Comparison of Nucleic Acid Extraction Kits for Detecting Pathogens in Spiked Human Serum

Nucleic acid extraction is a laboratory process by which DNA and RNA can be isolated for downstream applications. Currently, there are many commercial DNA and RNA extraction kits available to simplify this process. These kits vary in cost, processing time, and required materials. While most studies comparing commercial extraction kits analyze using real-time qPCR, DNA sequencing has become a popular technique for determining specific pathogens present in microbial communities. This study compares the ability of 11 different nucleic extraction kits to detect pathogens from samples spiked with known proportions of bacteria and yeast. Additionally, variations of the kits were performed, including different lysis techniques or addition of carrier RNA. Ultimately, the results of the study demonstrate that the use of mechanical or enzyme-based lysis techniques generally result in proportions that are more accurate to that of the known standard. Taking into consideration the required materials for each kit, some kits can also be identified as effective options for low-resource environments.https://digitalcommons.unmc.edu/surp2021/1029/thumbnail.jp

Real-time Processing in Reading Sentence Comprehension for Normal Adult Individuals and Persons with Aphasia

The current study investigated whether persons with aphasia (PWA) exhibit longer processing times than normal adult individuals (NAI) in conditions that require more complex linguistic integration, using a self-paced word-by-word sentence reading method. The word-category comparison revealed that PWA show significantly longer reading times for nouns with high integration cost than for determiners with least linguistic integration cost compared to NAI. These results are consistent with the findings that PWA exhibit language-processing difficulties at points of high processing demand (Caplan, et al., 1985; McNeil, 1982)

Cytomegalovirus viral load within blood increases markedly in healthy people over the age of 70 years

Background Cytomegalovirus (CMV) is a highly prevalent herpesvirus, which maintains lifelong latency and places a significant burden on host immunity. Infection is associated with increased rates of vascular disease and overall mortality in the elderly and there is an urgent need for improved understanding of the viral-host balance during ageing. CMV is extremely difficult to detect in healthy donors, however, using droplet digital PCR of DNA from peripheral blood monocytes, we obtained an absolute quantification of viral load in 44 healthy donors across a range of ages. Results Viral DNA was detected in 24 % (9/37) of donors below the age of 70 but was found in all individuals above this age. Furthermore, the mean CMV load was only 8.6 copies per 10,000 monocytes until approximately 70 years of age when it increased by almost 30 fold to 249 copies in older individuals (p < 0.0001). CMV was found within classical CD14+ monocytes and was not detectable within the CD14-CD16+ subset. The titre of CMV-specific IgG increased inexorably with age indicating that loss of humoral immunity is not a determinant of the increased viral load. In contrast, although cellular immunity to the structural late protein pp65 increased with age, the T cell response to the immediate early protein IE1 decreased in older donors. Conclusion These data reveal that effective control of CMV is impaired during healthy ageing, most probably due to loss of cellular control of early viral reactivation. This information will be of value in guiding efforts to reduce CMV-associated health complications in the elderly

Mainstreaming domestic and gender-based violence into sociology and the criminology of violence

Sociological and criminological views of domestic and gender-based violencegenerally either dismiss it as not worthy of consideration, or focus on specificgroups of offenders and victims (male youth gangs, partner violence victims). Inthis paper, we take a holistic approach to violence, extending the definition fromthat commonly in use to encompass domestic violence and sexual violence. Weoperationalize that definition by using data from the latest sweep of the CrimeSurvey for England and Wales. By so doing, we identify that violence is currentlyunder-measured and ubiquitous; that it is gendered, and that other forms of violence (family violence, acquaintance violence against women) are equally ofconcern. We argue that violence studies are an important form of activity forsociologists

Genome-wide association meta-analysis identifies 48 risk variants and highlights the role of the stria vascularis in hearing loss

Hearing loss is one of the top contributors to years lived with disability and is a risk factor for dementia. Molecular evidence on the cellular origins of hearing loss in humans is growing. Here, we performed a genome-wide association meta-analysis of clinically diagnosed and self-reported hearing impairment on 723,266 individuals and identified 48 significant loci, 10 of which are novel. A large proportion of associations comprised missense variants, half of which lie within known familial hearing loss loci. We used single-cell RNA-sequencing data from mouse cochlea and brain and mapped common-variant genomic results to spindle, root, and basal cells from the stria vascularis, a structure in the cochlea necessary for normal hearing. Our findings indicate the importance of the stria vascularis in the mechanism of hearing impairment, providing future paths for developing targets for therapeutic intervention in hearing loss

A reference human induced pluripotent stem cell line for large-scale collaborative studies.

Human induced pluripotent stem cell (iPSC) lines are a powerful tool for studying development and disease, but the considerable phenotypic variation between lines makes it challenging to replicate key findings and integrate data across research groups. To address this issue, we sub-cloned candidate human iPSC lines and deeply characterized their genetic properties using whole genome sequencing, their genomic stability upon CRISPR-Cas9-based gene editing, and their phenotypic properties including differentiation to commonly used cell types. These studies identified KOLF2.1J as an all-around well-performing iPSC line. We then shared KOLF2.1J with groups around the world who tested its performance in head-to-head comparisons with their own preferred iPSC lines across a diverse range of differentiation protocols and functional assays. On the strength of these findings, we have made KOLF2.1J and its gene-edited derivative clones readily accessible to promote the standardization required for large-scale collaborative science in the stem cell field

I wanted to feel the way they did: Mimesis as a situational dynamic of peer mentoring by ex-offenders

This is an Accepted Manuscript of an article published by Taylor & Francis in Deviant Behavior on 10/10/2016, available online: http://www.tandfonline.com/doi/full/10.1080/01639625.2016.1237829Despite growing enthusiasm for peer mentoring as a criminal justice intervention, very little is known about what actually happens within these relationships. Drawing on an ethnographic study of peer mentoring in the North of England this article will foreground the concept of inspiration” in these settings. It will argue that Rene Girard’s theory of mimesis offers a framework with which to analyze role modeling in mentoring relationships and that a Girardian reading also offers interesting insights into the unresolved problem of the origins of personal change