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https://www.readbyqxmd.com/read/28805491/intermedin-inhibits-unilateral-ureteral-obstruction-induced-oxidative-stress-via-nadph-oxidase-nox4-and-camp-dependent-mechanisms
#1
Xi Qiao, Lihua Wang, Yanhong Wang, Xiaole Su, Yue Qi, Yun Fan, Zhiqiang Peng
NADPH oxidase Nox4-derived reactive oxygen species (ROS) play important roles in renal fibrosis. Our previous study demonstrated that intermedin (IMD) alleviated unilateral ureteral obstruction (UUO)-induced renal fibrosis by inhibition of ROS. However, the precise mechanisms remain unclear. Herein, we investigated the effect of IMD on Nox4 expression and NADPH oxidase activity in rat UUO model, and explored if these effect were achieved through cAMP-PKA pathway, the important post-receptor signal transduction pathway of IMD, in TGF-β1-stimulated rat proximal tubular cell (NRK-52E)...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28795663/-evaluation-function-of-intermedin-on-prognosis-of-elderly-patients-with-sepsis
#2
Yi Zhang, Fengxue Zhu, Weihuan Du, Yongmei He, Li Guo, Zhihong Yan, Hong Ji
OBJECTIVE: To investigate the predicting value of intermedin (IMD) for the prognosis of elderly sepsis patients. METHODS: A retrospective analysis was conducted. Forty-one patients with sepsis, aged ≥65 years, and admitted to geriatrics intensive care unit of Aerospace Center Hospital from April 2015 to December 2016 were enrolled. Thirty healthy patients were studied as control during the same time. The expression of C-reactive protein (CRP), procalcitonin (PCT) and IMD were tested within 24 hours during hospitalization, and the acute physiology and chronic health evaluation II (APACHE II) score and prognosis was evaluated...
August 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28697727/intermedin-attenuates-renal-fibrosis-by-induction-of-heme-oxygenase-1-in-rats-with-unilateral-ureteral-obstruction
#3
Xi Qiao, Lihua Wang, Yanhong Wang, Xiaole Su, Yufeng Qiao, Yun Fan, Zhiqiang Peng
BACKGROUND: Intermedin [IMD, adrenomedullin-2 (ADM-2)] attenuates renal fibrosis by inhibition of oxidative stress. However, the precise mechanisms remain unknown. Heme oxygenase-1 (HO-1), an antioxidant agent, is associated with antifibrogenic effects. ADM is known to induce HO-1. Whether IMD has any effect on HO-1 is unclear. Herein, we determined whether the antifibrotic properties of IMD are mediated by induction of HO-1. METHODS: Renal fibrosis was induced by unilateral ureteral obstruction (UUO) performed on male Wistar rats...
July 11, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28627670/intermedin-improves-cardiac-function-and-sympathetic-neural-remodeling-in-a-rat-model-of-post-myocardial-infarction-heart-failure
#4
Bin Xu, Hao Xu, Heng Cao, Xiaoxiao Liu, Chunhuan Qin, Yanzhou Zhao, Xiaolin Han, Hongli Li
Emerging evidence has suggested that intermedin (IMD), a novel member of the calcitonin gene‑related peptide (CGRP) family, has a wide range of cardioprotective effects. The present study investigated the effects of long‑term administration of IMD on cardiac function and sympathetic neural remodeling in heart failure (HF) rats, and studied potential underlying mechanism. HF was induced in rats by myocardial infarction (MI). Male Sprague Dawley rats were randomly assigned to either saline or IMD (0.6 µg/kg/h) treatment groups for 4 weeks post‑MI...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28417590/calcitonin-gene-related-peptide-cgrp-a-novel-target-for-alzheimer-s-disease
#5
REVIEW
Yogendra Singh, Gaurav Gupta, Birendra Shrivastava, Rajiv Dahiya, Juhi Tiwari, Madhu Ashwathanarayana, Rakesh Kumar Sharma, Mohit Agrawal, Anurag Mishra, Kamal Dua
Alzheimer's disease (AD) is leading cause of death among older characterized by neurofibrillary tangles, oxidative stress, progressive neuronal deficits, and increased levels of amyloid-β (Aβ) peptides. Cholinergic treatment could be the best suitable physiological therapy for AD. Calcitonin gene-related peptide (CGRP) is a thirty-seven-amino acid regulatory neuropeptide resulting from different merging of the CGRP gene, which also includes adrenomedullin, amylin, calcitonin, intermedin, and calcitonin receptor-stimulating peptide...
June 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28413495/perioperative-application-of-salvianolate-on-oxidative-stress-and-plasma-imd-adm2-in-patients-with-acute-myocardial-infarction-undergoing-pci
#6
Qiang Zhang, Fengjun Jiao, Chongjun Hua
The present study was conducted to investigate the effects of salvianolate on perioperative oxidative stress and plasma Intermedin/adrenomedullin 2 (IMD/ADM2) in patients with acute myocardial infarction (AMI) undergoing percutaneous coronary intervention (PCI). The clinical data of 108 patients with AMI treated by PCI were retrospectively analyzed. According to the use of salvianolate in perioperative period, the patients were divided into the study group (n=62) and the control group (n=46). The control group was given routine treatment while the study group was given routine treatment combined with intravenous infusion of salvianolate (200 mg administered once at 24 h before operation, once/day after operation, 1 week later, the curative effect was observed)...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28407200/adrenomedullin-2-intermedin-a-putative-drug-candidate-for-treatment-of-cardiometabolic-diseases
#7
REVIEW
Song-Yang Zhang, Ming-Jiang Xu, Xian Wang
Adrenomedullin (ADM) 2/Intermedin (IMD) is a short peptide that belongs to the CGRP superfamily. Although it shares receptors with CGRP, ADM and amylin (AMY), ADM2 has significant and unique functions in the cardiovascular system. In the past decade, the cardiovascular effect of ADM2 has carefully been studied. In this review, progress in understanding ADM2's effects on the cardiovascular system as well as its protective role in cardiometabolic diseases are summarized.
April 13, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28259938/intermedin1%C3%A2-53-enhances-angiogenesis-and-attenuates-adverse-remodeling-following-myocardial-infarction-by-activating-amp%C3%A2-activated-protein-kinase
#8
Kankai Chen, Meiling Yan, Yongguang Li, Zhifeng Dong, Dong Huang, Jingbo Li, Meng Wei
Adverse ventricular remodeling is a maladaptive response to acute loss of myocardium and an important risk factor for heart failure following myocardial infarction (MI). Intermedin (IMD) is a novel member of the calcitonin/calcitonin gene‑related peptide family, which may possess potent cardioprotective properties. The aim of the present study was to determine whether IMD1‑53, a mature bioactive form of IMD, may promote therapeutic angiogenesis within the infarcted myocardium, therefore attenuating adverse ventricular remodeling post‑MI...
April 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28065931/intermedin-1-53-inhibits-myocardial-fibrosis-in-rats-by-down-regulating-transforming-growth-factor-%C3%AE
#9
Jian Fang, Jiangwei Luan, Gaohong Zhu, Chang Qi, Zhiyong Yang, Sheng Zhao, Bin Li, Xinzhong Zhang, Naipeng Guo, Xiaodong Li, Dandan Wang
BACKGROUND Myocardial fibrosis is the result of persistent anoxia and ischemic myocardial fibers caused by coronary atherosclerotic stenosis, which lead to heart failure, threatening the patient's life. This study aimed to explore the regulatory role of intermedin 1-53 (IMD1-53) in cardiac fibrosis using neonatal rat cardiac fibroblasts and a myocardial infarction (MI) rat model both in vitro and in vivo. MATERIAL AND METHODS The Western blot method was used to detect the protein expression of collagen I and collagen III in myocardial fibroblasts...
January 9, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28057159/-the-effect-and-mechanism-investigation-of-intermedin-on-the-apoptosis-of-bone-marrow-derived-mesenchymal-stem-cells-induced-by-hydrogen-peroxide
#10
D M Wang, J Li, W M Chen, X P Long, B Shi, R Z Zhao
Objective: To investigate the effect and mechanism of intermedin (IMD)on the apoptosis of BMSCs induced by H2O2 and its mechanism. Methods: BMSCs being cultured in vitro. After 30 min pretreatment with 10(-6)mol/L IMD, cells were cultured in presence of 100 μmol/L H2O2 for 2 hour, cell apoptosis was determined by flow cytometry; Apoptosis related protein expression was determined by Western blotting and immunofluorescence; Protein and phosphorylation of ERK1/2 was detected by Western blotting and observe the influence of IMD after pretreatment with inhibitor of ERK1/2...
December 27, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27999422/plasma-intermedin-level-indicates-severity-and-treatment-efficacy-of-septic-shock-in-sprague-dawley-sd-rats
#11
Su-Xian Yang, Yun-Xiu Chen, Jing Xu, Zhao-Hui Yang
BACKGROUND The aim of this study was to investigate the value of plasma intermedin (IMD) in assessing severity and treatment efficacy of septic shock. MATERIAL AND METHODS Healthy male Sprague-Dawley (SD) rats were chosen and divided into a normal control group (n=15) and a shock model group (n=27) that received intravenous injection of lipopolysaccharide (LPS). Then, 3 specimens were taken from each group. The shock model group rats were divided into an LPS group and a treatment group with 12 rats each. The treatment group received intravenous injection of compound sodium lactate solution...
December 21, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27784654/calcitonin-gene-related-peptide-rescues-proximity-associations-of-its-receptor-components-calcitonin-receptor-like-receptor-and-receptor-activity-modifying-protein-1-in-rat-uterine-artery-smooth-muscle-cells-exposed-to-tumor-necrosis-factor-alpha
#12
Yuanlin Dong, Madhu Chauhan, Michael Belfort, Chandra Yallampalli
Calcitonin gene-related peptide (CALCB), adrenomedullin (ADM), and ADM2/intermedin play critical roles in vascular adaptation during pregnancy through calcitonin receptor-like receptor (CALCRL) and receptor activity-modifying proteins (RAMPs). This study was designed to assess the predominant RAMP that associates with CALCRL to form a functional receptor in the rat uterine artery smooth muscle (RUASM). We also determined if these receptor component associations are decreased by tumor necrosis factor (TNF) alpha and if CALCB, ADM, or ADM2 can rescue CALCRL/RAMP associations...
December 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/27737007/calcitonin-peptide-family-members-are-differentially-regulated-by-lps-and-inhibit-functions-of-rat-alveolar-nr8383-macrophages
#13
Aichurek Soultanova, Zbigniew Mikulski, Uwe Pfeil, Veronika Grau, Wolfgang Kummer
Members of the calcitonin peptide family-calcitonin gene-related peptide (CGRP), adrenomedullin (AM), and adrenomedullin2/intermedin (IMD)-exert modulatory effects upon monocytes and macrophages of various extrapulmonary origins. Utilizing the rat alveolar macrophage (AMφ) cell line NR8383, we here set out to determine to which extent these three peptides and their receptors are differentially regulated in AMφ and what specific effects they have on AMφ key functions. LPS treatment differentially up-regulated expression of the peptides and receptors...
2016: PloS One
https://www.readbyqxmd.com/read/27634835/intermedin1-53-attenuates-abdominal-aortic-aneurysm-by-inhibiting-oxidative-stress
#14
Wei-Wei Lu, Li-Xin Jia, Xian-Qiang Ni, Lei Zhao, Jin-Rui Chang, Jin-Sheng Zhang, Yue-Long Hou, Yi Zhu, You-Fei Guan, Yan-Rong Yu, Jie Du, Chao-Shu Tang, Yong-Fen Qi
OBJECTIVE: Oxidative stress plays a critical role in the development of abdominal aortic aneurysm (AAA). Intermedin (IMD) is a regulator of oxidative stress. Here, we investigated whether IMD reduces AAA by inhibiting oxidative stress. APPROACH AND RESULTS: In angiotensin II-induced ApoE(-)(/-) mouse and CaCl2-induced C57BL/6J mouse model of AAA, IMD1-53 significantly reduced the incidence of AAA and maximal aortic diameter. Ultrasonography, hematoxylin, and eosin staining and Verhoeff-van Gieson staining showed that IMD1-53 significantly decreased the enlarged aortas and elastic lamina degradation induced by angiotensin II or CaCl2...
November 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27583470/adrenomedullin2-adm2-intermedin-imd-a-potential-role-in-the-pathophysiology-of-preeclampsia
#15
Madhu Chauhan, Meena Balakrishnan, Alex Vidaeff, Uma Yallampalli, Fernando Lugo, Karin Fox, Michael Belfort, Chandra Yallampalli
CONTEXT: It is not known whether decreases in trophoblast invasion promoting the peptide, adrenomedullin2 (ADM2) system is associated with preeclampsia (PreE). OBJECTIVE: The objective of the study was to assess the changes in ADM2 levels in plasma, placenta, and amniotic fluid (AF) and its receptor components in placenta from PreE pregnancy compared with the age-matched normal and study the effect of ADM2 on the synthesis of nitric oxide (NO), endothelial nitric oxide synthase (eNOS), and matrix-metalloproteinase (MMP)-2 and MMP-9 in trophoblast cells...
November 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27566546/receptor-activity-modifying-protein-directed-g-protein-signaling-specificity-for-the-calcitonin-gene-related-peptide-family-of-receptors
#16
Cathryn Weston, Ian Winfield, Matthew Harris, Rose Hodgson, Archna Shah, Simon J Dowell, Juan Carlos Mobarec, David A Woodlock, Christopher A Reynolds, David R Poyner, Harriet A Watkins, Graham Ladds
The calcitonin gene-related peptide (CGRP) family of G protein-coupled receptors (GPCRs) is formed through the association of the calcitonin receptor-like receptor (CLR) and one of three receptor activity-modifying proteins (RAMPs). Binding of one of the three peptide ligands, CGRP, adrenomedullin (AM), and intermedin/adrenomedullin 2 (AM2), is well known to result in a Gαs-mediated increase in cAMP. Here we used modified yeast strains that couple receptor activation to cell growth, via chimeric yeast/Gα subunits, and HEK-293 cells to characterize the effect of different RAMP and ligand combinations on this pathway...
October 14, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27553639/spatial-expression-of-components-of-a-calcitonin-receptor-like-receptor-crl-signalling-system-crl-calcitonin-gene-related-peptide-adrenomedullin-adrenomedullin-2-intermedin-in-mouse-and-human-heart-valves
#17
Uwe Pfeil, Subhashini Bharathala, Ghulam Murtaza, Petra Mermer, Tamara Papadakis, Andreas Boening, Wolfgang Kummer
Heart valves are highly organized structures determining the direction of blood flow through the heart. Smooth muscle cells within the valve are thought to play an active role during the heart cycle, rather than being just passive flaps. The mature heart valve is composed of extracellular matrix (ECM), various differentiations of valvular interstitial cells (VIC), smooth muscle cells and overlying endothelium. VIC are important for maintaining the structural integrity of the valve, thereby affecting valve function and ECM remodelling...
December 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27355401/beneficial-effect-of-intermedin-1-53-in-septic-shock-rats-contributions-of-rho-kinase-and-bkca-pathway-mediated-improvement-in-cardiac-function
#18
Tao Li, Zhu Yu, Wu Huiling, Wu Yue, Zhang Jie, Peng Xiaoyong, Zang Jiatao, Xiang Xinming, Liangming Liu
OBJECTIVE: Intermedin (IMD) is a calcitonin gene-related peptide shown to have a protective effect on myocardial function in ischemia-reperfusion injury. Whether IMD has beneficial effect in severe sepsis and septic shock (and its underlying mechanisms) is not known. METHODS: We induced septic shock using cecal ligation and puncture (CLP). We focused on the potential beneficial effect of IMD1-53 on cardiac papillary muscle and cardiomyocytes against septic shock and its relationship with protection of cardiac function...
June 28, 2016: Shock
https://www.readbyqxmd.com/read/27352383/intermedin-a-a-new-labdane-diterpene-isolated-from-alpinia-intermedia-prolonged-the-survival-time-of-p-388d1-tumor-bearing-cdf1-mice
#19
Lih-Geeng Chen, Pei-Jung Su, Po-Wei Tsai, Ling-Ling Yang, Ching-Chiung Wang
Eight ethanolic extracts of indigenous Taiwanese plants of the genus Alpinia were tested for tumor cytotoxicity against AGS, Hep G2, HeLa, KB, and HL-60 cells. Among the 50 % and 95 % EtOH extracts of eight Alpinia species, the cytotoxic effects of Alpinia intermedia leaves were the strongest. When the leaf extract of A. intermedia was partitioned using n-hexane and aqueous solvents, the n-hexane layer showed a greater cytotoxic effect and could prolong the survival time of P-388D1 tumor-bearing CDF1 mice...
January 2017: Planta Medica
https://www.readbyqxmd.com/read/27345325/adrenomedullin-regulates-intestinal-physiology-and-pathophysiology
#20
REVIEW
S Martínez-Herrero, A Martínez
Adrenomedullin (AM) and proadrenomedullin N-terminal 20 peptide (PAMP) are 2 biologically active peptides produced by the same gene, ADM, with ubiquitous distribution and many physiological functions. Adrenomedullin is composed of 52 amino acids, has an internal molecular ring composed by 6 amino acids and a disulfide bond, and shares structural similarities with calcitonin gene-related peptide, amylin, and intermedin. The AM receptor consists of a 7-transmembrane domain protein called calcitonin receptor-like receptor in combination with a single transmembrane domain protein known as receptor activity-modifying protein...
July 2016: Domestic Animal Endocrinology
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