Abstract The structural and thermal properties of chitin chitosan isolated from different sources ( Artemia sp.cysts (from the Aral Sea) Silkworm pupae (Bombyx mori) ) were studied by using FTIR, XRD, DSC. It is shown, that samples have a similar structure, however, depending on differ in ratio phase composition. Two types crystalline modification structure α -and β-modifications are observed f...

In the nervous system, the interaction of opioids like morphine and its derivatives, with the G protein-coupled Mu-opioid receptor (MOR) provokes the development of analgesic tolerance, as well as physical dependence. Tolerance implies that increasing doses of the drug are required to achieve the same effect, a phenomenon that contributes significantly to the social problems surrounding recreat...

UNLABELLED (11)C-LY2795050 is a novel κ-selective antagonist PET tracer. The in vitro binding affinities (Ki) of LY2795050 at the κ-opioid (KOR) and μ-opioid (MOR) receptors are 0.72 and 25.8 nM, respectively. Thus, the in vitro KOR/MOR binding selectivity is about 36:1. Our goal in this study was to determine the in vivo selectivity of this new KOR antagonist tracer in the monkey. METHODS To...

INTRODUCTION Avascular necrosis (AVN) is a serious complication of treatment for developmental dysplasia of the hip. There is ongoing controversy regarding AVN and its influence on hip development following medial open reduction (MOR). PURPOSE The aim of our study was to (1) determine the long-term prevalence of AVN following MOR, (2) evaluate hip development after MOR, and (3) identify predi...

11C-LY2795050 is a novel k-selective antagonist PET tracer. The in vitro binding affinities (Ki) of LY2795050 at the k-opioid (KOR) and m-opioid (MOR) receptors are 0.72 and 25.8 nM, respectively. Thus, the in vitro KOR/MOR binding selectivity is about 36:1. Our goal in this study was to determine the in vivo selectivity of this new KOR antagonist tracer in the monkey. Methods: To estimate the ...

Long-term opioid agonist treatment results in adenylyl cyclase superactivation. A recent "RAVE" theory implicates a direct correlation between the ability of agonist to induce receptor internalization and the magnitude of adenylyl cyclase superactivation. We decided to test such a theory by examining the adenylyl cyclase superactivation after long-term activation of mu-opioid receptor (MOR) in ...

Opioid receptors are expressed in the vestibular endorgans (afferent neurons and hair cells) and are activated by the efferent system, which modulates the discharge of action potentials in vestibular afferent neurons (VANs). In mammals, VANs mainly express the μ opioid-receptor, but the function of this receptors activation and the cellular mechanisms by which they exert their actions in these ...

Stress differentially affects hippocampal-dependent learning relevant to addiction and morphology in male and female rats. Mu opioid receptors (MORs), which are located in parvalbumin (PARV)-containing GABAergic interneurons and are trafficked in response to changes in the hormonal environment, play a critical role in promoting principal cell excitability and long-term potentiation. Here, we co...