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1.
Heliyon ; 10(7): e29150, 2024 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-38601679

RESUMO

A novel eco-friendly high throughput continuous hydrothermal flow system was used to synthesise phase pure ZnO and doped ZnO in order to explore their properties for tissue engineering applications. Cerium, zirconium, and copper were introduced as dopants during flow synthesis of ZnO nanoparticles, Zirconium doped ZnO were successfully synthesised, however secondary phases of CeO and CuO were detected in X-ray diffraction (XRD). The nanoparticles were characterised using X-ray diffraction, Brunauer-Emmett-Teller (BET), Dynamic Light scattering Measurements, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and RAMAN spectroscopy was used to evaluate physical, chemical, and structural properties. The change in BET surface area was also significant, the surface area increased from 11.35 (ZnO_2) to 26.18 (ZrZnO_5). However. In case of CeZnO_5 and CuZnO_5 was not significant 13.68 (CeZnO_5) and 12.16 (CuZnO_5) respectively. Cell metabolic activity analysis using osteoblast-like cells (MG63) and human embryonic derived mesenchymal stem cells (hES-MP) demonstrated that doped ZnO nanoparticles supported higher cell metabolic activity compared to cells grown in standard media with no nanoparticles added, or pure zinc oxide nanoparticles. The ZrZnO_5 demonstrated the highest cell metabolic activity and non-cytotoxicity over the duration of 28 days as compared to un doped or Ce or Cu incorporated nanoparticles. The current data suggests that Zirconium doping positively enhances the properties of ZnO nanoparticles by increasing the surface area and cell proliferation. Therefore, are potential additives within biomaterials or for tissue engineering applications.

2.
Plants (Basel) ; 13(8)2024 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-38674520

RESUMO

Physiological maturity impacts seed quality through various mechanisms including vigor, desiccation tolerance, dormancy induction, synthesis of raw materials (including seed storage proteins), and the reorganization of metabolisms. Peanut seed development can be classified into seven classes with four incremental stages per class. Based on the mesocarp color, the final three stages are commonly referred to as "orange", "brown", and "black". In 2017, freshly harvested pods from one genotype of runner market-type peanuts grown under conventional practices were obtained from the University of Georgia research facility. The pods were removed from the plant material and 'pod blasted' to reveal the mesocarp. After separation, the remainder of the pod outer layer was removed, and the seeds were segregated for proteomic analysis. The raw peanuts were analyzed by bottom-up LC-MS/MS proteomics, which was conducted by the Proteomics Resource Center at the Rockefeller University, to identify the significant protein composition differences in each maturity class. The proteomic data revealed differentially expressed proteins as a function of maturity class with multiple functions including plant defense, metabolism, cell signaling, nutrient accumulation, and packaging. Understanding the processes needed for seed maturation will enable peanut scientists to evaluate the traits needed for robust germination, hardiness of the seed in response to disease, and nutrient quality.

3.
Int J Speech Lang Pathol ; : 1-12, 2024 Feb 21.
Artigo em Inglês | MEDLINE | ID: mdl-38383995

RESUMO

PURPOSE: Little is known about how people living with dysphagia in rural, socioeconomically impoverished contexts in Africa are supported and manage their disability. This scoping review sought to map and synthesise evidence relating to the management of dysphagia in adults in community/home settings in Africa as a starting point for a broader study on this topic. METHOD: A multifaceted search strategy involved searches of electronic databases and grey literature, hand searches, ancestry searches, and consultation with expert advisors. Records were screened by two blinded researchers. Characteristics of included studies were summarised, and their findings synthesised using the Framework approach. RESULT: Six studies were included, relating to services for people with dysphagia secondary to various aetiologies. No grey literature was identified that provided service delivery descriptions or practice guidance. This limited evidence suggests little professional support is available to people living with dysphagia in the community. Individuals and carers use a range of strategies, including choosing different food and drink items and modifying how food is chewed and swallowed. CONCLUSION: Further research is required to understand current practice in managing dysphagia in the community in Africa, and the needs and priorities of community members who experience dysphagia and their carers.

