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The purinergic P2X7 ion channel receptor - a 'repair' receptor in bone

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Vis graf over relationer

A strong skeleton relies on adaptation to varying physical demands and on maintenance of the bone tissue in order to avoid accumulation of micro-damage. In bone, the purinergic P2X7 ion channel receptor is expressed on both cells of the stromal lineage such as the bone forming osteoblasts and the mechano-sensing osteocytes and on cells belonging to the immune-related monocyte-macrophage lineage, the bone resorbing osteoclasts. Recent studies have demonstrated that the receptor plays important roles in the anabolic responses to mechanical loading on bone and, together with the pannexin1 hemi-channel, in the process of initiating bone remodeling in response to micro-damage. Thus, the receptor is crucial in skeletal mechano-transduction and in the continuous repair process. However, under pathophysiological conditions such as diabetes with high glucose concentrations or glucocorticoid-treatment the receptor is downregulated thus blunting the important effects it has for maintaining a healthy and strong skeleton.

OriginalsprogEngelsk
TidsskriftCurrent Opinion in Immunology
Vol/bind52
Sider (fra-til)32-38
Antal sider7
ISSN0952-7915
DOI
StatusUdgivet - jun. 2018

ID: 55802908