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Zhang B, Li X, Li X, Lu Z, Cai X, Ou Yang Q, Ma P, Dong J. Lipopolysaccharide Enhances Tanshinone Biosynthesis via a Ca 2+-Dependent Manner in Salvia miltiorrhiza Hairy Roots. Int J Mol Sci 2020; 21:ijms21249576. [PMID: 33339149 PMCID: PMC7765610 DOI: 10.3390/ijms21249576] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 01/13/2023] Open
Abstract
Tanshinones, the major bioactive components in Salvia miltiorrhiza Bunge (Danshen), are synthesized via the mevalonic acid (MVA) pathway or the 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway and the downstream biosynthesis pathway. In this study, the bacterial component lipopolysaccharide (LPS) was utilized as a novel elicitor to induce the wild type hairy roots of S. miltiorrhiza. HPLC analysis revealed that LPS treatment resulted in a significant accumulation of cryptotanshinone (CT) and dihydrotanshinone I (DTI). qRT-PCR analysis confirmed that biosynthesis genes such as SmAACT and SmHMGS from the MVA pathway, SmDXS and SmHDR from the MEP pathway, and SmCPS, SmKSL and SmCYP76AH1 from the downstream pathway were markedly upregulated by LPS in a time-dependent manner. Furthermore, transcription factors SmWRKY1 and SmWRKY2, which can activate the expression of SmDXR, SmDXS and SmCPS, were also increased by LPS. Since Ca2+ signaling is essential for the LPS-triggered immune response, Ca2+ channel blocker LaCl3 and CaM antagonist W-7 were used to investigate the role of Ca2+ signaling in tanshinone biosynthesis. HPLC analysis demonstrated that both LaCl3 and W-7 diminished LPS-induced tanshinone accumulation. The downstream biosynthesis genes including SmCPS and SmCYP76AH1 were especially regulated by Ca2+ signaling. To summarize, LPS enhances tanshinone biosynthesis through SmWRKY1- and SmWRKY2-regulated pathways relying on Ca2+ signaling. Ca2+ signal transduction plays a key role in regulating tanshinone biosynthesis in S. miltiorrhiza.
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Affiliation(s)
- Bin Zhang
- College of Life Sciences, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China; (B.Z.); (X.L.); (Z.L.); (Q.O.Y.); (P.M.)
| | - Xueying Li
- College of Life Sciences, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China; (B.Z.); (X.L.); (Z.L.); (Q.O.Y.); (P.M.)
| | - Xiuhong Li
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China;
| | - Zhigang Lu
- College of Life Sciences, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China; (B.Z.); (X.L.); (Z.L.); (Q.O.Y.); (P.M.)
| | - Xiaona Cai
- College of Innovation and Experiment, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China;
| | - Qing Ou Yang
- College of Life Sciences, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China; (B.Z.); (X.L.); (Z.L.); (Q.O.Y.); (P.M.)
| | - Pengda Ma
- College of Life Sciences, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China; (B.Z.); (X.L.); (Z.L.); (Q.O.Y.); (P.M.)
| | - Juane Dong
- College of Life Sciences, Northwest A&F University, No.3 Taicheng Road, Yangling 712100, China; (B.Z.); (X.L.); (Z.L.); (Q.O.Y.); (P.M.)
