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1.
BMC cancer ; 21(1): 575-678, May., 2021. ilus, graf, tab
Artigo em Inglês | Sec. Est. Saúde SP, CONASS, SESSP-IDPCPROD, Sec. Est. Saúde SP | ID: biblio-1224518

RESUMO

BACKGROUND: No biomarker is available for identifying cancer patients at risk of developing nephrotoxicity when treated with cisplatin. METHODS: We performed microRNA (miRNA) sequencing using plasma collected 5 days after cisplatin treatment (D5) from twelve patients with head and neck cancer with and without nephrotoxicity (grade ≥ 2 increased serum creatinine). The most differentially expressed miRNAs between the two groups were selected for quantification at baseline and D5 in a larger cohort of patients. The association between miRNAs and nephrotoxicity was evaluated by calculating the odds ratio (OR) from univariate logistic regression. Receiver operating characteristic curves (ROC) were used to estimate the area under the curve (AUC), sensitivity, and specificity. RESULTS: MiR-3168 (p = 1.98 × 10− 8 ), miR-4718 (p = 4.24 × 10− 5 ), and miR-6125 (p = 6.60 × 10− 5 ) were the most differentially expressed miRNAs and were further quantified in 43, 48, and 53 patients, respectively. The baseline expression of miR-3168 (p = 0.0456, OR = 1.03, 95% CI: 1.00­1.06) and miR-4718 (p = 0.0388, OR = 1.56, 95% CI: 1.03­ 2.46) were associated with an increased risk of nephrotoxicity, whereas miR-6125 showed a trend (p = 0.0618, OR = 1.73, 95% CI: 0.98­3.29). MiR-4718 showed the highest AUC (0.77, 95% CI: 0.61­0.93) with sensitivity of 66.76 and specificity of 79.49. CONCLUSIONS: We have provided evidence of baseline plasmatic expression of miR-3168, miR-6125, and miR-4718 as potential predictors of cisplatin-induced nephrotoxicity.


Assuntos
Cisplatino , MicroRNAs , Nefropatias , Neoplasias
3.
Infectio ; 25(4): 284-288, oct.-dic. 2021. tab
Artigo em Espanhol | LILACS, COLNAL | ID: biblio-1286723

RESUMO

Resumen Objetivo: Determinar los factores de riesgo a la infección en cavidad residual post quistectomía hepática en los pacientes del hospital Ramiro Prialé Prialé - EsSalud -Huancayo. Materiales y Métodos: Se realizó una cohorte retrospectiva, entre enero del 2014 y enero del 2018. Se utilizó una ficha de recolección de datos. Se obtuvieron los riesgos relativos (RR) crudos y ajustados, con intervalos de confianza al 95%. Resultados: Participaron 83 pacientes. El 41,2% de las mujeres presentaron infección en la cavidad postquistectomía y la mediana de edad de los pacientes infecta dos fue de 33 años. Los antecedentes patológicos que se relacionaron con la infección fueron obesidad o sobrepeso (62,5%), neoplasia previa (100%) y enferme dad inmunológica previa (31%). La infección en cavidad residual postquistectomía estuvo relacionada a la presencia de obesidad o sobrepeso, diabetes mellitus, neoplasia previa , cirugía previa y al uso de antibióticos posteriores a la cirugía. Conclusiones: La obesidad o sobrepeso, diabetes mellitus, haber padecido alguna neoplasia o cirugía previa y el uso de antibióticos luego de la cirugía; son factores de riesgo para la infección en cavidad residual postquistectomía hepática en los pacientes del Hospital Nacional Ramiro Prialé Prialé EsSalud de Huancayo, Perú.


