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1.
BMJ Qual Saf ; 24(3): 212-20, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25628428

RESUMO

INTRODUCTION: Improving the quality and activity of clinicians' practice improves patient care. Performance-related human resource management (HRM) is an established approach to improving individual practice but with limited use among clinicians. A framework for performance-related HRM was developed from successful practice in non-healthcare organisations centred on distributive leadership and locally provided, validated and interpreted performance measurement. This study evaluated the response of medical and non-clinical managers to its implementation into a large secondary healthcare organisation. METHODS: A semistructured qualitative questionnaire was developed from themes identified during framework implementation and included attitudes to previous approaches to measuring doctors' performance, and the structure and response to implementation of the performance-related HRM framework. Responses were analysed through a process of data summarising and categorising. RESULTS: A total of 29, from an invited cohort of 31, medical and non-clinical managers from departmental to executive level were interviewed. Three themes were identified: (1) previous systems of managing clinical performance were considered to be ineffective due to insufficient empowerment of medical managers and poor quality of available performance data; (2) the implemented framework was considered to address these needs and was positively received by medical and non-clinical managers; (3) introduction of performance-related HRM required the involvement of the whole organisation to executive level and inclusion within organisational strategy, structure and training. CONCLUSIONS: This study suggests that a performance-related HRM framework may facilitate the management of clinical performance in secondary healthcare, but is dependent on the design and methods of application used. Such approaches contrast with those currently proposed for clinicians in secondary healthcare in the UK and suggest that alternative strategies should be considered.


Assuntos
Atitude do Pessoal de Saúde , Avaliação de Desempenho Profissional/organização & administração , Administração de Recursos Humanos em Hospitais/métodos , Médicos , Centros de Cuidados de Saúde Secundários , Competência Clínica , Inglaterra , Humanos , Liderança , Qualidade da Assistência à Saúde , Medicina Estatal
2.
Future Hosp J ; 2(3): 166-170, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31098113

RESUMO

Introducing performance measurement and management of clinicians' practice may improve clinical productivity and quality of patient care; however the attitudes of doctors to such approaches are poorly defined. This was investigated through an anonymous qualitative postal questionnaire in a large district general hospital. A total of 93 from an invited cohort of 368 senior grade doctors participated. The results suggested that doctors understood the need to evaluate and manage their performance in medical practice, and address poor performance, but felt that current methods were inadequate. This principally related to poor validation and a lack of clinical ownership of data. The role of financial incentivisation was unclear but value was attributed to local clinical leadership, professional autonomy, recognition, and peer-group comparisons. This suggests that clinicians support the use of data-based performance measurement and management; however how it is undertaken is key to successful clinical engagement.

3.
BMC Health Serv Res ; 14: 566, 2014 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-25412841

RESUMO

BACKGROUND: Improved management of clinicians' time and practice is advocated to address increasing demands on healthcare provision in the UK National Health Service (NHS). Human resource management (HRM) is associated with improvements in organisational performance and outcomes within and outside of healthcare, but with limited use in managing individual clinicians. This may reflect the absence of effective and transferrable models. METHODS: The current systems of managing the performance of individual clinicians in a secondary healthcare organisation were reviewed through the study of practice in 10 successful partnership organisations, including knowledge worker predominant, within commercial, public and voluntary sector operating environments. Reciprocal visits to the secondary healthcare environment were undertaken. RESULTS: Six themes in performance related HRM were identified across the external organisations representing best practice and considered transferrable to managing clinicians in secondary care organisations. These included: performance measurement through defined outcomes at the team level with decision making through local data interpretation; performance improvement through empowered formal leadership with organisational support; individual performance review (IPR); and reward, recognition and talent management. The role of the executive was considered essential to support and implement effective HRM, with management of staff performance, behaviour and development integrated into organisational strategy, including through the use of universally applied values and effective communication. These approaches reflected many of the key aspects of high performance work systems and strategic HRM. CONCLUSIONS: There is the potential to develop systems of HRM of individual clinicians in secondary healthcare to improve practice. This should include both performance measurement and performance improvement but also engagement at an organisational level. This suggests that effective HRM and performance management of individual clinicians may be possible but requires an alternative approach for the NHS.


