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Upon accumulation of improperly folded proteins in the Endoplasmic Reticulum (ER), the Unfolded Protein Response (UPR) is triggered to restore ER homeostasis. The induction of stress genes is a sine qua non condition for effective adaptive UPR. Although this requirement has been extensively described, the mechanisms underlying this process remain in part uncharacterized. Here, we show that p97/VCP, an AAA+ ATPase known to contribute to ER stress-induced gene expression, regulates the transcription factor GLI1, a primary effector of Hedgehog (Hh) signaling. Under basal (non-ER stress) conditions, GLI1 is repressed by a p97/VCP-HDAC1 complex while upon ER stress GLI1 is induced through a mechanism requiring both USF2 binding and increase histone acetylation at its promoter. Interestingly, the induction of GLI1 was independent of ligand-regulated Hh signaling. Further analysis showed that GLI1 cooperates with ATF6f to induce promoter activity and expression of XBP1, a key transcription factor driving UPR. Overall, our work demonstrates a novel role for GLI1 in the regulation of ER stress gene expression and defines the interplay between p97/VCP, HDAC1 and USF2 as essential players in this process., Competing Interests: Declaration of competing interest EC is a founding member of Thabor Tx (https://www.thabor-tx.com/). The other authors declare that they have no competing interests with the contents of this article., (Copyright © 2023. Published by Elsevier B.V.)

Objectives: To determine whether hydroxychloroquine (HCQ) is safe and effective at preventing COVID-19 infections among health care workers (HCWs)., Methods: In a 1: 1 randomized, placebo-controlled, double-blind, parallel-group, superiority trial at 34 US clinical centers, 1360 HCWs at risk for COVID-19 infection were enrolled between April and November 2020. Participants were randomized to HCQ or matched placebo. The HCQ dosing included a loading dose of HCQ 600 mg twice on day 1, followed by 400 mg daily for 29 days. The primary outcome was a composite of confirmed or suspected COVID-19 clinical infection by day 30, defined as new-onset fever, cough, or dyspnea and either a positive SARS-CoV-2 polymerase chain reaction test (confirmed) or a lack of confirmatory testing due to local restrictions (suspected)., Results: Study enrollment closed before full accrual due to recruitment challenges. The primary end point occurred in 41 (6.0%) participants receiving HCQ and 53 (7.8%) participants receiving placebo. No difference in the proportion of participants experiencing clinical infection (estimated difference of -1.8%, 95% confidence interval -4.6-0.9%, P = 0.20) was identified nor any significant safety issues., Conclusion: Oral HCQ taken as prescribed appeared safe among HCWs. No significant clinical benefits were observed. The study was not powered to detect a small but potentially important reduction in infection., Trial Registration: NCT04334148., Competing Interests: Declaration of competing interest All authors have completed the International Committee of Medical Journal Editors uniform disclosure form and declare: support from the Patient-Centered Outcomes Research Institute (PCORI) for the reported work; Vir Biotechnology (SC); AstraZeneca, GSK, Novartis, Pulmatric, Sanofi-Aventis, Genentech, Teva (MC); Vir Biotechnology (KA); Centers for Disease Control, Infection Control Education for Major Sports, LLC, UpToDate, AHRQ, NIAID (DA); NIH (KA); Pfizer (EO); Abbott (RR)., (Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Wastewater-based epidemiology (WBE) has been deployed broadly as an early warning tool for emerging COVID-19 outbreaks. WBE can inform targeted interventions and identify communities with high transmission, enabling quick and effective responses. As the wastewater (WW) becomes an increasingly important indicator for COVID-19 transmission, more robust methods and metrics are needed to guide public health decision-making. This research aimed to develop and implement a mathematical framework to infer incident cases of COVID-19 from SARS-CoV-2 levels measured in WW. We propose a classification scheme to assess the adequacy of model training periods based on clinical testing rates and assess the sensitivity of model predictions to training periods. A testing period is classified as adequate when the rate of change in testing is greater than the rate of change in cases. We present a Bayesian deconvolution and linear regression model to estimate COVID-19 cases from WW data. The effective reproductive number is estimated from reconstructed cases using WW. The proposed modeling framework was applied to three Northern California communities served by distinct WW treatment plants. The results showed that training periods with adequate testing are essential to provide accurate projections of COVID-19 incidence., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 The Author(s). Published by Elsevier B.V. All rights reserved.)

Background: Timely trial start-up is a key determinant of trial success; however, delays during start-up are common and costly. Moreover, data on start-up metrics in pediatric clinical trials are sparse. To expedite trial start-up, the Trial Innovation Network piloted three novel mechanisms in the trial titled Dexmedetomidine Opioid Sparing Effect in Mechanically Ventilated Children (DOSE), a multi-site, randomized, double-blind, placebo-controlled trial in the pediatric intensive care setting., Methods: The three novel start-up mechanisms included: 1) competitive activation; 2) use of trial start-up experts, called site navigators; and 3) supplemental funds earned for achieving pre-determined milestones. After sites were activated, they received a web-based survey to report perceptions of the DOSE start-up process. In addition to perceptions, metrics analyzed included milestones met, time to start-up, and subsequent enrollment of subjects., Results: Twenty sites were selected for participation, with 19 sites being fully activated. Across activated sites, the median (quartile 1, quartile 3) time from receipt of regulatory documents to site activation was 82 days (68, 113). Sites reported that of the three novel mechanisms, the most motivating factor for expeditious activation was additional funding available for achieving start-up milestones, followed by site navigator assistance and then competitive site activation., Conclusion: Study start-up is a critical time for the success of clinical trials, and innovative methods to minimize delays during start-up are needed. Milestone-based funds and site navigators were preferred mechanisms by sites participating in the DOSE study and may have contributed to the expeditious start-up timeline achieved., Clinicaltrials: gov #: NCT03938857., Competing Interests: Declaration of Competing Interest AEB receives salary support through the US government National Institute of Child Health and Human Development T32 training grant (1T32HD094671). MLB receives salary support from the National Institutes of Health (5R01HD089928–05, 5U24TR001608–4, HHSN275201800003I, 3U24TR001608-04S1), PCORI (PaCr-2017C2–8177), FDA Arthritis Advisory Committee, and the Childhood Arthritis and Rheumatology Research Alliance. CDH has performed consulting services for Tellus Therapeutics and Amarin Pharma, Inc. unrelated to the content of this article. JMC receives salary support from the National Institutes of Health (U24HL135691). RGG and KGA have provided consulting services for industry unrelated to the content of this article. CPH receives salary support for research from National Institute for Child Health and Human Development (NICHD) (R13HD102136; RL1HD107784; R01HD106588), the National Heart Lung and Blood Institute (NHLBI) (R61/R33HL147833), the US Food and Drug Administration (R01-FD006099, PI Laughon; and U18-FD006298), the U.S. government for his work in pediatric clinical pharmacology (Government Contract HHSN275201800003I, PI: Benjamin under the Best Pharmaceuticals for Children Act), the non-profit Burrhoughs Wellcome Fund, and other sponsors for drug development in adults and children (https://dcri.org/about-us/conflict-of-interest/). KOZ received salary support from NICHD (1K23HD091398; Zimmerman), Duke CTSA (KL2TR001115; Zimmerman), Pediatric Trials Network (NIH/HHSN-275201000003I), and FDA (UG3/UH3 FD 006797)., (Copyright © 2022 Elsevier Inc. All rights reserved.)

Background: The SARS CoV-2 virus has caused one of the deadliest pandemics in recent history, resulting in over 170 million deaths and global economic disruption. There remains an urgent need for clinical trials to test therapies for treatment and prevention., Design: An online research platform was created to support a registry community of healthcare workers (HCWs) to understand their experiences and conduct clinical studies to address their concerns. The first study, HERO-HCQ, was a double-blind, multicenter, randomized, pragmatic trial to evaluate the superiority of hydroxychloroquine (HCQ) vs placebo for pre-exposure prophylaxis (PrEP) of COVID-19 clinical infection in HCWs. Secondary objectives were to assess the efficacy of HCQ in preventing viral shedding of COVID-19 among HCWs and to assess the safety and tolerability of HCQ., Methods: HCWs joined the Registry and were pre-screened for trial interest and eligibility. Trial participants were randomized 1:1 to receive HCQ or placebo. On-site baseline assessment included a COVID-19 nasopharyngeal PCR and blood serology test. Weekly follow-up was done via an online portal and included screening for symptoms of COVID-19, self-reported testing, adverse events, and quality of life assessments. The on-site visit was repeated at Day 30., Discussion: The HERO research platform offers an approach to rapidly engage, screen, invite and enroll into clinical studies using a novel participant-facing online portal interface and remote data collection, enabling limited onsite procedures for conduct of a pragmatic clinical trial. This platform may be an example for future clinical trials of common conditions to enable more rapid evidence generation., (Copyright © 2021 Elsevier Inc. All rights reserved.)

Unresolved experimental Lyme arthritis in C3H 5-lipoxygenase (5-LOX) -/- mice is associated with impaired macrophage phagocytosis of Borrelia burgdorferi In the present study, we further investigated the effects of the 5-LOX metabolite, leukotriene (LT)B 4 on phagocytosis of B. burgdorferi Bone marrow-derived macrophages (BMDMs) from 5-LOX -/- mice were defective in the uptake and killing of B. burgdorferi from the earliest stages of spirochete internalization. BMDMs from mice deficient for the LTB 4 high-affinity receptor (BLT1 -/- ) were also unable to efficiently phagocytose B. burgdorferi Addition of exogenous LTB 4 augmented the phagocytic capability of BMDMs from both 5-LOX -/- and BLT1 -/- mice, suggesting that the low-affinity LTB 4 receptor, BLT2, might be involved. Blocking BLT2 activity with the specific antagonist, LY255283, inhibited phagocytosis in LTB 4 -stimulated BLT1 -/- BMDMs, demonstrating a role for BLT2. However, the lack of a phagocytic defect in BLT2 -/- BMDMs suggested that this was a compensatory effect. In contrast, 12(S)-hydroxyheptadeca-5Z,8E,10E-trienoic acid, a natural BLT2-specific high-affinity ligand, and resolvin E1, a BLT1 agonist, were both unable to boost phagocytosis in BMDMs from either 5-LOX -/- or BLT1 -/- mice, suggesting a specific role for LTB 4 in mediating phagocytosis in murine macrophages. This study demonstrates that LTB 4 promotes macrophage phagocytosis of bacteria via BLT1, and that BLT2 can fulfill this role in the absence of BLT1., (Copyright © 2017 by the American Society for Biochemistry and Molecular Biology, Inc.)