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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Proteins. ; Cellular signal transduction. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (311 pages)
    Edition: 1st ed.
    ISBN: 9780080539966
    Series Statement: Issn Series
    DDC: 572.6
    Language: English
    Note: Cover -- Contents -- Preface -- List of Contributors -- Chapter 1. Signal Transduction and Gene Expression in the Regulation of Natural Freezing Survival -- 1. Strategies of winter survival in animals -- 2. Freeze-induced gene expression -- 3. Freeze tolerance, glucose metabolism and signal transduction -- 4. Conclusions and future directions -- Acknowledgements -- References -- Chapter 2. Drosophila as a Model Organism for the Transgenic Expression of Antifreeze Proteins -- 1. Introduction -- 2. Properties of AFPs -- 3. Drosophila as a model system for fish AFP expression -- 4. Prospects for the transgenic expression of other AFPs -- 5. Cautions and conclusions -- Acknowledgements -- References -- Chapter 3. Cold-adapted Enzymes: An Unachieved Symphony -- 1. Introduction -- 2. The low temperature challenge -- 3. Structural basis of adaptation to cold -- 4. The activity-stability-flexibility trilogy -- 5. Conclusion and perspectives -- Acknowledgements -- References -- Chapter 4. The Role of Cold-shock Proteins in Low-temperature Adaptation -- 1. Low-temperature adaptation and sensing -- 2. Cold-shock proteins and their role in cold and general stress adaptation -- 3. Regulatory elements involved in CSP synthesis -- 4. Perspectives -- Acknowledgements -- References -- Chapter 5. Hibernation: Protein Adaptations -- 1. Introduction -- 2. Adjustment of energy metabolism for needs of hibernators -- 3. Molecular mechanisms of excitation-contraction coupling in heart and skeletal muscles of mammals -- 4. Changes in the properties of enzyme systems responsible for the functional activity of heart and skeletal muscles during hibernation -- 5. Concluding remarks -- References -- Chapter 6. Aquaporins and water stress -- 1. Rationale -- 2. Introduction -- 3. Osmosis, diffusion and functional properties of aquaporins -- 4. Uphill flow of water. , 5. Desert kangaroo rat and aquaporin distributions -- 6. Physiology of AQP3 and AQP4 -- 7. Water transport in liver and stomach -- 8. Adaptation -- 9. Concluding remarks -- Acknowledgements -- References -- Chapter 7. Gene Expression Associated with Muscle Adaptation in Response to Physical Signals- -- 1. Introduction -- 2. Mechanical factors that influence myosin heavy chain gene expression in mammalian muscle -- 3. Metabolic adaptation in relation to activity -- 4. Switches in myosin gene expression in response to environmental temperature in fish muscle -- 5. Molecular motor switching in response to muscle activity -- 6. Local control of muscle mass and phenotype -- 7. Action of MGF in inducing muscle hypertrophy -- 8. Binding protein and local action of growth factors -- 9. Mechanotransduction mechanisms -- 10. Summary and conclusions -- References -- Chapter 8. Early Responses to Mechanical Stress: From Signals at the Cell Surface to Altered Gene Expression -- 1. Introduction -- 2. Mechanical stress and tissue homeostasis -- 3. Mechanosensation at the cell surface -- 4. Early generation of chemical signals at the cell surface -- 5. Triggering of intracellular signalling cascades -- 6. Transcriptional activation of mechano-responsive genes: examples -- 7. Conclusions and perspectives -- Acknowledgements -- References -- Chapter 9. Fasting and Refeeding: Models of Changes in Metabolic Efficiency -- 1. Introduction -- 2. Biochemical and physiological changes associated with fasting and energy restriction -- 3. Biochemical changes associated with refeeding -- 4. Metabolic depression and metabolic efficiency -- References -- Chapter 10. Nutritional Regulation of Hepatic Gene Expression -- 1. Introduction„energy homeostasis -- 2. Role of the liver in energy homeostasis -- 3. Fatty acid oxidation and the peroxisome proliferator-activated receptor. , 4. Lipogenesis and the induction of lipogenic enzyme genes -- 5. Lipogenesis and the sterol regulatory element binding protein -- 6. Lipogenesis and the carbohydrate