Assuntos
Atenção à Saúde/organização & administração , Gestão de Recursos Humanos/métodos , Médicos/organização & administração , Medicina Estatal/organização & administração , Eficiência Organizacional , Hospitais , Humanos , Liderança , Reino Unido
4.
J Crohns Colitis ; 8(1): 70-9, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23619007

RESUMO

BACKGROUND AND AIMS: The polyunsaturated fatty acids (PUFA) arachidonic acid (AA, n-6) and eicosapentaenoic acid (EPA, n-3) are precursors of eicosanoids and other lipid mediators which have critical roles in inflammation. The mediators formed from the different PUFA have different potencies. We hypothesised that metabolic changes associated with colonic mucosal inflammation would modify the bioavailability of the eicosanoid precursors AA and EPA. METHODS: Colonic mucosa biopsies were obtained from patients with ulcerative colitis and from matched controls. Inflammation was graded endoscopically and histologically. Esterified and non-esterified fatty acids were determined within the biopsies using gas chromatography-mass spectrometry and liquid chromatography-mass spectrometry, respectively. RESULTS: Biopsy samples were collected from 69 UC patients (54 providing both inflamed and non-inflamed mucosa) and 69 controls. Inflamed mucosa had higher AA (p<0.001) and lower EPA (p<0.010) contents and a higher AA:EPA ratio (p<0.001). Inflamed mucosa also had higher docosapentaenoic acid (DPA) and docosahexaenoic acid (DHA) and lower linoleic acid (LA) and α-linolenic acid (α-LNA) contents (all p<0.001), compared to non-inflamed and controls. There were significant correlations between severity of inflammation and contents of AA, DPA and DHA (positive correlations) and of LA, α-LNA and EPA (negative correlations). CONCLUSIONS: Higher AA, AA:EPA ratio, DPA and DHA and lower LA, α-LNA and EPA are seen in inflamed mucosa in UC and correlate with severity of inflammation. This suggests an alteration in fatty acid metabolism in the inflamed gut mucosa, which may offer novel targets for intervention and should be considered if nutritional strategies are used.


Assuntos
Colite Ulcerativa/metabolismo , Colo/metabolismo , Ácidos Graxos Ômega-3/farmacocinética , Ácidos Graxos Ômega-6/farmacocinética , Mucosa Intestinal/metabolismo , Adulto , Disponibilidade Biológica , Estudos de Casos e Controles , Colite Ulcerativa/patologia , Colo/patologia , Dieta , Esterificação , Ácidos Graxos Ômega-3/química , Ácidos Graxos Ômega-6/química , Feminino , Humanos , Mucosa Intestinal/patologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Índice de Gravidade de Doença , Inquéritos e Questionários
5.
PLoS One ; 8(10): e76532, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24204637

RESUMO

OBJECTIVES: Ulcerative colitis (UC) is a relapsing inflammatory disorder of unconfirmed aetiology, variable severity and clinical course, characterised by progressive histological inflammation and with elevation of eicosanoids which have a known pathophysiological role in inflammation. Therapeutic interventions targetting eicosanoids (5-aminosalicylates (ASA)) are effective first line and adjunctive treatments in mild-moderate UC for achieving and sustaining clinical remission. However, the variable clinical response to 5-ASA and frequent deterioration in response to cyclo-oxygenase (COX) inhibitors, has prompted an in depth simultaneous evaluation of multiple lipid mediators (including eicosanoids) within the inflammatory milieu in UC. We hypothesised that severity of inflammation is associated with alteration of lipid mediators, in relapsing UC. DESIGN: Study was case-control design. Mucosal lipid mediators were determined by LC-MS/MS lipidomics analysis on mucosal biopsies taken from patients attending outpatients with relapsing UC. Univariate and multivariate statistical analyses were used to investigate the association of mucosal lipid mediators, with the disease state and severity graded histologically. RESULTS: Levels of PGE2, PGD2, TXB2, 5-HETE, 11-HETE, 12-HETE and 15-HETE are significantly elevated in inflamed mucosa and correlate with severity of inflammation, determined using validated histological scoring systems. CONCLUSIONS: Our approach of capturing inflammatory mediator signature at different stages of UC by combining comprehensive lipidomics analysis and computational modelling could be used to classify and predict mild-moderate inflammation; however, predictive index is diminished in severe inflammation. This new technical approach could be developed to tailor drug treatments to patients with active UC, based on the mucosal lipid mediator profile.


