Some effects of melatonin and the control of its secretion in humans

Whether or not the pineal gland has a significant physiological role in humans is not known. There has nevertheless been speculation about the potential therapeutic use of melatonin (in view of its hypnotic and possible zeitgeber properties) in conditions such as insomnia and jet lag, and in shift-workers. Our work concerns the effects of melatonin administration in humans and the interactions between melatonin and other circadian variables. Chronic (one month), timed (1700 h), low-dose (2 mg daily) melatonin administration to normal subjects without environmental control consistently increased evening fatigue and slightly modified the 24 h prolactin rhythm without effect on cortisol, growth hormone, luteinizing hormone, thyroxine, testosterone or self-rated mood. In five out of 11 subjects the endogenous melatonin rhythm was advanced by one to three hours. During fractional desynchronization of circadian rhythms by increasing imposed 'day' length (26-29 h, 24 days, 500 lux), 5 mg melatonin per os at lights-out in two subjects resulted in better entrainment of the fatigue rhythm to the zeitgeber than in five out of six control subjects, without major consistent effects on other measured circadian variables. Using a new radioimmunoassay for 6-hydroxymelatonin sulphate (aMT6s), the major melatonin metabolite, we have shown that the urinary aMT6s rhythm is closely correlated to that of melatonin in plasma and is completely suppressed by an acute dose of atenolol (100 mg per os), a peripheral beta-adrenergic antagonist. During fractional desynchronization by increasing imposed 'day' length in one subject and decreasing imposed 'day' length in two subjects, the urinary aMT6s rhythm behaved similarly to that of core temperature. The results suggest that fatigue (or alertness) may be entrained by melatonin, but whether critical performance rhythms can be suitably manipulated remains to be clarified. It is likely that melatonin production is linked to the so-called 'strong' circadian oscillator.

Medullary thyroid cancer: targeting the RET kinase pathway with sorafenib/tipifarnib

Medullary thyroid carcinoma (MTC) is an uncommon malignancy of hereditary and sporadic presentation. Mutations in the RET proto-oncogene are involved in the pathogenesis of familial MTC and >50% of the sporadic cases. Currently, there is no effective treatment for recurrent or metastatic MTC. We report here a rapid response to a sorafenib (RET and RAF kinase and vascular endothelial growth factor receptor inhibitor)--based regimen in a patient with sporadic MTC who had advanced, progressive disease and a novel RET kinase aberration at exon 11 shown in tumor tissue.

Information provision for stroke patients and their caregivers

BACKGROUND

Research shows that stroke patients and their families are dissatisfied with the information provided and have a poor understanding of stroke and associated issues.

OBJECTIVES

To assess the effectiveness of information provision strategies in improving the outcome for stroke patients and/or their identified caregivers.

SEARCH STRATEGY

We searched the Cochrane Stroke Group Trials Register (last searched May 2007), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library Issue 1, 2007), MEDLINE (1966 to March 2007), EMBASE (1980 to March 2007), CINAHL (1982 to March 2007), PsycINFO (1974 to March 2007), Science Citation Index and Social Science Citation Index (1981 to March 2007), Assia (1987 to March 2007), Index to UK theses (1970 to March 2007), Dissertation Abstracts (1961 to March 2007), ongoing trials and research registers, bibliographies of retrieved papers, relevant articles and books, and the Journal of Advanced Nursing. We also contacted researchers for additional information.

SELECTION CRITERIA

Randomised trials involving patients or carers of patients with a clinical diagnosis of stroke or transient ischaemic attack (TIA) where an information intervention was compared with standard care, or where information and another therapy were compared with the other therapy alone.

DATA COLLECTION AND ANALYSIS

Two review authors independently assessed trial eligibility and methodological quality and extracted data. Primary outcomes were knowledge about stroke and stroke services, and impact on mood.

MAIN RESULTS

Seventeen trials involving 1773 patient and 1058 carer participants were included. Eight evaluated a passive and nine an active information intervention. Meta-analyses showed a significant effect in favour of the intervention on patient and carer knowledge, one aspect of patient satisfaction, and patient depression scores. There was no significant effect on number of cases of anxiety or depression in patients, carer mood or satisfaction, or death. Qualitative analyses found no strong evidence of an effect on other outcomes. Post-hoc subgroup analyses showed that active information had a significantly greater effect than passive information on patient mood but not on other outcomes.

