Publications by authors named "Marie Christine Vantyghem"

Aim: To describe the effects of Glucagon-like peptide-1 receptor agonists (GLP-1RA) in patients with familial partial lipodystrophy (FPLD) assessed in a real-life setting in a national reference network.

Patients And Methods: We retrospectively collected clinical and metabolic parameters in patients with FPLD in the French lipodystrophy reference network, who initiated GLP-1RA. Data were recorded before, at one-year (12 ± 6 months) and at the latest follow-up on GLP-1RA therapy (≥18 months).

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This consensus on primary hyperparathyroidism, drawn up under the aegises of the French Society of Endocrinology (SFE), French Association of Endocrine Surgery (AFCE) and French Society of Nuclear Medicine (SFMN), provides an update on positive, etiological and differential diagnosis and treatment in primary hyperparathyroidism. These recommendations take account of recent increase in the prevalence of primary hyperparathyroidism, due to 1. more systematic routine measurement of blood calcium and improved quality of parathyroid hormone assays, 2.

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The differential diagnosis of primary hyperparathyroidism can be considered clinically, biologically and radiologically. Clinically, primary hyperparathyroidism should be suspected in case of diffuse pain, renal lithiasis, osteoporosis, repeated fracture, cognitive or psychiatric disorder, or disturbance of consciousness. Nevertheless, the differential diagnosis of primary hyperparathyroidism is mainly biological, particularly in atypical forms, which must be differentiated from hypercalcemia with hypocalciuria or non- elevated PTH on the one hand, and from normo-calcemia with elevated PTH, hypophosphatemia or hypercalciuria on the other.

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Type 2 diabetes (T2D) is a common comorbidity in kidney transplant recipients, representing a significant proportion of the candidate pool. Post-kidney transplantation management of T2D remains challenging, leading to inferior long-term outcomes compared to non-diabetic recipients. This study aimed to assess the association between Homeostatic Model Assessment 2 (HOMA2) derived insulin resistance and beta-cell function on kidney graft outcomes in T2D kidney transplant recipients.

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Introduction: Lipodystrophy syndromes are rare diseases characterized by a generalized or partial lipoatrophic morphotype and metabolic complications. Data on health-related quality of life and impact of genetic lipodystrophy on social or psychological well-being are lacking.

Patients And Methods: Patients with genetic lipodystrophy were recruited throughout the French national reference network for rare diseases of insulin secretion and insulin sensitivity.

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Introduction: Glucocorticoid-induced diabetes (GCID) is a prevalent health issue, generally attributed to insulin resistance. High doses of dexamethasone (DEX) are known to inhibit glucose-stimulated insulin secretion (GSIS), but the effects of lower doses, commonly used in chronic therapy, and equipotent doses of other glucocorticoids (GCs) such as hydrocortisone (HC) and prednisone (PRED) remain underexplored. This study aimed to investigate these effects in vitro, and explore variations between patients.

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Background: Islet transplantation has been associated with better metabolic control and quality of life than insulin treatment alone, but direct evidence of its effect on hard clinical endpoints is scarce. We aimed to assess the effect of islet transplantation on patient-graft survival in kidney transplant recipients with type 1 diabetes.

Methods: In this retrospective cohort study, we enrolled all patients with type 1 diabetes who received a kidney graft in France during the study period, identified from the CRISTAL nationwide registry.

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Article Synopsis
  • * The French Endocrine Society and associated organizations created a reference document to address the complexities of managing these tumors, which can recur and lead to serious health issues, including impaired quality of life for patients, especially those with hypothalamic syndrome.
  • * Recent research has identified two tumor types—papillary and adamantinomatous—with different molecular signatures and treatment strategies, prompting ongoing developments in therapeutic options, including new medications for associated symptoms like hyperphagia.
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Background: Pathogenic variants in -encoding PLIN1 (perilipin-1) are responsible for an autosomal dominant form of familial partial lipodystrophy (FPL) associated with severe insulin resistance, hepatic steatosis, and important hypertriglyceridemia. This study aims to decipher the mechanisms of hypertriglyceridemia associated with -related FPL.

Methods: We performed an in vivo lipoprotein kinetic study in 6 affected patients compared with 13 healthy controls and 8 patients with type 2 diabetes.

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  • * These conditions can arise in people without obesity, may have genetic links, and usually differ from lipodystrophy syndromes, which involve areas of fat loss.
  • * The review discusses various forms of lipomatosis, including isolated conditions like Madelung disease and syndromic forms associated with genetic disorders, and highlights their potential impact on health and appearance.
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  • - Pheochromocytoma and paraganglioma (PPGL) are rare tumors with a significant genetic component, leading to the need for genetic screening for specific variants.
  • - Over 21 years (2001-2022), an endocrine oncogenetic lab studied 606 PPGL cases, using both traditional Sanger sequencing and modern next-generation sequencing (NGS) to identify genetic variants in patients and their relatives.
  • - The study found that 27.2% of index cases had pathogenic variants, with variability in symptoms and tumor characteristics among different families, emphasizing the importance of genetic screening for tailored patient management.
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  • APECED syndrome is a rare genetic disorder caused by mutations in the AIRE gene, typically characterized by a triad of symptoms including hypoparathyroidism, adrenal failure, and chronic mucocutaneous candidiasis (CMC), along with other non-endocrine issues.
  • In a national study involving 25 patients from 23 families, researchers identified 11 different variants of the AIRE gene, including two previously unreported variants, and found that a majority of patients displayed multiple clinical manifestations.
  • The study revealed significant immunological disturbances, such as NK cell lymphopenia and altered B lymphocyte homeostasis, and highlighted a variety of non-endocrine symptoms that could potentially be life-threatening, emphasizing the need for
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Pituitary deficiency, or hypopituitarism, is a rare chronic disease. It is defined by insufficient synthesis of one or more pituitary hormones (growth hormone, TSH, ACTH, LH-FSH, prolactin), whether or not associated with arginine vasopressin deficiency (formerly known as diabetes insipidus). In adult patients, it is usually acquired (notably during childhood), but can also be congenital, due to abnormal pituitary development.

