1
|
Huang Y, Wang Y, Su H, Wang H, Xu H, Xu C, Zhou F, Zhang Y. Association between polyunsaturated fatty acid intake and the prevalence of erectile dysfunction: A cross-sectional analysis of the NHANES 2001-2004. Lipids Health Dis 2023; 22:182. [PMID: 37880723 PMCID: PMC10601238 DOI: 10.1186/s12944-023-01950-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/18/2023] [Indexed: 10/27/2023] Open
Abstract
BACKGROUND Polyunsaturated fatty acids (PUFAs) have demonstrated significant therapeutic potential across a wide range of disease. The aim of this study was to investigate the potential impact of PUFA intake on the prevalence of erectile dysfunction (ED). METHODS The study included a total of 3730 participants from the National Health and Nutrition Examination Survey (NHANES) 2001-2004. Univariate analysis, multivariate regression analysis, subgroup analysis and machine learning were utilized to explore the relationship of variables to ED. Dose response curves were constructed to observe the linear or nonlinear relationship between PUFA intake and the prevalence of ED. Propensity score matching (PSM) was used for sensitivity analysis. Finally, the potential mechanistic link between PUFA intake and ED was explored. RESULTS Through univariate and multivariate regression analysis results before and after PSM and XGBoost algorithm model results, arachidonic acid (AA) was chosen as the main research object. The consumption of AA was found to be associated with a decreased prevalence of ED under the fully adjusted model [OR = 0.33 (0.20, 0.56), P < 0.001]. The interaction between AA and education was found in the subgroup analysis. Dose-response curves indicated a linear negative correlation between AA intake and the prevalence of ED. The above results were confirmed in the data analysis after 1:1 PSM. In addition, AA intake was associated with a decrease in inflammatory biomarkers and homocysteine. CONCLUSIONS The results suggest that AA intake is negatively correlated with the prevalence of ED. Further, anti-inflammatory and anti-endothelial damage may play a role in this.
Collapse
Affiliation(s)
- Yong Huang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yingying Wang
- Department of Oncology, People Hospital of Jiulongpo District, Chongqing, 400050, China
| | - Huiyi Su
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Hexi Wang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Haoyu Xu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Chengwei Xu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Fulin Zhou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yao Zhang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
| |
Collapse
|
2
|
Isli F, Yildirim S, Ozturk Fincan GS, Ercan S, Sarioglu Y. Effects of epoxygenases on the nonadrenergic noncholinergic relaxant responses induced by electrical field stimulation in rabbit corpus cavernosum. Andrologia 2019; 51:e13317. [PMID: 31107569 DOI: 10.1111/and.13317] [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: 01/31/2019] [Revised: 04/15/2019] [Accepted: 04/28/2019] [Indexed: 11/29/2022] Open
Abstract
We aimed to investigate the effects of epoxygenases on electrical field stimulation (EFS)-mediated nitric oxide (NO)-dependent and NO-independent nonadrenergic noncholinergic (NANC) relaxations in isolated rabbit corpus cavernosum. The tissues of 20 male adult albino rabbits (2.5-3 kg) were suspended in organ baths containing aerated Krebs solution, and isometric contractions were recorded. EFS-mediated NANC relaxations were obtained on phenylephrin (3 × 10-5 M)-contracted tissues in the presence of guanethidine (10-6 M) and atropine (10-6 M). Miconazole (10-9 -10-4 M), 17-octadecynoic acid (ODYA) (10-10 -10-5 M), 14,15-epoxyeicosatrienoic acid (EET) (10-11 -10-8 M), 11,12-EET (10-12 -3 × 10-8 M) and 20-hydroxyeicosatetraenoic acid (HETE) (10-11 -3 × 10-8 M) were added cumulatively (n = 5-7 for each set of experiments). For NO-independent relaxations, Nω -nitro-l-arginine methyl ester (l-NAME) (10-4 M) was added before a group of experiments. Depending on the concentration, miconazole, 17-ODYA, 14,15-EET, 11,12-EET, and 20-HETE significantly enhanced both NO-dependent and NO-independent EFS-mediated relaxations (p < 0.05). Epoxygenases showed similar effect on NO-dependent and NO-independent relaxant responses except 20-HETE which caused significantly more enhanced relaxation on NO-dependent responses (p < 0.05). No drug caused a significant relaxation response on tissues contracted with phenylephrine. Epoxygenases contribute to EFS-mediated NO-dependent and NO-independent NANC relaxations by presynaptic mechanisms, offering a new treatment alternative for erectile dysfunction which needs to be explored in further in vivo, molecular and clinical studies.
