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Tseng YC, Kato A, Chang JF, Chen WC, Higashihara T, Chueh CC. Impact of the segment ratio on a donor-acceptor all-conjugated block copolymer in single-component organic solar cells. Nanoscale 2022; 14:5472-5481. [PMID: 35322845 DOI: 10.1039/d2nr00437b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The development of single-component organic solar cells (SCOSCs) using only one photoactive component with a chemically bonded D/A structure has attracted increasing research attention in recent years. At represent, most relevant studies focus on comparing the performance difference between a donor-acceptor (D-A) conjugated block copolymer (CBC) and the commensurate blending systems based on the same donor and acceptor segments, and still there are no reports on the impact of the segment ratio for a certain D-A CBC on the resultant photovoltaic performance. In this study, we synthesized a D-A all-conjugated polymers based on an n-type PNDI2T block and a p-type PBDB-T donor block but with three different segment ratios (P1-P3) and demonstrate the significance of the D/A segment ratio on photovoltaic performance. Our results reveal that the n-type PNDI2T block plays a more critical role in the inter/intra-chain charge transfer. P1 with a higher content of PNDI2T delivers superior exciton dissociation and charge transfer behavior than P2 and P3, benefitting from its more balanced hole/electron mobility. In addition, a higher packing regularity associated with a more dominant face-on orientation is also observed for P1. As a result, SCOSC based on P1 exhibits the highest PCE among the synthesized CBCs. It also possesses a minimal energy loss due to the better suppressed non-radiative recombination loss. This work provides the first discussion of the impact of the segment ratio for a D-A all-conjugated block copolymer and signifies the critical role of the n-type segment in designing high-performance single-component CBCs.
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Affiliation(s)
- Yu-Cheng Tseng
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Aoto Kato
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan.
| | - Jia-Fu Chang
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Wen-Chang Chen
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan.
| | - Tomoya Higashihara
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan.
| | - Chu-Chen Chueh
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan.
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2
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Bouquet J, Auberger N, Ashmus R, King D, Bordes A, Fontelle N, Nakagawa S, Madden Z, Proceviat C, Kato A, Désiré J, Vocadlo DJ, Blériot Y. Structural variation of the 3-acetamido-4,5,6-trihydroxyazepane iminosugar through epimerization and C-alkylation leads to low micromolar HexAB and NagZ inhibitors. Org Biomol Chem 2021; 20:619-629. [PMID: 34940771 DOI: 10.1039/d1ob02280f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis of seven-membered iminosugars derived from a 3S-acetamido-4R,5R,6S-trihydroxyazepane scaffold and their evaluation as inhibitors of functionally related exo-N-acetylhexosaminidases including human O-GlcNAcase (OGA), human lysosomal β-hexosaminidase (HexAB), and Escherichia coli NagZ. Capitalizing on the flexibility of azepanes and the active site tolerances of hexosaminidases, we explore the effects of epimerization of stereocenters at C-3, C-5 and C-6 and C-alkylation at the C-2 or C-7 positions. Accordingly, epimerization at C-6 (L-ido) and at C-5 (D-galacto) led to selective HexAB inhibitors whereas introduction of a propyl group at C-7 on the C-3 epimer furnished a potent NagZ inhibitor.
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Affiliation(s)
- J Bouquet
- Université de Poitiers, IC2MP, UMR CNRS 7285, OrgaSynth Team, Glyco group, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
| | - N Auberger
- Université de Poitiers, IC2MP, UMR CNRS 7285, OrgaSynth Team, Glyco group, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
| | - R Ashmus
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5S 1P6, Canada.
| | - D King
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5S 1P6, Canada.
| | - A Bordes
- Université de Poitiers, IC2MP, UMR CNRS 7285, OrgaSynth Team, Glyco group, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
| | - N Fontelle
- Université de Poitiers, IC2MP, UMR CNRS 7285, OrgaSynth Team, Glyco group, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
| | - S Nakagawa
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Z Madden
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5S 1P6, Canada.
| | - C Proceviat
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5S 1P6, Canada.
| | - A Kato
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - J Désiré
- Université de Poitiers, IC2MP, UMR CNRS 7285, OrgaSynth Team, Glyco group, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
| | - D J Vocadlo
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5S 1P6, Canada.
| | - Y Blériot
- Université de Poitiers, IC2MP, UMR CNRS 7285, OrgaSynth Team, Glyco group, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
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Sato S, Sugano N, Shiozawa M, Uchiyama M, Kazama K, Kato A, Oshima T, Rino Y, Masuda M. Application and outcomes of a standardized lymphadenectomy in laparoscopic right hemicolectomy requiring ligation of the middle colic artery. Tech Coloproctol 2021; 25:223-227. [PMID: 33459968 DOI: 10.1007/s10151-020-02388-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 12/06/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Complete mesocolic excision with central vessel ligation may be important for accurate staging and improving the prognosis of right-sided colon cancer. Although the procedure is often performed laparoscopically, approaching the middle colic artery (MCA) is technically demanding, especially when complete ligation of arteries at their roots is desired. We standardized our laparoscopic approach by establishing the dissection boundary along the superior mesenteric artery to achieve D3 lymphadenectomy in the region of the MCA. The aim of the present study was to evaluate, on the basis of perioperative and short-term oncologic outcomes, the feasibility and safety of our technique METHODS: We conducted a retrospective study on consecutive patients with cancer located at the ascending colon and transverse colon who had laparoscopic right hemicolectomy requiring ligation of the MCA. RESULTS There were 41 patients (22 males, median age 71 years [range 49-86] years). The median operation time was 285 min, and blood loss volume was 40 mL. Conversion to open surgery was required in 1 case. Complications that were Clavien-Dindo grade III or above occurred in 3 patients (7.3%). There was no anastomotic leakage. The median number of lymph nodes harvested was 46. CONCLUSIONS Our technique was shown to be a safe, feasible, and useful strategy for performance of right hemicolectomy requiring ligation of the MCA in cases of colon cancer. The technique facilitates maximal lymph node dissection. Having obtained favorable outcomes, we look forward to investigation into long-term outcomes.
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Affiliation(s)
- S Sato
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan. .,Department of Surgery, Yokohama City University, Yokohama, Japan.
| | - N Sugano
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan
| | - M Shiozawa
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan
| | - M Uchiyama
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan
| | - K Kazama
- Department of Surgery, Yokohama City University, Yokohama, Japan
| | - A Kato
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan
| | - T Oshima
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan
| | - Y Rino
- Department of Surgery, Yokohama City University, Yokohama, Japan
| | - M Masuda
- Department of Surgery, Yokohama City University, Yokohama, Japan
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Kondo Y, Sakakibara T, Furuta M, Kato J, Kato A, Mase S, Sasaki H, Miyake Y. 333MO Cost-utility analysis of olanzapine in Japanese patients treated with cisplatin-containing highly emetogenic chemotherapy. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kato A, Minami Y, Asakura K, Katamine M, Katsura A, Muramatsu Y, Sato T, Kakizaki R, Hashimoto T, Meguro K, Shimohama T, Ako J. Plaque erosion is associated with less systemic atherosclerosis than other plaque types of acute coronary syndrome. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Previous studies have demonstrated that plaque erosion is associated with less atheromatous plaque at both culprit and non-culprit lesion than other plaque types of acute coronary syndrome (ACS). However, the status of systemic atherosclerosis in patients with plaque erosion remains to be elucidated.
Purpose
To clarify if plaque erosion is associated with less systemic atherosclerosis than other plaque types of ACS.
Methods
A total of 239 consecutive patients with ACS who underwent optical coherence tomography (OCT) imaging of the culprit lesion were enrolled. Patients were classified into either plaque erosion (PE, n=45) or non-plaque erosion (non-PE, n=194) including plaque rupture and calcified nodule based on OCT findings of the culprit lesions. The status of systemic atherosclerosis was assessed by the findings of carotid echography, the severity of aortic arch calcification (AAC; grade 0–3) on chest X-ray, brachial-ankle pulse wave velocity (baPWV) and ankle-brachial pressure index (ABPI).
Results
The maximum intima media thickness (IMT) was significantly thinner in the PE group than in the non-PE group (1.9±0.8 vs. 2.3±0.9 mm, p=0.023) (Panel A). The prevalence of heterogeneous plaque and calcified plaque was significantly lower in the PE group than in the non-PE group (25.0 vs. 50.4%, p=0.010, 18.8 vs. 38.5%, p=0.037, respectively). The prevalence of AAC grade was significantly different between the two groups with a tendency toward lower AAC grade in the PE group than the non-PE group (Panel B). The mean baPWV (1588.1±420.6 vs. 1686.5±363.5 cm/sec, p=0.186) and ABPI (1.1±0.1 vs. 1.1±0.1, p=0.270) was comparable between the two groups.
