Abstract
We retrospectively investigated the effect of switching from insulin glargine (IGlar) to insulin degludec (IDeg) on glycemic control in Japanese patients with type 1 diabetes mellitus. We also evaluated the dose of IDeg, and assessed weight gain and the risk of hypoglycemia after switching. Forty-five patients with type 1 diabetes were switched from IGlar (once daily or twice daily) to IDeg (once daily) during routine medical care. Data were collected for 16 weeks after switching from IGlar to IDeg. The mean HbA1c (%) in weeks 4, 8, 12, and 16 was lower than it was in week 0 (8.0 ± 1.0, 8.0 ± 1.4, 7.9 ± 1.1, 7.6 ± 1.0 vs. 8.3 ± 1.3 %, p < 0.01). The total basal insulin dose (TBD) was significantly lower after 16 weeks of IDeg as compared to IGlar treatment (0.30 ± 0.12 vs. 0.24 ± 0.11 U/kg/day, p = 0.001). In the twice-daily IGlar group, TBD showed a significant decrease from 0.33 ± 0.12 to 0.26 ± 0.11 U/kg/day (p < 0.001) after switching to IDeg. In the once-daily IGlar group, TBD showed a slight but not significant decrease from 0.23 ± 0.08 to 0.20 ± 0.09 U/kg/day (p = 0.97). Hypoglycemic episodes were transiently increased, but the change was not significant. The blood glucose fluctuation was evaluated from self-monitoring data and the coefficient of variation (CV) was calculated. The CV showed only a minimal change from 48.3 ± 17.1 to 48.6 ± 14.2 % at 12 weeks after switching to IDeg (p = 0.73). In conclusion, once-daily IDeg improved glycemic control in patients with type 1 diabetes compared to the control achieved with IGlar, without increasing the risk of hypoglycemia. When switching from IGlar (especially twice daily), it is recommended that the initial dose of IDeg should be reduced in order to decrease the risk of hypoglycemia.
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This work was conducted independently; no company or institution supported it financially. We thank Mrs. Yamagiwa and Mrs. Seki for secretarial assistance.
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We thank all the physicians who participated in this study. Yasuo Terauchi received honoraria for lectures from MSD K.K.; Ono Pharmaceutical Co., Ltd.; Nippon Boehringer Ingelheim Co., Ltd.; Novartis Pharma K.K.; Takeda Pharmaceutical Co., Ltd.; Mitsubishi Tanabe Pharma Corp.; Daiichi Sankyo Co., Ltd.; Sanwa Kagaku Kenkyusho Co., Ltd.; Kowa Pharmaceutical Co., Ltd.; Novo Nordisk Pharma Ltd.; Eli Lilly Japan K.K.; Sanofi K.K.; Shionogi & Co., Ltd.; Bayer Yakuhin, Ltd.; and AstraZeneca K.K., and obtained research support from MSD K.K.; Ono Pharmaceutical Co., Ltd.; Nippon Boehringer Ingelheim Co., Ltd.; Novartis Pharma K.K.; Takeda Pharmaceutical Co., Ltd.; Mitsubishi Tanabe Pharma Corp.; Daiichi Sankyo Co., Ltd.; Sanwa Kagaku Kenkyusho Co., Ltd.; Novo Nordisk Pharma Ltd.; Eli Lilly Japan K.K.; Sanofi K.K.; Dainippon Sumitomo Pharma Co., Ltd.; Shionogi & Co., Ltd.; Bayer Yakuhin, Ltd.; Astellas Pharma, Inc.; Pfizer Japan, Inc.; and AstraZeneca K.K. Tadashi Yamakawa received honoraria for lectures from MSD K.K.; Kowa Pharmaceutical Co., Ltd.; Novo Nordisk Pharma Ltd.; and Sanofi K.K., and obtained research support from AstraZeneca K.K. Jun Suzuki, Joe Nagakura, Erina Shigematsu, and Kazuaki Kadonosono declare that they have no conflict of interest.
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All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (Yokohama City University School of Medicine, an Ethical Committee) and with the Helsinki Declaration of 1964 and its subsequent revision.
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Suzuki, J., Yamakawa, T., Nagakura, J. et al. Efficacy of switching from insulin glargine to insulin degludec in patients with type 1 diabetes: a 16-week retrospective study. Diabetol Int 8, 45–51 (2017). https://doi.org/10.1007/s13340-016-0275-x
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DOI: https://doi.org/10.1007/s13340-016-0275-x