Collapse
Affiliation(s)
- Fatma Isli
- Department of Rational Drug Use, Turkish Medicines and Medical Devices Agency, Ministry of Health, Ankara, Turkey
| | - Seniz Yildirim
- Ankara Numune Health Application and Research Centre, University of Health Sciences, Ankara, Turkey
| | | | - Sevim Ercan
- Member of Turkish Academy of Science, Ankara, Turkey
| | - Yusuf Sarioglu
- Department of Medical Pharmacology, Istinye University School of Medicine, Istanbul, Turkey
| |
Collapse
|
3
|
Minaz N, Razdan R, Hammock BD, Mujwar S, Goswami SK. Impact of diabetes on male sexual function in streptozotocin-induced diabetic rats: Protective role of soluble epoxide hydrolase inhibitor. Biomed Pharmacother 2019; 115:108897. [PMID: 31102913 PMCID: PMC6893866 DOI: 10.1016/j.biopha.2019.108897] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 04/07/2019] [Accepted: 04/17/2019] [Indexed: 12/31/2022] Open
Abstract
Diabetes-induced male sexual dysfunction is associated with endothelial dysfunction. Inhibition of soluble epoxide hydrolase (sEH) is known to improve endothelial function in diabetes. Therefore, we hypothesized that sEH inhibitor (sEHI), [trans-4-{4-[3-(4-trifluoromethoxyphenyl)-ureido]cyclohexyloxy}benzoic acid] / t-TUCB can restore the male sexual function in diabetic rat. After one week of administration of diabetogenic agent STZ (52 mg/kg i.p) injection, diabetic rats were treated with t-TUCB (0.1 and 0.3 mg/kg, p.o) or vehicle for 8 weeks. The sexual behaviour parameters of the animals were evaluated at the end of dosing period. The levels of testosterone and glucose in serum, and sperm were quantified. Effect of treatment on weight of reproductive organs and histopathology of penile tissue was evaluated. Diabetes had a negative effect on male sexual function, weight of sexual organs and production of sperm with a parallel decrease in the level of testosterone. The sEHI, t-TUCB, significantly preserved the sexual function and minimized an increase in the level of blood glucose in diabetic rats. It also prevented a decrease in the level of testosterone and sperm in diabetic rats, in comparison to diabetic control rats. Further, diabetes induced distortion of corpus cavernosum was attenuated by t-TUCB. Based on our findings, sEHI may delay the development of sexual dysfunction in diabetes.
Collapse
Affiliation(s)
- Nathani Minaz
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Rema Razdan
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Bruce D Hammock
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Somdutt Mujwar
- Institute of Pharmaceutical Research, GLA University, 17km Stone, NH-2, Mathura-Delhi Road P.O. Chaumuhan, Mathura, 281 406, Uttar Pradesh, India
| | - Sumanta Kumar Goswami
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India; Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA.
| |
Collapse
|
4
|
Aydinoglu F, Ogulener N. The role of arachidonic acid/cyclooxygenase cascade, phosphodiesterase IV and Rho-kinase in H 2 S-induced relaxation in the mouse corpus cavernosum. Pharmacol Rep 2017; 69:610-615. [DOI: 10.1016/j.pharep.2017.02.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 01/10/2017] [Accepted: 02/22/2017] [Indexed: 12/19/2022]
|
5
|
Goswami SK, Inamdar MN, Dethe SM, Gururaj GM, Jamwal R, Bhaskar A, Mundkinajeddu D, Agarwal A. Erectogenic and Aphrodisiac Property of Moringa oleifera: Involvement of Soluble Epoxide Hydrolase Enzyme. Phytother Res 2016; 30:1119-27. [PMID: 27020843 DOI: 10.1002/ptr.5614] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 01/12/2016] [Accepted: 02/28/2016] [Indexed: 12/20/2022]
Abstract
Soluble epoxide hydrolase (sEH) inhibitors have been reported to improve penile erection; therefore, sEH could be useful for management of erectile dysfunction. Methanolic and aqueous extracts of 30 Indian medicinal plants were screened for their sEH inhibition potential. Fifteen extracts showed >50% inhibition when screened at 50 µg/mL in sEH inhibition assay. Methanolic extract of Moringa oleifera Lam. (Moringaceae) seeds (MEMO) was most potent with IC50 1.7 ± 0.1 µg/mL and was selected for in vitro studies on isolated rat corpus cavernosum smooth muscle and in vivo sexual behaviour studies on healthy and diabetic rats. Rats were divided into five groups, each containing six animals and treated orally with either water, vehicle (1% Tween-20), MEMO (45 and 90 mg/kg/day for 21 days), and standard drug, sildenafil (5 mg/kg/day for 7 days). An equal number of female rats were used, and the effect of MEMO and sildenafil was compared with that of vehicle. MEMO significantly relaxed isolated rat corpus cavernosum smooth muscle at 0.1-100 µg/mL in vitro and significantly increased (p < 0.05) sexual activity, intracavernous pressure/mean arterial pressure in normal and diabetic rats. The increase in erectile function of rats by MEMO could be because of its sEH inhibitory activity. Copyright © 2016 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
