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Pal R, Chaudhary MJ, Tiwari PC, Babu S, Pant K. Protective role of theophylline and their interaction with nitric oxide (NO) in adjuvant-induced rheumatoid arthritis in rats. Int Immunopharmacol 2015; 29:854-862. [DOI: 10.1016/j.intimp.2015.08.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 07/22/2015] [Accepted: 08/27/2015] [Indexed: 01/22/2023]
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102
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Wojcik M, Zieleniak A, Zurawska-Klis M, Cypryk K, Wozniak LA. Increased expression of immune-related genes in leukocytes of patients with diagnosed gestational diabetes mellitus (GDM). Exp Biol Med (Maywood) 2015; 241:457-65. [PMID: 26568332 DOI: 10.1177/1535370215615699] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 10/14/2015] [Indexed: 12/16/2022] Open
Abstract
Compelling evidence indicates that the immune system is linked to metabolism in gestational diabetes mellitus (GDM), but factors participating in these processes still are awaiting identification. Inducible nitric oxide synthase, encoded by the NOS2 gene, and surfactant protein D, encoded by the SFTPD gene, have been implicated in diabetes. We investigated NOS2 and SFTPD mRNA levels in leukocytes obtained from 125 pregnant women with (n = 87) or without (control group; n = 38) GDM, and, in turn, correlated their expression with clinical parameters of subjects. Leukocytes were isolated from the blood of pregnant women and NOS2 and SFTPD expression in these cells was determined by quantitative real time PCR (qRT-PCR). Univariate correlation analyses were performed to assess an association between leukocyte NOS2 and SFTPD expression and clinical characteristics of patients. qRT-PCR experiments disclosed significantly increased leukocyte NOS2 and SFTPD mRNA levels in hyperglycemic GDM patients (P < 0.05). In the entire study group, there were significant positive associations of leukocyte NOS2 and SFTPD mRNAs with C-reactive protein. Additionally, transcript level of SFTPD also correlated positively with fasting glycemia and insulin resistance. This study demonstrates that an impaired glucose metabolism in GDM may be predominant predictor of leukocyte NOS2 and SFTPD overexpression in diabetic patients. Furthermore, alterations in the expression of these genes are associated with glucose metabolism dysfunction and/or inflammation during pregnancy. In addition, these findings support the utilization of leukocytes as good experimental model to study a relationship between immune-related genes and metabolic changes in women with GDM, as well as to assess the potential mechanisms underlying these alterations.
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Affiliation(s)
- Marzena Wojcik
- Department of Structural Biology, Faculty of Biomedical Sciences and Postgraduate Education, Medical University of Lodz, 90-752 Lodz, Poland
| | - Andrzej Zieleniak
- Department of Structural Biology, Faculty of Biomedical Sciences and Postgraduate Education, Medical University of Lodz, 90-752 Lodz, Poland
| | - Monika Zurawska-Klis
- Diabetology and Metabolic Diseases Department, Medical University of Lodz, 92-213 Lodz, Poland Diabetological Medical Center "OmniMed", 93-338 Lodz, Poland
| | - Katarzyna Cypryk
- Diabetology and Metabolic Diseases Department, Medical University of Lodz, 92-213 Lodz, Poland Diabetological Medical Center "OmniMed", 93-338 Lodz, Poland
| | - Lucyna Alicja Wozniak
- Department of Structural Biology, Faculty of Biomedical Sciences and Postgraduate Education, Medical University of Lodz, 90-752 Lodz, Poland
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Nagy-Grócz G, Tar L, Bohár Z, Fejes-Szabó A, Laborc KF, Spekker E, Vécsei L, Párdutz Á. The modulatory effect of anandamide on nitroglycerin-induced sensitization in the trigeminal system of the rat. Cephalalgia 2015; 36:849-61. [PMID: 26512068 DOI: 10.1177/0333102415613766] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 09/18/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND One of the human and animal models of migraine is the systemic administration of the nitric oxide donor (NO) nitroglycerin (NTG). NO can provoke migraine-like attacks in migraineurs and initiates a self-amplifying process in the trigeminal system, probably leading to central sensitization. Recent studies suggest that the endocannabinoid system is involved in nociceptive signal processing and cannabinoid receptor (CB) agonists are able to attenuate nociception in animal models of pain. AIM The purpose of the present study was to investigate the modulatory effects of a CB agonist anandamide (AEA) on the NTG-induced expression of transient receptor potential vanilloid type 1 (TRPV1), neuronal nitric oxide synthase (nNOS), nuclear factor kappa B (NF-κB), cyclooxygenase-2 (COX-2) and kynurenine aminotransferase-II (KAT-II) in the upper cervical spinal cord (C1-C2) of the rat, where most of the trigeminal nociceptive afferents convey. METHODS A half hour before and one hour after NTG (10 mg/kg) or placebo injection, adult male Sprague-Dawley rats (n = 44) were treated with AEA (2 × 5 mg/kg). Four hours after placebo/NTG injection, the animals were perfused and the cervical spinal cords were removed for immunohistochemistry and Western blotting. RESULTS AND CONCLUSION Our results show that NTG is able to increase TRPV1, nNOS, NF-κB and COX-2 and decrease KAT-II expression in the C1-C2 segments. On the other hand, we have found that AEA modulates the NTG-induced changes, thus it influences the activation and central sensitization process in the trigeminal system, probably via CBs.
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Affiliation(s)
- Gábor Nagy-Grócz
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - Lilla Tar
- Department of Neurology, University of Ulm, Germany
| | - Zsuzsanna Bohár
- MTA-SZTE Neuroscience Research Group, University of Szeged, Hungary
| | - Annamária Fejes-Szabó
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - Klaudia Flóra Laborc
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - Eleonóra Spekker
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - László Vécsei
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary MTA-SZTE Neuroscience Research Group, University of Szeged, Hungary
| | - Árpád Párdutz
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
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Involvement of prostaglandin I2 in nitric oxide-induced vasodilation of retinal arterioles in rats. Eur J Pharmacol 2015; 764:249-255. [DOI: 10.1016/j.ejphar.2015.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 06/06/2015] [Accepted: 07/03/2015] [Indexed: 01/22/2023]
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105
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Gallic Acid-g-Chitosan Modulates Inflammatory Responses in LPS-Stimulated RAW264.7 Cells Via NF-κB, AP-1, and MAPK Pathways. Inflammation 2015; 39:366-374. [DOI: 10.1007/s10753-015-0258-2] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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106
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Ko HJ, Ahn EK, Oh JS. N‑trans‑ρ‑caffeoyl tyramine isolated from Tribulus terrestris exerts anti‑inflammatory effects in lipopolysaccharide‑stimulated RAW 264.7 cells. Int J Mol Med 2015; 36:1042-8. [PMID: 26239676 DOI: 10.3892/ijmm.2015.2301] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 07/09/2015] [Indexed: 11/05/2022] Open
Abstract
Inflammation is induced by the expression of cyclooxygenase‑2 (COX‑2), which is an important mediator of chronic inflammatory diseases, such as rheumatoid arthritis, asthma and inflammatory bowel disease. Tribulus terrestris (T. terrestris) is known to have a beneficial effect on inflammatory diseases. In this study, we investigated the effects of N‑trans‑ρ‑caffeoyl tyramine (CT) isolated from T. terrestris on the production of nitric oxide (NO), and the expression of pro‑inflammatory cytokines and COX‑2 in lipopolysaccharide (LPS)‑stimulated RAW 264.7 cells. We also aimed to elucidate the molecular mechanisms involved. We found that the ethanolic extract of T. terrestris (EETT) and CT inhibited the production of NO, tumor necrosis factor‑α (TNF‑α), interleukin (IL)‑6 and IL‑10 in the LPS‑stimulated RAW 264.7 cells in a dose‑dependent manner. They were determined by reverse transcription-polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA). In addition, CT markedly suppressed the expression of COX‑2 and the production of prostaglandin E2 (PGE2) in response to LPS stimulation. Furthermore, CT markedly decreased p‑c‑Jun N‑terminal kinase (p‑JNK) protein expression in LPS‑stimulated RAW 264.7 cells. COX-2 and p-JNK were measured by western blot analysis. Taken together, these findings indicate that CT isolated from T. terrestris is a novel and potent modulator of inflammatory responses. Thus, it may prove benefiical to further evaluate CT as a possible treatment for chronic inflammatory diseases.
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Affiliation(s)
- Han-Jik Ko
- College of Pharmacy, Dankook University, Cheonan, Chungnam 330‑714, Republic of Korea
| | - Eun-Kyung Ahn
- Bio Center, Gyeonggi Institute of Science and Technology Promotion, Yeongtong-gu, Suwon-si, Gyeonggi-do 443‑270, Republic of Korea
| | - Joa Sub Oh
- College of Pharmacy, Dankook University, Cheonan, Chungnam 330‑714, Republic of Korea
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107
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Roth J, Blatteis CM. Mechanisms of fever production and lysis: lessons from experimental LPS fever. Compr Physiol 2015; 4:1563-604. [PMID: 25428854 DOI: 10.1002/cphy.c130033] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Fever is a cardinal symptom of infectious or inflammatory insults, but it can also arise from noninfectious causes. The fever-inducing agent that has been used most frequently in experimental studies designed to characterize the physiological, immunological and neuroendocrine processes and to identify the neuronal circuits that underlie the manifestation of the febrile response is lipopolysaccharide (LPS). Our knowledge of the mechanisms of fever production and lysis is largely based on this model. Fever is usually initiated in the periphery of the challenged host by the immediate activation of the innate immune system by LPS, specifically of the complement (C) cascade and Toll-like receptors. The first results in the immediate generation of the C component C5a and the subsequent rapid production of prostaglandin E2 (PGE2). The second, occurring after some delay, induces the further production of PGE2 by induction of its synthesizing enzymes and transcription and translation of proinflammatory cytokines. The Kupffer cells (Kc) of the liver seem to be essential for these initial processes. The subsequent transfer of the pyrogenic message from the periphery to the brain is achieved by neuronal and humoral mechanisms. These pathways subserve the genesis of early (neuronal signals) and late (humoral signals) phases of the characteristically biphasic febrile response to LPS. During the course of fever, counterinflammatory factors, "endogenous antipyretics," are elaborated peripherally and centrally to limit fever in strength and duration. The multiple interacting pro- and antipyretic signals and their mechanistic effects that underlie endotoxic fever are the subjects of this review.
