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1.
Conserv Biol ; 38(2): e14213, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37904666

RESUMO

Monitoring the governance and management effectiveness of area-based conservation has long been recognized as an important foundation for achieving national and global biodiversity goals and enabling adaptive management. However, there are still many barriers that prevent conservation actors, including those affected by governance and management systems from implementing conservation activities and programs and from gathering and using data on governance and management to inform decision-making across spatial scales and through time. We explored current and past efforts to assess governance and management effectiveness and barriers actors face in using the resulting data and insights to inform conservation decision-making. To help overcome these barriers, we developed Elinor, a free and open-source monitoring tool that builds on the work of Nobel Prize winner Elinor Ostrom to facilitate the gathering, storing, sharing, analyzing, and use of data on environmental governance and management across spatial scales and for areas under different governance and management types. We consider the process of codesigning and piloting Elinor with conservation scientists and practitioners and the main components of the assessment and online data system. We also consider how Elinor complements existing approaches by addressing governance and management in a single assessment at a high level for different types of area-based conservation, providing flexible options for data collection, and integrating a data system with an assessment that can support data use and sharing across different spatial scales, including global monitoring of the Global Biodiversity Framework. Although challenges will continue, the process of developing Elinor and the tool itself offer tangible solutions to barriers that prevent the systematic collection and use of governance and management data. With broader uptake, Elinor can play a valuable role in enabling more effective, inclusive, and durable area-based conservation.


Introducción de Elinor para el monitoreo de la gobernanza y la gestión de la conservación con base en zonas geográficas Resumen El monitoreo de la efectividad de la gobernanza y de la gestión de la conservación basada en zonas geográficas ha sido reconocido durante mucho tiempo como una base importante para alcanzar las metas nacionales y mundiales de la biodiversidad y permitir un manejo adaptativo. Sin embargo, todavía existen barreras que evitan que los actores de la conservación, incluidos aquellos afectados por los sistemas de gobernanza y gestión, implementen actividades y programas de conservación y recopilen y usen datos de la gobernanza y la gestión para informar las decisiones a lo largo de las escalas espaciales y a través del tiempo. Exploramos los esfuerzos hechos en la actualidad y en el pasado para evaluar la efectividad de la gobernanza y la gestión así como las barreras que los actores enfrentan al usar los datos y el conocimiento resultantes para informar la toma de decisiones de conservación. Para ayudar a derribar estas barreras desarrollamos Elinor, una herramienta de monitoreo gratuita y de software libre que parte del trabajo de la ganadora del Premio Nobel Elinor Ostrom, para facilitar la recopilación, almacenamiento, divulgación, análisis y uso de los datos sobre la gobernanza y la gestión ambiental en las escalas espaciales y para las zonas con diferentes tipos de gobernanza y gestión. Planteamos co­diseñar y pilotear Elinor con los científicos y practicantes de la conservación y usando los componentes principales del sistema de evaluación y de datos en línea. También planteamos cómo Elinor complementa las estrategias existentes al abordar la gobernanza y la gestión en una sola evaluación a un nivel elevado para diferentes tipos de conservación basada en zonas geográficas, lo que proporciona opciones flexibles para la colecta de datos, e integramos un sistema de datos con una evaluación que soporta el uso y divulgación de datos en diferentes escalas espaciales, incluido el Marco Mundial para la Biodiversidad. Aunque los retos seguirán existiendo, el proceso de desarrollo de Elinor y la propia herramienta ofrecen soluciones tangibles a las barreras que previenen la colecta sistemática y el uso de datos de la gobernanza y la gestión. Con una mayor aceptación, Elinor puede tener un papel importante en el momento de hacer posible una conservación basada en zonas geográficas más eficaz, integradora y duradera.


