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1.
J Clin Psychol ; 80(7): 1618-1633, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38564307

RESUMO

OBJECTIVE: The Mental Health Self-Direction Scale (MHSD) measures the extent to which clients are able to resolve mental problems by themselves. Because this scale had not yet been evaluated, the aims of this paper were (a) to evaluate and improve the MHSD and (b) to explore the sensitivity to change of the improved scale. METHOD: The MHSD was evaluated and improved by means of confirmatory factor analyses of data from one longitudinal and two cross-sectional outpatient sample. Inconsistent items were removed in a stepwise fashion. Subsequently, the scale's sensitivity to change was explored in the longitudinal sample by using latent growth curve models. RESULTS: The original 31-item scale was reduced to a more stable version with 19 items that yielded four factors named: actorship, demoralization, commitment, and understanding. Throughout clients' treatment, actorship and understanding tended to increase; demoralization tended to decrease; and commitment remained consistently high. CONCLUSIONS: The abridged MHSD scale is stable and sensitive to change. It measures the extent to which clients experience and develop self-direction throughout their treatment. With the use of the new MHSD scale, new views on mental health that emphasize clients' ability to actively engage and cope with health-challenges can be incorporated into clinical treatment.


Assuntos
Transtornos Mentais , Psicometria , Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Estudos Transversais , Psicometria/instrumentação , Psicometria/normas , Estudos Longitudinais , Adulto Jovem , Análise Fatorial , Idoso
2.
BMC Health Serv Res ; 23(1): 326, 2023 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-37005612

RESUMO

BACKGROUND: Measurement-Based Care (MBC) is the routine administration of measures, clinicians' review of the feedback and discussion of the feedback with their clients, and collaborative evaluation of the treatment plan. Although MBC is a promising way to improve outcomes in clinical practice, the implementation of MBC faces many barriers, and its uptake by clinicians is low. The purpose of this study was to investigate whether implementation strategies that were developed with clinicians and aimed at clinicians had an effect on (a) clinicians' uptake of MBC and (b) clients' outcomes of MBC. METHODS: We used an effectiveness-implementation hybrid design based on Grol and Wensing's implementation framework to assess the impact of clinician-focused implementation strategies on both clinicians' uptake of MBC and outcomes obtained with MBC for clients in general mental health care. We hereby focused on the first and second parts of MBC, i.e., the administration of measures and use of feedback. Primary outcome measures were questionnaire completion rate and discussion of the feedback with clients. Secondary outcomes were treatment outcome, treatment length, and satisfaction with treatment. RESULTS: There was a significant effect of the MBC implementation strategies on questionnaire completion rate (one part of clinicians' uptake), but no significant effect on the amount of discussion of the feedback (the other part of clinicians' uptake). Neither was there a significant effect on clients' outcomes (treatment outcome, treatment length, and satisfaction with treatment). Due to various study limitations, the results should be viewed as exploratory. CONCLUSIONS: Establishing and sustaining MBC in real-world general mental health care is complex. This study helps to disentangle the effects of MBC implementation strategies on differential clinician uptake, but the effects of MBC implementation strategies on client outcomes need further examination.


Assuntos
Serviços de Saúde Mental , Saúde Mental , Humanos , Resultado do Tratamento
3.
Int J Mol Sci ; 24(6)2023 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-36983060

RESUMO

Ageing is associated with notorious alterations in neurons, i.e., in gene expression, mitochondrial function, membrane degradation or intercellular communication. However, neurons live for the entire lifespan of the individual. One of the reasons why neurons remain functional in elderly people is survival mechanisms prevail over death mechanisms. While many signals are either pro-survival or pro-death, others can play both roles. Extracellular vesicles (EVs) can signal both pro-toxicity and survival. We used young and old animals, primary neuronal and oligodendrocyte cultures and neuroblastoma and oligodendrocytic lines. We analysed our samples using a combination of proteomics and artificial neural networks, biochemistry and immunofluorescence approaches. We found an age-dependent increase in ceramide synthase 2 (CerS2) in cortical EVs, expressed by oligodendrocytes. In addition, we show that CerS2 is present in neurons via the uptake of oligodendrocyte-derived EVs. Finally, we show that age-associated inflammation and metabolic stress favour CerS2 expression and that oligodendrocyte-derived EVs loaded with CerS2 lead to the expression of the antiapoptotic factor Bcl2 in inflammatory conditions. Our study shows that intercellular communication is altered in the ageing brain, which favours neuronal survival through the transfer of oligodendrocyte-derived EVs containing CerS2.