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Affiliation(s)
- Joachim Roth
- Department of Veterinary Physiology and Biochemistry, Justus-Liebig-University, Giessen, Germany; Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee
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Kennedy-Lydon T, Crawford C, Wildman SS, Peppiatt-Wildman CM. Nonsteroidal anti-inflammatory drugs alter vasa recta diameter via pericytes. Am J Physiol Renal Physiol 2015. [PMID: 26202223 DOI: 10.1152/ajprenal.00199.2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We have previously shown that vasa recta pericytes are known to dilate vasa recta capillaries in the presence of PGE2 and contract vasa recta capillaries when endogenous production of PGE2 is inhibited by the nonselective nonsteroidal anti-inflammatory drug (NSAID) indomethacin. In the present study, we used a live rat kidney slice model to build on these initial observations and provide novel data that demonstrate that nonselective, cyclooxygenase-1-selective, and cyclooxygenase -2-selective NSAIDs act via medullary pericytes to elicit a reduction of vasa recta diameter. Real-time images of in situ vasa recta were recorded, and vasa recta diameters at pericyte and nonpericyte sites were measured offline. PGE2 and epoprostenol (a prostacyclin analog) evoked dilation of vasa recta specifically at pericyte sites, and PGE2 significantly attenuated pericyte-mediated constriction of vasa recta evoked by both endothelin-1 and ANG II. NSAIDs (indomethacin > SC-560 > celecoxib > meloxicam) evoked significantly greater constriction of vasa recta capillaries at pericyte sites than at nonpericyte sites, and indomethacin significantly attenuated the pericyte-mediated vasodilation of vasa recta evoked by PGE2, epoprostenol, bradykinin, and S-nitroso-N-acetyl-l-penicillamine. Moreover, a reduction in PGE2 was measured using an enzyme immune assay after superfusion of kidney slices with indomethacin. In addition, immunohistochemical techniques were used to demonstrate the population of EP receptors in the medulla. Collectively, these data demonstrate that pericytes are sensitive to changes in PGE2 concentration and may serve as the primary mechanism underlying NSAID-associated renal injury and/or further compound-associated tubular damage.
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Affiliation(s)
- Teresa Kennedy-Lydon
- Urinary System Physiology Unit, Medway School of Pharmacy, The Universities of Kent and Greenwich at Medway, Kent, United Kingdom
| | - Carol Crawford
- Urinary System Physiology Unit, Medway School of Pharmacy, The Universities of Kent and Greenwich at Medway, Kent, United Kingdom
| | - Scott S Wildman
- Urinary System Physiology Unit, Medway School of Pharmacy, The Universities of Kent and Greenwich at Medway, Kent, United Kingdom
| | - Claire M Peppiatt-Wildman
- Urinary System Physiology Unit, Medway School of Pharmacy, The Universities of Kent and Greenwich at Medway, Kent, United Kingdom
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Lee YY, Yang YP, Huang PI, Li WC, Huang MC, Kao CL, Chen YJ, Chen MT. Exercise suppresses COX-2 pro-inflammatory pathway in vestibular migraine. Brain Res Bull 2015; 116:98-105. [PMID: 26151770 DOI: 10.1016/j.brainresbull.2015.06.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 06/19/2015] [Accepted: 06/26/2015] [Indexed: 01/18/2023]
Abstract
Migraine and dizziness are relatively common disorders. Patients with dizziness have a higher incidence of migraines than the general population. The discomfort experienced by these patients is often poorly controlled by medication. However, the pathophysiology of vestibular migraine (VM) remains unclear. We hypothesized that patients with VM would experience remission from symptoms after exercise training and that this effect may be mediated through the suppression of cyclooxygenase-2 (COX-2)-mediated inflammation. Thus, the aim of the present study was to investigate the efficacy and possible anti-inflammatory benefits of exercise in patients with VM. We assessed the level of soluble inflammatory mediators in plasma from VM patients and control subjects. Our analysis of cytokine expression in the patients with VM undergoing exercise treatment revealed a significant reduction in pro-inflammatory cytokines and/or cytotoxic factors, such as tumor necrosis factor-α, interleukins, nitric oxide (NO), inducible NO synthase, and reactive oxygen species. In contrast, we found an increase in the level of anti-inflammatory cytokines after exercise. Moreover, the group undergoing exercise training showed significant symptomatic improvement and demonstrated suppressed antioxidant enzyme activity. To summarize, our data suggest that exercise significantly inhibits COX-2 activity, leading to the suppression of pro-inflammatory cytokines and changes in redox status. These results suggest that there is a molecular link between the central nervous system and the immune system. Furthermore, elucidation of the neurobiological mechanisms underlying VM could potentially lead to the development of novel therapeutic interventions for these patients.
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Affiliation(s)
- Yi-Yen Lee
- Institute of Clinical Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan; Division of Pediatric Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei 11217, Taiwan; Faculty of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan
| | - Yi-Ping Yang
- Institute of Clinical Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan; Faculty of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan
| | - Pin-I Huang
- Faculty of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan; Cancer Center, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei 11217, Taiwan
| | - Wen-Cheng Li
- Department of Occupation Medicine, Chang-Gung Memorial Hospital, Taipei, 199, Tung Hwa North Road, Taipei 105, Taiwan
| | - Ming-Chao Huang
- Division of Pediatric Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei 11217, Taiwan; Faculty of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan
| | - Chung-Lan Kao
- Faculty of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan; Department of Physical Medicine and Rehabilitation, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei 11217, Taiwan
| | - Yann-Jang Chen
- Institute of Clinical Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan; Department of Pediatrics, Renai Branch, Taipei City Hospital, No. 10, Sec. 4, Ren'ai Rd., Da'an Dist., Taipei City 106, Taiwan; Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei 11221, Taiwan
| | - Ming-Teh Chen
- Faculty of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 11221, Taiwan; Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, No.201, Sec.2, Shih-Pai Road, Taipei 11217, Taiwan.
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110
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Santoro A, Ferrante MC, Di Guida F, Pirozzi C, Lama A, Simeoli R, Clausi MT, Monnolo A, Mollica MP, Mattace Raso G, Meli R. Polychlorinated Biphenyls (PCB 101, 153, and 180) Impair Murine Macrophage Responsiveness to Lipopolysaccharide: Involvement of NF-κB Pathway. Toxicol Sci 2015; 147:255-69. [PMID: 26141388 PMCID: PMC7107302 DOI: 10.1093/toxsci/kfv127] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Non-dioxin-like (NDL) polychlorinated biphenyls (PCBs) are persistent organic pollutants, associated with a range of adverse health effects, including interference with the immune system. In this study, we investigate the capability of NDL-PCBs 101, 153, and 180, 3 of the 6 NDL-PCBs defined as indicators, to impair the immune response in lipopolysaccharide (LPS)-activated J774A.1 and primary murine macrophages. Our results clearly demonstrate that the exposure of J774A.1 and primary macrophages to NDL-PCB 153 or 180 or all NDL-PCBs mixtures causes a significant reduction in LPS-induced cytokine/chemokine synthesis, such as tumor necrosis factor-α and interleukin-6, together with monocyte chemoattractant protein-1, involved in cell recruitment. Moreover, PCBs were found to suppress LPS-stimulated NO production, and to reduce cyclooxygenase-2 and inducible nitric oxide synthase expression in J774A.1 and primary macrophages. At mechanistic level, PCBs significantly counteract the LPS-driven toll-like receptor (TLR) 4 and CD14 upregulation, therefore inhibiting downstream nuclear factor-κB (NF-κB) activation in J774A.1. Furthermore, PCBs determine a significant loss of macrophage endocytic capacity, a prerequisite for efficient antigen presentation. Taken together, these data indicate that NDL-PCBs reduce macrophage responsiveness, particularly when they are combined at concentrations per se inactive, impairing the capability to orchestrate a proper immune response to an infectious stimulus, disrupting TLR4/NF-κB pathway.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Maria Pina Mollica
- Department of Biology, University of Naples Federico II, 80131 Naples, Italy
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111
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Costa IASF, Hein TW, Secombes CJ, Gamperl AK. Recombinant interleukin-1β dilates steelhead trout coronary microvessels: effect of temperature and role of the endothelium, nitric oxide and prostaglandins. J Exp Biol 2015; 218:2269-78. [PMID: 26026045 PMCID: PMC4528702 DOI: 10.1242/jeb.119255] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/12/2015] [Indexed: 01/22/2023]
Abstract
Interleukin (IL)-1β is associated with hypotension and cardiovascular collapse in mammals during heat stroke, and the mRNA expression of this pro-inflammatory cytokine increases dramatically in the blood of Atlantic cod (Gadus morhua) at high temperatures. These data suggest that release of IL-1β at high temperatures negatively impacts fish cardiovascular function and could be a primary determinant of upper thermal tolerance in this taxa. Thus, we measured the concentration-dependent response of isolated steelhead trout (Oncorhynchus mykiss) coronary microvessels (<150 μm in diameter) to recombinant (r) IL-1β at two temperatures (10 and 20°C). Recombinant IL-1β induced a concentration-dependent vasodilation with vessel diameter increasing by approximately 8 and 30% at 10(-8) and 10(-7) mol l(-1), respectively. However, this effect was not temperature dependent. Both vessel denudation and cyclooxygenase blockade (by indomethacin), but not the nitric oxide (NO) antagonist L-NIO, inhibited the vasodilator effect of rIL-1β. In contrast, the concentration-dependent dilation caused by the endothelium-dependent calcium ionophore A23187 was completely abolished by L-NIO and indomethacin, suggesting that both NO and prostaglandin signaling mechanisms exist in the trout coronary microvasculature. These data: (1) are the first to demonstrate a functional link between the immune and cardiovascular systems in fishes; (2) suggest that IL-1β release at high temperatures may reduce systemic vascular resistance, and thus, the capacity of fish to maintain blood pressure; and (3) provide evidence that both NO and prostaglandins play a role in regulating coronary vascular tone, and thus, blood flow.