4.
J Dent Child (Chic) ; 90(2): 70-75, 2023 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-37621045

RESUMO

The use of animal-assisted therapy (AAT) in pediatric dental practices is a relatively new approach for behavior management, with few studies gauging interest in its use from the provider's perspective. The purpose of this study was to assess pediatric dentists' interest in and concerns with the use of AAT and identify its challenges and limitations. A survey was sent to the membership of the American Academy of Pediatric Dentistry, comprising questions about providers' practices and their views on the benefits of and concerns about implementing AAT. Ninety-two percent of the respondents felt that pet therapy would improve a patient's comfort; 67 percent indicated they expected a moderate or strong improvement, but only eight percent expected no improvement. Hygiene (26 percent) and liability (26 percent) were the main reservations about its use. This paper illustrates that the profession is open to AAT for behavior guidance and offers ways to incorporate it into practice.


Assuntos
Terapia Assistida com Animais , Animais , Humanos , Odontopediatria , Academias e Institutos , Terapia Comportamental , Odontólogos
5.
J Nurs Educ ; 62(7): 387-392, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37413675

RESUMO

BACKGROUND: For many years, universities have placed a strong emphasis on providing students with an internationalization experience through study-abroad programs; however, the recent pandemic led many universities to look for alternatives to continue offering students an international experience. METHOD: This article describes the implementation and evaluation of a collaborative online international learning (COIL) experience between nursing students in Australia and the United Kingdom. RESULTS: Students explored community spirit in the recovery from COVID-19. Students positively rated the experience and shared insights and outcomes gained from the program. CONCLUSION: The COIL experience exposed nursing students from Australia and the United Kingdom to learn about public health issues and develop cultural awareness and a sense of global community. Future programs should evaluate the long-term effects on students' nursing practice and their careers. [J Nurs Educ. 2023;62(7):387-392.].


Assuntos
COVID-19 , Bacharelado em Enfermagem , Estudantes de Enfermagem , Humanos , COVID-19/epidemiologia , Aprendizagem , Austrália
7.
Int J Speech Lang Pathol ; 25(1): 1-8, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36856150

RESUMO

PURPOSE: Communication is central to the accomplishment of each of the United Nations' 17 Sustainable Development Goals (SDGs) and is a fundamental human right. METHOD: This special issue of the International Journal of Speech-Language Pathology (IJSLP, vol. 25, no. 1) is dedicated to communication, swallowing and the SDGs; particularly focussing on people with communication and/or swallowing disability and those who support them. RESULT: The papers in the special issue of IJSLP demonstrate that successful communication is necessary for realisation of all 17 SDGs at both a global and an individual level and advance the international call for SDG 18: Communication for All. The 36 papers address all 17 goals, focussing on poverty, hunger, health, education, work, innovation, climate, cities, land, oceans, justice, and partnerships. Authors worked and undertook their research in Australia, Austria, Benin, Cambodia, Cameroon, Canada, China, Columbia, Denmark, Egypt, Ethiopia, Ghana, Greece, Iceland, India, Iraq, Ireland, Italy, Jordan, Kenya, Lebanon, Maldives, Mozambique, Nepal, New Zealand, Nigeria, State of Palestine, Peru, Philippines, Rwanda, Serbia, South Africa, Uganda, UK, USA, Vietnam. CONCLUSION: Communication for all is essential for the achievement of the SDGs, "peace and prosperity for people and the planet" (United Nations, 2015a). Achievement of the SDGs is the role of all; including communication specialists, people with communication/swallowing disability, their families and communities.


Assuntos
Desenvolvimento Sustentável , Humanos , Filipinas , África do Sul , Nova Zelândia , Ruanda
8.
Am J Pathol ; 193(6): 796-812, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36906264

RESUMO

Antibiotic administration during early life has been shown to have lasting effects on the gut microbiota, which have been linked to sustained alterations in liver metabolism and adiposity. Recent investigations have discerned that the gut microbiota continues to develop toward an adult-like profile during adolescence. However, the impact of antibiotic exposure during adolescence on metabolism and adiposity is unclear. Herein, a retrospective analysis of Medicaid claims data was performed, which indicated that tetracycline class antibiotics are commonly prescribed for the systemic treatment of adolescent acne. The purpose of this was to discern the impact of a prolonged tetracycline antibiotic exposure during adolescence on the gut microbiota, liver metabolism, and adiposity. Male C57BL/6T specific pathogen-free mice were administered a tetracycline antibiotic during the pubertal/postpubertal adolescent growth phase. Groups were euthanized at different time points to assess immediate and sustained antibiotic treatment effects. Antibiotic exposure during adolescence caused lasting genera-level shifts in the intestinal bacteriome and persistent dysregulation of metabolic pathways in the liver. Dysregulated hepatic metabolism was linked to sustained disruption of the intestinal farnesoid X receptor-fibroblast growth factor 15 axis, a gut-liver endocrine axis that supports metabolic homeostasis. Antibiotic exposure during adolescence increased subcutaneous, visceral, and marrow adiposity, which intriguingly manifested following antibiotic therapy. This preclinical work highlights that prolonged antibiotic courses for the clinical treatment of adolescent acne may have unintended deleterious effects on liver metabolism and adiposity.


