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1.
Clin Chim Acta ; 564: 119946, 2025 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-39214394

RESUMO

Ovarian cancer, a prevalent and deadly cancer among women, presents a significant challenge for early detection due to its heterogeneous nature. MicroRNAs, short non-coding regulatory RNA fragments, play a role in various cellular processes. Aberrant expression of these microRNAs has been observed in the carcinogenesis-related processes of many cancer types. Numerous studies highlight the critical role of microRNAs in the initiation and progression of ovarian cancer. Given their clinical importance and predictive value, there has been considerable interest in developing simple, prompt, and sensitive miRNA biosensor strategies. Among these, electrochemical sensors have demonstrated advantageous characteristics such as simplicity, sensitivity, low cost, and scalability. These microRNA-based electrochemical biosensors are valuable tools for early detection and point-of-care applications. This article discusses the potential role of microRNAs in ovarian cancer and recent advances in the development of electrochemical biosensors for miRNA detection in ovarian cancer samples.


Assuntos
Técnicas Biossensoriais , Técnicas Eletroquímicas , MicroRNAs , Neoplasias Ovarianas , Humanos , Neoplasias Ovarianas/diagnóstico , Neoplasias Ovarianas/genética , Feminino , Técnicas Biossensoriais/métodos , MicroRNAs/análise , MicroRNAs/genética
2.
Semina cienc. biol. saude ; 45(2): 35-44, jul./dez. 2024. tab; ilus
Artigo em Português | LILACS | ID: biblio-1554878

RESUMO

O aplicativo móvel CalcVAN foi desenvolvido para auxiliar os profissionais de saúde para otimizar as doses de vancomicina em pacientes hospitalizados. Porém, é imprescindível avaliar a sua usabilidade antes de disponibilizá-lo para prática clínica. Assim, o objetivo do estudo é avaliar a usabilidade do aplicativo móvel na perspectiva dos profissionais de saúde. Trata-se de um estudo descritivo, de avaliação heurística da usabilidade de um aplicativo móvel. Foram convidados profissionais da área de saúde com expertise no tema de gerenciamento de antimicrobianos e vancomicina. O instrumento validado Smartphone Usability questionnaiRE (SURE) foi utilizado para mensuração da usabilidade por meio de um questionário on-line. Vinte e um especialistas participaram do estudo, com média de idade de 32,6 anos, sendo a maioria de mulheres (n = 14, 66,7%), profissionais farmacêuticos (n = 13, 61,9%), com pós-graduação lato sensu (n = 10, 47,6%), que trabalhavam em hospitais públicos ou privados (n = 15, 71,4%) e com média de experiência em 9,7 anos. Com base na interpretação dos resultados obtidos pelo instrumento SURE, a média de usabilidade geral do CalcVAN foi de 83 pontos, com escore menor de 78 e maior de 90 pontos. O teste de usabilidade foi enquadrado nos dois últimos níveis, 70 e 80, onde os profissionais de saúde passaram a concordar fortemente e totalmente, indicando que o aplicativo móvel apresenta uma usabilidade satisfatória. O CalcVAN atingiu uma usabilidade satisfatória e atende as necessidades e exigências dos profissionais de saúde, mostrando--se eficiente para realizar as funções propostas.


The CalcVAN app was developed to assist healthcare professionals in optimizing vancomycin doses for hospitalized patients. However, the usability test before making it available for clinical practice is essential. Therefore, the study aims to evaluate the usability of the app from the perspective of health professionals. A descriptive study, a heuristic evaluation of the usability of a mobile application was conducted. Healthcare professionals with expertise in antimicrobial management and vancomycin were invited to participate. The validated Smartphone Usability questionnaiRE (SURE) was used to measure usability through an online questionnaire. Twenty-one experts participated in the study, with a mean age of 32.6 years, mostly of them women (n = 14, 66.7%), pharmacists (n = 13, 61.9%), with postgraduate education (n = 10, 47.6%), working in private or public hospitals (n = 15, 71.4%), and a mean experience of 9.7 years. Overall usability score for CalcVAN was 83 points, ranging from a minimum of 78 to a maximum of 90 points. The usability test registered within the last two levels, 70 and 80, with users expressing strongly and fully agreed, indicating that the app demonstrates satisfactory usability. CalcVAN achieved satisfactory usability, fulfilling the needs and requirements of health professionals, proving to be efficient in performing the intended functions.


