Publications by authors named "Livnat G"

Background: Quality of life and survival in Cystic Fibrosis (CF) have improved dramatically, making family planning a feasible option. Maternal and perinatal outcomes in women with CF (wwCF) are similar to those seen in the general population. However, the effect of undergoing multiple pregnancies is unknown.

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  • Cystic fibrosis (CF) is a chronic disease that requires complex daily treatments, leading to low adherence among patients, which affects their health and costs.
  • The study evaluates the ReX platform, a patient engagement tool that helps manage CF treatments, providing reminders and adherence data, aimed at improving adherence to high-cost CF medications known as CFTR modulators.
  • Results showed high adherence rates (97.5% in the first year) and improved lung function among patients using ReX, with positive feedback on the platform's usability and no reported adverse effects.
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Background: Population genetic carrier screening (PGCS) for cystic fibrosis (CF) has been offered to couples in Israel since 1999 and was included in a fully subsidized national program in 2008. We evaluated the impact of PGCS on CF incidence, genetic and clinical features.

Methods: This was a retrospective national study.

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Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes an acute respiratory illness. A substantial proportion of adults experience persistent symptoms. There is a paucity of data on respiratory sequelae in children.

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Background: Elexacaftor/tezacaftor/ivacaftor (ELX/TEZ/IVA) significantly improves health outcomes in people with cystic fibrosis (pwCF) carrying one or two F508del mutations. According to in vitro assays performed in FRT cells, 178 additional mutations respond to ELX/TEZ/IVA. The N1303K mutation is not included in this list of mutations.

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Background: The prevalence of nontuberculous mycobacteria (NTM) infections is rising in people with cystic fibrosis (pwCF). NTM infection, especially infection with Mycobacterium abscessus complex (MABC), is commonly associated with severe lung deterioration. The current treatment modalities, including multiple intravenous antibiotics, frequently fail to achieve airway eradication.

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Cystic Fibrosis (CF) is caused by mutations in the CF transmembrane conductance regulator (CFTR), a chloride/bicarbonate channel. Many studies utilize human airway cell models (cell lines and primary cells) to study different aspects of CFTR biology. Media selection can alter the growth and differentiation of primary cells, yet the impact on stable airway cell lines is unclear.

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  • Two cases of Kawasaki disease (KD) were reported where patients showed ongoing lung issues and co-infection.
  • The symptoms resolved after treatment with intravenous immunoglobulin.
  • Pediatricians should be aware that KD can mimic pneumonia symptoms, especially when antibiotics don't help and there's a long fever and inflammation.
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  • The study assessed the effectiveness of the drug combination Elexacaftor/Tezacaftor/Ivacaftor (ETI) in patients with cystic fibrosis (CF) who have mutations other than F508del.
  • Results showed significant improvements in sweat chloride levels, reduced pulmonary exacerbations, and fewer days on antibiotics for patients who hadn't previously used CFTR modulators.
  • The findings suggest that ETI is clinically effective for CF patients with non-F508del mutations, supporting its routine use for these individuals.
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  • Lumacaftor/Ivacaftor (LUM-IVA) is a treatment for cystic fibrosis that shows promise in improving lung function and reducing pulmonary exacerbations in patients with the F508del mutation, but its effects on other body systems are still unclear.
  • A year-long study on adult cystic fibrosis patients demonstrated no significant changes in glucose or weight but noted a decrease in alkaline-phosphatase levels and slight positive trends in calcium levels and bone mineral density.
  • Overall, the treatment resulted in improved lung function and a reduction in the need for IV antibiotics, suggesting benefits for both pulmonary and bone health, but more research is needed on its broader impacts.
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Background: Airway clearance is a fundamental component of bronchiectasis care. Lung clearance index (LCI) is a measurement of ventilation inhomogeneity. Its responsiveness to long-term airway clearance is unknown.

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Background: Characteristics of obstructive sleep apnea (OSA) changes with age. Infants, toddlers and prepubertal children with OSA are usually underweight and may suffer from failure to thrive (FTT). Adenotonsillectomy (T&A) is the first line of treatment for OSA in childhood.

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Background: With increasing longevity and quality of life in adults with Cystic fibrosis (CF), growing maternity rates are reported. Women with severe CF are becoming pregnant, with unpredictable maternal and fetal outcomes.

Aim: To determine how baseline disease severity, pancreatic insufficiency (PI) and Pseudomonas aeruginosa (PA) infection affect fertility, the pregnancy course, delivery, neonatal outcome, and subsequent disease progression.

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Background: Bronchiectasis is associated with morbidity, low exercise capacity and poor quality of life. There is a paucity of data on exercise capacity using cardiopulmonary exercise test (CPET) in non-cystic fibrosis (CF) bronchiectasis. Our aim was to compare exercise capacity using CPET in CF and non-CF bronchiectasis patients.

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Objectives: In all patients with cystic fibrosis (CF), gastrointestinal (GI) tract CF transmembrane conductance regulator dysfunction occurs early in life. The identical pathophysiological triad of obstruction, infection, and inflammation causes disease of the airways and in the intestinal tract (CF enteropathy). Mucus accumulation within GI tract is a niche for abnormal microbial colonization, leading to dysbiosis.

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Objective: The causes of subfertility in women with CF though multifactorial are not well described. Our aim in this study was to determine the prevalence and factors associated with female subfertility among women with CF.

Methods: A retrospective multinational study from 11 CF centers in 5 countries (Israel, France, Spain, Italy, UK) including women with CF was undertaken.

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Background: The Q359K/T360K mutation, described in Jewish CF patients of Georgian decent, is of questionable clinical significance.

Methods: Clinical records of patients with the Q359K/T360K mutation from three CF centers were studied for phenotypic expression and putative mechanism of dysfunction. Computer models of mutant CFTR were constructed.

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Background: Airway infections in Primary Ciliary Dyskinesia (PCD) are caused by different microorganisms, including pseudomonas aeruginosa (PA). The aim of this study was to investigate the association of PA colonization and the progression of lung disease in PCD.

Methods: Data from 11PCD centers were retrospectively collected from 2008 to 2013.

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Background: Ivacaftor is a drug that increases the probability of the cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel remaining open. Information about the efficacy of ivacaftor in patients carrying the rare p.Ser549Arg (S549R) CFTR mutation is sparse.

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Article Synopsis
  • The study investigated the efficacy of expanding preconception carrier screening for cystic fibrosis (CF) in Israel, where there is a wide variety of CFTR mutations due to genetic diversity.
  • Researchers genotyped a group of CF patients lacking a molecular diagnosis, identifying 54 mutations, of which only 16 were part of the existing screening panel.
  • The findings suggest that incorporating a broader range of CFTR mutations could significantly increase detection rates for potential carriers before conception.
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Primary ciliary dyskinesia (PCD) is under diagnosed and underestimated. Most clinical research has used some form of questionnaires to capture data but none has been critically evaluated particularly with respect to its end-user feasibility and utility. To critically appraise a clinical data collection questionnaire for PCD used in a large national PCD consortium in order to apply conclusions in future PCD research.

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Ivacaftor, a CFTR potentiator, has been found to improve CFTR function and clinical outcomes in patients with cystic fibrosis (CF) gating mutations. We investigated the effects of ivacaftor on CFTR functional measurement in CF patients carrying gating mutations other than p.Gly551Asp.

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