Author: John Masters
Publisher: Springer Science & Business Media
ISBN: 0306468727
Category : Medical
Languages : en
Pages : 295
Book Description
Continuous cell lines derived from human cancers are the most widely used resource in laboratory-based cancer research. The first 3 volumes of this series on Human Cell Culture are devoted to these cancer cell lines. The chapters in these first 3 volumes have a common aim. Their purpose is to address 3 questions of fundamental importance to the relevance of human cancer cell lines as model systems of each type of cancer: 1. Do the cell lines available accurately represent the clinical presentation? 2. Do the cell lines accurately represent the histopathology of the original tumors? 3. Do the cell lines accurately represent the molecular genetics of this type of cancer? The cancer cell lines available are derived, in most cases, from the more aggressive and advanced cancers. There are few cell lines derived from low grade organ-confined cancers. This gap can be filled with conditionally immortalized human cancer cell lines. We do not know why the success rate for establishing cell lines is so low for some types of cancer and so high for others. The histopathology of the tumor of origin and the extent to which the derived cell line retains the differentiated features of that tumor are critical. The concept that a single cell line derived from a tumor at a particular site is representative of tumors at that site is naïve and misleading.
Cancer Cell Lines Part 1
Author: John Masters
Publisher: Springer Science & Business Media
ISBN: 0306468727
Category : Medical
Languages : en
Pages : 295
Book Description
Continuous cell lines derived from human cancers are the most widely used resource in laboratory-based cancer research. The first 3 volumes of this series on Human Cell Culture are devoted to these cancer cell lines. The chapters in these first 3 volumes have a common aim. Their purpose is to address 3 questions of fundamental importance to the relevance of human cancer cell lines as model systems of each type of cancer: 1. Do the cell lines available accurately represent the clinical presentation? 2. Do the cell lines accurately represent the histopathology of the original tumors? 3. Do the cell lines accurately represent the molecular genetics of this type of cancer? The cancer cell lines available are derived, in most cases, from the more aggressive and advanced cancers. There are few cell lines derived from low grade organ-confined cancers. This gap can be filled with conditionally immortalized human cancer cell lines. We do not know why the success rate for establishing cell lines is so low for some types of cancer and so high for others. The histopathology of the tumor of origin and the extent to which the derived cell line retains the differentiated features of that tumor are critical. The concept that a single cell line derived from a tumor at a particular site is representative of tumors at that site is naïve and misleading.
Publisher: Springer Science & Business Media
ISBN: 0306468727
Category : Medical
Languages : en
Pages : 295
Book Description
Continuous cell lines derived from human cancers are the most widely used resource in laboratory-based cancer research. The first 3 volumes of this series on Human Cell Culture are devoted to these cancer cell lines. The chapters in these first 3 volumes have a common aim. Their purpose is to address 3 questions of fundamental importance to the relevance of human cancer cell lines as model systems of each type of cancer: 1. Do the cell lines available accurately represent the clinical presentation? 2. Do the cell lines accurately represent the histopathology of the original tumors? 3. Do the cell lines accurately represent the molecular genetics of this type of cancer? The cancer cell lines available are derived, in most cases, from the more aggressive and advanced cancers. There are few cell lines derived from low grade organ-confined cancers. This gap can be filled with conditionally immortalized human cancer cell lines. We do not know why the success rate for establishing cell lines is so low for some types of cancer and so high for others. The histopathology of the tumor of origin and the extent to which the derived cell line retains the differentiated features of that tumor are critical. The concept that a single cell line derived from a tumor at a particular site is representative of tumors at that site is naïve and misleading.
