMID: 29282885 DOI: 10.1111/luts.12211] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 10/13/2017] [Accepted: 10/30/2017] [Indexed: 12/21/2022]
Abstract
OBJECTIVES The aim of the present study was to investigate the effects of different degrees of obstruction, and the roles of inflammation, oxidative stress, and hypoxia parameters on bladder function. METHODS Thirty male Sprague-Dawley rats were divided into 3 groups (n = 10 in each group): (i) sham-operated control; (ii) severe partial bladder outlet obstruction (PBOO); and (iii) moderate PBOO. Severe and moderate PBOO were induced by urethral ligation using 3-Fr and 4-Fr catheters, respectively, for 6 weeks. After 6 weeks, the in vitro contractile responses to carbachol, electrical field stimulation, ATP and KCl were measured in bladder strips. In addition, mRNA and protein expression of nuclear factor kappa B (NF-κB) hypoxia-inducible factor (HIF) and nuclear factor, erythroid 2-like 2 (Nrf2) in bladder were determined by real-time polymerase chain reaction and western blotting. Malondialdehyde (MDA) levels in bladder tissues were also determined. RESULTS Rats in the severe PBOO group had the highest bladder weight. Detrusor strips from rats in the severe PBOO group exhibited 61%-82% smaller contractile responses to all four stimuli than those from the sham-operated group. Activity of NF-κB as an inflammatory marker was increased in the severe PBOO group, whereas HIF-1α and HIF-2β protein levels were increased significantly in the moderate PBOO group. A master regulator of oxidative stress, Nrf2 expression was increased in all obstructed rats. MDA levels were higher in the severe PBOO group than in sham-operated group. CONCLUSION The results of the present study reveal the importance of oxidative stress-induced NF-κB signaling in bladder dysfunction with severe obstruction. Altered HIF signaling may contribute to the functional impairment after PBOO. Novel and evolving therapies targeting oxidative and/or inflammatory pathways may be a reasonable strategy for the management of lower urinary tract symptoms or benign prostatic hyperplasia.
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Affiliation(s)
- Ecem Kaya Sezginer
- Faculty of Pharmacy, Department of Biochemistry, Ankara University, Ankara, Turkey
| | - Didem Yilmaz-Oral
- Faculty of Pharmacy, Department of Biochemistry, Ankara University, Ankara, Turkey
| | - Utku Lokman
- Department of Urology, Ankara Occupational Diseases Hospital, Ankara, Turkey
| | - Serpil Nebioglu
- Faculty of Pharmacy, Department of Biochemistry, Ankara University, Ankara, Turkey
| | - Fugen Aktan
- Faculty of Pharmacy, Department of Biochemistry, Ankara University, Ankara, Turkey
| | - Serap Gur
- Faculty of Pharmacy, Department of Biochemistry, Ankara University, Ankara, Turkey
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Treatment of obesity-associated overactive bladder by the phosphodiesterase type-4 inhibitor roflumilast. Int Urol Nephrol 2017; 49:1723-1730. [PMID: 28756610 DOI: 10.1007/s11255-017-1671-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 07/25/2017] [Indexed: 12/11/2022]
Abstract
PURPOSE To prove that phosphodiesterase type-4 inhibitors could potentially treat obesity-associated overactive bladder through modulation of the systemic inflammatory response. METHODS In this 12-week study, 90 female Sprague-Dawley rats were divided into three groups: (1) vehicle-treated normal diet (ND)-fed rats; (2) vehicle-treated high-fat diet (HFD)-fed rats; and (3) roflumilast-treated HFD-fed rats. Oral roflumilast (5 mg/kg/day) was administered during the last 4 weeks of HFD feeding in the test group. At 12 weeks, a urodynamic study was performed in ten rats of each group. Bladder tissue was extracted, the bladder mucosa was separated under microscopy, and bladder detrusor smooth muscle (DSM) expression of TNF-α, interleukin (IL)-6, IL-1β, and nuclear factor kappa B (NF-κB) were analyzed using Western blotting and quantitative reverse transcription-polymerase chain reaction (qRT-PCR). RESULTS Bodyweights of the HFD-fed rats significantly increased and were not ameliorated by roflumilast treatment. Cystometry evidenced augmented frequency and non-void contractions in obese rats that were also prevented by roflumilast. These alterations were accompanied by a markedly increased expression of TNF-α, IL-6, IL-1β, and NF-κB in DSM of obese rats. Furthermore, roflumilast decreased expression of inflammatory factors in DSM. CONCLUSIONS Oral treatment with roflumilast in rats fed an HFD restores normal bladder function and downregulates expression of inflammatory factors in the bladder.
