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1.
Bone Rep ; 23: 101808, 2024 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-39429803

RESUMEN

We previously reported an ability of low-intensity vibration (LIV) to improve selected biomarkers of bone turnover and gene expression and reduce osteoclastogenesis but lacking of evident bone accrual. In this study, we demonstrate that a prolonged course of LIV that initiated at 2 weeks post-injury and continued for 8 weeks can protect against bone loss after SCI in rats. LIV stimulates bone formation and improves osteoblast differentiation potential of bone marrow stromal stem cells while inhibiting osteoclast differentiation potential of marrow hematopoietic progenitors to reduce bone resorption. We further demonstrate that the combination of LIV and RANKL antibody reduces SCI-related bone loss more than each intervention alone. Our findings that LIV is efficacious in maintaining sublesional bone mass suggests that such physical-based intervention approach would be a noninvasive, simple, inexpensive and practical intervention to treat bone loss after SCI. Because the combined administration of LIV and RANKL inhibition better preserved sublesional bone after SCI than either intervention alone, this work provides the impetus for the development of future clinical protocols based on the potential greater therapeutic efficacy of combining non-pharmacological (e.g., LIV) and pharmacological (e.g., RANKL inhibitor or other agents) approaches to treat osteoporosis after SCI or other conditions associated with severe immobilization.

2.
Drug Alcohol Rev ; 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39364693

RESUMEN

INTRODUCTION: Most patients receiving opioid agonist treatment (OAT) smoke tobacco. Approved cessation interventions are less effective in this group than the wider population. We investigated how people on OAT experience nicotine vaping to quit smoking. METHODS: Patients on OAT randomised to the vaping arm of a smoking cessation trial were invited to participate in structured interviews incorporating broad pre-determined themes. A qualitative descriptive approach employing template analysis was used. Four authors coded transcripts, discussed discrepancies, modified the template using both inductive and deductive approaches. Authors made explicit their starting orientations and independent authors sought disconfirmatory data in a subsequent round of analysis. RESULTS: Four women and eight men (median age 44 years) participated, including four who identified as Aboriginal. Participants reported vaping as cheaper, more acceptable and less stigmatising than smoking but expressed concerns about ongoing accessibility due to the Australian prescription access model. Some found it technically challenging at first, but not more so than standard nicotine replacement therapies. Participants gave accounts of craving and withdrawal experiences, including supplementary use of nicotine patches, and compulsions to vape frequently and intensely, potentially indicating need for higher nicotine dosage. Participants generally reported that vaping helped them quit smoking, though some worried about swapping nicotine addictions. Others were glad to be using a lower-risk alternative. DISCUSSION AND CONCLUSIONS: This group reported varied experiences of nicotine vaping but were mainly optimistic that it could help them and others quit smoking. This was despite initial nicotine cravings and concerns about remaining addicted long-term.

3.
Gastrointest Endosc ; 2024 Sep 30.
Artículo en Inglés | MEDLINE | ID: mdl-39357660

RESUMEN

BACKGROUND AND AIMS: Covered self-expanding metal stents (C-SEMS) are used for malignant hilar biliary obstruction (MHBO) management. Despite increasing evidence, comprehensive evaluation of the efficacy and safety of C-SEMS in MHBO management is lacking. METHODS: PubMed, EMBASE, and the Cochrane Library were screened up to March 31, 2024 for studies including MHBO treated by a C-SEMS. Studies meeting predefined inclusion criteria, including adult MHBO patients treated with C-SEMS placement, reporting technical success, clinical success, and adverse event rates, were selected. Data synthesis and statistical analysis were performed using the random effects model, with heterogeneity and publication bias assessment. RESULTS: From 401 articles, seven studies were included. Pooled technical and clinical success rate of C-SEMS was 96.7% (95% CI 92.6-98.6%, I2=0%) and 91.6% (95% CI 86.1-95.0%, I2=0%). Overall adverse events were reported in 16.6% (95% CI 11.2-23.9%, I2=24%) of cases which included cholangitis (7.4%), pancreatitis (5.9%), liver abscess (5.9%), and cholecystitis (2.8%). Stent migration and recurrent biliary obstruction were observed in 8.9% and 49.6% of cases, respectively, with a median time to recurrent biliary obstruction of 142 days. Reintervention was successful in 92.5% of cases (95% CI 83.1-96.9%, I2=0%) CONCLUSION: Our meta-analysis revealed high technical and clinical success rates of C-SEMS in MHBO. Adverse events, notably cholangitis, cholecystitis, and pancreatitis were <10%. RBO and stent migration was mitigated by C-SEMS removal and successful reintervention. Our findings highlight the efficacy and safety of C-SEMS in managing MHBO, warranting further research to optimize treatment strategies.

4.
Ear Nose Throat J ; : 1455613241289692, 2024 Oct 09.
Artículo en Inglés | MEDLINE | ID: mdl-39385387
5.
Ear Nose Throat J ; : 1455613241277696, 2024 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-39264165
6.
J Am Acad Dermatol ; 2024 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-39243946

RESUMEN

BACKGROUND: Melanoma is increasingly recognized as a heterogeneous disease, with conflicting evidence regarding whether cutaneous head and neck melanoma (CHNM) represents a distinct entity. OBJECTIVE: Comparison of clinicopathological features and treatment outcomes of CHNM and cutaneous melanomas of other sites (CMOS). METHODS: Patients with CHNM and CMOS diagnosed between 2000 and 2018 were included. Locoregional control, distant metastasis-free survival, melanoma-specific survival (MSS), and overall survival (OS) were described using the Kaplan-Meier method. Cox regression analyses were performed to examine associations between prognostic factors and outcomes. Additional analyses of survival from time of stage IV disease diagnosis were undertaken, stratified by receipt of BRAF-targeted therapy and immune checkpoint inhibitor immunotherapy. RESULTS: Of 3007 CHNM and 10,637 CMOS patients, CHNM had more adverse pathological features (median age 65.9 vs 58.5, P < .001; median Breslow thickness 1.7 mm vs 1.2 mm, P < .001; and ulceration 21.2% vs 18.2%, P < .001). CHNM had worse locoregional control (hazard ratio (HR) 1.17, P < .001) and distant metastasis-free survival (HR 1.25, P < .001) but there were no significant differences in MSS or OS. Among stage IV patients who received immune checkpoint inhibitor, CHNM had better MSS (HR 0.56, P = .001) and OS (HR 0.57, P < .001) on multivariable analyses. LIMITATIONS: Retrospective study, offset by prospective data collection. CONCLUSION: CHNM is associated with a distinct clinicopathological and prognostic profile.

7.
Green Chem ; 26(19): 10139-10151, 2024 Sep 30.
Artículo en Inglés | MEDLINE | ID: mdl-39247131

RESUMEN

Surface sterilization and hazardous chemical degradation under ambient conditions can provide significant benefits for public and environmental health. Materials with sterilization and chemical degradation capacity under sunlight can efficiently reduce infectious disease incidence rates and toxic chemical exposure. Utilizing renewable energy for sustainable sterilization and degradation is more desirable as it reduces the potential secondary contamination. Herein, we report functional structure design using lignin, a renewable carbon heterogeneous polymer, to synthesize a highly efficient and stable photocatalyst that degrades environmentally hazardous organic compounds rapidly. Through a hydrolysis reaction between Ti-OH and the hydroxyl groups of lignin, Ti-O-C and Ti-O-Ti bonds were established and a lignin based photocatalyst with a hollow sphere structure (Clignin@H-TiO2) was formed. The presence of a homozygous carbon modified TiO2 structure contributes to the enhanced photodegradation activity with solar light. The close hetero-interfacial contact between carbonized lignin and TiO2 further improves the photocatalytic efficiency by facilitating effective charge carrier separation. After synthesis optimization, the resulting Clignin@H-TiO2 photocatalyst exhibits excellent performance in the degradation of atenolol under solar light irradiation with 100% degradation within five minutes. Additionally, it efficiently removes approximately 50% of PFOA and kills about 90% of bacteria within three hours. The uniform distribution of lignin within the crosslinking structures ensures a durable carbon modified TiO2 framework, which remains stable after 10 cycles of usage. The robustness of the lignin-based photocatalyst enables incorporating the catalyst into diversified material formats and various usages. Coating of the photocatalyst onto device surfaces shows bacterial killing efficacy under sunlight. The photocatalysts based on lignin valorization present a green chemistry approach for environmental remediation and surface sterilization, which has long-term environmental protection benefits, with broad applications in toxin treatment and health protection against pathogen infection.