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Affiliation(s)
- Isabel A S F Costa
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada A1C 5S7
| | - Travis W Hein
- Department of Surgery, College of Medicine, Texas A&M Health Science Center, Baylor Scott & White Health, Temple, TX 76508, USA
| | - Christopher J Secombes
- School of Biological Sciences, Scottish Fish Immunology Research Centre, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - A Kurt Gamperl
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada A1C 5S7
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112
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Santos EC, Novaes RD, Bastos DSS, Oliveira JM, Penitente AR, Gonçalves WG, Cardoso SA, Talvani A, Oliveira LL. Modulation of oxidative and inflammatory cardiac response by nonselective 1- and 2-cyclooxygenase inhibitor and benznidazole in mice. ACTA ACUST UNITED AC 2015; 67:1556-66. [PMID: 26105111 DOI: 10.1111/jphp.12451] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 05/10/2015] [Indexed: 12/15/2022]
Abstract
OBJECTIVES This study investigated the combined effects of benznidazole (BZ) and ibuprofen (IB) on the oxidative and inflammatory status of the cardiac tissue in vivo. METHODS Swiss mice were randomized in groups receiving BZ (100 mg/kg) and IB (400 mg/kg) alone or combined (BZ + IB 200 or 400 mg/kg). Control animals were concurrently treated with 1% carboxymethyl cellulose. All treatments were administered orally for 7 days. KEY FINDINGS BZ treatment increased cardiac production of nitrogen/oxygen-reactive species, malondialdeyde, carbonyl proteins, prostaglandins as well as the activities of catalase, superoxide dismutase and glutathione peroxidase. These parameters were attenuated by IB, with the best results at higher dose. Individually, BZ and IB significantly reduced the tissue levels of chemokine ligand 2, tumour necrosis factor-α and IL-10, but no reduction was observed when the treatments were combined. CONCLUSIONS BZ triggers an oxidative and nitrosative route, which is associated with increased prostaglandin synthesis and marked damages to the lipids and proteins of the cardiac tissue. IB treatment attenuated reactive stresses triggered by BZ, which was an independent effects of this drug on the endogenous antioxidant enzymes. Individually, but not together, BZ and IB reduced the cardiac inflammatory status, indicating a beneficial and complex drug interaction.
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Affiliation(s)
- Eliziária C Santos
- Department of General Biology, Federal University of Viçosa, Viçosa, MG, Brazil
| | - Rômulo D Novaes
- Department of Structural Biology, Federal University of Alfenas, Alfenas, MG, Brazil
| | - Daniel S S Bastos
- Department of General Biology, Federal University of Viçosa, Viçosa, MG, Brazil
| | - Jerusa M Oliveira
- Department of General Biology, Federal University of Viçosa, Viçosa, MG, Brazil
| | - Arlete R Penitente
- Department of Biological Sciences, NUPEB, Federal University of Ouro Preto, Ouro Preto, MG, Brazil
| | - Wagner G Gonçalves
- Department of General Biology, Federal University of Viçosa, Viçosa, MG, Brazil
| | - Silvia A Cardoso
- Department of Medicine and Nursing, Federal University of Viçosa, Viçosa, MG, Brazil
| | - André Talvani
- Department of Biological Sciences, NUPEB, Federal University of Ouro Preto, Ouro Preto, MG, Brazil
| | - Leandro L Oliveira
- Department of General Biology, Federal University of Viçosa, Viçosa, MG, Brazil
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Stan MS, Sima C, Cinteza LO, Dinischiotu A. Silicon-based quantum dots induce inflammation in human lung cells and disrupt extracellular matrix homeostasis. FEBS J 2015; 282:2914-29. [PMID: 26032556 DOI: 10.1111/febs.13330] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/11/2015] [Accepted: 05/27/2015] [Indexed: 12/12/2022]
Abstract
Quantum dots (QDs) are nanocrystalline semiconductor materials that have been tested for biological applications such as cancer therapy, cellular imaging and drug delivery, despite the serious lack of information of their effects on mammalian cells. The present study aimed to evaluate the potential of Si/SiO2 QDs to induce an inflammatory response in MRC-5 human lung fibroblasts. Cells were exposed to different concentrations of Si/SiO2 QDs (25-200 μg·mL(-1)) for 24, 48, 72 and 96 h. The results obtained showed that uptake of QDs was dependent on biocorona formation and the stability of nanoparticles in various biological media (minimum essential medium without or with 10% fetal bovine serum). The cell membrane damage indicated by the increase in lactate dehydrogenase release after exposure to QDs was dose- and time-dependent. The level of lysosomes increased proportionally with the concentration of QDs, whereas an accumulation of autophagosomes was also observed. Cellular morphology was affected, as shown by the disruption of actin filaments. The enhanced release of nitric oxide and the increase in interleukin-6 and interleukin-8 protein expression suggested that nanoparticles triggered an inflammatory response in MRC-5 cells. QDs decreased the protein expression and enzymatic activity of matrix metalloproteinase (MMP)-2 and MMP-9 and also MMP-1 caseinase activity, whereas the protein levels of MMP-1 and tissue inhibitor of metalloproteinase-1 increased. The present study reveals for the first time that silicon-based QDs are able to generate inflammation in lung cells and cause an imbalance in extracellular matrix turnover through a differential regulation of MMPs and tissue inhibitor of metalloproteinase-1 protein expression.
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Affiliation(s)
- Miruna-Silvia Stan
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Romania
| | - Cornelia Sima
- National Institute for Laser, Plasma and Radiation Physics, Bucharest-Magurele, Romania
| | | | - Anca Dinischiotu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Romania
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Radu M, Dinu D, Sima C, Burlacu R, Hermenean A, Ardelean A, Dinischiotu A. Magnetite nanoparticles induced adaptive mechanisms counteract cell death in human pulmonary fibroblasts. Toxicol In Vitro 2015; 29:1492-502. [PMID: 26065626 DOI: 10.1016/j.tiv.2015.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 05/28/2015] [Accepted: 06/04/2015] [Indexed: 01/22/2023]
Abstract
Magnetite nanoparticles (MNP) have attracted great interest for biomedical applications due to their unique chemical and physical properties, but the MNP impact on human health is not fully known. Consequently, our study proposes to highlight the biochemical mechanisms that underline the toxic effects of MNP on a human lung fibroblast cell line (MRC-5). The cytotoxicity generated by MNP in MRC-5 cells was dose and time-dependent. MNP-treated MRC-5 cells accumulated large amount of iron and reactive oxygen species (ROS) and exhibited elevated antioxidant scavenger enzymes. Reduced glutathione (GSH) depletion and enhanced lipid peroxidation (LPO) processes were also observed. The cellular capacity to counteract the oxidative damage was sustained by high levels of heat shock protein 60 (Hsp60), a protein that confers resistance against ROS attack and inhibition of cell death. While significant augmentations in nitric oxide (NO) and prostaglandine E2 (PGE2) levels were detected after 72 h of MNP-exposure only, caspase-1 was activated earlier starting with 24h post-treatment. Taken together, our results suggest that MRC-5 cells have the capacity to develop cell protection mechanisms against MNP. Detailed knowledge of the mechanisms induced by MNP in cell culture could be essential for their prospective use in various in vivo biochemical applications.
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Affiliation(s)
- Mihaela Radu
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest 050095, Romania; Department of Histology, Faculty of Medicine, Pharmacy and Dentistry, Vasile Goldis Western University of Arad, 1 Feleacului, Arad 310396, Romania
| | - Diana Dinu
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest 050095, Romania
| | - Cornelia Sima
- Laser Department, National Institute of Laser, Plasma and Radiation Physics, 409 Atomistilor, Bucharest-Magurele 077125, Romania
| | - Radu Burlacu
- Department of Mathematics, University of Agriculture Sciences and Veterinary Medicine, 59 Marasti, Bucharest 011464, Romania
| | - Anca Hermenean
- Department of Histology, Faculty of Medicine, Pharmacy and Dentistry, Vasile Goldis Western University of Arad, 1 Feleacului, Arad 310396, Romania; Department of Experimental and Applied Biology, Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, Arad 310414, Romania
| | - Aurel Ardelean
- Department of Experimental and Applied Biology, Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, Arad 310414, Romania
| | - Anca Dinischiotu
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest 050095, Romania.
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Morphine Promotes Tumor Angiogenesis and Increases Breast Cancer Progression. BIOMED RESEARCH INTERNATIONAL 2015; 2015:161508. [PMID: 26064880 PMCID: PMC4433634 DOI: 10.1155/2015/161508] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 10/14/2014] [Indexed: 01/22/2023]
Abstract
Morphine is considered a highly potent analgesic agent used to relieve suffering of patients with cancer. Several in vitro and in vivo studies showed that morphine also modulates angiogenesis and regulates tumour cell growth. Unfortunately, the results obtained by these studies are still contradictory. In order to better dissect the role of morphine in cancer cell growth and angiogenesis we performed in vitro studies on ER-negative human breast carcinoma cells, MDA.MB231 and in vivo studies on heterotopic mouse model of human triple negative breast cancer, TNBC. We demonstrated that morphine in vitro enhanced the proliferation and inhibited the apoptosis of MDA.MB231 cells. In vivo studies performed on xenograft mouse model of TNBC revealed that tumours of mice treated with morphine were larger than those observed in other groups. Moreover, morphine was able to enhance the neoangiogenesis. Our data showed that morphine at clinical relevant doses promotes angiogenesis and increases breast cancer progression.
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Lee J, Martinez N, West K, Kornfeld H. Differential adjuvant activities of TLR7 and TLR9 agonists inversely correlate with nitric oxide and PGE2 production. PLoS One 2015; 10:e0123165. [PMID: 25875128 PMCID: PMC4395302 DOI: 10.1371/journal.pone.0123165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 02/18/2015] [Indexed: 01/17/2023] Open
Abstract
Activation of different pattern recognition receptors causes distinct profiles of innate immune responses, which in turn dictate the adaptive immune response. We found that mice had higher CD4+ T cell expansion to an immunogen, ovalbumin, when coadministered with CpG than with CL097 in vivo. To account for this differential adjuvanticity, we assessed the activities of CpG and CL097 on antigen-specific CD4+ T cell expansion in vitro using an OT-II CD4+ T cell/bone marrow-derived dendritic cell (DC) co-culture system. Unexpectedly, ovalbumin-stimulated expansion of OT-II CD4+ T cells in vitro was potently suppressed by both TLR agonists, with CL097 being stronger than CpG. The suppression was synergistically reversed by co-inhibition of cyclooxygenases 1 and 2, and inducible nitric oxide (NO) synthase. In addition, stimulation of OT-II CD4+ T cell/DC cultures with CL097 induced higher levels of CD4+ T cell death than stimulation with CpG, and this CD4+ T cell turnover was reversed by NO and PGE2 inhibition. Consistently, the co-cultures stimulated with CL097 produced higher levels of prostaglandin E2 (PGE2) and NO than stimulation with CpG. CL097 induced higher PGE2 production in DC cultures and higher IFN-γ in the OT-II CD4+ T cell/DC cultures, accounting for the high levels of PGE2 and NO. This study demonstrates that the adjuvant activities of immunostimulatory molecules may be determined by differential induction of negative regulators, including NO and PGE2 suppressing clonal expansion and promoting cell death of CD4+ T cells.
