1
|
Fujita N, Momota M, Ishida M, Iwane T, Hatakeyama S, Yoneyama T, Hashimoto Y, Yoshikawa K, Yamaya K, Ohyama C. Association of oxidative stress with erectile dysfunction in community-dwelling men and men on dialysis. Aging Male 2022; 25:193-201. [PMID: 35916472 DOI: 10.1080/13685538.2022.2103113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
OBJECTIVES To investigate the association between oxidative stress and erectile dysfunction (ED) in community-dwelling men and men on dialysis. METHODS This cross-sectional study included 398 community-dwelling men and 42 men on dialysis. Oxidative stress was assessed using 8-hydroxy-2'-deoxyguanosine (8-OHdG). Univariable and multivariable logistic regression analyses were performed to evaluate the association between oxidative stress and ED. RESULTS Spearman's rank correlation test showed no significant correlation between urine 8-OHdG levels and the 5-Item International Index of Erectile Function scores in community-dwelling men (ρ = -0.005, p = 0.917) and between plasma 8-OHdG levels and the Sexual Health Inventory for Men scores in men on dialysis (ρ = 0.166, p = 0.295). In community-dwelling men, univariable and multivariable analyses revealed that urine 8-OHdG level was not significantly associated with ED (odds ratio [OR]: 1.005, 95% confidence interval [CI]: 0.884-1.144, p = 0.934; OR: 0.930, 95% CI: 0.798-1.084, p = 0.353; respectively). In men on dialysis, univariable analyses revealed that plasma 8-OHdG level was not significantly associated with severe ED (OR: 0.967, 95% CI: 0.876-1.066, p = 0.498). CONCLUSIONS Oxidative stress was not significantly associated with ED prevalence and severity in community-dwelling men and men on dialysis.
Collapse
Affiliation(s)
- Naoki Fujita
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Masaki Momota
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Mizuri Ishida
- Department of Innovation Center for Health Promotion, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Takuro Iwane
- Department of Innovation Center for Health Promotion, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Shingo Hatakeyama
- Department of Advanced Blood Purification Therapy, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Takahiro Yoneyama
- Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yasuhiro Hashimoto
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | | | - Kanemitsu Yamaya
- Department of Urology, Oyokyo Kidney Research Institute, Hirosaki, Japan
| | - Chikara Ohyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
- Department of Advanced Blood Purification Therapy, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
- Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| |
Collapse
|
2
|
Abd Eldaiem MS, Ahmed SA, Elsaeid AA, Hassan AA, Ghoneim DF, Ibrahim AM. Light-Emitting Diode Laser Therapy for Hyperoxia-Induced Retinal Abnormalities. J Lasers Med Sci 2021; 12:e64. [DOI: 10.34172/jlms.2021.64] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 06/27/2021] [Indexed: 01/04/2023]
Abstract
Introduction: Hyperoxygenation is linked to numerous effects in a variety of organ systems. It can cause tissue damage by generating reactive oxygen species (ROS), increasing oxidative stress, and inducing cell death by apoptosis. The present study aimed to evaluate the effects of low-level laser therapy on the retina in response to acute hyperoxia in animals. Methods: A total of 70 Wistar albino rats were evaluated in the present study: 10 rats were designated as a control group, and the rest were exposed to hyperoxia (O2 , 90%) for 3 days, 1 week, and 2 weeks (20 rats each). Each group was divided into two subgroups (n=10), one of which was designated as hyperoxia only. The other was treated with a 670 nm light-emitting diode laser (2 sessions/one week, ~ 9.0 J/cm2 ) in each eye. The animals were euthanized, and their retinas were dissected for analysis of protein content, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), total antioxidant capacity (TAC), hydrogen peroxide (H2 O2 ), malondialdehyde (MDA), and histological examination. Results: We found that two weeks of hyperoxia induced an increase in retinal protein content (P<0.001), an alteration in the intensities and molecular weights of protein fractions, a significant decrease in the TAC level (P<0.01), and a noticeable increase in H2 O2 and MDA levels (P<0.001). Histological examination revealed fragmentation of the photoreceptors and neovascularization in the outer and inner plexiform layers. Furthermore, the data showed remarkable improvement in the retinal protein contents, oxidative state, and retinal structure after light-emitting diode laser therapy. Conclusion: Light-emitting diode laser therapy was found to be a useful treatment paradigm for reducing hyperoxia-induced retinal damage.