Conclusion
Plaque erosion was associated with less atherosclerosis in carotid artery and aortic arch than non-plaque erosion. These findings may help further clarify the distinct pathophysiology of plaque erosion.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- A Kato
- Kitasato University School of Medicine, Sagamihara, Japan
| | - Y Minami
- Kitasato University School of Medicine, Sagamihara, Japan
| | - K Asakura
- Kitasato University School of Medicine, Sagamihara, Japan
| | - M Katamine
- Kitasato University School of Medicine, Sagamihara, Japan
| | - A Katsura
- Kitasato University School of Medicine, Sagamihara, Japan
| | - Y Muramatsu
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Sato
- Kitasato University School of Medicine, Sagamihara, Japan
| | - R Kakizaki
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Hashimoto
- Kitasato University School of Medicine, Sagamihara, Japan
| | - K Meguro
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Shimohama
- Kitasato University School of Medicine, Sagamihara, Japan
| | - J Ako
- Kitasato University School of Medicine, Sagamihara, Japan
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Hashimoto T, Minami Y, Asakura K, Katamine M, Kato A, Katsura A, Muramatsu Y, Sato T, Kameda R, Meguro K, Shimohama T, Ako J. Lower levels of low-density lipoprotein cholesterol are associated with lower prevalence of thin-cap fibroatheroma in statin-treated patients with coronary artery disease. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Lowering low-density lipoprotein cholesterol (LDL-C) with statins slows progression of atherosclerotic plaques and reduces cardiovascular events. The 2019 European Society of Cardiology guideline for the management of dyslipidaemias recommends the absolute LDL-C treatment target as <55mg/dL for very high-risk patients, <70 mg/dL for high-risk patients and <100 mg/dL for moderate-risk patients. However, the difference in plaque composition of coronary lesions according to these LDL-C levels remains to be elucidated.
Purpose
To investigate plaque morphologies according to LDL-C levels in statin-treated patients with coronary artery disease (CAD).
Methods
A total of 685 consecutive statin-treated patients with CAD, who underwent optical coherence tomography (OCT) imaging of culprit lesions were enrolled. The prevalence of vulnerable compositions in culprit plaques evaluated by OCT was compared among the groups of patients classified by LDL-C levels (<55, 55–70, 70–100, ≥100 mg/dL).
Results
LDL-C levels <55 mg/dL, <70 mg/dL and <100 mg/dL were observed in 6.3%, 21.8% and 63.9% of patients, respectively. The prevalence of thin-cap fibroatheroma was significantly different among the groups (P=0.014, Figure) with a trend toward lower prevalence in the lower two LDL-C groups than in the higher two LDL-C groups. A gradient with lower prevalence of thrombus in lower LDL-C groups was observed, although the statistical significance was not demonstrated (Figure). There was no significant difference in the prevalence of macrophage or cholesterol crystal among the groups.
Conclusions
Lower LDL-C level was associated with a trend toward lower prevalence of thin-cap fibroatheroma and thrombus in statin-treated patients with CAD.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Hashimoto
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - Y Minami
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - K Asakura
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - M Katamine
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - A Kato
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - A Katsura
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - Y Muramatsu
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - T Sato
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - R Kameda
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - K Meguro
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - T Shimohama
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
| | - J Ako
- Kitasato University School of Medicine, Department of Cardiovascular medicine, Sagamihara, Japan
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7
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Katamine M, Minami Y, Asakura K, Kato A, Katsura A, Sato T, Muramatsu Y, Hashimoto T, Kameda R, Meguro K, Shimohama T, Ako J. Higher level of high sensitivity C-reactive protein is associated with more fibrocalcific plaque and longer lesion in patients with acute coronary syndrome. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The association between the level of high sensitivity C-reactive protein (hsCRP) and coronary plaque characteristics in patients with acute coronary syndrome (ACS) remains to be elucidated.
Purpose
To clarify the morphological characteristics of culprit lesion in patients with ACS according to the hsCRP levels using optical coherence tomography (OCT).
Methods
A total of 215 consecutive patients with ACS, who underwent OCT imaging of culprit lesions were included. The patients were classified into either the higher hsCRP group (hsCRP ≥0.14 mg/dL, n=108) or the lower hsCRP group (hsCRP <0.14 mg/dL, n=107) according to the median preprocedural hsCRP level. The morphological characteristics of culprit lesion assessed by OCT were compared between the two groups.
Results
The higher hsCRP group had higher prevalence of insulin therapy (14 vs. 6%, p=0.037) and current smoker than the lower hsCRP group (37 vs. 18%, p=0.002). The prevalence of long lesion (≥25 mm, 67 vs. 53%, p=0.041) and fibrocalcific plaque (53 vs. 33%, p=0.003) was significantly higher in the higher hsCRP group than in the lower hsCRP group (Figure). On the other hand, the prevalence of plaque rupture (36 vs. 46%, p=0.174) and lipid-rich plaque (47 vs. 64%, p=0.011) was rather lower in the higher hsCRP group than in the lower hsCRP group (Figure). In a multivariate analysis, fibrocalcific plaque (odds ratio [OR]: 2.098, 95% confidence interval [CI]: 1.125–3.913, p=0.019), lesion length (mm, OR: 1.036, 95% CI: 1.010–1.061, p=0.004) and current smoker (OR: 2.757, 95% CI: 1.388–5.476, p=0.003) was independently associated with higher hsCRP level.
Conclusions
ACS patients with high hsCRP levels had more fibrocalcific plaque and longer lesion than those with low hsCRP levels. The association between high hsCRP levels and vulnerable characteristics of culprit plaque was not demonstrated.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- M Katamine
- Kitasato University School of Medicine, Sagamihara, Japan
| | - Y Minami
- Kitasato University School of Medicine, Sagamihara, Japan
| | - K Asakura
- Kitasato University School of Medicine, Sagamihara, Japan
| | - A Kato
- Kitasato University School of Medicine, Sagamihara, Japan
| | - A Katsura
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Sato
- Kitasato University School of Medicine, Sagamihara, Japan
| | - Y Muramatsu
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Hashimoto
- Kitasato University School of Medicine, Sagamihara, Japan
| | - R Kameda
- Kitasato University School of Medicine, Sagamihara, Japan
| | - K Meguro
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Shimohama
- Kitasato University School of Medicine, Sagamihara, Japan
| | - J Ako
- Kitasato University School of Medicine, Sagamihara, Japan
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Ivory MK, Kato A, Hasanzadeh A, Blinov BB. A Paul trap with sectored ring electrodes for experiments with two-dimensional ion crystals. Rev Sci Instrum 2020; 91:053201. [PMID: 32486754 DOI: 10.1063/1.5145102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/10/2020] [Indexed: 06/11/2023]
Abstract
We have developed a trapped ion system for producing two-dimensional (2D) ion crystals for applications in scalable quantum computing, quantum simulations, and 2D crystal phase transition and defect studies. The trap is a modification of a Paul trap with its ring electrode flattened and split into eight identical sectors and its two endcap electrodes shaped as truncated hollow cones for laser and imaging optics access. All ten trap electrodes can be independently DC-biased to create various aspect ratio trap geometries. We trap and Doppler cool 2D crystals of up to 30 Ba+ ions and demonstrate the tunability of the trapping potential both in the plane of the crystal and in the transverse direction.
