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1.
Int J Mol Sci ; 24(14)2023 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-37511281

RESUMO

Total bilateral Limbal Stem Cell Deficiency is a pathologic condition of the ocular surface due to the loss of corneal stem cells. Cultivated oral mucosa epithelial transplantation (COMET) is the only autologous successful treatment for this pathology in clinical application, although abnormal peripheric corneal vascularization often occurs. Properly characterizing the regenerated ocular surface is needed for a reliable follow-up. So far, the univocal identification of transplanted oral mucosa has been challenging. Previously proposed markers were shown to be co-expressed by different ocular surface epithelia in a homeostatic or perturbated environment. In this study, we compared the transcriptome profile of human oral mucosa, limbal and conjunctival cultured holoclones, identifying Paired Like Homeodomain 2 (PITX2) as a new marker that univocally distinguishes the transplanted oral tissue from the other epithelia. We validated PITX2 at RNA and protein levels to investigate 10-year follow-up corneal samples derived from a COMET-treated aniridic patient. Moreover, we found novel angiogenesis-related factors that were differentially expressed in the three epithelia and instrumental in explaining the neovascularization in COMET-treated patients. These results will support the follow-up analysis of patients transplanted with oral mucosa and provide new tools to understand the regeneration mechanism of transplanted corneas.


Assuntos
Células Epiteliais , Mucosa Bucal , Humanos , Seguimentos , Células Epiteliais/metabolismo , Células Cultivadas , Epitélio , Transplante de Células-Tronco/métodos , Transplante Autólogo
2.
Leukemia ; 37(5): 1068-1079, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36928007

RESUMO

Clonal myeloproliferation and development of bone marrow (BM) fibrosis are the major pathogenetic events in myelofibrosis (MF). The identification of novel antifibrotic strategies is of utmost importance since the effectiveness of current therapies in reverting BM fibrosis is debated. We previously demonstrated that osteopontin (OPN) has a profibrotic role in MF by promoting mesenchymal stromal cells proliferation and collagen production. Moreover, increased plasma OPN correlated with higher BM fibrosis grade and inferior overall survival in MF patients. To understand whether OPN is a druggable target in MF, we assessed putative inhibitors of OPN expression in vitro and identified ERK1/2 as a major regulator of OPN production. Increased OPN plasma levels were associated with BM fibrosis development in the Romiplostim-induced MF mouse model. Moreover, ERK1/2 inhibition led to a remarkable reduction of OPN production and BM fibrosis in Romiplostim-treated mice. Strikingly, the antifibrotic effect of ERK1/2 inhibition can be mainly ascribed to the reduced OPN production since it could be recapitulated through the administration of anti-OPN neutralizing antibody. Our results demonstrate that OPN is a novel druggable target in MF and pave the way to antifibrotic therapies based on the inhibition of ERK1/2-driven OPN production or the neutralization of OPN activity.


Assuntos
Osteopontina , Mielofibrose Primária , Mielofibrose Primária/tratamento farmacológico , Mielofibrose Primária/metabolismo , Mielofibrose Primária/patologia , Animais , Camundongos , Modelos Animais de Doenças , Transdução de Sinais/efeitos dos fármacos , Osteopontina/antagonistas & inibidores , Osteopontina/sangue , Osteopontina/metabolismo , Fibrose/tratamento farmacológico , Humanos
3.
Neurol Sci ; 43(8): 5133-5141, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35648267

RESUMO

PURPOSE: To establish whether a slow or a rapid withdrawal of antiepileptic monotherapy influences relapse rate in seizure-free adults with epilepsy and calculates compliance and differences in the severity of relapses, based on the occurrence of status epilepticus, seizure-related injuries, and death. METHODS: This is a multicentre, prospective, randomized, open label, non-inferiority trial in people aged 16 + years who were seizure-free for more than 2 years. Patients were randomized to slow withdrawal (160 days) or rapid withdrawal (60 days) and were followed for 12 months. The primary outcome was the probability of a first seizure relapse within the 12-months follow-up. The secondary outcomes included the cumulative probability of relapse at 3, 6, 9, and 12 months. A non-inferiority analysis was performed with non-inferiority margin of - 0.15 for the difference between the probabilities of seizure recurrence in slow versus rapid withdrawal. RESULTS: The sample comprised 48 patients, 25 randomized to slow withdrawal and 23 to rapid withdrawal. Median follow-up was 11.9 months. In the intention-to-treat population, 3 patients in the slow-withdrawal group and 1 in the rapid withdrawal group experienced seizure relapses. The corresponding probabilities of seizure recurrence were 0.12 for slow withdrawal and 0.04 for rapid withdrawal, giving a difference of 0.08 (95% CI - 0.12; 0.27), which is entirely above the non-inferiority margin. No patients developed status epilepticus and seizure-related injuries or died. Risks were similar in the Per-Protocol population. CONCLUSIONS: Seizure-relapse rate after drug discontinuation is lower than in other reports, without complications and unrelated to the duration of tapering.


Assuntos
Epilepsia , Estado Epiléptico , Adulto , Anticonvulsivantes/uso terapêutico , Epilepsia/tratamento farmacológico , Humanos , Recidiva Local de Neoplasia/tratamento farmacológico , Estudos Prospectivos , Recidiva , Convulsões/tratamento farmacológico , Estado Epiléptico/tratamento farmacológico
4.
Int J Mol Sci ; 23(10)2022 May 21.
Artigo em Inglês | MEDLINE | ID: mdl-35628593

RESUMO

Total bilateral Limbal Stem Cells Deficiency is a pathologic condition of the ocular surface due to loss or impairment of corneal stem cell function, altering homeostasis of the corneal epithelium. Cultivated Oral Mucosa Epithelial Transplantation (COMET) is the only autologous treatment for this pathology. During the follow-up, a proper characterization of the transplanted oral mucosa on the ocular surface supports understanding the regenerative process. The previously proposed markers for oral mucosa identification (e.g., keratins 3 and 13) are co-expressed by corneal and conjunctival epithelia. Here, we propose a new specific marker to distinguish human oral mucosa from the epithelia of the ocular surface. We compared the transcriptome of holoclones (stem cells) from the human oral mucosa, limbal and conjunctival cultures by microarray assay. High expression of SOX2 identified the oral mucosa vs. cornea and conjunctiva, while PAX6 was highly expressed in corneal and conjunctival epithelia. The transcripts were validated by qPCR, and immunological methods identified the related proteins. Finally, the proposed markers were used to analyze a 10-year follow-up aniridic patient treated by COMET. These findings will support the follow-up analysis of COMET treated patients and help to shed light on the mechanism of corneal repair and regeneration.


Assuntos
Doenças da Córnea , Epitélio Corneano , Biomarcadores , Córnea/patologia , Doenças da Córnea/genética , Doenças da Córnea/metabolismo , Doenças da Córnea/patologia , Humanos , Mucosa Bucal/patologia , Fatores de Transcrição SOXB1/genética , Fatores de Transcrição SOXB1/metabolismo , Células-Tronco/metabolismo
5.
Eur J Neurol ; 29(6): 1663-1684, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35194889

RESUMO

BACKGROUND AND PURPOSE: Despite the increasing number of reports on the spectrum of neurological manifestations of COVID-19 (neuro-COVID), few studies have assessed short- and long-term outcome of the disease. METHODS: This is a cohort study enrolling adult patients with neuro-COVID seen in neurological consultation. Data were collected prospectively or retrospectively in the European Academy of Neurology NEuro-covid ReGistrY ((ENERGY). The outcome at discharge was measured using the modified Rankin Scale and defined as 'stable/improved' if the modified Rankin Scale score was equal to or lower than the pre-morbid score, 'worse' if the score was higher than the pre-morbid score. Status at 6 months was also recorded. Demographic and clinical variables were assessed as predictors of outcome at discharge and 6 months. RESULTS: From July 2020 to March 2021, 971 patients from 19 countries were included. 810 (83.4%) were hospitalized. 432 (53.3%) were discharged with worse functional status. Older age, stupor/coma, stroke and intensive care unit (ICU) admission were predictors of worse outcome at discharge. 132 (16.3%) died in hospital. Older age, cancer, cardiovascular complications, refractory shock, stupor/coma and ICU admission were associated with death. 262 were followed for 6 months. Acute stroke or ataxia, ICU admission and degree of functional impairment at discharge were predictors of worse outcome. 65/221 hospitalized patients (29.4%) and 10/32 non-hospitalized patients (24.4%) experienced persisting neurological symptoms/signs. 10/262 patients (3.8%) developed new neurological complaints during the 6 months of follow-up. CONCLUSIONS: Neuro-COVID is a severe disease associated with worse functional status at discharge, particularly in older subjects and those with comorbidities and acute complications of infection.


Assuntos
COVID-19 , Neurologia , Acidente Vascular Cerebral , Estupor , Adulto , Idoso , COVID-19/complicações , Estudos de Coortes , Coma , Humanos , Unidades de Terapia Intensiva , Estudos Retrospectivos , SARS-CoV-2 , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/terapia
6.
Antioxidants (Basel) ; 11(1)2022 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-35052617

RESUMO

Myelofibrosis (MF) is the Philadelphia-negative myeloproliferative neoplasm characterized by the worst prognosis and no response to conventional therapy. Driver mutations in JAK2 and CALR impact on JAK-STAT pathway activation but also on the production of reactive oxygen species (ROS). ROS play a pivotal role in inflammation-induced oxidative damage to cellular components including DNA, therefore leading to greater genomic instability and promoting cell transformation. In order to unveil the role of driver mutations in oxidative stress, we assessed ROS levels in CD34+ hematopoietic stem/progenitor cells of MF patients. Our results demonstrated that ROS production in CD34+ cells from CALR-mutated MF patients is far greater compared with patients harboring JAK2 mutation, and this leads to increased oxidative DNA damage. Moreover, CALR-mutant cells show less superoxide dismutase (SOD) antioxidant activity than JAK2-mutated ones. Here, we show that high plasma levels of total antioxidant capacity (TAC) correlate with detrimental clinical features, such as high levels of lactate dehydrogenase (LDH) and circulating CD34+ cells. Moreover, in JAK2-mutated patients, high plasma level of TAC is also associated with a poor overall survival (OS), and multivariate analysis demonstrated that high TAC classification is an independent prognostic factor allowing the identification of patients with inferior OS in both DIPSS lowest and highest categories. Altogether, our data suggest that a different capability to respond to oxidative stress can be one of the mechanisms underlying disease progression of myelofibrosis.

7.
Artigo em Inglês | MEDLINE | ID: mdl-34964422

RESUMO

Background: Amyotrophic lateral sclerosis (ALS) is a rare neurodegenerative disease that causes a wide range of symptoms demanding treatment, but the evidence base for their effectiveness is limited. Affected individuals may present several comorbidities. Polypharmacy exposes ALS patients to the adverse effects of drugs and to drug-drug interactions. At present, no data on drug-drug and drug-disease interactions are available in patients with ALS. Methods: Multicenter, case-series, observational study aimed to provide a picture of the therapeutic habits of patients with ALS, and identify drug-drug interactions (DDIs) and their effects on the outcome of the disease (measured by ALSFRS-R) and quality of life (ALSAQ-40). Results: 440 patients were included, 50 of them with follow-up data. The maximum number of DDIs at baseline was 2 for minor, 9 for moderate, 3 for major, and 3 for contraindicated interactions. At least one minor, moderate, major, or contraindicated DDI was present in 18 (4.1%), 127 (28.9%), 46 (10.5%) and 37 (8.4%) patients. Patients with DDIs were older. In those with major/contraindicated DDIs, the scores on the emotional domain of the ALSAQ-40 and the ALSFRS-R total score were worse than the scores of patients without DDIs or with minor/moderate DDIs. At the 48-week visit, patients with DDIs showed lower ALSFRS-R scores, and higher scores on all domains of ALSAQ-40, as compared to patients without DDIs. Conclusions: Symptomatic treatment aims to improve quality of life of patients. The higher the number of drugs, the higher the risk to incurring (relevant) interactions.


Assuntos
Esclerose Lateral Amiotrófica , Doenças Neurodegenerativas , Esclerose Lateral Amiotrófica/diagnóstico , Progressão da Doença , Humanos , Qualidade de Vida , Inquéritos e Questionários
8.
Cancers (Basel) ; 13(19)2021 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-34638230

RESUMO

Long non-coding RNAs (lncRNAs) have been recently described as key mediators in the development of hematological malignancies. In the last years, circulating lncRNAs have been proposed as a new class of non-invasive biomarkers for cancer diagnosis and prognosis and to predict treatment response. The present study is aimed to investigate the potential of circulating lncRNAs as non-invasive prognostic biomarkers in myelofibrosis (MF), the most severe among Philadelphia-negative myeloproliferative neoplasms. We detected increased levels of seven circulating lncRNAs in plasma samples of MF patients (n = 143), compared to healthy controls (n = 65). Among these, high levels of LINC01268, MALAT1 or GAS5 correlate with detrimental clinical variables, such as high count of leukocytes and CD34+ cells, severe grade of bone marrow fibrosis and presence of splenomegaly. Strikingly, high plasma levels of LINC01268 (p = 0.0018), GAS5 (p = 0.0008) or MALAT1 (p = 0.0348) are also associated with a poor overall-survival while high levels of LINC01268 correlate with a shorter leukemia-free-survival. Finally, multivariate analysis demonstrated that the plasma level of LINC01268 is an independent prognostic variable, suggesting that, if confirmed in future in an independent patients' cohort, it could be used for further studies to design an updated classification model for MF patients.

