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Pain mechanisms

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https://www.readbyqxmd.com/read/27935995/into-the-bowels-of-depression-unravelling-medical-symptoms-associated-with-depression-by-applying-machine-learning-techniques-to-a-community-based-population-sample
#1
Joanna F Dipnall, Julie A Pasco, Michael Berk, Lana J Williams, Seetal Dodd, Felice N Jacka, Denny Meyer
BACKGROUND: Depression is commonly comorbid with many other somatic diseases and symptoms. Identification of individuals in clusters with comorbid symptoms may reveal new pathophysiological mechanisms and treatment targets. The aim of this research was to combine machine-learning (ML) algorithms with traditional regression techniques by utilising self-reported medical symptoms to identify and describe clusters of individuals with increased rates of depression from a large cross-sectional community based population epidemiological study...
2016: PloS One
https://www.readbyqxmd.com/read/27935777/acupuncture-and-chronic-pain-management
#2
Ladan Eshkevari
According to National Institute of Health Pathways to Prevention Workshop (2014), chronic pain affects an estimated 100 million Americans, with approximately 25 million people experiencing moderate to severe chronic pain, which negatively impacts their ability to function leading to a diminished quality of life. Pain is the primary reason Americans are on disability, which adds to the economic and social burden of suffering for the nation. Chronic pain costs are estimated to be between 560 and 630 billion per year...
January 2017: Annual Review of Nursing Research
https://www.readbyqxmd.com/read/27935565/traumatic-amputations-in-children-and-adolescents-a-demographic-study-from-a-tertiary-care-center-in-northern-india
#3
Javed Ahmad, Anil Kumar Gupta, V P Sharma, Dileep Kumar, Ganesh Yadav, Sanjai Singh
PURPOSE: To determine the demographic pattern, level, mechanism of traumatic amputation in children and adolescent age group and to compare findings with other studies. METHODS: Patients aged less than 18 years with traumatic amputation attending Department of Physical Medicine and Rehabilitation, King George's Medical University, Lucknow, India between July 2013 and January 2016 were enrolled and their demographic characteristics were analyzed. RESULTS: Fifty-three patients were included aged less than 18 years when injured...
November 30, 2016: Journal of Pediatric Rehabilitation Medicine
https://www.readbyqxmd.com/read/27935479/structural-basis-for-subtype-specific-inhibition-of-the-p2x7-receptor
#4
Akira Karasawa, Toshimitsu Kawate
The P2X7 receptor is a non-selective cation channel activated by extracellular adenosine triphosphate (ATP). Chronic activation of P2X7 underlies many health problems such as pathologic pain, yet we lack effective antagonists due to poorly understood mechanisms of inhibition. Here we present crystal structures of a mammalian P2X7 receptor complexed with five structurally-unrelated antagonists. Unexpectedly, these drugs all bind to an allosteric site distinct from the ATP-binding pocket in a groove formed between two neighboring subunits...
December 9, 2016: ELife
https://www.readbyqxmd.com/read/27935457/impact-of-a-hypnotically-based-intervention-on-pain-and-fear-in-women-undergoing-labor
#5
Véronique Waisblat, Bryan Langholz, Franck J Bernard, Monique Arnould, Aurélien Benassi, François Ginsbourger, Nicolas Guillou, Karine Hamelin, Philippe Houssel, Pierre Hugot, Sylvie Martel-Jacob, Moustapha Moufouki, Hervé Musellec, Said Nid Mansour, Daniel Ogagna, Xavier Paqueron, Sihem Zerguine, Patrice Cavagna, Sébastien Bloc, Mark P Jensen, Gilles Dhonneur
The purpose of this study was to evaluate the effects of a hypnotically-based intervention for pain and fear in women undergoing labor who are about to receive an epidural catheter. A group of 155 women received interventions that included either (a) patient rocking, gentle touching, and hypnotic communication or (b) patient rocking, gentle touching, and standard communication. The authors found that the hypnotic communication intervention was more effective than the standard communication intervention for reducing both pain intensity and fear...
January 2017: International Journal of Clinical and Experimental Hypnosis
https://www.readbyqxmd.com/read/27935216/modulation-of-diet-induced-mechanical-allodynia-by-metabolic-parameters-and-inflammation
#6
Michael A Cooper, Janelle M Ryals, Pau Yen Wu, Kellen D Wright, Katherine R Walter, Douglas E Wright
Dietary-associated diseases have increased tremendously in our current population, yet key molecular changes associated with high-fat diets that cause clinical prediabetes, obesity, hyperglycemia, and peripheral neuropathy remain unclear. This study examines molecular and metabolic aspects altered by voluntary exercise and a high-fat diet in the mouse dorsal root ganglion. Mice were examined for changes in mRNA and proteins encoding anti-inflammatory mediators, metabolic-associated molecules, and pain associated ion channels...
December 9, 2016: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/27933591/charcoal-hemoperfusion-in-the-treatment-of-medically-refractory-pruritus-in-cholestatic-liver-disease
#7
Wonngarm Kittanamongkolchai, Ziad M El-Zoghby, J Eileen Hay, Russell H Wiesner, Patrick S Kamath, Nicholas F LaRusso, Kymberly D Watt, Carl H Cramer, Nelson Leung
BACKGROUND: Pruritus is a distressing symptom in a considerable proportion of cholestatic patients and a few of them do not respond to conventional treatment. Charcoal hemoperfusion (CH) is an extracorporeal technique that is effective in eliminating protein-bound substances which may have accumulated during cholestasis. Several case reports have shown significant reduction of bilirubin in mechanical jaundice and neonatal hemolytic jaundice. However, the published data of CH for the treatment of refractory pruritus in cholestatic patients are scarce...
December 8, 2016: Hepatology International
https://www.readbyqxmd.com/read/27933392/leishmania-infection-painful-or-painless
#8
REVIEW
Sergio M Borghi, Victor Fattori, Ivete Conchon-Costa, Phileno Pinge-Filho, Wander R Pavanelli, Waldiceu A Verri
The complex life cycle and immunopathological features underpinning the interaction of Leishmania parasites and their mammalian hosts poses frequent poorly explored and inconclusively resolved questions. The altered nociceptive signals over the course of leishmaniasis remain an intriguing issue for nociceptive and parasitology researchers. Experimental investigations have utilized behavioral, morphological, and neuro-immune approaches in the study of experimental cutaneous leishmaniasis (CL). The data generated indicates new venues for the study of the pathological characteristics of nociceptive processing in this parasitic disease...
December 9, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27933174/a-case-of-hepatitis-c-associated-osteosclerosis-accelerated-bone-turnover-controlled-by-pulse-steroid-therapy
#9
Nobuhiro Miyamura, Shuhei Nishida, Mina Itasaka, Hirofumi Matsuda, Takeshi Ohtou, Yasuhiro Yamaguchi, Daisuke Inaba, Sadahiro Tamiya, Tetsuo Nakano
: Hepatitis C-associated osteosclerosis (HCAO), a very rare disorder in which an extremely rapid bone turnover occurs and results in osteosclerosis, was acknowledged in 1990s as a new clinical entity with the unique bone disorder and definite link to chronic type C hepatitis, although the pathogenesis still remains unknown. Affected patients suffer from excruciating deep bone pains. We report the 19th case of HCAO with diagnosis confirmed by bone biopsy, and treated initially with a bisphosphonate, next with corticosteroids and finally with direct acting antivirals (DAA: sofosbuvir and ribavirin) for HCV infection...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27932896/involvement-of-spinal-glutamate-transporter-1-in-the-development-of-mechanical-allodynia-and-hyperalgesia-associated-with-type-2-diabetes
#10
Jinshan Shi, Ke Jiang, Zhaoduan Li
Little is known about the effects of the development of type 2 diabetes on glutamate homeostasis in the spinal cord. Therefore, we quantified the extracellular levels of glutamate in the spinal cord of Zucker diabetic fatty (ZDF) rats using in vivo microdialysis. In addition, protein levels of glutamate transporter-1 (GLT-1) in the spinal cord of ZDF rats were measured using Western blot. Finally, the effects of repeated intrathecal injections of ceftriaxone, which was previously shown to enhance GLT-1 expression, on the development of mechanical allodynia and hyperalgesia as well as on basal extracellular level of glutamate and the expression of GLT-1 in the spinal cord of ZDF rats were evaluated...
2016: Journal of Pain Research
https://www.readbyqxmd.com/read/27932679/tendon-collagen-synthesis-declines-with-immobilization-in-elderly-humans-no-effect-of-anti-inflammatory-medication
#11
Kasper Dideriksen, Anders Ploug Boesen, Søren Reitelseder, Christian Couppe, Rene Brüggebusch Svensson, Peter Schjerling, S Peter Magnusson, Lars Holm, Michael Kjaer
BACKGROUND: Non-steroidal anti-inflammatory drugs (NSAID) are used as pain killers during periods of unloading caused by traumatic occurrences or diseases. However, it is unknown how the tendon protein turnover and mechanical properties responds to unloading and subsequent loading in elderly humans, and especially whether NSAIDs affect tendon adaptation during such periods. Thus, we studied the influence of NSAID upon the human patellar tendon protein synthesis and mechanical properties during immobilization and subsequent rehabilitating resistance training...
December 8, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27932062/experiencing-neonatal-maternal-separation-increased-pain-sensitivity-in-adult-male-mice-involvement-of-oxytocinergic-system
#12
Hossein Amini-Khoei, Shayan Amiri, Ali Mohammadi-Asl, Sakineh Alijanpour, Simin Poursaman, Arya Haj-Mirzaian, Mojgan Rastegar, Azam Mesdaghinia, Hamid Reza Banafshe, Ehsanollah Sadeghi, Elika Samiei, Shahram Ejtemaie Mehr, Ahmad Reza Dehpour
Early-life stress adversely affects the development of the brain, and alters a variety of behaviors such as pain in later life. In present study, we investigated how early-life stress (maternal separation or MS) can affect the nociceptive response later in life. We particularly focused on the role of oxytocin (OT) in regulating nociception in previously exposed (MS during early postnatal development) mice that were subjected to acute stress (restraint stress or RS). Further, we evaluated whether such modulation of pain sensation in MS mice are regulated by shared mechanisms of the OTergic and opioidergic systems...
November 30, 2016: Neuropeptides
https://www.readbyqxmd.com/read/27931967/imaging-in-mechanical-back-pain-anything-new
#13
REVIEW
Bjarke Brandt Hansen, Philip Hansen, John A Carrino, Gilles Fournier, Zoreh Rasti, Mikael Boesen
Low back pain is common and relates to a variety of overlapping pathologies. Within the last few decades, almost every medical imaging modality has been applied in the evaluation of low back pain. Imaging of the spine has a high priority in the assessment of patients with low back pain, who seem to expect such procedures to be undertaken. However, the majority of conventional imaging techniques do not have adequate precision to identify the primary source of pain. Not only can this be frustrating to both clinicians and patients, but importantly, inadequate correlation between imaging findings and symptoms hampers the ability of clinicians to devise a specific treatment plan for the patient...
August 2016: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/27931928/the-norberg-angle-is-not-an-accurate-predictor-of-canine-hip-conformation-based-on-the-distraction-index-and-the-dorsolateral-subluxation-score
#14
Ana R Gaspar, Galina Hayes, Catarina Ginja, Mário M Ginja, Rory J Todhunter
Canine hip dysplasia (CHD) is a common complex trait characterized by abnormal hip joint development. Hip joint laxity, an early characteristic of CHD, results in degeneration of the joint due to mechanical trauma, which is a clinical problem mostly in medium to large breed dogs. Clinical signs include pain, decreased activity and lameness. A retrospective, multi-center, cross sectional study of 437 dogs was performed to determine if a Norberg angle (NA) ≥105° accurately predicts a non-dysplastic hip based on a distraction index (DI) cut-off of ≤0...
December 1, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/27931108/caustic-esophageal-injury-by-impaction-of-cell-batteries
#15
Francisco José García Fernández, Rafael León Montañés, Juan Manuel Bozada Garcia
The ingestion of cell batteries can cause serious complications (fistula, perforation or stenosis) at the esophageal level. The damage starts soon after ingestion (approximately 2 hours) and is directly related to the amount of time the battery is lodged in said location, the amount of electrical charge remaining in the battery, and the size of the battery itself. Injury is produced by the combination of electrochemical and chemical mechanisms and pressure necrosis. The ingestion of multiple cells and a size > = 20 mm are related with more severe and clinically significant outcomes...
December 2016: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/27930572/acute-onset-chronic-inflammatory-demyelinating-polyneuropathy-in-hantavirus-and-hepatitis-b-virus-coinfection-a-case-report
#16
Jong Youb Lim, Young-Ho Lim, Eun-Hi Choi
INTRODUCTION: Chronic inflammatory demyelinating polyneuropathy (CIDP) is an acquired autoimmune disorder with progressive weakness. Acute-onset CIDP resembles Guillain-Barre syndrome (GBS), a rapidly progressive disorder, and follows a chronic course. To our knowledge, no case of acute-onset CIDP in hantavirus and hepatitis B virus (HBV) coinfection has been reported previously. CLINICAL FINDINGS: We report a case of acute-onset CIDP that was initially diagnosed as GBS...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27930520/is-retrograde-drilling-really-useful-for-osteochondral-lesion-of-talus-with-subchondral-cyst-a-case-report
#17
Seong-Yup Jeong, Jong-Kil Kim, Kwang-Bok Lee
RATIONALE: Retrograde drilling is a well accepted procedure for osteochondral lesion of the talus and subchondral cyst with intact overlying cartilage. It has good results in most reports. Compared to anterograde drilling, retrograde drilling can protect the integrity of the articular cartilage. The purpose of this study was to evaluate the suitability of using retrograde drilling for osteochondral lesion with subchondral cyst and discuss the mechanism involved in the development of subchondral cyst...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27930451/postexercise-hypotension-is-volume-dependent-in-hypertensives-autonomic-and-forearm-blood-responses
#18
Aline de Freitas Brito, Maria do Socorro Brasileiro Santos, Caio Victor Coutinho de Oliveira, Amilton da Cruz Santos
The purpose of this study was to investigate the short-term effect of kettlebell swings (KBSs) on lumbopelvic pressure pain thresholds (PPTs) in healthy adults. Sixty participants (male=23, female=37, mean age=25.12 years ±2.86, height=170.73 cm ± 9.2, mass=70.49 kg ± 13.32) were randomized into one of two groups. The experimental group performed a warm-up followed by eight consecutive 20-second rounds of KBS with 10-second rest periods. The control group performed the warm-up alone. An evaluator blinded to group assignment, assessed PPTs immediately before and after the intervention using a handheld pressure algometer...
November 19, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27930448/the-short-term-effect-of-kettlebell-swings-on-lumbopelvic-pressure-pain-thresholds-a-randomized-controlled-trial
#19
Brandon M Keilman, William J Hanney, Morey J Kolber, Patrick S Pabian, Paul A Salamh, Carey E Rothschild, Xinliang Liu
The purpose of this study was to investigate the short-term effect of kettlebell swings (KBSs) on lumbopelvic pressure pain thresholds (PPTs) in healthy adults. Sixty participants (male=23, female=37, mean age=25.12 years ±2.86, height=170.73 cm ± 9.2, mass=70.49 kg ± 13.32) were randomized into one of two groups. The experimental group performed a warm-up followed by eight consecutive 20-second rounds of KBS with 10-second rest periods. The control group performed the warm-up alone. An evaluator blinded to group assignment, assessed PPTs immediately before and after the intervention using a handheld pressure algometer...
November 19, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27930392/pain-catastrophizing-is-not-associated-with-spinal-nociceptive-processing-in-people-with-chronic-widespread-pain
#20
David A Rice, Rosalind S Parker, Gwyn N Lewis, Michal T Kluger, Peter J McNair
OBJECTIVES: Pain catastrophizing has been associated with higher pain intensity, increased risk of developing chronic pain and poorer outcomes after pain treatments. Despite this, the mechanisms by which pain catastrophizing influences pain remain poorly understood. It has been hypothesised that pain catastrophizing may impair descending inhibition of spinal level nociception. The aims of this study were to compare spinal nociceptive processing in people with chronic widespread pain and pain free controls and examine potential relationships between measures of pain catastrophizing and spinal nociception...
December 7, 2016: Clinical Journal of Pain
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