Ramkrishna Sen
Biosurfactants are surface active amphiphilic molecules derived either through the route of microbial fermentations or through the in-vitro enzyme catalyzed reactions. Like synthetic surfactants, biosurfactants are also characterized by their ability to reduce surface tension or interfacial tension between immiscible fluid phases and to form micelles and reverse micelles at the critical micelle concentrations. They constitute an important class of environment friendly biotechnology products with tremendous potential for commercial and health-care applications. Biosurfactants have been very popular for their biodegradability, non- or mild toxicity and also for their potential commercial... continue reading
..The early detection of human cancer is still one of the great challenges in the battle against this disease. Single biomarkers are not likely to provide sufficient diagnostic power and multibiomarker assays should be developed in order to reach high diagnostic accuracy for cancer screening at the population level. Omics technologies are emerging new biomarker discovery tools and have a high potential to yield panels of novel and cancer-specific biomarkers. This book provides an overview of recent studies aimed at the discovery of new cancer biomarkers through omics-based approaches, including genomics, transcriptomics, proteomics, metabonomics, peptidomics, phosphoproteomics, immunomics, glycoproteomics, lipidomics, bioinformatics and integrative omics technologies. The book serves as an introduction to researchers in the field and provides the platforms to facilitate the development of new approaches in cancer research.
...This book, Islet Cell Growth Factors, provides a timely contribution to the current thinking regarding the concepts in the area of islet cell regeneration with special reference to insulin secreting beta cells. The contributions are from leaders in the field with a long-standing interest in the area of islet biology.
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..In the first chapter Drs. Dirice and Kulkarni provide a broad introduction to the topic of islet cell regeneration with a focus on growth factor pathways, especially the insulin and insulin-like growth factor signaling mechanisms affecting beta cells in Type 1, Type 2 and gestational diabetes. This is followed by a contribution by Drs. Granot and Dor who describe an elegant lineage-trace model to confirm that proliferation is one of the major mechanisms underlying beta-cell regeneration in adult rodents. These findings are backed up by Drs. Georgia and Bhushan on cell cycle control in beta cells. Subsequent chapters are focused on proteins downstream of the growth factor pathways in the regulation of beta-cell biology. Thus, Drs. Ham and Stoffers discuss the role of the homeodomain protein, Pdx-1, on beta-cell growth while Dr. Bernal-Mizrachi describes the significance of Akt in beta-cell growth and function. Finally, Drs. Kitamura, Kitamura and Accili highlight the importance of the forkhead protein, FoxO1, in pancreatic betacells.
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..In addition to insulin and IGF-I, several other growth factors play an important role in modulating beta-cell growth. The pathway utilized by the hepatocyte growth factor is discussed by Drs. Gonzalez-Perusa, Alonso and Garcia-Ocana. The significance of pathways relevant for beta-cell proliferation and apoptosis during pregnancy and the postnatal period is nicely presented by Drs. Fujinaka, Wang, Matsushita and Vasavada. Together these chapters provide a comprehensive and mechanistic view of the signaling pathways that are relevant for mammalian beta-cell proliferation. This is an excellent book for the research scientist who is planning studies in the area of beta-cell regeneration and also provides the clinician with a view to the potential pathways that may participate in human beta-cell growth.
..• Discusses TP53 Mutations in Human Cancers
...• Includes a chapter on the regulation and function of the original p53-Inducible p21 Gene
...• Presents key ideas in the field
...The first edition of this book, Basic Concepts in Organ Procurement, Perfusion and Preservation for Transplantation, was published 27 years ago, in 1982 when organ procurement and preservation began to advance in the study of the best ways to preserve organs for transplantation. The second edition, Organ Procurement and Preservation for Transplantation, 2nd Edition, followed 15 years later, in 1997, with the goal of finding common denominators in the best preservation techniques for transplantation. In this current third edition, 11 years after the second edition, similar goals are still pursued of defining the best preservation methods, but there is now more evidence, including results, and new advances have reached publication and are being incorporated into ischemia and reperfusion techniques and organ preservation studies. Many preservation solutions have been introduced, important preservation solution components have been better defined, and improved perfusion methods are being considered, especially for the increasing number of organ donors with non-beating hearts who are being sought for transplantation.