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Lipodystrophy syndromes are rare diseases primarily affecting the development or maintenance of the adipose tissue but are also distressing indirectly multiple organs and tissues, often leading to reduced life expectancy and quality of life. Lipodystrophy syndromes are multifaceted disorders caused by genetic mutations or autoimmunity in the vast majority of cases. While many subtypes are now recognized and classified, the disease remains remarkably underdiagnosed.

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Context: Germline CDKN1B variants predispose patients to multiple endocrine neoplasia type 4 (MEN4), a rare MEN1-like syndrome, with <100 reported cases since its discovery in 2006. Although CDKN1B mutations are frequently suggested to explain cases of genetically negative MEN1, the prevalence and phenotype of MEN4 patients is poorly known, and genetic counseling is unclear.

Objective: To evaluate the prevalence of MEN4 in MEN1-suspected patients and characterize the phenotype of MEN4 patients.

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Objective: Carney complex (CNC) is a rare genetic syndrome, mostly due to germline loss-of-function pathogenic variants in PRKAR1A. Carney complex includes pigmented skin lesions, cardiac myxomas, primary pigmented nodular adrenocortical dysplasia, and various breast benign tumors.

Design: The present study was designed to describe the characteristics of breast lesions in CNC patients and their association with other manifestations of CNC and PRKAR1A genotype.

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  • The study examines the link between early beta cell function after islet transplantation (ITx) and long-term insulin independence in patients, focusing on data collected from 2000 to 2022.
  • Researchers found that primary graft function (PGF) was significantly lower in ITx recipients compared to those who received pancreas transplants (PTx) and normoglycemic controls.
  • The results showed that the 5-year insulin independence rates for certain types of PTx correlated well with predictions based on PGF, indicating similar long-term outcomes for both ITx and solitary PTx.
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  • Genetic lipodystrophies are underdiagnosed rare diseases that lead to various complications, and this study aimed to understand the diagnostic journey from the patients' perspectives.
  • A survey of 109 patients revealed a median age of 30 years at diagnosis, often after a long and challenging process involving multiple healthcare professionals, primarily endocrinologists.
  • Findings suggest that improved training for physicians to recognize and assess symptoms related to adipose tissue could enhance the diagnosis and management of these conditions.
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Objective: Steatotic liver disease (SLD) is frequent in individuals with obesity. In this study, type 2 diabetes (T2D), sex, and menopausal status were combined to refine the stratification of obesity regarding the risk of advanced SLD and gain further insight into disease physiopathology.

Methods: This study enrolled 1446 participants with obesity from the ABOS cohort (NCT01129297), who underwent extensive phenotyping, including liver histology and transcriptome profiling.

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Phospholipase A/acyltransferase 3 (PLAAT3) is a phospholipid-modifying enzyme predominantly expressed in neural and white adipose tissue (WAT). It is a potential drug target for metabolic syndrome, as Plaat3 deficiency in mice protects against diet-induced obesity. We identified seven patients from four unrelated consanguineous families, with homozygous loss-of-function variants in PLAAT3, who presented with a lipodystrophy syndrome with loss of fat varying from partial to generalized and associated with metabolic complications, as well as variable neurological features including demyelinating neuropathy and intellectual disability.

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  • Researchers are studying how the way cells use energy changes in pancreatic neuroendocrine tumors (pNETs), which is important for understanding how tumors grow.
  • They looked at different gene data and metabolic information to see how these tumors differ from healthy cells.
  • The study found unique metabolism patterns in pNETs that might affect tumor growth and could help in finding new ways to diagnose and treat these tumors in the future.
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  • Lamin A/C is crucial for nuclear stiffness, but its effects on whole-cell mechanics have not been well studied.
  • This research combines microfluidics and theoretical analysis to quantify how alterations in lamin A/C and prelamin A accumulation affect cell mechanics.
  • The findings indicate that changes in lamin A/C lead to increased cell viscosity, suggesting that whole-cell responses to mechanical stress involve both the nucleus and cytoskeletal components, which could help in diagnosing lamin-related diseases.
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  • * The condition is characterized by specific symptoms related to a pituitary tumor, such as headaches and joint pain, and can lead to various complications including cardiovascular and metabolic issues.
  • * Diagnosis involves elevated IGF-I levels and imaging to identify the pituitary tumor; treatment typically starts with surgery, but medication and radiation may be necessary for some patients, and care is best administered by a specialized multidisciplinary team.
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  • This study investigates the prevalence of endocrine tumors and related conditions in patients with neurofibromatosis type 1 (NF1) through systematic screening of 108 patients.
  • The results showed that 22.2% of patients had pheochromocytomas, with a smaller percentage presenting with gastroenteropancreatic neuroendocrine tumors (GEP-NETs) and gastrointestinal stromal tumors (GISTs).
  • The findings suggest that pheochromocytomas are more common in NF1 patients than previously thought, highlighting the importance of regular screening, particularly for young women.
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