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Affiliation(s)
- M K Ivory
- University of Washington Department of Physics, Seattle, Washington 98115, USA
| | - A Kato
- University of Washington Department of Physics, Seattle, Washington 98115, USA
| | - A Hasanzadeh
- University of Washington Department of Physics, Seattle, Washington 98115, USA
| | - B B Blinov
- University of Washington Department of Physics, Seattle, Washington 98115, USA
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Delord K, Kato A, Tarroux A, Orgeret F, Cotté C, Ropert-Coudert Y, Cherel Y, Descamps S. Antarctic petrels 'on the ice rocks': wintering strategy of an Antarctic seabird. R Soc Open Sci 2020; 7:191429. [PMID: 32431861 PMCID: PMC7211841 DOI: 10.1098/rsos.191429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 02/17/2020] [Indexed: 06/11/2023]
Abstract
There is a paucity of information on the foraging ecology, especially individual use of sea-ice features and icebergs, over the non-breeding season in many seabird species. Using geolocators and stable isotopes, we defined the movements, distribution and diet of adult Antarctic petrels Thalassoica antarctica from the largest known breeding colony, the inland Svarthamaren, Antarctica. More specifically, we examined how sea-ice concentration and free-drifting icebergs affect the distribution of Antarctic petrels. After breeding, birds moved north to the marginal ice zone (MIZ) in the Weddell sector of the Southern Ocean, following its northward extension during freeze-up in April, and they wintered there in April-August. There, the birds stayed predominantly out of the water (60-80% of the time) suggesting they use icebergs as platforms to stand on and/or to rest. Feather δ15N values encompassed one full trophic level, indicating that birds fed on various proportions of crustaceans and fish/squid, most likely Antarctic krill Euphausia superba and the myctophid fish Electrona antarctica and/or the squid Psychroteuthis glacialis. Birds showed strong affinity for the open waters of the northern boundary of the MIZ, an important iceberg transit area, which offers roosting opportunities and rich prey fields. The strong association of Antarctic petrels with sea-ice cycle and icebergs suggests the species can serve, year-round, as a sentinel of environmental changes for this remote region.
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Affiliation(s)
- K. Delord
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
| | - A. Kato
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
| | - A. Tarroux
- Norwegian Institute for Nature Research, Fram Centre, 9296 Tromsø, Norway
- Norwegian Polar Institute, Fram Centre, 9296 Tromsø, Norway
| | - F. Orgeret
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
- Department of Zoology, Nelson Mandela, University, Port Elizabeth, South Africa
| | - C. Cotté
- Laboratoire d'Océanographie et du Climat, Expérimentation et Approches Numériques, Institut Pierre Simon Laplace, Université Pierre et Marie Curie, Centre National de la Recherche Scientifique, Paris, France
- Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, Paris, France
| | - Y. Ropert-Coudert
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
| | - Y. Cherel
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
| | - S. Descamps
- Norwegian Polar Institute, Fram Centre, 9296 Tromsø, Norway
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Sakao Y, Kato A, Sugiura T, Fujikura T, Misaki T, Tsuji T, Sakakima M, Yasuda H, Fujigaki Y, Hishida A. Cloudy Dialysate and Pseudomembranous Colitis in a Patient on CAPD. Perit Dial Int 2020. [DOI: 10.1177/089686080802800528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Y. Sakao
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - A. Kato
- Division of Blood Purification Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - T. Sugiura
- Hamamatsu University School of Medicine, Hamamatsu Department of Internal Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - T. Fujikura
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - T. Misaki
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - T. Tsuji
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - M. Sakakima
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - H. Yasuda
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - Y. Fujigaki
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
| | - A. Hishida
- First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
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Muramatsu Y, Minami Y, Ishida K, Kato A, Katsura A, Sato T, Kakizaki R, Nemoto T, Hashimoto T, Fujiyoshi K, Meguro K, Shimohama T, Ako J. P686Cancer is not associated with increased cardiac and bleeding events after 2nd- and 3rd-generation drug-eluting stents implantation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Previous studies demonstrated the impact of concomitant cancer on the increased risk of adverse cardiac and bleeding events after percutaneous coronary intervention (PCI). However, the impact in this 2nd- and 3rd-generation drug-eluting stent (DES) era remains to be elucidated.
Purpose
To clarify the impact of cancer on clinical outcomes in patients after 2nd- or 3rd -generation DES implantation.
Methods
A total of 932 patients who underwent PCI with 2nd- or 3rd -generation DES were included. Patients who were diagnosed with cancer after PCI were excluded from the present cohort. The incidence of major adverse cardiac events (MACE) including cardiac death, myocardial infarction and target or non-target vessel revascularization, and bleeding events was compared between the patients with cancer or the history of treatment for cancer (cancer group, n=140) and the patients without cancer (no cancer group, n=792). Bleeding events were evaluated according to the Thrombolysis in Myocardial Infarction definition. Further comparisons were performed between the 2 groups (cancer group, n=126; no cancer group, n=252) after the adjustment of baseline clinical characteristics using 1:2 propensity score-matching analysis.
Results
The incidence of MACE at median 577 [340–1043] days after the PCI was comparable between the 2 groups in both unadjusted (15.0% vs. 15.0%, p=0.984) (Panel A) and adjusted cohorts (14.3 vs. 13.1%, p=0.796), although the incidence of all cause death in the cancer group was significantly greater than the no cancer group (15.1 vs. 9.5%, p=0.007, in the adjusted cohort). The increased risk of MACE was not observed in any types of cancer or treatment (Panel B). The incidence of bleeding events was also comparable between the 2 groups (4.0 vs. 2.0%, p=0.297, in the adjusted cohort).
Conclusion
The increased incidence of MACE and bleeding events in patients with cancer was not demonstrated after the 2nd- or 3rd-generation DES implantation. Further studies are required to clarify the safety and efficacy of PCI in patients with cancer.
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Affiliation(s)
- Y Muramatsu
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - Y Minami
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - K Ishida
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - A Kato
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - A Katsura
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - T Sato
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - R Kakizaki
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - T Nemoto
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - T Hashimoto
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - K Fujiyoshi
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - K Meguro
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - T Shimohama
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
| | - J Ako
- Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan
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12
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Oki T, Otake M, Ito M, Kato A, Hatoya M. The educational intervention on the families having dementia patients. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Katsura A, Minami Y, Kato A, Sato T, Muramatsu Y, Kakizaki R, Nemoto T, Hashimoto T, Fujiyoshi K, Meguro K, Shimohama T, Tojo T, Ako J. 6109A novel parameter for stent expansion is superior to conventional parameters for predicting adverse events after drug-eluting stent implantation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Among several parameters for stent expansion, which is better for predicting adverse events remains to be elucidated.
Purpose
To assess the predictive significance of several parameters for stent expansion on the incidence of adverse cardiac events.
Methods
A total of 183 consecutive patients with de novo lesion treated with drug-eluting stent (DES) under optical coherence tomography (OCT) guidance were enrolled. The stent expansion was retrospectively assessed on the final OCT images after the stent implantation by both conventional and novel parameters. The conventional parameters included the minimum stent cross-sectional area (MSA) and %stent expansion defined as [MSA/mean reference lumen cross-sectional area × 100]. The novel parameter was the minimum expansion index (MEI) calculated by using a novel algorhythm which yields the ideal lumen area in each frame by taking into account vessel tapering. The expansion index was calculated by [actual lumen area/ideal lumen area × 100] in each frame through the stented segment. The MEI was the minimum value of expansion index through the stented segment. The both conventional and novel parameters were compared between cases with and without device-oriented cardiac events (DoCE). Receiver operating characteristics (ROC) curves were constructed to assess the ability of those parameters to predict DoCE.
Results
The MSA and MEI in the DoCE group (n=12) were significantly smaller than the no DoCE group (n=171) (3.29±0.72 vs. 4.45±1.97 mm2, p<0.001, 66.9±10.6 vs. 78.3±14.8%, p=0.01, respectively), although the %stent expansion was not significantly different between the two groups (62.7±11.9 vs. 70.7±16.3%, p=0.094). In ROC analyses, the area under curve of MEI to predict DoCE was the largest among the parameters (Figure).
Conclusion
Among several parameters for stent expansion, a novel MEI was better to predict device-oriented cardiac events after DES implantation.