Assuntos
Colite Ulcerativa/metabolismo , Colite Ulcerativa/patologia , Ácidos Graxos Insaturados/metabolismo , Mediadores da Inflamação/metabolismo , Mucosa Intestinal/metabolismo , Mucosa Intestinal/patologia , Corticosteroides/uso terapêutico , Adulto , Ácidos Aminossalicílicos/uso terapêutico , Araquidonato 5-Lipoxigenase/metabolismo , Biópsia , Estudos de Casos e Controles , Colite Ulcerativa/tratamento farmacológico , Ácidos Graxos Insaturados/química , Feminino , Humanos , Mediadores da Inflamação/química , Metabolismo dos Lipídeos , Masculino , Pessoa de Meia-Idade , Prostaglandina-Endoperóxido Sintases/metabolismo
6.
J Crohns Colitis ; 7(6): 481-9, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22974822

RESUMO

BACKGROUND: Ulcerative colitis (UC) is an inflammatory bowel disease with conflicting evidence from studies on the roles of TNFα, IL-8, TGFß and other cytokines and characterised by neutrophil infiltration and tissue destruction. AIM: To compare cytokine profiles of inflamed and non-inflamed mucosa in patients with distal UC, and matched controls. METHODS: Patients were prospectively recruited, mucosal biopsies at flexible sigmoidoscopy (FS) were taken from UC patients within macroscopically inflamed and non-inflamed proximal mucosa, and from age-sex matched controls undergoing FS. Endoscopic and histological inflammation was graded. Quantitative cytokine analysis for IL-4, TNFα, IL-17A, IL-8, IL-10, TGFß and IFNγ was carried out on tissue homogenates. Statistical comparison was by Wilcoxon signed rank pair analysis, Mann-Whitney U test and Spearman's correlation. RESULTS: 69 active UC patients (54 paired non-inflamed/inflamed mucosa) and 69 controls were compared. In inflamed mucosa, elevation in IL-8 and reduction in TGFß was measured compared with non-inflamed mucosa (p<0.001; p<0.02) and control mucosa (p<0.001; p<0.001); IL-8 was positively correlated (rs=0.481, p<0.01) and TGFß inversely correlated (rs=0.462; p<0.01) with grade of inflammation. TNFα concentration was not significantly different. Comparisons of inflamed with non-inflamed mucosa also demonstrate significant reduction in concentration of IFNγ (p<0.001), IL-4 (p<0.005) and IL-17A (p<0.002). CONCLUSION: Our findings suggest that IL-8 is elevated and TGFß is reduced in distal colitis. Lower concentration of IFNγ, IL-4 and IL-17A were also noted. TNFα levels were unchanged. These findings suggest that the inflammatory response in UC may predominantly involve IL-8 mediated neutrophil infiltration and failure of TGFß mediated tissue healing.


Assuntos
Colite Ulcerativa/metabolismo , Citocinas/metabolismo , Mucosa Intestinal/metabolismo , Adulto , Biópsia , Estudos de Casos e Controles , Colite Ulcerativa/tratamento farmacológico , Ensaio de Imunoadsorção Enzimática , Feminino , Glucocorticoides/uso terapêutico , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Índice de Gravidade de Doença
7.
Eur J Gastroenterol Hepatol ; 25(1): 44-55, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23011035

RESUMO

OBJECTIVE: To determine patient attitudes in gastroenterology outpatient care, including the preferences and expectations associated with satisfaction, waiting times and quality in the consultation. METHODS: A service evaluation of patient care in outpatient gastroenterology clinics was carried out using a composite, dedicated self-completed questionnaire; this included demographics, preconsultation and postconsultation Likert scale attitudes to process, interactive and environmental factors and a 16-point ranking questionnaire of domains of the patient pathway considered important to obtaining satisfaction. RESULTS: Two hundred and twenty-seven patients agreed to participate. The factors considered most important to obtaining satisfaction related to the quality of the consultation, including 'seeing the doctor', 'having confidence in the treatment plan', 'clear and appropriately set explanations', 'being listened to', 'opportunity to express important issues' and 'recognition of needs'. Low importance was attributed to process and environmental aspects including waiting times (appointment and waiting room), explanations for delays and the quietness and privacy of the consultation room, and involvement of the patient's next of kin. Patients reported dissatisfaction with long waiting times and short consultation times, but this did not appear to influence postconsultation satisfaction, the likelihood of reattendance or following the treatment plan. CONCLUSION: Patients consider that factors most important to a satisfactory experience in gastroenterology outpatient care relate specifically to the quality of their interaction with their healthcare professional in consultation. The roles of environmental and process issues are considered less important.


