Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 319
Filtrar
1.
Addict Behav ; 155: 108045, 2024 08.
Artículo en Inglés | MEDLINE | ID: mdl-38692071

RESUMEN

INTRODUCTION: Concurrent users of tobacco and alcohol are at greater risk of harm than use of either substance alone. It remains unclear how concurrent tobacco and alcohol use affects smoking cessation across levels of alcohol use and related problems. This study assessed the relationship between smoking cessation and levels of alcohol use problems. METHODS: 59,018 participants received nicotine replacement therapy through a smoking cessation program. Alcohol use and related symptoms were assessed using the Alcohol Use Disorders Identification Test (AUDIT-10) and the AUDIT-Concise (AUDIT-C). The primary outcome was 7-day point prevalence cigarette abstinence (PPA) at 6-month follow-up. We evaluated the association between alcohol use (and related problems) and smoking cessation using descriptive methods and mixed-effects logistic regression. RESULTS: 7-day PPA at 6-months was lower in groups meeting hazardous alcohol consumption criteria, with the lowest probability of smoking abstinence observed in the highest risk group. The probability of successful tobacco cessation fell with increasing levels of alcohol use and related problems. Adjusted predicted probabilities were 30.3 (95 % CI = 29.4, 31.1) for non-users, 30.2 (95 % CI = 29.4, 31.0) for low-risk users, 29.0 (95 % CI = 28.1, 29.9) for those scoring below 8 on the AUDIT-10, 27.3 (95 % CI = 26.0, 28.6) for those scoring 8-14, and 24.4 (95 % CI = 22.3, 26.5) for those scoring 15 or higher. CONCLUSION: Heavy, hazardous alcohol use is associated with lower odds of successfully quitting smoking compared to low or non-use of alcohol. Targeting alcohol treatment to this group may improve tobacco cessation outcomes.


Asunto(s)
Cese del Hábito de Fumar , Dispositivos para Dejar de Fumar Tabaco , Humanos , Cese del Hábito de Fumar/métodos , Cese del Hábito de Fumar/estadística & datos numéricos , Masculino , Femenino , Persona de Mediana Edad , Adulto , Consumo de Bebidas Alcohólicas/epidemiología , Resultado del Tratamiento , Alcoholismo/epidemiología , Tabaquismo/terapia , Terapia de Reemplazo de Nicotina
2.
Eur Heart J ; 45(21): 1877-1886, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38190428

RESUMEN

BACKGROUND AND AIMS: Severe aortic stenosis (AS) is the guideline-based indication for aortic valve replacement (AVR), which has markedly increased with transcatheter approaches, suggesting possible increasing AS incidence. However, reported secular trends of AS incidence remain contradictory and lack quantitative Doppler echocardiographic ascertainment. METHODS: All adults residents in Olmsted County (MN, USA) diagnosed over 20 years (1997-2016) with incident severe AS (first diagnosis) based on quantitatively defined measures (aortic valve area ≤ 1 cm2, aortic valve area index ≤ 0.6 cm2/m2, mean gradient ≥ 40 mmHg, peak velocity ≥ 4 m/s, Doppler velocity index ≤ 0.25) were counted to define trends in incidence, presentation, treatment, and outcome. RESULTS: Incident severe AS was diagnosed in 1069 community residents. The incidence rate was 52.5 [49.4-55.8] per 100 000 patient-year, slightly higher in males vs. females and was almost unchanged after age and sex adjustment for the US population 53.8 [50.6-57.0] per 100 000 residents/year. Over 20 years, severe AS incidence remained stable (P = .2) but absolute burden of incident cases markedly increased (P = .0004) due to population growth. Incidence trend differed by sex, stable in men (incidence rate ratio 0.99, P = .7) but declining in women (incidence rate ratio 0.93, P = .02). Over the study, AS clinical characteristics remained remarkably stable and AVR performance grew and was more prompt (from 1.3 [0.1-3.3] years in 1997-2000 to 0.5 [0.2-2.1] years in 2013-16, P = .001) but undertreatment remained prominent (>40%). Early AVR was associated with survival benefit (adjusted hazard ratio 0.55 [0.42-0.71], P < .0001). Despite these improvements, overall mortality (3-month 8% and 3-year 36%), was swift, considerable and unabated (all P ≥ .4) throughout the study. CONCLUSIONS: Over 20 years, the population incidence of severe AS remained stable with increased absolute case burden related to population growth. Despite stable severe AS presentation, AVR performance grew notably, but while declining, undertreatment remained substantial and disease lethality did not yet decline. These population-based findings have important implications for improving AS management pathways.