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Affiliation(s)
- A Katsura
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - Y Minami
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - A Kato
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - T Sato
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - Y Muramatsu
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - R Kakizaki
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - T Nemoto
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - T Hashimoto
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - K Fujiyoshi
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - K Meguro
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - T Shimohama
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - T Tojo
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
| | - J Ako
- Kitasato University of Medicine, Cardiovascular Medicine, 1–15–1, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan
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14
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Mazda Y, Kikuchi T, Yoshimatsu A, Kato A, Nagashima S, Terui K. Acupuncture for reducing pruritus induced by intrathecal morphine at elective cesarean delivery: a placebo-controlled, randomized, double-blind trial. Int J Obstet Anesth 2018; 36:66-76. [PMID: 30131262 DOI: 10.1016/j.ijoa.2018.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 07/04/2018] [Accepted: 07/21/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND Intrathecal morphine is a standard postoperative analgesic administered after cesarean delivery, but frequently causes pruritus. Acupuncture reportedly resolves refractory pruritus in certain patients. The aim of the study was to investigate the effectiveness of acupuncture in preventing pruritus induced by intrathecal morphine. METHODS Thirty parturients received intrathecal hyperbaric bupivacaine (12 mg), fentanyl (10 µg), and morphine (150 µg) for spinal anesthesia at elective cesarean delivery at term. Patients were randomly divided into the acupuncture group (n=15) and the control group (n=15). In the acupuncture and control groups, certified acupuncturists inserted either indwelling press needles or sham needles, into Hegu (LI4), Neiguan (PC6), Quchi (LI11), and Zhigou (SJ6) on both arms the day before surgery. Needles were removed 48 hours postoperatively. The primary outcome was the incidence of postoperative pruritus. Adverse effects including nausea and vomiting were also investigated. RESULTS There were no significant differences between the acupuncture group and the control group in the incidence of pruritus (67% vs. 67%, P=1.000, RR 1.0 [95% CI 0.60 to 1.66]) or the requirement for antipruritic therapy (6.7% vs. 20.0%, P=0.283, RR 0.33 [95% CI 0.04 to 2.85]). The incidence of postoperative nausea in the acupuncture group versus control group was 40.0% vs. 13.3%, P=0.099, RR 3.0 [95% CI 0.72 to 12.6]). The postoperative analgesic effect was comparable. CONCLUSION Preoperatively administered acupuncture using press needles did not decrease intrathecal morphine-induced pruritus or the requirement for treatment.
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Affiliation(s)
- Y Mazda
- Department of Obstetric Anesthesia, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan; Department of Anesthesia and Pain Management, Mount Sinai Hospital, University of Toronto, Toronto, Canada.
| | - T Kikuchi
- Department of Oriental Medicine, Saitama Medical University, Moroyama, Japan; Department of Anesthesia, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - A Yoshimatsu
- Department of Anesthesia, Ibaraki Prefectural Central Hospital, Kasama, Japan
| | - A Kato
- Department of Obstetric Anesthesia, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - S Nagashima
- Department of Anesthesia, Kitasato Medical Center Hospital, Kitasato University, Kitamoto, Japan
| | - K Terui
- Department of Obstetric Anesthesia, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
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15
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Nishimoto-Kakiuchi A, Netsu S, Okabayashi S, Taniguchi K, Tanimura H, Kato A, Suzuki M, Sankai T, Konno R. Spontaneous endometriosis in cynomolgus monkeys as a clinically relevant experimental model. Hum Reprod 2018; 33:1228-1236. [PMID: 29684118 PMCID: PMC6012197 DOI: 10.1093/humrep/dey095] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/01/2018] [Accepted: 04/04/2018] [Indexed: 11/25/2022] Open
Abstract
STUDY QUESTION Does spontaneous endometriosis in cynomolgus monkeys have the characteristics required of a good experimental model? SUMMARY ANSWER Spontaneous endometriosis in cynomolgus monkeys exhibited similar clinicopathological characteristics to the human disease and was useful as an experimental model. WHAT IS KNOWN ALREADY The prevalence of endometriosis in autopsied cynomolgus monkeys (Macaca fascicularis) in a breeding colony was reported to be 28.7% in 1993. The histopathological findings we reported recently showed that components of spontaneous endometriosis were not only endometriotic epithelium and stromal cells (CD10-positive) with hemorrhage and inflammation, but also smooth muscle metaplasia and nerve fibers. STUDY DESIGN, SIZE, DURATION During routine medical examinations at a research facility from 2008 to 2012, 614 female cynomolgus monkeys of reproductive age (6-25 years) were screened for endometriosis by the presence of regular menstrual bleeding, serum CA125 levels and palpation of the abdomen. In total, 29 monkeys were selected as subjects for the following study. PARTICIPANTS/MATERIALS, SETTING, METHODS Of the 29 monkeys selected, 15 were diagnosed with endometriosis by laparoscopy and/or open surgery. The monkeys were monitored by observing their general condition, and eight of these were monitored using laparoscopy and MRI. In addition, to investigate appropriate screening parameters and endometriosis-associated biological parameters in monkeys, we retrospectively examined general laboratory parameters that correlate to the menstrual cycle and disease status. MAIN RESULTS AND THE ROLE OF CHANCE The combination of CA125 serum levels (this was a useful marker for chocolate cysts), palpation of the abdomen, and fecal abnormalities was the most efficient screening method for diagnosing monkeys with endometriosis. Each animal could be diagnosed and assigned a disease stage by laparoscopy. While monitoring the disease stage by laparoscopy and/or MRI, disease status in individual monkeys was mainly stable or was progressive for 2-7 months. The detection rate by screening was low (15/614) but age-specific analysis suggests that screening would be more efficient if a colony for an endometriosis model is maintained with 11-20-year olds. As an endometriosis-associated biological parameter, the decrease in food consumption that coincided with menstruation was selected and correlated well (R2 value = 0.8239) with disease status (according to a modified adhesion revised American Fertility Society score). LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Peritoneal fluid was not analyzed because a smaller amount is produced in cynomolgus monkeys than in baboons. Although clinical endometriosis-associated pain is evaluated in women using a visual analog scale, pain could not be directly evaluated in this non-human primate model. WIDER IMPLICATIONS OF THE FINDINGS Although cynomolgus monkeys are relatively small (2-5 kg) primates, laparoscopy and MRI make it possible to evaluate spontaneous endometriosis in these monkeys and to monitor its development over time. Spontaneous endometriosis in cynomolgus monkeys is a useful model for evaluating disease progress and drug efficacy because they have similar lesions to those in humans, and conventional laboratory methods and parameters for assessment are well established. STUDY FUNDING/COMPETING INTEREST(S) No external funds were used for this study. A.N.-K., K.T., H.T., A.K. and M.S. are full-time employees of Chugai Pharmaceutical Co., Ltd. R.K. received a consultancy fee from Chugai Pharmaceutical Co., Ltd. and lecture fees from Chugai Pharmaceuticals, Japan Vaccine Co. Ltd., Merck & Co., Mochida Co. Ltd., Roche Diagnostics, and BD, unrelated to the submitted work. S.N., S.O. and T.S. have nothing to declare.
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Affiliation(s)
- A Nishimoto-Kakiuchi
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa, Japan
| | - S Netsu
- Department of Obstetrics and Gynecology, Jichi Medical University Saitama Medical Center, 1-847 Amanumacho, Omiya-ku, Saitama, Saitama, Japan
| | - S Okabayashi
- Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, 1-1 Hachimandai, Tsukuba, Ibaraki, Japan
| | - K Taniguchi
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa, Japan
| | - H Tanimura
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa, Japan
| | - A Kato
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa, Japan
| | - M Suzuki
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa, Japan
| | - T Sankai
- Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, 1-1 Hachimandai, Tsukuba, Ibaraki, Japan
| | - R Konno
- Department of Obstetrics and Gynecology, Jichi Medical University Saitama Medical Center, 1-847 Amanumacho, Omiya-ku, Saitama, Saitama, Japan
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16
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Matsuda H, Goto M, Kato A, Kouji H, Sakai T, Hatano Y. 062 Involvement of β-catenin/CBP-dependent signaling in the emergence of hapten-induced atopic dermatitis-like dermatitis. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Bouquet J, King DT, Vadlamani G, Benzie GR, Iorga B, Ide D, Adachi I, Kato A, Vocadlo DJ, Mark BL, Blériot Y, Désiré J. Selective trihydroxylated azepane inhibitors of NagZ, a glycosidase involved in Pseudomonas aeruginosa resistance to β-lactam antibiotics. Org Biomol Chem 2018; 15:4609-4619. [PMID: 28513749 DOI: 10.1039/c7ob00838d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a series of d-gluco-like configured 4,5,6-trihydroxyazepanes bearing a triazole, a sulfonamide or a fluorinated acetamide moiety at C-3 is described. These synthetic derivatives have been tested for their ability to selectively inhibit the muropeptide recycling glucosaminidase NagZ and to thereby increase sensitivity of Pseudomonas aeruginosa to β-lactams, a pathway with substantial therapeutic potential. While introduction of triazole and sulfamide groups failed to lead to glucosaminidase inhibitors, the NHCOCF3 analog proved to be a selective inhibitor of NagZ over other glucosaminidases including human O-GlcNAcase and lysosomal hexosaminidases HexA and B.
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Affiliation(s)
- J Bouquet
- Equipe Synthèse Organique, Groupe Glycochimie, IC2MP, UMR CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, 86073 Poitiers cedex 09, France.
