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1.
J Magn Reson ; 358: 107599, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38041994

RESUMEN

We describe the design of a low-field portable magnet, based on two ceramic magnets, separated by a distance, with their magnetic poles aligned to create a large homogeneous region with a field strength of 425 gauss. Ceramic magnets are an uncommon choice compared to Neodymium Iron Boron magnets for low-field magnetic resonance but are preferable for our purposes to create a homogeneous region at lower field strength. The low cost of large ceramic magnets results in an inexpensive design with a large measurement volume. The magnets rest in a 3D-printed structure, which allows for the magnets to be moved by hand so the experimentalist has control over the field topology. To test the utility of the design, we explored an Overhauser dynamic nuclear polarization experiment with an aqueous solution of 4-Hydroxy-TEMPO. We also explored a simple flow measurement employing the ceramic magnets at a 6-degree pitch, creating a 14.6 gauss/cm constant gradient.

2.
Clin Lymphoma Myeloma Leuk ; 23(5): e232-e239, 2023 05.
Artículo en Inglés | MEDLINE | ID: mdl-36863897

RESUMEN

Introduction We report the results of a phase I clinical trial NCT03790072 of an adoptive transfer of γδ T lymphocytes from haploidentical donors in patients with refractory/relapsed acute myeloid leukemia after lymphodepletion regimen. Patients and methods Healthy donor mononuclear cells collected by leukapheresis were consistently expanded to generate products of 109 to 1010 γδ T cells. Seven patients received donor-derived T cell product at doses of 106/kg (n = 3), 107/kg (n = 3), and 108/kg (n = 1). Results Four patients had bone marrow evaluation at day 28. One patient had a complete remission, one was classified as morphologic leukemia-free state, one had stable disease and one had no evidence of response. In one patient, there was evidence of disease control with repeat infusions up to 100 days after first dosing. There were no treatment-related serious adverse events or treatment-related Common Terminology Criteria for Adverse Events grade 3 or greater toxicities at any dose level. Allogeneic Vγ9Vδ2 T cell infusion was shown to be safe and feasible up to a cell dose of 108/kg. Discussion In agreement with previously published studies, the infusion of allogeneic Vγ9Vδ2 cells was safe. The contribution of lymphodepleting chemotherapy to responses seen cannot be ruled out. Main limitation of the study is the low number of patients and interruption due to COVID-19 pandemic. Conclusion These positive Phase 1 results support progression to phase II clinical trials.


Asunto(s)
COVID-19 , Trasplante de Células Madre Hematopoyéticas , Leucemia Mieloide Aguda , Humanos , Pandemias , Resultado del Tratamiento , Leucemia Mieloide Aguda/terapia , Linfocitos T , Trasplante de Células Madre Hematopoyéticas/métodos
3.
Molecules ; 26(1)2020 Dec 23.
Artículo en Inglés | MEDLINE | ID: mdl-33374636

RESUMEN

Magnetic resonance imaging (MRI) is a non-invasive and non-optical measurement technique, which makes it a promising method for studying delicate and opaque samples, such as foam. Another key benefit of MRI is its sensitivity to different nuclei in a sample. The research presented in this article focuses on the use of MRI to measure density and velocity of foam as it passes through a pipe constriction. The foam was created by bubbling fluorinated gas through an aqueous solution. This allowed for the liquid and gas phases to be measured separately by probing the 1H and 19F behavior of the same foam. Density images and velocity maps of the gas and liquid phases of foam flowing through a pipe constriction are presented. In addition, results of computational fluid dynamics simulations of foam flow in the pipe constriction are compared with experimental results.


Asunto(s)
Gases/química , Procesamiento de Imagen Asistido por Computador/métodos , Cristales Líquidos/química , Imagen por Resonancia Magnética/métodos , Hidrodinámica
4.
J Int Assoc Provid AIDS Care ; 15(5): 440-8, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27225854

