Persistent Nociception Facilitates the Extinction of Morphine-Induced Conditioned Place Preference.

Persistent Nociception Facilitates the Extinction of Morphine-Induced Conditioned Place Preference. Anesth Analg. 2019 Sep;129(3):890-895 Authors: You Z, Ding W, Doheny JT, Yang J, Yang L, Lim G, Miao J, Chen L, Shen S, Mao J Abstract BACKGROUND: As opioid abuse and addiction have developed into a major national health crisis, prescription of opioids for pain management has become more controversial. However, opioids do help some patients by providing pain relief and improving the quality of life. To better understand the addictive properties of opioids under chronic pain conditions, we used a conditioned place preference (CPP) paradigm to examine the rewarding properties of morphine in rats with persistent nociception. METHODS: Spared nerve injury (SNI) model was used to induce persistent nociception in rats. Nociceptive behavior was assessed by von Frey test. CPP test was used to examine the rewarding properties of morphine. RESULTS: Our findings are as follows: (1) SNI rats did not show a difference compared with sham rats in magnitude of morphine-induced CPP 1 day after last morphine injection (2-way analysis of variance; for SNI versus sham, F[1,42] = 0.014, P = .91; and 95% confidence intervals for difference of means, -5.9 [-58 to 46], 0.76 [-51 to 53], and 0.90 [-51 to 53] for 2.5, 5, and 10 mg/kg, respectively); (2) increasing morphine dosage (2.5, 5, and 10 mg/kg) did not further increase the magnitude of CPP in both sham and SNI rats...
Source: Anesthesia and Analgesia - Category: Anesthesiology Authors: Tags: Anesth Analg Source Type: research

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Jeffrey A. SingerThe Drug Enforcement Administration, having virtually eliminated the diversion of prescription pain relievers into the underground market for nonmedical users, appears to be setting its sights on regulating the medical management of pain, a mission not suited for law enforcement. Acting under the authority of the Substance Use-Disorder Prevention that Promotes Opioid Recovery and Treatment for Patients and Communities Act (SUPPORT Act), the DEA  announced a proposal to reduce, once again, the national production quotas for fentanyl, morphine, hydromorphone (Dilaudid), oxycodone, and oxymorphone, ...
Source: Cato-at-liberty - Category: American Health Authors: Source Type: blogs
AbstractGlobally, chronic pain is a major therapeutic challenge and affects more than 15% of the population. As patients with painful terminal diseases may face unbearable pain, there is a need for more potent analgesics. Although opioid-based therapeutic agents received attention to manage severe pain, their adverse drug effects and mortality rate associated with opioids overdose are the major concerns. Evidences from clinical trials showed therapeutic benefits of cannabis, especially delta-9-tetrahydrocannabinol and cannabinoids reduced neuropathic pain intensity in various conditions. Also, there are reports on using co...
Source: Journal of Anesthesia - Category: Anesthesiology Source Type: research
Abstract Ketamine's clinical use began in the 1970s. Physicians benefited from its safety and ability to induce short-term anesthesia and analgesia. The psychodysleptic effects caused by the drug called its further clinical use into question. Despite these unpleasant effects, ketamine is still applied in veterinary medicine, field medicine, and specialist anesthesia. Recent intensive research brought into light new possible applications of this drug. It began to be used in acute, chronic and cancer pain management. Most interesting reports come from research on the antidepressive and antisuicidal properties of ket...
Source: European Journal of Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Eur J Pharmacol Source Type: research
CONCLUSIONS: Our data suggest that a combination therapy using low-dose MPH and MOR may produce a MOR-sparing effect in chronic pain management. PMID: 31206430 [PubMed - as supplied by publisher]
Source: Anesthesia and Analgesia - Category: Anesthesiology Authors: Tags: Anesth Analg Source Type: research
You're reading Options to Opioids: How to Manage Chronic Pain Without Prescribing Pain-Killers, originally posted on Pick the Brain | Motivation and Self Improvement. If you're enjoying this, please visit our site for more inspirational articles. While there is considerable debate as to how much blame doctors should be assigned for the ongoing opioid crisis, there is little doubt they can do something to curtail it -- that instead of prescribing drugs that have been found to be highly addictive they can resort to alternate forms of pain management. Doctors’ prescription of powerful painkillers like OxyContin is frequ...
Source: PickTheBrain | Motivation and Self Improvement - Category: Consumer Health News Authors: Tags: health and fitness addiction health and wellness opioids self improvement Source Type: blogs
In order to resolve well-known problems arising from the lack of a comprehensive, reliable, valid and utilitarian taxonomy of common chronic pain conditions, the Analgesic, Anesthetic, and Addiction Clinical Trial Translations Innovations Opportunities and Networks (ACTTION) public-private partnership has joined together with the U.S. Food and Drug Administration (FDA) and with the American Pain Society (APS) in order to develop an evidence-based taxonomy applicable to research and clinical management for diagnosing and classifying the most common chronic pain conditions.
Source: The Journal of Pain - Category: Materials Science Authors: Tags: Review Article Source Type: research
Conclusion and Future Directions G protein bias may either be affinity/potency-dominant or efficacy-dominant (Table 1). A potential concern is that, despite using the same cellular assays, variations in agonist potency were determined by different, or even the same labs, potentially due to differences in expression levels of the receptor and signaling proteins that occurred during cell passaging. For example the reported arrestin recruitment potency for U69,593 has been reported to be as low as 67.7 nM (Spetea et al., 2017) and as high as 410 nM (Dunn et al., 2018), similarly for U50,488 potency has ranged from 36 to 1000...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
In conclusion, our data show some of the brain modifications probably responsible for the behavioral phenotype associated with TBI and suggest the CBD as a pharmacological tool to improve neurological dysfunctions caused by the trauma. Introduction The phytocannabinoid cannabidiol (CBD), the major non-psychoactive constituent of Cannabis sativa, exhibits a broad spectrum of potential therapeutic properties, including neuroprotective effects in Central Nervous System (CNS) disorders (Fernández-Ruiz et al., 2013; De Gregorio et al., 2018; Schonhofen et al., 2018). Through a multitarget mechanism, CBD shows pot...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
In this study, we investigated the role of the small conductance calcium-activated potassium channels (SK channels) in NAc and mPFC after morphine withdrawal. Action potential (AP) firing of neurons in the NAc shell was enhanced via the downregulations of the SK channels after morphine withdrawal. Furthermore, the expression of SK2 and SK3 subunits in the NAc was significantly reduced after 3 weeks of morphine withdrawal, but was not altered in the dorsal striatum. In mPFC, the SK channel subunits were differentially expressed. To be specific, the expression of SK3 was upregulated, while the expression of SK2 was unchanged...
Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
Authors: Gabriel RA, Swisher MW, Sztain JF, Furnish TJ, Ilfeld BM, Said ET Abstract INTRODUCTION: There are various important implications associated with poorly controlled postoperative pain in the adult surgical patient - this includes cardiopulmonary complications, opioid-related side effects, unplanned hospital admissions, prolonged hospital stay, and the subsequent development of chronic pain or opioid addiction. With the ongoing national opioid crisis, it is imperative that perioperative providers implement pathways for surgical patients that reduce opioid requirements and pain-related complications. Areas co...
Source: Expert Opinion on Pharmacotherapy - Category: Drugs & Pharmacology Tags: Expert Opin Pharmacother Source Type: research
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