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1.
Echocardiography ; 41(6): e15859, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38853624

RESUMEN

Aortic stenosis (AS) stands as the most common valvular heart disease in developed countries and is characterized by progressive narrowing of the aortic valve orifice resulting in elevated transvalvular flow resistance, left ventricular hypertrophy, and progressive increased risk of heart failure and sudden death. This narrative review explores clinical challenges and evolving perspectives in moderate AS, where discrepancies between aortic valve area and pressure gradient measurements may pose diagnostic and therapeutic quandaries. Transthoracic echocardiography is the first-line imaging modality for AS evaluation, yet cases of discordance may require the application of ancillary noninvasive diagnostic modalities. This review underscores the importance of accurate grading of AS severity, especially in low-gradient phenotypes, emphasizing the need for vigilant follow-up. Current clinical guidelines primarily recommend aortic valve replacement for severe AS, potentially overlooking latent risks in moderate disease stages. The noninvasive multimodality imaging approach-including echocardiography, cardiac magnetic resonance, computed tomography, and nuclear techniques-provides unique insights into adaptive and maladaptive cardiac remodeling in AS and offers a promising avenue to deliver precise indications and exact timing for intervention in moderate AS phenotypes and asymptomatic patients, potentially improving long-term outcomes. Nevertheless, what we may have gleaned from a large amount of observational data is still insufficient to build a robust framework for clinical decision-making in moderate AS. Future research will prioritize randomized clinical trials designed to weigh the benefits and risks of preemptive aortic valve replacement in the management of moderate AS, as directed by specific imaging and nonimaging biomarkers.


Asunto(s)
Estenosis de la Válvula Aórtica , Válvula Aórtica , Ecocardiografía , Humanos , Estenosis de la Válvula Aórtica/fisiopatología , Estenosis de la Válvula Aórtica/cirugía , Ecocardiografía/métodos , Válvula Aórtica/diagnóstico por imagen , Válvula Aórtica/cirugía , Válvula Aórtica/fisiopatología , Índice de Severidad de la Enfermedad
2.
Environ Res ; 235: 116487, 2023 10 15.
Artículo en Inglés | MEDLINE | ID: mdl-37419196

RESUMEN

Bisphenols and Perfluoroalkyls are chemical compounds widely used in industry known to be endocrine disruptors (EDs). Once ingested through contaminated aliments, they mimic the activity of endogenous hormones leading to a broad spectrum of diseases. Due to the extensive use of plastic in human life, particular attention should be paid to antenatal exposure to Bisphenols and Perfluoroalkyls since they cross the placental barrier and accumulates in developing embryo. Here we investigated the effects of Bisphenol-A (BPA), Bisphenol-S (BPS), perfluorooctane-sulfonate (PFOS) and perfluorooctanoic-acid (PFOA), alone or combined, on human-induced pluripotent stem cells (hiPSCs) that share several biological features with the stem cells of blastocysts. Our data show that these EDs affect hiPSC inducing a great mitotoxicity and dramatic changes in genes involved in the maintenance of pluripotency, germline specification, and epigenetic regulation. We also evidenced that these chemicals, when combined, may have additive, synergistic but also negative effects. All these data suggest that antenatal exposure to these EDs may affect the integrity of stem cells in the developing embryos, interfering with critical stages of early human development that might be determinant for fertility. The observation that the effects of exposure to a combination of these chemicals are not easily foreseeable further highlights the need for wider awareness of the complexity of the EDs effects on human health and of the social and economic burden attributable to these compounds.


Asunto(s)
Disruptores Endocrinos , Fluorocarburos , Infertilidad , Humanos , Femenino , Embarazo , Epigénesis Genética , Placenta , Fertilidad , Compuestos de Bencidrilo/toxicidad , Compuestos de Bencidrilo/química , Fluorocarburos/toxicidad , Disruptores Endocrinos/toxicidad
3.
Sensors (Basel) ; 23(2)2023 Jan 11.
Artículo en Inglés | MEDLINE | ID: mdl-36679631

