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1.
Eur J Oral Sci ; 132(2): e12972, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38243769

RESUMO

Prisoners' oral health and general health are closely connected and generally poorer than that of the wider population. Moreover, knowledge of prisoners' health literacy is scarce. This study aimed to explore prisoners' perceived oral and general health and how they accessed, understood and assessed health information to gain insight into their health literacy. Twelve prisoners in a high-security prison and a halfway house participated in individual semi-structured interviews. Data was analysed through thematic analysis, which identified five themes: inconsistent self-reporting of general and oral health; autonomous health behaviour through utilizing personal resources; preference for personalized adapted health information; psychological and physical proximity; and barriers. The prisoners perceived their oral and general health as good despite several health problems. They expressed scepticism towards health information from public authorities and made their own health-related choices based on previous experiences, their own 'common sense' and the experiences of people they trusted. Health information was considered useful when adjusted to their needs. Obtaining health-related information through physical encounters was considered more accessible than through online platforms. Adapting the communication to prisoners' expressed needs and their health literacy can enhance the accessibility to improve their oral and general health. In-person encounters would be preferable.


Assuntos
Prisioneiros , Prisões , Humanos , Prisioneiros/psicologia , Pesquisa Qualitativa , Confiança , Nível de Saúde
2.
J Clin Periodontol ; 51(2): 135-144, 2024 02.
Artigo em Inglês | MEDLINE | ID: mdl-37915235

RESUMO

AIM: The aim of this study was to assess patient-reported outcomes (PROs) 8 years after dental implant rehabilitation in a sample with tooth loss due to periodontitis (TLP) and a sample with missing teeth for other reasons (MTOR). MATERIALS AND METHODS: The Norwegian National Insurance Scheme registry of subsidized dental implant therapy was searched, and patients (n = 3083) rehabilitated with dental implants in 2014 were mailed a questionnaire. PROs were described by relative frequencies, and the TLP and MTOR subsamples were compared using chi-square test. Multiple linear regression analyses were used to investigate variables potentially predicting PROs. RESULTS: Of the respondents (n = 1299), more than 90% were partly or fully satisfied with the treatment outcome. Complications were reported by 44.2%. Patients who lost teeth due to periodontitis (n = 784) reported greater oral function improvement and better pre-treatment information, and were more likely to experience complications when compared with patients who lost teeth for other reasons (n = 515). Age, level of education, self-funded cost, pre-treatment information, history of complications and the reason for missing teeth were found to predict PROs. CONCLUSIONS: In a Norwegian population rehabilitated with dental implants in 2014, satisfaction with the treatment outcome and the aesthetic outcome was high, irrespective of the reason for missing teeth. Self-report of complications and lack of pre-treatment information were the strongest predictors of inferior patient satisfaction and also predicted inferior oral function.


Assuntos
Implantes Dentários , Periodontite , Perda de Dente , Humanos , Perda de Dente/complicações , Estética Dentária , Periodontite/etiologia , Inquéritos e Questionários , Serina-Treonina Quinases TOR , Prótese Dentária Fixada por Implante/efeitos adversos
3.
JMIR Res Protoc ; 12: e46926, 2023 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-37801358

