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https://www.readbyqxmd.com/read/28630099/kndy-neurone-activation-prior-to-the-lh-surge-of-the-ewe-is-disrupted-by-lps
#1
Chrysanthi Fergani, Jean Routly, David Jones, Lucy Pickavance, Robert Frank Smith, Hilary Dobson
In the ewe, steroid hormones act on the hypothalamic arcuate nucleus (ARC) to initiate the GnRH/LH surge. Within the ARC, steroid signal transduction may be mediated by dopamine, β-endorphin or neuropeptide Y (NPY) expressing cells, as well as those co-localising kisspeptin, neurokinin B (NKB), and dynorphin (termed KNDy). We investigated the time during the follicular phase when these cells become activated (i.e., co-localise c-Fos) relative to the timing of the LH surge onset and may, therefore, be involved in the surge generating mechanism...
June 19, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28596129/sync-to-link-endorphin-mediated-synchrony-effects-on-cooperation
#2
Martin Lang, Vladimír Bahna, John H Shaver, Paul Reddish, Dimitris Xygalatas
Behavioural synchronization has been shown to facilitate social bonding and cooperation but the mechanisms through which such effects are attained are poorly understood. In the current study, participants interacted with a pre-recorded confederate who exhibited different rates of synchrony, and we investigated three mechanisms for the effects of synchrony on likeability and trusting behaviour: self-other overlap, perceived cooperation, and opioid system activation measured via pain threshold. We show that engaging in highly synchronous behaviour activates all three mechanisms, and that these mechanisms mediate the effects of synchrony on liking and investment in a Trust Game...
June 6, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28587847/molecular-cloning-and-tissue-distribution-of-crh-and-pomc-mrna-in-the-fat-tailed-dunnart-sminthopsis-crassicaudata-an-australian-marsupial
#3
Ellyse B Noy, Melissa K Scott, Sylvia V H Grommen, Kylie A Robert, Bert De Groef
Like all vertebrates, marsupials respond to stressors with the activation of the hypothalamo-pituitary-adrenal axis. However, peptides operating at the higher regulatory levels of this hormonal system, i.e. corticotropin-releasing hormone (CRH) and adrenocorticotropic hormone (ACTH), have not been investigated in marsupials. Here we report the molecular cloning of the precursor cDNAs of CRH (prepro-CRH) and of ACTH (proopiomelanocortin; POMC) in an Australian marsupial, the fat-tailed dunnart (Sminthopsis crassicaudata)...
June 3, 2017: Gene
https://www.readbyqxmd.com/read/28584120/correction-for-pearce-et-al-variation-in-the-%C3%AE-endorphin-oxytocin-and-dopamine-receptor-genes-is-associated-with-different-dimensions-of-human-sociality
#4
(no author information available yet)
No abstract text is available yet for this article.
June 5, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28580520/enzyme-immunoassay-of-antibodies-to-endogenous-bioregulators-for-evaluating-the-risk-of-heart-disease
#5
V S Morozova, S N Petrochenko, M A Myagkova, S O Bachurin
The levels of natural antibodies to β-endorphin, bradykinin, histamine, dopamine, and serotonin were measured in 271 cardiological patients in order to evaluate the severity of their clinical status. The patients were distributed into groups differing by the course of the pathological process. The levels of natural antibodies to all antigens were maximum in patients with cardiosclerosis: the content of antibodies to β-endorphin surpassed the control by 46%, to histamine by 62%, to bradykinin by 36%, to dopamine by 49%, and to serotonin by 65%...
June 5, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28554003/opioids-and-opioid-receptors-orchestrate-wound-repair
#6
Ying Wang, Mihir Gupta, Tasneem Poonawala, Mariya Farooqui, Yunfang Li, Fei Peng, Sheldon Rao, Michael Ansonoff, John E Pintar, Kalpna Gupta
We have previously shown that topical opioids including morphine and its congeners promote healing of full thickness ischemic wounds in rats. We examined the contribution of mu opioid receptor (MOPr)-mediated healing of full thickness ischemic wounds using MOPr and delta or kappa opioid receptor knockout (KO) mice. Wound closure in the early (day 5) as well as later phases was delayed in topical morphine or PBS-treated MOPr-KO mice compared with reciprocal treatments of wounds in wild-type (WT) mice. MOPr expression was significantly upregulated at 30 min in the wound margins and colocalized with wound margins and vasculature in the epidermal and dermal layers of the skin...
