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Updated: May 15, 2025
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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
Published on: May 22, 2013
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Telomere Length as Both Cause and Consequence in Type 1 Diabetes: Evidence from Bidirectional Mendelian Randomization
Guanping Wei1, Ruiping Chen2, Shupeng Liu3
1Department of Emergency, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China.
Biomedicines
|April 29, 2025
Summary
Shortened telomere length (TL) increases Type 1 diabetes (T1D) risk. T1D and its complications may affect TL, with insulin playing a key role in this complex relationship, suggesting telomere biology
Area of Science:
- Genetics
- Metabolic Diseases
- Cellular Biology
Background:
- Diabetes mellitus is a global metabolic disorder with severe complications.
- Telomere length (TL), a marker of cellular homeostasis, is potentially linked to diabetes progression.
- The causal link between diabetes and TL, and its role in disease development, requires clarification.
Purpose of the Study:
- To investigate the bidirectional causal relationship between telomere length and Type 1 diabetes (T1D) using Mendelian randomization.
- To explore the influence of T1D and its complications on telomere length.
- To understand the role of cellular homeostasis in diabetes pathogenesis.
Main Methods:
- Bidirectional Mendelian randomization (MR) analysis utilizing genome-wide association study (GWAS) data.
- Rigorous quality control of instrumental variables and application of the inverse variance weighted (IVW) method.
- Sensitivity analyses were performed to ensure result robustness.
Main Results:
- Shortened TL significantly elevates the risk of Type 1 diabetes (T1D) and unspecified diabetes.
- A positive causal link was found between TL and diabetes complications like nephropathy and ketoacidosis.
- T1D and its complications showed a causal effect on TL, which was mediated by insulin use.
Conclusions:
- A complex bidirectional relationship exists between TL and T1D.
- Short telomeres are a risk factor for T1D, while T1D may induce compensatory changes in telomere maintenance.
- Insulin significantly modulates the impact of T1D on TL, highlighting telomere biology's role in T1D pathogenesis.
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