Cancer Cell Culture
Author: Simon P. Langdon
Publisher: Springer Science & Business Media
ISBN: 1592594069
Category : Medical
Languages : en
Pages : 346
Book Description
The culture of cancer cells is routinely practiced in many academic research centers, biotechnology companies, and hospital laboratories. Cancer Cell Culture: Methods and Protocols describes easy-to-follow methods to guide both novice and more experienced researchers seeking to use new techniques in their laboratories. Our present understanding of the cell and molecular biology of cancer has been derived mainly from the use of cultured cancer cells and we cover a number of the most widely used assays to study function in current use. Part I introduces the basic concept of cancer cell culture and this is followed by a description of the general techniques used in many cell culture facilities. The importance of cell line characterization is now widely recognized and methods to characterize and authenticate cell lines are described in Part II. Part III covers the isolation and development of specific cancer cell types and provides valuable tips for those wishing to derive new cell line models. A wide range of procedures encompassing many of the key functional features of cancer cells are described in Part IV including assays to evaluate clonogenicity, cell proliferation, apoptosis, adhesion, migration, invasion, senescence, angiogenesis, and cell cycle parameters. Methods to modify cancer cells are described in Part V, including protocols for transfection, development of drug-resistance, immortalization, and transfer in vivo. In Part VI methods of coculture of different cell types and contamination of cell lines are covered.
Publisher: Springer Science & Business Media
ISBN: 1592594069
Category : Medical
Languages : en
Pages : 346
Book Description
The culture of cancer cells is routinely practiced in many academic research centers, biotechnology companies, and hospital laboratories. Cancer Cell Culture: Methods and Protocols describes easy-to-follow methods to guide both novice and more experienced researchers seeking to use new techniques in their laboratories. Our present understanding of the cell and molecular biology of cancer has been derived mainly from the use of cultured cancer cells and we cover a number of the most widely used assays to study function in current use. Part I introduces the basic concept of cancer cell culture and this is followed by a description of the general techniques used in many cell culture facilities. The importance of cell line characterization is now widely recognized and methods to characterize and authenticate cell lines are described in Part II. Part III covers the isolation and development of specific cancer cell types and provides valuable tips for those wishing to derive new cell line models. A wide range of procedures encompassing many of the key functional features of cancer cells are described in Part IV including assays to evaluate clonogenicity, cell proliferation, apoptosis, adhesion, migration, invasion, senescence, angiogenesis, and cell cycle parameters. Methods to modify cancer cells are described in Part V, including protocols for transfection, development of drug-resistance, immortalization, and transfer in vivo. In Part VI methods of coculture of different cell types and contamination of cell lines are covered.
Human Tumor Cells in Vitro
Author: Jorgen Fogh
Publisher: Springer Science & Business Media
ISBN: 1475716478
Category : Medical
Languages : en
Pages : 568
Book Description
The study of cultured human tumor cells is a most obvious approach in experimental human cancer research. For many techniques in virology, immunology, biochemistry, and biophysics, for example, large amounts of cells may be required and such quantities are usually provided only when the cultures develop into established cell lines; when this happens, thorough characterization also becomes possible. The development of cell lines, therefore, is of prime importance. Recent major advances in research with animal cell systems see m to be a prologue for present and future efforts directed toward work with human tumor cells in culture. Conceivably, the most significant results in cancer research may develop from work with such cells, and so the time seemed right to define the present state of our knowledge. This is the first book dedicated exclusively to the subject: human tumor cells in vitro. Although so me of the fundamental aspects in the cultivation of human tumor ceIls, and the extent to which they represent human cancer in vivo are still unclear, I asked a number of the leading investigators in this area of research to collect and evaluate previous and present contributions, and to offer their thoughts on the questions to which answers are not yet available. Many of the chapters are concerned with techniques of cultivation. Cultures from some types of tumors have grown weIl; in many cases they have given rise to established cell lines.
Publisher: Springer Science & Business Media
ISBN: 1475716478
Category : Medical
Languages : en
Pages : 568
Book Description
The study of cultured human tumor cells is a most obvious approach in experimental human cancer research. For many techniques in virology, immunology, biochemistry, and biophysics, for example, large amounts of cells may be required and such quantities are usually provided only when the cultures develop into established cell lines; when this happens, thorough characterization also becomes possible. The development of cell lines, therefore, is of prime importance. Recent major advances in research with animal cell systems see m to be a prologue for present and future efforts directed toward work with human tumor cells in culture. Conceivably, the most significant results in cancer research may develop from work with such cells, and so the time seemed right to define the present state of our knowledge. This is the first book dedicated exclusively to the subject: human tumor cells in vitro. Although so me of the fundamental aspects in the cultivation of human tumor ceIls, and the extent to which they represent human cancer in vivo are still unclear, I asked a number of the leading investigators in this area of research to collect and evaluate previous and present contributions, and to offer their thoughts on the questions to which answers are not yet available. Many of the chapters are concerned with techniques of cultivation. Cultures from some types of tumors have grown weIl; in many cases they have given rise to established cell lines.