Assuntos
Adiposidade , Antibacterianos , Masculino , Camundongos , Animais , Antibacterianos/efeitos adversos , Estudos Retrospectivos , Camundongos Endogâmicos C57BL , Obesidade/metabolismo , Fígado/metabolismo , Tetraciclinas/metabolismo
9.
Cureus ; 15(2): e34782, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36915835

RESUMO

BACKGROUND:  At the onset of the coronavirus disease 2019 (COVID-19) pandemic, anesthesiology residency programs were impacted differently due to various factors such as the local severity of COVID-19, exposure to patient suffering, and inability to complete rotations. We sought to investigate the impact of local-level pandemic severity on the well-being of anesthesiology residents. METHODS:  This multi-site study surveyed postgraduate year two residents from 15 United States (US) anesthesiology programs using the Perceived Stress Scale, Mini-Z, Patient Health Questionnaire-9,WHO-5 Well-Being Index,and the Multidimensional Scale of Perceived Social Support before the pandemic (baseline survey) and during the first COVID-19 surge (post survey). RESULTS:  A total of 144 (65%) residents responded to the initial baseline survey; 73 (33%) responded to the post survey, and 49 (22%) completed both surveys. There was not a statistically significant difference in any well-being outcomes of participants between the surveys, nor was there a significant difference based on the severity of COVID-19 impact at the program's hospital. Male participants had higher perceived stress scores (ß = 4.05, 95%CI: 0.42, 7.67, P = 0.03) and lower social support from family (ß = -6.57, 95%CI: -11.64, -1.51, P = 0.01) at the post survey compared to female participants after controlling for baseline scores. Additionally, married participants or those with domestic partners reported higher perceived social support in the post survey (ß = 5.79, 95%CI: -0.65, 12.23, P = 0.03). CONCLUSION:  The local COVID-19 severity at a residency program did not disproportionately impact well-being scores among anesthesiology residents. Those most vulnerable to diminished well-being appeared to be male and single participants. As a result, targeted well-being interventions, including those aiming to increase social support, to higher-risk resident groups may be indicated. Future work is needed to assess the longstanding COVID-19 pandemic impacts on resident well-being.

10.
J Public Health Dent ; 83(1): 94-100, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36680347

RESUMO

OBJECTIVES: The Coronavirus Aid, Relief, and Economic Security (CARES) Act appropriated $100 billion to the Provider Relief Fund, allowing for direct payments to health care providers due to COVID-19. Few studies have evaluated participation in the Provider Relief Fund (PRF), and none have specifically looked at dental providers in the safety net. METHODS: We conducted a retrospective, secondary data analysis using a quasi-experimental cohort design of South Carolina dentists who received PRF payments, comparing those who did and did not participate in the safety net. Safety net practice was operationalized as those participating in Medicaid, and whether they provided care in dental health professional shortage areas, or rural communities. RESULTS: Of the 628 dental providers in South Carolina who received PRF payments, 34% were identified as Medicaid providers while 66% did not participate in Medicaid; we found no statistical difference between payments to Medicaid versus non-Medicaid dental providers. Of PRF payments to dental providers participating in South Carolina's Medicaid program, we found no difference between payments to rural and urban providers but did find that practices offering services in dental care shortage areas received less than providers practicing in counties not designated as a shortage area. CONCLUSIONS: The PRF achieved its goal of distributing financial support to providers affected by the COVID-19 pandemic. But without policy imperatives linked to need-based allocations or incentives for PRF recipients to serve safety net populations, we may later learn this was a missed opportunity for PRF.