Assuntos
Vesículas Extracelulares , Neurônios , Animais , Vesículas Extracelulares/metabolismo , Encéfalo/metabolismo , Inflamação/metabolismo
4.
Adm Policy Ment Health ; 49(5): 707-721, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35428931

RESUMO

In recent years, there has been an increasing focus on routine outcome monitoring (ROM) to provide feedback on patient progress during mental health treatment, with some systems also predicting the expected treatment outcome. The aim of this study was to elicit patients' and psychologists' preferences regarding how ROM system-generated feedback reports should display predicted treatment outcomes. In a discrete-choice experiment, participants were asked 12-13 times to choose between two ways of displaying an expected treatment outcome. The choices varied in four different attributes: representation, outcome, predictors, and advice. A conditional logistic regression was used to estimate participants' preferences. A total of 104 participants (68 patients and 36 psychologists) completed the questionnaire. Participants preferred feedback reports on expected treatment outcome that included: (a) both text and images, (b) a continuous outcome or an outcome that is expressed in terms of a probability, (c) specific predictors, and (d) specific advice. For both patients and psychologists, specific predictors appeared to be most important, specific advice was second most important, a continuous outcome or a probability was third most important, and feedback that includes both text and images was fourth in importance. The ranking in importance of both the attributes and the attribute levels was identical for patients and psychologists. This suggests that, as long as the report is understandable to the patient, psychologists and patients can use the same ROM feedback report, eliminating the need for ROM administrators to develop different versions.


Assuntos
Comportamento de Escolha , Preferência do Paciente , Retroalimentação , Humanos , Saúde Mental , Preferência do Paciente/psicologia , Inquéritos e Questionários
5.
Forensic Sci Int Synerg ; 3: 100131, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33532721

RESUMO

Bone samples are utilized as a source of DNA in disaster victim identification and human remains investigations. However, DNA recovery from bones is time consuming and prone to contamination. A logical approach for postmortem identification is to validate efficient DNA extraction methods requiring less bone material using improved molecular kits with less hands-on time and workflows that facilitate faster turn-around time for processing. In this study, we evaluated DNA yield and amplification efficiency of DNA extracts using a new custom bone demineralization buffer (DMB; Promega) and extracted via manual and automated DNA IQ™ workflows. Including the demineralization step, the bone protocol can be completed in ∼4 h and even less with minimal sample handling when automated. Overall, a rapid and simple DNA extraction with improved allele recovery was validated using degraded bone samples exposed to tropical environments and post-disaster recovery as well as adverse conditions of embalming prior to internment.

6.
Clin Psychol Psychother ; 27(6): 915-924, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32441801

RESUMO

Goal setting in psychological treatments may have favourable effects on patients' motivation and treatment outcomes. Therefore, it seems important to detect when patients do not perceive clear treatment goals. The current study presents a questionnaire measuring patients' perceived lack of goal clarity. The cross-sectional study consisted of 742 adult outpatients with diverse mental disorders. Patients completed the perceived lack of goal clarity questionnaire, and additional items measuring goal setting and evaluation, therapeutic alliance, symptom levels, patients' dependency on their treatment, and their expected and needed number of future treatment sessions. Exploratory factor analysis and reliability analyses resulted in a unidimensional and reliable questionnaire (nine items, α = .85). Additional findings showed that 23% of the treatments lacked initial goal setting according to the patients. Also, perceived lack of goal clarity was lower when treatment goals were established explicitly at the start of treatment, were formulated together with the therapist, and were discussed regularly during treatment, and treatment progress was monitored regularly. Moreover, patients reporting their goals as unclear also reported a poorer quality of the therapeutic alliance, higher symptom levels, increased need for future sessions, but also lower levels of care dependency. These findings underscore the importance of perceived goal clarity in psychological treatments, although the relation with actual goal setting remains uncertain.