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18
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Imoto Y, Kato A, Takabayashi T, Sakashita M, Norton JE, Suh LA, Carter RG, Weibman AR, Hulse KE, Stevens W, Harris KE, Peters AT, Grammer LC, Tan BK, Welch K, Conley DB, Kern RC, Fujieda S, Schleimer RP. Short-chain fatty acids induce tissue plasminogen activator in airway epithelial cells via GPR41&43. Clin Exp Allergy 2018; 48:544-554. [PMID: 29431874 DOI: 10.1111/cea.13119] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 11/30/2017] [Accepted: 12/22/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Chronic rhinosinusitis (CRS) is a heterogeneous chronic inflammatory disease generally divided based on the presence or absence of nasal polyps (NPs). One of the features of NPs is excessive fibrin deposition, which is associated with down-regulation of tissue plasminogen activator (t-PA) in NPs. As t-PA is expressed in epithelial cells, and epithelium is readily accessible to topical therapies, identifying compounds that can mediate the induction of t-PA would be a potential new strategy for the treatment of NPs. OBJECTIVE The objective of this study was to determine whether short-chain fatty acids (SCFAs) can induce t-PA in airway epithelial cells via their known receptors GPR41 and GPR43. METHODS We performed immunohistochemistry (IHC) to determine whether receptors for SCFAs, known as G protein-coupled receptor 41/free fatty acid receptor 3 (GPR41/FFAR3) and GPR43/FFAR2, are expressed in nasal tissue. Primary normal human bronchial epithelial (NHBE) cells were stimulated with different concentrations of SCFAs to test induction of t-PA, which was analysed by expression of mRNA and protein. Mediation of responses by SCFA receptors was evaluated by specific receptor gene silencing with siRNA. RESULTS Immunohistochemistry study revealed that airway epithelial cells expressed GPR41 and GPR43. Acetic acid, propionic acid, butyric acid and valeric acid significantly induced t-PA expression from two- to tenfolds. The strongest inducer of t-PA from NHBE cells was propionic acid; cells stimulated with propionic acid released t-PA into the supernatant in its active form. Gene silencing of GPR41 and GPR43 revealed that induction of t-PA by SCFAs was dependent upon both GPR41 and GPR43. CONCLUSIONS AND CLINICAL RELEVANCE Short-chain fatty acids were shown to induce airway epithelial cell expression of t-PA via GPR41 and GPR43. Topical delivery of potent compounds that activate these receptors may have value by reducing fibrin deposition and shrinking nasal polyp growth.
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Affiliation(s)
- Y Imoto
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - A Kato
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - T Takabayashi
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - M Sakashita
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - J E Norton
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - L A Suh
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - R G Carter
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - A R Weibman
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - K E Hulse
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - W Stevens
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - K E Harris
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - A T Peters
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - L C Grammer
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - B K Tan
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - K Welch
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - D B Conley
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - R C Kern
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - S Fujieda
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - R P Schleimer
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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19
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Murakami G, Hojo Y, Kato A, Komatsuzaki Y, Horie S, Soma M, Kim J, Kawato S. Rapid nongenomic modulation by neurosteroids of dendritic spines in the hippocampus: Androgen, oestrogen and corticosteroid. J Neuroendocrinol 2018; 30. [PMID: 29194818 DOI: 10.1111/jne.12561] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 11/24/2017] [Accepted: 11/27/2017] [Indexed: 12/22/2022]
Abstract
Memories are stored in synapses that consist of axon terminals and dendritic spines. Dendritic spines are postsynaptic structures of synapses and are essential for synaptic plasticity and cognition. Therefore, extensive investigations concerning the functions and structures of spines have been performed. Sex steroids and stress steroids have been shown to modulate hippocampal synapses. Although the rapid modulatory action of sex steroids on synapses has been studied in hippocampal neurones over several decades, the essential molecular mechanisms have not been fully understood. Here, a description of kinase-dependent signalling mechanisms is provided that can explain the rapid nongenomic modulation of dendritic spinogenesis in rat and mouse hippocampal slices by the application of sex steroids, including dihydrotestosterone, testosterone, oestradiol and progesterone. We also indicate the role of synaptic (classic) sex steroid receptors that trigger these rapid synaptic modulations. Moreover, we describe rapid nongenomic spine modulation by applying corticosterone, which is an acute stress model of the hippocampus. The explanations for the results obtained are mainly based on the optical imaging of dendritic spines. Comparisons are also performed with results obtained from other types of imaging, including electron microscopic imaging. Relationships between spine modulation and modulation of cognition are discussed. We recognise that most of rapid effects of exogenously applied oestrogen and androgen were observed in steroid-depleted conditions, including acute slices of the hippocampus, castrated male animals and ovariectomised female animals. Therefore, the previously observed effects can be considered as a type of recovery event, which may be essentially similar to hormone replacement therapy under hormone-decreased conditions. On the other hand, in gonadally intact young animals with high levels of endogenous sex hormones, further supplementation of sex hormones might not be effective, whereas the infusion of blockers for steroid receptors or kinases may be effective, with respect to suppressing sex hormone functions, thus providing useful information regarding molecular mechanisms.
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Affiliation(s)
- G Murakami
- Department of Liberal Arts, Faculty of Medicine, Saitama Medical University, Iruma, Saitama, Japan
| | - Y Hojo
- Department of Biochemistry, Faculty of Medicine, Saitama Medical University, Iruma, Saitama, Japan
| | - A Kato
- Department of Biophysics and Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo, Japan
| | - Y Komatsuzaki
- Department of Physics, College of Science and Technology, Nihon University, Chiyoda, Tokyo, Japan
| | - S Horie
- Department of Urology, Graduate School of Medicine, Juntendo University, Hongo, Tokyo, Japan
| | - M Soma
- Department of Cognitive Neuroscience, Faculty of Pharma-Science, Teikyo University, Itabashi, Tokyo, Japan
| | - J Kim
- Department of Cognitive Neuroscience, Faculty of Pharma-Science, Teikyo University, Itabashi, Tokyo, Japan
| | - S Kawato
- Department of Biophysics and Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo, Japan
- Department of Urology, Graduate School of Medicine, Juntendo University, Hongo, Tokyo, Japan
- Department of Cognitive Neuroscience, Faculty of Pharma-Science, Teikyo University, Itabashi, Tokyo, Japan
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20
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Glawar AFG, Martínez RF, Ayers BJ, Hollas MA, Ngo N, Nakagawa S, Kato A, Butters TD, Fleet GWJ, Jenkinson SF. Structural essentials for β-N-acetylhexosaminidase inhibition by amides of prolines, pipecolic and azetidine carboxylic acids. Org Biomol Chem 2018; 14:10371-10385. [PMID: 27735004 DOI: 10.1039/c6ob01549b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This paper explores the computer modelling aided design and synthesis of β-N-acetylhexosaminidase inhibitors along with their applicability to human disease treatment through biological evaluation in both an enzymatic and cellular setting. We investigated the importance of individual stereocenters, variations in structure-activity relationships along with factors influencing cell penetration. To achieve these goals we modified nitrogen heterocycles in terms of ring size, side chains present and ring nitrogen derivatization. By reducing the inhibitor interactions with the active site down to the essentials we were able to determine that besides the established 2S,3R trans-relationship, the presence and stereochemistry of the CH2OH side chain is of crucial importance for activity. In terms of cellular penetration, N-butyl side chains favour cellar uptake, while hydroxy- and carboxy-group bearing sidechains on the ring nitrogen retarded cellular penetration. Furthermore we show an early proof of principle study that β-N-acetylhexosaminidase inhibitors can be applicable to use in a potential anti-invasive anti-cancer strategy.
