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1.
PEC Innov ; 5: 100319, 2024 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-39101055

RESUMEN

Objective: Cancer treatment misinformation (CTM) is pervasive and impacts patient health outcomes. Cancer clinicians play an essential role in addressing CTM. We previously identified four self-reported responses that characterize the communication process clinicians engage in to address CTM. Clinicians 1) work to understand the misinformation; 2) correct the misinformation through education; 3) advise about future online searches; and 4) preserve the clinician-patient relationship. We sought to confirm and expand on the model we developed by observing cancer clinicians' communication while addressing CTM with a standardized patient (SP). Methods: 17 cancer clinicians were audio recorded in a SP encounter, in which a breast cancer SP asked three questions based on CTM. We thematically analyzed transcriptions of the recordings. Results: Clinicians used four responses with associated strategies and skills to address CTM in a standardized clinical encounter, confirming the previously developed model. The four responses were: (1) work to understand the misinformation; (2) correct the misinformation through education; (3) advise about future online searches; and (4) preserve the clinician-patient relationship. This observational approach allowed us to refine strategies within each response and identify communication skills clinicians enact to address CTM. Conclusion: These findings provide a strong foundation for the Misinformation Response Model for cancer clinicians. Future research should examine which components of the model are most effective in improving patient outcomes. Innovation: This is the first study observing clinicians' communication through simulated practice with SPs about CTM.

2.
J Clin Oncol ; 42(17): 2012-2020, 2024 Jun 10.
Artículo en Inglés | MEDLINE | ID: mdl-38382001

RESUMEN

Clinical trials frequently include multiple end points that mature at different times. The initial report, typically based on the primary end point, may be published when key planned co-primary or secondary analyses are not yet available. Clinical Trial Updates provide an opportunity to disseminate additional results from studies, published in JCO or elsewhere, for which the primary end point has already been reported.We report 3-year efficacy and safety results from the phase III CheckMate 649 trial. Patients with previously untreated advanced or metastatic gastroesophageal adenocarcinoma were randomly assigned to nivolumab plus chemotherapy or chemotherapy. Primary end points were overall survival (OS) and progression-free survival (PFS) by blinded independent central review (BICR) in patients whose tumors expressed PD-L1 combined positive score (CPS) ≥5. With 36.2-month minimum follow-up, for patients with PD-L1 CPS ≥5, the OS hazard ratio (HR) for nivolumab plus chemotherapy versus chemotherapy was 0.70 (95% CI, 0.61 to 0.81); 21% versus 10% of patients were alive at 36 months, respectively; the PFS HR was 0.70 (95% CI, 0.60 to 0.81); 36-month PFS rates were 13% versus 8%, respectively. The objective response rate (ORR) per BICR was 60% (95% CI, 55 to 65) with nivolumab plus chemotherapy versus 45% (95% CI, 40 to 50) with chemotherapy; median duration of response was 9.6 months (95% CI, 8.2 to 12.4) versus 7.0 months (95% CI, 5.6 to 7.9), respectively. Nivolumab plus chemotherapy also continued to show improvement in OS, PFS, and ORR versus chemotherapy in the overall population. Adding nivolumab to chemotherapy maintained clinically meaningful long-term survival benefit versus chemotherapy alone, with an acceptable safety profile, supporting the continued use of nivolumab plus chemotherapy as standard first-line treatment for advanced gastroesophageal adenocarcinoma.


Asunto(s)
Adenocarcinoma , Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias Esofágicas , Unión Esofagogástrica , Nivolumab , Neoplasias Gástricas , Humanos , Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/patología , Neoplasias Esofágicas/mortalidad , Adenocarcinoma/tratamiento farmacológico , Adenocarcinoma/mortalidad , Adenocarcinoma/patología , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/patología , Neoplasias Gástricas/mortalidad , Nivolumab/uso terapéutico , Nivolumab/efectos adversos , Nivolumab/administración & dosificación , Unión Esofagogástrica/patología , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Masculino , Estudios de Seguimiento , Femenino , Anciano , Persona de Mediana Edad , Supervivencia sin Progresión , Adulto
3.
Materials (Basel) ; 15(19)2022 Sep 27.
Artículo en Inglés | MEDLINE | ID: mdl-36234032

RESUMEN

A new cell topology named the dodecagonal (a polygon with twelve sides, short for Dod) cell is proposed to optimize the gate-to-drain capacitance (Cgd) and reduce the specific ON-resistance (Ron,sp) of 4H-SiC planar power MOSFETs. The Dod and the octagonal (Oct) cells are used in the layout design of the 650 V SiC MOSFETs in this work. The experimental results confirm that the Dod-cell MOSFET achieves a 2.2× lower Ron,sp, 2.1× smaller high-frequency figure of merit (HF-FOM), higher turn on/off dv/dt, and 29% less switching loss than the fabricated Oct-cell MOSFET. The results demonstrate that the Dod cell is an attractive candidate for high-frequency power applications.

4.
Materials (Basel) ; 15(17)2022 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-36079378

RESUMEN

650 V SiC planar MOSFETs with various JFET widths, JFET doping concentrations, and gate oxide thicknesses were fabricated by a commercial SiC foundry on two six-inch SiC epitaxial wafers. An orthogonal P+ layout was used for the 650 V SiC MOSFETs to reduce the ON-resistance. The devices were packaged into open-cavity TO-247 packages for evaluation. Trade-off analysis of the static and dynamic performance of the 650 V SiC power MOSFETs was conducted. The measurement results show that a short JFET region with an enhanced JFET doping concentration reduces specific ON-resistance (Ron,sp) and lowers the gate-drain capacitance (Cgd). It was experimentally shown that a thinner gate oxide further reduces Ron,sp, although with a penalty in terms of increased Cgd. A design with 0.5 µm half JFET width, enhanced JFET doping concentration of 5.5×1016 cm-3, and thin gate oxide produces an excellent high-frequency figure of merit (HF-FOM) among recently published studies on 650 V SiC devices.

5.
JCI Insight ; 7(18)2022 09 22.
Artículo en Inglés | MEDLINE | ID: mdl-35972817

RESUMEN

BACKGROUNDNew therapeutic combinations to improve outcomes of patients with ovarian cancer are clearly needed. Preclinical studies with ribociclib (LEE-011), a CDK4/6 cell cycle checkpoint inhibitor, demonstrate a synergistic effect with platinum chemotherapy and efficacy as a maintenance therapy after chemotherapy. We tested the safety and initial efficacy of ribociclib in combination with platinum-based chemotherapy in recurrent ovarian cancer.METHODSThis phase I trial combined weekly carboplatin and paclitaxel chemotherapy with ribociclib, followed by ribociclib maintenance in patients with recurrent platinum-sensitive ovarian cancer. Primary objectives were safety and maximum tolerated dose (MTD) of ribociclib when given with platinum and taxane chemotherapy. Secondary endpoints were response rate (RR) and progression-free survival (PFS).RESULTSThirty-five patients were enrolled. Patients had a mean of 2.5 prior lines of chemotherapy, and 51% received prior maintenance therapy with poly(ADP-ribose) polymerase inhibitors and/or bevacizumab. The MTD was 400 mg. The most common adverse events included anemia (82.9%), neutropenia (82.9%), fatigue (82.9%), and nausea (77.1%). The overall RR was 79.3%, with a stable disease rate of 18%, resulting in a clinical benefit rate of 96.6%. Median PFS was 11.4 months. RR and PFS did not differ based on the number of lines of prior chemotherapy or prior maintenance therapy.CONCLUSIONThis work demonstrates that the combination of ribociclib with chemotherapy in ovarian cancer is feasible and safe. With a clinical benefit rate of 97%, this work provides encouraging evidence of clinical efficacy in patients with recurrent platinum-sensitive disease.TRIAL REGISTRATIONClinicalTrials.gov NCT03056833.FUNDINGThis investigator-initiated trial was supported by Novartis, which provided drugs and funds for trial execution.


Asunto(s)
Neoplasias Ováricas , Inhibidores de Poli(ADP-Ribosa) Polimerasas , Aminopiridinas , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Bevacizumab/uso terapéutico , Carboplatino/efectos adversos , Femenino , Humanos , Recurrencia Local de Neoplasia/tratamiento farmacológico , Neoplasias Ováricas/terapia , Paclitaxel/uso terapéutico , Platino (Metal) , Purinas
6.
Environ Sci Pollut Res Int ; 26(36): 36720-36731, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31741274

RESUMEN

The indoor air quality issue and its potential health problems are attracting increasingly attentions. In this study, micro-orifice uniform deposit impactor (MOUDI) was used to sample suspended particles from four typical indoor environments, including residence, office, cyber classroom, and chemical analysis room. Size-dependent concentrations of perfluoroalkyl substances (PFASs) and heavy metals in suspended particles were analyzed. Then, the International Commission on Radiological Protection deposition model was employed to estimate deposition efficiencies and fluxes of size-fractioned PFASs and heavy metals in the human respiratory tract. Most of the contaminants deposited in head airways, where coarse particles (aerodynamic diameter or Dp > 1.8 µm) contributed the most. By contrast, in the alveolar region fine particles (Dp < 1.8 µm) were dominant. The chronic daily intake through inhalation of PFASs and heavy metals via airborne particles were 10.3-37.5 pg kg-1days-1 and 3.1-25.9 mg kg-1days-1, respectively. The estimated total hazardous quotient of PFASs and heavy metals were 4.4 × 10-5-1.7 × 10-3 and 9.9 × 10-3-1.05 × 10-1, which is far lower than the acceptable threshold of 1. However, the incremental lifetime cancer risk induced by As, Cd, Co, Cr, and Ni were estimated to be 1.11 × 10-5-1.41 × 10-4 in total, which exceeded the acceptable threshold of 10-6. These findings implicate that there were health risks, especially cancer risks caused by heavy metals associated with airborne particles in urban indoor environments.


Asunto(s)
Contaminantes Atmosféricos/análisis , Contaminación del Aire Interior/análisis , Polvo/análisis , Monitoreo del Ambiente , Fluorocarburos/análisis , Vivienda , Humanos , Metales Pesados/análisis , Tamaño de la Partícula , Medición de Riesgo
7.
Transl Res ; 209: 55-67, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-30871956

RESUMEN

Cancer-associated fibrosis is a critical component of the tumor microenvironment (TME) which significantly impacts cancer behavior. However, there is significant controversy regarding fibrosis as a predominantly tumor promoting or tumor suppressing factor. Cells essential to the generation of tissue fibrosis such as fibroblasts and mesenchymal stem cells (MSCs) have dual phenotypes dependent upon their independence or association with cancer cells. Cancer-associated fibroblasts and cancer-associated MSCs have unique molecular profiles which facilitate cancer cell cross talk, influence extracellular matrix deposition, and direct the immune system to generate a protumorigenic environment. In contrast, normal tissue fibroblasts and MSCs are important in restraining cancer initiation, influencing epithelial cell differentiation, and limiting cancer cell invasion. We propose this apparent dichotomy of function is due to (1) cancer mediated stromal reprogramming; (2) tissue stromal source; (3) unique subtypes of fibrosis; and (4) the impact of fibrosis on other TME elements. First, as cancer progresses, tumor cells influence their surrounding stroma to move from a cancer restraining phenotype into a cancer supportive role. Second, cancer has specific organ tropism, thus stroma derived from preferred metastatic organs support growth while less preferred metastatic tissues do not. Third, there are subtypes of fibrosis which have unique function to support or inhibit cancer growth. Fourth, depleting fibrosis influences other TME components which drive the cancer response. Collectively, this review highlights the complexity of cancer-associated fibrosis and supports a dual function of fibrosis which evolves during the continuum of cancer growth.


Asunto(s)
Neoplasias/patología , Carcinogénesis/patología , Progresión de la Enfermedad , Fibrosis , Humanos , Terapia Molecular Dirigida , Neoplasias/terapia , Microambiente Tumoral
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