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Glycemic Benefit of Insulin Degludec/Insulin Aspart Compared to Basal Insulin in Type 2 Diabetes Mellitus Associated with Impaired Glucagon-Like Peptide-1 Response: A Randomized Crossover Trial
Han Na Jang, Eun Shil Hong, Ye Seul Yang, Seong Ok Lee, Myoung-jin Jang, Andrea Mari, Soo Heon Kwak, Kyong Soo Park, Hak Chul Jang, Hye Seung Jung
Received November 21, 2024  Accepted April 28, 2025  Published online August 14, 2025  
DOI: https://doi.org/10.4093/dmj.2024.0741    [Epub ahead of print]
  • 1,707 View
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
We aimed to confirm that once-daily insulin degludec/insulin aspart (IDegAsp) is superior to basal insulin therapy in participants with type 2 diabetes mellitus (T2DM) exhibiting signs of overbasalization. Additionally, we analyzed incretin profiles in relation to the benefits of IDegAsp, providing insights into the underlying mechanisms.
Methods
A prospective study was conducted in participants receiving basal insulin therapy, with a fasting plasma glucose (FPG) level lower than predicted from their glycosylated hemoglobin (HbA1c). Participants were randomly assigned to either IDegAsp or insulin glargine (IGlar) in a 1:1 ratio. After 20 weeks of treatment, the insulins were switched in a crossover design. The primary endpoint was the change in HbA1c from baseline. Incretin profiles, hypoglycemic events, and continuous glucose monitoring (CGM) were also analyzed (Trial registration: www.cris.nih.go.kr; KCT0004597).
Results
The study included 55 participants (male 40%, mean age 65 years, FPG 103 mg/dL, and HbA1c 8.3%). HbA1c significantly decreased to 7.8%±0.8% with IDegAsp, compared to 8.0%±0.7% with IGlar. The mean estimated treatment difference of changes was –0.21% points (95% confidence interval, –0.39 to –0.02; P=0.031), favoring IDegAsp. Hypoglycemic events were comparable. CGM demonstrated significantly lower glucose measures during the daytime with IDegAsp compared to IGlar, and vice versa at dawn. The HbA1c benefit of IDegAsp over IGlar was associated with a low glucagon-like peptide-1 (GLP-1) ratio at 30 minutes relative to baseline (r=0.301, P=0.040), while not with glucose-dependent insulinotropic polypeptide.
Conclusion
The greater reduction in HbA1c achieved with IDegAsp compared to IGlar in individuals with T2DM was associated with an impaired GLP-1 response, facilitating personalized insulin therapy.
Review
Complications
Article image
Pharmacological and Nonpharmacological Treatments for Painful Diabetic Peripheral Neuropathy
Han Na Jang, Tae Jung Oh
Diabetes Metab J. 2023;47(6):743-756.   Published online September 6, 2023
DOI: https://doi.org/10.4093/dmj.2023.0018
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  • 50 Web of Science
  • 54 Crossref
AbstractAbstract PDFPubReader   ePub   
Diabetic peripheral neuropathy (DPN) is one of the most prevalent chronic complications of diabetes. The lifetime prevalence of DPN is thought to be >50%, and 15%–25% of patients with diabetes experience neuropathic pain, referred to as “painful DPN.” Appropriate treatment of painful DPN is important because this pain contributes to a poor quality of life by causing sleep disturbance, anxiety, and depression. The basic principle for the management of painful DPN is to control hyperglycemia and other modifiable risk factors, but these may be insufficient for preventing or improving DPN. Because there is no promising diseasemodifying medication for DPN, the pain itself needs to be managed when treating painful DPN. Drugs for neuropathic pain, such as gabapentinoids, serotonin–norepinephrine reuptake inhibitors, tricyclic antidepressants, alpha-lipoic acid, sodium channel blockers, and topical capsaicin, are used for the management of painful DPN. The U.S. Food and Drug Administration (FDA) has approved pregabalin, duloxetine, tapentadol, and the 8% capsaicin patch as drugs for the treatment of painful DPN. Recently, spinal cord stimulation using electrical stimulation is approved by the FDA for the treatment for painful DPN. This review describes the currently available pharmacological and nonpharmacological treatments for painful DPN.

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Original Article
Complications
Prevalence of Diabetic Retinopathy in Undiagnosed Diabetic Patients: A Nationwide Population-Based Study
Han Na Jang, Min Kyong Moon, Bo Kyung Koo
Diabetes Metab J. 2022;46(4):620-629.   Published online February 23, 2022
DOI: https://doi.org/10.4093/dmj.2021.0099
  • 9,032 View
  • 252 Download
  • 13 Web of Science
  • 14 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
We investigated the prevalence of diabetic retinopathy (DR) in patients with undiagnosed diabetes through a nationwide survey, compared to those with known diabetes.
Methods
Among the participants of the Korean National Health and Nutrition Examination Surveys (KNHANES) from 2017 to 2018, individuals aged ≥40 years with diabetes and fundus exam results were enrolled. Sampling weights were applied to represent the entire Korean population. Newly detected diabetes patients through KNHANES were classified under “undiagnosed diabetes.”
Results
Among a total of 9,108 participants aged ≥40 years, 951 were selected for analysis. Of them, 31.3% (standard error, ±2.0%) were classified under “undiagnosed diabetes.” The prevalence of DR in patients with known and undiagnosed diabetes was 24.5%±2.0% and 10.7%±2.2%, respectively (P<0.001). The DR prevalence increased with rising glycosylated hemoglobin (HbA1c) levels in patients with known and undiagnosed diabetes (P for trend=0.001 in both). Among those with undiagnosed diabetes, the prevalence of DR was 6.9%±2.1%, 8.0%±3.4%, 5.6%±5.7%, 16.7%±9.4%, and 42.6%±14.8% for HbA1c levels of <7.0%, 7.0%–7.9%, 8.0%–8.9%, 9.0%–9.9%, and ≥10.0% respectively. There was no difference in the prevalence of hypertension, dyslipidemia, hypertriglyceridemia, or obesity according to the presence or absence of DR.
Conclusion
About one-third of patients with diabetes were unaware of their diabetes, and 10% of them have already developed DR. Considering increasing the prevalence of DR according to HbA1c level was found in patients with undiagnosed diabetes like those with known diabetes, screening and early detection of diabetes and DR are important.

Citations

Citations to this article as recorded by  
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