Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 617
Filtrar
1.
Int J Biol Macromol ; 275(Pt 2): 133581, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38960262

RESUMO

Secretory immunoglobulin A [sIgA] is a promising candidate for enteric therapeutics applications, and several sIgA-based constructs are currently being developed by groups utilizing clarified Chinese hamster ovary [CHO] cell culture supernatants. To the monoclonal antibody downstream processing typically entails chromatography-based purification processes beginning with Protein A chromatography. In this paper, aqueous two-phase systems [ATPS] were employed for the preliminary purification of secretory immunoglobulin A [sIgA] monoclonal antibody [mAb] from clarified CHO-cell culture supernatants. A 24 full factorial design was utilized. The influence of various process parameters such as pH, PEG molecular weight [MPEG], PEG concentration [CPEG], and phosphate salt concentration [CPHO], on the sIgA partition coefficient [K sIgA] and the recovery index [Y] in the PEG phase were evaluated. The Elisa assay revealed that, in the ATPS conditions tested, sIgA mAb was mostly detected in PEG upper phase. Run 14 with the highest sIgA activity exhibited the following conditions: MPEG 8.000 g/mol, CPEG 12,5 %, pH 7,0 and CPHO 10 %, and a sIgA K of 94.50 and a recovery index [Y] of 33.52 %. The proposed platform provides straightforward implementation, yields comparable results, and offers significantly improved economics for manufacturing sIgA mAb biotherapeutics.

2.
J Sci Food Agric ; 2024 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-38940514

RESUMO

BACKGROUND: Glasswort represents a novel alternative to KCl for replacing sodium in meat products. To evaluate the effects of Na reduction on the quality changes of a traditional dry cured belly due to storage, fresh bellies were dry-salted with 2% NaCl (BCON), with 2% of a mixture containing 50% NaCl and 50% KCl (BKCl) or with 1% of a mixture of 90% NaCl and 10% powdered glasswort (BGW), dry-cured, sliced, vacuum packaged and stored under refrigeration for 60 days. RESULTS: The BKCl and BGW bellies were lower in sodium by one-third to one-half compared to BCON (with 1.6 g Na/100 g). Neither BKCl, nor BGW significantly differed from BCON in free fatty acids (FFA) before and after storage, whereas BGW showed almost twice as much 2-methylbutanal content as BCON. All bellies showed microbiological stability during storage. Micrococcaceae was the most abundant microbial group with values of 105 to 106 colony-forming units g-1. The BGW presented higher Micrococcaceae counts (approximately one log unit) but lower microbial biodiversity than BCON. CONCLUSION: The two alternative dry salting methods reduced the sodium content in bellies, at the same time as ensuring chemical and microbiological stability during refrigerated vacuum storage. © 2024 The Author(s). Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

3.
Animals (Basel) ; 14(11)2024 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-38891744

RESUMO

The purpose of this study was to assess the following effects: (1) the inclusion of olive in the animal's diet on the dry-cured shoulder; (2) the effect of curing on three different muscles (infraspinatus, supraspinatus, and subscapular); (3) the effect of different curing times (fresh shoulder, 6 months curing, and 12 months curing). For this purpose, forty shoulders were used, followed by a cold nitrite-free curing process with controlled humidity and temperature, according to the flowchart of a company that implements highly stringent standards in terms of food safety and quality. Samples were evaluated for their physicochemical composition and lipid profile. All the physicochemical composition parameters were significantly different (p < 0.001) in the three muscles studied. As might be expected, the curing times from the fresh product to the final product were also significantly different for all the parameters studied in this work. Regarding the inclusion of olive cake, it was found that treatment with a base diet + 10% exhausted olive cake (T4) showed higher levels for the parameters NaCl, collagen, and total fat. As for the fatty acid profile, in general, the olive did not influence the final product. On the other hand, we found that the type of muscle and the curing time of the cured shoulder had a significant influence on the fatty acid profile. We should also point out that there are significant differences in the interaction between curing time and muscle, particularly in saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), and polyunsaturated fatty acids (PUFAs), as well as the lipid quality indices. Canonical discriminant analysis is viable for evaluating the evolution of the curing process, discriminating and classifying curing times, and evaluating the muscles of the Bísaro pork shoulder. Also, the introduction of olive cake into the animal diet does not affect the final product obtained.

