Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 72
Filtrar
Mais filtros

Tipo de documento
Intervalo de ano de publicação
1.
Breast Cancer Res ; 25(1): 78, 2023 06 29.
Artigo em Inglês | MEDLINE | ID: mdl-37386484

RESUMO

BACKGROUND: New drugs for locally advanced or metastatic breast cancer have led to clinical benefits, aside with increasing costs to healthcare systems. The current financing model for health technology assessment (HTA) privileges real-world data. As part of the ongoing HTA, this study aimed to evaluate the effectiveness of palbociclib with aromatase inhibitors (AI) and compare it with the efficacy reported in PALOMA-2. METHODS: A population-based retrospective exposure cohort study was conducted including all patients initiating treatment in Portugal with palbociclib under early access use and registered in the National Oncology Registry. The primary outcome was progression free survival (PFS). Secondary outcomes considered included time to palbociclib failure (TPF), overall survival (OS), time to next treatment (TTNT), and proportion of patients discontinuing treatment due to  adverse events (AEs). The Kaplan-Meier method was used and median, 1- and 2-year survival rates were computed, with two-sided 95% confidence intervals (95%CI). STrengthening the Reporting of OBservational studies in Epidemiology (STROBE) guidelines for reporting observational studies were used. RESULTS: There were 131 patients included. Median follow-up was 28.3 months (IQR: 22.7-35.2) and median duration of treatment was 17.5 months (IQR: 7.8-29.1). Median PFS was 19.5 months (95%CI 14.2-24.2), corresponding to a 1-year PFS rate of 67.9% (95%CI 59.2-75.2) and a 2-year PFS rate of 42.0% (95%CI 33.5-50.3). Sensitivity analysis showed median PFS would increase slightly when excluding those not initiating treatment with the recommended dose, raising to 19.8 months (95%CI 14.4-28.9). By considering only patients meeting PALOMA-2 criteria, we could observe a major difference in treatment outcomes, with a mean PFS of 28.8 months (95%CI 19.4-36.0). TPF was 19.8 months (95%CI 14.2-24.9). Median OS was not reached. Median TTNT was 22.5 months (95%CI 18.0-29.8). A total of 14 patients discontinued palbociclib because of AEs (10.7%). CONCLUSIONS: Data suggest palbociclib with AI to have an effectiveness of 28.8 months, when used in patients with overlapping characteristics to those used in PALOMA-2. However, when used outside of these eligibility criteria, namely in patients with less favorable prognosis (e.g., presence of visceral disease), the benefits are inferior, even though still favorable.


Assuntos
Inibidores da Aromatase , Neoplasias da Mama , Humanos , Feminino , Inibidores da Aromatase/efeitos adversos , Estudos Retrospectivos , Neoplasias da Mama/tratamento farmacológico , Estudos de Coortes
2.
Molecules ; 28(17)2023 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-37687146

RESUMO

Since the occurrence of tumours is closely associated with the telomerase function and oncogene expression, the structure of such enzymes and genes are being recognized as targets for new anticancer drugs. The efficacy of several ligands in telomerase inhibition and in the regulation of genes expression, by an effective stabilisation of G-quadruplexes (G4) DNA structures, is being considered as a promising strategy in cancer therapies. When evaluating the potential of a ligand for telomerase inhibition, the selectivity towards quadruplex versus duplex DNA is a fundamental attribute due to the large amount of double-stranded DNA in the cellular nucleus. This study reports the evaluated efficacy of three tetracationic opp-dibenzoporphyrins, a free base, and the corresponding zinc(II) and nickel(II) complexes, to stabilise G4 structures, namely the telomeric DNA sequence (AG3(T2AG3)3). In order to evaluate the selectivity of these ligands towards G4 structures, their interaction towards DNA calf thymus, as a double-strand DNA sequence, were also studied. The data obtained by using different spectroscopic techniques, such as ultraviolet-visible, fluorescence, and circular dichroism, suggested good affinity of the free-base porphyrin and of its zinc(II) complex for the considered DNA structures, both showing a pattern of selectivity for the telomeric G4 structure. A pattern of aggregation in aqueous solution was detected for both Zn(II) and Ni(II) metallo dibenzoporphyrins and the ability of DNA sequences to induce ligand disaggregation was observed.