- Correspondence: ; Tel.: +86-029-8709-2262
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Yousefi M, Jonaidi H, Sadeghi B. Influence of peripheral lipopolysaccharide (LPS) on feed intake, body temperature and hypothalamic expression of neuropeptides involved in appetite regulation in broilers and layer chicks. Br Poult Sci 2020; 62:110-117. [PMID: 32820660 DOI: 10.1080/00071668.2020.1813254] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
1. This study examined the expression of genes related to appetite-regulating neuropeptides in the hypothalamus of broiler and layer chicks (Gallus gallus) after intraperitoneal (IP) injection of lipopolysaccharide (LPS). 2. Both broiler and layer chicks received (n = 10 per group) LPS at doses of 0 and 200 µg and feed intake was measured up to 6 h after injection. In a further experiment, (n = 8 per group) mRNA abundance of some hypothalamic neuropeptides was measured 2 h after injection. The rectal temperature of each chick was measured before and 2 h post-injection. 3. Feed intake was significantly decreased by LPS from 2 h after injection and thereafter, while the rectal temperature did not change. 4. LPS decreased the expression of appetite-enhancing neuropeptides: neuropeptide Y (NPY) and agouti-related peptide (AgRP) in broilers and, NPY in layer chicks. The expression of appetite-suppressing neuropeptides (corticotrophin-releasing factor (CRF), proopiomelanocortin (POMC) and, cocaine and amphetamine regulated-transcript (CART) was not changed in broilers, while CRF tended to decrease and POMC was significantly decreased in layers. The abundance of the cytokine tumour necrosis factor-alpha (TNF-α) did not change in broilers but was decreased in layers. 5. The findings indicated that the reduction in gene expression of hypothalamic appetite-enhancing neuropeptides NPY and AgRP is responsible for anorexia caused by LPS at a dose that did not influence body temperature.
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Affiliation(s)
- M Yousefi
- Division of Physiology, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman (SBUK) , Kerman, Iran
| | - H Jonaidi
- Division of Physiology, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman (SBUK) , Kerman, Iran
| | - B Sadeghi
- Division of Food Hygiene and Public Health, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman (SBUK) , Kerman, Iran
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Torres-Fuentes C, Golubeva AV, Zhdanov AV, Wallace S, Arboleya S, Papkovsky DB, El Aidy S, Ross P, Roy BL, Stanton C, Dinan TG, Cryan JF, Schellekens H. Short-chain fatty acids and microbiota metabolites attenuate ghrelin receptor signaling. FASEB J 2019; 33:13546-13559. [DOI: 10.1096/fj.201901433r] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Cristina Torres-Fuentes
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
| | - Anna V. Golubeva
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | | | - Shauna Wallace
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
| | - Silvia Arboleya
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
- Teagasc Food Research Centre, Cork, Ireland
| | | | - Sahar El Aidy
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
| | - Paul Ross
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
| | | | - Catherine Stanton
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
- Teagasc Food Research Centre, Cork, Ireland
| | - Timothy G. Dinan
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Psychiatry and Neurobehavioral Science, University College Cork, Cork, Ireland
| | - John F. Cryan
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - Harriet Schellekens
- Alimentary Pharmabiotic Centre (APC) Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
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Huang J, Liu W, Doycheva DM, Gamdzyk M, Lu W, Tang J, Zhang JH. Ghrelin attenuates oxidative stress and neuronal apoptosis via GHSR-1α/AMPK/Sirt1/PGC-1α/UCP2 pathway in a rat model of neonatal HIE. Free Radic Biol Med 2019; 141:322-337. [PMID: 31279091 PMCID: PMC6718314 DOI: 10.1016/j.freeradbiomed.2019.07.001] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 07/01/2019] [Accepted: 07/02/2019] [Indexed: 11/26/2022]
Abstract
Neuronal apoptosis induced by oxidative stress is one of the major pathological processes involved in neurological impairment after hypoxic-ischemic encephalopathy (HIE). Ghrelin, the unique endogenous ligand for the growth hormone secretagogue receptor-1α (GHSR-1α), could take an anti-apoptotic role in the brain. However, whether ghrelin can attenuate neuronal apoptosis by attenuating oxidative stress after hypoxia-ischemia (HI) insult remains unknown. To investigate the beneficial effects of ghrelin on oxidative stress injury and neuronal apoptosis induced by HI, ten-day old unsexed rat pups were subjected to HI injury and exogenous recombinant human ghrelin(rh-Ghrelin) was administered intranasally at 1 h and 24 h after HI induction. [D-Lys3]-GHRP-6, a selective inhibitor of GHSR-1α and Ex527, a selective inhibitor of GHSR-1α were administered intranasally at 1 h before HI induction respectively. Small interfering ribonucleic acid (siRNA) for GHSR-1α were administered by intracerebroventricular (i.c.v) injection at 24 h before HI induction. Neurological tests, immunofluorescence, MitoSox staining, Fluoro-Jade C staining, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining, and western blot experiments were performed. Our results indicated that ghrelin significantly improved neurobehavioral outcomes and reduced oxidative stress and neuronal apoptosis. Moreover, ghrelin treatment significantly promoted phosphorylation of AMPK, upregulated the expression of Sirt1, PGC-1α, UCP2 and the ratio of Bcl2/Bax, while it downregulated cleaved caspase-3 levels. The protective effects of ghrelin were reversed by [D-Lys3]-GHRP-6, GHSR-1α siRNA or Ex527. In conclusion, our data demonstrated that ghrelin reduced oxidative stress injury and neuronal apoptosis which was in part via the GHSR-1α/AMPK/Sirt1/PGC-1α/UCP2 signalling pathway after HI. Ghrelin may be a novel therapeutic target for treatment after neonatasl HI injury.