RESUMO

BACKGROUND: Poor oral health is common in nursing home residents, and health care professionals report numerous barriers when it comes to the provision of oral care for care-dependent older adults, such as a lack of oral health knowledge and skills, care-resistant behaviors in residents, lack of adequate oral care routines, insufficient systems for documentation of issues related to oral health, a high workload, and unclear responsibilities. An intervention, SmartJournal, has been developed to assist health personnel in preserving older patients' oral health. SmartJournal is a digital tool with three components: (1) documentation of oral hygiene routines; (2) monthly oral health assessment; and (3) education on geriatric oral care. An updated framework for research on complex interventions has been used to guide the various phases in the development of this intervention. This study focuses on the evaluation phase. OBJECTIVE: We aim to assess (1) the effectiveness of SmartJournal use in enhancing nursing home caregivers' capability, opportunity, motivation, and routines related to oral care; and (2) whether SmartJournal use results in improved oral health for nursing home residents. METHODS: We will use a cluster randomized controlled trial to assess impacts of SmartJournal use as specified under study objectives. Nursing homes located in Rogaland, Norway, will be recruited and randomly assigned to an intervention and a control group. The intervention group will be provided with tablets containing SmartJournal and support from research staff, while the control group will continue with existing oral care routines. Both groups will receive oral hygiene packages. The intervention will last for 12 weeks. Measurements will be performed in both groups at baseline, 3 months, and 9 months and include (1) a survey assessing caregivers' capability, opportunity, motivation, and routines related to oral care; and (2) assessment of oral health status in residents using mucosal-plaque score as a primary outcome measure. Analyses will include descriptive statistics and statistical techniques to look for changes and differences in the study variables within and between the intervention and control groups throughout the study period. Associations between study variables will also be investigated. RESULTS: Recruitment of nursing homes for the intervention and control groups was completed in February 2023. Recruitment of individual participants (ie, nursing home residents and caregivers) is ongoing, and baseline measurements are being performed consecutively. Results are expected to be ready for analyses in fall 2024. CONCLUSIONS: We aim to assess the effects of SmartJournal use on oral care and oral health in nursing homes. Results from this work may inform further development and implementation of SmartJournal and similar digital tools aiming to enhance health care services offered to care-dependent people. Finally, SmartJournal may have potential as a learning tool in educational programs for nurses and other health care professionals. TRIAL REGISTRATION: ClinicalTrials.gov NCT05724043; https://clinicaltrials.gov/study/NCT05724043. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/46926.

4.
Eur J Oral Sci ; 131(1): e12907, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36418106

RESUMO

This study aimed to explore the factors associated with oral health-related quality of life (OHRQoL) in a sample with high dental anxiety. Data were obtained from 107 patients attending a therapeutic treatment program for people who have experienced abuse and for those with dental phobia in Norway. Patients completed questionnaires, including the Index of Dental Anxiety and Fear, the Anxiety subscale of the Hospital Anxiety and Depression Scale, and the Oral Impacts on Daily Performance scale, measuring OHRQoL prior to treatment. The various measurement instruments were evaluated psychometrically, and the variables associated with OHRQoL were explored using hierarchical multiple regression. Symptoms of dental anxiety and general anxiety were high, while OHRQoL was poor. Dental anxiety, higher age, higher number of years since the last dental treatment, and higher general anxiety were discernibly associated with lower OHRQoL. The strongest association was found between general anxiety and OHRQoL. In conclusion, several factors were associated with OHRQoL in a sample with high dental anxiety, suggesting a complex picture of dental anxiety. When treating patients with high dental anxiety, dental practitioners should be aware that there may be factors complicating the therapeutic setting, such as general anxiety.


Assuntos
Ansiedade ao Tratamento Odontológico , Saúde Bucal , Humanos , Qualidade de Vida , Odontólogos , Medo , Papel Profissional , Inquéritos e Questionários
5.
Int J Prison Health ; 19(2): 251-269, 2023 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-38899622

RESUMO

PURPOSE: Prisoners' oral health is an often overseen, yet important aspect of the general health of prisoners. To develop effective measures to improve the situation, it is important to get an overview of existing research. The purpose of this study is to examine and analyse existing research on oral health of prisoners and provide a thorough understanding of prisoners' oral health and related factors. DESIGN/METHODOLOGY/APPROACH: Due to relatively few scientific papers on prisoners' oral health, an integrative review was chosen. Integrative reviews allow for the inclusion of diverse methodologies. A literature search was conducted, followed by an assessment of the quality of the studies by using the Mixed Methods Appraisal Tool. Thematic analysis was used to analyse the studies. FINDINGS: The few studies addressing European prisoners' oral health in the last 21 years differ in design and methodology. The results from this review indicate that prisoners' oral health is a complex phenomenon and should be understood from both individual and organisational perspectives. More research is needed to bridge the gap in the literature on prisoners' oral health. ORIGINALITY/VALUE: To the best of the authors' knowledge, this is the first literature review on European prisoners' oral health.