Assuntos
Quadruplex G , Telomerase , Ligantes , DNA , Telômero/genética
3.
J Sex Med ; 19(4): 620-628, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35165051

RESUMO

BACKGROUND: Pleasure-seeking reasons are the main drivers of pornography use (PU), but the regulation of unpleasant states, namely distraction from or suppression of negative emotions and stress relief, are other potential predictors of this behavior. AIM: Our main objective is to develop an explanatory model of problematic PU, assessing difficulties in emotion regulation, loneliness, perceived stress, as well as age and gender as predictors. METHODS: A cross-sectional study was conducted that included a total of 340 participants (M = 28.50 years, SD = 10.32). Self-report inventories were administered that measured problematic PU (PPCS), difficulties in emotion regulation (DERS-SF), loneliness (UCLALS-3), and perceived stress (PSS-10). RESULTS: The findings were indicative of recreational PU, with only a small number of participants (4.6%) reporting a possible problematic PU. There were statistically significant gender differences (F(1,337) = 33.306, P ≤ .001), namely that men were more likely to report problematic PU (M = 36.03, SD = 21.30) than women (M = 25.32, SD = 9.24). Problematic PU was significantly and positively correlated either with difficulties in emotion regulation, loneliness, perceived stress and age. Stepwise multiple linear regression analysis showed that difficulties in emotion regulation (ß = 0.259, P ≤ .001), loneliness (ß = 0.209, P = .001), and gender (ß = -0.377, P ≤ .001) define the best subset of predictors of problematic PU. Age and perceived stress were not selected as predictors in this subset. CLINICAL TRANSLATION: The promotion of better emotion regulation abilities and strategies for adaptive coping with loneliness must be taken into consideration, namely in cases of problematic PU or compulsive sexual behavior disorder. STRENGTHS & LIMITATIONS: Being a cross-sectional study with a convenience sample and the fact that these variables explain only a part of the explained variance of the problematic PU are the main limitations. Despite the limitations, the principal contribution of this study is the understanding that gender, difficulties in emotion regulation, and loneliness remain as main predictors of problematic PU, even when combined in the explanatory model. CONCLUSION: The current study provides a better understanding of the predictors of problematic PU related with the reduction or avoidance of unpleasant states. Emotion regulation, loneliness, and perceived stress, studied simultaneously, provide a better understanding of the complex relationships between these factors and problematic PU. Difficulties in emotion regulation and loneliness are predictors of higher problematic PU, as well as the expected gender effect. Cardoso J, Ramos C, Brito J, et al. Predictors of Pornography Use: Difficulties in Emotion Regulation and Loneliness. J Sex Med 2022;19:620-628.


Assuntos
Regulação Emocional , Transtornos Parafílicos , Estudos Transversais , Literatura Erótica/psicologia , Feminino , Humanos , Solidão , Masculino , Transtornos Parafílicos/psicologia
4.
Bioorg Chem ; 122: 105703, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35248982

RESUMO

Telomerase, oncogenes and tumor suppressors are closely associated with tumour occurrence, therefore these structures are being recognized as targets for the development of new anticancer drugs. The efficacy of several molecules in telomerase inhibition and regulation of genes expression, by adduct formation with G-quadruplexes (G4), has been studied by biophysical and biochemical methods with promising results. We report here the synthesis and structural characterization of a small positively charged diketopyrrolo[3,4-c]pyrrole derivative, identified as DPP(PyMe)2, that showed very promising results as G4 stabilizing ligand. The data obtained from UV-Vis and fluorescence experiments suggest that DPP(PyMe)2 presents high affinity to G4 structures. Docking studies and molecular dynamics simulations unraveled the binding modes of the ligand with four G4 structures. The obtained results also allowed us to conclude that the DPP(PyMe)2 ligand binds into the top G-tetrad or in a mixed binding mode depending on the GQ structure. A remarkable selectivity of DPP(PyMe)2 for c-MYC and KRAS 32R in the presence of ds26 was observed by circular dichroism (CD) and fluorescence resonance energy transfer (FRET) melting experiments. CD titrations revealed a stabilization higher than 30 °C in the case of c-MYC G4 structure and, for the same sequence, DPP(PyMe)2 showed the ability to block the activity of Taq polymerase in a dose-dependent manner. The subcellular localization obtained with confocal microscopy corroborates the results obtained by the other techniques and the obtained data suggest that DPP(PyMe)2 is an attractive ligand for the development of G4 labelling probes.