May 18, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28545527/what-intrinsic-factors-influence-responsiveness-to-acupuncture-in-pain-a-review-of-pre-clinical-studies-that-used-responder-analysis
#7
Yu-Kang Kim, Ji-Yeun Park, Seung-Nam Kim, Mijung Yeom, Seungmin Lee, Ju-Young Oh, Hyangsook Lee, Younbyoung Chae, Dae-Hyun Hahm, Hi-Joon Park
BACKGROUND: Not many studies have investigated individual sensitivity to acupuncture. To explore the intrinsic factors related to individual responses to acupuncture, we reviewed published pre-clinical studies using responder analysis on pain. METHODS: We searched the PubMed and EMBASE databases to June 2015. We included pre-clinical reports describing responders and non-responders to anti-nociceptive and analgesic effects of acupuncture in animal study. We identified the potential intrinsic factors which might be related with the response to acupuncture...
May 25, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28538378/effects-of-intensive-training-on-menstrual-function-and-certain-serum-hormones-and-peptides-related-to-the-female-reproductive-system
#8
Geum Joon Cho, Sung Won Han, Jung-Ho Shin, Tak Kim
The aim of this study was to assess the effects of intensive training on menstrual function and related serum hormones and peptides.Forty female participants who attended a training course for an officer at the Korea Third Military Academy, and had regular menstrual periods were enrolled. Menstrual questionnaires and fasting blood samples were collected before entry and at 4-week intervals for 8 weeks. The levels of corticotropin-releasing hormone (CRH), cortisol, prolactin, endorphin-β, neuropeptide Y (NPY), leptin, orexin-A, ghrelin, follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), thyrotropin (TSH), and thyroxine (T4) were determined...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28510133/analysis-of-immune-biochemical-indicators-to-assess-the-risk-of-developing-cardiological-pathology
#9
V S Morozova, I A Moseikin, S N Petrochenko, M A Myagkova, L F Panchenko
Prognostic immuno-biochemical tests to assess the severity of the condition of patients with cardiac diseases were developed. A comparative analysis of clinical and laboratory blood parameters, which are used in practice for the diagnosis and prognosis of diseases, and an analysis of the content of natural antibodies (n-Abs) to β-endorphin, bradykinin, histamine, dopamine, and serotonin were performed. A significant correlation between the level of n-Abs, the main biochemical parameters, and the content of blood corpuscles was revealed...
March 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28461468/variation-in-the-%C3%AE-endorphin-oxytocin-and-dopamine-receptor-genes-is-associated-with-different-dimensions-of-human-sociality
#10
Eiluned Pearce, Rafael Wlodarski, Anna Machin, Robin I M Dunbar
There is growing evidence that the number and quality of social relationships have substantial impacts on health, well-being, and longevity, and, at least in animals, on reproductive fitness. Although it is widely recognized that these outcomes are mediated by a number of neuropeptides, the roles these play remain debated. We suggest that an overemphasis on one neuropeptide (oxytocin), combined with a failure to distinguish between different social domains, has obscured the complexity involved. We use variation in 33 SNPs for the receptor genes for six well-known social neuropeptides in relation to three separate domains of sociality (social disposition, dyadic relationships, and social networks) to show that three neuropeptides (β-endorphin, oxytocin, and dopamine) play particularly important roles, with each being associated predominantly with a different social domain...
