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https://www.readbyqxmd.com/read/28748217/mechanisms-and-applications-of-the-anti-inflammatory-effects-of-photobiomodulation
#1
Michael R Hamblin
Photobiomodulation (PBM) also known as low-level level laser therapy is the use of red and near-infrared light to stimulate healing, relieve pain, and reduce inflammation. The primary chromophores have been identified as cytochrome c oxidase in mitochondria, and calcium ion channels (possibly mediated by light absorption by opsins). Secondary effects of photon absorption include increases in ATP, a brief burst of reactive oxygen species, an increase in nitric oxide, and modulation of calcium levels. Tertiary effects include activation of a wide range of transcription factors leading to improved cell survival, increased proliferation and migration, and new protein synthesis...
2017: AIMS Biophysics
https://www.readbyqxmd.com/read/28735873/the-therapeutic-potential-of-purinergic-signalling
#2
REVIEW
Geoffrey Burnstock
This review is focused on the pathophysiology and therapeutic potential of purinergic signalling. A wide range of diseases are considered, including those of the central nervous system, skin, kidney, musculoskeletal, liver gut, lower urinary tract, cardiovascular, airways and reproductive systems, the special senses, infection, diabetes and obesity. Several purinergic drugs are already on the market, including P2Y12 receptor antagonists for stroke and thrombosis, P2Y2 receptor agonists for dry eye, A1 receptor agonists for supraventricular tachycardia...
July 20, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28735027/translation-of-an-injectable-triple-interpenetrating-network-hydrogel-for-intervertebral-disc-regeneration-in-a-goat-model
#3
Sarah E Gullbrand, Thomas P Schaer, Prateek Agarwal, Justin R Bendigo, George R Dodge, Weiliam Chen, Dawn M Elliott, Robert L Mauck, Neil R Malhotra, Lachlan J Smith
Degeneration of the intervertebral discs is a progressive cascade of cellular, compositional and structural changes that is frequently associated with low back pain. As the first signs of disc degeneration typically arise in the disc's central nucleus pulposus (NP), augmentation of the NP via hydrogel injection represents a promising strategy to treat early to mid-stage degeneration. The purpose of this study was to establish the translational feasibility of a triple interpenetrating network hydrogel composed of dextran, chitosan, and teleostean (DCT) for augmentation of the degenerative NP in a preclinical goat model...
July 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28734788/neuropathic-pain-in-experimental-autoimmune-neuritis-is-associated-with-altered-electrophysiological-properties-of-nociceptive-drg-neurons
#4
Omneya Taha, Thoralf Opitz, Marcus Mueller, Julika Pitsch, Albert Becker, Bernd Oliver Evert, Heinz Beck, Monika Jeub
Guillain-Barré syndrome (GBS) is an acute, immune-mediated polyradiculoneuropathy characterized by rapidly progressive paresis and sensory disturbances. Moderate to severe and often intractable neuropathic pain is a common symptom of GBS, but its underlying mechanisms are unknown. Pathology of GBS is classically attributed to demyelination of large, myelinated peripheral fibers. However, there is increasing evidence that neuropathic pain in GBS is associated with impaired function of small, unmyelinated, nociceptive fibers...
July 19, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28730748/extracellular-signal-regulated-kinase-activation-in-the-spinal-cord-contributes-to-visceral-hypersensitivity-induced-by-craniofacial-injury-followed-by-stress
#5
Y-J Zhao, J-H Li, B Hu, Y Wang, X-F Chang, R J Traub, D-Y Cao
BACKGROUND: We previously developed an animal model to examine mechanisms that underlie the emergence of visceral hypersensitivity modeling pain characteristics of temporomandibular disorder (TMD) patients with comorbid irritable bowel syndrome (IBS). In ovariectomized (OVx) rats with estradiol (E2) replacement, visceral hypersensitivity developed subsequent to masseter muscle inflammation followed by repeated forced swim (FS) stress. The purpose of this study was to investigate whether activation of extracellular signal-regulated kinase (ERK) in the spinal cord contributes to visceral hypersensitivity in this overlapping pain model...
