26
|
Koide M, Matsuo A, Fukui K, Fujimoto T, Shimoo S, Takamatsu K, Kyodo A, Irie D, Tsubakimoto Y, Isodono K, Sakatani T, Inoue K, Fujita H. P3353Cholesterol crystal depth in coronary atherosclerotic plaques: a novel index of plaque vulnerability using optical frequency domain imaging. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
27
|
Fukui K, Nakamura S, Nakanishi A, Okihiro S, Takatsu H. CALCIUM INFLUX ACCELERATES NEURITE DEGENERATION VIA MITOCHONDRIAL-DEPENDENT OXIDATION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
28
|
Takahashi E, Kaneuji A, Tsuda R, Numata Y, Ichiseki T, Fukui K, Kawahara N. The influence of cement thickness on stem subsidence and cement creep in a collarless polished tapered stem: When are thick cement mantles detrimental? Bone Joint Res 2017; 6:351-357. [PMID: 28566327 PMCID: PMC5457643 DOI: 10.1302/2046-3758.65.bjr-2017-0028.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 03/14/2017] [Indexed: 12/30/2022] Open
Abstract
Objectives Favourable results for collarless polished tapered stems have been reported, and cement creep due to taper slip may be a contributing factor. However, the ideal cement thickness around polished stems remains unknown. We investigated the influence of cement thickness on stem subsidence and cement creep. Methods We cemented six collarless polished tapered (CPT) stems (two stems each of small, medium and large sizes) into composite femurs that had been reamed with a large CPT rasp to achieve various thicknesses of the cement mantle. Two or three tantalum balls were implanted in the proximal cement in each femur. A cyclic loading test was then performed for each stem. The migration of the balls was measured three-dimensionally, using a micro-computed tomography (CT) scanner, before and after loading. A digital displacement gauge was positioned at the stem shoulder, and stem subsidence was measured continuously by the gauge. Final stem subsidence was measured at the balls at the end of each stem. Results A strong positive correlation was observed between mean cement thickness and stem subsidence in the CT slices on the balls. In the small stems, the balls moved downward to almost the same extent as the stem. There was a significant negative correlation between cement thickness and the horizontal:downward ratio of ball movement. Conclusion Collarless polished tapered stems with thicker cement mantles resulted in greater subsidence of both stem and cement. This suggests that excessive thickness of the cement mantle may interfere with effective radial cement creep. Cite this article: E. Takahashi, A. Kaneuji, R. Tsuda, Y. Numata, T. Ichiseki, K. Fukui, N. Kawahara. The influence of cement thickness on stem subsidence and cement creep in a collarless polished tapered stem: When are thick cement mantles detrimental? Bone Joint Res 2017;6:–357. DOI: 10.1302/2046-3758.65.BJR-2017-0028.R1.
Collapse
|
29
|
Hattori K, Fukui K, Suzuki N, Ito K. Posteromedial papillary muscle rupture due to squeezing of the left anterior descending coronary artery. Interact Cardiovasc Thorac Surg 2017; 24:636-638. [PMID: 28073988 DOI: 10.1093/icvts/ivw403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Accepted: 11/10/2016] [Indexed: 11/14/2022] Open
Abstract
An unusual case of posteromedial papillary muscle (PPM) rupture due to isolated left anterior descending (LAD) artery ischaemia, associated with severe myocardial bridge contraction, is presented. The unusual blood supply to the PPM was associated with its apical origin and apex-forming LAD.
Collapse
|
30
|
Kobayashi S, Tomokuni A, Gotoh K, Takahashi H, Akita H, Marubashi S, Yamada T, Teshima T, Fukui K, Fujiwara Y, Sakon M. A retrospective analysis of the clinical effects of neoadjuvant combination therapy with full-dose gemcitabine and radiation therapy in patients with biliary tract cancer. Eur J Surg Oncol 2017; 43:763-771. [DOI: 10.1016/j.ejso.2016.12.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/06/2016] [Accepted: 12/16/2016] [Indexed: 12/27/2022] Open
|
31
|
Arizaga MV, Yamamoto SI, Tanaka D, Fukui K, Nohara N, Nishikawa T, Watanabe K, Niino T. Cryopreservation of in vitro Shoot Tips of Ulluco (Ullucus tuberosus Cal.) Using D Cryo-Plate Method. CRYO LETTERS 2017; 38:419-427. [PMID: 29734437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
UNLABELLED BACKGROUND: Maintenance of in vitro collections of ulluco (Ullucus tuberosus Cal.) is cumbersome and costly in an ex-situ genebank. An alternative method for long term preservation which is safe and cost-effective is required. OBJECTIVE To apply a novel cryopreservation procedure using the cryo-plate system to improve the long-term conservation of ulluco. MATERIALS AND METHODS Initially V and D cryo-plate methods were tested, subsequently the D cryo-plate method was selected for ulluco cryopreservation. The D cryo-plate procedures were optimized for post-LN regrowth procedures including cold-hardening, sucrose addition in alginate gel, and duration of LS treatment. Optimized procedures were tested with 11 ulluco lines. RESULTS Shoot tips were isolated from cold-hardened shoots for 3-4 weeks at 5 degree C were excised to 1.0-1.5 mm long and 0.5 mm wide and precultured for 16h at 25 degree C on MS with 0.3 M sucrose. The shoot tips were attached on the cryo-plates by alginate gel with 0.4M sucrose. The cryo-plates with attached shoot tips were treated with 2.0 M glycerol and 1.0 M sucrose solution for 90 min at 25 degree C and dehydrated on filter paper in a Petri dish by air current flow at 25 degree C for 45 min before direct immersion in LN. This optimized procedure was applied to shoot tips of 11 ulluco lines, resulting regrowth ranging from 73 % to 97 %, with an average of 90 % post-LN regrowth. CONCLUSION D cryo-plate is a practical and simple procedure for cryo-storage of in vitro grown ulluco shoot tips in an ex situ genebank.
Collapse
|
32
|
Ichimura K, Fukumoto M, Islam MM, Islam MS, Shimizu K, Fukui K, Ohuchi M, Nojiri K, Terakado A, Yoshikawa M, Ezumi N, Sakamoto M, Nakashima Y. Measurement of neutral gas pressure in the D-module of GAMMA 10/PDX by using ASDEX type fast ionization gauge. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:11D424. [PMID: 27910550 DOI: 10.1063/1.4960536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the divertor simulation experiments in the GAMMA 10/PDX tandem mirror, pressure of the neutral gas was investigated by using a fast ionization gauge. The gauge was absolutely calibrated for hydrogen gas by using a capacitance manometer. Change of the gauge sensitivity due to the magnetic field of GAMMA 10/PDX was also evaluated. The typical gas pressure measured in detached plasma experiments was 0.1-10 Pa. The degree of plasma detachment determined from the reduction of heat flux was enhanced as the gas pressure increases. Rapid increase of the gas pressure under the plasma flow was also observed.
Collapse
|
33
|
Tsuchigame T, Ogata Y, Sumi M, Fukui K, Saito R, Nakashima K, Urata J, Arakawa A, Saito Y, Takahashi M. Differential Diagnosis of Gastric Adenoma and Type IIA Early Gastric Cancer. Acta Radiol 2016. [DOI: 10.1177/028418519103200110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The endoscopic and radiographic findings of 45 gastric adenomas in 39 patients were followed for 6 months to 13 years and compared with type IIa early gastric cancer observed in 9 patients. Difficulties in the differential diagnosis of these disorders were evaluated. The following features were suggestive of gastric adenomas: clustered lesions; protuberance with gentle slope; smooth surface; and relatively young patients. Discrimination of adenoma from type IIa early gastric cancer is often difficult by visual observation alone; biopsy was essential in most patients. A group III adenoma verified on biopsy should be followed closely because the lesion may harbor a cancer (so-called carcinoma-in-adenoma) or a cancer may later develop.
Collapse
|
34
|
Fukui K, Trindade CAC, Briggs KK, Philippon MJ. Arthroscopy of the hip for patients with mild to moderate developmental dysplasia of the hip and femoroacetabular impingement. Bone Joint J 2015; 97-B:1316-21. [DOI: 10.1302/0301-620x.97b10.35303] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The purpose of this study was to determine patient-reported outcomes of patients with mild to moderate developmental dysplasia of the hip (DDH) and femoroacetabular impingement (FAI) undergoing arthroscopy of the hip in the treatment of chondrolabral pathology. A total of 28 patients with a centre-edge angle between 15° and 19° were identified from an institutional database. Their mean age was 34 years (18 to 53), with 12 female and 16 male patients. All underwent labral treatment and concomitant correction of FAI. There were nine reoperations, with two patients requiring revision arthroscopy, two requiring periacetabular osteotomy and five needing total hip arthroplasty. Patients who required further major surgery were more likely to be older, male, and to have more severe DDH with a larger alpha angle and decreased joint space. At a mean follow-up of 42 months (24 to 89), the mean modified Harris hip score improved from 59 (20 to 98) to 82 (45 to 100; p < 0.001). The mean Western Ontario and McMaster Universities Osteoarthritis Index score improved from 30 (1 to 61) to 16 (0 to 43; p < 0.001). Median patient satisfaction was 9.0/10 (1 to 10). Patients reported excellent improvement in function following arthroscopy of the hip. This study shows that with proper patient selection, arthroscopy of the hip can be successful in the young patient with mild to moderate DDH and FAI. Cite this article: Bone Joint J 2015;97-B:1316–21.
Collapse
|
35
|
Saito Y, Fukuda I, Fukui K, Minakawa M, Daitoku K, Suzuki Y. Hybrid operation for combined aortic arch aneurysm and aortic root dilation in a Jehovah's witness patient. Ann Vasc Surg 2014; 28:1797.e11-4. [PMID: 24859166 DOI: 10.1016/j.avsg.2014.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 04/15/2014] [Accepted: 04/17/2014] [Indexed: 11/30/2022]
Abstract
Aortic surgery for Jehovah's Witness patients with extended aneurysms is challenging. The present report describes a case of a 65-year-old male Jehovah's Witness with aortic aneurysm that extended from the ascending to the transverse aortic arch. Two-stage hybrid operation was performed as follows: ascending aortic replacement with debranching of brachiocephalic artery, followed by extra-anatomic bypass of cervical arteries, and thoracic aortic stent-grafting. The patient fully recovered without complication, and the lowest hemoglobin concentration during the hospital admission was 9.5 g/dL. We conclude that the hybrid procedure was effective in securing a margin of safety for bloodless aortic surgery.
Collapse
|
36
|
Fukui K, Masuda A, Hosono A, Suwabe R, Yamashita K, Shinkai T, Urano S. Changes in microtubule-related proteins and autophagy in long-term vitamin E-deficient mice. Free Radic Res 2014; 48:649-58. [PMID: 24568262 DOI: 10.3109/10715762.2014.898295] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Vitamin E deficiency induces neuronal dysfunction and while oxidative stress is likely to be involved in mediating this process, the detailed mechanisms remain to be elucidated. Previously, we found axonal degeneration in the hippocampal CA1 region in vitamin E-deficient mice of 6 months of age (long-term). However, 3 month-old (short-term) vitamin E-deficient mice did not exhibit axonal degeneration in same region. In order to characterize the mechanisms involved in axonal degeneration in long-term vitamin E-deficient mice, we examined changes in microtubule-related proteins. Long-term vitamin E-deficiency led to significantly increased expression of the phosphorylated form of collapsin response mediator protein (CRMP)-2 compared to short-term deficiency. It is well known that CRMP-2 plays a crucial role in the maintenance of neurite function. Similarly, long-term vitamin E-deficiency significantly decreased the expression of silent mating type information regulation (SIRT)-2 mRNA compared to short-term deficiency. SIRT-2 belongs to a family of class III histone deacetylases (HDACs) and functions in the deacetylation of tubulins. Furthermore, the expression of microtubule-associated protein light chain (MAP-LC)3-2, which is a key autophagy protein was significantly higher in the short-term vitamin E-deficiency than the long-term deficiency. These results indicate that the mechanisms of axonal injury in long-term vitamin E-deficient mice are related to dysfunction in microtubules assembly via alterations in microtubule-related proteins and autophagy.
Collapse
|
37
|
Saito Y, Fukuda I, Fukui K, Minakawa M, Suzuki Y. Simultaneous repair of multiple aortic aneurysms: be courageous in minimally invasive era. Ann Thorac Surg 2014; 97:1051-3. [PMID: 24580920 DOI: 10.1016/j.athoracsur.2013.06.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 05/15/2013] [Accepted: 06/20/2013] [Indexed: 11/17/2022]
Abstract
The simultaneous treatment of multiple ruptured aortic aneurysms is a surgical challenge. Here we present a case of a 53-year-old woman with Marfan syndrome who had annuloaortic ectasia of 4.2 cm and a thoracoabdominal aortic aneurysm of 6 cm. The patient developed acute aortic dissection complicated with cardiac tamponade and thoracoabdominal aortic rupture. An emergency operation, which included a Bentall operation, total arch replacement, and thoracoabdominal repair, was performed for 2 remote aneurysms. By paying particular attention to organ perfusion, a single-stage operation was successfully performed and the patient fully recovered.
Collapse
|
38
|
Nishida S, Fukui K, Morita Y. Cover Picture: Hydrogen-Bonding Effect on Spin-Center Transfer of Tetrathiafulvalene-Linked 6-Oxophenalenoxyl Evaluated Using Temperature-Dependent Cyclic Voltammetry and Theoretical Calculations (Chem. Asian J. 2/2014). Chem Asian J 2014. [DOI: 10.1002/asia.201490000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
39
|
Tsuji T, Ishiguro Y, Nakui Y, Murata Y, Munakata A, Onozuka N, Fukui K, Suzuki S, Yamagishi S. A case of dissecting aortic aneurysm with cystic medial necrosis in systemic lupus erythematosus. Mod Rheumatol 2014; 11:238-41. [DOI: 10.3109/s101650170011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
40
|
Fukuda W, Daitoku K, Minakawa M, Fukui K, Suzuki Y, Fukuda I. Management of Infective Endocarditis with Cerebral Complications. Ann Thorac Cardiovasc Surg 2014; 20:229-36. [DOI: 10.5761/atcs.oa.13.02265] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
41
|
Saito Y, Taniguchi S, Watanabe K, Fukui K, Fukuda I. Bilateral axillary arterial aneurysms in siblings with Marfan syndrome. Ann Vasc Surg 2014; 28:740.e13-6. [PMID: 24378247 DOI: 10.1016/j.avsg.2013.06.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Revised: 05/15/2013] [Accepted: 06/04/2013] [Indexed: 10/25/2022]
Abstract
Axillary arterial aneurysm associated with Marfan syndrome is an extremely rare and dangerous disease because of its potential risk for rupture and impairment of neurologic function in the upper extremities. Treatment of large axillary aneurysms can be surgically challenging because the axillary artery is anatomically located under the clavicle bones and the brachial plexus runs dorsal to the aneurysm. We report 2 cases of bilateral axillary arterial aneurysms in brothers with Marfan syndrome. Revival of a novel approach and cautious attempts during the procedures are described in both cases.
Collapse
|
42
|
Nishida S, Fukui K, Morita Y. Hydrogen-Bonding Effect on Spin-Center Transfer of Tetrathiafulvalene-Linked 6-Oxophenalenoxyl Evaluated Using Temperature-Dependent Cyclic Voltammetry and Theoretical Calculations. Chem Asian J 2013; 9:500-5. [DOI: 10.1002/asia.201301188] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Indexed: 01/16/2023]
|
43
|
Niino T, Yamamoto SI, Fukui K, Castillo Martinez CR, Arizaga MV, Matsumoto T, Engelmann F. Dehydration improves cryopreservation of mat rush (Juncus decipiens Nakai) basal stem buds on cryo-plates. CRYO LETTERS 2013; 34:549-560. [PMID: 24441366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Two cryopreservation procedures using aluminium cryo-plates, termed V-Cryo-plate and D-Cryo-plate, were successfully developed for in vitro mat rush (Juncus decipiens Nakai) basal stem buds. Multiple stems induced in liquid MS medium containing 8.9 μM BA by roller culture were cut into small clumps, plated on solid MS medium and cultured for 1 week at 25 degree C. Clumps that had produced many buds were cold-hardened at 5 degree C for 1-2 months. The buds with basal stems were dissected from small clumps and precultured overnight at 25 degree C on solid MS medium containing 0.3 M sucrose. Precultured buds were placed on aluminium cryo-plates and embedded in calcium alginate gel. Osmoprotection was performed by immersing the cryo-plates for 30 min at 25 degree C in loading solution (2 M glycerol + 1.0 M sucrose). In the D-Cryo-plate procedure, the buds were dehydrated to 27-25% moisture content (fresh weight) by placing the cryo-plates in the air current of a laminar flow cabinet for 2 to 3 h. In the V-Cryo-plate procedure, buds were dehydrated by immersing the cryo-plates in PVS2 vitrification solution for 40 min at 25 degree C. In both procedures, cooling was performed by placing the cryo-plates in uncapped cryotubes, which were immersed in liquid nitrogen. For rewarming, cryo-plates were immersed in medium with 1.0 M sucrose for 20 min at room temperature. Regrowth of cryopreserved buds of line 'Kitakei 2' using D-Cryo-plate and V-Cryo-plate procedures, was 90% and 80%, respectively. The two procedures were applied to 20 additional mat rush lines. Using the V-Cryo-plate procedure resulted in regrowth ranging between 13.3 and 86.7%, with an average of 52.5%. The D-Cryo-plate led to regrowth ranging between 73.3 and 96.7%, with an average of 86.3%. The D-Cryo-plate procedure will facilitate cryostorage of mat rush germplasm.
Collapse
|
44
|
Daitoku K, Minakawa M, Suzuki Y, Fukui K, Fukuda I. Eradication of active infective endocarditis with submitral abscess infiltrating to annular calcification. THE JOURNAL OF HEART VALVE DISEASE 2013; 22:859-861. [PMID: 24597410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The case is reported of a 72-year-old man in whom surgery was performed to treat infective endocarditis in association with mitral leaflet vegetation, a submitral abscess that penetrated the pericardial cavity, and posterior mitral annular calcification. Extensive debridement of the posterior left ventricle and atrium, posterior mitral annulus and mitral annular calcification was performed, after which the atrioventricular wall was reconstructed using a theta-shaped patch and a biological mitral valve replaced.
Collapse
|
45
|
Fukuda W, Daitoku K, Minakawa M, Fukui K, Suzuki Y, Fukuda I. Management of infective endocarditis with cerebral complications. J Cardiothorac Surg 2013. [PMCID: PMC3845388 DOI: 10.1186/1749-8090-8-s1-o99] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
46
|
Nishida S, Kawai J, Moriguchi M, Ohba T, Haneda N, Fukui K, Fuyuhiro A, Shiomi D, Sato K, Takui T, Nakasuji K, Morita Y. Control of Exchange Interactions in π Dimers of 6-Oxophenalenoxyl Neutral π Radicals: Spin-Density Distributions and Multicentered-Two-Electron Bonding Governed by Topological Symmetry and Substitution at the 8-Position. Chemistry 2013; 19:11904-15. [PMID: 23922181 DOI: 10.1002/chem.201301783] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Indexed: 12/14/2022]
Abstract
The tri-tert-butylphenalenyl (TBPLY) radical exists as a π dimer in the crystal form with perfect overlapping of the singly occupied molecular orbitals (SOMOs) causing strong antiferromagnetic exchange interactions. 2,5-Di-tert-butyl-6-oxophenalenoxyl (6OPO) is a phenalenyl-based air-stable neutral π radical with extensive spin delocalization and is a counter analogue of phenalenyl in terms of the topological symmetry of the spin density distribution. X-ray crystal structure analyses showed that 8-tert-butyl- and 8-(p-XC6H4)-6OPOs (X=I, Br) also form π dimers in the crystalline state. The π-dimeric structure of 8-tert-butyl-6OPO is seemingly similar to that of TBPLY even though its SOMO-SOMO overlap is small compared with that of TBPLY. The 8-(p-XC6H4) derivatives form slipped stacking π dimers in which the SOMO-SOMO overlaps are greater than in 8-tert-butyl-6OPO, but still smaller than in TBPLY. The solid-state electronic spectra of the 6OPO derivatives show much weaker intradimer charge-transfer bands, and SQUID measurements for 8-(p-BrC6H4)-6OPO show a weak antiferromagnetic exchange interaction in the π dimer. These results demonstrate that the control of the spin distribution patterns of the phenalenyl skeleton switches the mode of exchange interaction within the phenalenyl-based π dimer. The formation of the relevant multicenter-two-electron bonds is discussed.
Collapse
|
47
|
Ibuki M, Fukui K, Yamauchi K. Effect of dietary mannanase-hydrolysed copra meal on growth performance and intestinal histology in broiler chickens. J Anim Physiol Anim Nutr (Berl) 2013; 98:636-42. [PMID: 23859084 DOI: 10.1111/jpn.12105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Accepted: 06/13/2013] [Indexed: 11/30/2022]
Abstract
We investigated mannanase-hydrolysed copra meal (MCM), which contains β-1,4-mannobiose (MNB), for its capacity to improve growth performance and activate intestinal villus function. Seven-day-old chicks were separated into four flocks with an equal mean body weight and then fed a basal diet (control) or a diet supplemented with 0.02% or 0.1% MCM. After 7 weeks, the feed intake and body weight were determined and then used to calculate the feed efficiency (FE). Moreover, the intestinal segments were examined by light microscopy and scanning electron microscopy (SEM) for cellular and morphological changes in the villus. Although feed intake was not significantly different among the experimental groups, the body weight gain and FE were significantly higher in the 0.1% MCM group than in the control group (p < 0.05), while feed intake tended to be higher in the 0.02% and 0.1% MCM groups. The cellular area of the ileum was significantly higher in the 0.02% and 0.1% groups in relation to that in the control group (p < 0.05). Furthermore, the cellular area of the duodenum and the jejunum tended to be higher in the 0.02% and 0.1% MCM groups. For the correlation analysis, a significant correlation was observed between the dosage of MCM and the cell area of the duodenum, jejunum and ileum. Moreover, the number of mitotic cells was higher in the 0.1% MCM group. As shown by SEM, the cells at the villi tips were protuberant in appearance in the 0.02% and 0.1% MCM treatments when compared with the relatively flat cells of the control. On the duodenal villus surface of the 0.1% MCM group, some cells devoid of microvilli were observed, suggesting that the increased protuberance of these cells represents increased absorption activity. Although intestinal villus height and area did not significantly differ among groups, the levels of these parameters tended to increase in the experimental groups relative to the control. The present morphological findings reveal that MNB might be effective for activating intestinal absorptive function, and that the functional activation promotes the growth of the chickens.
Collapse
|
48
|
Ueda A, Suzuki S, Yoshida K, Fukui K, Sato K, Takui T, Nakasuji K, Morita Y. Hexamethoxyphenalenyl as a Possible Quantum Spin Simulator: An Electronically Stabilized Neutral π Radical with Novel Quantum Coherence Owing to Extremely High Nuclear Spin Degeneracy. Angew Chem Int Ed Engl 2013; 52:4795-9. [DOI: 10.1002/anie.201301435] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Indexed: 12/14/2022]
|
49
|
Equilibrina I, Matsunaga S, Morimoto A, Hashimoto T, Uchiyama S, Fukui K. ASURA (PHB2) interacts with Scc1 through chromatin. Cytogenet Genome Res 2013; 139:225-33. [PMID: 23548868 DOI: 10.1159/000350004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2012] [Indexed: 11/19/2022] Open
Abstract
Sister chromatid cohesion mediated by the cohesin complex is essential for faithful chromosome segregation. Previously we reported that PHB2 (prohibitin2/ASURA), a multifunctional protein, has a role in sister chromatid cohesion. Nevertheless, how ASURA is involved in sister chromatid cohesion still remains unclear. The present co-immunoprecipitation analysis reveals that ASURA interacts with cohesin subunit Scc1 in vivo. We show that ASURA associates with chromatin in a similar manner as Scc1 throughout the cell cycle. Furthermore, our observation using the Fucci (fluorescent ubiquitination-based cell cycle indicator) system indicates that ASURA is important for cohesin maintenance at early mitosis. We have also identified that the conserved PHB domain is responsible for chromatin targeting of ASURA. Our results suggest that the regulation of sister chromatid cohesion is mediated by ASURA binding to chromatin, where ASURA might be involved in cohesin protection through ASURA-Scc1 interactions.
Collapse
|
50
|
Lim YK, Fukui K. Satellite observations of low-energy primary cosmic ray nuclei of chargesZ≥ 6. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jz070i019p04965] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|