| | | | - Shekhar M Dethe
- R&D Centre, Natural Remedies Pvt. Ltd., Plot No. 5B, Veerasandra Industrial Area, Bangalore, 560100, India
| | - Giligar M Gururaj
- R&D Centre, Natural Remedies Pvt. Ltd., Plot No. 5B, Veerasandra Industrial Area, Bangalore, 560100, India
| | - Rohitash Jamwal
- R&D Centre, Natural Remedies Pvt. Ltd., Plot No. 5B, Veerasandra Industrial Area, Bangalore, 560100, India
| | - Anirban Bhaskar
- R&D Centre, Natural Remedies Pvt. Ltd., Plot No. 5B, Veerasandra Industrial Area, Bangalore, 560100, India
| | - Deepak Mundkinajeddu
- R&D Centre, Natural Remedies Pvt. Ltd., Plot No. 5B, Veerasandra Industrial Area, Bangalore, 560100, India
| | - Amit Agarwal
- R&D Centre, Natural Remedies Pvt. Ltd., Plot No. 5B, Veerasandra Industrial Area, Bangalore, 560100, India
| |
Collapse
|
6
|
Shi L, He L, Sarvepalli P, McCluskey LP. Functional role for interleukin-1 in the injured peripheral taste system. J Neurosci Res 2012; 90:816-30. [PMID: 22213141 PMCID: PMC3274645 DOI: 10.1002/jnr.22798] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 08/24/2011] [Accepted: 08/24/2011] [Indexed: 12/16/2022]
Abstract
The peripheral taste system presents an excellent model for studying the consequences of neural injury, for the damaged nerve and sensory cells and the neighboring, intact neural cells. Sectioning a primary afferent nerve, the chorda tympani (CT), rapidly recruits neutrophils to both sides of the tongue. The bilateral neutrophil response induces transient functional deficits in the intact CT. Normal function is subsequently restored as macrophages respond to injury. We hypothesized that macrophages produce the proinflammatory cytokine interleukin (IL)-1, which contributes to the maintenance of normal taste function after nearby injury. We demonstrate that IL-1β protein levels are significantly increased on the injured side of the tongue at day 2 after injury. Dietary sodium deficiency, a manipulation that prevents macrophage recruitment, inhibits the elevation in IL-1β. IL-1β was expressed in several cell populations, including taste receptor cells and infiltrating neutrophils and macrophages. To test whether IL-1 modulates taste function after injury, we blocked signaling with an IL-1 receptor antagonist (IL-1 RA) and recorded taste responses from the intact CT. This treatment inhibited the bilateral macrophage response to injury and impaired taste responses in the intact CT. Cytokine actions in the taste system are largely unstudied. These results demonstrate that IL-1 has a beneficial effect on taste function after nearby injury, in contrast to its detrimental role in the injured central nervous system.
Collapse
Affiliation(s)
- Liqiao Shi
- Institute of Molecular Medicine & Genetics, Medical College of Georgia, Augusta, GA 30912-3000
- State Key Laboratory of Virology, Department of Medical Virology, School of Medicine, Wuhan University, Wuhan, China 430071
| | - Lianying He
- Institute of Molecular Medicine & Genetics, Medical College of Georgia, Augusta, GA 30912-3000
| | - Padma Sarvepalli
- Institute of Molecular Medicine & Genetics, Medical College of Georgia, Augusta, GA 30912-3000
| | | |
Collapse
|
7
|
Inhibition of Soluble Epoxide Hydrolase Confers Cardioprotection and Prevents Cardiac Cytochrome P450 Induction by Benzo(a)pyrene. J Cardiovasc Pharmacol 2011; 57:273-81. [DOI: 10.1097/fjc.0b013e3182055baf] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
8
|
Carter JG, Cherry J, Williams K, Turner S, Bates DO, Churchill AJ. Splicing Factor Polymorphisms, the Control of VEGF Isoforms and Association with Angiogenic Eye Disease. Curr Eye Res 2011; 36:328-35. [DOI: 10.3109/02713683.2010.548892] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
9
|
