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1.
Kidney Int Rep ; 9(5): 1228-1235, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38707822

RESUMEN

Introduction: Prematurity is associated with incomplete nephrogenesis and an increased incidence of acute kidney injury, that may increase the risk of future kidney disease, including hypertension, proteinuria and reduced glomerular filtration rate. The aim of this study was to evaluate the risk of hypertension or proteinuria in adolescents born prematurely or small for gestational age, in a nationwide cohort. Methods: The study cohort included potential recruits examined in the Israel Defense Forces (IDF) medical facilities, between November 2005 and October 2018. Clinical and anthropometric data, including blood pressure (BP) measurement, were retrieved from the IDF medical files. Adolescents born between January 1993 and December 2000 had additional data on gestational age at birth, retrieved from the Israeli Ministry of Health database. Results: The study cohort included 513,802 participants, aged 17.3 ± 0.9 years, of whom 48,994 had gestational age data. Adolescents born as very preterm, as extremely preterm infants, those born with very low birthweight (VLBW), or with extremely low birthweight (ELBW) had higher incidence of hypertensive-range BP (55%, 47%, 19% and 12%, respectively). No significant association between birthweight (BW) adjusted to gestational age and hypertension was observed. Within the overweight and obese adolescents, those born with VLBW and ELBW, had further increased hypertensive-range BP rate. Proteinuria was diagnosed in 0.33% of the study cohort, with no significant difference between BW or gestational age categories. Conclusion: Adolescents born with VLBW or as significant preterm were associated with high BP and should be monitored for hypertension development and its potential complications.

2.
Alzheimers Dement (N Y) ; 10(1): e12446, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38356475

RESUMEN

INTRODUCTION: In addition to the accumulation of amyloid plaques and neurofibrillary tangles, the presence of excess neural activity is a pathological hallmark of Alzheimer's disease (AD) and a prognostic indicator for progression of AD pathology and clinical/cognitive worsening in mild cognitive impairment due to Alzheimer's disease (MCI due to AD). The HOPE4MCI clinical study tested the efficacy of a therapeutic with demonstrated ability to normalize heightened neural activity in the hippocampus in a randomized controlled trial of 78 weeks duration in patients with MCI due to AD. METHODS: One hundred and sixty-four participants were randomized to placebo (n = 83) or AGB101 (n = 81), an extended-release formulation of low dose (220 mg) levetiracetam. The primary endpoint was the change in Clinical Dementia Rating Scale Sum of Boxes score (CDR-SB) comparing follow up at 18 months to baseline. The goal of the primary efficacy analysis was to estimate the difference between the AGB101 and placebo arms in the mean change of the primary endpoint. RESULTS: The mean change in CDR-SB was estimated to be 1.12 (95% confidence interval [CI]: 0.66, 1.69) for the AGB101 arm and 1.22 (95% CI: 0.75, 1.78) for the placebo arm. The estimated difference between arms is -0.10 (95% CI: -0.85, 0.58), which was not statistically significant. In a prespecified analysis, the difference was -0.45 (95% CI: -1.43, 0.53) for ApoE-4 noncarriers and -0.10 (95% CI: -0.92, 0.72) for apolipoprotein E (ApoE)-4 carriers. DISCUSSION: The possibility that ApoE-4 carriers and noncarriers will respond differently to therapeutic intervention is consistent with recently reported findings from biologics and the present results show further testing of AGB101 in patients with MCI due to AD who are noncarriers of the ApoeE-4 allele is warranted. Conclusions from the HOPE4MCI study are limited primarily due to the small sample size and results can only be regarded as a guide to future research.

3.
J Alzheimers Dis ; 96(3): 1051-1058, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38007669

RESUMEN

BACKGROUND: Alzheimer's disease (AD) is a debilitating condition that is widely known to adversely affect gray matter (GM) and white matter (WM) tracts within the brain. Recently, precision medicine has shown promise in alleviating the clinical and gross morphological trajectories of patients with AD. However, regional morphological changes have not yet been adequately characterized. OBJECTIVE: Investigate regional morphological responses to a precision medicine-guided intervention with regards to white and gray matter in AD and mild cognitive impairment (MCI). METHODS: Clinical and neuroimaging data were compiled over a 9-month period from 25 individuals who were diagnosed with AD or MCI receiving individualized treatment plans. Structural T1-weighted MRI scans underwent segmentation and volumetric quantifications via Neuroreader. Longitudinal changes were calculated via annualized percent change of WM or GM ratios. RESULTS: Montreal Cognitive Assessment scores (p < 0.001) and various domains of the Computerized Neurocognitive Screening Vital Signs significantly improved from baseline to 9-month follow-up. There was regional variability in WM and GM atrophy or hypertrophy, but none of these observed changes were statistically significant after correction for multiple comparisons.


Asunto(s)
Enfermedad de Alzheimer , Disfunción Cognitiva , Sustancia Blanca , Humanos , Sustancia Gris/diagnóstico por imagen , Sustancia Gris/patología , Enfermedad de Alzheimer/diagnóstico por imagen , Enfermedad de Alzheimer/terapia , Medicina de Precisión , Imagen por Resonancia Magnética/métodos , Encéfalo/diagnóstico por imagen , Encéfalo/patología , Sustancia Blanca/diagnóstico por imagen , Sustancia Blanca/patología , Disfunción Cognitiva/diagnóstico por imagen , Disfunción Cognitiva/patología , Atrofia/patología
4.
J Alzheimers Dis ; 96(2): 429-437, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37807782

RESUMEN

The neurodegenerative disease field has enjoyed extremely limited success in the development of effective therapeutics. One potential reason is the lack of disease models that yield accurate predictions and optimal therapeutic targets. Standard clinical trials have pre-determined a single treatment modality, which may be unrelated to the primary drivers of neurodegeneration. Recent proof-of-concept clinical trials using a precision medicine approach suggest a new model of Alzheimer's disease (AD) as a chronic innate encephalitis that creates a network insufficiency. Identifying and addressing the multiple potential contributors to cognitive decline for each patient may represent a more effective strategy. Here we review the rationale for a precision medicine approach in prevention and treatment of cognitive decline associated with AD. Results and implications from recent proof-of-concept clinical trials are presented. Randomized controlled trials, with much larger patient numbers, are likely to be significant to establishing precision medicine protocols as a standard of care for prevention and treatment of cognitive decline. Furthermore, combining this approach with the pharmaceutical approach offers the potential for enhanced outcomes. However, incorporating precision medicine approaches into everyday evaluation and care, as well as future clinical trials, would require fundamental changes in trial design, IRB considerations, funding considerations, laboratory evaluation, personalized treatment plans, treatment teams, and ultimately in reimbursement guidelines. Nonetheless, precision medicine approaches to AD, based on a novel model of AD pathophysiology, offer promise that has not been realized to date with monotherapeutic approaches.


Asunto(s)
Enfermedad de Alzheimer , Disfunción Cognitiva , Enfermedades Neurodegenerativas , Humanos , Enfermedad de Alzheimer/tratamiento farmacológico , Medicina de Precisión/métodos
5.
World J Urol ; 41(6): 1641-1646, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-37184690

RESUMEN

PURPOSE: To analyze urinary stone composition in Israel and assess the effects of key demographic parameters (gender, age, socioeconomic status, ethnicity, medical history and geographic region) on stone composition. METHODS: A retrospective review was conducted of stone analysis of 10,633 patients from an HMO Israeli database analyzed by a central laboratory from 2014 to 2019 and subjected to Fourier-transform infrared spectroscopy. Associations between stone composition and different demographic parameters were determined using the Chi-square test. RESULTS: Calcium oxalate (CaOx) monohydrate accounted for 51.9% of the stones. Of the total sample, 5776 stones had one single component (54%), whereas 4857 (46%) had mixed components. Men had a higher frequency of CaOx stones (89.6% vs. 85.6%), whereas women had a higher frequency of calcium phosphate, infection, and cystine stones (27.2%, 17.7%, and 0.9% vs. 17.2%, 7.5%, and 0.5%, respectively). Cystine stones were more abundant in Arabs (1.2% vs. 0.5% in the Jewish population). Lower socioeconomic status was associated with a higher prevalence of calcium phosphate, uric acid, and infection stones and a lower prevalence of CaOx stones. Uric acid stones were associated with medical conditions such as diabetes, hypertension, ischemic heart disease, and obesity (28.3%, 24.9%, 25.7%, and 22.6% vs. 9.6%, 8.4%, 12.3%, and 10.3%, respectively). CONCLUSIONS: Stone types were highly influenced by patients' demographics. COM was the most common stone component in either pure or complex form. UA stone prevalence was found to increase with age and was associated with medical conditions such as diabetes, hypertension, ischemic heart disease, and obesity.


Asunto(s)
Diabetes Mellitus , Hipertensión , Cálculos Renales , Cálculos Urinarios , Masculino , Humanos , Femenino , Israel/epidemiología , Oxalato de Calcio/análisis , Ácido Úrico/análisis , Cistina/análisis , Cálculos Renales/epidemiología , Cálculos Renales/química , Cálculos Urinarios/química , Fosfatos de Calcio/análisis , Obesidad , Prevalencia
6.
N Engl J Med ; 388(17): 1631-1632, 2023 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-37099355
7.
J Am Coll Health ; : 1-10, 2023 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-36749870

RESUMEN

Objective: The study aims to capture the emotional challenges faced by international students due to the changes in U.S. visa regulations during the COVID-19 outbreak. Participants: 165 international students from University of Florida participated in the study. Methods: We conducted a cross-sectional online survey using previously validated questionnaire tools (PHQ-9 and GAD-7). The collected data was quantitatively analyzed through different statistical approaches, including ANOVA, Independent Sample t-Test, and Binary Logistic Regression. Results: 18.8% of our study sample had a moderately severe to severe depressive status, and 20.6% of the study sample had severe anxiety. Additionally, there was a statistically significant difference in the depression and anxiety scores based on gender. Conclusions: Our findings addressed the importance of taking serious measures when emotionally impactful political issues arise to prevent the development of mental illnesses among international students at U.S. institutions of higher education.

8.
Clin Nurs Res ; 32(4): 699-704, 2023 05.
Artículo en Inglés | MEDLINE | ID: mdl-36633042

RESUMEN

The purpose of this article is to describe the protocol development, feasibility, and lessons learned in the postal mail delivery of sleep monitoring devices to study participants. The original study protocol included four in-person visits with distribution of a sleep monitoring device (Actiwatch) and return of the Actiwatch via the postal service in a self-addressed, stamped envelope. The COVID-19 pandemic limited in-person research contact thus requiring a remote study protocol for application and return of the Actiwatches using postal delivery. While there were postal delivery and return challenges, the overall return rate of 94.4% confirmed remote protocol feasibility. Key lessons learned were: consistent and frequent communication via telephone calls and/or text; confirming required postage; and use of package tracking labels. All these strategies contributed to successful postal delivery/return and concomitantly decreased the potential loss of data and valuable research equipment.


Asunto(s)
COVID-19 , Pandemias , Humanos , Encuestas y Cuestionarios , Polisomnografía , COVID-19/epidemiología , Comunicación
9.
Clin Pediatr (Phila) ; 62(8): 824-829, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-36660959

RESUMEN

Spice consumption, along with other environmental factors, can contribute to pediatric lead poisoning. Although public health efforts have increased awareness of contamination of spices, false assumptions regarding the safety of home-prepared spices have emerged. Here, we present the clinical features, family beliefs, and environmental toxicology of 3 spice-associated pediatric lead poisoning cases.