Cancer Cell Culture
Author: Ian A. Cree
Publisher: Humana Press
ISBN: 9781493956579
Category : Medical
Languages : en
Pages : 502
Book Description
With many recent advances, cancer cell culture research is more important than ever before. This timely edition of Cancer Cell Culture: Methods and Protocols covers the basic concepts of cancer cell biology and culture while expanding upon the recent shift in cell culture methods from the generation of new cell lines to the use of primary cells. There are methods to characterize and authenticate cell lines, to isolate and develop specific types of cancer cells, and to develop new cell line models. Functional assays are provided for the evaluation of clonogenicity, cell proliferation, apoptosis, adhesion, migration, invasion, senescence, angiogenesis, and cell cycle parameters. Other methods permit the modification of cells for transfection, drug resistance, immortalization, and transfer in vivo, the co-culture of different cell types, and the detection and treatment of contamination. In this new edition, specific emphasis is placed on safe working practice for both cells and laboratory researchers. These chapters contain the information critical to success – only by good practice and quality control will the results of cancer cell culture improve. Written in the successful Methods in Molecular BiologyTM series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and accessible, Cancer Cell Culture: Methods and Protocols serves as a practical guide for scientists of all backgrounds and aims to convey the appropriate sense of fascination associated with this research field.
Publisher: Humana Press
ISBN: 9781493956579
Category : Medical
Languages : en
Pages : 502
Book Description
With many recent advances, cancer cell culture research is more important than ever before. This timely edition of Cancer Cell Culture: Methods and Protocols covers the basic concepts of cancer cell biology and culture while expanding upon the recent shift in cell culture methods from the generation of new cell lines to the use of primary cells. There are methods to characterize and authenticate cell lines, to isolate and develop specific types of cancer cells, and to develop new cell line models. Functional assays are provided for the evaluation of clonogenicity, cell proliferation, apoptosis, adhesion, migration, invasion, senescence, angiogenesis, and cell cycle parameters. Other methods permit the modification of cells for transfection, drug resistance, immortalization, and transfer in vivo, the co-culture of different cell types, and the detection and treatment of contamination. In this new edition, specific emphasis is placed on safe working practice for both cells and laboratory researchers. These chapters contain the information critical to success – only by good practice and quality control will the results of cancer cell culture improve. Written in the successful Methods in Molecular BiologyTM series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and accessible, Cancer Cell Culture: Methods and Protocols serves as a practical guide for scientists of all backgrounds and aims to convey the appropriate sense of fascination associated with this research field.
The Immortal Life of Henrietta Lacks
Author: Rebecca Skloot
Publisher: Crown
ISBN: 0307589382
Category : Science
Languages : en
Pages : 386
Book Description
#1 NEW YORK TIMES BESTSELLER • “The story of modern medicine and bioethics—and, indeed, race relations—is refracted beautifully, and movingly.”—Entertainment Weekly NOW A MAJOR MOTION PICTURE FROM HBO® STARRING OPRAH WINFREY AND ROSE BYRNE • ONE OF THE “MOST INFLUENTIAL” (CNN), “DEFINING” (LITHUB), AND “BEST” (THE PHILADELPHIA INQUIRER) BOOKS OF THE DECADE • ONE OF ESSENCE’S 50 MOST IMPACTFUL BLACK BOOKS OF THE PAST 50 YEARS • WINNER OF THE CHICAGO TRIBUNE HEARTLAND PRIZE FOR NONFICTION NAMED ONE OF THE BEST BOOKS OF THE YEAR BY The New York Times Book Review • Entertainment Weekly • O: The Oprah Magazine • NPR • Financial Times • New York • Independent (U.K.) • Times (U.K.) • Publishers Weekly • Library Journal • Kirkus Reviews • Booklist • Globe and Mail Her name was Henrietta Lacks, but scientists know her as HeLa. She was a poor Southern tobacco farmer who worked the same land as her slave ancestors, yet her cells—taken without her knowledge—became one of the most important tools in medicine: The first “immortal” human cells grown in culture, which are still alive today, though she has been dead for more than sixty years. HeLa cells were vital for developing the polio vaccine; uncovered secrets of cancer, viruses, and the atom bomb’s effects; helped lead to important advances like in vitro fertilization, cloning, and gene mapping; and have been bought and sold by the billions. Yet Henrietta Lacks remains virtually unknown, buried in an unmarked grave. Henrietta’s family did not learn of her “immortality” until more than twenty years after her death, when scientists investigating HeLa began using her husband and children in research without informed consent. And though the cells had launched a multimillion-dollar industry that sells human biological materials, her family never saw any of the profits. As Rebecca Skloot so brilliantly shows, the story of the Lacks family—past and present—is inextricably connected to the dark history of experimentation on African Americans, the birth of bioethics, and the legal battles over whether we control the stuff we are made of. Over the decade it took to uncover this story, Rebecca became enmeshed in the lives of the Lacks family—especially Henrietta’s daughter Deborah. Deborah was consumed with questions: Had scientists cloned her mother? Had they killed her to harvest her cells? And if her mother was so important to medicine, why couldn’t her children afford health insurance? Intimate in feeling, astonishing in scope, and impossible to put down, The Immortal Life of Henrietta Lacks captures the beauty and drama of scientific discovery, as well as its human consequences.
Publisher: Crown
ISBN: 0307589382
Category : Science
Languages : en
Pages : 386
Book Description
#1 NEW YORK TIMES BESTSELLER • “The story of modern medicine and bioethics—and, indeed, race relations—is refracted beautifully, and movingly.”—Entertainment Weekly NOW A MAJOR MOTION PICTURE FROM HBO® STARRING OPRAH WINFREY AND ROSE BYRNE • ONE OF THE “MOST INFLUENTIAL” (CNN), “DEFINING” (LITHUB), AND “BEST” (THE PHILADELPHIA INQUIRER) BOOKS OF THE DECADE • ONE OF ESSENCE’S 50 MOST IMPACTFUL BLACK BOOKS OF THE PAST 50 YEARS • WINNER OF THE CHICAGO TRIBUNE HEARTLAND PRIZE FOR NONFICTION NAMED ONE OF THE BEST BOOKS OF THE YEAR BY The New York Times Book Review • Entertainment Weekly • O: The Oprah Magazine • NPR • Financial Times • New York • Independent (U.K.) • Times (U.K.) • Publishers Weekly • Library Journal • Kirkus Reviews • Booklist • Globe and Mail Her name was Henrietta Lacks, but scientists know her as HeLa. She was a poor Southern tobacco farmer who worked the same land as her slave ancestors, yet her cells—taken without her knowledge—became one of the most important tools in medicine: The first “immortal” human cells grown in culture, which are still alive today, though she has been dead for more than sixty years. HeLa cells were vital for developing the polio vaccine; uncovered secrets of cancer, viruses, and the atom bomb’s effects; helped lead to important advances like in vitro fertilization, cloning, and gene mapping; and have been bought and sold by the billions. Yet Henrietta Lacks remains virtually unknown, buried in an unmarked grave. Henrietta’s family did not learn of her “immortality” until more than twenty years after her death, when scientists investigating HeLa began using her husband and children in research without informed consent. And though the cells had launched a multimillion-dollar industry that sells human biological materials, her family never saw any of the profits. As Rebecca Skloot so brilliantly shows, the story of the Lacks family—past and present—is inextricably connected to the dark history of experimentation on African Americans, the birth of bioethics, and the legal battles over whether we control the stuff we are made of. Over the decade it took to uncover this story, Rebecca became enmeshed in the lives of the Lacks family—especially Henrietta’s daughter Deborah. Deborah was consumed with questions: Had scientists cloned her mother? Had they killed her to harvest her cells? And if her mother was so important to medicine, why couldn’t her children afford health insurance? Intimate in feeling, astonishing in scope, and impossible to put down, The Immortal Life of Henrietta Lacks captures the beauty and drama of scientific discovery, as well as its human consequences.