Assuntos
Humanos , Masculino , Feminino , Adulto
3.
Adv Mater ; : e2410054, 2024 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-39226533

RESUMO

Coinage metal nanoclusters (NCs), comprising a few to several hundred atoms, are prized for their size-dependent properties crucial in catalysis, sensing, and biomedicine. However, their practical application is often hindered by stability and reactivity challenges. Thiacalixarene, a macrocyclic ligand, shows promise in stabilizing silver, copper, and bimetallic NCs, enhancing their structural integrity and chemical stability. This investigation delves into the unique properties of thiacalix[4]arene and their role in bolstering NC stability, catalytic efficiency, and sensing capabilities. The current challenges and future prospects are critically evaluated, underscoring the transformative impact of thiacalix[4]arene in nanoscience. This review aims to broaden the utilization of atomically precise coinage metal NCs, unlocking new avenues across scientific and industrial applications.

4.
J Med Internet Res ; 26: e57827, 2024 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-39226552

RESUMO

BACKGROUND: Wearable digital health technologies and mobile apps (personal digital health technologies [DHTs]) hold great promise for transforming health research and care. However, engagement in personal DHT research is poor. OBJECTIVE: The objective of this paper is to describe how participant engagement techniques and different study designs affect participant adherence, retention, and overall engagement in research involving personal DHTs. METHODS: Quantitative and qualitative analysis of engagement factors are reported across 6 unique personal DHT research studies that adopted aspects of a participant-centric design. Study populations included (1) frontline health care workers; (2) a conception, pregnant, and postpartum population; (3) individuals with Crohn disease; (4) individuals with pancreatic cancer; (5) individuals with central nervous system tumors; and (6) families with a Li-Fraumeni syndrome affected member. All included studies involved the use of a study smartphone app that collected both daily and intermittent passive and active tasks, as well as using multiple wearable devices including smartwatches, smart rings, and smart scales. All studies included a variety of participant-centric engagement strategies centered on working with participants as co-designers and regular check-in phone calls to provide support over study participation. Overall retention, probability of staying in the study, and median adherence to study activities are reported. RESULTS: The median proportion of participants retained in the study across the 6 studies was 77.2% (IQR 72.6%-88%). The probability of staying in the study stayed above 80% for all studies during the first month of study participation and stayed above 50% for the entire active study period across all studies. Median adherence to study activities varied by study population. Severely ill cancer populations and postpartum mothers showed the lowest adherence to personal DHT research tasks, largely the result of physical, mental, and situational barriers. Except for the cancer and postpartum populations, median adherences for the Oura smart ring, Garmin, and Apple smartwatches were over 80% and 90%, respectively. Median adherence to the scheduled check-in calls was high across all but one cohort (50%, IQR 20%-75%: low-engagement cohort). Median adherence to study-related activities in this low-engagement cohort was lower than in all other included studies. CONCLUSIONS: Participant-centric engagement strategies aid in participant retention and maintain good adherence in some populations. Primary barriers to engagement were participant burden (task fatigue and inconvenience), physical, mental, and situational barriers (unable to complete tasks), and low perceived benefit (lack of understanding of the value of personal DHTs). More population-specific tailoring of personal DHT designs is needed so that these new tools can be perceived as personally valuable to the end user.


Assuntos
Aplicativos Móveis , Humanos , Estudos de Coortes , Feminino , Tecnologia Digital , Participação do Paciente/métodos , Dispositivos Eletrônicos Vestíveis , Tecnologia Biomédica/métodos , Masculino , Adulto , Gravidez , Saúde Digital
5.
Adv Colloid Interface Sci ; 333: 103297, 2024 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-39226799

RESUMO

Microalgae are microorganisms that are rich in bioactive compounds, including pigments, proteins, lipids, and polysaccharides. These compounds can be utilized for a number of biomedical purposes, including drug delivery, wound healing, and tissue engineering. Nevertheless, encapsulating microalgae cells and microalgae bioactive metabolites is vital to protect them and prevent premature degradation. This also enables the development of intelligent controlled release strategies for the bioactive compounds. This review outlines the most employed encapsulation techniques for microalgae, with a particular focus on their biomedical applications. These include ionic gelation, oil-in-water emulsions, and spray drying. Such techniques have been widely explored, due to their ability to protect sensitive compounds from degradation, enhance their stability, extend their shelf life, mask undesirable tastes or odours, control the release of bioactive compounds, and enable targeted delivery to specific sites within the body or environment. Moreover, a patent landscape analysis is also provided, allowing an overview of the microalgae encapsulation technology development applied to a variety of fields, including pharmaceuticals, cosmetics, food, and agriculture.