Assuntos
Assistência Ambulatorial , Gastroenterologia , Conhecimentos, Atitudes e Prática em Saúde , Avaliação de Processos e Resultados em Cuidados de Saúde , Satisfação do Paciente , Pacientes/psicologia , Indicadores de Qualidade em Assistência à Saúde , Encaminhamento e Consulta , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Agendamento de Consultas , Distribuição de Qui-Quadrado , Estudos Transversais , Inglaterra , Meio Ambiente , Feminino , Hospitais de Distrito , Hospitais Gerais , Humanos , Masculino , Pessoa de Meia-Idade , Preferência do Paciente , Inquéritos e Questionários , Fatores de Tempo , Adulto Jovem
8.
BMJ Qual Saf ; 21(1): 63-9, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21917646

RESUMO

BACKGROUND: Upper gastrointestinal (UGI) endoscopy is a routine healthcare procedure with a defined patient pathway. The objective of this study was to redesign this pathway for unsedated patients using lean thinking transformation to focus on patient-derived value-adding steps, remove waste and create a more efficient process. This was to form the basis of a pathway template that was transferrable to other endoscopy units. METHODS: A literature search of patient expectations for UGI endoscopy identified patient-derived value. A value stream map was created of the current pathway. The minimum and maximum time per step, bottlenecks and staff-staff interactions were recorded. This information was used for service transformation using lean thinking. A patient pathway template was created and implemented into a secondary unit. Questionnaire studies were performed to assess patient satisfaction. RESULTS: In the primary unit the patient pathway reduced from 19 to 11 steps with a reduction in the maximum lead time from 375 to 80 min following lean thinking transformation. The minimum value/lead time ratio increased from 24% to 49%. The patient pathway was redesigned as a 'cellular' system with minimised patient and staff travelling distances, waiting times, paperwork and handoffs. Nursing staff requirements reduced by 25%. Patient-prioritised aspects of care were emphasised with increased patient-endoscopist interaction time. The template was successfully introduced into a second unit with an overall positive patient satisfaction rating of 95%. CONCLUSION: Lean thinking transformation of the unsedated UGI endoscopy pathway results in reduced waiting times, reduced staffing requirements and improved patient flow and can form the basis of a pathway template which may be successfully transferred into alternative endoscopy environments with high levels of patient satisfaction.


Assuntos
Procedimentos Clínicos/normas , Endoscopia Gastrointestinal/normas , Satisfação do Paciente , Procedimentos Clínicos/organização & administração , Eficiência Organizacional , Endoscopia Gastrointestinal/métodos , Humanos , Garantia da Qualidade dos Cuidados de Saúde , Inquéritos e Questionários , Fatores de Tempo , Listas de Espera
9.
Frontline Gastroenterol ; 3(3): 172-179, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28839660

RESUMO

Inflammatory bowel disease (IBD) is associated with impairment of nutritional status both anthropometrically and biochemically, which results from both qualitative and quantitative changes in dietary intake alongside disease activity. Dietary intervention to replace deficiency is essential and may also be used to treat active disease and to reduce symptoms. The evidence for dietary interventions in this area is reviewed and the following recommendations made: ■Assessment of nutritional status is an essential part of the investigation of all patients with IBD and deficiency should be actively sought.■Any patient with macro- or micronutrient deficiency should be referred for dietetic assessment.■Micronutrient deficiency (most frequently iron, vitamin B12, folate and magnesium) should be replaced aggressively, parenterally if necessary.■Significant improvement in gastrointestinal symptoms can be achieved by low-residue diets (for stricturing disease) and (always under dietetic supervision) management of lactose and other intolerances.■Irritable bowel syndrome symptoms in patients with IBD can respond to low fermentable oligo-, di-, monosaccharide and polyol (FODMAP) diets, again this must be done under dietetic supervision.■Active Crohn's disease can be treated by exclusive enteral nutrition (elemental/polymeric/altered fat formulations all have equivalent efficacy).■Enteral nutrition can maintain remission in Crohn's disease and in this context can be given alongside normal oral intake.■Nutritional support does not have an established role in the treatment of active ulcerative colitis, other than in the management of malnutrition.■Total parenteral nutrition should not be used unless intestinal failure occurs.■There is insufficient evidence to support the routine use of Ω3 fish oil, prebiotics and glutamine in the treatment of active IBD.

11.
Br J Nutr ; 94(2): 253-61, 2005 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16115360

RESUMO

Crohn's disease is associated with altered bone turnover that may be influenced by nutritional status, the systemic inflammatory response, cytokine production by circulating (peripheral blood) mononuclear cells (PBMC) and antioxidant micronutrient intake. High-dose fish oil is associated with reductions in disease relapse and inflammatory markers, and modulates PBMC function. The effect of fish oil plus antioxidants on bone turnover and PBMC function (the production of interferon-gamma and prostaglandin E2) in Crohn's disease was investigated in a randomised-controlled trial. Patients with currently or recently raised biochemical markers of inflammation (C-reactive protein > or = 6.9 mg/l or erythrocyte sedimentation rate > or =18 mm/h) received fish oil (providing 2.7 g/d EPA and DHA) and antioxidants (vitamins A, C and E, and Se) (n 31) or placebo (n 30) for 24 weeks. Bone turnover was assessed by measuring the concentrations of urinary deoxypyridinoline (bone resorption) and serum osteocalcin (bone formation). Fish oil plus antioxidants were associated with increases in EPA, DHA Se in plasma (all P < 0.01), and with a reduction in interferon-gamma production by mitogen-stimulated PBMC, which demonstrated a negative correlation with deoxypyridinoline/creatinine:osteocalcin ratio (r - 0.33, P = 0.009). There were no differences between the groups at 24 weeks in the response of deoxypyridinoline or osteocalcin or their ratio, or in nutritional status. Dietary supplementation in Crohn's disease with high intakes of EPA and DHA, as fish oil, plus antioxidants was associated with a modulated production of interferon-gamma by PBMC but not altered indices of bone turnover.


Assuntos
Antioxidantes/administração & dosagem , Reabsorção Óssea/dietoterapia , Doença de Crohn/dietoterapia , Óleos de Peixe/administração & dosagem , Leucócitos Mononucleares/fisiologia , Osteogênese , Aminoácidos/urina , Antioxidantes/análise , Biomarcadores/metabolismo , Sedimentação Sanguínea , Reabsorção Óssea/etiologia , Reabsorção Óssea/metabolismo , Proteína C-Reativa/análise , Doença de Crohn/complicações , Doença de Crohn/fisiopatologia , Método Duplo-Cego , Ácidos Graxos Insaturados/sangue , Feminino , Humanos , Interferon gama/biossíntese , Masculino , Pessoa de Meia-Idade , Osteocalcina/sangue , Osteogênese/fisiologia , Vitaminas/administração & dosagem , Vitaminas/análise
12.
Am J Clin Nutr ; 80(5): 1137-44, 2004 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-15531659

RESUMO

BACKGROUND: Crohn disease (CD) is associated with osteoporosis and other extraintestinal manifestations that might be mediated by cytokines from circulating (peripheral blood) mononuclear cells (PBMCs). Fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) reduces disease activity in patients with CD with raised laboratory markers of inflammation and in healthy subjects alters PBMC function. OBJECTIVE: We investigated the effect of fish oil plus antioxidants on cytokine production by PBMCs from patients with CD with raised C-reactive protein concentrations (>/=6.9 mg/L) or erythrocyte sedimentation rates (>/=18 mm/h). DESIGN: A randomized placebo-controlled trial of fish oil (2.7 g EPA and DHA/d; n = 31) or placebo (olive oil; n = 31) for 24 wk was conducted in patients with CD. The fish-oil group additionally received an antioxidant preparation (vitamins A, C, and E and selenium). Exclusion criteria included corticosteroid use. Fatty acid composition was measured by gas chromatography. Production of tumor necrosis factor alpha, interferon gamma (IFN-gamma), and prostaglandin E(2) (PGE(2)) was measured by enzyme-linked immunosorbent assays after stimulation with mitogen and endotoxin (lipopolysaccharide). RESULTS: Fish-oil plus antioxidant dietary supplementation was associated with higher EPA and DHA incorporation into PBMCs (P < 0.001) and lower arachidonic acid (P = 0.006) and lower production of IFN-gamma by mitogen-stimulated PBMCs (P = 0.012) and of PGE(2) by lipopolysaccharide-stimulated PBMCs (P = 0.047). CONCLUSION: Dietary supplementation with fish oil plus antioxidants is associated with modified PBMC composition and lower production of PGE(2) and IFN-gamma by circulating monocytes or macrophages. The response of extraintestinal manifestations of CD should be investigated in a randomized controlled trial.


Assuntos
Antioxidantes/uso terapêutico , Doença de Crohn/tratamento farmacológico , Gorduras na Dieta/uso terapêutico , Óleos de Peixe/uso terapêutico , Leucócitos Mononucleares/efeitos dos fármacos , Prostaglandinas/biossíntese , Adulto , Antioxidantes/administração & dosagem , Doença de Crohn/metabolismo , Método Duplo-Cego , Feminino , Óleos de Peixe/administração & dosagem , Humanos , Leucócitos Mononucleares/metabolismo , Masculino , Pessoa de Meia-Idade , Pós-Menopausa , Pré-Menopausa
13.
Clin Nutr ; 23(4): 647-55, 2004 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-15297102

RESUMO

BACKGROUND & AIMS: Crohn's disease (CD) is associated with nutritional deficiencies, altered plasma concentrations of polyunsaturated fatty acids (PUFA) and an anti-inflammatory response to fish oil that contains n-3 PUFA. This suggests that, in CD, immune cells may have altered n-3 PUFA composition with functional consequences. The aim of this study is to investigate n-3 and n-6 PUFA composition and synthetic function of peripheral blood mononuclear cells (PBMC) in the basal state. METHODS: A case control study of 52 adult CD patients and healthy, age- and sex-matched controls. Composition of PBMC and plasma phospholipids were measured by gas chromatography and production of tumour necrosis factor-alpha, prostaglandin E2 (PGE2) and interferon-gamma (IFN-gamma) by PBMC were measured by ELISA. RESULTS: CD was associated with higher concentrations of eicosapentaenoic acid and other n-3 PUFA, and lower arachidonic acid (AA) (n-6 PUFA) in PBMC. This was not explained by differences in dietary fat intake. Lower rates of production of PGE2 and IFN-gamma by PBMC were noted in quiescent and active CD, respectively, compared to controls. CONCLUSIONS: CD is associated with a greater availability, and not a deficiency, of n-3 PUFA in PBMC, but lower concentrations of AA, and lower rates of production of PGE2 and IFN-gamma, compared to healthy controls.


Assuntos
Doença de Crohn/sangue , Gorduras Insaturadas na Dieta/farmacologia , Ácidos Graxos Ômega-3/farmacologia , Leucócitos Mononucleares/química , Leucócitos Mononucleares/metabolismo , Fosfolipídeos/sangue , Adulto , Antioxidantes/administração & dosagem , Antioxidantes/farmacologia , Estudos de Casos e Controles , Cromatografia Gasosa , Dinoprostona/biossíntese , Ensaio de Imunoadsorção Enzimática , Ácidos Graxos Ômega-3/administração & dosagem , Feminino , Óleos de Peixe , Humanos , Interferon gama/biossíntese , Masculino , Fator de Necrose Tumoral alfa/biossíntese
14.
Am J Clin Nutr ; 78(3): 376-82, 2003 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12936918