Diagnosis and Management of Cholangiocarcinoma
Author: James H. Tabibian
Publisher: Springer Nature
ISBN: 3030709361
Category : Medical
Languages : en
Pages : 588
Book Description
This book provides a comprehensive, state-of-the-art overview of cholangiocarcinoma (CCA). The text is structured to effectively present a broad yet concise overview of bile duct cancer, its relevant definitions, classification schemata, clinical management tenets, translational (including molecular and cellular) facets, and future directions. The book features numerous high-yield illustrations and is authored by an eclectic range of renowned experts in various areas of CCA, reflecting the multidisciplinary nature of the field. Filling a critical gap in the field, Diagnosis and Management of Cholangiocarcinoma: A Multidisciplinary Approach is a valuable resource for clinicians and practitioners who treat patients with bile duct cancer.
Publisher: Springer Nature
ISBN: 3030709361
Category : Medical
Languages : en
Pages : 588
Book Description
This book provides a comprehensive, state-of-the-art overview of cholangiocarcinoma (CCA). The text is structured to effectively present a broad yet concise overview of bile duct cancer, its relevant definitions, classification schemata, clinical management tenets, translational (including molecular and cellular) facets, and future directions. The book features numerous high-yield illustrations and is authored by an eclectic range of renowned experts in various areas of CCA, reflecting the multidisciplinary nature of the field. Filling a critical gap in the field, Diagnosis and Management of Cholangiocarcinoma: A Multidisciplinary Approach is a valuable resource for clinicians and practitioners who treat patients with bile duct cancer.
Anticancer Drug Development Guide
Author: Beverly A. Teicher
Publisher: Springer Science & Business Media
ISBN: 1592597394
Category : Medical
Languages : en
Pages : 514
Book Description
This unique volume traces the critically important pathway by which a "molecule" becomes an "anticancer agent. " The recognition following World War I that the administration of toxic chemicals such as nitrogen mustards in a controlled manner could shrink malignant tumor masses for relatively substantial periods of time gave great impetus to the search for molecules that would be lethal to specific cancer cells. Weare still actively engaged in that search today. The question is how to discover these "anticancer" molecules. Anticancer Drug Development Guide: Preclinical Screening, Clinical Trials, and Approval, Second Edition describes the evolution to the present of preclinical screening methods. The National Cancer Institute's high-throughput, in vitro disease-specific screen with 60 or more human tumor cell lines is used to search for molecules with novel mechanisms of action or activity against specific phenotypes. The Human Tumor Colony-Forming Assay (HTCA) uses fresh tumor biopsies as sources of cells that more nearly resemble the human disease. There is no doubt that the greatest successes of traditional chemotherapy have been in the leukemias and lymphomas. Since the earliest widely used in vivo drug screening models were the murine L 1210 and P388 leukemias, the community came to assume that these murine tumor models were appropriate to the discovery of "antileukemia" agents, but that other tumor models would be needed to discover drugs active against solid tumors.
Publisher: Springer Science & Business Media
ISBN: 1592597394
Category : Medical
Languages : en
Pages : 514
Book Description
This unique volume traces the critically important pathway by which a "molecule" becomes an "anticancer agent. " The recognition following World War I that the administration of toxic chemicals such as nitrogen mustards in a controlled manner could shrink malignant tumor masses for relatively substantial periods of time gave great impetus to the search for molecules that would be lethal to specific cancer cells. Weare still actively engaged in that search today. The question is how to discover these "anticancer" molecules. Anticancer Drug Development Guide: Preclinical Screening, Clinical Trials, and Approval, Second Edition describes the evolution to the present of preclinical screening methods. The National Cancer Institute's high-throughput, in vitro disease-specific screen with 60 or more human tumor cell lines is used to search for molecules with novel mechanisms of action or activity against specific phenotypes. The Human Tumor Colony-Forming Assay (HTCA) uses fresh tumor biopsies as sources of cells that more nearly resemble the human disease. There is no doubt that the greatest successes of traditional chemotherapy have been in the leukemias and lymphomas. Since the earliest widely used in vivo drug screening models were the murine L 1210 and P388 leukemias, the community came to assume that these murine tumor models were appropriate to the discovery of "antileukemia" agents, but that other tumor models would be needed to discover drugs active against solid tumors.