4.
Cancer Nurs ; 2024 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-38857172

RESUMO

BACKGROUND: With the increasing survival rates of childhood cancer, nurses' familiarity with published evidence has become crucial to care for this population and their families throughout the survival process. OBJECTIVE: To systematically identify and conduct a bibliometric analysis of nursing-related evidence concerning extended and long-term survival of childhood survivors. METHODS: A scoping review was conducted using bibliometric analysis with searches performed in the PubMed, CINAHL, SCOPUS, and Web of Science databases. A total of 300 studies on childhood cancer survival within the nursing field were included. RESULTS: The first study on this topic was published in 1975. American and Chinese researchers lead study publications, primarily publishing in nursing journals such as Cancer Nursing. Quantitative designs were prevalent, and the majority of the studies focused on physical late effects, overall quality of life, and survivor follow-up care. CONCLUSIONS: This study has allowed us to map and synthesize the bibliometric evidence pertaining to the extended and long-term survivorship of childhood cancer survivors in the nursing field. Consequently, it identifies gaps in knowledge, research trends, and areas necessitating further exploration. IMPLICATIONS FOR PRACTICE: The evidence presented in this review can facilitate academic and clinical discussions, offering a comprehensive synthesis of the published knowledge. More research needs to be developed on the topic, particularly in Central and Latin America, Africa, Southern and Eastern Europe, and in some regions of Asia. Furthermore, the scope of studies should extend beyond late effects and quality of life, encompassing the experience of surviving childhood cancer, including psychosocial and spiritual dimensions.

5.
Codas ; 36(4): e20230148, 2024.
Artigo em Português, Inglês | MEDLINE | ID: mdl-38775526

RESUMO

PURPOSE: To evaluate the immediate effect of the inspiratory exercise with a booster and a respiratory exerciser on the voice of women without vocal complaints. METHODS: 25 women with no vocal complaints, between 18 and 34 years old, with a score of 1 on the Vocal Disorder Screening Index (ITDV) participated. Data collection was performed before and after performing the inspiratory exercise and consisted of recording the sustained vowel /a/, connected speech and maximum phonatory times (MPT) of vowels, fricative phonemes and counting numbers. In the auditory-perceptual judgment, the Vocal Deviation Scale (VSD) was used to verify the general degree of vocal deviation. Acoustic evaluation was performed using the PRAAT software and the parameters fundamental frequency (f0), jitter, shimmer, harmonium-to-noise ratio (HNR), Cepstral Peak Prominence Smoothed (CPPS), Acoustic Voice Quality Index (AVQI) and Acoustic Breathiness Index (ABI). To measure the aerodynamic measurements, the time of each emission was extracted in the Audacity program. Data were statistically analyzed using the Statistica for Windows software and normality was tested using the Shapiro-Wilk test. To compare the results, Student's and Wilcoxon's t tests were applied, adopting a significance level of 5%. RESULTS: There were no significant differences between the results of the JPA and the acoustic measures, in the pre and post inspiratory exercise moments. As for the aerodynamic measures, it was possible to observe a significant increase in the value of the TMF /s/ (p=0.008). CONCLUSION: There was no change in vocal quality after the inspiratory exercise with stimulator and respiratory exerciser, but an increase in the MPT of the phoneme /s/ was observed after the exercise.


OBJETIVO: Avaliar o efeito imediato do exercício inspiratório com incentivador e exercitador respiratório na voz de mulheres sem queixas vocais. MÉTODO: Participaram 25 mulheres sem queixas vocais, entre 18 e 34 anos, com pontuação 1 no Índice de Triagem para Distúrbio Vocal (ITDV). A coleta de dados foi realizada nos momentos antes e após realização de exercício inspiratório e consistiu na gravação de vogal sustentada /a/, fala encadeada e tempos máximos fonatórios (TMF) de vogais, fonemas fricativos e contagem de números. No julgamento perceptivo-auditivo foi utilizada a Escala de Desvio Vocal (EDV) para verificar o grau geral do desvio vocal. Avaliação acústica foi feita no software PRAAT e foram extraídos os parâmetros frequência fundamental (f0), jitter, shimmer, proporção harmônico -ruído (HNR), Cepstral Peak Prominence Smoothed (CPPS), Acoustic Voice Quality Index (AVQI) e Acoustic Breathiness Index (ABI). Para mensuração das medidas aerodinâmicas, o tempo de emissão foi extraído no programa Audacity. Para comparar os resultados utilizou-se o teste paramétrico t de Student para amostras dependentes na análise das variáveis com distribuição normal e o teste de Wilcoxon para variáveis com distribuição não normal. RESULTADOS: Não houve diferenças entre os resultados do JPA e das medidas acústicas, nos momentos pré e pós exercício inspiratório. Quanto às medidas aerodinâmicas foi possível observar aumento significativo no valor do TMF /s/ (p=0,008). CONCLUSÃO: Não houve modificação na qualidade vocal após o exercício inspiratório com incentivador e exercitador respiratório, porém foi observado aumento do TMF do fonema /s/ após a realização do exercício.