RESUMO

BACKGROUND: Prostaglandin E(2) (PGE(2)) inhibits lymphocyte proliferation and the production of interferon-gamma (IFN-gamma) by peripheral blood mononuclear cells, but the effect of PGE(2) on interleukin 4 (IL-4) production is unclear. Fish oil, which contains eicosapentaenoic and docosahexaenoic acids, inhibits production of PGE(2). The effects of fish oil on lymphocyte proliferation and production of IFN-gamma and IL-4 are unclear and may be influenced by the availability of antioxidants. OBJECTIVE: We investigated the effect of dietary fish oil with and without antioxidant cosupplementation on lymphocyte proliferation and the production of PGE(2), IFN-gamma, and IL-4 by peripheral blood mononuclear cells. DESIGN: Sixteen healthy men received dietary fish-oil supplements providing 0.3, 1, and 2 g eicosapentaenoic acid plus docosahexaenoic acid/d for 4 consecutive weeks each (total of 12 wk). All subjects were randomly assigned to daily cosupplementation with either antioxidants (200 microg Se, 3 mg Mn, 30 mg RRR-alpha-tocopheryl succinate, 90 mg ascorbic acid, 450 micro g vitamin A) or placebo. RESULTS: Fish-oil supplementation decreased PGE(2) production and increased IFN-gamma production and lymphocyte proliferation from baseline values. Cosupplementation with antioxidants did not affect cytokine production or lymphocyte proliferation. CONCLUSION: Dietary fish oil modulates production of IFN-gamma and lymphocyte proliferation in a manner consistent with decreased production of PGE(2), but this effect is not modified by antioxidant cosupplementation.


Assuntos
Antioxidantes/farmacologia , Suplementos Nutricionais , Dinoprostona/biossíntese , Óleos de Peixe/farmacologia , Ativação Linfocitária/efeitos dos fármacos , Células Th1/imunologia , Células Th2/imunologia , Adulto , Antioxidantes/administração & dosagem , Ácidos Docosa-Hexaenoicos/administração & dosagem , Ácidos Docosa-Hexaenoicos/farmacologia , Ácido Eicosapentaenoico , Ácidos Graxos Insaturados/administração & dosagem , Ácidos Graxos Insaturados/farmacologia , Óleos de Peixe/administração & dosagem , Humanos , Interleucina-4/biossíntese , Leucócitos Mononucleares/metabolismo , Masculino
15.
Eur J Gastroenterol Hepatol ; 14(5): 529-34, 2002 May.
Artigo em Inglês | MEDLINE | ID: mdl-11984151

RESUMO

OBJECTIVE: To clarify the relationship between childhood environment and the risk of subsequent development of Crohn's disease or ulcerative colitis. DESIGN AND OUTCOME MEASURES: A case-control study, assessing the risk of inflammatory bowel disease in relation to a series of historical and serological markers of childhood circumstance, analysed using the maximum likelihood form of conditional logistic regression. SETTING: District general hospital (secondary care institution). PARTICIPANTS: Subjects with Crohn's disease (n = 139) or ulcerative colitis (n = 137) aged between 16 and 45 years, each matched for sex and age with an outpatient control. RESULTS: Helicobacter seroprevalence was substantially reduced in Crohn's disease (OR 0.18; 95% CI, 0.06-0.52) but not in ulcerative colitis (OR 0.91; 95% CI, 0.38-2.16). In ulcerative colitis, a strong negative association with childhood appendectomy was confirmed (OR 0.05; 95% CI, 0.01-0.51). Crohn's disease was associated with childhood eczema (OR 2.81; 95% CI, 1.23-6.42) and the frequent use of a swimming pool (OR 2.90; 95% CI 1.21-6.91). There was no association between hepatitis A seroprevalence and either disease. CONCLUSION: The findings are consistent with the hypothesis that improved childhood living conditions are associated with increased risk of Crohn's disease. The study confirms that the negative association between appendectomy and ulcerative colitis relates primarily to events in childhood. Overall, the findings strongly support the assertion that childhood environment is an important determinant of the risk of inflammatory bowel disease in later life, with quite distinct risk factors for ulcerative colitis and Crohn's disease.


Assuntos
Colite Ulcerativa/epidemiologia , Doença de Crohn/epidemiologia , Adolescente , Adulto , Estudos de Casos e Controles , Criança , Exposição Ambiental , Feminino , Helicobacter pylori/isolamento & purificação , Humanos , Modelos Logísticos , Masculino , Fatores de Risco , Estudos Soroepidemiológicos , Inquéritos e Questionários
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