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Affiliation(s)
- A F G Glawar
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK. and Oxford Glycobiology Institute, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - R F Martínez
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - B J Ayers
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - M A Hollas
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - N Ngo
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - S Nakagawa
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - A Kato
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - T D Butters
- Oxford Glycobiology Institute, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - G W J Fleet
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK. and Oxford Glycobiology Institute, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - S F Jenkinson
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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Ikawa Y, Fujita N, Yachi Y, Inoue N, Kato A, Kuroda M, Yachie A. Cover Image: Life-threatening complications of jellyfish Chrysaora pacifica stings in a 5-year-old child. Br J Dermatol 2017; 175:837-8. [PMID: 27650747 DOI: 10.1111/bjd.14856] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Y Ikawa
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - N Fujita
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Y Yachi
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - N Inoue
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - A Kato
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - M Kuroda
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - A Yachie
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
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Sato K, Namiuchi S, Sugie T, Takii T, Ushigome R, Kato A, Yoshida S, Shimokawa H. P4281Impact of myocardial infarction during elective coronary intervention on long-term prognosis. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Takii T, Namiuchi S, Sato K, Ushigome R, Sugie T, Yoshida S, Kato A. P2344Quantitative and qualitative plaque analysis for prediction of no-reflow phenomenon during elective coronary intervention. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Shinohara Y, Kato A, Kuya K, Okuda K, Sakamoto M, Kowa H, Ogawa T. Perfusion MR Imaging Using a 3D Pulsed Continuous Arterial Spin-Labeling Method for Acute Cerebral Infarction Classified as Branch Atheromatous Disease Involving the Lenticulostriate Artery Territory. AJNR Am J Neuroradiol 2017; 38:1550-1554. [PMID: 28596191 DOI: 10.3174/ajnr.a5247] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 03/27/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE Branch atheromatous disease is a stroke subtype considered a risk factor for early neurologic deterioration. Meanwhile, crossed cerebellar diaschisis is thought to be influenced by the degree and location of supratentorial perfusion abnormalities and is associated with the clinical outcome in the case of an ischemic stroke. In this article, our aim was to clarify the utility of using a whole-brain 3D pulsed continuous arterial spin-labeling method as an imaging biomarker for predicting neurologic severity in branch atheromatous disease. MATERIALS AND METHODS Twenty-three patients with branch atheromatous disease in the lenticulostriate artery territory were enrolled. All patients underwent MR imaging, including DWI, 3D-TOF-MRA, and 3D-arterial spin-labeling. We measured the asymmetry index of CBF in the affected area (branch atheromatous disease), the asymmetry index of the contralateral cerebellar hemisphere (crossed cerebellar diaschisis), and the DWI infarct volume in the lenticulostriate artery territory. We also compared each parameter with the initial NIHSS score with the Pearson correlation coefficient. RESULTS Among the 23 patients, we found no correlation between NIHSS score and the asymmetry index of CBF in the affected area (branch atheromatous disease) (r = -0.027, P = .724), whereas the asymmetry index of the contralateral cerebellar hemisphere (crossed cerebellar diaschisis) and DWI infarct volumes were significantly correlated with NIHSS score (r = 0.515, P = .012; r = 0.664, P = .001, respectively). CONCLUSIONS In patients with branch atheromatous disease, 3D-arterial spin-labeling can detect crossed cerebellar diaschisis, which is correlated with the degree of neurologic severity.
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Affiliation(s)
- Y Shinohara
- From the Division of Radiology (Y.S., A.K., K.K., T.O.), Department of Pathophysiological and Therapeutic Science, Faculty of Medicine
| | - A Kato
- From the Division of Radiology (Y.S., A.K., K.K., T.O.), Department of Pathophysiological and Therapeutic Science, Faculty of Medicine
| | - K Kuya
- From the Division of Radiology (Y.S., A.K., K.K., T.O.), Department of Pathophysiological and Therapeutic Science, Faculty of Medicine
| | - K Okuda
- Division of Clinical Radiology (K.O.)
| | - M Sakamoto
- Division of Neurosurgery (M.S.), Department of Brain and Neurosciences, Faculty of Medicine
| | - H Kowa
- Division of Neurology (H.K.), Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Yonago, Japan
| | - T Ogawa
- From the Division of Radiology (Y.S., A.K., K.K., T.O.), Department of Pathophysiological and Therapeutic Science, Faculty of Medicine
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25
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Hoshikawa M, Kato A, Hojo H, Shibata Y, Kumamoto N, Watanabe M, Ugawa S. Distribution of ASIC4 transcripts in the adult wild-type mouse brain. Neurosci Lett 2017; 651:57-64. [PMID: 28461138 DOI: 10.1016/j.neulet.2017.03.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/21/2017] [Accepted: 03/21/2017] [Indexed: 01/27/2023]
Abstract
Acid-sensing ion channel 4 (ASIC4) belongs to the ASIC gene family of neuronal proton-gated cation channels, and is the least understood subtype among the members. Previous studies of ASIC4 expression in the mammalian central nervous system have shown that ASIC4 is abundantly expressed in the spinal cord and in various brain regions, such as the cerebral cortex, the hippocampus, and the cerebellum. However, the detailed distribution of ASIC4 transcripts in mammalian brains still remains to be elucidated. In the present study, radioactive in situ hybridization histochemistry with an ASIC4-specific cRNA probe was performed on wild-type mouse brains, followed by X-gal staining experiments with Asic4-lacZ reporter mice Asic4tm1a(KOMP)Mbp. It was found that ASIC4 mRNAs were widely expressed throughout the wild-type brain, but preferentially concentrated in the olfactory bulb, the piriform cortex, the caudate putamen, the preoptic area, the paraventricular nucleus, the medial habenular nucleus, the pretectal area, the lateral geniculate nucleus, the amygdaloid complex, the superior colliculus, the interpeduncular nucleus, and the granule cell layer of the ventral hippocampus, and these results were in agreement with the X-gal-positive reactions observed in the mutant brain. In addition, X-gal staining combined with immunohistochemistry identified intense signals for ASIC4 transcriptional activity in most of the choline acetyltransferase (ChAT)-positive principal neurons located in the basal forebrain cholinergic nuclei. Our data provide useful information to speculate possible roles of ASIC4 in diverse brain functions.
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Affiliation(s)
- M Hoshikawa
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - A Kato
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - H Hojo
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - Y Shibata
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - N Kumamoto
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - M Watanabe
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - S Ugawa
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan.
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26
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Seki T, Mutoh T, Kumazawa R, Saito K, Nakamura Y, Sakamoto M, Watanabe T, Kubo S, Shimozuma T, Yoshimura Y, Igami H, Ohkubo K, Takeiri Y, Oka Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Kaneko O, Miyazawa J, Morita S, Narihara K, Shoji M, Masuzaki S, Goto M, Morisaki T, Peterson BJ, Sato K, Tokuzawa T, Ashikawa N, Nishimura K, Funaba H, Chikaraishi H, Takeuchi N, Notake T, Ogawa H, Torii Y, Shimpo F, Nomura G, Yokota M, Takahashi C, Kato A, Takase Y, Kasahara H, Ichimura M, Higaki H, Zhao YP, Kwak JG, Yamada H, Kawahata K, Ohyabu N, Ida K, Nagayama Y, Noda N, Watari T, Komori A, Sudo S, Motojima O. Study of Long-Pulse Plasma Experiment Using ICRF Heating in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | - T. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Takeuchi
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - T. Notake
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - H. Ogawa
- Graduate University for Advanced Studies, Hayama 240-0162, Japan
| | - Y. Torii
- Kyoto University, Institute of Advanced Energy, Uji 611-0011, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokota
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Kato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | | | | | - H. Higaki
- University of Tsukuba, Tsukuba, Japan
| | - Y. P. Zhao
- Institute of Plasma Physics, Academia Sinica, Hefei 230031, P.R. China
| | - J. G. Kwak
- Korea Atomic Energy Research Institute, Daejeon 305-600, Korea Rep
| | - H. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Noda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, Toki 509-5292, Japan
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Feldman S, Kasjanski R, Poposki J, Hernandez D, Chen JN, Norton JE, Suh L, Carter RG, Stevens WW, Peters AT, Kern RC, Conley DB, Tan BK, Shintani-Smith S, Welch KC, Grammer LC, Harris KE, Kato A, Schleimer RP, Hulse KE. Chronic airway inflammation provides a unique environment for B cell activation and antibody production. Clin Exp Allergy 2017; 47:457-466. [PMID: 28000955 DOI: 10.1111/cea.12878] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 12/06/2016] [Accepted: 12/11/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND B cells play many roles in health and disease. However, little is known about the mechanisms that drive B cell responses in the airways, especially in humans. Chronic rhinosinusitis (CRS) is an inflammatory disease of the upper airways that affects 10% of Europeans and Americans. A subset of CRS patients develop nasal polyps (NPs), which are characterized by type 2 inflammation, eosinophils and group 2 innate lymphoid cells (ILC2s). We have reported that NP contain elevated levels of B cells and antibodies, making NP an ideal system for studying B cells in the airways. OBJECTIVE We sought to determine the mechanisms that drive B cell activation and antibody production during chronic airway inflammation. METHODS We analysed B cells from NP or tonsil, or after ILC2 coculture, by flow cytometry. Antibody production from tissue was measured using Luminex assays and the frequency of antibody-secreting cells by ELISpot. Formation of B cell clusters was assessed using immunohistochemistry. Expression of genes associated with B cell activation and class switch recombination was measured by qRT-PCR. RESULTS NP contained significantly elevated frequencies of plasmablasts, especially those that expressed the extrafollicular marker Epstein-Barr virus-induced protein 2 (EBI2), but significantly fewer germinal centre (GC) B cells compared with tonsil. Antibody production and the frequency of antibody-secreting cells were significantly elevated in NP, and there was evidence for local class switch recombination in NP. Finally, ILC2s directly induced EBI2 expression on B cells in vitro. CONCLUSIONS AND CLINICAL RELEVANCE Our data suggest there is a unique B cell activation environment within NP that is distinct from classic GC-mediated mechanisms. We show for the first time that ILC2s directly induce EBI2 expression on B cells, indicating that ILC2s may play an important role in B cell responses. B cell-targeted therapies may provide new treatment options for CRSwNP.
