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Diabetes Mellitus: Overview and Type I Subtype01:22

Diabetes Mellitus: Overview and Type I Subtype

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Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
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Proteoglycans01:05

Proteoglycans

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Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
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Diabetes Mellitus: Type 2 and Gestational01:22

Diabetes Mellitus: Type 2 and Gestational

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Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
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Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

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Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
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Protein Glycosylation01:25

Protein Glycosylation

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Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
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Diabetes: Symptoms, Diagnosis, and Complications01:15

Diabetes: Symptoms, Diagnosis, and Complications

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For most patients, experiencing several weeks of polyuria, polydipsia, fatigue, and significant weight loss may indicate the presence of diabetes. Furthermore, adults displaying the phenotypic appearance of type 2 diabetes (particularly those who are obese and not initially insulin-requiring), may have islet cell autoantibodies, suggesting autoimmune-mediated β cell destruction and a diagnosis of latent autoimmune diabetes of adults (LADA). The categorization of glucose homeostasis is...
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Printed Glycan Array: A Sensitive Technique for the Analysis of the Repertoire of Circulating Anti-carbohydrate Antibodies in Small Animals
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疾患特有のグリコシレーションを解読:血清グリコパターンによる糖尿病サブタイプを解読

Rumeng Zhang1, Yu Zhou2, Shengye Wen1,3

  • 1Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China.

Analytical and bioanalytical chemistry
|September 6, 2025
PubMed
まとめ

新しいA.NGアルゴリズムは,血液中のユニークなN-グリカンパターンを検出し,成人における潜在的自己免疫糖尿病 (LADA) と1型および2型糖尿病を区別し,診断の正確性を向上させます.

キーワード:
バイオマーカー糖尿病グリカン大人の潜在的自己免疫糖尿病マススペクトロメトリー

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Printed Glycan Array: A Sensitive Technique for the Analysis of the Repertoire of Circulating Anti-carbohydrate Antibodies in Small Animals
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Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases
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Glycan Node Analysis: A Bottom-up Approach to Glycomics
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Glycan Node Analysis: A Bottom-up Approach to Glycomics

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科学分野:

  • 内分泌学と代謝
  • 免疫学
  • グリコミクス

背景:

  • 大人の潜在的自己免疫糖尿病 (LADA) は,タイプ1糖尿病 (T1D) と重複する特徴があるため,しばしばタイプ2糖尿病 (T2D) と誤診される独特の糖尿病サブタイプです.
  • LADAの正確な差別化は適切な治療と管理に不可欠であり,誤診は最適でない治療戦略につながる可能性があります.
  • 現在の診断方法は,LADAと他の糖尿病の形態を十分に区別できないため,新しいアプローチが必要になります.

研究 の 目的:

  • LADAをT1DとT2Dと区別するための新しいアルゴリズム (A.NG) の開発と検証
  • 糖尿病のサブタイプに特異的な変化を特定するためにMALDIを用いたN-グリカンプロファイリングの可能性を調査する.
  • LADAに関連したグリコシレーションの変化における特定の酵素の役割を調査し,潜在的なバイオマーカーを特定する.

主な方法:

  • 血清における上調と下調のN-グリカン比率を計算するためのA.NGアルゴリズムの開発
  • マトリックスアシストレーザー脱吸収イオン化 (MALDI) を利用して,包括的なN-グリカンプロファイリングを行う.
  • FUT8やFUCA1のような酵素の貢献を調査するために,ELISAと不変のグリコペプチド分析を用いる.

主要な成果:

  • A.NGアルゴリズムは,T1D,T2D,LADAを区別する明確なN-グリカンパターンを成功裏に特定し,AUC0. 918を達成しました.
  • 特定の糖尿病サブタイプと相関するグリカン変化が観察され,分化のためのグリコプロファイリングの実現可能性が示されました.
  • 酵素分析により,FUT8とFUCA1が,LADAにおける変化したグリコタンパク質のグリコシル化に潜在的に関与していることが明らかになった.

結論:

  • A.NGアルゴリズムは,T1DとT2Dを区別するための新しいツールとして有望である.
  • 血清のN-グリカンプロファイリングは,糖尿病サブタイプ特有のバイオマーカーを特定するための有効な戦略を提供します.
  • LADAの診断と管理のための臨床的有用性を確立するために,精密な定量化によるより大きなコホートでのさらなる検証が必要である.