9.
Blood Adv ; 5(5): 1452-1462, 2021 03 09.
Artigo em Inglês | MEDLINE | ID: mdl-33666652

RESUMO

Myelofibrosis (MF) belongs to the family of classic Philadelphia-negative myeloproliferative neoplasms (MPNs). It can be primary myelofibrosis (PMF) or secondary myelofibrosis (SMF) evolving from polycythemia vera (PV) or essential thrombocythemia (ET). Despite the differences, PMF and SMF patients are currently managed in the same way, and prediction of survival is based on the same clinical and genetic features. In the last few years, interest has grown concerning the ability of gene expression profiles (GEPs) to provide valuable prognostic information. Here, we studied the GEPs of granulocytes from 114 patients with MF, using a microarray platform to identify correlations with patient characteristics and outcomes. Cox regression analysis led to the identification of 201 survival-related transcripts characterizing patients who are at high risk for death. High-risk patients identified by this gene signature displayed an inferior overall survival and leukemia-free survival, together with clinical and molecular detrimental features included in contemporary prognostic models, such as the presence of high molecular risk mutations. The high-risk group was enriched in post-PV and post-ET MF and JAK2V617F homozygous patients, whereas pre-PMF was more frequent in the low-risk group. These results demonstrate that GEPs in MF patients correlate with their molecular and clinical features, particularly their survival, and represent the proof of concept that GEPs might provide complementary prognostic information to be applied in clinical decision making.


Assuntos
Transtornos Mieloproliferativos , Policitemia Vera , Mielofibrose Primária , Trombocitemia Essencial , Humanos , Policitemia Vera/diagnóstico , Policitemia Vera/genética , Mielofibrose Primária/diagnóstico , Mielofibrose Primária/genética , Trombocitemia Essencial/diagnóstico , Trombocitemia Essencial/genética , Transcriptoma
10.
NPJ Precis Oncol ; 5(1): 4, 2021 Feb 04.
Artigo em Inglês | MEDLINE | ID: mdl-33542466

RESUMO

Disease progression of myeloproliferative neoplasms is the result of increased genomic complexity. Since the ability to predict disease evolution is crucial for clinical decisions, we studied single-cell genomics and transcriptomics of CD34-positive cells from a primary myelofibrosis (PMF) patient who progressed to acute myeloid leukemia (AML) while receiving Ruxolitinib. Single-cell genomics allowed the reconstruction of clonal hierarchy and demonstrated that TET2 was the first mutated gene while FLT3 was the last one. Disease evolution was accompanied by increased clonal heterogeneity and mutational rate, but clones carrying TP53 and FLT3 mutations were already present in the chronic phase. Single-cell transcriptomics unraveled repression of interferon signaling suggesting an immunosuppressive effect exerted by Ruxolitinib. Moreover, AML transformation was associated with a differentiative block and immune escape. These results suggest that single-cell analysis can unmask tumor heterogeneity and provide meaningful insights about PMF progression that might guide personalized therapy.

11.
Int J Mol Sci ; 21(19)2020 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-33036143

RESUMO

Single-cell genomics has become the method of choice for the study of heterogeneous cell populations and represents an elective application in defining the architecture and clonal evolution in hematological neoplasms. Reconstructing the clonal evolution of a neoplastic population therefore represents the main way to understand more deeply the pathogenesis of the neoplasm, but it is also a potential tool to understand the evolution of the tumor population with respect to its response to therapy. Pre-analytical phase for single-cell genomics analysis is crucial to obtain a cell population suitable for single-cell sorting, and whole genome amplification is required to obtain the necessary amount of DNA from a single cell in order to proceed with sequencing. Here, we evaluated the impact of different methods of cellular immunostaining, fixation and whole genome amplification on the efficiency and yield of single-cell sequencing.


Assuntos
Evolução Clonal , Genômica/métodos , Neoplasias Hematológicas/genética , Células-Tronco Hematopoéticas , Técnicas de Amplificação de Ácido Nucleico/métodos , Linhagem Celular , Genoma Humano , Humanos , Células K562 , Análise de Célula Única/métodos
12.
J Neurol Neurosurg Psychiatry ; 91(10): 1092-1099, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32868387

RESUMO

OBJECTIVES: To determine the prevalence of different comorbidities in chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), and their impact on outcome, treatment choice and response. METHODS: Using a structured questionnaire, we collected information on comorbidities from 393 patients with CIDP fulfilling the European Federation of Neurological Societies and Peripheral Nerve Society criteria included in the Italian CIDP database. RESULTS: One or more comorbidities were reported by 294 patients (75%) and potentially influenced treatment choice in 192 (49%) leading to a less frequent use of corticosteroids. Response to treatment did not differ, however, from that in patients without comorbidities. Diabetes (14%), monoclonal gammopathy of undetermined significance (MGUS) (12%) and other immune disorders (16%) were significantly more frequent in patients with CIDP than expected in the general European population. Patients with diabetes had higher disability scores, worse quality of life and a less frequent treatment response compared with patients without diabetes. Patients with IgG-IgA or IgM MGUS had an older age at CIDP onset while patients with other immune disorders had a younger age at onset and were more frequently females. IgM MGUS was more frequent in patients with motor CIDP than in patients with typical CIDP. CONCLUSIONS: Comorbidities are frequent in patients with CIDP and in almost 50% of them have an impact on treatment choice. Diabetes, MGUS and other immune diseases are more frequent in patients with CIDP than in the general population. Only diabetes seems, however, to have an impact on disease severity and treatment response possibly reflecting in some patients a coexisting diabetic neuropathy.


Assuntos
Diabetes Mellitus/epidemiologia , Neuropatias Diabéticas/epidemiologia , Gamopatia Monoclonal de Significância Indeterminada/epidemiologia , Polirradiculoneuropatia Desmielinizante Inflamatória Crônica/epidemiologia , Adolescente , Corticosteroides/uso terapêutico , Adulto , Idade de Início , Idoso , Idoso de 80 Anos ou mais , Doenças Autoimunes/epidemiologia , Criança , Comorbidade , Feminino , Humanos , Imunoglobulinas Intravenosas/uso terapêutico , Fatores Imunológicos/uso terapêutico , Itália/epidemiologia , Masculino , Pessoa de Meia-Idade , Troca Plasmática , Polirradiculoneuropatia Desmielinizante Inflamatória Crônica/terapia , Qualidade de Vida , Distribuição por Sexo , Resultado do Tratamento , Adulto Jovem
13.
J Neurol ; 267(9): 2683-2691, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32430573

RESUMO

A few observational studies and randomized trials suggest that exercise and rehabilitation may improve activity limitation and quality of life (QoL) in patients with chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), but the impact of other modifiable factors on the severity of the disease is not well understood. Using a structured questionnaire, we collected data on lifestyle and dietary habits of the patients included in the Italian CIDP database to investigate the possible influence of modifiable lifestyle factors on disability and QoL. Questionnaire data were available for 323 patients. The effect of lifestyle and dietary exposures on impairment, disability and QoL was evaluated using logistic regression models, adjusting for age, sex, disease duration, physical activity and smoking. Physical activity was associated with lower sensory impairment by the ISS scale, less disability by the INCAT and RODS scale and a better QoL in all the domains of EURO-QoL scale with the exception of anxiety/depression. None of the other parameters had an impact on these scales. This study adds evidence to the possible role of physical activity in improving symptom severity, disability and QoL in patients with CIDP. None of the other environmental factors investigated appeared to have an impact on the severity and health perception of CIDP.


Assuntos
Pessoas com Deficiência , Polirradiculoneuropatia Desmielinizante Inflamatória Crônica , Exercício Físico , Humanos , Itália , Qualidade de Vida
14.
J Neurol Sci ; 405: 116411, 2019 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-31476620

RESUMO

BACKGROUND: The impact of deep brain stimulation (DBS) on cognitive and urinary disorders, falls, and eventually hospitalizations and mortality in Parkinson's disease (PD) is still debated. OBJECTIVE: We compared the rates of dementia, mild cognitive impairment (MCI), urinary incontinence, nocturia, falls, hospitalizations, and mortality in a cohort of PD patients undergoing DBS with a cohort of medically-treated patients chosen as controls. METHODS: We conducted a retrospective pilot study in six Italian DBS centers. 91 PD patients receiving DBS and 91 age- and gender-matched controls receiving the best medical treatment alone with a minimum follow-up of one year were enrolled. Clinical data were collected from baseline to the last follow-up visit using an ad-hoc developed web-based system. RESULTS: The risk of dementia was similar in the two groups while patients in the surgical cohort had lower rates of MCI, urinary incontinence, nocturia, and falls. In contrast, the risk of hospital admissions related to PD was higher in the surgical cohort. However, when excluding hospitalizations related to DBS surgery, the difference between the two cohorts was not significant. The surgical cohort had a lower number of hospitalizations not related to PD. The risk of death was similar in the two groups. CONCLUSION: Despite a higher risk of hospitalization, patients receiving DBS had a lower rate of MCI, urinary incontinence, nocturia and falls, without evidence of an increased risk of dementia and mortality. Although these findings need to be confirmed in prospective studies, they seem to suggest that DBS may play a significant role in the management of non-motor symptoms and common complications of advanced PD.


Assuntos
Estimulação Encefálica Profunda/estatística & dados numéricos , Doença de Parkinson/terapia , Idoso , Estudos de Casos e Controles , Feminino , Hospitalização/estatística & dados numéricos , Humanos , Masculino , Pessoa de Meia-Idade , Doença de Parkinson/diagnóstico , Doença de Parkinson/mortalidade , Projetos Piloto , Estudos Retrospectivos
15.
Sci Rep ; 9(1): 10558, 2019 07 22.
Artigo em Inglês | MEDLINE | ID: mdl-31332222

RESUMO

Somatic mutations of calreticulin (CALR) have been described in approximately 60-80% of JAK2 and MPL unmutated Essential Thrombocythemia and Primary Myelofibrosis patients. CALR is an endoplasmic reticulum (ER) chaperone responsible for proper protein folding and calcium retention. Recent data demonstrated that the TPO receptor (MPL) is essential for the development of CALR mutant-driven Myeloproliferative Neoplasms (MPNs). However, the precise mechanism of action of CALR mutants haven't been fully unraveled. In this study, we showed that CALR mutants impair the ability to respond to the ER stress and reduce the activation of the pro-apoptotic pathway of the unfolded protein response (UPR). Moreover, our data demonstrated that CALR mutations induce increased sensitivity to oxidative stress, leading to increase oxidative DNA damage. We finally demonstrated that the downmodulation of OXR1 in CALR-mutated cells could be one of the molecular mechanisms responsible for the increased sensitivity to oxidative stress mediated by mutant CALR. Altogether, our data identify novel mechanisms collaborating with MPL activation in CALR-mediated cellular transformation. CALR mutants negatively impact on the capability of cells to respond to oxidative stress leading to genomic instability and on the ability to react to ER stress, causing resistance to UPR-induced apoptosis.


Assuntos
Calreticulina/genética , Calreticulina/metabolismo , Mutação INDEL , Estresse Oxidativo/genética , Resposta a Proteínas não Dobradas/genética , Transformação Celular Neoplásica/genética , Reparo do DNA/genética , Regulação para Baixo , Estresse do Retículo Endoplasmático/genética , Técnicas de Silenciamento de Genes , Humanos , Células K562 , Proteínas Mitocondriais/antagonistas & inibidores , Proteínas Mitocondriais/genética , Proteínas Mutantes/genética , Proteínas Mutantes/metabolismo , Fenantrenos/farmacologia , Mielofibrose Primária/genética , Mielofibrose Primária/metabolismo , Proteínas Recombinantes/genética , Proteínas Recombinantes/metabolismo , Superóxido Dismutase/metabolismo , Trombocitemia Essencial/genética , Trombocitemia Essencial/metabolismo , Transcriptoma
16.
Epilepsy Behav ; 101(Pt B): 106374, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31300383

RESUMO

Refractory status epilepticus (RSE) occurs in up to 30% of patients following resuscitation after cardiac arrest. The impact of aggressive treatment of postanoxic RSE on long-term neurological outcome remains uncertain. We investigated neurological outcome of cardiac arrest patients with RSE treated with a standardized aggressive protocol with antiepileptic drugs and anesthetics, compared with patients with other electroencephalographic (EEG) patterns. A prospective cohort of 166 consecutive patients with cardiac arrest in coma was stratified according to four independent EEG patterns (benign; RSE; generalized periodic discharges (GPDs); malignant nonepileptiform) and multimodal prognostic indicators. Primary outcomes were survival and cerebral performance category (CPC) at 6 months. Refractory status epilepticus occurred in 36 patients (21.7%) and was treated with an aggressive standardized protocol as long as multimodal prognostic indicators were not unfavorable. Refractory status epilepticus started after 3 ±â€¯2.3 days after cardiac arrest and lasted 4.7 ±â€¯4.3 days. A benign electroencephalographic patterns was recorded in 76 patients (45.8%), a periodic pattern (GPDs) in 13 patients (7.8%), and a malignant nonepileptiform EEG pattern in 41 patients (24.7%). The four EEG patterns were highly associated with different prognostic indicators (low flow time, clinical motor seizures, N20 responses, neuron-specific enolase (NSE), neuroimaging). Survival and good neurological outcome (CPC 1 or 2) at 6 months were 72.4% and 71.1% for benign EEG pattern, 54.3% and 44.4% for RSE, 15.4% and 0% for GPDs, and 2.4% and 0% for malignant nonepileptiform EEG pattern, respectively. Aggressive and prolonged treatment of RSE may be justified in cardiac arrest patients with favorable multimodal prognostic indicators. This article is part of the Special Issue "Proceedings of the 7th London-Innsbruck Colloquium on Status Epilepticus and Acute Seizures".


Assuntos
Anticonvulsivantes/uso terapêutico , Coma/complicações , Parada Cardíaca/complicações , Hipóxia/complicações , Estado Epiléptico/tratamento farmacológico , Idoso , Coma/fisiopatologia , Eletroencefalografia/métodos , Feminino , Parada Cardíaca/fisiopatologia , Humanos , Hipóxia/fisiopatologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Estado Epiléptico/etiologia , Estado Epiléptico/fisiopatologia , Resultado do Tratamento
17.
Transplant Proc ; 51(6): 1939-1945, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31303414

RESUMO

AIMS: Our aim was to review the rate of biliary duct stones (BDS) after liver transplantation (LT), risk factors, and treatments, and to identify predictive factors for their onset. METHODS: LTs performed in our center from 2004 to 2014 were studied. Risk factors for the onset of BDS were identified using univariable Cox's proportional hazards models. RESULTS: Three hundred and sixty-four grafts with 317 duct-to-duct end-to-end biliary anastomosis on a T-tube and 47 hepaticojejunal anastomosis (HJ) were analyzed. BDS were identified in 13 of 364 (3.5%) grafts, including 10 duct-to-duct end-to-end biliary anastomosis on a T-tube grafts (3.2%) and 3 HJ grafts (6.4%). Predictive factors for BDS were biliary strictures (hazard ratio [HR] 9.94; 95% confidence interval [95% CI] 3.25-30.4), bilirubin (HR 1.04; 95% CI 1.01-1.06, for 1 unit increase), Model for End-Stage Liver Disease score (HR 1.07; 95% CI 1.01-1.14, for 1 unit increase), surgery time (HR 1.04; 95% CI 1.01-1.08, for 10-minute increase), hepatocellular disease (HR 8.3; 95% CI 1.09-64.0), hepatic artery thrombosis (HR 6.71; 95% CI 1.47-30.6), and retransplantation (HR 3.69; 95% CI 1.02-13.43). Among 51 grafts (14%) with biliary strictures, female sex was identified as a risk factor for BDS (HR 5.19; 95% CI 1.29-20.98). Multimodality treatment of BDS was often successful but open surgery was still needed in 23% of them. One-, 5-, and 10-year graft survival was not influenced by the onset of BDS. CONCLUSION: Main predictive factor for BDS in liver grafts is biliary stricture. Recipient's age and body mass index failed to show any statistical importance. In grafts with biliary strictures, female sex is the main risk factor for BDS. In the absence of biliary strictures, hepatic artery thrombosis lead to an increase in the risk of BDS. Multimodality treatment of BDS is often successful. BDS do not influence outcome.


Assuntos
Ductos Biliares/cirurgia , Cálculos Biliares/etiologia , Jejuno/cirurgia , Transplante de Fígado/efeitos adversos , Complicações Pós-Operatórias/etiologia , Adolescente , Adulto , Anastomose Cirúrgica/efeitos adversos , Morte Encefálica , Colestase/complicações , Feminino , Cálculos Biliares/terapia , Sobrevivência de Enxerto , Humanos , Hepatopatias/complicações , Transplante de Fígado/métodos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/terapia , Modelos de Riscos Proporcionais , Fatores de Risco , Fatores Sexuais , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
18.
Neurology ; 91(23): e2153-e2162, 2018 12 04.
Artigo em Inglês | MEDLINE | ID: mdl-30381366

RESUMO

OBJECTIVE: To investigate neurologic outcome of patients with cardiac arrest with refractory status epilepticus (RSE) treated with a standardized aggressive protocol with antiepileptic drugs and anesthetics compared to patients with other EEG patterns. METHODS: In the prospective cohort study, 166 consecutive patients with cardiac arrest in coma were stratified according to 4 independent EEG patterns (benign, RSE, generalized periodic discharges [GPDs], malignant nonepileptiform) and multimodal prognostic indicators. Primary outcomes were survival and cerebral performance category (CPC) at 6 months. RESULTS: RSE occurred in 36 patients (21.7%) and was treated with an aggressive standardized protocol as long as multimodal prognostic indicators were not unfavorable. RSE started after 3 ± 2.3 days after cardiac arrest and lasted 4.7 ± 4.3 days. A benign EEG pattern was recorded in 76 patients (45.8%); a periodic pattern (GPDs) was seen in 13 patients (7.8%); and a malignant nonepileptiform EEG pattern was recorded in 41 patients (24.7%). The 4 EEG patterns were highly associated with different prognostic indicators (low-flow time, clinical motor seizures, N20 responses, neuron-specific enolase, neuroimaging). Survival and good neurologic outcome (CPC 1 or 2) at 6 months were 72.4% and 71.1% for benign EEG pattern, 54.3% and 44.4% for RSE, 15.4% and 0% for GPDs, and 2.4% and 0% for malignant nonepileptiform EEG pattern, respectively. CONCLUSIONS: Aggressive and prolonged treatment of RSE may be justified in patients with cardiac arrest with favorable multimodal prognostic indicators.


Assuntos
Hipóxia Encefálica , Estado Epiléptico/tratamento farmacológico , Estado Epiléptico/fisiopatologia , Adulto , Idoso , Anestésicos , Anticonvulsivantes/uso terapêutico , Estudos de Coortes , Coma/etiologia , Eletroencefalografia , Feminino , Parada Cardíaca/complicações , Parada Cardíaca/terapia , Humanos , Hipóxia Encefálica/etiologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Estado Epiléptico/etiologia , Resultado do Tratamento
19.
Mol Oncol ; 12(12): 2102-2123, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30259659

RESUMO

Primary myelofibrosis (PMF) is a myeloproliferative neoplasm characterized by an excessive production of pro-inflammatory cytokines resulting in chronic inflammation and genomic instability. Besides the driver mutations in JAK2, MPL, and CALR genes, the deregulation of miRNA expression may also contribute to the pathogenesis of PMF. To this end, we recently reported the upregulation of miR-382-5p in PMF CD34+ cells. In order to unveil the mechanistic details of the role of miR-382-5p in pathogenesis of PMF, we performed gene expression profiling of CD34+ cells overexpressing miR-382-5p. Among the downregulated genes, we identified superoxide dismutase 2 (SOD2), which is a predicted target of miR-382-5p. Subsequently, we confirmed miR-382-5p/SOD2 interaction by luciferase assay and we showed that miR-382-5p overexpression in CD34+ cells causes the decrease in SOD2 activity leading to reactive oxygen species (ROS) accumulation and oxidative DNA damage. In addition, our data indicate that inhibition of miR-382-5p in PMF CD34+ cells restores SOD2 function, induces ROS disposal, and reduces DNA oxidation. Since the pro-inflammatory cytokine transforming growth factor-ß1 (TGF-ß1) is a key player in PMF pathogenesis, we further investigated the effect of TGF-ß1 on ROS and miR-382-5p levels. Our data showed that TGF-ß1 treatment enhances miR-382-5p expression and reduces SOD2 activity leading to ROS accumulation. Finally, inhibition of TGF-ß1 signaling in PMF CD34+ cells by galunisertib significantly reduced miR-382-5p expression and ROS accumulation and restored SOD2 activity. As a whole, this study reports that TGF-ß1/miR-382-5p/SOD2 axis deregulation in PMF cells is linked to ROS overproduction that may contribute to enhanced oxidative stress and inflammation. Our results suggest that galunisertib may represent an effective drug reducing abnormal oxidative stress induced by TGF-ß1 in PMF patients. DATABASE LINKING: GEO: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE103464.


Assuntos
Antígenos CD34/metabolismo , MicroRNAs/metabolismo , Estresse Oxidativo , Mielofibrose Primária/metabolismo , Transdução de Sinais , Superóxido Dismutase/metabolismo , Fator de Crescimento Transformador beta1/metabolismo , Antígenos CD34/análise , Proliferação de Células , Células Cultivadas , Regulação da Expressão Gênica , Humanos , MicroRNAs/genética , Mielofibrose Primária/genética , Mielofibrose Primária/patologia , Superóxido Dismutase/genética , Transcriptoma
20.
Epilepsy Behav ; 79: 146-153, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29289902

RESUMO

INTRODUCTION: We studied children and adolescents with epilepsy (CAWE) and their families to evaluate symptoms of anxiety and depression, quality of life (QoL), and their correlations with epilepsy characteristics. MATERIAL AND METHODS: The study included 326 (52.5% females) 8 to 18years old CAWE. Anxiety and depression were assessed with the "Self-administered psychiatric scales for children and adolescents" (SAFA), and family's QoL with the parents' report "Impact of Epilepsy on QoL" (IEQoL). RESULTS: The CAWE exhibiting abnormal (T≥70) scores were 8.0% in the anxiety scale, 9.2% in the depression scale, and 4.6% in both scales. Social anxiety was the predominant anxiety symptom, while irritable mood and desperation were the most frequent symptoms of depression. Depressive symptoms were associated with parents' complaint of higher worries about the child's condition and future and lower well-being of the family. Severity and duration of the epilepsy and polypharmacy were independent from abnormal scores of anxiety and depression, but were associated with parents' worries about the child's condition and family's well-being. CONCLUSIONS: Anxiety and depression in CAWE are independent from the characteristics of the disease but are correlated to the lower well-being of the family. A search of these emotional problems is recommended for better care of the patients and their families.


Assuntos
Ansiedade/psicologia , Depressão/psicologia , Epilepsia/diagnóstico , Pais/psicologia , Qualidade de Vida/psicologia , Adolescente , Ansiedade/epidemiologia , Criança , Depressão/epidemiologia , Epilepsia/psicologia , Família , Feminino , Humanos , Itália/epidemiologia , Masculino , Prevalência , Escalas de Graduação Psiquiátrica
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