Publications by authors named "Michel Polak"

Context: Congenital hypothyroidism (CH) is the most common neonatal endocrine disorder and is chiefly caused by thyroid dysgenesis (CHTD). The inheritance mode of the disease remains complex.

Objectives: Gain insight into the inheritance mode of CHTD.

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Background: Transition from paediatric to adult healthcare is a turning point for patients with Type 1 diabetes (T1D). A gradual coordinated process connecting paediatric and adult healthcare providers may improve adherence to adult follow-up.

Aims: To describe a transition process developed jointly by paediatric and adult diabetology units and compare patients progressing or not to follow-up in adult care setting.

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Objective: Adreno CorticoTropic Hormone (ACTH)-independent Cushing's syndrome (CS) in children is very rare but potentially fatal. In bilateral nodular hyperplasia, synchronous bilateral adrenalectomy (SBA) represents the definitive treatment to correct hypercortisolism. We aim to report the multidisciplinary management of this rare condition.

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Context: Several long-acting growth hormone (LAGH) therapies have recently become available, but guidance on their usage in children with growth hormone (GH) deficiency is limited.

Methods: International experts in pediatric endocrinology were invited to join a consensus group based on their expertise in treating children with daily GH and LAGH. The group comprised 11 experts from 10 countries across the world.

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Article Synopsis
  • Next-generation sequencing (NGS) has helped uncover genetic causes of primary ovarian insufficiency (POI), while the reasons for diminished ovarian reserve (DOR) are less understood.
  • A 14-year-old patient with isolated DOR was found to have two frameshift mutations in the BRCA1 gene, but surprisingly showed no signs of Fanconi anemia (FA).
  • Despite the absence of FA symptoms, the patient's cells exhibited high chromosomal fragility, and studies indicated a shortened version of the BRCA1 protein was produced, suggesting that BRCA1 is crucial for ovarian health and functioning.
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Aim: Height velocity is considered a key auxological tool to monitor growth, but updated height velocity growth charts are lacking. We aimed to derive new French height velocity growth charts by using a big-data approach based on routine measurements.

Methods: We extracted all growth data of children aged 1 month-18 years from the electronic medical records of 42 primary care physicians, between 1 January 1990 and 8 February 2018, throughout the French metropolitan territory.

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Purpose: Defects in the gene encoding selenocysteine insertion sequence binding protein 2, SECISBP2, result in global impaired selenoprotein synthesis manifesting a complex syndrome with characteristic serum thyroid function tests due to impaired thyroid hormone metabolism. Knowledge about this multisystemic defect remains limited.

Methods: Genetic and laboratory investigations were performed in affected members from 6 families presenting with short stature and failure to thrive.

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Article Synopsis
  • Around 10,000 children in France with growth hormone deficiency are treated daily with recombinant human growth hormone, which effectively helps with growth but poses adherence challenges.
  • Daily injections can negatively impact the quality of life for patients and their families, prompting interest in long-acting growth hormones (LAGH) that require less frequent administration.
  • New LAGHs, like somatrogon MA, are now available in Europe, but there are ongoing questions about their effectiveness and safety, highlighting the need for further studies and practical guidelines for doctors.
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Background: Beta-cell monogenic forms of diabetes have strong support for precision medicine. We systematically analyzed evidence for precision treatments for GCK-related hyperglycemia, HNF1A-, HNF4A- and HNF1B-diabetes, and mitochondrial diabetes (MD) due to m.3243 A > G variant, 6q24-transient neonatal diabetes mellitus (TND) and SLC19A2-diabetes.

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Glyburide, a sulfonylurea drug used to treat type 2 diabetes, boasts neuroprotective effects by targeting the sulfonylurea receptor 1 (SUR1) and associated ion channels in various cell types, including those in the central nervous system and the retina. Previously, we demonstrated that glyburide therapy improved retinal function and structure in a rat model of diabetic retinopathy. In the present study, we explore the application of glyburide in non-neovascular ("dry") age-related macular degeneration (AMD), another progressive disease characterized by oxidative stress-induced damage and neuroinflammation that trigger cell death in the retina.

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Objective: Adamantinomatous craniopharyngioma mainly affects children. Excessive weight gain is a major long-term complication. The primary objective of this study was to assess long-term weight changes in children treated for craniopharyngioma.

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Introduction: To identify drivers of preference for growth hormone deficiency (GHD) treatment in French children, and their caregivers, and to quantify the relative importance of different aspects of treatment modalities using a discrete choice experiment (DCE).

Materials And Methods: Attributes characterizing GHD treatment modalities were identified through a literature review, qualitative interviews and focus groups with children, adolescents, and caregivers. A DCE questionnaire of 12 choice tasks was administered online to four groups of participants: autonomous adolescents (12 to 18 years), non-autonomous adolescent / caregiver dyads, caregivers of non-autonomous children (3 to 11 years) and autonomous children / caregiver dyads.

