Studies Of Epithelial Transporters And Ion Channels

This book discusses unique ion channels and transporters that are located within epithelial tissues of various organs including the kidney, intestine, pancreas and respiratory tract. The authors will show, that each of these channels and transporters play crucial roles in transepithelial ion and fluid transport across epithelia and their responsibility in maintaining homeostasis. The reader gains an understanding of the fundamentals of epithelial ion transport, in terms of function, modelling, regulation, trafficking, structure and pharmacology. This is the third of three volumes highlighting the importance of epithelial ion channels and transporters in basic physiology and pathophysiology of human diseases. The focus of this volume lies with different ion channel and transporter families. Additionally, this volume benefits from pharmaceutical contributors and their insights into recent pre-clinical drug discovery efforts and results from clinical trials. Overall, these chapters offer a more thorough coverage of individual epithelial ion channels and transporters from the 1st Edition, along with eleven new chapters. That makes Volume 3 an insightful contribution for physiology students, scientists and clinicians.

This book discusses unique ion channels and transporters that are located within epithelial tissues of various organs including the kidney, intestine, pancreas and respiratory tract. As the authors show, these channels and transporters play crucial roles in transepithelial ion and fluid transport across epithelia and their contribution to maintaining homeostasis. Readers will be introduced to the fundamentals of ion transport in terms of function, modelling, regulation, structure and pharmacology. This is the first of three volumes highlighting the importance of epithelial ion channels and transporters in basic physiology and pathophysiology of human diseases. This volume focuses on basic fundamentals of epithelial transport physiology. There is a range of chapters dedicated to specific aspects of epithelial ion transport and cell function. Accordingly, the authors discuss techniques used to determine epithelial function, principles of epithelia transport, polarization of epithelial cells, mathematical modelling of epithelial ion transport, protein folding of ion channels, degradation epithelial ion channels, fundamentals of epithelial sodium, potassium and chloride transport, fundamentals of bicarbonate secretion, volume regulation, and microRNA regulation of epithelial channels and transporters. Given its scope, Volume 1 offers a valuable resource for physiology students, scientists and clinicians alike.

This book sheds new light on the physiology, molecular biology and pathophysiology of epithelial ion channels and transporters. It combines the basic cellular models and functions by means of a compelling clinical perspective, addressing aspects from the laboratory bench to the bedside. The individual chapters, written by leading scientists and clinicians, explore specific ion channels and transporters located in the epithelial tissues of the kidney, intestine, pancreas and respiratory tract, all of which play a crucial part in maintaining homeostasis. Further topics include the fundamentals of epithelial transport; mathematical modeling of ion transport; cell volume regulation; membrane protein folding and trafficking; transepithelial transport functions; and lastly, a discussion of transport proteins as potential pharmacological targets with a focus on the pharmacology of potassium channels.

This book discusses the unique ion channels and transporters found within the epithelial tissues of various organs, including the kidney, intestine, pancreas and respiratory tract. Authors focus on demonstrating the crucial roles that each of these channels and transporters play in transepithelial ion and fluid transport across epithelia, as well as in maintaining homeostasis. It allows readers to gain an understanding of the fundamentals of ion transport, in terms of function, modelling, regulation, trafficking, structure and pharmacology. This is the second of three volumes highlighting the importance of epithelial ion channels and transporters in basic physiology and pathophysiology of human diseases. This volume focuses on a wide array of epithelial tissues and the use of organoids to study epithelial function. Furthermore, clinical researchers and basic scientists from various fields provide a medical perspective on the physiology of a number of tissues and organs of the body including the pancreas, intestine, sweat glands, mammary gland, inner ear epithelia, retinal pigment epithelia of the eye, choroid plexus, and the ectodermal epithelia in dental enamel formation. This volume aims to ‘round out’ the reader’s journey from basic science to the laboratory bench and clinical management of molecular diseases, making Volume 2 a must-read for students and scientists in the field of physiology, as well as for clinicians.

Building from general principles, the authors clearly explain the fundamental role of epithelia in plasma electrolyte and water balance. Emphasis is placed on experimental approaches and methodology. A comprehensive glossary of terms is included.

Biological cell membranes regulate the transfer of matter and information between the intracellular and extracellular compartments as basic survival and maintenance functions for an organism. This volume contains a series of reviews that are c- cerned with how epithelial plasma membranes regulate the transport of solutes between the intracellular and extracellular compartments of a cell. This book is also an attempt to analyze the molecular basis for the movement of various solutes across an epithelial cell membrane. This volume is devoted to a diversity of epithelial transport mechanisms in rep- sentative cell membranes of a variety of living things. The ?rst section of the book (Chapters 1–6) focuses on mechanisms of solute transport in epithelia of inver- brates. The last section which comprises ten chapters (Chapters 7–16) deals with solute transporters in epithelial cell membranes of vertebrates. It is hoped that with this particular ordering the reader can glean a telescopic view of the evolutionary history of the various epithelial solute transporters.

Cl- absorption and HCO3- secretion are intimately associated processes vital to epithelial function, itself a key physiological activity. Until recently the transporters responsible remained obscure, but a breakthrough occurred with the discovery of the SLC26 transporters family. It is now clear that the SLC26 transporters have broad physiological functions since mutations in several members are linked to a variety of diseases. This book describes the properties of this family in detail, with contributions from the leading global researchers in the field. Complementary views from experts on other ion channels are offered in the discussions, which make fascinating reading. This family consists of at least 10 genes, each of which has several splice variants. Most members of the family are expressed in the luminal membrane of epithelial cells. Characterization of anion transport by three members has revealed that all function as Cl-/HCO3- exchangers, suggesting that SLC26 transporters are responsible for the luminal Cl-/HCO3- exchange activity. The SLC26 transporters are activated by the CF transmembrane conductance regulator and activate it in turn, leading to a model in which these molecules act together to mediate epithelial Cl- absorption and HCO3- secretion. The book includes chapters on the transport of other molecules by the SLC26 family, including oxalate in the kidney and sugars in cochlear hair cells amongst others. It also describes recent discoveries that most SLC26 transporters bind to scaffold proteins and that they all contain a conserved domain predicted to participate in protein-protein interactions. These suggest the SLC26 transporters exist in complexes with other Cl- and HCO3- transporters, and possibly other regulatory proteins. This book explores the functional role of these interactions, leading to better understanding of transepithelial fluid and electrolyte secretion and the diseases associated with it.