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1.
BMC Geriatr ; 18(1): 220, 2018 09 20.
Artigo em Inglês | MEDLINE | ID: mdl-30236063

RESUMO

In aging societies, the last phase of people's lives changes profoundly, challenging traditional care provision in geriatric medicine and palliative care. Both specialties have to collaborate closely and geriatric palliative care (GPC) should be conceptualized as an interdisciplinary field of care and research based on the synergies of the two and an ethics of care.Major challenges characterizing the emerging field of GPC concern (1) the development of methodologically creative and ethically sound research to promote evidence-based care and teaching; (2) the promotion of responsible care and treatment decision making in the face of multiple complicating factors related to decisional capacity, communication and behavioural problems, extended disease trajectories and complex social contexts; (3) the implementation of coordinated, continuous care despite the increasing fragmentation, sectorization and specialization in health care.Exemplary strategies to address these challenges are presented: (1) GPC research could be enhanced by specific funding programs, specific patient registries and anticipatory consent procedures; (2) treatment decision making can be significantly improved using advance care planning programs that include adequate decision aids, including those that address proxies of patient who have lost decisional capacity; (3) care coordination and continuity require multiple approaches, such as care transition programs, electronic solutions, and professionals who act as key integrators.


Assuntos
Tomada de Decisão Clínica/métodos , Geriatria/métodos , Cuidados Paliativos/métodos , Planejamento Antecipado de Cuidados/tendências , Idoso , Atenção à Saúde/métodos , Atenção à Saúde/tendências , Geriatria/tendências , Humanos , Cuidados Paliativos/tendências
2.
Eur J Neurol ; 23(1): 30-8, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26423203

RESUMO

BACKGROUND AND PURPOSE: The European Association of Palliative Care Taskforce, in collaboration with the Scientific Panel on Palliative Care in Neurology of the European Federation of Neurological Societies (now the European Academy of Neurology), aimed to undertake a review of the literature to establish an evidence-based consensus for palliative and end of life care for patients with progressive neurological disease, and their families. METHODS: A search of the literature yielded 942 articles on this area. These were reviewed by two investigators to determine the main areas and the subsections. A draft list of papers supporting the evidence for each area was circulated to the other authors in an iterative process leading to the agreed recommendations. RESULTS: Overall there is limited evidence to support the recommendations but there is increasing evidence that palliative care and a multidisciplinary approach to care do lead to improved symptoms (Level B) and quality of life of patients and their families (Level C). The main areas in which consensus was found and recommendations could be made are in the early integration of palliative care (Level C), involvement of the wider multidisciplinary team (Level B), communication with patients and families including advance care planning (Level C), symptom management (Level B), end of life care (Level C), carer support and training (Level C), and education for all professionals involved in the care of these patients and families (Good Practice Point). CONCLUSIONS: The care of patients with progressive neurological disease and their families continues to improve and develop. There is a pressing need for increased collaboration between neurology and palliative care.


Assuntos
Consenso , Esclerose Múltipla/terapia , Doenças Neurodegenerativas/terapia , Neurologia/normas , Cuidados Paliativos/normas , Sociedades Médicas/normas , Assistência Terminal/normas , Humanos , Doenças do Sistema Nervoso
3.
BMC Med Educ ; 15: 213, 2015 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-26614121

RESUMO

BACKGROUND: In 2007, a first survey on undergraduate palliative care teaching in Switzerland has revealed major heterogeneity of palliative care content, allocation of hours and distribution throughout the 6 year curriculum in Swiss medical faculties. This second survey in 2012/13 has been initiated as part of the current Swiss national strategy in palliative care (2010 - 2015) to serve as a longitudinal monitoring instrument and as a basis for redefinition of palliative care learning objectives and curriculum planning in our country. METHODS: As in 2007, a questionnaire was sent to the deans of all five medical faculties in Switzerland in 2012. It consisted of eight sections: basic background information, current content and hours in dedicated palliative care blocks, current palliative care content in other courses, topics related to palliative care presented in other courses, recent attempts at improving palliative care content, palliative care content in examinations, challenges, and overall summary. Content analysis was performed and the results matched with recommendations from the EAPC for undergraduate training in palliative medicine as well as with recommendations from overseas countries. RESULTS: There is a considerable increase in palliative care content, academic teaching staff and hours in all medical faculties compared to 2007. No Swiss medical faculty reaches the range of 40 h dedicated specifically to palliative care as recommended by the EAPC. Topics, teaching methods, distribution throughout different years and compulsory attendance still differ widely. Based on these results, the official Swiss Catalogue of Learning Objectives (SCLO) was complemented with 12 new learning objectives for palliative and end of life care (2013), and a national basic script for palliative care was published (2015). CONCLUSION: Performing periodic surveys of palliative care teaching at national medical faculties has proven to be a useful tool to adapt the national teaching framework and to improve the recognition of palliative medicine as an integral part of medical training.


Assuntos
Competência Clínica , Educação de Graduação em Medicina/métodos , Medicina Paliativa/educação , Inquéritos e Questionários , Estudos Transversais , Currículo/normas , Avaliação Educacional , Docentes de Medicina/organização & administração , Feminino , Humanos , Masculino , Cuidados Paliativos/normas , Cuidados Paliativos/tendências , Melhoria de Qualidade , Faculdades de Medicina/organização & administração , Estudantes de Medicina/estatística & dados numéricos , Suíça , Adulto Jovem
4.
Palliat Support Care ; 12(5): 345-50, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23768798

RESUMO

OBJECTIVE: Palliative sedation is a last resort medical act aimed at relieving intolerable suffering induced by intractable symptoms in patients at the end-of-life. This act is generally accepted as being medically indicated under certain circumstances. A controversy remains in the literature as to its ethical validity. There is a certain vagueness in the literature regarding the legitimacy of palliative sedation in cases of non-physical refractory symptoms, especially "existential suffering." This pilot study aims to measure the influence of two independent variables (short/long prognosis and physical/existential suffering) on the physicians' attitudes toward palliative sedation (dependent variable). METHODS: We used a 2 × 2 experimental design as described by Blondeau et al. Four clinical vignettes were developed (vignette 1: short prognosis/existential suffering; vignette 2: long prognosis/existential suffering; vignette 3: short prognosis/physical suffering; vignette 4: long prognosis/physical suffering). Each vignette presented a terminally ill patient with a summary description of his physical and psychological condition, medication, and family situation. The respondents' attitude towards sedation was assessed with a six-point Likert scale. A total of 240 vignettes were sent to selected Swiss physicians. RESULTS: 74 vignettes were completed (36%). The means scores for attitudes were 2.62 ± 2.06 (v1), 1.88 ± 1.54 (v2), 4.54 ± 1.67 (v3), and 4.75 ± 1.71 (v4). General linear model analyses indicated that only the type of suffering had a significant impact on the attitude towards sedation (F = 33.92, df = 1, p = 0.000). Significance of the results: The French Swiss physicians' attitude toward palliative sedation is more favorable in case of physical suffering than in existential suffering. These results are in line with those found in the study of Blondeau et al. with Canadian physicians and will be discussed in light of the arguments given by physicians to explain their decisions.


Assuntos
Atitude do Pessoal de Saúde , Sedação Profunda/ética , Hipnóticos e Sedativos/uso terapêutico , Dor Intratável/tratamento farmacológico , Cuidados Paliativos/ética , Estresse Psicológico/tratamento farmacológico , Assistência Terminal/ética , Adulto , Tomada de Decisões/ética , Sedação Profunda/métodos , Sedação Profunda/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dor Intratável/psicologia , Cuidados Paliativos/métodos , Cuidados Paliativos/psicologia , Projetos Piloto , Prognóstico , Estresse Psicológico/psicologia , Suíça , Assistência Terminal/métodos , Assistência Terminal/psicologia , Fatores de Tempo
5.
Palliat Med Rep ; 5(1): 350-358, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39144135

RESUMO

Background: Identifying patients who require palliative care is a major public health concern. ID-PALL is the first screening instrument developed and validated to differentiate between patients in need of general versus specialized palliative care. Objectives: This study aimed to (1) evaluate user satisfaction and the facilitators and barriers for ID-PALL use and (2) assess the prevalence of patients who require palliative care. Design: A mixed methods study with an explanatory sequential design. Setting/Subjects: Over a six-month period, patients admitted to two internal medicine wards of a Swiss tertiary hospital were screened by nurses and physicians with ID-PALL, two to three days after hospitalization. Nurses and physicians completed a questionnaire and participated in focus groups. Results: Out of 969 patients, ID-PALL was completed for 420 (43.3%). Sixty percent of patients assessed needed general palliative care and 26.7% specialized palliative care. From the questionnaire and focus groups, five subthemes were identified concerning facilitators and barriers: organization, knowledge, collaboration, meaning, and characteristics of the instrument. ID-PALL was recognized as an easy-to-use and helpful instrument that facilitates discussion between health care professionals about palliative care. The difficulties in using ID-PALL in nurse-physician collaboration and the paucity of referrals to the palliative care team were highlighted. Conclusions: ID-PALL helped to identify a very high prevalence of palliative care needs among internal medicine patients in a tertiary hospital setting. Although regarded as helpful and easy to use, challenges remain concerning interprofessional implementation and inclusion of palliative care specialists, which may be met by automatic referrals in case of specialist needs.

6.
Psychooncology ; 22(9): 2079-86, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23532835

RESUMO

BACKGROUND: Existential behavioural therapy (EBT) was developed to support informal caregivers of palliative patients in the last stage of life and during bereavement as a manualised group psychotherapy comprising six sessions. We tested the effectiveness of EBT on mental stress and quality of life (QOL). METHODS: Informal caregivers were randomly assigned (1:1) to EBT or a treatment-as-usual control group using computer-generated numbers in blocks of 10. Primary outcomes were assessed with the Brief Symptom Inventory (subscales somatisation, anxiety and depression), the Satisfaction with Life Scale (SWLS), the WHOQOL-BREF and a numeric rating scale for QOL (QOL-NRS, range 0-10). Data were collected at baseline, pre-treatment, post-treatment and follow-ups after 3 and 12 months. Treatment effects were assessed with a multivariate analysis of covariance. RESULTS: Out of 160 relatives, 81 were assigned to EBT and 79 to the control group. Participants were 54.5 ± 13.2 years old; 69.9% were female. The multivariate model was significant for the pre-/post-comparison (p=0.005) and the pre-/12-month comparison (p=0.05) but not for the pre-/3-month comparison. Medium to large effects on anxiety and QOL (SWLS, WHOQOL-BREF, QOL-NRS) were found at post-treatment; medium effects on depression and QOL (QOL-NRS) emerged in the 12-month follow-up. No adverse effects of the intervention were observed. CONCLUSION: Existential behavioural therapy appears to exert beneficial effects on distress and QOL of informal caregivers of palliative patients. Further longitudinal evidence is needed to confirm these findings.


Assuntos
Terapia Comportamental/métodos , Cuidadores/psicologia , Existencialismo/psicologia , Neoplasias/enfermagem , Cuidados Paliativos/psicologia , Psicoterapia de Grupo/métodos , Estresse Psicológico/prevenção & controle , Adulto , Idoso , Ansiedade/prevenção & controle , Ansiedade/terapia , Luto , Depressão/prevenção & controle , Depressão/terapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Atenção Plena/métodos , Qualidade de Vida , Estresse Psicológico/terapia , Resultado do Tratamento
7.
MMW Fortschr Med ; 153 Suppl 2: 41-6, 2011 Jul 21.
Artigo em Alemão | MEDLINE | ID: mdl-23964467

RESUMO

PROJECT DESCRIPTION: The Palliative Home Care Team of the InterdisciplinaryCenterfor Palliative Medicine at Munich University Hospital has been providing Specialized Home Palliative Care (German abbreviation: SAPV) according to the new German regulations since October 2009. RESULTS: Out of 267 requests, 178 patients were accepted for SAPV, 33 thereof at the level of care coordination and 140 as partial or total home palliative care including 24-h, 7/7 on-call duty. Of the latter group, 90 died at home, 19 in a palliative care unit or hospice and one on a hospital ward.The place of death corresponded to the patients' wishes in 98% of cases. Altogether, emergency medical services other than the SAPV team were called upon in 7 cases, and 12 patients were admitted to a general hospital ward. More than a quarter of our patients had non-oncological diagnoses.The proportion of work dealing with family members (21%) was higher than the patient-related one (19%). The highest percentage (37%) represented office work. CONCLUSIONS: The requirement for SAPV in the urban setting is high, in spite of the intensive primary care, with an increasing proportion of non-oncological patients. A key aspect concerns the work with family members. SAPV can minimize the number of hospital admissions and emergency calls. The patient's wishes concerning the place of death can be fulfilled. Feed-back from patients and family members indicates that SAPV makes an important contribution towards removing the taboo associated with death and dying.


Assuntos
Assistência Ambulatorial/organização & administração , Serviços de Assistência Domiciliar/organização & administração , Programas Nacionais de Saúde , Cuidados Paliativos/organização & administração , Equipe de Assistência ao Paciente/organização & administração , Saúde da População Urbana , Idoso , Cuidadores , Comportamento do Consumidor , Efeitos Psicossociais da Doença , Feminino , Alemanha , Acessibilidade aos Serviços de Saúde/organização & administração , Necessidades e Demandas de Serviços de Saúde/organização & administração , Humanos , Masculino , Admissão do Paciente , Preferência do Paciente , Encaminhamento e Consulta/organização & administração
8.
J Med Ethics ; 36(12): 779-83, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21112938

RESUMO

This article presents the new German law on advance directives from 1 September 2009. The history of the parliamentary process of this law is described, the present regulations are explained, their relevance for medical practice discussed and shortcomings are identified. Finally, the new law is compared with other regulations in the international context. Previously established legal practice in Germany has now become largely confirmed by the new law: An advanced directive must be respected in any decision concerning medical treatment, regardless of the stage of the illness. It can be informally revoked at any time, even with limited decision-making capacity. Nobody may be obliged to issue a directive in any way. Advance directives do not need notarisation or routine updating after certain time intervals. Provided that the patient, who is no longer mentally competent, has issued a lasting power of attorney (Bevollmächtiger), or provided that the patient has been appointed a healthcare proxy by the courts (Betreuer), this authorized surrogate must assert the patient's will. The role of the guardianship court is clarified: it only needs to be involved in cases of disagreement as to the patient's will. The new German law thus combines more legal certainty with a liberal emphasis on patient autonomy and flexible, adaptable regulations.


Assuntos
Diretivas Antecipadas/legislação & jurisprudência , Direitos do Paciente/legislação & jurisprudência , Assistência Terminal/legislação & jurisprudência , Adolescente , Criança , Tomada de Decisões , Alemanha , Humanos , Menores de Idade/legislação & jurisprudência , Autonomia Pessoal
9.
Fortschr Neurol Psychiatr ; 78(4): 203-12, 2010 Apr.
Artigo em Alemão | MEDLINE | ID: mdl-20195948

RESUMO

A third of the elderly population dies with dementia. This poses major and partly unmet needs on relatives, professional carers and medical specialists. Our review summarizes epidemiological risk factors for the increased mortality in demented patients (age, somatic co-morbidity, neuropsychiatric symptoms), current practice (place of death, decision making, complications, medical treatment, course of dying, cause of death, suicide, bereaved relatives), and instruments for the assessment of pain, burden, prognosis and treatment planning in the terminal stage of illness. We describe the current legal situation in Germany and present a brief outline of practical management issues. We also list a number of areas offering leeway for improvement regarding research, training, psycho-education, preparation, diagnosis, treatment and support.


Assuntos
Demência/terapia , Cuidados Paliativos , Idoso , Tomada de Decisões , Demência/diagnóstico , Demência/epidemiologia , Alemanha/epidemiologia , Humanos , Testes Neuropsicológicos , Prognóstico , Suicídio/estatística & dados numéricos
11.
J Cell Biol ; 121(3): 665-72, 1993 May.
Artigo em Inglês | MEDLINE | ID: mdl-8486743

RESUMO

Little is known about the signal transduction mechanisms involved in the response to neurotrophins and other neurotrophic factors in neurons, beyond the activation of the tyrosine kinase activity of the neurotrophin receptors belonging to the trk family. We have previously shown that the introduction of the oncogene product ras p21 into the cytoplasm of chick embryonic neurons can reproduce the survival and neurite-outgrowth promoting effects of the neurotrophins nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF), and of ciliary neurotrophic factor (CNTF). To assess the potential signal-transducing role of endogenous ras p21, we introduced function-blocking anti-ras antibodies or their Fab fragments into cultured chick embryonic neurons. The BDNF-induced neurite outgrowth in E12 nodose ganglion neurons was reduced to below control levels, and the NGF-induced survival of E9 dorsal root ganglion (DRG) neurons was inhibited in a specific and dose-dependent fashion. Both effects could be reversed by saturating the epitope-binding sites with biologically inactive ras p21 before microinjection. Surprisingly, ras p21 did not promote the survival of NGF-dependent E12 chick sympathetic neurons, and the NGF-induced survival in these cells was not inhibited by the Fab-fragments. The survival effect of CNTF on ras-responsive ciliary neurons could not be blocked by anti-ras Fab fragments. These results indicate an involvement of ras p21 in the signal transduction of neurotrophic factors in sensory, but not sympathetic or ciliary neurons, pointing to the existence of different signaling pathways not only in CNTF-responsive, but also in neurotrophin-responsive neuronal populations.


Assuntos
Gânglios Simpáticos/fisiologia , Fatores de Crescimento Neural/fisiologia , Neurônios Aferentes/fisiologia , Gânglio Nodoso/fisiologia , Proteína Oncogênica p21(ras)/fisiologia , Animais , Anticorpos Monoclonais/farmacologia , Fator Neurotrófico Derivado do Encéfalo , Células Cultivadas/efeitos dos fármacos , Embrião de Galinha , Fator Neurotrófico Ciliar , Fatores de Crescimento Neural/antagonistas & inibidores , Proteínas do Tecido Nervoso/antagonistas & inibidores , Ratos , Transdução de Sinais/efeitos dos fármacos
12.
Neuron ; 2(1): 1087-96, 1989 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-2696501

RESUMO

Although evidence obtained with the PC12 cell line has suggested a role for the ras oncogene proteins in the signal transduction of nerve growth factor-mediated fiber outgrowth, little is known about the signal transduction mechanisms involved in the neuronal response to neurotrophic factors in nontransformed cells. We report here that the oncogene protein T24-ras, when introduced into the cytoplasm of freshly dissociated chick embryonic neurons, promotes the in vitro survival and neurite outgrowth of nerve growth factor-responsive dorsal root ganglion neurons, brain-derived neurotrophic factor-responsive nodose ganglion neurons, and ciliary neuronotrophic factor-responsive ciliary ganglion neurons. The proto-oncogene product c-Ha-ras also promotes neuronal survival, albeit less strongly. No effect could be observed with truncated counterparts of T24-ras and c-Ha-ras lacking the 23 C-terminal amino acids including the membrane-anchoring, palmityl-accepting cysteine. These results suggest a generalized involvement of ras or ras-like proteins in the intracellular signal transduction pathway for neurotrophic factors.


Assuntos
Axônios/ultraestrutura , Gânglios Parassimpáticos/citologia , Gânglios Espinais/citologia , Neurônios/citologia , Gânglio Nodoso/citologia , Proteína Oncogênica p21(ras)/fisiologia , Nervo Vago/citologia , Neoplasias das Glândulas Suprarrenais , Animais , Axônios/fisiologia , Linhagem Celular , Sobrevivência Celular , Células Cultivadas , Embrião de Galinha , Genes ras , Neurônios/fisiologia , Proteína Oncogênica p21(ras)/genética , Feocromocitoma
13.
Lancet ; 369(9578): 2031-2041, 2007 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-17574095

RESUMO

Amyotrophic lateral sclerosis (known in the UK as motor neuron disease) is a devastating illness with uncertain pathogenesis. In this Seminar, we review its natural history, clinical features, diagnostic criteria, variant and mimic syndromes, genetic forms, and epidemiology. Several hypotheses about causes of the disorder are discussed, such as excitotoxicity and oxidant stress, and we review past and present putative disease-modifying treatments. Disease-management strategies, from telling the patient about their illness to end-of-life decisions and palliative care, are presented. We review options for control of the main symptoms of amyotrophic lateral sclerosis--including dysphagia, dysarthria, respiratory distress, pain, and psychological disorders--and care in the terminal phase. The need for good psychosocial and spiritual care of patients and families is emphasised. We conclude with an overview of some current major issues and future prospects, ranging from the search for disease markers to challenging developments such as stem-cell and gene therapy.


Assuntos
Esclerose Lateral Amiotrófica , Fatores de Crescimento Neural/uso terapêutico , Cuidados Paliativos , Superóxido Dismutase/genética , Esclerose Lateral Amiotrófica/diagnóstico , Esclerose Lateral Amiotrófica/fisiopatologia , Esclerose Lateral Amiotrófica/terapia , Feminino , Humanos , Masculino , Ensaios Clínicos Controlados Aleatórios como Assunto , Superóxido Dismutase-1
14.
Cochrane Database Syst Rev ; (4): CD002064, 2007 Oct 17.
Artigo em Inglês | MEDLINE | ID: mdl-17943766

RESUMO

BACKGROUND: Trophic factors, including recombinant human insulin-like growth factor I (rhIGF-I) are possible disease modifying therapies for amyotrophic lateral sclerosis. OBJECTIVES: To examine the efficacy of recombinant human insulin-like growth factor I in amyotrophic lateral sclerosis. SEARCH STRATEGY: We searched the Cochrane Neuromuscular Disease Group Trials Register (March 2006), MEDLINE (January 1966 to March 2006) and EMBASE (January 1980 to March 2006) and asked the authors of randomised clinical trials and manufacturers of recombinant human insulin-like growth factor I. SELECTION CRITERIA: We considered all randomised controlled clinical trials involving rhIGF-I treatment of amyotrophic lateral sclerosis in adults with a clinical diagnosis of definite or probable amyotrophic lateral sclerosis according to the El Escorial Criteria. The primary outcome measure was change in Appel Amyotrophic Lateral Sclerosis Rating Scale (AALSRS) total score after nine months treatment and secondary outcome measures were change in AALSRS at 1, 2, 3, 4, 5, 6, 7, 8, 9 months, change in quality of life (Sickness Impact Profile scale), survival and adverse events. DATA COLLECTION AND ANALYSIS: We identified three randomised clinical trials. Only two were included in the analysis. Each author graded the studies for methodological quality. Data were extracted and entered by the lead author and checked by the other two. Some missing data had to be regenerated by calculations based on ruler measurements of data presented in published graphs. MAIN RESULTS: In a European trial with 59 participants on placebo and 124 on rhIGF-I, 0.1 mg/kg/day the mean difference (MD) in change in AALSRS total score after nine months was -3.30 (95% confidence interval (CI) -8.68 to 2.08), non-significantly less in the treated than the placebo group. In a North American trial, in which 90 participants on placebo were compared with 89 on recombinant human insulin-like growth factor I 0.05 mg/kg/day, and 87 participants on 0.1 mg/kg/day, the MD after nine months was -6.00 (95%CI -10.99 to -1.01), significantly less on treatment. The combined analysis from both randomised clinical trials showed a weighted mean difference after nine months of -4.75 (95% CI -8.41 to -1.09), a significant difference in favour of the treated group. The secondary outcome measures showed non-significant trends favouring rhIGF-I. Similarly the data with the 0.05 mg/kg/day dose showed trends favouring rhIGF-I at all time points but did not reach significance at the five per cent level at any point. There was an increased risk of injection site reactions with rhIGF-I (relative risk 2.53, 95% CI 1.40 to 4.59). AUTHORS' CONCLUSIONS: The available randomised placebo controlled trials do not permit a definitive assessment of the clinical efficacy of rhIGF-I on ALS. More research is needed and one trial is in progress. Future trials should include survival as an outcome measure.


Assuntos
Esclerose Lateral Amiotrófica/tratamento farmacológico , Fator de Crescimento Insulin-Like I/uso terapêutico , Humanos , Masculino , Ensaios Clínicos Controlados Aleatórios como Assunto , Proteínas Recombinantes/uso terapêutico
15.
Neuroscience ; 141(4): 1879-86, 2006 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-16820266

RESUMO

Conflicting results have been reported concerning the toxicity of cerebrospinal fluid from patients with amyotrophic lateral sclerosis (ALS-CSF) when added to neuronal cultures. The possible toxic factor(s) and the exact mode of action (e.g. requirement of glial cells) have not been identified so far. Glutamate is a potential candidate for this toxic effect, since antagonists of ionotropic glutamate receptors have been shown to attenuate ALS-CSF toxicity. We studied the effects of ALS-CSF on mixed and motoneuron-enriched chick embryonic spinal cord cultures. We found a toxic action of ALS-CSF in both culture types which could not be attenuated by 5 kDa-filtration or 15 min 90 degrees C heating. Nevertheless, the metabotropic glutamate receptor (mGluR) group I antagonist 1-aminoindan-1,5-dicarboxylic acid, but also the group I agonist (s)-3,5-dihydroxyphenylglycine (DHPG) exerted protective effects against ALS-CSF toxicity. In this experimental setting, DHPG may functionally act via a receptor blockade due to sustained activation. No protective effect was seen with the mGluR group III inhibitor (RS)-alpha-cyclopropyl-4-phosphonophenylglycine (CPPG). Addition of DHPG did not increase the protective action of the AMPA inhibitor 6-chloro-4-hydroxyquinoline-2-carboxylic acid (6-CKU). Addition of l-glutamate did not mimic these toxic ALS-CSF effects in motoneuron-enriched cultures. Our experiments demonstrate that ALS-CSF toxicity is mediated by a small heat-resistant molecule which may act directly on neurons. Since blockade of group I mGluRs exerts a protective effect, the possibility of targeting these mGluRs pharmacologically in motoneuron disease should be kept in mind.


Assuntos
Esclerose Lateral Amiotrófica/líquido cefalorraquidiano , Líquido Cefalorraquidiano/efeitos dos fármacos , Antagonistas de Aminoácidos Excitatórios/farmacologia , Neurônios Motores/metabolismo , Receptores de Glutamato Metabotrópico/antagonistas & inibidores , Idoso , Animais , Contagem de Células/métodos , Morte Celular/efeitos dos fármacos , Morte Celular/fisiologia , Células Cultivadas , Líquido Cefalorraquidiano/química , Líquido Cefalorraquidiano/metabolismo , Embrião de Galinha , Técnicas de Cocultura/métodos , Relação Dose-Resposta a Droga , Feminino , Ácido Glutâmico/farmacologia , Glicina/análogos & derivados , Glicina/farmacologia , Humanos , Imuno-Histoquímica/métodos , Marcação In Situ das Extremidades Cortadas , Indanos/farmacologia , Indóis , Lectinas , Masculino , Pessoa de Meia-Idade , Neurônios Motores/efeitos dos fármacos , Receptores de Glutamato Metabotrópico/fisiologia , Medula Espinal/citologia , Fatores de Tempo
16.
J Mol Biol ; 188(1): 15-22, 1986 Mar 05.
Artigo em Inglês | MEDLINE | ID: mdl-3519981

RESUMO

Anticodon loop cleavages of two host tRNA species occur in bacteriophage T4-infected Escherichia coli CTr5X, a host strain restricting phage mutants deficient in polynucleotide kinase (pnk) or RNA ligase (rli). The cleavage products accumulate with the mutants but are further processed in wt infection through polynucleotide kinase and RNA ligase reactions. Inactivating mutations in stp suppress pnk- or rli- mutations in E. coli CTr5X and, as shown here, also abolish the anticodon nuclease, implicating the stp product with this activity. We show also that there exist other suppressing mutations of a pnk- (pseT2) mutation that appear not to affect the anticodon nuclease and are not in stp. It has been shown that a single locus in E. coli CTr5X, termed prr, determines the restriction of pnk- or rli- mutants. A transductant carrying prr featured upon infection the anticodon nuclease reaction products, suggesting that prr determines the specific manifestation of this activity. However, prr does not encode the tRNA species that are vulnerable to the anticodon nuclease.


Assuntos
Anticódon/genética , Genes Virais , RNA de Transferência/genética , RNA Viral/genética , Fagos T/genética , Anticódon/metabolismo , Escherichia coli/genética , Cinética , Mutação , Hibridização de Ácido Nucleico , RNA de Transferência/metabolismo , Ribonucleases/metabolismo , Fagos T/metabolismo
17.
Neurology ; 53(8 Suppl 5): S37-9; discussion S40-2, 1999.
Artigo em Inglês | MEDLINE | ID: mdl-10560636

RESUMO

Informing patients and their families about a diagnosis such as amyotrophic lateral sclerosis (ALS) is a daunting task for any physician. The way the diagnosis is communicated will have a major impact on the physician-patient relationship and the attitude of the patient toward the disease and toward symptomatic treatment measures. Breaking the news can be truly defined as the starting point of palliative care in ALS. It is an ongoing information process which, by its nature, escapes narrow definitions or standardization attempts. Nevertheless, a number of techniques exist to facilitate the process and ease the burden for physicians, patients, and families. We believe that the terminal phase should be discussed at the latest when first respiratory symptoms appear, to prevent unwarranted fears of "choking to death."


Assuntos
Esclerose Lateral Amiotrófica/diagnóstico , Esclerose Lateral Amiotrófica/psicologia , Relações Médico-Paciente , Revelação da Verdade , Humanos
18.
Neurology ; 42(8): 1497-504, 1992 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-1641143

RESUMO

We performed a prospective study of the type, frequency, temporal profile, and prognostic role of cerebrovascular complications in 86 adults with bacterial meningitis. Cerebral angiography was performed in 27 patients (31.4%) who had focal deficits either clinically, on cranial CT, or both, and in patients who had persistent coma without explained cause despite 3 days of antibiotic therapy. Alterations of the vessel systems, including involvement of major arteries at the base of the brain, medium-sized arteries, small vessels, and major sinuses and cortical veins, were present in 13 of the 27 patients who had angiography. Typical cerebrovascular complications were arterial narrowing of the supraclinoid portion of the internal carotid artery; vessel wall irregularities, focal dilatations, and occlusions of distal branches of the middle cerebral artery; focal abnormal parenchymal blush; and thrombosis of the sagittal superior sinus and cortical veins. Prognosis for those patients with cerebrovascular complications was unfavorable. Six patients died, one remained in a vegetative state, four were moderately or slightly disabled, and only two recovered completely. The study showed that angiographically documented cerebrovascular complications are the most frequent intracranial complications in bacterial meningitis of the adult (37.1%) and are major determinants in the prognosis of this disease.


Assuntos
Transtornos Cerebrovasculares/etiologia , Meningites Bacterianas/complicações , Adulto , Idoso , Idoso de 80 Anos ou mais , Angiografia Cerebral , Líquido Cefalorraquidiano/microbiologia , Transtornos Cerebrovasculares/diagnóstico por imagem , Transtornos Cerebrovasculares/fisiopatologia , Avaliação da Deficiência , Feminino , Humanos , Masculino , Meningites Bacterianas/líquido cefalorraquidiano , Meningites Bacterianas/microbiologia , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Fatores de Tempo
19.
Neurology ; 51(2): 583-6, 1998 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-9710040

RESUMO

To test the safety and efficacy of recombinant human insulin-like growth factor-I (rhIGF-I) in ALS, 183 patients from eight European centers were randomized to receive double-blind placebo (n = 59) or rhIGF-I 0.1 mg/kg/day (n = 124) subcutaneously for 9 months. At study completion, the primary efficacy outcome measure (change in disease progression as assessed by the Appel ALS rating scale) showed no significant difference between treatment groups. RhIGF-I appeared to be safe and well-tolerated.


Assuntos
Esclerose Lateral Amiotrófica/tratamento farmacológico , Fator de Crescimento Insulin-Like I/uso terapêutico , Adulto , Método Duplo-Cego , Europa (Continente) , Humanos , Proteínas Recombinantes/uso terapêutico
20.
Neuromuscul Disord ; 7(2): 113-6, 1997 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-9131652

RESUMO

We report on an Austrian pedigree with autosomal dominant amyotrophic lateral sclerosis (ALS), diagnosed in six patients from two generations. The only surviving clinically affected family member was examined in our ALS clinic. Historical information on other affected individuals was obtained from knowledgeable family members. The mean +/- S.D. age of onset of the disease was 54 +/- 6.9 years, with a range of 43-66 years. The duration of the index patient's disease until death was 8 months. Using single strand conformational polymorphism (SSCP) analysis, we studied the index patient's exons 1, 2 and 4 of the Cu/Zn superoxide dismutase gene (SOD1) on chromosome 21. A variant banding pattern was observed for exon 1. Sequencing studies showed a previously undescribed T to A missense mutation at position 8 in exon 1 of the SOD1 gene. This mutation results in the elimination of an Eco57I restriction site. Whereas the index patient was heterozygous for this restriction site, 50 unrelated healthy controls and an unaffected brother were not. The mutation lies in a region involved in dimer contact in the three-dimensional structure of the SOD1 protein. This region comprises other known sites for ALS-causing mutations.


Assuntos
Esclerose Lateral Amiotrófica/genética , Genes/genética , Superóxido Dismutase/genética , Adulto , Idade de Início , Áustria , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mutação/genética
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