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12
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Lin CS, Wu TTL, Chang CH, Cheng JT, Tong YC. Changes of Bladder M 1,3 Muscarinic Receptor Expression in Rats Fed with Short-Term/Long-Term High-Fat Diets. Low Urin Tract Symptoms 2017; 10:315-319. [PMID: 28681521 DOI: 10.1111/luts.12171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 12/14/2016] [Accepted: 02/07/2017] [Indexed: 12/11/2022]
Abstract
OBJECTIVES To investigate the effect of high-fat diet (HFD) on bladder M1,3 muscarinic receptor expression and contractile function in the rat. METHODS Eight-week-old male rats were divided into two groups including one with HFD for 8 weeks (short-term) and the other for 24 weeks (long-term). Each group was compared to age-matched rats fed with normal chow as controls. The body weight, food intake amount and blood biochemistry were monitored. Bladder muscle contractile responses to acetylcholine (0.1-10 μM), bethanechol (10 μM) and KCl (50 mM) were studied in an organ bath set-up. Bladder M1 and M3 muscarinic receptor protein expressions were measured by Western blotting analysis. RESULTS Increase in body weight as well as blood triglyceride, cholesterol and sugar levels compared to controls were noted in both 8- and 24-week HFD rats. Eating appetite change with increased food and water intakes was noted in the HFD rats. Significantly decreased bladder contractile responses to acetylcholine and bethanechol were shown in both HFD groups. On the other hand, decreased bladder contractile response to KCl was demonstrated in the 24-week group but not the 8-week group. The expressions of bladder M1 and M3 muscarinic receptor proteins were significantly and progressively decreased by HFD feeding from 8 to 24 weeks. CONCLUSIONS High-fat diet induces obesity and polyphagia in rats. Short-term and long-term HFD feeding decrease rat bladder M1 and M3 receptor expressions as well as contractile responses to the agonistic stimulation. In addition, bladder muscle dysfunction develops after long-term HFD feeding.
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Affiliation(s)
- Chian-Shiung Lin
- Department of Urology, Chi Mei Medical Center-Liouyin, Tainan, Taiwan
| | - Tony T-L Wu
- Division of Urology, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,Department of Urology, School of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Chin-Hong Chang
- Department of Neurosurgery, Chi-Mei Medical Center, Tainan, Taiwan.,Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - Juei-Tang Cheng
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan.,Department of Pharmacology, Institute of Medical Sciences, Chang Jung Christian University, Tainan, Taiwan
| | - Yat-Ching Tong
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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13
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CHEN IH, CHENG JT, TONG YC. Metabolic Syndrome Induced Bladder Cannabinoid Receptor Changes in the Fructose-Fed Rats. Low Urin Tract Symptoms 2017; 10:198-203. [DOI: 10.1111/luts.12156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/11/2016] [Accepted: 08/01/2016] [Indexed: 12/16/2022]
Affiliation(s)
- I-Hung CHEN
- Department of Urology, National Cheng Kung University Hospital, College of Medicine; National Cheng Kung University; Tainan Taiwan
| | - Juei-Tang CHENG
- Department of Medical Research, Chi-Mei Medical Center; Tainan Taiwan
- Department of Pharmacology, Institute of Medical Sciences; Chang Jung Christian University; Tainan Taiwan
| | - Yat-Ching TONG
- Department of Urology, National Cheng Kung University Hospital, College of Medicine; National Cheng Kung University; Tainan Taiwan
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14
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He Q, Babcook MA, Shukla S, Shankar E, Wang Z, Liu G, Erokwu BO, Flask CA, Lu L, Daneshgari F, MacLennan GT, Gupta S. Obesity-initiated metabolic syndrome promotes urinary voiding dysfunction in a mouse model. Prostate 2016; 76:964-76. [PMID: 27040645 PMCID: PMC4946024 DOI: 10.1002/pros.23185] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 03/11/2016] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Accumulating evidences suggests that obesity and metabolic syndrome (MetS) contribute towards lower urinary tract symptoms (LUTS) through alterations in the phenotype of bladder and prostate gland. Clinical studies indicate a link between MetS and LUTS. Nevertheless, there is lack of suitable animal model(s) which could illustrate an association linking obesity to LUTS. We examined the lower urinary tract function in an obesity-initiated MetS mouse model. METHODS Male C57BL/6N wild-type and obese B6.V-Lepob/J maintained on regular diet for 28 weeks were subjected to the assessment of body weight (BW), body length (BL), waist circumference (WC), body mass index (BMI), blood glucose (BG), plasma insulin (INS), plasma leptin (LEP), total cholesterol (CHO), free fatty acid (FFA), and measurement of urinary functions. Whole animal peritoneal and subcutaneous adipose tissue measurements as well as prostate and bladder volumes were analyzed by MRI followed by histological evaluation. These parameters were used to draw correlations between MetS and LUTS. RESULTS Obesity parameters such as BW, WC, and BMI were significantly higher in B6.V-Lepob/J mice compared