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1.
Hum Reprod ; 38(7): 1332-1344, 2023 07 05.
Artigo em Inglês | MEDLINE | ID: mdl-37196325

RESUMO

STUDY QUESTION: Are patients willing to discuss the possibility of treatment being unsuccessful as part of routine care offered at clinics, and what are the factors associated with this willingness? SUMMARY ANSWER: Nine in every 10 patients are willing to discuss this possibility as part of routine care, with willingness being associated with higher perceived benefits, lower barriers, and stronger positive attitudes towards it. WHAT IS KNOWN ALREADY: Fifty-eight percent of patients who complete up to three cycles of IVF/ICSI in the UK do not achieve a live birth. Offering psychosocial care for unsuccessful fertility treatment (PCUFT), defined as assistance and guidance on the implications of treatment being unsuccessful, could reduce the psychosocial distress patients experience when it happens, and promote positive adjustment to this loss. Research shows 56% of patients are willing to plan for an unsuccessful cycle, but little is known about their willingness and preferences towards discussing the possibility of definitive unsuccessful treatment. STUDY DESIGN, SIZE, DURATION: The study was of cross-sectional design, comprising a theoretically driven and patient-centred bilingual (English, Portuguese) mixed-methods online survey. The survey was disseminated via social media (April 2021-January 2022). Eligibility criteria included being aged 18 or older, waiting to or undergoing an IVF/ICSI cycle, or having completed a cycle within the previous 6 months without achieving a pregnancy. Out of 651 people accessing the survey, 451 (69.3%) consented to participate. From these, 100 did not complete 50% of the survey questions, nine did not report on the primary outcome variable (willingness), and 342 completed the survey (completion rate 75.8%, 338 women). PARTICIPANTS/MATERIALS, SETTING, METHODS: The survey was informed by the Health Belief Model (HBM) and Theory of Planned Behaviour (TPB). Quantitative questions covered sociodemographic characteristics and treatment history. Quantitative and qualitative questions gathered data on past experiences, willingness, and preferences (with whom, what, how and when) to receive PCUFT, as well as theory-informed factors hypothesized to be associated with patients' willingness to receive it. Descriptive and inferential statistics were used on quantitative data about PCUFT experiences, willingness, and preferences, and thematic analysis was applied to textual data. Two logistic regressions were used to investigate the factors associated with patients' willingness. MAIN RESULTS AND THE ROLE OF CHANCE: Participants were, on average, 36 years old and most resided in Portugal (59.9%) and the UK (38.0%). The majority (97.1%) were in a relationship for around 10 years, and 86.3% were childless. Participants were undergoing treatment for, on average, 2 years [SD = 2.11, range: 0-12 years], with most (71.8%) having completed at least one IVF/ICSI cycle in the past, almost all (93.5%) without success. Around one-third (34.9%) reported having received PCUFT. Thematic analysis showed participants received it mainly from their consultant. The main topic discussed was patients' low prognosis, with the emphasis being put on achieving a positive outcome. Almost all participants (93.3%) would like to receive PCUFT. Reported preferences indicated that 78.6% wanted to receive it from a psychologist/psychiatrist/counsellor, mostly in case of a bad prognosis (79.4%), emotional distress (73.5%), or difficulties in accepting the possibility of treatment being unsuccessful (71.2%). The preferred time to receive PCUFT was before initiating the first cycle (73.3%), while the preferred format was in an individual (mean = 6.37, SD = 1.17; in 1-7 scale) or couple (mean = 6.34, SD = 1.24; in 1-7 scale) session. Thematic analysis showed participants would like PCUFT to provide an overview of treatment and all possible outcomes tailored to each patient's circumstances and to encompass psychosocial support, mainly focused on coping strategies to process loss and sustain hope towards the future. Willingness to receive PCUFT was associated with higher perceived benefit of building psychosocial resources and coping strategies (odds ratios (ORs) 3.40, 95% CI 1.23-9.38), lower perceived barrier of triggering negative emotions (OR 0.49, 95% CI 0.24-0.98), and stronger positive attitudes about PCUFT being beneficial and useful (OR 3.32, 95% CI 2.12-5.20). LIMITATIONS, REASONS FOR CAUTION: Self-selected sample, mainly composed of female patients who had not yet achieved their parenthood goals. The small number of participants unwilling to receive PCUFT reduced statistical power. The primary outcome variable was intentions, and research shows a moderate association between intentions and actual behaviour. WIDER IMPLICATIONS OF THE FINDINGS: Fertility clinics should provide patients with early opportunities to discuss the possibility of their treatment being unsuccessful as part of routine care. PCUFT should focus on minimizing suffering associated with grief and loss by reassuring patients they can cope with any treatment outcome, promoting coping resources, and signposting to additional support. STUDY FUNDING/COMPETING INTEREST(S): M.S.-L. holds a doctoral fellowship from the Portuguese Foundation for Science and Technology, I.P. [Fundação para a Ciência e a Tecnologia] (FCT; SFRH/BD/144429/2019). R.C. holds a post-doctoral fellowship supported by the European Social Fund (ESF) and FCT (SFRH/BPD/117597/2016). The EPIUnit, ITR and CIPsi (PSI/01662) are also financed by FCT through the Portuguese State Budget, in the scope of the projects UIDB/04750/2020, LA/P/0064/2020 and UIDB/PSI/01662/2020, respectively. Dr Gameiro reports consultancy fees from TMRW Life Sciences and Ferring Pharmaceuticals A/S, speaker fees from Access Fertility, SONA-Pharm LLC, Meridiano Congress International and Gedeon Richter, grants from Merck Serono Ltd, an affiliate of Merck KgaA, Darmstadt, Germany. TRIAL REGISTRATION NUMBER: N/A.