Atlas of Human Tumor Cell Lines
Author: Robert K.M. Hay
Publisher: Academic Press
ISBN: 1483288625
Category : Medical
Languages : en
Pages : 503
Book Description
Human tumor cells in culture are valuable for studying cancer causes and properties. This convenient reference provides useful information for cancer researchers on commonly used, established tumor cell lines of the major human organ systems. Atlas of Human Tumor Cell Lines includes data about morphological, metabolic, genetic, and growth characteristics of human tumor cells, with morphological characteristics presented in more than 250 photomicrographs. It also contains information for establishing and maintaining human tumor cell lines in culture, and each chapter covers future perspectives. - Covers well-characterized tumor cell lines from the major human organ systems - Presents over 250 photomicrographs, both phase-contrast and electron micrographs - Includes a list of key references for each chapter - Written by world-renowned experts
Publisher: Academic Press
ISBN: 1483288625
Category : Medical
Languages : en
Pages : 503
Book Description
Human tumor cells in culture are valuable for studying cancer causes and properties. This convenient reference provides useful information for cancer researchers on commonly used, established tumor cell lines of the major human organ systems. Atlas of Human Tumor Cell Lines includes data about morphological, metabolic, genetic, and growth characteristics of human tumor cells, with morphological characteristics presented in more than 250 photomicrographs. It also contains information for establishing and maintaining human tumor cell lines in culture, and each chapter covers future perspectives. - Covers well-characterized tumor cell lines from the major human organ systems - Presents over 250 photomicrographs, both phase-contrast and electron micrographs - Includes a list of key references for each chapter - Written by world-renowned experts
The Heterogeneity of Cancer Metabolism
Author: Anne Le
Publisher: Springer
ISBN: 331977736X
Category : Medical
Languages : en
Pages : 186
Book Description
Genetic alterations in cancer, in addition to being the fundamental drivers of tumorigenesis, can give rise to a variety of metabolic adaptations that allow cancer cells to survive and proliferate in diverse tumor microenvironments. This metabolic flexibility is different from normal cellular metabolic processes and leads to heterogeneity in cancer metabolism within the same cancer type or even within the same tumor. In this book, we delve into the complexity and diversity of cancer metabolism, and highlight how understanding the heterogeneity of cancer metabolism is fundamental to the development of effective metabolism-based therapeutic strategies. Deciphering how cancer cells utilize various nutrient resources will enable clinicians and researchers to pair specific chemotherapeutic agents with patients who are most likely to respond with positive outcomes, allowing for more cost-effective and personalized cancer therapeutic strategies.
Publisher: Springer
ISBN: 331977736X
Category : Medical
Languages : en
Pages : 186
Book Description
Genetic alterations in cancer, in addition to being the fundamental drivers of tumorigenesis, can give rise to a variety of metabolic adaptations that allow cancer cells to survive and proliferate in diverse tumor microenvironments. This metabolic flexibility is different from normal cellular metabolic processes and leads to heterogeneity in cancer metabolism within the same cancer type or even within the same tumor. In this book, we delve into the complexity and diversity of cancer metabolism, and highlight how understanding the heterogeneity of cancer metabolism is fundamental to the development of effective metabolism-based therapeutic strategies. Deciphering how cancer cells utilize various nutrient resources will enable clinicians and researchers to pair specific chemotherapeutic agents with patients who are most likely to respond with positive outcomes, allowing for more cost-effective and personalized cancer therapeutic strategies.
Methods in Mammary Gland Biology and Breast Cancer Research
Author: Margot M. Ip
Publisher: Springer Science & Business Media
ISBN: 9780306463976
Category : Medical
Languages : en
Pages : 366
Book Description
This book is a bench manual that provides in one volume all theimportant and unique technologies necessary to studies of mammarygland biology and breast cancer. The chapters are written by expertsin each area with an emphasis on nitty-gritty details that are keypoints for the successful use of a method. Sections include "in""vivo" model systems, special techniques for "in vivo"studies, "in vitro" model systems, and molecular analysis and genetransfer techniques.
Publisher: Springer Science & Business Media
ISBN: 9780306463976
Category : Medical
Languages : en
Pages : 366
Book Description
This book is a bench manual that provides in one volume all theimportant and unique technologies necessary to studies of mammarygland biology and breast cancer. The chapters are written by expertsin each area with an emphasis on nitty-gritty details that are keypoints for the successful use of a method. Sections include "in""vivo" model systems, special techniques for "in vivo"studies, "in vitro" model systems, and molecular analysis and genetransfer techniques.