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Borg MJ, Xie C, Rayner CK, Horowitz M, Jones KL, Wu T. Potential for Gut Peptide-Based Therapy in Postprandial Hypotension. Nutrients 2021; 13:nu13082826. [PMID: 34444986 PMCID: PMC8399874 DOI: 10.3390/nu13082826] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/06/2021] [Accepted: 08/14/2021] [Indexed: 02/07/2023] Open
Abstract
Postprandial hypotension (PPH) is an important and under-recognised disorder resulting from inadequate compensatory cardiovascular responses to meal-induced splanchnic blood pooling. Current approaches to management are suboptimal. Recent studies have established that the cardiovascular response to a meal is modulated profoundly by gastrointestinal factors, including the type and caloric content of ingested meals, rate of gastric emptying, and small intestinal transit and absorption of nutrients. The small intestine represents the major site of nutrient-gut interactions and associated neurohormonal responses, including secretion of glucagon-like peptide-1, glucose-dependent insulinotropic peptide and somatostatin, which exert pleotropic actions relevant to the postprandial haemodynamic profile. This review summarises knowledge relating to the role of these gut peptides in the cardiovascular response to a meal and their potential application to the management of PPH.
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Affiliation(s)
- Malcolm J. Borg
- Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide 5000, Australia; (M.J.B.); (C.X.); (C.K.R.); (M.H.); (K.L.J.)
| | - Cong Xie
- Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide 5000, Australia; (M.J.B.); (C.X.); (C.K.R.); (M.H.); (K.L.J.)
| | - Christopher K. Rayner
- Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide 5000, Australia; (M.J.B.); (C.X.); (C.K.R.); (M.H.); (K.L.J.)
| | - Michael Horowitz
- Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide 5000, Australia; (M.J.B.); (C.X.); (C.K.R.); (M.H.); (K.L.J.)
- Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide 5000, Australia
| | - Karen L. Jones
- Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide 5000, Australia; (M.J.B.); (C.X.); (C.K.R.); (M.H.); (K.L.J.)
- Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide 5000, Australia
| | - Tongzhi Wu
- Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide 5000, Australia; (M.J.B.); (C.X.); (C.K.R.); (M.H.); (K.L.J.)
- Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide 5000, Australia
- Correspondence: ; Tel.: +61-8-8313-6535
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Sayers SR, Beavil RL, Fine NHF, Huang GC, Choudhary P, Pacholarz KJ, Barran PE, Butterworth S, Mills CE, Cruickshank JK, Silvestre MP, Poppitt SD, McGill AT, Lavery GG, Hodson DJ, Caton PW. Structure-functional changes in eNAMPT at high concentrations mediate mouse and human beta cell dysfunction in type 2 diabetes. Diabetologia 2020; 63:313-323. [PMID: 31732790 PMCID: PMC6946736 DOI: 10.1007/s00125-019-05029-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 09/11/2019] [Indexed: 02/26/2023]
Abstract
AIMS/HYPOTHESIS Progressive decline in functional beta cell mass is central to the development of type 2 diabetes. Elevated serum levels of extracellular nicotinamide phosphoribosyltransferase (eNAMPT) are associated with beta cell failure in type 2 diabetes and eNAMPT immuno-neutralisation improves glucose tolerance in mouse models of diabetes. Despite this, the effects of eNAMPT on functional beta cell mass are poorly elucidated, with some studies having separately reported beta cell-protective effects of eNAMPT. eNAMPT exists in structurally and functionally distinct monomeric and dimeric forms. Dimerisation is essential for the NAD-biosynthetic capacity of NAMPT. Monomeric eNAMPT does not possess NAD-biosynthetic capacity and may exert distinct NAD-independent effects. This study aimed to fully characterise the structure-functional effects of eNAMPT on pancreatic beta cell functional mass and to relate these to beta cell failure in type 2 diabetes. METHODS CD-1 mice and serum from obese humans who were without diabetes, with impaired fasting glucose (IFG) or with type 2 diabetes (from the Body Fat, Surgery and Hormone [BodyFatS&H] study) or with or at risk of developing type 2 diabetes (from the VaSera trial) were used in this study. We generated recombinant wild-type and monomeric eNAMPT to explore the effects of eNAMPT on functional beta cell mass in isolated mouse and human islets. Beta cell function was determined by static and dynamic insulin secretion and intracellular calcium microfluorimetry. NAD-biosynthetic capacity of eNAMPT was assessed by colorimetric and fluorescent assays and by native mass spectrometry. Islet cell number was determined by immunohistochemical staining for insulin, glucagon and somatostatin, with islet apoptosis determined by caspase 3/7 activity. Markers of inflammation and beta cell identity were determined by quantitative reverse transcription PCR. Total, monomeric and dimeric eNAMPT and nicotinamide mononucleotide (NMN) were evaluated by ELISA, western blot and fluorometric assay using serum from non-diabetic, glucose intolerant and type 2 diabetic individuals. RESULTS eNAMPT exerts bimodal and concentration- and structure-functional-dependent effects on beta cell functional mass. At low physiological concentrations (~1 ng/ml), as seen in serum from humans without diabetes, eNAMPT enhances beta cell function through NAD-dependent mechanisms, consistent with eNAMPT being present as a dimer. However, as eNAMPT concentrations rise to ~5 ng/ml, as in type 2 diabetes, eNAMPT begins to adopt a monomeric form and mediates beta cell dysfunction, reduced beta cell identity and number, increased alpha cell number and increased apoptosis, through NAD-independent proinflammatory mechanisms. CONCLUSIONS/INTERPRETATION We have characterised a novel mechanism of beta cell dysfunction in type 2 diabetes. At low physiological levels, eNAMPT exists in dimer form and maintains beta cell function and identity through NAD-dependent mechanisms. However, as eNAMPT levels rise, as in type 2 diabetes, structure-functional changes occur resulting in marked elevation of monomeric eNAMPT, which induces a diabetic phenotype in pancreatic islets. Strategies to selectively target monomeric eNAMPT could represent promising therapeutic strategies for the treatment of type 2 diabetes.
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Affiliation(s)
- Sophie R Sayers
- Diabetes Research Group, Department of Diabetes, School of Life Course Sciences, King's College London, Hodgkin Building, Guy's Campus, London, SE1 1UL, UK
| | - Rebecca L Beavil
- Protein Production Facility, Randall Centre for Cell and Molecular Biophysics, King's College London, London, UK
| | - Nicholas H F Fine
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Birmingham, UK
- Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham, Birmingham, UK
- Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK
| | - Guo C Huang
- Diabetes Research Group, Department of Diabetes, School of Life Course Sciences, King's College London, Hodgkin Building, Guy's Campus, London, SE1 1UL, UK
| | - Pratik Choudhary
- Diabetes Research Group, Department of Diabetes, School of Life Course Sciences, King's College London, Hodgkin Building, Guy's Campus, London, SE1 1UL, UK
| | - Kamila J Pacholarz
- Michael Barber Centre for Collaborative Mass Spectrometry, School of Chemistry, Manchester Institute of Biotechnology, Manchester, UK
| | - Perdita E Barran
- Michael Barber Centre for Collaborative Mass Spectrometry, School of Chemistry, Manchester Institute of Biotechnology, Manchester, UK
| | - Sam Butterworth
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Charlotte E Mills
- Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK
- Nutrition Research Group, University of Reading, Reading, UK
| | - J Kennedy Cruickshank
- Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK
| | - Marta P Silvestre
- Human Nutrition Unit, School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Sally D Poppitt
- Human Nutrition Unit, School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Anne-Thea McGill
- Human Nutrition Unit, School of Biological Sciences, University of Auckland, Auckland, New Zealand
- School of Health & Human Sciences, Southern Cross University, Lismore, NSW, Australia
| | - Gareth G Lavery
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Birmingham, UK
- Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham, Birmingham, UK
- Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK
| | - David J Hodson
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Birmingham, UK
- Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham, Birmingham, UK
- Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK
| | - Paul W Caton
- Diabetes Research Group, Department of Diabetes, School of Life Course Sciences, King's College London, Hodgkin Building, Guy's Campus, London, SE1 1UL, UK.
- Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK.
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Butler OL, Mekhael MM, Ahmed A, Cuthbertson DJ, Pritchard DM. Frequency and Causes of False-Positive Elevated Plasma Concentrations of Fasting Gut Hormones in a Specialist Neuroendocrine Tumor Center. Front Endocrinol (Lausanne) 2020; 11:606264. [PMID: 33391185 PMCID: PMC7774602 DOI: 10.3389/fendo.2020.606264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/16/2020] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION In the UK, the fasting plasma concentrations of a panel of gut hormones (comprising vasoactive intestinal peptide (VIP), gastrin, pancreatic polypeptide (PP), glucagon, somatostatin and chromogranin A) are measured to evaluate patients who have or who (due to unexplained and compatible symptoms) are suspected of having neuroendocrine tumors (NETs). False positive elevated hormone concentrations are sometimes found. OBJECTIVE To evaluate the frequency and implications of false positive fasting gut hormone results. METHODS Retrospective audit of fasting gut hormone profile results at a large UK university teaching hospital over 12 months. RESULTS Fasting gut hormone concentrations were measured in 231 patients during 2017. No NETs were found in the 88 patients who had this test performed only to investigate symptoms. 31 false positive gastrin, 8 false positive chromogranin A, two false positive glucagon, three false positive somatostatin, one false positive PP, and one false positive VIP results were found. We extended the audit for glucagon and somatostatin for an additional two years and found seven probable false-positive raised glucagon concentrations and four probable false-positive elevated plasma somatostatin concentrations in total. CONCLUSIONS False-positive elevations of plasma gastrin and chromogranin A were common and causes such as proton pump inhibitor use or inadequate fasting accounted for most cases. Elevated plasma concentrations of the other gut hormones were also detected in patients who had no other evidence of NET. Other diagnoses (e.g. cirrhosis and medullary thyroid carcinoma for hypersomatostatinemia and type 2 diabetes mellitus, pancreatitis, liver or renal impairment for hyperglucagonemia) may cause these false positive results.
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Affiliation(s)
- Olivia L. Butler
- School of Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Monica M. Mekhael
- School of Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Arslan Ahmed
- School of Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Daniel J. Cuthbertson
- Insitute of Lifecourse and Medical Sciences, University of Liverpool, Liverpool, United Kingdom
- ENETS Centre of Excellence, Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
| | - D. Mark Pritchard
- ENETS Centre of Excellence, Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, United Kingdom
- *Correspondence: D. Mark Pritchard,
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Lee J, Kwon A, Chae HW, Lee WJ, Kim TH, Kim HS. Effect of the Orally Active Growth Hormone Secretagogue MK-677 on Somatic Growth in Rats. Yonsei Med J 2018; 59:1174-1180. [PMID: 30450851 PMCID: PMC6240568 DOI: 10.3349/ymj.2018.59.10.1174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Growth hormone secretagogues (GHSs) possess the ability to release growth hormone (GH) in the body. This study aimed to investigate the effects of MK-677, an orally active GHS, on somatic growth in rats. MATERIALS AND METHODS The serum levels of GH were measured after oral administration of MK-677 to confirm GH stimulatory effects. Body weight, body length, tibia length, epiphyseal plate width, and serum levels of insulin-like growth factor (IGF)-I were measured after oral administration of 4 mg/kg of MK-677 for 6 weeks to investigate growth-promoting effects. RESULTS Oral administration of MK-677 at 4 mg/kg increased peak GH concentrations by 1.8-fold, compared to baseline. However, oral administration of MK-677 for 6 weeks did not increase body growth or serum levels of IGF-I. At 6 weeks after treatment, the GH response to MK-677 was abolished. Pituitary GH mRNA and hypothalamic GH-releasing hormone mRNA, and GH secretagogue receptor (GHSR) mRNA expression in the pituitary and hypothalamus did not differ between the control and treatment group. Somatostatin (SST) mRNA expression in the hypothalamus was markedly increased in the treatment group, whereas SST receptor (SSTR)-2 mRNA expression in the pituitary gland was decreased. Protein expression of hypothalamic GHSR, SST, and pituitary SSTR-2 showed patterns similar to those for mRNA expression. CONCLUSION Our results suggest that prolonged administration of MK-677 in rats does not promote growth despite the GH stimulatory effect of MK-677, which may be related to increased expression of SST in the hypothalamus. Further studies are needed to overcome the observed desensitization to GHS.
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Affiliation(s)
- Junghun Lee
- Department of Pediatrics, Severance Children's Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Ahreum Kwon
- Department of Pediatrics, Severance Children's Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Wook Chae
- Department of Pediatrics, Severance Children's Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Woo Jung Lee
- Department of Pediatrics, Severance Children's Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Tae Hyuk Kim
- Department of Pediatrics, Severance Children's Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Ho Seong Kim
- Department of Pediatrics, Severance Children's Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea.
