Stem cells, cell therapies, and bioengineering in lung biology and disease 2021.

The 9th biennial conference titled "Stem Cells, Cell Therapies, and Bioengineering in Lung Biology and Diseases" was hosted virtually, due to the ongoing COVID-19 pandemic, in collaboration with the University of Vermont Larner College of Medicine, the National Heart, Lung, and Blood Institute, the Alpha-1 Foundation, the Cystic Fibrosis Foundation, and the International Society for Cell & Gene Therapy. The event was held from July 12th through 15th, 2021 with a pre-conference workshop held on July 9th. As in previous years, the objectives remained to review and discuss the status of active research areas involving stem cells (SCs), cellular therapeutics, and bioengineering as they relate to the human lung. Topics included 1) technological advancements in the in situ analysis of lung tissues, 2) new insights into stem cell signaling and plasticity in lung remodeling and regeneration, 3) the impact of extracellular matrix in stem cell regulation and airway engineering in lung regeneration, 4) differentiating and delivering stem cell therapeutics to the lung, 5) regeneration in response to viral infection, and 6) ethical development of cell-based treatments for lung diseases. This selection of topics represents some of the most dynamic and current research areas in lung biology. The virtual workshop included active discussion on state-of-the-art methods relating to the core features of the 2021 conference, including in situ proteomics, lung-on-chip, induced pluripotent stem cell (iPSC)-airway differentiation, and light sheet microscopy. The conference concluded with an open discussion to suggest funding priorities and recommendations for future research directions in basic and translational lung biology.

A wearable eddy current based pulmonary function sensor for continuous non-contact point-of-care monitoring during the COVID-19 pandemic.

Pulmonary function testing (PFT) allows for quantitative analysis of lung function. However, as a result of the coronavirus disease 2019 (COVID-19) pandemic, a majority of international medical societies have postponed PFTs in an effort to mitigate disease transmission, complicating the continuity of care in high-risk patients diagnosed with COVID-19 or preexisting lung pathologies. Here, we describe the development of a non-contact wearable pulmonary sensor for pulmonary waveform analysis, pulmonary volume quantification, and crude thoracic imaging using the eddy current (EC) phenomenon. Statistical regression analysis is performed to confirm the predictive validity of the sensor, and all data are continuously and digitally stored with a sampling rate of 6,660 samples/second. Wearable pulmonary function sensors may facilitate rapid point-of-care monitoring for high-risk individuals, especially during the COVID-19 pandemic, and easily interface with patient hospital records or telehealth services.

A dynamic, D-dimer-based thromboprophylaxis strategy in patients with COVID-19

Background While Coronavirus disease 2019 (COVID-19) is associated with increased risk for venous thromboembolism (VTE) during hospitalization despite prophylactic anticoagulation, there is a lack of evidence-based guidelines for dose escalation of anticoagulation for patients hospitalized with COVID-19. Methods This single-center retrospective cohort study was part of a quality improvement program evaluating safety and efficacy of anticoagulation protocols at our large, metropolitan public hospital. We implemented a D-dimer-based guideline for dosing unfractionated heparin (UFH) or low molecular weight heparin (LMWH) in COVID-19 hospitalized patients that allowed for up-titration from standard prophylactic dosing to escalated prophylactic dosing or therapeutic dosing based on patient risk and presence of known or highly suspected VTE. Primary endpoints were International Society on Thrombosis and Haemostasis (ISTH)-defined major and clinically relevant non-major bleeding (CRNMB) events and in-hospital survival. Findings Among 262 COVID-19-infected patients hospitalized between March 15th and June 15th, 2020, 125 (73.1%) were male. Highest anticoagulation dose was: 65.3% prophylactic, 13.4% escalated prophylactic, 21.4% therapeutic. The dose was uptitrated in 83 (31.6%) patients. Bleeding events were comparable between the therapeutic (12.5%) and escalated prophylactic groups (11.4%), but significantly higher than in the prophylactic group (1.2%). In-hospital survival at 28 days was superior among patients whose anticoagulation was uptitrated to either escalated prophylactic or therapeutic (77.6%), compared to those receiving fixed prophylactic (56.7%) or fixed therapeutic (26.7%) dosing (p = 0.001). Conclusion A dynamic, D-dimer based dose escalation of anticoagulation for hospitalized patients with COVID-19 may improve in-hospital mortality without increasing fatal bleeding.