The association of academic tracking to depressive symptoms among adolescents in three Caribbean countries

<p>Abstract</p> <p>Background</p> <p>Students who are tracked into low performing schools or classrooms that limit their life chances may report increased depressive symptoms. Limited research has been conducted on academic tracking and its association with depressive symptoms among high school students in the Caribbean. This project examines levels of depressive symptoms among tenth grade students tracked within and between high schools in Jamaica, St. Vincent and St. Kitts and Nevis.</p> <p>Methods</p> <p>Students enrolled in grade ten of the 2006/2007 academic year in Jamaica, St. Kitts and Nevis and St. Vincent were administered the Beck Depression Inventory II (BDI-II). In Jamaica and St. Vincent, academic tracking was operationalized using data provided by the local Ministries of Education. These Ministries ranked ordered schools according to students' performance on Caribbean school leaving examinations. In St. Kitts and Nevis tracking was operationalized by classroom assignments within schools whereby students were grouped into classrooms according to their levels of academic achievement. Multiple regression analyses were conducted to examine the relationships between academic tracking and BDI-II depression scores.</p> <p>Results</p> <p>A wide cross-section of 4^thform students in each nation was sampled (n = 1738; 278 from Jamaica, 737 St. Kitts and Nevis, 716 from St. Vincent; 52% females, 46.2% males and 1.8% no gender reported; age 12 to 19 years, mean = 15.4 yrs, sd = .9 yr). Roughly half (53%) of the students reported some symptoms of depression with 19.2% reporting moderate and 10.7% reporting severe symptoms of depression. Students in Jamaica reported significantly higher depression scores than those in either St. Kitts and Nevis or St. Vincent (p < .01). Students assigned to a higher academic track reported significantly lower BDI-II scores than students who were assigned to the lower academic track (p < .01).</p> <p>Conclusions</p> <p>There appears to be an association between academic tracking and depressive symptoms that is differentially manifested across the islands of Jamaica, St. Kitts and Nevis and St. Vincent.</p

Gender specific effects on the actin-remodelling protein Flightless I and TGF-beta 1 contribute to impaired wound healing in aged skin

Impaired wound healing in the elderly presents a major clinical challenge. Understanding the cellular mechanisms behind age-related impaired healing is vital for developing new wound therapies. Here we show that the actin-remodelling protein, Flightless I (FliI) is a contributing factor to the poor healing observed in elderly skin and that gender plays a major role in this process. Using young and aged, wild-type and FliI overexpressing mice we found that aging significantly elevated FliI expression in the epidermis and wound matrix. Aging exacerbated the negative effect of FliI on wound repair and wounds in aged FliI transgenic mice were larger with delayed reepithelialisation. When the effect of gender was further analysed, despite increased FliI expression in young and aged male and female mice, female FliI transgenic mice had the most severe wound healing phenotype suggesting that male mice were refractory to FliI gene expression. Of potential importance, males, but not females, up-regulated transforming growth factor-beta1 and this was most pronounced in aged male FliI overexpressing wounds. As FliI also functions as a co-activator of the estrogen nuclear receptor, increasing concentrations of beta-estradiol were added to skin fibroblasts and keratinocytes and significantly enhanced FliI expression and translocation of FliI from the cytoplasm to the nucleus was observed. FliI further inhibited estrogen-mediated collagen I secretion suggesting a mechanism via which FliI may directly affect provisional matrix synthesis. In summary, FliI is a contributing factor to impaired healing and strategies aimed at decreasing FliI levels in elderly skin may improve wound repair.Damian H. Adams, Xanthe L. Strudwick, Zlatko Kopecki, Jane A. Hooper-Jones, Klaus I. Matthaei, Hugh D. Campbell, Barry C. Powella and Allison J. Cowinhttp://www.elsevier.com/wps/find/journaldescription.cws_home/395/description#descriptio