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Affiliation(s)
- S Feldman
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - R Kasjanski
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - J Poposki
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - D Hernandez
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - J N Chen
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - J E Norton
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - L Suh
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - R G Carter
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - W W Stevens
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - A T Peters
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - R C Kern
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - D B Conley
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - B K Tan
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - S Shintani-Smith
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - K C Welch
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - L C Grammer
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - K E Harris
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - A Kato
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - R P Schleimer
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - K E Hulse
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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Tanaka H, Kato A, Kawaguchi M, Yamaguchi T, Kitahara M, Matsuyama K, Okada S, Matsuo M. Pelvic Insufficiency Fractures After Whole-Pelvic Irradiation for Uterine Cervical Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Nishimoto-Kakiuchi A, Netsu S, Matsuo S, Hayashi S, Ito T, Okabayashi S, Yasmin L, Yuzawa K, Kondoh O, Kato A, Suzuki M, Konno R, Sankai T. Characteristics of histologically confirmed endometriosis in cynomolgus monkeys. Hum Reprod 2016; 31:2352-9. [PMID: 27591226 PMCID: PMC5027930 DOI: 10.1093/humrep/dew209] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 07/26/2016] [Indexed: 11/24/2022] Open
Abstract
STUDY QUESTION What are the characteristics of spontaneous endometriosis in cynomolgus monkeys? SUMMARY ANSWER Spontaneous endometriosis in cynomolgus monkeys exhibited similar characteristics to the human disease. WHAT IS KNOWN ALREADY One previous report described the prevalence and the basic histopathology of spontaneous endometriosis in cynomolgus monkeys. STUDY DESIGN, SIZE, DURATION Endometriotic lesions that had been histologically confirmed in 8 female cynomolgus monkeys between 5 and 21 years old were subjected to study. PARTICIPANTS/MATERIALS, SETTING, METHODS The monkeys died of, or were sacrificed because of, sickness consequent on endometriosis. Specimens were evaluated histopathologically with haematoxylin and eosin staining, iron staining and immunohistochemistry (CD10, CD31, α-SMA and PGP9.5), and by observing them under a microscope. MAIN RESULTS AND THE ROLE OF CHANCE Endometriotic and stromal cells (CD10-positive) with haemorrhage and inflammation were observed. Smooth muscle metaplasia and nerve fibres were also noted in the endometriotic lesions. Endometriotic lesions in lymph nodes were incidentally found. LIMITATIONS AND REASONS FOR CAUTION Since laparoscopic analysis for monitoring the disease state was not set as a parameter of the current study, time course changes (progression) of the disease were not assessed. WIDER IMPLICATIONS OF THE FINDINGS Further investigation of spontaneous endometriosis in cynomolgus monkeys may contribute to better understanding of the disease pathobiology. STUDY FUNDING/COMPETING INTEREST(S) No external funds were used for this study. A.N.K., S.M., S.H., T.I., O.K., A.K. and M.S. are full-time employees of Chugai Pharmaceutical Co., Ltd. R.K. received lecture fees from Chugai Pharmaceutical Co., Ltd., unrelated to the submitted work. S.N., S. O., L.Y., K.Y. and T.S. have nothing to declare. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- A Nishimoto-Kakiuchi
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - S Netsu
- Department of Obstetrics and Gynecology, Jichi Medical University Saitama Medical Center, 1-847 Amanumacho, Omiya-ku, Saitama-shi, Saitama 330-8503, Japan
| | - S Matsuo
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - S Hayashi
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - T Ito
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - S Okabayashi
- Tsukuba Primate Research Center, National Institute of Biomedical Innovation, Health and Nutrition, 1-1 Hachimandai, Tsukuba-shi, Ibaraki 305-0843, Japan
| | - L Yasmin
- Tsukuba Primate Research Center, National Institute of Biomedical Innovation, Health and Nutrition, 1-1 Hachimandai, Tsukuba-shi, Ibaraki 305-0843, Japan
| | - K Yuzawa
- Tsukuba Primate Research Center, National Institute of Biomedical Innovation, Health and Nutrition, 1-1 Hachimandai, Tsukuba-shi, Ibaraki 305-0843, Japan
| | - O Kondoh
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - A Kato
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - M Suzuki
- Research Division, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura-shi, Kanagawa 247-8530, Japan
| | - R Konno
- Department of Obstetrics and Gynecology, Jichi Medical University Saitama Medical Center, 1-847 Amanumacho, Omiya-ku, Saitama-shi, Saitama 330-8503, Japan
| | - T Sankai
- Tsukuba Primate Research Center, National Institute of Biomedical Innovation, Health and Nutrition, 1-1 Hachimandai, Tsukuba-shi, Ibaraki 305-0843, Japan
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Suzuki D, Furukawa K, Furukawa A, Shimizu H, Otsuka M, Kato A, Yoshitomi H, Takayashiki T, Kuboki S, Takano S, Sakai N, Kagawa S, Nojima H, Miyazaki M. SUN-P144: Does the Modified Glasgow Prognostic Score have a Prognostic Role in Gallbladder Cancer? Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30487-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Furukawa A, Furukawa K, Suzuki D, Shimizu H, Ohtsuka M, Kato A, Yoshitomi H, Takayashiki T, Kuboki S, Takano S, Sakai N, Kagawa S, Nojima H, Miyazaki M. MON-P233: Impact of Immunonutrition on Infectious Complications in Sarcopenic Patients Undergoing Pancreaticoduodenectomy. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30867-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Furukawa K, Furukawa A, Suzuki D, Shimizu H, Ohtsuka M, Kato A, Yoshitomi H, Takayashiki T, Kuboki S, Takano S, Sakai N, Kagawa S, Nojima H, Miyazaki M. MON-P236: Influence Of Sarcopenia On Infectious Complications in Patients Undergoing Pancreaticoduodenectomy. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30870-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ogawa K, Miyaji H, Kato A, Kosen Y, Momose T, Yoshida T, Nishida E, Miyata S, Murakami S, Takita H, Fugetsu B, Sugaya T, Kawanami M. Periodontal tissue engineering by nano beta-tricalcium phosphate scaffold and fibroblast growth factor-2 in one-wall infrabony defects of dogs. J Periodontal Res 2016; 51:758-767. [PMID: 27870141 DOI: 10.1111/jre.12352] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND OBJECTIVE Nanoparticle bioceramics are being investigated for biomedical applications. We fabricated a regenerative scaffold comprising type I collagen and beta-tricalcium phosphate (β-TCP) nanoparticles. Fibroblast growth factor-2 (FGF-2) is a bioeffective signaling molecule that stimulates cell proliferation and wound healing. This study examined the effects, on bioactivity, of a nano-β-TCP/collagen scaffold loaded with FGF-2, particularly on periodontal tissue wound healing. MATERIAL AND METHODS Beta-tricalcium phosphate was pulverized into nanosize particles (84 nm) and was then dispersed. A nano-β-TCP scaffold was prepared by coating the surface of a collagen scaffold with a nanosize β-TCP dispersion. Scaffolds were characterized using scanning electron microscopy, compressive testing, cell seeding and rat subcutaneous implant testing. Then, nano-β-TCP scaffold, nano-β-TCP scaffold loaded with FGF-2 and noncoated collagen scaffold were implanted into a dog one-wall infrabony defect model. Histological observations were made at 10 d and 4 wk postsurgery. RESULTS Scanning electron microscopy images show that TCP nanoparticles were attached to collagen fibers. The nano-β-TCP scaffold showed higher compressive strength and cytocompatibility compared with the noncoated collagen scaffold. Rat subcutaneous implant tests showed that the DNA contents of infiltrating cells in the nano-β-TCP scaffold and the FGF-2-loaded scaffold were approximately 2.8-fold and 3.7-fold greater, respectively, than in the collagen scaffold. Histological samples from the periodontal defect model showed about five-fold greater periodontal tissue repair following implantation of the nano-β-TCP scaffold loaded with FGF-2 compared with the collagen scaffold. CONCLUSION The β-TCP nanoparticle coating strongly improved the collagen scaffold bioactivity. Nano-β-TCP scaffolds containing FGF-2 are anticipated for use in periodontal tissue engineering.