...This edition (2009) engaged experts in the field of organ preservation to review, update, and rewrite each of the chapters. Crafted in collaboration with Luis H. Toledo-Pereyra, the text is eminently informative and easily understandable. Each solid organ that can be transplanted has an entire chapter devoted to the particular methods of its preservation. One chapter apiece, in other words, features insights on the preservation of the kidney, the liver, the pancreas, the small bowel, the heart, and the heart-lung.
...The title of the present book has been shortened to better represent its content. Thus, Organ Preservation for Transplantation, 3rd Edition, demonstrates a more accurate depiction of its current status. Nevertheless, the goal of this book remains exactly the same as in the first edition, that is “to analyze the most important aspects of organ procurement, perfusion and preservation for transplantation”.
...Substantial proportions of the genome of most eukaryotes, including those of metazoan parasites, are comprised of repetitive sequences. Mobile genetic elements (MGEs) constitute much of the repetitive component, particularly the interspersed sequences. This volume of nine chapters addresses MGEs that have colonized the genomes of medically important metazoan parasites and their vectors. These MGEs are parasites of parasites. These mobile elements are compared and contrasted with those from better-studied model organisms. The authors have included plentiful, relevant, and informative illustrations and references.
...Several chapters focus on mobile elements of the human schistosomes. Gerardo Ferbeyre focuses on the putative ribozyme activities on the SM alpha elements, SINE-like elements, including trans reactions catalyzed by these retroposons. Ricardo DeMarco and Sergio Verjovski-Almeida review the cut-and-paste transposons of schistosomes, including the Merlin and the SmTRC1 elements, and application of schistosome DNA transposons to transgenesis and mutagenesis. Claudia Copeland, Thewarach Laha and I review the retrovirus-like retrotransposons and non-long terminal repeat transposable elements of the schistosomes, including the Boudicca, fugitive and SR2 elements. Young-An Bae and Yoon Kong provide descriptions of retrotransposons from the human liver and lung flukes, Clonorchis sinensis and Paragonimus westermani, respectively, including the CsRn1 long terminal repeat retrotransposon. Continuing the investigations of MGEs of parasitic worms, Thewarach Laha, Alex Loukas and I summarize current knowledge of MGEs from hookworms, including details of the bandit and Transib transposons and dingo retrotransposons.
...Mobile elements in vectors of human parasites are also covered. Matty Knight and coauthors describe the nimbus retrotransposon and its discovery and other repetitive elements from the genome of the gastropod snail Biomphalaria glabrata, the intermediate host of Schistosoma mansoni. Zhijian Tu and Song Ti review MGEs of Anopheles mosquitoes, vectors of malaria, and other mosquitoes. They discuss practical uses of these MGEs. Craig Coates provides an expert article on transposon mediated transgenesis of mosquitoes, in particular dealing with his pioneering studies on the deployment of binary systems with the Mos1 mariner transposon.
...MGEs from the genomes of these metazoan parasites have practical uses in transgenesis and epidemiological studies and also are valuable for annotation of the genomes of these vectors and pathogens. These issues and future directions are well covered in these chapters.
...The human body is made up of trillions of tiny cells that cannot be seen by the naked eye. The functioning units inside these cells are macromolecules that need to travel in the three-dimensional cell-space to distances ten thousand times their size. This movement is highly ordered, requires energy and takes place on molecular tracks that serve as a sophisticated transport system—somewhat equivalent to the multimodal rail-highway-river networks of large metropolises. All the systems of the human body depend on the efficient delivery of macromolecules to their right destination at the right time—both within and between cells. Breakdown of this traffic system results in a variety of diseases including diabetes, cancer and heart disease, as well as immunological, neurological and developmental disorders. During the last half a century, scientists have made a quantum leap in unraveling the mysteries of trafficking inside cells. The three sections of this book together cover the past, present and future of this rapidly developing and intriguing field.
