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Covarrubias C, Cammisotto PG, Shamout S, Campeau L. Decrease in the Ratio proBDNF/BDNF in the Urine of Aging Female Patients with OAB. Metabolites 2023; 13:723. [PMID: 37367881 DOI: 10.3390/metabo13060723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/22/2023] [Accepted: 05/31/2023] [Indexed: 06/28/2023] Open
Abstract
Imbalance in the levels of neurotrophins, growth factors crucial in the development, function, and survival of neurons is commonly observed in many pathological states. Concentrations of brain-derived neurotrophic factor (BDNF) and its precursor (proBDNF) were measured in the urine of a cohort of aging female patients with overactive bladder disease (OAB). When reported to creatinine, levels were similar between OAB patients and healthy controls. However, the ratio proBDNF/BDNF was significantly decreased in the OAB group. Receiver operating characteristic (ROC) curve analysis of the ratio proBDNF/BDNF displayed a good diagnostic value for OAB (AUC = 0.729). Clinical questionnaires of symptom severity (OABSS and IIQ-7) were negatively correlated with this ratio. On the other hand, microRNAs (miRNA) involved in proBDNF gene translation were expressed at comparable levels between groups. However, urinary enzymatic activity of matrix metalloproteinase-9 (MMP-9), the enzyme that cleaves proBDNF into BDNF, was increased in OAB compared to controls. Levels of miR-491-5p, the main miRNA that downregulates MMP-9 synthesis, were greatly decreased in urine from OAB patients. These results suggest that the ratio proBDNF/BDNF could be useful in the phenotyping of OAB in an aging population, and the difference could originate from enhanced MMP-9 enzymatic activity rather than translational control.
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Affiliation(s)
| | | | - Samer Shamout
- Lady Davis Institute, McGill University, Montreal, QC H3A 0G4, Canada
| | - Lysanne Campeau
- Lady Davis Institute, McGill University, Montreal, QC H3A 0G4, Canada
- Urology Department, Jewish General Hospital, Montreal, QC H3T 1E2, Canada
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Tellechea LM, Freeman S, Agalliu I, Laudano MA, Suadicani SO, Abraham N. A Feasibility Study to Evaluate Changes in Urinary Metabolites after OnabotulinumtoxinA Injection for Refractory Overactive Bladder. Metabolites 2022; 12:metabo12090880. [PMID: 36144284 PMCID: PMC9504526 DOI: 10.3390/metabo12090880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/09/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022] Open
Abstract
Metabolomics analysis of urine before and after overactive bladder (OAB) treatment may demonstrate a unique molecular profile, allowing predictions of responses to treatment. This feasibility study aimed to correlate changes in urinary metabolome with changes in OAB symptoms after intravesical onabotulinumtoxinA (BTX-A) injections for refractory OAB. Women 18 years or older with non-neurogenic refractory OAB were recruited to complete OAB-V8 questionnaires and submit urine samples before and after 100 units intravesical BTX-A injection. Samples were submitted to CE-TOFMS metabolomics profiling. Data were expressed as percent of change from pre-treatment and were correlated with OAB-V8 score improvement. Urinary metabolite changes in the OAB-V8 groups were compared using the Kruskal–Wallis test, and associations between metabolites and OAB-V8 scores were examined using quantile regression analysis. Of 61 urinary metabolites commonly detected before and after BTX-A, there was a statistically significant decrease in adenosine and an increase in N8-acetylspermidine and guanidinoacetic acid levels associated with OAB score improvement, suggesting that intravesical BTX-A injection modifies the urinary metabolome. These urinary metabolites could provide insight into OAB pathophysiology and help identify patients who would benefit most from chemodenervation.
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Affiliation(s)
- Laura M. Tellechea
- Department of Obstetrics & Gynecology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Samantha Freeman
- Department of Urology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Ilir Agalliu
- Department of Urology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Melissa A. Laudano
- Department of Urology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Sylvia O. Suadicani
- Department of Urology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Correspondence: (S.O.S.); (N.A.)
| | - Nitya Abraham
- Department of Urology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Correspondence: (S.O.S.); (N.A.)
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Urinary Levels of miR-491-5p and miR-592 as Potential Diagnostic Biomarkers in Female Aging Patients with OAB: A Pilot Study. Metabolites 2022; 12:metabo12090820. [PMID: 36144224 PMCID: PMC9501158 DOI: 10.3390/metabo12090820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 11/17/2022] Open
Abstract
Women with overactive bladder syndrome (OAB) have a lower urinary ratio of nerve growth factor (NGF) to its precursor (proNGF) compared to healthy controls. MicroRNAs related to NGF and proNGF metabolism and to their receptors may be present in urine and may possess diagnostic value. Urine and blood samples from 20 control and 20 OAB women (50–80 years) were obtained, together with validated questionnaires and other clinical parameters. The relative expression of urinary microRNAs was measured with RT-qPCR. MiR-491-5p, which negatively controls the translation of the matrix metalloproteinase-9 (MMP-9), the main enzyme degrading NGF, was significantly decreased in OAB. Similarly, miR-592, which represses p75NTR receptor synthesis, was down-regulated in OAB. Age, renal function and insulin resistance did not affect these results. ROC curves confirmed the high sensitivity of miR-491-5p and miR-592 for diagnosis. On the other hand, miRNAs involved in the expression of proNGF, of survival receptor TrkA and of markers of nerve integrity were similar between groups. The detection of miR-491-5p and miR-592 in urine could be a useful and non-invasive tool for the diagnosis of OAB syndrome in aging women.
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Itaconate as an inflammatory mediator and therapeutic target in cardiovascular medicine. Biochem Soc Trans 2021; 49:2189-2198. [PMID: 34665229 PMCID: PMC8589439 DOI: 10.1042/bst20210269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/23/2021] [Accepted: 09/28/2021] [Indexed: 01/11/2023]
Abstract
Inflammation is a critical component of cardiovascular disease (CVD), encompassing coronary artery disease (CAD), cerebrovascular events and heart failure and is the leading cause of mortality worldwide. In recent years, metabolism has been placed centrally in the governance of the immune response. Termed immunometabolism, immune cells adapt cellular metabolic pathways to meet demands of activation and thus function. This rewiring influences not only the bioenergetics of the cell but altered metabolites act as signalling molecules to regulate cellular response. In this review, we focus on the TCA cycle derivative, itaconate, as one such metabolite with promising immunomodulatory and therapeutic potential in inflammatory cardiovascular disease.
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Kira S, Miyamoto T, Tsuchiya S, Nakagomi H, Ihara T, Sawada N, Takeda M, Mitsui T. Potential Targets for Overactive Bladder in Older Men Based on Urinary Analysis of Metabolomics. Urol Int 2021; 106:672-678. [PMID: 34569539 DOI: 10.1159/000518300] [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: 03/26/2021] [Accepted: 05/21/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE We investigated the association between overactive bladder (OAB) and urinary metabolites in men. METHODS This prospective observational study included 42 men aged 65-80 years. The 3-day frequency volume chart (FVC), International Prostate Symptom Score (IPSS), and quality of life score were adapted to assess the micturition behavior. Participants with IPSS urgency score ≥2 were included in the OAB group, and those with IPSS urgency score <2 were included in the control group. We performed a comprehensive metabolomic analysis using urine samples. Metabolites were compared between the groups using an unpaired t test and Fisher's exact test in a nonadjusted analysis. Multivariable logistic regression analysis was performed to investigate the association between OAB and the metabolites. RESULTS Overall, 23 men were included in the OAB group and 19 in the control group. There were no differences in the background factors except age between the groups. FVC analysis demonstrated that nocturnal urine volume, 24-h micturition frequency, and nocturnal micturition frequency were significantly higher, and the maximum voided volume was significantly lower in the OAB group than in the controls. Metabolomic analysis revealed 14 metabolites that were differentially expressed between the groups. Multivariate analysis indicated that an increase in the levels of 5-iso prostaglandin F2α-VI (5-iPF2a-VI) and 5-methoxyindoleacetic acid was associated with OAB. CONCLUSION Abnormal urinary metabolites, including metabolites in the tryptophan (5-methoxyindoleacetic acid, 3-indoleacetonitrile, and 3-hydroxyanthranilic acid) and arachidonic acid (5-iPF2a-VI) pathways, play a role in the pathogenesis of OAB in older men.
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Affiliation(s)
- Satoru Kira
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Tatsuya Miyamoto
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Sachiko Tsuchiya
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Hiroshi Nakagomi
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Tatsuya Ihara
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Norifumi Sawada
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Masayuki Takeda
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
| | - Takahiko Mitsui
- Department of Urology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
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Winterhoff M, Chen F, Sahini N, Ebensen T, Kuhn M, Kaever V, Bähre H, Pessler F. Establishment, Validation, and Initial Application of a Sensitive LC-MS/MS Assay for Quantification of the Naturally Occurring Isomers Itaconate, Mesaconate, and Citraconate. Metabolites 2021; 11:metabo11050270. [PMID: 33925995 PMCID: PMC8146994 DOI: 10.3390/metabo11050270] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/08/2021] [Accepted: 04/13/2021] [Indexed: 01/16/2023] Open
Abstract
Itaconate is derived from the tricarboxylic acid (TCA) cycle intermediate cis-aconitate and links innate immunity and metabolism. Its synthesis is altered in inflammation-related disorders and it therefore has potential as clinical biomarker. Mesaconate and citraconate are naturally occurring isomers of itaconate that have been linked to metabolic disorders, but their functional relationships with itaconate are unknown. We aimed to establish a sensitive high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) assay for the quantification of itaconate, mesaconate, citraconate, the pro-drug 4-octyl-itaconate, and selected TCA intermediates. The assay was validated for itaconate, mesaconate, and citraconate for intra- and interday precision and accuracy, extended stability, recovery, freeze/thaw cycles, and carry-over. The lower limit of quantification was 0.098 µM for itaconate and mesaconate and 0.049 µM for citraconate in 50 µL samples. In spike-in experiments, itaconate remained stable in human plasma and whole blood for 24 and 8 h, respectively, whereas spiked-in citraconate and mesaconate concentrations changed during incubation. The type of anticoagulant in blood collection tubes affected measured levels of selected TCA intermediates. Human plasma may contain citraconate (0.4-0.6 µM, depending on the donor), but not itaconate or mesaconate, and lipopolysaccharide stimulation of whole blood induced only itaconate. Concentrations of the three isomers differed greatly among mouse organs: Itaconate and citraconate were most abundant in lymph nodes, mesaconate in kidneys, and only citraconate occurred in brain. This assay should prove useful to quantify itaconate isomers in biomarker and pharmacokinetic studies, while providing internal controls for their effects on metabolism by allowing quantification of TCA intermediates.
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Affiliation(s)
- Moritz Winterhoff
- TWINCORE Centre for Experimental and Clinical Infection Research, 30625 Hannover, Germany; (M.W.); (F.C.); (N.S.); (M.K.)
| | - Fangfang Chen
- TWINCORE Centre for Experimental and Clinical Infection Research, 30625 Hannover, Germany; (M.W.); (F.C.); (N.S.); (M.K.)
| | - Nishika Sahini
- TWINCORE Centre for Experimental and Clinical Infection Research, 30625 Hannover, Germany; (M.W.); (F.C.); (N.S.); (M.K.)
| | - Thomas Ebensen
- Helmholtz Centre for Infection Research (HZI), 38124 Braunschweig, Germany;
| | - Maike Kuhn
- TWINCORE Centre for Experimental and Clinical Infection Research, 30625 Hannover, Germany; (M.W.); (F.C.); (N.S.); (M.K.)
| | - Volkhard Kaever
- Research Core Unit Metabolomics, Hannover Medical School, 30625 Hannover, Germany; (V.K.); (H.B.)
| | - Heike Bähre
- Research Core Unit Metabolomics, Hannover Medical School, 30625 Hannover, Germany; (V.K.); (H.B.)
| | - Frank Pessler
- TWINCORE Centre for Experimental and Clinical Infection Research, 30625 Hannover, Germany; (M.W.); (F.C.); (N.S.); (M.K.)
- Helmholtz Centre for Infection Research (HZI), 38124 Braunschweig, Germany;
- Centre for Individualised Infection Medicine, 30625 Hannover, Germany
- Correspondence: or
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Omran A, Leca BM, Oštarijaš E, Graham N, Da Silva AS, Zaïr ZM, Miras AD, le Roux CW, Vincent RP, Cardozo L, Dimitriadis GK. Metabolic syndrome is associated with prostate enlargement: a systematic review, meta-analysis, and meta-regression on patients with lower urinary tract symptom factors. Ther Adv Endocrinol Metab 2021; 12:20420188211066210. [PMID: 34900218 PMCID: PMC8664322 DOI: 10.1177/20420188211066210] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/25/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Metabolic syndrome (MetS) is defined by at least three of the following five criteria: blood pressure ⩾130/85 mmHg, fasting blood glucose ⩾5.6 mmol/l, triglycerides concentration ⩾1.7 mmol/l, waist circumference ⩾102 cm (for men), and high-density lipoprotein cholesterol concentration <1.03 mmol/l (for men). MetS has been associated with worse lower urinary tract symptoms (LUTS) and higher International Prostate Symptom questionnaire scores. MATERIALS AND METHODS MEDLINE, Cochrane, ClinicalTrials.gov, and SCOPUS were critically appraised for all peer-reviewed manuscripts that suitably fulfilled our protocol's inclusion criteria established a priori. Meta-analytical and meta-regression calculations were performed in R using the Sidik-Jonkman and Hartung-Knapp random effects model and predefined covariates. RESULTS A total of 70 studies (n = 90,206) were included in qualitative synthesis. From these, 60 studies focused on MetS and LUTS: 44 reported positive correlations, 5 reported negative correlations, 11 reported no association, and 10 studies focused on MetS and total prostate volume (TPV). MetS positively correlated with moderate LUTS [odds ratio (OR) = 1.56, 95% confidence interval (CI) = 1.35-1.80], severe LUTS (OR = 2.35, 95% CI = 1.82-3.03), overactive bladder (OAB; OR = 3.2, 95% CI = 1.6-5.8), and nocturia severity (OR = 2.509, 95% CI = 1.571-4.007) at multivariate analysis. A total of 30 studies (n = 22,206) were included in meta-analysis; MetS was significantly associated with higher TPV (mean differences = 4.4450 ml, 95% CI = 2.0177-6.8723), but no significant predictive factors for effect sizes were discovered. CONCLUSION Our meta-analysis demonstrates a significant association between the aggravating effects of MetS, which commonly coexists with obesity and benign prostate enlargement.
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Affiliation(s)
| | | | - Eduard Oštarijaš
- Institute for Translational Medicine, University of Pecs Medical School, Pecs, Hungary
| | - Natasha Graham
- Department of Obstetrics & Gynaecology, Queen Elizabeth Hospital, London, UK
| | - Ana Sofia Da Silva
- Department of Urogynaecology, King’s College Hospital NHS Foundation Trust, London, UK
| | | | - Alexander D. Miras
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Carel W. le Roux
- Diabetes Complication Research Centre, School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Royce P. Vincent
- Faculty of Life Sciences and Medicine, School of Life Course Sciences, King’s College London, London, UKDepartment of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, London, UK
| | - Linda Cardozo
- Department of Urogynaecology, King’s College Hospital NHS Foundation Trust, London, UK
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Imbalance of nerve growth factor metabolism in aging women with overactive bladder syndrome. World J Urol 2020; 39:2055-2063. [PMID: 32870355 DOI: 10.1007/s00345-020-03422-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 08/21/2020] [Indexed: 10/23/2022] Open
Abstract
PURPOSE Given the disputable link between nerve growth factor (NGF) and overactive bladder syndrome (OAB) and the lack of studies on its precursor (proNGF) in OAB, the aim of the study was to identify changes in the urinary levels of NGF and its proteolytic enzymes in aging women with OAB. METHODS We examined the urinary proNGF/NGF ratio and its processing enzymes in aging women (50-80 years), comparing 20 controls and 20 subjects with OAB. RESULTS In contrast to previous reports correlating NGF to OAB symptoms, we found that proNGF/NGF ratio in the OAB group was twice as high compared to controls (p = 0.009) with a lower NGF levels in women with OAB without statistical significance [1.36 (Q1, Q3: 0.668, 2.39) vs. 1.7 (Q1, Q3: 1.27, 3.045) pg/mg creatinine in control group, p = 0.05]. Enzymatic activity of MMP-7, the main enzyme for extracellular proNGF maturation, was significantly increased in the OAB group and correlated positively with scores of OAB symptoms questionnaires. However, this was counteracted by several-folds increase in the MMP-9 enzyme responsible for NGF proteolysis. While these findings highlight the importance of changes in the proteolytic enzymes to maintain proNGF/NGF balance in OAB, analysis of covariates showed that these changes were attributed to age, insulin resistance and renal function. CONCLUSION NGF proteolysis imbalance can be clinically meaningful in OAB related to aging, rendering it as a potential therapeutic target. However, other age-related factors such as insulin resistance and renal function may contribute to the relationship between NGF and aging-related OAB phenotype.
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Rada MP, Ciortea R, Măluţan AM, Doumouchtsis SK, Bucuri CE, Clim A, Roman A, Mihu D. The profile of urinary biomarkers in overactive bladder. Neurourol Urodyn 2020; 39:2305-2313. [PMID: 32813897 DOI: 10.1002/nau.24487] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/06/2020] [Indexed: 12/20/2022]
Abstract
AIMS In overactive bladder (OAB) research, different biomarkers have been proposed as diagnostic tools and may be used to create individual patient profiles. Assessing the diagnostic performance of biomarkers would better outline their utility. Therefore, our aim was to investigate the diagnostic value of four urinary biomarkers: human brain derived neurotrophic factor (hBDNF), malondialdehyde (MDA), h nerve growth factor (hNGF) and h 8-hydroxydeoxyguanosine in women with OAB. These are neurotrophins/oxidative stress markers that have been linked to lower urinary tract symptoms. METHODS A total of 105 women were included in the study and distributed in two groups: a group with OAB (n = 53) and a control group (n = 50). The levels of the biomarkers were determined using enzyme-linked immunosorbent assay technique and they were compared between the groups. If the Mann-Whitney test demonstrated a statistically significant difference, receiver operating curves (ROC) analysis was undertaken. RESULTS When normalized to urinary creatinine, hBDNF, MDA, and hNGF showed significantly increased values in women with OAB as compared to controls, whereas 8-OHdG showed no significant difference. The diagnostic performance of these biomarkers was analyzed based on the area under the ROC curve (AUC). MDA had the highest AUC (0.75), followed by hNGF (0.69) and hBDNF (0.67). CONCLUSIONS Our findings suggest that MDA, a relatively novel biomarker in OAB research, has a fair performance as a diagnostic tool for OAB. Moreover, urinary neurotrophins (NGF and BDNF) as biomarkers may have a role in the diagnostic pathways of women with OAB symptoms.
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Affiliation(s)
- Maria Patricia Rada
- 2nd Department of Obstetrics-Gynaecology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Răzvan Ciortea
- 2nd Department of Obstetrics-Gynaecology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Andrei Mihai Măluţan
- 2nd Department of Obstetrics-Gynaecology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Stergios K Doumouchtsis
- Department of Obstetrics and Gynaecology, Epsom & St Helier University Hospitals NHS Trust, UK
- Institute of Medical and Biomedical Education, St George's University of London, London, UK
- Laboratory of Experimental Surgery and Surgical Research N S Christeas, Athens University Medical School, Athens, Greece
- American University of the Caribbean School of Medicine, Florida
| | - Carmen Elena Bucuri
- 2nd Department of Obstetrics-Gynaecology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Adelina Clim
- 2nd Department of Obstetrics-Gynaecology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Andrei Roman
- Department of Radiology, "Prof. Dr. Ion Chiricuţă" Oncology Institute Cluj-Napoca, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Dan Mihu
- 2nd Department of Obstetrics-Gynaecology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Urine Proteomic Study in OAB Patients-Preliminary Report. J Clin Med 2020; 9:jcm9051389. [PMID: 32397227 PMCID: PMC7290998 DOI: 10.3390/jcm9051389] [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: 03/19/2020] [Revised: 04/30/2020] [Accepted: 05/06/2020] [Indexed: 12/21/2022] Open
Abstract
Overactive bladder (OAB) is defined by International Urogynecological Association (IUGA)/ International Continence Society (ICS) as urinary urgency, usually accompanied by frequency and nocturia, with or without urgency urinary incontinence, in the absence of urinary tract infection (UTI) or other obvious pathology. The pathophysiology of OAB is not well understood, however a number of different proteins and cytokines including vascular cell adhesion molecule-1 (VCAM-1) were found to be important in regulating structural integrity of the bladder wall. Proteome analysis may thus provide significant information with regard to OAB and may help in discovering novel diagnostic disease biomarkers. Sixteen Caucasian women aged 32-78 were included in the study. Patients were placed within 2 groups: OAB group (n = 8) and control group (n = 8). Urine samples were collected, immediately preserved in a protease inhibitor mixture, and frozen at -80 ℃. All samples were then further processed according to the isobaric tags for relative and absolute quantification (iTRAQ) manual. Proteins were labeled and analyzed in the mass spectrometer conjugated with liquid chromatograph (data are available via ProteomeXchange with the identifier PXD017799). There were no statistically significant differences in demographic data between control and OAB groups. VCAM-1 was the only protein that reached statistical significance as a differentiating protein in both of our experiments assessing the proteomic constitution in OAB patients. Studies involving a larger group of patients may provide further information on urinary bladder proteomics.
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