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Li B, He X, Lei SS, Zhou FC, Zhang NY, Chen YH, Wang YZ, Su J, Yu JJ, Li LZ, Zheng X, Luo R, Kołodyńska D, Xiong S, Lv GY, Chen SH. Hypertensive Rats Treated Chronically With N ω-Nitro-L-Arginine Methyl Ester (L-NAME) Induced Disorder of Hepatic Fatty Acid Metabolism and Intestinal Pathophysiology. Front Pharmacol 2020; 10:1677. [PMID: 32076406 PMCID: PMC7006817 DOI: 10.3389/fphar.2019.01677] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 12/23/2019] [Indexed: 01/14/2023] Open
Abstract
Nω-nitro-L-arginine methyl ester (L-NAME), an inhibitor of nitric oxide (NO) biosynthesis, results in hypertension and liver injury. This study aimed at investigating the changes of liver lipometabonomics and exploring the underlying mechanisms of liver injury in the L-NAME-treated rats. The male Sprague-Dawley (SD) rats were treated with L-NAME (40 mg/kg, p.o.) for 8 weeks. After that, the liver, aorta, fecal, and serum were collected for analysis. The results showed that L-NAME induced hypertension and disordered the endothelial nitric oxide synthase (eNOS)-NO pathway in the treated rats. L-NAME could also increase the levels of serum total cholesterol (TC), triglyceride (TG), alanine transaminase (ALT), and aspartate transaminase (AST). The multidimensional mass spectrometry-based shotgun lipidomics (MDMS-SL) analysis showed that L-NAME could induce significant changes of the total hepatic lipids and most hepatic triglycerides, as well as fatty acid (FA). A positive correlation was found between the blood pressure and TAG. Immunofluorescence and Western-Blot experiments indicated that the L-NAME treatment significantly influenced some FA β-oxidation, desaturation, and synthesis-related proteins. The increase of intestinal inflammation, decrease of microcirculation and tight junction proteins, as well as alterations of microbial communities were observed in the L-NAME induced hypertensive rats, as well as alterations of microbial communities were notable correlation to TAG and FA species. This study demonstrated that the L-NAME-induced hypertensive rats exhibiting liver injury were the joint action of hepatic abnormal fatty acid metabolism and microcirculation disorder. Furthermore, the gut microflora, as well as the changes of FA β-oxidation (ACOX, CPT1α), desaturation (SCD-1), and synthesis (FAS) may be the potential mechanisms for abnormal fatty acid metabolism.
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Affiliation(s)
- Bo Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Xinglishang He
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Shan-Shan Lei
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Fu-Chen Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Ning-Yu Zhang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Ye-Hui Chen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Yu-Zhi Wang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Jie Su
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jing-Jing Yu
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Lin-Zi Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Xiang Zheng
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Rong Luo
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Dorota Kołodyńska
- Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Shan Xiong
- Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Gui-Yuan Lv
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Su-Hong Chen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
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Jing F, Liu M, Yang N, Liu Y, Li X, Li J. Relaxant effect of chloroquine in rat ileum: possible involvement of nitric oxide and BKCa. J Pharm Pharmacol 2013; 65:847-54. [DOI: 10.1111/jphp.12041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 01/06/2013] [Indexed: 01/04/2023]
Abstract
Abstract
Objectives
Bitter perception has a particularly important role in host defence. However, to date, direct effects of bitter compounds on small intestinal motility have not been shown. This study investigated the effects of bitter compounds on the spontaneous contraction of longitudinal smooth muscle strips of rat ileum.
Methods
Isolated longitudinal smooth muscle strips of rat ileum were used for tension recording in vitro. Immunofluorescence staining was used to identify the localization of TAS2R10 receptors.
Key findings
The spontaneous contraction of rat ileum was decreased after chloroquine administration. Other bitter compounds, such as quinine, denatonium and saccharin, exhibited similar effects. Chloroquine-induced relaxation was not blocked by tetrodotoxin, but was partially reversed by the nitric oxide synthase inhibitor L-NAME or the large conductance Ca2+-activated K+ (BKCa) channel antagonist iberiotoxin. By surgically removing the small intestinal mucosa or bathing in Ca2+-free Krebs solution, the chloroquine-induced relaxation was largely attenuated. The immunofluorescence staining showed that TAS2R10 receptors were expressed in rat ileum.
Conclusions
The results indicate that bitter receptor agonists induce relaxation of longitudinal smooth muscle strips of rat ileum, which is mediated by nitric oxide and BKCa channels.
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Affiliation(s)
- Fangmiao Jing
- Department of Physiology, Shandong University School of Medicine, Jinan, China
| | - Ming Liu
- Department of Obstetrics and Gynecology, Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Ning Yang
- Department of Physiology, Shandong University School of Medicine, Jinan, China
| | - Yinglu Liu
- Department of Physiology, Shandong University School of Medicine, Jinan, China
| | - Xiaoyu Li
- Department of Physiology, Shandong University School of Medicine, Jinan, China
| | - Jingxin Li
- Department of Physiology, Shandong University School of Medicine, Jinan, China
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Nitric oxide donors in sepsis: a systematic review of clinical and in vivo preclinical data. Shock 2009; 30:653-9. [PMID: 18497711 DOI: 10.1097/shk.0b013e3181777eef] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
An abundant literature in the field of sepsis focuses on the role of NO. Inhibiting NO synthesis corrects certain hemodynamic parameters of septic shock but failed to improve outcome in patients. Conversely, administration of NO donors lowers blood pressure but restores microcirculatory flow in patients with sepsis. We undertook a systematic review of the literature to comprehensively summarize the results of studies exploring the effects of systemic NO donors in sepsis. We included both clinical and preclinical data. We described the details surrounding NO donor administration, and the results obtained in each study were regrouped in broad categories. In the case of animal research, we limited our data collection to in vivo protocols and described the sepsis model. Finally, we critically appraised all the studies included in the review. Overall, the reviewed publications aimed for physiopathological description rather than clinical relevance and did not meet the required criteria for extrapolation to clinical practice. With this reserve, NO donors usually improved the outcomes measured (e.g., mortality, pulmonary hypertension, tissue/organ perfusion, etc.) but also lowered blood pressure. We conclude that our findings warrant further animal experimentation designed to maximize clinical relevance.
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Maezono S, Sugimoto KI, Sakamoto KI, Ohmori M, Hishikawa S, Mizuta K, Kawarasaki H, Watanabe Y, Fujimura A. Elevated blood concentrations of calcineurin inhibitors during diarrheal episode in pediatric liver transplant recipients: involvement of the suppression of intestinal cytochrome P450 3A and P-glycoprotein. Pediatr Transplant 2005; 9:315-23. [PMID: 15910387 DOI: 10.1111/j.1399-3046.2005.00315.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We encountered two cases of pediatric living-related liver transplant recipients who showed increases in blood concentration of cyclosporine or tacrolimus, a dual substrate for cytochrome P450 (CYP) 3A and P-glycoprotein (P-gp), during a diarrheal episode. To investigate the effect of intestinal inflammation on the metabolic and efflux pump activities, we conducted the experiments using the lipopolysaccharide (LPS)-induced intestinal damage model. Intestinal epithelial CYP3A activity was assessed by nifedipine oxidation using intestinal epithelial microsomes in rat. Drug efflux by P-gp was tested using digoxin flux with the excised intestine perfusion system in rats. Intraperitoneal injection of LPS (0.3 mg/kg) significantly reduced the intestinal epithelial CYP3A activity by 41% (p < 0.01). In the proximal jejunal segment of the rats treated with LPS, mucosal to serosal flux of digoxin was significantly enhanced compared to that of control (p < 0.05). Efflux of digoxin, which was taken up by intestinal epithelium, to mucosal perfusate was significantly blunted in the jejunum treated with LPS (p < 0.05), which indicates that the LPS treatment reduced the P-gp activity in rat small intestine. These findings suggest that the suppression of CYP3A and P-gp activities may be involved in the mechanism of elevated blood concentrations of cyclosporine and tacrolimus during enteritis-induced diarrhea. To prevent a drug-induced adverse effect, dose of a drug, which is a substrate of CYP3A or P-gp, should be reduced during such an episode.
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Affiliation(s)
- Sachiko Maezono
- Center for Clinical Pharmacology and Therapeutics, Jichi Medical School Hospital, Minamikawachi, Japan
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Adami A, Crivellente F, De Prati AC, Cavalieri E, Cuzzolin L, Tommasi M, Suzuki H, Benoni G. Biotransformation and cytotoxic properties of NO-donors on MCF7 and U251 cell lines. Life Sci 1998; 63:2097-105. [PMID: 9839533 DOI: 10.1016/s0024-3205(99)80006-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Previous studies have shown a role for nitric oxide (NO) as a cytotoxic effector. In the present work, two chemically different NO-donors such as glyceryl trinitrate (GTN) and S-nitroso-N-acetylpenicillamine (SNAP) were evaluated for both NO release and cytostatic/cytotoxic properties. Nitrite accumulation in the supernatant of MCF-7 and U251 cell lines indicated a greater and quickly release of NO derived from SNAP. A time-course of hemoglobin absorption spectral changes showed a greater release of NO derived from GTN in presence of cells compared to the values observed in the media, confirming that the release of NO by GTN can be enzymatic and non-enzymatic. On the contrary, SNAP generated NO without contribution of cellular components and saturated oxyhemoglobin quickly, within 2 hours. Both NO-donors inhibited thymidine incorporation in a similar manner and dose-dependently in U251 cells, but not in MCF-7 cells, where SNAP at the highest tested dose of 1000 microM induced only a 33% cytostatic effect. About trypan blue exclusion test, after 24 h GTN and SNAP, releasing similar amounts of NO, showed comparable cytotoxic effects on U251 cells (50% dead cells), but not on MCF-7 cells, where GTN resulted more cytotoxic. From our data, the "in vitro" antitumoral activity of NO-donors seems to be related to the type of tumor cell lines, to the amount and duration of NO release.
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Affiliation(s)
- A Adami
- Institute of Pharmacology, University of Verona, Italy
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