*P<0.05 compared with the lowest KLHL1 antibody tertile from the TukeyKramer method. Abbreviation:Cr, creatinine. == Number 2. only among NGT subjects (P=0.001 for tendency). Association between GE and isoprostane was significant when adjustment was made for age, sex, smoking status, body mass index, C-reactive protein, glucose tolerance status, and homeostatic model assessment (P=0.029), but the association with MGC was not significant. == Summary == Our results suggest the possibility that GE might result in oxidative stress, and the relationship is stronger than that for MGC. Keywords:glucose excursion, glucose-tolerance test, oxidative stress == Intro == Type 2 diabetes is definitely characterized by a high incidence of cardiovascular disease (CVD).1Diabetes individuals show two- to fourfold increased risk compared to subjects without diabetes, even when the analysis is adjusted for a number of cardiovascular risk factors.2However, reduction of hyperglycemia expressed as glycated hemoglobin showed only a weak relation to risk of macrovascular complications compared with microvascular complications.3On the other hand, recently there has been increasing evidence that postprandial hyperglycemia might perform an important part in the development of atherosclerosis,4CVD,5and diabetes mellitus (DM) complications.6The DECODE (Diabetes Epidemiology: Collaborative analysis Of Diagnostic Caudatin criteria in Europe) analysis reported that high blood glucose concentrations 2 hours after weight in the glucose-tolerance test (GTT) are associated with increased risk of death, independently of fasting blood glucose.7Also, the Funagata Diabetes Study8and AusDiab (Australian Diabetes, Obesity, and Lifestyle Study)9concluded that impaired glucose tolerance (IGT), but not impaired fasting glucose, is a risk element for death from CVD. In addition, the LURIC (LUdwigshafen RIsk and Cardiovascular health) study reported that postchallenge hyperglycemia recognized a high-risk group for CVD mortality undetected by fasting glucose and/or glycated hemoglobin.10These Caudatin findings suggest that temporary hyperglycemia, ie, high levels of glucose Caudatin excursion (GE), is associated with the development of CVD. Activation of oxidative stress is thought to be related to injury of various organs, with evidence progressively indicating that oxidative stress may play an important part in DM vascular complications.11Several in vitro studies have demonstrated increased expression of markers of oxidative stress in cells exposed to high GE.12,13In addition, GE data that were from continuous glucose monitoring carried out during the day indicated a more specific triggering effect on oxidative stress than chronic sustained hyperglycemia among type 2 DM patients.14However, not only is the effect of GE or glucose elevation about oxidative stress unclear in subjects with or without diabetes, but how the effect differs with differing glucose-tolerance status is also unclear. Therefore, we compared GE and glucose elevation derived from a 75 g oral GTT with urine isoprostane, a well-recognized marker of oxidative stress,15,16to study the effects of GE by subtracting the minimum amount from the maximum glucose value among fasting, 1-hour, and 2-hour afterload of GTT, or imply glucose concentration (MGC) from all three glucose values, and different glucose-tolerance status on oxidative stress in Japanese People in america living in Hawaii and Los Angeles, who share a virtually identical genetic makeup with native Japanese currently living in Japan. In a earlier study, we demonstrated the prevalence as well as incidence of type 2 DM and carotid intima-media thickness were significantly higher in Japanese People in america than in native Japanese, which suggests the Westernization of life-style may promote the development of preclinical atherosclerosis in Japanese.17 == Materials and methods == == Experimental design == This survey was portion of a long-term epidemiological study initiated in 1970 of risk factors for DM and CVD, in which the subjects were limited to a human population genetically identical to the Japanese human population. The epidemiological study offers previously been explained in detail elsewhere.17,18The subject matter of our study were 775 Japanese Americans (302 men and 473 women) enrolled in a medical survey conducted in Hawaii in 2002 or Los Angeles in 2004, including persons who have been under treatment for hyperlipidemia and/or hypertension. All subjects had glucose-tolerance status ascertained by GTT and were diagnosed according to the 1998 World Caudatin Health Organization criteria.19They.