6.
Carbohydr Polym ; 345: 122571, 2024 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-39227106

RESUMO

Konjac glucomannan (KGM) molecular chains contain a small amount of acetyl groups and a large number of hydroxyl groups, thereby exhibiting exceptional water retention and gel-forming properties. To meet diverse requirements, KGM undergoes modification processes such as oxidation, acetylation, grafting, and cationization, which reduce its viscosity, enhance its mechanical strength, and improve its water solubility. Researchers have found that KGM and its derivatives can regulate the polarization of macrophages, inducing their transformation into classically activated M1-type macrophages or alternatively activated M2-type macrophages, and even facilitating the interconversion between M1 and M2 phenotypes. Concurrently, the modulation of macrophage polarization states holds significant importance for chronic wound healing, inflammatory bowel disease (IBD), antitumor therapy, tissue engineering scaffolds, oral vaccines, pulmonary delivery, and probiotics. Therefore, KGM has the advantages of both immunomodulatory effects (biological activity) and gel-forming properties (physicochemical properties), giving it significant advantages in a variety of biomedical engineering applications.


Assuntos
Macrófagos , Mananas , Mananas/química , Mananas/farmacologia , Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Humanos , Animais , Engenharia Tecidual/métodos
7.
ACS Biomater Sci Eng ; 2024 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-39227180

RESUMO

With the accelerating trend of global aging, bone damage caused by orthopedic diseases, such as osteoporosis and fractures, has become a shared international event. Traffic accidents, high-altitude falls, and other incidents are increasing daily, and the demand for bone implant treatment is also growing. Although extensive research has been conducted in the past decade to develop medical implants for bone regeneration and healing of body tissues, due to their low biocompatibility, weak bone integration ability, and high postoperative infection rates, pure titanium alloys, such as Ti-6A1-4V and Ti-6A1-7Nb, although widely used in clinical practice, have poor induction of phosphate deposition and wear resistance, and Ti-Zr alloy exhibits a lack of mechanical stability and processing complexity. In contrast, the Ti-Ni alloy exhibits toxicity and low thermal conductivity. Nonthermal plasma (NTP) has aroused widespread interest in synthesizing and modifying implanted materials. More and more researchers are using plasma to modify target catalysts such as changing the dispersion of active sites, adjusting electronic properties, enhancing metal carrier interactions, and changing their morphology. NTP provides an alternative option for catalysts in the modification processes of oxidation, reduction, etching, coating, and doping, especially for materials that cannot tolerate thermodynamic or thermosensitive reactions. This review will focus on applying NTP technology in bone implant material modification and analyze the overall performance of three common types of bone implant materials, including metals, ceramics, and polymers. The challenges faced by NTP material modification are also discussed.

8.
Artigo em Inglês | MEDLINE | ID: mdl-39227344

RESUMO

Myocardial infarction (MI) is a serious cardiovascular disease with high morbidity and mortality rates, posing a significant threat to patient's health and quality of life. Following a MI, the damaged myocardial tissue is typically not fully repaired, leading to permanent impairment of myocardial function. While traditional treatments can alleviate symptoms and reduce pain, their ability to repair damaged heart muscle tissue is limited. Functionalized hydrogels, a broad category of materials with diverse functionalities, can enhance the properties of hydrogels to cater to the needs of tissue engineering, drug delivery, medical dressings, and other applications. Recently, functionalized hydrogels have emerged as a promising new therapeutic approach for the treatment of MI. Functionalized hydrogels possess outstanding biocompatibility, customizable mechanical properties, and drug-release capabilities. These properties enable them to offer scaffold support, drug release, and tissue regeneration promotion, making them a promising approach for treating MI. This paper aims to evaluate the advancements and delivery methods of functionalized hydrogels for treating MI, while also discussing their potential and the challenges they may pose for future clinical use.