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Zhang J, Chen B, Liu B, Zhou X, Mu J, Wang Q, Zhao X, Yang Z. Preventive Effect of Lactobacillus fermentum CQPC03 on Activated Carbon-Induced Constipation in ICR Mice. ACTA ACUST UNITED AC 2018; 54:medicina54050089. [PMID: 30463207 PMCID: PMC6262454 DOI: 10.3390/medicina54050089] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 10/25/2018] [Accepted: 11/15/2018] [Indexed: 01/07/2023]
Abstract
Background and objectives: Paocai (pickled cabbage), which is fermented by lactic acid bacteria, is a traditional Chinese food. The microorganisms of Paocai were isolated and identified, and the constipation inhibition effect of one of the isolated Lactobacillus was investigated. Materials and Methods: The 16S rDNA technology was used for microbial identification. A mouse constipation model was established using activated carbon. After intragastric administration of Lactobacillus (10⁸ CFU/mL), the mice were dissected to prepare pathological sections of the small intestine. Serum indicators were detected using kits, and the expression of small intestine-related mRNAs was detected by qPCR assay. Results: One strain of Lactobacillus was identified and named Lactobacillus fermentum CQPC03 (LF-CQPC03). Body weight and activated carbon propulsion rate were all higher in mice intragastrically administered with LF-CQPC03 compared with the control group, while the time to the first black stool in treated mice was lower than that in the control group. Serum assays showed that gastrin (Gas), endothelin (ET), and acetylcholinesterase (AchE) levels were significantly higher in the LF-CQPC03-treated mice than in the control group, while somatostatin (SS) levels were significantly lower than in the control mice. Mouse small intestine tissue showed that c-Kit, stem cell factor (SCF), and glial cell-derived neurotrophic factor (GDNF) mRNA expression levels were significantly higher in the LF-CQPC03 treated mice than in control mice, while transient receptor potential cation channel subfamily V member 1 (TRPV1) and inducible nitric oxide synthase (iNOS) expression levels were significantly lower in the LF-CQPC03 treated mice than in control mice. Conclusions: There is a better effect with high-dose LF-CQPC03, compared to the lower dose (LF-CQPC03-L), showing good probiotic potential, as well as development and application value.
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Affiliation(s)
- Jing Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 102488, China.
- Environmental and Quality Inspection College, Chongqing Chemical Industry Vocational College, Chongqing 401228, China.
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Benshou Chen
- Environmental and Quality Inspection College, Chongqing Chemical Industry Vocational College, Chongqing 401228, China.
| | - Baosi Liu
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Xianrong Zhou
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
- College of Food Science, Southwest University, Chongqing 400715, China.
| | - Jianfei Mu
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
- College of Food Science, Southwest University, Chongqing 400715, China.
| | - Qiang Wang
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Xin Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 102488, China.
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Zhennai Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 102488, China.
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Pethő G, Bölcskei K, Füredi R, Botz B, Bagoly T, Pintér E, Szolcsányi J. Evidence for a novel, neurohumoral antinociceptive mechanism mediated by peripheral capsaicin-sensitive nociceptors in conscious rats. Neuropeptides 2017; 62:1-10. [PMID: 28291541 DOI: 10.1016/j.npep.2017.02.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 12/16/2016] [Accepted: 02/07/2017] [Indexed: 11/20/2022]
Abstract
Stimulation of capsaicin-sensitive peripheral sensory nerve terminals induces remote anti-inflammatory effects throughout the body of anesthetized rats and guinea-pigs mediated by somatostatin. As somatostatin has also antinociceptive effects, the study aimed at investigating whether similar remote antinociceptive effects can be demonstrated in awake animals. In conscious rats, nociceptive nerve endings of the right hind paw decentralized by cutting the sciatic and saphenous nerves 18h before were chemically stimulated, and drop of the noxious heat threshold (heat hyperalgesia) induced by prior (18h before) plantar incision was measured on the contralateral, left hind paw using an increasing-temperature water bath. 18h after nerve transection, mustard oil-evoked plasma extravasation was not significantly reduced in the right hind paw as tested by in vivo fluorescence imaging. Applying agonist of either transient receptor potential vanilloid 1 (TRPV1) or transient receptor potential ankyrin 1 (TRPA1) receptor (capsaicin or mustard oil, respectively) to the nerve-transected paw inhibited the plantar incision-induced drop of the noxious heat threshold on the contralateral paw. The onset of these remote antihyperalgesic effects was 10-20min. A similar contralateral inhibitory effect of capsaicin or mustard oil treatment was observed on neuropathic mechanical hyperalgesia evoked by partial sciatic nerve injury 2days before nerve transection and measured by a Randall-Selitto apparatus. The remote thermal antihyperalgesic effect was prevented by chronic (5days) denervation or local capsaicin desensitization of the stimulated paw; reduced by intraperitoneally applied antagonist of somatostatin (cyclosomatostatin) or opioid receptors (naloxone). The response was mimicked by intraperitoneally applied somatostatin and associated with a 72±27% increase in plasma somatostatin-like immunoreactivity that was absent after chronic (5days) denervation. In conclusion, chemical activation of decentralized peripheral capsaicin-sensitive nociceptors evokes remote antihyperalgesic responses initiated outside the central nervous system and mediated by somatostatin and endogenous opioids.
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Affiliation(s)
- Gábor Pethő
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary.
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; Molecular Pharmacology Research Team, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Réka Füredi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Bálint Botz
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; Molecular Pharmacology Research Team, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Teréz Bagoly
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
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Abstract
Neurogenin3-driven deletion of tuberous sclerosis complex 1 (Tsc1) activated mechanistic target of rapamycin complex 1 (mTORC1) measured by the upregulation of mTOR and S6 phosphorylation in islet cells. Neurogenin3-Tsc1-/- mice demonstrated a significant increase in average islet size and mean area of individual islet cell. Insulin mRNA and plasma insulin levels increased significantly after weaning. Glucagon mRNA and plasma levels increased in neonate followed by modest reduction in adult. Somatostatin mRNA and plasma levels markedly increased. Neurogenin3-Tsc1-/- mice fed standard chow demonstrated a significant improvement in glucose tolerance and no alteration in insulin sensitivity. In Neurogenin3-Tsc1-/- mice fed 45% high-fat diets, both glucose tolerance and insulin sensitivity were significantly impaired. Rapamycin reversed the activation of mTORC1, attenuated β cells hypertrophy and abolished the improvement of glucose tolerance. TSC1-mTORC1 signaling plays an important role in the development of pancreatic endocrine cells and in the regulation of glucose metabolism.
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Affiliation(s)
- Li Ding
- Department of Physiology and PathophysiologyPeking University Health Science Center, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Yue Yin
- Department of Physiology and PathophysiologyPeking University Health Science Center, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Lingling Han
- Department of Physiology and PathophysiologyPeking University Health Science Center, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Yin Li
- Department of Physiology and PathophysiologyPeking University Health Science Center, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Jing Zhao
- Department of Physiology and PathophysiologyPeking University Health Science Center, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Weizhen Zhang
- Department of Physiology and PathophysiologyPeking University Health Science Center, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
- Department of SurgeryUniversity of Michigan Medical Center, Ann Arbor, Michigan, USA
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Abstract
The aim of the study was to investigate the role of diabetic intrauterine environment on circulating insulin, glucagon, and somatostatin levels in pregnant rats, fetuses, and offspring. Diabetes was induced in female Wistar rats by streptozotocin at birth or as adult and the animals were assigned into: control (C); mildly diabetic (MD); and severely diabetic (SD). The rats were mated and distributed into 2 subgroups: euthanasia at day 21 of pregnancy and at day 10 postpartum. Both MD and SD dams showed impaired oral glucose tolerance. SD dams had lower body weight and insulin levels compared to C and MD dams. SD fetuses presented hyperglycemia and reduction of insulin and glucagon levels compared to C and MD fetuses. SD newborns had diminished total pancreatic insulin and plasma somatostatin compared to the other groups. MD dams and fetuses had lower glucagon and somatostatin levels compared to C dams. MD offspring had maintained lower somatostatin levels to neonatal period. Diabetes causes alterations in circulating levels of pancreatic hormones in the mother and offspring.
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Affiliation(s)
- I L Iessi
- Laboratory of Experimental Research in Gynecology and Obstetrics, Program of Gynecology, Obstetrics and Mastology Graduate Course, Botucatu Medical School, Unesp Univ Estadual Paulista, Botucatu, São Paulo State, Brazil
| | - Y K Sinzato
- Laboratory of Experimental Research in Gynecology and Obstetrics, Program of Gynecology, Obstetrics and Mastology Graduate Course, Botucatu Medical School, Unesp Univ Estadual Paulista, Botucatu, São Paulo State, Brazil
| | - F Q Gallego
- Laboratory of Experimental Research in Gynecology and Obstetrics, Program of Gynecology, Obstetrics and Mastology Graduate Course, Botucatu Medical School, Unesp Univ Estadual Paulista, Botucatu, São Paulo State, Brazil
| | - J H Nielsen
- Laboratory of Cellular and Metabolic Research, Department of Biomedical Science, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - D C Damasceno
- Laboratory of Experimental Research in Gynecology and Obstetrics, Program of Gynecology, Obstetrics and Mastology Graduate Course, Botucatu Medical School, Unesp Univ Estadual Paulista, Botucatu, São Paulo State, Brazil
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Hedbäck T, Almgren P, Nilsson PM, Melander O. N-Terminal Prosomatostatin as a Risk Marker for Cardiovascular Disease and Diabetes in a General Population. J Clin Endocrinol Metab 2016; 101:3437-44. [PMID: 27399347 PMCID: PMC5010564 DOI: 10.1210/jc.2016-1736] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
CONTEXT Somatostatin inhibits a range of hormones, including GH, insulin, and glucagon, but little is known about its role in the development of cardiometabolic disease. OBJECTIVE The objective of the study was to investigate whether fasting plasma concentration of N-terminal prosomatostatin (NT-proSST) is associated with the development of diabetes, coronary artery disease (CAD), and mortality. DESIGN, SETTING, AND PARTICIPANTS NT-proSST was measured in plasma from 5389 fasting participants of the population-based study Malmö Preventive Project, with a mean baseline age of 69.4 ± 6.2 years. Cox proportional hazards models adjusted for traditional cardiovascular risk factors were used to investigate the relationships between baseline NT-proSST and end points, with a mean follow-up of 5.6 ± 1.4 years. MAIN OUTCOME MEASURES CAD, diabetes, and mortality were measured. RESULTS Overall, NT-proSST (hazard ratio [HR] per SD increment of log transformed NT-proSST) was unrelated to the risk of incident diabetes (220 events; HR 1.05; 95% confidence interval [CI] 0.91-1.20; P = .531) but was related to the risk of incident CAD (370 events; HR 1.17; 95% CI 1.06-1.30; P = .003), all-cause mortality (756 events; HR 1.24; 95% CI 1.15-1.33; P < .001), and cardiovascular mortality (283 events; HR 1.33; 95% CI 1.19-1.43; P < .001). The relationships were not linear, with most of the excess risk observed in subjects with high values of NT-proSST. Subjects in the top vs bottom decile had a severely increased risk of incident CAD (HR 2.41; 95% CI 1.45-4.01; P < .001), all-cause mortality (HR 1.84; 95% CI 1.33-2.53; P < .001), and cardiovascular mortality (HR 2.44; 95% CI 1.39-4.27; P < .001). CONCLUSION NT-proSST was significantly and independently associated with the development of CAD, all-cause mortality, and cardiovascular mortality.
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Affiliation(s)
- Tore Hedbäck
- Department of Clinical Sciences, Lund University, Clinical Research Center, SE 205 02 Malmö, Sweden
| | - Peter Almgren
- Department of Clinical Sciences, Lund University, Clinical Research Center, SE 205 02 Malmö, Sweden
| | - Peter M Nilsson
- Department of Clinical Sciences, Lund University, Clinical Research Center, SE 205 02 Malmö, Sweden
| | - Olle Melander
- Department of Clinical Sciences, Lund University, Clinical Research Center, SE 205 02 Malmö, Sweden
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Koelsch S, Boehlig A, Hohenadel M, Nitsche I, Bauer K, Sack U. The impact of acute stress on hormones and cytokines, and how their recovery is affected by music-evoked positive mood. Sci Rep 2016; 6:23008. [PMID: 27020850 PMCID: PMC4810374 DOI: 10.1038/srep23008] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Accepted: 01/22/2016] [Indexed: 12/17/2022] Open
Abstract
Stress and recovery from stress significantly affect interactions between the central nervous system, endocrine pathways, and the immune system. However, the influence of acute stress on circulating immune-endocrine mediators in humans is not well known. Using a double-blind, randomized study design, we administered a CO2 stress test to n = 143 participants to identify the effects of acute stress, and recovery from stress, on serum levels of several mediators with immune function (IL-6, TNF-α, leptin, and somatostatin), as well as on noradrenaline, and two hypothalamic-pituitary-adrenal axis hormones (ACTH and cortisol). Moreover, during a 1 h-recovery period, we repeatedly measured these serum parameters, and administered an auditory mood-induction protocol with positive music and a neutral control stimulus. The acute stress elicited increases in noradrenaline, ACTH, cortisol, IL-6, and leptin levels. Noradrenaline and ACTH exhibited the fastest and strongest stress responses, followed by cortisol, IL-6 and leptin. The music intervention was associated with more positive mood, and stronger cortisol responses to the acute stressor in the music group. Our data show that acute (CO2) stress affects endocrine, immune and metabolic functions in humans, and they show that mood plays a causal role in the modulation of responses to acute stress.