AUTHORS' CONCLUSIONS

There is evidence that information improves patient and carer knowledge of stroke, aspects of patient satisfaction, and reduces patient depression scores. However, the reduction in depression scores was small and probably clinically insignificant. Although the best way to provide information is still unclear there is some evidence that strategies that actively involve patients and carers and include planned follow up for clarification and reinforcement have a greater effect on patient mood.

Factors influencing varicella zoster virus infection after allogeneic peripheral blood stem cell transplantation: low-dose acyclovir prophylaxis and pre-transplant diagnosis of lymphoproliferative disorders

Varicella zoster virus (VZV) infection is one of the frequent opportunistic infections after allogeneic bone marrow transplantation, with a high incidence of 30-50%. However, no data have been reported on VZV infection after allogeneic peripheral blood stem cell transplantation (PBSCT).

PATIENTS AND METHODS

We report a retrospective analysis of VZV infection in 192 allogeneic PBSCT recipients. Twenty-seven patients (14%) received long-term prophylaxis of low-dose acyclovir (200 mg twice daily orally > or =3 months) for recurrent oral (n=21) or genital herpes simplex virus infection (n=5) or for a previous history of recurrent VZV infection (n=1).

RESULTS

Forty-two patients (22%) developed VZV infections: localized (n=37) and disseminated infection (n=5). The incidence of VZV infection at 1 and 3 years was 19.3+/-3.3% and 36.8+/-5.2%, respectively. Complications included post-herpetic neuralgia (n=18, 43%), secondary bacterial infections (n=3), and intracranial hemorrhage (n=1) with 2 deaths. A higher risk factor for VZV infection was pre-transplant diagnosis of a lymphoproliferative disorder (LPD): chronic lymphocytic leukemia, Hodgkin's disease, or non-Hodgkin's lymphoma (P=0.021, 52.5% in LPD vs. 32.6% in non-LPD group). The use of low-dose acyclovir prophylaxis (P=0.043, 14.7% in acyclovir vs. 41.6% in nonacyclovir group) was found to be protective. Although no VZV infection episodes were noted during the period of acyclovir prophylaxis, 3 episodes of VZV infection were noted after acyclovir cessation.

CONCLUSION

The incidence of VZV infection after PBSCT was high at 36.8%, with patients transplanted for LPDs at higher risk. The long-term use of low-dose acyclovir may be protective for VZV infection, although it does not completely prevent rebound of late VZV infection.

Analysis of CD4+ T-cell gene expression in allergic subjects using two different microarray platforms

BACKGROUND

Allergic diseases are thought to involve dysregulated activation of T cells including CD4+ lymphocytes. T-cell activation results in changes in gene expression, but the optimal method to study gene expression profiles in T cells, and how this changes over time, are not known.

METHODS

Circulating CD4+ T cells were obtained from subjects with atopic asthma, nonatopic asthma or nonallergic controls, and total mRNA was rapidly isolated. Atopy was defined as positive skin prick test to one of nine allergens. Gene expression was analyzed using hybridization and Affymetrix oligonucleotide arrays (Hu133A and Hu133B chips, n = 84), or by reverse transcription-polymerase chain reaction (RT-PCR) with a pathway-targeted array (Human Th1-Th2-Th3 RT(2) Profiler PCR Array, Superarray, n = 16).

RESULTS

Using Affymetrix arrays, it was difficult to discern a dominant allergy-associated profile because of heterogeneity in gene expression profiles. In contrast, a Th2-like signature was evident using RT-PCR arrays with increased expression of expected genes (e.g. IL-4, 5, 9, and 13, all P < 0.05) as well as unexpected gene transcripts (e.g. osteopontin). Gene expression profiles were relatively stable over time in circulating CD4+ T cells from two subjects using both platforms.

CONCLUSIONS

Unstimulated CD4+ T cells isolated from allergic subjects express a characteristic profile of genes when analyzed using RT-PCR based microarrays.

Children's Voices: A Review of the Literature Pertinent to Looked-After Children's Views of Mental Health Services

Service-user involvement is an essential component of mental health service provision. This review aims to synthesise literature that has attempted to elicit children's experiences of mental health services with particular reference to looked-after children. The review is limited to qualitative research with study inclusion based on a synthesis of good quality criteria. Identification of gaps in the literature, directions for further research and implications for service developments are discussed.

Do standard measures of deprivation reflect health inequalities in older people?

The objective of the study is to examine the relationship between different deprivation indicators and both self-rated health and emergency admission rates of older people to determine which indicators best predict the health of people in this age group. The method employed an ecological study design using data from all 100 neighbourhoods in Sheffield in 2004 and analysing relationships in three age groups 50-64, 65-74 and over 75 years. Analysis was performed using Pearson correlation coefficient. For people aged 50-64 years, receipt of income support was the best predictor of poor self-reported health (R=0.85). For people aged 64-75 years, lack of formal educational qualifications showed the strongest relationship with poor health (R=0.88), although there was still a significantly strong relationship between poor self-rated health and both non-property ownership (R=0.8) and receipt of income support (R=0.7) in this age group. For people aged 75 years and over, lack of formal qualifications showed the strongest relationship (R=0.6, P<0.001). This was reinforced by a strong relationship between this indicator and emergency admission rates. In conclusion, caution should be used when using conventional deprivation/poverty measures to select older populations to be targeted for services. Our analysis has shown that the deprivation indicator that correlates best with the subjective health rating of people aged 75+ is educational qualification.

Use of octreotide acetate to prevent rebound hypoglycaemia in sulfonylurea overdose

A short cut review was carried out to establish whether octreotide can prevent rebound hypoglycaemia after sulfonylurea overdose. Fourteen papers were found using the reported searches, of which two presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these best papers are summarised in table 2. It is concluded that octreotide may be safe and effective in this situation.

Prediction of compliance and completion of orthodontic treatment: are quality of life measures important?

The main aim of the present investigation was to evaluate whether there is an association between completion of orthodontic treatment and quality of life measures, i.e. age, gender, socio-economic status, type of appliance and need for orthodontic treatment. The secondary aim was to evaluate whether compliance with orthodontic treatment (missed appointments and appliance breakages) was associated with age, gender, socio-economic status, or type of appliance. This was a multi-centre longitudinal observational study carried out on 144 patients (65 males and 79 females) aged 10-19 years. Baseline data were collected: patient age, gender, socio-economic status, Index of Orthodontic Treatment Need (IOTN), and type of appliance. Quality of life information, including orthodontic utility values and oral aesthetic subjective impact score (OASIS), were also collected at the start of treatment. The main outcome measure was whether a patient completed treatment. Compliance was assessed by recording the number of failed appointments and appliance breakages. Multiple regression analysis was used to investigate the association between independent and dependent variables. None of the baseline variables, including quality of life measures, were associated with a patient completing treatment, or their compliance with treatment (P > 0.05). Thus, quality of life measures (utility values or OASIS) do not add to our knowledge of who may complete, or co-operate with, orthodontic treatment. In addition, neither age, gender, socio-economic status nor clinical treatment need (IOTN) were useful in helping a clinician to choose potentially co-operative patients.

Patient benefits from participating in an integrated delivery system: impact on coordination of care

BACKGROUND

Although the presumption in health services literature has been that integrated delivery systems (IDSs) should improve the coordination of care, the benefits have not yet been well established through empirical research.

PURPOSES

This study assesses whether receiving care from providers who belong to the same IDS improves patient-perceived coordination of care; concurrently, we develop a new approach for assessing the performance of IDS.

METHODOLOGY/APPROACH

A study was conducted of 222 patients who received primary unilateral total knee arthroplasty at a large IDS' acute care hospital. To isolate the effects of provider membership, we enrolled patients who received surgery from the same surgical department in the same acute care hospital in the IDS. We used baseline and 6-week postoperation patient surveys to assess the impact of the participation of the patients' providers in the IDS on patient-perceived coordination of care.

FINDINGS

We found no consistent effects of IDS membership on patient-perceived coordination of care. Patients with in-network rehabilitation care experienced fewer problems than patients with out-of-network rehabilitation care did, while patients with in-network home care experienced more problems than patients with out-of-network home care did. Membership of a patient's primary care physician had no observed effects.

PRACTICE IMPLICATIONS

Health care managers and administrators need to undertake a realistic examination of the care-coordinating mechanisms that exist in their IDS. This study has shown that the integration of financial, contractual, and administrative processes is not enough to improve care from the patient's perspective; to improve care, it is advised that an IDS take a patient-centered approach in its design and implementation. We discuss potential reasons for uneven integration of IDS, particularly with respect to the lack of coordinating mechanisms, and argue for the usefulness of the approach developed here for assessing IDS performance over time.

Existe-t-il un consensus social pour définir et comprendre la problématique de la violence conjugale?

Pourquoi certaines relations de couple, initialement harmonieuses, basculent-elles dans des rapports de violence et d'abus ? Quelle est l'ampleur de ce type d'abus ? Plusieurs études se sont penché sur ce phénomène pour tenter d'en circonscrire l'incidence et d'en saisir la dynamique. Ces recherches semblent faire ressortir un phénomène social d'une ampleur non négligeable. Ainsi, selon une étude réalisée par MacLeod et Cadieux en 1980, une femme sur dix serait battue sur une base régulière. Selon Statistique Canada, en 1993, 25 % des femmes canadiennes mentionnent avoir été victimes de violence de la part d'un conjoint depuis l'âge de 16 ans. Parmi ce groupe, 15 % de ces femmes vivent toujours avec leur conjoint. De plus, en dépit des programmes d'aide aux victimes de violence conjugale, le nombre de cas de violence déclarés ne semble pas avoir diminué. Ces résultats alarmants ont amené plusieurs chercheurs à se pencher sur cette dynamique. Dans les dix dernières années, certains progrès ont ainsi été réalisés dans la compréhension du phénomène de la violence faite aux femmes. Des programmes d'intervention, l'implication des gouvernements, la judiciarisation de certaines formes d'abus, la sensibilisation accrue de la population face à la violence conjugale ainsi que la dénonciation des cas de violence ont marqué ces progrès. En dépit de cette conscience sociale accrue vis-à-vis ce phénomène, la recherche se bute parfois à des obstacles. En dépit de modélisations complexes des concepts et des facteurs de prédiction du phénomène, les résultats se montrent parfois décevants. Existe-t-il donc un consensus social pour définir cette problématique et la dynamique qui y est associée ? Nous tenterons de répondre à cette question en révisant les diverses approches théoriques utilisées pour définir la violence conjugale. Nous tenterons ensuite de faire une analyse critique de ces théories en examinant les diverses recherches empiriques qui ont été menées dans ce domaine.

The provision of communication aids to children in England: an analysis of applications to the Communication Aids Project

BACKGROUND

Children who experience difficulties in face-to-face interaction, understanding language and developing literacy can benefit from the provision of communication aids such as speech synthesizers and specialist software applications that support their social participation and learning. The Communication Aids Project (CAP) was a national initiative by the Department for Education and Skills in England, aimed at supporting and developing the provision of communication aids to children. This paper presents an analysis of the number and type of applications to CAP. In so doing, the paper begins to explore how the need for communication aids might be understood in England.

METHODS

The analysis was carried out on a database of 3060 anonymized records, representing applications to CAP between January 2002 and January 2004.

RESULTS

Applications to CAP were made on behalf of children with a broader range of disabilities than might be assumed, including a relatively high proportion of children with autistic spectrum disorder. Rates of application to CAP varied in line with Local Education Authority population size [e.g. total pupils, total pupils with special educational needs (SEN)], rather than indicators of regional variation in SEN provision (e.g. proportion of population identified as having SEN).

CONCLUSIONS

Within a context of changing services to children in England and increasing emphasis on the plurality and contestability of services, the relevance of these findings for service providers and service commissioners is discussed.

The clinical representativeness of couple therapy outcome research

The clinical representativeness of outcome studies is defined as the generalizability of recruitment processes, assessment/diagnostic procedures, treatment protocols, and therapeutic results from research settings to naturalistic treatment settings. The main goal of the present study was to examine the clinical representativeness of couple therapy in outcome studies. The data set was formed by 50 published clinical trials, including 34 couple therapy outcome studies for marital distress (CTMD) and 16 couple therapy outcome studies for comorbid relational and mental disorders (CTMD + C). The present findings showed that, overall, the clinical representativeness of couple therapy outcome studies is only fair (i.e., the mean global score is slightly lower than the midpoint of the rating scale used to assess representativeness). CTMD + C studies fared better than CTMD studies on many dimensions of clinical relevance. Studies in which pretherapy training was less intensive (for CTMD studies only), treatment was less structured, and therapists were more experienced showed larger effect sizes than those in which such was not the case.