Abstract:
:Phospholipase C is a key enzyme in phosphoinositide turnover. Although its functions have been extensively studied at the cellular level, many questions remain concerning its functions at the organ and individual animal levels. Here we demonstrate that mice lacking phospholipase Cδ1 develop granulocytosis associated with elevated serum levels of the granulopoietic cytokine interleukin-17. Re-introduction of phospholipase Cδ1 into keratinocytes of phospholipase Cδ1-deficient mice reverses this phenotype, whereas conditional ablation of phospholipase Cδ1 in keratinocytes recreates it. Interleukin-17 and its key upstream regulator interleukin-23 are also upregulated in epidermis. Loss of phospholipase Cδ1 from keratinocytes causes features of interleukin-17-associated inflammatory skin diseases. Phospholipase Cδ1 protein is downregulated in the epidermis of human psoriatic skin and in a mouse model of psoriasis. These results demonstrate that phosphoinositide turnover in keratinocytes regulates not only local inflammatory responses but also serum cytokine levels and systemic leukocyte counts, and affects distant haematopoietic organs.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kanemaru K,Nakamura Y,Sato K,Kojima R,Takahashi S,Yamaguchi M,Ichinohe M,Kiyonari H,Shioi G,Kabashima K,Nakahigashi K,Asagiri M,Jamora C,Yamaguchi H,Fukami Kdoi
10.1038/ncomms1960subject
Has Abstractpub_date
2012-07-17 00:00:00pages
963issn
2041-1723pii
ncomms1960journal_volume
3pub_type
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