RESUMEN

Surface electromyography (sEMG) is the acquisition, from the skin, of the electrical signal produced by muscle activation. Usually, sEMG is measured through electrodes with electrolytic gel, which often causes skin irritation. Capacitive contactless electrodes have been developed to overcome this limitation. However, contactless EMG devices are still sensitive to motion artifacts and often not comfortable for long monitoring. In this study, a non-invasive contactless method to estimate parameters indicative of muscular activity and fatigue, as they are assessed by EMG, through infrared thermal imaging (IRI) and cross-validated machine learning (ML) approaches is described. Particularly, 10 healthy participants underwent five series of bodyweight squats until exhaustion interspersed by 1 min of rest. During exercising, the vastus medialis activity and its temperature were measured through sEMG and IRI, respectively. The EMG average rectified value (ARV) and the median frequency of the power spectral density (MDF) of each series were estimated through several ML approaches applied to IRI features, obtaining good estimation performances (r = 0.886, p < 0.001 for ARV, and r = 0.661, p < 0.001 for MDF). Although EMG and IRI measure physiological processes of a different nature and are not interchangeable, these results suggest a potential link between skin temperature and muscle activity and fatigue, fostering the employment of contactless methods to deliver metrics of muscular activity in a non-invasive and comfortable manner in sports and clinical applications.


Asunto(s)
Músculo Esquelético , Músculo Cuádriceps , Humanos , Músculo Esquelético/diagnóstico por imagen , Músculo Esquelético/fisiología , Electromiografía/métodos , Músculo Cuádriceps/fisiología , Fatiga , Aprendizaje Automático Supervisado , Fatiga Muscular/fisiología
4.
Int J Mol Sci ; 24(19)2023 Oct 09.
Artículo en Inglés | MEDLINE | ID: mdl-37834465

RESUMEN

The present study investigates the impact of two endocrine disruptors, namely Bisphenols (BPs) and Perfluoroalkyls (PFs), on human stem cells. These chemicals leach from plastic, and when ingested through contaminated food and water, they interfere with endogenous hormone signaling, causing various diseases. While the ability of BPs and PFs to cross the placental barrier and accumulate in fetal serum has been documented, the exact consequences for human development require further elucidation. The present research work explored the effects of combined exposure to BPs (BPA or BPS) and PFs (PFOS and PFOA) on human placenta (fetal membrane mesenchymal stromal cells, hFM-MSCs) and amniotic fluid (hAFSCs)-derived stem cells. The effects of the xenobiotics were assessed by analyzing cell proliferation, mitochondrial functionality, and the expression of genes involved in pluripotency and epigenetic regulation, which are crucial for early human development. Our findings demonstrate that antenatal exposure to BPs and/or PFs may alter the biological characteristics of perinatal stem cells and fetal epigenome, with potential implications for health outcomes at birth and in adulthood. Further research is necessary to comprehend the full extent of these effects and their long-term consequences.


Asunto(s)
Disruptores Endocrinos , Fluorocarburos , Células Madre Mesenquimatosas , Recién Nacido , Embarazo , Humanos , Femenino , Placenta/metabolismo , Epigénesis Genética , Líquido Amniótico/metabolismo , Células Madre Mesenquimatosas/metabolismo , Compuestos de Bencidrilo/toxicidad , Compuestos de Bencidrilo/metabolismo , Disruptores Endocrinos/farmacología , Evaluación de Resultado en la Atención de Salud , Fluorocarburos/toxicidad , Fluorocarburos/metabolismo
5.
BMC Oral Health ; 23(1): 425, 2023 06 27.
Artículo en Inglés | MEDLINE | ID: mdl-37370064

