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Feng M, Wang D, Wang X, Yang Y, Zhang S. Bai-Hu-Tang regulates endothelin-1 and its signalling pathway in vascular endothelial cells. JOURNAL OF ETHNOPHARMACOLOGY 2022; 284:114812. [PMID: 34752899 DOI: 10.1016/j.jep.2021.114812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/02/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Bai-Hu-Tang (BHT) is traditionally used to treat human and animal fever syndrome with four symptoms: large and vigorous pulse, large thirst, high sweat, and high heat. AIM OF THE STUDY To investigate the mechanism of vasodilation regulation of Bai-Hu-Tang in primary vascular endothelial cells stimulated by lipopolysaccharide (LPS). MATERIALS AND METHODS A hydrophilic concentrate of BHT was prepared, and the main components of mangiferin and timosaponin BⅡ were determined by HLPC analysis. The rabbit fever model was constructed by intravenous injection of LPS (15 μg/kg body weight), and BHT was gavaged to treat febrile rabbits. After treatment for 6 h, animal peripheral blood was collected, and serum was isolated for endothelin-1 (ET-1) and nitric oxide (NO) assays. Rabbit vascular endothelial cells (RVECs) were isolated and stimulated with 1 μg/mL LPS, and then inflammatory cells were treated with 125 or 250 μg/mL BHT for 24 h. The supernatant cytokines TNF-ɑ, IL-1β, IL-6, and ET-1 were detected by ELISA kits. Gene expression levels of endothelin receptor type B (ETB receptor) were analysed by real-time polymerase chain reaction (RT-PCR), and protein expression levels of PI3K and Akt were detected by Western blot. A nitrite assay was used to measure intracellular nitric oxide (NO) production, and nitric oxide synthase (NOS) was measured by the T-NOS colorimetric method. RESULTS Animal experiments demonstrated that BHT significantly restored ET-1 and NO in animal peripheral blood, which were disordered in LPS-induced fever rabbits. Moreover, a cytotoxicity assay demonstrated that BHT ≤700 μg/mL is innoxious to RVECs. BHT significantly repressed cellular TNF-α, IL-1β, and ET-1, which were originally elevated by LPS in RVECs. Meanwhile, BHT elevated the gene expression level of the ETB receptor and promoted NOS and NO production in RVECs induced by LPS. CONCLUSION BHT can inhibit excessive ET-1 secretion induced by LPS in vascular endothelial cells and activate the classic ET-1 signalling pathway to promote NO production, which may facilitate vasodilation of smooth muscle cells.
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Affiliation(s)
- Min Feng
- Engineering Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Institute of Animal Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China; College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Dongsheng Wang
- Engineering Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Institute of Animal Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - Xurong Wang
- Engineering Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Institute of Animal Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - Ying Yang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Shidong Zhang
- Engineering Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Institute of Animal Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China.