Collapse
Affiliation(s)
| | - Salwa Abdelkawi Ahmed
- Biophysics and Laser Science Unit, Vision Sciences Department, Research Institute of Ophthalmology, Giza, Egypt
| | | | - Aziza Ahmed Hassan
- Ophthalmic Unit, National Institute of Laser enhanced Science, Cairo University, Cairo, Egypt
| | - Dina Fouad Ghoneim
- Ophthalmic Unit, National Institute of Laser enhanced Science, Cairo University, Cairo, Egypt
| | | |
Collapse
|
3
|
Majewski M, Jurgoński A. The Effect of Hemp ( Cannabis sativa L.) Seeds and Hemp Seed Oil on Vascular Dysfunction in Obese Male Zucker Rats. Nutrients 2021; 13:nu13082575. [PMID: 34444734 PMCID: PMC8398088 DOI: 10.3390/nu13082575] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/17/2021] [Accepted: 07/26/2021] [Indexed: 12/25/2022] Open
Abstract
Seeds of industrial hemp (Cannabis sativa L.) contain a large amount of protein (26.3%), dietary fiber (27.5%), and fatty acids (33.2%), including linoleic, α-linolenic, and some amount of γ-linolenic acid. In our study, obese male Zucker rats (n = 6) at 8 weeks of age were supplemented for a further 4 weeks with either ground hemp seeds (12% diet) or lipid fractions in the form of hemp seed oil (4% diet). Hemp oil decreased blood plasma HDL-cholesterol (x0.76, p ≤ 0.0001), triglycerides (x0.55, p = 0.01), and calculated atherogenic parameters. Meanwhile, hemp seeds decreased HDL-cholesterol (x0.71, p ≤ 0.0001) and total cholesterol (x0.81, p = 0.006) but not the atherogenic index. The plasma antioxidant capacity of water-soluble compounds was decreased by the seeds (x0.30, p = 0.0015), which in turn was associated with a decrease in plasma uric acid (x0.18, p = 0.03). Dietary hemp seeds also decreased plasma urea (x0.80, p = 0.02), while the oil decreased the plasma total protein (x0.90, p = 0.05). Hemp seeds and the oil decreased lipid peroxidation in the blood plasma and in the heart (reflected as malondialdehyde content), improved contraction to noradrenaline, and up-regulated the sensitivity of potassium channels dependent on ATP and Ca2+. Meanwhile, acetylcholine-induced vasodilation was improved by hemp seeds exclusively. Dietary supplementation with ground hemp seeds was much more beneficial than the oil, which suggests that the lipid fractions are only partially responsible for this effect.
Collapse
Affiliation(s)
- Michał Majewski
- Department of Pharmacology and Toxicology, Faculty of Medicine, UWM, 10-082 Olsztyn, Poland
- Correspondence: (M.M.); (A.J.); Tel.: +48-89-524-56-68 (M.M.); +48-89-523-46-01 (A.J.)
| | - Adam Jurgoński
- Division of Food Science, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, 10-748 Olsztyn, Poland
- Correspondence: (M.M.); (A.J.); Tel.: +48-89-524-56-68 (M.M.); +48-89-523-46-01 (A.J.)
| |
Collapse
|
4
|
Thiol/Disulfide Homeostasis in Patients With Erectile Dysfunction. J Sex Med 2020; 17:1934-1941. [PMID: 32788052 DOI: 10.1016/j.jsxm.2020.07.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/09/2020] [Accepted: 07/15/2020] [Indexed: 11/23/2022]
Abstract
BACKGROUND Although there are no sufficient data on association between oxidative stress and erectile dysfunction (ED), numerous studies have reported that imbalance between the formation of reactive oxygen species and body's antioxidant defenses may play a role in the pathogenesis of ED. AIM The aim of this study was to determine and compare the oxidant and antioxidant status in patients with ED and healthy controls with a novel automated assay for thiol/disulphide homeostasis test. METHODS Our study included 123 patients with ED and 90 healthy individuals. ED was evaluated by asking questions 1-5 and 15 of the International Index of Erectile Function form. In this study, we used Erel and Neselioglu's thiol/disulfide homeostasis test, which is one of the novel methods that can measure both variables of the oxidative/antioxidative balance individually and collectively. OUTCOMES This method measured serum antioxidant (total thiol [toSH], native thiol [SH]) and oxidant (disulfide [SS]) levels. The statistical comparisons were performed between patients with ED (ED+ group) and without ED (ED- group) first and then within the ED+ group. After toSH, SH, and SS levels were determined; SS/toSH%, SS/SH%, and SH/toSH% levels were analyzed separately and compared statistically. RESULTS We found a significant difference between ED- and ED+ groups in terms of toSH, SH, SS/toSH%, and SS/SH% ratios. SS parameters were increased in patients with ED, but there was no significant difference in terms of SS and SH/toSH% values. CLINICAL IMPLICATIONS Clarification of the factors involved in the etiology of ED such as oxidative/antioxidative balance may open new grounds in the early diagnosis and treatment of the disease. STRENGTHS & LIMITATIONS It is a prospective, randomized clinical study with the use of a novel, reliable, and fully automated technique. The limitations of the study are use of a subjective tool such as the International Index of Erectile Function, obtaining blood samples from the peripheral vein instead of penile cavernosal tissue, and relatively small sample size. CONCLUSION The results of this study showed that thiol/disulfide homeostasis is altered in ED, and this imbalance may be a factor in its pathophysiology. We determined that as ED gets more severe, toSH and SH parameters decrease, whereas SS parameter increases. Micoogullari U, Karatas OF, Kisa E, et al. Thiol/Disulfide Homeostasis in Patients With Erectile Dysfunction. J Sex Med 2020;17:1934-1941.
