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BACKGROUND: Validation studies have not been able to confirm the stage-specific understanding as operationalised in the readiness for return to work (RRTW) questionnaire. OBJECTIVE: To explore retrospectively how working female cancer survivors experienced the process of becoming ready to RTW during and beyond participation in an occupational rehabilitation intervention and thereby expand the understanding of the RRTW construct. METHODS: A qualitative research design was employed. Thirteen female cancer survivors were included for semi-structured interviews one to two years after they had completed active treatment and returned to work. The RRTW construct guided data generation and analysis. Content analysis was performed in four analytical steps that combined a concept-driven and a data-driven analytic strategy. RESULTS: Three themes were identified; "To have and then lose the safety net", "Realise a changed life situation", "Strive to balance work and everyday life". In a time span of approximately one to two years (from receiving treatment, being enrolled in an intervention and to gradually returning to work); the identified themes were interdependent of each other as one theme gradually evolved to the next theme in the process of engaging in sustained work participation. CONCLUSIONS: The present study points towards continuous development of the RRTW construct and whether the addition of a preparedness dimension would improve validity.
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Supervivientes de Cáncer , Neoplasias , Femenino , Humanos , Investigación Cualitativa , Estudios Retrospectivos , Reinserción al Trabajo , Encuestas y CuestionariosRESUMEN
Epidemiological studies suggest that consumption of potatoes is associated with increased risk of cardiometabolic diseases. However, few clinical trials have empirically tested this. The aim of this single-blind, randomised, crossover study was to evaluate the effect of daily potato consumption, compared with refined grains, on risk factors for cardiometabolic diseases. It was hypothesised that no difference in cardiometabolic endpoints would be detected between conditions, but diet quality would improve with potato consumption. Healthy participants on self-selected diets received one potato-based side dish or one refined grain-based side dish daily, for 4 weeks, separated by a minimum 2-week break. Dishes were isoenergetic, carbohydrate-matched and prepared without excess saturated fat or Na. Participants were instructed to consume the side dish with a meal in place of carbohydrates habitually consumed. Lipids/lipoproteins, markers of glycaemic control, blood pressure, weight and pulse wave velocity were measured at baseline and condition endpoints. Diet quality was calculated, based on 24-h recalls, using the Healthy Eating Index (HEI)-2015. Fifty adults (female n 34; age 40 (sd 13) years; BMI 24·5 (sd 3·6) kg/m2) completed the present study. No between-condition differences were detected for fasting plasma glucose (-0·05 mmol/l, 95 % CI -0·14, 0·04; P = 0·15), the primary outcome or any other outcomes. Compared with refined grains, the HEI-2015 score (3·5, 95 % CI 0·6, 6·4; P = 0·01), K (547 mg, 95 % CI 331, 764, P < 0·001) and fibre (2·4 g, 95 % CI 0·6, 4·2, P = 0·01) were higher following the potato condition. Consuming non-fried potatoes resulted in higher diet quality, K and fibre intake, without adversely affecting cardiometabolic risk.
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Glucemia , Culinaria , Dieta/normas , Glucosa/metabolismo , Solanum tuberosum , Adulto , Biomarcadores , Estudios Cruzados , Femenino , Humanos , Masculino , Persona de Mediana EdadRESUMEN
Purpose The purpose of this study was to explore how employers and co-workers experience the return to work (RTW) process of employees undergoing cancer treatment. Methods Sixteen semi-structured individual interviews and participant observations at seven workplaces took place, involving seven employers and nine co-workers with different professions. A phenomenological-hermeneutic analytic approach was applied involving coding, identification of themes, and interpretation. Results We identified three employer themes: call for knowledge, Making decisions, and Feeling helpless. Also, three co-worker themes were identified: understanding and sympathy, extra work and burden, and Insecurity about future work tasks. Early initiated RTW, e.g. less work hours and work accommodations, did neither constitute challenges for employers nor co-workers in the beginning of the RTW process. However, when the RTW process was prolonged employers encountered difficulties in finding suitable work tasks, whereas co-workers were burdened by extra work. Conclusions Overall, cancer survivors' RTW process was welcomed and encouraged at the workplace level. However, employer and co-worker experiences suggested that RTW initiation parallel with cancer treatment raised challenges at the workplace level, when the RTW process was extended beyond the initial RTW plan; increased workload and difficulties in balancing the needs of the cancer survivor and co-workers. Mechanisms that support cancer survivors' RTW without introducing strain on co-workers should be investigated in future research. Furthermore, support for employers in their RTW management responsibilities needs to be addressed in general and in particular in future RTW interventions.
