著者

Yasuhiro ITO Hiroshi YOSHIDA Rie MARUO Shinji MORITA Toru TAKANO Mitsuyoshi HIROKAWA Tomonori YABUTA Mitsuhiro FUKUSHIMA Hiroyuki INOUE Chisato TOMODA Minoru KIHARA Takashi URUNO Takuya HIGASHIYAMA Yuuki TAKAMURA Akihiro MIYA Kaoru KOBAYASHI Fumio MATSUZUKA Akira MIYAUCHI

出版者

(社)日本内分泌学会

雑誌

Endocrine Journal (ISSN:09188959)

巻号頁・発行日

vol.56, no.1, pp.89-97, 2009 (Released:2009-03-12)

参考文献数

49

被引用文献数

92 173

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Recent studies have demonstrated that BRAFV600E mutation is a common event in papillary thyroid carcinoma and a majority of these lesions have shown a direct relationship between BRAFV600E mutation and aggressive characteristics, including a worse patient prognosis. However, there are no studies from Japan regarding this issue in a large series with adequate postoperative follow-up periods. We investigated BRAFV600E mutation in 631 patients with papillary carcinoma having median follow-up periods of 83 months. The prevalence of BRAFV600E mutation was 38.4%, and the rate was higher in carcinoma larger than 1.0 cm but did not successively increase with tumor size. Furthermore, the prevalence did not significantly increase in cases demonstrating high-risk biological features such as clinically apparent lymph node metastasis, massive extrathyroid extension, advanced age, distant metastasis at surgery, and advanced Stage. The disease-free survival of patients with BRAFV600E mutation did not differ from that of those without BRAFV600E mutation. These findings indicate that, although BRAFV600E mutation may play some roles in local carcinoma development, there is no evidence that BRAFV600E mutation significantly reflects the aggressive characteristics and poor prognosis of patients with papillary carcinoma in Japan.

著者

Yasuhiro ITO Mitsuhiro FUKUSHIMA Chisato TOMODA Hiroyuki INOUE Minoru KIHARA Takuya HIGASHIYAMA Takashi URUNO Yuuki TAKAMURA Akihiro MIYA Kaoru KOBAYASHI Fumio MATSUZUKA Akira MIYAUCHI

出版者

The Japan Endocrine Society

雑誌

Endocrine Journal (ISSN:09188959)

巻号頁・発行日

pp.0905250282, (Released:2009-06-09)

被引用文献数

107 106

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Lymph node metastasis is an important clinicopathological feature of papillary thyroid carcinoma (PTC). PTC having clinically apparent lateral node metastasis detectable on preoperative imaging studies (N1b) is known to show a dire prognosis. However, N1b cases include various levels of biological aggressiveness, depending on the size, number, laterality and invasiveness of metastatic nodes. We investigated differences in the prognoses of 621 N1b patients based on these features and compared their prognoses with those of 4297 patients without clinically apparent metastasis (N0) and 125 patients with clinically apparent central node metastasis only (N1a). Disease-free survival (DFS) and cause-specific survival (CSS) of N1b or N1a patients were significantly worse than those of N0 patients, but the prognosis of N1b patients did not differ from that of N1a patients. In the subset of N1b patients, metastatic nodes larger than 3cm, extranodal extension, or 5 or more clinically apparent metastatic nodes independently affected DFS and a combination of the former two features also showed an effect on CSS on multivariate analysis. Prognosis of N1b patients who had none of these features did not differ from that of N1a patients. It is therefore suggested that N1b patients having metastasis larger than 3cm, those showing extranodal extension, and those having 5 or more clinically apparent metastasis should regarded as high-risk, and that careful surgical treatment and postoperative follow-up are necessary.

著者

Masato Okada Koichi Inoue Koji Tanaka Yuichi Ninomiya Yuko Hirao Takafumi Oka Nobuaki Tanaka Hiroyuki Inoue Ryo Nakamaru Yasushi Koyama Atsunori Okamura Katsuomi Iwakura Yasushi Sakata Kenshi Fujii

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.82, no.4, pp.956-964, 2018-03-23 (Released:2018-03-23)

参考文献数

14

被引用文献数

14 17

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Background:This study evaluated the safety and efficacy of venous figure-of-eight (FoE) suture to achieve femoral venous hemostasis after radiofrequency (RF) catheter ablation (CA) for atrial fibrillation (AF).Methods and Results:We retrospectively examined 517 consecutive patients undergoing RFCA for AF. The control group (n=247) underwent manual compression for femoral venous hemostasis after sheath removal with 6 h of bed rest. The FoE group (n=270) underwent FoE suture technique with 4 h of bed rest. All patients achieved successful hemostasis within 24 h after CA. Although the incidence of hematoma was similar between the groups, the incidence of rebleeding was lower in the FoE group than in the control group (FoE vs. control, 3.7% vs. 18.6%, P<0.001). The post-procedural use of analgesic and/or anti-emetic agents was less frequent in the FoE group (19.3% vs. 32.0%, P<0.001). On multiple logistic regression analysis after adjustment for age and sex, the use of a vitamin K antagonist (OR, 2.42; 95% CI: 1.18–4.99, P=0.02) and the FoE suture technique (OR, 0.17; 95% CI: 0.08–0.35, P<0.001) were independent predictors of rebleeding after CA.Conclusions:FoE suture technique effectively achieved femoral venous hemostasis after RFCA for AF. It reduced the risk of rebleeding, shortened bed rest duration, and relieved patient discomfort.

著者

Nobuaki Tanaka Koji Tanaka Yuichi Ninomiya Yuko Hirao Takafumi Oka Masato Okada Hiroyuki Inoue Ryo Nakamaru Kohtaro Takayasu Ryo Kitagaki Yasushi Koyama Atsunori Okamura Katsuomi Iwakura Yasushi Sakata Kenshi Fujii Koichi Inoue

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-18-1035, (Released:2019-02-06)

参考文献数

25

被引用文献数

4

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Background: Automated ablation lesion annotation with optimal settings for parameters including contact force (CF) and catheter stability may be effective for achieving durable pulmonary vein isolation. Methods and Results: We retrospectively examined 131 consecutive patients who underwent initial catheter ablation (CA) for paroxysmal atrial fibrillation (PAF) by automatic annotation system (VISITAG module)-guided radiofrequency CA (RFCA) (n=61) and 2nd-generation cryoballoon ablation (CBA) (n=70) in terms of safety and long-term efficacy. The automatic annotation criteria for the RFCA group were as follows: catheter stability range of motion ≤1.5 mm, duration ≥5 s, and CF ≥5 g. We ablated for >20 s with a force-time integral >150 gs at each site, before moving to the next site. Each interlesion distance was <6 mm. Procedural complications were more frequent in the CBA group (1.6% vs. 10.0%, P=0.034). Across a median follow-up of 2.98 years, 88.5% and 70.0% of patients in the RFCA and CBA groups, respectively, were free from recurrence (log-rank test, P=0.0039). There was also a significant difference in favor of RFCA with respect to repeat ablations (3.3% vs. 24.3%, log-rank test, P=0.0003). Conclusions: RF ablation guided by an automated algorithm that includes CF and catheter stability parameters showed better long-term outcomes than CBA in the treatment of patients with PAF without increasing complications.

著者

Masato Okada Koji Tanaka Yasuharu Matsunaga-Lee Yuichi Ninomiya Yuko Hirao Takafumi Oka Nobuaki Tanaka Hiroyuki Inoue Katsuomi Iwakura Kenshi Fujii Koichi Inoue

出版者

International Heart Journal Association

雑誌

International Heart Journal (ISSN:13492365)

巻号頁・発行日

vol.60, no.3, pp.761-767, 2019-05-30 (Released:2019-05-30)

参考文献数

16

被引用文献数

1 2

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A 70-year-old woman was admitted for treatment of supraventricular tachycardia. Ventriculoatrial conduction was revealed through programmed ventricular stimulation; the coronary sinus ostium (CSos) was the earliest atrial activation site. The fast-slow forms of atrioventricular nodal reentrant tachycardia (AVNRT) were induced by ventricular extra-stimuli. During tachycardia, the earliest atrial activation site was located at the bottom of CSos. Radiofrequency (RF) energy application to this site resulted in the delay of local electrical potential, prolongation of tachycardia cycle length, and a shift of the earliest retrograde activation site to the roof of CSos. Subsequent ablation induced a similar shift to the inferior tricuspid annulus and to the right posterior septum. Finally, RF energy application to the right posterior septum resulted in the termination of tachycardia, which was not induced afterward. Multiple shifts in the earliest retrograde atrial activation site along the tricuspid annulus after each slow pathway ablation suggested that annular tissue plays a substantial role as a substrate for AVNRT.

著者

Nobuaki Tanaka Koichi Inoue Koji Tanaka Yuko Toyoshima Takafumi Oka Masato Okada Hiroyuki Inoue Ryo Nakamaru Yasushi Koyama Atsunori Okamura Katsuomi Iwakura Yasushi Sakata Kenshi Fujii

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.81, no.11, pp.1596-1602, 2017-10-25 (Released:2017-10-25)

参考文献数

21

被引用文献数

2 24

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Background:Durable pulmonary vein isolation (PVI) is critical in reducing recurrence after radiofrequency catheter ablation for atrial fibrillation (AF). The VISITAG Module, an automatic annotation system that takes account of catheter stability and contact force (CF), might be useful in accomplishing this.Methods and Results:In 49 patients undergoing VISITAG-guided AF ablation (group A), we set the following automatic annotation criteria: catheter stability range of motion ≤1.5 mm, duration ≥5 s, CF ≥5 g, time ≥25% and tag diameter at 6 mm. We used ablation >20 s and force-time integral >150 gs at each site, then moved to the next site where a new tag appeared that overlapped with the former tag. Results and outcome were retrospectively compared for 42 consecutive patients undergoing CF-guided AF ablation without this algorithm (group B). Successful PVI at completion of the initial anatomical line was more frequent in group A than B (66.3% vs. 36.9%, P=0.0006) while spontaneous PV reconnection was less frequent (14.2% vs. 30.9%, P=0.0014) and procedure time was shorter (138±35 min vs. 180±44 min, P<0.001). One-year success rate off anti-arrhythmic drugs was higher in group A (91.8% vs. 69.1%, log rank P=0.0058).Conclusions:An automated annotation algorithm with an optimal setting reduced acute resumption of left atrium-PV conduction, shortened procedure time, and improved AF ablation outcome.

著者

Yasuhiro ITO Takuya HIGASHIYAMA Mitsuyoshi HIROKAWA Mitsuhiro FUKUSHIMA Hiroyuki INOUE Tomonori YABUTA Chisato TOMODA Takashi URUNO Minoru KIHARA Yuuki TAKAMURA Akihiro MIYA Kaoru KOBAYASHI Fumio MATSUZUKA Akira MIYAUCHI

出版者

The Japan Endocrine Society

雑誌

Endocrine Journal (ISSN:09188959)

巻号頁・発行日

vol.55, no.6, pp.985-989, 2008 (Released:2008-12-27)

参考文献数

17

被引用文献数

4 20

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Anaplastic carcinoma arises from differentiated carcinoma and generally shows a dire prognosis. Anaplastic transformation may occur not only in primary tumors but also in metastatic lymph nodes. We encountered 5 cases of papillary carcinoma showing anaplastic transformation in lymph nodes that were curatively resected. Patient ages ranged from 67 to 85 years. Two of these patients showed anaplastic transformation at the initial surgery and the remaining 3 showed anaplastic transformation after repeated recurrence to the lymph nodes. After resection of anaplastic lesions of the nodes, 2 patients underwent radiation therapy, whereas the remaining 3 did not receive any adjuvant therapy. One patient died of rapid growth of lung metastasis 5 months after the resection. One patient died of carcinoma 63 months after surgery. Two patients have survived to date, 6 and 85 months after resection, respectively. The remaining one patient died of heart failure 11 months after surgery. It is therefore suggested that long-term survival can be expected for patients with differentiated carcinoma showing anaplastic transformation in the lymph node if the lesions can be curatively resected.

著者

Masanori Tamaki Kazutoshi Miyashita Aika Hagiwara Shu Wakino Hiroyuki Inoue Kentaro Fujii Chikako Fujii Sho Endo Asuka Uto Masanori Mitsuishi Masaaki Sato Toshio Doi Hiroshi Itoh

出版者

(社)日本内分泌学会

雑誌

Endocrine Journal (ISSN:09188959)

巻号頁・発行日

vol.64, no.Suppl., pp.S47-S51, 2017 (Released:2017-06-24)

参考文献数

14

被引用文献数

24

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Chronic kidney disease (CKD) impairs physical performance in humans, which leads to a risk of all-cause mortality. In our previous study, we demonstrated that a reduction in muscle mitochondria rather than muscle mass was a major cause of physical decline in 5/6 nephrectomized CKD model mice. Because ghrelin administration has been reported to enhance oxygen utilization in skeletal muscle, we examined the usefulness of ghrelin for a recovery of physical decline in 5/6 nephrectomized C57Bl/6 mice, focusing on the epigenetic modification of peroxisome proliferator activated receptor gamma coactivator-1α (PGC-1α), a master regulator of mitochondrial biogenesis. The mice were intraperitoneally administered acylated ghrelin (0.1 nmol/gBW; three times per week) for a month. Muscle strength and exercise endurance were measured by using a dynamometer and treadmill, respectively. Mitochondrial DNA copy number was determined by quantitative PCR. The methylation levels of the cytosine residue at 260 base pairs upstream of the translation initiation point (C-260) of PGC-1α, which has been demonstrated to decrease the expression, was evaluated by methylation-specific PCR and bisulfite genomic sequencing methods after the ghrelin administration. Ghrelin administration improved both muscle strength and exercise endurance in the mice and was associated with an increase in muscle mass and muscle mitochondrial content. Ghrelin administration decreased the methylation ratio of C-260 of PGC-1α in the skeletal muscle and increased the expression. Therefore, ghrelin administration effectively reduced the physical decline in 5/6 nephrectomized mice and was accompanied with an increased mitochondrial content through de-methylation of the promoter region of PGC-1α in the muscle.

著者

Tetsuya GOSHIMA Masaharu TSUJI Hiroyuki INOUE Shinichi YANO Tamotsu HOSHINO Akinori MATSUSHIKA

出版者

(社)日本農芸化学会

雑誌

Bioscience, Biotechnology, and Biochemistry (ISSN:09168451)

巻号頁・発行日

vol.77, no.7, pp.1505-1510, 2013-07-23 (Released:2013-07-23)

参考文献数

20

被引用文献数

59

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The yeast Kluyveromyces marxianus is considered as a potential alternative to Saccharomyces cerevisiae in producing ethanol as a biofuel. In this study, we investigated the ethanol fermentation properties of novel K. marxianus strain DMB1, isolated from bagasse hydrolysates. This strain utilized sorbitol as well as various pentoses and hexoses as single carbon sources under aerobic conditions and produced ethanol from glucose in hydrolysates of the Japanese cedar at 42 °C. Reference strains K. marxianus NBRC1777 and S. cerevisiae BY4743 did not assimilate sorbitol or ferment lignocellulosic hydrolysates to ethanol at this temperature. Thus strain DMB1 appears to be optimal for producing bioethanol at high temperatures, and might provide a valuable means of increasing the efficiency of ethanol fermentation.

著者

Yasuhiro ITO Mitsuhiro FUKUSHIMA Chisato TOMODA Hiroyuki INOUE Minoru KIHARA Takuya HIGASHIYAMA Takashi URUNO Yuuki TAKAMURA Akihiro MIYA Kaoru KOBAYASHI Fumio MATSUZUKA Akira MIYAUCHI

出版者

(社)日本内分泌学会

雑誌

Endocrine Journal (ISSN:09188959)

巻号頁・発行日

vol.56, no.6, pp.759-766, 2009 (Released:2009-09-25)

参考文献数

15

被引用文献数

55 106

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Lymph node metastasis is an important clinicopathological feature of papillary thyroid carcinoma (PTC). PTC having clinically apparent lateral node metastasis detectable on preoperative imaging studies (N1b) is known to show a dire prognosis. However, N1b cases include various levels of biological aggressiveness, depending on the size, number, laterality and invasiveness of metastatic nodes. We investigated differences in the prognoses of 621 N1b patients based on these features and compared their prognoses with those of 4297 patients without clinically apparent metastasis (N0) and 125 patients with clinically apparent central node metastasis only (N1a). Disease-free survival (DFS) and cause-specific survival (CSS) of N1b or N1a patients were significantly worse than those of N0 patients, but the prognosis of N1b patients did not differ from that of N1a patients. In the subset of N1b patients, metastatic nodes larger than 3cm, extranodal extension, or 5 or more clinically apparent metastatic nodes independently affected DFS and a combination of the former two features also showed an effect on CSS on multivariate analysis. Prognosis of N1b patients who had none of these features did not differ from that of N1a patients. It is therefore suggested that N1b patients having metastasis larger than 3cm, those showing extranodal extension, and those having 5 or more clinically apparent metastasis should regarded as high-risk, and that careful surgical treatment and postoperative follow-up are necessary.