Assuntos
Conservação dos Recursos Naturais , Política Ambiental , Conservação dos Recursos Naturais/métodos , Tomada de Decisões , Biodiversidade , Coleta de Dados
2.
Ann Emerg Med ; 76(3): 280-290, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32828327

RESUMO

STUDY OBJECTIVE: Emergency department (ED) visits provide an important opportunity for elder abuse identification. Our objective was to assess the accuracy of the ED Senior Abuse Identification (ED Senior AID) tool for the identification of elder abuse. METHODS: We conducted a study of the ED Senior AID tool in 3 US EDs. Participants were English-speaking patients 65 years old and older who provided consent or for whom a legally authorized representative provided consent. Research nurses administered the screening tool, which includes a brief mental status assessment, questions about elder abuse, and a physical examination for patients who lack the ability to report abuse or for whom the presence or absence of abuse was uncertain. The reference standard was based on the majority opinion of a longitudinal, expert, all data (LEAD) panel following review and discussion of medical records, clinical social worker notes, and a structured social and behavioral evaluation. For the reference standard, LEAD panel members were blinded to the results of the screening tool. RESULTS: Of 916 enrolled patients, 33 (3.6%) screened positive for elder abuse. The LEAD panel reviewed 125 cases: all 33 with positive screen results and a 10% random sample of negative screen results. Of these, the panel identified 17 cases as positive for elder abuse, including 16 of the 33 cases that screened positive. The ED Senior AID tool had a sensitivity of 94.1% (95% confidence interval [CI] 71.3% to 99.9%) and specificity of 84.3% (95% CI 76.0% to 90.6%). CONCLUSION: This multicenter study found the ED Senior AID tool to have a high sensitivity and specificity as a screening tool for elder abuse, albeit with wide CIs.


Assuntos
Abuso de Idosos/diagnóstico , Avaliação Geriátrica , Idoso , Idoso de 80 Anos ou mais , Serviço Hospitalar de Emergência , Feminino , Serviços de Saúde para Idosos , Humanos , Masculino , Sensibilidade e Especificidade , Estados Unidos
3.
Biosensors (Basel) ; 8(2)2018 Apr 13.
Artigo em Inglês | MEDLINE | ID: mdl-29652815

RESUMO

Cases of Alzheimer's disease (AD) are rising exponentially due to increasing global life expectancy. There are approximately 50 million sufferers worldwide, with prevalence rising most rapidly in low-income countries such as Africa and Asia. There is currently no definite diagnosis of AD until after death, thus an early biomarker for AD is urgently required in order to administer timelier and more effective interventions. Olfactory dysfunction (problems with the sense of smell) is one of the earliest, preclinical symptoms observed in AD. Olfaction is a promising early biomarker for use worldwide as it is easy, cheap to measure, and not reliant on specialist clinicians or laboratory analysis. We carried out a meta-analysis to determine the credibility of olfaction in diagnosing AD in the preclinical stages, by comparing olfaction in healthy controls against AD patients and patients with mild cognitive impairment (MCI). Data from 10 articles were subjected to two comparative meta-analyses. In the case of AD, the results illustrated that the overall magnitude of effect size was more apparent, d = -1.63, 95% CI [-1.95, -1.31], in comparison to that of MCI, d = -0.81, 95% CI [-1.08, -0.55]. This shows that olfaction worsens progressively as patients progress from MCI to AD, highlighting the potential for olfactory dysfunction to identify AD in the preclinical stages prior to MCI.


Assuntos
Doença de Alzheimer/diagnóstico , Disfunção Cognitiva/etiologia , Olfato/genética , Doença de Alzheimer/patologia , Disfunção Cognitiva/patologia , Feminino , Humanos , Masculino
4.
Intellect Dev Disabil ; 54(6): 427-439, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27893310

RESUMO

Participation is a central aspect of human functioning and a key focus of research and practice in the intellectual disability field. However, there is not an accepted definition of participation that guides research and practice. To inform the development of a definition, a scoping review of the intellectual disability literature from 2001-2015 was conducted. Findings suggest that existing research rarely uses definitions of participation, but does examine participation across multiple domains and addresses issues of access and inclusion. Less focus was placed on individual aspects of participation such as meaning, responsibility, and choice. Based on the findings, implications for future research and practice are provided.