Assuntos
Quadruplex G , DNA/química , Ligantes , Pirróis/farmacologia , Telômero
5.
Int J Mol Sci ; 23(21)2022 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-36362367

RESUMO

Details on the unexpected formation of two new (dimethylamino)methyl corrole isomers from the reaction of 5,10,15-tris(pentafluorophenyl)corrolatogallium(III) with sarcosine and paraformaldehyde are presented. Semi-empirical calculations on possible mechanism pathways seem to indicate that the new compounds are probably formed through a Mannich-type reaction. The extension of the protocol to the free-base 5,10,15-tris(pentafluorophenyl)corrole afforded an unexpected new seven-membered ring corrole derivative, confirming the peculiar behavior of corroles towards known reactions when compared to the well-behaved porphyrin counterparts.


Assuntos
Porfirinas , Sarcosina , Porfirinas/química , Isomerismo
6.
Anim Cogn ; 24(1): 23-32, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32651650

RESUMO

Learning can occur through self-experience with the environment, or through the observation of others. The latter allows for adaptive behaviour without trial-and-error, thus maximizing individual fitness. Perhaps given their mostly solitary lifestyle, cuttlefish have seldomly been tested under observational learning scenarios. Here we used a multi-treatment design to disentangle if and how neurally immature cuttlefish Sepia officinalis hatchlings (up to 5 days) incorporate social information into their decision-making, when performing a task where inhibition of predatory behaviour is learned. In the classical social learning treatment using pre-trained demonstrators, observers did not register any predatory behaviour. In the inhibition by social learning treatment, using naïve (or sham) demonstrators, more observers than demonstrators learned the task, while also reaching learning criterion in fewer trials, and performing less number of attacks per trial. Moreover, the performance of demonstrator-observer pairs was highly correlated, indicating that the mere presence of conspecifics did not explain our results by itself. Additionally, observers always reported higher latency time to attack during trials, a trend that was reversed in the positive controls. Lastly, pre-exposure to the stimulus did not improve learning rates. Our findings reveal the vicarious capacity of these invertebrate newborns to learn modulation (inhibition) of predatory behaviour, potentially through emulation (i.e. affordance learning). Despite ongoing changes on neural organization during early ontogeny, cognitively demanding forms of learning are already present in cuttlefish newborns, facilitating behavioural adaptation at a critical life stage, and potentially improving individual fitness in the environment.


Assuntos
Sepia , Aprendizado Social , Animais , Decapodiformes , Inibição Psicológica , Aprendizagem
7.
Pharmacoepidemiol Drug Saf ; 30(3): 342-349, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33103788

RESUMO

OBJECTIVES: To evaluate the effectiveness and safety of pembrolizumab use in advanced melanoma in a real-life context; and to explore the existence of an efficacy-effectiveness gap, comparing registry data with the reference clinical trial. METHODS: This study followed the guidelines for good pharmacoepidemology practice. An ambispective cohort was constituted, initiating the observation upon drug approval (17/07/2015) and following exposed patients until death or cut-off date (15/11/2019). The primary outcome was overall survival (OS); secondary outcomes comprised progression-free survival (PFS), overall response rate (ORR) and the occurrence of adverse events (AE). For all survival analyses, the Kaplan-Meier estimator was used, considering a 95% confidence interval (CI), aside with one-year survival rates. RESULTS: A total of 125 patients constituted the cohort, originating from 16 hospitals in Portugal. Median OS was estimated to be 16.9 months (CI95% 11.3-25.5) and the probability of survival after 1 year was 57.5% (CI95% 48.4%-65.6%). Median PFS was estimated to be 4.8 months (CI95% 3.9-6.7) and the probability of remaining progression-free after 1 year was 32.8% (CI95% 24.8-41.1). ORR was 30.4% (CI95% 22.5%-39.3%). AEs were experienced by 82% of patients, and 27% experienced AE≥ grade 3. CONCLUSIONS: Our data suggest lower effectiveness in a real-life context than the efficacy reported in the clinical trial. Safety data seems, however, quite comparable to KEYNOTE-006.


Assuntos
Antineoplásicos Imunológicos , Melanoma , Anticorpos Monoclonais Humanizados , Antineoplásicos Imunológicos/efeitos adversos , Humanos , Melanoma/tratamento farmacológico , Portugal/epidemiologia , Sistema de Registros
8.
Eur J Appl Physiol ; 121(4): 1219-1232, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33564963

