Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.065
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Int J Cancer ; 2024 Aug 23.
Artigo em Inglês | MEDLINE | ID: mdl-39177494

RESUMO

Population-wide skin cancer screening is not currently recommended in most countries. Instead, most clinical guidelines incorporate risk-based recommendations for skin checks, despite limited evidence around implementation and adherence to recommendations in practice. We aimed to determine adherence to personal risk-tailored melanoma skin check schedules and explore reasons influencing adherence. Patients (with/without a previous melanoma) attending tertiary dermatology clinics at the Melanoma Institute Australia, Sydney, Australia, were invited to complete a melanoma risk assessment questionnaire via iPad and provided with personal risk information alongside a risk-tailored skin check schedule. Data were collected from the risk tool, clinician-recorded data on schedule deviations, and appointment booking system. Post-consultation, we conducted semi-structured interviews with patients and clinic staff. We used a convergent segregated mixed methods approach for analysis. Interviews were audio recorded, transcribed and data were analysed thematically. Participant data were analysed from clinic records (n = 247) and interviews (n = 29 patients, 11 staff). Overall, there was 62% adherence to risk-tailored skin check schedules. In cases of non-adherence, skin checks tended to occur more frequently than recommended. Decisions to deviate were similarly influenced by patients (44%) and clinicians (56%). Themes driving non-adherence among patients included anxiety and wanting autonomy around decision-making, and among clinicians included concerns around specific lesions and risk estimate accuracy. There was moderate adherence to a clinical service program of personal risk-tailored skin check recommendations. Further adherence may be gained by incorporating strategies to identify and assist patients with high levels of anxiety and supporting clinicians to communicate risk-based recommendations with patients.

2.
Small ; 20(7): e2305868, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37798640

RESUMO

Transition metal nitrides (TMNs) are promising electrode materials for use in high-performance electrochemical energy storage devices due to their unique properties, which include a high conductivity, pseudocapacitance, and energy density. However, structural instability during electrochemical reactions has limited their practical deployment for energy storage devices. In this context, the present study fabricated a CoOx @NiMoN/Ti3 C2 Tx electrode via in situ growth on Ni foam using hydrothermal treatment with post-nitrogenization. The effect of atomic layer deposition (ALD) of CoOx on the TMN/Ti3 C2 Tx interface and the consequent electrochemical charge storage mechanisms are investigated in detail. The proposed CoOx @NiMoN/Ti3 C2 Tx electrode delivers an impressive specific capacity in a 2 m potassium hydroxide (KOH) electrolyte and is then employed in both a hybrid solid-state supercapacitor (HSSC) with reduced graphene oxide and a symmetric SC in a 2 m KOH + polyvinyl alcohol (PVA) gel electrolyte. Outstanding charge storage and high capacity retention during cyclic testing are observed for both energy storage devices. The exceptional electrochemical performance of the fabricated electrode is a result of its high conductivity and high number of active sites. Here a feasible new strategy is demonstrated for the fabrication of stable energy storage devices with a high energy density using TMNs and MXenes.

3.
J Synchrotron Radiat ; 31(Pt 5): 1058-1066, 2024 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-39150680

RESUMO

Advances in physics have been significantly driven by state-of-the-art technology, and in photonics and X-ray science this calls for the ability to manipulate the characteristics of optical beams. Orbital angular momentum (OAM) beams hold substantial promise in various domains such as ultra-high-capacity optical communication, rotating body detection, optical tweezers, laser processing, super-resolution imaging etc. Hence, the advancement of OAM beam-generation technology and the enhancement of its technical proficiency and characterization capabilities are of paramount importance. These endeavours will not only facilitate the use of OAM beams in the aforementioned sectors but also extend the scope of applications in diverse fields related to OAM beams. At the FERMI Free-Electron Laser (Trieste, Italy), OAM beams are generated either by tailoring the emission process on the undulator side or, in most cases, by coupling a spiral zone plate (SZP) in tandem with the refocusing Kirkpatrick-Baez active optic system (KAOS). To provide a robust and reproducible workflow to users, a Hartmann wavefront sensor (WFS) is used for both optics tuning and beam characterization. KAOS is capable of delivering both tightly focused and broad spots, with independent control over vertical and horizontal magnification. This study explores a novel non-conventional `near collimation' operational mode aimed at generating beams with OAM that employs the use of a lithographically manufactured SZP to achieve this goal. The article evaluates the mirror's performance through Hartmann wavefront sensing, offers a discussion of data analysis methodologies, and provides a quantitative analysis of these results with ptychographic reconstructions.