RESUMEN

BACKGROUND: Dental implant is the principal treatment for edentulism and the healthiness of the peri-implant tissue has a pivotal role for its longterm success. In addition, it has been shown that also the topography of the healing abutment can influence the outcome of the restoration. The objective of this human clinical trial was to assess the impact of a novel laser-treated healing abutment on peri-implant connective tissue and extracellular matrix proteins compared to the conventional machined surface, which served as the control group. METHODS: During second surgical stage a customized healing abutment were inserted on 30 single dental implants. Healing abutments were realized with two alternated different surface (two side laser-treated surfaces and two side machined surfaces) in order to be considered both as test and control on the same implant and reduce positioning bias. Following the soft tissue healing period (30 ± 7 days) a 5 mm circular biopsy was retrieved. Immuno-histochemical and quantitative real-time PCR (qPCR) analyses were performed on Collagen, Tenascin C, Fibrillin I, Metalloproteinases (MMPs) and their inhibitor (TIMPs). 15 were processed for qPCR, while the other 15 were processed for immunohistochemical analysis. Paired t-test between the two groups were performed. A value of p < 0.05 was considered statistically significant. RESULTS: Results revealed that the connective tissue facing the laser-treated surface expressed statistically significant lower amount of MMPs (p < 0.05) and higher level of TIMPs 3 (p < 0.05), compared to the tissue surrounding the machined implant, which, in turn expressed also altered level of extracellular matrix protein (Tenascin C, Fibrillin I (p < 0.05)) and Collagen V, that are known to be altered also in peri-implantitis. CONCLUSIONS: In conclusion, the laser-treated surface holds promise in positively influencing wound healing of peri-implant connective tissue. Results demonstrated that topographic nature of the healing abutments can positively influence mucosal wound healing and molecular expression. Previous studies have been demonstrated how laser treatment can rightly influence integrity and functionality of the gingiva epithelium and cell adhesion. Regarding connective tissue different molecular expression demonstrated a different inflammatory pattern between laser treated or machined surfaces where laser treated showed better response. Targeted interventions and preventive measures on peri- implant topography could effectively minimize the risk of peri-implant diseases contributing to the long-term success and durability of restoration. However, new studies are mandatory to better understand this phenomenon and the role of this surface in the peri-implantitis process.  TRIAL REGISTRATION: This trial is registered with ClinicalTrials.gov Identifier: (Registration Number: NCT05754970 ). Registered 06/03/2023, retrospectively registered.


Asunto(s)
Implantes Dentales , Periimplantitis , Humanos , Implantes Dentales/efectos adversos , Tenascina , Colágeno , Tejido Conectivo , Rayos Láser , Fibrilinas , Metaloproteinasas de la Matriz , Titanio
6.
Int J Mol Sci ; 22(2)2021 Jan 09.
Artículo en Inglés | MEDLINE | ID: mdl-33435429

RESUMEN

The myocardium is among the most energy-consuming tissues in the body, burning from 6 to 30 kg of ATP per day within the mitochondria, the so-called powerhouse of the cardiomyocyte. Although mitochondrial genetic disorders account for a small portion of cardiomyopathies, mitochondrial dysfunction is commonly involved in a broad spectrum of heart diseases, and it has been implicated in the development of heart failure via maladaptive circuits producing and perpetuating mitochondrial stress and energy starvation. In this bench-to-bedside review, we aimed to (i) describe the key functions of the mitochondria within the myocardium, including their role in ischemia/reperfusion injury and intracellular calcium homeostasis; (ii) examine the contribution of mitochondrial dysfunction to multiple cardiac disease phenotypes and their transition to heart failure; and (iii) discuss the rationale and current evidence for targeting mitochondrial function for the treatment of heart failure, including via sodium-glucose cotransporter 2 inhibitors.


Asunto(s)
Cardiopatías/patología , Mitocondrias Cardíacas/patología , Animales , Calcio/metabolismo , Cardiomiopatías/metabolismo , Cardiomiopatías/patología , Metabolismo Energético , Cardiopatías/metabolismo , Insuficiencia Cardíaca/metabolismo , Insuficiencia Cardíaca/patología , Humanos , Mitocondrias Cardíacas/metabolismo , Dinámicas Mitocondriales , Daño por Reperfusión Miocárdica/metabolismo , Daño por Reperfusión Miocárdica/patología
7.
Eur J Appl Physiol ; 120(10): 2233-2245, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32728820

RESUMEN

PURPOSE: Vascular dysfunction has been demonstrated in patients with Alzheimer's disease (AD). Exercise is known to positively affect vascular function. Thus, the aim of our study was to investigate exercise-induced effects on vascular function in AD. METHODS: Thirty-nine patients with AD (79 ± 8 years) were recruited and randomly assigned to exercise training (EX, n = 20) or control group (CTRL, n = 19). All subjects performed 72 treatment sessions (90 min, 3 t/w). EX included moderate-high-intensity aerobic and strength training. CTRL included cognitive stimuli (visual, verbal, auditive). Before and after the 6-month treatment, the vascular function was measured by passive-leg movement test (PLM, calculating the variation in blood flow: ∆peak; and area under the curve: AUC) tests, and flow-mediated dilation (FMD, %). A blood sample was analyzed for vascular endothelial growth factor (VEGF). Arterial blood flow (BF) and shear rate (SR) were measured during EX and CTRL during a typical treatment session. RESULTS: EX group has increased FMD% (+ 3.725%, p < 0.001), PLM ∆peak (+ 99.056 ml/min, p = 0.004), AUC (+ 37.359AU, p = 0.037) and VEGF (+ 8.825 pg/ml, p = 0.004). In the CTRL group, no difference between pre- and post-treatment was found for any variable. Increase in BF and SR was demonstrated during EX (BF + 123%, p < 0.05; SR + 134%, p < 0.05), but not during CTRL treatment. CONCLUSION: Exercise training improves peripheral vascular function in AD. These ameliorations may be due to the repetitive increase in SR during exercise which triggers NO and VEGF upregulation. This approach might be included in standard AD clinical practice as an effective strategy to treat vascular dysfunction in this population.