RESUMO

PURPOSE: Carbohydrate (CHO) restriction could be a potent metabolic regulator of endurance exercise-induced muscle adaptations. Here, we determined whether post-exercise CHO restriction following strenuous exercise combining continuous cycling exercise (CCE) and sprint interval exercise could affect the gene expression related to mitochondrial biogenesis and oxidative metabolism in human skeletal muscle. METHODS: In a randomized cross-over design, 8 recreationally active males performed two cycling exercise sessions separated by 4 weeks. Each session consisted of 60-min CCE and six 30-s all-out sprints, which was followed by ingestion of either a CHO or placebo beverage in the post-exercise recovery period. Muscle glycogen concentration and the mRNA levels of several genes related to mitochondrial biogenesis and oxidative metabolism were determined before, immediately after, and at 3 h after exercise. RESULTS: Compared to pre-exercise, strenuous cycling led to a severe muscle glycogen depletion (> 90%) and induced a large increase in PGC1A and PDK4 mRNA levels (~ 20-fold and ~ 10-fold, respectively) during the acute recovery period in both trials. The abundance of the other transcripts was not changed or was only moderately increased during this period. CHO restriction during the 3-h post-exercise period blunted muscle glycogen resynthesis but did not increase the mRNA levels of genes associated with muscle adaptation to endurance exercise, as compared with abundant post-exercise CHO consumption. CONCLUSION: CHO restriction after a glycogen-depleting and metabolically-demanding cycling session is not effective for increasing the acute mRNA levels of genes involved in mitochondrial biogenesis and oxidative metabolism in human skeletal muscle.


Assuntos
Carboidratos da Dieta/farmacologia , Músculo Esquelético/metabolismo , Biogênese de Organelas , Condicionamento Físico Humano/métodos , Adulto , Dieta com Restrição de Carboidratos/efeitos adversos , Dieta com Restrição de Carboidratos/métodos , Carboidratos da Dieta/administração & dosagem , Glicogênio/metabolismo , Humanos , Masculino , Mitocôndrias Musculares/metabolismo , Músculo Esquelético/efeitos dos fármacos , Músculo Esquelético/fisiologia , Coativador 1-alfa do Receptor gama Ativado por Proliferador de Peroxissomo/genética , Coativador 1-alfa do Receptor gama Ativado por Proliferador de Peroxissomo/metabolismo , Condicionamento Físico Humano/efeitos adversos , Piruvato Desidrogenase Quinase de Transferência de Acetil/genética , Piruvato Desidrogenase Quinase de Transferência de Acetil/metabolismo
9.
Clin Gerontol ; 44(3): 249-258, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33478374

RESUMO

Objectives: The present study aims to assess the relationship between age and sexual satisfaction in older women and testing the potential mediating role of conservative sexual beliefs on this association.Methods: A total of 106 women (Mage = 68.71; SD = 6.31) completed measures of sexual beliefs (SDBQ), sexual functioning (FSFI), and sexual satisfaction (GMSEX). Bivariate correlation analyses were performed to assess the association between age, sexual conservatism, sexual satisfaction, and sexual function. Mediation analysis with bootstrap samples was performed to test the mediating effect of sexual conservatism.Results: Findings suggest a mediating effect of conservative sexual beliefs on the relationship between age and sexual satisfaction in a community-based sample of older women (F(3,102) = 9.31, p <.001, R2 = .215).Conclusions: The negative association between sexual conservatism and sexual satisfaction of the participants, and the non-significance of the direct effect of age in sexual satisfaction when including sexual conservatism in the mediation model, highlight the relevance of cognitive factors in sexual health in later life.Clinical Implications: Results such as the mediating role of sexual conservatism on the relationship between age and sexual satisfaction provide opportunities for developing and testing sexual health programs based on the demystification of sexual beliefs.


Assuntos
Análise de Mediação , Orgasmo , Idoso , Estudos Transversais , Feminino , Humanos , Comportamento Sexual , Inquéritos e Questionários
10.
Bioorg Chem ; 100: 103920, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32413624

RESUMO

The G-quadruplex (G4)-forming sequence within the AS1411 derivatives with alternative nucleobases and backbones can improve the chemical and biological properties of AS1411. Zn(II) phthalocyanine (ZnPc) derivatives have potential as high-affinity G4 ligands because they have similar size and shape to the G-quartets. The interactions of four Zn(II) phthalocyanines with the G4 AS1411 aptamer and its derivatives were determined by biophysical techniques, molecular docking and gel electrophoresis. Cell viability assay was carried out to evaluate the antiproliferative effects of Zn(II) phthalocyanines and complexes. CD experiments showed structural changes after addition of ZnPc 4, consistent with multiple binding modes and conformations shown by NMR and gel electrophoresis. CD melting confirmed that ZnPc 2 and ZnPc 4, both containing eight positive charges, are able to stabilize the AT11 G4 structure (ΔTm > 30 °C and 18.5 °C, respectively). Molecular docking studies of ZnPc 3 and ZnPc 4 suggested a preferential binding to the 3'- and 5'-end, respectively, of the AT11 G4. ZnPc 3 and its AT11 and AT11-L0 complexes revealed pronounced cytotoxic effect against cervical cancer cells and no cytotoxicity to normal human cells. Zn(II) phthalocyanines provide the basis for the development of effective therapeutic agents as G4 ligands.