4.
Br Med Bull ; 149(1): 60-71, 2024 Mar 13.
Artigo em Inglês | MEDLINE | ID: mdl-38282031

RESUMO

BACKGROUND: Parkinson's disease (PD) is the second most common neurodegenerative disorder and is clinically characterized by the presence of motor (bradykinesia, rigidity, rest tremor and postural instability) and non-motor symptoms (cognitive impairment, autonomic dysfunction, sleep disorders, depression and hyposmia). The aetiology of PD is unknown except for a small but significant contribution of monogenic forms. SOURCES OF DATA: No new data were generated or analyzed in support of this review. AREAS OF AGREEMENT: Up to 15% of PD patients carry pathogenic variants in PD-associated genes. Some of these genes are associated with mendelian inheritance, while others act as risk factors. Genetic background influences age of onset, disease course, prognosis and therapeutic response. AREAS OF CONTROVERSY: Genetic testing is not routinely offered in the clinical setting, but it may have relevant implications, especially in terms of prognosis, response to therapies and inclusion in clinical trials. Widely adopted clinical guidelines on genetic testing are still lacking and open to debate. Some new genetic associations are still awaiting confirmation, and selecting the appropriate genes to be included in diagnostic panels represents a difficult task. Finally, it is still under study whether (and to which degree) specific genetic forms may influence the outcome of PD therapies. GROWING POINTS: Polygenic Risk Scores (PRS) may represent a useful tool to genetically stratify the population in terms of disease risk, prognosis and therapeutic outcomes. AREAS TIMELY FOR DEVELOPING RESEARCH: The application of PRS and integrated multi-omics in PD promises to improve the personalized care of patients.


Assuntos
Doença de Parkinson , Humanos , Doença de Parkinson/genética , Doença de Parkinson/complicações , Doença de Parkinson/tratamento farmacológico , Tremor , Fatores de Risco
5.
Magn Reson Med ; 92(4): 1376-1391, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38899391

RESUMO

PURPOSE: We propose and evaluate multiphoton parallel transmission (MP-pTx) to mitigate flip angle inhomogeneities in high-field MRI. MP-pTx is an excitation method that utilizes a single, conventional birdcage coil supplemented with low-frequency (kHz) irradiation from a multichannel shim array and/or gradient channels. SAR analysis is simplified to that of a conventional birdcage coil, because only the radiofrequency (RF) field from the birdcage coil produces significant SAR. METHODS: MP-pTx employs an off-resonance RF pulse from a conventional birdcage coil supplemented with oscillating z $$ z $$ -directed fields from a multichannel shim array and/or the gradient coils. We simulate the ability of MP-pTx to create uniform nonselective brain excitations at 7 T using realistic B 1 + $$ {\mathrm{B}}_1^{+} $$ and Δ B 0 $$ \Delta {\mathrm{B}}_0 $$ field maps. The RF, shim array, and gradient waveform's amplitudes and phases are optimized using a genetic algorithm followed by sequential quadratic programming. RESULTS: A 1 ms MP-pTx excitation using a 32-channel shim array with current constrained to less than 50 Amp-turns reduced the transverse magnetization's normalized root-mean-squared error from 29% for a conventional birdcage excitation to 6.6% and was nearly 40% better than a 1 ms birdcage coil 5 kT-point excitation with optimized kT-point locations and comparable pulse power. CONCLUSION: The MP-pTx method resembles conventional pTx in its goals and approach but replaces the parallel RF channels with cheaper, low-frequency shim channels. The method mitigates high-field flip angle inhomogeneities to a level better than 3 T CP-mode and comparable to 7 T pTx while retaining the straightforward SAR characteristics of conventional birdcage excitations, as low-frequency shim array fields produce negligible SAR.


Assuntos
Algoritmos , Encéfalo , Imageamento por Ressonância Magnética , Imageamento por Ressonância Magnética/instrumentação , Imageamento por Ressonância Magnética/métodos , Humanos , Encéfalo/diagnóstico por imagem , Reprodutibilidade dos Testes , Imagens de Fantasmas , Simulação por Computador , Fótons , Aumento da Imagem/métodos , Processamento de Sinais Assistido por Computador , Interpretação de Imagem Assistida por Computador/métodos
6.
Ann Behav Med ; 58(5): 314-327, 2024 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-38470961

RESUMO

BACKGROUND: Up to 50% of people scheduled for screening colonoscopy do not complete this test and no studies have focused on minority and low-income populations. Interventions are needed to improve colorectal cancer (CRC) screening knowledge, reduce barriers, and provide alternative screening options. Patient navigation (PN) and tailored interventions increase CRC screening uptake, however there is limited information comparing their effectiveness or the effect of combining them. PURPOSE: Compare the effectiveness of two interventions to increase CRC screening among minority and low-income individuals who did not attend their screening colonoscopy appointment-a mailed tailored digital video disc (DVD) alone versus the mailed DVD plus telephone-based PN compared to usual care. METHODS: Patients (n = 371) aged 45-75 years at average risk for CRC who did not attend a screening colonoscopy appointment were enrolled and were randomized to: (i) a mailed tailored DVD; (ii) the mailed DVD plus phone-based PN; or (iii) usual care. CRC screening outcomes were from electronic medical records at 12 months. Multivariable logistic regression analyses were used to study intervention effects. RESULTS: Participants randomized to tailored DVD plus PN were four times more likely to complete CRC screening compared to usual care and almost two and a half times more likely than those who were sent the DVD alone. CONCLUSIONS: Combining telephone-based PN with a mailed, tailored DVD increased CRC screening among low-income and minority patients who did not attend their screening colonoscopy appointments and has potential for wide dissemination.


