Michael Fromm – författare

Tight junctions between epithelial and endothelial cells form selective barriers and paracellular channels and regulate paracellular transport of solutes, immune cells, and drugs. More specifically, tight junctions consist of proteins that laterally interconnect neighboring cells of epithelia and endothelia. Certain proteins seal the tight junction, so that a nearly impermeable barrier develops, whereas others form channels that allow for permeation between the cells. Recent investigations have focused on tight junction proteins, belonging to the claudin family (claudins-1 to -27 in humans) and the newly defined group of TAMP (three proteins: occludin, Marvel-D2, and tricellulin).  Barriers and Channels Formed by Tight Junction Proteins I showcases work in this area clustered around three major themes: the molecular properties of tight junctions, for example, the role of the claudin family of proteins and the formation of ion and charge-selective channels; the regulation of tight junction and barrier functions via genetic mechanisms and scaffold protein mediation; and the functional role of the tight junction in various tissues, such as the skin, lungs, endothelia, and nervous systemNOTE: Annals volumes are available for sale as individual books or as a journal. For informatio.n on institutional journal subscriptions, please visit http://ordering.onlinelibrary.wiley.com/subs.asp?ref=1749-6632&doi=10.111/(ISSN)1749-6632.ACADEMY MEMBERS: Please contact the New York Academy of Sciences directly to place your order (www.nyas.org). Members of the New York Academy of Science receive full-text access to the Annals online and discounts on print volumes. Please visit http://www.nyas.org/MemberCenter/Join.aspx for more information about becoming a member.

Tight junction proteins connect epithelial and endothelial cells and, importantly, form selective barriers and channels for paracellular transportation.  Two types of tight junction proteins—the claudin family (claudins-1 to -27) and the TAMP family (occludin, Marvel-D2, and tricellulin)—can be distinguished molecularly and functionally.  Recent work has focused on delineating the functional significance of differences in selective permeability, for example, by examining the regulatory mechanisms of tight junctions.  This work is of great clinical importance as many inflammatory or infectious diseases are characterized by increased permeability and the manipulation of tight junctions presents a new horizon in the development of novel therapeutics.  The volume Barriers and Channels Formed by Tight Junction Proteins II provides a detailed look at the recent advances in our understanding of tight junction regulation and dysregulation.  The papers included focus on three major themes: inflammation and gastrointestinal function; epithelial transport, barrier modulation, and food components; and tight junctions in intestinal and renal epithelia.NOTE: Annals volumes are available for sale as individual books or as a journal. For more information on instutional journal subscriptions, please visit http://ordering.onlinelibrary.wiley.com/subs.asp?ref=1749-6632&doi=10.111/(ISSN)1749-6632ACADEMY MEMBERS: Please contact the New York Academy of Sciences directly to place your order (www.nyas.org). Members of the New York Academy of Science receive full-text access to Annals online and discounts on print volumes. Please visit http://www.nyas.org/MemberCenter/Join.aspx for more information on becoming a member.

Die Anwendungspotentiale und -voraussetzungen des unternehmensubergreifenden ISDN-Einsatzes sind bisher noch weitgehend unerschlossen. Die beteiligten Unternehmen stehen vor erheblichen Koordinationsproblemen in bezug auf die Organisation der Datenwege und der Datenstandardisierung. Bewahrte Losungen hierfur gibt es nicht, und insofern ist hier von einer "Organisationslucke" auszugehen. Wenn es als Voraussetzung einer uberbetrieblichen Vernetzung eines Interessenausgleichs zwischen den beteiligten Unternehmen bedarf und somit letztlich auch Fragen der Verfugungsrechte beruhrt sind, besteht hier zusatzlich eine "institutionelle Lucke", die es durch geeignete vertragliche Losungen zu schliessen gilt. Durch die Untersuchung der Konzeption und Umsetzung einer unternehmensubergreifenden Vernetzung auf ISDN-Basis ist es gelungen, neue Aufschlusse uber das Anwendungspotential von ISDN zu gewinnen.