Effects of Impaza on Sexual Behavior in Different Experimental Models. Bull Exp Biol Med 2011; 150:500-3. [DOI: 10.1007/s10517-011-1178-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Aboutabl ME, Zordoky BNM, El-Kadi AOS. 3-methylcholanthrene and benzo(a)pyrene modulate cardiac cytochrome P450 gene expression and arachidonic acid metabolism in male Sprague Dawley rats. Br J Pharmacol 2010; 158:1808-19. [PMID: 19889059 DOI: 10.1111/j.1476-5381.2009.00461.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND AND PURPOSE There is a strong correlation between cytochrome P450 (P450)-dependent arachidonic acid metabolism and the pathogenesis of cardiac hypertrophy. Several aryl hydrocarbon receptor (AhR) ligands were found to alter P450-dependent arachidonic acid metabolism. Here, we have investigated the effect of 3-methylcholanthrene (3-MC) and benzo(a)pyrene (BaP), two AhR ligands, on the development of cardiac hypertrophy. EXPERIMENTAL APPROACH Male Sprague Dawley rats were injected (i.p.) daily with either 3-MC (10 mg kg(-1)) or BaP (20 mg kg(-1)) for 7 days. Then hearts were removed, and the heart to body weight ratio and the gene expression of the hypertrophic markers and P450 genes were determined. Levels of arachidonic acid metabolites were determined by liquid chromatography-electron spray ionization-mass spectrometry. KEY RESULTS Both 3-MC and BaP increased the heart to body weight ratio as well as the hypertrophic markers, atrial natriuretic peptide and brain natriuretic peptide. 3-MC and BaP treatment increased the gene expression of CYP1A1, CYP1B1, CYP2E1, CYP4F4, CYP4F5 and soluble epoxide hydrolase. Both 3-MC and BaP treatments increased the dihydroxyeicosatrienoic acids (DHETs) : epoxyeicosatrienoic acids (EETs) ratio and the 20-hydroxyeicosatetraenoic acid (20-HETE) : total EETs ratio. Treatment with benzo(e)pyrene, an isomer of BaP that is a poor ligand for the AhR, did not induce cardiac hypertrophy in rats, confirming the role of AhR in the development of cardiac hypertrophy. Treatment with the omega-hydroxylase inhibitor, HET0016, significantly reversed BaP-induced cardiac hypertrophy. CONCLUSIONS AND IMPLICATIONS 3-MC and BaP induce cardiac hypertrophy by increasing the ratio of DHETs : EETs and/or the ratio of 20-HETE : total EETs, through increasing soluble epoxide hydrolase activity.
Collapse
Affiliation(s)
- Mona E Aboutabl
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | | | | |
Collapse
|
11
|
Sudhahar V, Shaw S, Imig JD. Epoxyeicosatrienoic acid analogs and vascular function. Curr Med Chem 2010; 17:1181-90. [PMID: 20158473 DOI: 10.2174/092986710790827843] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 02/06/2010] [Indexed: 01/14/2023]
Abstract
Arachidonic acid metabolites, eicosanoids, are key contributors to vascular function and improper eicosanoid regulation contributes to the progression of cardiovascular diseases. Epoxyeicosatrienoic acids (EETs) are synthesized from arachidonic acid by epoxygenase enzymes to four regioisomers, 5,6-EET, 8,9-EET, 11,12-EET, and 14,15-EET. These EETs have interesting beneficial effects like vasodilation, anti-inflammation, and anti-platelet aggregation that could combat cardiovascular diseases. There is mounting evidence that each regioisomeric EET may have unique vascular effects and that the contribution of individual EETs to vascular function differs from organ to organ. Over the past decade EET analogs and antagonists have been synthesized to determine EET structure function relationships and define the contribution of each regioisomeric EET. A number of studies have demonstrated that EET analogs induce vasodilation, lower blood pressure and decrease inflammation. EET antagonists have also been used to demonstrate that endogenous EETs contribute importantly to cardiovascular function. This review will discuss EET synthesis, regulation and physiological roles in the cardiovascular system. Next we will focus on the development of EET analogs and what has been learned about their contribution to vascular function. Finally, the development of EET antagonists and how these have been utilized to determine the cardiovascular actions of endogenous epoxides will be discussed. Overall, this review will highlight the important knowledge garnered by the development of EET analogs and their possible value in the treatment of cardiovascular diseases.