6.
BMC Health Serv Res ; 22(1): 533, 2022 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-35459239

RESUMO

BACKGROUND: Torture, abuse and dental anxiety (TADA) are often precursors to developing a pathological relationship with dental care due to elevated anxiety. Consequently, patients who suffer from one or more of these tend to avoid dental services. This could leave them with severe tooth decay, which could affect their general and psychosocial health. Norwegian dental services have implemented the TADA service to specifically alleviate dental anxiety and restore oral health for the TADA patient group. However, the service has not been evaluated, and there is a need to understand how and why this service works, for whom, under what circumstances. Therefore, this study aimed to develop theories on how the service's structure alleviates dental anxiety and restores these patients' oral health. Although developed in a Norwegian context, these theories may be applicable to other national and international contexts. METHODS: This realist evaluation comprised multiple sequential methods of service and policy documents (n = 13), followed by interviews with service developers (n = 12). RESULTS: The analysis suggests that, by subsidising the TADA service, the Norwegian state has removed financial barriers for patients. This has improved their access to the service and, hence, their service uptake. National guidelines on service delivery are perceived as open to interpretation, and can hereby meet the needs of a heterogeneous patient group. The services have become tailored according to the available regional resources and heterogeneous needs of the patient population. A perceived lack of explicit national leadership and cooperative practices has resulted in regional service teams becoming self-reliant and insular. While this has led to cohesion within each regional service, it is not conducive to interservice collaborations. Lastly, the complexity of migration processes and poor dissemination practices is presumed to be the cause of the lack of recruitment of torture survivors to the service. CONCLUSIONS: Policy documents and service developers described the TADA service as a hybrid bottom-up/top-down service that allows teams to practise discretion and tailor their approach to meet individual needs. Being free of charge has improved access to the service by vulnerable groups, but the service still struggles to reach torture survivors.


Assuntos
Tortura , Transtornos de Ansiedade , Ansiedade ao Tratamento Odontológico/prevenção & controle , Humanos , Saúde Bucal , Sobreviventes
7.
Acta Odontol Scand ; 80(8): 573-579, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35403544

RESUMO

OBJECTIVES: This study investigated differences in high school students' subjective and objective knowledge- and concerns about preventing caries and/or erosive tooth wear and the associations between these variables. MATERIALS AND METHODS: A survey was conducted among students at 16 high schools in Norway. The survey included a range of fact-based questions to measure objective knowledge about caries and erosive tooth wear, as well as questions about students' perceptions of his/her own knowledge (subjective knowledge) and concerns about preventing the two conditions. RESULTS: There were small differences in subjective knowledge about caries and erosive tooth wear among the 784 students who completed the survey (p < .01). However, students scored significantly higher on objective knowledge about caries (mean 2.99) than about erosive tooth wear (mean 1.45), p < .01, and seemed to confuse the two conditions. By contrast, students scored significantly worse on questions about beverages' potential to cause caries (mean 5.18) than to cause erosive tooth wear (mean 6.30), p < .001. Finally, objective knowledge about caries was positively associated with subjective knowledge about caries, but corresponding associations could not be found for erosive tooth wear. CONCLUSIONS: Knowledge about caries and erosive tooth wear seemed to be confused among Norwegian high school students.


Assuntos
Cárie Dentária , Erosão Dentária , Desgaste dos Dentes , Humanos , Feminino , Masculino , Suscetibilidade à Cárie Dentária , Prevalência , Estudos Transversais , Erosão Dentária/etiologia , Erosão Dentária/prevenção & controle , Cárie Dentária/epidemiologia , Cárie Dentária/prevenção & controle , Estudantes
8.
Brain Behav Immun Health ; 21: 100450, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35330865

