Automated molecular detection of West Nile Virus in mosquito pools using the Panther Fusion system.

West Nile Virus (WNV) is an arthropod-borne virus that is spread through mosquito vectors. WNV emerged in the US in 1999 and has since become endemic in the US, causing the most domestically acquired arboviral disease in the country. Mosquito surveillance for WNV is useful to monitor arboviral disease burden over time and across different locations. RT-qPCR is the preferred method for WNV surveillance, but these methods are labor-intensive. The Panther Fusion System has an Open Access feature that allows for laboratory-developed tests (LDTs) to run on a fully automated system for nucleic acid extraction, RT-qPCR, and result generation. This study demonstrates the successful optimization of a WNV multiplex LDT (assay targets: ENV and NS1 genes) for high-throughput environmental surveillance testing of mosquito pool homogenates on the Panther Fusion System. Analytical sensitivity of the assay was 186 and 744 copies/PCR reaction for the ENV and NS1 targets, respectively. To assess the performance of this assay, a total of 80 mosquito pools were tested, including 60 previously tested pools and 20 spiked negative mosquito pools. Among the 60 previously tested specimens, the Panther Fusion WNV LDT demonstrated 100% positive and negative agreement with the CDC West Nile RT-qPCR assay. The Panther Fusion WNV LDT also detected all 20 spiked specimens. The Panther Fusion WNV LDT assay was successfully developed and optimized for high throughput testing with similar performance to the previously used CDC West Nile RT-qPCR assay.

South Asians Active Together (SAATH): Protocol for a multilevel physical activity intervention trial for South Asian American mother and daughter dyads.

South Asian (SA), including Asian Indian and Pakistani Americans, have a high burden of cardiometabolic risk factors and low levels of physical activity (PA). Increasing PA in the U.S. population is a national priority; however, SA American women and girls experience unique barriers to PA that are not addressed by current promotion efforts. To address this gap, our community-based participatory research partnership developed the South Asians Active Together (SAATH) intervention. This study is a two-arm randomized clinical trial to evaluate the effects, mediators, and implementation of the 18-week SAATH intervention. A total of 160 mother-daughter dyads will be randomized in a 1:1 ratio to the SAATH intervention and control groups. The intervention was designed for mother-daughter dyads and targets individual, interpersonal, and family levels through (1) group exercise classes, (2) mother-daughter discussions, and (3) peer group discussions. The intervention targets the environment level through community partner meetings aimed at creating environment changes to enhance PA opportunities for SA women and girls. The control group will receive PA education materials. We hypothesize that dyads who receive the intervention will have significantly greater increases in moderate- and vigorous-intensity PA (MVPA) from baseline to 4 months, compared to the control group. MVPA will be measured at 12 months in intervention participants to examine if changes are sustained. A process evaluation will use the reach, effectiveness, adoption, implementation, and maintenance (RE-AIM) framework. This study will fill knowledge gaps about the effectiveness and implementation of culturally adapted, community-based PA interventions for SA women and girls.

Differential modulation of COX-2 expression in A549 airway epithelial cells by structurally distinct PPAR(gamma) agonists: evidence for disparate functional effects which are independent of NF-(kappa)B and PPAR(gamma).

Ligands of peroxisome proliferator-activated receptor-gamma (PPAR(gamma)) are thought to possess anti-inflammatory properties mediated via both PPAR(gamma) dependent and independent mechanisms. This work investigates the effects of PPAR(gamma) ligands on the regulation of cyclooxygenase-2 (COX-2) in the human lung epithelial cell line, A549. The synthetic ligand troglitazone activated the phosphoinositide 3-kinase (PI3K) and mitogen-activated protein kinase pathway (MAPK), whereas the endogenous ligand, 15-deoxy-Delta(12,14)-prostaglandin J2 (15d-PGJ2), only activated the PI3K pathway. 15d-PGJ2 had no detectable effects on COX-2, mPGES expression, or PGE2 production. However, troglitazone induced time-dependent COX-2 expression, which was insensitive to PPAR(gamma) antagonists, but was abrogated by inhibitors of PI3K and the ERK MAP kinase pathway. Furthermore, troglitazone induced mPGES expression and PGE2 production. Neither troglitazone nor 15d-PGJ2 was able to convincingly activate NF-kappaB in A549 cells. Further heterogeneity in the responses to troglitazone and 15d-PGJ2 was observed in the regulation of gene expression as assessed by microarray analysis. In summary, this study provides compelling evidence that troglitazone (like 15d-PGJ2) can exert functional effects independently of actions via PPAR(gamma). Moreover, we have identified unique biochemical and functional actions of troglitazone that are not shared by 15d-PGJ2, which may influence the therapeutic potential of this compound in inflammatory settings.