Assuntos
Coeficiente de Natalidade , Fertilização in vitro , Gravidez , Humanos , Feminino , Adulto , Estudos Transversais , Fertilização in vitro/métodos , Resultado do Tratamento , Nascido Vivo , Taxa de Gravidez
2.
Chem Eng J ; 405: 126651, 2021 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-32834762

RESUMO

Outdoor and indoor air pollution has become a global concern in modern society. Although many policies and regulations on air quality have been promulgated worldwide over the past decades, airborne pollution still negatively affects health and therefore the life-style of human beings. One of the strategies to challenge this problem might be reducing the amount of airborne pollutant by mineralising them via photoinduced reactions. Photocatalytic oxidation of gaseous pollutants via titanium dioxide is one of the most promising solar photochemical reactions. In this research work, by means of a green sol-gel procedure, we have coupled titania to graphene (0.5 and 1.0 wt%) aiming to increase the solar photocatalytic activity of the produced hybrid materials. Transient paramagnetic species formed upon UV-A irradiation were detected by means of EPR spectroscopy. The photocatalytic reactions were assessed by monitoring the removal of nitrogen oxides and two different volatile organic compounds (benzene and isopropanol), which has never been assessed before. Our results highlight the exceptional characteristics of the TiO2/graphene hybrid material synthesised with 1.0 wt% graphene, and its excellent suitability for multi-purpose applications in the field of environmental remediation. Compared to unmodified titania, it shows a clear enhancement in the photocatalytic removal of those hazardous pollutants, having a photocatalytic degradation rate twice higher. In addition, the same material is highly stable and shows fully recyclability over repeated tests. Hybrid titania-graphene materials could thus be exploited to grant safer outdoor and indoor environments, having thus a beneficial impact on public health and on the quality of our lives.

3.
Hum Reprod ; 33(1): 109-115, 2018 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-29186413

RESUMO

STUDY QUESTION: Do mode of conception [ART versus Natural (NC)] and depression have an interactive effect on antenatal paternal adjustment and paternal attitudes? SUMMARY ANSWER: Depression increased the negative effect of ART on antenatal paternal adjustment and paternal attitudes, specifically on antenatal marital relationship satisfaction. WHAT IS KNOWN ALREADY: Research on antenatal paternal adjustment and paternal attitudes after ART is scarce and has produced inconsistent results. STUDY DESIGN, SIZE, DURATION: This cross-sectional study assessed 197 primiparous men (71 ART and 126 NC) during their partner's second trimester of gestation. PARTICIPANTS/MATERIALS, SETTING, METHODS: Participants were derived from three larger longitudinal studies recruited at public Health Services in Northern Portugal. All men, for who this was their first child and had filled in a socio-demographic questionnaire, measures of depression and anxiety, and antenatal paternal adjustment and paternal attitudes were selected. MAIN RESULTS AND THE ROLE OF CHANCE: An interaction effect of mode of conception and depression was found on antenatal paternal adjustment and paternal attitudes. ART men showing high depressive symptomatology had lower antenatal marital relationship satisfaction than ART men showing low depressive symptomatology and NC men showing high or low depressive symptomatology. LIMITATIONS, REASONS FOR CAUTION: Due to the cross-sectional design of this study and the small sample size in the depression groups, the findings should be interpreted with caution. WIDER IMPLICATIONS OF THE FINDINGS: Specialized psychological support should be available for ART men screened with high depressive symptomatology as part of routine prenatal care appointments. STUDY FUNDING/COMPETING INTEREST(S): This study was conducted at Psychology Research Centre (UID/PSI/ 01662/2013), University of Minho, and at the Unidade de Investigação em Epidemiologia-Instituto de Saúde Pública da Universidade do Porto (EPIUnit) (UID/DTP/04750/2013). It was supported by the Foundation for Science and Technology (Portuguese Ministry of Education and Science) through National funds and co-financed by FEDER through COMPETE2020 under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007653) and through the Operational Programme Factors of Competitiveness-COMPETE within the project 'Health, Governance and Accountability in Embryo Research: Couples' Decisions About the Fates of Embryos' (FCOMP-01-0124-FEDER-014453), the FCT Investigator contract IF/01674/2015 and PhD grants (SFRH/BD/115048/2016, SFRH/BD/75807/2011 and SFRH/BD/40146/2007). The authors have no conflicts of interest.


Assuntos
Pai/psicologia , Infertilidade/psicologia , Infertilidade/terapia , Técnicas de Reprodução Assistida/psicologia , Adolescente , Adulto , Ansiedade/complicações , Atitude , Estudos Transversais , Depressão/complicações , Feminino , Humanos , Infertilidade/complicações , Masculino , Pessoa de Meia-Idade , Portugal , Gravidez , Adulto Jovem
4.
Hum Reprod ; 31(10): 2303-12, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-27609986