responsive transcription factor -- 7. Model for lipogenic enzyme gene regulation -- 8. Conclusions -- References -- Chapter 11. The AMP-activated/SNF1 Protein Kinases: Key Players in the Response of Eukaryotic Cells to Metabolic Stress- -- 1. Introduction -- 2. Early studies of the AMPK/SNF1 protein kinases -- 3. Structure of the AMPK/SNF1 kinases -- 4. Regulation of the AMPK/SNF1 kinases -- 5. Cellular stresses that switch on the AMPK/SNF1 systems -- 6. Target pathways and proteins for AMPK/SNF1 systems -- 7. Future perspectives -- Acknowledgements -- References -- Chapter 12. Cellular Regulation of Protein Kinase C -- 1. Protein kinase C: a central role in signaling -- 2. Structure, function, and regulation of protein kinase C -- 3. Protein kinase C in cell survival and programmed cell death -- 4. Perspectives -- References -- Chapter 13. Mitogen-activated protein kinases and stress -- 1. Introduction -- 2. The SAPK family -- 3. Dual-specificity protein kinases of the SAPK pathway -- 4. Regulation of SAPK by MAPKKKs -- 5. The p38 MAPK family -- 6. Genetic analysis of p38a in mice -- 7. Concluding remarks -- Acknowledgements -- References -- Chapter 14. How to Activate Intrinsic Stress Resistance Mechanisms to Obtain Therapeutic Benefit -- 1. General introduction -- 2. Body' s defense against different forms of stress -- 3. Failure of the intrinsic defense -- 4. Possible avenues for reversal of stress-injury -- 5. Future directions -- Acknowledgements -- References -- Chapter 15. Regulation of Ion Channel Function and Expression by Hypoxia -- 1 Cellular responses to acute hypoxia -- 2. The carotid body -- 3. O2-sensitive K+ channels in other tissues -- 4. O2-sensitive Ca2+ channels. , 5. Other O2-sensitive ion channels -- 6. Mechanisms of O2 sensing -- 7. Chronic hypoxia -- 8. Conclusions -- Acknowledgements -- References -- Chapter 16. Ca2+ Dynamics Under Oxidant Stress in the Cardiovascular System -- 1. Introduction -- 2. Ca2+ influx from extracellular to intracellular space -- 3. Ca2+ extrusion from intracellular space to extracellular space -- 4. Ca2+ translocating processes of sarcoplasmic reticulum -- 5. Protein bound Ca -- 6. Mitochondrial Ca2+ dynamics -- 7. Consequences of oxidant induced increase in [Ca2+] -- 8. Future prospects -- Acknowledgements -- References -- Chapter 17. Role of NF-E2 Related Factors in Oxidative Stress -- 1. Oxidative stress -- 2. Oxidative stress-activated defensive mechanisms -- 3. Transcription factor NF-kB -- 4. NF-E2 Related factors -- 5. Role of NF-E2 related factors in protection against oxidative stress -- 6. Nrf1 and Nrf2 associated factors -- 7. Mechanism of Nrf signaling and activation of ARE-mediated expression and coordinated induction of defensive genes -- Acknowledgements -- References -- Chapter 18. Signal Transduction Cascades Responsive to Oxidative Stress in the Vasculature- -- 1. Introduction: Oxidative stress is implicated in the pathogenesis of vascular diseases -- 2. Cellular sensors of oxidative stress -- 3. Redox regulation of phospholipid-dependent signaling -- 4. Mitogen activated protein kinases as the primary redox-sensitive signal mediators -- 5. Regulation of gene expression and protein secretion by oxidative stress -- 6. Conclusion -- References -- Chapter 19. Oxidative Stress Signaling -- 1. Introduction -- 2. Key Sources of ROS generation -- 3. ROS as second messengers in mitogenic signaling -- 4. Role of ROS in signal transduction -- 5. Transcriptional regulation by ROS -- 6. ROS regulation of NF-kB -- 7. ROS in apoptosis -- References. , Chapter 20. Antioxidant Defenses and Animal Adaptation to Oxygen Availability During Environmental Stress -- 1. Free radicals, antioxidant enzymes and oxidative stress -- 2. Natural anoxia tolerance and adaptations to oxidative stress -- 3. Oxidative stress and natural freeze tolerance in vertebrates -- 4. Oxidative stress and dehydration tolerance in leopard frogs -- 5. Estivation and oxidative stress in land snails and toads -- 6. Conclusions, speculations and perspectives -- Acknowledgements -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Stress (Physiology) -- Molecular aspects. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (325 pages)
    Edition: 1st ed.