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Affiliation(s)
- Jinhee Lee
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
- * E-mail:
| | - Nuria Martinez
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Kim West
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Hardy Kornfeld
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
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Qadri Q, Rasool R, Gulzar GM, Naqash S, Shah ZA. H. pylori infection, inflammation and gastric cancer. J Gastrointest Cancer 2015; 45:126-32. [PMID: 24557546 DOI: 10.1007/s12029-014-9583-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION A strong association between chronic infection, inflammation, and cancer has been suggested. DISCUSSION Helicobacter pylori, a microaerophilic gram negative bacterium, infects about half the world's population. It has been defined as a definitive carcinogen in the pathogenesis of gastric cancer. H. pylori evades the host immune responses and persists in the stomach leading to gastritis gastric atrophy and sometimes gastric cancer. CONCLUSION Chronic H. pylori infection causes gastric cancer via two mechanisms: the presence of virulence factors and the induction of chronic inflammation which ultimately leads to neoplastic transformation.
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Affiliation(s)
- Qurteeba Qadri
- Department of Immunology and Molecular Medicine, Sher-i-Kashmir Institute of Medical Sciences (SKIMS), Soura, Srinagar, Jammu and Kashmir, 190011, India,
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Bazer FW, Johnson GA, Wu G. Amino Acids and Conceptus Development During the Peri-Implantation Period of Pregnancy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 843:23-52. [DOI: 10.1007/978-1-4939-2480-6_2] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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119
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Inaba H, Yoshigai E, Okuyama T, Murakoshi M, Sugiyama K, Nishino H, Nishizawa M. Antipyretic analgesic drugs have different mechanisms for regulation of the expression of inducible nitric oxide synthase in hepatocytes and macrophages. Nitric Oxide 2014; 44:61-70. [PMID: 25499030 DOI: 10.1016/j.niox.2014.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 11/14/2014] [Accepted: 12/02/2014] [Indexed: 12/25/2022]
Abstract
Antipyretic analgesic drugs (including non-steroidal anti-inflammatory drugs) inhibit cyclooxygenase-2 and inducible nitric oxide synthase (iNOS), resulting in decreases of the proinflammatory mediators prostaglandin E2 and nitric oxide (NO), respectively. Both mediators are regulated by nuclear factor-kappa B (NF-κB), a key transcription factor in inflammation. Few reports have compared the efficacy and potency of anti-inflammatory drugs as NO inhibitors. In our study, we examined the effects of four popular antipyretic analgesic drugs on NO production induced in hepatocytes and macrophages. Mouse RAW264.7 macrophages treated with bacterial lipopolysaccharide showed the highest efficacy with regard to NO production; aspirin, loxoprofen, ibuprofen, and acetaminophen dose-dependently suppressed NO induction. Ibuprofen showed the highest potency in suppressing the induced production of NO. In rat hepatocytes, all the drugs inhibited interleukin 1β-induced NO production and ibuprofen and loxoprofen inhibited NO induction effectively. Unexpectedly, the potency of NO suppression of each drug in hepatocytes did not always correlate with that observed in RAW264.7 cells. Microarray analyses of mRNA expression in hepatocytes revealed that the effects of the four antipyretic analgesic drugs modulated the NF-κB signaling pathway in a similar manner to the regulation of the expression of genes associated with inflammation, including the iNOS gene. However, the affected signal-transducing molecules in the NF-κB pathway were different for each drug. Therefore, antipyretic analgesic drugs may decrease NO production by modulating the NF-κB pathway in different ways, which could confer different efficacies and potencies with regard to their anti-inflammatory effects.
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Affiliation(s)
- Hiroyuki Inaba
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan; Research and Development Headquarters, Lion Corporation, Odawara, Kanagawa, Japan
| | - Emi Yoshigai
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Tetsuya Okuyama
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan; Graduate School of Science and Engineering, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Michiaki Murakoshi
- Research and Development Headquarters, Lion Corporation, Odawara, Kanagawa, Japan; Department of Biochemistry, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Keikichi Sugiyama
- Research and Development Headquarters, Lion Corporation, Odawara, Kanagawa, Japan; Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Hoyoku Nishino
- Department of Biochemistry, Kyoto Prefectural University of Medicine, Kyoto, Japan; Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Mikio Nishizawa
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan.
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Orellana JA, Busso D, Ramírez G, Campos M, Rigotti A, Eugenín J, von Bernhardi R. Prenatal nicotine exposure enhances Cx43 and Panx1 unopposed channel activity in brain cells of adult offspring mice fed a high-fat/cholesterol diet. Front Cell Neurosci 2014; 8:403. [PMID: 25520621 PMCID: PMC4251442 DOI: 10.3389/fncel.2014.00403] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 11/08/2014] [Indexed: 01/06/2023] Open
Abstract
Nicotine, the most important neuroteratogen of tobacco smoke, can reproduce brain and cognitive disturbances per se when administered prenatally. However, it is still unknown if paracrine signaling among brain cells participates in prenatal nicotine-induced brain impairment of adult offspring. Paracrine signaling is partly mediated by unopposed channels formed by connexins hemichannels (HCs) and pannexins serving as aqueous pores permeable to ions and small signaling molecules, allowing exchange between the intra- and extracellular milieus. Our aim was to address whether prenatal nicotine exposure changes the activity of those channels in adult mice offspring under control conditions or subjected to a second challenge during young ages: high-fat/cholesterol (HFC) diet. To induce prenatal exposure to nicotine, osmotic minipumps were implanted in CF1 pregnant mice at gestational day 5 to deliver nicotine bitartrate or saline (control) solutions. After weaning, offspring of nicotine-treated or untreated pregnant mice were fed ad libitum with chow or HFC diets for 8 weeks. The functional state of connexin 43 (Cx43) and pannexin 1 (Panx1) unopposed channels was evaluated by dye uptake experiments in hippocampal slices from 11-week-old mice. We found that prenatal nicotine increased the opening of Cx43 HCs in astrocytes, and Panx1 channels in microglia and neurons only if offspring mice were fed with HFC diet. Blockade of inducible nitric oxide synthase (iNOS), cyclooxygenase 2 (COX2) and prostaglandin E receptor 1 (EP1), ionotropic ATP receptor type 7 (P2X7) and NMDA receptors, showed differential inhibition of prenatal nicotine-induced channel opening in glial cells and neurons. Importantly, inhibition of the above mentioned enzymes and receptors, or blockade of Cx43 and Panx1 unopposed channels greatly reduced adenosine triphosphate (ATP) and glutamate release from hippocampal slices of prenatally nicotine-exposed offspring. We propose that unregulated gliotransmitter release through Cx43 and Panx1 unopposed channels may participate in brain alterations observed in offspring of mothers exposed to tobacco smoke during pregnancy.
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Affiliation(s)
- Juan A Orellana
- Departamento de Neurología, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Dolores Busso
- Departamento de Nutrición, Diabetes y Metabolismo, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile ; Centro de Nutrición Molecular y Enfermedades Crónicas, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Gigliola Ramírez
- Departamento de Neurología, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Marlys Campos
- Laboratorio de Sistemas Neurales, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Attilio Rigotti
- Departamento de Nutrición, Diabetes y Metabolismo, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile ; Centro de Nutrición Molecular y Enfermedades Crónicas, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Jaime Eugenín
- Laboratorio de Sistemas Neurales, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Rommy von Bernhardi
- Departamento de Neurología, Escuela de Medicina, Pontificia Universidad Católica de Chile Santiago, Chile
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121
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Fujii N, McGinn R, Stapleton JM, Paull G, Meade RD, Kenny GP. Evidence for cyclooxygenase-dependent sweating in young males during intermittent exercise in the heat. J Physiol 2014; 592:5327-39. [PMID: 25326453 PMCID: PMC4262342 DOI: 10.1113/jphysiol.2014.280651] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 10/02/2014] [Indexed: 01/22/2023] Open
Abstract
Our recent work implicated nitric oxide (NO) in the control of sweating during intermittent exercise; however, it is unclear if cyclooxygenase (COX) is also involved. On separate days, ten healthy young (24 ± 4 years) males cycled in the heat (35°C). Two 30 min exercise bouts were performed at either a moderate (400 W, moderate heat load) or high (700 W, high heat load) rate of metabolic heat production and were followed by 20 and 40 min of recovery, respectively. Forearm sweating (ventilated capsule) was evaluated at four skin sites that were continuously perfused via intradermal microdialysis with: (1) lactated Ringer solution (Control), (2) 10 mm ketorolac (a non-selective COX inhibitor), (3) 10 mm N G-nitro-l -arginine methyl ester (l -NAME; a non-selective NO synthase inhibitor) or (4) a combination of 10 mm ketorolac + 10 mm l -NAME. During the last 5 min of the first exercise at moderate heat load, forearm sweating (mg min−1 cm−2) was equivalently reduced with ketorolac (0.54 ± 0.08), l -NAME (0.55 ± 0.07) and ketorolac+l -NAME (0.56 ± 0.08) compared to Control (0.67 ± 0.06) (all P < 0.05). Similar results were obtained for the second exercise at moderate heat load (all P < 0.05). However, forearm sweating was similar between the four sites during exercise at high heat load and during recovery regardless of exercise intensity (all P > 0.05). We show that (1) although both COX and NO modulate forearm sweating during intermittent exercise bouts in the heat at a moderate heat load, the effects are not additive, and (2) the contribution of both enzymes to forearm sweating is less evident during intermittent exercise when the heat load is high and during recovery.
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Affiliation(s)
- Naoto Fujii
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Ryan McGinn
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Jill M Stapleton
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Gabrielle Paull
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Robert D Meade
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Glen P Kenny
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
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Fujii N, McGinn R, Paull G, Stapleton JM, Meade RD, Kenny GP. Cyclooxygenase inhibition does not alter methacholine-induced sweating. J Appl Physiol (1985) 2014; 117:1055-62. [PMID: 25213633 PMCID: PMC4217047 DOI: 10.1152/japplphysiol.00644.2014] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/04/2014] [Indexed: 01/22/2023] Open
Abstract
Cholinergic agents (e.g., methacholine) induce cutaneous vasodilation and sweating. Reports indicate that either nitric oxide (NO), cyclooxygenase (COX), or both can contribute to cholinergic cutaneous vasodilation. Also, NO is reportedly involved in cholinergic sweating; however, whether COX contributes to cholinergic sweating is unclear. Forearm sweat rate (ventilated capsule) and cutaneous vascular conductance (CVC, laser-Doppler perfusion units/mean arterial pressure) were evaluated in 10 healthy young (24 ± 4 yr) adults (7 men, 3 women) at four skin sites that were continuously perfused via intradermal microdialysis with 1) lactated Ringer (control), 2) 10 mM ketorolac (a nonselective COX inhibitor), 3) 10 mM N(G)-nitro-l-arginine methyl ester (l-NAME, a nonselective NO synthase inhibitor), or 4) a combination of 10 mM ketorolac + 10 mM l-NAME. At the four skin sites, methacholine was simultaneously infused in a dose-dependent manner (1, 10, 100, 1,000, 2,000 mM). Relative to the control site, forearm CVC was not influenced by ketorolac throughout the protocol (all P > 0.05), whereas l-NAME and ketorolac + l-NAME reduced forearm CVC at and above 10 mM methacholine (all P < 0.05). Conversely, there was no main effect of treatment site (P = 0.488) and no interaction of methacholine dose and treatment site (P = 0.711) on forearm sweating. Thus forearm sweating (in mg·min(-1)·cm(-2)) from baseline up to the maximal dose of methacholine was not different between the four sites (at 2,000 mM, control 0.50 ± 0.23, ketorolac 0.44 ± 0.23, l-NAME 0.51 ± 0.22, and ketorolac + l-NAME 0.51 ± 0.23). We show that both NO synthase and COX inhibition do not influence cholinergic sweating induced by 1-2,000 mM methacholine.
