Publications by authors named "P W Pappas"

Objective: CEAP categorizes patients based on disease progression and severity. Whether disease severity is associated with specific patterns of reflux is currently unknown. We hypothesize that patterns of reflux in patients with C2 and C5/6 disease will differ.

View Article and Find Full Text PDF

Introduction: Invasive fungal disease (IFD) is a morbid superinfection that can arise in critically ill patients with COVID-19 infection. Studies evaluating the full spectrum of COVID-19-associated fungal infections remain limited.

Methods: Single-center retrospective study assessing IFD in patients with COVID-19, hospitalized for ≥ 72 h in the intensive care unit (ICU) between 02/25/20 and 02/28/22 (n = 1410).

View Article and Find Full Text PDF

PTEN, a tumor suppressor phosphatase, regulates cellular functions by antagonizing the growth promoting PI3K/Akt/mTOR pathway through the dephosphorylation of the second messenger PIP. Many preclinical cellular and animal studies have used PTEN inhibitors to highlight specific disease contexts where acute activation of PI3K/Akt/mTOR pathway might offer therapeutic advantages. In the present study we have re-evaluated first-generation PTEN inhibitors, including established bisperoxo-vanadium complexes (bpVs).

View Article and Find Full Text PDF

Background: Infection by Cryptococcus gattii can lead to pulmonary or central nervous system (CNS) disease, or both. Whether site of infection and disease severity are associated with C. gattii species and lineages or with certain underlying medical conditions, or both is unclear.

View Article and Find Full Text PDF

This study investigates the enhancement of damping properties in carbon fiber-reinforced polymer (CFRP) composites by incorporating graphene nanoplatelets (GNPs) into the epoxy matrix. Epoxy and CFRP specimens with varying GNP concentrations, were developed and tested through free vibration experiments to measure damping ratios. Additionally, a computational model based on the finite element method was developed to simulate the damping behavior of these hybrid nanocomposites.

View Article and Find Full Text PDF