Up to half of people scheduled for a screening colonoscopy do not complete this test. There is a need for interventions to improve knowledge about colorectal cancer (CRC) screening, enhance access to screening by offering alternative test options, foster skills for completing screening, and mitigate barriers. The purpose of this study was to compare the effects of two interventions aimed at increasing CRC screening­a mailed tailored digital video disc (DVD) alone versus the mailed DVD plus telephone-based patient navigation (PN)­for patients who had not completed a scheduled screening colonoscopy. We enrolled 371 patients aged 45­75 years who had no CRC risk factors other than age, who were scheduled for a screening colonoscopy but did not attend their appointment. Participants were randomized to receive either: (i) a mailed tailored DVD; (ii) the mailed DVD plus phone-based PN; or (iii) usual care. Those who received the tailored DVD plus PN were four times more likely to complete CRC screening with stool test or colonoscopy compared to usual care. Combining telephone-based PN with a mailed, tailored DVD increased CRC screening among low-income and minority patients who did not attend a scheduled screening colonoscopy appointment.


Assuntos
Neoplasias Colorretais , Navegação de Pacientes , Humanos , Detecção Precoce de Câncer , Neoplasias Colorretais/diagnóstico , Colonoscopia , Programas de Rastreamento , Pobreza
7.
Br J Clin Pharmacol ; 90(5): 1344-1356, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38403776

RESUMO

AIM: Suboptimal self-management with controller inhalation therapy in asthma and COPD is frequently observed with poor treatment outcomes. The developed 'Respiratory Adherence Care Enhancer' (RACE) instrument identifies and addresses individual barriers to self-management with a theoretical underpinning. This study investigates the feasibility of pharmaceutical support with this instrument. METHODS: An implementation trial was conducted with asthma and COPD patients in 5 community pharmacies in the Netherlands. Patients were allocated to standard care or add-on support with the RACE instrument. Patients were invited to complete the RACE questionnaire at baseline, 5-week and 10-week follow-up. Barrier profiles were accessible for the intervention group with subsequent consultations at baseline and 5-weeks. Experiences were collected from patients and consultants with a questionnaire and reported findings. Primary endpoints focused on the acceptability, practicality and implementation process. Secondary endpoints included between-group differences in barrier and disease control outcomes from baseline at 10-weeks follow-up. RESULTS: In total, 84 patients were included; 48 were assigned to intervention and 36 to standard care. Patient satisfaction of support with the RACE instrument was high (71%). Patients felt motivated, reassured and more confident about their disease management. Consultants reported an increase in awareness of patient barriers. Patient recognition of barrier profiles was 83.9% (±12.9%). The barrier inhaler techniques decreased significantly for the intervention group at follow-up with odds ratio 0.30 (95% confidence interval, 0.10-0.91). No significant differences were observed for changes in number of barriers and disease control. CONCLUSION: Self-management support with the RACE instrument is feasible and appreciated, facilitating behaviour change with patient-centred pharmaceutical care in asthma and COPD.


Assuntos
Asma , Adesão à Medicação , Doença Pulmonar Obstrutiva Crônica , Autogestão , Humanos , Doença Pulmonar Obstrutiva Crônica/terapia , Doença Pulmonar Obstrutiva Crônica/tratamento farmacológico , Asma/tratamento farmacológico , Asma/terapia , Masculino , Feminino , Pessoa de Meia-Idade , Países Baixos , Idoso , Autogestão/métodos , Adesão à Medicação/estatística & dados numéricos , Inquéritos e Questionários , Administração por Inalação , Adulto , Satisfação do Paciente , Estudos de Viabilidade , Antiasmáticos/administração & dosagem , Antiasmáticos/uso terapêutico
8.
Helicobacter ; 29(2): e13076, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38680067

RESUMO

BACKGROUND: The systematic use of susceptibility testing and tailored first-line treatment for Helicobacter pylori eradication has yet to be established. AIM: To compare 14-day tailored PCR-guided triple therapy to 14-day non-Bismuth concomitant quadruple therapy for first-line Helicobacter pylori eradication. PATIENTS AND METHODS: We performed a multicenter, parallel-group, randomized noninferiority controlled trial. Naive adult patients with Helicobacter pylori infection were treated with 14-day tailored PCR-guided triple therapy (esomeprazole 40 mg and amoxicillin 1000 mg b.d. plus clarithromycin 500 mg or levofloxacin 500 mg b.d. according to clarithromycin susceptibility) or 14-day non-Bismuth concomitant quadruple therapy (esomeprazole 40 mg, amoxicillin 1000 mg, clarithromycin 500 mg, and metronidazole 500 mg b.d.). The primary endpoint was H. pylori eradication. RESULTS: We screened 991 patients for eligibility and randomized 241 patients. The first-line eradication rate was 99.2% in the tailored PCR-guided group and 95.9% in the control group (ITT population; absolute difference of +3.30%, with a lower bound of CI at -0.68%). Both first-line therapies were well tolerated, with a formally significant difference in favor of the tailored PCR-guided group (61.4% vs. 41.2%, p = 0.003). Economic analyses revealed a lower cost of the tailored PCR-guided arm, with a 92% chance of being jointly more effective and less expensive than the control arm in the ITT population. CONCLUSION: In a country with a high level of clarithromycin resistance, the results of our study demonstrated the noninferiority of 14-day tailored PCR-guided triple therapy as a first-line H. pylori eradication therapy compared to 14-day non-Bismuth quadruple therapy (ClinicalTrials.gov NCT02576236).


Assuntos
Antibacterianos , Claritromicina , Quimioterapia Combinada , Infecções por Helicobacter , Helicobacter pylori , Humanos , Infecções por Helicobacter/tratamento farmacológico , Infecções por Helicobacter/microbiologia , Masculino , Feminino , Pessoa de Meia-Idade , Helicobacter pylori/efeitos dos fármacos , Antibacterianos/uso terapêutico , Antibacterianos/administração & dosagem , Adulto , Claritromicina/uso terapêutico , Claritromicina/administração & dosagem , Reação em Cadeia da Polimerase/métodos , Amoxicilina/uso terapêutico , Amoxicilina/administração & dosagem , Idoso , Resultado do Tratamento , Metronidazol/uso terapêutico , Metronidazol/administração & dosagem , Levofloxacino/uso terapêutico , Levofloxacino/administração & dosagem , Adulto Jovem
9.
Helicobacter ; 29(4): e13126, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39143948

RESUMO

BACKGROUND: The optimal duration of regimens for tailored therapy based on genotypic resistance for clarithromycin has yet to be established. AIM: This study was a nationwide, multicenter, randomized trial comparing empirical therapy with tailored therapy based on genotypic resistance for first-line eradication of Helicobacter pylori. We also compared the eradication rates of 7- and 14-day regimens for each group. PATIENTS AND METHODS: Patients with H. pylori infection were first randomized to receive empirical or tailored therapy. Patients in each group were further randomized into 7- or 14-day regimens. Empirical therapy consisted of a triple therapy (TT) regimen (twice-daily doses of pantoprazole 40 mg, amoxicillin 1 g, and clarithromycin 500 mg) for 7 or 14 days. Tailored therapy consisted of TT of 7 or 14 days in patients without genotypic resistance. Patients with genotypic resistance were treated with bismuth quadruple therapy (BQT) regimens (twice-daily doses of pantoprazole 40 mg, three daily doses of metronidazole 500 mg, and four times daily doses of bismuth 300 mg and tetracycline 500 mg) for 7 or 14 days. A 13C-urea breath test assessed eradication rates. The primary outcome was eradication rates of each group. RESULTS: A total of 593 patients were included in the study. The eradication rates were 65.7% (201/306) in the empirical therapy group and 81.9% (235/287) in the tailored therapy group for intention-to-treat analysis (p < 0.001). In the per-protocol analysis, the eradication rates of the empirical therapy and tailored groups were 70.3% (201/286) and 85.5% (235/274) (p < 0.001), respectively. There was no difference in compliance between the two groups. The rate of adverse events was higher in the tailored group compared to the empirical group (p < 0.001). DISCUSSION: Our study confirmed that tailored therapy based on genotypic resistance was more effective than empirical therapy for H. pylori eradication in Korea. However, no significant difference was found between 7- and 14-day regimens for each group. Future studies are needed to determine the optimal duration of therapy for empirical and tailored therapy regimens.


Assuntos
Antibacterianos , Quimioterapia Combinada , Infecções por Helicobacter , Helicobacter pylori , Humanos , Infecções por Helicobacter/tratamento farmacológico , Infecções por Helicobacter/microbiologia , Helicobacter pylori/efeitos dos fármacos , Helicobacter pylori/genética , Masculino , Feminino , Pessoa de Meia-Idade , Antibacterianos/uso terapêutico , Antibacterianos/administração & dosagem , República da Coreia , Adulto , Idoso , Resultado do Tratamento , Farmacorresistência Bacteriana , Amoxicilina/uso terapêutico , Amoxicilina/administração & dosagem , Claritromicina/uso terapêutico , Metronidazol/uso terapêutico , Pantoprazol/uso terapêutico , Genótipo , Adulto Jovem
10.
Prev Med ; 181: 107897, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38378124

RESUMO

BACKGROUND: Risk-tailored screening has emerged as a promising approach to optimise the balance of benefits and harms of existing population cancer screening programs. It tailors screening (e.g., eligibility, frequency, interval, test type) to individual risk rather than the current one-size-fits-all approach of most organised population screening programs. However, the implementation of risk-tailored cancer screening in the population is challenging as it requires a change of practice at multiple levels i.e., individual, provider, health system levels. This scoping review aims to synthesise current implementation considerations for risk-tailored cancer screening in the population, identifying barriers, facilitators, and associated implementation outcomes. METHODS: Relevant studies were identified via database searches up to February 2023. Results were synthesised using Tierney et al. (2020) guidance for evidence synthesis of implementation outcomes and a multilevel framework. RESULTS: Of 4138 titles identified, 74 studies met the inclusion criteria. Most studies in this review focused on the implementation outcomes of acceptability, feasibility, and appropriateness, reflecting the pre-implementation stage of most research to date. Only six studies included an implementation framework. The review identified consistent evidence that risk-tailored screening is largely acceptable across population groups, however reluctance to accept a reduction in screening frequency for low-risk informed by cultural norms, presents a major barrier. Limited studies were identified for cancer types other than breast cancer. CONCLUSIONS: Implementation strategies will need to address alternate models of delivery, education of health professionals, communication with the public, screening options for people at low risk of cancer, and inequity in outcomes across cancer types.


Assuntos
Neoplasias da Mama , Detecção Precoce de Câncer , Humanos , Feminino , Pessoal de Saúde , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/prevenção & controle
11.
Curr Oncol Rep ; 26(4): 346-358, 2024 04.
Artigo em Inglês | MEDLINE | ID: mdl-38400984

RESUMO

BACKGROUND: Breast cancer (BC) treatment has recently been revolutionized by the introduction of newer targeted agents, that helped tailoring therapies around the single patient. Along with increased survival rates, a careful evaluation of diet, lifestyle habits, physical activity, emotional and psychological experiences linked to the treatment journey, is now mandatory. However, a true proposal for an omnicomprehensive and "integrative" approach is still lacking in literature. METHODS: A scientific board of internationally recognized specialists throughout different disciplines designed a shared proposal of holistic approach for BC patients. RESULTS: A narrative review, containing information on BC treatment, endocrinological and diet aspects, physical activity, rehabilitation, integrative medicine, and digital narrative medicine, was developed. CONCLUSIONS: In the context of a patient-centered care, BC treatment cannot be separated from a patient's long-term follow-up and care, and an organized interdisciplinary collaboration is the future in this disease's cure, to make sure that our patients will live longer and better. TRIAL REGISTRATION: NCT05893368: New Model for Integrating Person-based Care (PbC) in the Treatment of Advanced HER2-negative Breast Cancer (PERGIQUAL). Registration date: 29th May 2023.


Assuntos
Neoplasias da Mama , Prestação Integrada de Cuidados de Saúde , Medicina Integrativa , Humanos , Feminino , Neoplasias da Mama/terapia , Estilo de Vida , Dieta
12.
Support Care Cancer ; 32(7): 428, 2024 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-38869623

RESUMO

PURPOSE: The purpose of this study was to assess participants' perceptions and experiences while participating in a Food is Medicine medically tailored meal plus intensive nutrition counseling intervention to create a theoretical explanation about how the intervention worked. METHODS: This interpretive qualitative study included the use of semi-structured interviews with active participants in a randomized controlled trial aimed at understanding how a medically tailored meal plus nutrition counseling intervention worked for vulnerable individuals with lung cancer treated at four cancer centers across the USA. During the 8-month long study, participants in the intervention arm were asked to be interviewed, which were recorded, transcribed verbatim, and analyzed using conventional content analysis with principles of grounded theory. RESULTS: Twenty individuals participated. Data analysis resulted in a theoretical explanation of the intervention's mechanism of action. The explanatory process includes three linked and propositional categories leading to patient resilience: engaging in treatment, adjusting to diagnosis, and active coping. The medically tailored meals plus nutrition counseling engaged participants throughout treatment, which helped participants adjust to their diagnosis, leading to active coping through intentional self-care, behavior change, and improved quality of life. CONCLUSIONS: These findings provide evidence that a Food is Medicine intervention may buffer some of the adversity related to the diagnosis of lung cancer and create a pathway for participants to experience post-traumatic growth, develop resilience, and change behaviors to actively cope with lung cancer. Medically tailored meals plus intensive nutrition counseling informed by motivational interviewing supported individuals' adjustment to their diagnosis and resulted in perceived positive behavior change.


Assuntos
Adaptação Psicológica , Aconselhamento , Neoplasias Pulmonares , Pesquisa Qualitativa , Humanos , Neoplasias Pulmonares/psicologia , Neoplasias Pulmonares/terapia , Masculino , Feminino , Pessoa de Meia-Idade , Aconselhamento/métodos , Idoso , Qualidade de Vida , Refeições/psicologia , Autocuidado/métodos , Autocuidado/psicologia
13.
Appl Microbiol Biotechnol ; 108(1): 227, 2024 Feb 21.
Artigo em Inglês | MEDLINE | ID: mdl-38381223

RESUMO

The extracellular heteropolysaccharide xanthan, synthesized by bacteria of the genus Xanthomonas, is widely used as a thickening and stabilizing agent across the food, cosmetic, and pharmaceutical sectors. Expanding the scope of its application, current efforts target the use of xanthan to develop innovative functional materials and products, such as edible films, eco-friendly oil surfactants, and biocompatible composites for tissue engineering. Xanthan-derived oligosaccharides are useful as nutritional supplements and plant defense elicitors. Development and processing of such new functional materials and products often necessitate tuning of xanthan properties through targeted structural modification. This task can be effectively carried out with the help of xanthan-specific enzymes. However, the complex molecular structure and intricate conformational behavior of xanthan create problems with its enzymatic hydrolysis or modification. This review summarizes and analyzes data concerning xanthan-degrading enzymes originating from microorganisms and microbial consortia, with a particular focus on the dependence of enzymatic activity on the structure and conformation of xanthan. Through a comparative study of xanthan-degrading pathways found within various bacterial classes, different microbial enzyme systems for xanthan utilization have been identified. The characterization of these new enzymes opens new perspectives for modifying xanthan structure and developing innovative xanthan-based applications. KEY POINTS: • The structure and conformation of xanthan affect enzymatic degradation. • Microorganisms use diverse multienzyme systems for xanthan degradation. • Xanthan-specific enzymes can be used to develop xanthan variants for novel applications.


Assuntos
Suplementos Nutricionais , Consórcios Microbianos , Polissacarídeos Bacterianos , Hidrólise , Mutagênese Sítio-Dirigida
14.
BMC Psychiatry ; 24(1): 203, 2024 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-38475768

RESUMO

BACKGROUND: The access to and uptake of evidence-based behavioral parent training for children with behavioral difficulties (i.e., oppositional, defiant, aggressive, hyperactive, impulsive, and inattentive behavior) are currently limited because of a scarcity of certified therapists and long waiting lists. These problems are in part due to the long and sometimes perceived as rigid nature of most evidence-based programs and result in few families starting behavioral parent training and high dropout rates. Brief and individually tailored parenting interventions may reduce these problems and make behavioral parent training more accessible. This protocol paper describes a two-arm, multi-center, randomized controlled trial on the short- and longer-term effectiveness and cost-effectiveness of a brief, individually tailored behavioral parent training program for children with behavioral difficulties. METHODS: Parents of children aged 2-12 years referred to a child mental healthcare center are randomized to (i) three sessions of behavioral parent training with optional booster sessions or (ii) care as usual. To evaluate effectiveness, our primary outcome is the mean severity of five daily ratings by parents of four selected behavioral difficulties. Secondary outcomes include measures of parent and child behavior, well-being, and parent-child interaction. We explore whether child and parent characteristics moderate intervention effects. To evaluate cost-effectiveness, the use and costs of mental healthcare and utilities are measured. Finally, parents' and therapists' satisfaction with the brief program are explored. Measurements take place at baseline (T0), one week after the brief parent training, or eight weeks after baseline (in case of care as usual) (T1), and six months (T2) and twelve months (T3) after T1. DISCUSSION: The results of this trial could have meaningful societal implications for children with behavioral difficulties and their parents. If we find the brief behavioral parent training to be more (cost-)effective than care as usual, it could be used in clinical practice to make parent training more accessible. TRIAL REGISTRATION: The trial is prospectively registered at ClinicalTrials.gov (NCT05591820) on October 24th, 2022 and updated throughout the trial.


Assuntos
Transtornos Mentais , Pais , Criança , Humanos , Comportamento Infantil , Estudos Multicêntricos como Assunto , Relações Pais-Filho , Poder Familiar , Pais/educação , Ensaios Clínicos Controlados Aleatórios como Assunto , Pré-Escolar
15.
Compr Psychiatry ; 129: 152447, 2024 02.
Artigo em Inglês | MEDLINE | ID: mdl-38134553

RESUMO

BACKGROUND: Personalization is considered an important principle in virtual reality (VR) exposure therapy. We aimed to identify whether personalized VR exposure could provoke increased anxiety in patients with panic disorder and agoraphobia as it is considered the first step in successful treatment for anxiety. METHODS: We performed a double-arm, one-day preliminary study among 28 patients with panic disorder and agoraphobia. Three sessions of VR exposure, including a theater, train, and elevator scenario, were conducted in two groups. In the personalized group (n = 14), the brightness and crowd density were customized based on a pre-assessment. In the control group (n = 14), these conditions were fully randomized. Self-reported anxiety, heart rate, skin conductance, and electroencephalography were measured before, during, and after the VR sessions. RESULTS: In the later VR sessions, higher self-reported anxiety levels measured by the Visual Analogue Scale were observed in the personalized exposure group. Increased heart rates during and after the VR sessions were observed in the personalized group. The changes in skin conductance peaks were not significantly different between the groups, but the increase in skin conductance was associated with the participants' perception of presence. The electroencephalogram showed widespread increases in alpha waves in the frontal and temporal areas of the brain in the personalized group than in the control group. CONCLUSION: Personalized VR exposure elicits stronger anxiogenic effects in patients with panic disorder and agoraphobia as suggested by self-report and neurophysiological data. Personalization of VR exposure has the potential for effective behavioral therapy.


Assuntos
Transtorno de Pânico , Realidade Virtual , Humanos , Transtorno de Pânico/diagnóstico , Transtorno de Pânico/terapia , Agorafobia/diagnóstico , Agorafobia/terapia , Ansiedade/terapia , Transtornos de Ansiedade
16.
J Endocrinol Invest ; 2024 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-38683498

RESUMO

PURPOSE: To evaluate the variables influencing the therapeutic choice toward oral versus subcutaneous semaglutide in a cohort of diabetic subjects. METHODS: We retrospectively collected data of 292 patients followed at the Diabetes Unit of the University Hospital of Siena and the Hospital of Grosseto, who were prescribed oral (n = 115) or subcutaneous (n = 177) semaglutide between October 2021 and October 2022. RESULTS: Oral semaglutide was preferentially prescribed in older subjects with longer disease duration in replacement of other antidiabetic drugs, while subcutaneous semaglutide was preferentially prescribed in add-on to metformin in subjects with higher body weight and BMI. After 6 months, both formulations significantly improved glycemic control and body weight, however injectable semaglutide showed a greater efficacy on A1c levels, weight loss, BMI and waist circumference reduction. No differences were found in terms of adverse events. CONCLUSION: In our experience, injectable semaglutide is preferred in patients with excess weight and shorter disease duration, while the oral formulation was used later and especially after therapeutic failure of previous therapies. Follow-up data indicate similar tolerability and efficacy of both formulations, despite subcutaneous semaglutide demonstrated greater efficacy.

17.
Childs Nerv Syst ; 40(3): 839-854, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38010434

RESUMO

OBJECTIVES: The utility of intraoperative electrocorticography (ECoG)-guided resective surgery for pediatric long-term epilepsy-associated tumors (LEATs) with antiseizure medication (ASM) resistant epilepsy is not supported by robust evidence. As epilepsy networks and their ramifications are different in children from those in adults, the impact of intraoperative ECoG-based tailored resections in predicting prognosis and influencing outcomes may also differ. We evaluated this hypothesis by comparing the outcomes of resections with and without the use of ECoG in children and adults by a randomized study. METHODS: From June 2020 to January 2022, 42 patients (17 children and 25 adults) with LEATs and antiseizure medication (ASM)-resistant epilepsy were randomly assigned to one of the 2 groups (ECoG or no ECoG), prior to surgical resection. The 'no ECoG' arm underwent gross total lesion resection (GTR) without ECoG guidance and the ECoG arm underwent GTR with ECoG guidance and further additional tailored resections, as necessary. Factors evaluated were tumor location, size, lateralization, seizure duration, preoperative antiepileptic drug therapy, pre- and postresection ECoG patterns and tumor histology. Postoperative Engel score and adverse event rates were compared in the pediatric and adult groups of both arms. Eloquent cortex lesions and re-explorations were excluded to avoid confounders. RESULTS: Forty-two patients were included in the study of which 17 patients were in the pediatric cohort (age < 18 years) and 25 in the adult cohort. The mean age in the pediatric group was 11.11 years (SD 4.72) and in the adult group was 29.56 years (SD 9.29). The mean duration of epilepsy was 9.7 years (SD 4.8) in the pediatric group and 10.96 (SD 8.8) in the adult group. The ECoG arm of LEAT resections had 23 patients (9 children and 14 adults) and the non-ECoG arm had 19 patients (8 children and 11 adults). Three children and 3 adults from the ECoG group further underwent ECoG-guided tailored resections (average 1.33 additional tailored resections/per patient.).The histology of the tailored resection specimen was unremarkable in 3/6 (50%).Overall, the commonest histology in both groups was ganglioglioma and the temporal lobe, the commonest site of the lesion. 88.23% of pediatric cases (n = 15/17) had an excellent outcome (Engel Ia) following resection, compared to 84% of adult cases (n = 21/25) at a mean duration of follow-up of 25.76 months in children and 26.72 months in adults (p = 0.405).There was no significant difference in seizure outcomes between the ECoG and no ECoG groups both in children and adults, respectively (p > 0.05). Additional tailored resection did not offer any seizure outcome benefit when compared to the non-tailored resections. CONCLUSIONS: The use of intraoperative electrocorticography in LEATs did not contribute to postoperative seizure outcome benefit in children and adults. No additional advantage or utility was offered by ECoG in children when compared to its use in adults. ECoG-guided additional tailored resections did not offer any additional seizure outcome benefit both in children and adults.


Assuntos
Neoplasias Encefálicas , Epilepsia Resistente a Medicamentos , Epilepsia , Ganglioglioma , Adulto , Humanos , Criança , Adolescente , Eletrocorticografia , Estudos Retrospectivos , Epilepsia/etiologia , Epilepsia/cirurgia , Convulsões/cirurgia , Epilepsia Resistente a Medicamentos/cirurgia , Neoplasias Encefálicas/complicações , Neoplasias Encefálicas/cirurgia , Neoplasias Encefálicas/patologia
18.
Acta Neurochir (Wien) ; 166(1): 352, 2024 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-39192063

RESUMO

BACKGROUND: Type 1 Spinal dural arteriovenous fistula (dAVF) is a rare but curable vascular cause of myelopathy. Microneurosurgery is a very efficacious modality in treating them. METHOD: A 26 year old gentleman with progressive flaccid paraparesis (LMN type) and urinary incontinence underwent surgery using exoscope for a right side T9-10 dAVF. A dilated vein was seen accompanying the exiting nerve root intraoperatively, consistent with the preoperative angiographic findings. The vein was ligated and divided leading to restitution of spinal cord vasculature on table and excellent postoperative outcome. CONCLUSION: Surgical resection is a straightforward and highly effective treatment in spinal dAVF.


Assuntos
Malformações Vasculares do Sistema Nervoso Central , Microcirurgia , Humanos , Malformações Vasculares do Sistema Nervoso Central/cirurgia , Malformações Vasculares do Sistema Nervoso Central/diagnóstico por imagem , Masculino , Adulto , Microcirurgia/métodos , Ligadura/métodos , Medula Espinal/cirurgia , Medula Espinal/irrigação sanguínea , Medula Espinal/diagnóstico por imagem , Resultado do Tratamento , Procedimentos Neurocirúrgicos/métodos
19.
J Ren Nutr ; 34(1): 40-46, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37640277

RESUMO

OBJECTIVE: Hemodialysis patients face one of the most difficult diets among clinical patient populations. Furthermore, dialysis dietary adherence is generally reported as low with providers generally lacking the time and resources to implement effective behavior change. The purpose of this study was to elucidate measures of patient and provider engagement with home-delivered medically tailored meals (MTMs). METHODS: We surveyed patients and staff at dialysis centers within the Denver metropolitan area. Surveys focused on 1) patient dietary intake, 2) awareness, support, and utilization of meal programs, and 3) nutritional challenges and barriers (including food security). RESULTS: We surveyed 118 patients (mean age 61.0 ± 14.2 year, 58.5% male, and dialysis vintage of 4.6 ± 4.9 years) and 26 staff across the included dialysis facilities. Patients were 20.3% White/Non-Hispanic, 35.6% Hispanic/Latin, and 31.4% Black/African American. Most patients reported eating 2 meals per day (N = 53, 44.9%) and 52.2% reported difficulty with following a kidney diet. The most cited reasons for not following the diet were behavioral or knowledge (38.5%), taste (26.3%), time/convenience (26.9%) and food autonomy (16.9%). Sixty participants (52.2%) reported living in a food desert and 26.3% reported food insecurity. Seventy-one patients (61.2%) were aware of MTMs but only 40.5% had been referred. Most (76.9%) dialysis providers were aware of MTMs but only 15 (57.7%) had actually referred patients to such a service. Black individuals were less likely to be referred for MTMs than White or Hispanics/Latin (29.7% vs 48.1% White and 45.0% Hispanic/Latin) individuals. CONCLUSION: Medically tailored meals (MTMs) represent a potential method to alleviate or bypass some of the many barriers expressed by patients. Our findings reveal a critical need for education around MTMs for both patients and providers. Medically tailored meals (MTMs) could potentially demonstrate health kidney dietary patterns that might translate to altered dietary preferences or toward future behavior change.


Assuntos
Dieta , Ingestão de Alimentos , Humanos , Masculino , Pessoa de Meia-Idade , Idoso , Feminino , Diálise Renal , Inquéritos e Questionários , Refeições
20.
J Med Internet Res ; 26: e49309, 2024 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-38901021

RESUMO

BACKGROUND: Interest in the application of predictive risk models (PRMs) in health care to identify people most likely to experience disease and treatment-related complications is increasing. In cancer care, these techniques are focused primarily on the prediction of survival or life-threatening toxicities (eg, febrile neutropenia). Fewer studies focus on the use of PRMs for symptoms or supportive care needs. The application of PRMs to chemotherapy-related symptoms (CRS) would enable earlier identification and initiation of prompt, personalized, and tailored interventions. While some PRMs exist for CRS, few were translated into clinical practice, and human factors associated with their use were not reported. OBJECTIVE: We aim to explore patients' and clinicians' perspectives of the utility and real-world application of PRMs to improve the management of CRS. METHODS: Focus groups (N=10) and interviews (N=5) were conducted with patients (N=28) and clinicians (N=26) across 5 European countries. Interactions were audio-recorded, transcribed verbatim, and analyzed thematically. RESULTS: Both clinicians and patients recognized the value of having individualized risk predictions for CRS and appreciated how this type of information would facilitate the provision of tailored preventative treatments or supportive care interactions. However, cautious and skeptical attitudes toward the use of PRMs in clinical care were noted by both groups, particularly in relationship to the uncertainty regarding how the information would be generated. Visualization and presentation of PRM information in a usable and useful format for both patients and clinicians was identified as a challenge to their successful implementation in clinical care. CONCLUSIONS: Findings from this study provide information on clinicians' and patients' perspectives on the clinical use of PRMs for the management of CRS. These international perspectives are important because they provide insight into the risks and benefits of using PRMs to evaluate CRS. In addition, they highlight the need to find ways to more effectively present and use this information in clinical practice. Further research that explores the best ways to incorporate this type of information while maintaining the human side of care is warranted. TRIAL REGISTRATION: ClinicalTrials.gov NCT02356081; https://clinicaltrials.gov/study/NCT02356081.


Assuntos
Grupos Focais , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Antineoplásicos/efeitos adversos , Antineoplásicos/uso terapêutico , Adulto , Idoso , Neoplasias/tratamento farmacológico , Neoplasias/psicologia , Medição de Risco/métodos , Entrevistas como Assunto , Atitude do Pessoal de Saúde , Pesquisa Qualitativa , Percepção
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA