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OBJECTIVE: This study aimed to evaluate epilepsy outcome and antiseizure medication (ASM) discontinuation after lesionectomies as first surgical approach in pediatric population diagnosed with low-grade epilepsy-associated neuroepithelial tumors (LEATs). METHODS: We conducted a retrospective study. Thirty-six consecutive patients with histological diagnoses of LEATs who underwent surgery between 2018 and 2021 at our institution were included. The clinical and surgical data were retrospectively analyzed. RESULTS: Thirty (83.3%) of 36 patients are free of disabling seizures (Engel class I) and 19 (63,4%) of them are classified as Engel Ia. In 17 (47.2%) patients, ASM could be discontinued. The mean age at surgery was 8.6 years (±4.04) and the mean age at onset of epilepsy was 7.2 years (±3.8), whereas the mean duration of epilepsy in months at the time of surgery was 21.3 months (±23.7). The epileptogenic tumor was in the temporal lobe in 20 (55.5%) patients. Because of seizure persistence, a second or a third surgery was necessary for six patients (16.7%) and four of them had residual lesions (three in temporal and one in extratemporal site). No perioperative complications were recorded, including acute seizures, with a median hospitalization time of 7 days. Shorter epilepsy duration at time of surgery as long as a single ASM was significantly correlated with an Engel class I outcome (p-value = .01 and p-value = .016, respectively). Focal seizure semeiology was associated with an increased probability of antiseizure medication discontinuation (p-value = .042). SIGNIFICANCE: Our findings confirm that shorter epilepsy disease duration, monotherapy before surgery, and seizure semeiology are determinant factors for a positive seizure outcome and medication discontinuation, also with less invasive surgical approaches such as lesionectomies. However, considering the intrinsic multifactorial epileptogenic nature of LEATs, a tailored surgical approach should be considered to optimize clinical and seizure outcome, especially for lesions located in the temporal lobe.
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Anticonvulsivantes , Neoplasias Encefálicas , Neoplasias Neuroepiteliomatosas , Humanos , Criança , Feminino , Masculino , Estudos Retrospectivos , Anticonvulsivantes/administração & dosagem , Pré-Escolar , Neoplasias Encefálicas/cirurgia , Neoplasias Encefálicas/complicações , Adolescente , Neoplasias Neuroepiteliomatosas/cirurgia , Neoplasias Neuroepiteliomatosas/complicações , Epilepsia/etiologia , Epilepsia/tratamento farmacológico , Epilepsia/cirurgia , Procedimentos NeurocirúrgicosRESUMO
OBJECTIVE: To measure the size of jugular foramina in infants affected by external hydrocephalus (EH) and in a control group, to support the hypothesis that a jugular foramen (JF) stenosis may determine dural venous sinus alterations and increased venous outflow resistance as main pathophysiological factor. METHODS: Minimum, maximum, and mean values of JF areas were measured in a series of phase-contrast magnetic resonance venous angiography (angio MRV PCA3D) performed on 81 infants affected by EH. Results were compared with a group of 54 controls. RESULTS: Smaller JF area was significantly smaller in patients versus controls (43.1 ± 14.6 vs. 52.7 ± 17.8; p < 0.001) resulting in a significantly smaller mean JF areas in patients vs. controls (51.6 ± 15.8 vs. 57.0 ± 18.3; p = 0.043). In patients, smaller JF areas were significantly associated with higher venous obstruction grading score (VOGS) both on the right (p = 0.018) and on the left side (p = 0.005). Positional plagiocephaly (cranial vault asymmetry index > 3.5%) was more frequent among EH patients than controls (38/17) but the difference was not significant (p = 0.07). In the 38 plagiocephalic patients, JF area was smaller on the flattened side than the contralateral in a significant number of cases both in right (21/7) and left (9/1) plagiocephaly (p < 0.0005) as well as the mean area (48.2 + 16.4 mm2 vs. 57.5 + 20.7 mm2, p = 0.002) and VOGS was significantly higher on the plagiocephalic side than on the contralateral side (1.6 ± 1.1 vs. 1.1 ± 0.9, p = 0.019). CONCLUSION: In this series of infants affected by EH, the mean size of the ostium of both JF resulted significantly smaller than controls. JF stenosis was significantly associated with higher degrees of venous obstruction on both sides, suggesting a direct extrinsic effect of JF size on dural sinus lumen and possible consequent effect on venous outflow resistance. Positional plagiocephaly, when present, was associated with a decreased JF area and increased VOGS on the flattened side.