Assuntos
Exercícios Respiratórios , Qualidade da Voz , Humanos , Feminino , Adulto , Adulto Jovem , Adolescente , Exercícios Respiratórios/métodos , Acústica da Fala , Distúrbios da Voz/fisiopatologia , Distúrbios da Voz/diagnóstico , Fonação/fisiologia
6.
Epilepsy Behav ; 156: 109832, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38761450

RESUMO

Crack cocaine is a highly addictive and potent stimulant drug. Animal studies have shown that the cholinergic system plays a role in neurotoxicity induced by cocaine or its active metabolites inhalation. Behavioral alterations associated with crack cocaine use include hyperactivity, depressed mood, and decreased seizure threshold. Here we evaluate the acetylcholinesterase (AChE) and reactive oxygen species (ROS) activity, behavioral profile, and the threshold for epileptic seizures in rats that received intrahippocampal pilocarpine (H-PILO) followed by exposure to crack cocaine (H-PILO + CRACK). Animals exposed to H-PILO + CRACK demonstrated increased severity and frequency of limbic seizures. The AChE activity was reduced in the groups exposed to crack cocaine alone (CRACK) and H-PILO + CRACK, whereas levels of ROS remained unchanged. In addition, crack cocaine exposure increased vertical locomotor activity, without changing water and sucrose intake. Short-term memory consolidation remained unchanged after H-PILO, H-PILO + CRACK, and CRACK administration. Overall, our data suggest that crack cocaine inhalation reduced the threshold for epileptic seizures in rats submitted to low doses of pilocarpine through the inhibition of AChE. Taken together, our findings can be useful in the development of effective strategies for preventing and treating the harmful effects of cocaine and crack cocaine on the central nervous system.


Assuntos
Acetilcolinesterase , Cocaína Crack , Pilocarpina , Ratos Wistar , Convulsões , Animais , Masculino , Acetilcolinesterase/metabolismo , Ratos , Pilocarpina/toxicidade , Convulsões/induzido quimicamente , Administração por Inalação , Modelos Animais de Doenças , Espécies Reativas de Oxigênio/metabolismo , Atividade Motora/efeitos dos fármacos , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo
7.
Codas ; 36(4): e20230047, 2024.
Artigo em Português, Inglês | MEDLINE | ID: mdl-38808777

RESUMO

PURPOSE: To compare the acoustic measurements of Cepstral Peak Prominence Smoothed (CPPS) and Acoustic Voice Quality Index (AVQI) of children with normal and altered voices, to relationship with auditory-perceptual judgment (APJ) and to establish cut-off points. METHODS: Vocal recordings of the sustained vowel and number counting tasks of 185 children were selected from a database and submitted to acoustic analysis with extraction of CPPS and AVQI measurements, and to APJ. The APJ was performed individually for each task, classified as normal or altered, and for the tasks together defining whether the child would pass or fail in a situation of vocal screening. RESULTS: Children with altered APJ and who failed the screening had lower CPPS values and higher AVQI values, than those with normal APJ and who passed the screening. The APJ of the sustained vowel task was related to CPPS and AVQI, and APJ of the number counting task was related only to AVQI and CPPS numbers. The cut-off points that differentiate children with and without vocal deviation are 14.07 for the vowel CPPS, 7.62 for the CPPS numbers and 2.01 for the AVQI. CONCLUSION: Children with altered voices, have higher AVQI values and lower CPPS values, when detected in children with voices within the normal range. The acoustic measurements were related to the auditory perceptual judgment of vocal quality in the sustained vowel task, however, the number counting task was related only to the AVQI and CPPS. The cut-off points that differentiate children with and without vocal deviation are 14.07 for the CPPS vowel, 7.62 for the CPPS numbers and 2.01 for the AVQI. The three measures were similar in identifying voices without deviation and dysphonic voices.


OBJETIVO: Comparar as medidas acústicas de Cepstral Peak Prominence Smoothed (CPPS) e Acoustic Voice Quality Index (AVQI) de crianças com vozes normais e alteradas, relacionar com o julgamento perceptivo-auditivo (JPA) da voz e estabelecer pontos de corte. MÉTODO: Gravações vocais das tarefas de vogal sustentada e contagem de números de 185 crianças foram selecionadas em um banco de dados e submetidas a análise acústica com extração das medidas de CPPS e AVQI, e ao JPA. O JPA foi realizado individualmente para cada tarefa e as amostras foram classificadas posteriormente como normal ou alterada, e para as tarefas em conjunto definindo-se se a criança passaria ou falharia em uma situação de triagem vocal. RESULTADOS: Crianças com JPA alterado e que falharam na triagem apresentaram valores menores de CPPS e maiores de AVQI, do que as com JPA normal e que passaram na triagem. O JPA da tarefa de vogal sustentada se relacionou ao CPPS e AVQI, e da tarefa de contagem de números relacionou-se apenas ao AVQI e CPPS números. Os pontos de corte que diferenciam crianças com e sem desvio vocal são 14,07 para o CPPS vogal, 7,62 para o CPPS números e 2,01 para o AVQI. CONCLUSÃO: Crianças com JPA alterado apresentaram maiores valores de AVQI e menores valores de CPPs. O JPA da tarefa de vogal previu todas as medidas acústicas, porém, de contagem previu apenas as medidas extraídas dela. As três medidas foram semelhantes na identificação de vozes sem desvio e vozes disfônicas.