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Affiliation(s)
- Stefan Koelsch
- Max Planck Institute for Human Cognitive and Brain Science, Stephanstr. 1a, 04103 Leipzig, Germany
- Department of Biological and Medical Psychology, University in Bergen, Jonas Liesvei 91, 5009 Bergen, Norway
| | - Albrecht Boehlig
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany
- Clinic for gastroenterology and rheumatology, Medical Faculty, University of Leipzig, Liebigstr. 20, 04103 Leipzig, Germany
| | - Maximilian Hohenadel
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany
| | - Ines Nitsche
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany
| | - Katrin Bauer
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany
| | - Ulrich Sack
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany
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Hu R, Wang Z, Peng Q, Zou H, Wang H, Yu X, Jing X, Wang Y, Cao B, Bao S, Zhang W, Zhao S, Ji H, Kong X, Niu Q. Effects of GHRP-2 and Cysteamine Administration on Growth Performance, Somatotropic Axis Hormone and Muscle Protein Deposition in Yaks (Bos grunniens) with Growth Retardation. PLoS One 2016; 11:e0149461. [PMID: 26894743 PMCID: PMC4760683 DOI: 10.1371/journal.pone.0149461] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 01/31/2016] [Indexed: 12/02/2022] Open
Abstract
The objective of this study was to investigate the effects of growth hormone-releasing peptide-2 (GHRP-2) and cysteamine (CS) administration on growth performance in yaks with growth retardation and try to elucidate its regulatory mechanisms. Trial 1, thirty-six 1-year-old Qinghai high plateau yaks (body weight 38–83.2 kg) were randomly chosen for body weight and jugular blood samples collection. The relationship between body weight and serum GHRH (P < 0.05, R = 0.45), GH (P < 0.05, R = 0.47), IGF-1 (P < 0.05, R = 0.62) was significantly correlated in yaks colonies with lighter body weights. Trial 2, fifteen 1-year-old Qinghai high plateau yaks with growth retardation (average body weight 54.8 ± 8.24 kg) were randomly selected and assigned to negative control group (NG), GHRP-2 injection group (GG) and cysteamine feeding group (CG), with 5 yaks per group. Another five 1-year-old Qinghai high plateau yaks with normal growth performance (average body weight 75.3 ± 2.43 kg) were selected as positive control group (PG). The average daily gain (ADG) of the GG and CG were significantly higher than those in the PG and NG (P < 0.05). Both GHRP-2 and CS administration significantly enhanced the myofiber diameter and area of skeletal muscle (P<0.05). GHRP-2 significantly enhanced the serum GH and IGF-1 levels (P < 0.05), and up-regulated GHR, IGF-1 and IGF-1R mRNA expression in the liver and skeletal muscle (P < 0.05), enhanced the mRNA expression of PI3K, AKt and mTOR in the skeletal muscle (P<0.05). CS significantly reduced the serum SS levels and the hypothalamus SS mRNA expression (P < 0.05), and enhanced GHR and IGF-1 mRNA expression in the liver (P < 0.05), decreased the mRNA expression of muscle atrophy F-box (Atrogin-1) and muscle ring finger 1 (MuRF1) mRNA (P < 0.05). Conclusions: Growth retardation in yaks was primarily due to somatotropic axis hormones secretion deficiency. Both GHRP-2 and CS administration can accelerate growth performance and GH, IGF-1 secretion in yaks with growth retardation. GHRP-2 enhanced muscle protein deposition mainly by up-regulated the protein synthesis pathways, whereas CS worked mainly by down-regulated the ubiquitin-proteasome pathway.
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Affiliation(s)
- Rui Hu
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
| | - Zhisheng Wang
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
- * E-mail:
| | - Quanhui Peng
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
| | - Huawei Zou
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
| | - Hongze Wang
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
| | - Xiaoqiang Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
| | - Xiaoping Jing
- Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan, Chengdu, Sichuan, P.R. China
| | - Yixin Wang
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - Binghai Cao
- College of Animal Science and Technology, State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, P.R. China
| | - Shanke Bao
- Animal Husbandry and Veterinary Institute, Haibei, Qinghai, P.R. China
| | - Wenhua Zhang
- Ningxia Xiahua Muslim Food Co. Ltd., Zhongwei, Ningxia, P.R. China
| | - Suonan Zhao
- Animal Husbandry and Veterinary Institute, Haibei, Qinghai, P.R. China
| | - Hanzhong Ji
- Animal Husbandry and Veterinary Institute, Haibei, Qinghai, P.R. China
| | - Xiangying Kong
- Animal Husbandry and Veterinary Institute, Haibei, Qinghai, P.R. China
| | - Quanxi Niu
- Ningxia Xiahua Muslim Food Co. Ltd., Zhongwei, Ningxia, P.R. China
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Suo H, Feng X, Zhu K, Wang C, Zhao X, Kan J. Shuidouchi (Fermented Soybean) Fermented in Different Vessels Attenuates HCl/Ethanol-Induced Gastric Mucosal Injury. Molecules 2015; 20:19748-63. [PMID: 26540032 PMCID: PMC6332132 DOI: 10.3390/molecules201119654] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 10/20/2015] [Indexed: 12/27/2022] Open
Abstract
Shuidouchi (Natto) is a fermented soy product showing in vivo gastric injury preventive effects. The treatment effects of Shuidouchi fermented in different vessels on HCl/ethanol-induced gastric mucosal injury mice through their antioxidant effect was determined. Shuidouchi contained isoflavones (daidzein and genistein), and GVFS (glass vessel fermented Shuidouchi) had the highest isoflavone levels among Shuidouchi samples fermented in different vessels. After treatment with GVFS, the gastric mucosal injury was reduced as compared to the control mice. The gastric secretion volume (0.47 mL) and pH of gastric juice (3.1) of GVFS treated gastric mucosal injury mice were close to those of ranitidine-treated mice and normal mice. Shuidouchi could decrease serum motilin (MTL), gastrin (Gas) level and increase somatostatin (SS), vasoactive intestinal peptide (VIP) level, and GVFS showed the strongest effects. GVFS showed lower IL-6, IL-12, TNF-α and IFN-γ cytokine levels than other vessel fermented Shuidouchi samples, and these levels were higher than those of ranitidine-treated mice and normal mice. GVFS also had higher superoxide dismutase (SOD), nitric oxide (NO) and malonaldehyde (MDA) contents in gastric tissues than other Shuidouchi samples. Shuidouchi could raise IκB-α, EGF, EGFR, nNOS, eNOS, Mn-SOD, Gu/Zn-SOD, CAT mRNA expressions and reduce NF-κB, COX-2, iNOS expressions as compared to the control mice. GVFS showed the best treatment effects for gastric mucosal injuries, suggesting that glass vessels could be used for Shuidouchi fermentation in functional food manufacturing.
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Affiliation(s)
- Huayi Suo
- College of Food Science, Southwest University, Chongqing 400715, China.
- Chongqing Engineering Research Center of Regional Food, Chongqing 400715, China.
| | - Xia Feng
- Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China.
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Kai Zhu
- Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China.
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Cun Wang
- Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China.
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Xin Zhao
- Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China.
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, China.
| | - Jianquan Kan
- College of Food Science, Southwest University, Chongqing 400715, China.
- Chongqing Engineering Research Center of Regional Food, Chongqing 400715, China.
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van Dijk PR, Landman GWD, van Essen L, Struck J, Groenier KH, Bilo HJG, Bakker SJL, Kleefstra N. The relationship between N-terminal prosomatostatin, all-cause and cardiovascular mortality in patients with type 2 diabetes mellitus (ZODIAC-35). BMC Endocr Disord 2015; 15:19. [PMID: 25880900 PMCID: PMC4404603 DOI: 10.1186/s12902-015-0009-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 03/13/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The hormone somatostatin inhibits growth hormone release from the pituitary gland and is theoretically linked to diabetes and diabetes related complications. This study aimed to investigate the relationship between levels of the stable somatostatin precursor, N-terminal prosomatostatin (NT-proSST), with mortality in type 2 diabetes (T2DM) patients. METHODS In 1,326 T2DM outpatients, participating in this ZODIAC prospective cohort study, Cox proportional hazards models were used to investigate the independent relationship between plasma NT-proSST concentrations with all-cause and cardiovascular mortality. RESULTS Median concentration of NT-proSST was 592 [IQR 450-783] pmol/L. During follow-up for 6 [3-10] years, 413 (31%) patients died, of which 176 deaths (43%) were attributable to cardiovascular causes. The age and sex adjusted hazard ratios (HRs) for all-cause and cardiovascular mortality were 1.48 (95%CI 1.14 - 1.93) and 2.21 (95%CI 1.49 - 3.28). However, after further adjustment for cardiovascular risk factors there was no independent association of log NT-proSST with mortality, which was almost entirely attributable to adjustment for serum creatinine. There were no significant differences in Harrell's C statistics to predict mortality for the models with and without NT-proSST: both 0.79 (95%CI 0.77 - 0.82) and 0.81 (95%CI 0.77 - 0.84). CONCLUSIONS NT-proSST is unsuitable as a biomarker for cardiovascular and all-cause mortality in stable outpatients with T2DM.
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Affiliation(s)
- Peter R van Dijk
- Isala, Diabetes Centre, P.O. box 10400, 8000 G.K, Zwolle, The Netherlands.
| | - Gijs W D Landman
- Isala, Diabetes Centre, P.O. box 10400, 8000 G.K, Zwolle, The Netherlands.
| | - Larissa van Essen
- Isala, Diabetes Centre, P.O. box 10400, 8000 G.K, Zwolle, The Netherlands.
| | | | - Klaas H Groenier
- Isala, Diabetes Centre, P.O. box 10400, 8000 G.K, Zwolle, The Netherlands.
- Department of General Practice, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
| | - Henk J G Bilo
- Isala, Diabetes Centre, P.O. box 10400, 8000 G.K, Zwolle, The Netherlands.
- Department of Internal Medicine, Isala, Zwolle, The Netherlands.
- Department of Internal Medicine, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
| | - Stephan J L Bakker
- Department of Internal Medicine, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
| | - Nanne Kleefstra
- Isala, Diabetes Centre, P.O. box 10400, 8000 G.K, Zwolle, The Netherlands.
- Department of Internal Medicine, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
- Langerhans Medical Research group, Zwolle, The Netherlands.
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14
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Li M, Liu R, Wang X, Li X, Qiang O, Yu T, Tang C. [Effects of octreotide on liver gluconeogenesis in obesity rats fed a high fat diet]. Wei Sheng Yan Jiu 2015; 44:270-275. [PMID: 25997232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To verify the effects of octreotide on liver gluconeogenesis in high fat diet-induced obesity rat. METHODS Male SD rats were randomly assigned to control (n = 16) and high-fat diet group (n = 40). After 24 weeks, obese rats selected from high-fat diet group were placed into obese group (n = 16) and octretide-treated group (n = 16). Rats in the octreotide-treated group were subcutaneously injected with octreotide per 12 h (40 mg/kg body weight) for 8 days. Body lengths, body weight, fasting plasma glucose (FPG), triglyceride (TG), total cholesterol (TC), fasting serum insulin and plasma somatostatin (SST) levels were measured. The Lee' s index and HOMA index were calculated. Expression of glucose-6-phosphatase (G6pase), phosphoenolpyruvate carboxykinase (Pepck) and forkhead box-containing protein 0 subfamily-1 (Foxol) mRNA were measured by RT-PCR. Foxol protein in nuclear and cytoplasm were quantified by western blotting. RESULTS Compared with control group, body weight, FPG, TG, TC, insulin and HOMA index in obese group were significantly increased. Octreotide treatment showed obviously reduced levels of the parameters. The plasma SST levels in the obese group tended to decrease compared with that in the control group (P >0. 05), while plasma SST levels was increased in the octreotide-treated group compared with that in the obese group (P <0. 05). Obese rats display more G6pase, Pepck and Foxol mRNA and higher ratio of nuclear Foxol protein to cytoplasm Foxol protein than control rats (P < 0. 01), whereas octreotide intervention reversed those changes (P <0. 01). CONCLUSION The administration of octreotide can ameliorate abnormal enhancement of hepatic gluconeogenesis, which might be attributed to the reduced activity and expression of Foxol and then decreased expression levels of G6pase and Pepck mRNA.
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Osadchuk MA, Burdina VO. [Irritable bowel syndrome with extraintestinal manifestations from a position of neuroendocrine pathology]. Eksp Klin Gastroenterol 2015:29-34. [PMID: 25993870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The aim of this study was to investigate the mechanism (s) of action of gastrointestinal hormones in the pathogenesis of irritable bowel syndrome (IBS), and the correlation between gastrointestinal hormones and psychological factors. Patients with IBS were divided into IBS with normal emotional state ratings and IBS in anxiety-depressive states groups. The two groups were then subdivided into IBS-constipation predominant (IBS-C) and IBS-diarrhea predominant (IBS-D) groups. Non-IBS patients with normal depression and anxiety ratings were recruited as controls. The expression of somatostatin (SS) and vasointestinalpeptid (VIP), motilin in the colonic mucosa was detected by immunohistochemistry and radioimmunoassay. The anxiety-depression scores of patients with IBS were significantly different from those of the control group. The expression levels of SS and VIP, motilin colonic mucosa of the patients with IBS were higher compared with those of the control.group. Furthermore, the expression level of SS in the IBS-C group demonstrated a significantly larger increase than that in the IBS-D group; however, there was no significant difference in the expression of VIP between the IBS-C and IBS-D groups. In addition, the expression levels of SS and VIP, motilin in the IBS groups with normal emotional state ratings were notably different from those in the IBS groups in anxiety-depressive states. Anxiety-depressive states may lead to changes in the secretion of SS and VIP, motilin, and subsequently to changes in gastrointestinal motility and function.
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Horváth K, Boros M, Bagoly T, Sándor V, Kilár F, Kemény A, Helyes Z, Szolcsányi J, Pintér E. Analgesic topical capsaicinoid therapy increases somatostatin-like immunoreactivity in the human plasma. Neuropeptides 2014; 48:371-8. [PMID: 25455106 DOI: 10.1016/j.npep.2014.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 10/02/2014] [Accepted: 10/07/2014] [Indexed: 01/26/2023]
Abstract
The aim of the present study was to evaluate the therapeutic potential of local capsaicinoid (EMSPOMA(®) cream) treatment on chronic low back pain in patients with degenerative spine diseases and to investigate the possible mechanism of action of the therapy. The qualitative and quantitative analyses of capsaicinoids in EMSPOMA(®) cream were performed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In the clinical study 20 patients with degenerative spine diseases were involved in a self-controlled examination. During the 21 day therapy they received 30 min daily treatment with capsaicinoid (EMSPOMA(®)) cream to the lumbar region of the back. The pain (VASs, Oswestry Disability Index) and the mobility of the lumbar region of the spine (Schober's, Domján's L and R test) were detected at baseline and at the end of the 1st, 2nd and 3rd weeks. The plasma level of somatostatin-like immunoreactivity (SST-LI) was measured by radioimmunoassay (RIA) before and after the treatment on the first and the last day of the therapy. Nonivamide (0.01%) was identified as the only capsaicinoid molecule in the cream. In the clinical study the 21 day local nonivamide treatment reduced the pain sensation. Oswestry Disability Index decreased from 39 ± 3.9% to 32.5 ± 4.4%. VASs showed 37.29%-59.51% improvement. In the plasma level of SST-LI threefold elevation was observed after the first nonivamide treatment. We conclude that nonivamide treatment exerts analgesic action in chronic low back pain and causes the release of the antinociceptive and anti-inflammatory neuropeptide somatostatin which may play pivotal role in the pain-relieving effect.
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Affiliation(s)
- Katalin Horváth
- Zsigmondy Vilmos Harkány Medicinal Spa Hospital, 1 Zsigmondy Street, Harkány 7815, Hungary
| | - Melinda Boros
- Department of Pharmacology and Pharmacotherapy, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary
| | - Teréz Bagoly
- Department of Pharmacology and Pharmacotherapy, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary
| | - Viktor Sándor
- MTA-PTE Molecular Interactions in Separation Science Research Group, 12 Szigeti Street, Pécs 7624, Hungary; Szentágothai Research Center, University of Pécs, 20 Ifjúság Street, Pécs 7624, Hungary
| | - Ferenc Kilár
- Department of Bioanalysis, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary; Szentágothai Research Center, University of Pécs, 20 Ifjúság Street, Pécs 7624, Hungary
| | - Agnes Kemény
- Department of Pharmacology and Pharmacotherapy, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary; Szentágothai Research Center, University of Pécs, 20 Ifjúság Street, Pécs 7624, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary; Szentágothai Research Center, University of Pécs, 20 Ifjúság Street, Pécs 7624, Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, 12 Szigeti Street, Pécs 7624, Hungary; Szentágothai Research Center, University of Pécs, 20 Ifjúság Street, Pécs 7624, Hungary.
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Abstract
The pathophysiology of diabetes as a disease is characterised by an inability to maintain normal glucose homeostasis. In type 1 diabetes, this is due to autoimmune destruction of the pancreatic β-cells and subsequent lack of insulin production, and in type 2 diabetes it is due to a combination of both insulin resistance and an inability of the β-cells to compensate adequately with increased insulin release. Animal models, in particular genetically modified mice, are increasingly being used to elucidate the mechanisms underlying both type 1 and type 2 diabetes, and as such the ability to study glucose homeostasis in vivo has become an essential tool. Several techniques exist for measuring different aspects of glucose tolerance and each of these methods has distinct advantages and disadvantages. Thus the appropriate methodology may vary from study to study depending on the desired end-points, the animal model, and other practical considerations. This review outlines the most commonly used techniques for assessing glucose tolerance in rodents and details the factors that should be taken into account in their use. Representative scenarios illustrating some of the practical considerations of designing in vivo experiments for the measurement of glucose homeostasis are also discussed.
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Affiliation(s)
- James E Bowe
- Diabetes Research GroupDivision of Diabetes and Nutritional Sciences, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Zara J Franklin
- Diabetes Research GroupDivision of Diabetes and Nutritional Sciences, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Astrid C Hauge-Evans
- Diabetes Research GroupDivision of Diabetes and Nutritional Sciences, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Aileen J King
- Diabetes Research GroupDivision of Diabetes and Nutritional Sciences, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Shanta J Persaud
- Diabetes Research GroupDivision of Diabetes and Nutritional Sciences, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Peter M Jones
- Diabetes Research GroupDivision of Diabetes and Nutritional Sciences, King's College London, Guy's Campus, London SE1 1UL, UK
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Yavropoulou MP, Kotsa K, Pikilidou M, Keisisoglou I, Yovos JG. Effects of intracerebroventricular infusion of somatostatin-14 on peripheral glucoregulation in dogs. J Neuroendocrinol 2014; 26:11-7. [PMID: 24325321 DOI: 10.1111/jne.12124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 10/31/2013] [Accepted: 12/06/2013] [Indexed: 11/30/2022]
Abstract
Somatostatin (SST) is an inhibitory hormone that regulates numerous biological processes and circulates in two bioactive isoforms: SST-14 and SST-28. SST-14 is the predominant form in the hypothalamus and regulates the secretion of growth hormone (GH) (directly) and of thyroid-stimulating hormone (indirectly). In the periphery, SST is a potent inhibitor of glucagon and insulin secretion. In the present study, we aimed to investigate the effect of i.c.v. administration of SST-14 on glucose metabolism. Twenty healthy adult dogs randomly received either a bolus i.c.v. infusion of 5, 25 or 50 μg of SST-14 or an equivalent amount of artificial cerebrospinal fluid through an epicranial apparatus during fasting. The same experiment was repeated during concomitant intraduodenal infusion of glucose solution through a Mann-Bollman fistula. Serum levels of glucose, insulin and glucose-dependent insulinotrophic peptide (GIP), plasma SST and serum GH levels were assayed. Circulating levels of SST and GH did not change significantly during i.c.v. infusions. Bolus infusion of 50 μg of SST-14 produced an increase in serum glucose levels at 10 min (94 ± 2.5 mg/dl at baseline versus 101 ± 3 mg/dl, P = 0.04) and significantly suppressed insulin levels, reaching maximal suppression at 60 min after infusion (9 ± 1.3 μIU/ml at baseline versus 4.6 ± 0.5 μIU/ml P = 0.04) in fasting animals. Similar results were obtained during intraduodenal infusion of glucose through a Mann-Bollman fistula. GIP levels did not change significantly during i.c.v. administration of SST-14. Intracerebroventricular infusion of SST-14 increases glucose and suppresses insulin levels in the periphery independently of circulating SST levels.
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Affiliation(s)
- M P Yavropoulou
- Department of Endocrinology and Metabolism, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Astruc B, Marbach P, Bouterfa H, Denot C, Safari M, Vitaliti A, Sheppard M. Long-Acting Octreotide and Prolonged-Release Lanreotide Formulations Have Different Pharmacokinetic Profiles. J Clin Pharmacol 2013; 45:836-44. [PMID: 15951474 DOI: 10.1177/0091270005277936] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Single-dose pharmacokinetic (PK) profiles and multiple-dose PK modeling were compared for long-acting octreotide (20 or 60 mg) and prolonged-release lanreotide (90 or 120 mg) over 91 days; steady-state profiles were simulated. All treatments were well tolerated. Octreotide 20-mg profile showed increased concentration on day 1, lag from days 2 to 6, then prolonged plateau phase (days 11-41); 60-mg PK was dose proportional. Lanreotide 90-mg profile showed C(max) on day 1 then elimination (apparent t1/2 25.5 days); 120-mg profile was underproportional. Steady-state PK of octreotide 20 mg/28 d suggested a C(mean) of 1216 rhog/mL (range, 1065-1585) with low fluctuation index (43%). Steady-state PK of lanreotide 90 mg/28 d suggested a C(mean) of 4455 rhog/mL (range, 2499-9279) with high fluctuation index (152%). Long-acting octreotide had more predictable PK than prolonged-release lanreotide. Simulated steady-state profiles suggest long-acting octreotide could be optimized to meet individual patient needs. In contrast, prolonged-release lanreotide requires exposure constantly above the therapeutic target to enable monthly long-term therapy.
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Wang R, Yang F, Wu H, Wang Y, Huang Z, Hu B, Zhang M, Tang C. High-dose versus low-dose octreotide in the treatment of acute pancreatitis: a randomized controlled trial. Peptides 2013; 40:57-64. [PMID: 23275042 DOI: 10.1016/j.peptides.2012.12.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 12/18/2012] [Accepted: 12/18/2012] [Indexed: 02/07/2023]
Abstract
To evaluate the therapeutic efficacy of high-dose octreotide in patients with predicted severe acute pancreatitis (SAP) or SAP, two hundred and thirty-six patients with predicted SAP and 136 patients with SAP were randomized into control, high-dose octreotide (High-O) and low-dose octreotide (Low-O) groups. In addition to the conventional managements administrated in control group, High-O group received an intravenous infusion of octreotide at 50 μg/h × 3d + 25 μg/h × 4d, and Low-O group received octreotide at 25 μg/h × 7d. The major primary outcomes included the numbers of predicted SAP patients which developed SAP after intervention and the number of patients with SAP amelioration. Secondary outcomes included APACHE II, SIRS scores, plasma levels of somatostatin (SST), tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6). There were no significant differences between the control and Low-O groups in terms of prevention and treatment for SAP. The incidence of SAP in patients with predicted SAP who received High-O was significantly lower than the Low-O group: 37.5% vs. 59.8%, p=0.005. Compared with Low-O group, the number of SAP patients in the SAP arm in the High-O group was reduced by 29.8%. Plasma levels of SST in both predicted SAP and the SAP patients were efficiently recovered (from 132.71±31.40 pg/ml to 180.00±23.50 pg/ml, p<0.05) after high-dose octreotide supplementation, which concomitantly reduced TNF-α and IL-6 levels. High-dose octreotide administration within 48h after AP onset may efficiently reduce the risk of SAP developing and partly attenuate SAP through raising plasma SST to a normal level and decreasing IL-6 and TNF-α.
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Affiliation(s)
- Rui Wang
- Department of Gastroenterology, West China Hospital, Sichuan University, PR China.
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21
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Xin-Xin C, Yu-Xian C. [Effects of Xingpi Yang'er granule on serum gastrin, plasma motilin, and somatostatin contents in children patients with pneumonia induced diarrhea]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2013; 33:155-158. [PMID: 23646465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE To observe the effects of Xingpi Yang'er Granule (XYG) on serum gastrin (GAS), plasma motilin (MOT), and somatostatin (SS) in children patients with pneumonia induced diarrhea. METHODS Recruited were 120 children inpatients with pneumonia induced diarrhea at the Department of Pediatrics, Liaocheng People's Hospital from June 2011 to June 2012. They were randomly assigned to two groups, the treatment group and the control group, 60 in each group. Those in the treatment group were treated with XYG, while those in the control group were treated with Live Combined Bifidobacterium and Lactobacillus Tablets. Besides, 30 healthy children who received physical examinations at our hospital were recruited as the healthy control group. The clinical efficacy, changes of GAS, MOT, and SS contents were observed. RESULTS The total effective rate was 95.0% in the treatment group and 93.3% in the control group, showing no statistical difference (P > 0.05). Compared with healthy control group, the GAS and MOT contents increased, and SS decreased before treatment in the other two groups (P < 0.05). Compared with the same group before treatment, GAS and MOT contents obviously decreased, and SS increased in the other two groups after treatment (P<0.05). Compared with the control group at the same time point, GAS and MOT decreased, and SS increased in the treatment group after treatment, showing statistical differences (P < 0.05). CONCLUSIONS The levels of GAS, MOT, and SS were obviously changed in children patients with pneumonia induced diarrhea. XYG had obvious regulation on their GAS, MOT and SS contents.
