Gap junctional communication in health and disease

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Gap junctional communication in health and disease

Gap junctions (GJ) provide intercellular communication in all multicellular animal species, being as evolutionary distant as worm and men. In the traditional view GJs are known as specialized cell junctions forming communicating channels connecting the cytoplasm of adjacent cells. In almost all tissues GJ coupled cells can rapidly exchange ions, nutrients, or small metabolites to establish elec...

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Gap-junctional communication in a communication-defective and in a communication-competent teratocarcinoma cell line.

We examined the gap-junctional communication properties of a communication-defective cell line R5/3 and its communication-competent revertant H2T12. For these studies, we carried out microelectrode impalements to monitor ionic coupling and dye coupling. Our dye-injection experiments revealed that the H2T12 cells are much more efficient in dye coupling than the R5/3 cells. This latter observatio...

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Gap junctional intercellular communication and cellular response to heat stress.

Gap junctional intercellular communication (GJIC) is essential in the maintenance of tissue homeostasis and has been implicated in tumor suppression. Recent studies have indicated that GJIC is also involved in cellular stress responses to low dose ionizing radiation, UV light and hydrogen peroxide. However, the contribution of GJIC to the heat stress response has not yet been elucidated. We her...

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Activity-Dependent Neuronal Control of Gap-Junctional Communication in Astrocytes

A typical feature of astrocytes is their high degree of intercellular communication through gap junction channels. Using different models of astrocyte cultures and astrocyte/neuron cocultures, we have demonstrated that neurons upregulate gap-junctional communication and the expression of connexin 43 (Cx43) in astrocytes. The propagation of intercellular calcium waves triggered in astrocytes by ...

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Gap junctional communication modulates gene expression in osteoblastic cells.

Bone-forming cells are organized in a multicellular network interconnected by gap junctions. In these cells, gap junctions are formed by connexin43 (Cx43) and connexin45 (Cx45). Cx43 gap junctions form pores that are more permeable to negatively charged dyes such as Lucifer yellow and calcein than are Cx45 pores. We studied whether altering gap junctional communication by manipulating the relat...

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ژورنال

عنوان ژورنال: Frontiers in Physiology

سال: 2014

ISSN: 1664-042X

DOI: 10.3389/fphys.2014.00442