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Bong JH, Park JH, Sung JS, Lee CK, Lee GY, Kang MJ, Kim HO, Pyun JC. Rapid Analysis of Bacterial Contamination in Platelets without Pre-Enrichment Using Pig Serum-Derived Antibodies. ACS APPLIED BIO MATERIALS 2021; 4:7779-7789. [DOI: 10.1021/acsabm.1c00538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ji-Hong Bong
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Jun-Hee Park
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Jeong Soo Sung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Chang Kyu Lee
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Ga-Yeon Lee
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Hyun Ok Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
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Fluorescence immunoassay of E. coli using anti-lipopolysaccharide antibodies isolated from human serum. Biosens Bioelectron 2019; 126:518-528. [DOI: 10.1016/j.bios.2018.10.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 10/07/2018] [Accepted: 10/17/2018] [Indexed: 12/21/2022]
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Zhang S, Wang D, Dong S, Yang Z, Yan Z. iTRAQ-based quantitative proteomic analysis reveals Bai-Hu-Tang enhances phagocytosis and cross-presentation against LPS fever in rabbit. JOURNAL OF ETHNOPHARMACOLOGY 2017; 207:1-7. [PMID: 28552634 DOI: 10.1016/j.jep.2017.05.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 05/11/2017] [Accepted: 05/14/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Bai-Hu-Tang (BHT), a classical anti-febrile Chinese formula comprising of liquorice, anemarrhena rhizome, gypsum and rice, has been traditionally used to anti-febrile treatment and promote the production of body fluid to relieve thirst. In this paper, we aim to explore anti-febrile mechanism of BHT at protein level through analyzing alteration of differentially expressed proteins (DEPs) both lipopolysaccharide (LPS) fever syndrome and that was treated with BHT in rabbits. MATERIALS AND METHODS Febrile model was induced by LPS injection (i.v.) in rabbits, and BHT (750mg dry extract/kg body weight) was gavaged to another group of LPS fever rabbits. After sacrifice of animals, total protein of liver tissue was isolated, and two-dimensional liquid chromatography (LC) - tandem mass spectrometry (MS) coupled with isobaric tags for relative and absolute quantification (iTRAQ) labeling analysis was employed to quantitatively identify differentially expressed proteins in two group animals, which were compared with control group. Then bioinformatic analysis of DEPs was conducted through hierarchical Clustering, Venn analysis, gene ontology (GO) annotation enrichment, and kyoto encyclopedia of genes and genomes (KEGG) pathways enrichment. RESULT The results demonstrated there were 63 and 109 DEPs in LPS fever group and BHT-treated group, respectively. Enrichment analysis of GO annotations indicated that BHT mainly regulated expression of some extracellular structural proteins for response to stimulus and stress. KEGG analysis showed that ribosome and phagosome were the most significant pathways. Thereinto, several proteins in phagosome pathway were significantly up-regulated by BHT, including F-actin, coronin, Rac, and major histocompatibility complex class I (MHC I), which work in phagocytosis and cross-presentation CONCLUSION: BHT may contribute to pyrogen clearance by boosting antigenic phagocytosis, degradation, and cross presentation in the liver.
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Affiliation(s)
- Shidong Zhang
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; Key Laboratory of Veterinary Pharmaceutics Discovery, Ministry of Agriculture, Lanzhou 730050, China.
| | - Dongsheng Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; Key Laboratory of Veterinary Pharmaceutics Discovery, Ministry of Agriculture, Lanzhou 730050, China.
| | - Shuwei Dong
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou 730050, China.
| | - Zhiqiang Yang
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; Key Laboratory of Veterinary Pharmaceutics Discovery, Ministry of Agriculture, Lanzhou 730050, China; Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou 730050, China.
| | - Zuoting Yan
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou 730050, China.
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Corticotropin-releasing factor in the locus coeruleus as a modulator of ventilation in rats. Respir Physiol Neurobiol 2016; 233:73-80. [DOI: 10.1016/j.resp.2016.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/07/2016] [Accepted: 08/16/2016] [Indexed: 12/22/2022]
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Carvalho-Costa PG, Branco LGS, Leite-Panissi CRA. Activation of locus coeruleus heme oxygenase-carbon monoxide pathway promoted an anxiolytic-like effect in rats. ACTA ACUST UNITED AC 2016; 49:e5135. [PMID: 27074170 PMCID: PMC4830028 DOI: 10.1590/1414-431x20165135] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 01/27/2016] [Indexed: 11/22/2022]
Abstract
The heme oxygenase-carbon monoxide pathway has been shown to play an important role
in many physiological processes and is capable of altering nociception modulation in
the nervous system by stimulating soluble guanylate cyclase (sGC). In the central
nervous system, the locus coeruleus (LC) is known to be a region that expresses the
heme oxygenase enzyme (HO), which catalyzes the metabolism of heme to carbon monoxide
(CO). Additionally, several lines of evidence have suggested that the LC can be
involved in the modulation of emotional states such as fear and anxiety. The purpose
of this investigation was to evaluate the activation of the heme oxygenase-carbon
monoxide pathway in the LC in the modulation of anxiety by using the elevated plus
maze test (EPM) and light-dark box test (LDB) in rats. Experiments were performed on
adult male Wistar rats weighing 250-300 g (n=182). The results showed that the
intra-LC microinjection of heme-lysinate (600 nmol), a substrate for the enzyme HO,
increased the number of entries into the open arms and the percentage of time spent
in open arms in the elevated plus maze test, indicating a decrease in anxiety.