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28461253/age-differences-in-the-time-course-and-magnitude-of-changes-in-circulating-neuropeptides-following-pain-evocation-in-humans
#11
Joseph L Riley, Yenisel Cruz-Almeida, Margarete C Dasilva Ribeiro, Corey B Simon, Nathan R Eckert, Maria Aguirre, Heather L Sorenson, Patrick J Tighe, Robert R Edwards, Shannon M Wallet
This study tested the hypothesis that older adults would have a stronger response for substance P (facilitatory) but weaker response to β-endorphin (inhibitory), both in magnitude and time-course. Eight younger and 9 older adults underwent 3 experimental sessions using well-validated laboratory pain models: cold pressor task (CPT), contact heat pain (HP), and a non-painful control. Blood was collected through an indwelling catheter at baseline and 3, 15, 30, 45, and 60-minutes post-stimuli administration. Older adults had higher baseline levels of both neuropeptides suggesting increased peripheral activity compared to younger adults...
April 28, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28413714/cerebrospinal-fluid-and-plasma-%C3%AE-endorphin-levels-in-children-with-cerebral-malaria
#12
Oluwatosin Eunice Olorunmoteni, Oluwagbemiga Oyewole Adeodu, Saheed B A Oseni, Efere M Obuotor
OBJECTIVES: Cerebral malaria (CM) is the most lethal form of malaria, yet its pathogenesis is not fully understood. Cytoadherence, sequestration, alterations in cytokine expression, inflammation, and microvascular obstruction are all hypothesized to be important in the aetio-pathogenesis of coma which characterizes cerebral malaria and the death which sometimes result. Beta (β)-endorphin has been postulated to be involved in the pathogenetic processes of inflammation and cytokine expression, although the exact role is unknown...
April 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28399090/-a-comparative-study-of-immune-and-clinical-indicators-in-radicular-and-myofascial-back-pain
#13
A I Levashova, V S Morozova, S N Petrochenko, М А Myagkova, I A Moseikin
AIM: To compare immunochemical and clinical parameters in patients with chronic radicular and myofascial back pain. MATERIAL AND METHODS: A study included 92 patients (55 men and 37 women) with radicular pain syndrome and 97 patients (33 men and 64 women) with myofascial pain syndrome. Pain status was assessed with the differential visual analogous scale (at rest, on movement, at night and during spontaneous pain). Tensor algometry was used to measure pain intolerance thresholds at day and night...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28333316/convergent-balancing-selection-on-the-mu-opioid-receptor-in-primates
#14
Carolyn G Sweeney, Juliette M Rando, Helen N Panas, Gregory M Miller, Donna M Platt, Eric J Vallender
The mu opioid receptor is involved in many natural processes including stress response, pleasure, and pain. Mutations in the gene also have been associated with opiate and alcohol addictions as well as with responsivity to medication targeting these disorders. Two common and mutually exclusive polymorphisms have been identified in humans, A118G (N40D), found commonly in non-African populations, and C17T (V6A), found almost exclusively in African populations. Although A118G has been studied extensively for associations and in functional assays, C17T is much less well understood...
July 1, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28325149/low-dose-naltrexone-in-the-treatment-of-fibromyalgia
#15
Samy K Metyas, Karen Yeter, John Solyman, Daniel Arkfeld
Fibromyalgia is a chronic pain disorder characterized by diffuse musculoskeletal pain, fatigue, sleep disturbance and cognitive impairment. A significant number of fibromyalgia patients do not respond adequately to the current drugs (pregabalin, milnacipran, duloxetine) approved for fibromyalgia treatment by the Food and Drug Administration (FDA). Thus, there is still a need for adjunctive therapies. Naltrexone is an opioid receptor antagonist used to treat alcohol and opioid dependence. It is hypothesized that low dose naltrexone causes transient blockade of opioid receptors centrally resulting in a rebound of endorphin function which may attenuate pain in fibromyalgia...