Abstract Objective: To determine the risk factors with the infection in the residual cavity after hepatic cystectomy in the patients of the Ramiro Prialé Prialé hospital - EsSalud -Huancayo. Materials and Methods: A retrospective cohort was conducted, between January 2014 and January 2018. A data collection sheet was used. Crude and adjusted relative risks (RR) were obtained, with 95% confidence intervals. Results: 83 patients participated. 41.2% of women infected in the post-cystectomy cavity and the median age of infected patients was 33 years. The pathological antecedents that were related to the infection were obesity or overweight (62.5%), previous neoplasia (100%) and previous immune disease (31%). Post-cystectomy residual cavity infection was affected by the presence of obesity or overweight (aRR: 1.56; 95% CI: 1.15-2.13; p value = 0.005), diabetes mellitus (aRR: 2.67; 95% CI : 2.09-3.41; p value <0.001), previous neoplasia (aRR: 2.49; 95% CI: 1.94-3.20; p value <0.001), previous surgery (aRR: 1.49; 95% CI: 1.36-1.64; p value <0.001) and the use of post-surgery antibiotics (aRR: 2.14; 95% CI: 1.30-3.51; p value = 0.003) Conclusions: Obesity or overweight, diabetes mellitus, having suffered some neoplasia or previous surgery and the use of antibiotics after surgery; they are factors associated with infection in the residual post-cystectomy liver cavity in patients of the Ramiro Prialé Prialé EsSalud National Hospital in Huancayo, Peru.


Assuntos
Humanos , Feminino , Adulto , Procedimentos Cirúrgicos Operatórios/efeitos adversos , Fatores de Risco , Infecções , Peru , Ranunculaceae , Diabetes Mellitus , Equinococose Hepática , Hospitais , Doenças do Sistema Imunitário , Neoplasias
4.
Rev. enferm. UERJ ; 29: e51932, jan.-dez. 2021.
Artigo em Inglês, Português | LILACS | ID: biblio-1224598

RESUMO

Objetivo: analisar a produção do conhecimento sobre a experiência da família acerca dos cuidados paliativos da criança com câncer hospitalizada na unidade de terapia intensiva e discutir o papel da enfermagem no atendimento à família da criança com câncer frente aos cuidados paliativos. Método: revisão integrativa realizada na PUBMED, LILACS, SCOPUS, SCIELO e CINAHL entre janeiro e março de 2020. Resultados: a amostra foi composta por 13 artigos, originando duas categorias: O impacto do cuidado paliativo da criança com câncer na dinâmica familiar e o cuidado multiprofissional, em especial dos enfermeiros, à família da criança com câncer. Conclusão: os estudos revelaram o panorama nacional e internacional dos cuidados paliativos à criança com câncer e a desestruturação da dinâmica familiar nos aspectos físicos, sociais, psicológicos, e financeiros, caracterizando o período como estressante e doloroso. Os enfermeiros estabelecem condutas terapêuticas objetivando promover qualidade de vida para crianças em cuidados paliativos e seus familiares.


Objective: to examine production of knowledge on families' experience of palliative care for children with cancer hospitalized in an intensive care center and discuss the role of nursing in assisting the family of the child in palliative cancer care. Method: this integrative review was conducted on PubMed, LILACS, Scopus, SciELO and CINAHL between January and March 2020. Results: from the sample of 13 articles, two categories originated: The impact of palliative cancer care for children on family dynamics and multiprofessional care, especially by nurses, for the family of the child with cancer. Conclusion: the studies revealed the national and international panorama of palliative care for children with cancer and the breakdown of physical, social, psychological, and financial family dynamics, characterizing the period as stressful and painful. Nurses establish therapeutic approaches aimed at promoting quality of life for children in palliative care and their families.


Objetivo: analizar la producción de conocimiento sobre la experiencia familiar en los cuidados paliativos de niños con cáncer, hospitalizados en la unidad de cuidados intensivos, y discutir el papel de la enfermería en la asistencia a la familia del niño con cáncer frente a los cuidados paliativos. Método: Revisión integradora realizada en PUBMED, LILACS, SCOPUS, SCIELO y CINAHL entre enero y marzo de 2020. Resultados: La muestra estuvo conformada por 13 artículos, originando dos categorías: El impacto de los cuidados paliativos para niños con cáncer en la dinámica familiar y los cuidados multiprofesionales, especialmente de las enfermeras, a la familia del niño con cáncer. Conclusión: Los estudios revelaron el panorama nacional e internacional de los cuidados paliativos para niños con cáncer y la ruptura de la dinámica familiar en aspectos físicos, sociales, psicológicos y económicos, caracterizándolo como un período estresante y doloroso. Las enfermeras establecen enfoques terapéuticos dirigidos a promover la calidad de vida de los niños en cuidados paliativos y sus familias.