    ISBN: 9780080531120
    Series Statement: Issn Series
    DDC: 571.9
    Language: English
    Note: Front Cover -- Environmental Stressors and Gene Responses -- Copyright Page -- Contents -- Preface -- List of contributors -- Chapter 1. Cell Homeostasis and Stress at Year 2000-Two Solitudes and Two Research Approaches -- 1. Introduction -- 2. Contrasting demands of homeostasis and tissue work -- 3. Two categories of models of metabolic regulation -- 4. High precision: the key feature of metabolic pathway integration -- 5. Regulation of human muscle metabolism during work . -- 6. Stability of [metabolites] during changes in tissue work is a general rule -- 7. Traditional explanations of the [s] stability paradox -- 8. Oxygen delivery is fundamental to metabolic regulation -- 9. Oxygen signal transduction in working muscle -- 10. Framework II: explaining the [s] stability paradox with intracellular structure and intracellular perfusion systems -- 11. Summary -- Acknowledgements -- References -- Chapter 2. Quantitative design of muscle energy metabolism for steady-state work -- 1. Introduction -- 2. Steady-state muscle work and ATP utilization -- 3. Pathways of ATP synthesis in muscles -- 4. Biochemical capacities and physiological loads -- 5. Regulating rates to match prevailing requirements -- 6. Upper limits to design and performance -- 7. Conclusion -- Acknowledgements -- References -- Chapter 3. Adaptation and Divergence in Stressful Environments -- 1. Introduction -- 2. Nutrient stress -- 3. Thermal stress -- 4. Conclusions -- Acknowledgements -- References -- Chapter 4. Stress and the Geographic Distribution of Marine and Terrestrial Animals -- 1. Introduction -- 2. Limits to geographic ranges: physiological implications -- 3. The evidence for physiological range limitation -- 4. Stress and species borders: lessons and lacunae -- 5. Rapoport's "rule": the physiological assumptions of macroecology -- 6. Prospects for future analyses. , Acknowledgements -- References -- Chapter 5. The Evolution of Thermal Sensitivity in Changing Environments -- 1. Introduction -- 2. The model -- 3. Results -- 4. Discussion -- 5. Conclusions -- Acknowledgements -- References -- Chapter 6. Adaptations of the Cell Membrane for Life in Extreme Environments -- 1. Introduction -- 2. Bioenergetics of extremophiles -- 3. Summary -- Acknowledgements -- References -- Chapter 7. Cell and Molecular Responses to Hypoxic Stress -- 1. Introduction -- 2. The HIF Story: a model switch mechanism -- 3. Study of hypoxia and cell survival: novel approaches -- 4. Genetic Model Systems -- References -- Chapter 8. Molecular and Cellular Stress Pathways In Ischemic Heart Disease: Targets for Regulated Gene Therapy- Keith A. Webster -- 1. Introduction -- 2. Coronary artery disease -- 3. Bioenergetics and biochemistry of ischemia -- 4. Conventional therapy for ischemia and congestive heart failure -- 5. Redox stress in ischemia reperfusion -- 6. Stress- and mitogen-activated protein kinases -- 7. Apoptosis and heart disease -- 8. IGF-1, PI(3)K and apoptosis -- 9. Gene therapy for myocardial dysfunction -- 10. Summary -- Acknowledgement -- References -- Chapter 9. Cellular and Molecular Basis of Stress Heart -- 1. Stress heart: historical perspectives -- 2. Different forms of stress -- 3. Stress reactions -- 4. Signal transduction system -- 5. Gene expression and transcription regulation -- 6. Summary and future challenges -- References -- Chapter 10. Transcriptional Response to Hyperosmotic Stress -- 1. Introduction -- 2. Hyperosmotic stress -- 3. Regulatory volume increase (RVI), immediate response to hyperosmotic stress -- 4. Transcriptional response -- 5. Solute transporters -- 6. Signaling molecules -- 7. Stress proteins -- 8. Other molecules -- 9. Transcriptional response to urea -- 10. Transcriptional regulation. , 11. Summary -- 12. Signal transduction in response to hyperosmotic stress -- 13. Summary and future directions -- References -- Chapter 11. The Activation of Trans-Acting Factors in Response to Hypo- and Hyper-Osmotic Stress in Mammalian Cells -- 1. Introduction -- 2. Effects of osmotic stress on gene expression -- 3. Osmotic stress and heat shock response -- 4. Heat shock transcriptional factors and stress response -- 5. Heat shock transcription factor and osmotic stress -- 6. Conclusions -- References -- Chapter 12. Osmotic Regulation of DNA Activity and the Cell Cycle -- 1. Introduction -- 2. DNA conformation is influenced by osmotic strength -- 3. DNA activity is modulated during osmotic stress -- 4. The cell cycle is under osmotic control -- 5. Conclusions and perspective -- References -- Chapter 13. Life Without Water: Responses of Prokaryotes to Desiccation -- 1. Introduction -- 2. Induction of desiccation -- 3. Desiccation tolerance and longevity of dried cells -- 4. Cellular targets of desiccation -- 5. Cellular responses to desiccation -- 6. Genetic responses to desiccation -- 7. Stabilization of biomaterials -- References -- Chapter 14. Stress Response in Marine Sponges: Genes and Molecules Involved and Their Use as Biomarkers -- 1. Introduction -- 2. Marine sponges as bioindicators -- 3. Biomarkers in marine sponges -- 4. Methods for investigating stress response in marine sponges -- 5. Induction of stress response in marine sponges -- 6. Conclusion -- Acknowledgements -- References -- Chapter 15. The Effects of Bioenergetic Stress and Redox Balance on the Expression of Genes Critical to Mitochondrial Function -- 1. Introduction -- 2. Interactions between energy metabolism and mitochondrial biogenesis -- 3. Redox mediated changes in mitochondrial biogenesis -- 4. Summary and perspectives -- References. , Chapter 16. The Heat Shock Response of Tropical and Desert Fish (genus Poeciliopsis) -- 1. Historical perspective -- 2. Heat shock protein families -- 3. Heat shock proteins and the thermotolerant state -- 4. Poeciliopsis as a model organism -- 5. The heat shock response of Poeciliopsis -- 6. Evolutionary analysis of two small heat shock proteins from P. lucida -- 7. Diversity of heat shock proteins in Poeciliopsis -- 8. Evidence of HSP70-dependent and independent mechanisms of acquired thermotolerance within one population of tropical fish -- 9. Future prospects -- Acknowledgements -- References -- Chapter 17. The molecular biological approach to understanding freezing-tolerance in the model plant, Arabidopsis thaliana -- 1. Introduction -- 2. Cold acclimation and its implications -- 3. Cold-induced genes in Arabidopsis -- 4. Control of cold-induced gene expression: early events -- 5. Control of cold-induced gene expression: transcription factors and sequence motifs -- 6. Control of cold-induced gene expression: implications of mutants -- 7. Mutations affecting freezing tolerance -- 8. Transgenesis with transcription factors -- 9. Discussion -- 10. Outlook -- References -- Chapter 18. Molecular regulation of insect diapause -- 1. Introduction -- 2. Environmental regulation -- 3. Hormonal regulation -- 4. Gene expression associated with hormone action -- 5. Gene expression associated with storage proteins -- 6. Diapause downregulated genes -- 7. Diapause upregulated genes -- 8. The remaining challenge -- Acknowledgements -- References -- Chapter 19. How do Deep-Sea Microorganisms Respond to Changes in Environmental Pressure? -- 1. Introduction -- 2. Isolation and taxonomy of deep-sea adapted bacteria -- 3. Mechanisms of gene expression under high pressure in piezophiles -- 4. Effect of pressure on respiratory chain components in piezophiles. , Acknowledgements -- References -- Chapter 20. Signaling in Copper Ion Homeostasis -- 1. Bioinorganic chemistry of copper ions -- 2. Copper ions in biology -- 3. Signaling in copper ion homeostasis -- 4. Detoxification -- 5. Uptake -- 6. Distribution -- 7. Export -- 8. Conclusion -- Acknowledgements -- References -- Index.
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  • 3
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Cellular signal transduction. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (357 pages)
    Edition: 1st ed.
    ISBN: 9780080541075
    Series Statement: Issn Series
    DDC: 571
    Language: English
    Note: Cover -- Preface -- List of Contributors -- Contents -- Chapter 1. Ischemic Tolerance in the Brain: Models and Mechanisms -- 1. Introduction -- 2. Myocardial preconditioning -- 3. Brain preconditioning -- 4. Hibernation and hypoxia tolerance -- 5. Conclusions -- References -- Chapter 2. Regulation of Gene Expression by Hypoxia in Lung Alveolar Epithelial Cells -- 1. Introduction -- 2. Effect of hypoxia on Na transport proteins -- 3. Effect of hypoxia on proteins involved in glucose metabolism -- 4. Effect of hypoxia on vascular growth factor expression -- 5. Effect of hypoxia on adhesion molecules expression -- 6. Role of hypoxia-inducible factors in regulation of gene expression -- 7. Conclusion -- References -- Chapter 3. A Profile of the Metabolic Responses to Anoxia in Marine Invertebrates -- 1. Introduction -- 2. Metabolic response to anoxia -- 3. Macromolecular synthesis -- 4. Gene expression -- 5. Triggering the anoxic response -- 6. Transcription factors -- 7. Perspectives -- References -- Chapter 4. The Role of Adenosine in Tissue Protection During Ischemia-Reperfusion -- 1. Introduction -- 2. Endogenous adenosine is protective in ischemia-reperfusion injury -- 3. Adenosine receptors -- 4. Adenosine-stimulated cell pathways and effector activities -- 5. Conclusions and clinical implications -- References -- Chapter 5. NF-kB Function in Inflammation, Cellular Stress and Disease -- 1. Introduction -- 2. Activation of NF-kB -- 3. Attenuation of the NF-kB response -- 4. The inflammatory stress response -- 5. Rheumatoid arthritis -- 6. NF-kB and the airway -- 7. NF-kB and gastro-intestinal disease -- 8. NF-kB and reproductive function -- 9. Other NF-kB associated diseases -- 10. Conclusions -- Acknowledgements -- References -- Chapter 6. MAPping Stress Survival in Yeasts: From the Cell Surface to the Nucleus -- 1. Introduction. , 2. The Hog1 MAPK cascade in budding yeast -- 3. The Spc1 MAPK cascade in fission yeast -- 4. Concluding remarks -- Acknowledgements -- References -- Chapter 7. Calcium Signaling Mediated by Cyclic ADP-Ribose and NAADP: Roles in Cellular Response to Stress -- 1. Introduction -- 2. Calcium signaling mediated by cyclic ADP-ribose and NAADP -- 3. cADPR and plant response to environmental stress -- 4. cADPR and sponge response to heat stress -- 5. cADPR in bacterial infection and immune responses -- 6. Conclusion -- References -- Chapter 8. The Cellular and Molecular Basis of the Detection of Pain -- 1. Introduction -- 2. Ion channels involved in nociception -- 3. Sensitisation of nociceptors -- 4. Pain detection in the viscera -- Acknowledgements -- References -- Chapter 9. Acquired Freezing Tolerance in Higher Plants: The Sensing and Molecular Responses to Low Nonfreezing Temperatures -- 1. Introduction -- 2. Freezing injury in plants -- 3. Biochemical changes associated with cold acclimation -- 4. Alteration of gene expression associated with cold acclimation -- 5. CBF transcription factors define a major cold response pathway in flowering plants -- 6. Mutational analysis of freezing tolerance -- 7. Emerging signaling processes regulating cold acclimation -- 8. Molecular and genetic analysis of signaling transduction of stress responses -- 9. Multiple signal pathways mediate cold acclimation -- 10. Hunting for the temperature sensors -- 11. Conclusions and perspectives -- Acknowledgements -- Disclaimer -- References -- Chapter 10. Sensing and Responses to Low Temperature in Cyanobacteria -- 1. Introduction -- 2. Cellular responses to low-temperature stress -- 3. Cold-inducible genes and their regulation -- 4. Membrane fluidity as a link between low temperatures and the induction of gene expression. , 5. Sensors and transducers of low-temperature signals -- 6. Conclusions and perspectives -- References -- Chapter 11. Dehydrins -- 1. Introduction -- 2. Dehydrins -- 3. Dehydrin gene expression -- 4. Association with abiotic stresses and anticipated functions -- 5. Seed dehydrins -- 6. Localization of dehydrins -- 7. Functional studies of dehydrins -- 8. Conclusions -- References -- Chapter 12. Dual Role of Membranes in Heat Stress: As Thermosensors They Modulate the Expression of Stress Genes and, by Interacting with Stress Proteins, Re-organize Their Own Lipid Order and Functionality -- 1. Introduction -- 2. Membranes as "cellular thermometers -- 3. Pre-existing membrane lipid composition and physical state determines the heat induced membrane damage and has a primary and major effect on cell viability -- 4. HSPs are actively involved in the repair of the damaged membranes in heat-stressed cells by association with the membranes -- Acknowledgements -- References -- Chapter 13. Cellular Adaptation to Amino Acid Availability: Mechanisms Involved in the Regulation of Gene Expression and Protein Metabolism -- 1. Introduction -- 2. Regulation of amino acid metabolism and homeostasis in the whole animal -- 3. Amino acid control of gene expression -- 4. Amino acid control of protein metabolism -- 5. Conclusion -- References -- Chapter 14. Amino Acid-dependent Signal Transduction -- 1. Introduction: amino acid stimulation of S6 phosphorylation -- 2. Amino acids and p70S6 kinase activation -- 3. Amino acid stimulation of 4E-BP1 phosphorylation -- 4. Amino acid stimulation of eEF2kinase -- 5. Amino acid stimulation of elF2a -- 6. Involvement of PI 3-kinase and protein kinase B in amino acid-dependent signaling? Amino acid/insulin synergy -- 7. Amino acids and mTOR activation -- 8. Amino acids and protein phosphatases. , 9. Negative feedback by amino acid signaling on insulin signaling -- 10. mTOR as an ATP sensor. Involvement of AMP-dependent protein kinase? -- 11. Amino acid signaling in B-cells -- 12. Amino acid signaling in vivo -- 13. Amino acid signaling as a function of age -- 14. Mechanisms -- 15. Conclusions -- Acknowledgement -- References -- Chapter 15. Signal Transduction Pathways Involved in the Regulation of Drug Metabolizing Enzymes -- 1. Introduction -- 2. Drug Metabolizing Enzymes (DMEs) -- 3. The antioxidant response element (ARE) -- 4. Transacting factors regulating the expression of Phase II enzymes -- 5. Mitogen-activated protein kinases (MAPKs) -- 6. MAPK activation by phenolic compounds and isothiocyanates: induction of Phase II enzymes -- 7. MAPK activation and ARE-mediated gene expression via Nrf2-dependent mechanism -- 8. Concluding remarks -- Acknowledgements -- References -- Chapter 16. Biological Actions of lnfrared Radiation -- 1. Introduction -- 2. Electromagnetic radiation and human health -- 3. Cellular interactions with IR radiation -- 4. Gene and protein induction -- 5. Perspectives -- Acknowledgements -- References -- Chapter 17. Energy Sensing and Photostasis in Photoautotrophs -- 1. Introduction -- 2. Energy sensing and redox status -- 3. Photosynthetic electron transport -- 4. Excitation pressure and redox sensing -- 5. Photostasis -- 6. Excitation pressure, photoprotection and photostasis -- 7. Summary -- Acknowledgements -- References -- Chapter 18. The Uncoupling Proteins Family: From Thermogenesis to the Regulation of ROS -- 1. Introduction -- 2. UCP1 belongs to the mitochondrial anion carriers family -- 3. The discovery of the uncoupling proteins homologues -- 4. Lessons from the UCP knockout mice -- 5. UCP family, from thermogenesis to the regulation of ROS -- Acknowledgements -- References. , Chapter 19. Regulation of Proliferation, Differentiation and Apoptosis of Brown Adipocytes: Signal Transduction Pathways Involved -- 1. Introduction -- 2. Development, differentiation and involution of brown adipose tissue -- 3. Transcriptional control of brown adipose tissue differentiation -- 4. Regulation of proliferation of brown adipocytes: signals and signal transduction pathways involved -- 5. Regulation of differentiation of brown adipocytes: signals and signal transduction pathways involved -- 6. Apoptosis of brown adipocytes: signals and signal transduction pathways involved in its regulation -- 7. Conclusions -- Acknowledgements -- References -- Chapter 20. Control Analysis of Metabolic Depression -- 1. Introduction -- 2. What is control analysis? -- 3. Applications of control analysis -- 4. Theory -- 5. Examples -- 6. Regulation analysis of cell signalling in pathways that initiate metabolic depression -- 7. Summary -- References -- Chapter 21. Evolution of Physiological Adaptation -- 1. Introduction -- 2. Evolutionary physiology: appropriate comparisons -- 3. Variation in physiological and biochemical traits -- 4. Evolution of thermal acclimation -- 5. Conclusions -- Acknowledgement -- References -- Chapter 22. Dynamic Use of cDNA Arrays: Heterologous Probing for Gene Discovery and Exploration of Organismal Adaptation to Environmental Stress -- 1. Introduction -- 2. Differential gene expression: the early years -- 3. DNA arrays: a brief history -- 4. Evaluation of mammalian hibernation via cDNA array screening -- 5. Reproducibility and reliability -- 6. Outlook -- References -- Index.
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  • 4
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 54 (1992), S. 619-637 
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A particularly strong reduction of metabolic activity is a precondition for long-term survival ofHalicryptus spinulosus von Siebold under anoxic habitat conditions because of its relatively low fuel reserves (mainly glycogen). The present study analyses the mechanism of this metabolic slow-down. For this purpose the effects of environmental anoxia and exposure to hydrogen sulfide on the activity and selected kinetic properties of glycolytic enzymes [glycogen phosphorylase (GP), pyruvate kinase (PK)] and the concentrations of fructose-2,6-bisphosphate in the body wall ofH. spinulosus were analysed. Anoxia and hydrogen sulfide exposure stimulated modifications of the properties of the enzymes, in both cases due to probable covalent modification of the enzyme proteins. Under both conditions phosphorylase activity was depressed by about 1/3, the result of changes in the percentage of enzyme in the activea-form as well as the total amount of enzyme activity expressed (a +b). Effects of anoxia on the properties of pyruvate kinase included reducedV max , decreasedS 0.5 for phospho-enolpyruvate, changes inK a for fructose-1,6-bisphosphate (an initial decrease was followed by a later increase). TheI 50 forL-alanine of PK was extremely reduced under anoxia and showed an even greater sensitivity to the presence of hydrogen sulfide. Anoxia stimulated a slight reduction in the content of fructose-2,6-bisphosphate, whereas exposure to hydrogen sulfide caused a dramatic decrease of this allosteric activator of phos-phofructokinase. The study gives evidence that mechanisms of glycolytic rate depression are conserved within a wide variety of vertebrate and invertebrate phyla. With two exceptions (fructose-2,6-bisphosphate levels and alanine inhibition of PK) the responses to hydrogen sulfide were the same as those to anoxia, suggesting that at a metabolic level, the consequences of each stress on energy metabolism are similar.
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  • 6
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A key regulatory mechanism underlying the switch between aerobic and anaerobic metabolism amongst anoxia-tolerant marine molluscs is reversible protein phosphorylation. To assess the role of cAMP-dependent protein kinase (PKA) in aerobic–anaerobic transitions, the effects of anoxia on the activity and subcellular distribution of PKA were assessed in foot and hepatopancreas of the marine periwinkle, Littorina littorea. Exposure to N2 gas at 5 °C caused a rapid decline in the percentage of total enzyme present as the free catalytic subunit (PKAc) in both tissues; the percentage of PKAc fell from ∼30% in controls to 3% after 1 h anoxia and remained low over 72 h. Total PKA also fell by 30% after 72 h anoxia in hepatopancreas but rebounded during aerobic recovery. Freezing at −8 °C elicited parallel results for both percentage of PKAc and total PKA, suggesting that PKA responses to freezing were stimulated by the ischemia that develops when hemolymph freezes. Anoxia also led to a shift in PKA subcellular distribution in hepatopancreas (but not in foot), the percentage of total PKA activity associated with the nuclear fraction dropping from 25% in controls to 8% in 12 h anoxic snails with opposite changes in the cytosolic fraction. The catalytic subunit (PKAc) of foot PKA was purified to a final specific activity of 63.5 nmol phosphate transferred per minute per milligram protein. Enzyme properties included a molecular weight of 33 to 35 kDa, an activation energy from Arrhenius plots of 65.1 ± 4.8 kJ mol−1, and substrate affinity constants of 151 ± 6 μM for the phosphate acceptor, Kemptide, and 72 ± 9 μM for Mg.ATP. Activity was strongly reduced by mammalian PKA inhibitors (H-89, PKA-I), by neutral chloride salts (I50 values 165 to 210 mM) and by NaF (I50 62 mM). Reduced PKA activity under anoxic or freezing conditions would facilitate the observed suppression of the activities of numerous enzymes that are typically PKA-activated and thereby contribute to the overall anoxia-induced metabolic rate depression.
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  • 7
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The metabolic responses to a series of low oxygen tensions were compared for two species of Mediterranaean bivalves,Mytilus galloprovincialis andScapharca inaequivalvis. Whereas both species have well-developed and similar tolerances of anoxia, the metabolic responses ofS. inaequivalvis to low oxygen tensions indicate a substantially greater tolerance of hypoxia. Compared withM. galloprovincialis, the responses ofS. inaequivalvis included the ability to maintain a constant oxygen consumption down to a much lower pO2 value (ca. 1.7 vs 3.4 ppm), and a lower critical pO2 for the recruitment of fermentative pathways of ATP production (ca. 1 vs 3 ppm). Furthermore, a graded increase in the output of anaerobic products (succinate, alanine) occured at oxygen tensions below 3 ppm inM. galloprovincialis and reached a maximum at 1.6 ppm whereas inS. inaequivalvis the net accumulation of anaerobic products at the lowest oxygen tension tested (0.5 ppm) was still substantially less than the level of production output in complete anoxia. This suggests that fermentative pathways are maximally activated at all oxygen tensions below 1.6 ppm inM. galloprovincialis whereas rates of anaerobic pathways are still less than maximum at 0.5 ppm inS. inaequivalvis. These results indicate that in situations of declining oxygen tensions, such as occur due to eutrophication,M. galloprovincialis would not only begin to experience metabolic stress at higher oxygen tensions thanS. inaequivalvis but would experience greater stress at any given pO2. Such differences in hypoxia tolerances may explain the success of the recently introducedS. inaequivalvis in out-competing the nativeM. galloprovincialis in the Adriatic Sea.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 40 (1984), S. 1261-1262 
    ISSN: 1420-9071
    Keywords: Rana sylvatica ; frog, freeze tolerance ; cryoprotectant synthesis ; glycogen levels, liver ; glucose levels, cryoprotectant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Wood frogs survive extracellular freezing at moderate subzero temperatures (−4°C) for at least 11 days. Freezing survival is aided by the accumulation of high concentrations of glucose as a cryoprotectant in blood and tissues. Glucose production was accompanied by a rapid decline in liver, but not muscle, glycogen levels suggesting that liver is the organ controlling cryoprotectant synthesis.
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  • 9
    ISSN: 1573-5168
    Keywords: rainbow trout ; Oncorhynchus mykiss ; white muscle ; enzyme ; purification ; gluconeogenesis ; pH ; fructose-1,6-bisphosphatase ; phosphofructokinase ; exercise
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Studies of the enzyme fructose-1,6-bisphosphatase (FBPase) of rainbow trout (Oncorhynchus mykiss) have been undertaken in order to illuminate aspects of skeletal muscle gluconeogenesis in these animals. Maximal activities in crude homogenates of several organs suggest that the liver possesses the greatest FBPase activity on a unit g−1 tissue basis but that the white muscle, owing to its bulk, contributes substantially to whole body FBPase activity. Studies of fructose-6-phosphate-1-kinase (PFK) and FBPase in crude homogenates of several organs suggests an important role for intracellular pH in regulating the relative carbon flux through the FBPase/PFK locus in vivo. Furthermore, a three-step purification scheme is described for trout white muscle FBPase by which a stable and homogeneous (by SDS PAGE) enzyme preparation (isoelectric point = 7.2; molecular weight = 37.6 kd) was obtained. Kinetic studies of the purified enzyme were undertaken at 20°C under conditions reflective of "rest" and "exercise/recovery" intramuscular pH in vivo. Affinity for substrate (F-1,6-P2) was increased (Km = 6.88 versus 2.44 μmol 1-−1 as was enzyme activity when pH was lowered from 7.0 to 6.5. Various inhibitor metabolites are identified including F-2,6-P2 (mixed-type inhibitor, Ki = 0.201 μmol 1−1, pH 7.0) and AMP (non-competitive inhibitor, Ki = 0.438 μmol 1−1, pH 7.0). Inhibition by F-2,6-P2 was strongly alleviated by a reduction in pH from 7.0 to 6.5 (I50 increased from 0.14 to 0.32 μmol 1−1). AMP on the other hand was a more potent inhibitor at pH 6.5 but this inhibition was totally reversed under conditions of citrate, NH4 + and AMP typical of muscle during recovery from exercise in vivo. In purified white muscle enzyme preparations, FBPase demonstrated maximal activity at pH 6.5 whereas the optimal pH of PFK was 7.0 or greater. Indeed, it appears from these in vitro data that regulation by metabolite levels as well as pH are required for net FBPase flux in vivo. It is concluded, therefore that trout white muscle FBPase demonstrates the potential to play an important enzymatic role in the control of intramuscular gluconeogenesis in these animals. The results are discussed in relation to present knowledge regarding the metabolic responses of trout white muscle to, and its subsequent recovery from, exhaustive exercise.
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  • 10
    ISSN: 1573-5168
    Keywords: Oncorhynchus mykiss ; phosphofructokinase ; fructose- 1,6-bisphosphatase ; enzyme binding ; exercise ; AMP-deaminase regulatory properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Effects of exercise on the distribution of phosphofructokinase (PFK), fructose-1,6-biphosphatase (FBPase), and AMP-deaminase between free and particulate-bound fractions was analyzed in white skeletal muscle of rainbow trout Oncorhynchus mykiss. With a widely used technique for the separation of free and bound enzyme fractions (homogenization in low ionic strength, high sucrose buffer), the data showed that the amount of bound PFK increased from 64 to 95% during burst swimming whereas other enzymes were unaffected. Since this data for AMP-deaminase contrasted with earlier reports, different methods of separating free and bound enzyme were evaluated. A clear effect of exercise on AMP-deaminase binding occurred when high ionic strength media (either KCl or KF) were used; in extraction media containing 150 mM KCl, the percent bound rose from 30% in controls to 97% after 1 min burst swimming. Exercise also produced stable changes to AMP-deaminase kinetic properties, including for the bound enzyme (compared with the free) a 2-fold higher Km AMP, a 3-fold higher Ki for inorganic phosphate, and a 60% increase in Ka ADP after 1 min burst exercise. The data suggest that AMP-deaminase in working skeletal muscle is subject to combined controls by allosteric effectors, post-translational modification, and distribution between free and bound states.
    Type of Medium: Electronic Resource
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