Assuntos
COVID-19 , Odontólogos , Administração Financeira , Humanos , COVID-19/prevenção & controle , Pandemias , Políticas , Estudos Retrospectivos , South Carolina , Estados Unidos , Saúde da População Rural , Provedores de Redes de Segurança
11.
Int J Speech Lang Pathol ; 25(1): 183-187, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36511819

RESUMO

BACKGROUND: Equitable partnerships across borders, sectors and communities are integral in creating shared understanding, novel solutions and sustainable development. Sustainable development goal (SDG) 17: Partnerships for goals, focuses on strengthening global partnerships. This highlights the importance of partnership as a tool to support the achievement of all SDGs. Partnerships are particularly vital to creating sustainable and appropriate services to support people who experience communication or swallowing disability and their families, in under-served communities, where services and expert personnel may be limited and where innovative strategies are required for working with families and communities to improve service accessibility. PURPOSE: To reflect on key principles underpinning the creation of a speech-language pathologists' (SLPs') community of practice, designed to support SLPs from high-, low- and middle-income countries to develop equitable partnerships, aimed at supporting people who experience communication or swallowing disability their families. RESULT: We draw on the authors' experiences of building partnerships to enhance participation for people who experience communication or swallowing disability. We discuss the need for global partnerships and challenges with current funding mechanisms. CONCLUSION: We use the principles of the speech-language pathology community of practice and concepts from the Partnership Accelerator 2030 Agenda to frame reflections and recommendations. This commentary paper focuses on partnerships for the goals (SDG 17).


Assuntos
Transtornos da Comunicação , Desenvolvimento Sustentável , Humanos , Comunicação , Saúde Global , Objetivos
12.
Int J Speech Lang Pathol ; 25(1): 136-140, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36409597

RESUMO

PURPOSE: The right to communicate, by any means, is key to participation in peaceful and just societies. Participation relies on societal equality which, in turn, depends upon consensus that everyone has the same rights, as well as responsibility to uphold the rights of all. People who experience communication disability are, however, often invisible, misunderstood, stigmatised, and under-enumerated, particularly in resource-limited settings, including humanitarian contexts. A lack of identification and understanding of needs exclude this group from equal societal participation and exposes them to risks, including sexual and gender-based violence (SGBV), which has no place in a peaceful, just, and fair society.In this commentary we explore the importance of the full inclusion and participation of people who experience communication disability, to the fulfilment of Sustainable Development Goal (SDG) 16. RESULT: There is a lack of specialist assistance for people who experience communication disability in resource-limited and humanitarian contexts. A broader approach to community and service-provider capacity-building on communication disability demonstrates potential to build stronger institutions and increase societal inclusion and participation, thereby reducing exposure to risks, such as SGBV. Such approaches include increasing public understanding and use of accessible communication strategies, as well as addressing negative attitudes/behaviours and fear. CONCLUSION: Speech-language pathologists (SLPs) must be prepared to expand their spheres of influence and develop long-term relationships with stakeholders who can instigate change. This may involve de-emphasising our SLP credentials, instead rebranding ourselves as inclusion specialists, with a focus on communication disability.Increased inclusion, participation, and protection are achievable for people who experience communication disability if they are understood, counted, and served appropriately. This requires alignment of communication rights agendas with international development priorities. As such, this commentary paper focuses on peace, justice, and strong institutions (SDG16) and simultaneously addresses aspects of good health and wellbeing (SDG 3), gender equality (SDG 5), reduced inequalities (SDG 10), and partnerships for the goals (SDG 17).


Assuntos
Transtornos da Comunicação , Violência de Gênero , Humanos , Desenvolvimento Sustentável , Ruanda , Justiça Social
13.
S Afr J Commun Disord ; 69(1): e1-e5, 2022 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-36453795

RESUMO

Providing equitable support for people experiencing communication disability (CD) globally is a historical and contemporary challenge for the speech-language therapy profession. A group of speech-language therapists (SLTs) with ongoing and sustained experiences in Majority and Minority World contexts participated in five virtual meetings in 2021. The aim of these meetings was to develop provocative statements that might spur a global discussion among individuals and organisations that support people experiencing CD. The following questions were discussed: What is our vision for the future of the profession globally? What are the global challenges around access to speech-language therapy services?Four main themes emerged: (1) the need to centre people experiencing CD as the focal point of services, (2) participation, (3) equity and (4) community. The themes relate to the need for a process of de-imperialism in the profession. Suggestions were made to develop more suitable terminology and to establish a global framework that promotes more equitable access to communication services. We seek the adoption of approaches that focus on reciprocal global engagement for capacity strengthening. Alternative models of culturally sustaining and equitable service delivery are needed to create impact for people experiencing CD, and their families worldwide.Contribution: Provocative statements were developed to prompt global conversations among speech-language therapy professionals and associations. We encourage readers to consider the questions posed, share their viewpoints and initiate positive change towards a global strategy.