Assuntos
Humanos , Masculino , Feminino , Criança , Cuidados Paliativos , Família/psicologia , Criança Hospitalizada , Conhecimentos, Atitudes e Prática em Saúde , Unidades de Terapia Intensiva , Neoplasias/terapia , Papel do Profissional de Enfermagem , Neoplasias/enfermagem , Relações Enfermeiro-Paciente
5.
Rev. enferm. UERJ ; 29: e52717, jan.-dez. 2021.
Artigo em Inglês, Português | LILACS | ID: biblio-1224536

RESUMO

Objetivo: compreender a construção dos significados da morte pelos profissionais de saúde frente ao cuidado à pessoa com câncer. Método: estudo qualitativo realizado em ambiente online, com a participação de 34 profissionais de saúde. Foram realizadas entrevistas semiestruturadas, interpretadas segundo análise temática. Resultados: duas categorias analíticas emergiram dos dados, indicando que os significados atribuídos à morte pelos participantes foram: como um processo inerente ao ciclo da vida humana, passagem para a outra vida, e fim do sofrimento tanto do paciente quanto dos profissionais de saúde. As dificuldades que apontaram em lidar com a morte se referem à falta de suporte psicológico, escassez de conhecimento sobre morte, cuidados paliativos e comunicação de más notícias. Conclusão: os profissionais construíram diferentes significados à morte de seus pacientes, tais como um processo natural da vida, vontade de um ser superior, passagem para uma nova existência e término do sofrimento dessas pessoas.


Objective: to understand the construction of meanings of death by healthcare professionals caring for people with cancer. Method: this qualitative study was carried out in an online environment through semi-structured interviews of 34 health professionals, which were interpreted using thematic analysis. Results: two analytical categories emerged from the data, indicating that the meanings attributed to death by the participants were: a process inherent in the human life cycle, a transition to the next life, and an end to the suffering of both patient and health professionals. The difficulties they pointed to in dealing with death related to lack of psychological support, lack of knowledge about death, palliative care, and communicating bad news. Conclusion: the professionals constructed different meanings to their patients' deaths: a natural process of life, the will of a higher being, a transition to a new existence, and an end to these people's suffering.


Objetivo: comprender la construcción de los significados de la muerte desde el punto de vista de los profesionales de la salud ante el cuidado a la persona con cáncer. Metodología: estudio cualitativo realizado en un entorno online, con la participación de 34 profesionales de la salud. Se realizaron entrevistas semiestructuradas, interpretadas según análisis temático. Resultados: de los datos surgieron dos categorías analíticas que indicaron que los significados atribuidos a la muerte por los participantes fueron: como u proceso inherente al ciclo de vida humano, transición a otra vida y fin al sufrimiento tanto del paciente como de los profesionales de la salud. Las dificultades que señalaron para afrontar la muerte se refieren a la falta de apoyo psicológico, escasez de conocimiento sobre la muerte, cuidados paliativos y comunicación de malas noticias. Conclusión: los profesionales han construido diferentes significados para la muerte de sus pacientes: un proceso natural de la vida, la voluntad de un ser superior, un paso a una nueva existencia y el fin del sufrimiento de estas personas.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Prática Profissional , Atitude Frente a Morte , Pessoal de Saúde , Morte , Oncologistas , Neoplasias , Cuidados Paliativos , Pessoal de Saúde/psicologia , Pesquisa Qualitativa , Oncologistas/psicologia , Hospitais , Neoplasias/psicologia
6.
Rev Esc Enferm USP ; 55: e20200518, 2021.
Artigo em Inglês, Português | MEDLINE | ID: mdl-34515723

RESUMO

OBJECTIVE: To investigate how the diagnosis of cancer during pregnancy occurred and assess its repercussions on the family experience of maternity. METHOD: Qualitative research, based on Symbolic Interactionism and conducted according to the Grounded Theory method. Twelve women diagnosed with cancer during pregnancy and 19 of their family members participated in the study. Data was collected from March 2018 to March 2019, using an identification form and an in-depth interview. The analysis followed the stages of open substantive coding. RESULTS: Data were organized into two categories of analysis: Being surprised by the discovery of cancer during pregnancy, which reveals the course of experiencing pregnancy and being diagnosed with cancer, Suffering from the repercussions of cancer on pregnancy and birth, which describes the repercussions of illness in the experience of pregnancy. CONCLUSION: Cancer during pregnancy was diagnosed in young women based on signs and symptoms that were confused with those of pregnancy and postpartum. The illness brought anxiety, impotence, fear and affected the experience of maternity, as it prevented women from having their pregnancy as planned and required routines different from those of low-risk pregnancies.


Assuntos
Neoplasias , Parto , Feminino , Teoria Fundamentada , Humanos , Masculino , Neoplasias/diagnóstico , Período Pós-Parto , Gravidez , Pesquisa Qualitativa
7.
Rev Esc Enferm USP ; 55: e20210159, 2021.
Artigo em Inglês, Português | MEDLINE | ID: mdl-34516609

RESUMO

OBJECTIVE: To discuss the evolution of research in cancer psychoneuroimmunology, the advances in the management of neuropsychological symptom clusters and their interface with mid-range theories, and practical applications in Nursing. METHOD: This is a theoretical-reflective study anchored in recent literature, as well as in the critical analysis of the authors. RESULTS: This is a promising field of investigation, which emphasizes the complexity and interaction of symptoms, the interrelationships among them, the factors influencing them, and their consequences. Subsidized by mid-range theories in Nursing, such as the Theory of Unpleasant Symptoms and the Theory of Symptom Management, analyses of these interrelationships support Oncology Nursing diagnoses and interventions. CONCLUSION: An innovative approach is proposed to qualify Oncology Nursing care based on the integration of recent advances in cancer psychoneuroimmunology, Nursing mid-range theories, and practical tools such as health coaching. The approach proposed may strengthen clinical nursing practice in the management of neuropsychological symptom clusters in oncology and shall be integrated into decision-making during cancer treatment, favoring person-centered care.


Assuntos
Neoplasias , Enfermagem Oncológica , Humanos , Modelos Teóricos , Cuidados Paliativos , Psiconeuroimunologia
8.
Talanta ; 235: 122727, 2021 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-34517595

RESUMO

An end-modified 2'-O-methyl molecular beacon (eMB) with unique nuclease resistance was designed and prepared. The eMB can resist the enzymatic digestion by DNase I, which would otherwise occur upon the hybridization of the eMB with a complementary sequence. As a result, the coupling use of eMBs and DNase I allows highly sensitive detection of miRNA with a limit of detection (LOD) of 2.5 pM. The analytical strategy was further used for detection of tumor exosomal microRNA-21, and down to 0.86 µg mL-1 A375 exosomes were detected. Overall, the present method can effectively quantify tumor-derived exosomes for cancer diagnosis.


Assuntos
Técnicas Biossensoriais , Exossomos , MicroRNAs , Neoplasias , Desoxirribonuclease I , Exossomos/genética , Humanos , Limite de Detecção , MicroRNAs/genética , Neoplasias/diagnóstico , Neoplasias/genética
9.
Talanta ; 235: 122748, 2021 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-34517616

RESUMO

Cancer-derived exosomes have emerged as a valuable biomarker for cancer diagnosis and prognosis. However, the heterogeneity of exosomes often leads to low selectivity based on the single recognition method. Given this, we have developed a dual-aptamer recognition strategy based on G-quadruplex nanowires for selective analysis of exosomes. In this work, target exosomes were first captured by CD63 aptamers modified on magnetic beads (MBs) and then combined with AS1411 aptamer, which shows high binding affinity to nucleolin when forming stable G-quadruplex structure. Then the free myc monomer can spontaneously assemble into higher order G-wire superstructures on the allosteric AS1411, and resulting enhanced fluorescence signal, which can realize sensitive and specific analysis of the target exosomes. This dual-aptamer recognition-based method is simple and universal for different types of exosomes, which is of great significance for clinical cancer diagnosis.