RESUMO

Background: Dysregulated immune response arising in the periphery can induce depressive symptoms through neuroimmune interactions. Inflammatory oral pathology can be a potent inducer of chronic neuroimmune response relevant to depression. We aimed to synthesize available evidence for the association between inflammatory periodontal diseases (IPD) and major depression (MD) in relation to a broad range of biomarkers. Methods: Medline, Embase, PsycInfo, Cochrane Library, Web of Science and Scopus databases were searched from inception until January 27, 2022. Search terms included subject headings and synonyms for inflammatory periodontal disease and depression. Studies that reported data on both depression and inflammatory periodontal disease as categories along with measurement of a biomarker were considered. Two reviewers independently selected the articles for inclusion, extracted data and assessed the quality of each study. The protocol for this study was registered with PROSPERO, CRD42021215524. Results: Twenty-eight studies were included in the final review-eleven cross-sectional studies, seven case-control studies, and six prospective cohort studies conducted in humans; the remaining four were experimental animal studies. Eighteen studies including all animal studies reported a positive association between depression and periodontal disease; one study reported a negative association and another nine studies found no such associations. Twenty studies reported mixed associations between IPD and biomarkers (i.e, salivary, serum, urine or gingival crevicular fluid cortisol, C reactive protein, cytokines, etc.). Biomarkers related to depression were gingival crevicular fluid cortisol, interleukin 6 (IL-6), Il-1ß, immunoglobulin G against Bacterioides forsythus; root canal lipopolysaccharides; blood IL-6, IL-1ß, cortisol, advanced oxidation protein products, nitric oxide metabolites, lipid hydroperoxides and trapping antioxidant parameter; whereas five studies found no associations between depression and a biomarker. Although animal studies showed interaction of immune, inflammatory and neurotrophic biomarkers in the relationship between depression and periodontal disease, human studies showed mixed findings. In most studies, there were risks of bias due to the sample selection and assessment protocol. Study heterogeneity and limited number of comparable studies reporting on shared biomarkers precluded a meta-analysis. Conclusion: Immune-inflammatory contribution to depression was evident in the context of inflammatory periodontal diseases, but whether biomarkers mediate the associations between IPD and MD needs to be tested through methodologically rigorous studies aiming specifically at this hypothesis.

9.
Eur J Oral Sci ; 130(3): e12860, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35218586

RESUMO

Patients with a trauma history, whether sexual abuse or torture, or dental phobia, tend to avoid dental services due to severe dental anxiety. Subsequently, they experience poor oral health, lower quality of life, and poorer general health. In Norway, a specific service (torture, abuse, and dental anxiety [TADA]) targets these patients' dental anxiety through cognitive behavioural therapy (CBT) prior to dental restoration. By exploring patients' experiences with TADA services using a realist evaluation approach, this paper aims to increase our understanding of how this type of service addresses patients' dental anxiety in terms of its mechanisms and contextual factors. Interviews with TADA patients (n = 15) were analysed through a template analysis driven by context-mechanism-outcome heuristics. The analysis revealed that patients value a dental practitioner who provides a calm and holistic approach, positive judgements and predictability elements that lean towards a person-centred care approach. Provided this, patients felt understood and cared for, their shame was reduced, self-esteem emerged, and control was gained, which led to alleviation of dental anxiety. Therefore, our findings suggest that combining CBT with a person-centred care approach helps alleviate patients' dental anxiety. This provides insights into how dental services could be executed for these patients.


Assuntos
Ansiedade ao Tratamento Odontológico , Tortura , Ansiedade ao Tratamento Odontológico/terapia , Odontólogos , Humanos , Papel Profissional , Qualidade de Vida
10.
Eur J Oral Sci ; 129(6): e12820, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34448277

RESUMO

Patients with dental phobia or a history of trauma tend to avoid dental services, which may, over time, lead to poor oral health. In Norway, a specific service targets these patients by providing exposure therapy to treat their fear of attendance and subsequently enable oral restoration. Dental practitioners deliver the exposure therapy, which requires a role change that deviates from their traditional practice. This paper explores how - and under what circumstances - dental practitioners manage this new role of alleviating dental anxiety for patients with a history of trauma or dental phobia. Using a realist evaluation approach, this paper develops theory describing which contexts promote mechanisms that allow practitioners to alleviate dental anxiety for patients with trauma or dental phobia. A multi-method approach, comprising service documents (n = 13) and stakeholder interviews (n = 12), was applied. The data were then analysed through a content analysis and context-mechanism-outcome heuristic tool. Our findings reveal that dental practitioners must adopt roles that enable trust, a safe space, and gradual desensitisation of the patient to their fear triggers. Adopting these roles requires time and resources to develop practitioners' skills - enabling them to adopt an appropriate communication style and exposure pace for each patient.