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Hidrocefalia , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Constrição Patológica/diagnóstico por imagem , Hidrocefalia/diagnóstico por imagem , Hidrocefalia/etiologia , Forâmen Jugular/diagnóstico por imagem , Angiografia por Ressonância Magnética , Estudos de Casos e ControlesRESUMO
Pallister-Killian syndrome (PKS; OMIM #601803) is a rare genetic disorder typically characterized by developmental delay, seizures, sparse temporal hair, and facial dysmorphisms. PKS is most frequently caused by mosaic supernumerary isochromosome 12p. Here, we report a 27-month-old girl with a prenatal diagnosis of PKS and a histopathological diagnosis of pineocytoma.
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Transtornos Cromossômicos , Pinealoma , Humanos , Feminino , Transtornos Cromossômicos/genética , Pinealoma/diagnóstico por imagem , Pinealoma/genética , Pré-Escolar , Cromossomos Humanos Par 12/genética , Glândula Pineal/patologia , Glândula Pineal/diagnóstico por imagemRESUMO
PURPOSE: To evaluate the ability of an artificial intelligence (AI) tool in magnetic resonance imaging (MRI) assessment of degenerative pathologies of lumbar spine using radiologist evaluation as a gold standard. METHODS: Patients with degenerative pathologies of lumbar spine, evaluated with MRI study, were enrolled in a retrospective study approved by local ethical committee. A comprehensive software solution (CoLumbo; SmartSoft Ltd., Varna, Bulgaria) designed to label the segments of the lumbar spine and to detect a broad spectrum of degenerative pathologies based on a convolutional neural network (CNN) was employed, utilizing an automatic segmentation. The AI tool efficacy was compared to data obtained by a senior neuroradiologist that employed a semiquantitative score. Chi-square test was used to assess the differences among groups, and Spearman's rank correlation coefficient was calculated between the grading assigned by radiologist and the grading obtained by software. Moreover, agreement was assessed between the value assigned by radiologist and software. RESULTS: Ninety patients (58 men; 32 women) affected with degenerative pathologies of lumbar spine and aged from 60 to 81 years (mean 66 years) were analyzed. Significant correlations were observed between grading assigned by radiologist and the grading obtained by software for each localization. However, only when the localization was L2-L3, there was a good correlation with a coefficient value of 0.72. The best agreements were obtained in case of L1-L2 and L2-L3 localizations and were, respectively, of 81.1% and 72.2%. The lowest agreement of 51.1% was detected in case of L4-L5 locations. With regard canal stenosis and compression, the highest agreement was obtained for identification of in L5-S1 localization. CONCLUSIONS: AI solution represents an efficacy and useful toll degenerative pathologies of lumbar spine to improve radiologist workflow.
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Inteligência Artificial , Vértebras Lombares , Masculino , Humanos , Feminino , Vértebras Lombares/diagnóstico por imagem , Estudos Retrospectivos , Dados Preliminares , Imageamento por Ressonância Magnética/métodosRESUMO
Increased risk of neurodegenerative diseases has been envisaged for air pollution exposure. On the other hand, environmental risk factors, including air pollution, have been suggested for Amyotrophic Lateral Sclerosis (ALS) pathomechanism. Therefore, the neurotoxicity of ultrafine particulate matter (PM0.1) (PM < 0.1 µm size) and its sub-20â¯nm nanoparticle fraction (NP20) has been investigated in motor neuronal-like cells and primary cortical neurons, mainly affected in ALS. The present data showed that PM0.1 and NP20 exposure induced endoplasmic reticulum (ER) stress, as occurred in cortex and spinal cord of ALS mice carrying G93A mutation in SOD1 gene. Furthermore, NSC-34 motor neuronal-like cells exposed to PM0.1 and NP20 shared the same proteomic profile on some apoptotic factors with motor neurons treated with the L-BMAA, a neurotoxin inducing Amyotrophic Lateral Sclerosis/Parkinson-Dementia Complex (ALS/PDC). Of note ER stress induced by PM0.1 and NP20 in motor neurons was associated to pathological changes in ER morphology and dramatic reduction of organellar Ca2+ level through the dysregulation of the Ca2+-pumps SERCA2 and SERCA3, the Ca2+-sensor STIM1, and the Ca2+-release channels RyR3 and IP3R3. Furthermore, the mechanism deputed to ER Ca2+ refilling (e.g. the so called store operated calcium entry-SOCE) and the relative currents ICRAC were also altered by PM0.1 and NP20 exposure. Additionally, these carbonaceous particles caused the exacerbation of L-BMAA-induced ER stress and Caspase-9 activation. In conclusion, this study shows that PM0.1 and NP20 induced the aberrant expression of ER proteins leading to dysmorphic ER, organellar Ca2+ dysfunction, ER stress and neurotoxicity, providing putative correlations with the neurodegenerative process occurring in ALS.