RESUMO

STUDY QUESTION: Does mode of conception [spontaneous/after infertility treatment (IT)], type of pregnancy (singleton/twin) and parent gender have an effect on anxiety and depression levels and trajectories during pregnancy and the post-partum period? SUMMARY ANSWER: Conception after IT was associated with a transitory increase in anxiety during the perinatal period for parents of singletons, while for IT parents of twins higher levels of psychopathological symptoms tended to persist during pregnancy and the post-partum period. WHAT IS KNOWN ALREADY: Most previous studies have shown that successful IT is not associated with poor psychological well-being during pregnancy and the post-partum period, but there is also some evidence for heightened pregnancy-related anxiety, lower self-esteem and lower self-efficacy. Parents of twins experience increased postnatal anxiety and depression. STUDY DESIGN, SIZE, DURATION: This prospective longitudinal study assessed 267 couples (N = 534) at each trimester of pregnancy, after childbirth and at 3 months post-partum. PARTICIPANTS/MATERIALS, SETTING, METHOD: The sample comprised 36 couples who had conceived after IT (19 twin pairs and 17 singletons) and 231 couples who had conceived spontaneously (SC; 28 twin pairs and 203 singletons). Couples were recruited at four public hospitals in Portugal, and self-report measures of anxiety and depression symptoms were administered. MAIN RESULTS AND THE ROLE OF CHANCE: IT parents reported higher anxiety after childbirth than parents who SC, regardless of pregnancy type. IT parents of twins showed higher anxiety at mid-pregnancy, as well as higher anxiety and depression at 3 months post-partum than IT parents of singletons. Among IT mothers, those who had twins exhibited higher depression after childbirth than those who had singletons. Differences according to mode of conception, pregnancy type and parents gender over time were also noted. During pregnancy, IT parents of twins showed no significant change in depression scores, while the other groups depression scores statistically significantly decreased over time. From pregnancy to the post-partum period, (i) IT parents showed an increase in anxiety scores, whereas SC parents exhibited no changes in anxiety scores; (ii) IT women exhibited an increase in depression scores, while SC women depression scores decreased. During the post-partum period, IT and SC parents of twins showed no changes in anxiety scores, while IT and SC parents of singletons anxiety scores declined. LIMITATIONS, REASONS FOR CAUTION: Due to the small number of IT couples, the interpretation and generalization of the results should be done with caution. WIDER IMPLICATIONS OF THE FINDINGS: The adverse impact of IT on psychopathological symptoms depends mostly on time and type of pregnancy, and is greater for twin pregnancies. These findings are important for tailoring interventions that address parents' specific needs at different moments. STUDY FUNDING/COMPETING INTERESTS: This work was supported by a grant (SFRH/BD/40146/2007) to the first author from the FCT, Foundation for Science and Technology (Portuguese Ministry of Education and Science), by the Operational Program Science and Innovation 2010 (POCI 2010) of the Community Support Board III, by FEDER Funds through the Operational Competitiveness Programme, COMPETE, and through national funding from the FCT under the projects: POCI/SAU-ESP/ 56397/2004 and PTDC/SAU/SAP/116738/2010. The authors have no conflicts of interest.


Assuntos
Ansiedade/psicologia , Depressão/psicologia , Infertilidade/psicologia , Pais/psicologia , Gravidez de Gêmeos/psicologia , Técnicas de Reprodução Assistida/psicologia , Adolescente , Adulto , Feminino , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Parto/psicologia , Período Pós-Parto/psicologia , Gravidez , Estudos Prospectivos , Adulto Jovem
5.
Strahlenther Onkol ; 191(3): 217-24, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25245468

RESUMO

BACKGROUND AND PURPOSE: Positron emission tomography (PET) with [(18)F]-fluoromisonidazole ([(18)F]-FMISO) provides a non-invasive assessment of hypoxia. The aim of this study is to assess the feasibility of a dose escalation with volumetric modulated arc therapy (VMAT) guided by [(18)F]-FMISO-PET for head-and-neck cancers (HNC). PATIENTS AND METHODS: Ten patients with inoperable stages III-IV HNC underwent [(18)F]-FMISO-PET before radiotherapy. Hypoxic target volumes (HTV) were segmented automatically by using the fuzzy locally adaptive Bayesian method. Retrospectively, two VMAT plans were generated delivering 70 Gy to the gross tumour volume (GTV) defined on computed tomography simulation or 79.8 Gy to the HTV. A dosimetric comparison was performed, based on calculations of tumour control probability (TCP), normal tissue complication probability (NTCP) for the parotid glands and uncomplicated tumour control probability (UTCP). RESULTS: The mean hypoxic fraction, defined as the ratio between the HTV and the GTV, was 0.18. The mean average dose for both parotids was 22.7 Gy and 25.5 Gy without and with dose escalation respectively. FMISO-guided dose escalation led to a mean increase of TCP, NTCP for both parotids and UTCP by 18.1, 4.6 and 8% respectively. CONCLUSION: A dose escalation up to 79.8 Gy guided by [(18)F]-FMISO-PET with VMAT seems feasible with improvement of TCP and without excessive increase of NTCP for parotids.


Assuntos
Carcinoma de Células Escamosas/radioterapia , Hipóxia Celular/efeitos da radiação , Misonidazol/análogos & derivados , Neoplasias Otorrinolaringológicas/radioterapia , Tomografia por Emissão de Pósitrons , Dosagem Radioterapêutica , Planejamento da Radioterapia Assistida por Computador/métodos , Radioterapia de Intensidade Modulada/métodos , Radioterapia/métodos , Idoso , Carcinoma de Células Escamosas/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Misonidazol/uso terapêutico , Estadiamento de Neoplasias , Neoplasias Otorrinolaringológicas/patologia , Prognóstico , Carga Tumoral/efeitos da radiação
6.
Psychol Health Med ; 20(8): 927-32, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25715641

RESUMO

Depression has been associated with sleep disturbances in pregnancy; however, no previous research has controlled the possible confounding effect of anxiety on this association. This study aims to analyze the effect of depression on sleep during the third trimester of pregnancy controlling for anxiety. The sample was composed by 143 depressed (n = 77) and non-depressed (n = 66) pregnant women who completed measures of depression, anxiety, and sleep. Differences between groups in sleep controlling for anxiety were found. Depressed pregnant women present higher number of nocturnal awakenings and spent more hours trying falling asleep during the night and the entire 24 h period. Present findings point out the effect of depression on sleep in late pregnancy, after controlling for anxiety.