Collapse
Affiliation(s)
- V Sudhahar
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, 53226, USA
| | | | | |
Collapse
|
12
|
Inhibition of soluble epoxide hydrolase enhances the anti-inflammatory effects of aspirin and 5-lipoxygenase activation protein inhibitor in a murine model. Biochem Pharmacol 2009; 79:880-7. [PMID: 19896470 DOI: 10.1016/j.bcp.2009.10.025] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Revised: 10/24/2009] [Accepted: 10/26/2009] [Indexed: 11/21/2022]
Abstract
Inflammation is a multi-staged process whose expansive phase is thought to be driven by acutely released arachidonic acid (AA) and its metabolites. Inhibition of cyclooxygenase (COX), lipoxygenase (LOX), or soluble epoxide hydrolase (sEH) is known to be anti-inflammatory. Inhibition of sEH stabilizes the cytochrome P450 (CYP450) products epoxyeicosatrienoic acids (EETs). Here we used a non-selective COX inhibitor aspirin, a 5-lipoxygenase activation protein (FLAP) inhibitor MK886, and a sEH inhibitor t-AUCB to selectively modulate the branches of AA metabolism in a lipopolysaccharide (LPS)-challenged murine model. We used metabolomic profiling to simultaneously monitor representative AA metabolites of each branch. In addition to the significant crosstalk among branches of the AA cascade during selective modulation of COX, LOX, or sEH, we demonstrated that co-administration of t-AUCB enhanced the anti-inflammatory effects of aspirin or MK886, which was evidenced by the observations that co-administration resulted in favorable eicosanoid profiles and better control of LPS-mediated hypotension as well as hepatic protein expression of COX-2 and 5-LOX. Targeted disruption of the sEH gene displayed a parallel profile to that produced by t-AUCB. These observations demonstrate a significant level of crosstalk among the three major branches of the AA cascade and that they are not simply parallel pathways. These data illustrate that inhibition of sEH by both pharmacological intervention and gene knockout enhances the anti-inflammatory effects of aspirin and MK886, suggesting the possibility of modulating multiple branches to achieve better therapeutic effects.
Collapse
|
13
|
Abdel Aziz MT, El Asmer MF, Mostafa T, Atta H, Mahfouz S, Fouad H, Rashed L, Sabry D, Hassouna A, Abdel Aziz AT, Senbel A, Demery A. Effects of losartan, HO-1 inducers or HO-1 inhibitors on erectile signaling in diabetic rats. J Sex Med 2009; 6:3254-64. [PMID: 19804535 DOI: 10.1111/j.1743-6109.2009.01517.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Activation of the renin-angiotensin system which is common in diabetes mellitus might affect heme oxygenase (HO-1) gene expression. AIM Assessment of the effects of administration of angiotensin II (Ang II) receptor antagonist (losartan) with HO-1 inducer or inhibitor on erectile signaling in diabetic rats. MATERIALS AND METHODS Seventy male rats were divided equally into seven groups; healthy controls, streptozotocin-induced diabetic rats, rats on citrate buffer, diabetic rats on losartan, diabetic rats on HO-1 inducer (cobalt protoporphyrin [CoPP]), diabetic rats on losartan and CoPP, and diabetic rats on losartan and HO-1 inhibitor (stannus mesoporphyrin [SnMP]). MAIN OUTCOME MEASURE HO enzyme activity, HO-1 gene expression, cyclic guanosine monophosphate (cGMP) assay, intracavernosal pressure (ICP), and cavernous tissue sinusoids surface area. RESULTS HO-1 gene expression, HO enzymatic activity, and cGMP were significantly decreased in the cavernous tissue of diabetic rats. These parameters were significantly elevated with the use of CoPP that restored the normal control levels of HO enzyme activity. Administration of losartan exhibited a significant enhancing effect on these parameters compared with the diabetic group, but not restored to the control levels, whereas administration of CoPP combined with losartan led to the restoration of their normal levels. ICP demonstrated significant decline in diabetic rats. The use of CoPP and/or losartan led to its significant improvement compared with diabetic rats. Administration of either losartan and/or CoPP led to a significant increase in the cavernous sinusoids surface area of diabetic rats. Administration of losartan with SnMP significantly decreased the enhancing effect of losartan on the studied parameters. CONCLUSION The decline in erectile function in diabetes mellitus could be attributed to the downregulation of HO-1 gene expression. HO-1 induction added to Ang II receptor antagonist could improve erectile function.