Additionally, in the LDB test, intra-LC administration of heme-lysinate promoted an
increase on time spent in the light compartment of the box. The
intracerebroventricular microinjection of guanylate cyclase, an sGC inhibitor
followed by the intra-LC microinjection of the heme-lysinate blocked the
anxiolytic-like reaction on the EPM test and LDB test. It can therefore be concluded
that CO in the LC produced by the HO pathway and acting via cGMP plays an
anxiolytic-like role in the LC of rats.
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Affiliation(s)
- P G Carvalho-Costa
- Programa de Pós-Graduação em Psicobiologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - L G S Branco
- Departamento de Morfologia, Fisiologia e Patologia Básica, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - C R A Leite-Panissi
- Programa de Pós-Graduação em Psicobiologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Branco LG, Soriano RN, Steiner AA. Gaseous Mediators in Temperature Regulation. Compr Physiol 2014; 4:1301-38. [DOI: 10.1002/cphy.c130053] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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The Janus face of the heme oxygenase/biliverdin reductase system in Alzheimer disease: it's time for reconciliation. Neurobiol Dis 2013; 62:144-59. [PMID: 24095978 DOI: 10.1016/j.nbd.2013.09.018] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 09/24/2013] [Indexed: 12/23/2022] Open
Abstract
Alzheimer disease (AD) is the most common form of dementia among the elderly and is characterized by progressive loss of memory and cognition. These clinical features are due in part to the increase of reactive oxygen and nitrogen species that mediate neurotoxic effects. The up-regulation of the heme oxygenase-1/biliverdin reductase-A (HO-1/BVR-A) system is one of the earlier events in the adaptive response to stress. HO-1/BVR-A reduces the intracellular levels of pro-oxidant heme and generates equimolar amounts of the free radical scavengers biliverdin-IX alpha (BV)/bilirubin-IX alpha (BR) as well as the pleiotropic gaseous neuromodulator carbon monoxide (CO) and ferrous iron. Two main and opposite hypotheses for a role of the HO-1/BVR-A system in AD propose that this system mediates neurotoxic and neuroprotective effects, respectively. This apparent controversy was mainly due to the fact that for over about 20years HO-1 was the only player on which all the analyses were focused, excluding the other important and essential component of the entire system, BVR. Following studies from the Butterfield laboratory that reported alterations in BVR activity along with decreased phosphorylation and increased oxidative/nitrosative post-translational modifications in the brain of subjects with AD and amnestic mild cognitive impairment (MCI) subjects, a debate was opened on the real pathophysiological and clinical significance of BVR-A. In this paper we provide a review of the main discoveries about the HO/BVR system in AD and MCI, and propose a mechanism that reconciles these two hypotheses noted above of neurotoxic and the neuroprotective aspects of this important stress responsive system.