Collapse
|
5
|
Roumeguère T, Van Antwerpen P, Fathi H, Rousseau A, Vanhamme L, Franck T, Costa C, Morelli A, Lelubre C, Hauzeur C, Raes M, Serteyn D, Wespes E, Vanhaeverbeek M, Zouaoui Boudjeltia K. Relationship between oxidative stress and erectile function. Free Radic Res 2017; 51:924-931. [PMID: 29041845 DOI: 10.1080/10715762.2017.1393074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The aim of this study was to investigate markers of inflammation and oxidative stress in the corpus cavernosum (CC) and to compare levels of inflammatory markers recorded in CC to venous blood from the arm to examine the potential impact of inflammatory parameters on erectile function and endothelial dysfunction in vitro. Ninety-seven patients with no complaint of erectile dysfunction (ED) at inclusion were prospectively included and completed the Erectile Function domain of the IIEF questionnaire. Several parameters, including lipids, MPO-dependent oxidised LDL (Mox-LDL), IL-8, IL-18, were measured. After RNA extraction, the expression of eNOS was analysed. A paired t-test was used for comparisons between arm and CC blood results. A two-way ANOVA was used to estimate the effects of IL-18 and IL-8 on the IIEF score. Mean patient age was 59 ± 14.5 years. IL-18, Mox-LDL, and Mox-LDL/ApoB levels were significantly increased in CC compared to arm blood. The IIEF score was correlated with IL-18 levels in the venous blood (R = -0.31, p = .003) and in the CC (R = -0.37, p = .004) and with IL-8 (R = -0.31, p = .009 and R = -0.28, respectively, p = .02). There was a significant effect with the IL-18 on IIEF potentiated by high serum IL-8 concentrations. IL-18 and Mox-LDL significantly decreased eNOS mRNA expression in human aortic endothelial cell line (HAEC). These preliminary results address the importance of inflammation in the CC and highlight a difference in marker concentrations between venous and CC blood. However, they do not show any difference in terms of clinical erectile score predictivity. Involvement of inflammatory cytokines isolated in CC in the genesis of ED requires further studies.
Collapse
Affiliation(s)
- Thierry Roumeguère
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium.,b Department of Urology , Erasme University Hospital, ULB , Brussels , Belgium
| | - Pierre Van Antwerpen
- c Laboratory of Pharmaceutical Chemistry , Institute of Pharmacy, ULB , Brussels , Belgium
| | - Henda Fathi
- b Department of Urology , Erasme University Hospital, ULB , Brussels , Belgium
| | - Alexandre Rousseau
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| | - Luc Vanhamme
- d Institute for Molecular Biology and Medicine (IBMM), ULB , Gosselies , Belgium
| | - Thierry Franck
- e Center for Oxygen Research and Development , Institute of Chemistry B6a, University of Liège , Liège , Belgium
| | - Carla Costa
- f Department of Experimental Biology and Department of Biochemistry (U38-FCT), Faculty of Medicine of Porto , Porto , Portugal
| | - Annamaria Morelli
- g Sexual Medicine and Andrology Unit, Department of Clinical Physiopathology , University of Florence , Florence , Italy
| | - Christophe Lelubre
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| | - Claude Hauzeur
- h Department of Urology , CHU de Charleroi , Charleroi , Belgium
| | - Martine Raes
- i Namur Research Institute for Life Sciences , Namur University , Namur , Belgium
| | - Didier Serteyn
- e Center for Oxygen Research and Development , Institute of Chemistry B6a, University of Liège , Liège , Belgium
| | - Eric Wespes
- h Department of Urology , CHU de Charleroi , Charleroi , Belgium
| | - Michel Vanhaeverbeek
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| | - Karim Zouaoui Boudjeltia
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| |
Collapse
|
6
|
Aksoy N, Dogan Y, Iriadam M, Bitiren M, Uzer E, Ozgonul A, Aksoy S. Protective and therapeutic effects of licorice in rats with acute tubular necrosis. J Ren Nutr 2012; 22:336-43. [PMID: 22047711 PMCID: PMC7111674 DOI: 10.1053/j.jrn.2011.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2011] [Revised: 05/28/2011] [Accepted: 07/11/2011] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES Various protective and therapeutic effects such as antioxidant, anti-inflammatory, anticancer, antihistaminic, and antibacterial effects have been depicted for licorice. However, its biological effects in the kidney are still not clear. Therefore, we aimed to investigate the efficiency of licorice in rats with gentamicin (GM)-induced acute tubular necrosis. DESIGN AND METHODS Rats were randomized into the control group (only saline for 12 days), licorice group (licorice for 12 days), GM group (GM for 12 days), GM + licorice group, and licorice-treated GM group (licorice for 12 days after taking GM for 12 days). Blood urea, creatinine, and uric acid levels were measured and histopathological analyses of the kidneys were performed. The oxidative side of oxidant-antioxidant balance was evaluated by detecting lipid peroxidation (LPO) and total peroxide levels, and antioxidative side was determined by measuring total antioxidant capacity (TAC) and reduced glutathione (GSH) levels in plasma and kidney tissues. RESULTS The oxidant-antioxidant balance seemed to be shifted to the oxidative side in the GM group when compared with the control and GM + licorice groups. In GM group, biochemical profiles showed a remarkable increase in blood uric acid, urea, and creatinine levels, and depletion of renal tissue and plasma TAC and GSH levels. In addition, histopathologic studies revealed severe acute tubular necrosis, congestion, and hyaline casts, verifying GM-induced nephrotoxicity. Licorice was effective in reduction of blood urea, creatinine, and uric acid levels, and also effective in decreasing the tubular necrosis score. Licorice treatment also significantly reduced LPO and total peroxide levels, and increased TAC and GSH levels in both renal tissue and blood. Moreover, these changes in rats subjected to the combined therapy (GM + licorice) were significantly less than those of GM group. CONCLUSIONS Licorice ameliorates GM-induced nephrotoxicity and oxidative damage by scavenging oxygen free radicals, decreasing LPO, and improving antioxidant defense.
Collapse
Affiliation(s)
- Nurten Aksoy
- Department of Biochemistry, Harran University, Sanliurfa, Turkey.
| | | | | | | | | | | | | |
Collapse
|
7
|
Etöz OA, Akçay H, Neşelioğlu S, Erel Ö, Alkan A. Total antioxidant capacity and total oxidant status of synovial fluids in patients with temporomandibular joint pain and dysfunction. Clin Oral Investig 2012; 16:1557-61. [PMID: 22249561 DOI: 10.1007/s00784-011-0666-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Accepted: 12/19/2011] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The objective of this study was to investigate whether a relationship exists between total antioxidant capacity (TAC) and total oxidant status (TOS) of synovial fluids (SFs) of temporomandibular joint (TMJ) pain patients with pain and dysfunction. MATERIALS AND METHODS Forty-two patients with TMJ pain were included in this study. TAC and TOS values of SFs were measured with a novel colorimetric method. Independent t test and correlations were used to analyze the data. RESULTS TAC of SFs in patients with TMJ pain and limited mouth opening (LMO; n = 21) were significantly lower (P = 0.03) than patients without LMO (n = 21). TOS of SF was negatively correlated with duration of the disease. There was no correlation between TAC, TOS, and VAS scores of the patients as well as age and maximum mouth opening values. CONCLUSIONS Antioxidant response to oxidative changes (TAC and TOS) in SF decreased as the stage of dysfunction increased. CLINICAL RELEVANCE Local administration of antioxidant agents might be considered in management of TMJ pain and dysfunction to prevent possible increased oxidative stress.
Collapse
Affiliation(s)
- Osman A Etöz
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Erciyes University, 38039 Kayseri, Turkey
| | | | | | | | | |
Collapse
|
8
|
Barassi A, Colpi GM, Piediferro G, Dogliotti G, Melzi D'Eril GV, Corsi MM. Oxidative Stress and Antioxidant Status in Patients with Erectile Dysfunction. J Sex Med 2009; 6:2820-5. [DOI: 10.1111/j.1743-6109.2009.01279.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
9
|
Etoz OA, Ataoglu H, Erel O, Celik H, Herken EN, Bayazit YA. Association of Serum Total Antioxidant Capacity and Total Oxidant Status with Pain Perception in Patients with Myofacial pain Dysfunction. Int J Neurosci 2009; 119:1282-91. [DOI: 10.1080/00207450902907482] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
10
|
Soukhova-O'Hare GK, Shah ZA, Lei Z, Nozdrachev AD, Rao CV, Gozal D. Erectile dysfunction in a murine model of sleep apnea. Am J Respir Crit Care Med 2008; 178:644-50. [PMID: 18535258 DOI: 10.1164/rccm.200801-190oc] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Erectile dysfunction (ED) is frequent in obstructive sleep apnea syndrome (OSAS). Chronic intermittent hypoxia (CIH), one of the hallmarks of OSAS, could mediate ED. OBJECTIVES To determine whether intermittent hypoxia during sleep affects erectile dysfunction in mice. METHODS Three groups of C57BL/6 mice were exposed to CIH for 5 or 24 weeks. Sexual function was evaluated by in vivo telemetry of corpus spongiosum pressure. Spontaneous erections, sexual activity during mating, and noncontact tests were assessed after 5 weeks of CIH and after treatment with tadalafil. Plasma testosterone was measured after 8 and 24 weeks of CIH, and the expression of nitric oxide synthase (NOS) isoforms was examined in penile tissue. MEASUREMENTS AND MAIN RESULTS Noncontact, spontaneous, and contact sexual activity in the mice was suppressed after CIH. Spontaneous erection counts decreased after the first week of CIH by 55% (P < 0.001) and remained unchanged thereafter. Recovery of erectile activity during normoxia for 6 weeks was incomplete. Compared with control mice, latencies for mounts and intromissions increased by 60- and 40-fold, respectively (P < 0.001), and the sexual activity index decreased sixfold. Tadalafil treatment significantly attenuated these effects. Immunoblot analyses of NOS proteins in the erectile tissue showed decreased expression of endothelial NOS after CIH (P < 0.01), with no changes in plasma testosterone levels after 8 and 24 weeks of CIH. CONCLUSIONS CIH during sleep is associated with decreased libido in mice. The decreased expression of endothelial NOS protein in erectile tissue and the favorable response to tadalafil suggest that altered nitric oxide mechanisms underlie CIH-mediated ED. No changes in testosterone emerge after intermittent hypoxia.
Collapse
Affiliation(s)
- Galia K Soukhova-O'Hare
- Kosair Children's Hospital Research Institute, University of Louisville, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA
| | | | | | | | | | | |
Collapse
|
11
|
Villalba N, Stankevicius E, Simonsen U, Prieto D. Rho kinase is involved in Ca2+ entry of rat penile small arteries. Am J Physiol Heart Circ Physiol 2008; 294:H1923-32. [PMID: 18223191 DOI: 10.1152/ajpheart.01221.2007] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Tonic physiological activity of RhoA/Rho kinase contributes to the maintenance of penile flaccidity through its involvement in the Ca(2+) sensitization of erectile tissue smooth muscle. The present study hypothesized that Rho kinase is also involved in the modulation of Ca(2+) entry induced by alpha(1)-adrenoceptor stimulation of penile arteries. Rat penile arteries were mounted in microvascular myographs for simultaneous measurements of intracellular Ca(2+) ([Ca(2+)](i)) and force. The Rho-kinase inhibitor Y-27632 markedly reduced norepinephrine-mediated electrically induced contractions and the increases in both [Ca(2+)](i) and tension elicited by the alpha(1)-adrenoceptor agonist phenylephrine (Phe). In contrast, the protein kinase C (PKC) inhibitor Ro-31-8220 reduced tension without altering the Phe-induced increase in [Ca(2+)](i). In the presence of nifedipine, Y-27632 still inhibited the non-L-type Ca(2+) signal and blunted Phe contraction. Y-27632 did not impair the capacitative Ca(2+) entry evoked by store depletion with cyclopiazonic acid but largely reduced the Ba(2+) influx stimulated by Phe in fura-2 AM-loaded arteries. The addition of Y-27632 to arteries depolarized with high KCl markedly reduced tension without changing [Ca(2+)](i). In alpha-toxin-permeabilized penile arteries stimulated with threshold Ca(2+) concentrations, Y-27632 inhibited the sensitization induced by either guanosine 5'-O-(3-thiotriphosphate) (GTPgammaS) or Phe in the presence of GTPgammaS. However, Y-27632 failed to alter contractions induced by a maximal concentration of free Ca(2+). These results suggest that Rho kinase, besides its contribution to the Ca(2+) sensitization of the contractile proteins, is also involved in the regulation of Ca(2+) entry through a nonselective cation channel activated by alpha(1)-adenoceptor stimulation in rat penile arteries.
Collapse
Affiliation(s)
- Nuria Villalba
- Dept. de Fisiología, Facultad de Farmacia, Univ. Complutense, 28040-Madrid, Spain
| | | | | | | |
Collapse
|
12
|
Devi PU, Devipriya D, Murugan S, Selvi S, Suja S, Chinnaswam P. Evaluation of Plasma Total Antioxidant Response and Total Peroxides in Different Symptoms of Schizophrenia Patients. ACTA ACUST UNITED AC 2007. [DOI: 10.3923/ijbc.2008.26.34] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
13
|
Altindag O, Erel O, Aksoy N, Selek S, Celik H, Karaoglanoglu M. Increased oxidative stress and its relation with collagen metabolism in knee osteoarthritis. Rheumatol Int 2006; 27:339-44. [PMID: 17096092 DOI: 10.1007/s00296-006-0247-8] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2006] [Accepted: 09/26/2006] [Indexed: 10/23/2022]
Abstract
The purpose of this study was to determine serum oxidative/antioxidative status in patients with knee osteoarthritis and its relation with prolidase activity, which plays an important role in collagen metabolism. Serum antioxidative status was evaluated by measuring total antioxidant capacity (TAC), thiol level and catalase enzyme activity in patients with osteoarthritis and in healthy controls. Serum oxidative status was evaluated by measuring total peroxide (TP) and lipid hydroperoxide. Oxidative stress index (OSI) was calculated. Prolidase enzyme activity was measured to investigate the collagen metabolism. Serum TAC, thiol level, catalase activity and prolidase activity were significantly lower in patients than in controls (P < 0.001, for all). In contrast, TP, lipid hydroperoxide and OSI values were significantly higher in patients than in controls (P < 0.001 for all). Further, prolidase activity was negatively correlated with TP and OSI, and positively correlated with TAC. The present results indicate that the oxidant parameters increased and antioxidant parameters decreased in patients with osteoarthritis; therefore, these patients may be exposed to a potent oxidative stress. Decreased collagen metabolism may be related with oxidative stress, which has a role in the ethiopathogenesis and/or in the progression of the disease.
Collapse
Affiliation(s)
- Ozlem Altindag
- Department of Physical Medicine and Rehabilitation, Medical Faculty, Research Hospital, Harran University, Sanliurfa, 63100, Turkey.
| | | | | | | | | | | |
Collapse
|
14
|
Altindag O, Celik H. Total antioxidant capacity and the severity of the pain in patients with fibromyalgia. Redox Rep 2006; 11:131-5. [PMID: 16805968 DOI: 10.1179/135100006x116628] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The purpose of the study was to determine the oxidative and antioxidative status of plasma in patients with fibromyalgia. Total antioxidant capacity (TAC) of plasma was significantly lower in patients with fibromyalgia (n = 20) than in healthy controls (n = 20) [1.5 (SD 0.3) and 1.9 (SD 0.3) mmol Trolox equiv./l, P = 0.001]. In contrast, the total peroxide level of plasma was significantly higher in patients than in healthy controls [37.4 (SD 6.7) and 33.0 (SD 2.7) micromol H2O2/l; P = 0.01]. The oxidative stress index (OSI) level was significantly higher in patients with fibromyalgia than in healthy controls [2.5 (SD 1.0) and 1.8 (SD 0.4); P = 0.007]. A significant negative correlation between visual analogue scale (VAS) and TAC level was determined (r = -0.79, P < 0.001). The present results indicate that patients with fibromyalgia are exposed to oxidative stress and this increased oxidative stress may play a role in the etiopathogenesis of the disease. Supplementation of antioxidant vitamins such as vitamins C and E to the therapy may be indicated.
Collapse
Affiliation(s)
- Ozlem Altindag
- Department of Physical Medicine and Rehabilitation, Harran University, Sanliurfa, Turkey.
| | | |
Collapse
|
15
|
Abstract
Erectile dysfunction (ED) is highly prevalent in diabetes mellitus. Pathophysiological mechanisms underlying diabetes-associated ED are in large part due to endothelial dysfunction, which functionally refers to the inability of the endothelium to produce vasorelaxing messengers and to maintain vasodilation and vascular homeostasis. The precise mechanisms leading to endothelial dysfunction in the diabetic vasculature, including the penis, are not yet fully understood. Hyperglycemia affects endothelial nitric oxide synthase activity and nitric oxide production/bioavailability, nitric oxide-independent relaxing factors, oxidative stress, production and/or action of hormones, growth factors and/or cytokines, and generation and activity of opposing vasoconstrictors. Considering recent advances in the field of vascular biology and diabetes, the emphasis in this review is placed on the mechanisms of hyperglycemia-induced endothelial dysfunction in the pathophysiology of diabetes-associated ED.
Collapse
Affiliation(s)
- B Musicki
- Department of Urology, Johns Hopkins University, SOM, Baltimore, MD 21287, USA.
| | | |
Collapse
|
16
|
Demirbag R, Yilmaz R, Kunt AS, Gur M, Ulucay A, Unlu D. Relationship Between Plasma Total Antioxidant Capacity and Thoracic Aortic Intima-Media Thickness. Echocardiography 2006; 23:183-8. [PMID: 16524387 DOI: 10.1111/j.1540-8175.2006.00194.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
It is known that antioxidants have an important role in the prevention of coronary artery disease (CAD). Low total antioxidant capacity (TAC) is a risk factor for ischemic heart disease. However, no data are available concerning the relationship between TAC and severity of thoracic aortic atherosclerosis. This study using multiplane transesophageal echocardiography (TEE) examined the relationship between atherosclerotic thoracic aortic intima-media thickness (TAIMT) and TAC. Twenty-nine patients (17 male, 12 female; mean age 36 +/- 8 years) without a history of atherosclerotic cardiovascular disease referred for TEE were included. The patients with obesity, hypertension, diabetes, and CAD were excluded. The TAC was measured for each patient using a more recently developed method. TAIMT and grade of thoracic aortic atherosclerosis were evaluated in each patient by using TEE. Mean TAC level was 1.91 +/- 0.53 mmol Trolox equiv/l. There was a negative and significant correlation between the TAC levels and TAIMT and grade of thoracic aortic atherosclerosis (r = -0.799, P < 0.001 versus r = -0.827, P < 0.001, respectively). Multiple linear regression analysis showed that TAIMT was independently associated with TAC (beta = -0.734, P < 0.001). The mean values of TAC in grade I, II, and III were 2.23 +/- 0.31, 1.58 +/- 0.31, and 1.04 +/- 0.27 mmol Trolox equiv/l, respectively (ANOVA P < 0.001). This study indicates that the TAC is an independent variable for TAIMT and it has a potential for an independent variable for atherosclerotic lesions in the major arterial locations.
Collapse
Affiliation(s)
- Recep Demirbag
- Department of Cardiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey.
| | | | | | | | | | | |
Collapse
|
17
|
Aycicek A, Erel O, Kocyigit A. Decreased total antioxidant capacity and increased oxidative stress in passive smoker infants and their mothers. Pediatr Int 2005; 47:635-9. [PMID: 16354215 DOI: 10.1111/j.1442-200x.2005.02137.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Smoking has many adverse health effects in infants and adults. The purpose of the study was to study the effect of passive cigarette smoking on oxidative and antioxidative status of plasma in passive smoker infants and their mothers and to compare with those of non-smokers. METHODS Subjects were randomly chosen from infants aged 8-26 weeks and their mothers aged 20-34 years. Passive smoker infants (n = 29) and their mothers (n = 29) were defined as having other family members who smoked six or more cigarettes per day continually for at least 8 weeks. Non-smokers were defined as infants (n = 30) and their mothers (n = 24) who had never been exposed to passive smoking. The antioxidative status of plasma were perused by measuring the total antioxidant capacity. Oxidative status was evaluated by predicating total peroxide level, oxidative stress index, protein oxidation and lipid peroxidation. RESULTS Plasma concentrations of total antioxidant capacity were significantly lower in passive smoker infants and their mothers than non-passive smoker infants and their mothers. However, lipid peroxidation and oxidative stress index were remarkably higher in passive smoker infants and their mothers than those of non-passive smoker infants and their mothers. There were significant correlations between the oxidative and antioxidative parameters of the passive smoker infants and their mothers. CONCLUSIONS Oxidants are increased and antioxidants are decreased in passive smoker infants and their mothers than those of non-smokers. Passive smoker infants and their mothers are exposed to potent oxidative stress.