Collapse
Affiliation(s)
- Mohamed Talaat Abdel Aziz
- Faculty of Medicine, Cairo University, Medical Biochemistry, Unit of Biochemistry & Molecular Biology, Cairo, Egypt
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Liu JY, Tsai HJ, Hwang SH, Jones PD, Morisseau C, Hammock BD. Pharmacokinetic optimization of four soluble epoxide hydrolase inhibitors for use in a murine model of inflammation. Br J Pharmacol 2009; 156:284-96. [PMID: 19154430 DOI: 10.1111/j.1476-5381.2008.00009.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Early soluble epoxide hydrolase inhibitors (sEHIs) such as 12-(3-adamantan-1-yl-ureido)-dodecanoic acid (AUDA) are effective anti-hypertensive and anti-inflammatory agents in various animal models. However, their poor metabolic stability and limited water solubility make them difficult to use pharmacologically. Here we present the evaluation of four sEHIs for improved pharmacokinetic properties and the anti-inflammatory effects of one sEHI. EXPERIMENTAL APPROACH The pharmacokinetic profiles of inhibitors were determined following p.o. (oral) administration and serial bleeding in mice. Subsequently the pharmacokinetics of trans-4-[4-(3-adamantan-1-yl-ureido)-cyclohexyloxy]-benzoic acid (t-AUCB), the most promising inhibitor, was further studied following s.c. (subcutaneous), i.v. (intravenous) injections and administration in drinking water. Finally, the anti-inflammatory effect of t-AUCB was evaluated by using a lipopolysaccharide (LPS)-treated murine model. KEY RESULTS Better pharmacokinetic parameters (higher C(max), longer t(1/2) and greater AUC) were obtained from the tested inhibitors, compared with AUDA. Oral bioavailability of t-AUCB (0.1 mg.kg(-1)) was 68 +/- 22% (n = 4), and giving t-AUCB in drinking water is recommended as a feasible, effective and easy route of administration for chronic studies. Finally, t-AUCB (p.o.) reversed the decrease in plasma ratio of lipid epoxides to corresponding diols (a biomarker of soluble epoxide hydrolase inhibition) in lipopolysaccharide-treated mice. The in vivo potency of 1 mg.kg(-1) of t-AUCB (p.o.) was better in this inflammatory model than that of 10 mg.kg(-1) of AUDA-butyl ester (p.o) at 6 h after treatment. CONCLUSIONS AND IMPLICATIONS t-AUCB is a potent sEHI with improved pharmacokinetic properties. This compound will be a useful tool for pharmacological research and a promising starting point for drug development.
Collapse
Affiliation(s)
- Jun-Yan Liu
- Department of Entomology and UCD Cancer Research Center, University of California-Davis, One Shields Avenue, Davis, CA 95616, USA
| | | | | | | | | | | |
Collapse
|
15
|
EnayetAllah AE, Luria A, Luo B, Tsai HJ, Sura P, Hammock BD, Grant DF. Opposite regulation of cholesterol levels by the phosphatase and hydrolase domains of soluble epoxide hydrolase. J Biol Chem 2008; 283:36592-8. [PMID: 18974052 DOI: 10.1074/jbc.m806315200] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Soluble epoxide hydrolase (sEH) is a bifunctional enzyme with two catalytic domains: a C-terminal epoxide hydrolase domain and an N-terminal phosphatase domain. Epidemiology and animal studies have attributed a variety of cardiovascular and anti-inflammatory effects to the C-terminal epoxide hydrolase domain. The recent association of sEH with cholesterol-related disorders, peroxisome proliferator-activated receptor activity, and the isoprenoid/cholesterol biosynthesis pathway additionally suggest a role of sEH in regulating cholesterol metabolism. Here we used sEH knock-out (sEH-KO) mice and transfected HepG2 cells to evaluate the phosphatase and hydrolase domains in regulating cholesterol levels. In sEH-KO male mice we found a approximately 25% decrease in plasma total cholesterol as compared with wild type (sEH-WT) male mice. Consistent with plasma cholesterol levels, liver expression of HMG-CoA reductase was found to be approximately 2-fold lower in sEH-KO male mice. Additionally, HepG2 cells stably expressing human sEH with phosphatase only or hydrolase only activity demonstrate independent and opposite roles of the two sEH domains. Whereas the phosphatase domain elevated cholesterol levels, the hydrolase domain lowered cholesterol levels. Hydrolase inhibitor treatment in sEH-WT male and female mice as well as HepG2 cells expressing human sEH resulted in higher cholesterol levels, thus mimicking the effect of expressing the phosphatase domain in HepG2 cells. In conclusion, we show that sEH regulates cholesterol levels in vivo and in vitro, and we propose the phosphatase domain as a potential therapeutic target in hypercholesterolemia-related disorders.
Collapse
Affiliation(s)
- Ahmed E EnayetAllah
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut 06269-3092, USA
| | | | | | | | | | | | | |
Collapse
|
16
|
Chu X, Zhavbert ES, Dugina JL, Kheyfets IA, Sergeeva SA, Epstein OI, Ågmo A. Sildenafil and a Compound Stimulating Endothelial NO Synthase Modify Sexual Incentive Motivation and Copulatory Behavior in Male Wistar and Fisher 344 Rats. J Sex Med 2008; 5:2085-99. [DOI: 10.1111/j.1743-6109.2008.00937.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
Chiamvimonvat N, Ho CM, Tsai HJ, Hammock BD. The soluble epoxide hydrolase as a pharmaceutical target for hypertension. J Cardiovasc Pharmacol 2007; 50:225-37. [PMID: 17878749 DOI: 10.1097/fjc.0b013e3181506445] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The soluble epoxide hydrolase appears to be a promising target for the development of antihypertensive therapies based on a previously unexplored mechanism of action. Epoxide hydrolases are enzymes that add water to three membered cyclic ethers known as epoxides. The soluble epoxide hydrolase in mammalian systems (sEH) is a member of the alpha/beta-hydrolase fold family of enzymes and it shows a high degree of selectivity for epoxides of fatty acids. The regioisomeric epoxides of arachidonic acid or epoxyeicosanoids (EETs) are particularly good substrates. These EETs appear to be major components of the endothelium-derived hyperpolarizing factors (EDHFs). As such, EETs cause vasodilation and reduce blood pressure. The EETs also are strongly anti-inflammatory and analgesic. By inhibiting sEH, the increase in circulating EETs leads to a reduction in blood pressure in a number of animal models. Potent transition state mimic inhibitors have been developed for the sEH. Some of these sEH inhibitors (sEHIs) show nanomolar to picomolar potency and good pharmacokinetic properties. Because of their unique mode of action they show promise in treating hypertension while reducing problems with end organ failure, vascular inflammation and diabetes. Indeed, the anti-inflammatory properties of the sEHI may make them particularly suitable for treating hypertension in patients with other concomitant metabolic syndromes. They are more potent on a molar basis than most nonsteroidal anti-inflammatory drugs (NSAIDs) in reducing PGE2 in inflammation models, they strongly synergize with NSAIDs, and appear to ameliorate apparently unfavorable eicosanoid profiles associated with some cyclo-oxygenase-2 inhibitors.
Collapse
Affiliation(s)
- Nipavan Chiamvimonvat
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA 95616, USA
| | | | | | | |
Collapse
|
18
|
Yousif MHM, Benter IF. Role of cytochrome P450 metabolites of arachidonic acid in regulation of corporal smooth muscle tone in diabetic and older rats. Vascul Pharmacol 2007; 47:281-7. [PMID: 17855173 DOI: 10.1016/j.vph.2007.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2007] [Revised: 08/07/2007] [Accepted: 08/07/2007] [Indexed: 11/25/2022]
Abstract
This study examined the role of cytochrome P450 (CYP) metabolites of arachidonic acid (AA) to rat corporal smooth muscle tone. 11, 12-Epoxyeicosatrienoic acid (EET) (10(-11)-10(-6 )M) produced dose-dependent relaxation of rat (control; 10 weeks old) corpus cavernosum with a pD(2) value of 8.8+/-0.2 and a maximal relaxation of 80+/-9%, whereas 20-hydroxyeicosatetraenoic (20-HETE) did not have an effect. EET-mediated relaxation of corpus cavernosum was attenuated by 71+/-3%, 55+/-2%, 53+/-5% and 84+/-3% in the presence of nitro-L-arginine methyl ester (L-NAME) (10(-4) M), an inhibitor of nitric oxide (NO) synthase, iberiotoxin (5 x 10(-8) M), an inhibitor of calcium-activated potassium (BK) channels, glibenclamide (10(-5) M), an inhibitor of ATP-sensitive K(+) channels or 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) (10(-5) M), an inhibitor of soluble guanylyl cyclase, respectively. EET-mediated relaxation of rat corpus cavernosum was significantly less in the streptozotocin (STZ)-treated (diabetic) and 30 weeks old (older) animals compared to control. Carbachol (10(-9)-10(-4) M)-induced relaxation was significantly reduced whereas phenylephrine (PE) (10(-9)-5 x 10(-3) M)-induced contraction was significantly increased in the cavernosum strips from old and diabetic rats compared to the control. Pre-incubation of the cavernosum strips obtained from control, older or diabetic rats with N-hydroxy-N'-(4-butyl-2-methyl-phenyl)-formamidine (HET0016), a selective inhibitor of 20-HETE synthesis, or 1-cyclohexyl-3-dodecyl urea (CDU), a specific inhibitor of soluble epoxide hydrolase (sEH) resulted in a significant attenuation of PE-induced contraction and improvement in carbachol-induced relaxation. We conclude that 11, 12-EET-induced relaxation of the rat corpus cavernosum involves activation of cGMP/NO pathway as well as activation of ATP-sensitive K(+) channels and BK channels. These results also suggest that inhibition of 20-HETE production or reduction of EET inactivation may have therapeutic potential to prevent erectile dysfunction associated with diabetes and aging.