...Protein transport into the endoplasmic reticulum (ER) is just one aspect of the general cell biology topic of intracellular protein sorting. This larger picture also includes protein transport into other organelles of the eukaryotic cell (chloroplasts, mitochondria, nucleus, peroxisomes), protein export from bacteria, vesicular transport that delivers to its final destination most of what has been transported into the ER, and protein export from the ER that is associated with protein degradation (termed ERAD). Over the years, protein transport into the ER also has become part of the quest to understand the various roles of molecular chaperones under non-stress conditions and of the ribosomal tunnel exit as the decisive site for molecular triage of nascent polypeptide chains.
...Both from a morphological and a functional point of view, the nucleus is central to modern cell biology. Transport of proteins and RNAs between the nucleus and the cytoplasm continues to be a fascinating research topic on its own. Furthermore, it affects many aspects of gene expression and general cellular functions and has far-reaching implications for human health.
..In this book, we cover a wide range of topics from the nuclear transport field. Individual chapters deal with the general concepts of nucleocytoplasmic transport, with various transport pathways like nuclear protein import, mRNA export and tRNA trafficking, and with the molecular mechanisms that govern macromolecular exchange between the two compartments. Others address new technologies that will help to answer open questions in the future. Together, we hope to provide a collection of reviews that should be useful for experts in the field, as well as for a wider audience.
..Cockayne syndrome (CS) is a rare autosomal genetic disorder that was first identified almost 62 years ago by Alfred Cockayne and was named after him. The earliest publication record (PubMed) available is a paper by Marie et al in 1958. Since then 815 research papers including excellent reviews have been published (PubMed, December 2008), yet we are a long way from fully understanding the exact molecular mechanisms of this disease. Ironically, like many other inborn genetic defects, CS is still incurable; the mean life expectancy of the patients is 12.5 years. Major milestones in the study of CS were the discovery that the patients have a defect in DNA repair, the identification of the two complementation groups CSA and CSB, and the finding that CS cells were defective in the specialized pathway of nucleotide excision repair, transcriptional-coupled repair (TCR), that removes certain lesions from actively transcribed DNA. The editor of this book (SIA) has considerable interest in this field; recent studies have revealed a number of new enzymes (unpublished data) that may be responsible for the scavenge of ROS. Our future studies might show if deficiency of any of these newly discovered enzymes (as a result of genetic mutations) may lead to the neurodegeneration and other ROS‑induced diseases. We hope that this book will stimulate both experts and novice researchers in the field with excellent overview of the current status of research and pointers to future research goals. The insights gained may also be valuable for the development of new therapeutic regimens for dealing with the clinical problems raised by this rare but devastating human condition.
...Cell migration is an extremely complex but also a carefully orchestrated process. It involves the constant reconstruction of the cell shape, in order to adapt to an ever‑changing plethora of external and internal stimuli. Time lapse movies of migrating cells often demonstrate a vigorous ruffling activity of the plasma membrane at the cell periphery, specifically at the forefront of the cells. From the film pictures, the motor underlying these activities might seem to be the flow of membranes and the “lipid flow model” for cell migration got a lot of attention during the eighties. The model stated that cell migration is primarily driven by a flow of lipid vesicles from the rear end to the leading end of the cells and it also stated an intimate relation between cell migration and the endocytic cycle. However, this model turned out to be, if not entirely wrong, at least incomplete, since it failed to take into account the activity of the cytoskeleton. We have barely started to recognise the mechanisms underlying the communication between the machinery for membrane dynamics and the regulators of cytoarchitecture. However, it is my sincere hope that this book will help to convince the reader that numerous vital cellular processes occur at the interface between lipid bilayers and proteins.
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