Assuntos
Acústica da Fala , Qualidade da Voz , Humanos , Qualidade da Voz/fisiologia , Criança , Feminino , Masculino , Percepção Auditiva/fisiologia , Distúrbios da Voz/diagnóstico , Distúrbios da Voz/fisiopatologia , Adolescente , Estudos de Casos e Controles , Medida da Produção da Fala , Julgamento
8.
Mitochondrion ; 77: 101901, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38777222

RESUMO

Zebrafish are a powerful tool to study a myriad of experimental conditions, including mitochondrial bioenergetics. Considering that mitochondria are different in many aspects depending on the tissue evaluated, in the zebrafish model there is still a lack of this investigation. Especially for juvenile zebrafish. In the present study, we examined whether different tissues from zebrafish juveniles show mitochondrial density- and tissue-specificity comparing brain, liver, heart, and skeletal muscle (SM). The liver and brain complex IV showed the highest O2 consumption of all ETC in all tissues (10x when compared to other respiratory complexes). The liver showed a higher potential for ROS generation. In this way, the brain and liver showed more susceptibility to O2- generation when compared to other tissues. Regarding Ca2+ transport, the brain showed greater capacity for Ca2+ uptake and the liver presented low Ca2+ uptake capacity. The liver and brain were more susceptible to producing NO. The enzymes SOD and Catalase showed high activity in the brain, whereas GPx showed higher activity in the liver and CS in the SM. TEM reveals, as expected, a physiological diverse mitochondrial morphology. The essential differences between zebrafish tissues investigated probably reflect how the mitochondria play a diverse role in systemic homeostasis. This feature may not be limited to normal metabolic functions but also to stress conditions. In summary, mitochondrial bioenergetics in zebrafish juvenile permeabilized tissues showed a tissue-specificity and a useful tool to investigate conditions of redox system imbalance, mainly in the liver and brain.


Assuntos
Metabolismo Energético , Mitocôndrias , Peixe-Zebra , Animais , Peixe-Zebra/metabolismo , Mitocôndrias/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Cálcio/metabolismo , Encéfalo/metabolismo , Especificidade de Órgãos , Fígado/metabolismo , Consumo de Oxigênio , Músculo Esquelético/metabolismo
9.
Semin Oncol Nurs ; : 151655, 2024 May 23.
Artigo em Inglês | MEDLINE | ID: mdl-38782693

RESUMO

OBJECTIVES: This study aimed to discuss how compassion fatigue (CF) develops and its repercussions on the personal and professional lives of oncology nurses. METHODS: A discursive article, with systematic searches were performed in seven databases to find publications on CF in oncology nurses. RESULTS: So as to better organize the findings, three categories were developed to present and discuss issues related to CF: (1) Characteristics of CF and its developments: describes the components related to CF and the manifestation of this phenomenon; (2) Repercussions of compassion fatigue: reports on the impact of CF on the personal and professional life of oncology nurses; and (3) Resources for dealing with compassion fatigue: lists interventions, sources of support, professional personal training, qualified nursing care in the face of adversity, and gratitude and recognition. CONCLUSION: the factors that trigger or protect CF are multifactorial, with the need for collective and individual interventions as a way of helping oncology nurses to protect themselves, to avoid or manage this phenomenon. CF has a direct clinical impact on the life of the oncology nurse, causing several changes. It also indirectly impacts the patient's life clinically, as it is a phenomenon that has repercussions on the provision of care. IMPLICATIONS FOR NURSING PRACTICE: CF affects the personal and professional lives of oncology nurses, so nurses need to seek resources to deal with it. Nursing staff employers and managers can use the evidence from this research to help nurses manage and protect themselves from compassion fatigue.

10.
Foods ; 13(10)2024 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-38790881

RESUMO

The aims of this study were to describe and compare the meat quality characteristics of male and female kids from the "Serrana" and "Preta de Montesinho" breeds certified as "Cabrito Transmontano" and reinforce the performance of near-infrared reflectance (NIR) spectra in predicting these quality characteristics and discriminating among breeds. Samples of Longissimus thoracis (n = 32; sixteen per breed; eight males and eight females) were used. Breed significantly affected meat quality characteristics, with only color and fatty acid (FA) (C12:0) being influenced by sex. The meat of the "Serrana" breed proved to be more tender than that of the "Preta de Montesinho". However, the meat from the "Preta de Montesinho" breed showed higher intramuscular fat content and was lighter than that from the "Serrana" breed, which favors its quality of color and juiciness. The use of NIR with the linear support vector machine regression (SVMR) classification model demonstrated its capability to quantify meat quality characteristics such as pH, CIELab color, protein, moisture, ash, fat, texture, water-holding capacity, and lipid profile. Discriminant analysis was performed by dividing the sample spectra into calibration sets (75 percent) and prediction sets (25 percent) and applying the Kennard-Stone algorithm to the spectra. This resulted in 100% correct classifications with the training data and 96.7% accuracy with the test data. The test data showed acceptable estimation models with R2 > 0.99.