Assuntos
Objetivos , Motivação , Adulto , Estudos Transversais , Humanos , Reprodutibilidade dos Testes , Inquéritos e Questionários
7.
J Deaf Stud Deaf Educ ; 25(2): 178-187, 2020 04 05.
Artigo em Inglês | MEDLINE | ID: mdl-31799612

RESUMO

This study was aimed at validating the Individual Recovery Outcomes Counter (I.ROC) for deaf, hard-of-hearing, and tinnitus patients in a mental health care setting. There is a need for an accessible instrument to monitor treatment effects in this population. The I.ROC measures recovery, seeing recovery as a process of experiencing a meaningful life, despite the limitations caused by illness or disability. A total of 84 adults referred to 2 specialist mental health centers for deaf, hard-of-hearing, and tinnitus adults in the Netherlands completed the Dutch version of I.ROC and 3 other instruments. A total of 25 patients refused or did not complete the instruments: 50% of patients using sign language and 18% of patients using spoken language. Participants completed the measures at intake and then every 3 months. In this sample I.ROC demonstrated good internal consistency and convergent validity. Sensitivity to change was good, especially over a period of 6 or 9 months. This study provides preliminary evidence that the I.ROC is a valid instrument measuring recovery for hard-of-hearing and tinnitus patients using spoken language. For deaf patients using sign language, specifically those with limited language skills in spoken and written Dutch, more research is needed.


Assuntos
Surdez/psicologia , Perda Auditiva/psicologia , Audição/fisiologia , Desenvolvimento da Linguagem , Saúde Mental , Pessoas com Deficiência Auditiva/psicologia , Surdez/fisiopatologia , Perda Auditiva/fisiopatologia , Humanos
8.
BMC Psychiatry ; 18(1): 225, 2018 07 13.
Artigo em Inglês | MEDLINE | ID: mdl-30005594

RESUMO

BACKGROUND: The present study investigates the suitability of various treatment outcome indicators to evaluate performance of mental health institutions that provide care to patients with severe mental illness. Several categorical approaches are compared to a reference indicator (continuous outcome) using pretest-posttest data of the Health of Nation Outcome Scales (HoNOS). METHODS: Data from 10 institutions and 3189 patients were used, comprising outcomes of the first year of treatment by teams providing long-term care. RESULTS: Findings revealed differences between continuous indicators (standardized pre-post difference score ES and ΔT) and categorical indicators (SEM, JTRCI, JTCS, JTRCI&CS, JTrevised) on their ranking of institutions, as well as substantial differences among categorical indicators; the outcome according to the traditional JT approach was most concordant with the continuous outcome indicators. CONCLUSIONS: For research comparing group averages, a continuous outcome indicator such as ES or ΔT is preferred, as this best preserves information from the original variable. Categorical outcomes can be used to illustrate what is accomplished in clinical terms. For categorical outcome, the classical Jacobson-Truax approach is preferred over the more complex method of Parabiaghi et al. with eight outcome categories. The latter may be valuable in clinical practice as it allows for a more detailed characterization of individual patients.


Assuntos
Transtornos Mentais , Avaliação de Resultados em Cuidados de Saúde/métodos , Administração dos Cuidados ao Paciente , Adulto , Feminino , Humanos , Masculino , Transtornos Mentais/epidemiologia , Transtornos Mentais/terapia , Saúde Mental/estatística & dados numéricos , Pessoa de Meia-Idade , Países Baixos/epidemiologia , Administração dos Cuidados ao Paciente/métodos , Administração dos Cuidados ao Paciente/estatística & dados numéricos , Resultado do Tratamento
9.
Clin Psychol Psychother ; 24(5): 1205-1218, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28181374

RESUMO

The Treatment Support Measure (TSM) Parent and Youth were created to help clinicians with actionable feedback when youths are not making sufficient progress in treatment. This study examined the psychometric properties of the Dutch TSM Parent and TSM Youth. Parents (n = 172) and youth (n = 122) were recruited at 2 outpatient mental health care institutions. Children of participating parents (50.6% boys) had a mean age of 11.9 years (SD = 3.46; range 4-18). Participating youth (30.3% boys) had a mean age of 15.68 years (SD = 1.75; range 12-18). Participants were asked to complete the TSM and questionnaires measuring related constructs once during treatment. Responses to the TSM Parent items were explained by 9 instead of 5 subscales, and responses to the TSM Youth items were explained by 8 instead of 4 subscales. The internal consistency reliability of both the TSM Parent and the TSM Youth scales was generally good. The convergent validity of the TSM Parent and the TSM Youth was also good, although the divergent validity was less convincing. The criterion validity was inconclusive; the TSM Parent was not able to differentiate between problematic and nonproblematic treatments, but multiple scales of the TSM Youth were able to differentiate between these groups. The TSM Parent and TSM Youth have potential to be helpful tools in clinical practice. They could signal potential barriers to youth progress and direct the conversation between the clinician and youth and parents about adaptation of treatment. KEY PRACTITIONER MESSAGE: This is the first study to investigate the psychometric properties of the Treatment Support Measure (TSM) Parent and Youth versions, which are created to help clinicians with actionable feedback when youths are not making sufficient progress in treatment. The Dutch TSM Parent and TSM Youth have moderate to good psychometric properties. The Dutch TSM Parent and TSM Youth might be helpful tools for use in clinical practice: they contain variables that are related to youth outcome, can signal potential barriers to youth progress, and can direct the conversation between the clinician and the youth and parents about adaptation of treatment. The Dutch TSM Parent and TSM Youth could be added to the regular ROM to facilitate both routine monitoring of outcome and direct and concrete aid to the here-and-now relational processes in treatment.


Assuntos
Comportamento do Adolescente/psicologia , Tomada de Decisão Clínica/métodos , Transtornos Mentais/terapia , Pais , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Transtornos Mentais/psicologia , Psicometria , Reprodutibilidade dos Testes , Inquéritos e Questionários , Traduções , Falha de Tratamento
10.
Mar Drugs ; 14(11)2016 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-27801785

RESUMO

Cone snails are predatory creatures using venom as a weapon for prey capture and defense. Since this venom is neurotoxic, the venom gland is considered as an enormous collection of pharmacologically interesting compounds having a broad spectrum of targets. As such, cone snail peptides represent an interesting treasure for drug development. Here, we report five novel peptides isolated from the venom of Conus longurionis, Conus asiaticus and Conus australis. Lo6/7a and Lo6/7b were retrieved from C. longurionis and have a cysteine framework VI/VII. Lo6/7b has an exceptional amino acid sequence because no similar conopeptide has been described to date (similarity percentage <50%). A third peptide, Asi3a from C. asiaticus, has a typical framework III Cys arrangement, classifying the peptide in the M-superfamily. Asi14a, another peptide of C. asiaticus, belongs to framework XIV peptides and has a unique amino acid sequence. Finally, AusB is a novel conopeptide from C. australis. The peptide has only one disulfide bond, but is structurally very different as compared to other disulfide-poor peptides. The peptides were screened on nAChRs, NaV and KV channels depending on their cysteine framework and proposed classification. No targets could be attributed to the peptides, pointing to novel functionalities. Moreover, in the quest of identifying novel pharmacological targets, the peptides were tested for antagonistic activity against a broad panel of Gram-negative and Gram-positive bacteria, as well as two yeast strains.


Assuntos
Conotoxinas/química , Conotoxinas/farmacologia , Caramujo Conus/química , Venenos de Moluscos/química , Venenos de Moluscos/farmacologia , Peptídeos/química , Peptídeos/farmacologia , Sequência de Aminoácidos , Animais , Antibacterianos/farmacologia , Antifúngicos/farmacologia , Inibidores da Colinesterase/farmacologia , Dissulfetos/química , Bactérias Gram-Negativas/efeitos dos fármacos , Bactérias Gram-Positivas/efeitos dos fármacos , Testes de Sensibilidade Microbiana , Oócitos , Oceano Pacífico , Bloqueadores dos Canais de Potássio/farmacologia , Bloqueadores dos Canais de Sódio/farmacologia , Xenopus , Leveduras/efeitos dos fármacos
11.
Biopolymers ; 106(5): 737-45, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27271997

