This volume presents a collection of reviews derived from work presented at the Aegean Conference: "5th Crossroads Between Innate and Adaptive Immunity". This meeting was the fifth in a series, and assembled a team of scientists working on mechanisms by which the innate immune system of the host senses pathogens, the cellular and signaling networks that orchestrate the innate response and antigen presentation and adaptive immunity. The importance of the crosstalk between innate immunity and the adaptive immune response has only recently started to be appreciated. Although it is well recognized that dendritic cells, NK cells, NK-T cells and T cells are all critical for the host response to pathogens, the respective fields that study the biology of these immune cells tend to exist in parallel worlds with minimum exchange of information and ideas. This fragmentation hinders the integration of these fields towards a unified theory of host response. The Aegean Conference "Crossroads between Innate and Adaptive Immunity" brought together leading international scientists and experts to address critical areas of Innate and Adaptive Immunity, a necessary step in the development of more efficient scientific exchange and crosspollination between these fields. This conference attracted scientists from all over the world to discuss their latest findings on the various aspects of Innate and Adaptive Immunity, and maximized scientific interchange through lecture presentations, poster sessions and informal discussions.

The ability to remember an antigenic encounter for several decades, even for a life time, is one of the fundamental properties of the immune system. This phenomenon known as "immunological memory," is the foundation upon which the concept if vaccination rests. Therefore, understanding the mechanisms by which immunological memory is regulated is of paramount importance. Recent advances in immunology, particularly in the field of innate immunity, suggest that the innate immune system plays fundamental roles in influencing immunological memory. Indeed, emerging evidence suggests that events that occur early, within hours if not minutes of pathogen or vaccine entry profoundly shape the quantity, quality and duration of immunological memory. The present volume assembles a collection of essays from leading experts that span the entire spectrum research from understanding the molecular mechanisms of innate immune recognition, to dendritic cell function, to the generation and maintenance of antigen-specific B and T-cell responses.

This volume presents a collection of reviews derived from work presented at the Aegean Conference: "4th Crossroads between innate and adaptive immunity". This meeting was the fourth in a series, and assembled a team of scientists working on mechanisms by which the innate immune system of the host senses pathogens, the cellular and signaling networks that orchestrate the innate response and antigen presentation and adaptive immunity. The importance of the crosstalk between innate immunity and the adaptive immune response has only recently started to be appreciated. Although it is well recognized that dendritic cells, NK cells, NK-T cells and T cells are all critical for the host response to pathogens, the respective fields that study the biology of these immune cells tend to exist in parallel worlds with minimum exchange of information and ideas. This fragmentation hinders the integration of these fields towards a unified theory of host response. The Aegean Conference "Crossroads between Innate and Adaptive Immunity" brought together leading international scientists and experts to address critical areas of Innate and Adaptive immunity something necessary for the development of more efficient scientific exchange and crosspollination between these fields. This conference attracted scientists from all over the world to discuss their latest findings on the various aspects of Innate and Adaptive immunity. The conference had limited participation and a scientific and social program that maximized scientific interchange through lecture presentations, poster sessions and informal discussions.

This compilation presents mini-reviews derived from work presented at the Aegean Conference: "First Crossroads between Innate and Adaptive Immunity," which occurred in October, 2005 at the Hilton Conference Center on the island of Rhodes, Greece. The conference included sessions dedicated to host recognition of and response to pathogens, innate immune networks, antigen presentation, and adaptive immune responses, each headlined by a leading scientist.

Aegean Conferences is an independent, nonprofit, educational organization directed and managed by the scientific community. The board is made up of nine researchers/scientists in various disciplines from Harvard, Brown, University of Pennsylvania, UCSD, Princeton, Biovista and the Foundation for Biomedical Research Academy of Athens. The board both invites and approves unsolicited proposals for Conferences in all fields of Science, Engineering, Arts, and Humanities. The purpose of the Conferences is to bring together individuals with common interests to examine the emerging and most advanced aspects of their particular field.

This volume will include mini-reviews derived from work to be presented at the Aegean Conference: Second Crossroads between Innate and Adaptive Immunity, in Crete, Greece, June 17-22, 2007. This meeting is designed to serve as a forum to discuss the most recent progress in complement research as it pertains to human disease pathogenesis and therapeutics. The rapid pace of development in complement basic research and the advent and application of new experimental approaches in this field have now allowed us to take an integrated view of the in vivo biology of the complement system. The availability of new reagents (e.g. synthetic and recombinant inhibitors) and animal models (e.g. transgenic and knockout mice) has enabled us to address, in an in vivo setting, its involvement in various pathophysiological conditions. Such studies are shedding new light on the pathogenetic mechanism of complement-related diseases such as autoimmune diseases and inflammatory tissue damage as well as defining new areas of high interest such as the developmental biology of complement. They also provide the basis for developing new therapeutic strategies for these diseases through manipulation of in vivo complement activity. This volume will serve as a resource where the latest development in these specific areas will be discussed in a more focused and detailed manner.

This volume presents a collection of reviews derived from work presented at the Aegean Conference: "3rd Crossroads between innate and adaptive immunity" which occurred during September 27 - October 2, 2009 at the Minoa Palace Conference Center in Chania, Crete, Greece. This meeting was the third in a series, and assembled a team of scientists working on mechanisms by which the innate immune system of the host senses pathogens, the cellular and signaling networks that orchestrate the innate response and antigen presentation and adaptive immunity. The various facets of the innate response, including dendritic cells, T cells, B cells, NK cells, NK-T cells and the complement cascade during the host response to pathogens and tumors is only now starting to be elucidated. The respective fields that focus on these immune cells and molecules have tended to be relatively compartmentalized, and yet emerging evidence points to the interconnectedness of these facets in coordinating the innate response, and its subsequent impact on the adaptive response. The goal of this conference was to initiate cross-talk between these diverse immunological fields, and promote and facilitate discussion on the interactions between the innate immune response and the adaptive immune response and ultimately facilitate collaboration between these areas of study. Following on the footsteps of the outstanding success of its precursors, the "3rd Crossroads between Innate and Adaptive Immunity" Aegean Conference was highly successful in bringing together and connecting scientists and experts from around the world to address critical areas of Innate and Adaptive immunity.