Asunto(s)
Enfermedad de Alzheimer/terapia , Terapia por Ejercicio/métodos , Hemodinámica , Factor A de Crecimiento Endotelial Vascular/sangre , Estimulación Acústica/métodos , Anciano , Anciano de 80 o más Años , Cognición , Femenino , Humanos , Masculino , Movimiento , Estimulación Luminosa/métodos
8.
Int J Mol Sci ; 21(18)2020 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-32916865

RESUMEN

Degeneration of dopaminergic neurons represents the cause of many neurodegenerative diseases, with increasing incidence worldwide. The replacement of dead cells with new healthy ones may represent an appealing therapeutic approach to these pathologies, but currently, only pluripotent stem cells can generate dopaminergic neurons with high efficiency. However, with the use of these cells arises safety and/or ethical issues. Human mesenchymal stromal cells (hFM-MSCs) are perinatal stem cells that can be easily isolated from the amniochorionic membrane after delivery. Generally considered multipotent, their real differentiative potential is not completely elucidated. The aim of this study was to analyze their stemness characteristics and to evaluate whether they may overcome their mesenchymal fate, generating dopaminergic neurons. We demonstrated that hFM-MSCs expressed embryonal genes OCT4, NANOG, SOX2, KLF4, OVOL1, and ESG1, suggesting they have some features of pluripotency. Moreover, hFM-MSCs that underwent a dopaminergic differentiation protocol gradually increased the transcription of dopaminergic markers LMX1b, NURR1, PITX3, and DAT. We finally obtained a homogeneous population of cells resembling the morphology of primary midbrain dopaminergic neurons that expressed the functional dopaminergic markers TH, DAT, and Nurr1. In conclusion, our results suggested that hFM-MSCs retain the expression of pluripotency genes and are able to differentiate not only into mesodermal cells, but also into neuroectodermal dopaminergic neuron-like cells.


Asunto(s)
Diferenciación Celular , Neuronas Dopaminérgicas , Células Madre Mesenquimatosas/fisiología , Linaje de la Célula , Humanos , Células Madre Pluripotentes Inducidas , Factor 4 Similar a Kruppel
9.
Int J Mol Sci ; 21(17)2020 Aug 31.
Artículo en Inglés | MEDLINE | ID: mdl-32878275

RESUMEN

Cell therapy with a variety of stem populations is increasingly being investigated as a promising regenerative strategy for cardiovascular (CV) diseases. Their combination with adequate scaffolds represents an improved therapeutic approach. Recently, several biomaterials were investigated as scaffolds for CV tissue repair, with decellularized extracellular matrices (dECMs) arousing increasing interest for cardiac tissue engineering applications. The aim of this study was to analyze whether dECMs support the cardiac differentiation of CardiopoieticAF stem cells. These perinatal stem cells, which can be easily isolated without ethical or safety limitations, display a high cardiac differentiative potential. Differentiation was previously achieved by culturing them on Matrigel, but this 3D scaffold is not transplantable. The identification of a new transplantable scaffold able to support CardiopoieticAF stem cell cardiac differentiation is pivotal prior to encouraging translation of in vitro studies in animal model preclinical investigations. Our data demonstrated that decellularized extracellular matrices already used in cardiac surgery (the porcine CorTMPATCH and the equine MatrixPatchTM) can efficiently support the proliferation and cardiac differentiation of CardiopoieticAF stem cells and represent a useful cellular scaffold to be transplanted with stem cells in animal hosts.