Asunto(s)
Intoxicación por Plomo , Especias , Humanos , Niño , Intoxicación por Plomo/etiología
10.
Eur Heart J Qual Care Clin Outcomes ; 9(3): 207-215, 2023 04 26.
Artículo en Inglés | MEDLINE | ID: mdl-36694945

RESUMEN

AIMS: Many patients with suspected non-ST-elevation (NSTE) acute coronary syndromes (ACS) are admitted, even those with initial high-sensitivity cardiac troponins (hs-cTn) values who meet rapid rule-out criteria for myocardial infarction (MI). We examined the clinical outcomes, resource utilization, and diagnostic yield of suspected NSTE-ACS patients, who presented with hs-cTnT values meeting these criteria but were nevertheless hospitalized. METHODS AND RESULTS: Applying the 2020 European Society of Cardiology (ESC) rapid rule-out MI criteria, we identified consecutive patients with an initial value of hs-cTnT <5 ng/L or an initial value of ≥5 ng/L but <14 ng/L (99th percentile) and a small increment in a subsequent test, who were nevertheless admitted. The majority (85.4%) of patients presented to the emergency department (ED) with suspected NSTE-ACS had an initial hs-cTnT <99th percentile. We examined 3775 admitted patients out of 11 477 patients who were triaged and met MI rule-out criteria. Only 0.32% (12 patients) of admitted patients experienced index MI or overall death within 30 days. Resource utilization in terms of ED stay, hospital stay, noninvasive and invasive tests was substantial, yet revascularization was uncommon (2.5%). Multivariate adjustment for age, gender, and baseline cardiovascular risk factors demonstrates similar survival of admitted vs. discharged patients (P = 0.88). Initial hs-cTnT even below the 99th percentile provided a prognostic stratification for long term mortality. CONCLUSION: Our findings support a policy of ED discharge of suspected NSTE-ACS patients meeting rapid MI rule-out criteria and subsequent ambulatory evaluation, sparing resource-consuming admissions. In-hospital and ensuing prognosis were better with lower initial hs-cTnT values.


Asunto(s)
Síndrome Coronario Agudo , Infarto del Miocardio , Humanos , Síndrome Coronario Agudo/diagnóstico , Troponina T , Biomarcadores , Hospitales
11.
N Engl J Med ; 388(1): 9-21, 2023 01 05.
Artículo en Inglés | MEDLINE | ID: mdl-36449413

RESUMEN

BACKGROUND: The accumulation of soluble and insoluble aggregated amyloid-beta (Aß) may initiate or potentiate pathologic processes in Alzheimer's disease. Lecanemab, a humanized IgG1 monoclonal antibody that binds with high affinity to Aß soluble protofibrils, is being tested in persons with early Alzheimer's disease. METHODS: We conducted an 18-month, multicenter, double-blind, phase 3 trial involving persons 50 to 90 years of age with early Alzheimer's disease (mild cognitive impairment or mild dementia due to Alzheimer's disease) with evidence of amyloid on positron-emission tomography (PET) or by cerebrospinal fluid testing. Participants were randomly assigned in a 1:1 ratio to receive intravenous lecanemab (10 mg per kilogram of body weight every 2 weeks) or placebo. The primary end point was the change from baseline at 18 months in the score on the Clinical Dementia Rating-Sum of Boxes (CDR-SB; range, 0 to 18, with higher scores indicating greater impairment). Key secondary end points were the change in amyloid burden on PET, the score on the 14-item cognitive subscale of the Alzheimer's Disease Assessment Scale (ADAS-cog14; range, 0 to 90; higher scores indicate greater impairment), the Alzheimer's Disease Composite Score (ADCOMS; range, 0 to 1.97; higher scores indicate greater impairment), and the score on the Alzheimer's Disease Cooperative Study-Activities of Daily Living Scale for Mild Cognitive Impairment (ADCS-MCI-ADL; range, 0 to 53; lower scores indicate greater impairment). RESULTS: A total of 1795 participants were enrolled, with 898 assigned to receive lecanemab and 897 to receive placebo. The mean CDR-SB score at baseline was approximately 3.2 in both groups. The adjusted least-squares mean change from baseline at 18 months was 1.21 with lecanemab and 1.66 with placebo (difference, -0.45; 95% confidence interval [CI], -0.67 to -0.23; P<0.001). In a substudy involving 698 participants, there were greater reductions in brain amyloid burden with lecanemab than with placebo (difference, -59.1 centiloids; 95% CI, -62.6 to -55.6). Other mean differences between the two groups in the change from baseline favoring lecanemab were as follows: for the ADAS-cog14 score, -1.44 (95% CI, -2.27 to -0.61; P<0.001); for the ADCOMS, -0.050 (95% CI, -0.074 to -0.027; P<0.001); and for the ADCS-MCI-ADL score, 2.0 (95% CI, 1.2 to 2.8; P<0.001). Lecanemab resulted in infusion-related reactions in 26.4% of the participants and amyloid-related imaging abnormalities with edema or effusions in 12.6%. CONCLUSIONS: Lecanemab reduced markers of amyloid in early Alzheimer's disease and resulted in moderately less decline on measures of cognition and function than placebo at 18 months but was associated with adverse events. Longer trials are warranted to determine the efficacy and safety of lecanemab in early Alzheimer's disease. (Funded by Eisai and Biogen; Clarity AD ClinicalTrials.gov number, NCT03887455.).


Asunto(s)
Enfermedad de Alzheimer , Anticuerpos Monoclonales Humanizados , Nootrópicos , Humanos , Actividades Cotidianas , Enfermedad de Alzheimer/diagnóstico por imagen , Enfermedad de Alzheimer/tratamiento farmacológico , Péptidos beta-Amiloides/líquido cefalorraquídeo , Anticuerpos Monoclonales Humanizados/efectos adversos , Anticuerpos Monoclonales Humanizados/farmacología , Anticuerpos Monoclonales Humanizados/uso terapéutico , Cognición/efectos de los fármacos , Método Doble Ciego , Nootrópicos/efectos adversos , Nootrópicos/farmacología , Nootrópicos/uso terapéutico
12.
Mol Genet Metab Rep ; 33: 100928, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36281443

RESUMEN

Introduction: Several abnormalities of porphyrin metabolism leading to Porphyria Cutanea Tarda (PCT) have been described in early studies of End Stage Renal Disease (ESRD) patients, with a reported prevalence of 5-18%. We aimed to evaluate porphyrin levels and correlation to skin manifestations in modern dialysis era. Methods: The study cohort included adult hemodialysis patients from a single center tertiary medical center. All patients underwent a full skin examination, completed the Dermatology Life Quality Index questioner, and provided a blood sample for porphyrin levels assessment. Results: A total of 94 adult hemodialysis patients were recruited to the study. No clinical PCT was diagnosed. Porphyrin levels did not correlate with any clinical or dialysis quality parameters. Conclusions: In modern hemodialysis era, possibly due to improved porphyrins' metabolism and dialysis removal, PCT is much less prevalent among hemodialysis patients than previously reported in the past.

13.
Infect Dis (Lond) ; 54(12): 846-851, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-35975662

RESUMEN

INTRODUCTION: Alpha 1 antitrypsin (A1AT) is the major human blood serine protease inhibitor. Transmembrane serine protease 2 (TMPRSS2), which is crucial for SARS-CoV-2 cell entry, is inhibited by A1AT. Therefore, we hypothesized that individuals with diminished levels of A1AT may be more prone to SARS-CoV-2 infection and severe COVID-19 disease. Our aim in this study was to evaluate the level of A1AT in hospitalized COVID-19 patients in comparison to hospitalized patients with non-COVID-19 pneumonia. METHODS: We conducted an observational prospective study between October 2020 and April 2021 in Rabin Medical Centre in Israel. A1AT levels were measured from the routine serum samples of hospitalized patients with COVID-19 and non-COVID-19 pneumonia (control group). The primary outcome was A1AT level, secondary outcomes were clinical outcomes and predictors of morality. RESULTS: Overall, 145 patients were included in the study, 98 in the COVID-19 group and 47 in the control group. The median A1AT level was 222 mg/dL (interquartile range (IQR) 188-269) and 258 mg/dL (IQR 210-281) in the COVID-19 and control groups, respectively (p = .045). Multivariate analysis for independent risk factors for mortality among COVID-19 patients showed that diabetes mellitus (p = .02), older age (p = .04), and high A1AT levels (p = .04) were all associated with increased mortality. CONCLUSION: Patients admitted due to severe COVID-19 had lower A1AT levels in comparison to patients admitted due to non-COVID pneumonia. This observation may suggest an association between mildly diminished A1AT and higher risk of SARS-CoV-2 infection with severe COVID-19 disease.