Collapse
Affiliation(s)
- Ali Aycicek
- Department of Pediatrics, Children's Hospital at Sanliurfa, Sanliurfa, Turkey.
| | | | | |
Collapse
|
18
|
Aycicek A, Erel O, Kocyigit A. Increased oxidative stress in infants exposed to passive smoking. Eur J Pediatr 2005; 164:775-8. [PMID: 16025297 DOI: 10.1007/s00431-005-1720-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2005] [Accepted: 05/04/2005] [Indexed: 10/25/2022]
Abstract
The purpose of this study was to assess the effect of passive cigarette smoking on the oxidative and anti-oxidative status of plasma in infants. Eighty-four infants aged 6-28 weeks were divided into two groups: the study group included infants who had been exposed to passive smoking via at least five cigarettes per day for at least the past 6 weeks at home, while the control group included infants who had never been exposed to passive smoking. The antioxidative status of plasma was assessed by the measurement of individual antioxidant components: vitamin C, albumin, bilirubin, uric acid, thiol contents and total antioxidant capacity (TAC 1 and TAC 2). Oxidative status was assessed by the determination of total peroxide levels and the oxidative stress index (OSI 1 and OSI 2). Plasma vitamin C, thiol concentration and TAC 1 and TAC 2 levels were significantly lower, whereas plasma total peroxide levels and OSI 1 and OSI 2 were significantly higher, in passive smoking infants than in the controls (P<0.01). We conclude that passive smoking has a negative impact on numerous parts of the antioxidant defence system in infants, and exposes them to potent oxidative stress.
Collapse
Affiliation(s)
- Ali Aycicek
- Paediatrics Department, Children's Hospital of Sanliurfa, Turkey.
| | | | | |
Collapse
|
19
|
Erel O. A new automated colorimetric method for measuring total oxidant status. Clin Biochem 2005; 38:1103-11. [PMID: 16214125 DOI: 10.1016/j.clinbiochem.2005.08.008] [Citation(s) in RCA: 1952] [Impact Index Per Article: 102.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Revised: 06/29/2005] [Accepted: 08/04/2005] [Indexed: 01/14/2023]
Abstract
OBJECTIVES To develop a new, colorimetric and automated method for measuring total oxidation status (TOS). DESIGN AND METHODS The assay is based on the oxidation of ferrous ion to ferric ion in the presence of various oxidant species in acidic medium and the measurement of the ferric ion by xylenol orange. The oxidation reaction of the assay was enhanced and precipitation of proteins was prevented. In addition, autoxidation of ferrous ion present in the reagent was prevented during storage. The method was applied to an automated analyzer, which was calibrated with hydrogen peroxide and the analytical performance characteristics of the assay were determined. RESULTS There were important correlations with hydrogen peroxide, tert-butyl hydroperoxide and cumene hydroperoxide solutions (r=0.99, P<0.001 for all). In addition, the new assay presented a typical sigmoidal reaction pattern in copper-induced lipoprotein autoxidation. The novel assay is linear up to 200 micromol H2O2 Equiv./L and its precision value is lower than 3%. The lower detection limit is 1.13 micromol H2O2 Equiv./L. The reagents are stable for at least 6 months on the automated analyzer. Serum TOS level was significantly higher in patients with osteoarthritis (21.23+/-3.11 micromol H2O2 Equiv./L) than in healthy subjects (14.19+/-3.16 micromol H2O2 Equiv./L, P<0.001) and the results showed a significant negative correlation with total antioxidant capacity (TAC) (r=-0.66 P<0.01). CONCLUSIONS This easy, stable, reliable, sensitive, inexpensive and fully automated method that is described can be used to measure total oxidant status.
Collapse
Affiliation(s)
- Ozcan Erel
- Department of Clinical Biochemistry, Faculty of Medicine, Research Hospital, Harran University, Sanliurfa TR-63100, Turkey.
| |
Collapse
|