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Esclerose Lateral Amiotrófica , Material Particulado , Animais , Camundongos , Esclerose Lateral Amiotrófica/induzido quimicamente , Esclerose Lateral Amiotrófica/genética , Esclerose Lateral Amiotrófica/metabolismo , Retículo Endoplasmático/metabolismo , Neurônios Motores/metabolismo , Proteômica , Cultura Primária de Células , Material Particulado/efeitos adversos , Estresse do Retículo Endoplasmático , Cálcio/metabolismo , Modelos Animais de DoençasRESUMO
Introduction: The COVID-19 pandemic has posed significant challenges for healthcare workers worldwide, potentially affecting their sense of coherence (SOC) and overall well-being. This study aimed to identify factors associated with different levels of SOC among healthcare workers, exploring demographic characteristics, work-related factors, changes in relationships and social habits, and the overall well-being. Methods: A cross-sectional study was conducted among 628 healthcare workers. SOC scores were assessed using a standardized questionnaire. Statistical analyses were performed to identify associations between these factors and SOC. Results: Healthcare workers had a lower average SOC score (mean: 57.1) compared to the national average in Italy (mean: 60.3). Younger age and shorter length of service were associated with a higher risk of low SOC (p < 0.0001). Healthcare workers in the northwestern regions of Italy had an increased risk of low SOC compared to their counterparts in the northeastern regions (p = 0.0336). Adverse pandemic-related experiences and worsening social relationships were also associated with a higher risk of low SOC (p < 0.0001). Conclusions: This study highlights the unique challenges and stressors faced by healthcare workers during the COVID-19 pandemic and their impact on SOC. Age, length of service, geographic location, and social status were significant factors influencing SOC levels. Targeted interventions are needed to enhance SOC and well-being, particularly for younger and newly employed healthcare workers. Strategies promoting social connections, work-life balance, and psychological support services are crucial to support healthcare workers' resilience and coping abilities.
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COVID-19 , Senso de Coerência , Humanos , COVID-19/epidemiologia , Estudos Transversais , Pandemias , Pessoal de Saúde , Itália/epidemiologiaRESUMO
Introduction: Pediatric diffuse midline gliomas (DMG), H3 K27- altered, are the most aggressive pediatric central nervous system (CNS) malignancies. Disease outcome is dismal with a median survival of less than one year. Extra-neural metastases are an unusual occurrence in DMG and have been rarely described. Methods and results: Here, we report on two pediatric patients affected by DMG with extra-neural dissemination. Their clinical, imaging, and molecular characteristics are reported here. An 11-year-old male 5 months after the diagnosis of diffuse intrinsic pontine glioma (DIPG) developed metastatic osseous lesions confirmed with computed tomography (CT) guided biopsy of the left iliac bone. The patient died one month after the evidence of metastatic progression. Another 11-year-old female was diagnosed with a cerebellar H3K27- altered DMG. After six months, she developed diffuse sclerotic osseous lesions. A CT-guided biopsy of the right iliac bone was non-diagnostic. She further developed multifocal chest and abdominal lymphadenopathy and pleural effusions. Droplet digital polymerase chain reaction (ddPCR) on pleural effusion revealed the presence of H3.3A mutation (c.83A>T, p.K28M). The patient died 24 months after the diagnosis of DMG and 3 months after the evidence of metastatic pleural effusion. Discussion: Extra-neural metastasis of DMG is a rare event and no standard therapy exists. An accurate and early diagnosis is necessary in order to develop a personalized plan of treatment. Further research is needed to gain further insights into the molecular pathology of DMG, H3K27- altered and improve the quality of life and the final outcome of patients with this deadly disease.
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BACKGROUND: Cholesteatoma is caused by disorders of the middle ear ventilation that trigger a progressive series of events responsible for its formation. The aim of this study was to identify possible radiological CT-derived parameters predisposing to ventilation disorders and cholesteatoma. METHODS: In this retrospective study, patients diagnosed with cholesteatomatous chronic otitis media who underwent temporal bone CT and open tympanoplasty surgery have been included, as well as control patients with clinical examination negative for organic otological pathology who underwent temporal bone CT for other reasons. For each patient, the following parameters have been extracted from CT volumes: degree of mastoid pneumatization, prominence of the cog, patency of the Eustachian tube, antrum width, aditus width, anterior and posterior epitympanic widths, and epitympanic height. RESULTS: Sixty patients have been included, thirty of whom belonged to the group of patients with cholesteatoma and the remaining part to the group of patients without organic otological pathology. The prevalence of a low degree of mastoid pneumatization was significantly higher among patients with cholesteatoma, as well as for the prevalence of cog prominence (p < 0.001). All the continuous variables were found to have statistical significance (p < 0.05) in the comparison between groups except for the width of the antrum. CONCLUSION: Mastoid pneumatization degree, prominence of the cog and epitympanic measures based on temporal bone CT could be good radiological correlates of the ventilatory capabilities of the epitympanum which, if compromised, can facilitate the development of cholesteatoma.
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Colesteatoma da Orelha Média , Humanos , Colesteatoma da Orelha Média/diagnóstico por imagem , Estudos Retrospectivos , Osso Temporal/diagnóstico por imagem , Processo Mastoide/diagnóstico por imagem , Processo Mastoide/patologia , Tomografia Computadorizada por Raios XRESUMO
Tumors arising inside the ventricular system are rare but represent a difficult diagnostic and therapeutic challenge. They usually are diagnosed when reaching a big volume and tend to affect young children. There is a wide broad of differential diagnoses with significant variability in anatomical aspects and tumor type. Differential diagnosis in tumor type includes choroid plexus tumors (papillomas and carcinomas), ependymomas, subependymomas, subependymal giant cell astrocytomas (SEGAs), central neurocytomas, meningiomas, and metastases. Choroid plexus tumors, ependymomas of the posterior fossa, and SEGAs are more likely to appear in childhood, whereas subependymomas, central neurocytomas, intraventricular meningiomas, and metastases are more frequent in adults. This chapter is predominantly focused on choroid plexus tumors and radiological and histological differential diagnosis. Treatment is discussed in the light of the modern acquisition in genetics and epigenetics of brain tumors.
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Neoplasias do Plexo Corióideo , Ependimoma , Glioma Subependimal , Neurocitoma , Criança , Adulto , Humanos , Pré-Escolar , Plexo Corióideo , Neoplasias do Plexo Corióideo/diagnóstico , Neoplasias do Plexo Corióideo/genética , Neoplasias do Plexo Corióideo/terapia , Ependimoma/diagnóstico , Ependimoma/genética , Ependimoma/terapiaRESUMO
BACKGROUND: Brain parenchyma (BP) and intracranial cerebrospinal fluid (iCSF) volumes measured by fully automated segmentation of clinical brain MRI studies may be useful for the diagnosis and follow-up of pediatric hydrocephalus. However, previously published segmentation techniques either rely on dedicated sequences, not routinely used in clinical practice, or on spatial normalization, which has limited accuracy when severe brain distortions, such as in hydrocephalic patients, are present. PURPOSE: We developed a fully automated method to measure BP and iCSF volumes from clinical brain MRI studies of pediatric hydrocephalus patients, exploiting the complementary information contained in T2- and T1-weighted images commonly used in clinical practice. METHODS: The proposed procedure, following skull-stripping of the combined volumes, performed using a multiparametric method to obtain a reliable definition of the inner skull profile, maximizes the CSF-to-parenchyma contrast by dividing the T2w- by the T1w- volume after full-scale dynamic rescaling, thus allowing separation of iCSF and BP through a simple thresholding routine. RESULTS: Validation against manual tracing on 23 studies (four controls and 19 hydrocephalic patients) showed excellent concordance (ICC > 0.98) and spatial overlap (Dice coefficients ranging from 77.2% for iCSF to 96.8% for intracranial volume). Accuracy was comparable to the intra-operator reproducibility of manual segmentation, as measured in 14 studies processed twice by the same experienced neuroradiologist. Results of the application of the algorithm to a dataset of 63 controls and 57 hydrocephalic patients (19 with parenchymal damage), measuring volumes' changes with normal development and in hydrocephalic patients, are also reported for demonstration purposes. CONCLUSIONS: The proposed approach allows fully automated segmentation of BP and iCSF in clinical studies, also in severely distorted brains, enabling to assess age- and disease-related changes in intracranial tissue volume with an accuracy comparable to expert manual segmentation.
