- •Preface
- •Contents
- •1 Extracellular and Intracellular Signaling – a New Approach to Diseases and Treatments
- •1.1 Introduction
- •1.1.1 Linear Model of Drug Receptor Interactions
- •1.1.2 Matrix Model of Drug Receptor Interactions
- •1.2 Experimental Approaches to Disease Treatment
- •1.3 Adipokines and Disease Causation
- •1.4 Questions in Disease Treatment
- •1.5 Toxic Lifestyles and Disease Treatment
- •References
- •2.1 Introduction
- •2.2 Heterogeneity of Adipose Tissue Composition in Relation to Adipokine and Cytokine Secretion
- •2.3 Feedback between FA and the Adipocyte
- •2.6 Metabolic Programming of Autocrine Signaling in Adipose Tissue
- •2.8 Cell Heterogeneity in the Pancreatic Islet
- •2.16 Concluding Remarks
- •Acknowledgements
- •References
- •3 One Receptor for Multiple Pathways: Focus on Leptin Signaling
- •3.1 Leptin
- •3.2 Leptin Receptors
- •3.3 Leptin Receptor Signaling
- •3.3.4 AMPK
- •3.3.5 SOCS3
- •3.4 Leptin Receptor Interactions
- •3.4.1 Apolipoprotein D
- •3.4.2 Sorting Nexin Molecules
- •3.4.3 Diacylglycerol Kinase Zeta
- •3.4.4 Apolipoprotein J
- •References
- •4.1 Introduction
- •4.2 Leptin: A Brief Introduction
- •4.3 Expression of Leptin Receptors in Cardiovascular Tissues
- •4.6 Post Receptor Leptin Signaling
- •4.6.2 Mitogen Activated Protein Kinase Stimulation
- •4.7 Adiponectin
- •4.7.1 Adiponectin and Cardiovascular Disease
- •4.7.2 Adiponectin and Experimental Cardiac Hypertrophy
- •4.8 Resistin
- •4.8.1 Cardiac Actions of Resistin
- •4.8.1.1 Experimental Studies on the Cardiac Actions of Resistin
- •4.9 Apelin
- •4.9.1 Apelin and Heart Disease
- •4.10 Visfatin
- •4.11 Other Novel Adipokines
- •4.12 Summary, Conclusions and Future Directions
- •Acknowledgements
- •References
- •5 Regulation of Muscle Proteostasis via Extramuscular Signals
- •5.1 Basic Protein Synthesis
- •5.2.1 Hormones
- •5.2.1.1 Mechanisms of Action: Glucocorticoids
- •5.2.1.2 Mechanisms of Action: TH (T3)
- •5.2.1.3 Mechanisms of Action: Testosterone
- •5.2.1.4 Mechanisms of Action: Epinephrine
- •5.2.2 Local Factors (Autocrine/Paracrine)
- •5.2.2.1 Mechanisms of Action: Insulin/IGF Spliceoforms
- •5.2.2.2 Mechanisms of Action: Fibroblast Growth Factor (FGF)
- •5.2.2.3 Mechanisms of Action: Myostatin
- •5.2.2.4 Mechanisms of Action: Cytokines
- •5.2.2.5 Mechanisms of Action: Neurotrophins
- •5.2.2.7 Mechanisms of Action: Extracellular Matrix
- •5.2.2.8 Mechanisms of Action: Amino Acids (AA)
- •5.3 Regulation of Muscle Proteostasis in Humans
- •5.3.1 Nutrients as Regulators of Muscle Proteostasis in Man
- •5.3.2 Muscular Activity (i.e. Exercise) as a Regulator of Muscle Proteostasis
- •5.4 Conditions Associated with Alterations in Muscle Proteostasis in Humans
- •5.4.2 Disuse Atrophy
- •5.4.3 Sepsis
- •5.4.4 Burns
- •5.4.5 Cancer Cachexia
- •References
- •6 Contact Normalization: Mechanisms and Pathways to Biomarkers and Chemotherapeutic Targets
- •6.1 Introduction
- •6.2 Contact Normalization
- •6.3 Cadherins
- •6.4 Gap Junctions
- •6.5 Contact Normalization and Tumor Suppressors
- •6.6 Contact Normalization and Tumor Promoters
- •6.7 Conclusions
- •References
- •7.1 Introduction
- •7.2 Background on Migraine Headache
- •7.3 Migraine and Neuropathic Pain
- •7.4 Role of Astrocytes in Pain
- •7.5 Adipokines and Related Extracellular Signalling
- •7.6 The Future of Signaling Research to Migraine
- •Acknowledgements
- •References
- •8.1 Alzheimer’s Disease
- •8.1.2 Target for AD Therapy
- •8.2 AD and Metabolic Dysfunction
- •8.2.1 Impaired Glucose Metabolism
- •8.2.2 Lipid Disorders
- •8.2.3 Obesity
- •8.3 Adipokines
- •8.3.1 Leptin
- •8.3.2 Adiponectin
- •8.3.3 Resistin
- •8.3.4 Visfatin
- •8.3.5 Plasminogen Activator Inhibitor
- •8.3.6 Interleukin-6
- •8.4 Conclusions
- •References
- •9.1 Introduction
- •9.1.1 Structure and Function of Astrocytes
- •9.1.1.1 Morphology
- •9.1.1.2 Astrocyte Functions
- •9.1.2 Responses of Astrocytes to Injury
- •9.1.2.1 Reactive Astrocytosis
- •9.1.2.2 Cell Swelling
- •9.1.2.3 Alzheimer Type II Astrocytosis
- •9.2 Intracellular Signaling System in Reactive Astrocytes
- •9.2.1 Oxidative/Nitrosative Stress (ONS)
- •9.2.2 Protein Kinase C (PKC)
- •9.2.5 Signal Transducer and Activator of Transcription 3 (STAT3)
- •9.3 Signaling Systems in Astrocyte Swelling
- •9.3.1 Oxidative/Nitrosative Stress (ONS)
- •9.3.2 Cytokines
- •9.3.3 Protein Kinase C (PKC)
- •9.3.5 Protein Kinase G (PKG)
- •9.3.7 Signal Transducer and Activator of Transcription 3 (STAT3)
- •9.3.10 Ion Channels/Transporters/Exchangers
- •9.4 Conclusions and Perspectives
- •Acknowledgements
- •References
- •10.1 Adipokines, Toxic Lipids and the Aging Brain
- •10.1.1 Toxic Lifestyles, Adipokines and Toxic Lipids
- •10.1.2 Ceramide Toxicity in the Brain
- •10.3 Oxygen Radicals, Hydrogen Peroxide and Cell Death
- •10.4 Gene Transcription and DNA Damage
- •10.5 Conclusions
- •References
- •11.1 Introduction
- •11.2 Cellular Signaling
- •11.2.1 Types of Signaling
- •11.2.2 Membrane Proteins in Signaling
- •11.3 G Protein-Coupled Receptors
- •11.3.1 Structure of GPCRs
- •11.3.1.1 Structure Determination
- •11.3.1.2 Structural Diversity of Current GPCR Structures
- •11.3.1.3 Prediction of GPCR Structure and Ligand Binding
- •11.3.2 GPCR Activation: Conformation Driven Functional Selectivity
- •11.3.2.2 Ligand or Mutation Stabilized Ensemble of GPCR Conformations
- •11.3.2.4 GPCR Dimers and Interaction with Other Proteins
- •11.3.3 Functional Control of GPCRs by Ligands
- •11.3.3.1 Biased Agonism
- •11.3.3.2 Allosteric Ligands and Signal Modulation
- •11.3.4 Challenges in GPCR Targeted Drug Design
- •11.4 Summary and Looking Ahead
- •Acknowledgements
- •References
- •12.1 Introduction
- •12.5.1 Anthocyanins
- •12.5.2 Gallates
- •12.5.3 Quercetin
- •12.5.5 Piperine
- •12.5.6 Gingerol
- •12.5.7 Curcumin
- •12.5.8 Guggulsterone
- •12.6.1 Phytanic Acid
- •12.6.2 Dehydroabietic Acid
- •12.6.3 Geraniol
- •12.7 Agonists of LXR that Reciprocally Inhibit NF-jB
- •12.7.1 Stigmasterol
- •12.7.3 Ergosterol
- •12.8 Conclusion
- •References
- •13.1 Introduction
- •13.2 Selective Dopaminergic Neuronal Death
- •13.3 Signaling Pathways Involved in Selective Dopaminergic Neuronal Death
- •13.3.1 Initiators and Signaling Molecules
- •13.3.1.1 Response to Oxidative and Nitrosative Stress
- •13.3.1.2 Response to Altered Proteostasis
- •13.3.1.3 Response to Glutamate
- •13.3.1.4 Other Initiators
- •13.3.2 Signal Transducers, Intracellular Messengers and Upstream Elements
- •13.3.2.2 Small GTPases
- •13.3.3 Intracellular Signaling Cascades
- •13.3.3.1 Mitogen Activated Protein Kinases (MAPK) Pathway
- •13.3.3.2 PI3K/Akt Pathway
- •13.3.3.4 Unfolded Protein Response (UPR)
- •13.3.4 Potentially Involved Intracellular Signaling Components
- •13.3.4.3 PINK1
- •13.3.5.2 Dopamine Metabolism
- •13.3.5.3 Cell Cycle
- •13.3.5.4 Autophagy
- •13.3.5.5 Apoptosis
- •13.4 Conclusions
- •References
- •Subject Index
Cell Signaling Mechanisms Underlying the Cardiac Actions of Adipokines |
67 |
substrate-1 (IRS-1).86 Thus, the contribution of resistin to the etiology of heart disease in general and heart failure in particular and the underlying mechanistic bases for these e ects is important to clarify particularly as targeting this cytokine may represent a possible useful therapeutic strategy.
4.8.1Cardiac Actions of Resistin
Emerging evidence suggests that cardiovascular disease is accompanied by changes in resistin levels. For example, in women, plasma resistin levels are elevated in patients with coronary heart disease.88 What role resistin plays in the disease process is not known, although in patients with atherothrombotic strokes, plasma resistin levels are associated with elevated risk of 5-year mortality.89 Serum resistin concentrations have also been shown to be elevated in patients with heart failure with levels positively related to the severity of heart failure according to New York Heart Association functional classification.90 Although these studies do not indicate cause-and-e ect relationships, nonetheless increasing plasma resistin concentrations appear to be a predictor of poor prognosis in patients with cardiovascular disease.
4.8.1.1Experimental Studies on the Cardiac Actions of Resistin
Although resistin cell receptors have yet to be identified, direct action of resistin in the heart and specifically on cardiomyocytes has been described. Mouse adult cardiomyocytes treated with resistin show a reduction in insulin-stimulated glucose uptake.81 Furthermore, in contrast to liver, cardiomyocyte resistin signaling requires oligomerization of the ligand prior to receptor binding.81 The precise mechanisms by which resistin exerts its e ects on glucose transport is not completely understood but this appears to occur by impeding vesicular transport.81
The potential role of resistin in cardiac pathobiology has not been extensively studied, although a few studies have been carried out to assess the e ect of resistin on the ischemic and reperfused heart with contradictory results. In one report, resistin depressed functional recovery from ischemia in isolated perfused rat hearts, an e ect which appeared to be dependent on NF-kB activity.91 In contrast, resistin reduced infarct size in mice subjected to coronary artery occlusion and reperfusion.92 These authors also demonstrated that resistin improved functional recovery of isolated mouse hearts and reduced infarct size and proposed that the salutary e ect of resistin occurs via a PI3K/ Akt/PKC pathway. The obvious discrepancy between the two studies is di cult to explain at present but may reflect di erent concentrations of resistin, di erences in experimental model or species diversity.
4.9 Apelin
Apelin is an adipokine that was found to be the endogenous ligand for the G protein-coupled APJ receptor. Apelin has been shown to exert potent