Asunto(s)
Líquido Amniótico/citología , Diferenciación Celular , Matriz Extracelular/química , Miocitos Cardíacos/citología , Células Madre/citología , Ingeniería de Tejidos , Andamios del Tejido/química , Líquido Amniótico/metabolismo , Animales , Adhesión Celular , Proliferación Celular , Colágeno , Combinación de Medicamentos , Matriz Extracelular/metabolismo , Femenino , Caballos , Humanos , Laminina , Masculino , Miocitos Cardíacos/metabolismo , Proteoglicanos , Células Madre/metabolismo , Porcinos
10.
Int J Mol Sci ; 21(17)2020 Aug 22.
Artículo en Inglés | MEDLINE | ID: mdl-32842709

RESUMEN

The health of peri-implant soft tissues is important for the long-term success rate of dental implants and the surface topography is pivotal in influencing it. Thus, the aim of this study was to evaluate, in human patients, the inflammatory mucosal microenvironment in the tissue surrounding a new, nanoscale, laser-treated healing abutment characterized by engineered nanopores versus a standard machined-surface. Analyses of anti- and pro-inflammatory markers, cytokeratins, desmosomal proteins and scanning electron microscopy were performed in 30 soft-tissue biopsies retrieved during second-stage surgery. The results demonstrate that the soft tissue surrounding the laser-treated surface was characterized by a lower grade of inflammation than the one facing the machined-surface, which, in turn, showed a disrupted epithelium and altered desmosomes. Moreover, higher adhesion of the epithelial cells on the laser-treated surface was detected compared to the machined one. In conclusion, the laser-treated surface topography seems to play an important role not only in cell adhesion, but also on the inflammatory makers' expression of the soft tissue microenvironment. Thus, from a clinical point of view, the use of this kind of topography may be of crucial importance not only on healing abutments but also on prosthetic ones.


Asunto(s)
Pilares Dentales , Implantes Dentales , Encía/fisiología , Anciano , Adhesión Celular , Femenino , Encía/citología , Gingivitis/etiología , Gingivitis/metabolismo , Humanos , Molécula 1 de Adhesión Intercelular/metabolismo , Queratinas , Terapia por Láser/métodos , Masculino , Metaloproteinasa 9 de la Matriz/genética , Microscopía Electrónica de Rastreo , Persona de Mediana Edad , Nanoporos , Inhibidor Tisular de Metaloproteinasa-1/genética , Factor de Necrosis Tumoral alfa/genética
11.
Int J Mol Sci ; 20(7)2019 Mar 29.
Artículo en Inglés | MEDLINE | ID: mdl-30934825

RESUMEN

One of the main aims in regenerative medicine is to find stem cells that are easy to obtain and are safe and efficient in either an autologous or allogenic host when transplanted. This review provides an overview of the potential use of the fetal annexes in regenerative medicine: we described the formation of the annexes, their immunological features, the new advances in the phenotypical characterization of fetal annexes-derived stem cells, the progressions obtained in the analysis of both their differentiative potential and their secretoma, and finally, the potential use of decellularized fetal membranes. Normally discarded as medical waste, the umbilical cord and perinatal tissue not only represent a rich source of stem cells but can also be used as a scaffold for regenerative medicine, providing a suitable environment for the growth and differentiation of stem cells.


Asunto(s)
Feto/citología , Medicina Regenerativa , Diferenciación Celular , Humanos , Comunicación Paracrina , Células Madre/citología , Gelatina de Wharton/citología
12.
Int J Mol Sci ; 20(13)2019 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-31284374

RESUMEN

The term diabetic cardiomyopathy (DCM) labels an abnormal cardiac structure and performance due to intrinsic heart muscle malfunction, independently of other vascular co-morbidity. DCM, accounting for 50%-80% of deaths in diabetic patients, represents a worldwide problem for human health and related economics. Optimal glycemic control is not sufficient to prevent DCM, which derives from heart remodeling and geometrical changes, with both consequences of critical events initially occurring at the cardiomyocyte level. Cardiac cells, under hyperglycemia, very early undergo metabolic abnormalities and contribute to T helper (Th)-driven inflammatory perturbation, behaving as immunoactive units capable of releasing critical biomediators, such as cytokines and chemokines. This paper aims to focus onto the role of cardiomyocytes, no longer considered as "passive" targets but as "active" units participating in the inflammatory dialogue between local and systemic counterparts underlying DCM development and maintenance. Some of the main biomolecular/metabolic/inflammatory processes triggered within cardiac cells by high glucose are overviewed; particular attention is addressed to early inflammatory cytokines and chemokines, representing potential therapeutic targets for a prompt early intervention when no signs or symptoms of DCM are manifesting yet. DCM clinical management still represents a challenge and further translational investigations, including studies at female/male cell level, are warranted.


Asunto(s)
Cardiomiopatías Diabéticas/patología , Miocitos Cardíacos/patología , Animales , Antiinflamatorios/uso terapéutico , Citocinas/metabolismo , Cardiomiopatías Diabéticas/tratamiento farmacológico , Humanos , Inflamasomas/metabolismo , Inflamación/patología , Miocitos Cardíacos/metabolismo
13.
Women Health ; 58(4): 387-402, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-28328386

RESUMEN

The literature indicates that the plasma cortisol-to-dehydroepiandrosterone-sulfate (DHEA-S) ratio is a marker of health status after menopause, when a decline in both estrogen and DHEA-S and an increase in cortisol occur. An increase in the cortisol-to-DHEA-S ratio has been positively correlated with metabolic syndrome, all-cause mortality, cancer, and other diseases. The aim of this study was to investigate the effects of a walking program on the plasma cortisol-to-DHEA-S ratio in postmenopausal women. Fifty-one postmenopausal women participated in a 13-week supervised walking program, in the metropolitan area of Pescara (Italy), from June to September 2013. Participants were evaluated in April-May and September-October of the same year. The linear mixed model showed that the variation of the log10Cortisol-to-log10DHEA-S ratio was associated with the volume of exercise (p = .03). Participants having lower adherence to the walking program did not have a significantly modified log10Cortisol or log10DHEA-S, while those having the highest adherence had a significant reduction in log10Cortisol (p = .016) and a nearly significant increase in log10DHEA-S (p = .084). Walking training appeared to reduce the plasma log10Cortisol-to-log10DHEA-S ratio, although a minimum level of training was necessary to achieve this significant reduction.


Asunto(s)
Sulfato de Deshidroepiandrosterona/sangre , Ejercicio Físico/psicología , Hidrocortisona/sangre , Posmenopausia/sangre , Caminata/fisiología , Femenino , Estado de Salud , Humanos , Italia , Menopausia , Persona de Mediana Edad
14.
Int J Mol Sci ; 18(8)2017 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-28825628

RESUMEN

The association of lysosomal dysfunction and neurodegeneration has been documented in several neurodegenerative diseases, including Alzheimer's Disease (AD). Herein, we investigate the association of lysosomal enzymes with AD at different stages of progression of the disease (mild and severe) or with mild cognitive impairment (MCI). We conducted a screening of two classes of lysosomal enzymes: glycohydrolases (ß-Hexosaminidase, ß-Galctosidase, ß-Galactosylcerebrosidase, ß-Glucuronidase) and proteases (Cathepsins S, D, B, L) in peripheral blood samples (blood plasma and PBMCs) from mild AD, severe AD, MCI and healthy control subjects. We confirmed the lysosomal dysfunction in severe AD patients and added new findings enhancing the association of abnormal levels of specific lysosomal enzymes with the mild AD or severe AD, and highlighting the difference of AD from MCI. Herein, we showed for the first time the specific alteration of ß-Galctosidase (Gal), ß-Galactosylcerebrosidase (GALC) in MCI patients. It is notable that in above peripheral biological samples the lysosomes are more sensitive to AD cellular metabolic alteration when compared to levels of Aß-peptide or Tau proteins, similar in both AD groups analyzed. Collectively, our findings support the role of lysosomal enzymes as potential peripheral molecules that vary with the progression of AD, and make them useful for monitoring regenerative medicine approaches for AD.


Asunto(s)
Enfermedad de Alzheimer/sangre , Disfunción Cognitiva/sangre , Galactosilceramidasa/sangre , beta-Galactosidasa/sangre , Anciano , Anciano de 80 o más Años , Enfermedad de Alzheimer/enzimología , Enfermedad de Alzheimer/patología , Péptidos beta-Amiloides/sangre , Disfunción Cognitiva/enzimología , Disfunción Cognitiva/patología , Progresión de la Enfermedad , Femenino , Regulación de la Expresión Génica , Humanos , Lisosomas/enzimología , Masculino , Medicina Regenerativa , Índice de Severidad de la Enfermedad , Proteínas tau/sangre
15.
J Cell Physiol ; 231(3): 576-86, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26205888

RESUMEN

INTRODUCTION: IL-6 influences several biological processes, including cardiac stem cell and cardiomyocyte physiology. Although JAK-STAT3 activation is the defining feature of IL-6 signaling, signaling molecules such as PI3K, PKCs, and ERK1/2 are also activated and elicit different responses. Moreover, most studies on the specific role of these signaling molecules focus on the adult heart, and few studies are available on the biological effects evoked by IL-6 in embryonic cardiomyocytes. AIM: The aim of this study was to clarify the biological response of embryonic heart derived cells to IL-6 by analyzing the morphological modifications and the signaling cascades evoked by the cytokine in H9c2 cells. RESULTS: IL-6 stimulation determined the terminal differentiation of H9c2 cells, as evidenced by the increased expression of cardiac transcription factors (NKX2.5 and GATA4), structural proteins (α-myosin heavy chain and cardiac Troponin T) and the gap junction protein Connexin 43. This process was mediated by the rapid modulation of PI3K, Akt, PTEN, and PKCζ phosphorylation levels. PI3K recruitment was an upstream event in the signaling cascade and when PI3K was inhibited, IL-6 failed to modify PKCζ, PTEN, and Akt phosphorylation. Blocking PKCζ activity affected only PTEN and Akt. Finally, the overexpression of a constitutively active form of PKCζ in H9c2 cells largely mimicked the morphological and molecular effects evoked by IL-6. CONCLUSIONS: This study demonstrated that IL-6 induces the cardiac differentiation of H9c2 embryonic cells though a signaling cascade that involves PI3K, PTEN, and PKCζ activities.


Asunto(s)
Diferenciación Celular/fisiología , Interleucina-6/metabolismo , Miocitos Cardíacos/citología , Fosfatidilinositol 3-Quinasas/metabolismo , Proteína Quinasa C/metabolismo , Transducción de Señal/fisiología , Animales , Línea Celular , Activación Enzimática , Miocitos Cardíacos/metabolismo , Ratas , Miosinas Ventriculares/metabolismo
16.
J Adv Nurs ; 70(11): 2539-49, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24684163

RESUMEN

AIMS: This multi-centre prospective field study evaluated whether peripheral venous catheter site of insertion influences the risk of catheter-related phlebitis. Potential predictors of phlebitis were also investigated. BACKGROUND: Millions of patients worldwide use peripheral venous catheters, which frequently cause local complications including phlebitis, infection and obstruction. Although phlebitis predictors have been broadly investigated, uncertainties remain on the potential effect of cannulation anatomical site, duration and the appropriate time for catheter removal. DESIGN: A prospective cohort design was carried out from January-June 2012. METHODS: The clinical course of each patient who received a new peripheral venous catheter for any cause in five Italian hospitals was followed by trained nurses until catheter removal. The presence of phlebitis was assessed every 24 hours using the Visual Infusion Phlebitis score. Analyses were based upon multilevel mixed-effects regression. RESULTS: The final sample consisted of 1498 patients. The average time for catheters in situ was 65·6 hours and 23·6% of the catheters were in place beyond 96 hours. Overall phlebitis incidence was 15·4%, 94·4% of which were grade 1. The likelihood of phlebitis independently increased with increasing catheter duration, being highest after 96 hours. Compared with patients with catheter placed in the dorsum of the hand (22·8% of the sample), those with the catheter located in the antecubital fossa (34·1%) or forearm were less likely to have a phlebitis of any grade. CONCLUSIONS: Antecubital fossa and forearm veins may be preferential sites for peripheral venous cannulation. Our results support Centers for Disease Control and Prevention recommendations to replace catheters in adults no later than 96 hours. A relevant proportion of healthcare personnel did not adhere to such guidelines - more attention to this issue is required.


Asunto(s)
Flebitis/epidemiología , Dispositivos de Acceso Vascular/efectos adversos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Infusiones Intravenosas , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Adulto Joven
17.
J Aging Phys Act ; 22(4): 482-9, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24084003

RESUMEN

PURPOSE: High-intensity aerobic interval training (AIT) has been reported to be more effective than continuous aerobic training (CoAT) to improve metabolic health. The aim of our study was to investigate whether moderate-intensity AIT is more effective than CoAT on metabolic health when applied to a walking training program. DESIGN/METHODS: Thirty-two postmenopausal women (55.37 ± 3.46 years) were investigated for body composition, plasma glucose, insulin, lipids, adiponectin, HOMA-IR, HOMA-AD, aerobic fitness, dietary habits, and spontaneous physical activity, and randomly assigned to one of two different walking training programs: CoAT or AIT. RESULTS: CoAT and AIT elicited the same physiological benefits, including: reduction of plasma glucose, insulin, HOMA-IR and HOMA-AD, and increase of plasma HDL-C, adiponectin, and aerobic fitness. CONCLUSIONS: An AIT scheme as part of an outdoor walking training program elicits the same physiological adaptations as a CoAT scheme, probably because walking does not promote exercise intensities that elicit greater effects.


Asunto(s)
Educación/métodos , Aptitud Física/fisiología , Posmenopausia/metabolismo , Caminata/fisiología , Adaptación Fisiológica , Composición Corporal , Índice de Masa Corporal , HDL-Colesterol/sangre , Femenino , Humanos , Insulina/sangre , Persona de Mediana Edad , Resultado del Tratamiento
18.
Brain Sci ; 14(6)2024 May 29.
Artículo en Inglés | MEDLINE | ID: mdl-38928553

RESUMEN

Parkinson's disease (PD), multiple sclerosis (MS), and amyotrophic lateral sclerosis (ALS) are examples of neurodegenerative movement disorders (NMDs), which are defined by a gradual loss of motor function that is frequently accompanied by cognitive decline. Although genetic abnormalities have long been acknowledged as significant factors, new research indicates that epigenetic alterations are crucial for the initiation and development of disease. This review delves into the complex interactions that exist between the pathophysiology of NMDs and epigenetic mechanisms such DNA methylation, histone modifications, and non-coding RNAs. Here, we examine how these epigenetic changes could affect protein aggregation, neuroinflammation, and gene expression patterns, thereby influencing the viability and functionality of neurons. Through the clarification of the epigenetic terrain underpinning neurodegenerative movement disorders, this review seeks to enhance comprehension of the underlying mechanisms of the illness and augment the creation of innovative therapeutic strategies.

19.
Healthcare (Basel) ; 12(2)2024 Jan 16.
Artículo en Inglés | MEDLINE | ID: mdl-38255109

RESUMEN

Breast cancer treatments can elicit negative kinesiological side effects concerning both the posture and functional status of breast cancer survivors. As our body is functionally organized in myofascial meridians, physical exercise practice should favor a whole-body approach rather than a local one. The aim of the study was to investigate and compare the effects of two whole-body disciplines, i.e., adapted Nordic Walking and myofascial exercise, on the flexibility and strength performances in BCS. One hundred and sixty breast cancer survivors were trained three times per week for 12 weeks through adapted Nordic Walking or myofascial exercise. Handgrip, sit and reach, back scratch, and single leg back bridge tests and body composition were assessed at the beginning and completion of the training period. Linear mixed models showed no significant changes in body composition, whereas flexibility (p < 0.001), strength (p < 0.001), and muscle quality index (p = 0.003) changed independently from the treatment. When data modification has been analyzed according to sub-sample membership, no significant differences have been observed. Age, radiation therapy, and chemotherapy seem to have independent effects on several investigated variables. Twelve weeks of adapted myofascial exercise and Nordic Walking led to significant changes in flexibility, strength, and muscle quality in breast cancer survivors, with no apparent superiority of one approach over the other.

20.
Curr Obes Rep ; 2024 Jul 03.
Artículo en Inglés | MEDLINE | ID: mdl-38958868

RESUMEN

PURPOSE OF REVIEW: This consensus statement from the Italian Society of Motor and Sports Sciences (Società Italiana di Scienze Motorie e Sportive, SISMeS) and the Italian Society of Phlebology (Società Italiana di Flebologia, SIF) provides the official view on the role of exercise as a non-pharmacological approach in lipedema. In detail, this consensus statement SISMeS - SIF aims to provide a comprehensive overview of lipedema, focusing, in particular, on the role played by physical exercise (PE) in the management of its clinical features. RECENT FINDINGS: Lipedema is a chronic disease characterized by abnormal fat accumulation. It is often misdiagnosed as obesity, despite presenting distinct pathological mechanisms. Indeed, recent evidence has reported differences in adipose tissue histology, metabolomic profiles, and gene polymorphisms associated with this condition, adding new pieces to the complex puzzle of lipedema pathophysiology. Although by definition lipedema is a condition resistant to diet and PE, the latter emerges for its key role in the management of lipedema, contributing to multiple benefits, including improvements in mitochondrial function, lymphatic drainage, and reduction of inflammation. Various types of exercise, such as aquatic exercises and strength training, have been shown to alleviate symptoms and improve the quality of life of patients with lipedema. However, standardized guidelines for PE prescription and long-term management of patients with lipedema are lacking, highlighting the need for recommendations and further research in this area in order to optimise therapeutic strategies.

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