RESUMEN

BACKGROUND: Without antiretroviral therapy (ART), approximately one-half of HIV-infected infants will die by two years. In 2010, the World Health Organization (WHO) recommended that all HIV-infected infants < 24 months be initiated on ART regardless of their clinical/immunologic status. However, there remains little published data detailing cohorts of infants on ART in Sub-Saharan Africa. This study describes baseline characteristics and 12 month outcomes of a cohort of HIV-infected children < 24 months of age at pediatric HIV centers in Mwanza and Mbeya, Tanzania. MATERIALS AND METHODS: Retrospective chart review. INCLUSION CRITERIA: children < 24 months of age, initiated on ART at Baylor Children s Foundation Tanzania clinics, between March-December 2011. RESULTS: Baseline: Ninety-three children were initiated on ART at a median age of 13.4 months. Sixty-seven percent had severe immunosuppression and 31.5% had severe malnutrition. OUTCOME: Seventy-three patients were still in care at 12 month follow-up, there were four (4.3%) deaths, five (5.4%) patients transferred, and 11 (11.8%) loss to follow-up. Average CD4% was 32.7 (p < 0.001). Ninety percent of patients were WHO treatment stage I (p < 0.001). Eighty-six percent had normal nutritional status (p < 0.001). CONCLUSION: Our cohort of HIV infected children < 24 months initiated on ART did well clinically at 12 month outcomes despite being severely immunocompromised and malnourished at baseline. Nevirapine based regimens had good 12 month clinical outcomes, regardless of maternal exposure. Loss to follow-up rate was high for our cohort, demonstrating the need to develop strong mechanisms to counteract this.


Asunto(s)
Antirretrovirales/uso terapéutico , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Femenino , Humanos , Lactante , Masculino , Nevirapina/uso terapéutico , Estudios Retrospectivos , Tanzanía/epidemiología , Resultado del Tratamiento
5.
Eur J Oncol Nurs ; 18 Suppl 2: S97-122, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25174879

RESUMEN

PURPOSE: This supplement comprises an evaluation of Bridging Cancer Care, an initiative of the Bristol-Myers Squibb Foundation first conceived in 2007, addressing disparities in cancer care between Central and Eastern Europe and Western Europe. The strategic focus was refined in 2010 to put particular emphasis on capacity building of nurses in terms of education, training and empowerment. METHODS: The evaluation was based on review of data and information from the program's monitoring and evaluation framework and from biannual reports submitted by grantees to the Bristol-Myers Squibb Foundation. Eleven of the grantees were selected to develop case studies, which illustrate a) the role of nurses in tobacco cessation, b) expansion of the scope of practice for general practice nurses in health promotion, prevention and early detection of cancer, c) capacity building for nurses in contemporary models of cancer care, care navigation and psychosocial support and d) establishment of nurse training programs in palliative care in Central and Eastern Europe. RESULTS: Between 2010 and 2013, 22 grants were awarded in Russia, Poland, Czech Republic, Hungary and Romania. The evaluation characterized the program's impact in terms of improved health equity, health outcomes, capacity building of nurses and public awareness about cancer. With regard to health equity, all projects targeted disproportionately affected populations (children, poor, rural, ethnic) among whom 35,493 individuals were reached either through cancer screening or community and clinical care. In relation to capacity building, overall 5724 healthcare workers, primarily nurses, received training in various aspects of cancer care, while more than 50,000 patients and more than 470,000 members of the general public were reached through educational initiatives. Most of the programs have been sustained beyond Bristol-Myers Squibb Foundation funding. CONCLUSION: The positive results were achieved predominantly through greater nurse empowerment, supported by the development of 17 different, customized and nurse-focused curricula. Such training can increase nurses' knowledge and skills as demonstrated by examination testing and evaluation of nurses in the workplace. Several projects also resulted in enhanced nurse leadership attributes and eleven lead to positive changes in models of clinical or community care involving nurses. In eight cases, these changes were subsequently embodied in new health policies.


Asunto(s)
Enfermería en Salud Comunitaria/organización & administración , Promoción de la Salud/organización & administración , Accesibilidad a los Servicios de Salud/organización & administración , Neoplasias/epidemiología , Enfermería Oncológica/organización & administración , Cuidados Paliativos/organización & administración , Enfermería en Salud Comunitaria/educación , Europa (Continente)/epidemiología , Necesidades y Demandas de Servicios de Salud , Humanos , Neoplasias/diagnóstico , Neoplasias/terapia , Rol de la Enfermera , Enfermería Oncológica/educación , Evaluación de Programas y Proyectos de Salud , Nivel de Atención
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