Abstract
Several types of communication coordinate body functions to maintain homeostasis. Clarifying intercellular communication systems is as important as intracellular signal mechanisms. In this study, we propose an intercellular network model to establish novel targets in GEP-endocrine system, based on up-to-date information from medical publications. As materials, two physiologic events which are Pavlov's sham-feeding assay and bicarbonate secretion into the duodenum from pancreas were explored by new biologic data from the literature. Major key words used in Pub-Med were modes of regulations (autocrine, paracrine, endocrine, neurocrine, juxtacrine, lumencrine), GEP cells, hormones, peptides and neuro-transmitters. In these two examples of physiologic events, we can design a model of network to clarify transmission of a message. When we take a simple, unique message, we can observe a complete intercellular network. In our examples, these messages are "food is coming" and "hydrogen ions are increasing" in human language (humanese). We need to find molecular counterparts of these unique messages in cell language (cellese). In this network (message-adjusted network; MAN), message is an input which can affect the physiologic equilibrium, mission is an output to improve the disequilibrium and aim is always maintenance of homeostasis. If we orientate to a transmission of a unique message we can distinguish that different cells use different chemical messengers in different modes of regulations to transmit the same message. This study also supports Shannon's information theory and cell language theories such as von Neumann-Patte principles. After human genome project (HU-GO) and protein organisations (HU-PO), finding true messages and the establishment of their networks (in our model HU-MAN project) can be a novel and exciting field in cell biology. We established an intercellular network model to understand intercellular communication in the physiology of GEP endocrine system. This model could help to explain complex physiologic events as well as to generate new treatment concepts.
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