Hypercholesterolaemia in schoolchildren in Lagos, Nigeria: an indication of a growing threat of cardiovascular disease?

BACKGROUND: There is growing burden of cardiovascular disease in developing countries and the pathogenesis of artherosclerotic damage starts in childhood OBJECTIVE: The study is to examine the prevalence of hyperlipidaemia in schoolchildren in Lagos, as it relates to both socio-demographic and anthropometric correlates METHODS: A cross-sectional study was carried out among urban and rural adolescent schoolchildren aged between 10 and 19 years in Eti-Osa Local Government Area (EOLGA) of Lagos State. A structured questionnaire was used to get information relating to socio-demographic characteristics, family history of cardiovascular disease, lifestyle habits and socio-economic class, and the students were examined for height, weight and cholesterol levels. RESULTS: Two hundred and eighty eight subjects in the urban region and 72 subjects in the rural region of Eti-Osa LGA participated in the study. The mean age was 15.6 +/- 2.2 years with a range of 10 to 18.9 years. The mean serum total cholesterol was 148.1 mg/dl with a range of 100 to 254 mg/dl. There was significant correlation between serum cholesterol and gender only in the 12-13.9 year group. Neither place of residence nor age had any significant correlation to serum cholesterol. Thirteen (3.6%) students had elevated serum total cholesterol of e"200 mg/dl. Four subjects had BMls above the 95th centile, giving a prevalence rate of 1.1%. They were females, living and schooling in the urban area and three-quarters were of high socio-economic class. CONCLUSION: Strengthening pre-enrollment medical and physical examinations, regular measurement of weight, height and BMI and laying emphasis on important lifestyle modifications early in the formative years are important to prevent development of non-communicable disease later in life.

Characterization of PPTNs, a cyanobacterial phosphopantetheinyl transferase from Nodularia spumigena NSOR10.

The phosphopantetheinyl transferases (PPTs) are a superfamily of essential enzymes required for the synthesis of a wide range of compounds, including fatty acids, polyketides, and nonribosomal peptide metabolites. These enzymes activate carrier proteins in specific biosynthetic pathways by transfer of a phosphopantetheinyl moiety. The diverse PPT superfamily can be divided into two families based on specificity and conserved sequence motifs. The first family is typified by the Escherichia coli acyl carrier protein synthase (AcpS), which is involved in fatty acid synthesis. The prototype of the second family is the broad-substrate-range PPT Sfp, which is required for surfactin biosynthesis in Bacillus subtilis. Most cyanobacteria do not encode an AcpS-like PPT, and furthermore, some of their Sfp-like PPTs belong to a unique phylogenetic subgroup defined by the PPTs involved in heterocyst differentiation. Here, we describe the first functional characterization of a cyanobacterial PPT based on a structural analysis and subsequent functional analysis of the Nodularia spumigena NSOR10 PPT. Southern hybridizations suggested that this enzyme may be the only PPT encoded in the N. spumigena NSOR10 genome. Expression and enzyme characterization showed that this PPT was capable of modifying carrier proteins resulting from both heterocyst glycoplipid synthesis and nodularin toxin synthesis. Cyanobacteria are a unique and vast source of bioactive metabolites; therefore, an understanding of cyanobacterial PPTs is important in order to harness the biotechnological potential of cyanobacterial natural products.

Perceptions and practices of private medical practitioners to adolescent reproductive health in Lagos State, Nigeria.

INTRODUCTION AND OBJECTIVES: Adolescent sexual and reproductive ill health is a major global public health issue, contributing to high levels of morbidity and mortality in adolescents. Although adolescents are known to have low levels of doctor consultations, private medical practitioners remain the preferred health care providers. This study was carried out to document the attitudes and experiences of private medical practitioners to adolescent reproductive health issues and to assess the factors that may influence their attitudes. METHODS: Information was obtained from a random sample of 187 out of 352 (53% ) registered private medical practitioners in 5 of the 20 Local Government Areas in Lagos State using a self-administered structured questionnaire. RESULTS: Sixty-two per cent of the doctors claimed they saw adolescents regularly, mainly for the treatment of sexually transmitted infections (STIs). Many (86% ) believed that adolescents should use contraception and suggested that parents, teachers and health workers provide sexuality information to adolescents. Sixty one percent of the practitioners believed that abortion should be legalised, though with restrictions. Many of them admitted to providing post abortion care to adolescents. The religious affiliation of the private medical practitioners influenced their perception and practices. CONCLUSION AND RECOMMENDATIONS: Improving the reproductive health care of adolescents is key to improving the world's future economic and social well being. It is recommended that appropriate sexuality education be made widely available to adolescents. In addition, private medical practitioners should strengthen their skills and be more actively involved in the care of adolescents by making their facilities more adolescent friendly.

Effect of prenatal exposure to diazepam on brain GABA(A) receptor mRNA levels in rats examined at late fetal or adult ages.

This study tested the hypotheses that in utero exposure to diazepam (DZ): (1) exerts long-lasting effects on GABA(A) receptor function by altering GABA(A) receptor subunit mRNA levels in specific brain regions of adult animals and/or (2) alters GABA(A) subunit mRNA expression in exposed fetuses. We assayed levels of mRNAs encoding several of the most predominant GABA(A) receptor subunits as well as cyclophilin mRNA. Analysis of mRNA levels in the cortex in adults showed that only gamma2S mRNA levels varied significantly with prenatal drug exposure, an effect unrelated to DZ action to the GABA(A) receptor. Analysis in fetuses indicated that mRNA levels varied as a function of both fetal sex and fetal drug environment. Irrespective of sex, DZ exposure increased both alpha1 and cyclophilin mRNAs in fetal brainstem whereas the mRNA levels of gamma2S were increased and decreased, respectively, in the telencephalon and hypothalamus of DZ-exposed fetuses.

Activated antigen-specific CD8+ T cells persist in the lungs following recovery from respiratory virus infections.

The poor correlation between cellular immunity to respiratory virus infections and the numbers of memory CD8(+) T cells in the secondary lymphoid organs suggests that there may be additional reservoirs of T cell memory to this class of infection. Here we identify a substantial population of Ag-specific T cells in the lung that persist for several months after recovery from an influenza or Sendai virus infection. These cells are present in high numbers in both the airways and lung parenchyma and can be distinguished from memory cell populations in the spleen and peripheral lymph nodes in terms of the relative frequencies among CD8(+) T cells, activation status, and kinetics of persistence. In addition, these cells are functional in terms of their ability to proliferate, express cytolytic activity, and secrete cytokines, although they do not express constitutive cytolytic activity. Adoptive transfer experiments demonstrated that the long-term establishment of activated T cells in the lung did not require infection in the lung by a pathogen carrying the inducing Ag. The kinetics of persistence of Ag-specific CD8(+) T cells in the lung suggests that they play a key role in protective cellular immunity to respiratory virus infections.

Synchronous postnatal increase in alpha1 and gamma2L GABA(A) receptor mRNAs and high affinity zolpidem binding across three regions of rat brain.

The objective of this study was to correlate postnatal changes in levels of mRNAs encoding predominant GABA(A) receptor subunits with a functional index of receptor development. This study is the first to quantify the temporal relationship between postnatal changes in predominant GABA(A) receptor mRNAs and zolpidem-sensitive GABA(A) receptor subtypes. In Experiment 1, we measured zolpidem displacement of 3H-flunitrazepam from rat cerebral cortex, hippocampus, and cerebellum at 0, 6, 14, 21, 29, and 90 postnatal days. Three independent 3H-flunitrazepam sites with high (K(i)=2. 7+/-0.6 nM), low (K(i)=67+/-4.8 nM), and very low (K(i)=4.1+/-0.9 mM) affinities for zolpidem varied in regional and developmental expression. In Experiment 2, we used RNAse protection assays to quantify levels of alpha1, alpha2, beta1, beta2, gamma2S and gamma2L mRNAs in the above regions at the same postnatal ages. Although there was a high degree of regional variation in the developmental expression of zolpidem-sensitive GABA(A) receptors and subunit mRNAs, a dramatic increase in high affinity zolpidem binding sites and alpha1 mRNA levels occurred within all three regions during the second postnatal week. Furthermore, a temporal overlap was observed between the rise in alpha1 mRNA and high affinity zolpidem binding and a more prolonged increase in gamma2L in each region. These results point to the inclusion of the alpha1 and gamma2L subunits in a GABA(A) receptor subtype with a high zolpidem affinity and suggest that a global signal may influence the emergence of this subtype in early postnatal life.