Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 183
Filtrar
2.
Artigo em Inglês | MEDLINE | ID: mdl-38446576

RESUMO

BACKGROUND: The Lisfranc joint is an intricate podiatric medical structure that when injured can prove difficult to treat. No consensus has been established on optimal surgical management for this injury. It is widely debated whether open reduction and internal fixation or primary arthrodesis provides better outcomes for patients. Although literature has been published on this subject, no generalized guidelines have been created. The goal of this study was to analyze high-level meta-analyses to draw conclusions about surgical interventions for Lisfranc joint injuries. METHODS: A literature review was conducted to analyze outcomes of meta-analyses from January 1, 2016, to August 31, 2021. Only high-level evidence that reported at least one of the following outcomes was included: American Orthopaedic Foot and Ankle Society scale score, visual analog scale score, total complication rate, hardware removal rate, revision surgery rate, and secondary procedure rate. RESULTS: Six articles met the inclusion and exclusion criteria and were then analyzed. For all of the outcome measures, primary arthrodesis was equal or superior to open reduction and internal fixation. CONCLUSIONS: We recommend primary arthrodesis over open reduction and internal fixation for adult Lisfranc injuries.


Assuntos
Fratura-Luxação , Fraturas Ósseas , Luxações Articulares , Adulto , Humanos , Artrodese , Fratura-Luxação/diagnóstico por imagem , Fratura-Luxação/cirurgia , Fraturas Ósseas/diagnóstico por imagem , Fraturas Ósseas/cirurgia , Redução Aberta , Metanálise como Assunto
3.
PLoS One ; 19(3): e0298425, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38551904

RESUMO

INTRODUCTION: Infection causes a vast burden of disease, with significant mortality, morbidity and costs to health-care systems. However, identifying the pathogen causative infection can be challenging, resulting in high use of broad-spectrum antibiotics, much of which may be inappropriate. Novel metagenomic methods have potential to rapidly identify pathogens, however their clinical utility for many infections is currently unclear. Outcome from infection is also impacted by the effectiveness of immune responses, which can be impaired by age, co-morbidity and the infection itself. The aims of this study are twofold: To compare diversity of organisms identified and time-to-result using metagenomic methods versus traditional culture -based techniques, to explore the potential clinical role of metagenomic approaches to pathogen identification in a range of infections.To characterise the ex vivo function of immune cells from patients with acute infection, exploring host and pathogen-specific factors which may affect immune function and overall outcomes. METHODS: This is a prospective observational study of patients with acute infection. Patients with symptoms suggestive of an acute infection will be recruited, and blood and bodily fluid relevant to the site of infection collected (for example, sputum and naso-oropharyngeal swabs for respiratory tract infections, or urine for a suspected urinary tract infection). Metagenomic analysis of samples will be compared to traditional microbiology, alongside the antimicrobials received. Blood and respiratory samples such as bronchoalveolar lavage will be used to isolate immune cells and interrogate immune cell function. Where possible, similar samples will be collected from matched participants without a suspected infection to determine the impact of infection on both microbiome and immune cell function.


Assuntos
Antibacterianos , Infecções Respiratórias , Humanos , Antibacterianos/uso terapêutico , Lavagem Broncoalveolar , Projetos de Pesquisa , Infecções Respiratórias/diagnóstico , Metagenômica , Estudos Observacionais como Assunto
4.
J Foot Ankle Surg ; 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38494111

RESUMO

Tibiotalocalcaneal arthrodesis has been shown in literature to have good results in regards to low complication rates and deformity correction. While previous studies have investigated functional outcomes and complication rates, no large-scale studies have looked at pain outcomes. The present study performed a retrospective review of 154 extremities to analyze how a patient's comorbidities and characteristics influence pain outcomes following a tibiotalocalcaneal arthrodesis. The present study found an average change of pain from 7.1 to 3.0 in at least a 6 month follow up. We found that a diagnosis of chronic pain and tobacco use had statistically significant less pain improvement compared to patients without chronic pain or current tobacco use. We determined no statistically significant difference in pain outcomes for patients with or without Charcot deformity. Lastly, we found that with older patients there was more pain improvement observed. We physicians can educate current tobacco users of the improved pain outcomes with tobacco cessation prior to surgery. We recommend a multidisciplinary approach for pain in patients with a pre-operative diagnosis of chronic pain and to educate patients on realistic postoperative pain outcomes.

