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Type 1 diabetes mellitus typically presents with rapid-onset symptoms due to the body’s inability to utilize glucose in the absence of insulin. Since insulin is required for glucose uptake into cells, its deficiency leads to hyperglycemia and cellular energy deprivation, resulting in characteristic clinical features.Polyuria and PolydipsiaOne of the earliest, most prominent symptoms is polyuria (excessive urination). When blood glucose concentrations rise above the renal threshold, the...
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Type II Diabetes Mellitus III: Clinical Manifestations and Diagnosis01:25

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Type 2 diabetes mellitus develops gradually and is often asymptomatic in early stages.Clinical ManifestationsWhen symptoms appear, they include fatigue, blurred vision, pruritus, delayed wound healing, and recurrent infections, particularly candidal infections. Peripheral neuropathy may present as numbness or tingling in the extremities. Classic hyperglycemia symptoms—polyuria, polydipsia, and polyphagia—are less common. Most patients are overweight and frequently have associated...
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Type I Diabetes II: Pathophysiology01:26

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Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular...
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Type II Diabetes I: Introduction01:26

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Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
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Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1...
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[Early onset diabetes mellitus].

K Busiah1, L Vaivre-Douret2, C Yachi3

  • 1Endocrinologie, gynécologie et diabétologie pédiatrique, hôpital Necker-Enfants malades (AP-HP), affiliation IMAGINE, 149 rue de Sèvres, 75015 Paris, France; Université Paris-Descartes, Sorbonne-Paris-Cité, 12 rue de l'École-de-Médecine, 75270 Paris Cedex 06, France; Inserm U845, faculté de médecine Cochin, 24 rue du faubourg Saint-Jacques, 75014 Paris, France.

Archives De Pediatrie : Organe Officiel De La Societe Francaise De Pediatrie
|December 24, 2013
PubMed
Summary
This summary is machine-generated.

Neonatal diabetes mellitus, a rare hyperglycemia in infants, has genetic causes like 6q24 abnormalities or KATP channel gene mutations. While some cases remit, recurrence is common, and KATP-related forms may involve developmental issues.

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Area of Science:

  • Endocrinology
  • Genetics
  • Pediatrics

Context:

  • Neonatal diabetes mellitus (NDM) is a rare condition characterized by hyperglycemia in the first year of life.
  • It can be transient, resolving early, or permanent, requiring lifelong management.
  • Pathophysiology involves beta-cell dysfunction or absence, with genetic factors playing a key role.

Purpose:

  • To elucidate the genetic underpinnings and clinical features of neonatal diabetes mellitus.
  • To differentiate between subtypes based on genetic causes (6q24 abnormalities vs. KATP channel gene mutations).
  • To analyze remission rates, recurrence patterns, and associated neurodevelopmental outcomes.

Summary:

  • NDM arises from 6q24 abnormalities or mutations in ABCC8/KCNJ11 (KATP channel) genes.
  • The 6q24 subtype presents with distinct features like congenital anomalies and intrauterine growth restriction.
  • Remission occurs in 51% of cases, with common pubertal recurrence (82-86%).
  • KATP-related NDM is associated with developmental delays, epilepsy, and neurodevelopmental disorders.

Impact:

  • Provides insights into the distinct clinical presentations and genetic etiologies of NDM subtypes.
  • Highlights the high recurrence rate of NDM, particularly at puberty.
  • Underscores the importance of genetic testing for accurate diagnosis and management, including monitoring for neurodevelopmental sequelae.