Assuntos
Deficiência Intelectual/psicologia , Deficiência Intelectual/reabilitação , Avaliação de Processos e Resultados em Cuidados de Saúde , Participação do Paciente , Humanos
5.
J Pain Symptom Manage ; 35(2): 136-52, 2008 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-18178370

RESUMO

Breakthrough pain is a prevalent cancer pain syndrome, and research is needed to identify more effective interventions to manage it. A validated tool to assess breakthrough pain in a standard and reliable manner is urgently needed to support the conduct of clinical trials in breakthrough pain. To address this need, we developed a breakthrough pain assessment tool for research purposes. The current study was undertaken to gather validity evidence for this breakthrough pain assessment tool, using a Delphi process involving an expert panel review, followed by a think-aloud process involving patients with cancer-related breakthrough pain. Two expert panels were formed: a national panel (within Canada; n=16) and an international panel (including experts from North America, UK, Europe, the Middle East, Australia, and New Zealand; n=22). Each panel participated in one anonymous survey round. Response rates were 56% (national panel) and 73% (international panel). The Delphi process revealed substantial consensus on the content of the tool, which increased between rounds of review. The overall level of agreement with the tool, averaged over the four evaluated aspects of all items, was 80% among national panelists and 88% among international panelists. Nine patients completed the think-aloud study. They were able to understand and complete the tool and provided specific direction on its improvement. The validity evidence gathered in this study suggests the Alberta Breakthrough Pain Assessment Tool is conceptually grounded and is understandable by patients and clinicians. Further validation of this tool as an assessment measure within clinical trials research is warranted.


Assuntos
Neoplasias/complicações , Medição da Dor/normas , Dor/diagnóstico , Alberta , Técnica Delphi , Feminino , Humanos , Entrevistas como Assunto , Masculino , Dor/etiologia , Reprodutibilidade dos Testes
6.
J Pain Symptom Manage ; 34(2): 171-82, 2007 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-17662911

RESUMO

Cancer pain is a prevalent and serious public health issue, and more effective treatments are needed. This study evaluates the analgesic activity of tetrodotoxin, a highly selective sodium channel blocker, in cancer pain. A Phase IIa, open-label, multicenter, dose-escalation study of intramuscular tetrodotoxin was conducted in patients with severe, unrelieved cancer pain. The study design called for six ascending dose levels of intramuscular tetrodotoxin, administered over a four-day treatment period in hospitalized patients, with six patients to be enrolled within each successive dose level. Twenty-four patients underwent 31 courses of treatment at doses ranging from 15 to 90 microg daily, administered in divided doses, over four days. Most patients described transient perioral tingling or other mild sensory phenomena within about an hour of each treatment. Nausea and other toxicities were generally mild, but two patients experienced a serious adverse event, truncal and gait ataxia, that resolved over days. Seventeen of 31 treatments resulted in clinically meaningful reductions in pain intensity, and relief of pain persisted for up to two weeks or longer. Two patients had opioids held due to narcosis concurrent with relief of pain. Somatic, visceral, or neuropathic pain could all respond, but it was not possible to predict which patients were more likely to have an analgesic effect. Tetrodotoxin was overall safe. It effectively relieved severe, treatment-resistant cancer pain in the majority of patients and often for prolonged periods after treatment. It may have a novel mechanism of analgesic effect. Further study is warranted.


Assuntos
Anestésicos Locais/administração & dosagem , Neoplasias/complicações , Dor/tratamento farmacológico , Dor/etiologia , Tetrodotoxina/administração & dosagem , Adulto , Idoso , Anestésicos Locais/efeitos adversos , Relação Dose-Resposta a Droga , Feminino , Humanos , Injeções Intramusculares , Masculino , Pessoa de Meia-Idade , Tetrodotoxina/efeitos adversos , Resultado do Tratamento
7.
J Palliat Med ; 10(2): 331-7, 2007 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-17472503

RESUMO

BACKGROUND: Breakthrough pain is a highly prevalent and difficult to manage cancer pain problem. Current strategies are frequently ineffective, in part because of a mismatch between the sudden onset and brief duration of breakthrough pain and the slower onset and more prolonged duration of oral immediate-release opioids. Novel analgesic interventions are needed to provide a closer match between the temporal profile of the pain and the pharmacodynamics of the pain medication, and novel models of study of breakthrough pain are needed to evaluate them. METHODS: This is an open-label feasibility study of a model to evaluate sublingual methadone for cancer-related breakthrough pain. The model has three phases: screening, upward titration, and optimal dose evaluation. RESULTS: Seven patients with breakthrough pain because of cancer entered the upward titration phase of the trial, and 61 episodes of breakthrough pain were evaluated with sublingual methadone at escalating doses ranging from 2-18 mg. Toxicity was generally mild and similar to patients' prior breakthrough medication. Four patients entered the optimal dose evaluation phase, and 39 discrete episodes of breakthrough pain were available for evaluation. Significant relief of pain occurred with a median onset of 5 minutes, and no serious adverse events were encountered. CONCLUSIONS: This model of assessment of breakthrough pain, whereby each episode of pain is treated as a separate data set and multiple discrete episodes of breakthrough pain are assessed every 5 minutes in each patient, appears to be feasible within the cancer pain population. Preliminary results suggest a very rapid onset of relief of breakthrough pain with sublingual methadone when administered at the optimal dose, consistent with a highly favorable early pharmacodynamic profile of methadone administered via this route. Further study is warranted.


Assuntos
Analgésicos Opioides/administração & dosagem , Protocolos Clínicos , Monitoramento de Medicamentos , Cuidado Periódico , Metadona/administração & dosagem , Neoplasias/complicações , Dor Intratável/tratamento farmacológico , Administração Sublingual , Idoso , Alberta , Analgésicos Opioides/farmacocinética , Analgésicos Opioides/uso terapêutico , Estudos de Viabilidade , Feminino , Humanos , Masculino , Metadona/farmacocinética , Metadona/uso terapêutico , Pessoa de Meia-Idade , Medição da Dor , Dor Intratável/etiologia , Cuidados Paliativos , Projetos Piloto , Fatores de Tempo , Resultado do Tratamento
8.
J Palliat Med ; 10(1): 47-55, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17298253

RESUMO

BACKGROUND: Breakthrough pain is a prevalent and serious problem in patients with cancer. However, it is not known how best to predict the effective dose of breakthrough opioid for any given patient. METHODS: Data were pooled and reanalyzed from three large, randomized clinical trials of the rapidly absorbed oral transmucosal fentanyl citrate lozenges (OTFC) in which patients were carefully titrated to an optimal OTFC dose. The relationships between the optimal OTFC dose, patients' previous opioid dose, 24-hour total opioid, and patient characteristics were explored to determine whether the optimal OTFC dose can be predicted based on pretreatment clinical factors. RESULTS: The cohort included 188 patients within the three trials whose breakthrough pain was effectively managed with OTFC. Prior to entry into the trial, the average breakthrough opioid dose in the 188 patients was 12% of the daily dose of scheduled opioid but strikingly, ranged from 1%-72%. The optimal OTFC dose was poorly correlated with patients' scheduled or previous breakthrough opioid doses. The only clinically meaningful correlation was that the average final OTFC dose significantly decreased with increasing age. Overall, there was enormous interindividual variability in patients' dose requirements for breakthrough pain. CONCLUSIONS: This is the largest study to date of the relationship between clinical variables and the effective dose of OTFC when titrated to effect for breakthrough cancer pain. These results suggest that use of breakthrough medication should routinely be individualized with a titration strategy separate from the around-the-clock medication, according to each patient's response to their breakthrough opioid.


Assuntos
Analgésicos Opioides/administração & dosagem , Fentanila/administração & dosagem , Neoplasias/fisiopatologia , Dor/tratamento farmacológico , Administração Oral , Adulto , Idoso , Idoso de 80 Anos ou mais , Analgésicos Opioides/química , Analgésicos Opioides/uso terapêutico , Feminino , Fentanila/química , Fentanila/uso terapêutico , Humanos , Masculino , Pessoa de Meia-Idade , Dor/etiologia , Ensaios Clínicos Controlados Aleatórios como Assunto , Titulometria/métodos
10.
J Pain Symptom Manage ; 28(6): 619-25, 2004 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-15589088

RESUMO

Methadone is effective for chronic cancer pain, but its early pharmacodynamic profile and effectiveness for breakthrough pain remain uncertain. This was an open-label, non-randomized, crossover study comparing the use of oral methadone for breakthrough pain with patients' usual opioid. Study variables included pain intensity (pretreatment and at 10-minute intervals post treatment), treatment-related side effects, and treatment satisfaction. In 37 discrete episodes of breakthrough pain, onset of analgesic effect of a titrated dose of oral methadone was rapid for all patients; 3 of 6 study patients experienced an onset of relief by 10 minutes post-ingestion. The adverse effect profile of oral methadone was not different from patients' usual 'rescue' opioid, and patients were moderately to completely satisfied with oral methadone as a breakthrough pain medication. These observations suggest that oral methadone can have a rapid onset of analgesic action and may have a legitimate role in the management of cancer-related breakthrough pain.


Assuntos
Metadona/administração & dosagem , Neoplasias/complicações , Dor/tratamento farmacológico , Dor/etiologia , Cuidados Paliativos/estatística & dados numéricos , Satisfação do Paciente , Administração Oral , Adulto , Idoso , Analgésicos Opioides/administração & dosagem , Doença Crônica , Estudos Cross-Over , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Fatores de Tempo , Falha de Tratamento , Resultado do Tratamento
11.
Support Care Cancer ; 11(9): 611-4, 2003 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12883966

RESUMO

Patients with advanced cancer experience various problems with eating, and their meals should be tailored to meet their specific needs. Two methods of food service were compared in a shared acute oncology/palliative care unit; an electrical food cart allowing patients to select their food types and portions at the bedside, and a traditional food tray delivery service that relied on meals being prepared in a centralized kitchen and then delivered by tray. Over a 10-day period, lunch meals were delivered by food cart and supper meals via food trays. Twenty-seven out of 32 patients participated in the trial. Patients significantly preferred the food cart to the trays with respect to the timing and appeal of the meal, appropriateness of food types and food portions and the variety of the food choices. A food cart as used in this trial provides a more flexible and appropriate method of food delivery to in-patients in the oncology and palliative unit. Further studies should examine whether this translates to improved caloric intake and quality of life parameters.


Assuntos
Serviço Hospitalar de Nutrição/organização & administração , Planejamento de Cardápio/métodos , Neoplasias/enfermagem , Cuidados Paliativos , Satisfação do Paciente/estatística & dados numéricos , Canadá , Humanos
12.
Pharmacol Biochem Behav ; 73(2): 411-8, 2002 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12117596

RESUMO

In the present study, we examined the effects of intrathecal pretreatment (twice daily injections on postoperative (PO) days 0-3 with the selective Group I (mGluR1a) mGluR antagonist, (RS)-1-aminoindan-1,5-dicarboxylic acid ((RS)-AIDA), the selective Group I (mGluR5a) antagonist, 2-methyl-6-(phenylethynyl)-pyridine (MPEP), the selective Group II mGluR agonist, (2R,4R)-4-aminopyrrolidine-2,4-dicarboxylate ((2R,4R)-APDC) or the selective Group III mGluR agonist, L-2-amino-4-phosphonobutyrate (L-AP4), on mechanical and cold hypersensitivity associated with chronic constriction injury (CCI) of the sciatic nerve in rats. Mechanical and cold sensitivity was assessed prior to surgery (baseline) and then at 4, 8 and 12 days following CCI. Pretreatment with all of the mGluR agents produced reductions in the development of mechanical hypersensitivity. In addition, all the mGluR agents, except MPEP, were effective in reducing the development of cold hypersensitivity. This study demonstrates that spinal Group I mGluR antagonism, and Group II or III mGluR agonism, can effectively decrease the development of mechanical and cold hypersensitivity associated with CCI in rats. In addition, the results can be interpreted to suggest that activation of spinal Group I mGluRs contributes to spinal plasticity leading to the development of neuropathic pain, and that this effect is offset by activation of groups II and III mGluRs.


Assuntos
Analgésicos/farmacologia , Dor/tratamento farmacológico , Doenças do Sistema Nervoso Periférico/complicações , Receptores de Glutamato Metabotrópico/agonistas , Receptores de Glutamato Metabotrópico/antagonistas & inibidores , Analgésicos/administração & dosagem , Animais , Constrição Patológica/complicações , Constrição Patológica/patologia , Antagonistas de Aminoácidos Excitatórios/farmacologia , Indanos/farmacologia , Injeções Espinhais , Masculino , Dor/etiologia , Medição da Dor/efeitos dos fármacos , Limiar da Dor/efeitos dos fármacos , Doenças do Sistema Nervoso Periférico/patologia , Ratos , Ratos Long-Evans
13.
J Speech Lang Hear Res ; 45(2): 268-81, 2002 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-12003510

RESUMO

Four vocally untrained healthy adults, 2 men and 2 women, completed the study. A double-blind placebo-controlled approach was used to administer three treatments to each participant on separate days. Drugs treatments involved a single 60-mg dose of a diuretic, Lasix (LA), on one day, and a single 50-mg dose of an oral antihistamine, diphenhydramine hydrochloride (DH), on another day. A third day involved the administration of a placebo, sugar pills (SP). Critical posttreatment measures were weight (kg), which estimated systemic dehydration, saliva viscosity (centipoise), which estimated secretion dehydration, and phonation threshold pressure (PTP, in cm H2O), at high pitches, which indicated pulmonary drive for phonation. The central experimental question was: Does systemic dehydration, or secretory dehydration, or both, mediate increases in PTP that are known to occur following dehydration treatments? The results showed that LA induced systemic dehydration, as shown by a decrease in total body mass of about 1%. Weight losses were seen during a 1- to 4-hour block following drug administration and persisted for at least 8 hours thereafter. PTPs also increased in that condition, about 23% relative to baseline, but only several hours after whole-body dehydration was initially seen (5-12 hours after drug administration). In contrast, no evidence was seen that DH accomplished either secretory dehydration or PTP shifts. The results indicate that systemic dehydration can mediate PTP increases. The influence of secretory dehydration on PTP is unclear.


Assuntos
Desidratação/complicações , Glote/fisiopatologia , Distúrbios da Voz/etiologia , Distúrbios da Voz/fisiopatologia , Adulto , Biologia/métodos , Estudos Cross-Over , Desidratação/induzido quimicamente , Difenidramina/efeitos adversos , Diuréticos/efeitos adversos , Método Duplo-Cego , Feminino , Furosemida/efeitos adversos , Antagonistas dos Receptores Histamínicos H1/efeitos adversos , Humanos , Mucosa Laríngea/fisiopatologia , Masculino , Saliva/fisiologia , Índice de Gravidade de Doença , Viscosidade , Distúrbios da Voz/diagnóstico
14.
Pain ; 94(1): 17-29, 2001 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-11576741

RESUMO

Coincident with nociception, both noxious chemical stimulation of the hind paw and chronic constriction injury (CCI) of the sciatic nerve produce an increase in protein kinase C (PKC) translocation in the spinal cord of rats. Noxious stimulus-induced PKC translocation likely depends on glutamate activity at either N-methyl-D-aspartate (NMDA) receptors or group I metabotropic glutamate receptors (mGluR1/5) in the spinal cord dorsal horn. This study compares nociceptive responses to, and the alterations in membrane-associated PKC, induced by noxious chemical stimulation of the hindpaw and CCI of the sciatic nerve, as well as their modulation by both NMDA and mGluR1/5 receptor antagonists. Three groups of rats were given a single intrathecal (i.t.) injection of either vehicle, dizocilpine maleate (MK-801, 60 nmol), an NMDA receptor antagonist, or (S)-4-carboxyphenylglycine (S)-4CPG, (150 nmol), an mGluR1/5 antagonist, 10 min prior to a 50 microl of 2.5% formalin injection into the ventral surface of one hind paw. Another three groups of rats were given twice daily injections of either vehicle, MK-801 (30 nmol) or (S)-4CPG (90 nmol) i.t. for 5 days starting 30 min before CCI or sham injury of the sciatic nerve. Nociceptive responses were assessed for a 60 min period after the formalin injection in the first three groups, and tests of mechanical and cold allodynia were performed on days 4, 8, 12 and 16 after CCI for the latter three groups. Furthermore, changes in the levels of membrane-associated PKC, as assayed by quantitative autoradiography of the specific binding of [3H]-phorbol 12,13-dibutyrate ([3H]-PDBu) in the dorsal horn of the lumbar spinal cord sections, were assessed in formalin-injected rats (at 5, 25 and 60 min) and in neuropathic rats 5 days after CCI, treated (as above) with vehicle, MK-801 or (S)-4CPG. The results indicate that i.t. treatment with MK-801 significantly reduced nociceptive scores in the formalin test and also produced a significant suppression of formalin-induced increases in [3H]-PDBu binding in laminae I-II, III-VI and X of the lumbar spinal cord. In contrast, i.t. treatment with (S)-4CPG failed to significantly affect either nociceptive behaviours in the formalin test or formalin-induced increases in [3H]-PDBu binding in laminae I-II and III-VI of the lumbar spinal cord. On the other hand, i.t. treatment with either MK-801 or (S)-4CPG produced a significant reduction in mechanical and cold hypersensitivity, as well as [3H]-PDBu binding in laminae I-II and III-VI of the lumbar spinal cord, after CCI. These results suggest that while NMDA, but not mGluR1/5, receptors are involved in translocation of PKC and nociception in a model of persistent acute pain, both types of receptors influence the translocation of PKC in dorsal horn and mechanical and cold allodynia in a model of chronic neuropathic pain.


Assuntos
Antagonistas de Aminoácidos Excitatórios/farmacologia , Medição da Dor/efeitos dos fármacos , Dor/enzimologia , Proteína Quinase C/metabolismo , Receptores de Glutamato Metabotrópico/antagonistas & inibidores , Receptores de N-Metil-D-Aspartato/antagonistas & inibidores , Medula Espinal/efeitos dos fármacos , Animais , Masculino , Transporte Proteico/efeitos dos fármacos , Ratos , Ratos Long-Evans , Receptores de Glutamato Metabotrópico/metabolismo , Receptores de N-Metil-D-Aspartato/metabolismo , Medula Espinal/enzimologia
15.
Pain ; 77(1): 59-66, 1998 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-9755019

RESUMO

The present study examined the effects of intrathecal (i.t.) treatment (twice-daily injections on post-operative (PO) days 0-8) with the metabotropic glutamate receptor (mGluR) compound, (S)-4-carboxyphenylglycine ((S)-4CPG), or the non-competitive N-methyl-D-aspartate (NMDA) antagonist, dizocilipine maleate (MK-801), on mechanical allodynia and cold hyperalgesia associated with chronic constriction injury (CCI) of the sciatic nerve in rats. Also, the effects of early (twice-daily injections on days 0-3) or late (twice-daily injections on days 8-11) (S)-4CPG treatment on the injury-related mechanical allodynia and cold hyperalgesia were assessed in CCI rats. Results demonstrated that 8-day (S)-4CPG or MK-801 treatment attenuated mechanical allodynia (up to PO days 12 or 16, respectively) and cold hyperalgesia (up to PO days 8 or 16, respectively). Results also demonstrated that early (S)-4CPG treatment significantly attenuated the development of mechanical allodynia (90 and 270 nmol) and cold hyperalgesia (270 nmol). However, late treatment with (S)-4CPG did not reduce the nociceptive behaviours in either behavioural task. These data not only confirm that the NMDA receptor plays a role in chronic nociception, but also suggest that Group I mGluRs are more critically involved in the development, and not the maintenance, of mechanical allodynia and cold hyperalgesia associated with CCI in rats.


Assuntos
Benzoatos/farmacologia , Antagonistas de Aminoácidos Excitatórios/farmacologia , Glicina/análogos & derivados , Hiperalgesia/fisiopatologia , Síndromes de Compressão Nervosa/fisiopatologia , Nervo Isquiático/efeitos dos fármacos , Animais , Temperatura Baixa , Maleato de Dizocilpina/farmacologia , Glicina/farmacologia , Injeções Espinhais , Masculino , Estimulação Física , Ratos , Ratos Endogâmicos , Fatores de Tempo
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