5.
Eur J Cancer ; 201: 113914, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38359495

RESUMO

BACKGROUND: CDC37 is a key determinant of client kinase recruitment to the HSP90 chaperoning system. We hypothesized that kinase-specific dependency on CDC37 alters the efficacy of targeted therapies for metastatic colorectal cancer (mCRC). MATERIAL AND METHODS: Two independent mCRC cohorts were analyzed to compare the survival outcomes between CDC37-high and CDC37-low patients (stratified by the median cutoff values): the CALGB/SWOG 80405 trial (226 and 207 patients receiving first-line bevacizumab- and cetuximab-containing chemotherapies, respectively) and Japanese retrospective (50 refractory patients receiving regorafenib) cohorts. A dataset of specimens submitted to a commercial CLIA-certified laboratory was utilized to characterize molecular profiles of CDC37-high (top quartile, N = 5055) and CDC37-low (bottom quartile, N = 5055) CRCs. RESULTS: In the bevacizumab-treated group, CDC37-high patients showed significantly better progression-free survival (PFS) (median 13.3 vs 9.6 months, hazard ratio [HR] 0.59, 95% confidence interval [CI] 0.44-0.79, p < 0.01) than CDC37-low patients. In the cetuximab-treated group, CDC37-high and CDC37-low patients had similar outcomes. In the regorafenib-treated group, CDC37-high patients showed significantly better overall survival (median 11.3 vs 6.0 months, HR 0.24, 95% CI 0.11-0.54, p < 0.01) and PFS (median 3.5 vs 1.9 months, HR 0.51, 95% CI 0.28-0.94, p = 0.03). Comprehensive molecular profiling revealed that CDC37-high CRCs were associated with higher VEGFA, FLT1, and KDR expressions and activated hypoxia signature. CONCLUSIONS: CDC37-high mCRC patients derived more benefit from anti-VEGF therapies, including bevacizumab and regorafenib, but not from cetuximab. Molecular profiles suggested that such tumors were dependent on angiogenesis-relating pathways.


Assuntos
Neoplasias do Colo , Neoplasias Colorretais , Compostos de Fenilureia , Piridinas , Neoplasias Retais , Humanos , Protocolos de Quimioterapia Combinada Antineoplásica , Bevacizumab/uso terapêutico , Proteínas de Ciclo Celular/genética , Proteínas de Ciclo Celular/metabolismo , Cetuximab/uso terapêutico , Chaperoninas/genética , Chaperoninas/metabolismo , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/genética , Neoplasias Colorretais/patologia , Expressão Gênica , Chaperonas Moleculares , Estudos Retrospectivos
6.
Biomaterials ; 306: 122477, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38309054

RESUMO

Camptothesome is a sphingomyelin-conjugated camptothecin (SM-CSS-CPT) nanovesicle that fortified the therapeutic delivery of CPT in diverse cancer types. To mitigate the Camptothesome-induced IDO1 negative feedback mechanism, we had co-encapsulated, indoximod (IND, IDO1 inhibitor) into Camptothesome using doxorubicin-derived IND (DOX-IND). To maximize the therapeutic potential of DOX-IND/Camptothesome, herein, we first dissected the synergistic drug ratio (DOX-IND/SM-CSS-CPT) via systematical in vitro screening. DOX-IND/Camptothesome with optimal drug ratio synchronized in vivo drug delivery with significantly higher tumor uptake compared to free drugs. This optimum DOX-IND/Camptothesome outperformed the combination of Camptothesome, Doxil and IND or other IDO1 inhibitors (BMS-986205 or epacadostat) in treating mice bearing late-stage MC38 tumors, and combination with immune checkpoint blockade (ICB) enabled it to eradicate 60 % of large tumors. Further, this optimized co-delivery Camptothesome beat Folfox and Folfiri, two first-line combination chemotherapies for colorectal cancer in antitumor efficacy and exhibited no side effects as compared to the severe systemic toxicities associated with Folfox and Folfiri. Finally, we demonstrated that the synergistic DOX-IND/Camptothesome was superior to the combined use of Onivyde + Doxil + IND in curbing the advanced orthotopic CT26-Luc tumors and eliminated 40 % tumors with complete metastasis remission when cooperated with ICB, eliciting stronger anti-CRC immune responses and greater reversal of immunosuppression. These results corroborated that with precise optimal synergistic drug ratio, the therapeutic potential of DOX-IND/Camptothesome can be fully unleased, which warrants further clinical investigation to benefit the cancer patients.


Assuntos
Neoplasias Colorretais , Doxorrubicina/análogos & derivados , Sistemas de Liberação de Medicamentos , Humanos , Camundongos , Animais , Sistemas de Liberação de Medicamentos/métodos , Polietilenoglicóis , Neoplasias Colorretais/tratamento farmacológico , Linhagem Celular Tumoral
7.
J Am Chem Soc ; 146(7): 4351-4356, 2024 Feb 21.
Artigo em Inglês | MEDLINE | ID: mdl-38334376

RESUMO

Artificial ion transporters have been explored both as tools for studying fundamental ion transport processes and as potential therapeutics for cancer and channelopathies. Here we demonstrate that synthetic transporters may also be used to regulate the transport of catalytic metal ions across lipid membranes and thus control chemical reactivity inside lipid-bound compartments. We show that acyclic lipophilic pyridyltriazoles enable Pd(II) cations to be transported from the external aqueous phase across the lipid bilayer and into the interior of large unilamellar vesicles. In situ reduction generates Pd(0) species, which catalyze the generation of a fluorescent product. Photocaging the Pd(II) transporter allows for photoactivation of the transport process and hence photocontrol over the internal catalysis process. This work demonstrates that artificial transporters enable control over catalysis inside artificial cell-like systems, which could form the basis of biocompatible nanoreactors for applications such as drug synthesis and delivery or to mediate phototargeted catalyst delivery into cells.


Assuntos
Bicamadas Lipídicas , Elementos de Transição , Transporte de Íons , Transporte Biológico , Cátions , Catálise
8.
J Immunother Cancer ; 12(1)2024 01 11.
Artigo em Inglês | MEDLINE | ID: mdl-38212123

RESUMO

BACKGROUND: Treatment with immune checkpoint inhibitors (ICIs) targeting programmed death-1 (PD-1) can yield durable antitumor responses, yet not all patients respond to ICIs. Current approaches to select patients who may benefit from anti-PD-1 treatment are insufficient. 5-hydroxymethylation (5hmC) analysis of plasma-derived cell-free DNA (cfDNA) presents a novel non-invasive approach for identification of therapy response biomarkers which can tackle challenges associated with tumor biopsies such as tumor heterogeneity and serial sample collection. METHODS: 151 blood samples were collected from 31 patients with non-small cell lung cancer (NSCLC) before therapy started and at multiple time points while on therapy. Blood samples were processed to obtain plasma-derived cfDNA, followed by enrichment of 5hmC-containing cfDNA fragments through biotinylation via a two-step chemistry and binding to streptavidin coated beads. 5hmC-enriched cfDNA and whole genome libraries were prepared in parallel and sequenced to obtain whole hydroxymethylome and whole genome plasma profiles, respectively. RESULTS: Comparison of on-treatment time point to matched pretreatment samples from same patients revealed that anti-PD-1 treatment induced distinct changes in plasma cfDNA 5hmC profiles of responding patients, as judged by Response evaluation criteria in solid tumors, relative to non-responders. In responders, 5hmC accumulated over genes involved in immune activation such as inteferon (IFN)-γ and IFN-α response, inflammatory response and tumor necrosis factor (TNF)-α signaling, whereas in non-responders 5hmC increased over epithelial to mesenchymal transition genes. Molecular response to anti-PD-1 treatment, as measured by 5hmC changes in plasma cfDNA profiles were observed early on, starting with the first cycle of treatment. Comparison of pretreatment plasma samples revealed that anti-PD-1 treatment response and resistance associated genes can be captured by 5hmC profiling of plasma-derived cfDNA. Furthermore, 5hmC profiling of pretreatment plasma samples was able to distinguish responders from non-responders using T cell-inflamed gene expression profile, which was previously identified by tissue RNA analysis. CONCLUSIONS: These results demonstrate that 5hmC profiling can identify response and resistance associated biological pathways in plasma-derived cfDNA, offering a novel approach for non-invasive prediction and monitoring of immunotherapy response in NSCLC.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Ácidos Nucleicos Livres , Neoplasias Pulmonares , Humanos , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/genética , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/metabolismo , Transição Epitelial-Mesenquimal , Biologia
9.
J Racial Ethn Health Disparities ; 11(2): 730-738, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36892814

RESUMO

BACKGROUND: Medical researchers have historically utilized the variable of race uncritically, rarely defining race, rarely acknowledging it as a social construct, and often omitting information about how it was measured. In this study, we use the following definition of race: "a system of structuring opportunity and assigning value based on the social interpretation of how one looks." We examine the influence of racial misclassification, racial discrimination, and racial consciousness on the self-rated health of Native Hawaiian and Pacific Islanders (NHPI) living in the United States of America (USA). METHODS: Our analysis used online survey data from a subgroup of NHPI adults living in the USA (n = 252) who were oversampled as part of a larger study of US adults (N = 2022). Respondents were recruited between September 7, 2021 and October 3, 2021, from an online opt-in panel of individuals across the USA. Statistical analyses include weighted and unweighted descriptive statistics for the sample, as well as a weighted logistic regression for poor/fair self-rated health. RESULTS: Odds of poor/fair self-rated health were greater for women (OR = 2.72; 95% CI [1.19, 6.21]) and those who experienced racial misclassification (OR = 2.90; 95% CI [1.20, 7.05]). No other sociodemographic, healthcare, or race-related variables were significantly associated with self-rated health in the fully adjusted results. CONCLUSIONS: Findings suggest that racial misclassification may be an important correlate of self-rated health among NHPI adults in the US context.


Assuntos
Havaiano Nativo ou Outro Ilhéu do Pacífico , Racismo , Adulto , Feminino , Humanos , Estado de Consciência , Havaí , Inquéritos e Questionários , Estados Unidos
10.
J Foot Ankle Surg ; 63(2): 136-139, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37777151

RESUMO

Ankle arthrodesis and total ankle arthroplasty are both well-accepted surgical treatment options for end-stage ankle arthrosis. However, total ankle arthroplasty has gained popularity as the survivability of implants is improving. It is understood that there is loss of bone height following tibiotalocalcaneal arthrodesis, but to our knowledge, this has not been investigated in the setting of total ankle arthroplasty. A retrospective radiographic review was conducted over a 5-year period. We investigated all patients who underwent a tibiotalocalcaneal arthrodesis or total ankle arthroplasty for treatment of ankle arthritis by a single fellowship-trained orthopedic surgeon. The anterior and posterior height measurements were measured on preoperative and postoperative lateral radiographs. Differences between preoperative and postoperative heights were analyzed through a series of analyses of covariance. One hundred and thirty-three patients and 143 operative extremities were included: 71 operative extremities in the tibiotalocalcaneal arthrodesis group (mean age 55.5 ± 13.3 years, BMI 32.2 ± 7.9) and 72 in the total ankle arthroplasty group (mean age 65.4 ± 9.5 years, BMI 30.7 ± 6.4). Statistical analysis demonstrated a loss of height in the tibiotalocalcaneal arthrodesis group, and an increased anterior and posterior height in the total ankle arthroplasty group. However, when comparing the arthroplasty group and arthrodesis group only the anterior height measurement reached statistical significance when stratified by gender (p < .001). The potential change in height is an important factor to consider during surgical planning as a limb length discrepancy may result.


Assuntos
Artroplastia de Substituição do Tornozelo , Osteoartrite , Humanos , Adulto , Pessoa de Meia-Idade , Idoso , Tornozelo/cirurgia , Articulação do Tornozelo/diagnóstico por imagem , Articulação do Tornozelo/cirurgia , Estudos Retrospectivos , Artroplastia de Substituição do Tornozelo/efeitos adversos , Osteoartrite/diagnóstico por imagem , Osteoartrite/cirurgia , Artrodese , Resultado do Tratamento
11.
J Allergy Clin Immunol ; 153(1): 320-329.e8, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37678576

RESUMO

BACKGROUND: Electronic cigarette (e-cigarette) use continues to rise despite concerns of long-term effects, especially the risk of developing lung diseases such as chronic obstructive pulmonary disease. Neutrophils are central to the pathogenesis of chronic obstructive pulmonary disease, with changes in phenotype and function implicated in tissue damage. OBJECTIVE: We sought to measure the impact of direct exposure to nicotine-containing and nicotine-free e-cigarette vapor on human neutrophil function and phenotype. METHODS: Neutrophils were isolated from the whole blood of self-reported nonsmoking, nonvaping healthy volunteers. Neutrophils were exposed to 40 puffs of e-cigarette vapor generated from e-cigarette devices using flavorless e-cigarette liquids with and without nicotine before functions, deformability, and phenotype were assessed. RESULTS: Neutrophil surface marker expression was altered, with CD62L and CXCR2 expression significantly reduced in neutrophils treated with e-cigarette vapor containing nicotine. Neutrophil migration to IL-8, phagocytosis of Escherichia coli and Staphylococcus aureus pHrodo bioparticles, oxidative burst response, and phorbol 12-myristate 13-acetate-stimulated neutrophil extracellular trap formation were all significantly reduced by e-cigarette vapor treatments, independent of nicotine content. E-cigarette vapor induced increased levels of baseline polymerized filamentous actin levels in the cytoplasm, compared with untreated controls. CONCLUSIONS: The significant reduction in effector neutrophil functions after exposure to high-power e-cigarette devices, even in the absence of nicotine, is associated with excessive filamentous actin polymerization. This highlights the potentially damaging impact of vaping on respiratory health and reinforces the urgency of research to uncover the long-term health implications of e-cigarettes.


Assuntos
Vapor do Cigarro Eletrônico , Sistemas Eletrônicos de Liberação de Nicotina , Doença Pulmonar Obstrutiva Crônica , Humanos , Neutrófilos , Vapor do Cigarro Eletrônico/metabolismo , Vapor do Cigarro Eletrônico/farmacologia , Nicotina/efeitos adversos , Nicotina/metabolismo , Actinas/metabolismo , Doença Pulmonar Obstrutiva Crônica/metabolismo
12.
Gerontologist ; 64(4)2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-37638852

RESUMO

BACKGROUND AND OBJECTIVES: The RE-AIM (Reach, Effectiveness, Adoption, Implementation, and Maintenance) framework was used to describe the implementation of the Stopping Elderly Accidents, Deaths, and Injuries (STEADI) Initiative (2018-2021) for screening and assessing all older adults ≥65 years for falls risk across 34 outpatient rehabilitation clinics within a large health system. RESEARCH DESIGN AND METHODS: We described the Implementation process and strategies. Using Electronic Health Records (EHRs), we identified Reach, Adoption, and Maintenance of screenings and physical assessments to identify fall risk among older adults. RESULTS: STEADI Implementation strategies included health system mandates, EHR revisions, email instructions, educational sessions and resources, clinical leads and champions, and chart audits. Reach: 76.4% (50,023) had a completed screening, and 44.1% screened at risk for falls. Adoption: Clinic-level adoption varied, with most performing screenings. Profession-level adoption was highest for physical therapists (PTs; 94.2% initiated, 80.6% completed) and lowest for speech-language pathologists (SLPs; 79.8% initiated, 55.9% completed). Reach and Adoption of functional outcomes measures (FOM): PTs completed an FOM on 59.5% of at-risk patients, occupational therapists on 11.6%, and SLPs on 7.9%. Maintenance: All measures declined 1%-10% annually between 2018 and 2021. DISCUSSION AND IMPLICATIONS: STEADI screening and FOMs were implemented systemwide in 34 outpatient rehabilitation clinics, reaching over 50,000 older adults. Screening adoption rates varied by clinic. PTs had the highest adoption rate. All adoption rates declined over time. Future research should consider an implementation science approach with input from key partners before implementation to identify barriers and develop strategies to support STEADI in outpatient rehabilitation.


Assuntos
Avaliação de Resultados em Cuidados de Saúde , Pacientes Ambulatoriais , Humanos , Idoso
13.
J Clin Med ; 12(24)2023 Dec 13.
Artigo em Inglês | MEDLINE | ID: mdl-38137715

RESUMO

Bone metastases from gastroenteropancreatic neuroendocrine neoplasms (GEPNENs) have been associated with poor prognosis, but it is unclear whether patients with concurrent bone metastases who receive liver-directed therapy (LDT) would derive survival benefit. The California Cancer Registry dataset, merged with data from the California Office of Statewide Health Planning and Development, was used to perform a retrospective study of GEPNENs metastatic to both liver and bone between 2000 and 2012. A total of 203 patients were identified. Of these, 14.8% underwent LDT after bone metastasis diagnosis, 22.1% received LDT prior to that diagnosis, and 63.1% never received LDT. The median overall survival from the time of bone metastasis diagnosis was significantly longer in those that received LDT after diagnosis when compared with those that never received LDT (p = 0.005) and was not significantly different from the median overall survival of those that had received LDT prior to diagnosis (p = 0.256). LDT may still be associated with improved survival even after a diagnosis of bone metastasis.

14.
Infect Med (Beijing) ; 2(2): 89-95, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38013742

RESUMO

Background: Despite the United States (US) having an abundant supply of COVID-19 vaccines, vaccination rates lag behind other high-income countries, suggesting that vaccine hesitancy and attitudes play a greater role in public health measures than pure supply and access. With the acknowledgment that vaccination attitudes and status may or may not be correlated, this study examined COVID-19 vaccine hesitancy among vaccinated US adults by asking: 1) What is the prevalence of COVID-19 vaccine hesitancy among the vaccinated? 2) Does COVID-19 vaccine hesitancy vary across sociodemographic characteristics? 3) Does COVID-19 vaccine hesitancy vary by healthcare access and influenza vaccination over the past 5 years? Methods: Data were collected through an online survey of 2022 US adults with a final analytic sample of 1383 vaccinated respondents. Results: Overall, 48.8% of vaccinated adults reported some level of hesitancy, while a slight majority reported they were "not at all hesitant". Younger respondents, women, and Black and American Indian or Alaska Native participants had greater adjusted odds of being more hesitant towards receiving the COVID-19 vaccine. Respondents who had a primary care physician had greater adjusted odds than those who did not have a primary care physician of being more hesitant towards receiving the COVID-19 vaccine. Conclusions: This is the first population-based national sample study examining COVID-19 vaccine hesitancy among vaccinated individuals from subgroups of distinctive backgrounds in order to inform targeted strategies for reducing vaccine hesitancy. Findings can assist in efforts to increase vaccination rates and also decrease vaccine hesitancy at the national level.

15.
BMJ Open Respir Res ; 10(1)2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37827807

RESUMO

INTRODUCTION: Community-acquired pneumonia has high mortality and is associated with significant healthcare costs. In older adults with community-acquired pneumonia neutrophil dysfunction has been identified and is associated with poor outcomes for patients. Immunometabolism is a rapidly developing field which links immune cell function to metabolism. This study aims to explore neutrophil metabolism in community-acquired pneumonia. METHODS AND ANALYSIS: Pneumonia Metabolism in Ageing study is a prospective observational study recruiting older adults hospitalised with community-acquired pneumonia to examine neutrophil function and metabolic status. Controls will be older adults with no acute illness. The primary endpoint is neutrophil chemotaxis. ETHICS AND DISSEMINATION: The study has ethical approval from the Research Ethics Committee Wales, reference 19/WA/0299. This study involves participants who may lack the capacity to consent to research involvement, in this situation, personal or professional assent will be sought. The results from this study will be submitted for publication in peer-reviewed journals and disseminated at local and international conferences.


Assuntos
Infecções Comunitárias Adquiridas , Pneumonia , Sepse , Humanos , Idoso , Neutrófilos/metabolismo , Proteínas Reguladoras de Apoptose/metabolismo , Pneumonia/metabolismo , Estudos de Coortes , Envelhecimento , Estudos Observacionais como Assunto
16.
J Am Chem Soc ; 145(41): 22659-22670, 2023 10 18.
Artigo em Inglês | MEDLINE | ID: mdl-37812759

RESUMO

Lipid nanoparticles (LNPs) are becoming widely adopted as vectors for the delivery of therapeutic payloads but generally lack intrinsic tissue-homing properties. These extracellular vesicle (EV) mimetics can be targeted toward the liver, lung, or spleen via charge modification of their lipid headgroups. Homing to other tissues has only been achieved via covalent surface modification strategies using small-molecule ligands, peptides, or monoclonal antibodies─methods that are challenging to couple with large-scale manufacturing. Herein, we design a novel modular artificial membrane-binding protein (AMBP) platform for the modification of LNPs postformation. The system is composed of two protein modules that can be readily coupled using bioorthogonal chemistry to yield the AMBP. The first is a membrane anchor module comprising a supercharged green fluorescent protein (scGFP) electrostatically conjugated to a dynamic polymer surfactant corona. The second is a functional module containing a cardiac tissue fibronectin homing sequence from the bacterial adhesin CshA. We demonstrate that LNPs modified using the AMBP exhibit a 20-fold increase in uptake by fibronectin-rich C2C12 cells under static conditions and a 10-fold increase under physiologically relevant shear stresses, with no loss of cell viability. Moreover, we show targeted localization of the AMBP-modified LNPs in zebrafish hearts, highlighting their therapeutic potential as a vector for the treatment of cardiac disease and, more generally, as a smart vector.


Assuntos
Fibronectinas , Nanopartículas , Animais , Peixe-Zebra , Lipossomos , Nanopartículas/química , RNA Interferente Pequeno/química
17.
Nat Commun ; 14(1): 5359, 2023 09 02.
Artigo em Inglês | MEDLINE | ID: mdl-37660105

RESUMO

The incorporation of machine learning methods into proteomics workflows improves the identification of disease-relevant biomarkers and biological pathways. However, machine learning models, such as deep neural networks, typically suffer from lack of interpretability. Here, we present a deep learning approach to combine biological pathway analysis and biomarker identification to increase the interpretability of proteomics experiments. Our approach integrates a priori knowledge of the relationships between proteins and biological pathways and biological processes into sparse neural networks to create biologically informed neural networks. We employ these networks to differentiate between clinical subphenotypes of septic acute kidney injury and COVID-19, as well as acute respiratory distress syndrome of different aetiologies. To gain biological insight into the complex syndromes, we utilize feature attribution-methods to introspect the networks for the identification of proteins and pathways important for distinguishing between subtypes. The algorithms are implemented in a freely available open source Python-package ( https://github.com/InfectionMedicineProteomics/BINN ).


Assuntos
Injúria Renal Aguda , COVID-19 , Humanos , Proteômica , Redes Neurais de Computação , Algoritmos
18.
South Med J ; 116(7): 519-523, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-37400094

RESUMO

OBJECTIVES: The aim of the study was to determine the relation between coronavirus disease 2019 (COVID-19) death exposure and COVID-19 vaccine hesitancy and vaccine uptake among Arkansans, controlling for sociodemographic factors. METHODS: Data were collected from a telephone survey administered in Arkansas between July 12 and July 30, 2021 (N = 1500) via random digit dialing of telephone landlines and cellular telephones. Weighted data were used to estimate regressions. RESULTS: Controlling for sociodemographic variables, COVID-19 death exposure was not a significant predictor of COVID-19 vaccine hesitancy (P = 0.423) or COVID-19 vaccine uptake (P = 0.318). Younger individuals, those with lower levels of education, and those who live in rural counties were more likely to be COVID-19 vaccine hesitant. Older individuals, Hispanic/Latinx individuals, those who reported higher levels of education, and those who reported living in urban counties were more likely to have reported receiving the COVID-19 vaccine. CONCLUSIONS: Many efforts to promote COVID-19 vaccines have focused on prosocial norms, including encouraging vaccination to protect the community from COVID-19 infection and death; however, COVID-19 death exposure was not related to COVID-19 vaccine hesitancy or uptake in the present study. Future research should examine whether prosocial messaging is effective in decreasing hesitancy or motivating some individuals to receive the vaccine among those who have been exposed to COVID-19 deaths.


Assuntos
COVID-19 , Vacinas , Humanos , Vacinas contra COVID-19 , COVID-19/epidemiologia , COVID-19/prevenção & controle , Escolaridade , Arkansas , Vacinação
19.
Int J Mol Sci ; 24(14)2023 Jul 14.
Artigo em Inglês | MEDLINE | ID: mdl-37511193

RESUMO

Over the last several decades, a number of new treatment options for patients with hepatocellular carcinoma (HCC) have been developed. While treatment decisions for some patients remain clear cut, a large numbers of patients have multiple treatment options, and it can be hard for multidisciplinary teams to come to unanimous decisions on which treatment strategy or sequence of treatments is best. This article reviews the available data with regard to two treatment strategies, immunotherapies and locoregional therapies, with a focus on the potential of locoregional therapies to be combined with checkpoint inhibitors to improve outcomes in patients with locally advanced HCC. In this review, the available data on the immunomodulatory effects of locoregional therapies is discussed along with available clinical data on outcomes when the two strategies are combined.


Assuntos
Carcinoma Hepatocelular , Quimioembolização Terapêutica , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/patologia , Neoplasias Hepáticas/patologia , Imunoterapia , Imunomodulação
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...