Asunto(s)
Estenosis de la Válvula Aórtica , Humanos , Estenosis de la Válvula Aórtica/epidemiología , Masculino , Femenino , Incidencia , Anciano , Persona de Mediana Edad , Minnesota/epidemiología , Anciano de 80 o más Años , Reemplazo de la Válvula Aórtica Transcatéter/tendencias , Reemplazo de la Válvula Aórtica Transcatéter/estadística & datos numéricos , Ecocardiografía Doppler , Implantación de Prótesis de Válvulas Cardíacas/tendencias , Implantación de Prótesis de Válvulas Cardíacas/estadística & datos numéricos , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
3.
World Neurosurg ; 183: e549-e555, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38171479

RESUMEN

OBJECTIVE: Cerebrospinal fluid shunt placement is associated with high rates of infection. Multiple standardized protocols, particularly in pediatric populations, have been proposed to mitigate this infection rate. We sought to determine the effectiveness of a standardized shunt infection protocol in a large adult population. METHODS: A retrospective cohort study of adults presenting for primary cerebrospinal fluid shunt placement from 2012 to 2022. The primary outcome of interest was shunt infection. The primary exposure of interest was implementation of the shunt protocol (began October 2015). Secondary exposures of interest included use and type of perioperative antibiotics and total operating room time. RESULTS: In total, 820 patients were included, 140 before protocol implementation and 680 after protocol implementation. The overall number of infections over the study period was 15 (1.8% infection rate), with 8 infections preprotocol (5.7%) and 7 infections during the protocol period (1.0%). The infection protocol was associated with a decreased infection rate (odds rato [OR] 0.18, 95% confidence interval [CI] 0.05-0.58, P = 0.002). Total operating room time (OR 1.38 per 30-minute increase, 95% CI 1.05-1.81, P = 0.021) was associated with increased infection rate. Patients who received antibiotics with primarily gram-positive coverage (cefazolin or equivalent) did not have significantly different odds of shunt infection as patients who received broad-spectrum coverage (OR 2.10, 95% CI 0.56-7.88, P = 0.274). CONCLUSIONS: The implementation of an evidence-based perioperative shunt infection protocol is an effective method to decrease shunt infections. Broad-spectrum perioperative antibiotics may not have greater efficacy than gram-positive only coverage, but more research is required.


Asunto(s)
Hidrocefalia , Niño , Adulto , Humanos , Lactante , Estudios Retrospectivos , Hidrocefalia/cirugía , Derivaciones del Líquido Cefalorraquídeo/métodos , Antibacterianos/uso terapéutico , Reoperación
4.
Chest ; 165(1): 68-78, 2024 01.
Artículo en Inglés | MEDLINE | ID: mdl-37574164

RESUMEN

BACKGROUND: There are several antibiotic regimens to treat community-acquired pneumonia (CAP). RESEARCH QUESTION: In patients hospitalized to a non-ICU ward setting with CAP, is there a difference between first-line and alternative antibiotic regimens (ß-lactam plus macrolide [BL+M], ß-lactam [BL] alone, respiratory fluoroquinolone [FQ], or ß-lactam plus doxycycline [BL+D]) in terms of in-hospital mortality? STUDY DESIGN AND METHODS: This retrospective cohort study included consecutive patients admitted with CAP at 19 Canadian hospitals from 2015 to 2021. Taking a target trial approach, patients were categorized into the four antibiotic groups based on the initial antibiotic treatment within 48 h of admission. Patients with severe CAP requiring ICU admission in the first 48 h were excluded. The primary outcome was all-cause in-hospital mortality. Secondary outcome included time to being discharged alive. Propensity score and overlap weighting were used to balance covariates. RESULTS: Of 23,512 patients, 9,340 patients (39.7%) received BL+M, 9,146 (38.9%) received BL, 4,510 (19.2%) received FQ, and 516 (2.2%) received BL+D. The number of in-hospital deaths was 703 (7.5%) for the BL+M group, 888 (9.7%) for the BL group, 302 (6.7%) for the FQ group, and 31 (6.0%) for the BL+D group. The adjusted risk difference for in-hospital mortality when compared with BL+M was 1.5% (95% CI, -0.3% to 3.3%) for BL, -0.9% (95% CI, -2.9% to 1.1%) for FQ, and -1.9% (95% CI, -4.8% to 0.9%) for BL+D. Compared with BL+M, the subdistribution hazard ratio for being discharged alive was 0.90 (95% CI, 0.84-0.96) for BL, 1.07 (95% CI, 0.99-1.16) for FQ, and 1.04 (95% CI, 0.93-1.17) for BL+D. INTERPRETATION: BL+M, FQ, and BL+D had similar outcomes and can be considered effective regimens for nonsevere CAP. Compared with BL+M, BL was associated with longer time to discharge and the CI for mortality cannot exclude a small but clinically important increase in risk.


