The missing heritability in type 1 diabetes

© 2022 The Authors. Diabetes, Obesity and Metabolism published by John Wiley & Sons Ltd..

Type 1 diabetes (T1D) is a complex autoimmune disease characterized by an absolute deficiency of insulin. It affects more than 20 million people worldwide and imposes an enormous financial burden on patients. The underlying pathogenic mechanisms of T1D are still obscure, but it is widely accepted that both genetics and the environment play an important role in its onset and development. Previous studies have identified more than 60 susceptible loci associated with T1D, explaining approximately 80%-85% of the heritability. However, most identified variants confer only small increases in risk, which restricts their potential clinical application. In addition, there is still a so-called 'missing heritability' phenomenon. While the gap between known heritability and true heritability in T1D is small compared with that in other complex traits and disorders, further elucidation of T1D genetics has the potential to bring novel insights into its aetiology and provide new therapeutic targets. Many hypotheses have been proposed to explain the missing heritability, including variants remaining to be found (variants with small effect sizes, rare variants and structural variants) and interactions (gene-gene and gene-environment interactions; e.g. epigenetic effects). In the following review, we introduce the possible sources of missing heritability and discuss the existing related knowledge in the context of T1D.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:24

Enthalten in:

Diabetes, obesity & metabolism - 24(2022), 10 vom: 15. Okt., Seite 1901-1911

Sprache:

Englisch

Beteiligte Personen:

Pang, Haipeng [VerfasserIn]
Lin, Jian [VerfasserIn]
Luo, Shuoming [VerfasserIn]
Huang, Gan [VerfasserIn]
Li, Xia [VerfasserIn]
Xie, Zhiguo [VerfasserIn]
Zhou, Zhiguang [VerfasserIn]

Links:

Volltext

Themen:

Gene-environment interactions
Gene-gene interactions
Journal Article
Missing heritability
Rare variants
Research Support, Non-U.S. Gov't
Review
Structural variants
Type 1 diabetes

Anmerkungen:

Date Completed 08.09.2022

Date Revised 15.10.2022

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1111/dom.14777

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM341264520