9.
J Behav Med ; 2024 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-39225842

RESUMO

OBJECTIVE: Examine the feasibility and acceptability of a social identity-informed, online delivered, running and walking group program to support low-active post-secondary students' exercise behavior and well-being during the COVID-19 pandemic. METHODS: A two-arm, non-blinded, parallel pilot randomized controlled trial was conducted whereby low-active post-secondary students at a Canadian university were equally randomized to an online delivered running/walking group program or an attention control condition. Primary feasibility and acceptability outcomes included program interest, study enrolment and retention, questionnaire completion, program attendance, program satisfaction, and affective exercise attitudes. Post-program interviews were conducted to ascertain participants' experiences with the program. Secondary outcomes included well-being, exercise behavior, social identity, social support, and exercise identity. RESULTS: Ninety-two individuals were screened for eligibility, and 72 were equally randomized to the online group program or attention control condition. Recruitment exceeded the target sample size (60), study adherence and questionnaire completion were above 90%, program attendance was moderate (M = 5.03/8), self-report program satisfaction was moderate-to-high (M = 4.13/5), and there was no condition effect for affective attitudes. During interviews, participants expressed satisfaction with the program. They also discussed challenges with developing a shared sense of identity and social connection with group members via online platforms. There were small condition effects for exercise-related well-being and exercise identity and no condition effects for the remaining secondary outcomes. Social identity scores were moderate (M = 4.63/7). CONCLUSIONS: The STRIDE program was feasible and acceptable but should be delivered and piloted in-person before a full-scale efficacy trial is conducted. TRIAL REGISTRATION: ClinicalTrials.gov NCT04857918; 2021-04-20.

10.
Curr Med Chem ; 2024 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-39229987

RESUMO

Capsaicin analogs, whether sourced from natural origins or synthesized de novo, have garnered significant attention across diverse scientific disciplines. This comprehensive investigation explores the expansive domain of medicinal chemistry and pharmacology, focusing on capsaicin and its analogs. Notably, these analogs exhibit a wideranging pharmacological spectrum, with a particular emphasis on their potent antitumor properties. Researchers frequently explore structural modifications, particularly in region C, consistently enhancing their pharmacological activities. A highlighted finding is that analogs with alterations in both regions A and C manifest a diverse array of effects, spanning from anti-obesity to protection against ischemia. They also demonstrate anti- Alzheimer's, anti-fibrotic, anti-inflammatory, anti-diabetic, antimalarial, and anti-epileptic properties. This underscores the potential of structural adaptations in these regions, expanding the therapeutic applications of capsaicin-like compounds. Additionally, manipulations in regions B and C result in compounds that possess antioxidant and anti-obesity properties, providing valuable insights for the development of novel compounds. The therapeutic potential of capsaicin analogs opens innovative avenues for drug design and development, promising to address a broad spectrum of diseases and enhance global quality of life. Moreover, this article meticulously examines various synthetic methodologies for synthesizing capsaicin analogs, complementing the main review. These methodologies distinguish themselves through their simplicity, mild reaction conditions, and reliance on readily available commercial reagents. The accessible synthesis pathways enable researchers from diverse backgrounds to explore these compounds, fostering investigations and potential therapeutic applications.

