“…Frontiers in Pharmacology frontiersin.org Noda and Nabeshima, 2004;Glass, 2011;Fluyau et al, 2020), muscarinic receptors (Marshall and Buccafusco, 1987;Holland et al, 1993), corticotropin-releasing factor (CRF) receptor (CRF1) (García-Carmona et al, 2015), tachykinin receptors (Michaud and Couture, 2003), voltage-gated Ca 2+ -channels (Tokuyama et al, 1995;Dogrul et al, 2002;Esmaeili-Mahani et al, 2008;Alboghobeish et al, 2019), adenylyl cyclase superactivation and opioid receptor phosphorylation (Avido-Reiss et al, 1996;Avido-Reiss et al, 1997;Wang et al, 1999;Eckhardt et al, 2000), oxidative stress (Xu et al, 2006;Mori et al, 2007;Abdel-Zaher et al, 2013;Mansouri et al, 2020;Ward et al, 2020;Houshmand et al, 2021), and the nitric oxide-cGMP signaling cascade (Adams et al, 1993;Cappendijk et al, 1993;Majeed et al, 1994;Vaupel et al, 1995a;Buccafusco et al, 1995;Vaupel et al, 1995b;Herman et al, 1995;Leza et al, 1995;London et al, 1995;Dambisya and Lee, 1996;Bhatt and Kumar, 2015;Tsakova et al, 2015;Sackner et al, 2019;Gledhill and Babey, 2021). Since L-CYSee blunted the expression of all NLXprecipitated behavioral (except for sneezing), physical (body weight loss and hypothermia), and cardiorespiratory (hypertension, tachycardia, and incidence of apneas) phenomena, it is tempting to assume that L-CYSee interrupts fun...…”