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Affiliation(s)
- Naoto Fujii
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Ryan McGinn
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Gabrielle Paull
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Jill M Stapleton
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Robert D Meade
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Glen P Kenny
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
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Shao Y, Cheng Z, Li X, Chernaya V, Wang H, Yang XF. Immunosuppressive/anti-inflammatory cytokines directly and indirectly inhibit endothelial dysfunction--a novel mechanism for maintaining vascular function. J Hematol Oncol 2014; 7:80. [PMID: 25387998 PMCID: PMC4236671 DOI: 10.1186/s13045-014-0080-6] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 10/13/2014] [Indexed: 12/14/2022] Open
Abstract
Endothelial dysfunction is a pathological status of the vascular system, which can be broadly defined as an imbalance between endothelium-dependent vasoconstriction and vasodilation. Endothelial dysfunction is a key event in the progression of many pathological processes including atherosclerosis, type II diabetes and hypertension. Previous reports have demonstrated that pro-inflammatory/immunoeffector cytokines significantly promote endothelial dysfunction while numerous novel anti-inflammatory/immunosuppressive cytokines have recently been identified such as interleukin (IL)-35. However, the effects of anti-inflammatory cytokines on endothelial dysfunction have received much less attention. In this analytical review, we focus on the recent progress attained in characterizing the direct and indirect effects of anti-inflammatory/immunosuppressive cytokines in the inhibition of endothelial dysfunction. Our analyses are not only limited to the importance of endothelial dysfunction in cardiovascular disease progression, but also expand into the molecular mechanisms and pathways underlying the inhibition of endothelial dysfunction by anti-inflammatory/immunosuppressive cytokines. Our review suggests that anti-inflammatory/immunosuppressive cytokines serve as novel therapeutic targets for inhibiting endothelial dysfunction, vascular inflammation and cardio- and cerebro-vascular diseases.
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Affiliation(s)
- Ying Shao
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Zhongjian Cheng
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Xinyuan Li
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Valeria Chernaya
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Hong Wang
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Xiao-feng Yang
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA. .,Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, PA, 19140, USA.
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Schweighöfer H, Rummel C, Mayer K, Rosengarten B. Brain function in iNOS knock out or iNOS inhibited (l-NIL) mice under endotoxic shock. Intensive Care Med Exp 2014; 2:24. [PMID: 26266921 PMCID: PMC4513038 DOI: 10.1186/s40635-014-0024-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 08/14/2014] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Microcirculatory dysfunction due to excessive nitric oxide production by the inducible nitric oxide synthase (iNOS) is often seen as a motor of sepsis-related organ dysfunction. Thus, blocking iNOS may improve organ function. Here, we investigated neuronal functional integrity in iNOS knock out (-/-) or l-NIL-treated wild-type (wt) animals in an endotoxic shock model. METHODS Four groups of each 10 male mice (28 to 32 g) were studied: wt, wt + lipopolysaccharide (LPS) (5 mg/kg body weight i.v.), iNOS(-/-) + LPS, wt + LPS + l-NIL (5 mg/kg body weight i.p. 30 min before LPS). Electric forepaw stimulation was performed before LPS/vehicle and then at fixed time points repeatedly up to 4.5 h. N1-P1 potential amplitudes as well as P1 latencies were calculated from EEG recordings. Additionally, cerebral blood flow was registered using laser Doppler. Blood gas parameters, mean arterial blood pressure, and glucose and lactate levels were obtained at the beginning and the end of experiments. Moreover, plasma IL-6, IL-10, CXCL-5, ICAM-1, neuron-specific enolase (NSE), and nitrate/nitrite levels were determined. RESULTS Decline in blood pressure, occurrence of cerebral hyperemia, acidosis, and increase in lactate levels were prevented in both iNOS-blocked groups. SEP amplitudes and NSE levels remained in the range of controls. Effects were related to a blocked nitrate/nitrite level increase whereas IL-6, ICAM-1, and IL-10 were similarly induced in all sepsis groups. Only CXCL-5 induction was lower in both iNOS-blocked groups. CONCLUSIONS Despite similar hyper-inflammatory responses, iNOS inhibition strategies appeared neurofunctionally protective possibly by stabilizing macro- as well as microcirculation. Overall, our data support modern sepsis guidelines recommending early prevention of microcirculatory failure.
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Affiliation(s)
- Hanna Schweighöfer
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany,
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Madden MC, Stevens T, Case M, Schmitt M, Diaz-Sanchez D, Bassett M, Montilla TS, Berntsen J, Devlin RB. Diesel exhaust modulates ozone-induced lung function decrements in healthy human volunteers. Part Fibre Toxicol 2014; 11:37. [PMID: 25178924 PMCID: PMC4354281 DOI: 10.1186/s12989-014-0037-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 08/05/2014] [Indexed: 01/22/2023] Open
Abstract
The potential effects of combinations of dilute whole diesel exhaust (DE) and ozone (O₃), each a common component of ambient airborne pollutant mixtures, on lung function were examined. Healthy young human volunteers were exposed for 2 hr to pollutants while exercising (~50 L/min) intermittently on two consecutive days. Day 1 exposures were either to filtered air, DE (300 μg/m³), O₃ (0.300 ppm), or the combination of both pollutants. On Day 2 all exposures were to O₃ (0.300 ppm), and Day 3 served as a followup observation day. Lung function was assessed by spirometry just prior to, immediately after, and up to 4 hr post-exposure on each exposure day. Functional pulmonary responses to the pollutants were also characterized based on stratification by glutathione S-transferase mu 1 (GSTM1) genotype. On Day 1, exposure to air or DE did not change FEV1 or FVC in the subject population (n = 15). The co-exposure to O₃ and DE decreased FEV1 (17.6%) to a greater extent than O₃ alone (9.9%). To test for synergistic exposure effects, i.e., in a greater than additive fashion, FEV1 changes post individual O₃ and DE exposures were summed together and compared to the combined DE and O₃ exposure; the p value was 0.057. On Day 2, subjects who received DE exposure on Day 1 had a larger FEV1 decrement (14.7%) immediately after the O₃ exposure than the individuals' matched response following a Day 1 air exposure (10.9%). GSTM1 genotype did not affect the magnitude of lung function changes in a significant fashion. These data suggest that altered respiratory responses to the combination of O₃ and DE exposure can be observed showing a greater than additive manner. In addition, O₃-induced lung function decrements are greater with a prior exposure to DE compared to a prior exposure to filtered air. Based on the joint occurrence of these pollutants in the ambient environment, the potential exists for interactions in more than an additive fashion affecting lung physiological processes.
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Affiliation(s)
- Michael C Madden
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
- U.S EPA Human Studies Facility, 104 Mason Farm Road, Chapel Hill, NC, 27599-7315, USA.
| | - Tina Stevens
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
- Currently ORISE, Research Triangle Park, Chapel Hill, NC, 27711, USA.
| | - Martin Case
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
| | - Michael Schmitt
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
| | - David Diaz-Sanchez
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
| | - Maryann Bassett
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
| | - Tracey S Montilla
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
| | | | - Robert B Devlin
- EPHD, NHEERL, US EPA, Research Triangle Park, Chapel Hill, NC, 27711, USA.
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126
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Zamberlam G, Sahmi F, Price CA. Nitric oxide synthase activity is critical for the preovulatory epidermal growth factor-like cascade induced by luteinizing hormone in bovine granulosa cells. Free Radic Biol Med 2014; 74:237-44. [PMID: 24992832 DOI: 10.1016/j.freeradbiomed.2014.06.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 06/16/2014] [Accepted: 06/19/2014] [Indexed: 01/22/2023]
Abstract
In rabbits and rodents, nitric oxide (NO) is generally considered to be critical for ovulation. In monovulatory species, however, the importance of NO has not been determined, nor is it clear where in the preovulatory cascade NO may act. The objectives of this study were (1) to determine if nitric oxide synthase (NOS) enzymes are regulated by luteinizing hormone (LH) and (2) to determine if and where endogenous NO is critical for expression of genes essential for the ovulatory cascade in bovine granulosa cells in serum-free culture. Time- and dose-response experiments demonstrated that LH had a significant stimulatory effect on endothelial NOS (NOS3) mRNA abundance, but in a prostaglandin-dependent manner. NO production was stimulated by LH before a detectable increase in NOS3 mRNA levels was observed. Pretreatment of cells with the NOS inhibitor L-NAME blocked the effect of LH on the epidermal growth factor (EGF)-like ligands epiregulin and amphiregulin, as well as prostaglandin-endoperoxide synthase-2 mRNA abundance and protein levels. Similarly, EGF treatment increased mRNA encoding epiregulin, amphiregulin, and the early response gene EGR1, and this was inhibited by pretreatment with L-NAME. Interestingly, pretreatment with L-NAME had no effect on either ERK1/2 or AKT activation. Taken together, these results suggest that endogenous NOS activity is critical for the LH-induced ovulatory cascade in granulosa cells of a monotocous species and acts downstream of EGF receptor activation but upstream of the EGF-like ligands.
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Affiliation(s)
- Gustavo Zamberlam
- Centre de Recherche en Reproduction Animale, Faculty of Veterinary Medicine, University of Montreal, St-Hyacinthe, QC J2S 7C6, Canada
| | - Fatiha Sahmi
- Centre de Recherche en Reproduction Animale, Faculty of Veterinary Medicine, University of Montreal, St-Hyacinthe, QC J2S 7C6, Canada
| | - Christopher A Price
- Centre de Recherche en Reproduction Animale, Faculty of Veterinary Medicine, University of Montreal, St-Hyacinthe, QC J2S 7C6, Canada.