Asunto(s)
Infecciones Comunitarias Adquiridas , Neumonía , Humanos , Antibacterianos/uso terapéutico , beta-Lactamas/uso terapéutico , Canadá/epidemiología , Infecciones Comunitarias Adquiridas/tratamiento farmacológico , Quimioterapia Combinada , Tiempo de Internación , Macrólidos/uso terapéutico , Neumonía/tratamiento farmacológico , Estudios Retrospectivos
5.
Cureus ; 15(8): e43192, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37692604

RESUMEN

Global surgery broadly refers to a rapidly expanding multidisciplinary field concerned with providing better and equitable surgical care across international health systems. Global surgery initiatives primarily focus on capacity building, advocacy, education, research, and policy development in low- and middle-income countries (LMICs). The inadequate surgical, anesthetic, and obstetric care currently contributes to 18 million preventable deaths each year. Hence, there is a growing interest in the rapid growth of artificial intelligence (AI) that provides a distinctive opportunity to enhance surgical services in LMICs. AI modalities have been used for personalizing surgical education, automating administrative tasks, and developing realistic and cost-effective simulation-training programs with provisions for people with special needs. Furthermore, AI may assist with providing insights for governance, infrastructure development, and monitoring/predicting stock take or logistics failure that can help in strengthening global surgery pillars. Numerous AI-assisted telemedicine-based platforms have allowed healthcare professionals to virtually assist in complex surgeries that may help to improve surgical accessibility across LMICs. Challenges in implementing AI technology include the misrepresentation of minority populations in the datasets leading to discriminatory bias. Human hesitancy, employment uncertainty, automation bias, and role of confounding factors need to be further studied for equitable utilization of AI. With a focused and evidence-based approach, AI could help several LMICs overcome bureaucratic inefficiency and develop more efficient surgical systems.

6.
ACS Nano ; 17(17): 16412-16431, 2023 09 12.
Artículo en Inglés | MEDLINE | ID: mdl-37582231

RESUMEN

The complexity of CRISPR machinery is a challenge to its application for nonviral in vivo therapeutic gene editing. Here, we demonstrate that proteins, regardless of size or charge, efficiently load into porous silicon nanoparticles (PSiNPs). Optimizing the loading strategy yields formulations that are ultrahigh loading─>40% cargo by volume─and highly active. Further tuning of a polymeric coating on the loaded PSiNPs yields nanocomposites that achieve colloidal stability under cryopreservation, endosome escape, and gene editing efficiencies twice that of the commercial standard Lipofectamine CRISPRMAX. In a mouse model of arthritis, PSiNPs edit cells in both the cartilage and synovium of knee joints, and achieve 60% reduction in expression of the therapeutically relevant MMP13 gene. Administered intramuscularly, they are active over a broad dose range, with the highest tested dose yielding nearly 100% muscle fiber editing at the injection site. The nanocomposite PSiNPs are also amenable to systemic delivery. Administered intravenously in a model that mimics muscular dystrophy, they edit sites of inflamed muscle. Collectively, the results demonstrate that the PSiNP nanocomposites are a versatile system that can achieve high loading of diverse cargoes and can be applied for gene editing in both local and systemic delivery applications.


Asunto(s)
Sistemas CRISPR-Cas , Nanopartículas , Ratones , Animales , Sistemas CRISPR-Cas/genética , Silicio , Porosidad , Polímeros
7.
Front Neurosci ; 17: 1180294, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37332861

RESUMEN

Introduction: Myocardial ischemia disrupts the cardio-spinal neural network that controls the cardiac sympathetic preganglionic neurons, leading to sympathoexcitation and ventricular tachyarrhythmias (VTs). Spinal cord stimulation (SCS) is capable of suppressing the sympathoexcitation caused by myocardial ischemia. However, how SCS modulates the spinal neural network is not fully known. Methods: In this pre-clinical study, we investigated the impact of SCS on the spinal neural network in mitigating myocardial ischemia-induced sympathoexcitation and arrhythmogenicity. Ten Yorkshire pigs with left circumflex coronary artery (LCX) occlusion-induced chronic myocardial infarction (MI) were anesthetized and underwent laminectomy and a sternotomy at 4-5 weeks post-MI. The activation recovery interval (ARI) and dispersion of repolarization (DOR) were analyzed to evaluate the extent of sympathoexcitation and arrhythmogenicity during the left anterior descending coronary artery (LAD) ischemia. Extracellular in vivo and in situ spinal dorsal horn (DH) and intermediolateral column (IML) neural recordings were performed using a multichannel microelectrode array inserted at the T2-T3 segment of the spinal cord. SCS was performed for 30 min at 1 kHz, 0.03 ms, 90% motor threshold. LAD ischemia was induced pre- and 1 min post-SCS to investigate how SCS modulates spinal neural network processing of myocardial ischemia. DH and IML neural interactions, including neuronal synchrony as well as cardiac sympathoexcitation and arrhythmogenicity markers were evaluated during myocardial ischemia pre- vs. post-SCS. Results: ARI shortening in the ischemic region and global DOR augmentation due to LAD ischemia was mitigated by SCS. Neural firing response of ischemia-sensitive neurons during LAD ischemia and reperfusion was blunted by SCS. Further, SCS showed a similar effect in suppressing the firing response of IML and DH neurons during LAD ischemia. SCS exhibited a similar suppressive impact on the mechanical, nociceptive and multimodal ischemia sensitive neurons. The LAD ischemia and reperfusion-induced augmentation in neuronal synchrony between DH-DH and DH-IML pairs of neurons were mitigated by the SCS. Discussion: These results suggest that SCS is decreasing the sympathoexcitation and arrhythmogenicity by suppressing the interactions between the spinal DH and IML neurons and activity of IML preganglionic sympathetic neurons.

8.
Heliyon ; 9(5): e15768, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-37206018

RESUMEN

Current literature outlines the documented need for improved communication during patient medication counseling. Although many tools exist, there needs to be a national standardized tool that complies with federal and state law, to objectively measure student pharmacist performance during patient counseling in the community pharmacy setting. The primary objective of this study is to perform an initial analysis of the internal consistency reliability of a patient medication counseling rubric designed with an Indian Health Services theoretical framework. Secondary objectives include measuring changes in student performance over the time of the study. The 18-item rubric was developed to objectively measure student pharmacist performance during patient medication counseling sessions in a 21-h Introductory Pharmacy Practice Experience (IPPE) course. The community-pharmacy-based IPPE patient counseling course evaluates students' communication skills and patient-centered counseling techniques in live and simulated patient counseling sessions. Three pharmacist evaluators assessed a total of 247 student counseling sessions. The rubric's internal consistency reliability was analyzed, and student performance improvement was observed within the course. Students' performance was evaluated as "meets expectations" in most live and simulated sessions. However, an independent groups t-test showed that the mean performance score for the live counseling sessions (2.59, SD = 0.29) was higher (p < 0.001) than that for the simulated counseling sessions (2.35, SD = 0.35). Students' performance in the course improved over three weeks [Week 1: mean (SD) = 2.29 (0.32), Week 2: mean (SD) = 2.44 (0.33), Week 3: mean (SD) = 2.62 (0.29); p < 0.001]. A Tukey-Kramer comparison post hoc test found a significant increase in the mean performance scores between weeks (p < 0.05). The overall internal consistency reliability of the counseling rubric was determined acceptable, with a Cronbach's alpha of 0.75. Further study is required, including the assessment of inter-rater reliability, factor analysis, variable analysis, and use in other states with patient confirmation testing necessary to validate the rubric for use with student pharmacists in the community pharmacy setting.

9.
bioRxiv ; 2023 Apr 02.
Artículo en Inglés | MEDLINE | ID: mdl-37034633

RESUMEN

Protein translation is essential for some forms of synaptic plasticity. We used nucleus accumbens (NAc) medium spiny neurons (MSN), co-cultured with cortical neurons to restore excitatory synapses, to examine whether dopamine modulates protein translation in NAc MSN. FUNCAT was used to measure translation in MSNs under basal conditions and after disinhibiting excitatory transmission using the GABAA receptor antagonist bicuculline (2 hr). Under basal conditions, translation was not altered by the D1-class receptor (D1R) agonist SKF81297 or the D2-class receptor (D2R) agonist quinpirole. Bicuculline alone robustly increased translation. This was reversed by quinpirole but not SKF81297. It was also reversed by co-incubation with the D1R antagonist SCH23390, but not the D2R antagonist eticlopride, suggesting dopaminergic tone at D1Rs. This was surprising because no dopamine neurons are present. An alternative explanation is that bicuculline activates translation by increasing glutamate tone at NMDA receptors (NMDAR) within D1R/NMDAR heteromers, which have been described in other cell types. Supporting this, immunocytochemistry and proximity ligation assays revealed D1/NMDAR heteromers on NAc cells both in vitro and in vivo. Further, bicuculline's effect was reversed to the same extent by SCH23390 alone, the NMDAR antagonist APV alone, or SCH23390+APV. These results suggest that: 1) excitatory synaptic transmission stimulates translation in NAc MSNs, 2) this is opposed when glutamate activates D1R/NMDAR heteromers, even in the absence of dopamine, and 3) antagonist occupation of D1Rs within the heteromers prevents their activation. Our study is the first to suggest a role for D2 receptors and D1R/NMDAR heteromers in regulating protein translation.

12.
Eur Econ Rev ; 153: 104385, 2023 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-36714546

RESUMEN

We estimate the euro area output gap by applying the Beveridge-Nelson decomposition based on a large Bayesian vector autoregression. Our approach incorporates multivariate information through the inclusion of a wide range of variables in the analysis and addresses data issues associated with the COVID-19 pandemic. The estimated output gap lines up well with the CEPR chronology of the business cycle for the euro area and we find that hours worked, more than the unemployment rate, provides the key source of information about labor utilization in the economy, especially in pinning down the depth of the output gap during the COVID-19 recession when the unemployment rate rose only moderately. Our findings confirm that labor market adjustments to the business cycle in the euro area occur more through the intensive, rather than extensive, margin.

13.
Food Chem ; 405(Pt B): 134223, 2023 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-36403465

RESUMEN

There is a little information about the effect of corn process conditions on the bioactive compounds of tortillas during gastrointestinal digestion. Tortillas elaborated with traditional and extrusion nixtamalization process were subjected to in vitro digestion. Extracts recovered from digestion were employed to determine the changes in phytochemicals, bioaccesibility and antioxidant capacity (DPPH, ABTS and FRAP). Digestion contributed to a greater solubilization of phenolic compounds in raw corn and tortillas, especially in the intestinal phase (311.4-583.2 mg GAE/100 g). With bioaccessibility indexes of 162.83 to 960.7 %. Intestinal phase affected the content of anthocyanins, reaching a lower bioaccessibility value than the found in undigested samples (17.90-29.91 %). Even though the traditional white tortilla showed the highest bioaccessibility values, blue tortilla showed a higher antioxidant activity in different phases of digestion. Both tortillas could function as prebiotic agents in the large intestine. Corn-based products are valuable as part of a healthy diet.


Asunto(s)
Antioxidantes , Zea mays , Antocianinas , Fitoquímicos , Digestión
14.
Addict Biol ; 27(6): e13237, 2022 11.
Artículo en Inglés | MEDLINE | ID: mdl-36301206

RESUMEN

One of the most challenging issues in the treatment of substance use disorder, including misuse of opioids such as oxycodone, is persistent vulnerability to relapse, often triggered by cues or contexts previously associated with drug use. In rats, cue-induced craving progressively intensifies ('incubates') during withdrawal from extended-access self-administration of several classes of misused drugs, including the psychostimulants cocaine and methamphetamine. For these psychostimulants, incubation is associated with strengthening of excitatory synapses in the nucleus accumbens (NAc) through incorporation of α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors that lack the GluA2 subunit and are therefore Ca2+ -permeable (CP-AMPARs). Once CP-AMPAR upregulation occurs, their stimulation is required for expression of incubation. It is not known if a similar mechanism contributes to incubation of oxycodone craving. Using male rats, we established that incubation occurs by withdrawal day (WD) 15 and persists through WD30. Then, using cell-surface biotinylation, we found that surface levels of the AMPAR subunit GluA1 but not GluA2 are elevated in NAc core and shell of oxycodone rats on WD15, although this wanes by WD30. Next, using intra-NAc injection of the selective CP-AMPAR antagonist Naspm before a seeking test, we demonstrate that CP-AMPAR blockade in either subregion decreases oxycodone seeking on WD15 or WD30 (after incubation), but not WD1, and has no effect in saline self-administering animals. The Naspm results suggest CP-AMPARs persist in synapses through WD30 even if total cell surface levels wane. These results suggest that a common neurobiological mechanism contributes to expression of incubation of craving for oxycodone and psychostimulants.


Asunto(s)
Cocaína , Síndrome de Abstinencia a Sustancias , Ratas , Masculino , Animales , Núcleo Accumbens , Receptores AMPA/metabolismo , Ansia/fisiología , Oxicodona/farmacología , Oxicodona/metabolismo , Síndrome de Abstinencia a Sustancias/metabolismo , Ratas Sprague-Dawley , Cocaína/farmacología , Autoadministración
15.
Pharmacol Res Perspect ; 10(5): e01000, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-36045607

RESUMEN

The opioid crisis is a pressing public health issue, exacerbated by the emergence of more potent synthetic opioids, particularly fentanyl and its analogs. While competitive antagonists exist, their efficacy against synthetic opioids is largely unknown. Furthermore, due to the short durations of action of current antagonists, renarcotization remains a concern. In this study, metabolic activity was characterized for fentanyl-class opioids and common opioid antagonists using multiple in vitro systems, namely, cytochrome P450 (CYP) enzymes and hepatic spheroids, after which an in vitro-in vivo correlation was applied to convert in vitro metabolic activity to predictive in vivo intrinsic clearance. For all substrates, intrinsic hepatic metabolism was higher than the composite of CYP activities, due to fundamental differences between whole cells and single enzymatic reactions. Of the CYP isozymes investigated, 3A4 yielded the highest absolute and relative metabolism across all substrates, with largely negligible contributions from 2D6 and 2C19. Comparative analysis highlighted elevated lipophilicity and diminished CYP3A4 activity as potential considerations for the development of more efficacious opioid antagonists. Finally, antagonists with a high degree of molecular similarity exhibited comparable clearance, providing a basis for structure-metabolism relationships. Together, these results provide multiple screening criteria for early stage drug discovery involving opioid countermeasures.


Asunto(s)
Analgésicos Opioides , Antagonistas de Narcóticos , Analgésicos Opioides/metabolismo , Analgésicos Opioides/farmacología , Sistema Enzimático del Citocromo P-450/metabolismo , Fentanilo/metabolismo , Fentanilo/farmacología , Humanos , Microsomas Hepáticos/metabolismo , Antagonistas de Narcóticos/metabolismo , Antagonistas de Narcóticos/farmacología , Esferoides Celulares
16.
J Alzheimers Dis ; 90(2): 543-551, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36155511

RESUMEN

We examined amyloid-tau-neurodegeneration biomarker effects on cognition in a Southeast-Asian cohort of 84 sporadic young-onset dementia (YOD; age-at-onset <65 years) patients. They were stratified into A+N+, A- N+, and A- N- profiles via cerebrospinal fluid amyloid-ß1-42 (A), phosphorylated-tau (T), MRI medial temporal atrophy (neurodegeneration- N), and confluent white matter hyperintensities cerebrovascular disease (CVD). A, T, and CVD effects on longitudinal Mini-Mental State Examination (MMSE) were evaluated. A+N+ patients demonstrated steeper MMSE decline than A- N+ (ß = 1.53; p = 0.036; CI 0.15:2.92) and A- N- (ß = 4.68; p = 0.001; CI 1.98:7.38) over a mean follow-up of 1.24 years. Within A- N+, T- CVD+ patients showed greater MMSE decline compared to T+CVD- patients (ß = - 2.37; p = 0.030; CI - 4.41:- 0.39). A+ results in significant cognitive decline, while CVD influences longitudinal cognition in the A- sub-group.


Asunto(s)
Enfermedad de Alzheimer , Amiloidosis , Enfermedades Cardiovasculares , Disfunción Cognitiva , Demencia , Humanos , Enfermedad de Alzheimer/psicología , Amiloide , Péptidos beta-Amiloides , Biomarcadores , Cognición , Disfunción Cognitiva/diagnóstico por imagen , Demencia/diagnóstico por imagen , Proteínas tau , Persona de Mediana Edad , Edad de Inicio
17.
J Alzheimers Dis ; 87(3): 1103-1114, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35431245

RESUMEN

BACKGROUND: White matter hyperintensities (WMH) are a known risk factor for cognitive decline. While the ɛ4 allele of apolipoprotein E gene (APOE4) is another risk factor for cognitive decline, it remains unclear how APOE4 affects the relationship between WMH and cognitive decline, specifically in the prodromal stage of dementia. OBJECTIVE: To determine how APOE4 moderates the relationship between WMH and cognition in prodromal dementia. METHODS: Two-hundred-sixteen participants with prodromal dementia underwent magnetic resonance imaging (MRI), neuropsychological testing (global and domain wise), cardiovascular risk factor assessments, and APOE genotyping. Visual ratings for WMH as well as total and lobar WMH volumes were quantified. Moderation analysis was performed to determine the influence of APOE4 on the relationship between WMH and performance on global and domain-specific cognitive measures. The role of confluent and non-confluent WMH on cognition was additionally studied using logistic regression. RESULTS: APOE4 carriers (n = 49) had poorer memory and higher global WMH (10.01 mL versus 6.23 mL, p = 0.04), temporal WMH (1.17 mL versus 0.58 mL, p = 0.01), and occipital WMH (0.38mL versus 0.22 mL, p = 0.02) compared to APOE4 non-carriers (n = 167). Moderation analysis revealed that APOE4 positivity strengthened the relationship between higher global as well as lobar WMH burden and poorer episodic memory. Furthermore, APOE4 carriers with confluent WMH were 4.81 times more likely to have impaired episodic memory compared to non-confluent WMH and non-APOE carriers. CONCLUSION: The impact of WMH on memory may be strongest among APOE4 carriers. Clinicians targeting WMH would need to consider the APOE4 allele and WMH severity status to strategize cognitive interventions.


Asunto(s)
Apolipoproteína E4 , Disfunción Cognitiva , Leucoaraiosis , Trastornos de la Memoria , Memoria Episódica , Sustancia Blanca , Apolipoproteína E4/genética , Encéfalo/patología , Disfunción Cognitiva/diagnóstico por imagen , Disfunción Cognitiva/genética , Disfunción Cognitiva/patología , Demencia/diagnóstico por imagen , Demencia/genética , Demencia/patología , Humanos , Leucoaraiosis/diagnóstico por imagen , Leucoaraiosis/genética , Leucoaraiosis/patología , Imagen por Resonancia Magnética , Trastornos de la Memoria/diagnóstico por imagen , Trastornos de la Memoria/genética , Trastornos de la Memoria/patología , Pruebas Neuropsicológicas , Sustancia Blanca/diagnóstico por imagen , Sustancia Blanca/patología
18.
Foods ; 11(7)2022 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-35407070

RESUMEN

Postprandial hyperglycaemia is associated with an increased risk of type-2 diabetes. This study aims to determine the glycaemic index (GI) of three varieties of rice-based mixed meals and their effects on glycaemic variability (GV), 24 h mean glucose levels and target ranges, and rice variety preferences among overweight and obese young adults using real-time continuous glucose monitoring (rtCGM). In a randomised controlled crossover design, 14 participants (22.8 ± 4.6 years, 32.9 ± 5.8 kg/m2) were randomly assigned to receive 3 rice-based mixed meals containing 50 g of available carbohydrates (white rice meal = WRM; brown rice meal = BRM; and parboiled basmati rice meal = PBRM) and 50 g of a glucose reference drink on alternate days. GI, GV, 24 h mean glucose levels and target ranges were measured. Rice variety preferences were compared with those of baseline data and determined at the end of the study period. Results: The analysis found that PBRM was low in GI (45.35 ± 2.06), BRM medium in GI (56.44 ± 2.34), and WRM high in GI (83.03 ± 2.19). PBRM had a significantly (p < 0.05) lower 24 h mean glucose level, higher in-target 24 h glucose level percentage and non-significantly (p > 0.05) lower GV compared to WRM. Prior to observing their postprandial glucose levels generated by rtCGM, the participants preferred WRM (64.3%) over other meals, whereas this preference changed significantly (p < 0.05) at the endpoint (PBRM, 71.4%). PBRM reduced 24 h glucose level and GV of overweight and obese young adults. The rtCGM is proven to be reliable in measuring GI, while providing robust continuous glycaemic information. This may serve as an educational tool that motivates eating behaviour changes among overweight and obese young adults.

19.
Gastroenterology ; 163(1): 154-162.e3, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-35364066

RESUMEN

BACKGROUND & AIMS: Helicobacter pylori infection is considered as the most important risk factor in the pathogenesis of gastric cancer. This study aims to evaluate the long-term effects of H pylori eradication treatment on the incidence and mortality of gastric cancer among a high-risk population. METHODS: This prospective, randomized, placebo-controlled trial was conducted in a high-risk area in southern China in July 1994. A total of 1630 asymptomatic, H pylori-infected individuals were randomly assigned to receive standard triple therapy for H pylori eradication (n = 817) or placebo (n = 813), and were followed up until December 2020. The primary outcome was incidence of gastric cancer. Total and cause-specific mortalities were the secondary outcomes. RESULTS: During 26.5 years of follow-up, 21 participants (2.57%) in the treatment arm and 35 (4.31%) in the placebo arm were diagnosed with gastric cancer. Participants receiving H pylori treatment had a lower incidence of gastric cancer compared with their placebo counterparts (hazard ratio [HR], 0.57; 95% CI, 0.33-0.98). More obvious risk reduction was observed among those without premalignant gastric lesions (HR, 0.37; 95% CI, 0.15-0.95) and those without dyspepsia symptoms at baseline (HR, 0.44; 95% CI, 0.21-0.94). Furthermore, compared with 32 cases of gastric cancer observed among 527 participants with persistent H pylori infection in the placebo group, only 16 were identified in 625 subjects with successful eradication in the treatment group (HR, 0.46; 95% CI, 0.26-0.83). However, there were no statistically significant differences for any mortality end points between the 2 groups. CONCLUSIONS: Eradication of H pylori might confer a long-term protection against gastric cancer in high-risk populations, especially for infected individuals without precancerous gastric lesions at baseline.


Asunto(s)
Infecciones por Helicobacter , Helicobacter pylori , Lesiones Precancerosas , Neoplasias Gástricas , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Quimioterapia Combinada , Estudios de Seguimiento , Infecciones por Helicobacter/complicaciones , Infecciones por Helicobacter/diagnóstico , Infecciones por Helicobacter/tratamiento farmacológico , Humanos , Lesiones Precancerosas/diagnóstico , Lesiones Precancerosas/tratamiento farmacológico , Lesiones Precancerosas/epidemiología , Estudios Prospectivos , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/epidemiología , Neoplasias Gástricas/prevención & control
20.
J Alzheimers Dis ; 87(1): 479-488, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35275537

RESUMEN

BACKGROUND: Young-onset cognitive disorders (YOCD) often manifests with complex and atypical presentations due to underlying heterogenous pathologies. Therefore, a biomarker-based evaluation will allow for timely diagnosis and definitive management. OBJECTIVE: Here, we evaluated the safety and usefulness of cerebrospinal fluid (CSF) sampling through lumbar puncture (LP) in YOCD patients in a tertiary clinical setting. METHODS: Patients with mild cognitive impairment (MCI) and mild dementia with age of onset between 45-64 years were evaluated. Patients underwent magnetic resonance imaging and their medial temporal lobe atrophy (MTA) was rated. LP side-effects and the impact of the CSF findings on diagnosis and management were analyzed. RESULTS: 142 patients (53 (37.32%) MCI, 51 (35.92%) dementia of the Alzheimer's disease [DAT] type, and 38 (26.76%) non-AD type dementia) who underwent LP between 2015 to 2021 were analyzed. Using post-LP results and MTA ratings, 74 (52.11%) patients met the AT(N) criteria for AD. 56 (39.44%) patients (28 out of 53 (50.0%) MCI, 12 out of 51 (21.43%) DAT, and 16 out of 38 (28.57%) non-AD dementia) had a change in diagnosis following LP. 13 (9.15%) patients developed side-effects post-LP (11 (84.62%) patients had headache, 1 (7.69%) patient had backache, and 1 (7.69%) patient had headache and backache). 32 (22.54%) patients had a change in management post-LP, 24 (75.0%) had medication changes, 10 (31.30%) had referrals to other specialists, and 3 (9.40%) was referred for clinical trial with disease modifying interventions. CONCLUSION: LP is well-tolerated in YOCD and can bring about relevant clinical decisions with regards to the diagnosis and management of this complex clinical condition.


Asunto(s)
Enfermedad de Alzheimer , Disfunción Cognitiva , Demencia , Humanos , Enfermedad de Alzheimer/diagnóstico , Péptidos beta-Amiloides/líquido cefalorraquídeo , Atrofia , Biomarcadores/líquido cefalorraquídeo , Cognición , Disfunción Cognitiva/diagnóstico , Disfunción Cognitiva/patología , Disfunción Cognitiva/terapia , Demencia/diagnóstico , Progresión de la Enfermedad , Cefalea , Punción Espinal/efectos adversos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA