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Original Articles
Polymorphisms of the Reg1α Gene and Early Onset Type 2 Diabetes in the Korean Population
Bo Kyung Koo, Young Min Cho, Kuchan Kimm, Jong-Young Lee, Bermseok Oh, Byung Lae Park, Hyun Sub Cheong, Hyoung Doo Shin, Kyung Soo Ko, Sang Gyu Park, Hong Kyu Lee, Kyong Soo Park
Korean Diabetes J. 2010;34(4):229-236.   Published online August 31, 2010
DOI: https://doi.org/10.4093/kdj.2010.34.4.229
  • 3,747 View
  • 23 Download
  • 2 Crossref
AbstractAbstract PDFPubReader   
Background

The Reg gene has been reported to be expressed in regenerating islets and Reg1 protein to be up-regulated at an early stage of diabetes in mice. As human Reg1α is homologous with murine Reg1, we investigated whether common variants in Reg1α are associated with type 2 diabetes in the Korean population.

Methods

We sequenced the Reg1α gene to identify common polymorphisms using 24 Korean DNA samples. Of 11 polymorphisms found, five common ones (g.-385T>C [rs10165462], g.-36T>G [rs25689789], g.209G>T [rs2070707], g.1385C>G [novel], and g.2199G>A [novel]) were genotyped in 752 type 2 diabetic patients and 642 non-diabetic subjects.

Results

No polymorphism was associated with the risk of type 2 diabetes. However, g.-385C and g.2199A lowered the risk of early-onset type 2 diabetes, defined as a diagnosis in subjects whose age at diagnosis was 25 years or more but less than 40 years (odds ratio [OR], 0.721 [0.535 to 0.971] and 0.731 [0.546 to 0.977] for g.-385C and g.2199A, respectively) and g.1385G increased the risk of early-onset diabetes (OR, 1.398 [1.055 to 1.854]). Although adjusting for errors in multiple hypotheses-testing showed no statistically significant association between the three individual polymorphisms and early-onset diabetes, the haplotype H1, composed of g.-385C, g.1385C, and g.2199A, was associated with a reduced risk of early-onset diabetes (OR, 0.590 [0.396 to 0.877], P = 0.009).

Conclusion

Polymorphisms in the Reg1α were not found to be associated with overall susceptibility to type 2 diabetes, though some showed modest associations with early-onset type 2 diabetes in the Korean population.

Citations

Citations to this article as recorded by  
  • A Novel Variant Of Regenerating Iα Gene (REG) In Type II Diabetics Among Pakistani Targeted Population
    Sadaf Saleem, Saeeda Baig, Sadia Farrukh, Mazhar Shafiq
    Journal of Rawalpindi Medical College.2023;[Epub]     CrossRef
  • Glycemic Effects of Once-a-Day Rapid-Acting Insulin Analogue Addition on a Basal Insulin Analogue in Korean Subjects with Poorly Controlled Type 2 Diabetes Mellitus
    Eun Yeong Choe, Yong-ho Lee, Byung-Wan Lee, Eun-Seok Kang, Bong Soo Cha, Hyun Chul Lee
    Diabetes & Metabolism Journal.2012; 36(3): 230.     CrossRef
Effect of Adipose Differentiation-Related Protein (ADRP) on Glucose Uptake of Skeletal Muscle.
Yun Hyi Ku, Min Kim, Sena Kim, Ho Seon Park, Han Jong Kim, In Kyu Lee, Dong Hoon Shin, Sung Soo Chung, Sang Gyu Park, Young Min Cho, Hong Kyu Lee, Kyong Soo Park
Korean Diabetes J. 2009;33(3):206-214.   Published online June 1, 2009
DOI: https://doi.org/10.4093/kdj.2009.33.3.206
  • 2,177 View
  • 24 Download
AbstractAbstract PDF
BACKGROUND
Skeletal muscle is the most important tissue contributing to insulin resistance. Several studies have shown that accumulation of intramyocellular lipid is associated with the development of insulin resistance. Thus, proteins involved in lipid transport, storage and metabolism might also be involved in insulin action in skeletal muscle. Adipose differentiation-related protein (ADRP), which is localized at the surface of lipid droplets, is known to be regulated by peroxisome proliferator activated receptor gamma (PPARgamma). However, it is not known whether ADRP plays a role in regulating glucose uptake and insulin action in skeletal muscle. METHODS: ADRP expression in skeletal muscle was measured by RT-PCR and western blot in db/db mice with and without PPARgamma agonist. The effect of PPARgamma agonist or high lipid concentration (0.4% intralipos) on ADRP expression was also obtained in cultured human skeletal muscle cells. Glucose uptake was measured when ADRP was down-regulated with siRNA or when ADRP was overexpressed with adenovirus. RESULTS: ADRP expression increased in the skeletal muscle of db/db mice in comparison with normal controls and tended to increase with the treatment of PPARgamma agonist. In cultured human skeletal muscle cells, the treatment of PPARgamma agonist or high lipid concentration increased ADRP expression. siADRP treatment decreased both basal and insulin-stimulated glucose uptake whereas ADRP overexpression increased glucose uptake in cultured human skeletal muscle cells. CONCLUSION: ADRP expression in skeletal muscle is increased by PPARgamma agonist or exposure to high lipid concentration. In these conditions, increased ADRP contributed to increase glucose uptake. These results suggest that insulin-sensitizing effects of PPARgamma are at least partially achieved by the increase of ADRP expression, and ADRP has a protective effect against intramyocellular lipid-induced insulin resistance.

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