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Biancardi V, Bícego KC, Gargaglioni LH. ATP in the locus coeruleus as a modulator of cardiorespiratory control in unanaesthetized male rats. Exp Physiol 2013; 99:232-47. [PMID: 24058188 DOI: 10.1113/expphysiol.2013.074195] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Locus coeruleus (LC) noradrenergic neurons are chemosensitive to CO2 and pH in mammals and amphibians and are involved in the CO2-related drive to breathe. Purinergic neuromodulation in the LC is of particular interest because ATP acts as a neuromodulator in brainstem regions involved in cardiovascular and respiratory regulation, such as the LC. ATP acting on LC P2 receptors influences the release of noradrenaline. Thus, the goal of the present study was to investigate the role of LC purinergic neuromodulation of ventilatory and cardiovascular responses in normocapnic and hypercapnic conditions in unanaesthetized male Wistar rats. We assessed the purinergic modulation of cardiorespiratory systems by microinjecting an ATP P2X receptor agonist [α,β-methylene ATP (α,β-meATP), 0.5 or 1 nmol in 40 nl] and two non-selective P2 receptor antagonists [pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid (PPADS), 0.5 or 1 nmol in 40 nl; and suramin, 1 nmol in 40 nl] into the LC. Pulmonary ventilation (measured by plethysmography), mean arterial pressure (MAP) and heart rate (HR) were determined before and after unilateral microinjection (40 nl) of α,β-meATP, PPADS, suramin or 0.9% saline (vehicle) into the LC. These measurements were made during a 60 min exposure to normocapnic conditions or a 30 min exposure to 7% CO2. Subsequently, animals undergoing pharmacological treatment were subjected to a 30 min exposure to normocapnic conditions as a recovery period. In normocapnic conditions, α,β-meATP did not affect any parameter, whereas PPADS decreased respiratory frequency and increased MAP and HR. Suramin increased MAP and HR but did not change ventilation. Moreover, hypercapnic conditions induced an increase in ventilation and a decrease in HR in all groups. In hypercapnic conditions, α,β-meATP increased ventilation but did not change cardiovascular parameters, whereas PPADS increased MAP but did not alter ventilation, and suramin increased both ventilation and MAP. Thus, our data suggest that purinergic signalling, specifically through P2 receptors, in the LC plays an important role in cardiorespiratory control in normocapnic and hypercapnic conditions in unanaesthetized rats.
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Affiliation(s)
- Vivian Biancardi
- L. H. Gargaglioni: Department of Animal Morphology and Physiology, Faculty of Agricultural Sciences and Veterinaria, São Paulo State University at Jaboticabal, Rod. Prof. Paulo Donato Castellane s/n, 14884-900 Jaboticabal, SP, Brazil.
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Zhang S, Wang D, Wang X, Li S, Li J, Li H, Yan Z. Aqueous extract of Bai-Hu-Tang, a classical Chinese herb formula, prevents excessive immune response and liver injury induced by LPS in rabbits. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:321-7. [PMID: 23827759 PMCID: PMC7127582 DOI: 10.1016/j.jep.2013.06.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 05/10/2013] [Accepted: 06/24/2013] [Indexed: 05/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Bai-Hu-Tang (BHT) was traditionally used to reduce fever heat and promote generation of body fluids. AIM OF THE STUDY To investigate the effect and mechanism of BHT in the prevention of lipopolysaccharide (LPS) fever in manners of immune modulation. MATERIALS AND METHODS The model of fever syndrome of Chinese medicine pattern was imitated by LPS injection i.v. in rabbits, and BHT was gavaged. The serum levels of tumor necrosis factor-α (TNF-α), interleukin (IL-6, 10) and immunoglobulin (IgG, IgA, and IgM) were determined by enzyme-linked immunosorbent assay (ELISA); alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were tested by biochemical methods. Liver tissue damage was detected by hematoxylin-eosin (H&E) stain. Subpopulation of T cells was detected by Fluorescence Activated Cell Sorter (FACS). Genes expression of Toll-like receptor 4 (TLR4) and lipopolysaccharide binding protein (LBP) in liver tissue were assayed by real-time polymerase chain reaction (RT-PCR). RESULT The results demonstrated that BHT prevented sudden increase of IL-10, TNF-α, ALT and AST, and liver damage induced by LPS. BHT also prevented significant decrease of the percentage of CD(8+) T cells since LPS injection. At the same time, BHT did not affect the gene expression of TLR4 and serum concentration of three immunoglobulins, which were increased by LPS, but made gene expression of LBP higher. CONCLUSION The results of this study indicated that BHT played an important role in immunity protection and anti-injury through preventing immunoinflammatory damage by LPS. The achievement thereby scientifically provided mechanism of BHT in the prevention of febrile disease, and supported its traditional use.
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Affiliation(s)
- Shidong Zhang
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
- Key Laboratory of Veterinary Pharmaceutics Discovery, Ministry of Agriculture, Lanzhou, China
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China
- Research Center of Clinical Veterinary Medicine, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Dongsheng Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
- Key Laboratory of Veterinary Pharmaceutics Discovery, Ministry of Agriculture, Lanzhou, China
| | - Xurong Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China
| | - Shihong Li
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
- Research Center of Clinical Veterinary Medicine, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jingyu Li
- Key Laboratory of Veterinary Pharmaceutics Discovery, Ministry of Agriculture, Lanzhou, China
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China
| | - Hongsheng Li
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China
- Research Center of Clinical Veterinary Medicine, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Zuoting Yan
- Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
- Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China
- Corresponding author at: Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China. Tel.: +86 931 2115261; fax: +86 931 2115191.
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Soriano R, Kwiatkoski M, Batalhao M, Branco L, Carnio E. Interaction between the carbon monoxide and nitric oxide pathways in the locus coeruleus during fever. Neuroscience 2012; 206:69-80. [DOI: 10.1016/j.neuroscience.2012.01.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 12/06/2011] [Accepted: 01/07/2012] [Indexed: 10/14/2022]
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Involvement of the heme oxygenase-carbon monoxide-cGMP pathway in the nociception induced by acute painful stimulus in rats. Brain Res 2011; 1385:107-13. [PMID: 21349250 DOI: 10.1016/j.brainres.2011.02.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Revised: 01/28/2011] [Accepted: 02/14/2011] [Indexed: 11/23/2022]
Abstract
Heme oxygenase-carbon monoxide-cGMP (HO-CO-cGMP) pathway has been reported to be involved in peripheral and spinal modulation of inflammatory pain. However, the involvement of this pathway in the modulation of acute painful stimulus in the absence of inflammation remains unknown. Thus, we evaluated the involvement of the HO-CO-cGMP pathway in nociception by means the of analgesia index (AI) in the tail flick test. Rats underwent surgery for implantation of unilateral guide cannula directed toward the lateral ventricle and after the recovery period (5-7 days) were subjected to the measures of baseline tail flick test. Animals were divided into groups to assess the effect of intracerebroventricular administration (i.c.v.) of the following compounds: ZnDPBG (HO inhibitor) or vehicle (Na(2)CO(3)), heme-lysinate (substrate overload) or vehicle (l-lysine), or the selective inhibitor of soluble guanilate cyclase ODQ or vehicle (DMSO 1%) following the administration of heme-lysinate or vehicle. Heme overload increased AI, indicating an antinociceptive role of the pathway. This response was attenuated by i.c.v. pretreatment with the HO inhibitor ZnDPBG. In addition, this effect was dependent on cGMP activity, since the pretreatment with ODQ blocked the increase in the AI. Because CO produces most of its actions via cGMP, these data strongly imply that CO is the HO product involved in the antinociceptive response. This modulation seems to be phasic rather than tonic, since i.c.v. treatment with ZnDPBG or ODQ did not alter the AI. Therefore, we provide evidence consistent with the notion that HO-CO-cGMP pathway plays a key phasic antinociceptive role modulating noninflammatory acute pain.
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Oliveira-Pelegrin GR, Branco LGS, Rocha MJA. Central NO-cGMP pathway in thermoregulation and survival rate during polymicrobial sepsis. Can J Physiol Pharmacol 2010; 88:113-20. [PMID: 20237585 DOI: 10.1139/y09-116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sepsis induces production of inflammatory mediators such as nitric oxide (NO) and causes physiological alterations, including changes in body temperature (Tb). We evaluated the involvement of the central NO-cGMP pathway in thermoregulation during sepsis induced by cecal ligation and puncture (CLP), and analyzed its effect on survival rate. Male Wistar rats with a Tb probe inserted in their abdomen were intracerebroventricularly injected with 1 microL NG-nitro-L-arginine methyl ester (L-NAME, 250 microg), a nonselective NO synthase (NOS) inhibitor; or aminoguanidine (250 microg), an inducible NOS inhibitor; or 1H-[1,2,4]oxadiazolo[4,3,-a]quinoxalin-1-one (ODQ, 0.25 microg), a guanylate cyclase inhibitor. Thirty minutes after injection, sepsis was induced by cecal ligation and puncture (CLP), or the rats were sham operated. The animals were divided into 2 groups for determination of Tb for 24 h and assessment of survival during 3 days. The drop in Tb seen in the CLP group was attenuated by pretreatment with the NOS inhibitors (p < 0.05) and blocked with ODQ. CLP rats pretreated with either of the inhibitors showed higher survival rates than vehicle injected groups (p < 0.05), and were even higher in the ODQ pretreated group. Our results showed that the effect of NOS inhibition on the hypothermic response to CLP is consistent with the role of nitrergic pathways in thermoregulation.
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Affiliation(s)
- G R Oliveira-Pelegrin
- Biociências Aplicadas à Farmácia, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-904, Brasil
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Soriano RN, Ravanelli MI, Batalhao ME, Carnio EC, Branco LGS. Propyretic role of the locus coeruleus nitric oxide pathway. Exp Physiol 2010; 95:669-77. [PMID: 20176679 DOI: 10.1113/expphysiol.2009.051490] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Nitric oxide has been reported to modulate fever in the brain. However, the sites where NO exerts this modulation remain somewhat unclear. Locus coeruleus (LC) neurons express not only nitric oxide synthase (NOS) but also soluble guanylyl cyclase (sGC). In the present study, we evaluated in vivo and ex vivo the putative role of the LC NO-cGMP pathway in fever. To this end, deep body temperature was measured before and after pharmacological modulations of the pathway. Moreover, nitrite/nitrate (NOx) and cGMP levels in the LC were assessed. Conscious rats were microinjected within the LC with a non-selective NOS inhibitor (N(G)-monomethyl-l-arginine acetate), a NO donor (NOC12), a sGC inhibitor (1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one) or a cGMP analogue (8-bromo-cGMP) and injected intraperitoneally with endotoxin. Inhibition of NOS or sGC before endotoxin injection significantly increased the latency to the onset of fever. During the course of fever, inhibition of NOS or sGC attenuated the febrile response, whereas microinjection of NOC12 or 8-bromo-cGMP increased the response. These findings indicate that the LC NO-cGMP pathway plays a propyretic role. Furthermore, we observed a significant increase in NOx and cGMP levels, indicating that the febrile response to endotoxin is accompanied by stimulation of the NO-cGMP pathway in the LC.
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Affiliation(s)
- Renato N Soriano
- Departamento de Fisiologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, 14049-900 - Ribeirão Preto, SP, Brazil.
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Role of preoptic opioid receptors in the body temperature reduction during hypoxia. Brain Res 2009; 1286:66-74. [DOI: 10.1016/j.brainres.2009.06.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 06/10/2009] [Accepted: 06/13/2009] [Indexed: 11/16/2022]
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Role of locus coeruleus heme oxygenase-carbon monoxide-cGMP pathway during hypothermic response to restraint. Brain Res Bull 2007; 75:526-32. [PMID: 18355628 DOI: 10.1016/j.brainresbull.2007.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Revised: 08/16/2007] [Accepted: 09/07/2007] [Indexed: 02/02/2023]
Abstract
Central heme oxigenase-carbon monoxide (HO-CO) pathway has been shown to play a pyretic role in the thermoregulatory response to restraint. However, the specific site in the central nervous system where CO may act modulating this response remains unclear. LC is rich not only in sGC but also in heme oxygenase (HO; the enzyme that catalyses the metabolism of heme to CO, along with biliverdin and free iron). Therefore, the possible role of the HO-CO-cGMP pathway in the restraint-induced-hypothermia by LC neurons was investigated. Body temperature dropped about 0.7 degrees C during restraint. ZnDPBG (a HO inhibitor; 5 nmol, intra-LC) prevented the hypothermic response during restraint. Conversely, induction of the HO pathway in the LC with heme-lysinate (7.6 nmol, intra-LC) intensified the hypothermic response to restraint, and this effect was prevented by pretreatment with ODQ (a sGC inhibitor; given intracerebroventricularly, 1.3 nmol). Taken together, these data suggest that CO in the LC produced by the HO pathway and acting via cGMP is implicated in thermal responses to restraint.
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Biancardi V, Bícego KC, Almeida MC, Gargaglioni LH. Locus coeruleus noradrenergic neurons and CO2 drive to breathing. Pflugers Arch 2007; 455:1119-28. [PMID: 17851683 DOI: 10.1007/s00424-007-0338-8] [Citation(s) in RCA: 143] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2007] [Revised: 08/08/2007] [Accepted: 08/27/2007] [Indexed: 01/17/2023]
Abstract
The Locus coeruleus (LC) has been suggested as a CO(2) chemoreceptor site in mammals. In the present study, we assessed the role of LC noradrenergic neurons in the cardiorespiratory and thermal responses to hypercapnia. To selectively destroy LC noradrenergic neurons, we administered 6-hydroxydopamine (6-OHDA) bilaterally into the LC of male Wistar rats. Control animals had vehicle (ascorbic acid) injected (sham group) into the LC. Pulmonary ventilation (plethysmograph), mean arterial pressure (MAP), heart rate (HR), and body core temperature (T (c), data loggers) were measured followed by 60 min of hypercapnic exposure (7% CO(2) in air). To verify the correct placement and effectiveness of the chemical lesions, tyrosine hydroxylase immunoreactivity was performed. Hypercapnia caused an increase in pulmonary ventilation in all groups, which resulted from increases in respiratory frequency and tidal volume (V (T)) in sham-operated and 6-OHDA-lesioned groups. The hypercapnic ventilatory response was significantly decreased in 6-OHDA-lesioned rats compared with sham group. This difference was due to a decreased V (T) in 6-OHDA rats. LC chemical lesion or hypercapnia did not affect MAP, HR, and T (c). Thus, we conclude that LC noradrenergic neurons modulate hypercapnic ventilatory response but play no role in cardiovascular and thermal regulation under resting conditions.
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Affiliation(s)
- Vivian Biancardi
- Department of Animal Morphology and Physiology, Sao Paulo State University-UNESP FCAV, Jaboticabal, SP, Brazil
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da Silva AOF, Gargaglioni LH, Branco LGS. 5-HT2A serotoninergic receptor in the locus coeruleus participates in the first phase of lipopolysaccharide-induced fever. Can J Physiol Pharmacol 2007; 85:497-501. [PMID: 17632583 DOI: 10.1139/y07-038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was aimed at testing the hypothesis that serotoninergic receptors in the locus coeruleus (LC) play a role in bacterial lipopolysaccharide-induced fever. To this end, 5-HT1A (WAY-100635; 3 μg/100 nL) and 5-HT2A (ketanserin; 2 μg/100 nL) antagonists were microinjected into the LC and body temperature was monitored by biotelemetry. Intra-LC microinjections of ketanserin or WAY-100635 caused no change in body temperature of euthermic animals. 5-HT2A antagonism abolished the first phase of the lipopolysaccharide-induced fever. Taken together, these results indicate that serotonin acting on 5-HT2A receptors in the LC mediates the first phase of the febrile response, whereas 5-HT1A receptors are not involved in the lipopolysaccharide-induced fever.
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