Role of neighbourhood social characteristics in children's use of mental health services between ages 9 and 13 years: a population-based cohort study in the Netherlands.

OBJECTIVES: This study aims to investigate the association of neighbourhood socioeconomic status (SES) and social cohesion (SC) within the neighbourhood with mental health service use in children, independent of individual-level characteristics and mental health problems. DESIGN, SETTING AND PARTICIPANTS: A longitudinal analysis was done using data from the Generation R Study, a prospective, population-based cohort of children born in Rotterdam, the Netherlands. These data were linked to the Neighbourhood Profile, containing registry and survey data on residents of Rotterdam. Data of 3403 children (mean age: 13.6 years, SD: 0.4) were used to study the associations between neighbourhood SES, SC (SC belonging and SC relations) and mental health service use, adjusted for mental health problems and sociodemographic characteristics. OUTCOME MEASURES: Mental health service use was reported by the accompanying parent at the research centre using the question: 'Did your child visit a psychologist or psychiatrist between 9 and 13 years old?'. RESULTS: Mental health services were used by 524 (15.4%) children between ages 9 and 13 years. No significant differences in mental health service use between neighbourhoods were identified (median OR: 1.07 (p=0.50)). The neighbourhood social characteristics were associated with mental health service use, but only when adjusted for each other. Children living in neighbourhoods with a low SES (OR 0.57 (95% CI 0.32 to 1.00)) or high SC belonging (OR 0.79 (95% CI 0.64 to 0.96)) were less likely to use services compared with children in a high SES or low SC belonging neighbourhood. SC relations was not associated with mental health service use. CONCLUSIONS: Our findings indicate that children living in high SES neighbourhoods or in neighbourhoods where people feel less sense of belonging are more likely to use mental health services. As these associations were only present when studied jointly, more research is warranted on the complex associations of neighbourhood factors with children's mental health service use.

Monitoring of inosine monophosphate dehydrogenase activity in mononuclear cells of children with acute lymphoblastic leukemia: enzymological and clinical aspects.

BACKGROUND: Inosine 5'-monophosphate dehydrogenase (IMPDH; EC1.1.1.205) catalyzes the rate-limiting step in guanine nucleotide biosynthesis, and may play an important role in treatment of patients with antipurines. METHODS: We used an HPLC method to measure the IMPDH activity in peripheral blood and bone marrow mononuclear cells (MNC). IMPDH activities were determined in children who were diagnosed with and treated for acute lymphoblastic leukemia (ALL), and in a group of control children. RESULTS: The median IMPDH activity for control children was 350 pmol/10(6) pMNC/hr (range 97-896; n = 47). No gender or age differences were observed. IMPDH activity at diagnosis of ALL was correlated with the percentage of peripheral blood lymphoblasts (r = 0.474; P < 0.001; n = 71). The median IMPDH activity at diagnosis was 410 pmol/10(6) pMNC/hr (range 40-2009; n = 76), significantly higher than for controls (P = 0.012). IMPDH activity significantly decreased after induction treatment, and during treatment with methotrexate (MTX) infusions (median 174 pmol/10(6) pMNC/hr; range 52-516; n = 21). The activity remained low during maintenance treatment with 6-mercaptopurine (6MP) and MTX, at a significantly lower level than for controls (P < 0.004). One year after cessation of treatment IMPDH activity returned to normal values. CONCLUSION: The decrease of IMPDH activity at remission of ALL seems to be at least partly due to the eradication of lymphoblasts with the type 2 isoform of the enzyme.

Nanomolar level of resveratrol (trans-3,5,4'-trihydroxystilbene) is required, but is not sufficient, to inhibit the growth of human monocytoid tumor cells through an apoptotic-like mechanism.

The chemopreventive activity of resveratrol, a stilbene found in grapes and wine, was evaluated in a human monocytic leukemia cell line at the same concentration (100 nM to 1 microM) as that found in the blood-stream after moderate wine intake. As early as at 4 h after intake, resveratrol exhibited antiproliferative and cytotoxic activity. At the same time, some apoptotic-like phenomena were detected such as cell membrane perturbation (phosphatidylserine-annexin V binding), apolipoprotein (APO)-1/FAS (CD95) expression and mitochondrial (delta psi) depolarization. The anticancer drug camptothecin, used as a positive control, did not significantly increase APO-1/FAS (CD95) levels, while only a modest increase in APO-1/FAS-CD95 ligand (CD95-L) was detected. At 12 h, however, resveratrol at concentrations of 100 nM and 1 microM did not exhibit the same antiproliferative activity and increased cell proliferation was correlated to a significant increase in FAS-L expression. We conclude that treatment with low doses of resveratrol, such as those found after moderate wine intake, is not sufficient to stop human leukemia cell line proliferation and that cell resistance, marked by high FAS-L (CD95-L) expression, could be mediated by low (delta psi) mitochondria-released antiapoptotic factors such as BCL-2. It is also suggested that the synergistic action of other wine components with resveratrol might, at least partially, explain its chemopreventive activity.