Abstract
Aims
The association between β-cell function and glycemic variability remains to be clarified in insulin-treated patients with type 2 diabetes. Therefore, the study sought to examine the association of various indices of β-cell function with glycemic variability in Chinese insulin-treated patients with type 2 diabetes.
Methods
Glycemic variability was assessed by the coefficient of variation (CV) of glucose levels with the use of continuous glucose monitoring (CGM). Basal β-cell function was evaluated by fasting C-peptide (FCP) and the homeostasis model assessment 2 for β-cell function (HOMA2-%β). Postload β-cell function was measured by 2-hour C-peptide (2hCP) and the acute C-peptide response (ACPR) to arginine.
Results
When a cutoff value of CV ≥ 36% was used to define unstable glucose, the multivariable-adjusted odds ratios for labile glycemic control were 0.34 (95% CI 0.18–0.64) for each 1 ng/mL increase in ACPR, 0.47 (95% CI 0.27–0.81) for each 1 ng/mL increase in FCP, 0.77 (95% CI 0.61–0.97) for each 1 ng/mL increase in 2hCP, and 1.00 (95% CI 0.98–1.01) for each 1% increase in HOMA2-%β. When we further adjusted for 2hCP and HOMA2-%β in the ACPR and FCP analyses, and adjusted for ACPR or FCP in the 2hCP analyses, only ACPR but not FCP or 2hPC remained to be a significant and inverse predictor for labile glycemic control.
Conclusions
ACPR evaluated by the arginine stimulation test may be superior to other commonly used β-cell function parameters to reflect glycemic fluctuation in insulin-treated patients with type 2 diabetes.
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Abbreviations
- 2hCP:
-
2-hour C-peptide
- 2hPG:
-
2-hour plasma glucose
- ACPR:
-
acute C-peptide response
- AST:
-
arginine stimulation test
- BMI:
-
body mass index
- CGM:
-
continuous glucose monitoring
- CV:
-
coefficient of variation
- FCP:
-
fasting C-peptide
- FPG:
-
fasting plasma glucose
- HbA1c :
-
glycated hemoglobin A1c
- HDL-c:
-
high-density lipoprotein cholesterol
- HOMA2-%β:
-
homeostasis model assessment 2 for β-cell function
- HOMA2-IR:
-
homeostasis model assessment 2 of insulin resistance
- LDL-c:
-
low-density lipoprotein cholesterol
- TC:
-
total cholesterol
- TGs:
-
triglycerides.
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Acknowledgements
We would like to thank all the involved clinicians, nurses, and technicians for helping with the study. We are grateful to all participants for their dedication in data collection and laboratory measurements.
Authors contributions
J.Z. and G.H. conceived and designed the study. Y.S. (Y Si), Y.S. (Y Shen) and J.L. contributed to data collection, data analysis, and writing the paper. Y.S. (Y Si), L.Z. and Y.M. contributed to data analysis. W.L. and W.Z. contributed to conduction of study and data collection. X.M., Y.B. and J.Z. contributed to interpretation of data and revision of the paper. G.H. critically reviewed and edited the paper. All authors revised the paper for important intellectual content and have approved the final version.
Funding
This work was funded by the National Key R&D Program of China (2018YFC2001004), the Shanghai Municipal Education Commission—Gaofeng Clinical Medicine Grant Support (20161430) and Shanghai Municipal Key Clinical Specialty.
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All procedures performed in the study involving human participants were in accordance with the ethical standards of the Ethics Committee of Shanghai Jiao Tong University Affiliated Sixth People’s Hospital and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Si, Y., Shen, Y., Lu, J. et al. Impact of acute-phase insulin secretion on glycemic variability in insulin-treated patients with type 2 diabetes. Endocrine 68, 116–123 (2020). https://doi.org/10.1007/s12020-020-02201-y
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DOI: https://doi.org/10.1007/s12020-020-02201-y