著者

Masataka Sato Satoshi Kodera Naoto Setoguchi Kengo Tanabe Shunichi Kushida Junji Kanda Mike Saji Mamoru Nanasato Hisataka Maki Hideo Fujita Nahoko Kato Hiroyuki Watanabe Minami Suzuki Masao Takahashi Naoko Sawada Masao Yamasaki Shinnosuke Sawano Susumu Katsushika Hiroki Shinohara Norifumi Takeda Katsuhito Fujiu Masao Daimon Hiroshi Akazawa Hiroyuki Morita Issei Komuro

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-23-0216, (Released:2023-11-14)

参考文献数

41

被引用文献数

2

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Background: Left heart abnormalities are risk factors for heart failure. However, echocardiography is not always available. Electrocardiograms (ECGs), which are now available from wearable devices, have the potential to detect these abnormalities. Nevertheless, whether a model can detect left heart abnormalities from single Lead I ECG data remains unclear.Methods and Results: We developed Lead I ECG models to detect low ejection fraction (EF), wall motion abnormality, left ventricular hypertrophy (LVH), left ventricular dilatation, and left atrial dilatation. We used a dataset comprising 229,439 paired sets of ECG and echocardiography data from 8 facilities, and validated the model using external verification with data from 2 facilities. The area under the receiver operating characteristic curves of our model was 0.913 for low EF, 0.832 for wall motion abnormality, 0.797 for LVH, 0.838 for left ventricular dilatation, and 0.802 for left atrial dilatation. In interpretation tests with 12 cardiologists, the accuracy of the model was 78.3% for low EF and 68.3% for LVH. Compared with cardiologists who read the 12-lead ECGs, the model’s performance was superior for LVH and similar for low EF.Conclusions: From a multicenter study dataset, we developed models to predict left heart abnormalities using Lead I on the ECG. The Lead I ECG models show superior or equivalent performance to cardiologists using 12-lead ECGs.

著者

Kentaro Shoji Masao Yamasaki Hisato Kunitake

出版者

Japan Oil Chemists' Society

雑誌

Journal of Oleo Science (ISSN:13458957)

巻号頁・発行日

vol.69, no.2, pp.143-151, 2020 (Released:2020-02-05)

参考文献数

48

被引用文献数

3

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Prevention of postprandial hypertriglyceridemia is an important consideration for reducing the risk of developing cardiovascular disease. While blueberry fruits have been reported to ameliorate lipid metabolism in humans, there are only few research reports on the effects of blueberry leaves (BL). Here, we investigated the efficacy of BL on postprandial hyperlipidemia in subjects with high fasting triacylglycerol (TG) concentrations. Randomized, double-blind, cross-over design study was conducted. The subjects consumed a BL containing beverage or a placebo beverage before a fat-enriched test meal. Blood samples were collected prior to and 1, 2, 3, 4, and 5 hours after consuming the test beverage. The postprandial serum TG and remnant-like particle cholesterol (RLP-C) concentrations were significantly lower in the BL beverage compared with those in the placebo beverage. Additionally, BL was more effective in subjects with high fasting ghrelin with gastric emptying function. In current study, fasting ghrelin correlated with the increase in postprandial serum TG, suggesting that BL ameliorates hypertriglyceridemia through delayed gastric emptying. In conclusion, this pilot study suggests that BL may be useful as an early dietary therapy for treating postprandial hyperlipidemia.

著者

Masao Yamasaki Chihiro Motonaga Marino Yokoyama Aya Ikezaki Tomoka Kakihara Rintaro Hayasegawa Kaede Yamasaki Masanobu Sakono Yoichi Sakakibara Masahito Suiko Kazuo Nishiyama

出版者

公益社団法人 日本油化学会

雑誌

Journal of Oleo Science (ISSN:13458957)

巻号頁・発行日

vol.62, no.11, pp.925-932, 2013 (Released:2013-11-06)

参考文献数

24

被引用文献数

2 14 2

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Various fatty acids are attracting considerable interest for their anticancer effects. Among them, fatty acids containing conjugated double bonds show one of the most potent cytotoxic effects on cancer cells. Here, we focused on the cancer cell killing activity of jacaranda seed oil. The seed oil of jacaranda harvested from Miyazaki in Japan contained 30.9% cis-8, trans-10, cis-12 octadecatrienoic acid, called jacaric acid (JA). Fatty acid prepared from this oil (JFA) and JA strongly induced cell death in human leukemia HL-60 cells. On the other hand, linoleic acid and trans-10, cis-12 conjugated linoleic acid (<10 μM) did not affect cell proliferation and viability. An increase in the sub-G1 population and internucleosomal fragmentation of DNA was observed in JA- and JFA-treated cells, indicating induction of apoptotic cell death. Finally, the cytotoxic effects of JA and JFA were completely abolished by α-tocopherol. Taken together, these data suggest that jacaranda seed oil has potent apoptotic activity in HL-60 cells through induction of oxidative stress.

著者

Kenjirou Ogawa Takara Karitani Wataru Otsu Kazuo Nishiyama Hisato Kunitake Yo Goto Shota Nomiyama Hideaki Hara Masao Yamasaki

出版者

The Pharmaceutical Society of Japan

雑誌

BPB Reports (ISSN:2434432X)

巻号頁・発行日

vol.6, no.3, pp.87-97, 2023 (Released:2023-05-26)

参考文献数

29

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Background: Blue light causes retinal photoreceptor damage via oxidative and endoplasmic reticulum (ER) stress. A previous study showed that blueberry stem extract (BStEx) and its active components have cytoprotective effects against blue-light-induced photoreceptor cell damage by suppressing oxidative stress. This study demonstrated the inhibitory effect of BStEx against blue light-induced ER stress in photoreceptor cells. Methods: The photoreceptor cells treated with BStEx or the antioxidant N-Acetyl-L-cysteine (NAC) as a positive control were used and then exposed to blue light. The cytoprotective effects of BStEx and NAC were evaluated using CCK-8. The ER stress-related protein expression changes over time, and its levels were measured after each exposure time to blue light in photoreceptor cells treated with BStEx or NAC. Results: BStEx and NAC showed protective effects against blue-light-induced photoreceptor morphological abnormalities and cell damage. Although blue light triggered ER stress factors such as BiP, PERK, ATF6, eIF2α, ATF4, and CHOP, which in turn stimulated cell cycle arrest factors p53 and p21 and upregulation of apoptosis-inducing factors caspase-3. However, BStEx suppressed the increase in expression of BiP, ATF4, ATF6, CHOP, p53, p21, and caspase-3, but not mitochondrial apoptotic factors Bax and cytochrome c. Furthermore, the antioxidant NAC showed similar suppressive effects on BStEx. Conclusion: Our findings suggest that blue light-induced ER stress is primarily caused by oxidative stress, and BStEx might suppress ER stress via an antioxidant effect. The antioxidant NAC contributes to the cell proliferative capacity and suppression of apoptosis in photoreceptor cells.

著者

Mizuki Miura Masao Yamasaki Yukari Uemura Masatomo Yoshikawa Katsumi Miyauchi Hiroyuki Tanaka Hideki Miyachi Jun Yamashita Makoto Suzuki Takeshi Yamamoto Ken Nagao Issei Komuro Morimasa Takayama

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.80, no.2, pp.461-468, 2016-01-25 (Released:2016-01-25)

参考文献数

22

被引用文献数

14 18

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Background:Previous trials have found that low low-density lipoprotein-cholesterol (LDL-C) on admission was associated with increased mortality in patients with acute myocardial infarction (AMI). There are few reports, however, on the effect of low LDL-C with or without in-hospital statin treatment on short-term prognosis in AMI patients.Methods and Results:A total of 9,032 AMI patients underwent primary PCI in 68 centers in the Tokyo CCU Network Registry during 2009–2012, in whom LDL-C was measured in 6,486. We divided them into 4 groups: statin-treated/LDL-C <100 mg/dl (n=1,236), statin-treated/LDL-C ≥100 mg/dl (n=3,671), statin-naïve/LDL-C <100 mg/dl (n=662), and statin-naïve/LDL-C ≥100 mg/dl (n=917). We assessed hospital mortality within 30 days. In-hospital all-cause mortality was significantly lower in the statin-treated/LDL-C ≥100-mg/dl group (3.2%, P<0.001). On multivariate Cox regression analysis, adjusted for age, gender, hypertension, diabetes mellitus, dyslipidemia and other clinical factors, the combination of statin treatment and LDL-C ≥100 mg/dl was an independent predictor of lower in-hospital mortality (adjusted HR, 0.211; 95% CI: 0.096–0.462; P<0.001). In the LDL-C <100-mg/dl patients, statin treatment also independently reduced in-hospital mortality (adjusted HR, 0.467; 95% CI: 0.223–0.976; P=0.043). Spontaneously low LDL-C was associated with increased short-term mortality.Conclusions:Statin treatment was associated with better short-term outcome in patients with AMI, even in patients with low LDL-C. (Circ J 2016; 80: 461–468)

著者

Kento Fujii Yuma Ota Kazuo Nishiyama Hisato Kunitake Yumi Yamasaki Hiroyuki Tari Kaori Araki Teruaki Arakawa Masao Yamasaki

出版者

Japan Oil Chemists' Society

雑誌

Journal of Oleo Science (ISSN:13458957)

巻号頁・発行日

vol.68, no.5, pp.471-479, 2019 (Released:2019-05-01)

参考文献数

30

被引用文献数

7

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Blueberry leaf is currently a popular dietary supplement. Effects of dietary blueberry leaf and its active components on body fat accumulation were examined. C57BL/6J mice were fed high-fat, high-sucrose diet with or without 3% blueberry leaf extract (BLEx) or 3% concentrated-polyphenolic BLEx (CP BLEx) for 8 weeks. Compared to mice fed a high-fat, high-sucrose diet without blueberry leaf, BLEx and CP BLEx significantly reduced body weight and adipose tissue weight gain. Adipocytes were also smaller and and liver lipid accumulatioin was significantly inhibited in mice fed either BLEx or CP BLEx. These effects tended to be more pronounced in mice fed CP BLEx compared to in mice fed BLEx. Together, results suggest that blueberry leaf inhibits body fat accumulation typically observed in mice fed a high-fat, high-sucrose diet, and that inhibition is attributable to polyphenolic components in leaf extracts.