Assuntos
Ansiedade ao Tratamento Odontológico , Odontólogos , Medo , Humanos , Noruega , Papel Profissional
11.
Int J Prison Health ; 17(4): 546-559, 2021 Nov 17.
Artigo em Inglês | MEDLINE | ID: mdl-38902900

RESUMO

PURPOSE: Prisoners have poorer oral health than the general population. Good oral health is essential for both social and physical well-being. For prisoners, poor oral health is also related to drug use after release, whereas good oral health is related to successful reintegration into society. The purpose of this study was twofold: to examine the effect of an intervention based on motivational interviewing (MI) on prisoners' oral health-related behavior and to assess if the intervention is a good fit for this population. DESIGN/METHODOLOGY/APPROACH: In total, 16 prisoners in a Norwegian prison were offered a brief MI-based intervention focusing on changing their oral health-related behavior. An oral examination was also performed and the prisoners received a small package containing oral hygiene aids. Two weeks later, a second oral examination and a semi-structured interview were conducted to explore the effect of the intervention and examine the prisoners' responses to the intervention. Qualitative data analyzes were guided by thematic analysis. FINDINGS: The findings indicate that the intervention had positive effects on both the prisoners' motivation to use oral health-related behavior and their performance of oral health-related behavior. The findings also indicate that the intervention was well adapted to the target population. ORIGINALITY/VALUE: This is one of the first studies that explore the effect of an intervention in improving prisoners' oral health and bridges a knowledge gap in the literature. The findings may increase the understanding of how dental services should be organized and offered to provide dental health care to this vulnerable group.

12.
Acta Odontol Scand ; 78(8): 590-598, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32406299

RESUMO

OBJECTIVES: The objectives of the present study were to assess the consumption of acidic beverages, knowledge and concern about preventing dental erosive wear, and to examine potential associations between these variables, in a sample of high school students. MATERIALS AND METHODS: A survey measuring acidic beverage consumption, knowledge and concern about erosive tooth wear was conducted at 13 high schools in Rogaland county, Norway. RESULTS: Of the 850 students who completed the questionnaire, 26% reported that they drink acidic beverages every day. There were significant gender differences for the consumption of acidic drinks. The survey also demonstrated that a high proportion of students lacks basic knowledge of what erosive tooth wear is, and that this lack of knowledge is associated with a more frequent intake of acidic beverages. However, students who responded that they are concerned about preventing dental erosive wear reported that they drink soft drinks and energy drinks less frequently than students who are not concerned about this. CONCLUSIONS: Results from this study support assumptions about a lack of knowledge about dental erosive wear in youth, and that this lack of knowledge is associated with a more frequent intake of acidic drinks.


Assuntos
Erosão Dentária , Adolescente , Bebidas , Bebidas Gaseificadas/efeitos adversos , Comportamento Alimentar , Humanos , Noruega/epidemiologia , Estudantes , Erosão Dentária/induzido quimicamente , Erosão Dentária/epidemiologia
13.
J Proteome Res ; 12(5): 2206-13, 2013 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-23537399

RESUMO

Programmed cell death is a ubiquitous process of utmost importance for the development and maintenance of multicellular organisms. More than 10 different types of programmed cell death forms have been discovered. Several proteomics analyses have been performed to gain insight in proteins involved in the different forms of programmed cell death. To consolidate these studies, we have developed the cell death proteomics (CDP) database, which comprehends data from apoptosis, autophagy, cytotoxic granule-mediated cell death, excitotoxicity, mitotic catastrophe, paraptosis, pyroptosis, and Wallerian degeneration. The CDP database is available as a web-based database to compare protein identifications and quantitative information across different experimental setups. The proteomics data of 73 publications were integrated and unified with protein annotations from UniProt-KB and gene ontology (GO). Currently, more than 6,500 records of more than 3,700 proteins are included in the CDP. Comparing apoptosis and autophagy using overrepresentation analysis of GO terms, the majority of enriched processes were found in both, but also some clear differences were perceived. Furthermore, the analysis revealed differences and similarities of the proteome between autophagosomal and overall autophagy. The CDP database represents a useful tool to consolidate data from proteome analyses of programmed cell death and is available at http://celldeathproteomics.uio.no.


Assuntos
Apoptose , Autofagia , Proteoma/fisiologia , Animais , Proteínas Reguladoras de Apoptose/fisiologia , Células Cultivadas , Bases de Dados de Proteínas , Humanos , Anotação de Sequência Molecular , Proteômica
14.
Electrophoresis ; 33(12): 1814-23, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22740470

RESUMO

Endoplasmic reticulum (ER) stress occurs upon increased levels of unfolded proteins and results in activation of cellular responses such as the unfolded protein response (UPR) and ER-associated protein degradation (ERAD). To examine ER stress, we performed a quantitative proteome analysis of human neuroblastoma cells using stable isotope labeling with amino acids in cell culture (SILAC) in combination with SDS-PAGE and LC-MS/MS. Proteins associated with the ER were overrepresented in the dataset of altered proteins. In particular, ER chaperones responsible for protein folding were significantly upregulated in response to ER stress. The important ER stress regulator 78 kDa glucose-regulated protein (GRP-78 or BiP) was highly upregulated together with several proteins that have been found to form a multiprotein complex with BiP including cyclophilin B, DnaJ homolog subfamily B member 11, endoplasmin, hypoxia upregulated protein 1, protein disulfide isomerase and protein disulfide isomerase A4 upon tunicamycin-induced ER stress. Furthermore, seven aminoacyl-tRNA synthetases and five proteins belonging to the Sec61 complex were increased in response to tunicamycin-induced ER stress.


Assuntos
Estresse do Retículo Endoplasmático/efeitos dos fármacos , Retículo Endoplasmático/efeitos dos fármacos , Retículo Endoplasmático/metabolismo , Proteoma/metabolismo , Tunicamicina/farmacologia , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Eletroforese em Gel de Poliacrilamida , Humanos , Marcação por Isótopo , Neuroblastoma/metabolismo , Mapas de Interação de Proteínas , Proteínas/análise , Proteínas/química , Proteínas/classificação , Proteoma/análise , Espectrometria de Massas em Tandem
15.
J Proteome Res ; 11(3): 1609-20, 2012 Mar 02.
Artigo em Inglês | MEDLINE | ID: mdl-22268697

RESUMO

Sorafenib is a multikinase inhibitor that is approved for use against renal cell and hepatocellular carcinoma. We found that sorafenib potently induced cell death in human neuroblastoma cells. To understand the molecular basis of sorafenib-mediated cell death in human SH-SY5Y cells, we performed a temporal quantitative proteome analysis. The results showed significant quantitative changes of 193 unique proteins. Bioinformatics-assisted pathway analysis of the regulated proteins revealed that mitochondrial proteins, especially components of the electron transport chain and the mitochondrial ribosomes, were significantly affected upon exposure to sorafenib. The observed down-regulation of the respiratory chain complex I (NADH dehydrogenase) was accompanied with loss of mitochondrial transmembrane potential (Δψm) and complete impairment of complex I enzyme activity. The destabilization of complex I subunits was consistent, rapid, and independent of caspase activation as well as Bcl-2 overexpression. This study provides an overview of the molecular machinery driving sorafenib-mediated cell death in neuroblastoma cells and suggests that sorafenib could be a potential therapeutic drug for the treatment of neuroblastoma.


Assuntos
Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Benzenossulfonatos/farmacologia , Regulação para Baixo/efeitos dos fármacos , NADH Desidrogenase/metabolismo , Piridinas/farmacologia , Proteínas Reguladoras de Apoptose/metabolismo , Linhagem Celular Tumoral , Forma Celular/efeitos dos fármacos , Citocromos c/metabolismo , Ativação Enzimática/efeitos dos fármacos , Humanos , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/enzimologia , Mitocôndrias/metabolismo , NADH Desidrogenase/genética , Neuroblastoma , Niacinamida/análogos & derivados , Compostos de Fenilureia , Mapas de Interação de Proteínas , Proteólise/efeitos dos fármacos , Proteoma/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Transdução de Sinais , Sorafenibe , Superóxido Dismutase/metabolismo
16.
Electrophoresis ; 31(11): 1873-85, 2010 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20506421

RESUMO

Taxol (Paclitaxel) is a mitotic inhibitor widely used in cancer therapy. Temporal proteome profiling was performed to study changes of proteins during the different cellular states of HeLa cells caused by exposure to taxol. The changes of proteins over time could be associated with various cellular processes such as mitotic arrest, an intermediate between mitotic arrest and apoptosis, apoptosis, and late apoptosis. Calumenin, stress-induced phosphoprotein 1 (STIP1), and translationally controlled tumor protein (TCTP) were assigned to mitotic arrest and selected for further experiments using immunoblotting and subcellular fractionation. Calumenin translocated from membranes to the cytosol during mitotic arrest and late apoptosis, but was significantly reduced in the cytosol during apoptosis. Translocation of STIP1 to the nucleus was observed at apoptosis and to the cytoskeleton at late apoptosis. TCTP increased in the cytosol at mitotic arrest and in membranes at apoptosis. In addition, the quantitative time courses of Bim isoforms revealed differences between BimL and BimS in comparison with BimEL. In summary, temporal proteome profiling of HeLa cells incubated with taxol allowed the assignment of proteins to certain processes and additional experiments with complementary approaches enabled a more comprehensive understanding of spatial changes of selected proteins during mitotic arrest and apoptosis.


Assuntos
Apoptose/efeitos dos fármacos , Mitose/efeitos dos fármacos , Paclitaxel/farmacologia , Proteoma/efeitos dos fármacos , Proteômica/métodos , Antineoplásicos Fitogênicos/farmacologia , Biomarcadores Tumorais/metabolismo , Proteínas de Ligação ao Cálcio/metabolismo , Eletroforese em Gel Bidimensional , Células HeLa , Proteínas de Choque Térmico/metabolismo , Humanos , Immunoblotting , Análise de Componente Principal , Proteoma/metabolismo , Reprodutibilidade dos Testes , Moduladores de Tubulina/farmacologia , Proteína Tumoral 1 Controlada por Tradução
17.
Proteomics ; 10(7): 1494-504, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20127688

RESUMO

DJ-1 was originally identified to be an oncogenic product, but has later been shown to be highly multifunctional. DJ-1 plays a role in oxidative stress response and transcriptional regulation, and loss of its function leads to an early onset of Parkinsonism. To further understand the mechanisms behind DJ-1's role in cell survival and death, we investigated alternations in endogenous DJ-1 protein-protein interaction in apoptotic cells exposed to the phosphatase inhibitor okadaic acid. By combining cellular stable isotopic labelling of amino acids in cell culture, sub-cellular fractionation, co-immunoprecipitation, and MS, we identified a novel group of DJ-1 interaction partners that increased their association to DJ-1 in okadaic acid-exposed cells. These proteins were integral components of the Mi-2/nucleosome remodelling and deacetylase (NuRD) complex. Knockdown of DJ-1 and MTA2, a core component of the NuRD complex, had a similar and pro-apoptotic effect on the transcriptional- and p53-dependent cell death induced by daunorubicin. On the other hand, MTA2 knockdown had no significant effect on the progression of p53-independent okadaic acid-induced apoptosis. Our data suggest that the increased DJ-1/NuRD interaction is a general anti-stress response regulated by okadaic acid-induced modifications of DJ-1. The observed interaction between DJ-1 and the NuRD complex may give new clues to how DJ-1 can protect cells from p53-dependent cell death.


Assuntos
Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Complexo Mi-2 de Remodelação de Nucleossomo e Desacetilase/metabolismo , Proteínas Oncogênicas/metabolismo , Mapeamento de Interação de Proteínas/métodos , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Daunorrubicina/farmacologia , Regulação para Baixo/efeitos dos fármacos , Histona Desacetilase 1/metabolismo , Histona Desacetilases/metabolismo , Humanos , Ácido Okadáico/farmacologia , Proteína Desglicase DJ-1 , Proteínas Repressoras/metabolismo , Reprodutibilidade dos Testes , Proteína 4 de Ligação ao Retinoblastoma/metabolismo , Estresse Fisiológico , Proteína Supressora de Tumor p53/metabolismo
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