March 21, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28284896/progesterone-increased-%C3%AE-endorphin-innervation-of-the-locus-coeruleus-but-ovarian-steroids-had-no-effect-on-noradrenergic-neurodegeneration
#16
Fernanda B Lima, Cristiane M Leite, Cynthia L Bethea, Janete A Anselmo-Franci
With the decline of ovarian steroids levels at menopause, many women experience an increase in anxiety and stress sensitivity. The locus coeruleus (LC), a central source of noradrenaline (NE), is activated by stress and is inhibited by β-endorphin. Moreover, increased NE has been implicated in pathological anxiety syndromes. Hormone replacement therapy (HRT) in menopause appears to decrease anxiety and vulnerability to stress. Therefore, we questioned the effect of HRT on the inhibitory β-endorphin innervation of the LC...
May 15, 2017: Brain Research
https://www.readbyqxmd.com/read/28283814/effect-of-photobiomodulation-therapy-808%C3%A2-nm-in-the-control-of-neuropathic-pain-in-mice
#17
Ana Laura Martins de Andrade, Paulo Sérgio Bossini, Azair Liane Matos do Canto De Souza, Ariane Dutra Sanchez, Nivaldo Antonio Parizotto
Neuropathic pain can be defined as the pain initiated or caused by a primary lesion or dysfunction of the central or peripheral nervous system. Photobiomodulation therapy (PBM) stands out among the physical therapy resources used for analgesia. However, application parameters, especially the energy density, remain controversial in the literature. Therefore, this study aimed to investigate the PBM effect, in different energy densities to control neuropathic pain in mice. Fifty (50) mice were induced to neuropathy by chronic constriction surgery of the sciatic nerve (CCI), treated with PBM (808 nm), and divided into five groups: GP (PBM simulation), GS (sham), GL10, GL20, GL40 (energy density of 10, 20, and 40 J/cm(2), respectively)...
March 10, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28274721/role-of-%C3%AE-endorphin-in-pain-relief-following-high-rate-repetitive-transcranial-magnetic-stimulation-in-migraine
#18
Usha Kant Misra, Jayantee Kalita, Gyanesh Tripathi, Sanjeev Kumar Bhoi
BACKGROUND: In migraine, high rate repetitive transcranial magnetic stimulation (rTMS) has been reported to be effective, and β endorphin (BE) may have a role in headache relief. OBJECTIVE: To report the role of BE and its μ (MOR) and δ opioid receptors (DOR) in headache relief following high rate rTMS in migraine. METHODS: Ninety-three migraine patients having more than 4 attacks per month were included. 10 Hz rTMS (600 pulses in 10 trains) was delivered to left motor cortex; 3 sessions to 24 (group 1), 1 session to 22 (group II) and sham stimulation to 47 patients (group III)...
May 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28261089/sex-and-age-differences-in-motion-sickness-in-rats-the-correlation-with-blood-hormone-responses-and-neuronal-activation-in-the-vestibular-and-autonomic-nuclei
#19
Wei Zhou, Junqin Wang, Leilei Pan, Ruirui Qi, Peng Liu, Jiluo Liu, Yiling Cai
Many studies have demonstrated sex and age differences in motion sickness, but the underlying physiological basis is still in controversy. In the present study, we tried to investigate the potential correlates of endocrine and/or neuronal activity with sex and age differences in rats with motion sickness. LiCl-induced nausea symptom was evaluated by conditioned gaping. Motion sickness was assessed by measurement of autonomic responses (i.e., conditioned gaping and defecation responses), motor impairments (i...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28246449/influence-of-training-and-competitive-sessions-on-peripheral-%C3%AE-endorphin-levels-in-training-show-jumping-horses
#20
Cristina Cravana, P Medica, G Ragonese, E Fazio
AIM: To investigate the effects of training sessions on circulating β-endorphin changes in sport horses before and after competition and to ascertain whether competition would affect this response. MATERIALS AND METHODS: A total of 24 trained jumping horses were randomly assigned to one of two training groups: Group A (competing) and Group B (not competing). To determined plasma β-endorphin concentrations, two pre- and post-competition training weeks at aerobic workout and two competitive show jumping event days at anaerobic workout were measured before, 5 and 30 min after exercise...
January 2017: Veterinary World
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