Effect of Micronutrient-Fortified Milk on Zinc Intake and Plasma Concentration in Adolescent Girls

Objective: To assess the effect of dietary fortified milk with zinc and other micronutrients on zinc intake and plasma zinc content of adolescent girls.

Methods: The study included 108 schoolgirls (12–18 years old) from northwest Mexico, randomly assigned to either the control group (CG; n = 55) or the intervention group consuming a regular diet plus fortified milk (MG; n = 53). At the beginning of the study, age, weight, and height were measured. Food intake by the 24-hour recall method and plasma zinc levels assessed by absorption spectrophotometry were determined before and after 27 days of fortified milk intake.

Results: At baseline, no significant group-related differences were observed for energy, protein intake, zinc intake, and plasma zinc level (p > 0.05), and 35.2% of participant girls did not achieve their zinc requirement. After 27 days of treatment, there were no significant differences in energy and protein intake between groups (p > 0.05). Zinc intake was higher for MG than CG (16.7 ± 8.3 mg/d vs 10.5 ± 6.4 mg/d; p < 0.01), and there was a lower proportion of low zinc intake in MG than for CG (7 vs 16, respectively; p = 0.04). In addition, plasma zinc improved in the MG (116.6 ± 26.9 μg/dL, p < 0.01) compared with CG (98.5 ± 26.6 μg/dL), and it was mainly attributed to the fortified milk intake, as the main dietary zinc contributor.

Conclusion: Fortified milk intake is effective in increasing both intake and plasma zinc levels of adolescent Mexican girls; therefore, it could be an adequate strategy for zinc deficiency prevention or correction among adolescent girls.     

Nutrition-dependent influence of peripheral electrical stimulation during brain development on cortical spreading depression in weaned rats

As several other factors, nutritional deficiency and sensory input hyperactivation can influence the mammalian brain development. This work investigated the effects of repeated episodes of early peripheral electrostimulation (PE), associated or not with early malnutrition, on cortical spreading depression (CSD) propagation. From postnatal days 7-28, well-nourished and malnourished Wistar rat pups (whose mothers were fed a 23 and 8% protein diet, respectively) received daily sessions of repetitive PE (2 or 60 Hz-square-wave pulses, 1.5 ms duration, 10-40 V intensity), delivered by two electrodes attached to the left paws. At postnatal days 35-45, under anesthesia, KCl-elicited spreading depression was monitored at two cortical points of both hemispheres. In the well-nourished rats, 2 Hz, but not 60 Hz PE was associated with slower spreading depression propagation in the hemisphere contralateral to the stimulated body-side, as compared to the ipsilateral hemisphere. In the malnourished rats, this effect was found for both 2 and 60 Hz stimulation frequencies. In the sham-stimulated controls, which received similar paw-electrodes, but were not stimulated, no inter-hemispheric spreading depression differences were seen. The results indicate an impairing effect of early PE on spreading depression propagation, which is frequency-dependent and can be influenced by the animal's nutritional status. Data raise the question whether brain plasticity changes consequent to the interaction between sensory input activation and malnutrition would be involved in the here described spreading depression effects.     

Influence of health, lifestyle, working conditions, and sociodemography on early retirement among nurses: the Danish Nurse Cohort Study

AIMS: The aim of the study was to analyze the relationship between health, lifestyle, work-related and sociodemographic factors, and older nurses' exit from the labor market to Post-Employment Wage (PEW). PEW is an early retirement scheme to make it possible for workers to retire at the age of 60. METHODS: The study was based on 5,538 nurses in the age of 51-59 who in 1993 completed a questionnaire on health, lifestyle, working environment, and sociodemographic factors. The survey information was combined with longitudinal data from the Danish Integrated Database for Labor Market Research compiled by Statistics Denmark. The follow-up period was from 1993 to 2002. RESULTS: Nurses who had poor self-rated health were more likely to join PEW compared with nurses who considered their health as good (HR 1.28, 95% CI 1.16-1.41). Low job influence, high workload, and physical job demands only marginally increased the probability of retiring. Nurses who have relatively low gross incomes had an increased probability of entering PEW compared with nurses with relatively high gross incomes (HR 1.60, CI 1.43-1.79). Having a spouse increased the probability of joining PEW, especially having a spouse who had retired or was unemployed. CONCLUSIONS: The retirement age among nurses is influenced by a number of sociodemographic, work-related, and health-related factors. Poor health, low income, living outside the Copenhagen area, being married, having a spouse who is outside the labor force, and working in the daytime are all predictors of early retirement among nurses. Poor working environment only marginally increased the probability of retiring early.     

Peer Reviewed: A Comprehensive Worksite Wellness Program in Austin,Texas: Partnership Between Steps to a Healthier Austin and Capital Metropolitan Transportation Authority

Background

In 2003, Steps to a Healthier Austin was funded by the Centers for Disease Control and Prevention to implement chronic disease prevention and health promotion activities. We report Steps to a Healthier Austin''s partnership with Health & Lifestyles Corporate Wellness, Inc (Health & Lifestyles), to provide a worksite wellness program for Capital Metropolitan Transportation Authority (Capital Metro), Austin''s local transit authority.

Context

Capital Metro employs 1,282 people. In 2003, Health & Lifestyles was hired to help promote healthier lifestyles, increase employee morale, and combat rising health care costs and absenteeism rates.

Methods

Health & Lifestyles provided consultations with wellness coaches and personal trainers, a 24-hour company fitness center, personalized health assessments, and preventive screenings. The program expanded to include healthier food options, cash incentives, health newsletters, workshops, dietary counseling, smoking cessation programs, and a second fitness center.

Consequences

Participants in the wellness program reported improvements in physical activity, healthy food consumption, weight loss, and blood pressure. Capital Metro''s total health care costs increased by progressively smaller rates from 2003 to 2006 and then decreased from 2006 to 2007. Absenteeism has decreased by approximately 25% since the implementation of the program, and the overall return on the investment was calculated to be 2.43.

Interpretation

Since the implementation of the wellness program in 2003, Capital Metro has seen a reduction in costs associated with employee health care and absenteeism.     

Evaluation of Brucella abortus S19 vaccines commercialized in Brazil: Immunogenicity,residual virulence and MLVA15 genotyping

Live attenuated Brucella abortus S19 is the most effective vaccine against brucellosis in cattle. The assessment of the immunological parameters is essential to guarantee the biological quality of live anti-bacteria vaccines. The evaluation of genetic stability of live bacterial vaccines is also important in quality control. The aims of the present study were to compare (i) the immunogenicity and residual virulence, and (ii) the genotypic profile (MLVA15) of the eight S19 vaccines commercialized in Brazil to the USDA S19 reference strain. Two batches of each of the eight S19 commercial vaccines used in Brazil (A–H) were tested. They were submitted to the potency and residual virulence in vivo tests recommended by OIE and typed by the multiple-locus variable-number tandem repeat (VNTR) analysis (MLVA) described for Brucella spp. Our results demonstrated that all S19 vaccines commercialized in Brazil would be approved by Brazilian and OIE recommendations for potency and residual virulence. Furthermore, the S19 vaccine is genetically very homogeneous, as all but two batches (from the same manufacturer) tested showed identical MLVA15 profile. The two batches with different profiles presented six repeat units in locus Bruce07, instead of the five found in all other strains, including the USDA S19 reference strain. Although presenting a slightly different profile, this vaccine was also protective, as demonstrated by the immunogenicity and residual virulence assays performed. Therefore, the commercial Brazilian S19 vaccines were in accordance to Brazilian and international standards for immunogenicity and residual virulence tests. Moreover, our results also show that MLVA could be a useful inclusion to the list of in vitro tests required by the official control authorities to be applied to the commercial S19 vaccines, as an efficient assay to guarantee the quality and stability of the vaccine strains.     

Psychometric properties of the Parkinson's Disease Sleep Scale – Brazilian version

Parkinson's Disease Sleep Scale (PDSS) is a specific scale for the assessment of sleep disturbances in subjects with Parkinson's Disease (PD). This cross-sectional study set out to validate the PDSS in a Brazilian Portuguese Version (PDSS-BR). Ninety-five patients with PD participated in the study; their PD symptoms were evaluated by Unified Parkinson's Disease Rating Scale (UPDRS sections I–IV) and Hoehn and Yahr scale. Patients completed Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), Beck Depression Inventory (BDI) and PDSS-BR. PDSS-BR internal consistency was satisfactory (Cronbach's α: 0.82; all PDSS-BR items were significantly and positively associated with total score). Test–retest reliability for total PDSS-BR score was 0.94. PDSS-BR score was highly correlated with sleep PSQI scale (r_s = ?0.63; p < 0.0001) and moderately with ESS (r_s = ?0.32; p < 0.001) and UPDRS sections I (r_s = ?0.38; p < 0.0001) and II (r_s = ?0.36; p < 0.0001) and BDI (r_s = ?0.55; p < 0.0001). Depressive symptoms, as determined by the BDI, were associated with significantly worse quality of nocturnal sleep, as measured by the PDSS-BR.The psychometric attributes of the PDSS-BR were satisfactory and consistent with those of previous studies. In summary, PDSS-BR can be useful for clinical and research purposes in Brazil.     

Mental disorders and cardiovascular disease among adults in the United States

Objective

Numerous population-based studies have found an association between major depression and CVD, though these studies did not assess anxiety disorders. Patient samples have shown associations between anxiety disorders and cardiovascular disease (CVD), but without consideration of depressive disorders. Therefore, it remains unclear whether: (a) both anxiety and depressive disorder are associated with CVD; (b) these associations are generalizable to adults in the community.

Materials and Methods

Data were drawn from the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC), a nationally representative sample of 43,093 civilian non-institutionalized participants aged 18 and older.

Results

CVD (total prevalence 3.3%) was associated with increased likelihood of any anxiety disorder (OR = 1.43, (1.20, 1.71)), after adjusting for depressive disorders, as well as Generalized Anxiety Disorder (OR = 1.48 (1.09, 2.01)), Panic disorder (OR = 1.46 (1.12, 1.91)), and specific phobia (OR = 1.29 (1.04, 1.59)). CVD was significantly associated with any mood disorder (OR = 1.34 (1.13, 1.58)) after adjusting for anxiety disorders, though neither the link with major depression, nor other specific mood disorders remained significant after adjustment.

Conclusions

Our findings suggest that anxiety disorders, mood disorders, and CVD are highly comorbid among adults in the United States, and demonstrate the importance of including anxiety disorder assessment in studies of mental and physical comorbidity. These results reveal how the lack of investigation into specific relationships between CVD and the range of mental disorders in population-based studies of risk factors for CVD may obscure important relationships.     

Activity of the medial prefrontal cortex and amygdala underlies one-trial tolerance of rats in the elevated plus-maze

The anxiolytic effects of benzodiazepines are reduced after a single exposure of rats to elevated plus-maze test (EPM). Midazolam showed an anxioselective profile in animals submitted to one session (T1) but did not change the usual exploratory behavior of rats exposed twice (T2) to the EPM. In this study we examined further the one-trial tolerance by performing a factor analysis of the exploratory behavior of rats injected with saline before both trials as well as an immunohistochemistry study for quantification of Fos expression in encephalic structures after these sessions. Factor analysis of all behavioral categories revealed that factor 1 consisted of anxiety-related categories in T1 whereas these same behavioral categories loaded on factor 2 in T2. Risk assessment was also dissociated as it loaded stronger on T2 (factor 3) than on T1 (factor 4). Locomotor activity in T1 loaded on factor 5. Immunohistochemistry analyses showed that Fos expression predominated in limbic structures in T1 group. The medial prefrontal cortex and amygdala were the main areas activated in T2 group. These data suggest that anxiety and risk assessment behaviors change their valence across the EPM sessions. T2 is characterized by the emergence of a fear factor, more powerful risk assessment and medial prefrontal cortex activation. The amygdala functions as a switch between the anxiety-like patterns of T1 to the cognitive control of fear prevalent in T2. The EPM retest session is proposed as a tool for assessing the cognitive activity of rodents in the control of fear.     

MicroRNA Expression in the Locus Coeruleus,Entorhinal Cortex,and Hippocampus at Early and Middle Stages of Braak Neurofibrillary Tangle Pathology

The present study analyzes by RT-qPCR the expression of microRNA (miRNA)-27a-3p, miRNA-124-3p, miRNA-132-3p, and miRNA-143-3p in the locus coeruleus (LC), entorhinal cortex (EC), CA1 region of the hippocampus (CA1), and dentate gyrus (DG) of middle-aged (MA) individuals with no brain lesions and of cases at Braak and Braak stages I-II and II-IV of neurofibrillary tangle (NFT) pathology. The most affected region is the LC in which miRNA-27a-3p, miRNA-124-3p, and miRNA-143-3p show a trend to increase at stages I-II and are significantly up-regulated at stages III-IV when compared with MA. Only miRNA-143-3p is up-regulated in the EC at stages III-IV when compared with MA and with stages I-II. No modifications in the expression levels of miRNA-27a-3p, miRNA-124-3p, miRNA-132-3p, and miRNA-143-3p are found in CA1 at any stage, whereas miRNA-124-3p is significantly down-regulated in DG at stages I-II. Accompanying in situ hybridization reveals miRNA-27a-3p, miRNA-124-3p, and miRNA-143-3 localization in neurons, indicating that changes in miRNA expression are not a direct effect of changes in the numbers of neurons and glial cells. Present observations show for the first time important miRNA de-regulation in the LC at the first stages of NFT. Since the LC is the main noradrenergic input to the cerebral cortex, key regulator of mood and depression, and one of the first nuclei affected in aging and Alzheimer’s disease (AD), these findings provide insights for additional study of the LC in aging and AD.