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Neoplasias/psicología , Reinserción al Trabajo/psicología , Lugar de Trabajo/organización & administración , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Neoplasias/rehabilitación , Servicios de Salud del Trabajador/organización & administración , Investigación Cualitativa , Lugar de Trabajo/psicologíaRESUMEN
BACKGROUND AND AIMS: The relationship between dietary intake and carotid intima media thickness (IMT) and pulse wave velocity (PWV) in individuals with type 1 and type 2 diabetes has not been well studied. We investigated the association between dietary intake and common carotid artery intima media thickness (CCA IMT) and PWV in a cohort with type 1 and type 2 diabetes. METHODS AND RESULTS: A one-year randomised controlled trial was conducted to investigate the effect of improving dietary quality on CCA IMT. These subjects were followed up again approximately 12 months after the completion of the trial (i.e. approximately 24 month since baseline). The study cohort included 87 subjects that had dietary intake and CCA IMT measured at baseline and after a mean of 2.3 years' follow-up. PWV was measured in a subsample of this cohort. Age and baseline mean CCA IMT were strongly associated with mean CCA IMT at 24 months. After adjustment for age and baseline mean CCA IMT, baseline consumption of carbohydrate (r = -0.28; p = 0.01), sugars (r = -0.27; p = 0.01), fibre (r = -0.26; p = 0.02), magnesium (r = -0.25; p = 0.02) and the Alternate Health Eating Index (AHEI) score (r = -0.23; p = 0.03) were inversely associated with mean CCA IMT at 24 months. Mixed linear modelling showed an interaction between mean CCA IMT and AHEI at baseline (p = 0.024). Those who were in the highest AHEI tertile at baseline had greater CCA IMT regression at 24 months compared to those in the lowest tertile, after adjustment for baseline age, BMI, smoking pack years, time since diabetes diagnosis, and mean arterial pressure at baseline (mean -0.043 mm; 95% CI -0.084, -0.003; p = 0.029). CONCLUSIONS: In this prospective analysis greater diet quality at baseline, as measured by the AHEI, was associated with greater CCA IMT regression after approximately two years. This suggests that greater diet quality is associated with better longer term vascular health in individuals with type 1 and type 2 diabetes.
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Enfermedades de las Arterias Carótidas/prevención & control , Grosor Intima-Media Carotídeo , Diabetes Mellitus Tipo 1/dietoterapia , Diabetes Mellitus Tipo 2/dietoterapia , Dieta Saludable , Valor Nutritivo , Conducta de Reducción del Riesgo , Anciano , Enfermedades de las Arterias Carótidas/diagnóstico por imagen , Enfermedades de las Arterias Carótidas/etiología , Diabetes Mellitus Tipo 1/complicaciones , Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/diagnóstico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Estudios Prospectivos , Medición de Riesgo , Factores de Riesgo , Factores de Tiempo , Resultado del TratamientoRESUMEN
To explore in-depth understanding of providers' experiences when involved in a return-to-work (RTW) intervention offered during cancer treatment. Semi-structured individual interviews and participant observations at a hospital department and two municipal job centers were carried out, including ten providers (physicians, nurses and social workers). A phenomenological-hermeneutic approach was applied, involving coding, identification of themes and interpretation of findings. Three major themes were identified: Treatment first, Work as an integrated component in cancer rehabilitation, and Challenges in bringing up work issues. Differences in providers' experiences of the RTW intervention offered to cancer patients were found: in the hospital setting RTW was a second priority, whereas in the municipality job centers it was an integrated component. Further studies are needed to investigate how and when occupational rehabilitation services can be implemented across sectors to support cancer patients' RTW. In the future, work issues ought to be systematically presented by providers across sectors as early as possible to support cancer patients' RTW. Cancer patients' individual needs and thoughts about RTW are to be identified by both health care providers during treatment and social workers at the municipality level and shared across sectors.
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Actitud del Personal de Salud , Neoplasias/rehabilitación , Rehabilitación Vocacional , Reinserción al Trabajo , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Investigación Cualitativa , Apoyo SocialRESUMEN
BACKGROUND: Returning to work (RTW) after long-term sickness absence is a challenge for convalescent workers, co-workers, managers and organizations. Few studies have investigated the post-return phase after long-term sickness absence. AIMS: To investigate the RTW process as experienced by returning workers, co-workers and managers at an emergency care service and a waste disposal company, exploring various perspectives related to early RTW before full recovery and changes in the returning workers' work positions. METHODS: An ethnographic field work design was employed. Returning workers with musculoskeletal disorders, co-workers and managers at two different workplaces participated in individual and group interviews and underwent participant observation over 5 months. These were repeated in a 2-week period after a 4-month interval. Grounded theory analysis was used to identify themes of importance. RESULTS: Four main themes were identified: (1) return before full recovery, (2) changes in work tasks, (3) changes in work position and (4) individual responsibility. CONCLUSIONS: Our results illustrate how returning workers, co-workers and managers at two workplaces experienced the RTW process. The results highlight some of the challenges that occur when returning at an early stage before full recovery is obtained leading to changes in the returning worker's work position.
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Enfermedades Musculoesqueléticas/complicaciones , Reinserción al Trabajo/psicología , Ausencia por Enfermedad , Factores de Tiempo , Lugar de Trabajo/psicología , Antropología Cultural/métodos , Humanos , Masculino , Persona de Mediana Edad , Enfermedades Musculoesqueléticas/etiología , Investigación Cualitativa , Recuperación de la FunciónRESUMEN
Advanced age is associated with increased incidence of a variety of chronic disease states which share oxidative stress and inflammation as causative role players. Furthermore, data point to a role for both cumulative oxidative stress and low grade inflammation in the normal ageing process, independently of disease. Therefore, arguably the best route with which to address premature ageing, as well as age-associated diseases such as diabetes, cardiovascular disease, and dementia, is preventative medicine aimed at modulation of these two responses, which are intricately interlinked. In this review, we provide a detailed account of the literature on the communication of these systems in the context of ageing, but with inclusion of relevant data obtained in other models. In doing so, we attempted to more clearly elucidate or identify the most probable cellular or molecular targets for preventative intervention. In addition, given the absence of a clear pharmaceutical solution in this context, together with the ever-increasing consumer bias for natural medicine, we provide an overview of the literature on grape (Vitis vinifera) derived products, for which beneficial effects are consistently reported in the context of both oxidative stress and inflammation.
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Envejecimiento/metabolismo , Estrés Oxidativo , Vitis , Envejecimiento/patología , Animales , Humanos , Inflamación/metabolismo , Inflamación/patologíaRESUMEN
AIM: To conduct a systematic review and meta-analysis of clinical trials involving adults, to determine the effect of weight loss induced by energy restriction with or without exercise, anti-obesity drugs or bariatric surgery on measures of arterial stiffness and compliance. METHODS: A systematic search of Pubmed, EMBASE, MEDLINE and the Cochrane Library was conducted to find intervention trials (randomised/non-randomised) that aimed to achieve weight loss and included the following outcome measures: cardio-ankle vascular index (CAVI), direct measures of area/diameter related to pressure change (including ß-stiffness index, brachial or carotid artery compliance, aortic, carotid or brachial artery distensibility and strain), measures derived from peripheral pulse wave analysis (including augmentation index, augmentation pressure, distal oscillatory, proximal capacitive and systemic compliance) and pulse pressure. Data were analysed using Comprehensive Meta Analysis V2 using random effects analysis. Standardised mean difference (SMD) is reported with negative values indicating an improvement. RESULTS: A total of 43 studies, involving 4231 participants, were included in the meta-analysis. Mean weight loss was approximately 11% of initial body weight. Weight loss improved CAVI (SMD -0.48; p = 0.04), ß-stiffness index (SMD = -0.98; p = 0.001), arterial compliance (SMD = -0.61; p = 0.0001) and distensibility (SMD -1.10; p = 0.005), distal oscillatory compliance (SMD = -0.41; p = 0.03), proximal capacitive compliance (SMD -0.66; p = 0.009), systemic arterial compliance (SMD -0.71; p = 0.003) and reflection time (SMD -0.51; p = 0.001). Augmentation index, strain, augmentation pressure and pulse pressure were not significantly changed with weight loss. CONCLUSION: Weight loss induced by energy restriction improves some measures of arterial compliance and stiffness.
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Restricción Calórica , Dieta Reductora , Metabolismo Energético , Obesidad/dietoterapia , Enfermedades Vasculares/prevención & control , Rigidez Vascular , Pérdida de Peso , Adaptabilidad , Humanos , Obesidad/complicaciones , Obesidad/diagnóstico , Obesidad/fisiopatología , Recuperación de la Función , Factores de Riesgo , Resultado del Tratamiento , Enfermedades Vasculares/diagnóstico , Enfermedades Vasculares/etiología , Enfermedades Vasculares/fisiopatologíaRESUMEN
OBJECTIVE: To determine the dietary predictors of central blood pressure, augmentation index and pulse wave velocity (PWV) in subjects with type 1 and type 2 diabetes. METHODS: Participants were diagnosed with type 1 or type 2 diabetes and had PWV and/or pulse wave analysis performed. Dietary intake was measured using the Dietary Questionnaire for Epidemiological Studies Version 2 Food Frequency Questionnaire. Serum lipid species and carotenoids were measured, using liquid chromatography electrospray ionization-tandem mass spectrometry and high performance liquid chromatography, as biomarkers of dairy and vegetable intake, respectively. Associations were determined using linear regression adjusted for potential confounders. RESULTS: PWV (n = 95) was inversely associated with reduced fat dairy intake (ß = -0.01; 95% CI -0.02, -0.01; p = 0 < 0.05) in particular yoghurt consumption (ß = -0.04; 95% CI -0.09, -0.01; p = 0 < 0.05) after multivariate adjustment. Total vegetable consumption was negatively associated with PWV in the whole cohort after full adjustment (ß = -0.04; 95% CI -0.07, -0.01; p < 0.05). Individual lipid species, particularly those containing 14:0, 15:0, 16:0, 17:0 and 17:1 fatty acids, known to be of ruminant origin, in lysophosphatidylcholine, cholesterol ester, diacylglycerol, phosphatidylcholine, sphingomyelin and triacylglycerol classes were positively associated with intake of full fat dairy, after adjustment for multiple comparisons. However, there was no association between serum lipid species and PWV. There were no dietary predictors of central blood pressure or augmentation index after multivariate adjustment. CONCLUSION: In this cohort of subjects with diabetes reduced fat dairy intake and vegetable consumption were inversely associated with PWV. The lack of a relationship between serum lipid species and PWV suggests that the fatty acid composition of dairy may not explain the beneficial effect.
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Diabetes Mellitus Tipo 1/epidemiología , Diabetes Mellitus Tipo 2/epidemiología , Angiopatías Diabéticas/epidemiología , Dieta , Rigidez Vascular , Adulto , Anciano , Biomarcadores/sangre , Carotenoides/sangre , Cromatografía Líquida de Alta Presión , Estudios Transversales , Productos Lácteos , Diabetes Mellitus Tipo 1/sangre , Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 1/terapia , Diabetes Mellitus Tipo 2/sangre , Diabetes Mellitus Tipo 2/diagnóstico , Diabetes Mellitus Tipo 2/fisiopatología , Diabetes Mellitus Tipo 2/terapia , Angiopatías Diabéticas/sangre , Angiopatías Diabéticas/diagnóstico , Angiopatías Diabéticas/fisiopatología , Angiopatías Diabéticas/prevención & control , Dieta/efectos adversos , Dieta con Restricción de Grasas , Grasas de la Dieta/sangre , Conducta Alimentaria , Femenino , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Análisis Multivariante , Evaluación Nutricional , Estado Nutricional , Análisis de la Onda del Pulso , Factores de Riesgo , Conducta de Reducción del Riesgo , Espectrometría de Masa por Ionización de Electrospray , Encuestas y Cuestionarios , Espectrometría de Masas en Tándem , Verduras , Victoria/epidemiologíaRESUMEN
BACKGROUND AND AIMS: Increased potassium intake is related to reduced blood pressure (BP) and reduced stroke rate. The effect of increased dietary potassium on endothelial function remains unknown. The aim was to determine the effect of increased dietary potassium from fruit and vegetables on endothelial function. METHODS AND RESULTS: Thirty five healthy men and women (age 32 ± 12 y) successfully completed a randomised cross-over study of 2 × 6 day diets either high or low in potassium. Flow mediated dilatation (FMD), BP, pulse wave velocity (PWV), augmentation index (AI) and a fasting blood sample for analysis of Intercellular Adhesion Molecule-1 (ICAM-1), E-selectin, asymmetric dimethylarginine (ADMA) and endothelin-1 were taken on completion of each intervention. Dietary change was achieved by including bananas and potatoes in the high potassium and apples and rice/pasta in the low potassium diet. Dietary adherence was assessed using 6 day weighed food diaries and a 24 h urine sample. The difference in potassium excretion between the two diets was 48 ± 32 mmol/d (P = 0.000). Fasting FMD was significantly improved by 0.6% ± 1.5% following the high compared to the low potassium diet (P = 0.03). There were no significant differences in BP, PWV, AI, ICAM-1, ADMA or endothelin-1 between the interventions. There was a significant reduction in E-selectin following the high (Median = 5.96 ng/ml) vs the low potassium diet (Median = 6.24 ng/ml), z = -2.49, P = 0.013. CONCLUSION: Increased dietary potassium from fruit and vegetables improves FMD within 1 week in healthy men and women but the mechanisms for this effect remain unclear. CLINICAL TRIAL REGISTRY: ACTRN12612000822886.
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Endotelio Vascular/efectos de los fármacos , Potasio en la Dieta/administración & dosificación , Adolescente , Adulto , Anciano , Arginina/análogos & derivados , Arginina/sangre , Glucemia/metabolismo , Presión Sanguínea/efectos de los fármacos , Índice de Masa Corporal , Estudios Cruzados , Selectina E/sangre , Endotelina-1/sangre , Femenino , Frutas , Voluntarios Sanos , Humanos , Molécula 1 de Adhesión Intercelular/sangre , Masculino , Persona de Mediana Edad , Cooperación del Paciente , Análisis de la Onda del Pulso , Método Simple Ciego , Urinálisis , Verduras , Adulto JovenRESUMEN
Effective strategies are needed to help individuals lose weight and maintain weight loss. The primary aim of this study was to investigate the effect of intermittent energy restriction (IER) compared to continuous energy restriction (CER) on weight loss after 8 weeks and weight loss maintenance after 12 months. Secondary aims were to determine changes in waist and hip measurements and diet quality. In a randomized parallel study, overweight and obese (body mass index [BMI] ≥ 27 kg m(-2)) women were stratified by age and BMI before randomization. Participants undertook an 8-week intensive period with weight, waist and hip circumference measured every 2 weeks, followed by 44 weeks of independent dieting. A food frequency questionnaire was completed at baseline and 12 months, from which diet quality was determined. Weight loss was not significantly different between the two groups at 8 weeks (-3.2 ± 2.1 kg CER, n = 20, -2.0 ± 1.9 kg IER, n = 25; P = 0.06) or at 12 months (-4.2 ± 5.6 kg CER, n = 17 -2.1 ± 3.8 kg IER, n = 19; P = 0.19). Weight loss between 8 and 52 weeks was -0.7 ± 49 kg CER vs. -1 ± 1.1 kg IER; P = 0.6. Waist and hip circumference decreased significantly with time (P < 0.01), with no difference between groups. There was an increase in the Healthy Eating Index at 12 months in the CER compared with the IER group (CER 8.4 ± 9.1 vs. IER -0.3 ± 8.4, P = 0.006). This study indicates that intermittent dieting was as effective as continuous dieting over 8 weeks and for weight loss maintenance at 12 months. This may be useful for individuals who find CER too difficult to maintain.
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Restricción Calórica , Obesidad/dietoterapia , Pérdida de Peso , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Obesidad/metabolismo , Obesidad/fisiopatologíaRESUMEN
AIMS: To review: 1) the correlation between individual dietary components and carotid intima media thickness (cIMT); 2) the relationship between dietary patterns and cIMT; 3) the effect of dietary interventions on cIMT progression. DATA SYNTHESIS: An electronic search for epidemiological and intervention trials investigating the association between dietary components or patterns of intake and cIMT was performed in PUBMED, EMBASE and the Cochrane Library. Epidemiological data shows that a higher intake of fruit, wholegrains and soluble fibre and lower consumption of saturated fat in favour of polyunsaturated fat is associated with lower cIMT. In people at high risk of cardiovascular disease >93 g/day of fruit is associated with lower cIMT. Lower cIMT has also been observed when >0.79 serves/day of wholegrains and >25 g/day of fibre, predominately in the soluble form is consumed. Saturated fat is positively associated with cIMT, for every 10 g/day increase in saturated fat cIMT is 0.03 mm greater. Olive oil is inversely associated with cIMT, with a benefit seen when >34 g/day is consumed. While there are many epidemiological studies exploring the association between dietary intake and cIMT there are few intervention studies. Intervention studies show that a Mediterranean diet may reduce cIMT progression, especially in those with a higher cIMT. CONCLUSIONS: A Mediterranean style dietary pattern, which is high in fruits, wholegrains, fibre and olive oil and low in saturated fat, may reduce carotid atherosclerosis development and progression. However further research from randomised controlled trials is required to understand the association between diet and cIMT and the underlying mechanisms.
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Grosor Intima-Media Carotídeo , Conducta Alimentaria , Enfermedades de las Arterias Carótidas/prevención & control , Productos Lácteos/análisis , Bases de Datos Factuales , Dieta Mediterránea , Dieta Reductora , Grasas de la Dieta/administración & dosificación , Fibras de la Dieta/administración & dosificación , Progresión de la Enfermedad , Grano Comestible/química , Frutas/química , Humanos , Metaanálisis como Asunto , Estudios Observacionales como Asunto , Fitosteroles/administración & dosificación , Potasio en la Dieta/administración & dosificación , Ensayos Clínicos Controlados Aleatorios como Asunto , Factores de Riesgo , Sodio en la Dieta/administración & dosificación , Glycine max/química , Verduras/químicaRESUMEN
Adult male asparagus flies exhibit typical calling behaviors (suggestive of pheromone production) during which they emit a single volatile compound that was identified as isopropyl (S)-5-hydroxyhexanoate. In laboratory bioassays, synthetic samples elicited an arrestant response in females, but did not appear to attract females. On the other hand, the synthetic material attracted conspecific males in olfactometer bioassays.
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Dípteros/química , Aceites Volátiles/aislamiento & purificación , Atractivos Sexuales/química , Conducta Sexual Animal , Factores de Edad , Animales , Bioensayo , Dípteros/fisiología , Femenino , Hexanoles/aislamiento & purificación , Masculino , Atractivos Sexuales/farmacología , Factores de TiempoRESUMEN
Our studies in chronic lymphocytic leukemia (CLL) are directed at understanding which signals maintain viability in vivo and become lost upon removal of leukemic cells from the body, such that they immediately begin to undergo apoptosis ex vivo. In this report, we examine changes in gene expression observed between freshly isolated CLL B cells and after maintenance in vitro with and without Fludara. We compare these effects with an Epstein-Barr virus (EBV)-transformed cell line treated similarly. Kinetic effects of drug treatment on apoptosis and cell division were examined with DNA laddering, radioisotopic labeling, and flow cytometry using the fluorescent dye carboxyfluorescein diacetate succinimidyl ester. Reverse transcriptase polymerase chain reaction and hybridization blots of microarray cDNA analyses were performed to examine gene expression. We demonstrate that many genes, especially cyclin D1, were downregulated after culture of CLL cells. Anti-apoptotic genes BAG-1 and Akt2 were upregulated. The greatest positive effect with Fludara was the upregulation of JNK1. The EBV-transformed cell line was resistant to classic DNA laddering induced with Fludara. Although DNA synthesis was blocked, the EBV-transformed cell line had some ability to recover from treatment following drug washout. CLL cells express cell cycle regulatory genes that are specific for activated cells in the G(1)-S phase of the cell cycle. Growth regulatory signals are lost when the leukemic cells are isolated from the body. Fludara enhances kinetics of apoptosis and induces expression of a gene responsive to stress that regulates expression of a kinase involved in initiation of the apoptotic pathway.
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Antimetabolitos Antineoplásicos/farmacología , Apoptosis/genética , Regulación Neoplásica de la Expresión Génica , Leucemia Linfocítica Crónica de Células B/genética , Fosfato de Vidarabina/análogos & derivados , Antimetabolitos Antineoplásicos/uso terapéutico , Apoptosis/efectos de los fármacos , Transformación Celular Viral , Herpesvirus Humano 4 , Humanos , Leucemia Linfocítica Crónica de Células B/tratamiento farmacológico , Leucemia Linfocítica Crónica de Células B/patología , Células Tumorales Cultivadas , Fosfato de Vidarabina/farmacologíaRESUMEN
This article presents the results of two investigations, each measuring cellular immune function on 3 investigation days 1 week apart in 15 high and 15 low hypnotizable healthy subjects randomly selected for three groups: (1) a guided imagery group receiving instructions to enhance cellular immune function: (2) a relaxation group which did not receive instructions regarding the immune system, and (3) a control group. Study 1 investigated changes in monocyte chemotaxis (MC) and lymphocyte proliferative response (LPR) to three mitogens, while natural killer cell activity (NKCA) was measured in study 2. The results show similar patterns of brief decreases in LPR and NKCA immediately after intervention on all investigation days in both the imagery and relaxation groups. Increases in MC were found in both intervention groups on day 1. On a follow-up investigation day in study 2, a brief stress task yielded a slight increase in NKCA. In study 2, the control group showed decreases in NKCA similar to those observed in the two intervention groups. In general there were no significant changes in preintervention immune function throughout the investigation period. When comparing the effects in high and low hypnotizable subjects, we found that high hypnotizables showed greater decreases in LPR and NKCA than low hypnotizables. There are several inconsistencies between the results of the limited number of investigations studying the effects of guided imagery and relaxation on immune function. These differences may in part be explained by differences in methodology, time intervals between blood sampling, and subject characteristics such as age, health status and hypnotizability. The inconsistent results make it premature to make inferences about possible benefits of the application of these techniques in the treatment of immune related diseases, and further investigations are needed.