RESUMEN
BACKGROUND: Neuroblastoma (NB) is the most common extracranial solid tumor of childhood, and high-risk disease is resistant to intensive treatment. Histotripsy is a focused ultrasound therapy under development for tissue ablation via bubble activity. The goal of this study was to assess outcomes of histotripsy ablation in a xenograft model of high-risk NB. METHODS: Female NCr nude mice received NGP-luciferase cells intrarenally. Under ultrasound image guidance, histotripsy pulses were applied over a distance of 4-6 mm within the tumors. Bioluminescence indicative of tumor viability was quantified before, immediately after, and 24 h after histotripsy exposure. Tumors were immunostained to assess apoptosis (TUNEL), endothelium (endomucin), pericytes (αSMA), hypoxia (pimonidazole), vascular endothelial growth factor A (VEGFA), and platelet-derived growth factor-B (PDGF-B). The apoptotic cytokine TNFα and its downstream effector cleaved caspase-3 (c-casp-3) were assessed with SDS-PAGE. RESULTS: Histotripsy induced a 50% reduction in bioluminescence compared to untreated controls, with an absence of nuclei in the treatment core surrounded by a dense rim of TUNEL-positive cells. Tumor regions not targeted by histotripsy also showed an increase in TUNEL staining density. Increased apoptosis in histotripsy samples was consistent with increases in TNFα and c-casp-3 relative to controls. Treated tumors exhibited a decrease in hypoxia, VEGF, PDGF-B, and pericyte coverage of vasculature compared to control samples. Further, increases in vasodilation were found in histotripsy-treated specimens. CONCLUSIONS: In addition to ablative effects, histotripsy was found to drive tumor apoptosis through intrinsic pathways, altering blood vessel architecture, and reducing hypoxia.
Asunto(s)
Ultrasonido Enfocado de Alta Intensidad de Ablación , Neuroblastoma , Animales , Ratones , Humanos , Femenino , Factor A de Crecimiento Endotelial Vascular , Factor de Necrosis Tumoral alfa , Xenoinjertos , Ratones Desnudos , Neuroblastoma/terapia , Hipoxia , Apoptosis , Ultrasonido Enfocado de Alta Intensidad de Ablación/métodosRESUMEN
BACKGROUND: A novel Peer Review Academy was developed as a collaborative effort between the Association of Women Surgeons and the journal Surgery to provide formal training in peer review. We aimed to describe the outcomes of this initiative using a mixed methods approach. METHODS: We developed a year-long curriculum with monthly online didactic sessions. Women surgical trainee mentees were paired 1:1 with rotating women surgical faculty mentors for 3 formal peer review opportunities. We analyzed pre-course and post-course surveys to evaluate mentee perceptions of the academy and assessed changes in mentee review quality over time with blinded scoring of unedited reviews. Semi-structured interviews were conducted upon course completion. RESULTS: Ten women surgical faculty mentors and 10 women surgical trainees from across the United States and Canada successfully completed the Peer Review Academy. There were improvements in the mentees' confidence for all domains of peer review evaluated, including overall confidence in peer review, study novelty, study design, analytic approach, and review formatting (all, P ≤ .02). The mean score of peer review quality increased over time (59.2 ± 10.8 vs 76.5 ± 9.4; P = .02). In semi-structured interviews, important elements were emphasized across the Innovation, Implementation Process, and Individuals Domains, including the values of (1) a comprehensive approach to formal peer review education; (2) mentoring relationships between women faculty and resident surgeons; and (3) increasing diversity in the scientific peer review process. CONCLUSION: Our novel Peer Review Academy was feasible on a national scale, resulting in significant qualitative and quantitative improvements in women surgical trainee skillsets, and has the potential to grow and diversify the existing peer review pool.
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Tutoría , Humanos , Femenino , Mentores , Revisión por Pares , Curriculum , DocentesRESUMEN
Globally, there have been more than 285 million confirmed cases of coronavirus disease 2019 (COVID-19), with nearly 5.5 million deaths. Centers for Disease Control and Prevention data report that in the United States alone, there have been more than 59 million cases of COVID-19 with more than 800,000 lives lost as of January 2022. Similar to other health care specialties, pediatric surgery departments have modified their treatment approach to delivering timely care while respecting resource allocation during the pandemic. In this review, we focus on the surgical management of pediatric patients, with specific attention to childhood cancer. The primary subject of this review is the development of triaging methods for patients with childhood cancer for surgical procedures and precautionary measures for operating on patients with COVID-19. [Pediatr Ann. 2022;51():e270-e276.].
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COVID-19 , Neoplasias , Niño , Humanos , Neoplasias/epidemiología , Neoplasias/cirugía , Pandemias/prevención & control , SARS-CoV-2 , Triaje/métodos , Estados Unidos/epidemiologíaRESUMEN
With the rise of the coronavirus disease 2019 (COVID-19) respiratory pandemic, there has been an increased need to consider the use of extracorporeal membrane oxygenation (ECMO) technology. In the early phases of the pandemic, adults constituted most of the critically ill patients, and ECMO management strategies were developed for use in this population. During the course of the pandemic, there has been a rise in the number of critically ill children infected with COVID-19. Although ECMO has been used in the care of pediatric patients for more than half a century, it has been challenging to apply the lessons learned from adult patients with COVID-19 directly to critically ill children for whom ECMO is under consideration. This article reviews ECMO technology and highlights a number of important changes in pediatric ECMO regarding those patients infected with COVID-19. [Pediatr Ann. 2022;51(7):e281-e285.].
Asunto(s)
COVID-19 , Oxigenación por Membrana Extracorpórea , Adulto , COVID-19/terapia , Niño , Enfermedad Crítica/terapia , Humanos , PandemiasRESUMEN
Peer review is a learned skill set that requires knowledge of study design, review construct, ethical considerations, and general expertise in a field of study. Participating in peer review is a rewarding and valuable experience in which all academic physicians are encouraged to partake. However, formal training opportunities in peer review are limited. In 2021, the Association of Women Surgeons and the journal Surgery collaborated to develop a Peer Review Academy. This academy is a 1-year longitudinal course that offers a select group of young women surgical trainees across all specialties a curriculum of monthly lectures and multiple formal mentored peer review opportunities to assist them in developing the foundation necessary to transition to independent peer review. The trainees and faculty mentors participating in the Association of Women Surgeons-Surgery Peer Review Academy compiled a summary of best peer review practices, which is intended to outline the elements of the skill set necessary to become a proficient peer reviewer.