Asunto(s)
COVID-19 , Neumonía , Deficiencia de alfa 1-Antitripsina , Humanos , alfa 1-Antitripsina , SARS-CoV-2 , Estudios Prospectivos , Inhibidores de Serina Proteinasa , Serina Proteasas
14.
J Alzheimers Dis ; 88(4): 1411-1421, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35811518

RESUMEN

BACKGROUND: Effective therapeutics for Alzheimer's disease are needed. However, previous clinical trials have pre-determined a single treatment modality, such as a drug candidate or therapeutic procedure, which may be unrelated to the primary drivers of the neurodegenerative process. Therefore, increasing data set size to include the potential contributors to cognitive decline for each patient, and addressing the identified potential contributors, may represent a more effective strategy. OBJECTIVE: To determine whether a precision medicine approach to Alzheimer's disease and mild cognitive impairment is effective enough in a proof-of-concept trial to warrant a larger, randomized, controlled clinical trial. METHODS: Twenty-five patients with dementia or mild cognitive impairment, with Montreal Cognitive Assessment (MoCA) scores of 19 or higher, were evaluated for markers of inflammation, chronic infection, dysbiosis, insulin resistance, protein glycation, vascular disease, nocturnal hypoxemia, hormone insufficiency or dysregulation, nutrient deficiency, toxin or toxicant exposure, and other biochemical parameters associated with cognitive decline. Brain magnetic resonance imaging with volumetrics was performed at baseline and study conclusion. Patients were treated for nine months with a personalized, precision medicine protocol, and cognition was assessed at t = 0, 3, 6, and 9 months. RESULTS: All outcome measures revealed improvement: statistically significant improvement in MoCA scores, CNS Vital Signs Neurocognitive Index, and Alzheimer's Questionnaire Change score were documented. No serious adverse events were recorded. MRI volumetrics also improved. CONCLUSION: Based on the cognitive improvements observed in this study, a larger, randomized, controlled trial of the precision medicine therapeutic approach described herein is warranted.


Asunto(s)
Enfermedad de Alzheimer , Disfunción Cognitiva , Enfermedad de Alzheimer/complicaciones , Enfermedad de Alzheimer/diagnóstico por imagen , Enfermedad de Alzheimer/terapia , Cognición , Disfunción Cognitiva/diagnóstico , Humanos , Proyectos Piloto , Medicina de Precisión
15.
Front Aging Neurosci ; 14: 862362, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35517054

RESUMEN

The landscape of therapeutics for mild cognitive impairment and dementia is quite limited. While many single-agent trials of pharmaceuticals have been conducted, these trials have repeatedly been unable to show improvement in cognition. It is hypothesized that because Alzheimer's, like many other chronic illnesses, is not a monogenic illness, but is instead caused by the downstream effects of an individual's genetic variants interacting with each other, the environment, and lifestyle, that improving outcomes will require a personalized, precision medicine approach. This approach requires identifying and then addressing contributing genomic and other factors specific to each individual in a simultaneous fashion. Until recently, the utility of genomics as part of clinical decision-making for Alzheimer's and cognitive decline has been limited by the lack of availability of a genomic platform designed specifically to evaluate factors contributing to cognitive decline and how to respond to these factors The clinical decision support (CDS) platform used in the cases presented focuses on common variants that relate to topics including, but not limited to brain inflammation, amyloid processing, nutrient carriers, brain ischemia, oxidative stress, and detoxification pathways. Potential interventions based on the scientific literature were included in the CDS, but the final decision on what interventions to apply were chosen by each patient's physician. Interventions included supplements with "generally regarded as safe (GRAS)" rating, along with targeted diet and lifestyle modifications. We hypothesize that a personalized genomically targeted approach can improve outcomes for individuals with mild cognitive impairment who are at high risk of Alzheimer's. The cases presented in this report represent a subset of cases from three physicians' offices and are meant to provide initial proof of concept data demonstrating the efficacy of this method and provide support for this hypothesis. These patients were at elevated risk for Alzheimer's due to their apolipoprotein E ε4 status. While further prospective and controlled trials need to be done, initial case reports are encouraging and lend support to this hypothesis of the benefit of a genomically targeted personalized medicine approach to improve outcomes in individuals with cognitive decline who are at high risk for Alzheimer's.

16.
Stem Cell Reports ; 17(6): 1334-1350, 2022 06 14.
Artículo en Inglés | MEDLINE | ID: mdl-35594859

RESUMEN

Cell cycle and differentiation decisions are linked; however, the underlying principles that drive these decisions are unclear. Here, we combined cell-cycle reporter system and single-cell RNA sequencing (scRNA-seq) profiling to study the transcriptomes of embryonic stem cells (ESCs) in the context of cell-cycle states and differentiation. By applying retinoic acid, to G1 and G2/M ESCs, we show that, while both populations can differentiate toward epiblast stem cells (EpiSCs), only G2/M ESCs could differentiate into extraembryonic endoderm cells. We identified Esrrb, a pluripotency factor that is upregulated during G2/M, as a driver of extraembryonic endoderm stem cell (XEN) differentiation. Furthermore, enhancer chromatin states based on wild-type (WT) and ESRRB knockout (KO) ESCs show association of ESRRB with XEN poised enhancers. G1 cells overexpressing Esrrb allow ESCs to produce XENs, while ESRRB-KO ESCs lost their potential to differentiate into XEN. Overall, this study reveals a vital link between Esrrb and cell-cycle states during the exit from pluripotency.


Asunto(s)
Células Madre Embrionarias , Endodermo , Ciclo Celular/genética , Diferenciación Celular/genética , Células Madre Embrionarias/metabolismo , Estratos Germinativos
17.
Opt Express ; 30(9): 15512-15523, 2022 Apr 25.
Artículo en Inglés | MEDLINE | ID: mdl-35473269

RESUMEN

Label free and remote action potential detection in neurons can be of great importance in the neuroscience research field. This paper presents a novel label free imaging modality based on the detection of temporal vibrations of speckle patterns illuminating the sample. We demonstrated the feasibility of detecting action potentials originating from spontaneous and stimulated activity in cortical cell culture. The spatiotemporal vibrations of isolated cortical cells were extracted by illuminating the culture with a laser beam while the vibrations of the random back scattered secondary speckle patterns are captured by a camera. The postulated action potentials were estimated following correlation-based analysis on the captured vibrations, where the variance deviation of the signal from a Gaussian distribution is directly associated with the action potential events. The technique was validated in a series of experiments in which the optical signals were acquired concurrently with microelectrode array (MEA) recordings. Our results demonstrate the ability of detecting action potential events in mammalian cells remotely via extraction of acoustic vibrations.


Asunto(s)
Acústica , Vibración , Potenciales de Acción , Animales , Mamíferos , Neuronas , Óptica y Fotónica
18.
Int J Mol Sci ; 23(4)2022 Feb 16.
Artículo en Inglés | MEDLINE | ID: mdl-35216282

RESUMEN

Molecular biology combined with genomics can be a powerful tool for developing potential intervention strategies for improving outcomes in children with autism spectrum disorders (ASD). Monogenic etiologies rarely cause autism. Instead, ASD is more frequently due to many polygenic contributing factors interacting with each other, combined with the epigenetic effects of diet, lifestyle, and environment. One limitation of genomics has been identifying ways of responding to each identified gene variant to translate the information to something clinically useful. This paper will illustrate how understanding the function of a gene and the effects of a reported variant on a molecular level can be used to develop actionable and targeted potential interventions for a gene variant or combinations of variants. For illustrative purposes, this communication highlights a specific genomic variant, SHANK3. The steps involved in developing molecularly genomically targeted actionable interventions will be demonstrated. Cases will be shared to support the efficacy of this strategy and to show how clinicians utilized these targeted interventions to improve ASD-related symptoms significantly. The presented approach demonstrates the utility of genomics as a part of clinical decision-making.


Asunto(s)
Trastorno del Espectro Autista , Trastorno Autístico , Trastornos de los Cromosomas , Trastorno del Espectro Autista/genética , Trastorno del Espectro Autista/terapia , Trastorno Autístico/genética , Niño , Deleción Cromosómica , Trastornos de los Cromosomas/genética , Humanos , Proteínas del Tejido Nervioso/genética
19.
Nutrients ; 13(12)2021 Dec 14.
Artículo en Inglés | MEDLINE | ID: mdl-34960023

RESUMEN

BACKGROUND: Radical cystectomy (RC) is the standard treatment for muscle invasive bladder cancer (MIBC). Neoadjuvant chemotherapy (NAC) is associated with improved patient survival. The impact of NAC on nutritional status is understudied, while the association between malnutrition and poor surgical outcomes is well known. This study aims to examine the association between NAC, nutritional status impairment, and post-operative morbidity. MATERIALS AND METHODS: We included MIBC patients who underwent RC and received NAC from multiple academic centers in Israel. Cross-sectional imaging was used to measure the psoas muscle area and normalized it by height (smooth muscle index, SMI). Pre- and post-NAC SMI difference was calculated (represents nutritional status change). The primary outcomes were post-RC ileus, infection, and a composite outcome of any complication. Logistic regression models were fit to identify independent predictors of the outcomes. RESULTS: Ninety-one patients were included in the study. The median SMI change was -0.71 (-1.58, -0.06) cm2/m2. SMI decline was significantly higher in patients with post-RC complications (-18 vs. -203, p < 0.001). SMI change was an independent predictor of all complications, ileus, infection, and other complications. The accuracy of SMI change for predicting all complications, ileus, infection, and other complications was 0.85, 0.87, 0.75, and 0.86, respectively. CONCLUSIONS: NAC-related nutritional deterioration is associated with increased risk of complications after RC. Our results hint towards the need for nutritional intervention during NAC prior to RC.


Asunto(s)
Antineoplásicos/efectos adversos , Cistectomía , Terapia Neoadyuvante/efectos adversos , Estado Nutricional/efectos de los fármacos , Neoplasias de la Vejiga Urinaria/tratamiento farmacológico , Neoplasias de la Vejiga Urinaria/cirugía , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias , Estudios Retrospectivos
20.
J Pers Med ; 11(7)2021 Jun 24.
Artículo en Inglés | MEDLINE | ID: mdl-34202628

RESUMEN

Considerable evidence is emerging that Autism Spectrum Disorder (ASD) is most often triggered by a range of different genetic variants that interact with environmental factors such as exposures to toxicants and changes to the food supply. Up to 80% of genetic variations that contribute to ASD found to date are neither extremely rare nor classified as pathogenic. Rather, they are less common single nucleotide polymorphisms (SNPs), found in 1-15% or more of the population, that by themselves are not disease-causing. These genomic variants contribute to ASD by interacting with each other, along with nutritional and environmental factors. Examples of pathways affected or triggered include those related to brain inflammation, mitochondrial dysfunction, neuronal connectivity, synapse formation, impaired detoxification, methylation, and neurotransmitter-related effects. This article presents information on four case study patients that are part of a larger ongoing pilot study. A genomic clinical decision support (CDS) tool that specifically focuses on variants and pathways that have been associated with neurodevelopmental disorders was used in this pilot study to help develop a targeted, personalized prevention and intervention strategy for each child. In addition to an individual's genetic makeup, each patient's personal history, diet, and environmental factors were considered. The CDS tool also looked at genomic SNPs associated with secondary comorbid ASD conditions including attention deficit hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), anxiety, and pediatric autoimmune neuropsychiatric disorder associated with streptococcal infections/pediatric acute-onset neuropsychiatric syndrome (PANDAS/PANS). The interpreted genomics tool helped the treating clinician identify and develop personalized, genomically targeted treatment plans. Utilization of this treatment approach was associated with significant improvements in socialization and verbal skills, academic milestones and intelligence quotient (IQ), and overall increased ability to function in these children, as measured by autism treatment evaluation checklist (ATEC) scores and parent interviews.

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