Global magnitude of visual impairment caused by uncorrected refractive errors in 2004

Estimates of the prevalence of visual impairment caused by uncorrected refractive errors in 2004 have been determined at regional and global levels for people aged 5 years and over from recent published and unpublished surveys. The estimates were based on the prevalence of visual acuity of less than 6/18 in the better eye with the currently available refractive correction that could be improved to equal to or better than 6/18 by refraction or pinhole. A total of 153 million people (range of uncertainty: 123 million to 184 million) are estimated to be visually impaired from uncorrected refractive errors, of whom eight million are blind. This cause of visual impairment has been overlooked in previous estimates that were based on best-corrected vision. Combined with the 161 million people visually impaired estimated in 2002 according to best-corrected vision, 314 million people are visually impaired from all causes: uncorrected refractive errors become the main cause of low vision and the second cause of blindness. Uncorrected refractive errors can hamper performance at school, reduce employability and productivity, and generally impair quality of life. Yet the correction of refractive errors with appropriate spectacles is among the most cost-effective interventions in eye health care. The results presented in this paper help to unearth a formerly hidden problem of public health dimensions and promote policy development and implementation, programmatic decision-making and corrective interventions, as well as stimulate research.     

Limb body wall complex

Limb body wall complex (LBWC) is a rare clinicopathological entity, representing a compound anomaly pattern in ventral body wall defects. The authors report a case of LBWC diagnosed in early antenatal period. The pregnancy was terminated following the diagnosis. Fetal autopsy findings were typical of LBWC.     

Translating mental health diagnostic and symptom terminology to train health workers and engage patients in cross-cultural,non-English speaking populations

Although there are guidelines for transcultural adaptation and validation of psychometric tools, similar resources do not exist for translation of diagnostic and symptom terminology used by health professionals to communicate with one another, their patients, and the public. The issue of translation is particularly salient when working with underserved, non-English speaking populations in high-income countries and low- and middle-income countries. As clinicians, researchers, and educators working in cross-cultural settings, we present four recommendations to avoid common pitfalls in these settings. We demonstrate the need for: (1) harmonization of terminology among clinicians, educators of health professionals, and health policymakers; (2) distinction in terminology used among health professionals and that used for communication with patients, families, and the lay public; (3) linkage of symptom assessment with functional assessment; and (4) establishment of a culture of evaluating communication and terminology for continued improvement.     

Inhibition of nuclear factor-kappaB activation by 2',8''-biapigenin

Inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) play a key role in the inflammatory processes. Improper overproduction of NO and prostaglandins by both enzymes are also believed to be involved in the pathogenesis of certain human cancers. Crude extracts of Selaginella tamariscina are used as an oriental medicine, which has been reported to inhibit the production of proinflammatory cytokines and cause cell cycle arrest. We isolated 2',8'-biapigenin from S. tamariscina and investigated whether it modulates iNOS and COX-2 expressions in Raw264.7 macrophages stimulated with lipopolysaccharide (LPS). We found that 2',8'-biapigenin blocked the transactivations of iNOS and COX-2 genes via the inactivation of nuclear factor-kappaB by preventing the nuclear translocation of p65. Hence, it may be possible to develop S. tamariscina extracts or 2',8'-biapigenin as a useful agent for cancer chemoprevention or for the treatment of inflammatory diseases.     

A systematic review of large scale and heterogeneous gene array data in heart failure

Microarray analysis has become a widely available tool for the generation of gene expression data on a genomic scale. Since the studies with similar protocols are growing, it has become necessary to systematically revise the large body of literature to decipher the gene expression data. In this review, we analyzed and critically discussed the database presented from 14 published studies that showed the gene expression profile in heart failure (HF) using microarray as a primary tool. After comparing the diverse database from these studies, we explain the protein translational, matri-cellular, immunological and fibrosis-related mechanisms in HF. In addition to previously annotated genes, we analyzed two differentially expressed expressed sequence tags (ESTs) (KIAA0152 and Suppressor of G(Two) allele of the suppressor of kinetochore protein-1, SGT1) in HF and showed how bio-informatic analysis of ESTs can lead to the identification of novel pathways active in HF. We have also discussed the new publicly accessible tools that link the gene expression data to gene ontogeny (GO) and functionality. Finally, we have systematically revised the chromosomal localization of the genes that are specifically up-regulated in HF. We have thus spotted chromosome 1, 2, 11 and 12 as the chromosomal hotspots of HF. This methodical approach will simplify the existing concepts on the evolution and progression of HF and lead us toward the development of newer diagnostic and therapeutic tools. Although modeled to HF, this approach should be of broader scientific interest to elaborate multiple genes and complex pathways.     

Theorizing the Impact of Targeted Narratives: Model Admiration and Narrative Memorability

Communication campaigns often include components that have been designed for a specific population, a strategy referred to as targeting. Targeted narratives are story-based components of a campaign that feature a character or situation relevant to the intended audience. Though commonplace, few studies have explicated the underlying mechanisms by which targeted narratives exert influence. In a message evaluation study, 316 women aged 40–75 (M_age = 51.19, SD = 8.11) were exposed to one of two targeted narratives and asked to complete measures of model admiration, narrative memorability, and intentions to receive a mammography. Targeting was based upon affiliation with the Mormon church. The results revealed that the relationship between the targeted narratives and screening intentions was especially strong for women from the target population who admired the depicted models and found the stories memorable.     

Angiocentric glioma with high proliferative index: case report and review of the literature

With less than 50 cases previously reported in literature, angiocentric glioma (AG) is an uncommon, slow-growing tumor of the CNS that typically exhibits a low proliferative rate and is generally surgically curable. We report the case of a 3-year-old child who presented with seizures and was found to have a non-enhancing parietal lobe lesion with overlying calvarial remodeling. Following complete resection of the tumor, histopathological examination revealed bipolar spindle cells centered on cortical blood vessels, forming pseudorosettes with an ependymomatous appearance. Tumor cells were glial fibrillary acidic protein (GFAP) positive, yet failed to label with synaptophysin. Scattered tumor cells had a "dot-like" cytoplasmic staining with the antibody against epithelial membrane antigen (EMA). Collectively, these features favored a diagnosis of AG. Interestingly, the monoclonal antibody against Ki-67 (MIB-1) labeling rate averaged approximately 10.0%. The child continues to be tumor- and seizure-free ten months postoperatively. Long-term follow up is required to determine if the high proliferative rate observed in this AG translates into altered clinical behavior and/or a worse prognosis.     

Transesophageal echocardiographic assessment of pulmonary veins and left atrium in patients undergoing atrial fibrillation ablation

Background: Pulmonary vein (PV) antrum isolation with ganglionated plexi (GP) ablation is a novel atrial fibrillation (AF) ablation technique. The aim of this study was to evaluate acute changes in left atrial and PV flow velocities following PV antrum isolation with GP ablation using transesophageal echocardiography (TEE). Methods: TEE was performed before and after PV antrum isolation with GP ablation in 88 consecutive patients. All four PVs, when possible, were analyzed with regard to peak systolic and diastolic pulsed‐wave Doppler flow velocities. Left atrial appendage emptying velocities were also obtained. PV stenosis was defined as a peak PV Doppler flow velocity of ≥110 cm/sec with spectral broadening (turbulence). Results: All but four right inferior and four left inferior PVs were visualized. Compared to preablation values, both PV systolic and diastolic velocities increased after ablation (P < 0.05 for each of the four PVs). However, the systolic to diastolic ratio decreased significantly after ablation in all PVs (1.3 ± 0.6 to 0.9 ± 0.4, P < 0.0001, 1.2 ± 0.7 to 0.9 ± 0.4, P < 0.0001, 1.2 ± 0.6 to 1.0 ± 0.6, P = 0.035 and 1.1 ± 0.5 to 0.9 ± 0.5, P = 0.0001, for left superior, left inferior, right superior and right inferior PV, respectively). Left atrial appendage emptying velocities showed a trend towards higher values following ablation (62.7 ± 26.1 cm/sec vs. 67.5 ± 23.2 cm/sec, P = 0.07). Asymptomatic PV stenosis occurred in seven patients (seven PVs). Conclusions: PV antrum isolation with GP ablation acutely increased PV flow velocities and altered the pattern of PV Doppler flow signal, likely correlating with increased left atrial pressures, but did not appear to adversely impact on left atrial appendage physiology. (Echocardiography 2011;28:775‐781)