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Affiliation(s)
- Juan Huang
- Institute of Neuroscience, Chongqing Medical University, Chongqing, 400016, China; Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Wei Liu
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA; Department of Physiology, School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Desislava Met Doycheva
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Marcin Gamdzyk
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Weitian Lu
- Institute of Neuroscience, Chongqing Medical University, Chongqing, 400016, China; Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Jiping Tang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, 92350, USA; Department of Anesthesiology, Loma Linda University, Loma Linda, CA, 92350, USA; Department of Neurosurgery, Loma Linda University, Loma Linda, CA, 92350, USA.
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Holubová M, Blechová M, Kákonová A, Kuneš J, Železná B, Maletínská L. In Vitro and In Vivo Characterization of Novel Stable Peptidic Ghrelin Analogs: Beneficial Effects in the Settings of Lipopolysaccharide-Induced Anorexia in Mice. J Pharmacol Exp Ther 2018; 366:422-432. [PMID: 29914876 DOI: 10.1124/jpet.118.249086] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/08/2018] [Indexed: 01/08/2023] Open
Abstract
Ghrelin, the only known orexigenic gut hormone produced primarily in the stomach, has lately gained attention as a potential treatment of anorexia and cachexia. However, its biologic stability is highly limited; therefore, a number of both peptide and nonpeptide ghrelin analogs have been synthesized. In this study, we provide in vitro and in vivo characterization of a series of novel peptide growth hormone secretagogue receptor (GHS-R1a) agonists, both under nonpathologic conditions and in the context of lipopolysaccharide (LPS)-induced anorexia. These analogs were based on our previous series modified by replacing the Ser3 with diaminopropionic acid (Dpr), the N-terminal Gly with sarcosine, and Phe4 with various noncoded amino acids. New analogs were further modified by replacing the n-octanoyl bound to Dpr3 with longer or unsaturated fatty acid residues, by incorporation of the second fatty acid residue into the molecule, or by shortening the peptide chain. These modifications preserved the ability of ghrelin analogs to bind to the membranes of cells transfected with GHS-R1a, as well as the GHS-R1a signaling activation. The selected analogs exhibited long-lasting and potent orexigenic effects after a single s.c. administration in mice. The stability of new ghrelin analogs in mice after s.c. administration was significantly higher when compared with ghrelin and [Dpr3]ghrelin, with half-lives of approximately 2 hours. A single s.c. injection of the selected ghrelin analogs in mice with LPS-induced anorexia significantly increased food intake via the activation of orexigenic pathways and normalized blood levels of proinflammatory cytokines, demonstrating the anti-inflammatory potential of the analogs.
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Affiliation(s)
- Martina Holubová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic (M.H., M.B., A.K., J.K., B.Ž., L.M.) and Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic (J.K.)
| | - Miroslava Blechová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic (M.H., M.B., A.K., J.K., B.Ž., L.M.) and Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic (J.K.)
| | - Anna Kákonová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic (M.H., M.B., A.K., J.K., B.Ž., L.M.) and Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic (J.K.)
| | - Jaroslav Kuneš
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic (M.H., M.B., A.K., J.K., B.Ž., L.M.) and Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic (J.K.)
| | - Blanka Železná
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic (M.H., M.B., A.K., J.K., B.Ž., L.M.) and Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic (J.K.)
| | - Lenka Maletínská
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic (M.H., M.B., A.K., J.K., B.Ž., L.M.) and Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic (J.K.)
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