Publications by authors named "Laura Fontana"

Background: Congenital anomalies of the knee are a spectrum of rare disorders with wide clinical and genetic variability, which are mainly due to the complex processes underlying knee development. Despite progresses in understanding pathomechanisms and associated genes, many patients remain undiagnosed.

Objective: To uncover the genetic bases of a congenital patellar dislocation affecting multiple family members with variable severity.

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Moebius syndrome (MBS) is a rare congenital disorder characterized by non-progressive facial palsy and ocular abduction paralysis. Most cases are sporadic, but also rare familial cases with autosomal dominant transmission and incomplete penetrance/variable expressivity have been described. The genetic etiology of MBS is still unclear: de novo pathogenic variants in and are reported in only a minority of cases, suggesting the involvement of additional causative genes.

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Introduction: Glioblastoma -wildtype (GBM) is the most malignant brain tumor in adults, with a poor prognosis of approximately 15 months after diagnosis. Most patients suffer from a recurrence in <1 year, and this renders GBM a life-threatening challenge. Among molecular mechanisms driving GBM aggressiveness, angiogenesis mediated by GBM endothelial cells (GECs) deserves consideration as a therapeutic turning point.

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Pharmacogenetics investigates sequence of genes that affect drug response, enabling personalized medication. This approach reduces drug-induced adverse reactions and improves clinical effectiveness, making it a crucial consideration for personalized medical care. Numerous guidelines, drawn by global consortia and scientific organizations, codify genotype-driven administration for over 120 active substances.

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Recent advancements in reproductive medicine have guided novel strategies for addressing male infertility, particularly in cases of non-obstructive azoospermia (NOA). Two prominent invasive interventions, namely testicular sperm extraction (TESE) and microdissection TESE (micro-TESE), have emerged as key techniques to retrieve gametes for assisted reproduction technologies (ART). Both heterogeneity and complexity of NOA pose a multifaceted challenge to clinicians, as the invasiveness of these procedures and their unpredictable success underscore the need for more precise guidance.

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Beckwith-Wiedemann Syndrome (BWS) is an imprinting disorder characterized by overgrowth, stemming from various genetic and epigenetic changes. This study delves into the role of upregulation in BWS, focusing on insulin-like growth factor pathways, which are poorly known in this syndrome. We examined the IGF2R, the primary receptor of IGF2, WNT, and autophagy/lysosomal pathways in BWS patient-derived lymphoblastoid cell lines, showing different genetic and epigenetic defects.

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Influenza viruses infect 5-30% of the world's population annually, resulting in millions of incidents of hospitalization and thousands of mortalities worldwide every year. Although annual vaccination has significantly reduced hospitalization rates in vulnerable populations, the current vaccines are estimated to offer a wide range of protection from 10 to 60% annually. Such incomplete immunity may be related to both poor antigenic coverage of circulating strains, as well as to the insufficient induction of protective immunity.

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We describe the case of a young woman affected by debilitating chorea and rapidly progressive cognitive decline. While her original diagnosis was multiple sclerosis, we performed a full instrumental and genetic assessement, though which we identified multiple genetic variants, including a novel variant of the APP gene. We propose some possible mechanisms by which such variants may contribute to neuroinflammation and ultimately lead to this devastating clinical course.

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Idiopathic pulmonary fibrosis (IPF) is a rare disease of the lung with a largely unknown etiology and a poor prognosis. Intriguingly, forms of familial pulmonary fibrosis (FPF) have long been known and linked to specific genetic mutations. There is little evidence of the possible role of genetics in the etiology of sporadic IPF.

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Article Synopsis
  • Whole-Exome Sequencing (WES) is a useful method for diagnosing genetic conditions, but interpreting variants is difficult in complex diseases due to overlapping clinical features.
  • The study investigated ten patients from eight families who had unclear diagnoses and multiple clinical signs, and each underwent trio-WES testing.
  • Despite identifying ten candidate variants, making definitive diagnoses remains tough due to the complexity and rarity of the conditions, yet these findings may help create new genotype-phenotype correlations for better understanding.
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Healthcare workers experienced high degree of stress during COVID-19. Purpose of the present article is to compare mental health (depressive and Post-Traumatic-Stress-Disorders-PTSD-symptoms) and epigenetics aspects (degree of methylation of stress-related genes) in front-line healthcare professionals versus healthcare working in non-COVID-19 wards. Sixty-eight healthcare workers were included in the study: 39 were working in COVID-19 wards (cases) and 29 in non-COVID wards (controls).

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Background: Malaria remains a key cause of mortality in low-income countries. RTS,S/AS01 is currently the most advanced malaria vaccine, demonstrating ∼50% efficacy in controlled human malaria infection (CHMI) studies in malaria-naive adults and ∼30%-40% efficacy in field trials in African infants and children. However, a higher vaccine efficacy is desirable.

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Myasthenia gravis (MG) is a neuromuscular autoimmune disease characterized by prevalence in young women (3:1). Several mechanisms proposed as explanations for gender bias, including skewed X chromosome inactivation (XCI) and dosage or sex hormones, are often involved in the development of autoimmunity. The skewed XCI pattern can lead to an unbalanced expression of some X-linked genes, as observed in several autoimmune disorders characterized by female predominance.

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The central nervous system (CNS) has emerged as a critical HIV reservoir. Thus, interventions aimed at controlling and eliminating HIV must include CNS-targeted strategies. Given the inaccessibility of the brain, efforts have focused on cerebrospinal fluid (CSF), aimed at defining biomarkers of HIV-disease in the CNS, including HIV-specific antibodies.

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Article Synopsis
  • Skeletal disorders, such as brachydactyly type E, are caused by genetic defects that disrupt the pathways involved in bone development and growth-plate formation, leading to overlapping symptoms and making diagnosis challenging without genetic testing.
  • In a study of five patients with undiagnosed skeletal malformations similar to Albright's hereditary osteodystrophy, whole-exome sequencing identified novel variants in the PTHLH and TRPS1 genes, which were confirmed to be potentially pathogenic.
  • The research highlights the complexity of diagnosing skeletal syndromes due to their similar features, emphasizing the need for interdisciplinary approaches to improve patient care in these rare genetic cases.
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Traditionally, Cornelia de Lange Syndrome (CdLS) is considered a cohesinopathy caused by constitutive mutations in cohesin complex genes. Cohesin is a major regulator of chromatin architecture, including the formation of chromatin loops at the imprinted / domain. We used 3C analysis on lymphoblastoid cells from CdLS patients carrying mutations in and genes to explore 3D chromatin structure of the /  and evaluate the influence of cohesin alterations in chromatin architecture.

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Background: Maternal dietary habits are contributors of maternal and fetal health; however, available data are heterogeneous and not conclusive.

Methods: Nutrient intake during pregnancy was assessed in 503 women with uncomplicated pregnancies, using the validated Food Frequency Questionnaire developed by the European Prospective Investigation into Cancer and Nutrition (EPIC-FFQ).

Results: In all, 68% of women had a normal body mass index at the beginning of pregnancy, and 83% of newborns had an appropriate weight for gestational age.

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Article Synopsis
  • - Beckwith-Wiedemann syndrome (BWS) is a complex overgrowth disorder linked to genetic changes on chromosome 11p15, affecting gene expression through imprinting and methylation patterns.
  • - Some BWS patients experience multi-locus imprinting disturbances (MLID) that complicate diagnosis, as no clear phenotypic links have been identified for these patients, raising questions about the effectiveness of multi-locus testing.
  • - The review discusses the clinical and molecular diagnosis of BWS, particularly in prenatal and postnatal cases, while exploring insights into how imprinting during early development may differ in cases like monozygotic twins and those conceived via assisted reproductive technology.
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Background: De novo pathogenic variants in the DDX3X gene are reported to account for 1-3% of unexplained intellectual disability (ID) in females, leading to the rare disease known as DDX3X syndrome (MRXSSB, OMIM #300958). Besides ID, these patients manifest a variable clinical presentation, which includes neurological and behavioral defects, and abnormal brain MRIs.

Case Presentation: We report a 10-year-old girl affected by delayed psychomotor development, delayed myelination, and polymicrogyria (PMG).

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The placental methylation pattern is crucial for the regulation of genes involved in trophoblast invasion and placental development, both key events for fetal growth. We investigated LINE-1 methylation and methylome profiling using a methylation EPIC array and the targeted methylation sequencing of 154 normal, full-term pregnancies, stratified by birth weight percentiles. LINE-1 methylation showed evidence of a more pronounced hypomethylation in small neonates compared with normal and large for gestational age.

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An important event in the unfolded protein response (UPR) is activation of the endoplasmic reticulum (ER) kinase PERK. The PERK signalling branch initially mediates a prosurvival response, which progresses to a proapoptotic response upon prolonged ER stress. However, the molecular mechanisms of PERK-mediated cell death are not well understood.

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The severity of coronavirus disease 2019 (COVID-19) is a crucial problem in patient treatment and outcome. The aim of this study is to evaluate circulating level of sphingosine-1-phosphate (S1P) along with severity markers, in COVID-19 patients. One hundred eleven COVID-19 patients and forty-seven healthy subjects were included.

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