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Affiliation(s)
- Chen Xin-Xin
- Department of Pediatrics, Liaocheng People's Hospital, Shandong (252000), China
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Yang F, Wu H, Li Y, Li Z, Wang C, Yang J, Hu B, Huang Z, Ji R, Zhan X, Xie H, Wang L, Zhang M, Tang C. Prevention of severe acute pancreatitis with octreotide in obese patients: a prospective multi-center randomized controlled trial. Pancreas 2012; 41:1206-12. [PMID: 23086244 DOI: 10.1097/mpa.0b013e3182523bdf] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES To evaluate the efficacy of octreotide in preventing severe acute pancreatitis (SAP) in obese patients. METHODS A prospective multi-center partly randomized control trial was conducted in patients with mild acute pancreatitis (AP). Nonobese patients received conventional management (nonobese-C, n = 82), whereas obese patients (body mass index ≥ 25 kg/m(2)) were randomized into 2 groups: obese-C (n = 79), who received conventional management, and obese-C+O (n = 82), who received conventional management plus intravenous infusion of octreotide, 50 μg/h for 72 hours. RESULTS The risk ratio and relative risk reduction in the development of SAP in the obese-C+O group were 0.27 (95% confidence interval, 0.10-0.69) and 0.73 (95% confidence interval, 0.31-0.90), respectively. The number of cases developing local complications in the obese-C+O group was significantly smaller than that in the obese-C group: 4.9% vs 19%, P = 0.006. The plasma level of somatostatin in the obese-C+O group was significantly higher than that in the obese-C group: 165.5 ± 42.6 vs 112.1 ± 24.86 pg/mL, P < 0.05. Supplement of octreotide also accompanied with reduction in plasma levels of tumor necrosis factor α and IL-6. CONCLUSIONS Intravenous administration of octreotide (50 μg/h) for 72 hours in the early stage of AP could prevent the development of SAP effectively in obese patients by raising plasma somatostatin to a normal level and reducing circulating cytokines.
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Affiliation(s)
- Fan Yang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
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Kehlenbrink S, Koppaka S, Martin M, Relwani R, Cui MH, Hwang JH, Li Y, Basu R, Hawkins M, Kishore P. Elevated NEFA levels impair glucose effectiveness by increasing net hepatic glycogenolysis. Diabetologia 2012; 55:3021-8. [PMID: 22847060 PMCID: PMC6317075 DOI: 10.1007/s00125-012-2662-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 06/29/2012] [Indexed: 01/13/2023]
Abstract
AIMS/HYPOTHESIS Acute hyperglycaemia rapidly suppresses endogenous glucose production (EGP) in non-diabetic individuals, mainly by inhibiting glycogenolysis. Loss of this 'glucose effectiveness' contributes to fasting hyperglycaemia in type 2 diabetes. Elevated NEFA levels characteristic of type 2 diabetes impair glucose effectiveness, although the mechanism is not fully understood. Therefore we examined the impact of increasing NEFA levels on the ability of hyperglycaemia to regulate pathways of EGP. METHODS We performed 4 h 'pancreatic clamp' studies (somatostatin; basal glucagon/growth hormone/insulin) in seven non-diabetic individuals. Glucose fluxes (D-[6,6-(2)H(2)]glucose) and hepatic glycogen concentrations ((13)C magnetic resonance spectroscopy) were quantified under three conditions: euglycaemia, hyperglycaemia and hyperglycaemia with elevated NEFA (HY-NEFA). RESULTS EGP was suppressed by hyperglycaemia, but not by HY-NEFA. Hepatic glycogen concentration decreased ~14% with prolonged fasting during euglycaemia and increased by ~12% with hyperglycaemia. In contrast, raising NEFA levels in HY-NEFA caused a substantial ~23% reduction in hepatic glycogen concentration. Moreover, rates of gluconeogenesis were decreased with hyperglycaemia, but increased with HY-NEFA. CONCLUSIONS/INTERPRETATION Increased NEFA appear to profoundly blunt the ability of hyperglycaemia to inhibit net glycogenolysis under basal hormonal conditions.
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Affiliation(s)
- S Kehlenbrink
- Division of Endocrinology, Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA
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Beglinger C, Hu K, Wang Y, Bouillaud E, Darstein C, Wang Y, Mohideen P. Multiple once-daily subcutaneous doses of pasireotide were well tolerated in healthy male volunteers: a randomized, double-blind, placebo-controlled, cross-over, Phase I study. Endocrine 2012; 42:366-74. [PMID: 22527887 DOI: 10.1007/s12020-012-9668-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 03/28/2012] [Indexed: 12/26/2022]
Abstract
A randomized, double-blind, placebo-controlled, cross-over, dose-escalating, single-center study was conducted to evaluate the safety, tolerability, and pharmacokinetic (PK) profile of multiple once-daily (qd) subcutaneous (sc) doses of pasireotide in healthy male subjects. Subjects received pasireotide 50, 200, or 600 μg sc qd for 14 days and placebo in separate sequences. Thirty-three subjects were randomized. The most frequently reported drug-related adverse events were injection-site reactions (n = 18), diarrhea (n = 14) and nausea (n = 10), which were mostly mild or moderate in intensity. Pasireotide 600 μg sc was associated with pre- and post-prandial elevations in glucose levels relative to placebo; however, this effect was less pronounced on day 14 compared with day 1. PK steady state appeared to be achieved after 3 days of dosing and PK exposures had a moderate accumulation of 20-40 % across doses. Pasireotide demonstrated fast absorption (T(max,ss): 0.25-0.5 h), low clearance (CL/F(ss): 8.10-9.03 L/h), long effective half-life (T(½,eff): ~12 h, on average between 9.7 and 13.1 h for 50, 200, and 600 μg sc qd), and large volume of distribution (V(z)/F(ss): 251-1,091 L) at steady state. Dose proportionality was confirmed for C(max,ss); other PK parameters (C(max), AUC(0-24 h) and AUC(tau)) were approximately dose proportional. Growth hormone inhibition was observed with pasireotide 200 and 600 μg sc qd. Gallbladder volume increased post-prandially with pasireotide 200 and 600 μg sc qd, which appeared to correlate with reduced levels of cholecystokinin at these doses. Pasireotide was generally well tolerated up to the tested dose of 600 μg qd, with a linear and time-independent PK profile after sc qd dosing in healthy subjects.
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Affiliation(s)
- Christoph Beglinger
- Division of Gastroenterology, University Hospital Basel, Basel, Switzerland.
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Szilvássy Z, Németh J, Kovács P, Paragh G, Sári R, Vígh L, Peitl B. Insulin resistance occurs in parallel with sensory neuropathy in streptozotocin-induced diabetes in rats: differential response to early vs late insulin supplementation. Metabolism 2012; 61:776-86. [PMID: 22154324 DOI: 10.1016/j.metabol.2011.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 10/16/2011] [Accepted: 10/17/2011] [Indexed: 12/31/2022]
Abstract
We investigated whether progressive sensory neuropathy was accompanied by changes in whole-body insulin sensitivity (WBIS) in rats made diabetic by streptozotocin (STZ). The effects of early and late insulin supplementation were also studied. The STZ-treated rats failed to gain weight and exhibited stable hyperglycemia and low plasma insulin levels with a decrease in nerve conduction velocity (NCV) measured in A and C fibers of the saphenous nerve. A decreased sensory neuropeptide (SNP) release such as that of substance P, somatostatin, and calcitonin gene-related peptide determined from organ fluid of tracheal preparations subjected to electrical field stimulation also occurred in diabetic animals. These features were accompanied by a decrease in WBIS measured by hyperinsulinemic-euglycemic glucose clamping and a decrease in insulin-stimulated glucose uptake in cardiac and gastrocnemius muscle. When insulin supplementation with slow-release implants (2 IU/d) was started 4 weeks after STZ injection, blood glucose level normalized. Both insulin sensitivity and sensory nerve function reflected in either NCV or SNP release completely recovered by the 12th post-STZ week. When the insulin implants were applied from the eighth post-STZ week, both WBIS and glucose uptake remained significantly decreased, with a seriously impaired NCV and SNP release with strong hyperglycemia. Late insulin supplementation, however, even by using double implantation from the 10th post-STZ week, was unable to restore blood glucose, WBIS, NCV, and SNP release by the 12th week. Insulin resistance occurs in parallel with sensory neuropathy in STZ-diabetic rats. Both can be improved by early but not late insulin supplementation.
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Affiliation(s)
- Zoltán Szilvássy
- Departments of Pharmacology and Pharmacotherapy, University of Debrecen, H-4032, Debrecen, Hungary
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Lemamy GJ, Guillaume V, Ndéboko B, Mouecoucou J, Oliver C. Substance P stimulates Growth Hormone (GH) and GH-Releasing Hormone (GHRH) secretions through tachykinin NK2 receptors in sheep. Peptides 2012; 35:60-4. [PMID: 22450468 DOI: 10.1016/j.peptides.2012.03.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Revised: 03/10/2012] [Accepted: 03/10/2012] [Indexed: 10/28/2022]
Abstract
Substance P is ubiquitous undecapeptide belonging to the tachykinins family. It has been found in the hypothalamus and is involved in the hypothalamo-hypophysial axis in several mammals, including human. Previous studies have shown that substance P increases GH secretions in rats and human. In this study, we have shown that intravenously infused substance P in sheep caused an increased level of Growth Hormone (GH) and GH-Releasing Hormone (GHRH), and decreased Somatotropin Release Inhibiting Hormone (SRIH) secretions. GH was obtained from peripheral blood. GHRH and SRIH were directly collected from hypophysial portal blood, using a trans-nasal surgery technique in a vigil sheep that allowed accessing to hypothalamo-hypophysial portal vessels. Hormones assays were performed by radioimmunoassay (RIA). Moreover, we showed that substance P-induced GH and GHRH secretion appears to be mediated by NK2 tachykinin receptors, since it is specifically blocked by a non peptidic tachykinin NK2 receptor antagonist (SR48968, Sanofi, Montpellier, France) whereas a non peptidic tachykinin NK1 antagonist (SR140333, Sanofi, Montpellier, France) failed to modify GH and GHRH hormones secretions.
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Affiliation(s)
- Guy-Joseph Lemamy
- University of Aix-Marseille and Institut National de la Santé Et de la Recherche Médicale (INSERM) U 297, Laboratory of Experimental Neuroendocrinology, Boulevard P. Dramard, 13916 Marseille cedex 20, France.
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Maintz L, Wardelmann E, Walgenbach K, Fimmers R, Bieber T, Raap U, Novak N. Neuropeptide blood levels correlate with mast cell load in patients with mastocytosis. Allergy 2011; 66:862-9. [PMID: 21284654 DOI: 10.1111/j.1398-9995.2011.02550.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Mastocytosis is characterized by abnormal growth and accumulation of mast cells (MCs) in different organs. MCs have been shown to express receptors for neuropeptides. Furthermore, neuropeptides can activate MCs inducing cytokine production and MC mediator release, which further contribute to MC chemotaxis and stimulate the release of vasoactive peptides from sensory nerves. Thus, a contribution of neuropeptides to mastocytosis seems highly conceivable, but has not been investigated sufficiently yet. This study aimed to analyse blood levels of the neuropeptides substance P (SP), somatostatin (SST), vasoactive intestinal peptide (VIP), calcitonine gene--related peptide (CGRP) and expression of the SP receptor NK-1R in the skin of patients with mastocytosis (n = 46) compared to healthy controls (n = 69). METHODS Substance P, SST, VIP and CGRP plasma levels were analysed by ELISA, serum tryptase levels with the UniCAP System and NK-1R expression in the skin by immunohistochemistry. RESULTS Plasma levels of SP (P < 0.0001), SST, (P = 0.007), VIP (P < 0.0001) and CGRP (P = 0.003) were significantly increased in patients with mastocytosis compared to controls. Tryptase serum levels correlated significantly with neuropeptide levels, implying a link between MC load and neuropeptide blood levels in mastocytosis. NK-1R was expressed on the majority of MCs, and NK-1R-positive cells were increased in lesional mastocytosis skin compared to control skin (P = 0.01). CONCLUSIONS Elevated blood levels of the neuropeptides SP, SST, VIP and CGRP correlate with MC load and together with an increased expression of NK-1R in the skin of patients with mastocytosis indicate a role of neuropeptides in the pathophysiology of mastocytosis.
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Affiliation(s)
- L Maintz
- Department of Dermatology and Allergy, University of Bonn, Bonn, Germany
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Yang R, Li W, Shi Y, Le G. [Analysis of correlation between serum somatostatin levels, antioxidant index and metabolic syndrome]. Wei Sheng Yan Jiu 2011; 40:466-471. [PMID: 21861349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To investigate serum somatostatin levels, antioxidant index in metabolic syndrome (MS). METHODS Serum somatostatin levels, glucose, lipid level and certain antioxidant indexes were measured in the serum of 39 patients with MS, 60 MS high risk subjects (MSR) and 41 normal controls (NC). The associations of somatostatin with atherosclerotic index (AI), HOMA-IR and malondialdehyde (MDA) were analyzed. RESULTS (1) Median somatostatin levels were lower in subjects with MS or MSR than in control subjects. (2) The activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) decreased in subjects with MS or MSR compared with NC (P < 0.05). (3) A significant inverse relationships between somatostatin level and AI (r = -0.24, P < 0.01), HOMA-IR (r = -0.23, P < 0.05), and MDA (r = -0.25, P < 0.01) were observed. CONCLUSIONS The severity of serum glucose and lipid disorders and oxidative stress was accompanied with decreased somatostatin levels. These results suggest a possible role of decreased somatostatin on MS generation.
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Affiliation(s)
- Ruili Yang
- The Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
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Falkén Y, Hellström PM, Holst JJ, Näslund E. Changes in glucose homeostasis after Roux-en-Y gastric bypass surgery for obesity at day three, two months, and one year after surgery: role of gut peptides. J Clin Endocrinol Metab 2011; 96:2227-35. [PMID: 21543426 DOI: 10.1210/jc.2010-2876] [Citation(s) in RCA: 234] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
CONTEXT Endocrine effects of gastric bypass (GBP) surgery for obesity on glucose homeostasis are not fully understood. MAIN OBJECTIVE The main objective of the study was to assess the changes in plasma glucose, insulin, glucagon-like peptide-1 (GLP-1), leptin, somatostatin, glucose-dependent insulinotropic peptide, enteroglucagon, and glucagon early after GBP. METHOD Twelve obese subjects (body mass index 45.3 ± 1.9 kg/m(2)) were subjected to a liquid meal without lipids before and 3 d, 2 months, and 1 yr after GBP. Plasma concentrations of glucose, insulin, leptin, and gut peptide hormones were assessed before and for 180 min after the meal. Satiety was measured with visual analog scales. The absorption rate of acetaminophen added to the liquid meal was measured. Insulin resistance was measured by the homeostasis model assessment of insulin resistance. RESULTS All subjects lost weight (body mass index 30.3 ± 1.8 kg/m(2) at 1 yr). Fasting glucose was significantly lower on d 3 (P < 0.05). There was a progressive decrease in the homeostasis model assessment of insulin resistance after 2 months postoperatively. Postprandially, there was a progressive rise of GLP-1 and enteroglucagon and a transient increase in pancreatic glucagon release over the study period. There was a leftward shift of the time course of plasma glucose and insulin. Somatostatin release was lower on d 3 (P < 0.05) but then unchanged. The absorption rate of acetaminophen was twice as fast after GBP compared with before surgery and did not change over time. Satiety scores increased markedly postoperatively. CONCLUSION Both enhanced insulin sensitivity and incretin hormones, such as GLP-1, contribute to the early control of glucose homeostasis. Progressively increasing postprandial levels of enteroglucagon (oxyntomodulin) and GLP-1 facilitate weight loss and enhance insulin effectiveness.
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Affiliation(s)
- Y Falkén
- Division of Surgery, Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, SE-182 88 Stockholm, Sweden.
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Mihaljević S, Katicić M, Krznarić Z, Dmitrović B, Karner I, Stefanić M, Pinotić L, Samardzija M, Bensić M. The influence of the different morphological changes on gastric mucosa on somatostatin cell number in antrum mucosa and serum somatostatin. Coll Antropol 2011; 35:5-8. [PMID: 21661347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The aim of our paper was to investigate the influence of the different morphological changes on gastric mucosa on somatostatin D-cell number in antral mucosa and serum Somatostatin. We analyzed according to Sydney classification to what extent the severity of gastritis affect the observed hormonal values. somatostatin D-cell number in antral mucosa and serum Somatostatin values were compared between three groups of patients; mild, moderate and severe chronic gastritis. The average number of somatostatin cell in biopsy sample of antrum mucosa was 30.41 +/- 35.38 (N = 17) in the case of middle form, 18.69 +/- 26.65 (N = 56) in moderate and in severe case of chronic gastritis 5.23 +/- 5.93 (N = 7) cells in mm2 of mucosa. The level of somatostatin in the serum of middle form gastritis were 26.43 +/- 28.76, moderate 19.95 +/- 35.93 and severe 17.88 +/- 17.66 pg/mL. In order to determine the number of somatostatin cells in antrum mucosa and serum somatostatin with present morphological changes of mucosa, it might helpful to exclude the patients with non-ulcer dyspepsia, but with the higher risk of premalignant and malignant changes.
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Affiliation(s)
- Silvio Mihaljević
- J J Strossmayer University, Osijek University Hospital Center, Department of Gastroenterology and Hepatology, Osijek, Croatia.
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Yang RL, Li W, Yue P, Shi YH, Le GW. Relation of plasma somatostatin levels with malondialdehyde in hyperlipidemic patients. Asia Pac J Clin Nutr 2011; 20:220-224. [PMID: 21669591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Somatostatin (SST) may protect organism from overnutrition-induced insulin resistance and oxidative stress by inhibiting pancreatic endocrine and exocrine secretion, gastrointestinal digestion and absorption. Many studies clearly show its release becomes perturbed in diabetes and obesity. Therefore, in the present study we first aimed to investigate whether or not plasma somatostatin level was different in patients with hyperlipidemia and normolipidemic controls. We also assessed the relationship between plasma somatostatin levels with atherosclerotic index (AI) and malondialdehyde (MDA) in non-diabetic dyslipidemic patients. Subjects with hyperlipidemia have insulin resistance and high levels of oxidative stress. Median somatostatin (57.2±19.2 vs 68.0±21.9 pg/mL; p<0.05) levels were lower in hyperlipidemic than in normolipidemic subjects. Significant inverse relationships between SST level and AI (r=-0.21, p< 0.05), or MDA (r=-0.31, p<0.01) were observed. These results suggest a possible protective role of endogenous SST, at least on hyperlipidemia and atherosclerosis that are attributed to excess energy intake and physical inactivity. Of course these preliminary results should be supported by prospective studies.
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Affiliation(s)
- Rui-Li Yang
- State key lab of food science and technology, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, Jiangsu Province, China
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Xu G, Li Y, An W, Zhao J, Xiang X, Ding L, Li Z, Guan Y, Wang X, Tang C, Zhu Y, Wang N, Li X, Mulholland M, Zhang W. Regulation of gastric hormones by systemic rapamycin. Peptides 2010; 31:2185-92. [PMID: 20804797 PMCID: PMC2995266 DOI: 10.1016/j.peptides.2010.08.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Revised: 08/20/2010] [Accepted: 08/20/2010] [Indexed: 12/29/2022]
Abstract
The mammalian target of rapamycin (mTOR), an evolutionarily conserved serine-threonine kinase, is an intracellular fuel sensor critical for cellular energy homeostasis. Gastrointestinal endocrine cells play a vital role in the regulation of energy balance by secreting hormones that inform the brain about energy supply. Here we showed the localization of mTOR signaling molecules in more than 90% of gastric ghrelin cells and 36±3% of gastrin cells, while no somatostatin-positive cell showed phospho-S6K1 immunoreactivity. Inhibition of mTOR significantly stimulated expression of gastric ghrelin mRNA and protein, and the concentration of plasma ghrelin (2.06±0.34 ng/ml vs. 12.53±3.9 ng/ml, p<0.05), inhibited gastrin synthesis and secretion (75.01±6.71 pg/ml vs. 54.04±3.65 pg/ml, p<0.05), but had no effect on somatostatin production (165.2±25.07 pg/ml vs. 178.9±29.14 pg/ml, p=0.73). Gastric mTOR is a gastric sensor whose activity is linked to the differential regulation of gastric hormone production and release.
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Affiliation(s)
- Geyang Xu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Yin Li
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Wenjiao An
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Jing Zhao
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Xinxin Xiang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Li Ding
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Ziru Li
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Youfei Guan
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Xian Wang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Chaoshu Tang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Yi Zhu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Nanping Wang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
| | - Xiaoying Li
- Shanghai Institute of Endocrinology and Metabolism and Chinese-French Laboratory of Genomics and Life Sciences, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - Michael Mulholland
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI 48109-0346, USA
- Corresponding author: Weizhen Zhang, Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China, Tel: 0086-10-82802183; Fax: 0086-10-82802183; Or Michael W. Mulholland, Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI 48109-0346, USA, Tel: 734-936-3236;
| | - Weizhen Zhang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI 48109-0346, USA
- Corresponding author: Weizhen Zhang, Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing 100191, China, Tel: 0086-10-82802183; Fax: 0086-10-82802183; Or Michael W. Mulholland, Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI 48109-0346, USA, Tel: 734-936-3236;
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Saito H, Hosoi E, Sano T. [Somatostatin]. Nihon Rinsho 2010; 68 Suppl 7:203-207. [PMID: 20963866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Suto B, Bagoly T, Borzsei R, Lengl O, Szolcsanyi J, Nemeth T, Loibl C, Bardonicsek Z, Pinter E, Helyes Z. Surgery and sepsis increase somatostatin-like immunoreactivity in the human plasma. Peptides 2010; 31:1208-12. [PMID: 20307604 DOI: 10.1016/j.peptides.2010.03.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 03/10/2010] [Accepted: 03/10/2010] [Indexed: 11/26/2022]
Abstract
We have previously shown in animals that somatostatin released from capsaicin-sensitive afferents in response to inflammation and tissue damage exerts systemic anti-nociceptive and anti-inflammatory actions. Since peptidergic sensory innervation of the airways and the joints are particularly dense, we aimed at investigating the alterations of plasma somatostatin-like immunoreactivity (SST-LI) in response to thoracic and orthopedic surgery, as well as sepsis. Thoracotomy, video-assisted thoracoscopy, hip and knee endoprosthesis were performed under general anesthesia. Blood was taken before, during and after the surgical procedures, as well as at admission and every consecutive morning from septic patients receiving exclusively total parenteral nutrition. SST-LI was determined from the plasma with specific and sensitive radioimmunoassay developed in our laboratory. Plasma SST-LI in healthy volunteers and preoperatively was 8-12fmol/ml. Both thoracotomy and thoracoscopy significantly increased SST-LI by 55-60% at the end of the procedures when the thoracic cavity and the skin were closed. Hip endoprosthesis implantation elevated SST-LI by 30% after skin incision, which increased further to 55% by the time the surgery was completed. In contrast, knee operations performed under tourniquet did not alter SST-LI in the systemic circulation. SST-LI was almost 3-fold higher in the plasma of septic patients than in healthy volunteers. This human study revealed that thoracic/hip surgery and sepsis elevate SST-LI in the systemic circulation, presumably by inducing its release from sensory fibres. It is concluded, that the endogenous protective mechanism mediated by neural somatostatin, which has been evidenced in animals, is likely to operate in patients.
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Affiliation(s)
- Balazs Suto
- Department of Anesthesiology and Intensive Therapy, Faculty of Medicine, University of Pecs, Ifjusag str. 13, H-7624 Pecs, Hungary
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Katagiri F, Inoue S, Sato Y, Itoh H, Takeyama M. Ecabet sodium raises plasma levels of calcitonin gene-related peptide and substance P in healthy humans. J Pharm Pharmacol 2010; 57:799-805. [PMID: 15969937 DOI: 10.1211/0022357056271] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Ecabet sodium (ecabet), a cytoprotective drug, produces an increase in mucosal blood flow. One of the gastrointestinal motility regulatory factors has been assumed to be the induction of changes in the levels of peptides (gastrin, somatostatin and motilin) in plasma. On the other hand, recently, capsaicin-sensitive afferent nerves were shown to play an important role in gastric mucosal defensive mechanism. Capsaicin stimulates afferent nerves and enhances the release of calcitonin gene-related peptide (CGRP) and substance P in the stomach. We studied the effect of ecabet on human plasma gastrin-, somatostatin-, motilin-, CGRP- and substance P-like immunoreactive substance (IS) in healthy subjects. Ecabet sodium at a dose of 3.0 g, or placebo, was orally administered in five healthy males. The blood samples were taken before and at 20, 40, 60, 90, 120, 180 and 240 min after administration, subjected to extracting procedures, and submitted to a highly sensitive enzyme immunoassay system. Single administration of ecabet caused significant (P < 0.05) increases in plasma CGRP-, substance P- and somatostatin-IS concentration compared with placebo. Ecabet significantly decreased plasma gastrin-IS levels compared with placebo. In this study, we hypothesized that ecabet might stimulate capsaicin-sensitive afferent nerves indirectly and improve mucosal blood flow; this might be a key mechanism underlying its gastroprotective action.
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Affiliation(s)
- Fumihiko Katagiri
- Department of Clinical Pharmacy, Oita University Hospital, Hasama-machi, Oita 879-5593, Japan.
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Guilloteau P, Chayvialle JA, Toullec R, Grongnet JF, Bernard C. Early-Life Patterns of Plasma Gut Regulatory Peptide Levels in Calves: Effects of the First Meals. Neonatology 2009; 61:103-9. [PMID: 1348958 DOI: 10.1159/000243537] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The effects of the first meals on the release of seven gut regulatory peptides were studied in newborn calves fed colostrum either at serial intervals during the first day of life or at 28 h only. Fasted animals showed no significant variation of plasma peptides until the first feed, except for somatostatin, which peaked at 4-5 h and declined thereafter. As assessed before and 1 h after feeding, the first meal tended to induce rises in plasma gastrin, cholecystokinin and pancreatic polypeptide, while the other peptides were unaffected. Repeated colostrum feeds induced marked increases in plasma gastrin, cholecystokinin, secretin and vasoactive intestinal peptide from 10 h on. Pancreatic polypeptide was transiently increased from 4 to 16 h. Feeding was followed by a transitory reduction of plasma somatostatin and by a prolonged decrease of plasma motilin. We conclude that colostrum feeding potently modulates the release of several regulatory peptides shortly after birth in calves. These responses may be important for the adaptation of gut growth, secretions and motility to food ingestion in the neonatal period.
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Affiliation(s)
- P Guilloteau
- Laboratoire du Jeune Ruminant, INRA, Rennes, France
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Veldhuis JD, Hudson SA, Bailey JN, Erickson D. Regulation of basal, pulsatile, and entropic (patterned) modes of GH secretion in a putatively low-somatostatin milieu in women. Am J Physiol Endocrinol Metab 2009; 297:E483-9. [PMID: 19491298 PMCID: PMC2724111 DOI: 10.1152/ajpendo.00136.2009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Somatostatin (SS) released by hypothalamic neurons inhibits GH exocytosis noncompetitively. Therefore, we postulated that attenuation of GH feedback-induced SS outflow would help to unmask covariates of endogenous secretagogue drive. To this end, 42 healthy pre- and postmenopausal women were randomly assigned to receive leuprolide plus estradiol (E(2)) or leuprolide plus placebo. A putatively low-SS milieu was imposed by L-arginine infusion. Deconvolution and regularity analyses were applied to 6-h GH concentration-time profiles. By two-way ANOVA, age negatively (P < 0.001) and E(2) positively (P = 0.001) determined pulsatile GH secretion in the presumptively SS-deficient milieu (P < 0.001). Comparable effects were exerted on the mass of GH secreted per burst per unit distribution volume (age P = 0.001, E(2) P < 0.001, overall P < 0.001). E(2) alone predicted basal (nonpulsatile) GH secretion (P = 0.004). Stepwise forward-selection multivariate regression demonstrated that age (P = 0.0017) and E(2) (P = 0.0002) together explained 46% of intersubject variability in pulsatile GH secretion (P < 0.001) and fully replaced the negative univariate effect of abdominal visceral fat (r(2) = 0.32, P < 0.001). Moreover, age and E(2) (but not AVF) interacted to supervise GH regularity (P = 0.007). We conclude that age and E(2) availability individually and together constitute primary predictors of basal, pulsatile, and patterned GH secretion in an inferentially feedback-silenced context in healthy women. Therefore, both factors must be considered in framing hypotheses of endogenous GH drive.
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Affiliation(s)
- Johannes D Veldhuis
- Departments of Internal Medicine, Mayo Medical and Graduate Schools of Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA.
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Zhou GY, Zhou GS, Jian-hong J. [Clinical observation on transcutaneous electrical acupoint stimulation for treatment of functional dyspepsia]. Zhongguo Zhen Jiu 2009; 29:436-440. [PMID: 19563187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To compare the therapeutic effects of transcutaneous electrical point stimulation and medication on functional dyspepsia. METHODS Two hundred and fifty cases were randomly divided into an observation group and a control group, 125 cases in each group. The observation group was treated with transcutaneous electrical acupoint stimulation and oral administration of placebo, transcutaneous electrical stimulated at Zusanli (ST 36), Liangmen (ST 21), Taichong (LR 3) etc. The control group was treated with oral administration of Mosapride citrate dispersible tablets, Domperidone and Omeprazole and the placebo treatment of transcutaneous electrical acupoint stimulation, the stimulated position was 3-4 cm to the selected points of the observation group, the amount of the stimulation did not reach the treatment amount. The symptom score, the plasma motilin (MTL) concentration and the somatostatin (SS) concentration were observed before and after treatment of 3 courses. RESULTS All symptom scores after treatment were lower than that before treatment in the two groups, the scores of the upper abdominal pain, acid regurgitation, belching and abdominal distention in the observation group were significantly lower than that in the control group (P < 0.05, P < 0.01); the treatments of both two groups can increase the plasma MTL concentration and decrease the SS concentration (both P < 0.001), and the plasma MTL concentration in the observation group was significantly higher than that in the control group (P < 0.01), and the SS concentration was significantly lower than that in the control group (P < 0.05). CONCLUSION Transcutaneous electrical point stimulation can more reduce the symptoms of upper abdominal pain, acid regurgitation, belching and abdominal distention, etc. in the functional dyspepsia patients than medication treatment, and can increase the concentration of the plasma MTL and decrease the SS concentration, thus to improve the gastrointestinal motility.
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Affiliation(s)
- Guo-ying Zhou
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Xinxiang Medical College, Weihui 453100, China.
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Tomita R. Relationship between interdigestive migrating motor complex and gut hormones in human. Hepatogastroenterology 2009; 56:714-717. [PMID: 19621688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND/AIMS To clarify the relationships between the onset of IMMC-pIII from the stomach or duodenum and the changes in plasma levels of gut hormones such as motilin (MOT) and somatostatin (SOM), the fasting phasic motility, especially interdigestive migrating motor complex phase III (IMMC-pIII), and changes in these 2 hormones in humans was studied. METHODOLOGY Thirty-three patients (17 men and 16 women, 20 to 65 years of age with a mean age of 54 years) who were hospitalized for treatment of body surface diseases and had no digestive diseases were studied. The occurrences of IMMC-pIII from both stomach or duodenum measured by a micro-tip force transducer with respect to the intra-gastroduodenal pressure were compared, and changes in the plasma levels of both motilin (MOT) and somatostatin (SOM) were monitored. RESULTS IMMC-pIII occurred in all subjects. IMMC-pIII from the stomach was 54.5% (18/33) and that from the duodenum 45.5% (15/33). The plasma MOT levels in both IMMC-pIII from the stomach and duodenum were higher in IMMC-pIII compared with that in phase I. The plasma SOM levels in both IMMC-pIII from stomach or from duodenum were higher in IMMC-pIII compared with phase I. There were no significant differences in plasma levels of MOT and SOM in IMMC-pIII from both stomach and duodenum. CONCLUSIONS Both MOT and SOM are considered with the onset of IMMC-pIII from both stomach and duodenum. The onset of IMMC-pIII may be coordinated by these 2 hormones.
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Affiliation(s)
- Ryouichi Tomita
- Department of Surgery, Nippon Dental University School of Dentistry, Tokyo, Japan
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Wu H, Deng YY, Kang Y, Huang MH, Hu L, Tang CW. [Clinical implication of blood somatostatin determination in critically ill patients]. Zhongguo Wei Zhong Bing Ji Jiu Yi Xue 2009; 21:307-310. [PMID: 19439122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To investigate the relationship between contents of blood somatostatin (SST) and inflammatory reaction or severity of illness in critically ill patients, and its value in the evaluation of prognosis. METHODS Sixty critically ill patients were divided into three groups according to the acute physiology and chronic health evaluation II (APACHE II) score as mild (<16, 23 cases), mediate (16 - 20, 20 cases) and severe (>20, 17 cases) group; and also divided as dead (D, 13 cases) or survival group (S, 47 cases) according to the final outcome; 20 healthy volunteers served as control. The blood SST concentration was detected by radioimmunoassay, while the levels of tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) were measured by enzyme linked immunosorbent assay (ELISA). RESULTS The SST concentration in critically ill patients was significantly lower than normal control [(18.2+/-17.6) ng/L vs. (224.8+/-130.2) ng/L, P<0.05], while the levels of TNF-alpha and IL-6 were significantly higher [TNF-alpha: (32.4+/-14.2) ng/L vs. (14.2+/-5.7) ng/L, IL-6: (131.6+/- 42.7) ng/L vs. (65.8+/-24.3) ng/L, both P<0.05]. The SST concentration in severe group was significantly lower than that of mild and mediate group [(8.1+/-7.2) ng/L vs. (24.7+/-15.9) ng/L and (19.2+/-22.1) ng/L, both P<0.05], while the levels of TNF-alpha and IL-6 were significantly higher than mild group [TNF-alpha: (39.0+/-16.4) ng/L vs. (28.9+/-10.9) ng/L, IL-6: (156.0+/-49.6) ng/L vs. (111.5+/-32.6) ng/L, both P<0.05]. A negative correlation was found between SST and TNF-alpha, IL-6, also between SST and APACHE II score (r(1)=-0.682, r(2)=-0.894, r(3)=-0.327, P<0.05 or P<0.01). The SST concentration in D group was significantly lower than S group [(6.4+/-5.5) ng/L vs. (21.5+/-18.4) ng/L, P<0.05]. CONCLUSION The SST level in blood can reflect the severity of illness in critically ill patients and shows clinical value in evaluation of prognosis.
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Affiliation(s)
- Hao Wu
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
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Alçada MNMP, Monteiro R, Calhau C, Azevedo I. Orange juice vs soft drinks. Arch Intern Med 2009; 169:315. [PMID: 19204227 DOI: 10.1001/archinternmed.2008.598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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Smedh U, Hansson L, Ekman R, Zilling T. Total gastrectomy causes a sustained, long-term elevation of somatostatin in plasma, independent of the mode of reconstruction in pigs. In Vivo 2009; 23:99-103. [PMID: 19368132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
AIM The long-term effects of gastrectomy and various reconstructions of the gastrointestinal tract on fasting plasma levels of gastrointestinal hormones known to contribute to the control of gastrointestinal motor function were evaluated in pigs. MATERIALS AND METHODS Domestic pigs were randomly selected to sham surgery or total gastrectomy (TG) followed by reconstruction with oesophago-jejunostomy on a Roux-en-Y loop (OJRY), jejunal interposition between the oesophagus and the duodenum (OJD), or an oesophagojejunostomy with a proximal jejunal pouch reservoir (J-pouch) on a Roux-en-Y loop. Blood was collected just before surgery and ten weeks later and peptide levels were analysed by radioimmunoassay. RESULTS Somatostatin levels were sustained at a high level after TG, regardless of the mode of reconstruction, but were significantly lower in sham-operated animals. Levels of vasoactive intestinal peptide (VIP), neurotensin and motilin were unchanged. CONCLUSION TG by itself leads to high levels of somatostatin long term, however, somatostatin, motilin, neurotensin and VIP are unaffected by the mode of reconstruction.
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Affiliation(s)
- Ulrika Smedh
- Department of Surgery, Lund University Hospital, Lund, Sweden.
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De Paula ACB, Gracioso JS, Toma W, Hiruma-Lima CA, Carneiro EM, Brito ARMS. The antiulcer effect of Croton cajucara Benth in normoproteic and malnourished rats. Phytomedicine 2008; 15:815-825. [PMID: 18434121 DOI: 10.1016/j.phymed.2008.02.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 12/19/2007] [Accepted: 02/20/2008] [Indexed: 05/26/2023]
Abstract
The aim of the present study is to investigate the antiulcerogenic effects of the essential oil (EO) of Croton cajucara Benth in rats fed with a normal protein (NP) and low-protein diet (MN). NP and MN rats were treated with the essential oil for 15 days after chronic ulceration was induced. The EO accelerated healing of acetic acid-induced gastric lesions in NP and MN rats (p<0.05). In a similar experiment on chronic ulceration, Epidermal Growth Factor (EGF) mRNA expression increased in NP rats but not in MN rats. In assays of acute antiulcerogenic activity, C. cajucara increased somatostatin plasma levels and decreased gastrin plasma levels in both animal groups. The EO significantly prevented ethanol-induced gastric ulcers in NP and MN rats (p<0.001). Histological examination showed initial regeneration, formation of inflammatory infiltrate and angiogenesis in the epithelium surface of acetic acid-induced ulcers in NP and MN rats. C. cajucara prevented gastric lesions in both animal groups when ethanol methodology was used. We concluded that the EO showed an antiulcerogenic activity mediated by increased somatostatin secretion and EGF mRNA expression.
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Affiliation(s)
- Ana Claudia B De Paula
- Department of Physiology and Biophysics, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil.
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Halperin I, Nicolau J, Casamitjana R, Sesmilo G, Serra-Prat M, Palomera E, Puig-Domingo M. A short acute octreotide test for response prediction of long-term treatment with somatostatin analogues in acromegalic patients. Horm Metab Res 2008; 40:422-6. [PMID: 18393173 DOI: 10.1055/s-2008-1065339] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The usefulness of the acute octreotide test in the selection of acromegalic patients for chronic somatostatin depot analogues treatment is controversial. The aim of the present study was to determine its accuracy for chronic response prediction, and the reliability of a short version of the classic 6-hour test. The data from 26 acromegalics (19 women, 7 men, mean age 52.6+/-13.1 years) studied with an acute octreotide test (6 hours sampling for GH measurement after octreotide 100 microg s. c.) were retrospectively analyzed. Eighteen of them followed chronic somatostatin depot analogues treatment for 12 months. GH nadir was always detected at 2 hours (mean decrease 75.9+/-24%). GH levels at 2 hours positively correlated with the other time-points (r(s) 0.97, 0.98, 0.97, 0.96 at 3, 4, 5 and 6 h, respectively; p<0.0001). During chronic treatment with maximal effective dose for 12 months, 61% of the patients achieved IGF1 <3 SD and 22% reached IGF1 <2 SD. GH nadir correlated with IGF1 decrease at 12 months (r(s) 0.76, p<0001). GH nadir of 9.2 ng/ml predicts IGF1 <3 SD with 82% sensitivity and 58% specificity (75% PPV, 67% NPV); for IGF1<2 SD, 75% sensitivity and 58% specificity are obtained for GH nadir 3.6 ng/ml, with 33% PPV and 89% NPV. Acute octreotide test reliably predicts response to long-term treatment; the short, 2-hour version is fully informative for therapeutic decisions in acromegalic patients.
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Affiliation(s)
- I Halperin
- Servei d'Endocrinologia, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain.
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Ceriello A, Esposito K, Piconi L, Ihnat MA, Thorpe JE, Testa R, Boemi M, Giugliano D. Oscillating glucose is more deleterious to endothelial function and oxidative stress than mean glucose in normal and type 2 diabetic patients. Diabetes 2008; 57:1349-54. [PMID: 18299315 DOI: 10.2337/db08-0063] [Citation(s) in RCA: 860] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To explore the possibility that oscillating glucose may outweigh A1C levels in determining the risk for cardiovascular diabetes complications. RESEARCH DESIGN AND METHODS A euinsulinemic hyperglycemic clamp at 5, 10, and 15 mmol/l glucose was given in increasing steps as a single "spike" or oscillating between basal and high levels over 24 h in normal subjects and type 2 diabetic patients. Flow-mediated dilatation, a marker of endothelial function, and plasma 3-nitrotyrosine and 24-h urinary excretion rates of free 8-iso PGF2 alpha, two markers of oxidative stress, were measured over 48 h postclamp. RESULTS Glucose at two different levels (10 and 15 mmol/l) resulted in a concentration-dependent fasting blood glucose-independent induction of both endothelial dysfunction and oxidative stress in both normal and type 2 diabetic patients. Oscillating glucose between 5 and 15 mmol/l every 6 h for 24 h resulted in further significant increases in endothelial dysfunction and oxidative stress compared with either continuous 10 or 15 mmol/l glucose. CONCLUSIONS These data suggest that oscillating glucose can have more deleterious effects than constant high glucose on endothelial function and oxidative stress, two key players in favoring cardiovascular complications in diabetes. Concomitant vitamin C infusion can reverse this impairment.
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Affiliation(s)
- Antonio Ceriello
- Centre of Excellence in Diabetes and Endocrinology, University Hospital of Coventry and Warwickshire, Warwick Medical School, University of Warwick, Coventry, UK.
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Shao Y, Lai XS, Gong YZ, Yan B, He LL, Luo R, Tang CZ. [Effects of electroacupuncture on plasma and cerebral somatostatin and beta-EP contents and learning-memory ability in vascular dementia rats]. Zhen Ci Yan Jiu 2008; 33:98-102. [PMID: 18630584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To observe the effect of electroacupuncture (EA) on learning-memory ability of vascular dementia (VD) rats, and the simultaneous changes of plasma and cerebral somatostatin (SS) and beta-endorphin (EP) contents. METHODS Forty-one SD rats were randomly divided into control (n=8), model A (n=8, no treatment) and B (n=8, intragastric perfusion of 15% saline), EA (n=9) and medication (n=8, intragastric perfusion of Nimoldipine, 12 mg/kg) groups. VD model was established by using modified 4-vessels occlusion method. EA (150 Hz, 1-2 mA) was applied to "Baihui" (GV 20), "Dazhui" (DU 14), "Pishu" (BL 20) and "Shenshu" (BL 23) for 20 min, once daily for 15 days. Morris water maze tests were conducted for evaluating the rats' learning-memory ability. The contents of SS and beta-EP in plasma and brain tissue were measured by radioimmunoassay (RIA). RESULTS In comparison with sham-operation group, the escape latency (EL) prolonged significantly and the target-platform crossing times decreased remarkably (P<0.01) in model group B. In comparison with model group B, EL shortened and target-platform crossing times increased both significantly in EA and medication groups (P<0.01). Plasma and cerebral SS, and cerebral beta-EP contents of model groups A and B were significantly lower than those of sham-operation group(P<0.01), while plasma beta-EP level had no obvious change (P>0.05). Plasma and cerebral SS, and cerebral beta-EP contents in both EA and medication groups were considerably higher than those in model groups A and B (P<0.01). No significant differences were found between EA and medication groups in EL, target-platform crossing times, plasma and cerebral SS and beta-EP levels, and between model group A and model group B in plasma and cerebral SS and beta-EP levels (P>0.05). CONCLUSION EA can raise plasma and cerebral SS and cerebral beta-EP levels, and improve the learning-memory ability in VD rats.
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Affiliation(s)
- Ying Shao
- Acu-moxibustion and Massage, Guangzhou University of Chinese Medicine, Guangzhou 510405, China.
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Antal A, Nemeth J, Szolcsányi J, Pozsgai G, Pinter E. Abdominal surgery performed under general anesthesia increases somatostatin-like immunoreactivity in human serum. Neuroimmunomodulation 2008; 15:153-6. [PMID: 18716415 DOI: 10.1159/000151528] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Accepted: 05/19/2008] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE It has been established in animals that somatostatin (SST) is released from pain-activated sensory nerve endings and exerts systemic antinociceptive and anti-inflammatory actions. The aim of this study was to investigate the changes of SST-like immunoreactivity (SST-LI) in human serum before, immediately after and 2 h after surgical operations. METHODS 25 patients were enrolled in the study. Laparoscopic cholecystectomy, abdominal wall hernia or inguinal hernia operations were performed under combined anesthesia. A 5-ml blood sample was drawn from each patient, the blood was centrifuged and the serum frozen. SST-LI was determined from the defrosted samples by radioimmunoassay. RESULTS Abdominal surgical operationsinduced a significant increase of SST-LI in the serum. 2 h later it was restored in the cases of laparoscopic interventions but still remained elevated after hernia surgeries. CONCLUSIONS In this human study we showed for the first time that surgical interventions elevate the endogenous SST-LI in human serum. It is assumed that the released SST is derived from the activated sensory nerves. Since antinociceptive and anti-inflammatory effects of neural SST have already been established in laboratory animals, we presume that this endogenous protective mechanism also operates in humans.
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Affiliation(s)
- Andras Antal
- Department of Surgery, General Hospital Nagyatad, Nagyatad, Hungary
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Kinová S, Duris I, Kratochvíl'ová E, Kovácová E, Koren M. Tailored intermittent therapy of carcinoid. Hepatogastroenterology 2007; 54:1716-1719. [PMID: 18019702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND/AIMS There is no established standard care of carcinoids as all experts agree. Endogenous somatostatin diurnal rhythm is influenced by administration of lanreotid. The purpose of this study is to evaluate efficacy of lanreotid on the clinical course in a group of patients with metastatic carcinoid. METHODOLOGY In 43 patients with carcinoid tumors somatostatin serum level, 5-HIAA (5-hydroxyindolacetic acid), NSE (neuron-specific enolase), and chromogranin A were examined. Fifteen patients received 30mg of somatulin (Lanreotid) in two-week intervals. RESULTS Therapy with somatostatin analogue improved symptoms in 70-80% of patients with metastases and carcinoid syndrome. 5-HIAA significantly decreased after lanreotid therapy. NSE values are undulating. With progression of the disease they rise. Chromogranin is higher in patients with advanced metastatic disease. Mesor of the diurnal excretion of somatostatin is higher (32 pg/mL) in patients with metastatic disease than in patients without (20 pg/mL). After lanreotid administration mesor decreased (16 pg/mL) in the group of patients with metastases. CONCLUSIONS Intermittent lanreotid therapy is efficient. A rise--(ascend) of endogenous SMS level could be one of the markers of increased activity of carcinoid cells and an indication for the next application of lanreotid therapy. Mean survival of patients with metastatic carcinoid in our study was 46.3 months.
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Affiliation(s)
- Sona Kinová
- Department of Internal Medicine, Comenius University, Bratislava, Slovakia.
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Li XM, Li XE, Sun GB, Liu JZ, Guo BJ. [Physiological effects of cold and cool Chinese herbal medicine of channel tropism of stomach on rats with stomach-heat syndrome]. Zhongguo Zhong Yao Za Zhi 2007; 32:1064-7. [PMID: 17672345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
OBJECTIVE Stomach physiological effects of channel tropism of stomach, cold & cool Chinese herbal medicine on rats with stomach-heat syndrome were studied. METHOD Using water decoction of warm &heat medicine, Rhizoma Zingiberis to feed rats for 15 days continuously, causing the stomach-heat sydrome model, then decoction of Rhizoma Coptidis, Herba Taraxaci, Fractus Aurantii Immaturus was used to feed rats for 10 days, respectively. Biochemical indexes of blood reflecting the physiological function of stomach, including thromboxaneB2 (TXB2), 6-keto-PGF(1alpha), Gastrin (Gas), Motilin (MTL), and Somatostation (SS) were measured by radioimmunoassay. RESULT Symptom of stomach-heat syndrome prevailed in body of rats after filled with decoction of Rhizoma Zingiberis, values of TXB2/6-keto-PGF(1alpha), MTL, and Gas in blood raised up evidently, compared with the control (P < 0.05), but values of 6-keto-PGF(1alpha). decreased conspicuously (P < 0.05). After treated with decoction of Rhizoma Coptidis, Herba Taraxaci or Fractus Aurantii Immaturus for 10 days, respectively. Symptoms of stomach heat syndrome were eliminated or alleviated, values of 6-keto-PGF(1alpha), and SS in blood elevated at different degrees, and those of TXB2, TXB2/6-keto-PGF(1alpha), MTL, and Gas felled down at different degrees. Difference of efficacy existed at different groups, group of Rhizoma Coptidis was the strongest, group of Herba Taraxaci was the second, group of Fractus Aurantii Immaturus was the third. Efficacy of medicine in groups with high dosage was stronger than those with low dosage. CONCLUSION Channel tropism of stomach, cold and cool Chinese herbal medicine could improve the physiological functions of stomach effectively, and the efficacy concerns with the degree of their cold and cool characteristics.
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Affiliation(s)
- Xiao-mei Li
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, South China Normal University, Guangzhou 510631, China
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Boden G, Vaidyula V, Homko C, Mozzoli M, Rao AK. Differential effects of somatostatin on circulating tissue factor procoagulant activity and protein. Am J Physiol Endocrinol Metab 2007; 292:E1333-9. [PMID: 17213471 DOI: 10.1152/ajpendo.00483.2006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The tissue factor (TF) pathway is the primary mechanism for initiation of blood coagulation. Circulating blood contains TF, which originates mainly from monocytes and is thrombogenic. The presence of somatostatin (SMS) receptors on monocytes suggests the possibility that SMS may regulate TF synthesis and/or release. Circulating TF procoagulant activity (TF-PCA), factor VIIa activity (FVIIa; clotting assays), TF antigen (TF-Ag; ELISA), prothrombin fragment 1.2 (F1.2), thrombin-antithrombin complexes (ELISAs), CD40 ligand expression on platelets, and monocyte-platelet aggregates (flow cytometry) were determined in blood from normal volunteers undergoing 24 h of basal glucose/basal insulin (BG/BI) clamps and high-glucose/high-insulin (HG/HI) clamps with and without SMS. Infusions of SMS under basal conditions (BG/BI) raised TF-PCA 1.8-fold (P < 0.03), TF-Ag 2.3-fold (P < 0.001), and TF expression on monocytes by 36% (P < 0.001) and decreased plasma levels of FVIIa by 30% (P < 0.001). Infusion of SMS reduced the 8.6-fold HG/HI-induced increase in TF-Ag by 26% and the 8.6-fold increase in TF-PCA by 100%. SMS also prevented the 60% increase in TF expression on monocytes, the 2.2-fold increase in F1.2, the 40% increase in CD40L expression on platelets, and the 17% increase in monocyte-platelet aggregates seen during HG/HI. We conclude that SMS completely prevented HG/HI-induced TF activation in normal volunteers and may be of use to reduce the procoagulant state and acute vascular events in hyperinsulinemic insulin-resistant patients with type 2 diabetes.
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Affiliation(s)
- Guenther Boden
- Division of Endocrinology, Diabetes, and Metabolism and the Clinical Research Center, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA.
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