Masafumi Koga

Summary

Publications

  1. ncbi Body mass index negatively regulates glycated albumin through insulin secretion in patients with type 2 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Chim Acta 438:19-23. 2015
  2. pmc Thresholds of various glycemic measures for diagnosing diabetes based on prevalence of retinopathy in community-dwelling Japanese subjects: the Hisayama Study
    Naoko Mukai
    Department of Environmental Medicine, Graduate School of Medical Sciences, Kyushu University, 3 1 1 Maidashi, Higashi ku, Fukuoka 812 8582, Japan
    Cardiovasc Diabetol 13:45. 2014
  3. ncbi Glycated albumin; clinical usefulness
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Chim Acta 433:96-104. 2014
  4. ncbi Degree of discrepancy between HbA1c and glycemia in variant hemoglobin is smaller when HbA1c is measured by new-type Arkray HPLC compared with old-type HPLC
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Biochem 47:123-5. 2014
  5. ncbi Calculation of HbA1c and glycated albumin from serially measured self-monitored blood glucose in patients with type 1 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Chim Acta 425:188-91. 2013
  6. ncbi Comparison of annual variability in HbA1c and glycated albumin in patients with type 1 vs. type 2 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, 5 21 1 Higashi uneno, Kawanishi 666 0195, Japan
    J Diabetes Complications 27:211-3. 2013
  7. ncbi Serum glycated albumin, but not glycated haemoglobin, is low in relation to glycemia in hyperuricemic men
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Kuruma zuka 3 1, Itami, Hyogo, 664 8533, Japan
    Acta Diabetol 47:173-7. 2010
  8. ncbi 1,5-Anhydroglucitol levels are low irrespective of plasma glucose levels in patients with chronic liver disease
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, Japan
    Ann Clin Biochem 48:121-5. 2011
  9. ncbi Glycated albumin levels are higher relative to glycated haemoglobin levels in gastrectomized subjects
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, USA
    Ann Clin Biochem 47:39-43. 2010
  10. ncbi Serum glycated albumin levels, but not glycated hemoglobin, is low in relation to glycemia in non-diabetic men with nonalcoholic fatty liver disease with high alanine aminotransferase levels
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, Japan
    Clin Biochem 43:1023-5. 2010

Collaborators

Detail Information

Publications30

  1. ncbi Body mass index negatively regulates glycated albumin through insulin secretion in patients with type 2 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Chim Acta 438:19-23. 2015
    ..However, whether this same mechanism exists in T2DM is unclear. We investigated the factor(s) which influence GA levels in T2DM patients...
  2. pmc Thresholds of various glycemic measures for diagnosing diabetes based on prevalence of retinopathy in community-dwelling Japanese subjects: the Hisayama Study
    Naoko Mukai
    Department of Environmental Medicine, Graduate School of Medical Sciences, Kyushu University, 3 1 1 Maidashi, Higashi ku, Fukuoka 812 8582, Japan
    Cardiovasc Diabetol 13:45. 2014
    ..We examined the optimal thresholds of various glycemic measures for diagnosing diabetes based on the prevalence of DR in community-dwelling Japanese subjects...
  3. ncbi Glycated albumin; clinical usefulness
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Chim Acta 433:96-104. 2014
    ..However, it is necessary to accumulate more evidences from large research studies on the effective directions for measuring GA. ..
  4. ncbi Degree of discrepancy between HbA1c and glycemia in variant hemoglobin is smaller when HbA1c is measured by new-type Arkray HPLC compared with old-type HPLC
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Biochem 47:123-5. 2014
    ..This study compared HbA1c values in subjects with variant hemoglobin measured using old-type Arkray HPLC (HA-8150) and new-type Arkray HPLC (HA-8160 or HA-8180)...
  5. ncbi Calculation of HbA1c and glycated albumin from serially measured self-monitored blood glucose in patients with type 1 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan Electronic address
    Clin Chim Acta 425:188-91. 2013
    ..Based on this principle, we developed formulas for calculation of HbA1c and GA using data from self-monitored blood glucose (SMBG). We also calculated HbA1c and GA in diabetic patients using the developed formulas...
  6. ncbi Comparison of annual variability in HbA1c and glycated albumin in patients with type 1 vs. type 2 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, 5 21 1 Higashi uneno, Kawanishi 666 0195, Japan
    J Diabetes Complications 27:211-3. 2013
    ....
  7. ncbi Serum glycated albumin, but not glycated haemoglobin, is low in relation to glycemia in hyperuricemic men
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Kuruma zuka 3 1, Itami, Hyogo, 664 8533, Japan
    Acta Diabetol 47:173-7. 2010
    ..Serum GA, but not HbA(1C), is set lower in relation to plasma glucose levels in hyperglycemic men. This may be caused by microinflammation associated with hyperuricemic state...
  8. ncbi 1,5-Anhydroglucitol levels are low irrespective of plasma glucose levels in patients with chronic liver disease
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, Japan
    Ann Clin Biochem 48:121-5. 2011
    ..Serum 1,5-anhydroglucitol (1,5-AG) is a known marker reflecting recent glycaemic control. In this study, we examined serum 1,5-AG levels in chronic liver disease (CLD) patients with and without diabetes mellitus...
  9. ncbi Glycated albumin levels are higher relative to glycated haemoglobin levels in gastrectomized subjects
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, USA
    Ann Clin Biochem 47:39-43. 2010
    ....
  10. ncbi Serum glycated albumin levels, but not glycated hemoglobin, is low in relation to glycemia in non-diabetic men with nonalcoholic fatty liver disease with high alanine aminotransferase levels
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, Japan
    Clin Biochem 43:1023-5. 2010
    ..Because patients with nonalcoholic fatty liver disease with high alanine aminotransferase (ALT) levels are reported to show high levels of hs-CRP, the relationship between serum ALT and serum GA levels was investigated...
  11. ncbi Study on the mechanism causing elevation of serum CA19-9 levels in diabetic patients
    Jun Murai
    Department of Internal Medicine, Kinki Central Hospital, Itami 664 8533, Japan
    Endocr J 60:885-91. 2013
    ..Taken all together, prolonged half-life of serum CA19-9 may contribute to the increase in serum CA19-9 levels in diabetic patients without obvious cancer. ..
  12. ncbi Profiles of atherosclerotic risk factors in gastrectomized men
    Jun Murai
    Department of Internal Medicine, Kinki Central Hospital, Itami, Japan
    Endocr J 58:657-62. 2011
    ..Additionally, levels of more emerging risk factors, such as hsCRP and baPWV were not altered among gastrectomized men...
  13. ncbi Habitual intake of dairy products influences serum 1,5-anhydroglucitol levels independently of plasma glucose
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Itami, Hyogo, Japan
    Diabetes Res Clin Pract 90:122-5. 2010
    ..In conclusion, habitual intake of dairy products was associated with low serum 1,5-AG levels, independently of plasma glucose levels...
  14. ncbi Serum glycated albumin levels are influenced by smoking status, independent of plasma glucose levels
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Kuruma zuka 3 1, Itami, Hyogo, 664 8533, Japan
    Acta Diabetol 46:141-4. 2009
    ..These findings suggest that the inflammation-induced acceleration of albumin metabolism may be involved in the mechanism by which smoking is associated with serum GA levels...
  15. ncbi The glycated albumin to HbA1c ratio is elevated in patients with fulminant type 1 diabetes mellitus with onset during pregnancy
    Masafumi Koga
    Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan
    J Med Invest 60:41-5. 2013
    ..0 in all P-FT1DM patients, whereas it was < 3.0 in 8 of 10 P-T2DM patients and all NP-T2DM patients. The GA/HbA1c ratio was also elevated in P-FT1DM patients at the diagnosis compared with T2DM with or without pregnancy...
  16. ncbi Usefulness of glycated albumin as an indicator of glycemic control status in patients with hemolytic anemia
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Kuruma zuka 3 1, Itami, Hyogo 664 8533, Japan
    Clin Chim Acta 412:253-7. 2011
    ..In the present study, we examined the usefulness of GA as an indicator of glycemic control status in patients with HA...
  17. pmc Glycated albumin and glycated hemoglobin are influenced differently by endogenous insulin secretion in patients with type 2 diabetes
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Itami, Hyogo, Japan
    Diabetes Care 33:270-2. 2010
    ..Glycated albumin (GA) relative to A1C is a useful marker of short-term glycemic control. We investigated whether endogenous insulin secretion in type 2 diabetes has different effects on GA and A1C levels...
  18. ncbi CLD (chronic liver diseases)-HbA1C as a suitable indicator for estimation of mean plasma glucose in patients with chronic liver diseases
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Kuruma zuka 3 1, Itami, Hyogo 664 8533, Japan
    Diabetes Res Clin Pract 81:258-62. 2008
    ..883), while no significant correlation between CLD-HbA(1C) and ChE was noted. In conclusion, CLD-HbA(1C) has been found a superior chronic glycemic control marker than HbA(1C) or GA in diabetic patients with chronic liver diseases...
  19. ncbi Clinical impact of glycated albumin as another glycemic control marker
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Itami, Japan
    Endocr J 57:751-62. 2010
    ....
  20. ncbi Usefulness of glycated albumin for early detection of deterioration of glycemic control state after discharge from educational admission
    Jun Murai
    Department of Internal Medicine, Kinki Central Hospital, Itami 664 8533, Japan
    Endocr J 60:409-13. 2013
    ..1 ± 0.7% to 8.3 ± 0.6%. Subsequently, HbA1c increased significantly to 9.0 ± 0.8% together with GA. Thus, GA is useful for early detection of deterioration of glycemic control state after discharge from educational admission...
  21. ncbi Influence of iron metabolism indices on glycated haemoglobin but not glycated albumin levels in premenopausal women
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Kuruma zuka 3 1, Itami, Hyogo 664 8533, Japan
    Acta Diabetol 47:65-9. 2010
    ..In conclusions, iron metabolism indices influence HbA(1C) levels, but not serum GA levels, in premenopausal women...
  22. ncbi Serum glycated albumin to haemoglobin A(1C) ratio can distinguish fulminant type 1 diabetes mellitus from type 2 diabetes mellitus
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo 664 8533, Japan
    Ann Clin Biochem 47:313-7. 2010
    ..This study investigated serum glycated albumin (GA), which reflects acute short-term changes in plasma glucose, as a new clinical index for FT1DM at disease onset...
  23. ncbi Serum dehydroepiandrosterone sulphate levels in patients with non-alcoholic fatty liver disease
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Japan
    Intern Med 50:1657-61. 2011
    ..In this study, we aimed to examine the clinical significance of serum DHEA sulfate (DHEAS) in patients with NAFLD...
  24. ncbi Glycated albumin levels are higher relative to HbA1c levels in people with autoimmune acute-onset type 1 diabetes mellitus than in people with type 2 diabetes mellitus at the time of diagnosis
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Itami, Hyogo, Japan
    Diabetes Res Clin Pract 94:e12-4. 2011
    ..This difference might reflect speed of increase in plasma glucose after the onset of diabetes...
  25. ncbi The glycated albumin to glycated haemoglobin ratio increases along with the fibrosis stage in non-alcoholic steatohepatitis
    Yukihiro Bando
    Department of Internal Medicine, Fukui Ken Saiseikai Hospital, Fukui 918 8503, Japan
    Ann Clin Biochem 49:387-90. 2012
    ..In this study, we aimed to investigate the clinical usefulness of measuring the G/H ratio for predicting the severity of liver fibrosis in patients with NASH...
  26. ncbi Negative association of obesity and its related chronic inflammation with serum glycated albumin but not glycated hemoglobin levels
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Itami, Hyogo, and Department of Medicine, Osaka University Graduate School of Medicine, Japan
    Clin Chim Acta 378:48-52. 2007
    ..The aim of this study was to examine whether BMI and the obesity-related inflammatory marker plasma high-sensitivity C-reactive protein (hs-CRP) are independently associated with GA and HbA1c...
  27. ncbi Serum 1,5-anhydroglucitol levels in patients with fulminant type 1 diabetes are lower than those in patients with type 2 diabetes
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Hyogo, Japan
    Clin Biochem 43:1265-7. 2010
    ..We investigated clinical relevance of serum 1,5-anhydroglucitol (1,5-AG) levels in fulminant type 1 diabetes mellitus (FT1DM) patients, because 1,5-AG is known to reflect short term glycemic control...
  28. ncbi Relationship between serum allantoin and urate in healthy subjects and effects of benzbromarone in gout patients
    Masafumi Kurajoh
    Division of Endocrinology and Metabolism, Department of Internal Medicine, Hyogo College of Medicine, Kinki Central Hospital, Japan
    Int J Clin Pharmacol Ther 50:265-71. 2012
    ..In addition, since uric acid has both pro- and antioxidant actions, a decrease in the serum concentration of uric acid may have an effect on the pro-oxidant-antioxidant balance...
  29. ncbi Body mass index negatively influences glycated albumin, but not glycated hemoglobin, in diabetic patients
    Masafumi Koga
    Department of Internal Medicine, Kinki Central Hospital, Itami, Hyogo, Japan
    Endocr J 53:387-91. 2006
    ..Only BMI was negatively correlated with the ratio of GA to HbA 1c. These results clearly demonstrate that GA levels are negatively influenced by BMI in diabetic patients...
  30. pmc A1C but not serum glycated albumin is elevated because of iron deficiency in late pregnancy in diabetic women
    Kunihiko Hashimoto
    Department of Internal Medicine, Aizenbashi Hospital, Osaka, Japan
    Diabetes Care 33:509-11. 2010
    ..CONCLUSIONS A1C levels, but not serum glycated albumin levels, are elevated in late pregnancy because of iron deficiency in diabetic women. Serum glycated albumin may offer an adequate marker for glycemic control during pregnancy...