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Background: / mutations are associated with congenital hypothyroidism and thyroid dysgenesis. Borealin is involved in mitosis as part of the Chromosomal Passenger Complex. Although mutations decrease thyrocyte adhesion and migration, little is known about the specific role of Borealin in the thyroid.

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Article Synopsis
  • The study evaluates physicians' preferences and experiences with once-weekly somatrogon, a long-acting growth hormone, compared to the standard once-daily rhGH for treating pediatric growth hormone deficiency (pGHD).
  • Survey results showed that 75% of pediatric endocrinologists preferred somatrogon, citing its convenience and lower burden on patients and caregivers.
  • A majority found both treatment regimens equally effective for long-term growth outcomes, but significantly more were "very satisfied" with somatrogon.
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Background: While the risk for hypoglycemia during acute illness is well described in children with classical congenital adrenal hyperplasia (CAH), there is little evidence for the prevalence of asymptomatic hypoglycemia and the daily glucose patterns in CAH. Herein, we explored the daytime glucose profile of children with classical CAH.

Methods: We conducted an observational study in 11 children (6 female; age 3.

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Objective: Isolated childhood growth hormone deficiency (GHD) can persist into adulthood, and re-testing at the transition period is needed to determine whether continued growth hormone therapy is indicated. Here, our objective was to identify predictors of permanent GHD.

Design: Retrospective single-centre study of patients with childhood-onset GHD who were re-tested after adult height attainment.

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Background: Severe primary insulin-like growth factor-I (IGF-I) deficiency (SPIGFD) is a rare growth disorder characterized by short stature (standard deviation score [SDS] ≤ 3.0), low circulating concentrations of IGF-I (SDS ≤ 3.0), and normal or elevated concentrations of growth hormone (GH).

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Article Synopsis
  • Precision medicine is an evolving approach in healthcare that aims to enhance decision-making and health outcomes, particularly in managing diabetes, which poses serious health risks for millions globally.
  • The second international consensus report on precision diabetes medicine reviews current findings on prevention, diagnosis, treatment, and prognosis across different forms of diabetes, highlighting the potential for translating research into clinical practice.
  • The report also identifies knowledge gaps and sets out key milestones for better clinical implementation, emphasizing the need for standards addressing cost-effectiveness, health equity, and accessibility in treatment options.
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Context: The European Increlex® Growth Forum Database (Eu-IGFD) is an ongoing surveillance registry (NCT00903110) established to collect long-term safety and effectiveness data on the use of recombinant human insulin-like growth factor-1 (rhIGF-1, mecasermin, Increlex) for the treatment of children/adolescents with severe primary insulin-like growth factor-1 deficiency (SPIGFD).

Objective: This analysis of Eu-IGFD data aimed to identify the frequency and predictive factors for hypoglycemia adverse events (AEs) in children treated with rhIGF-1.

Methods: Data were collected from December 2008 to May 2021.

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Context: Somapacitan is a long-acting GH derivative for treatment of GH deficiency (GHD).

Objective: Evaluate the efficacy and tolerability of somapacitan in children with GHD after 2 years of treatment and after the switch from daily GH.

Design: A randomized, multinational, open-labelled, controlled parallel group phase 3 trial, comprising a 52-week main phase and 3-year safety extension (NCT03811535).

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Background: Beta-cell monogenic forms of diabetes are the area of diabetes care with the strongest support for precision medicine. We reviewed treatment of hyperglycemia in GCK-related hyperglycemia, HNF1A-HNF4A- and HNF1B-diabetes, Mitochondrial diabetes (MD) due to m.3243A>G variant, 6q24-transient neonatal diabetes (TND) and SLC19A2-diabetes.

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Context: Despite having normal growth hormone (GH) secretion, individuals with Turner syndrome (TS) have short stature. Treatment with recombinant human GH is recommended for TS girls with short stature.

Objective: This work aimed to evaluate the effectiveness and safety of Norditropin (somatropin, Novo Nordisk) with up to 10 years of follow-up in children with TS.

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Context: Growth hormone (GH) therapy can increase linear growth in patients with growth hormone deficiency (GHD), Turner syndrome (TS), Noonan syndrome (NS), and Prader-Willi syndrome (PWS), although outcomes vary by disease state.

Objective: To assess growth and identify factors associated with growth response with long-term GH therapy.

Methods: Data from pediatric patients with GHD, TS, NS, and PWS obtained at GH treatment initiation (baseline) and annually for 5 years in the ANSWER Program and NordiNet® IOS were analyzed retrospectively.

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Early treatment of neonatal diabetes with sulfonylureas has been proven to produce marked improvements of neurodevelopment, beside the demonstrated efficacy on glycemic control. Several barriers still prevent an early treatment in preterm babies including the limited availability of suitable galenic form of glibenclamide. We adopted oral glibenclamide suspension (Amglidia) for the early treatment of neonatal diabetes due to an homozygous variant of KCNJ11 gene c.

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