Publications by authors named "Medrano C"

Article Synopsis
  • Understanding the role of transcription factor binding sites in gene regulation is a critical and complex issue in biology, particularly for multicellular organisms.
  • Massively parallel reporter assays (MPRAs) enable high-throughput measurement of gene expression from numerous regulatory sequences in cell cultures but face limitations in whole organisms due to the need for DNA library integration.
  • Researchers developed a system using base editing technology to introduce targeted mutations in the genomes of cell cultures and whole organisms, significantly improving the ability to study enhancer functions by using multiple guide RNAs for efficient mutagenesis.
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Biallelic variants in PPA2 gene cause a rare but lethal mitochondrial disorder. We describe the first four cases reported in Spain of PPA2 disease in two unrelated families. We have conducted a revision of the clinical history, necropsies, and postmortem genetic testing from probands, and clinical evaluation, genetic testing and blood transcript analysis in family members.

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Introduction And Objectives: There is limited evidence regarding the use of subcutaneous implantable cardioverter-defibrillators (S-ICD) in pediatric patients. The aim of this study was to determine the incidence of complications in these patients at our center, according to the type of ICD and patient size.

Methods: We included all patients aged<18 years who received an S-ICD since 2016 at our center.

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Rationale: Several authors have compared COVID-19 infection with influenza in the ICU.

Objective: This study aimed to compare the baseline clinical profiles, care procedures, and mortality outcomes of patients admitted to the intensive care unit, categorized by infection status (Influenza vs. COVID-19).

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Molecular study has become an invaluable tool in the field of RASopathies. Treatment with recombinant human growth hormone is approved in Noonan syndrome but not in the other RASopathies. The aim of this study was to learn about the molecular base of a large cohort of patients with RASopathies, with particular emphasis on patients with pathogenic variants in genes other than , and its potential impact on rGH treatment indication.

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Context: COVID-19 has ravaged nations around the world, with New York City (NYC) and the NYC suburbs being particular epicenters of COVID-19 infection. Suffolk County, NY, has reported over 200,000 cases and 3,000 deaths to date. Most initial COVID-19 research concerned hospitalized patients.

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Gametogenesis requires packaging of the cellular components needed for the next generation. In budding yeast, this process includes degradation of many mitotically stable proteins, followed by their resynthesis. Here, we show that one such case-Superoxide dismutase 1 (Sod1), a protein that commonly aggregates in human ALS patients-is regulated by an integrated set of events, beginning with the formation of pre-meiotic Sod1 aggregates.

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Although melanoma starts as a local disease, it can metastasize to other sites of the body including the lung, brain, liver, and intestines. However, pleural involvement is a rare presentation. Here, we present a case of a 57-year-old man with a history of stage IIA cutaneous melanoma, that relapsed 3 years after cutaneous resection, presenting with a non-resolving pleural effusion.

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Two divergent genetic lineages have been described for the endangered green turtle in the Pacific Ocean, occurring sympatrically in some foraging grounds. Chile has seven known green turtle foraging grounds, hosting mainly juveniles of different lineages. Unfortunately, anthropic factors have led to the decline or disappearance of most foraging aggregations.

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Article Synopsis
  • Up to 50% of childhood cases of hypertrophic cardiomyopathy (HCM) occur before age 12, but this demographic hasn't been thoroughly studied.
  • The research aimed to analyze the clinical characteristics and progression of children diagnosed with nonsyndromic HCM under 12 years old, utilizing data from the International Paediatric Hypertrophic Cardiomyopathy Consortium involving 639 children.
  • Results showed that younger patients had similar symptoms and cardiac issues compared to older children; however, they experienced serious events like mortality at younger ages, with a notable difference in surgical and device interventions between the two age groups.
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Background: Maximal left ventricular wall thickness (MLVWT) is a risk factor for sudden cardiac death (SCD) in hypertrophic cardiomyopathy (HCM). In adults, the severity of left ventricular hypertrophy has a nonlinear relationship with SCD, but it is not known whether the same complex relationship is seen in childhood. The aim of this study was to describe the relationship between left ventricular hypertrophy and SCD risk in a large international pediatric HCM cohort.

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Introduction: Surgical treatment during Covid-19 pandemic is controversial. Currently, most clinical guidelines advise to defer surgical patients during the Covid-19 pandemic, although the supporting data is sparse. We assumed that a Covid-19-free hospital, on the back of strong isolation measures and targeted screening, could reduce complications and enable us to continue treating high-risk patients.

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The immunogenicity of the severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) vaccine was improved by the administration of a third dose. The aim of our retrospective study was to assess the evolution of binding and neutralizing antibody concentration until 3 months after the third dose in a large cohort of solid organ transplant (SOT) patients (n = 872). At 1 month after the third dose, anti-SARS-CoV-2 antibodies were detected by means of enzyme-linked immunosorbent assay tests in 578 patients (66.

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Background: There is an unmet need to develop safe and successful heparin-free regional anticoagulation modalities in haemodialysed patients at risk of bleeding. Whether the addition of citrate as a prefilter injection or in the dialysate itself is required to reach anticoagulation objectives when calcium-free dialysate is used as regional anticoagulation remains unclear.

Methods: In this monocentric retrospective study, we report our experience of 908 dialysis sessions performed with a calcium-free citrate-containing dialysate and calcium reinjection according to the ionic dialysance, without additional heparin.

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Article Synopsis
  • Intradialytic hypotension can worsen long-term kidney issues in critically ill patients, but acetate-free biofiltration (AFB) may provide better outcomes than traditional bicarbonate-based hemodialysis (B-IHD).
  • In a study of 49 mechanically ventilated patients, AFB resulted in significantly fewer episodes of hypotension compared to B-IHD, even when adjusting for medication effects.
  • The research suggests that AFB may improve hemodynamic stability during dialysis and has potential for enhanced carbon dioxide removal, indicating a need for more investigation in this area.
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Neural circuits at the brainstem involved in the central generation of the motor patterns of respiration and cardiorespiratory chemoreflexes organize as cell assemblies connected by chemical and electrical synapses. However, the role played by the electrical connectivity mainly mediated by connexin36 (Cx36), which expression reaches peak value during the postnatal period, is still unknown. To address this issue, we analyzed here the respiratory phenotype of a mouse strain devoid constitutively of Cx36 at P14.

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Background: Donation after Circulatory death is gaining worldwide acceptance. Most protocols regard their first cases to be performed with donor and recipient in the same institution. Few records of children or distant procurement have been published.

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Objective: One of the challenges in hypertrophic cardiomyopathy (HCM) is to determine the pathogenicity of genetic variants and to establish genotype/phenotype correlations. This study aimed to: (1) demonstrate that c.2149-1G>A is a founder pathogenic variant, (2) describe the phenotype and clinical characteristics of mutation carriers and (3) compare these patients with those with the most frequent pathogenic HCM variants: p.

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Introduction: Surgical treatment during COVID-19 pandemic is controversial. Currently, most clinical guidelines advise to defer surgical patients during the COVID-19 pandemic, although the supporting data is sparse. We assumed that a COVID-19-free hospital, on the back of strong isolation measures and targeted screening, could reduce complications and enable us to continue treating high-risk patients.

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Collaboration between cardiac surgeons and cardiologists can offer interventions that each specialist may not be able to offer on their own. This type of collaboration has been demonstrated with the hybrid Stage I in patients with hypoplastic heart syndrome. Since that time, a hybrid approach to cardiac interventions has been expanded to an incredible variety of potential indications.

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Introduction And Objectives: Quantification of cardiovascular risk has been based on scores such as Framingham, Framingham-REGICOR, SCORE or Life's Simple 7 (LS7). In vitro, animal, and randomized clinical studies have shown that polyphenols may provide benefits to the vascular system and reduce the inflammatory response. However, some clinical-epidemiological studies have yielded inconsistent results.

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Introduction: Surgical treatment during COVID-19 pandemic is controversial. Currently, most clinical guidelines advise to defer surgical patients during the COVID-19 pandemic, although the supporting data is sparse. We assumed that a COVID-19-free hospital, on the back of strong isolation measures and targeted screening, could reduce complications and enable us to continue treating high-risk patients.

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Aims: The 12-lead electrocardiogram (ECG) is routinely performed in children with hypertrophic cardiomyopathy (HCM). An ECG risk score has been suggested as a useful tool for risk stratification, but this has not been independently validated. This aim of this study was to describe the ECG phenotype of childhood HCM in a large, international, multi-centre cohort and investigate its role in risk prediction for arrhythmic events.

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Background: One of the most commonly discussed benefits of macromastia treatment surgery, bilateral reduction mammaplasty, is the potential for subsequent weight loss. There is limited research examining weight change after reduction mammaplasty and a definitive relationship remains to be established. Our study aims to investigate this relationship and to identify potential preoperative and operative factors associated with postoperative changes in weight.

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