Assuntos
Aptâmeros de Nucleotídeos , Exossomos , Quadruplex G , Nanofios , Neoplasias , Humanos
10.
Anal Chem ; 93(36): 12434-12440, 2021 09 14.
Artigo em Inglês | MEDLINE | ID: mdl-34473470

RESUMO

The ability to accurately diagnose cancer is the cornerstone of early cancer treatment. The mitochondria in cancer cells maintain a higher pH and lower polarity relative to that in normal cells. A probe that reports signals only when both conditions are met may provide a reliable method for cancer detection with reduced false positives. Here, we construct an AND logic gate fluorescent probe using mitochondrial microenvironments as inputs. Utilizing the hydrolysis of a coumarin scaffold, the probe generates fluorescence signals ("ON") only when high pH (>7.0) and low polarity conditions exist simultaneously. Additionally, the higher mitochondrial membrane potential in cancer cells provides an additional level of selectivity because probe has increased affinity for cancer cell mitochondria. These capabilities endow the probe with a high contrast fluorescence diagnosis ability of cancer at cellular and tissue levels (as high as 51.9 fold), which is far exceeding the clinic threshold of 2.0 fold.


Assuntos
Lógica , Neoplasias , Cumarínicos , Fluorescência , Corantes Fluorescentes , Hidrólise , Neoplasias/diagnóstico
11.
Pract Radiat Oncol ; 11(5): 310-312, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34479658

RESUMO

I am a radiation oncologist with a busy clinical practice in Pennsylvania. I am credentialed to certify patients for medical marijuana and recommend that my patients try medical marijuana when symptom control with other options is suboptimal. This invited contribution is a brief summary of information that may help radiation oncologists understand their potential role in getting patients access to medical marijuana and my perspective on its potential value in the care of our patients.


Assuntos
Maconha Medicinal , Neoplasias , Humanos , Maconha Medicinal/uso terapêutico , Neoplasias/tratamento farmacológico , Pennsylvania , Radio-Oncologistas
12.
Biomater Sci ; 9(18): 6116-6125, 2021 Sep 14.
Artigo em Inglês | MEDLINE | ID: mdl-34519735

RESUMO

Single tumor starvation therapy can activate other signaling pathways in tumor cells and easily induce tumor cell metastasis. This research proposes an intelligent nanoparticle, which is effectively combined with plasmonic and immunotherapy to realize a new strategy of "upstream consumption and downstream blocking" of nutrients in tumor sites. The intelligent nanoparticle (Ag-G/C@M) was composed of Ag NCs loaded with glucose oxidase (GOx), catalase (CAT) and coated with the tumor cytomembrane (M). Homologous targeting of tumor cytomembrane facilitated more delivery of Ag-G/C@M to tumor sites and then the plasmonic excited from Ag-G/C@M can increase the catalytic efficiency of the enzymatic reaction. Hydrogen peroxide (H2O2) produced by Ag-G/C@M through the consumption of glucose is further catalyzed by CAT to produce oxygen (O2). This self-reinforcing cascade reaction not only consumes the nutrients of tumor cells, but also the plasmonic-induced photothermal therapy can further stimulate the immune system to produce interferon-γ (IFN-γ), blocking angiogenesis and restricting the nutrient supply of tumor cells. This strategy takes the nutrition necessary for cell survival as the entry point, through endogenous continuous consumption of intracellular nutrients and containment of exogenous supplementation, combined with plasmonic thermal effect and immunotherapy to kill tumor cells, which provides a new way of treating cancer safely and effectively.


Assuntos
Nanopartículas , Neoplasias , Catálise , Glucose Oxidase , Humanos , Peróxido de Hidrogênio , Neoplasias/terapia , Terapia Fototérmica
13.
J Res Health Sci ; 21(2): e00515, 2021 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-34465638

RESUMO

BACKGROUND: Coronavirus disease 2019 (COVID-19) is a contagious disease caused by a newly identified coronavirus. Our knowledge about the survival rate and prognostic factors of the disease is not established well. Therefore, this study aimed to identify the risk factors associated with the survival of COVID-19 cases in Hamadan province, West of Iran. STUDY DESIGN: A retrospective cohort study METHODS: This retrospective cohort study was performed in Hamadan province, West of Iran. The study included patients that referred to the provincial hospitals from February 20 to September 20, 2020. The follow-up of each subject was calculated from the date of onset of respiratory symptoms to the date of death. Demographic and clinical characteristics were extracted from patients' medical records. Kaplan-Meier method, Flemington-Harrington test, and Cox regression were used for data analysis. RESULTS: The overall 1, 5, 10, 20, 30 and 49-day survival rates were estimated at 99.57%, 95.61%, 91.15%, 87.34%, 86.91%, and 86.74%, respectively. Furthermore, survival time showed a significant association with age, gender, history of traveling to contaminated areas, co-morbidity, neoplasms, chronic diseases, and hospital units. CONCLUSION: In conclusion, elderly people, male gender, and comorbidities presented a greater risk of death. Therefore, it is important to pay more attention to this group of people to reduce the incidence and consequences after infection.


Assuntos
COVID-19/mortalidade , Doença Crônica/epidemiologia , Hospitalização , Neoplasias/epidemiologia , Pandemias , Viagem , Adulto , Fatores Etários , Idoso , COVID-19/diagnóstico , COVID-19/epidemiologia , Comorbidade , Mortalidade Hospitalar , Hospitais , Humanos , Irã (Geográfico)/epidemiologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Sistema de Registros , Estudos Retrospectivos , Fatores de Risco , SARS-CoV-2 , Fatores Sexuais , Análise de Sobrevida , Taxa de Sobrevida
14.
Rofo ; 193(S 02): S74-S76, 2021 Sep.
Artigo em Alemão | MEDLINE | ID: mdl-34470076
15.
BMC Pediatr ; 21(1): 376, 2021 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-34470598

RESUMO

BACKGROUND: Research has highlighted the need for evidence-based interventions to improve paediatric advance care planning (pACP) in adolescents with cancer. Although adolescents express the desire and ability to share their values, beliefs and preferences for treatment, there is a lack of structured multicomponent interventions to improve parent-adolescent communication on different ACP themes including those not limited to end-of-life care. The aim of this study is to evaluate the effectiveness and implementation, context and mechanisms of impact of a novel ACP program in paediatric oncology. METHODS: We will conduct a multi-centre parallel-group randomised controlled superiority trial with embedded mixed-methods process evaluation in Flanders, Belgium. Adolescents aged 10-18 who have cancer, and their parent(s) will be recruited via all four university hospitals in Flanders, Belgium, and support groups. Families will be randomised to receive care as usual or the multicomponent BOOST pACP program, consisting of three conversation sessions between an external facilitator and the adolescent and parent(s). The primary endpoint is improved parent-adolescent communication from the perspective of the adolescent. Secondary endpoints are adolescents' and parents' attitudes, self-efficacy, intention and behaviour regarding talking about ACP themes with each other, parents' perspective of shared decision making in the last clinical encounter, and the paediatric oncologist's intention and behaviour regarding talking about ACP themes with the family. Measurements will be performed at baseline, at 3 months and at 7 months using structured self-reported questionnaires. We will perform a process evaluation in the intervention group, with measurement throughout and post-intervention, using structured diaries filled out by the facilitators, interviews with facilitators, interviews with involved paediatric oncology teams, and audio-recordings of the BOOST pACP conversations. DISCUSSION: The BOOST pACP program has been developed to stimulate conversations on ACP themes between parent(s) and the adolescents, simultaneously lowering the threshold to discuss similar themes with healthcare professionals, initiating a process of normalization and integration of ACP in standard care. This combined outcome and process evaluation aims to contribute to building the necessary evidence to improve ACP in paediatric oncology. TRIAL REGISTRATION: The study is registered at ISRCTN, ISRCTN33228289 . Registration date: January 22, 2021.


Assuntos
Planejamento Antecipado de Cuidados , Neoplasias , Assistência Terminal , Adolescente , Criança , Humanos , Estudos Multicêntricos como Assunto , Neoplasias/terapia , Pais , Ensaios Clínicos Controlados Aleatórios como Assunto , Inquéritos e Questionários
16.
Washington, D.C.; PAHO; 2021-09-14. (PAHO/FPL/IM/21-0036).
em Inglês | PAHO-IRIS | ID: phr-54831

RESUMO

In October 2020, 30 participants and 14 panelists from the ministries of health from the Caribbean subregion, the Pan American Health Organization (PAHO), the World Health Organization, and various other institutions took part in a meeting on human papillomavirus (HPV) vaccination to end cervical cancer in the Caribbean countries. PAHO organized the meeting as a virtual event. This PAHO publication is the report of that meeting, whose sessions discussed strategies and shared experiences with the objective of eliminating cervical cancer in the Region of the Americas. Following the sequence of the sessions, the publication summarizes the speakers’ presentations and the subsequent discussions. The sessions focused on four main areas: updates on strategies for the regional and global elimination of cervical cancer: screening and treatment of cervical cancer; HPV vaccination; and impact of the HPV vaccine. The publication closes with the meeting’s closing considerations, which ranged from the importance of a collaborative approach and high vaccine coverage to considerations on COVID-19 and launch of the Global Strategy to Accelerate the Elimination of Cervical Cancer as a Public Health Problem.


Assuntos
Neoplasias do Colo do Útero , Neoplasias , Vacinas contra Papillomavirus , Região do Caribe
17.
Nanoscale ; 13(34): 14426-14434, 2021 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-34473179

RESUMO

Since carbon dots (CDs) exhibit excellent biocompatibility, low cytotoxicity, near-infrared (NIR) absorbance, and superior photostability, many types of CDs are considered as powerful candidates for photothermal therapy (PTT) applications. However, the development of a desirable CD is still difficult due to insufficient photothermal conversion, thus resulting in the use of high laser power densities at a high dose of CDs for the PTT effect. Herein, bioinspired sulfur-doped CDs (S-CDs) with strong NIR absorbance were prepared from Camellia japonica flowers via a facile hydrothermal method for enhancing the photothermal conversion efficiency. The as-prepared S-CDs exhibited various advantages including cost-effective preparation, good water-solubility, high biocompatibility, intense NIR absorption, and excellent photothermal effect with robust photostability. Most importantly, the optimal low dose of S-CDs (45 µg mL-1) successfully led to efficient PTT performance with a high photothermal conversion efficiency (55.4%) under moderate laser power (808 nm, 1.1 W cm-2) for safe and effective cancer therapy.


Assuntos
Camellia , Neoplasias , Carbono , Humanos , Neoplasias/tratamento farmacológico , Fototerapia , Terapia Fototérmica
18.
Mater Sci Eng C Mater Biol Appl ; 128: 112291, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34474842

RESUMO

Gold nanoclusters (AuNCs) have attracted much attention for tumor theranostics in recent years because of their ability of renal clearance and to escape the reticuloendothelial system (RES) sequestration. In this study, we presented a novel method to synthesize 68Ga-doped (labeled) AuNCs by simultaneous reduction of 68GaCl3 and HAuCl4 by glutathione. As synthesized 68Ga-doped, glutathione-coated AuNCs (68Ga-GSH@AuNCs) were ultrasmall in size (<2 nm), highly stable under physiological conditions and renally clearable, and had high efficiency for tumor targeting. To demonstrate the universality of this 68Ga labeling method and further enhance tumor targeting efficiency, arginine-glycine-aspartate (RGD)-containing peptide was introduced as co-reductant to synthesize RGD peptide and glutathione co-coated, 68Ga-labeled AuNCs (68Ga-RGD-GSH@AuNCs). Introduction of RGD peptide did not interfere the synthesis process but significantly enhanced the tumor targeting efficiency of the AuNCs. Our study demonstrated that it was feasible to label AuNCs with gallium-68 by direct reduction of the radioisotope and HAuCl4 with reductant peptides, holding a great potential for clinical translation for PET/CT detection of tumors.


Assuntos
Nanopartículas Metálicas , Neoplasias , Radioisótopos de Gálio , Glutationa , Ouro , Humanos , Neoplasias/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada
19.
Mater Sci Eng C Mater Biol Appl ; 128: 112293, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34474844

RESUMO

Due to increased requirements for precision cancer treatment, cancer chemotherapy and combination therapies have gradually developed in the direction of diagnosis and treatment integration. In this study, a non-toxic nano carrier that demonstrates integrated MRI signal enhancing performance, as well as better chemotherapy and photothermal conversion performance, was prepared and characterized. Furthermore, the carrier was used to construct an integrated system of tumor diagnosis and treatment. Our in vitro studies showed that this system has a considerable inhibition effect on tumor cells during the treatment of chemotherapy when combined with PTT, and in vivo studies showed that the system could improve the MRI signal of the tumor site with application of a safe dosage. Thus, this system based on NGO/USPIO has the potential to be a multi-functional nano drug delivery system integrating diagnosis and treatment benefits and applications that are worthy of further research.


Assuntos
Grafite , Nanopartículas de Magnetita , Neoplasias , Dextranos , Humanos , Neoplasias/diagnóstico por imagem , Neoplasias/tratamento farmacológico , Óxidos
20.
Mater Sci Eng C Mater Biol Appl ; 128: 112311, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34474862

RESUMO

Herein, we design a rGO-based magnetic nanocomposite by decorating rGO with citrate-coated magnetic nanoparticles (CMNP). The magnetic rGO (mrGO) was modified by phospholipid-polyethylene glycol to prepare PEGylated mrGO, for conjugating with gastrin-releasing peptide receptor (GRPR)-binding peptide (mrGOG). The anticancer drug doxorubicin (DOX) was bound to mrGO (mrGOG) by π-π stacking for drug delivery triggered by the low pH value in the endosome. The mrGOG showed enhanced photothermal effect under NIR irradiation, endorsing its role for dual targeted DOX delivery. With efficient DOX release in the endosomal environment and heat generation from light absorption in the NIR range, mrGOG/DOX could be used for combination chemo-photothermal therapy after intracellular uptake by cancer cells. We characterized the physico-chemical as well as biological properties of the synthesized nanocomposites. The mrGOG is stable in biological buffer solution, showing high biocompatibility and minimum hemolytic properties. Using U87 glioblastoma cells, we confirmed the magnetic drug targeting effect in vitro for selective cancer cell killing. The peptide ligand-mediated targeted delivery increases the efficiency of intracellular uptake of both nanocomposite and DOX up to ~3 times due to the over-expressed GRPR on U87 surface, leading to higher cytotoxicity. The increased cytotoxicity using mrGOG over mrGO was shown from a decreased IC50 value (0.70 to 0.48 µg/mL) and an increased cell apoptosis rate (19.8% to 47.1%). The IC50 and apoptosis rate changed further to 0.19 µg/mL and 76.8% in combination with NIR laser irradiation, with the photothermal effect supported from upregulation of heat shock protein HSP70 expression. Using U87 tumor xenograft model created in nude mice, we demonstrated that magnetic guidance after intravenous delivery of mrGOG/DOX could significantly reduce tumor size and prolong animal survival over free DOX and non-magnetic guided groups. Augmented with NIR laser treatment for 5 min, the anti-cancer efficacy significantly improves with elevated cell apoptosis and reduced cell proliferation. Together with safety profiles from hematological as well as major organ histological analysis of treated animals, the mrGOG nanocomposite is an effective nanomaterial for combination chemo-photothermal cancer therapy.


Assuntos
Hipertermia Induzida , Nanocompostos , Neoplasias , Animais , Linhagem Celular Tumoral , Doxorrubicina/farmacologia , Liberação Controlada de Fármacos , Grafite , Fenômenos Magnéticos , Camundongos , Camundongos Nus , Fototerapia , Receptores da Bombesina
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