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Extracellular and Intracellular Signaling

RSC Drug Discovery Series

Editor-in-Chief

Professor David Thurston, London School of Pharmacy, UK

Series Editors:

Dr David Fox, Pfizer Global Research and Development, Sandwich, UK

Professor Salvatore Guccione, University of Catania, Italy

Professor Ana Martinez, Instituto de Quimica Medica-CSIC, Spain Dr David Rotella, Montclair State University, USA

Advisor to the Board:

Professor Robin Ganellin, University College London, UK

Titles in the Series:

1:Metabolism, Pharmacokinetics and Toxicity of Functional Groups: Impact of Chemical Building Blocks on ADMET

2:Emerging Drugs and Targets for Alzheimer’s Disease; Volume 1: BetaAmyloid, Tau Protein and Glucose Metabolism

3:Emerging Drugs and Targets for Alzheimer’s Disease; Volume 2: Neuronal Plasticity, Neuronal Protection and Other Miscellaneous Strategies

4:Accounts in Drug Discovery: Case Studies in Medicinal Chemistry

5:New Frontiers in Chemical Biology: Enabling Drug Discovery

6:Animal Models for Neurodegenerative Disease

7:Neurodegeneration: Metallostasis and Proteostasis

8:G Protein-Coupled Receptors: From Structure to Function

9:Pharmaceutical Process Development: Current Chemical and Engineering Challenges

10:Extracellular and Intracellular Signaling

How to obtain future titles on publication:

A standing order plan is available for this series. A standing order will bring delivery of each new volume immediately on publication.

For further information please contact:

Book Sales Department, Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge, CB4 0WF, UK

Telephone: +44 (0)1223 420066, Fax: +44 (0)1223 420247, Email: books@rsc.org Visit our website at http://www.rsc.org/Shop/Books/

Extracellular and Intracellular

Signaling

Edited by

James D. Adams, Jr.

School of Pharmacy, University of Southern California, Los Angeles, CA, USA

Keith K. Parker

Department of Biomedical and Pharmaceutical Sciences (BMED), Skaggs School of Pharmacy and Allied Health Sciences, University of Montana, Missoula, MT, USA

RSC Drug Discovery Series No. 10

ISBN: 978-1-84973-160-7

ISSN: 2041-3203

A catalogue record for this book is available from the British Library

r Royal Society of Chemistry 2011

All rights reserved

Apart from fair dealing for the purposes of research for non-commercial purposes or for private study, criticism or review, as permitted under the Copyright, Designs and Patents Act 1988 and the Copyright and Related Rights Regulations 2003, this publication may not be reproduced, stored or transmitted, in any form or by any means, without the prior permission in writing of The Royal Society of Chemistry or the copyright owner, or in the case of reproduction in accordance with the terms of licences issued by the Copyright Licensing Agency in the UK, or in accordance with the terms of the licences issued by the appropriate Reproduction Rights Organization outside the UK. Enquiries concerning reproduction outside the terms stated here should be sent to The Royal Society of Chemistry at the address printed on this page.

The RSC is not responsible for individual opinions expressed in this work.

Published by The Royal Society of Chemistry,

Thomas Graham House, Science Park, Milton Road,

Cambridge CB4 0WF, UK

Registered Charity Number 207890

For further information see our website at www.rsc.org

Preface

‘‘The ten thousand things carry yin and embrace yang. They achieve harmony by combining these forces.’’

Lao Tzu from the ‘‘Tao Te Ching’’

Keith Parker and I were graduate students in the laboratory of Anthony Trevor at the University of California San Francisco. We studied Pharmacology diligently and were lucky enough to be taught by Dr. Trevor, who is one of the best teachers and a great mentor. The most important concept we learned from him was to be open minded. As we learned about diseases, I became aware that the causes of many diseases were not known, such as diabetes, arthritis, cardiovascular disease, congestive heart failure and other chronic diseases.

I had been fortunate to be taught the Science of Entomology by my father, James David Adams, PhD. On many hikes, he taught me to be open minded and to be ready to go where the data lead. It is after all the data that are important. The hypothesis must change as new data become available.