July 21, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28729837/optimization-and-in-vivo-profiling-of-a-refined-rat-model-of-walker-256-breast-cancer-cell-induced-bone-pain-using-behavioral-radiological-histological-immunohistochemical-and-pharmacological-methods
#6
Priyank Shenoy, Andy Kuo, Irina Vetter, Maree T Smith
In the majority of patients with advanced breast cancer, there is metastatic spread to bones resulting in pain. Clinically available drug treatments for alleviation of breast cancer-induced bone pain (BCIBP) often produce inadequate pain relief due to dose-limiting side-effects. A major impediment to the discovery of novel well-tolerated analgesic agents for the relief of pain due to bony metastases is the fact that most cancer-induced bone pain models in rodents relied on the systemic injection of cancer cells, causing widespread formation of cancer metastases and poor general animal health...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28727712/intervertebral-foramen-injection-of-ozone-relieves-mechanical-allodynia-and-enhances-analgesic-effect-of-gabapentin-in-animal-model-of-neuropathic-pain
#7
Wen-Jun Luo, Fan Yang, Fei Yang, Wei Sun, Wei Zheng, Xiao-Liang Wang, Fang-Fang Wu, Jiang-Lin Wang, Jia-Shuang Wang, Su-Min Guan, Jun Chen
BACKGROUND: In a 5-year follow-up study in a hospital in southern China, it was shown that intervertebral foramen (IVF) injection of ozone at the involved segmental levels could significantly alleviate paroxysmal spontaneous pain and mechanical allodynia in patients with chronic, intractable postherpetic neuralgia (PHN) and improve the quality of life. However, so far no proof-of-concept studies in animals have been available. OBJECTIVE: This study was designed to investigate whether IVF ozone has an analgesic effect on animal models of neuropathic and inflammatory pain...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28727699/efficacy-of-palmitoylethanolamide-for-pain-a-meta-analysis
#8
Bekir Berker Artukoglu, Chad Beyer, Adi Zuloff-Shani, Ephraim Brener, Michael Howard Bloch
BACKGROUND: Palmitoylethanolamide (PEA) is a cannabimimetic compound that has been investigated as an analgesic agent in animal models and clinical trials. OBJECTIVES: We conducted a meta-analysis to examine the efficacy of PEA for treating pain in randomized, controlled trials. STUDY DESIGN: Systematic review and meta-analysis. SETTING: This meta-analysis examined all randomized, controlled trials involving the effect of PEA on pain score...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28726577/will-optogenetics-be-used-to-treat-chronic-pain-patients
#9
Hélène Beaudry, Ihab Daou, Alfredo Ribeiro-da-Silva, Philippe Séguéla
Chronic pain affects a third of the population and current treatments produce limited relief and severe side effects. An alternative strategy to decrease pain would be to directly modulate somatosensory pathways using optogenetics. Optogenetics involves the use of genetically encoded and optically active proteins, namely opsins, to control neuronal circuits. In preclinical animal models, optical silencing of peripheral nociceptors has been shown to alleviate both inflammatory and neuropathic pain. An opsin-based gene therapy to treat chronic pain patients is not ready yet, but encouraging advances have been made in optical and viral technology...
July 20, 2017: Pain Management
https://www.readbyqxmd.com/read/28724492/evaluation-of-pain-assessment-techniques-and-analgesia-efficacy-in-a-female-guinea-pig-cavia-porcellus-model-of-surgical-pain
#10
Vanessa L Oliver, Stephanie Athavale, Katherine E Simon, Lon V Kendall, Jean A Nemzek, Jennifer L Lofgren
Guinea pigs (Cavia porcellus) are a frequently used species in research, often involving potentially painful procedures. Therefore, evidence-based recommendations regarding analgesia are critically needed to optimize their wellbeing. Our laboratory examined the efficacy of carprofen and extended-release (ER) buprenorphine, alone and as a multimodal combination, for relieving postsurgical pain in guinea pigs. Animals were assessed by using evoked (mechanical hypersensitivity), nonevoked (video ethogram, cageside ethogram, time-to-consumption test), and clinical (weight loss) measurements for 96 h during baseline, anesthesia-analgesia, and hysterectomy conditions...
