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The involvement of orexin-1 receptors in modulation of feeding and anxiety-like behavior in rats with complete Freund's adjuvant-induced temporomandibular joint disorder.
Odontology
January 2025
Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Orexin-A (OXA), a neuropeptide produced in the hypothalamus, is recognized for its role in modulating orofacial nociception and regulating feeding behaviors, as well as its impact on psychophysiological responses. This study investigated the role of orexin-1 receptors (OX1R) in modulating nociceptive behaviors induced by noxious stimulation of the temporomandibular joint (TMJ) and the associated changes in mood and feeding behaviors in rats with complete Freund's adjuvant (CFA)-induced temporomandibular disorders (TMDs). Bilateral cannulation of the lateral ventricles was performed in rats.
View Article and Find Full Text PDFDeficiency of orexin receptor type 1 in dopaminergic neurons increases novelty-induced locomotion and exploration.
Elife
January 2025
Max Planck Institute for Metabolism Research, Department of Neuronal Control of Metabolism, Cologne, Germany.
Orexin signaling in the ventral tegmental area and substantia nigra promotes locomotion and reward processing, but it is not clear whether dopaminergic neurons directly mediate these effects. We show that dopaminergic neurons in these areas mainly express orexin receptor subtype 1 (Ox1R). In contrast, only a minor population in the medial ventral tegmental area express orexin receptor subtype 2 (Ox2R).
View Article and Find Full Text PDFDopamine Drives Feedforward Inhibition to Orexin Feeding System, Mediating Weight Loss Induced by Morphine Addiction.
Adv Sci (Weinh)
January 2025
Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, China.
Feeding behavior changes induced by opioid addiction significantly contribute to the worsening opioid crisis. Activation of the reward system has shown to provoke binge eating disorder in individuals with opioid use disorder, whereas prolonged opioid exposure leads to weight loss. Understanding the mechanisms underlying these phenomena is essential for addressing this pressing societal issue.
View Article and Find Full Text PDFThe Role and Mechanisms of the Hypocretin System in Zebrafish ().
Int J Mol Sci
December 2024
A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 690041 Vladivostok, Russia.
Sleep is the most important physiological function of all animals studied to date. Sleep disorders include narcolepsy, which is characterized by excessive daytime sleepiness, disruption of night sleep, and muscle weakness-cataplexy. Narcolepsy is known to be caused by the degeneration of orexin-synthesizing neurons (hypocretin (HCRT) neurons or orexin neurons) in the hypothalamus.
View Article and Find Full Text PDFTargeting CD200 in Breast Cancer: Opportunities and Challenges in Immunotherapeutic Strategies.
Int J Mol Sci
December 2024
Vascular Biology Program, Department of Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
One of the key factors that contribute to tumor progression and resistance is the immunosuppressive microenvironment of the tumor. CD200 is a recently identified cell surface glycoprotein recognized as an important molecule in breast cancer for its versatile modulation of the immune response via its receptor, CD200R. The interaction between CD200 and CD200R suppresses the immune activities against tumor cells and allows them to be undetected and, in doing so, to escape from the destructive capability of the immune cells.
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