I married Linda Mei, who taught me to speak Cantonese. I learned about Chinese culture, history, language and medicine. Our son, Elliott Trevor Adams, has given me the opportunity to take him on hikes and explain science to him.

At the University of Southern California, I collaborate with Eric Lien, and am greatly expanding my understanding of Chinese medicine. It was due to his influence that I began to try to describe Chinese medical theory in terms of western scientific mechanisms.

I became the student of Cecilia Garcia, a Chumash Indian healer. She taught me that healing and disease prevention are the first priorities in medicine. I continue to be challenged to find scientific mechanisms to describe American Indian healing.

RSC Drug Discovery Series No. 10 Extracellular and Intracellular Signaling

Edited by James D. Adams, Jr. and Keith K. Parker r Royal Society of Chemistry 2011

Published by the Royal Society of Chemistry, www.rsc.org

v

vi

Preface

This book demonstrates how much science has advanced in the understanding of the causes of diseases and how both intracellular and extracellular signaling are involved. A balance between these signaling cascades is required for health and disease prevention. The concept of balance in health is more than 2000 years old in Chinese medicine, and at least as old in American Indian medicine. This book attempts to give scientific mechanisms that explain the necessity of balance in health.

James David Adams, Jr., PhD

Associate Professor of Pharmacology and Pharmaceutical Sciences University of Southern California, School of Pharmacy Los Angeles, California, USA

This book is jointly edited by Jim Adams and myself, but there is no doubt that the book’s inspiration came from Jim. I am most grateful to Jim for his invitation to join him in this endeavor, and his vision and drive to bring the book into reality has been instrumental to all of us as contributors! After stints in graduate school and post-doctoral research, I envisioned the move back to my home state of Montana in 1981. It was at this time that I began to appreciate the contributions to medicine and health made by native peoples. The holistic themes of this book resonate well with me in that context and, hopefully, such blending of multiple approaches will continue to increase.

As with any project, there are debts to many, and I hope to acknowledge a few of those here. My wife Julie’s and the entire family’s love, dedication and patience are without parallel. I cannot thank them enough. As Jim did, I would also like to thank Tony Trevor; his brilliance as a scientist and his personal confidence in us has been immensely influential. Other mentors that I would like to note are: Pierce Mullen of Montana State University for his continuing friendship; Frank Tikalsky formerly of the Los Alamos National Laboratory for his infinite wisdom and his persistence in showing the wonders of native cultures; Antonia Vernadakis, a true pioneer in the field of glial research; and Eric Wickstrom of the Thomas Je erson Medical College, for his humanity and creativity. Of special note in this regard is Mike Norenberg of the University of Miami’s Miller School of Medicine. Mike’s willingness to write a chapter in the book is deeply appreciated and a unique plus for me and the readers. In these years back in Montana my colleagues throughout the state but especially at the Dillon (Western) and Missoula campuses of the University of Montana have been infinitely supportive and encouraging. In every sense, this book is truly a collaborative e ort!

Keith Krom Parker

Missoula

Montana

USA

Contents

Chapter 1 Extracellular and Intracellular Signaling – a New Approach

 

to Diseases and Treatments

1

James David Adams, Jr., Eric J. Lien and Keith Parker

 

1.1

Introduction

1

 

1.1.1 Linear Model of Drug Receptor Interactions

1

 

1.1.2 Matrix Model of Drug Receptor Interactions

2

1.2

Experimental Approaches to Disease Treatment

3

1.3

Adipokines and Disease Causation

4

1.4

Questions in Disease Treatment

6

1.5

Toxic Lifestyles and Disease Treatment

7

References

9

Chapter 2 Autocrine E ects in White Adipose Tissue and Pancreatic Islets: Emergent Roles in the Regulation of Adipocyte and

Pancreatic b-cell Function 10

Mary C. Sugden and Mark J. Holness

2.1 Introduction

10

2.2Heterogeneity of Adipose Tissue Composition in

 

Relation to Adipokine and Cytokine Secretion

11

2.3

Feedback between FA and the Adipocyte

14

2.4

Autocrine E ects of Leptin and Adiponectin

 

 

in Adipocytes

15

2.5Potential E ects of PPARa Deficiency on Autocrine

Signaling in Adipose Tissue

17

RSC Drug Discovery Series No. 10 Extracellular and Intracellular Signaling

Edited by James D. Adams, Jr. and Keith K. Parker r Royal Society of Chemistry 2011

Published by the Royal Society of Chemistry, www.rsc.org

vii

viii

Contents

2.6Metabolic Programming of Autocrine Signaling

in Adipose Tissue

19

2.7Autocrine E ects on Adipose Tissue Could Modulate

 

the Operation of the Adipocyte Circadian Clock

20

2.8

Cell Heterogeneity in the Pancreatic Islet

21

2.9

Autocrine E ects of Insulin on the Pancreatic

 

 

b Cell

22

2.10Is Early Life Programming of Insulin Resistance by

Altered Insulin Signaling Accompanied by an

 

Abnormal Autocrine E ect of Insulin on the

 

Pancreatic b Cell?

25

2.11 E ects of FA on the Pancreatic b cell

26

2.12E ects of Leptin and Adiponectin on the Pancreatic

b Cell

27

2.13 E ects of TNFa on the b Cell

29

2.14Is Programmed Obesity Associated with b-cell

Inflammation?

29

2.15Other Adipose-derived Factors that Could

Contribute to the Adipoinsular Axis

30

2.16 Concluding Remarks

32

Acknowledgements

32

References

32

Chapter 3 One Receptor for Multiple Pathways: Focus on Leptin

Signaling 44

Rodolfo Go´mez, Javier Conde, Morena Scotece and Oreste Gualillo

3.1

Leptin

 

44

3.2

Leptin Receptors

45

3.3

Leptin Receptor Signaling

45

 

3.3.1

The JAK2-STATs Routes

45

 

3.3.2

ERK1/2

48

 

3.3.3

PI3K/AKT

49

 

3.3.4

AMPK

49

 

3.3.5

SOCS3

50

3.4

Leptin

Receptor Interactions

50

 

3.4.1

Apolipoprotein D

51

 

3.4.2

Sorting Nexin Molecules

51

 

3.4.3

Diacylglycerol Kinase Zeta

51

 

3.4.4

Apolipoprotein J

52

References

 

52

Contents

 

 

ix

Chapter 4 Cell Signaling Mechanisms Underlying the Cardiac Actions

 

of Adipokines

57

Morris Karmazyn and Venkatesh Rajapurohitam

 

4.1

Introduction

57

4.2

Leptin: A Brief Introduction

58

4.3

Expression of Leptin Receptors in Cardiovascular

 

 

Tissues

58

4.4

E ect of Leptin on Cardiomyocyte Function

59

4.5

Cardiomyocyte Hypertrophic E ects of Leptin

59

4.6

Post Receptor Leptin Signaling

61

 

4.6.1

JAK-STAT Pathway Activation

61

 

4.6.2 Mitogen Activated Protein Kinase Stimulation

62

 

4.6.3 Pivotal Role for the RhoA/ROCK System in

 

 

 

Mediating the Hypertrophic E ects of Leptin

63

4.7

Adiponectin

63

 

4.7.1 Adiponectin and Cardiovascular Disease

64

 

4.7.2 Adiponectin and Experimental Cardiac

 

 

 

Hypertrophy

64

 

4.7.3 Cell Signaling Mechanisms Underlying

 

 

 

Cardioprotective and Antihypertrophic

 

 

 

E ects of Adiponectin

65

4.8

Resistin

66

 

4.8.1 Cardiac Actions of Resistin

67

4.9

Apelin

67

 

4.9.1 Apelin and Heart Disease

68

4.10

Visfatin

68

4.11

Other Novel Adipokines

69

4.12

Summary, Conclusions and Future Directions

70

Acknowledgements

70

References

 

70

Chapter 5 Regulation of Muscle Proteostasis via Extramuscular Signals

77

Philip J. Atherton and Nathaniel J. Szewczyk

 

5.1

Basic Protein Synthesis

77

5.2 The E ects of Extramuscular Signals on Global

 

 

Proteostasis in Muscle

79

 

5.2.1

Hormones

79

 

5.2.2

Local Factors (Autocrine/Paracrine)

82

5.3 Regulation of Muscle Proteostasis in Humans

88

 

5.3.1 Nutrients as Regulators of Muscle Proteostasis

 

 

 

in Man

89

 

5.3.2 Muscular Activity (i.e. Exercise) as a Regulator

 

 

 

of Muscle Proteostasis

92

x

 

 

Contents

5.4

Conditions Associated with Alterations in Muscle

 

 

Proteostasis in Humans

95

 

5.4.1 E ects of Aging on Muscle Proteostasis

96

 

5.4.2

Disuse Atrophy

97

 

5.4.3

Sepsis

99

 

5.4.4

Burns

100

 

5.4.5

Cancer Cachexia

101

References

 

102

Chapter 6 Contact Normalization: Mechanisms and Pathways

 

to Biomarkers and Chemotherapeutic Targets

105

Jhon Alberto Ochoa-Alvarez, Candacy George, Harini

 

Krishnan, Xiaoxuan Wu and Gary S. Goldberg

 

6.1

Introduction

105

6.2

Contact Normalization

106

6.3

Cadherins

106

6.4

Gap Junctions

107

6.5

Contact Normalization and Tumor Suppressors

108

6.6

Contact Normalization and Tumor Promoters

109

6.7

Conclusions

110

References

 

110

Chapter 7 Involvement of Adipokines in Migraine Headache

116

Keith K. Parker

 

7.1

Introduction

116

7.2

Background on Migraine Headache

117

7.3

Migraine and Neuropathic Pain

119

7.4

Role of Astrocytes in Pain

121

7.5

Adipokines and Related Extracellular Signalling

122

7.6

The Future of Signaling Research to Migraine

125

Acknowledgements

125

References

 

125

Chapter 8 Adipokines and Alzheimer’s Disease

130

Maria Angela Sortino, Sara Merlo and Simona Spampinato

8.1

Alzheimer’s Disease

130

 

8.1.1

b-Amyloid and Tau

131

 

8.1.2 Target for AD Therapy

133

8.2

AD and Metabolic Dysfunction

134

 

8.2.1

Impaired Glucose Metabolism

134

 

8.2.2

Lipid Disorders

135

 

8.2.3

Obesity

136

Contents

 

 

xi

8.3

Adipokines

136

 

8.3.1

Leptin

137

 

8.3.2

Adiponectin

139

 

8.3.3

Resistin

139

 

8.3.4

Visfatin

140

 

8.3.5

Plasminogen Activator Inhibitor

140

 

8.3.6

Interleukin-6

141

 

8.3.7

Transforming Growth Factor-b1

141

8.4

Conclusions

142

References

 

142

Chapter 9 Astrocyte Signaling in Neurological Disorders

149

A. R. Jayakumar and M. D. Norenberg

 

9.1

Introduction

149

 

9.1.1

Structure and Function of Astrocytes

149

 

9.1.2

Responses of Astrocytes to Injury

151

9.2 Intracellular Signaling System in Reactive Astrocytes

155

 

9.2.1

Oxidative/Nitrosative Stress (ONS)

155

 

9.2.2

Protein Kinase C (PKC)

156

 

9.2.3

Phosphatidylinositol 3-Kinases (PI3K)

156

 

9.2.4

Mitogen-activated Protein Kinases (MAPKs)

156

 

9.2.5

Signal Transducer and Activator

 

 

 

of Transcription 3 (STAT3)

157

 

9.2.6

Nuclear Factor Kappa B (NF-kB)

158

9.3 Signaling Systems in Astrocyte Swelling

158

 

9.3.1

Oxidative/Nitrosative Stress (ONS)

159

 

9.3.2

Cytokines

159

 

Signaling Kinases

160

 

9.3.3

Protein Kinase C (PKC)

160

 

9.3.4

Phosphatidylinositol 3-Kinase (PI3K)

160

 

9.3.5

Protein Kinase G (PKG)

160

 

9.3.6

Mitogen-activated Protein Kinases (MAPKs)

161

 

Transcription Factors

161

 

9.3.7

Signal Transducer and Activator

 

 

 

of Transcription 3 (STAT3)

161

 

9.3.8

Nuclear Factor Kappa B (NF-kB)

161

 

9.3.9

p53

162

 

Swelling E ectors

162

 

9.3.10

Ion Channels/Transporters/Exchangers

162

 

9.3.11

Aquaporin-4 (AQP-4)

163

9.4

Conclusions and Perspectives

163

Acknowledgements

165

References

 

165

xii

 

Contents

Chapter 10 DNA, Nuclear Cell Signaling and Neurodegeneration

175

James D. Adams, Jr., Ph.D.

 

10.1

Adipokines, Toxic Lipids and the Aging Brain

175

 

10.1.1 Toxic Lifestyles, Adipokines and Toxic Lipids

176

 

10.1.2 Ceramide Toxicity in the Brain

177

 

10.1.3 Endocannabinoids, Ceramide and Amyloidb

177

10.2

The Blood-Brain Barrier as a Target

 

 

for Neurodegenerative Conditions

178

 

10.2.1 Visfatin and the Blood-Brain Barrier

178

10.3

Oxygen Radicals, Hydrogen Peroxide and Cell Death

179

10.4

Gene Transcription and DNA Damage

183

10.5

Conclusions

184

References

 

184

Chapter 11 G Protein-Coupled Receptors: Conformational

 

‘‘Gatekeepers’’ of Transmembrane Signal Transduction

 

and Diversification

188

Ravinder Abrol and William A. Goddard III, FRSC

 

11.1

Introduction

188

11.2

Cellular Signaling

190

 

11.2.1

Types of Signaling

190

 

11.2.2 Membrane Proteins in Signaling

191

11.3

G Protein-Coupled Receptors

192

 

11.3.1

Structure of GPCRs

193

 

11.3.2 GPCR Activation: Conformation Driven

 

 

 

Functional Selectivity

203

 

11.3.3 Functional Control of GPCRs by Ligands

217

 

11.3.4 Challenges in GPCR Targeted Drug Design

221

11.4

Summary and Looking Ahead

223

Acknowledgements

224

References

 

225

Chapter 12 Phytochemicals as Modulators of Signaling in Inflammation

230

Lori Klaidman

 

 

12.1

Introduction

230

12.2

Overview of the Inflammatory Cascade

231

12.3

Overview of NF-kB

232

12.4

PPARg and LXRs Regulate NF-kB

233

12.5

Natural Products and Phytochemical

 

 

Inhibitors of NF-kB

235

 

12.5.1

Anthocyanins

235

 

12.5.2

Gallates

236

Contents

xiii

 

12.5.3

Quercetin

237

 

12.5.4

Isoflavones

237

 

12.5.5

Piperine

238

 

12.5.6

Gingerol

239

 

12.5.7

Curcumin

239

 

12.5.8

Guggulsterone

240

12.6

Agonists of PPARg that Reciprocally Inhibit NF-kB

241

 

12.6.1

Phytanic Acid

241

 

12.6.2

Dehydroabietic Acid

241

 

12.6.3

Geraniol

242

12.7

Agonists of LXR that Reciprocally Inhibit NF-kB

242

 

12.7.1

Stigmasterol

242

 

12.7.2

b-Sitosterol

243

 

12.7.3

Ergosterol

243

12.8

Conclusion

243

References

 

244

Chapter 13 Intracellular Signaling Pathways in Parkinson’s Disease

247

Monica Sanchez Contreras and Fernando Cardozo-Pelaez

 

13.1

Introduction

247

13.2

Selective Dopaminergic Neuronal Death

248

13.3

Signaling Pathways Involved in Selective

 

 

Dopaminergic Neuronal Death

254

 

13.3.1 Initiators and Signaling Molecules

254

 

13.3.2 Signal Transducers, Intracellular Messengers

 

 

 

and Upstream Elements

261

 

13.3.3

Intracellular Signaling Cascades

263

 

13.3.4 Potentially Involved Intracellular Signaling

 

 

 

Components

266

 

13.3.5 E ector Pathways and Final E ects

267

13.4

Conclusions

270

References

 

271

Subject Index

 

 

283

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