11.
Microsc Res Tech ; 87(8): 1889-1903, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38556928

RESUMO

This article describes detailed and novel data on the anatomy and histochemistry of leaves, stems, and roots of Camonea umbellata (L.) A.R.Simões & Staples in different environments for the identification of characters with taxonomical value and of ecological importance, with provision of light and scanning electron microscopy images. To analyze the characters, we collected samples of the vegetative organs of three individuals in each of three populations, which were in a grazing area, an urban environment, and a biological reserve. The main diagnostic anatomical markers for the identification of C. umbellata include amphistomatic leaves, tetracytic and brachyparatetracytic stomata, peltate trichomes, long simple trichomes, epidermis with striated cuticle ornamentation, mesophyll with acute borders, presence of druses, secretory channels, angular collenchyma, fibrous pericycle in the stem, intraxylary phloem in the vegetative organs, oil bodies throughout the midrib, petiole, stem and root, and epicuticular waxes of the crust and coiled rodlet types. Since the characters above did not show variation in the environments evaluated, we consider these characters taxonomically useful for the identification of C. umbellata. RESEARCH HIGHLIGHTS: The anatomy of the aerial vegetative organs of Camonnea umbellata retains common Convolvulaceae characters. The sinuosity of the epidermal cell walls and the density of trichomes in the epidermis of the petiole were visually variable characters among the analyzed individuals. Amphistomatic leaves, tetracytic and brachyparatetracytic stomata, peltate trichomes, epidermis with striated cuticle ornamentation, dorsiventral mesophyll with border acute, presence of druses, secretory structures, angular collenchyma, fibrous pericycle in the stem, intraxillary phloem, presence of oil bodies in all organs, and epicuticular waxes of the crust type and coiled rods were considered important anatomical markers for the recognition and correct identification of Camonea umbellata.


Assuntos
Microscopia Eletrônica de Varredura , Microscopia , Folhas de Planta , Raízes de Plantas , Caules de Planta , Tricomas , Folhas de Planta/anatomia & histologia , Folhas de Planta/ultraestrutura , Caules de Planta/anatomia & histologia , Caules de Planta/ultraestrutura , Tricomas/ultraestrutura , Tricomas/anatomia & histologia , Raízes de Plantas/anatomia & histologia , Raízes de Plantas/ultraestrutura , Estômatos de Plantas/ultraestrutura , Estômatos de Plantas/anatomia & histologia , Epiderme Vegetal/ultraestrutura , Epiderme Vegetal/anatomia & histologia
12.
Acta Psychol (Amst) ; 246: 104236, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38613854

RESUMO

Languages can express grammatical gender through different ortho-phonological regularities present in nouns (e.g., the cues "-o" and "-a" for the masculine and the feminine respectively in Italian, Portuguese, or Spanish). The term "gender transparency" was coined to describe these regularities (Bates et al., 1995). In gendered languages, we can hence distinguish between transparent nouns, i.e., those displaying form regularities; opaque nouns, i.e., those with ambiguous endings; and irregular nouns, i.e., those that display the typical form regularities but are associated with the opposite gender. Following a descriptive analysis of such regularities, languages have been recently classified according to their degree of gender transparency, which seems relevant in regard to gender acquisition and processing. Yet, there are certain inconsistencies in determining which languages are overall transparent and which are opaque. In particular, it is not clear whether some other complex regularities such as derivational suffixes are also "transparent" cues for gender, what really constitutes an "opaque" noun, or which role orthography and morphology have in transparency. Given the existing inconsistencies in classifying languages as transparent or opaque, this work introduces a proposal to assess gender transparency systematically. Our methodology adapts the standardized factors proposed by Audring (2019) to analyse the relative complexity of gender systems. Such factors are adapted to gender transparency on the basis of the literature on gender acquisition and processing. To support the feasibility of such a proposal, the concepts have been instantiated in a quantitative model to obtain for the first time an objective measure of gender transparency using European Portuguese and Dutch as instances of target languages. Our results coincide with the theoretically expected outcome: European Portuguese obtains a high value of gender transparency while Dutch obtains a moderately low one. Future adaptations of this model to the gender systems of other languages could allow the continuum of gender transparency to sustain robust predictions in studies on gender processing and acquisition.


Assuntos
Idioma , Humanos , Psicolinguística/normas , Feminino , Masculino , Identidade de Gênero , Sinais (Psicologia)
13.
Exp Parasitol ; 261: 108749, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38593864

RESUMO

Trypanosoma cruzi (T. cruzi) causes Chagas, which is a neglected tropical disease (NTD). WHO estimates that 6 to 7 million people are infected worldwide. Current treatment is done with benznidazole (BZN), which is very toxic and effective only in the acute phase of the disease. In this work, we designed, synthesized, and characterized thirteen new phenoxyhydrazine-thiazole compounds and applied molecular docking and in vitro methods to investigate cell cytotoxicity, trypanocide activity, nitric oxide (NO) production, cell death, and immunomodulation. We observed a higher predicted affinity of the compounds for the squalene synthase and 14-alpha demethylase enzymes of T. cruzi. Moreover, the compounds displayed a higher predicted affinity for human TLR2 and TLR4, were mildly toxic in vitro for most mammalian cell types tested, and LIZ531 (IC50 2.8 µM) was highly toxic for epimastigotes, LIZ311 (IC50 8.6 µM) for trypomastigotes, and LIZ331 (IC50 1.9 µM) for amastigotes. We observed that LIZ311 (IC50 2.5 µM), LIZ431 (IC50 4.1 µM) and LIZ531 (IC50 5 µM) induced 200 µg/mL of NO and JM14 induced NO production in three different concentrations tested. The compound LIZ331 induced the production of TNF and IL-6. LIZ311 induced the secretion of TNF, IFNγ, IL-2, IL-4, IL-10, and IL-17, cell death by apoptosis, decreased acidic compartment formation, and induced changes in the mitochondrial membrane potential. Taken together, LIZ311 is a promising anti-T. cruzi compound is not toxic to mammalian cells and has increased antiparasitic activity and immunomodulatory properties.


Assuntos
Doença de Chagas , Simulação de Acoplamento Molecular , Óxido Nítrico , Tiazóis , Tripanossomicidas , Trypanosoma cruzi , Trypanosoma cruzi/efeitos dos fármacos , Tiazóis/farmacologia , Tiazóis/química , Doença de Chagas/tratamento farmacológico , Doença de Chagas/imunologia , Humanos , Animais , Camundongos , Óxido Nítrico/metabolismo , Óxido Nítrico/biossíntese , Tripanossomicidas/farmacologia , Tripanossomicidas/química , Concentração Inibidora 50 , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Hidrazinas/farmacologia , Hidrazinas/química , Citocinas/metabolismo , Camundongos Endogâmicos BALB C
14.
JCO Glob Oncol ; 10: e2300343, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38603656

RESUMO

Head and neck squamous cell carcinoma (HNSCC) is well known as a serious health problem worldwide, especially in low-income countries or those with limited resources, such as most countries in Latin America. International guidelines cannot always be applied to a population from a large region with specific conditions. This study established a Latin American guideline for care of patients with head and neck cancer and presented evidence of HNSCC management considering availability and oncologic benefit. A panel composed of 41 head and neck cancer experts systematically worked according to a modified Delphi process on (1) document compilation of evidence-based answers to different questions contextualized by resource availability and oncologic benefit regarding Latin America (region of limited resources and/or without access to all necessary health care system infrastructure), (2) revision of the answers and the classification of levels of evidence and degrees of recommendations of all recommendations, (3) validation of the consensus through two rounds of online surveys, and (4) manuscript composition. The consensus consists of 12 sections: Head and neck cancer staging, Histopathologic evaluation of head and neck cancer, Head and neck surgery-oral cavity, Clinical oncology-oral cavity, Head and neck surgery-oropharynx, Clinical oncology-oropharynx, Head and neck surgery-larynx, Head and neck surgery-larynx/hypopharynx, Clinical oncology-larynx/hypopharynx, Clinical oncology-recurrent and metastatic head and neck cancer, Head and neck surgery-reconstruction and rehabilitation, and Radiation therapy. The present consensus established 48 recommendations on HNSCC patient care considering the availability of resources and focusing on oncologic benefit. These recommendations could also be used to formulate strategies in other regions like Latin America countries.


Assuntos
Carcinoma de Células Escamosas , Neoplasias de Cabeça e Pescoço , Humanos , Carcinoma de Células Escamosas de Cabeça e Pescoço/terapia , América Latina/epidemiologia , Consenso , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/patologia , Neoplasias de Cabeça e Pescoço/terapia
15.
J Pediatr (Rio J) ; 2024 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-38677324

RESUMO

OBJECTIVE: This study aimed to review literature from the past five years, focusing on the use of educational videos as a guidance tool for parents and guardians of children with lip and palate clefts. SOURCE OF DATA: Conducted between April and July 2022, this integrative literature review was framed around the question: 'What is the evidence regarding the use of videos in health education for parents/guardians of children with cleft lip and palate? PICO strategy was used to develop the research. A literature search was undertaken across PubMed, Web of Science, Scopus, and the Virtual Health Library databases. Of the eight articles included in this review, four were sourced from the PubMed database, with three published in 2021. SUMMARY OF THE FINDINGS: The findings indicated that YouTube videos were moderately satisfactory and met the needs of parents or legal guardians to a partial extent. The majority of the videos analyzed in this review were characterized by a moderate level of informational content. One study particularly underscored that the content of these videos only partially satisfies the requirements of the parents or legal guardians of the children. CONCLUSIONS: Nevertheless, such videos are considered viable alternatives for health education, offering numerous benefits yet facing challenges, primarily due to the scarcity of information on orofacial malformations.