8.
Ann Thorac Surg ; 2024 Sep 21.
Artículo en Inglés | MEDLINE | ID: mdl-39307215

RESUMEN

BACKGROUND: Anesthesia administered to a patient with a large mediastinal mass engenders concern that it may precipitate catastrophic acute hemodynamic or respiratory decompensation. A review of the available evidence is needed to define the degree of risk, mechanisms, and preventative or reactive interventions to mitigate the risk. METHODS: A systematic review of the PubMed database was conducted of studies involving adults with large mediastinal masses undergoing a procedure or anesthesia; all types of publications were included that provided data regarding risks, mechanisms, or techniques to address potential decompensation. This literature involves primarily case reports and small retrospective series; no quality assessment was deemed appropriate. Evidence was synthesized according to the consensus judgment of the writing panel. RESULTS: Categories of low-, moderate-, high-, and very-high-risk emerged from review of the 72 included studies, based on the degree of symptoms, mass/chest ratio, and degree of airway and/or vascular compression. This streamlines the preparation needed-minimal for low-risk and more extensive for higher-risk. Assessment of the impact of physiologic derangement stemming from the anatomic compression in individual patients provides a framework for anesthetic management, and back-up plans should decompensation occur. CONCLUSIONS: Despite limitations in the evidence inherent to a topic involving an uncommon but serious event, a framework was developed to streamline preparation for and management of patients with a large mediastinal mass requiring anesthesia in a rational manner.

9.
Thorax ; 79(11): 1024-1032, 2024 Oct 16.
Artículo en Inglés | MEDLINE | ID: mdl-39317451

RESUMEN

BACKGROUND: Lung function testing remains a cornerstone in the assessment and management of interstitial lung disease (ILD) patients. The clinical implications of the Global Lung function Initiative (GLI) reference equations and the updated interpretation strategies remain uncertain. METHODS: Adult patients with ILD with baseline forced vital capacity (FVC) were included from the Australasian ILD registry and the National Healthcare Group ILD registry, Singapore.The European Coal and Steel Community and Miller reference equations were compared with the GLI reference equations to assess (a) differences in lung function percent predicted values; (b) ILD risk prediction models and (c) eligibility for ILD clinical trial enrolment. RESULTS: Among 2219 patients with ILD, 1712 (77.2%) were white individuals. Idiopathic pulmonary fibrosis (IPF), connective tissue disease-associated ILD and unclassifiable ILD predominated.Median FVC was 2.60 (2.01-3.36) L, forced expiratory volume in 1 s was 2.09 (1.67-2.66) L and diffusing capacity of the lungs for carbon monoxide (DLCO) was 13.60 (10.16-17.60) mL/min/mm Hg. When applying the GLI reference equations, the mean FVC percentage predicted was 8.8% lower (87.7% vs 78.9%, p<0.01) while the mean DLCO percentage predicted was 4.9% higher (58.5% vs 63.4%, p<0.01). There was a decrease in 19 IPF and 119 non-IPF patients who qualified for the nintedanib clinical trials when the GLI reference equations were applied. Risk prediction models performed similarly in predicting mortality using both reference equations. CONCLUSION: Applying the GLI reference equations in patients with ILD leads to higher DLCO percentage predicted values and smaller lung volume percentage predicted values. While applying the GLI reference equations did not impact on prognostication, fewer patients met the clinical trial criteria for antifibrotic agents.


Asunto(s)
Enfermedades Pulmonares Intersticiales , Humanos , Enfermedades Pulmonares Intersticiales/fisiopatología , Femenino , Masculino , Persona de Mediana Edad , Anciano , Capacidad Vital/fisiología , Pruebas de Función Respiratoria , Sistema de Registros , Valores de Referencia , Volumen Espiratorio Forzado/fisiología
10.
Artículo en Inglés | MEDLINE | ID: mdl-38837669

RESUMEN

In this study, we compared the fat-saturated (FS) and non-FS turbo spin echo (TSE) magnetic resonance imaging knee sequences reconstructed conventionally (conventional-TSE) against a deep learning-based reconstruction of accelerated TSE (DL-TSE) scans. A total of 232 conventional-TSE and DL-TSE image pairs were acquired for comparison. For each consenting patient, one of the clinically acquired conventional-TSE proton density-weighted sequences in the sagittal or coronal planes (FS and non-FS), or in the axial plane (non-FS), was repeated using a research DL-TSE sequence. The DL-TSE reconstruction resulted in an image resolution that increased by at least 45% and scan times that were up to 52% faster compared to the conventional TSE. All images were acquired on a MAGNETOM Vida 3T scanner (Siemens Healthineers AG, Erlangen, Germany). The reporting radiologists, blinded to the acquisition time, were requested to qualitatively compare the DL-TSE against the conventional-TSE reconstructions. Despite having a faster acquisition time, the DL-TSE was rated to depict smaller structures better for 139/232 (60%) cases, equivalent for 72/232 (31%) cases and worse for 21/232 (9%) cases compared to the conventional-TSE. Overall, the radiologists preferred the DL-TSE reconstruction in 124/232 (53%) cases and stated no preference, implying equivalence, for 65/232 (28%) cases. DL-TSE reconstructions enabled faster acquisition times while enhancing spatial resolution and preserving the image contrast. From these results, the DL-TSE provided added or comparable clinical value and utility in less time. DL-TSE offers the opportunity to further reduce the overall examination time and improve patient comfort with no loss in diagnostic accuracy.

11.
Cancers (Basel) ; 16(11)2024 Jun 05.
Artículo en Inglés | MEDLINE | ID: mdl-38893268

RESUMEN

Circulating plasma cells (CPCs) are detected in most multiple myeloma (MM) patients, both at diagnosis and on relapse. A small subset, plasma cell leukemia (PCL), represents a different biology and has a poor prognosis. In this retrospective analysis, we evaluated patients with primary (pPCL, n = 35) or secondary (sPCL, n = 49), with ≥5% CPCs and a smaller subset with lower CPCs of 1-4% (n = 20). The median age was 61 years; 45% were men and 54% were Black. High-risk cytogenetics were found in 87% and extramedullary disease in 47%. For the entire cohort, 75% received a proteasome inhibitor, 70% chemotherapy, 54% an immunomodulatory drug, 24% a daratumumab-based regimen and 26% an autologous stem cell transplant (ASCT). The treatments marginally improved the overall survival (OS) for pPCL vs. sPCL (13 vs. 3.5 months p = 0.002). However, the 5-year survival for the whole cohort was dismal at 11%. High-risk cytogenetics, low platelets, extramedullary disease and high LDH were independently associated with poor outcomes. Further research is urgently needed to expand the treatment options and improve the outcomes in PCL.

12.
Int J Biol Macromol ; 272(Pt 1): 132798, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38838896

RESUMEN

The emergence of various variants of concern (VOCs) necessitates the development of more efficient vaccines for COVID-19. In this study, we established a rapid and robust production platform for a novel subunit vaccine candidate based on eukaryotic HEK-293 T cells. The immunogenicity of the vaccine candidate was evaluated in pigs. The results demonstrated that the pseudovirus neutralizing antibody (pNAb) titers reached 7751 and 306 for the SARS-CoV-2 Delta and Omicron variants, respectively, after the first boost. Subsequently, pNAb titers further increased to 10,201 and 1350, respectively, after the second boost. Additionally, ELISPOT analysis revealed a robust T-cell response characterized by IFN-γ (171 SFCs/106 cells) and IL-2 (101 SFCs/106 cells) production. Our study demonstrates that a vaccine candidate based on the Delta variant spike protein may provide strong and broad protection against the prototype SARS-CoV-2 and VOCs. Moreover, the strategy for the efficient and stable expression of recombinant proteins utilizing HEK-293 T cells can be employed as a universal platform for future vaccine development.


Asunto(s)
Anticuerpos Neutralizantes , Vacunas contra la COVID-19 , COVID-19 , SARS-CoV-2 , Glicoproteína de la Espiga del Coronavirus , Vacunas de Subunidad , Animales , Humanos , Células HEK293 , Vacunas contra la COVID-19/inmunología , Vacunas de Subunidad/inmunología , SARS-CoV-2/inmunología , Anticuerpos Neutralizantes/inmunología , Porcinos , COVID-19/prevención & control , COVID-19/inmunología , Glicoproteína de la Espiga del Coronavirus/inmunología , Anticuerpos Antivirales/inmunología , Linfocitos T/inmunología , Inmunogenicidad Vacunal
13.
J Plast Reconstr Aesthet Surg ; 94: 229-237, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38823079

RESUMEN

BACKGROUND: Targeted muscle reinnervation (TMR) has been shown to reduce phantom limb pain (PLP) and residual limb pain (RLP) after major limb amputation. However, the effect of the timing of surgery on pain control and quality of life outcomes is controversial. We conducted a retrospective study to compare the outcomes of acute TMR for pain prevention with non-acute TMR for the treatment of established pain. METHODS: All patients treated with TMR in our institution between January 2018 and December 2021 were evaluated at 6, 12, 18 and 24 months post-operatively. Pain intensity and quality of life outcomes were assessed using the Brief Pain Inventory (Pain Severity and Pain Interference scales) and Pain Catastrophizing Scale. Outcomes were compared between acute and non-acute TMR using the Wilcoxon ranked-sum test or Fisher's exact test as appropriate. Multilevel mixed-effects linear regression was used to account for repeat measures and potential pain confounders. RESULTS: Thirty-two patients with 38 major limb amputations were included. Acute TMR patients reported significantly lower RLP and PLP scores, pain interference and pain catastrophisation at all time points (p < 0.05). Acute TMR was significantly associated with lower pain severity and pain interference in a linear mixed-effects model accounting for patient age, gender, amputation indication, amputation site, time post-TMR and repeated surveys (p < 0.05). There was no significant difference in the complication rate (p = 0.51). CONCLUSION: Acute TMR was associated with clinically and statistically significant pain outcomes that were better than that in non-acute TMR. This suggests that TMR should be performed with preventative intent, when possible, as part of a multidisciplinary approach to pain management, rather than deferred until the development of chronic pain.


Asunto(s)
Amputación Quirúrgica , Músculo Esquelético , Dimensión del Dolor , Miembro Fantasma , Humanos , Masculino , Femenino , Amputación Quirúrgica/efectos adversos , Persona de Mediana Edad , Estudios Retrospectivos , Miembro Fantasma/prevención & control , Miembro Fantasma/etiología , Músculo Esquelético/inervación , Calidad de Vida , Dolor Postoperatorio/etiología , Dolor Postoperatorio/prevención & control , Dolor Postoperatorio/diagnóstico , Anciano , Transferencia de Nervios/métodos , Adulto , Manejo del Dolor/métodos
14.
ACS Nano ; 18(24): 15729-15743, 2024 Jun 18.
Artículo en Inglés | MEDLINE | ID: mdl-38839059

RESUMEN

Lipid nanoparticles (LNP) have emerged as pivotal delivery vehicles for RNA therapeutics. Previous research and development usually assumed that LNPs are homogeneous in population, loading density, and composition. Such perspectives are difficult to examine due to the lack of suitable tools to characterize these physicochemical properties at the single-nanoparticle level. Here, we report an integrated spectroscopy-chromatography approach as a generalizable strategy to dissect the complexities of multicomponent LNP assembly. Our platform couples cylindrical illumination confocal spectroscopy (CICS) with single-nanoparticle free solution hydrodynamic separation (SN-FSHS) to simultaneously profile population identity, hydrodynamic size, RNA loading levels, and distributions of helper lipid and PEGylated lipid of LNPs at the single-particle level and in a high-throughput manner. Using a benchmark siRNA LNP formulation, we demonstrate the capability of this platform by distinguishing seven distinct LNP populations, quantitatively characterizing size distribution and RNA loading level in wide ranges, and more importantly, resolving composition-size correlations. This SN-FSHS-CICS analysis provides critical insights into a substantial degree of heterogeneity in the packing density of RNA in LNPs and size-dependent loading-size correlations, explained by kinetics-driven assembly mechanisms of RNA LNPs.


Asunto(s)
Lípidos , Nanopartículas , Tamaño de la Partícula , Nanopartículas/química , Lípidos/química , ARN/química , Cromatografía/métodos , ARN Interferente Pequeño/química , Análisis Espectral/métodos , Liposomas
15.
Gynecol Oncol ; 186: 199-203, 2024 07.
Artículo en Inglés | MEDLINE | ID: mdl-38833852

RESUMEN

BACKGROUND: Patients may use crowdfunding to solicit donations, typically from multiple small donors using internet-based means, to offset the financial toxicity of cancer care. OBJECTIVE: To describe crowdfunding campaigns by gynecologic cancer patients and to compare campaign characteristics and needs expressed between patients with cervical, uterine, and ovarian cancer. STUDY DESIGN: We queried the public crowdfunding forum GoFundMe.com for "cervical cancer," "uterine cancer," and "ovarian cancer." The first 200 consecutive posts for each cancer type fundraising within the United States were analyzed. Data on campaign goals and needs expressed were manually extracted. Descriptive statistics and bivariate analyses were performed. RESULTS: Among the 600 fundraising pages, the median campaign goal was $10,000 [IQR $5000-$23,000]. Campaigns raised a median of 28.6% of their goal with only 8.7% of campaigns reaching their goal after a median of 54 days online. On average, ovarian cancer campaigns had higher monetary goals, more donors, and larger donation amounts than cervical cancer campaigns and raised more money than both cervical and uterine cancer campaigns. Campaigns were fundraising to support medical costs (80-85%) followed by lost wages (36-56%) or living expenses (27-41%). Cervical cancer campaigns reported need for non-medical costs more frequently than uterine or ovarian cancer campaigns. States without Medicaid expansions (31% of the national population) were over-represented among cervical cancer and uterine cancer, but not ovarian cancer campaigns. CONCLUSIONS: Crowdfunding pages reveal patients fundraising for out-of-pocket costs in the thousands of dollars and a wide range of unmet financial needs based on cancer type.


Asunto(s)
Obtención de Fondos , Neoplasias de los Genitales Femeninos , Humanos , Femenino , Obtención de Fondos/economía , Neoplasias de los Genitales Femeninos/economía , Neoplasias de los Genitales Femeninos/terapia , Estados Unidos , Colaboración de las Masas/economía , Neoplasias del Cuello Uterino/economía , Neoplasias del Cuello Uterino/terapia , Neoplasias Ováricas/economía , Neoplasias Ováricas/terapia
16.
bioRxiv ; 2024 Jun 06.
Artículo en Inglés | MEDLINE | ID: mdl-38895329

RESUMEN

Tau aggregation is a hallmark of several neurodegenerative diseases, including Alzheimer's disease and frontotemporal dementia. There are disease-causing variants of the tau-encoding gene, MAPT, and the presence of tau aggregates is highly correlated with disease progression. However, the molecular mechanisms linking pathological tau to neuronal dysfunction are not well understood due to our incomplete understanding of the normal functions of tau in development and aging and how these processes change in the context of causal disease variants of tau. To address these questions in an unbiased manner, we conducted multi-omic characterization of iPSC-derived neurons harboring the MAPT V337M mutation. RNA-seq and phosphoproteomics revealed that both V337M tau and tau knockdown consistently perturbed levels of transcripts and phosphorylation of proteins related to axonogenesis or axon morphology. Surprisingly, we found that neurons with V337M tau had much lower tau phosphorylation than neurons with WT tau. We conducted functional genomics screens to uncover regulators of tau phosphorylation in neurons and found that factors involved in axonogenesis modified tau phosphorylation in both MAPT WT and MAPT V337M neurons. Intriguingly, the p38 MAPK pathway specifically modified tau phosphorylation in MAPT V337M neurons. We propose that V337M tau might perturb axon morphology pathways and tau hypophosphorylation via a "loss of function" mechanism, which could contribute to previously reported cognitive changes in preclinical MAPT gene carriers.

17.
bioRxiv ; 2024 Jun 13.
Artículo en Inglés | MEDLINE | ID: mdl-38915516

RESUMEN

White matter hyperintensities (WMHs) are commonly detected on T2-weighted magnetic resonance imaging (MRI) scans, occurring in both typical aging and Alzheimer's disease. Despite their frequent appearance and their association with cognitive decline, the molecular factors contributing to WMHs remain unclear. In this study, we investigated the transcriptomic profiles of two commonly affected brain regions with coincident AD pathology-frontal subcortical white matter (frontal-WM) and occipital subcortical white matter (occipital-WM)-and compared with age-matched healthy controls. Through RNA-sequencing in frontal- and occipital-WM bulk tissues, we identified an upregulation of genes associated with brain vasculature function in AD white matter. To further elucidate vasculature-specific transcriptomic features, we performed RNA-seq analysis on blood vessels isolated from these white matter regions, which revealed an upregulation of genes related to protein folding pathways. Finally, comparing gene expression profiles between AD individuals with high- versus low-WMH burden showed an increased expression of pathways associated with immune function. Taken together, our study characterizes the diverse molecular profiles of white matter changes in AD compared to normal aging and provides new mechanistic insights processes underlying AD-related WMHs.

19.
J Med Entomol ; 61(4): 975-983, 2024 Jul 12.
Artículo en Inglés | MEDLINE | ID: mdl-38726974

RESUMEN

White-tailed deer, Odocoileus virginianus Zimmermann (Artiodactyla: Cervidae), are the primary wildlife host for adult stages of blacklegged ticks (Acari: Ixodidae: Ixodes scapularis Say) and an important host for lone star ticks (Acari: Ixodidae: Amblyomma americanum Linnaeus), both of which are vectors of numerous tick-borne pathogens. The 4-poster passive deer treatment device is a topical, host-targeted method to control free-living tick populations and has been proven to successfully reduce tick abundance in several states. Aggressive behavior of white-tailed deer at concentrated feeding stations is hypothesized to interfere with the effective use of 4-poster devices and deer contact with acaricide applicators. We analyzed images collected by camera traps at 4-poster feeding stations deployed at 3 sites in Maryland and found a negative relationship between some aggressive interactions and contact with applicators. Our results emphasize the need for further investigation into whether deer social dynamics can impact 4-poster efficacy for tick control. This study serves as a reminder that intraspecific interactions are important to consider when using host-targeted acaricide approaches.


Asunto(s)
Ciervos , Control de Ácaros y Garrapatas , Infestaciones por Garrapatas , Animales , Ciervos/parasitología , Control de Ácaros y Garrapatas/métodos , Infestaciones por Garrapatas/veterinaria , Infestaciones por Garrapatas/prevención & control , Infestaciones por Garrapatas/parasitología , Agresión , Ixodes/fisiología , Acaricidas , Amblyomma , Maryland , Ixodidae/fisiología
20.
J Am Geriatr Soc ; 72(7): 2174-2183, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38801317

RESUMEN

BACKGROUND: Since the beginning of the COVID-19 pandemic, older Asians have experienced a rise in racism and discrimination based on their race and ethnicity. This study examines how anti-Asian hate impacts older Asians' mental, social, and physical health. METHODS: From March 18, 2022 to January 24, 2023, we conducted a cross-sectional survey study of community-dwelling Asian/Asian American adults aged ≥50 years from the San Francisco Bay Area. Measures included perceptions of anti-Asian hate; direct encounters with hate incidents; indirect experiences with hate incidents (e.g. knowing a friend who was a victim); reports of anxiety, depression, loneliness, and changes in daily activities; ways to address these issues; and discussions with clinicians about hate incidents. RESULTS: Of the 293 older Asians, 158 (54%) were Vietnamese and 97 (33%) Chinese. Eighty-five (29%) participants were direct victims of anti-Asian hate, 112 (38%) reported anxiety, 105 (36%) reported depression, 161 (55%) reported loneliness, and 142 (48%) reported decreased daily activities. Compared with those who were "not-at-all" to "moderately" worried about hate incidents, participants who were "very" to "extremely" worried experienced heightened anxiety (42% versus 16%), loneliness (30% versus 14%), and changes in daily activities (66% versus 31%), p < 0.01 for all. Most participants (72%) felt comfortable discussing hate incidents with clinicians; however, only 31 (11%) reported that a clinician had talked with them about these incidents. CONCLUSION: Both directly and indirectly, anti-Asian hate negatively impacts older Asians' mental, social, and physical health. Clinicians have a role in addressing the health impacts of anti-Asian hate.


Asunto(s)
Asiático , COVID-19 , Odio , Soledad , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Actividades Cotidianas/psicología , Ansiedad/psicología , Ansiedad/etnología , Asiático/psicología , COVID-19/psicología , Estudios Transversales , Depresión/etnología , Depresión/psicología , Estado de Salud , Soledad/psicología , Racismo/psicología , Racismo/estadística & datos numéricos , San Francisco/epidemiología , Encuestas y Cuestionarios
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