著者

Arisa Sato Yoshinori Ohtsuka Yujiro Yamanaka

出版者

Tohoku University Medical Press

雑誌

The Tohoku Journal of Experimental Medicine (ISSN:00408727)

巻号頁・発行日

vol.249, no.3, pp.193-201, 2019 (Released:2019-11-23)

参考文献数

45

被引用文献数

3 13

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Postprandial glucose concentration is dependent on the time of day and its concentration in the morning is lower than in the evening. However, whether it is dependent on mastication at different times of the day has not been studied before. We hypothesized that mastication affects insulin-mediated glucose metabolism differently in the morning and evening in healthy individuals. Firstly, nine healthy male volunteers (22.0 ± 0.7 SEM years, body mass index 22.0 ± 1.0 kg/m2) performed a 75-g oral glucose tolerance test (OGTT). One week after the OGTT, they participated in a high-carbohydrate food (rice) consumption test with 10 or 40 chews per mouthful. Each experiment was conducted in the morning (0800 h) and evening (2000 h) on the same day. Blood samples were collected before and at 30-min intervals for 120 min after glucose or rice consumption. The incremental area under the curve (iAUC) for glucose in the OGTT was significantly lower in the morning than in the evening, whereas the iAUC for insulin was similar at both times. In participants who chewed 40 times, the iAUC for glucose after rice consumption was significantly lower in the morning than in the evening but was similar at both times in individuals who chewed 10 times. Chewing 40 times in the morning (but not the evening) significantly increased insulin secretion at 30 min. This suggests that morning mastication improves early-phase insulin secretion after rice consumption. This novel finding may aid in reducing the incidence of obesity and type 2 diabetes mellitus.

著者

Yoshinori OHTSUKA Mitsuru MUNAKATA Kazunori TANIMURA Hideaki UKITA Hirotaka KUSAKA Yoshitaka MASAKI Isamu DOI Masashi OHE Masaru AMISHIMA Yukihiko HOMMA Yoshikazu KAWAKAMI

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.34, no.10, pp.966-971, 1995 (Released:2006-03-27)

参考文献数

36

被引用文献数

44 72

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Although the prevalence of serum precipitating antibodies for farmer's lung disease (FLD) is lower in smokers than in nonsmokers and FLD predominates in nonsmokers, the affects of smoking on the clinical course of the disease is not known. We compared the clinical findings and the prognosis between 12 smokers (SM-FLD) and 31 non-smokers with FLD (NS-FLD). There was no difference in age, sex, working years on farm, clinical symptoms, laboratory findings, radiographic findings, between the two groups. However, for the type of onset on the first visit for FLD, "acute single episode" type was less common, and "recurrent" and "insidious onset" types were more common in SM-FLD than in NS-FLD (8.3 vs 58.1, 91.7 vs 41.9%, respectively, p<0.05). Although working status and mask wearing status were not significantly different between the two groups after the diagnosis of FLD, patients with symptoms and/or radiographic abnormalities of FLD of more than 6 months were found more frequently in SM-FLD than in NS-FLD (66.7 vs 19.4%, p<0.005). And also SM-FLD had more recurrences of FLD than NS-FLD after the initial diagnosis of FLD (1.58±1.56 vs 0.471±1.07, p<0.05). SM-FLD tended to have lower %VC than NS-FLD (73.6±7.4 vs 88.5±3.9%, respectively, p=0.06). Regarding the prognosis, the 10-year survival rates were 70.7% in SM-FLD, and 91.5% in NS-FLD (p<0.05). These results suggest that smoking may make FLD insidious and chronic, and deteriorates the clinical outcome.(Internal Medicine 34: 966-971, 1995)