16.
J Pediatr Nurs ; 77: 13-20, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38471371

RESUMO

PURPOSE: The mechanism of the impact of religion on health is still unclear, especially in children and adolescents with chronic illness who live in religious contexts. This study aimed to understand the influence of religion on coping with chronic diseases from the perspective of hospitalized children and adolescents diagnosed with cancer, type 1 diabetes mellitus and cystic fibrosis. DESIGN AND METHODS: Qualitative descriptive research used photo-elicitation interviews with 35 Brazilian children and adolescents with cancer, type 1 diabetes mellitus and cystic fibrosis, aged between 7 and 17 years old. A thematic analysis approach was used to analyze qualitative data. RESULTS: Participants were diagnosed with cystic fibrosis (14.3%), cancer (57.1%), and type 1 diabetes mellitus (28.6%) and 82.9% had a religious affiliation. Three themes were constructed: finding strength and support in the relationship with the divine, religion as an important source of meaning, and religious practice as a promoter of well-being. These themes demonstrate that children and adolescents themselves perceived their illness as a journey through which their faith grew. CONCLUSIONS: This research shows the influence of religion on the positive coping of chronic illness, being a source of strength and support from the relationship with the divine, as well as offering a source of meaning, purpose and well-being based on religious practices. PRACTICE IMPLICATIONS: This study supports clinical practice, based on the recognition of the patient as a religious and spiritualized person who has spiritual beliefs and needs that are capable of influencing treatment.


Assuntos
Adaptação Psicológica , Criança Hospitalizada , Fibrose Cística , Pesquisa Qualitativa , Humanos , Criança , Masculino , Feminino , Adolescente , Doença Crônica/psicologia , Criança Hospitalizada/psicologia , Fibrose Cística/psicologia , Brasil , Esperança , Diabetes Mellitus Tipo 1/psicologia , Neoplasias/psicologia , Religião e Psicologia , Adolescente Hospitalizado/psicologia
17.
Chem Biol Interact ; 394: 110954, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38518852

RESUMO

The literature reports that thiazole and isatin nuclei present a range of biological activities, with an emphasis on anticancer activity. Therefore, our proposal was to make a series of compounds using the molecular hybridization strategy, which has been used by our research group, producing hybrid molecules containing the thiazole and isatin nuclei. After structural planning and synthesis, the compounds were characterized and evaluated in vitro against breast cancer cell lines (T-47D, MCF-7 and MDA-MB-231) and against normal cells (PBMC). The activity profile on membrane proteins involved in chemoresistance and tumorigenic signaling proteins was also evaluated. Among the compounds tested, the compounds 4c and 4a stood out with IC50 values of 1.23 and 1.39 µM, respectively, against the MDA-MB-231 cell line. Both compounds exhibited IC50 values of 0.45 µM for the MCF-7 cell line. Compounds 4a and 4c significantly decreased P-gp mRNA expression levels in MCF-7, 4 and 2 folds respectively. Regarding the impact on tumorigenic signaling proteins, compound 4a inhibited Akt2 in MDA-MB-231 and compound 4c inhibited the mRNA expression of VIM in MCF-7.


Assuntos
Antineoplásicos , Neoplasias da Mama , Isatina , Proteínas Proto-Oncogênicas c-akt , RNA Mensageiro , Tiazóis , Humanos , Proteínas Proto-Oncogênicas c-akt/metabolismo , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Neoplasias da Mama/tratamento farmacológico , Isatina/farmacologia , Isatina/química , Isatina/síntese química , Linhagem Celular Tumoral , RNA Mensageiro/metabolismo , RNA Mensageiro/genética , Tiazóis/farmacologia , Tiazóis/química , Feminino , Antineoplásicos/farmacologia , Antineoplásicos/síntese química , Antineoplásicos/química , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/metabolismo , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/genética , Simulação de Acoplamento Molecular , Células MCF-7 , Ensaios de Seleção de Medicamentos Antitumorais , Relação Estrutura-Atividade
18.
Eur J Med Chem ; 268: 116297, 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38458108