Assuntos
Antineoplásicos/química , Antineoplásicos/farmacologia , Indóis/química , Indóis/farmacologia , Oligodesoxirribonucleotídeos/química , Oligodesoxirribonucleotídeos/farmacologia , Compostos Organometálicos/química , Compostos Organometálicos/farmacologia , Aptâmeros de Nucleotídeos/química , Aptâmeros de Nucleotídeos/farmacologia , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Quadruplex G , Células HeLa , Humanos , Isoindóis , Simulação de Acoplamento Molecular , Neoplasias/tratamento farmacológico , Compostos de Zinco
11.
Pharmacoepidemiol Drug Saf ; 29(10): 1295-1302, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32844487

RESUMO

PURPOSE: Immunotherapy is promising for lung cancer treatment, although at significant financial impact. The aim of this study was to evaluate the effectiveness and the efficacy-effectiveness gap of pembrolizumab in previously treated non-small cell lung cancer (NSCLC). METHODS: A population-based ambispective cohort study was conducted. Cases of interest were identified through the National Cancer Registry database and additional data sources. Patients aged ≥18 years, diagnosed with NSCLC and exposed to pembrolizumab, between 23 June 2016 and 31 October 2018, as second or later lines of treatment for advanced disease were included. Patients were followed-up until death or cut-off date (30 April 2019). Primary outcome was overall survival (OS). Secondary outcomes were progression-free survival (PFS), event-free survival (EFS), and adverse events (AEs) leading to treatment discontinuation. The efficacy-effectiveness gap was evaluated comparing results with clinical trial data. RESULTS: A total of 181 patients were included. Median age was 63 years (range 33-94); 74.6% were male. Median treatment duration was 5.6 months (interquartile range: 1.4-10.4) and, at cut-off date, treatment had been discontinued in 141 patients, mainly due to disease progression. Median OS was 13.0 months (95% confidence interval [CI] 9.3-15.9) and 1-year OS was 53.1% (95% CI 45.2%-60.3%). Median PFS was 5.6 months (95% CI 4.6-7.2), median EFS was 4.7 months (95% CI 3.2-6.0), and treatment was discontinued due to AE in 8.3% of cases (n = 15). The efficacy-effectiveness gap seems to favor pembrolizumab use in clinical practice. CONCLUSION: Real-world data suggest the performance of pembrolizumab to reflect the clinical trial outcomes in previously treated NSCLC.


Assuntos
Anticorpos Monoclonais Humanizados/administração & dosagem , Antineoplásicos Imunológicos/administração & dosagem , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Monoclonais Humanizados/efeitos adversos , Antineoplásicos Imunológicos/efeitos adversos , Estudos de Coortes , Progressão da Doença , Intervalo Livre de Doença , Feminino , Humanos , Imunoterapia/métodos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Taxa de Sobrevida , Resultado do Tratamento
12.
J Sex Med ; 16(7): 1018-1028, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31010779