Assuntos
Terapia da Linguagem , Fala , Humanos , Fonoterapia , Comunicação , Vestuário
14.
Lab Anim (NY) ; 51(10): 246, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36151414
15.
A A Pract ; 15(6): e01488, 2021 Jun 02.
Artigo em Inglês | MEDLINE | ID: mdl-34081063

RESUMO

Kearns Sayre syndrome (KSS) is a rare mitochondrial myopathy that is associated with progressive impaired ventilatory drive, heart block, and peripheral neuropathy. Charcot-Marie-Tooth disease (CMT) is a rare chronic motor and sensory peripheral neuropathy which includes muscle weakness and restrictive pulmonary impairment. Patients with either condition having anesthesia can have postoperative respiratory failure. We report a 52-year-old man diagnosed with variants of KSS and CMT presenting for supraventricular tachycardia (SVT) ablation. This is the first report of successful perioperative management of a general anesthetic in a patient with both KSS and CMT.


Assuntos
Doença de Charcot-Marie-Tooth , Síndrome de Kearns-Sayre , Insuficiência Respiratória , Taquicardia Supraventricular , Anestesia Geral , Doença de Charcot-Marie-Tooth/complicações , Doença de Charcot-Marie-Tooth/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Taquicardia Supraventricular/cirurgia
16.
Disabil Rehabil ; 43(16): 2342-2352, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-31829046

RESUMO

PURPOSE: Although street-connected children with communication disability have been identified in Western Kenya, little is currently known about the impact of communication disability on this group. In order to inform future service development, this qualitative study sought to understand the experiences, views and needs of street-connected children with communication disability, and of their caregivers at home and at school. MATERIALS AND METHODS: 13 children, 12 caregivers and 12 school-based Learning Support Assistants participated in interactive sessions, semi-structured interviews and focus groups respectively. Interviews were translated, transcribed and analysed thematically, using framework analysis. RESULTS: Six main themes, with sub-themes, were identified: understanding and awareness of communication disability; the role of others; needs of the children and what might help; impact on those supporting the children; caregiver and Learning Support Assistant needs: support to better help the child; thoughts about the future. Participants' responses highlighted the importance of improving others' attitudes, awareness and willingness to adapt their communication, as well as a need for trusted relationships and some specialist help. CONCLUSION: Organisations working with street-connected children should take communication disability into account in their services and interventions. Input based on a social model of disability is likely to be acceptable.Implications for rehabilitationThe attitudes and behaviour of others affect how communication disability is experienced by street-connected children and their families.Intervention based on a social model of disability and aimed at improving the communication environment around the child is likely to be acceptable to children, caregivers and education support workers.Caregivers and education support workers want more training and support alongside specialist intervention.Communication at the level of the child is central to building trusted relationships, which are important to the success of street-connected children's rehabilitation and re-integration.


Assuntos
Cuidadores , Transtornos da Comunicação , Criança , Grupos Focais , Humanos , Quênia , Pesquisa Qualitativa
19.
Int J Lang Commun Disord ; 55(4): 618-628, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32383829