11.
ACS Biomater Sci Eng ; 2024 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-39230397

RESUMO

We successfully synthesized folic acid (FA) immobilized hydroxyapatite (HA) nanoparticles without using a mediative reagent (e.g., silane coupling agent), and the immobilization states were evaluated and discussed. The HA nanoparticles with higher biocompatibility have two different planes, namely, c- and m-planes. These plane surfaces are rich in phosphate groups (P-site) and Ca2+ ions (C-site), respectively. We suggested that during the synthesis of the HA nanoparticles, the P-site substitution and C-site coordination with the addition of organic molecules containing -COO- ions can occur. Thus, it is possible to simultaneously immobilize two molecules to one HA nanoparticle. In this study, we successfully synthesized FA-immobilized HA nanoparticles by P-site substitution and C-site coordination reactions, which were named as substitution type and coordination type. In the substitution type, when FA was reacted with HA during the nucleation stage, the PO43- ions of HA decreased as the FA ratio of coverage surface area increased, and the crystalline phase was changed significantly from the Ca deficient HA to the carbonated HA phase. Accordingly, it was indicated that FA was immobilized on HA by the P-site substitution. In the coordination type, since FA was reacted with HA after the completion of crystal growth, the crystalline phase was changed slightly as the FA ratio of coverage surface area increased, indicating that FA was immobilized on HA by the C-site coordination. From the above, we controlled the FA immobilization states on the HA nanoparticles by the P-site substitution and the C-site coordination through the FA addition timing in the synthesis. Since the -COO- ions in FA could be selectively substituted with the P-site in HA, it is possible to directly coordinate the foreign organic molecules to the Ca2+ ions in HA. Therefore, the immobilization technique of this study is expected to achieve two different drug molecules with diagnosis and therapy functions (i.e., theranostics) on one nanoparticle.

12.
Int J Biol Macromol ; : 135353, 2024 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-39245104

RESUMO

Aptamers have been widely researched and applied in nanomedicine due to their programmable, activatable, and switchable properties. However, there are few reviews on aptamer-controlled stimuli-responsive drug delivery. This article highlights the mechanisms and advantages of aptamers in the construction of stimuli-responsive drug delivery systems. We summarize the assembly/reconfiguration mechanisms of aptamers in controlled release systems. The assembly and drug release strategies of drug delivery systems are illustrated. Specifically, we focus on the binding mechanisms to the target, and the factors that induce/inhibit the binding to the stimuli, such as strand, pH, light, and temperature. The applications of aptamer-based stimuli-responsive drug release are elaborated. The challenges are discussed, and the future directions are proposed.

13.
Int J Biol Macromol ; : 135397, 2024 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-39245115

RESUMO

Food gel is a kind of macromolecular biopolymer with viscoelasticity, which has good water retention and gelling ability, especially gels formed by protein and/or polysaccharide. The addition of calcium ions triggers gelation by interacting with the gel matrix, enhancing gels' textural and rheological properties like hardness, viscosity and elasticity. Thus calcium ions enrich the range of applications of food gels. This review focuses on forming a calcium-induced gel and improving the texture properties. It summarizes the mechanisms of gelation induced by calcium ions in polysaccharide, protein, and polysaccharide-protein systems and their gel properties. The effects of influencing factors in calcium ion concentration, types and mixing ratios of matrices, acid, and alkaline environments, as well as treatment methods on calcium-induced gel characteristics, are presented. Additionally, the current applications of calcium-induced gels in food industries and challenges are presented.

14.
Int J Biol Macromol ; : 135357, 2024 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-39245118

RESUMO

Biomaterials play vital roles in regenerative medicine, specifically in tissue engineering applications. They promote angiogenesis and facilitate tissue creation and repair. The most difficult aspect of this field is acquiring smart biomaterials that possess qualities and functions that either surpass or are on par with those of synthetic products. The biocompatibility, biodegradability, film-forming capacity, and hydrophilic nature of the non-sulfated glycosaminoglycans (GAGs) (hyaluronic acid (HA) and chitosan (CS)) have attracted significant attention. In addition, CS and HA possess remarkable inherent biological capabilities, such as antimicrobial, antioxidant, and anti-inflammatory properties. This review provides a comprehensive overview of the recent progress made in designing and fabricating CS/HA-based hybrid materials for dermatology applications. Various formulations utilizing CS/HA have been developed, including hydrogels, microspheres, films, foams, membranes, and nanoparticles, based on the fabrication protocol (physical or chemical). Each formulation aims to enhance the materials' remarkable biological properties while also addressing their limited stability in water and mechanical strength. Additionally, this review gave a thorough outline of future suggestions for enhancing the mechanical strength of CS/HA wound dressings, along with methods to include biomolecules to make them more useful in skin biomedicine applications.

15.
Compr Rev Food Sci Food Saf ; 23(5): e70016, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39245918

RESUMO

Frozen and thawed meat plays an important role in stabilizing the meat supply chain and extending the shelf life of meat. However, traditional methods of research and development (R&D) struggle to meet rising demands for quality, nutritional value, innovation, safety, production efficiency, and sustainability. Frozen and thawed meat faces specific challenges, including quality degradation during thawing. Artificial intelligence (AI) has emerged as a promising solution to tackle these challenges in R&D of frozen and thawed meat. AI's capabilities in perception, judgment, and execution demonstrate significant potential in problem-solving and task execution. This review outlines the architecture of applying AI technology to the R&D of frozen and thawed meat, aiming to make AI better implement and deliver solutions. In comparison to traditional R&D methods, the current research progress and promising application prospects of AI in this field are comprehensively summarized, focusing on its role in addressing key challenges such as rapid optimization of thawing process. AI has already demonstrated success in areas such as product development, production optimization, risk management, and quality control for frozen and thawed meat. In the future, AI-based R&D for frozen and thawed meat will also play an important role in promoting personalization, intelligent production, and sustainable development. However, challenges remain, including the need for high-quality data, complex implementation, volatile processes, and environmental considerations. To realize the full potential of AI that can be integrated into R&D of frozen and thawed meat, further research is needed to develop more robust and reliable AI solutions, such as general AI, explainable AI, and green AI.


Assuntos
Inteligência Artificial , Carne , Animais , Congelamento , Conservação de Alimentos/métodos
16.
Cell Signal ; 124: 111380, 2024 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-39236835

RESUMO

Gliomas, the most prevalent malignant brain tumors in the central nervous system, are marked by rapid growth, high recurrence rates, and poor prognosis. Glioblastoma (GBM) stands out as the most aggressive subtype, characterized by significant heterogeneity. The etiology of gliomas remains elusive. RNA modifications, particularly reversible methylation, play a crucial role in regulating transcription and translation throughout the RNA lifecycle. Increasing evidence highlights the prevalence of RNA methylation in primary central nervous system malignancies, underscoring its pivotal role in glioma pathogenesis. This review focuses on recent findings regarding changes in RNA methylation expression and their effects on glioma development and progression, including N6-methyladenosine (m6A), 5-methylcytosine (m5C), N1-methyladenosine (m1A), and N7-methylguanosine (m7G). Given the extensive roles of RNA methylation in gliomas, the potential of RNA methylation-related regulators as prognostic markers and therapeutic targets was also explored, aiming to enhance clinical management and improve patient outcomes.

17.
Sci Rep ; 14(1): 20767, 2024 Sep 05.
Artigo em Inglês | MEDLINE | ID: mdl-39237537

RESUMO

This study aims to enhance the tribological properties of automotive applications by examining the effects of TiC content on the microstructure, mechanical properties, and wear behavior. This study investigates the production of Al-TiC composite strips using a novel multi-step densification process combining mechanical alloying and hot rolling with TiC concentrations ranging from 0 to 12 vol%. The novelty of this work lies in its comprehensive approach to developing and analyzing Al-TiC composite strips using a multistep densification method. This study integrates microstructural analysis, mechanical property evaluation, and detailed tribological behavior assessment under different wear loads (5-25 N). A key innovation is the application of the Abbott Firestone method to analyze worn surfaces, providing insights into optimal wear conditions. The study reveals that increasing the TiC content to 12 vol% significantly improves densification, hardness (up to 268.8% increase), and wear resistance (up to 95% improvement at a 5N load). Dry ball-on-flat sliding wear tests at loads of 5-25N demonstrate that TiC particles hindered complete delamination wear in the composite strips. The Abbott Firestone method analysis of worn surfaces indicated an optimal exploitation zone in the Al-6 vol% TiC composite at both low and high wear loads. This comprehensive approach provides valuable insights into optimizing Al-TiC composites for enhanced performance in automotive components that require improved wear resistance.

18.
Talanta ; 280: 126790, 2024 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-39217711

RESUMO

Metallic nanoparticles (MNPs) have attracted great interest among scientists and researchers for years due to their unique optical, physiochemical, biological, and magnetic properties. As a result, MNPs have been widely utilized across a variety of scientific fields, including biomedicine, agriculture, electronics, food, cosmetics, and the environment. In this regard, the current review article offers a comprehensive overview of recent studies on the synthesis of MNPs (metal and metal oxide nanoparticles), outlining the benefits and drawbacks of chemical, physical, and biological methods. However, the biological synthesis of MNPs is of great importance considering the biocompatibility and biological activity of certain MNPs. A variety of characterization techniques, including X-ray diffraction, transmission electron microscopy, UV-visible spectroscopy, scanning electron microscopy, dynamic light scattering, atomic force microscopy, Fourier transform infrared spectroscopy, and others, have been discussed in depth to gain deeper insights into the unique structural and spectroscopic properties of MNPs. Furthermore, their unique properties and applications in the fields of medicine, agriculture, and the environment are summarized and deeply discussed. Finally, the main challenges and limitations of MNPs synthesis and applications, as well as their future prospects have also been discussed.

19.
Carbohydr Polym ; 344: 122488, 2024 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-39218536

RESUMO

The marine ecosystem contains an assorted range of organisms, among which macroalgae stands out marine resources as an invaluable reservoir of structurally diverse bioactive compounds. Marine macroalgae are considered as primary consumers have gained more attention for their bioactive components. Sulfated polysaccharides (SPs) are complex polymers found in macroalgae that play a crucial role in their cell wall composition. This review consolidates high-tech methodologies employed in the extraction of macroalgal SPs, offering a valuable resource for researchers focuses in the pharmacological relevance of marine macromolecules. The pharmacological activities of SPs, focusing on their therapeutic action by encompassing diverse study models are summarized. Furthermore, in silico docking studies facilitates a comprehensive understanding of SPs interactions with their binding sites providing a valuable insight for future endeavors. The biological properties of algal SPs, along with a brief reference to mode of action based on different targets are presented. This review utilizes up-to-date research discoveries across various study models to elucidate the biological functions of SPs, focusing on their molecular-level mechanisms and offering insights for prospective investigations. Besides, the significance of SPs from seaweeds is highlighted, showcasing their potential beneficial applications in promoting human health. With promising biomedical prospects, this review explores the extensive uses and experimental evidence supporting the important roles of SPs in various fields.


Assuntos
Polissacarídeos , Alga Marinha , Sulfatos , Alga Marinha/química , Polissacarídeos/química , Polissacarídeos/farmacologia , Humanos , Sulfatos/química , Animais
20.
Cancer Med ; 13(17): e7079, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39248010

RESUMO

BACKGROUND: Cancer survivors are at greater risk for cardiovascular-related mortality. Mobile health (mHealth) is an increasingly prevalent strategy for health promotion, but whether it consistently improves cardiorespiratory outcomes after a cancer diagnosis is unknown. We sought to determine the effectiveness of mHealth fitness/physical activity interventions on cardiorespiratory fitness outcomes among cancer patients and survivors. METHODS: Leveraging MEDLINE/PubMed, Scopus, and ClinicalTrials.gov, we identified studies through May 2023. Included studies provided a quantitative evaluation of an mHealth intervention in a primary or secondary capacity on cardiorespiratory fitness (6-minute walk test, VO2max, 3-minute step test, or systolic blood pressure; or any mention of cardiac measure) and were meta-analyzed (using a random effects model) if they were a randomized controlled trial with sufficient quantitative information. Four coders were involved in applying inclusion/exclusion criteria, coding using a standardized data extraction sheet, and assessing study quality, with each study coded by at least two. RESULTS: Of 656 articles, nine (n = 392) met systematic review inclusion criteria (mean age range 19-62 years, 71.9% female, 60.9% breast cancer). Interventions included mobile apps (k = 6), smartwatches (k = 2), or a smartwatch plus a supplemental web/mobile/tablet app (k = 1); median duration of mHealth-use was 12 weeks. Seven (n = 341) fit criteria for meta-analysis. mHealth was associated with improved cardiorespiratory fitness (d = 0.33; 95% CI = 0.07-0.60) compared to a control group. Relationships remained after accounting for lipid-based outcomes (d = 0.30; 95% CI = 0.03-0.56). There was no evidence for heterogeneity or publication-bias. CONCLUSIONS: mHealth exercise interventions appear to be a viable strategy for improving cardiorespiratory fitness after a cancer diagnosis.


Assuntos
Aptidão Cardiorrespiratória , Promoção da Saúde , Neoplasias , Telemedicina , Humanos , Promoção da Saúde/métodos , Feminino , Sobreviventes de Câncer , Masculino , Pessoa de Meia-Idade , Exercício Físico/fisiologia , Adulto , Adulto Jovem
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