RESUMO

Tert-butyloxycarbonyl (t-Boc)-based native chemical ligation (NCL) techniques commonly employ hydrogen fluoride (HF) to create the thioester fragment required for the ligation process. Our research aimed to assess the replacement of HF with Trifluoromethanesulfonic acid (TFMSA). Here we examined a 33 amino acid test peptide, Huwentoxin-I (HwTx-I) as a novel candidate for our TFMSA cleavage protocol. Structurally HwTx-I has an X-Cys(16) -Cys(17) -X sequence mid-region, which makes it an ideal candidate for NCL. Experiments determined that the best yields (16.8%) obtained for 50 mg of a thioester support resin were achieved with a TFMSA volume of 100 µL with a 0.5-h incubation on ice, followed by 2.0 h at room temperature. RP-HPLC/UV and mass spectra indicated the appropriate parent mass and retention of the cleaved HwTx-I N-terminal thioester fragment (Ala(1) -Cys(16) ), which was used in preparation for NCL. The resulting chemically ligated HwTx-I was oxidized/folded, purified, and then assessed for pharmacological target selectivity. Native-like HwTx-I produced by this method yielded an EC50 value of 340.5 ± 26.8 nM for Nav 1.2 and an EC50 value of 504.1 ± 81.3 nM for Nav 1.3, this being similar to previous literature results using native material. This article represents the first NCL based synthesis of this potent sodium channel blocker. Our illustrated approach removes potential restrictions in the advancement of NCL as a common peptide laboratory technique with minimal investment, and removes the hazards associated with HF usage. © 2016 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 106: 737-745, 2016.


Assuntos
Técnicas de Química Sintética/métodos , Mesilatos/química , Proteínas de Répteis/síntese química , Venenos de Aranha/síntese química , Proteínas de Répteis/química , Venenos de Aranha/química
12.
Health Res Policy Syst ; 13: 69, 2015 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-26572126

RESUMO

BACKGROUND: The Evidence-Based Practice Attitude Scale (EBPAS) was developed in the United States to assess attitudes of mental health and welfare professionals toward evidence-based interventions. Although the EBPAS has been translated in different languages and is being used in several countries, all research on the psychometric properties of the EBPAS within youth care has been carried out in the United States. The purpose of this study was to investigate the psychometric properties of the Dutch version of the EBPAS. METHODS: After translation into Dutch, the Dutch version of the EBPAS was examined in a diverse sample of 270 youth care professionals working in five institutions in the Netherlands. We examined the factor structure with both exploratory and confirmatory factor analyses and the internal consistency reliability. We also conducted multiple linear regression analyses to examine the association of EBPAS scores with professionals' characteristics. It was hypothesized that responses to the EBPAS items could be explained by one general factor plus four specific factors, good to excellent internal consistency reliability would be found, and EBPAS scores would vary by age, sex, and educational level. RESULTS: The exploratory factor analysis suggested a four-factor solution according to the hypothesized dimensions: Requirements, Appeal, Openness, and Divergence. Cronbach's alphas ranged from 0.67 to 0.89, and the overall scale alpha was 0.72. The confirmatory factor analyses confirmed the factor structure and suggested that the lower order EBPAS factors are indicators of a higher order construct. However, Divergence was not significantly correlated with any of the subscales or the total score. The confirmatory bifactor analysis endorsed that variance was explained both by a general attitude towards evidence-based interventions and by four specific factors. The regression analyses showed an association between EBPAS scores and youth care professionals' age, sex, and educational level. CONCLUSIONS: The present study provides strong support for a structure with a general factor plus four specific factors and internal consistency reliability of the Dutch version of the EBPAS in a diverse sample of youth care professionals. Hence, the factor structure and reliability of the original version of the EBPAS seem generalizable to the Dutch version of the EBPAS.


Assuntos
Atitude do Pessoal de Saúde , Proteção da Criança , Atenção à Saúde , Prática Clínica Baseada em Evidências , Serviços de Saúde Mental , Inquéritos e Questionários , Adolescente , Adulto , Criança , Análise Fatorial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Países Baixos , Psicometria , Reprodutibilidade dos Testes , Estados Unidos , Adulto Jovem
13.
Neuropharmacology ; 95: 269-77, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25862296

RESUMO

In the last decades, Ts1 has not only been the subject of many studies, it has also been considered as a very useful tool to investigate NaV channels and to explore the exact role of NaV channels in channelopathies. Ts1 is believed to modulate the activation process of NaV upon interaction at the neurotoxin binding site 4. Our aim was to carry out an in depth functional characterization of Ts1 on a wide array of Nav channels, in order to investigate its mechanism of action and to verify if Ts1 can indeed be considered as a prototype site 4 selective toxin, valid for all the Nav isoforms we know currently. Ts1 has been subjected to an in-depth functional investigation on 9 NaV isoforms expressed in Xenopus laevis oocytes. Ts1 does not only interfere with the activation process but also modulates the inactivation in a bell-shaped voltage-dependent matter. Furthermore, Ts1 altered the ion selectivity through insect NaV. without influencing the tetrodotoxin selectivity of the channels. Finally, Ts1 was also found to inhibit the sodium current through the cardiac Nav1.5 isoform. On the basis of the totally unexpected plethora of Nav modulations as induced by Ts1, we demonstrate that caution is required in interpretation the in vivo experiments when using Ts1. The electrophysiological characterization of Ts1 indeed shows that the general accepted contours of NaV binding sites are much more obscure than believed and that interpretation of NaV pharmacology upon toxin binding is more complex than believed thus far.


Assuntos
Moduladores de Transporte de Membrana/farmacologia , Venenos de Escorpião/farmacologia , Canais de Sódio Disparados por Voltagem/metabolismo , Animais , Sítios de Ligação/efeitos dos fármacos , Humanos , Proteínas de Insetos/metabolismo , Potenciais da Membrana/efeitos dos fármacos , Potenciais da Membrana/fisiologia , Camundongos , Oócitos/efeitos dos fármacos , Oócitos/metabolismo , Técnicas de Patch-Clamp , Conformação Proteica/efeitos dos fármacos , Isoformas de Proteínas , Ratos , Venenos de Escorpião/metabolismo , Sódio/metabolismo , Tetrodotoxina/farmacologia , Canais de Sódio Disparados por Voltagem/química , Xenopus laevis
14.
Toxicon ; 99: 73-9, 2015 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-25816998

RESUMO

Scorpion venom consists of a complex mixture of molecules including biologically active compounds. Because of their high potency and selectivity, toxins have medical applicability. In the last decades, scorpion toxins have thus gained considerable interest among scientist in the fields of pharmacology, biophysics and neurobiology. Identification of scorpion venom peptides and toxins can be achieved based on transcriptome approaches. We constructed the first cDNA library and Expressed Sequence Tag (EST) study to explore the transcriptomic composition of the telson from the southern African scorpion Hottentotta conspersus, belonging to the family Buthidae. We obtained 21 new venom-related sequences (8 contigs and 16 singlets) from a total of 98 ESTs analyzed, including putative neurotoxins (chloride, potassium, sodium and calcium channel toxins), bradykinin-potentiating peptides and other venom peptides without established function. These novel toxin-related sequences might serve as basis for further research both of pharmaceutical and phylogenetic nature.


Assuntos
Proteínas de Artrópodes/metabolismo , Neurotoxinas/metabolismo , Venenos de Escorpião/metabolismo , Escorpiões/metabolismo , África Austral , Sequência de Aminoácidos , Animais , Proteínas de Artrópodes/química , Proteínas de Artrópodes/genética , Proteínas de Artrópodes/toxicidade , Biologia Computacional , Etiquetas de Sequências Expressas , Biblioteca Gênica , Moduladores de Transporte de Membrana/análise , Moduladores de Transporte de Membrana/química , Moduladores de Transporte de Membrana/metabolismo , Moduladores de Transporte de Membrana/toxicidade , Dados de Sequência Molecular , Família Multigênica , Neurotoxinas/química , Neurotoxinas/genética , Neurotoxinas/toxicidade , Peptídeos/química , Peptídeos/genética , Peptídeos/metabolismo , Peptídeos/toxicidade , Filogenia , Proteômica , Receptores da Bradicinina/agonistas , Venenos de Escorpião/química , Venenos de Escorpião/genética , Venenos de Escorpião/toxicidade , Alinhamento de Sequência , Homologia de Sequência de Aminoácidos , Transcriptoma
15.
Toxicon ; 91: 145-54, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25194747

RESUMO

Cone snails (Conus sp.) are poisonous animals that can be found in all oceans where they developed a venomous strategy to prey or to defend. The venom of these species contains an undeniable source of unique and potent pharmacologically active compounds. Their peptide compounds, called conotoxins, are not only interesting for the development of new pharmaceutical ligands, but they are also useful for studying their broad spectrum of targets. One conotoxin family in particular, the α-conotoxins, acts on nicotinic acetylcholine receptors (nAChRs) which dysfunctions play important roles in pathologies such as epilepsy, myasthenic syndromes, schizophrenia, Parkinson's disease and Alzheimer's disease. Here we define a new subclass of the α-conotoxin family. We purified the venom of a yet unexplored cone snail species, i.e. Conus australis, and we isolated a 16-amino acid peptide named α-conotoxin AusIA. The peptide has the typical α-conotoxin CC-Xm-C-Xn-C framework, but both loops (m/n) contain 5 amino acids, which has never been described before. Using conventional electrophysiology we investigated the response of synthetically made globular (I-III, II-IV) and ribbon (I-IV, II-III) AusIA to different nicotinic acetylcholine receptors. The α7 nAChR was the only receptor found to be blocked with a similar potency by both peptide-configurations. This suggests that both α5/5 conotoxin isomers might be present in the venom gland of C. australis. NMR spectroscopy showed that no secondary structures define the peptides' three-dimensional topology. Moreover, the ribbon configuration, which is generally considered to be non-native, is more stable than the globular isomer. Accordingly, our findings show relevancy concerning the α-conotoxin classification which might be helpful in the design of novel therapeutic compounds.


Assuntos
Conotoxinas/isolamento & purificação , Caramujo Conus/química , Venenos de Moluscos/química , Animais , Conotoxinas/química , Ressonância Magnética Nuclear Biomolecular
16.
Bull Menninger Clin ; 78(2): 160-76, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24870848

RESUMO

The association between level of personality organization as assessed by theory-driven profile interpretation of the MMPI (Hathaway & McKinley, 1943) Dutch Short Form and treatment outcome was investigated in a naturalistic follow-up study among 121 psychotherapy inpatients who had been treated for their severe personality pathology. Treatment outcome was measured with the Brief Symptom Inventory (De Beurs & Zitman, 2006). Personality organization was associated with severity of psychopathology at baseline, the end of treatment, and 36 months after baseline. At 36 months after baseline, all patients except those with the high-level borderline organization profile and the psychotic borderline profile maintained their improvement. Contrary to expectations, (a) personality organization did not differentiate between patients with successful and unsuccessful out-comes, and (b) patients with a neurotic personality organization did not respond better than those with a borderline personality organization. Because of the small N, conclusions are tentative.


Assuntos
MMPI , Transtornos da Personalidade/psicologia , Transtornos da Personalidade/terapia , Personalidade , Adulto , Feminino , Seguimentos , Humanos , Pacientes Internados , Masculino , Psicoterapia , Resultado do Tratamento , Adulto Jovem
17.
Toxicon ; 83: 75-83, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24631597

RESUMO

Since it is an apocrine secretion, scorpion venom is a complex mixture that contains a variety of low-molecular-weight basic proteins (neurotoxins), mucus, salts, as well as a large number of other constituents. Diversity of scorpion venom peptides exists also at the transcript level. Two kinds of venom peptides are typically considered: the neurotoxins and the antimicrobial peptides. We constructed a cDNA library and carried an EST (Expressed Sequence Tag) approach to overview the different peptides in the transcriptome of the telson from Parabuthus stridulus. P. stridulus are psammophilous and highly venomous scorpions endemic to Namibia (Prendini 2004) with medical relevance because of important human envenomation occurrence. We obtained 111 ESTs, 20% of them corresponding to cellular process transcripts, 7% to hypothetical proteins and 17% were sequences without good matches, but the majority of ESTs, 56%, corresponds to transcripts encoding for different venom components, including voltage-gated sodium, potassium and calcium channel toxins, antimicrobial peptides and other venom and cell proteins. To the best of our knowledge this report contains the first transcriptome analysis of genes transcribed by the venomous gland of the scorpion species P. stridulus, belonging to the family of medically important Buthidae scorpions. One hundred and eleven ESTs were analyzed, showing an important number of genes that encode for products similar to known scorpion venom components. In total, 17 unique and novel sequences were indentified. The identification and characterization of these compounds will be a good source of novel pharmacological tools for studying ion channels and the understanding of the physiological effects of toxins in P. stridulus envenomations at a molecular level.


Assuntos
Neurotoxinas/genética , Venenos de Escorpião/genética , Escorpiões/genética , Transcriptoma , Sequência de Aminoácidos , Animais , Etiquetas de Sequências Expressas , Biblioteca Gênica , Dados de Sequência Molecular , Alinhamento de Sequência
18.
J Psychiatr Pract ; 18(6): 420-9, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23160247

RESUMO

BACKGROUND: Impulsive acts, parasuicidal behavior, and other therapy disruptive incidents occur frequently in the treatment of patients with personality disorders and increase the risk that patients will drop out of treatment. OBJECTIVE: This study examined the predictive validity of the Minnesota Multiphasic Personality Inventory (MMPI)-2 Restructured Clinical (RC) and Psychopathology Five (PSY-5) Scales for therapy disruptive behavior and compared them with the original clinical scales. METHODS: Using an inventory, the treatment staff recorded the therapy disruptive behavior of 104 patients with personality disorders who were receiving inpatient psychotherapy. RESULTS: Both the RC and the PSY-5 scales predicted several categories of therapy disruptive behavior, and both scales predicted more categories of therapy disruptive behavior than the original clinical scales. Anger outbursts were predicted especially well by a combination of two of the RC scales. CONCLUSIONS: The information about the MMPI-2 obtained in this study may be helpful in case formulation when initiating inpatient treatment for patients with personality disorders.


Assuntos
Pacientes Internados/psicologia , MMPI/normas , Escalas de Graduação Psiquiátrica/normas , Psicoterapia/métodos , Adulto , Ira/fisiologia , Feminino , Humanos , Comportamento Impulsivo/fisiopatologia , Masculino , Transtornos da Personalidade/classificação , Transtornos da Personalidade/diagnóstico , Transtornos da Personalidade/terapia , Valor Preditivo dos Testes , Psicometria/instrumentação , Reprodutibilidade dos Testes , Ideação Suicida , Fatores de Tempo , Resultado do Tratamento
19.
Bull Menninger Clin ; 73(3): 226-38, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19807225

RESUMO

Although psychodynamic interviews often provide a broad spectrum of interesting and useful information for the therapist, most of these interviews lack sufficient psychometric quality. So far, the Developmental Profile interview seemed an exception. However, only first-level reliability ratings based on a written account of an interview had been conducted. This study presents the results of a second-level reliability study of the Developmental Profile, based on ratings of videotapes of the Profile interview. A total of 32 videotaped interviews with psychotherapeutic inpatients were rated by three independent raters in compliance with the new version of the Developmental Profile rating manual. Contrary to earlier findings, the authors found insufficient reliability. Results are discussed.


Assuntos
Escalas de Graduação Psiquiátrica/normas , Psicoterapia/instrumentação , Adulto , Feminino , Humanos , Entrevista Psicológica , Masculino , Pessoa de Meia-Idade , Psicometria , Reprodutibilidade dos Testes , Gravação de Videoteipe , Adulto Jovem
20.
J Occup Rehabil ; 19(4): 323-32, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19760489

RESUMO

OBJECTIVE: To investigate which factors predict return to work (RTW) after 3 and 6 months in employees sick-listed due to minor mental disorders. METHODS: Seventy GPs recruited 194 subjects at the start of sick leave due to minor mental disorders. At baseline (T0), 3 and 6 months later (T1 and T2, respectively), subjects received a questionnaire and were interviewed by telephone. Using multivariate logistic regression analyses, we developed three prediction models to predict RTW at T1 and T2. RESULTS: The RTW rates were 38% after 3 months (T1) and 61% after 6 months (T2). The main negative predictors of RTW at T1 were: (a) a duration of the problems of more than 3 months before sick leave; and (b) somatisation. The main negative predictors of RTW at T2 were: (a) a duration of the problems of more than 3 months before sick leave; (b) more than 3 weeks of sick leave before inclusion in the study; and (c) anxiety. The main negative predictors of RTW at T2 for those who had not resumed work at T1 were: (a) more than 3 weeks of sick leave before inclusion in the study; and (b) depression at T1. The predictive power of the models was moderate with AUC-values between 0.695 and 0.763. CONCLUSIONS: The main predictors of RTW were associated with the severity of the problems. A long duration of the problems before the occurrence of sick leave and a long duration of sick leave before seeking help predict a relatively small probability to RTW within 3-6 months. High baseline somatisation and anxiety, and high depression after 3 months make the prospect even worse. Since these predictors are readily assessable with just a few questions and a symptom questionnaire, this opens the opportunity to select high-risk employees for a


Assuntos
Ansiedade/diagnóstico , Escalas de Graduação Psiquiátrica Breve , Depressão/diagnóstico , Licença Médica , Humanos , Entrevistas como Assunto , Valor Preditivo dos Testes , Prognóstico
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