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Hidrocefalia , Humanos , Criança , Reprodutibilidade dos Testes , Hidrocefalia/diagnóstico por imagem , Encéfalo/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodos , Cabeça , Processamento de Imagem Assistida por Computador/métodosRESUMO
Perivascular spaces (PVSs) are small extensions of the subpial cerebrospinal space, pial-lined and interstitial fluid-filled. They surround small penetrating arteries, and veins, crossing the subarachnoid space to the brain tissue. Magnetic Resonance Imaging (MRI) shows a PVS as a round-shape or linear structure, isointense to the cerebrospinal fluid, and, if larger than 1.5 cm, they are known as giant/tumefactive PVSs (GTPVS) that may compress neighboring parenchymal/liquoral compartment. We report a rare asymptomatic case of GTPVS type 1 in a diabetic middle-aged patient, occasionally discovered. Our MRI study focuses on diffusion/tractography and fusion imaging: three-dimensional (3D) constructive interference in steady state (CISS) and time of fly (TOF) sequences. The advanced and fusion MR techniques help us to track brain fiber to assess brain tissue compression consequences and some PVS anatomic features as the perforating arteries inside them.
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BACKGROUND: Dandy-Walker malformation (DWM) is a posterior fossa malformation characterized by a huge posterior fossa cyst in communication with the fourth ventricle. Hydrocephalus is associated with more than 80% of cases and is usually treated by shunting. Despite infection being a common complication of the shunt, abscess formation within the cyst was reported only once. CASE REPORT: A neonate affected by DWM developed a posterior fossa abscess following a shunt infection. The purulent collection was refractory to standard treatment (antibiotics and burr hole drainage); therefore, an endoscopic approach was performed in order to remove the purulent collection under direct vision. This material was aspirated with the help of an endoscopic ultrasonic aspirator. The outcome was favorable, with a resolution of infection and re-implantation of the ventriculo-peritoneal shunt. Surprisingly, post-operative radiological examination showed substantial modification of the anatomy of the posterior fossa with disappearing of the Dandy-Walker cyst. To the best of our knowledge, this is the first documented report of a true Dandy-Walker malformation that modified its anatomical appearance over time. DISCUSSION AND CONCLUSION: Endoscopic aspiration of intracranial purulent collection should be considered a valid option to manage complicated cases. An endoscopic ultrasonic aspirator may make the procedure more effective and faster.
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Cistos , Síndrome de Dandy-Walker , Recém-Nascido , Humanos , Síndrome de Dandy-Walker/complicações , Síndrome de Dandy-Walker/diagnóstico por imagem , Síndrome de Dandy-Walker/cirurgia , Abscesso/cirurgia , Ultrassom , Ventriculostomia/métodos , Cistos/cirurgia , Imageamento por Ressonância MagnéticaRESUMO
The quality of the relationship between caregiver and child has long-term effects on the cognitive and socio-emotional development of children. A process involved in human parenting is the bio-behavioural synchrony that occurs between the partners in the relationship during interaction. Through interaction, bio-behavioural synchronicity allows the adaptation of the physiological systems of the parent to those of the child and promotes the positive development and modelling of the child's social brain. The role of bio-behavioural synchrony in building social bonds could be investigated using functional near-infrared spectroscopy (fNIRS). In this paper we have (a) highlighted the importance of the quality of the caregiver-child relationship for the child's cognitive and socio-emotional development, as well as the relevance of infantile stimuli in the activation of parenting behaviour; (b) discussed the tools used in the study of the neurophysiological substrates of the parental response; (c) proposed fNIRS as a particularly suitable tool for the study of parental responses; and (d) underlined the need for a multi-systemic psychobiological approach to understand the mechanisms that regulate caregiver-child interactions and their bio-behavioural synchrony. We propose to adopt a multi-system psychobiological approach to the study of parental behaviour and social interaction.
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Neurociências , Poder Familiar , Humanos , Poder Familiar/psicologia , Espectroscopia de Luz Próxima ao Infravermelho , Emoções , EncéfaloRESUMO
BACKGROUND: An electrical injury can cause multiple consequences, especially to the nervous system, both peripheral and central. Such consequences may present immediately as well as later on. AIMS OF THE STUDY: To report on a case of a 5-year-old boy with focal refractory status epilepticus after an electrical injury. METHODS: Clinical history, electroencephalography, neuroimaging, and laboratory data of a patient admitted to our emergency department. RESULTS: A 5-year-old male received an electrical shock by contact with an alternating current source after coming out of the pool. When reaching our emergency department, focal seizures was observed in the same site affected by the electrical insult, with progressive structural changes in the related brain area. In the days after, his neurological conditions dramatically evolved leading to brain death. CONCLUSIONS: Based on our knowledge, this is the first report on refractory status epilepticus in a child after electrical injury. The possible underlying pathogenetic mechanisms are not yet clear.
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Estado Epiléptico , Masculino , Criança , Humanos , Pré-Escolar , Estado Epiléptico/etiologia , Convulsões/patologia , Eletroencefalografia , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Serviço Hospitalar de EmergênciaRESUMO
Parkinson's disease (PD) is a chronic progressive neurodegenerative disorder characterized by motor and non-motor disturbances as a result of a complex and not fully understood pathogenesis, probably including neuroinflammation, oxidative stress, and formation of alpha-synuclein (α-syn) aggregates. As age is the main risk factor for several neurodegenerative disorders including PD, progressive aging of the immune system leading to inflammaging and immunosenescence may contribute to neuroinflammation leading to PD onset and progression; abnormal α-syn aggregation in the context of immune dysfunction may favor activation of nucleotide-binding oligomerization domain-like receptor (NOD) family pyrin domain containing 3 (NLRP3) inflammasome within microglial cells through interaction with toll-like receptors (TLRs). This process would further lead to activation of Caspase (Cas)-1, and increased production of pro-inflammatory cytokines (PC), with subsequent impairment of mitochondria and damage to dopaminergic neurons. All these phenomena are mediated by the translocation of nuclear factor kappa-B (NF-κB) and enhanced by reactive oxygen species (ROS). To date, drugs to treat PD are mainly aimed at relieving clinical symptoms and there are no disease-modifying options to reverse or stop disease progression. This review outlines the role of the TLR/NLRP3/Cas-1 pathway in PD-related immune dysfunction, also focusing on specific therapeutic options that might be used since the early stages of the disease to counteract neuroinflammation and immune dysfunction.
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Inflamassomos , Doença de Parkinson , Humanos , Inflamassomos/metabolismo , Doença de Parkinson/metabolismo , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Doenças Neuroinflamatórias , Receptores Toll-Like/metabolismo , Microglia/patologiaRESUMO
Carbon nanomaterials are an inventive class of materials with wide applications in state-of-the-art bioimaging and therapeutics. They allow a broad range of tunable and integrated advantages of structural flexibility, chemical and thermal stability, upright electrical conductivity, and the option of scale-up and mass production. In the context of nanomedicine, carbon nanomaterials have been used extensively to mitigate the serious side effects of conventional chemotherapy and also to enable early cancer diagnostics, given their wide range of tunable properties. A class of carbon nanomaterials, called carbon dots (CDs) are small carbon-based nanoparticles and have been a valued discovery due to their photoluminescence, low photobleaching, and high surface area to mass ratio. The process of producing these CDs had so far been a high energy demanding process involving wet chemistry for purification. A one-step tunable production of luminescent CDs from fuel rich combustion reactors was recently presented by our group. In this paper, we explore the effects of these yellow luminescent combustion-generated CDs in MCF7 adenocarcinoma and MCF10a normal breast epithelial cells. We observed that these CDs, also at nontoxic doses, can affect basic cellular functions, such as cell cycle and proliferation; induce substantial changes on the physical parameters of the plasma membrane; and change the overall appearance of a cell in terms of morphology.
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Nanoestruturas , Pontos Quânticos , Pontos Quânticos/toxicidade , Pontos Quânticos/química , Carbono/toxicidade , Carbono/química , Nanoestruturas/químicaRESUMO
Background: An emerging body of evidence indicates an association between anthropogenic particulate matter (PM) and neurodegeneration. Although the historical focus of PM toxicity has been on the cardiopulmonary system, ultrafine PM particles can also exert detrimental effects in the brain. However, only a few studies are available on the harmful interaction between PM and CNS and on the putative pathomechanisms. Methods: Ultrafine PM particles with a diameter < 0.1 µm (PM0.1) and nanoparticles < 20 nm (NP20) were sampled in a lab-scale combustion system. Their effect on cell tracking in the space was studied by time-lapse and high-content microscopy in NSC-34 motor neurons while pHrodo™ Green conjugates were used to detect PM endocytosis. Western blotting analysis was used to quantify protein expression of lysosomal channels (i.e., TRPML1 and TPC2) and autophagy markers. Current-clamp electrophysiology and Fura2-video imaging techniques were used to measure membrane potential, intracellular Ca2+ homeostasis and TRPML1 activity in NSC-34 cells exposed to PM0.1 and NP20. Results: NP20, but not PM0.1, reduced NSC-34 motor neuron movement in the space. Furthermore, NP20 was able to shift membrane potential of motor neurons toward more depolarizing values. PM0.1 and NP20 were able to enter into the cells by endocytosis and exerted mitochondrial toxicity with the consequent stimulation of ROS production. This latter event was sufficient to determine the hyperactivation of the lysosomal channel TRPML1. Consequently, both LC3-II and p62 protein expression increased after 48 h of exposure together with AMPK activation, suggesting an engulfment of autophagy. The antioxidant molecule Trolox restored TRPML1 function and autophagy. Conclusions: Restoring TRPML1 function by an antioxidant agent may be considered a protective mechanism able to reestablish autophagy flux in motor neurons exposed to nanoparticles.
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Material Particulado , Canais de Potencial de Receptor Transitório , Material Particulado/toxicidade , Material Particulado/análise , Antioxidantes/farmacologia , Lisossomos/metabolismo , Autofagia , Neurônios Motores/metabolismo , Canais de Potencial de Receptor Transitório/metabolismoAssuntos
Vacinas contra Influenza , Influenza Humana , Humanos , Saúde Pública , Vacinação , Instalações de Saúde , Atenção à SaúdeRESUMO
Health visitors (HVs) and environmental health officers (EHOs) are the healthcare workers (HCWs) who, in the Italian National Health Service, mainly operate in the prevention departments of local health authorities, guaranteeing the territorial activities specifically declared with the respective professional profiles. During the SARS-CoV-2 pandemic, it was necessary to reallocate all HCWs supporting Hygiene and Public Health Services involved on the front lines of the emergency, in order to perform preventive activities and to take immediate action to fight the spread of the virus. By means of an IT survey consisting of three sections, this study investigated how 960 HVs and EHOs dealt with this reallocation, with the shifting in service assignment, and with the perceived level of fatigue and pressure, through the application of skills acquired from university training. The synergy among the preventive health professions, the ability to work in a multi-professional team, and the complementary training of HCWs represent the main strengths for overcoming future public health challenges, aimed at protecting human health.
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Nodular fasciitis (NF) is a benign fibroblastic and myofibroblastic proliferation of subcutaneous tissues. Rarely, it has been identified in the ear and more rarely in children. We describe a case in a four-year-old girl and the surgical management of it. The patient was referred to the otolaryngology unit of a tertiary referral center because she was affected by a painless and growing lesion in the left external auditory canal (EAC). The girl was treated by large-spectrum antibiotic therapy for one week without success. For this reason, we requested ultrasonography (US) of the left hemiface, maxillofacial and temporal bone computed tomography (CT) and magnetic resonance imaging (MRI) of the head with and without contrast. The imaging identified an irregular ovoid hypoechoic nodule with distinct margins indissociable from the cartilaginous planes and extending into the parotid loggia with local infiltration of the fascia. The lesion was surgically removed through preauricular access due its extension into the parotid area. The mass was excised in toto and sent to the pathologist for immunohistochemistry. The histopathologist based on the finding diagnosed a nodular fasciitis. In case of suspicion of malignancy, early investigations should be done to evaluate the lesion, then a traditional parotidectomy can be safely and successfully performed even in a very young child. The open technique allows the removal of NF with full control of the surgical area and facial nerve. In this article, we presented the management of a case in a 4-year-old female affected by NF of the external auditory canal (EAC), and we described clinical and surgical management of the case. We also reviewed literature of nodular fasciitis cases of ears in children.