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https://www.readbyqxmd.com/read/28220483/pharmacokinetics-and-pharmacodynamics-of-metamizol-in-co-administration-with-morphine-under-acute-and-chronic-treatments-in-arthritic-rats
#1
Patricia Esmeralda Carrillo-Calzadilla, Francisco Javier López-Muñoz, Luis Alfonso Moreno-Rocha, José Raúl Medina-López, Alma Rosa Cortés-Arroyo, Adriana Miriam Domínguez-Ramírez
OBJECTIVE: To investigate the relationship between metamizol pharmacokinetics and the antinociceptive effect produced after subcutaneous administration of metamizol (177.8 mg/kg) alone or in combination with morphine (3.2 mg/kg), under acute and chronic treatments. METHODS: Antinociception was assessed using the pain-induced functional impairment model in rat (PIFIR). Serial blood samples were collected from the same animals to study the pharmacokinetics of metamizol...
February 21, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28219988/sex-differences-in-microglia-activity-within-the-periaqueductal-gray-of-the-rat-a-potential-mechanism-driving-the-dimorphic-effects-of-morphine
#2
H H Doyle, L N Eidson, D M Sinkiewicz, A Z Murphy
Although morphine remains the primary drug prescribed for alleviation of severe or persistent pain, both preclinical and clinical studies have shown that females require 2-3 times more morphine than males to produce comparable levels of analgesia. In addition to binding to the neuronal μ opioid receptor (MOR), morphine binds to the innate immune receptor toll-like receptor 4 (TLR4) localized primarily on microglia. Morphine action at TLR4 initiates a neuroinflammatory response that directly opposes the analgesic effects of morphine...
February 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28219639/leishmania-l-amazonensis-induces-hyperalgesia-in-balb-c-mice-contribution-of-endogenous-spinal-cord-tnf%C3%AE-and-nf%C3%AE%C2%BAb-activation
#3
Sergio M Borghi, Victor Fattori, Kenji W Ruiz-Miyazawa, Milena M Miranda-Sapla, Rúbia Casagrande, Phileno Pinge-Filho, Wander R Pavanelli, Waldiceu A Verri
: Cutaneous leishmaniasis (CL) is the most common form of the leishmaniasis in humans. Ulcerative painless skin lesions are predominant clinical features of CL. Wider data indicate pain accompanies human leishmaniasis, out with areas of painless ulcerative lesions per se. In rodents, Leishmania (L.) major infection induces nociceptive behaviors that correlate with peripheral cytokine levels. However, the role of the spinal cord in pain processing after Leishmania infection has not been investigated...
February 17, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28219590/continuous-paravertebral-infusions-as-an-effective-adjunct-for-postoperative-pain-management-in-living-liver-donors-a-retrospective-observational-study
#4
K Mistry, J Hutchins, J Leiting, K Mangalick, T Pruett, S Chinnakotla
We analyzed the effectiveness of paravertebral-block for immediate postoperative pain control in living liver donors. Specifically, we sought to determine whether or not the addition of paravertebral catheters with continuous ropivacaine infusion would decrease postoperative opioid use and reduce the incidence of adverse effects and complications. We reviewed the records of 26 patients who underwent right-lobe living donor hepatectomy (RLDH): 16 with and 10 without such catheters. The primary outcome was opioid use on postoperative day (POD) 1 through 3...
March 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28217054/role-of-intercostal-nerve-block-in-reducing-postoperative-pain-following-video-assisted-thoracoscopy-a-randomized-controlled-trial
#5
Zulfiqar Ahmed, Khalid Samad, Hameed Ullah
BACKGROUND: The main advantages of video assisted thoracoscopic surgery (VATS) include less post-operative pain, rapid recovery, less postoperative complications, shorter hospital stay and early discharge. Although pain intensity is less as compared to conventional thoracotomy but still patients experience upto moderate pain postoperatively. The objective of this study was to assess the efficacy and morphine sparing effect of intercostal nerve block in alleviating immediate post-operative pain in patients undergoing VATS...
January 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28215164/innovative-opioid-peptides-and-biased-agonism-novel-avenues-for-more-effective-and-safer-analgesics-to-treat-chronic-pain
#6
Andrea Bedini, Santi Mario Spampinato
Chronic pain is a clinically relevant and yet unsolved conditions that is poorly treated with the currently available drugs, thus highlighting the urgent need of innovative analgesics. Although opiates are not very effective in the treatment of inflammatory and neuropathic pain, developing novel opioid receptor peptide agonists, as well as modulating the opioid receptor-mediated responses in a ligand-specific fashion, may represent an innovative and promising strategy to identify more efficacious and safer antalgic drugs...
February 15, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28214220/comparison-of-the-hanging-drop-technique-and-running-drip-method-for-identifying-the-epidural-space-in-dogs
#7
Fernando Martinez-Taboada, José I Redondo
OBJECTIVE: To compare the running-drip and hanging-drop techniques for locating the epidural space in dogs. STUDY DESIGN: Prospective, randomized, clinical trial. ANIMALS: Forty-five healthy dogs requiring epidural anaesthesia. METHODS: Dogs were randomized into four groups and administered epidural anaesthesia in sternal (S) or lateral (L) recumbency. All blocks were performed by the same person using Tuohy needles with either a fluid-prefilled hub (HDo) or connected to a drip set attached to a fluid bag elevated 60 cm (RDi)...
January 8, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28214218/implication-of-downregulation-and-prospective-pathway-signaling-of-microrna-375-in-lung-squamous-cell-carcinoma
#8
Wen-Jie Chen, Ting-Qing Gan, Hui Qin, Su-Ning Huang, Li-Hua Yang, Ye-Ying Fang, Zu-Yun Li, Lin-Jiang Pan, Gang Chen
BACKGROUND: Lung cancer is one of the most typical cancers in the world. Altered expression profiles of microRNA-375(miR-375) are linked to many diseases including lung cancer. However, the relationship between miR-375 and lung squamous cell carcinoma (LUSC) is controversial. METHODS: We first evaluated the 23 LUSCs and the paired normal lung tissues by qRT-PCR. Then we analyzed the LUSC samples with miR-375 expression based on The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO)...
January 22, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28213891/opioids-and-the-immune-system-friend-or-foe
#9
REVIEW
Lisanne Mirja Plein, Heike L Rittner
Systemically administered opioids are among the most powerful analgesics for treating severe pain. Several negative side-effects (respiratory depression, addiction, nausea, confusion) and the risk of opioid-induced hyperalgesia accompany opioid administration. One other side effect is the potential of opioids to suppress the immune response and thereby to increase the vulnerability for infections. Several studies have investigated the link between opioids and immunosuppression in vitro, in vivo as well as in patients with divergent results: Exogenous opioids such as morphine and fentanyl can impair macrophage and natural killer cell as well as T cell function and weaken the gut barrier in vitro and in animal studies...
February 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28212204/1-2-4-dibromophenyl-3-6-6-trimethyl-1-5-6-7-tetrahydro-4h-indazol-4-one-a-novel-opioid-receptor-agonist-with-less-accompanying-gastrointestinal-dysfunction-than-morphine
#10
Po-Kuan Chao, Shau-Hua Ueng, Li-Chin Ou, Teng-Kuang Yeh, Wan-Ting Chang, Hsiao-Fu Chang, Shu-Chun Chen, Pao-Luh Tao, Ping-Yee Law, Horace H Loh, Ming-Fu Cheng, Jian-Ying Chuang, Chiung-Tong Chen, Chuan Shih, Shiu-Hwa Yeh
BACKGROUND: The authors investigated the pharmacology and signaling pathways of the opioid receptors modulated by compound 1, 1-(2,4-dibromophenyl)-3,6,6-trimethyl-1,5,6,7-tetrahydro-4H-indazol-4-one. METHODS: In vitro studies of compound 1 were assessed by using a radioligand-binding assay (n = 3), a cyclic adenosine monophosphate assay (n = 3), a β-arrestin assay (n = 3), an internalization assay (n = 3), and an immunohistochemistry (n = 8). In vivo studies of compound 1 were characterized using a tail-flick test (n = 5 to 6), tail-clip test (n = 7), von Frey hair test (n = 5), and charcoal meal test (n = 5)...
February 17, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28212183/cxcl12-cxcr4-signaling-contributes-to-the-pathogenesis-of-opioid-tolerance-a-translational-study
#11
Chih-Peng Lin, Kai-Hsiang Kang, Huang-Ju Tu, Ming-Yueh Wu, Tzu-Hung Lin, Houng-Chi Liou, Wei-Zen Sun, Wen-Mei Fu
BACKGROUND: Long-term opioid therapy for chronic pain may lead to analgesic tolerance, especially when administered intrathecally, thus preventing adequate pain relief. Discovering drug targets to treat opioid tolerance using a mechanism-based approach targeting opioid-induced neuroinflammation provides new therapeutic opportunities. In this study, we provide translational evidence that CXCL12/CXCR4 signaling contributes to the pathogenesis of opioid tolerance. METHODS: The CXCL12 levels in the cerebrospinal fluid of opioid-tolerant patients were compared with those of opioid-naive subjects...
March 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28211545/the-effect-of-gut-microbiome-on-tolerance-to-morphine-mediated-antinociception-in-mice
#12
Minho Kang, Ryan A Mischel, Sukhada Bhave, Essie Komla, Alvin Cho, Charity Huang, William L Dewey, Hamid I Akbarali
There is growing appreciation for the importance of gastrointestinal microbiota in many physiological and pathophysiological processes. While morphine and other narcotics are the most widely prescribed therapy for moderate to severe pain clinically, they have been noted to alter microbial composition and promote bacterial translocation to other tissues. Here we examined the pharmacodynamic properties of chronic morphine in mice following bacterial depletion with oral gavage of an antibiotic cocktail (ABX). ABX significantly reduced gut bacteria and prevented chronic morphine induced increases in gut permeability, colonic mucosal destruction, and colonic IL-1β expression...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28210646/pain-assessment-after-anterior-cruciate-ligament-reconstruction-bone-patellar-tendon-bone-versus-hamstring-tendon-autograft
#13
Kelechi R Okoroha, Robert A Keller, Edward K Jung, Lafi Khalil, Nathan Marshall, Patricia A Kolowich, Vasilios Moutzouros
BACKGROUND: Anterior cruciate ligament (ACL) reconstruction is a common outpatient procedure that is accompanied by significant postoperative pain. PURPOSE: To determine differences in acute pain levels between patients undergoing ACL reconstruction with bone-patellar tendon-bone (BTB) versus hamstring tendon (HS) autograft. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: A total of 70 patients who underwent primary ACL reconstruction using either BTB or HS autografts consented to participate...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28207529/comparison-of-the-pro-postoperative-analgesia-of-intraoperative-dexmedetomidine-with-and-without-loading-dose-following-general-anesthesia-a-prospective-randomized-controlled-clinical-trial
#14
Wei Fan, Haikou Yang, Yong Sun, Jun Zhang, Guangming Li, Ying Zheng, Yi Liu
Intraoperative dexemdetomidine (DEX) with or without loading dose is well-established to improve postoperative pain control in patient-controlled analgesia (PCA). This study was designed to compare the pro-analgesia effect between the 2 in patients received general anesthesia.Seventy patients shceduced abdominal surgery under general anesthesia were randomly assigned into 3 groups which were maintained using propofol/remifentanil/Ringer solution (PRR), propofol/remifentanil/dexmedetomidine with (PRDw) or without (PRDo) a loading dose of dexmedetomidine before induction...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28206989/il-4-mediated-by-hsv-vector-suppresses-morphine-withdrawal-response-through-decreasing-tnf%C3%AE-nr2b-and-pc-ebp%C3%AE-in-the-periaqueductal-gray-in-rats
#15
H Yi, T Iida, S Liu, D Ikegami, Q Liu, A Iida, D A Lubarsky, S Hao
Chronic opiates induce the development of physical dependence. Opioid physical dependence characterized by withdrawal symptoms, may have very long-lasting effects on the motivation for reward, including the incubation of cue-induced drug-seeking behavior. Elucidation of the mechanisms involved in physical dependence is crucial to developing more effective treatment strategies for opioid dependence. Chronic morphine induces production of proinflammatory cytokines in regional-specific sites of the brain. Interleukin-4 (IL-4) is a prototypical anti-inflammatory cytokine that globally suppresses proinflammatory cytokines...
February 16, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28205234/stability-studies-of-potent-opioid-analgesic-morphine-6-o-sulfate-in-various-buffers-and-biological-matrices-by-hplc-dad-analysis
#16
Jai Shankar K Yadlapalli, Zaineb A F Albayati, Narasimha R Penthala, Howard P Hendrickson, Peter A Crooks
The 6-O-sulfate ester of morphine, (M6S), has previously been shown to be an analgesic with greater potency and fewer side effects than to morphine. However, being a sulfate ester derivative of morphine, the question exists as to whether this compound is stable in biological fluids and tissues with regard to pH- and esterase-mediated degradation. To date, no studies have focused on the stability profile of M6S across the physiologically relevant pH range of 1.2 - 7.4. In addition, the stability of M6S is not known in rat plasma and rat brain homogenate, or in simulated rat gastric and intestinal fluids...
February 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28204722/managing-postoperative-analgesic-failure-tramadol-versus-morphine-for-refractory-pain-in-the-post-operative-recovery-unit
#17
Kelly Byrne, Aoife Nolan, John Barnard, Megan Tozer, David Harris, Jamie Sleigh
No abstract text is available yet for this article.
February 1, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28203684/crushed-sublingual-versus-oral-ticagrelor-administration-strategies-in-patients-with-unstable-angina-a-pharmacokinetic-pharmacodynamic-study
#18
Piotr Niezgoda, Joanna Sikora, Malwina Barańska, Adam Sikora, Katarzyna Buszko, Emilia Siemińska, Michał Piotr Marszałł, Jolanta M Siller-Matula, Bernd Jilma, Dimitrios Alexopoulos, Tomasz Fabiszak, Jacek Kubica
Oral administration of crushed ticagrelor tablets turned out to be an efficacious method that improves its pharmacokinetics and pharmacodynamics. This strategy, however, is unlikely to eliminate the drug-drug interaction in patients receiving intravenous morphine, as the impairment of the P2Y12 inhibitor absorption related to decreased propulsive motility of the gastro-intestinal tract is the most likely mechanism of interaction. Thus, we designed a pharmacokinetic and pharmacodynamic study setting the feasibility of platelet inhibition with a loading dose of ticagrelor given as crushed tablets sublingually compared with two other ticagrelor loading dose administration strategies: integral tablet given orally and crushed tablet given orally in patients with unstable angina...
February 16, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28203561/comparative-prospective-case-control-study-of-open-versus-laparoscopic-pyeloplasty-in-children-with-ureteropelvic-junction-obstruction-long-term-results
#19
Lisandro A Piaggio, Juan P Corbetta, Santiago Weller, Ricardo Augusto Dingevan, Víctor Duran, Javier Ruiz, Juan C Lopez
INTRODUCTION: We compare open pyeloplasty (OP) versus laparoscopic pyeloplasty (LP) in children in a multicenter, prospective, case-control study. MATERIALS AND METHODS: From May 2007 to March 2009, a program was established at Hospital Garrahan, the reference center, to perform LP with a mentoring surgeon that would attend the institution once a month. Every new case of ureteropelvic junction obstruction (UPJO) diagnosed in the reference institution was offered to participate in the study...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28199917/desomorphine-krokodil-an-overview-of-its-chemistry-pharmacology-metabolism-toxicology-and-analysis
#20
REVIEW
Diego Hernando Ângulo Florez, Ana Maria Dos Santos Moreira, Pedro Rafael da Silva, Ricardo Brandão, Marcella Matos Cordeiro Borges, Fernando José Malagueño de Santana, Keyller Bastos Borges
BACKGROUND: "Krokodil" or "Crocodile" is an illegal homemade desomorphine drug obtained from chemical reactions of commercial codeine drugs with several other powerful and highly toxic chemical agents increasing its addiction and hallucinogenic effects when compared with other morphine analogues. METHODS: This paper summarizes a complete review about an old drug called desomorphine (Krokodil), presenting its chemistry, pharmacology, metabolism, toxicology and analysis...
January 31, 2017: Drug and Alcohol Dependence
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