Collapse
MESH Headings
- 8,11,14-Eicosatrienoic Acid/analogs & derivatives
- 8,11,14-Eicosatrienoic Acid/metabolism
- 8,11,14-Eicosatrienoic Acid/pharmacology
- Aging/metabolism
- Animals
- Arachidonic Acid/metabolism
- Arachidonic Acid/pharmacology
- Cytochrome P-450 Enzyme System/metabolism
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/physiopathology
- Dose-Response Relationship, Drug
- Hydroxyeicosatetraenoic Acids/metabolism
- Hydroxyeicosatetraenoic Acids/pharmacology
- In Vitro Techniques
- KATP Channels/physiology
- Large-Conductance Calcium-Activated Potassium Channels/physiology
- Male
- Muscle Contraction/drug effects
- Muscle Relaxation/drug effects
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/physiopathology
- Penis/drug effects
- Penis/metabolism
- Penis/physiopathology
- Rats
- Rats, Wistar
Collapse
Affiliation(s)
- Mariam H M Yousif
- Department of Pharmacology & Toxicology, Faculty of Medicine, Kuwait University, Kuwait
| | | |
Collapse
|
19
|
Huang H, Morisseau C, Wang J, Yang T, Falck JR, Hammock BD, Wang MH. Increasing or stabilizing renal epoxyeicosatrienoic acid production attenuates abnormal renal function and hypertension in obese rats. Am J Physiol Renal Physiol 2007; 293:F342-9. [PMID: 17442729 DOI: 10.1152/ajprenal.00004.2007] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Since epoxyeicosatrienoic acids (EETs) affect sodium reabsorption in renal tubules and dilate the renal vasculature, we have examined their effects on renal hemodynamics and sodium balance in male rats fed a high-fat (HF) diet by fenofibrate, a peroxisome proliferator-activated receptor-alpha (PPAR-alpha) agonist and an inducer of cytochrome P-450 (CYP) epoxygenases; by N-methanesulfonyl-6-(2-proparyloxyphenyl)hexanamide (MSPPOH), a selective EET biosynthesis inhibitor; and by 12-(3-adamantane-1-yl-ureido)dodecanoic acid (AUDA), a selective inhibitor of soluble epoxide hydrolase. In rats treated with fenofibrate (30 mg.kg(-1).day(-1) ig) or AUDA (50 mg/l in drinking water) for 2 wk, mean arterial pressure, renal vascular resistance, and glomerular filtration rate were lower but renal blood flow was higher than in vehicle-treated control rats. In addition, fenofibrate and AUDA decreased cumulative sodium balance in the HF rats. Treatment with MSPPOH (20 mg.kg(-1).day(-1) iv) + fenofibrate for 2 wk reversed renal hemodynamics and sodium balance to the levels in control HF rats. Moreover, fenofibrate caused a threefold increase in renal cortical CYP epoxygenase activity, whereas the fenofibrate-induced elevation of this activity was attenuated by MSPPOH. Western blot analysis showed that fenofibrate induced the expression of CYP epoxygenases in renal cortex and microvessels and that the induction effect of fenofibrate was blocked by MSPPOH. These results demonstrate that the fenofibrate-induced increase of CYP epoxygenase expression and the AUDA-induced stabilization of EET production in the kidneys cause renal vascular dilation and reduce sodium retention, contributing to the improvement of abnormal renal hemodynamics and hypertension in HF rats.
Collapse
MESH Headings
- 8,11,14-Eicosatrienoic Acid/analogs & derivatives
- 8,11,14-Eicosatrienoic Acid/antagonists & inhibitors
- 8,11,14-Eicosatrienoic Acid/metabolism
- Adamantane/analogs & derivatives
- Adamantane/pharmacology
- Animals
- Blood Pressure/drug effects
- Blotting, Western
- Diet
- Dietary Fats/pharmacology
- Fenofibrate/pharmacology
- Glomerular Filtration Rate/drug effects
- Hypertension, Renal/etiology
- Hypertension, Renal/metabolism
- Hypertension, Renal/physiopathology
- Hypolipidemic Agents/pharmacology
- Immunohistochemistry
- Kidney/metabolism
- Kidney/physiopathology
- Lauric Acids/pharmacology
- Male
- Obesity/complications
- Obesity/metabolism
- Obesity/physiopathology
- Rats
- Rats, Sprague-Dawley
- Renal Circulation/drug effects
- Sodium/metabolism
- Vascular Resistance/drug effects
- Water-Electrolyte Balance/drug effects
Collapse
Affiliation(s)
- Hui Huang
- Dept. of Physiology, Medical College of Georgia, Augusta, GA 30912, USA
| | | | | | | | | | | | | |
Collapse
|