ABSTRACT
The extracellular matrix is fundamental in order to maintain normal function in many organs such as the blood vessels, heart, liver, or bones. When organs fail or experience injury, tissue engineering and regenerative medicine elicit the production of constructs resembling the native extracellular matrix, supporting organ restoration and function. In this regard, is it possible to optimize structural characteristics of nanofiber scaffolds obtained by the electrospinning technique? This study aimed to produce partially degraded collagen (gelatin) nanofiber scaffolds, using the electrospinning technique, with optimized parameters rendering different morphological characteristics of nanofibers, as well as assessing whether the resulting scaffolds are suitable to integrate primary human endothelial progenitor cells, obtained from peripheral blood with further in vitro cell expansion. After different assay conditions, the best nanofiber morphology was obtained with the following electrospinning parameters: 15 kV, 0.06 mL/h, 1000 rpm and 12 cm needle-to-collector distance, yielding an average nanofiber thickness of 333 ± 130 nm. Nanofiber scaffolds rendered through such electrospinning conditions were suitable for the integration and proliferation of human endothelial progenitor cells.
ABSTRACT
It is well known that cardiovascular diseases (CVD) are a major contributor of death in systemic lupus erythematosus (SLE) as well in other rheumatic illness. In the last decades, there has been a growing development of different methodologies with the purpose of early detection of CVD. OBJECTIVE: The aim of this study is to correlate the usefulness of subclinical parameters of vascular aging and QRISK 3-2017 score for early detection of CVD in SLE. METHODS: Clinical assessment including systemic lupus erythematosus disease activity index (SLEDAI) and systemic lupus international collaborating clinics / american college of rheumatology damage index (SLICC/ACR DI), laboratory measurements, carotid ultrasound examination, carotid intima media thickness (cIMT) measurement, carotid distention and diameter analysis, arterial stiffness measurement measured by tonometry and QRISK 3-2017 were done. All results were analyzed by SPSS 24 software. RESULTS: We observed correlation between QRISK3 and mean cIMT (rs = 0.534, P < 0.001), PWV (rs = 0.474, P < 0.001), cfPWV (rs = 0.569, P < 0.001) and distensibility (rs = -0.420, P = 0.006). Consistent with above, SLE patients in middle and high risk QRISK 3-2017 showed increased arterial stiffness versus low risk group. CONCLUSIONS: We encourage to the rheumatology community to assess cardiovascular risk in SLE patients with QRISK 3-2017 risk calculator as an alternative method at the outpatient clinic along a complete cardiovascular evaluation when appropriate.
Subject(s)
Lupus Erythematosus, Systemic/complications , Lupus Erythematosus, Systemic/diagnosis , Risk Assessment/methods , Adult , Arteriosclerosis/diagnosis , Cardiovascular Diseases/diagnosis , Cardiovascular Diseases/etiology , Carotid Intima-Media Thickness , Decision Support Techniques , Female , Humans , Male , Middle Aged , Prognosis , Rheumatology , Risk Factors , Vascular Stiffness/physiologyABSTRACT
Despite the suggestion that impulsivity plays a central role in the transfer from a recreational drug use to a substance use disorder, very few studies focused on neurobiological markers for addiction. This study aimed to identify volumetric alterations in a sample of patients with mild alcohol use disorder with a short history of alcohol use, compared with a control group, and also focused on its association with impulsivity levels. Most magnetic resonance imaging studies have focused on severe alcohol use disorder, formerly called alcohol-dependent patients, showing alcohol-related structural alterations and their association with alcohol use history variables but not with personality parameters like impulsivity. Our hypothesis is that our group of alcohol users may already display structural alterations especially in brain regions related to inhibitory control like medial-prefrontal regions, and that those structural alterations could be more associated to personality traits like impulsivity than to drug use variables. Our results clearly demonstrate that our population showed lower regional grey and white matter volumes in the medial-prefrontal and orbitofrontal cortices, as well as higher regional white matter volume in the ventral striatum and the internal capsule. Volumetric alterations were associated to the Barratt's impulsivity score: the more impulsive the subjects, the lower the medial-prefrontal cortex grey matter volume.
Subject(s)
Alcoholism/pathology , Brain Mapping/methods , Brain/diagnostic imaging , Brain/pathology , Impulsive Behavior , Magnetic Resonance Imaging/methods , Adolescent , Adult , Humans , Image Processing, Computer-Assisted/methods , Male , Middle Aged , Neuropsychological Tests/statistics & numerical data , Organ Size , Young AdultABSTRACT
Se presenta una revisión retrospectiva de 100 casos clínicos con lesiones óseas primarias tumorales, diagnosticados, tratados y seguidos clínicamente por un lapso promedio de 24 meses, que se usaron para utilizar y evaluar el sistema de estadio clínico de neoplasias esqueléticas propuesto por Enneking. Toda la información clínica fué codificada en el lenguaje del sistema de Enneking, determinándose en cada uno de los casos el estado clínico correspondiente. Los elementos que se consideraron para su evaluación fueron la verificación de las correlaciones: clínico-radiológica-histopatológica del diagnóstico, y la del margen quirúrgico y tratamiento complementario con el estadio clínico, así como la concordancia de ambas correlaciones con su seguimiento. En nuestro estudio el sistema de Enneking demostró que es una metodología eficaz y confiable para el diagnóstico y tratamiento de los pacientes con neoplasias esqueléticas primarias.