RESUMO

INTRODUCTION: 10% of the world's population suffers from chronic kidney disease. Kidney transplants provide an improvement in the quality of life of those patients. Sexual dysfunction is common after kidney transplantation, and its etiology is presumed to be multifactorial. It has a negative impact on sexual satisfaction and health-related quality-of-life. The integration of a new organ into the body can imply an adjustment of body image, which may eventually have a negative influence on intimacy and sexual behaviors. AIM: To evaluate male sexual function, sexual satisfaction, and body image satisfaction among a convenience sample of patients who have had a kidney transplant. METHODS: This is a cross-sectional study that included 460 patients, from a single healthcare center, who had undergone a kidney transplant procedure >4 weeks ago. A total of 112 respondents (mean = 55.5 years, SD = 11.4) answered the questionnaires properly. MAIN OUTCOME MEASURES: All recruited patients answered a self-reported sociodemographic questionnaire, in addition to the International Index of Erectile function, the New Scale of Sexual Satisfaction, the Brief Symptom Inventory, and the Body Image Scale. RESULTS: A correlation was found between sexual function and sexual satisfaction (r = 0.598, P < .001, n = 112), as well as between body image satisfaction and sexual function (r = -0.193, P = .042, n = 112). The length of time after a kidney transplant (≤ or >36 months) was not associated with a difference in sexual functioning or sexual satisfaction. CLINICAL IMPLICATIONS: This study showed the obvious implications of sexual function on sexual satisfaction, which should alert healthcare professionals to the importance of identifying and managing sexual dysfunction in patients with chronic kidney disease, to optimize their global and sexual health satisfaction. STRENGTH & LIMITATIONS: This study identified a high prevalence of sexual dysfunction among kidney transplant recipients. This should reinforce the need for the medical community to evaluate the quality-of-life domains of patients with chronic disease. There is still a lack of information concerning any longitudinal evaluation of kidney transplant patients' sexual function and the effects that this surgery has on sexuality. CONCLUSIONS: This study corroborated the severe effects that kidney transplant patients often report regarding their sexuality. Among the patients who participated in the study, sexual function proved to be relevant in relation to sexual satisfaction. Mota RL, Fonseca R, Santos JC, et al. Sexual Dysfunction and Satisfaction in Kidney Transplant Patients. J Sex Med 2019;16:1018-1028.


Assuntos
Transplante de Rim , Orgasmo , Comportamento Sexual , Disfunções Sexuais Fisiológicas/etiologia , Adulto , Idoso , Imagem Corporal , Estudos Transversais , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Autorrelato , Saúde Sexual , Sexualidade , Inquéritos e Questionários
13.
J Sex Marital Ther ; 45(7): 594-603, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30912476

RESUMO

We aimed to analyze the factor structure and the psychometric properties of the Portuguese version of the Cyber Pornography Use Inventory-9 (CPUI-9) and to verify the invariance between men and women. A total sample of 257 university students (153 women and 104 men) participated through a web survey. The results of confirmatory factor analysis showed that the three-factor structure of the original version of the CPUI-9 has a good model fit and good convergent and discriminant validities. The findings of the multigroup confirmatory factor analysis demonstrated non-invariance on factor structure across both genders, suggesting that the CPUI-9 should be applied with caution to men and women.


Assuntos
Literatura Erótica/psicologia , Internet , Inquéritos e Questionários/normas , Adulto , Feminino , Humanos , Masculino , Portugal , Psicometria , Adulto Jovem
14.
J Clin Periodontol ; 46(12): 1183-1191, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31446628

RESUMO

AIM: To investigate the psychometric properties of the validated Portuguese version of the Brief Illness Perception Questionnaire (Brief-IPQ) in patients with gingivitis and periodontitis. MATERIAL AND METHODS: This study enrolled 571 patients with periodontal diseases (PDs) (67 gingivitis and 504 periodontitis cases), in a population-based epidemiologic survey conducted at the health centres in the South Lisbon Metropolitan Area. Brief-IPQ, a 9-item self-reported scale, reliability was evaluated using Cronbach's alpha. Confirmatory factor analysis (CFA) was used to construct validation. Multigroup analysis tested invariance across gender. RESULTS: The Brief-IPQ showed acceptable reliability (α = .80). Confirmatory factor analysis revealed good model fit (χ2 (16) = 41.236, GFI = 0.982, CFI = 0.985, RMSEA = 0.053). All factors loaded similarly to the original Brief-IPQ scale, with the exception of the "personal control" domain. Periodontal patients downgrade its illness and likely impact. The "consequences" domain showed significant positive correlations with all factors, except "treatment control" and "understanding" domains. The "concern" and "emotional response" domains had the highest significant correlation. Multigroup analysis findings supported factor invariance across the sex groups. CONCLUSION: The Brief-IPQ revealed acceptable reliability, construct factorial validity and invariance across gender. This short instrument may be used as an easily applicable and valuable tool to determine illness perception in patients with PDs.


Assuntos
Doenças Periodontais , Análise Fatorial , Humanos , Psicometria , Reprodutibilidade dos Testes , Inquéritos e Questionários
15.
Molecules ; 24(4)2019 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-30781675

RESUMO

The stabilization of G-Quadruplex DNA structures by ligands is a promising strategy for telomerase inhibition in cancer therapy since this enzyme is responsible for the unlimited proliferation of cancer cells. To assess the potential of a compound as a telomerase inhibitor, selectivity for quadruplex over duplex DNA is a fundamental attribute, as the drug must be able to recognize quadruplex DNA in the presence of a large amount of duplex DNA, in the cellular nucleus. By using different spectroscopic techniques, such as ultraviolet-visible, fluorescence and circular dichroism, this work evaluates the potential of a series of multicharged phthalocyanines, bearing four or eight positive charges, as G-Quadruplex stabilizing ligands. This work led us to conclude that the existence of a balance between the number and position of the positive charges in the phthalocyanine structure is a fundamental attribute for its selectivity for G-Quadruplex structures over duplex DNA structures. Two of the studied phthalocyanines, one with four peripheral positive charges (ZnPc1) and the other with less exposed eight positive charges (ZnPc4) showed high selectivity and affinity for G-Quadruplex over duplex DNA structures and were able to accumulate in the nucleus of UM-UC-3 bladder cancer cells.


Assuntos
DNA/química , Inibidores Enzimáticos/química , Corantes Fluorescentes/química , Quadruplex G/efeitos dos fármacos , Indóis/química , Linhagem Celular Tumoral , Complexos de Coordenação/química , Humanos , Isoindóis , Ligantes , Espectrometria de Fluorescência/métodos , Relação Estrutura-Atividade , Telomerase/antagonistas & inibidores , Zinco/química
16.
Psychooncology ; 27(1): 258-264, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-28743174

RESUMO

OBJECTIVE: This longitudinal study tested the effectiveness of a group intervention designed to facilitate posttraumatic growth (PTG). METHODS: Sample consisted of 205 women diagnosed with non-metastatic breast cancer who were either assigned to an intervention group (n = 58) or to a control group (n = 147). PTG, challenge to core beliefs, and rumination (intrusive and deliberate) were assessed at baseline (T1), at 6 months (T2), and at 12 months after baseline (T3). RESULTS: Results from the Latent Growth Modeling suggested that participants from the intervention group have higher levels of PTG. The challenge to core beliefs and the intrusive rumination have a moderator role on PTG, since group intervention is also linked to the enhancement of both variables. CONCLUSIONS: Participation in the intervention group increase PTG. Challenge to core beliefs and intrusive rumination are improved by group intervention, which to a certain extent facilitate PTG.


Assuntos
Neoplasias da Mama/psicologia , Crescimento Psicológico Pós-Traumático , Psicoterapia de Grupo/métodos , Adaptação Psicológica , Adulto , Estudos de Casos e Controles , Feminino , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Saúde da Mulher
17.
BMC Womens Health ; 16: 22, 2016 05 04.
Artigo em Inglês | MEDLINE | ID: mdl-27142443

RESUMO

BACKGROUND: Breast cancer can be perceived as a traumatic event with disturbing effects on psychological domains such as depression, anxiety, and Posttraumatic Stress Disorder. In contrast, growing evidence has shown that posttraumatic growth can occur as a result of coping with breast cancer. Challenging the assumptive world, deliberate rumination, and emotional disclosure are recognized as strong predictors of posttraumatic growth. Group interventions may also increase social support, distress disclosure, and posttraumatic growth. The aim of this study is to evaluate how group-based interventions can facilitate posttraumatic growth and promote improved psychosocial adjustment to breast cancer. This article describes the study protocol and the applied research methods. METHODS: To measure the impact of a group-based intervention on posttraumatic growth, a multi-center randomized control trial was developed for Portuguese breast cancer patients. 205 women with nonmetastatic breast cancer (stages 1 to 3) were recruited for the study and were randomly assigned either to the experimental group, which participated in an 8-session group intervention, or to the control group. Psychosocial variables, which consisted of posttraumatic growth, illness perception, stressfulness of the event, Posttraumatic Stress Disorder, core beliefs, rumination, social support, and distress disclosure were measured at three time points. The designated points in time for the assessments were baseline, 6 months post-intervention, and follow-up (12 months after baseline). DISCUSSION: This study is the first trial to assess the efficacy of a group-based intervention designed to facilitate posttraumatic growth following a breast cancer diagnosis. If proven to be effective, group-based intervention could be recommended as a complementary program to be included in hospital health-care and clinical practice. TRIAL REGISTRATION: The trial was registered on 28/10/2013 at the Current Controlled Trials ( ISRCTN02221709 ).


Assuntos
Neoplasias da Mama/psicologia , Terapia Cognitivo-Comportamental/métodos , Psicometria/instrumentação , Psicoterapia de Grupo/métodos , Adulto , Ansiedade/psicologia , Ansiedade/terapia , Neoplasias da Mama/terapia , Terapia Cognitivo-Comportamental/normas , Depressão/psicologia , Depressão/terapia , Feminino , Humanos , Satisfação do Paciente , Portugal , Psicometria/métodos , Psicoterapia de Grupo/normas , Projetos de Pesquisa , Apoio Social , Transtornos de Estresse Pós-Traumáticos/psicologia , Transtornos de Estresse Pós-Traumáticos/terapia , Sobreviventes/psicologia
18.
J Relig Health ; 53(4): 1013-24, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-23471772

RESUMO

The aim of this study was to explore whether spirituality was associated with menopausal symptoms. Menopausal symptoms, spirituality, health and menopausal status, and socio-demographic variables were assessed in a community sample of 710 peri- and postmenopausal women. A structural model was explored using structural equation modeling. The results evidence spirituality as a significant contributor regarding the severity of most menopausal symptoms. Among others, spirituality had a significant weight in depressive mood (ß = -.414; p < .001), anxiety (ß = -.308; p < .001), cognitive impairment (ß = -.287; p < .001), aches/pain (ß = -.148; p < .001), vasomotor (ß = -.125; p = .005) and sexual symptoms (ß = -.211; p < .001). Some socio-demographic variables, as well as perceived health, also predicted the menopausal symptoms' severity. Therefore, spirituality can have a positive impact on the menopausal symptoms' reporting.


Assuntos
Menopausa/psicologia , Espiritualidade , Atitude Frente a Saúde , Estudos Transversais , Feminino , Nível de Saúde , Humanos , Pessoa de Meia-Idade , Índice de Gravidade de Doença , Fatores Socioeconômicos , Inquéritos e Questionários
19.
Healthcare (Basel) ; 12(9)2024 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-38727457

RESUMO

Background: Research on post-traumatic growth (PTG) and HIV is scarce and the relationship between PTG and stigma is controversial. Group psychotherapeutic interventions to facilitate PTG in clinical samples are effective but none exist to simultaneously decrease stigma in the HIV population. The main objective was to evaluate the effectiveness of an intervention in increasing PTG and decreasing stigma in HIV, as well as to explore relationships between the variables. Methods: Quasi-experimental design with a sample of 42 HIV-positive adults (M = 46.26, SD = 11.90). The experimental group (EG) was subjected to a 9-week group intervention. Instruments: CBI, PTGI-X, PSS-10, HIV stigma, emotional expression, HIV stress indicators, HIV literacy, and skills. Multiple linear regression analysis was performed to assess the relationship between the variables. Results: There was an increase in PTG and a significant decrease in stigma in all domains and subscales in the EG. Compared to the control group, stigma (t(42) = -3.040, p = 0.004) and negative self-image (W = -2.937, p = 0.003) were significant, showing the efficacy of the intervention. Discussion: The intervention demonstrated success in facilitating PTG, attesting that in order to increase PTG, personal strength, and spiritual change, it is necessary to reduce stigma and negative self-image. The research provides more information on group interventions for PTG in HIV, relationships between variables, and population-specific knowledge for professionals.

20.
J Clin Med ; 13(2)2024 Jan 14.
Artigo em Inglês | MEDLINE | ID: mdl-38256598

RESUMO

Growing evidence suggests the involvement of adipose tissue in modulating the clinical course of relapsing-remitting multiple sclerosis (RRMS). This study aimed to investigate whether the intake of combined oral contraceptives (COCs) affects body weight and leptin and adiponectin (APN) blood levels in these patients. Clinical data from 62 women (M = 33.23 year) were recorded prior to the initiation of disease-modifying therapy. Patients who were taking COCs at the time of experiencing the first symptoms of disease (COC user) were compared with those who never used these formulations or stopped taking them before disease onset (COC non-user). Bivariate Pearson's correlations and hierarchical multiple linear regressions analysis were conducted. Normalized APN levels were lower in the COC-using patients (p = 0.013). Negative correlations between waist circumference and normalized APN (p = 0.001) were observed only in the COC non-user patients. A longer duration of COC intake was associated with increased body mass index and waist circumference (p = 0.003). Normalized APN predicted the MS Severity Score (MSSS) (p = 0.020), but this correlation was lost in the COC user patients. After adjusting for confounders, only age (p = 0.027) and, later, disease onset (p = 0.014) were correlated with the MSSS. Larger and prospective studies are needed to investigate the interactions of sex steroids with adipose metabolism in modulating disease progression.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA