Lipoproteins carry endocannabinoids that inhibit the Hedgehog pathway
Lipoproteins carry endocannabinoids that inhibit the Hedgehog pathway
复制标题
脂蛋白携带抑制 Hedgehog 通路的内源性大麻素
DOI:
10.1101/000570
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Shevchenko
中科院分区:
文献类型:
--
作者:
Khaliullina;Sampaio;Shevchenko
Hedgehog proteins are lipid-modified secreted signaling molecules that regulate tissue development and homeostasis. Lipids contained in circulating lipoproteins repress the Hedgehog signaling pathway in the absence of Hedgehog ligand, but the identity of these lipids is unknown. Here, using biochemical fractionation and lipid mass spectrometry, we identify these inhibitory lipids as endocannabinoids. Endocannabinoids are present in lipoproteins of both flies and humans, and repress the pathway in both mammalian signaling assays andDrosophilawing imaginal discs. InDrosophila, endocannabinoids are requiredin vivoto keep the levels of Smoothened and full-length Cubitus interruptus (Ci155) low in the absence of Hedgehog. Furthermore, elevating their endogenous levels inhibits Hedgehog-dependent accumulation of Smoothened and Ci155. Interestingly,cannabis-derived phytocannabinoids are also potent pathway inhibitors in flies and mammals. These findings constitute a novel link between organismal metabolism and local Hedgehog signaling, and suggest previously unsuspected mechanisms for the broad physiological activities of cannabinoids.
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