FAAH, but not MAGL, inhibition modulates acute TLR3-induced neuroimmune signaling in the rat, independent of sex. Flannery, L. E., Henry, R. J., Kerr, D. M., Finn, D. P., & Roche, M. Journal of Neuroscience Research, 96(6):989–1001, 2018. doi abstract bibtex Toll-like receptor (TLR)3 is a key component of the innate immune response to viral infection. The present study firstly examined whether sex differences exist in TLR3-induced inflammatory, endocrine, and sickness responses. The data revealed that TLR3-induced expression of interferon- or NFkB-inducible genes (IFN-α/β, IP-10, or TNF-α), either peripherally (spleen) or centrally (hypothalamus), did not differ between male and female rats, with the exception of TLR3-induced IFN-α expression in the spleen of female, but not male, rats 8 hr post TLR3 activation. Furthermore, TLR3 activation increased plasma corticosterone levels, induced fever, and reduced locomotor activity and body weight - effects independent of sex. Thus, the acute-phase inflammatory, endocrine, and sickness responses to TLR3 activation exhibit minimal sex-related differences. A further aim of this study was to examine whether enhancing endocannabinoid tone - namely, 2-arachidonylglycerol (2-AG) or N-arachidonoylethanolamine (AEA), exhibited similar effects on TLR3-induced inflammatory responses in male versus female rats. Systemic administration of the monoacylglycerol lipase (MAGL) inhibitor MJN110 and subsequent increases in 2-AG levels did not alter the TLR3-induced increase in IP-10, IRF7, or TNF-α expression in the spleen or the hypothalamus of male or female rats. In contrast, the fatty acid amide hydrolase (FAAH) inhibitor URB597 increased levels of AEA and related N-acylethanolamines, an effect associated with the attenuation of TLR3-induced inflammatory responses in the hypothalamus, but not the spleen, of male and female rats. These data support a role for FAAH, but not MAGL, substrates in the modulation of TLR3-induced neuroinflammatory responses, effects independent of sex.
@article{flannery_faah_2018,
title = {{FAAH}, but not {MAGL}, inhibition modulates acute {TLR3}-induced neuroimmune signaling in the rat, independent of sex},
volume = {96},
issn = {1097-4547},
doi = {10.1002/jnr.24120},
abstract = {Toll-like receptor (TLR)3 is a key component of the innate immune response to viral infection. The present study firstly examined whether sex differences exist in TLR3-induced inflammatory, endocrine, and sickness responses. The data revealed that TLR3-induced expression of interferon- or NFkB-inducible genes (IFN-α/β, IP-10, or TNF-α), either peripherally (spleen) or centrally (hypothalamus), did not differ between male and female rats, with the exception of TLR3-induced IFN-α expression in the spleen of female, but not male, rats 8 hr post TLR3 activation. Furthermore, TLR3 activation increased plasma corticosterone levels, induced fever, and reduced locomotor activity and body weight - effects independent of sex. Thus, the acute-phase inflammatory, endocrine, and sickness responses to TLR3 activation exhibit minimal sex-related differences. A further aim of this study was to examine whether enhancing endocannabinoid tone - namely, 2-arachidonylglycerol (2-AG) or N-arachidonoylethanolamine (AEA), exhibited similar effects on TLR3-induced inflammatory responses in male versus female rats. Systemic administration of the monoacylglycerol lipase (MAGL) inhibitor MJN110 and subsequent increases in 2-AG levels did not alter the TLR3-induced increase in IP-10, IRF7, or TNF-α expression in the spleen or the hypothalamus of male or female rats. In contrast, the fatty acid amide hydrolase (FAAH) inhibitor URB597 increased levels of AEA and related N-acylethanolamines, an effect associated with the attenuation of TLR3-induced inflammatory responses in the hypothalamus, but not the spleen, of male and female rats. These data support a role for FAAH, but not MAGL, substrates in the modulation of TLR3-induced neuroinflammatory responses, effects independent of sex.},
language = {eng},
number = {6},
journal = {Journal of Neuroscience Research},
author = {Flannery, Lisa E. and Henry, Rebecca J. and Kerr, Daniel M. and Finn, David P. and Roche, Michelle},
year = {2018},
pmid = {28726298},
keywords = {Amidohydrolases, Animals, Arachidonic Acids, Body Temperature, Carbamates, Chemokine CXCL10, Corticosterone, Endocannabinoids, Estradiol, Ethanolamines, Female, Glycerides, Immunologic Factors, Interferons, Male, Monoacylglycerol Lipases, NF-kappa B, Oleic Acids, Palmitic Acids, Poly I-C, Rats, Rats, Sprague-Dawley, Sex Factors, Signal Transduction, Succinimides, TLR, Toll-Like Receptor 3, cannabinoid, hypothalamus, neuroimmune, viral},
pages = {989--1001},
}
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