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127
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The analgesic and anti-inflammatory effects of Litsea japonica fruit are mediated via suppression of NF-κB and JNK/p38 MAPK activation. Int Immunopharmacol 2014; 22:84-97. [DOI: 10.1016/j.intimp.2014.06.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/22/2014] [Accepted: 06/03/2014] [Indexed: 12/16/2022]
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128
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BAO JIAPENG, JIANG LIFENG, LI JING, CHEN WEIPING, HU PENGFEI, WU LIDONG. Visceral adipose tissue-derived serine protease inhibitor inhibits interleukin-1β-induced catabolic and inflammatory responses in murine chondrocytes. Mol Med Rep 2014; 10:2191-7. [DOI: 10.3892/mmr.2014.2478] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 05/30/2014] [Indexed: 11/06/2022] Open
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129
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CHOI WOOSUK, JEONG JINWOO, KIM SUNGOK, KIM GIYOUNG, KIM BYUNGWOO, KIM CHEOLMIN, SEO YONGBAE, KIM WOEYEON, LEE SANGYEOL, JO KWONHO, CHOI YOUNGJU, CHOI YUNGHYUN, KIM GUNDO. Anti-inflammatory potential of peat moss extracts in lipopolysaccharide-stimulated RAW 264.7 macrophages. Int J Mol Med 2014; 34:1101-9. [DOI: 10.3892/ijmm.2014.1881] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 07/17/2014] [Indexed: 11/06/2022] Open
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130
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Saleh LA, Hamza M, El Gayar NH, Abd El-Samad AA, Nasr EA, Masoud SI. Ibuprofen suppresses depressive like behavior induced by BCG inoculation in mice: role of nitric oxide and prostaglandin. Pharmacol Biochem Behav 2014; 125:29-39. [PMID: 25101545 DOI: 10.1016/j.pbb.2014.07.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 07/08/2014] [Accepted: 07/26/2014] [Indexed: 01/22/2023]
Abstract
Prostaglandins (PGs) and nitric oxide (NO) may be involved in the pathophysiology of depression. Since NSAIDs decrease PGs and NO production, they may have an antidepressant effect. The aim of the present work was to explore a possible antidepressant action of ibuprofen in the new model of Bacillus Calmette-Guerin (BCG) induced depression. Mice injected with BCG (10(7) CFU/mouse intraperitoneally) showed an increase in the total immobility time during the forced swim test (FST) and the tail suspension test (TST) and an increase in cerebral PGE2 and NO levels. Fluoxetine administered in drinking water at a dose of 80 mg/l, 5 days before BCG and for 2 more weeks resulted in significant decrease in total immobility time during FST and TST and in cerebral PGE2 and NO levels. Both ibuprofen (200 mg/l) and L-NAME (1 g/l) administered in drinking water 24 h before BCG and for 2 more weeks resulted in decrease in the total immobility time during FST and TST and in cerebral PGE2 and NO levels, which was comparable to fluoxetine's effect. On the other hand, l-arginine administered at a dose of 6 g/l in drinking water together with ibuprofen or fluoxetine reversed their effect on FST, TST and cerebral PGE2 and NO levels. Immunohistochemistry showed a decrease in COX-1 and i-NOS immunoreactivity in the CA1 and CA3 areas of the hippocampus following ibuprofen treatment. These results suggest that ibuprofen may have an antidepressant effect through inhibition of PGE2 and NO production, especially in depression secondary to chronic inflammation.
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Affiliation(s)
- Lobna A Saleh
- Dept. of Pharmacology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - May Hamza
- Dept. of Pharmacology, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
| | - Nesreen H El Gayar
- Dept. of Pharmacology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | | | - Essam A Nasr
- Dept. of Bacterial Diagnostic Products Research (Tuberculosis), Veterinary Serum and Vaccine Research Institute, Cairo, Egypt
| | - Somaia I Masoud
- Dept. of Pharmacology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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131
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Jakhar R, Paul S, Chauhan AK, Kang SC. Morin hydrate augments phagocytosis mechanism and inhibits LPS induced autophagic signaling in murine macrophage. Int Immunopharmacol 2014; 22:356-65. [PMID: 25068824 DOI: 10.1016/j.intimp.2014.07.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/01/2014] [Accepted: 07/16/2014] [Indexed: 01/08/2023]
Abstract
Morin, a natural flavonoid that is the primary bioactive constituent of the family Moraceae, has been found to be associated with many therapeutic properties. In this study, we evaluated the immunomodulatory activities of increasing concentration of morin hydrate in vitro. Three different concentrations of morin hydrate (5, 10, and 15μM) were used to evaluate their effect on splenocyte proliferation, phagocytic activity of macrophages, cytokine secretion and complement inhibition. We also evaluated the role of morin hydrate on lipopolysaccharide (LPS) induced autophagy. Our study demonstrated that morin hydrate elicited a significant increase in splenocyte proliferation, phagocytic capacity and suppressed the production of cytokines and nitric oxide in activated macrophages. Humoral immunity measured by anti-complement activity showed an increase in inhibition of the complement system after the addition of morin hydrate, where morin hydrate at 15μM concentration induced a significant inhibition. Depending on our results, we can also conclude that morin hydrate protects macrophages from LPS induced autophagic cell death. Our findings suggest that morin hydrate represents a structurally diverse class of flavonoid and this structural variability can profoundly affect its cell-type specificity and its biological activities. Supplementation of immune cells with morin hydrate has an upregulating and immunoprotective effect that shows potential as a countermeasure to the immune dysfunction and suggests an interesting use in inflammation related diseases.
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Affiliation(s)
- Rekha Jakhar
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea
| | - Souren Paul
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea
| | - Anil Kumar Chauhan
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea
| | - Sun Chul Kang
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea.
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132
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Synthesis, structure elucidation, and anti-inflammatory/anti-cancer/anti-bacterial activities of novel (Z)-3-adamantyl-1-aryl-prop/but-2-en-1-ones. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1086-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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133
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Kim EA, Han AR, Choi J, Ahn JY, Choi SY, Cho SW. Anti-inflammatory mechanisms of N-adamantyl-4-methylthiazol-2-amine in lipopolysaccharide-stimulated BV-2 microglial cells. Int Immunopharmacol 2014; 22:73-83. [PMID: 24975832 DOI: 10.1016/j.intimp.2014.06.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 06/03/2014] [Accepted: 06/10/2014] [Indexed: 01/03/2023]
Abstract
The activation of microglia is crucially associated with the neurodegeneration observed in many neuroinflammatory pathologies, such as multiple sclerosis, Parkinson's disease, and Alzheimer's disease. We have examined various thiazole derivatives with the goal of developing new anti-neuroinflammatory drugs. Thiazole derivatives are attractive candidates for drug development, because they are efficiently synthesized and active against a number of disease organisms and conditions, including neurodegenerative disorders. The present study investigated the effects of a new compound, N-adamantyl-4-methylthiazol-2-amine (KHG26693), against lipopolysaccharide (LPS)-induced inflammation in cultured BV-2 microglial cells. KHG26693 suppressed several inflammatory responses in LPS-activated cells, as evidenced by decreased levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), hydrogen peroxide (H(2)O(2)), reactive oxygen species (ROS), nitric oxide (NO), and lipid peroxidation. These anti-inflammatory/antioxidative actions occurred as a result of the downregulation of NADPH oxidase (NOX), inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) content, but not as a result of the upregulation of superoxide dismutase (SOD) or catalase activity. The pharmacological properties of KHG26693 were also facilitated via inhibition of both the cluster of differentiation 14 (CD14)/toll-like receptor 4 (TLR4)-dependent nuclear factor kappa B (NF-κB) signaling pathway and extracellular signal-regulated kinase (ERK) phosphorylation. Furthermore, KHG26693 successfully blocked the migration of LPS-activated microglia, most likely by modulating the ERK pathway. Taken together, these results demonstrate that the anti-inflammatory and antioxidative actions of KHG26693 are mediated, at least in part, through the control of microglial activation.
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Affiliation(s)
- Eun-A Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - A Reum Han
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Jiyoung Choi
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Jee-Yin Ahn
- Department of Molecular Cell Biology, Center for Molecular Medicine, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Soo Young Choi
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chunchon 200-702, Republic of Korea
| | - Sung-Woo Cho
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea.
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134
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Ryu JS, Jung YH, Cho MY, Yeo JE, Choi YJ, Kim YI, Koh YG. Co-culture with human synovium-derived mesenchymal stem cells inhibits inflammatory activity and increases cell proliferation of sodium nitroprusside-stimulated chondrocytes. Biochem Biophys Res Commun 2014; 447:715-20. [DOI: 10.1016/j.bbrc.2014.04.077] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 04/15/2014] [Indexed: 01/15/2023]
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135
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Effects of paracetamol on NOS, COX, and CYP activity and on oxidative stress in healthy male subjects, rat hepatocytes, and recombinant NOS. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:212576. [PMID: 24799980 PMCID: PMC3988730 DOI: 10.1155/2014/212576] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 02/26/2014] [Indexed: 01/08/2023]
Abstract
Paracetamol (acetaminophen) is a widely used analgesic drug. It interacts with various enzyme families including cytochrome P450 (CYP), cyclooxygenase (COX), and nitric oxide synthase (NOS), and this interplay may produce reactive oxygen species (ROS). We investigated the effects of paracetamol on prostacyclin, thromboxane, nitric oxide (NO), and oxidative stress in four male subjects who received a single 3 g oral dose of paracetamol. Thromboxane and prostacyclin synthesis was assessed by measuring their major urinary metabolites 2,3-dinor-thromboxane B2 and 2,3-dinor-6-ketoprostaglandin F1α, respectively. Endothelial NO synthesis was assessed by measuring nitrite in plasma. Urinary 15(S)-8-iso-prostaglanding F2α was measured to assess oxidative stress. Plasma oleic acid oxide (cis-EpOA) was measured as a marker of cytochrome P450 activity. Upon paracetamol administration, prostacyclin synthesis was strongly inhibited, while NO synthesis increased and thromboxane synthesis remained almost unchanged. Paracetamol may shift the COX-dependent vasodilatation/vasoconstriction balance at the cost of vasodilatation. This effect may be antagonized by increasing endothelial NO synthesis. High-dosed paracetamol did not increase oxidative stress. At pharmacologically relevant concentrations, paracetamol did not affect NO synthesis/bioavailability by recombinant human endothelial NOS or inducible NOS in rat hepatocytes. We conclude that paracetamol does not increase oxidative stress in humans.
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136
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Haghighi L, Homam H, Raoofi Z, Najmi Z. Intravaginal isosorbide dinitrate or misoprostol for cervical ripening prior to induction of labour: a randomised controlled trial. J OBSTET GYNAECOL 2014; 33:272-6. [PMID: 23550856 DOI: 10.3109/01443615.2012.753422] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In this randomised double-blind controlled trial, 130 healthy pregnant women with term pregnancy who scheduled for labour induction with Bishop's score < 5, were recruited. They were assigned randomly to vaginal administration of isosorbide dinitrate (ISDN) (40 mg) or misoprostol (25 μg), which were repeated after 4 h as needed. The efficacies of medications were evaluated by predetermined primary and secondary outcome variables for cervical ripening and induction of labour and delivery. There was no significant difference in Bishop's score 8 h after drug administration between the ISDN and misoprostol groups. However, in the ISDN group, labour induction was needed more frequently and the time from start of medication to the beginning of active phase of labour was significantly longer.
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Affiliation(s)
- L Haghighi
- Department of Obstetrics and Gynecology, Tehran University of Medical Sciences, Tehran, Iran.
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137
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Tanaka K, Shimizu T, Higashi Y, Nakamura K, Taniuchi K, Dimitriadis F, Shimizu S, Yokotani K, Saito M. Central bombesin possibly induces S-nitrosylation of cyclooxygenase-1 in pre-sympathetic neurons of rat hypothalamic paraventricular nucleus. Life Sci 2014; 100:85-96. [PMID: 24530741 DOI: 10.1016/j.lfs.2014.01.079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 01/16/2014] [Accepted: 01/30/2014] [Indexed: 01/22/2023]
Abstract
AIMS Cyclooxygenase (COX) can be activated by nitric oxide-induced (NO-induced) conversion of cysteine thiol group of COX into S-nitrosothiol. We previously reported the involvement of brain COX/NO synthase (NOS) in centrally administered bombesin-, a stress-related neuropeptide, induced secretion of rat adrenal noradrenaline and adrenaline. To examine a possible involvement of the NO-induced modification of COX in bombesin-induced response, we investigated whether bombesin induces close proximity of COX-1 and neuronal NOS (nNOS) or S-nitroso-cysteine in pre-sympathetic spinally projecting neurons in the rat hypothalamic paraventricular nucleus (PVN), a regulatory center of adrenomedullary outflow. MAIN METHODS In twelve-week-old male Wistar rats, pre-sympathetic spinally projecting neurons in the PVN were labeled with a retrograde tracer Fluoro-Gold (FG). After intracerebroventricular administration of bombesin, we performed double immunohistochemical analysis for Fos and COX-1 or nNOS in FG-labeled PVN neurons. We also performed a fluorescent in situ proximity ligation assay (PLA) for visualizing of close proximity (<40 nm) of COX-1 with nNOS or S-nitroso-cysteine. KEY FINDINGS Bombesin significantly increased the number of Fos-immunoreactive cells in FG-labeled PVN neurons with COX-1 or nNOS immunoreactivity. 7-Nitroindazole, a selective nNOS inhibitor, abolished Fos-immunoreactivity induced by bombesin in COX-1-immunoreactive FG-labeled PVN neurons. Bombesin also induced PLA-positive signals indicating close proximity of COX-1/nNOS and COX-1/S-nitroso-cysteine in FG-labeled PVN neurons. SIGNIFICANCE Centrally administered bombesin possibly induces S-nitrosylation of COX-1 through close proximity of COX-1 and nNOS in pre-sympathetic spinally projecting PVN neurons, thereby activating COX-1 during the bombesin-induced activation of central adrenomedullary outflow in the rat.
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Affiliation(s)
- Kenjiro Tanaka
- Department of Pharmacology, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan
| | - Takahiro Shimizu
- Department of Pharmacology, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan.
| | - Youichirou Higashi
- Department of Neurosurgery, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan
| | - Kumiko Nakamura
- Department of Pharmacology, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan
| | - Keisuke Taniuchi
- Department of Pharmacology, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan
| | - Fotios Dimitriadis
- B' Urologic Department, Papageorgiou General Hospital, Aristotle University School of Medicine, Thessaloniki, Greece
| | - Shogo Shimizu
- Division of Molecular Pharmacology, Tottori University School of Medicine, Yonago, Tottori 683-8503, Japan
| | - Kunihiko Yokotani
- Department of Pharmacology, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan
| | - Motoaki Saito
- Department of Pharmacology, Kochi University School of Medicine, Nankoku, Kochi 783-8505, Japan
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138
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Cairns BE, Laursen JC, Dong XD, Gazerani P. Intraganglionic injection of a nitric oxide donator induces afferent mechanical sensitization that is attenuated by palmitoylethanolamide. Cephalalgia 2014; 34:686-694. [PMID: 24519701 DOI: 10.1177/0333102414521510] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM The aim of this article is to investigate whether the nitric oxide (NO) donator diethylenetriamine/nitric oxide (DETA/NO) affects trigeminal sensory processing through the trigeminal ganglion in part by activating trigeminal satellite glial cells (SGCs) and whether this effect is attenuated by the anti-inflammatory compound palmitoylethanolamide (PEA). METHODS DETA/NO was administered to isolated rat trigeminal SGCs in vitro, and injected into the rat trigeminal ganglion in vivo, in the presence or absence of PEA. RESULTS Administration of DETA/NO (1000 µM) increased the release of prostaglandin E2 by SGCs. PEA (1 and 10 µM) significantly attenuated prostaglandin E2 release. Two intraganglionic injections of DETA/NO (10 mM, 3 µl) or prostaglandin E2 at a 30-minute interval did not evoke discharge in trigeminal ganglion neurons that innervate the rat jaw-closer muscles, but did reduce the mechanical activation threshold of their peripheral endings by 30%-50%. Intravenous administration of PEA (1 mg/kg) or ketorolac (0.5 mg/kg) prevented DETA/NO-induced afferent mechanical sensitization. CONCLUSIONS Elevation of NO in the trigeminal ganglion results in the sensitization of the peripheral endings of masticatory muscle nociceptors to mechanical stimulation through a mechanism that involves prostaglandin E2 release from SGCs. Attenuation of this sensitization by PEA suggests a possible option for acute management of craniofacial pain and headache.
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Affiliation(s)
- Brian E Cairns
- Center for Sensory-Motor Interaction, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark Faculty of Pharmaceutical Sciences, The University of British Columbia, Canada
| | - Jens C Laursen
- Center for Sensory-Motor Interaction, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
| | - Xu-Dong Dong
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Canada College of Stomatology, Tianjin Medical University, PR China
| | - Parisa Gazerani
- Center for Sensory-Motor Interaction, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
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139
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Nishida K, Doi T, Inoue H. The role of nitric oxide in arthritic joints: a therapeutic target? Mod Rheumatol 2014; 10:63-7. [DOI: 10.3109/s101650050001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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140
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Kim SF. The Nitric Oxide-Mediated Regulation of Prostaglandin Signaling in Medicine. VITAMINS & HORMONES 2014; 96:211-45. [DOI: 10.1016/b978-0-12-800254-4.00009-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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141
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Crowley SD. The cooperative roles of inflammation and oxidative stress in the pathogenesis of hypertension. Antioxid Redox Signal 2014; 20:102-20. [PMID: 23472597 PMCID: PMC3880899 DOI: 10.1089/ars.2013.5258] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
SIGNIFICANCE Innate and adaptive immunity play fundamental roles in the development of hypertension and its complications. As effectors of the cell-mediated immune response, myeloid cells and T lymphocytes protect the host organism from infection by attacking foreign intruders with bursts of reactive oxygen species (ROS). RECENT ADVANCES While these ROS may help to preserve the vascular tone and thereby protect against circulatory collapse in the face of overwhelming infection, aberrant elaboration of ROS triggered by immune cells in the absence of a hemodynamic insult can lead to pathologic increases in blood pressure. Conversely, misdirected oxidative stress in cardiovascular control organs, including the vasculature, the kidney, and the nervous system potentiates inflammatory responses, augmenting blood pressure elevation and inciting target organ damage. CRITICAL ISSUES Inflammation and oxidative stress thereby act as cooperative and synergistic partners in the pathogenesis of hypertension. FUTURE DIRECTIONS Pharmacologic interventions for hypertensive patients will need to exploit this robust bidirectional relationship between ROS generation and immune activation in cardiovascular control organs to maximize therapeutic benefit, while limiting off-target side effects.
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Affiliation(s)
- Steven D Crowley
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers , Durham, North Carolina
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142
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The protective role of MnTBAP in oxidant-mediated injury and inflammation in a rat model of lung contusion. Surgery 2013; 154:980-90. [PMID: 24139490 DOI: 10.1016/j.surg.2013.05.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 05/10/2013] [Indexed: 12/21/2022]
Abstract
BACKGROUND Lung contusion (LC) is a unique direct and focal insult that is considered a major risk factor for the initiation of acute lung injury and acute respiratory distress syndrome. We have shown recently that consumption of nitric oxide (due to excess superoxide) resulting in peroxynitrite formation leads to decreased vascular reactivity after LC. In this study, we set out to determine whether the superoxide scavenger Mn (III) tetrakis (4-benzoic acid) porphyrin chloride (MnTBAP) plays a protective role in alleviating acute inflammatory response and injury in LC. METHODS Nonlethal, closed-chest, bilateral LC was induced in a rodent model. Administration of the superoxide dismutase mimetic MnTBAP concurrently in LC in rats was performed, and bronchoalveolar lavage (BAL) and lung samples were analyzed for degree of injury and inflammation at 5 and 24 h after the insult. The extent of injury was assessed by the measurement of cells and albumin with cytokine levels in the BAL and lungs. Lung samples were subjected to H&E and superoxide staining with dihydro-ethidium. Protein-bound dityrosine and nitrotyrosine levels were quantified in lung tissue by tandem mass spectrometry. RESULTS The degrees of lung injury after LC as determined by BAL albumin levels were significantly decreased in the MnTBAP-administered rats at all the time points when compared to the corresponding controls. The release of proinflammatory cytokines and BAL neutrophils was significantly less in the rats administered MnTBAP after LC. Administration of MnTBAP decreased tissue damage and decreased necrosis and neutrophil-rich exudate at the 24-h time point. Staining for superoxide anions showed significantly greater intensity in the lung samples from the LC group compared to the LC+ MnTBAP group. High-performance liquid chromatography/tandem mass spectrometry revealed that MnTBAP treatment significantly attenuated dityrosine and nitrotyrosine levels, consistent with decreased oxidant injury. CONCLUSION Superoxide dismutase mimetic-MnTBAP reduced permeability and oxidative injury in LC and may have a therapeutic role in diminishing inflammation in LC.
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143
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Dietary supplementation with L-arginine between days 14 and 25 of gestation enhances embryonic development and survival in gilts. Amino Acids 2013; 46:375-84. [PMID: 24337831 DOI: 10.1007/s00726-013-1626-6] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 11/19/2013] [Indexed: 12/31/2022]
Abstract
Embryonic loss is a major problem in mammals, but there are few effective ways to prevent it. Using a porcine model, we determined effects of dietary L-arginine supplementation between days 14 and 25 of gestation on embryonic growth and survival. Gilts were checked daily for estrus with boars in the morning and bred at onset of the second estrus and 12 h later (the time of breeding = day 0 of gestation). Between days 14 and 25 of gestation, 15 gilts/treatment were housed individually and fed twice daily 1 kg of a corn- and soybean meal-based diet supplemented with 0.0, 0.4, or 0.8 % L-arginine. All diets were made isonitrogenous by addition of L-alanine. On day 25 of gestation, gilts were hysterectomized to obtain conceptuses. Compared with controls, dietary supplementation with 0.4 or 0.8 % L-arginine increased (P ≤ 0.05) arginine concentrations in maternal plasma, total volume of amniotic fluid; total amounts of arginine in allantoic and amniotic fluids; total amounts of fructose and most amino acids in amniotic fluid; placental growth; and the number of viable fetuses per litter by 2. The numbers of total fetuses, fetal weight, corpora lutea, volume of allantoic fluid, maternal circulating levels of progesterone and estrogen, or total amounts of hormones in allantoic fluid did not differ among the three treatment groups. Reproductive performance of gilts did not differ between the 0.4 and 0.8 % L-arginine groups. Thus, dietary supplementation with 0.4 or 0.8 % L-arginine between days 14 and 25 of gestation enhances embryonic/fetal survival in swine.
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144
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Ikuta T, Kuroyanagi Y, Odo N, Liu S. A common signaling pathway is activated in erythroid cells expressing high levels of fetal hemoglobin: a potential role for cAMP-elevating agents in β-globin disorders. J Blood Med 2013; 4:149-59. [PMID: 24353450 PMCID: PMC3862583 DOI: 10.2147/jbm.s54671] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Background Although erythroid cells prepared from fetal liver, cord blood, or blood from β-thalassemia patients are known to express fetal hemoglobin at high levels, the underlying mechanisms remain elusive. We previously showed that cyclic nucleotides such as cAMP and cGMP induce fetal hemoglobin expression in primary erythroid cells. Here we report that cAMP signaling contributes to high-level fetal hemoglobin expression in erythroid cells prepared from cord blood and β-thalassemia. Methods The status of the cAMP signaling pathway was investigated using primary erythroid cells prepared from cord blood and the mononuclear cells of patients with β-thalassemia; erythroid cells from adult bone marrow mononuclear cells served as the control. Results We found that intracellular cAMP levels were higher in erythroid cells from cord blood and β-thalassemia than from adult bone marrow. Protein kinase A activity levels and cAMP-response element binding protein phosphorylation were higher in erythroid cells from cord blood or β-thalassemia than in adult bone marrow progenitors. Mitogen-activated protein kinase pathways, which play a role in fetal hemoglobin expression, were not consistently activated in cord blood or β-thalassemia erythroid cells. When cAMP signaling was activated in adult erythroid cells, fetal hemoglobin was induced at high levels and associated with reduced expression of BCL11A, a silencer of the β-globin gene. Conclusion These results suggest that activated cAMP signaling may be a common mechanism among erythroid cells with high fetal hemoglobin levels, in part because of downregulation of BCL11A. Activation of the cAMP signaling pathway with cAMP-elevating agents may prove to be an important signaling mechanism to reactivate fetal hemoglobin expression in erythroid cells.
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Affiliation(s)
- Tohru Ikuta
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, GA, USA
| | - Yuichi Kuroyanagi
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, GA, USA
| | - Nadine Odo
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, GA, USA
| | - Siyang Liu
- Department of Physiology, Medical College of Georgia, Georgia Regents University, Augusta, GA, USA
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Kim EJ, Bu SY, Sung MK, Kang MH, Choi MK. Analysis of antioxidant and anti-inflammatory activity of silicon in murine macrophages. Biol Trace Elem Res 2013; 156:329-37. [PMID: 24092518 DOI: 10.1007/s12011-013-9829-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 09/16/2013] [Indexed: 01/04/2023]
Abstract
The purpose of this study is to investigate the antioxidant and anti-inflammatory properties of silicon (Si) in the RAW 264.7 murine macrophage cell line. Lipopolysaccharide (LPS) was used to induce inflammatory conditions, and cells were treated with 0, 1, 5, 10, 25, 50, and 100 μM Si in the form of sodium metasilicate. Tert-butylhydroquinone (TBHQ), a well-known antioxidative substance, was used as a positive control to assess the degree of antioxidative and anti-inflammatory properties of Si. Sodium metasilicate at 100 μM suppressed LPS-induced nitric oxide generation from macrophages 36 h after treatment. In addition, 50 μM sodium metasilicate decreased interleukin-6 production, and the degree of suppression was comparable to that of 10 μM TBHQ treatment. LPS-induced messenger RNA (mRNA) expression of tumor necrosis factor-α and inducible nitric oxide synthase was significantly decreased by 1, 5, 10, and 50 μM sodium metasilicate. Cyclooxygenase-2 mRNA expression was also suppressed by 1, 5, 25, and 50 μM sodium metasilicate. Based on these data, Si has the ability to suppress the production of inflammatory cytokines and mediators, possibly through the suppression of radical scavenger activity and down-regulation of gene expression of inflammatory mediators.
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Affiliation(s)
- Eun-Jin Kim
- Division of Food Science, Kongju National University, Yesan, 340-702, South Korea
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146
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Orellana JA, Montero TD, von Bernhardi R. Astrocytes inhibit nitric oxide-dependent Ca(2+) dynamics in activated microglia: involvement of ATP released via pannexin 1 channels. Glia 2013; 61:2023-37. [PMID: 24123492 DOI: 10.1002/glia.22573] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 08/13/2013] [Accepted: 08/19/2013] [Indexed: 01/22/2023]
Abstract
Under inflammatory conditions, microglia exhibit increased levels of free intracellular Ca(2+) and produce high amounts of nitric oxide (NO). However, whether NO, Ca(2+) dynamics, and gliotransmitter release are reciprocally modulated is not fully understood. More importantly, the effect of astrocytes in the potentiation or suppression of such signaling is unknown. Our aim was to address if astrocytes could regulate NO-dependent Ca(2+) dynamics and ATP release in LPS-stimulated microglia. Griess assays and Fura-2AM time-lapse fluorescence images of microglia revealed that LPS produced an increased basal [Ca(2+) ]i that depended on the sequential activation of iNOS, COXs, and EP1 receptor. TGFβ1 released by astrocytes inhibited the abovementioned responses and also abolished LPS-induced ATP release by microglia. Luciferin/luciferase assays and dye uptake experiments showed that release of ATP from LPS-stimulated microglia occurred via pannexin 1 (Panx1) channels, but not connexin 43 hemichannels. Moreover, in LPS-stimulated microglia, exogenous ATP triggered activation of purinergic P2Y1 receptors resulting in Ca(2+) release from intracellular stores. Interestingly, TGFβ1 released by astrocytes inhibited ATP-induced Ca(2+) response in LPS-stimulated microglia to that observed in control microglia. Finally, COX/EP1 receptor signaling and activation of P2 receptors via ATP released through Panx1 channels were critical for the increased NO production in LPS-stimulated microglia. Thus, Ca(2+) dynamics depended on the inflammatory profile of microglia and could be modulated by astrocytes. The understanding of mechanisms underlying glial cell regulatory crosstalk could contribute to the development of new treatments to reduce inflammatory cytotoxicity in several brain pathologies.
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Affiliation(s)
- Juan A Orellana
- Departamento de Neurología; Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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147
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Lee JT, Ko K, Lee KJ, Lim MU, Moussavou G, Kim JS, Chang KT, Choo YK. Effect of gangliosides on LPS stimulation and nitric oxide release in porcine kidney cell line PK15. Anim Cells Syst (Seoul) 2013. [DOI: 10.1080/19768354.2013.839957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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148
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Evaluation of the anti-inflammatory activity of riparin II (O-methil-N-2-hidroxi-benzoyl tyramine) in animal models. Chem Biol Interact 2013; 205:165-72. [DOI: 10.1016/j.cbi.2013.07.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Revised: 06/09/2013] [Accepted: 07/10/2013] [Indexed: 01/22/2023]
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149
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Tanigawa T, Odkhuu E, Morikawa A, Hayashi K, Sato T, Shibata R, Goto F, Ueda H, Yokochi T. Immunological role of prostaglandin E2 production in mouse auditory cells in response to LPS. Innate Immun 2013; 20:639-46. [PMID: 24055878 DOI: 10.1177/1753425913503578] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 06/30/2013] [Indexed: 01/22/2023] Open
Abstract
The effect of LPS on the production of prostaglandin E2 (PGE2) in mouse HEI-OC1 auditory cells was examined. HEI-OC1 auditory cells constitutively produce a small amount of PGE2. LPS augmented the PGE2 production via enhanced cyclooxygenase 2 (COX2) expression. LPS-induced augmentation of COX2 expression was dependent on up-regulation of COX2 mRNA expression. LPS induced the production of TNF-α, but not IL-1β· An anti-TNF-α neutralizing Ab significantly inhibited PGE2 production and COX2 mRNA expression in response to LPS. LPS-induced PGE2 production was prevented by a series of pharmacological signaling inhibitors to NF-κB and MAPKs. Pam3CSK4 as a TLR2 ligand, as well as LPS as a TLR4 ligand, augmented the PGE2 production. However, poly I:C as a TLR3 ligand, imiquimod as a TLR7 ligand and CpG DNA as a TLR9 ligand did not augment it. HEI-OC1 cells expressed TLR2, TLR4 and TLR9, but not TLR3 or TLR7. The putative role of LPS-induced PGE2 production in auditory cells is discussed.
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Affiliation(s)
- Tohru Tanigawa
- Department of Otolaryngology, Aichi Medical University School of Medicine, Aichi, Japan
| | - Erdenezaya Odkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Aichi, Japan
| | - Akiko Morikawa
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Aichi, Japan
| | | | - Takashi Sato
- Department of Otolaryngology, Aichi Gakuin University, Aichi, Japan
| | - Rei Shibata
- Department of Cardiology, Graduate School of Medical Sciences, Nagoya University, Aichi, Japan
| | - Fumiyuki Goto
- Department of Otolaryngology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Hiromi Ueda
- Department of Otolaryngology, Aichi Medical University School of Medicine, Aichi, Japan
| | - Takashi Yokochi
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Aichi, Japan
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Anticancer and immunostimulatory role of encapsulated tumor antigen containing cobalt oxide nanoparticles. J Biol Inorg Chem 2013; 18:957-73. [DOI: 10.1007/s00775-013-1044-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 08/30/2013] [Indexed: 01/22/2023]
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