RESUMO

BACKGROUND: Collaboration between parents and speech and language therapists (SLTs) is seen as a key element in family-centred models. Collaboration can have positive impacts on parental and children's outcomes. However, collaborative practice has not been well described and researched in speech and language therapy for children and may not be easy to achieve. It is important that we gain a deeper understanding of collaborative practice with parents, how it can be achieved and how it can impact on outcomes. This understanding could support practitioners in daily practice with regard to achieving collaborative practice with parents in different contexts. AIMS: To set a research agenda on collaborative practice between parents and SLTs in order to generate evidence regarding what works, how, for whom, in what circumstances and to what extent. METHODS & PROCEDURES: A realist evaluation approach was used to make explicit what collaborative practice with parents entails. The steps suggested by the RAMESES II project were used to draft a preliminary programme theory about collaborative practice between parents and SLTs. This process generates explicit hypotheses which form a potential research agenda. DISCUSSION & CONCLUSIONS: A preliminary programme theory of collaborative practice with parents was drafted using a realist approach. Potential contextual factors (C), mechanisms (M) and outcomes (O) were presented which could be configured into causal mechanisms to help explain what works for whom in what circumstances. CMO configurations were drafted, based on the relevant literature, which serve as exemplars to illustrate how this methodology could be used. In order to debate, test and expand our hypothesized programme theory for collaborative practice with parents, further testing against a broader literature is required alongside research to explore the functionality of the configurations across contexts. This paper highlights the importance of further research on collaborative practice with parents and the potential value of realist evaluation methodology. What this paper adds Current policy in education, health and social care advocates for family-centred care and collaborative practice with parents. Thereby, collaborative practice is the preferred practice for SLTs and parents. In this paper, we explore collaborative practice and use a realist evaluation approach to achieve the aim of setting a research agenda in this area. Researchers use realist evaluation, a methodology originally developed by Pawson and Tilley in the 1990s, to explore the causal link between interventions and outcomes, summarized as what works, how, for whom, in what circumstances and to what extent. Realist evaluation provides a framework to explore configurations between contexts (C), mechanisms (M) and outcomes (O). We used this methodology to take a first step at making explicit what collaborative practice is and how it might be achieved in different contexts. We did this by drafting a preliminary programme theory about collaborative practice, where we made explicit what context factors and mechanisms might influence outcomes in collaborative practice between parents and SLTs. Based on this programme theory, we argue for the need to develop a research agenda on collaborative practice with parents of children with speech, language and communication needs. The steps between a programme theory and a research agenda could entail exploring each CMO, or step in the programme theory, and evaluating it against the existing literature-both within and beyond speech and language therapy-to see how far it stands up. In this way, gaps could be identified that could be converted into research questions that would stimulate debate about a research agenda on collaborative practice. Understanding how collaborative practice can be achieved in different contexts could support SLTs to use mechanisms to optimise collaborative practice intentionally and tailor interventions to the specific needs of families, thereby enhancing collaborative practice between parents and SLTs.


Assuntos
Comportamento Cooperativo , Pais/psicologia , Patologia da Fala e Linguagem/métodos , Atitude do Pessoal de Saúde , Feminino , Humanos , Transtornos do Desenvolvimento da Linguagem/terapia , Masculino , Avaliação de Programas e Projetos de Saúde , Pesquisa Qualitativa
20.
Mar Drugs ; 18(2)2020 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-32046368

RESUMO

Fucoidan is a brown algae-derived polysaccharide having several biomedical applications. This study simultaneously compares the anti-cancer activities of crude fucoidans from Fucus vesiculosus and Sargassum filipendula, and effects of low (LMW, 10-50 kDa), medium (MMW, 50-100 kDa) and high (HMW, >100 kDa) molecular weight fractions of S. filipendula fucoidan against osteosarcoma cells. Glucose, fucose and acid levels were lower and sulphation was higher in F. vesiculosus crude fucoidan compared to S. filipendula crude fucoidan. MMW had the highest levels of sugars, acids and sulphation among molecular weight fractions. There was a dose-dependent drop in focal adhesion formation and proliferation of cells for all fucoidan-types, but F. vesiculosus fucoidan and HMW had the strongest effects. G1-phase arrest was induced by F. vesiculosus fucoidan, MMW and HMW, however F. vesiculosus fucoidan treatment also caused accumulation in the sub-G1-phase. Mitochondrial damage occurred for all fucoidan-types, however F. vesiculosus fucoidan led to mitochondrial fragmentation. Annexin V/PI, TUNEL and cytochrome c staining confirmed stress-induced apoptosis-like cell death for F. vesiculosus fucoidan and features of stress-induced necrosis-like cell death for S. filipendula fucoidans. There was also variation in penetrability of different fucoidans inside the cell. These differences in anti-cancer activity of fucoidans are applicable for osteosarcoma treatment.


Assuntos
Linhagem Celular Tumoral/efeitos dos fármacos , Polissacarídeos/farmacologia , Apoptose/efeitos dos fármacos , Ciclo Celular/efeitos dos fármacos , Fucus/química , Humanos , Mitocôndrias/efeitos dos fármacos , Peso Molecular , Osteossarcoma , Phaeophyceae/química , Sargassum/química
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