Assuntos
Ansiedade/epidemiologia , Depressão/enzimologia , Complicações na Gravidez/epidemiologia , Terceiro Trimestre da Gravidez , Transtornos do Sono-Vigília/epidemiologia , Adulto , Comorbidade , Feminino , Humanos , Gravidez
7.
Psychol Med ; 44(5): 927-36, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23822932

RESUMO

BACKGROUND: This prospective cohort study explored the effects of prenatal and postpartum depression on breastfeeding and the effect of breastfeeding on postpartum depression. METHOD: The Edinburgh Postpartum Depression Scale (EPDS) was administered to 145 women at the first, second and third trimester, and at the neonatal period and 3 months postpartum. Self-report exclusive breastfeeding since birth was collected at birth and at 3, 6 and 12 months postpartum. Data analyses were performed using repeated-measures ANOVAs and logistic and multiple linear regressions. RESULTS: Depression scores at the third trimester, but not at 3 months postpartum, were the best predictors of exclusive breastfeeding duration (ß = -0.30, t = -2.08, p < 0.05). A significant decrease in depression scores was seen from childbirth to 3 months postpartum in women who maintained exclusive breastfeeding for ⩾3 months (F 1,65 = 3.73, p < 0.10, η p 2 = 0.05). CONCLUSIONS: These findings suggest that screening for depression symptoms during pregnancy can help to identify women at risk for early cessation of exclusive breastfeeding, and that exclusive breastfeeding may help to reduce symptoms of depression from childbirth to 3 months postpartum.


Assuntos
Aleitamento Materno/psicologia , Depressão Pós-Parto/prevenção & controle , Depressão/psicologia , Complicações na Gravidez/psicologia , Adulto , Aleitamento Materno/estatística & dados numéricos , Depressão/epidemiologia , Depressão Pós-Parto/epidemiologia , Feminino , Humanos , Portugal/epidemiologia , Gravidez , Complicações na Gravidez/epidemiologia , Adulto Jovem
8.
Parasite Immunol ; 36(7): 303-12, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24749785

RESUMO

Schistosoma mansoni is a blood fluke parasite responsible for schistosomiasis. The best long-term strategy to control schistosomiasis is through immunization combined with drug treatment. In this study, we cloned, expressed and purified SmTSP-2 fused to the N- and C-terminal halves of Sm29 and tested these chimeras as vaccine candidates using an adjuvant approved to be used in humans. The results demonstrated that vaccination with SmTSP-2 fused to N- or C-terminus of Sm29-induced reduction in worm burden and liver pathology when compared to control animals. Additionally, we detected high levels of mouse-specific IgG, IgG1 and IgG2a against both chimeras and significant amounts of IFN-γ and TNF-α and no IL-4. Finally, studies with sera from patients resistant to infection and living in schistosomiasis endemic areas revealed high levels of specific IgG to both chimeras when compared to healthy individuals. In conclusion, SmTSP-2/Sm29 chimeras tested here induced partial protection against infection and might be a potential vaccine candidate.


Assuntos
Antígenos de Bactérias/imunologia , Antígenos de Helmintos/imunologia , Proteínas de Bactérias/imunologia , Proteínas de Helminto/imunologia , Glicoproteínas de Membrana/imunologia , Schistosoma mansoni , Esquistossomose mansoni/imunologia , Esquistossomose mansoni/prevenção & controle , Tetraspaninas/imunologia , Vacinas/imunologia , Adjuvantes Imunológicos/administração & dosagem , Animais , Anticorpos Anti-Helmínticos/sangue , Antígenos de Bactérias/administração & dosagem , Antígenos de Helmintos/administração & dosagem , Proteínas de Bactérias/administração & dosagem , Ilhas de CpG , Citocinas/sangue , Feminino , Proteínas de Helminto/administração & dosagem , Humanos , Imunoglobulina G/sangue , Fígado/patologia , Glicoproteínas de Membrana/administração & dosagem , Camundongos , Camundongos Endogâmicos C57BL , Oligodesoxirribonucleotídeos/administração & dosagem , Proteínas Recombinantes/administração & dosagem , Proteínas Recombinantes/imunologia , Tetraspaninas/administração & dosagem , Vacinas/administração & dosagem
9.
Strahlenther Onkol ; 189(12): 1015-9, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24173497

RESUMO

BACKGROUND AND PURPOSE: Positron-emission tomography (PET) with [(18)F]-fluoromisonidazole (FMISO) permits consideration of radiotherapy dose escalation to hypoxic volumes in head and neck cancers (HNC). However, the definition of FMISO volumes remains problematic. The aims of this study are to confirm that delayed acquisition at 4 h is most appropriate for FMISO-PET imaging and to assess different methods of volume segmentation. PATIENTS AND METHODS: A total of 15 HNC patients underwent several FMISO-PET/computed tomography (CT) acquisitions 2, 3 and 4 h after FMISO injection. Three automatic methods of PET image segmentation were tested: fixed threshold, adaptive threshold based on the ratio between tumour-derived and background activities (R(T/B)) and the fuzzy locally adaptive Bayesian (FLAB) method. The hypoxic fraction (HF), which is defined as the ratio between the FMISO and CT volumes, was also calculated. RESULTS: The R(T/B) for images acquired at 2, 3 and 4 h differed significantly, with mean values of 2.5 (1.7-2.9), 3 (2-4.5) and 3.4 (2.3-6.1), respectively. The mean tumour volume, as defined manually using CT images, was 39.1 ml (1.2-116 ml). After 4 h, the mean FMISO volumes were 18.9 (0.1-81), 9.5 (0.9-33.1) and 12.5 ml (0.9-38.4 ml) with fixed threshold, adaptive threshold and the FLAB method, respectively; median HF values were 0.47 (0.1-1.93), 0.25 (0.11-0.75) and 0.35 (0.14-1.05), respectively. FMISO volumes were significantly different. CONCLUSION: The best contrast is obtained at the 4-hour acquisition time. Large discrepancies were found between the three tested methods of volume segmentation.


Assuntos
Carcinoma de Células Escamosas/diagnóstico por imagem , Carcinoma de Células Escamosas/radioterapia , Neoplasias de Cabeça e Pescoço/diagnóstico por imagem , Neoplasias de Cabeça e Pescoço/radioterapia , Misonidazol/análogos & derivados , Tomografia por Emissão de Pósitrons/métodos , Planejamento da Radioterapia Assistida por Computador/métodos , Radioterapia Guiada por Imagem/métodos , Idoso , Estudos de Viabilidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Compostos Radiofarmacêuticos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Carcinoma de Células Escamosas de Cabeça e Pescoço , Resultado do Tratamento , Carga Tumoral
10.
Parasitology ; 140(3): 396-405, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23137846

RESUMO

The factors that characterize Acanthamoeba strains as harmless or potentially pathogenic have not been elucidated. Analysing the in vitro and in vivo parameters of Acanthamoeba samples, including heat tolerance at temperatures close to that of the human body, cytopathic effects, and their ability to cause infections in animals, has been proposed to identify their pathogenic potential. Another promising criterion for differentiating strains is the analysis of their biochemical and immunochemical properties. In this study, a comparative evaluation between clinical and environmental Acanthamoeba isolates was performed on the basis of physiological, morphological, and immunochemical criteria. Crude antigens were used to characterize the protein profiles by electrophoresis and immunize mice to produce polyclonal and monoclonal antibodies. The antibodies were characterized using ELISA, Western blotting, and immunofluorescence techniques. The results obtained with polyclonal antibodies suggest the presence of specific proteins for each studied isolate and co-reactive immunochemical profiles among conserved components. Ten monoclonal antibody clones were obtained; mAb3 recognized 3 out of 4 samples studied. The results of this study may help standardize criteria for identifying and characterizing Acanthamoeba strains. Taken together, our results support the view that a set of features may help differentiate Acanthamoeba species and isolates.


Assuntos
Ceratite por Acanthamoeba/parasitologia , Acanthamoeba/classificação , Poeira/análise , Parasitologia/métodos , Acanthamoeba/imunologia , Acanthamoeba/isolamento & purificação , Acanthamoeba/ultraestrutura , Animais , Anticorpos Monoclonais/biossíntese , Anticorpos Monoclonais/imunologia , Anticorpos Antiprotozoários/biossíntese , Anticorpos Antiprotozoários/imunologia , Antígenos de Protozoários/administração & dosagem , Antígenos de Protozoários/imunologia , Antígenos de Protozoários/isolamento & purificação , Western Blotting , Eletroforese , Ensaio de Imunoadsorção Enzimática/métodos , Características da Família , Imunofluorescência , Humanos , Imunização , Camundongos , Camundongos Endogâmicos BALB C , Microscopia Eletrônica de Varredura , Proteínas de Protozoários/química , Proteínas de Protozoários/imunologia , Especificidade da Espécie
11.
Acta Trop ; 204: 105356, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32001249

RESUMO

Sequence databases on Schistosoma mansoni have revealed micro-exon gene (MEGs) families. Many of these genes are highly expressed in parasite life cycle stages associated with the mammalian host infection and appear to be involved in immune evasion by schistosomes. So, we believe that MEG-coding proteins would make potential candidates for vaccine development or diagnosis for schistosomiasis. Here, we study MEG-3.2 and MEG-3.4, members of the MEG-3 family. Recombinant (r) proteins were produced and formulated with Freund's adjuvant for vaccination of mice. Immunization with recombinant MEG-3.2 or MEG-3.4 formulation generated high levels of IgG1 antibodies. Additionally, vaccination also induced a mixed Th1/Th2/Th17-type of response, since IFN-γ, IL-5 and IL-17 cytokines were detected in the supernatant of spleen cell cultures; however it failed to induce reduction in parasitic worm burden. Finally, the recombinant proteins were evaluated in a serological assay using human samples. Schistosome-infected individuals showed higher levels of both IgG and IgM against rMEG-3.2 compared to non-infected individuals, while only IgM anti-rMEG-3.4 antibodies were elevated in infected patients. Therefore, between both studied molecules, MEG-3.2 protein is the antigen that shows potential to compose a serological diagnosis test for schistosomiasis.


Assuntos
Antígenos de Helmintos/imunologia , Schistosoma mansoni/imunologia , Esquistossomose mansoni/prevenção & controle , Animais , Modelos Animais de Doenças , Feminino , Camundongos , Camundongos Endogâmicos C57BL , Esquistossomose mansoni/sangue , Esquistossomose mansoni/diagnóstico , Vacinação
12.
Cancer Radiother ; 12(8): 809-16, 2008 Dec.
Artigo em Francês | MEDLINE | ID: mdl-19046919

RESUMO

PURPOSE: To evaluate dosimetry of helicoidal tomotherapy versus three-dimensional conformal radiotherapy (3D-CRT) with and without IMRT for the treatment of soft tissue sarcoma (STS) of the thigh. METHODS AND PATIENTS: A retrospective study was performed for three patients who received 3D-CRT as adjuvant radiation therapy for STS of the thigh. These three patients had a tumor in posterior, adductor or anterior compartment of the thigh. In each case, three treatments plans were optimised in tomotherapy, without bloc, with directional bloc and complete bloc of controlateral limb, to adequately treat the planning target volume and spare organ at risk. For each patient, we compare the three modalities of tomotherapy or "classical" IMRT from a clinac with the 3D-CRT actually performed for the treatment. RESULTS: Tomotherapy provides improved PTV coverage and dose homogeneity. This benefit was comparable in the three tomotherapy plans. The average D95% for tomotherapy and 3D-CRT were 97.6% and 94.8% respectively and the standard deviation is, at least, divided by two with conformal and is always better than performed with a clinac. The volume of the surrounding soft tissues receiving at least full prescription and hot spots, as evaluated by D2%, were significantly reduced in tomotherapy. Nevertheless, the results concerning the skin, the femur and the gonads were dependent on the tumor site in the thigh and not always improved with tomotherapy dosimetric studies. CONCLUSIONS: For this preliminary study, tomotherapy can provide better coverage and dose uniformity in PTV and minimize the volume of surrounding muscular tissues receiving high doses. However, in this study, there is no benefit for others OAR (skin, femur and gonads) except in particular constraint (for instance for a precise sparing of cutaneous or bony area). Other dosimetric studies, followed by prospective evaluations with long-term follow-up are needed to determine whether tomotherapy can improve outcome for patients with STS of the thigh.


Assuntos
Neoplasias Femorais/radioterapia , Radioterapia Conformacional/métodos , Sarcoma/radioterapia , Neoplasias de Tecidos Moles/radioterapia , Adulto , Idoso , Humanos , Masculino , Pessoa de Meia-Idade , Aceleradores de Partículas , Dosagem Radioterapêutica , Radioterapia Adjuvante/efeitos adversos , Radioterapia Conformacional/efeitos adversos , Estudos Retrospectivos , Fatores de Risco , Pele/efeitos da radiação
13.
J Med Genet ; 43(1): 91-6, 2006 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-16033918

RESUMO

BACKGROUND: An inherited germline P53 mutation has been identified in cases of childhood adrenocortical carcinoma (ACT), a neoplasm with a high incidence in southern Brazil. The penetrance of ACT in carriers of the point mutation, which encodes an arginine-to-histidine substitution at codon 337 of TP53 (R337H), has not been determined. OBJECTIVE: To investigate the penetrance of childhood ACT in carriers of the R337H TP53 mutation. METHODS: The family histories of 30 kindreds of 41 southern Brazilian children with ACT were obtained. A PCR based assay was used to detect this P53 mutation in a large number of relatives of children with ACT. In all, 927 individuals were tested for the mutation, 232 from the non-carrier and 695 (including the 40 probands) from the carrier parental lines. RESULTS: 40 children with ACT carried the TP53 R337H mutation; the remaining child with ACT was not tested. There was no evidence of Li-Fraumeni syndrome in any of the kindreds; however, seven met the criteria for Li-Fraumeni-like syndrome. The carrier parental line was identified in each kindred. Of the 695 individuals tested in the carrier parental line, 240 (34.5%) were positive for the mutation, while none of the 232 individuals in the other parental line carried the mutation. The penetrance of ACT was 9.9% (95% confidence interval, 8.7% to 11.1%). CONCLUSIONS: The TP53 R337H mutation dramatically increases predisposition to childhood ACT but not to other cancers, and explains the increased frequency of ACT observed in this geographic region.


Assuntos
Neoplasias do Córtex Suprarrenal/genética , Predisposição Genética para Doença , Mutação em Linhagem Germinativa/genética , Penetrância , Proteína Supressora de Tumor p53/genética , Distribuição por Idade , Criança , Pré-Escolar , Feminino , Genótipo , Humanos , Lactente , Masculino , Linhagem , Fatores de Risco
14.
Cancer Radiother ; 11(5): 227-33, 2007 Sep.
Artigo em Francês | MEDLINE | ID: mdl-17652004

RESUMO

INTRODUCTION: Epithelioid sarcoma is a rare type of soft tissue sarcomas with a high risk of recurrence both local and distant. The place of surgical conservative treatment and the role of radiation therapy remain controversial. PATIENTS AND METHODS: A serie of 9 consecutive patients treated with initial conservative surgery and postoperative radiotherapy (median dose of 52.8 Gy) from 1987 to 2006 in the same institution was analyzed. RESULTS: With a median follow-up of 40 months (range 15-153 months), the rate of local, nodal and distant relapse is respectively 56%, 11% and 33%. The rate of death is 44.5%. No imputation has been performed. CONCLUSION: Even with a high rate of local relapse observed, a conservative treatment doesn't seem to influence badly the overall survival (55.5% alive at 40 months). Indeed the rate of distant relapse and death are comparable with those found in the literature. Moreover relapse occurred almost within the irradiated volumes. An improvement of dose could be also discussed.


Assuntos
Sarcoma/terapia , Adolescente , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Braço , Feminino , Seguimentos , Mãos , Humanos , Joelho , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia , Músculos Peitorais , Períneo , Cuidados Pós-Operatórios , Dosagem Radioterapêutica , Radioterapia Adjuvante , Estudos Retrospectivos , Sarcoma/tratamento farmacológico , Sarcoma/mortalidade , Sarcoma/radioterapia , Sarcoma/cirurgia , Fatores de Tempo , Resultado do Tratamento
15.
Eur J Surg Oncol ; 43(6): 1117-1125, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28202211

RESUMO

BACKGROUND AND OBJECTIVES: Conservative surgery for soft-tissue sarcoma (STS) within multimodality treatment attempts to reconcile two contradictory requirements: assuring a good oncological outcome through a wide resection and preserving the function. The aim of our study is to verify whether our conservative approach to STS met these objectives. METHODS: A retrospective database analysis was performed in adults with primary limb or trunk wall STS operated in a single center from 1989 to 2012. Predictive factors for postoperative complications and functional impairment were tested in a multivariate analysis. RESULTS: 728 patients were operated (resection R0: 68%). Neoadjuvant chemotherapy (NAC) was given to 28%, postoperative radiotherapy to 70% of patients. Median follow-up was 103 months. At five years, overall survival was 80% and local recurrences 11%. Major postoperative complications occurred in 8% and functional impairment in 13% of the patients. Independent predictive factors for postoperative complications were American Society of Anesthesiologist classes 2 and 3 (OR: 2.3, CI: 1.2-4.5 and 4.0 CI: 1.7-9.3), tumor size >80 mm (OR: 2.5, CI: 1.3-4.9), tumor site (trunk wall/lower limb, OR: 4.1, CI: 1.3-13.6) and multifocal/multicompartmental spread (OR: 2, CI: 1.1-3.6). Independent predictive factors for function impairment were postoperative complications (OR: 5.3, CI: 2.8-10.1), NAC (OR: 3.6, CI: 2.2-5.8), and bone or neurovascular involvement (OR 3.3, CI 2.0-5.3), whereas Early Rehabilitation after Surgery (ERAS) improved outcome (OR: 0.5, CI: 0.3-0.9). CONCLUSION: Postoperative complications induced functional impairment. They may be reduced by acting on comorbidity factors and careful tumor evaluation prior to surgery. Furthermore, ERAS measures improved function.


Assuntos
Atividades Cotidianas , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Quimioterapia do Câncer por Perfusão Regional/métodos , Extremidades/cirurgia , Complicações Pós-Operatórias/epidemiologia , Radioterapia Adjuvante/métodos , Sarcoma/terapia , Neoplasias de Tecidos Moles/terapia , Tronco/cirurgia , Parede Abdominal , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Terapia Combinada , Dacarbazina/uso terapêutico , Doxorrubicina/uso terapêutico , Feminino , Seguimentos , Humanos , Ifosfamida/uso terapêutico , Masculino , Mesna/uso terapêutico , Pessoa de Meia-Idade , Análise Multivariada , Terapia Neoadjuvante/métodos , Estudos Retrospectivos , Fatores de Risco , Sarcoma/patologia , Neoplasias de Tecidos Moles/patologia , Taxa de Sobrevida , Parede Torácica , Carga Tumoral , Adulto Jovem
16.
Cancer Radiother ; 20(6-7): 677-84, 2016 Oct.
Artigo em Francês | MEDLINE | ID: mdl-27568294

RESUMO

The management of retroperitoneal sarcoma can be very challenging, and the quality of initial treatment strategy appears to be a crucial prognostic factor. En bloc surgery is currently the standard of care for these rare tumours and perioperative treatments such as chemotherapy or radiotherapy have not been validated yet. However, local-regional relapse constitutes the most common disease course. While adjuvant radiotherapy is less and less common due to gastrointestinal toxicities, preoperative radiation therapy offers numerous advantages and is being evaluated as part of a national multicentre phase II study (TOMOREP trial) and is the subject of a European randomized phase III study (STRASS trial). The objective of this article is to present data on preoperative irradiation in terms of dose, volumes and optimal radiotherapy techniques for the treatment of this rare disease.


Assuntos
Neoplasias Retroperitoneais/radioterapia , Sarcoma/radioterapia , Humanos , Margens de Excisão , Terapia Neoadjuvante , Órgãos em Risco , Dosagem Radioterapêutica , Radioterapia Adjuvante , Radioterapia Guiada por Imagem , Radioterapia de Intensidade Modulada , Neoplasias Retroperitoneais/cirurgia , Sarcoma/cirurgia
17.
Eur J Cancer ; 65: 109-12, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27494036

RESUMO

The long-term results of the EORTC 24954 trial comparing sequential versus alternating chemotherapy and radiotherapy (RT) for patients with locally advanced laryngeal and hypopharyngeal cancer are reported. From 1996 to 2004, 450 patients were randomly assigned (1-1) to a sequential arm (SA = induction cisplatin-5fluorouracil followed by a 70Gy-RT for the responders or a total laryngectomy and post-operative RT for the non-responders) and an alternating arm (AA = cisplatin-5fluorouracil alternated with three 2-week courses of 20 Gy-RT for a total dose of 60 Gy). Median follow-up was 10.2 years. Ten-year survival with functional larynx (primary end-point) and overall survival were similar in both arms (18.7% and 33.6% in SA versus 18.3% and 31.6% in AA). Late toxicity was also similar; however, a trend for higher larynx preservation and better laryngeal function was observed in AA.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/terapia , Quimiorradioterapia/métodos , Neoplasias Hipofaríngeas/terapia , Neoplasias Laríngeas/terapia , Laringe , Tratamentos com Preservação do Órgão/métodos , Adulto , Idoso , Carcinoma de Células Escamosas/patologia , Cisplatino/administração & dosagem , Progressão da Doença , Fracionamento da Dose de Radiação , Feminino , Fluoruracila/administração & dosagem , Humanos , Neoplasias Hipofaríngeas/patologia , Neoplasias Laríngeas/patologia , Laringectomia , Masculino , Pessoa de Meia-Idade , Análise de Sobrevida , Adulto Jovem
18.
J Clin Oncol ; 22(5): 838-45, 2004 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-14990639

RESUMO

PURPOSE: We created a registry for pediatric adrenocortical tumors (ACTs), which are rare and are not well characterized. We provide a descriptive analysis of 254 patients registered on the International Pediatric Adrenocortical Tumor Registry. PATIENTS AND METHODS: Between January 1990 and December 2001, 254 patients younger than 20 years of age with newly diagnosed or previously treated ACTs were registered. A histologic diagnosis of ACT was required, although central review was not mandatory. Follow-up information was periodically requested from the referring physician. Treatment was chosen by the primary physician. RESULTS: The overall female-male ratio was 1.6:1, but it varied widely among age groups. The most common presenting sign (84.2%) was virilization. Cushing's syndrome without virilization was uncommon (5.5%). Tumors were completely resected in 83% of patients. Patients with disseminated or residual disease received mitotane, cisplatin, etoposide, and/or doxorubicin, and rarely, radiation therapy. At a median follow-up of 2 years and 5 months, 157 patients (61.8%) survived without evidence of disease and 97 patients (38.2%) had died. The 5-year event-free survival estimate was 54.2% (95% CI, 48.2% to 60.2%). In a multivariate analysis, disease stage, presenting signs of endocrine dysfunction, and age were independently associated with prognosis. CONCLUSION: Childhood ACTs occur predominantly in females and almost always causes clinical signs. Complete resection is required for cure. Residual or metastatic disease carries a poor prognosis. Our results demonstrate the feasibility of a disease-specific database for obtaining meaningful clinical and outcome information.


Assuntos
Neoplasias do Córtex Suprarrenal/patologia , Neoplasias do Córtex Suprarrenal/terapia , Carcinoma Adrenocortical/patologia , Carcinoma Adrenocortical/terapia , Adolescente , Neoplasias do Córtex Suprarrenal/mortalidade , Adrenalectomia/métodos , Carcinoma Adrenocortical/mortalidade , Adulto , Fatores Etários , Biópsia por Agulha , Quimioterapia Adjuvante , Criança , Pré-Escolar , Terapia Combinada , Intervalos de Confiança , Intervalo Livre de Doença , Feminino , Humanos , Cooperação Internacional , Masculino , Estadiamento de Neoplasias , Probabilidade , Prognóstico , Modelos de Riscos Proporcionais , Sistema de Registros , Estudos Retrospectivos , Medição de Risco , Fatores Sexuais , Análise de Sobrevida , Resultado do Tratamento
19.
J Med Genet ; 41(5): 354-9, 2004 May.
Artigo em Inglês | MEDLINE | ID: mdl-15121773

RESUMO

The R337H TP53 mutation is a low-penetrance molecular defect that predisposes to adrenocortical tumour (ACT) formation in Brazilian and possibly other populations. Additional genetic defects may be responsible for the variable expression of ACTs in these cases. The inhibin alpha-subunit gene (INHA) on 2q33-qter has been implicated in mouse adrenocortical tumourigenesis. We studied 46 pediatric patients with ACTs from Brazil for INHA genetic alterations; 39 of these patients were heterozygous carriers of the R337H TP53 mutation. We first mapped the INHA gene by radiation hybrid analysis and determined 10 linked microsatellite markers in an area flanked by D2S1371 and D2S206 on 2q33-qter. These markers were then used for loss of heterozygozity (LOH) studies in nine paired germline and tumour DNA samples. Mapping placed the INHA gene in close proximity to D2S2848 (SHGC11864) with a log of odds (LOD) score of 5.84. LOH for at least one marker in the region was identified in 8/9 tumours (89%). Six patients were heterozygous for three INHA mutations: one in exon 1, 127C>G, and two in exon 2, 3998G>A and 4088G>A, all leading to amino acid substitutions (P43A, G227R, and A257T, respectively). A257T is located in a conserved INHA region, highly homologous to transforming growth factor-beta; both G227R and A257T change polarity, and, in addition, G227R changes the pH. We conclude that these sequence alterations and the detected 2q allelic changes suggest that INHA may be one of the contributing factors needed for ACT formation in pediatric patient carriers of the R337H TP53 mutation.


Assuntos
Neoplasias do Córtex Suprarrenal/genética , Genes p53 , Inibinas/genética , Mutação , Substituição de Aminoácidos , Criança , Mapeamento Cromossômico , Análise Mutacional de DNA , Heterozigoto , Humanos , Perda de Heterozigosidade
20.
Ann Endocrinol (Paris) ; 76(1 Suppl 1): 1S40-6, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26826482

RESUMO

OBJECTIVES: To study the various local treatments available for thyroid cancer metastases, investigate techniques and assess their advantages and limitations and roles in the overall treatment strategy for metastatic disease. RESULTS: We investigated metastases surgery, external radiation therapy, embolization, chemoembolization, cementoplasty, radiofrequency ablation and cryotherapy, describing techniques, advantages and drawbacks and possible complications. Indications were reviewed according to metastases location, and the roles of the various techniques are discussed in the overall treatment strategy for thyroid cancer metastases. Despite the advent of new targeted therapies, local treatment still has an important role to play: either palliative or, in oligometastatic involvement, curative. Even in extensive disease, it may allow postponement of tyrosine kinase inhibitor therapy, which, once initiated, has to be continued life-long, is expensive and is not free of side-effects.


Assuntos
Metástase Neoplásica/terapia , Neoplasias da Glândula Tireoide/patologia , Técnicas de Ablação , Cementoplastia , Crioterapia , Embolização Terapêutica , Humanos , Radioterapia
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