to C57BL/6N mice (P < 0.01). Higher levels of total CHO and FFA were noted in B6.V-Lepob/J mice than C57BL/6N mice (P < 0.05). These results were concurrent with frequency, lower average urine volume and other urinary voiding dysfunctions in B6.V-Lepob/J mice. MRI assessments demonstrate marked increase in body fat and prostate volume in these mice. Compared to C57BL/6N mice, histological analysis of the prostate from B6.V-Lepob/J mice showed increased proliferation, gland crowding, and infiltration of immune cells in the stroma; whereas the bladder urothelium was slightly thicker and appears more proliferative in these mice. The regression and correlation analysis indicate that peritoneal fat (R = 0.853; P < 0.02), CHO (R = 0.729; P < 0.001), BG (R = 0.712; P < 0.001) and prostate volume (R = 0.706; P < 0.023) strongly correlate with LUTS whereas BMI, WC, INS, and FFA moderately correlate with the prevalence of bladder dysfunction. CONCLUSION Our results suggest that LUTS may be attributable in part to obesity and MetS. Validation of an in vivo model may lead to understand the underlying pathophysiological mechanisms of obesity-related LUTS in humans. Prostate 76:964-976, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Qiqi He
- Department of Urology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
- Department of Urology, Key Laboratory of Disease of Urological Systems, Gansu Nephro-Urological Clinical Center, Second Hospital of Lanzhou University, Lanzhou, Gansu, China
| | - Melissa A. Babcook
- Department of Urology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Sanjeev Shukla
- Department of Urology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Eswar Shankar
- Department of Urology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Zhiping Wang
- Department of Urology, Key Laboratory of Disease of Urological Systems, Gansu Nephro-Urological Clinical Center, Second Hospital of Lanzhou University, Lanzhou, Gansu, China
| | - Guiming Liu
- Department of Surgery, MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio 44109
| | - Bernadette O. Erokwu
- Department of Radiology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Chris A. Flask
- Department of Radiology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio 44106
- Department of Pediatrics, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Lan Lu
- Department of Urology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
- Department of Radiology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Firouz Daneshgari
- Department of Surgery, MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio 44109
| | - Gregory T. MacLennan
- Department of Pathology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
| | - Sanjay Gupta
- Department of Urology, Case Western Reserve University & University Hospitals Case Medical Center, Cleveland, Ohio 44106
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15
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Kendig DM, Ets HK, Moreland RS. Effect of type II diabetes on male rat bladder contractility. Am J Physiol Renal Physiol 2016; 310:F909-22. [PMID: 26823284 PMCID: PMC4867315 DOI: 10.1152/ajprenal.00511.2015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 01/20/2016] [Indexed: 12/17/2022] Open
Abstract
Type II diabetes is the most prevalent form of diabetes. One of the primary complications of diabetes that significantly affects quality of life is bladder dysfunction. Many studies on diabetic bladder dysfunction have been performed in models of type I diabetes; however, few have been performed in animal models of type II diabetes. Using the Zucker Diabetic Fatty (ZDF) rat model of type II diabetes, we examined the contractility and sensitivity of bladder smooth muscle in response to mediators of depolarization-induced contraction, muscarinic receptor-mediated contraction, ATP-induced contraction, and neurogenic contraction. Studies were performed at 16 and 27 wk of age to monitor the progression of diabetic bladder dysfunction. Voiding behavior was also quantified. The entire bladder walls of diabetic rats were hypertrophied compared with that of control rats. Contractility and sensitivity to carbachol and ATP were increased at 27 wk in bladder smooth muscle strips from diabetic rats, suggesting a compensated state of diabetic bladder dysfunction. Purinergic signaling was increased in response to exogenous ATP in bladders from diabetic animals; however, the purinergic component of neurogenic contractions was decreased. The purinergic component of neurogenic contraction was reduced by P2X receptor desensitization, but was unchanged by P2X receptor inhibition in diabetic rats. Residual and tetrodotoxin-resistant components of neurogenic contraction were increased in bladder strips from diabetic animals. Overall, our results suggest that in the male ZDF rat model, the bladder reaches the compensated stage of function by 27 wk and has increased responsiveness to ATP.
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Affiliation(s)
- Derek M Kendig
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania; and
| | - Hillevi K Ets
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania; and
| | - Robert S Moreland
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania; and Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia, Pennsylvnia
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