RESUMO

A series of novel 9-alkyl/aryl-2-aryl-6-carbamoylpurines were synthesized, and their activity against Mycobacterium tuberculosis strain H37Rv was assessed. The SAR analysis on the first set of derivatives, with an alkyl or aryl unit at N-9 and a phenolic unit at C-2, showed that the activity depends on the purine ring substituents at N-9 and C-2. A phenyl group at N-9 combined with a 3-hydroxyphenyl or 4-hydroxyphenyl at C-2 improve the activity. The most active compound of this set has a phenyl group at N-9 and a 4-hydroxyphenyl group at C-2, displaying an IC90 = 1.2 µg/mL and a selectivity index higher than 25.5. This compound served as a Hit to design the second set of derivatives. A phenyl group at N-9 was maintained, and the group at C-2 was diversified. The SAR analysis showed that the aryl unit at C-2 must have an oxygen or nitrogen atom bonded in the para position. A proton, a small alkyl or a substituted aryl group may also be bonded to the oxygen. The compound with the 4-methoxyphenyl group at C-2, 1Bd, exhibits the highest activity with an IC90 < 0.19 µg/mL. This compound is highly potent against M. tuberculosis strain H37Rv and non-toxic for VERO mammalian cells with an SI > 153.8. Compound 1Bd was also non-cytotoxic against primary macrophage cultures at IC90, 2xIC90, and 10xIC90 and significantly reduced the bacterial load in M. tuberculosis-infected macrophages at the same concentrations. Compound 1Bd showed a favorable pharmacokinetic profile when administered orally, with major lung and liver accumulation. In vivo antimycobacterial efficacy of 1Bd was tested at 25 mg/kg. At the tested regimen, a decrease in bacterial burden was observed in the liver. Optimization of the treatment regimen should be performed to fully potentiate the in vivo efficacy of our lead molecule, particularly in the lung, the main target organ of M. tuberculosis.


Assuntos
Mycobacterium tuberculosis , Tuberculose , Animais , Antituberculosos/farmacologia , Testes de Sensibilidade Microbiana , Tuberculose/tratamento farmacológico , Tuberculose/microbiologia , Oxigênio , Relação Estrutura-Atividade , Mamíferos
19.
Cancer Nurs ; 2024 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-38498794

RESUMO

BACKGROUND: The global population of long-term cancer survivors is increasing, thanks to advances in treatments and care. Healthcare systems are working to address the unique needs of these individuals. However, there remains a knowledge gap concerning nurses' view on cancer survivorship care. OBJECTIVE: To identify nurses' perspective of care for long-term cancer survivors and their families. METHODS: This qualitative descriptive study used 5 focus groups comprising 33 nurses from primary healthcare and specialized oncology care. Data analysis was conducted through thematic analysis, and the study received ethical approval. RESULTS: Long-term cancer survivors and their families often remained unrecognized as a distinct group within the healthcare system. Consequently, nurses provide what can be termed as "opportunistic care" during nurse-survivor encounters, addressing health needs beyond the purpose of the initial healthcare visit. This absence of a systematic or structured approach for this patient group has prompted nurses to seek the establishment of a comprehensive framework through survivorship care plans, thus ensuring a continuum of care for this specific population. CONCLUSION: The lack of a structured approach to caring for long-term cancer survivors and their families, often invisible as a distinct population group, results in nurses providing care on an opportunistic basis. IMPLICATIONS FOR PRACTICE: It is crucial to develop and implement survivorship care plans tailored to this population's needs. Simultaneously, it is important to advance research in this area and establish an educational framework for nurses, enabling them to effectively address the care of long-term cancer survivors and their families.

20.
Animals (Basel) ; 14(5)2024 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-38473124

RESUMO

Two of the main issues related to cured meat products are castration to avoid boar taint and the hefty reliance on soybean meal to feed pigs. However, data on the effects of immunocastration in pigs and alternative crop protein feeds on the sensory traits and consumers' acceptance of dry-cured loin are still limited. A preliminary study was conducted on the effect of sex type (surgical castrated male pigs and immunocastrated male and female pigs, at approximately 140 kg in weight and 7 months of age) and animal diet (pea vs. soya) on dry-cured loins. The study involved a sensory evaluation of six treatments, with a 3 × 2 factorial design, conducted by trained panellists and untrained consumers in Spain (n = 126) and Portugal (n = 80). The consumers were also checked for their skatole sensitivity using a pure substance. The results showed that the pea-based diet was significantly different (p < 0.001) from the soy-based diet, as determined by a trained panel of surgically castrated male pigs, although the immunocastration treatments were not split. Dry-cured loin from immunocastrated male pigs fed with peas was considered tenderer and juicier (p < 0.05) than those fed soya-based diets. The untrained consumer panel scored higher on the sensory traits (flavour, juiciness, and overall liking) from the loin samples of surgically castrated male pigs fed a pea diet. All consumers scored similarly in boar taint detection. This study demonstrates the applicability of the pea-based diet for the feeding of pigs destined for cured meat and highlights immunocastration as a tool that does not compromise the skatole detection score.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA