Publications by authors named "Samya Z Nasr"

Background: Cystic fibrosis (CF) is a genetic disorder that remains underrecognized across Africa, where limited diagnostic capacity, low awareness, and competing health priorities contribute to delayed or missed diagnoses [1-4]. Although increasing data suggests CF is more prevalent than previously believed in Africa, survival remains poor [1]. These challenges do not only affect people with CF (pwCF) in Africa but also have implications for global understanding of the disease, particularly among populations historically excluded from CF research and treatment advances.

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Objective: Although studies have examined changes in C-reactive protein (CRP) during pulmonary exacerbations (PEX) in people with cystic fibrosis (PwCF), few have evaluated CRP profiles across age groups. Here, we characterize age-related CRP responses to PEX treatment.

Methods: We measured CRP concentrations at the beginning and end of intravenous (IV) antibiotic therapy for PEX in 100 pediatric and 147 adult PwCF at 10 US CF Centers.

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Background: Enhancing family readiness for the healthcare transition (HCT) to adult-focused care can help adolescents and young adults (AYA) thrive in adulthood. We aimed to explore modifiable and non-modifiable individual, family, and healthcare factors associated with HCT readiness of AYA among families of AYA with cystic fibrosis (CF) during COVID-19.

Methods: A multi-site, cross-sectional design was used and an online survey was deployed among families and their AYA from three US pediatric CF centers.

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Background: Lung inflammation is associated with tissue damage in cystic fibrosis (CF). LAU-7b, a novel oral drug candidate, was shown to control inflammation and stabilize CFTR protein in the epithelial membrane during inflammatory stress in preclinical models of CF.

Methods: A double-blind, randomized, placebo-controlled Phase 2 study was conducted to evaluate efficacy and safety of LAU-7b in adults with CF.

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Rationale: Lung T1 MRI is a potential method to assess cystic fibrosis (CF) lung disease that is safe, quick, and widely available, but there are no data in children with mild CF lung disease.

Objective: Assess the ability of lung T1 MRI to detect abnormalities in children with mild CF lung disease.

Methods: We performed T1 MRI, multiple breath washout (MBW), chest computed tomography (CT), and spirometry in a cohort of 45 children with mild CF lung disease (6-11 years of age).

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Article Synopsis
  • - Cystic fibrosis (CF) can lead to a condition called CF-related liver disease (CFLD), which appears to be more prevalent in Egyptian children compared to non-Egyptians with CF.
  • - A study involving 50 children with CF in Cairo identified that about one-third had CFLD, with risk factors including male sex, severe genetic mutations, and pancreatic insufficiency.
  • - The findings indicate that CFLD is a significant concern in Egyptian CF patients, with risk factors aligning with other regional studies, suggesting a common trend in the disease's impact.
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Background: A collaboration between the University of Michigan (U of M) Cystic Fibrosis Center (CFC) and Marmara University (MU) CFC was initiated to improve the health status of people with cystic fibrosis (pwCF) at MU through implementing Quality Improvement (QI) initiatives. The main aim was to improve lung function in children with FEV1pp <80. The secondary aim was to assess the changes in health related quality of life.

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Background: Peripherally inserted central catheters (PICCs) are used commonly to administer antibiotics to people with cystic fibrosis (CF), but their use can be complicated by venous thrombosis and catheter occlusion.

Research Question: Which participant-, catheter-, and catheter management-level attributes are associated with increased risk of complications of PICCs among people with CF?

Study Design And Methods: This was a prospective observational study of adults and children with CF who received PICCs at 10 CF care centers in the United States. The primary end point was defined as occlusion of the catheter resulting in unplanned removal, symptomatic venous thrombosis in the extremity containing the catheter, or both.

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Background: A collaboration between the University of Michigan (UM) Cystic Fibrosis Center (CFC) and Marmara University (MU) CFC was initiated in MU through conducting Quality Improvement projects (QIP). The global aim was to improve nutritional status of children with CF (cwCF), with a specific aim to increase the mean BMI percentile (BMIp) for cwCF by 10 percentile points in 12 months.

Methods: Body mass index (BMI) percentiles of cwCF were categorized as: nutritionally adequate (BMIp ≥ 50%); at risk (BMIp 25%-49%); urgently at risk (BMIp 10%-25%); critically at risk (BMIp < 10%).

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Testing immunoreactive trypsinogen (IRT) is the first step in cystic fibrosis (CF) newborn screening. While high IRT is associated with CF, some cases are missed. This survey aimed to find factors associated with missed CF cases due to IRT levels below program cutoffs.

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The cannabis plant is the most used federally illegal drug in the United States and is widely used by adolescents. Cannabis has complex effects on the body and mind. All health professionals who take care of adolescents with cystic fibrosis (CF) should be aware of the factors impacting cannabis use in CF.

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The development of formal transition models emerged to reduce variability in care, including cystic fibrosis (CF) responsibility, independence, self-care, and education (RISE), which provides a standardized transition program, including knowledge assessments, self-management checklists, and milestones for people with CF. Despite these interventions, the current landscape of health care transition (HCT) remains suboptimal, and additional focused attention on HCT is necessary. Standardization of assessment tools to gauge the efficacy of transfer from pediatric to adult care is a high priority.

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To address the discrepancy in the quality of care and outcomes between cystic fibrosis centers (CFCs) in high-income countries and limited resources countries (LRCs), a collaboration between our team at the University of Michigan CFC (UMCFC) and a CF center in Turkey (Marmara University CFC [MUCFC], Istanbul) was established. The collaboration included evaluation of all aspects of care and initiation of quality improvement (QI) measures. Teaching and implementing QI tools has led to start of improvement in MUCFC care.

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People with cystic fibrosis (PCF) have unique physical and emotional needs, which are best met through interdisciplinary care (IDC). In the midst of the pandemic, our center aimed to begin a telehealth care model with an objective to increase successful care visits from baseline of 0-95% by June 26, 2020, including meeting cystic fibrosis (CF) care standards of IDC visits that are coproduced through agenda setting with PCF. Shifting IDC for pediatric CF patients to telehealth was part of a quality improvement initiative.

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Children with cystic fibrosis (CF) (cwCF) suffer from inadequate weight gain, failure to thrive, and muscle weakness. The latter may be secondary to disuse atrophy (muscle wasting or reduction in muscle size associated with reduced physical activity and inflammation). Handgrip strength (HGS) is a reliable surrogate for muscle strength and lean body mass.

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In Michigan (MI), NBS for CF was started in October 2007 using the IRT/DNA protocol. In 2016, a component of the Hologic molecular test kit used by the MI NBS lab was recalled (40 CF mutation 2nd tier test). This recall had a major impact on states using the Hologic test kits in their NBS programs.

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Introduction: Despite emerging data that suggest a high frequency and severity of obstructive sleep apnea (OSA) among patients with cystic fibrosis (CF), few of them are referred for polysomnography. Little is known about which patients with CF are at increased risk for OSA and which sleep symptoms merit investigation.

Methods: A single-center retrospective analysis of clinical and polysomnographic data from 2009, January 1 to October 31, 2020 in referred children and adults with CF.

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Background: Nebulizers can be contaminated with microorganisms and may be a source of infection in the lower airways in patients with cystic fibrosis (CF).

Objective: Primary aim of this study was to determine the level of knowledge regarding nebulizer hygiene and adherence to CF foundation infection prevention and control (IPC) measures of CF patients in our center. We also evaluated the effect of a standardized training program on nebulizer cleaning and disinfection practises with pre and posttest.

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Background: Depression and anxiety symptoms in patients with cystic fibrosis (CF) and their caregivers are 2-3 times higher than in the normal population. This study aims to evaluate the frequency and severity of depression and anxiety symptoms and to determine possible risk factors in CF patients and their mother and/or fathers at Marmara University CF center.

Methods: The study included 132 CF patients who were followed up at our CF center.

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Background: Malnutrition is associated with Cystic Fibrosis (CF) disease progression. That contributes to decreased lung function, poor quality of life, and increased morbidity and mortality. Appetite stimulants (AS) have been used to help increase caloric intake.

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Compared with body mass index (BMI), lean body mass and fat-free mass are strongly associated with lung function in children and adolescents with cystic fibrosis (CF). Methods of measuring body composition in youth with CF are often unreliable, expensive, or not clinically feasible. Grip strength (GS), a measure of muscle function, is used as a surrogate for muscle mass and is an indicator of nutrition status.

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Introduction: Cystic fibrosis (CF) is a life-shortening, genetic disease that affects approximately 30,000 Americans. Although patients frequently report snoring, mouth breathing, and insomnia, the extent to which sleep-disordered breathing (SDB) may underlie these complaints remains unknown.

Methods: Single-center retrospective review of polysomnography results from referred patients with and without CF individually-matched (1:2) for age, gender, race, and body mass index (BMI).

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