July 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28723879/suppression-of-sympathetic-nerve-sprouting-by-local-administration-of-an-%C3%AE-antagonist-around-the-dorsal-root-ganglion-in-a-lumbar-radiculopathy-model
#11
Izaya Ogon, Tsuneo Takebayashi, Tsuyoshi Miyakawa, Takehito Iwase, Katsumasa Tanimoto, Yoshinori Terashima, Syunsuke Jimbo, Takeshi Kobayashi, Noritsugu Tohse, Toshihiko Yamashita
STUDY DESIGN: Animal experimental study with intervention OBJECTIVE.: The purpose of this study was to elucidate whether local administration of an α-antagonist around the dorsal root ganglion (DRG) suppressed sympathetic nerve sprouting, from the acute to the chronic pain development phase, in a lumbar radiculopathy model using immunohistochemical methods. SUMMARY OF BACKGROUND DATA: The abnormal sympathetic-somatosensory interaction may underlie some forms of neuropathic pain...
July 18, 2017: Spine
https://www.readbyqxmd.com/read/28722694/early-life-vincristine-exposure-evokes-mechanical-pain-hypersensitivity-in-the-developing-rat
#12
Katie A Schappacher, Lauren Styczynski, Mark L Baccei
Vincristine (VNC) is commonly used to treat pediatric cancers, including the most prevalent childhood malignancy, acute lymphoblastic leukemia. Although clinical evidence suggests that VNC causes peripheral neuropathy in children, the degree to which pediatric chemotherapeutic regimens influence pain sensitivity throughout life remains unclear, in part because of the lack of an established animal model of chemotherapy-induced neuropathic pain during early life. Therefore, this study investigated the effects of VNC exposure between postnatal days (P) 11 and 21 on mechanical and thermal pain sensitivity in the developing rat...
May 30, 2017: Pain
https://www.readbyqxmd.com/read/28721986/evaluation-of-analgesic-and-anti-inflammatory-activity-of-a-combination-of-tramadol-ibuprofen-in-experimental-animals
#13
Chidambarann Suthakaran, Muniyagounder K Kayalvizhi, Karnam Nithya, Thozhudalangudy Ar Raja
BACKGROUND: Pain is the major concern of patients attending dental clinics, and satisfactory pain relief has always been difficult to achieve. Since the pathophysiology of pain is a complex, central and peripheral nervous system process, combined analgesic regimens with different mechanisms of action as a multimodal approach are becoming popular among the clinicians and dentists. OBJECTIVES: The aim of the present study was to evaluate the analgesic and anti-inflammatory activity of ibuprofen and tramadol when used alone or in combination in animal models of pain and inflammation...
May 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28715515/surgical-suture-releasing-macrophage-targeted-drug-loaded-nanoparticles-for-an-enhanced-anti-inflammatory-effect
#14
Hansol Kim, Byung Hwi Kim, Beom Kang Huh, Yeon Chun Yoo, Chan Yeong Heo, Young Bin Choy, Ji-Ho Park
A surgical suture is a medical device to close the wound site of skin and organs but excessive inflammation surrounding the suture can disrupt the wound healing process. Although post-operative prescription of anti-inflammatory drugs is used to manage the inflammation, the need for local drug delivery systems has been rising because of low bioavailability and fast clearance of drugs. In this work, we proposed a new strategy for a local anti-inflammatory device by incorporating macrophage-targeted anti-inflammatory nanoparticles into the suture...
July 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28715356/a-mouse-model-for-pain-and-neuroplastic-changes-associated-with-pancreatic-ductal-adenocarcinoma
#15
Deepitha Selvaraj, Michael Hirth, Jagadeesh Gandla, Rohini Kuner
Pancreatic ductal adenocarcinoma (PDAC) continues to be one of the deadliest human malignancies and is associated with excruciating pain, which is a serious complication and severely impacts the quality of life in patients. In human patients, poor survival prognosis is linked to remarkable remodeling of intrapancreatic nerves, which, in turn, is correlated to increased pain intensity. Understanding mechanisms underlying pain associated with PDAC has been hampered by the lack of animal models which replicate all germane aspects of the disease and importantly, enable analyses of pain associated with PDAC...
August 2017: Pain
https://www.readbyqxmd.com/read/28715273/physiological-effects-of-physical-therapy-interventions-on-lumbar-intervertebral-discs-a-systematic-review
#16
Ulrike H Mitchell, Kevin Helgeson, Paul Mintken
BACKGROUND CONTEXT: The use of physical therapy has been recommended in the treatment of low back pain based on primarily mechanical and neurophysiological effects. Recent studies have measured the physiological effects of physical therapy interventions, including manual therapy and traction, on the intervertebral discs (IVD), and these findings may have implications for the long-term management or even prevention of low back pain. PURPOSE: The objective of this systematic review is to investigate the literature regarding possible physiological effects of physical therapy interventions on the intervertebral disc (IVD)...
July 17, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28714350/activation-and-expression-of-%C3%AE-calpain-in-dorsal-root-contributes-to-rtx-induced-mechanical-allodynia
#17
Xiao-Cui Yuan, Cai-Hua Wu, Fang Gao, Hong-Ping Li, Hong-Chun Xiang, He Zhu, Xiao-Li Pan, Li-Xue Lin, Yan-Shen Liu, Wei Yu, Bo Tian, Xian-Fang Meng, Man Li
Background Calpain is a calcium-dependent cysteine protease, and inhibition of calpain by pre-treatment with MDL28170 attenuated the rat mechanical allodynia in a variety of pain models. Postherpetic neuralgia (Shingles) is a neuropathic pain conditioned with the presence of profound mechanical allodynia. Systemic injection of resiniferatoxin can reproduce the clinical symptoms of postherpetic neuralgia. In this study, we determined to study whether activation of calpain contributes to cleave the myelin basic protein of dorsal root and is involved in resiniferatoxin-induced mechanical allodynia of postherpetic neuralgia animal model...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28713051/3d-visualization-and-pathological-characteristics-of-cartilage-and-subchondral-bone-changes-in-the-lumbar-facet-joint-of-an-ovariectomized-mouse-model
#18
Yong Cao, Shuangfei Ni, Tianding Wu, Chunyue Duan, Shenghui Liao, Jianzhong Hu
BACKGROUD CONTEXT: Low back pain (LBP) is more prevalent among postmenopausal women than men. Ovariectomy (OVX) is an established animal model that mimics the estrogen deficiency of postmenopausal women. Little is known about the morphological properties of cartilage and subchondral bone changes in the lumbar facet joint (LFJ) of an OVX mouse model. PURPOSE: The purpose of this study is to characterize the morphological change of cartilage and subchondral bone in LFJ of an OVX mouse model...
July 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28706449/effects-of-tianeptine-on-symptoms-of-fibromyalgia-via-bdnf-signaling-in-a-fibromyalgia-animal-model
#19
Hwayoung Lee, Jiyun Im, Hansol Won, Wooyoung Nam, Young Ock Kim, Sang Won Lee, Sanghyun Lee, Ik-Hyun Cho, Hyung-Ki Kim, Jun-Tack Kwon, Hak-Jae Kim
Previous reports have suggested that physical and psychological stresses may trigger fibromyalgia (FM). Stress is an important risk factor in the development of depression and memory impairments. Antidepressants have been used to prevent stress-induced abnormal pain sensation. Among various antidepressants, tianeptine has been reported to be able to prevent neurodegeneration due to chronic stress and reverse decreases in hippocampal volume. To assess the possible effect of tianeptine on FM symptoms, we constructed a FM animal model induced by restraint stress with intermittent cold stress...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28704800/inclusion-complex-between-%C3%AE-cyclodextrin-and-hecogenin-acetate-produces-superior-analgesic-effect-in-animal-models-for-orofacial-pain
#20
Yasmim M B G Carvalho, Paula P Menezes, Bruna M H Sousa, Bruno S Lima, Igor A S Trindade, Mairim R Serafini, Erik W M Pereira, Marilia M Rezende, Jullyana S S Quintans, Lucindo J Quintans-Júnior, Celso V Nakamura, Edeildo F Silva-Júnior, Alessandre C Crispim, Thiago M Aquino, Adriano A S Araújo
Hecogenin acetate (HA) is a steroidal sapogenin-acetylated with pharmacological properties which have already been described in the literature such as, anti-inflammatory, anti-hyperalgesic and antinociceptive, but it has low solubility in aqueous media. Therefore, in an attempt to overcome this, we set out to create inclusion complexes between HA and b-cyclodextrin (b-CD) and evaluate the antinociceptive effects in the orofacial nociception in mice. The complexes were prepared using different methods in the molar ratios 1:1 and 1:2 and characterized physicochemically...
July 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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