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Affiliation(s)
- K Ogawa
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - H Miyaji
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - A Kato
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - Y Kosen
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - T Momose
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - T Yoshida
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - E Nishida
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - S Miyata
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - S Murakami
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - H Takita
- Support Section for Education and Research, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - B Fugetsu
- Nano-Agri Lab, Policy Alternatives Research Institute, The University of Tokyo, Tokyo, Japan
| | - T Sugaya
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | - M Kawanami
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
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Kuramitsu S, Ohno M, Ohka F, Shiina S, Yamamichi A, Kato A, Tanahashi K, Motomura K, Kondo G, Kurimoto M, Senga T, Wakabayashi T, Natsume A. Lenalidomide enhances the function of chimeric antigen receptor T cells against the epidermal growth factor receptor variant III by enhancing immune synapses. Cancer Gene Ther 2015; 22:487-95. [DOI: 10.1038/cgt.2015.47] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 08/14/2015] [Accepted: 08/15/2015] [Indexed: 12/14/2022]
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Wada C, Taji T, Kato A, Sato H, Hatakeyama T, Takeda F, Obara K, Abe E, Kobayashi M, Imota T, Ishihara T, Mamiya S, Toyoshima I. Dysfunction of dorsal visual pathway in myotonic dystrophy type 1. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Poposki JA, Peterson S, Welch K, Schleimer RP, Hulse KE, Peters AT, Norton J, Suh LA, Carter R, Harris KE, Grammer LC, Tan BK, Chandra RK, Conley DB, Kern RC, Kato A. Elevated presence of myeloid dendritic cells in nasal polyps of patients with chronic rhinosinusitis. Clin Exp Allergy 2015; 45:384-93. [PMID: 25469646 DOI: 10.1111/cea.12471] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 11/23/2014] [Accepted: 11/28/2014] [Indexed: 12/14/2022]
Abstract
BACKGROUND Although chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by Th2 inflammation, the mechanism underlying the onset and amplification of this inflammation has not been fully elucidated. Dendritic cells (DCs) are major antigen-presenting cells, central inducers of adaptive immunity and critical regulators of many inflammatory diseases. However, the presence of DCs in CRS, especially in nasal polyps (NPs), has not been extensively studied. OBJECTIVE The objective of this study was to characterize DC subsets in CRS. METHODS We used real-time PCR to assess the expression of mRNA for markers of myeloid DCs (mDCs; CD1c), plasmacytoid DCs (pDCs; CD303) and Langerhans cells (LCs; CD1a, CD207) in uncinate tissue (UT) from controls and patients with CRS as well as in NP. We assayed the presence of DCs by immunohistochemistry and flow cytometry. RESULTS Compared to UT from control subjects (n = 15) and patients with CRS without NP (CRSsNP) (n = 16) and CRSwNP (n = 17), mRNAs for CD1a and CD1c were significantly elevated in NPs (n = 29). In contrast, CD207 mRNA was not elevated in NPs. Immunohistochemistry showed that CD1c(+) cells but not CD303(+) cells were significantly elevated in NPs compared to control subjects or patients with CRSsNP. Flow cytometric analysis showed that CD1a(+) cells in NPs might be a subset of mDC1s and that CD45(+) CD19(-) CD1c(+) CD11c(+) CD141(-) CD303(-) HLA-DR(+) mDC1s and CD45(+) CD19(-) CD11c(+) CD1c(-) CD141(high) HLA-DR(+) mDC2s were significantly elevated in NPs compared to UT from controls and CRSsNP, but CD45(+) CD11c(-) CD303(+) HLA-DR(+) pDCs were only elevated in NPs compared to control UT. CONCLUSION AND CLINICAL RELEVANCE Myeloid DCs are elevated in CRSwNP, especially in NPs. Myeloid DCs thus may indirectly contribute to the inflammation observed in CRSwNP.
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Affiliation(s)
- J A Poposki
- Division of Allergy-Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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Jagadeesh Y, Tran AT, Luo B, Auberger N, Désiré J, Nakagawa S, Kato A, Zhang Y, Sollogoub M, Blériot Y. γ-Aminoalcohol rearrangement applied to pentahydroxylated azepanes provides pyrrolidines epimeric to homoDMDP. Org Biomol Chem 2015; 13:3446-56. [PMID: 25666467 DOI: 10.1039/c5ob00050e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of pentahydroxylated pyrrolidines, displaying five contiguous stereogenic centres and epimeric to α-glucosidase inhibitor homoDMDP, have been synthesized. The key step involves a γ-aminoalcohol rearrangement applied to polyhydroxylated azepanes. These five-membered iminosugars demonstrate micromolar inhibition of glycosidases.
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Affiliation(s)
- Y Jagadeesh
- Glycochemistry Group of "Organic Synthesis" Team, Université de Poitiers, UMR-CNRS 7285 IC2MP, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France.
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Takayama T, Kato A, Dinnebier R, Nuss J, Kono H, Veiga LSI, Fabbris G, Haskel D, Takagi H. Hyperhoneycomb Iridate β-Li2IrO3 as a platform for Kitaev magnetism. Phys Rev Lett 2015; 114:077202. [PMID: 25763972 DOI: 10.1103/physrevlett.114.077202] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Indexed: 06/04/2023]
Abstract
A complex iridium oxide β-Li(2)IrO(3) crystallizes in a hyperhoneycomb structure, a three-dimensional analogue of honeycomb lattice, and is found to be a spin-orbital Mott insulator with J(eff)=1/2 moment. Ir ions are connected to the three neighboring Ir ions via Ir-O(2)-Ir bonding planes, which very likely gives rise to bond-dependent ferromagnetic interactions between the J(eff)=1/2 moments, an essential ingredient of Kitaev model with a spin liquid ground state. Dominant ferromagnetic interaction between J(eff)=1/2 moments is indeed confirmed by the temperature dependence of magnetic susceptibility χ(T) which shows a positive Curie-Weiss temperature θ(CW)∼+40 K. A magnetic ordering with a very small entropy change, likely associated with a noncollinear arrangement of J(eff)=1/2 moments, is observed at T(c)=38 K. With the application of magnetic field to the ordered state, a large moment of more than 0.35 μ(B)/Ir is induced above 3 T, a substantially polarized J(eff)=1/2 state. We argue that the close proximity to ferromagnetism and the presence of large fluctuations evidence that the ground state of hyperhoneycomb β-Li(2)IrO(3) is located in close proximity of a Kitaev spin liquid.
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Affiliation(s)
- T Takayama
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
- Department of Physics and Department of Advanced Materials, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
| | - A Kato
- Department of Physics and Department of Advanced Materials, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
| | - R Dinnebier
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - J Nuss
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - H Kono
- Department of Physics and Department of Advanced Materials, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
| | - L S I Veiga
- Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas, Campinas, São Paulo 13083-859, Brazil
- Laboratório Nacional de Luz Síncrotron, Campinas, São Paulo 13083-970, Brazil
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G Fabbris
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, Washington University, St. Louis, Missouri 63130, USA
| | - D Haskel
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Takagi
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
- Department of Physics and Department of Advanced Materials, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
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Cendret V, Legigan T, Mingot A, Thibaudeau S, Adachi I, Forcella M, Parenti P, Bertrand J, Becq F, Norez C, Désiré J, Kato A, Blériot Y. Synthetic deoxynojirimycin derivatives bearing a thiolated, fluorinated or unsaturated N-alkyl chain: identification of potent α-glucosidase and trehalase inhibitors as well as F508del-CFTR correctors. Org Biomol Chem 2015; 13:10734-44. [DOI: 10.1039/c5ob01526j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthetic DNJs bearing a thiolated, fluorinated or unsaturated N-substituent exhibit trehalase inhibition or F508del-CFTR correction.
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40
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Kato A, Ziegler A, Higuchi N, Nakata K, Nakamura H, Ohno N. Aetiology, incidence and morphology of the C-shaped root canal system and its impact on clinical endodontics. Int Endod J 2014; 47:1012-33. [PMID: 24483229 PMCID: PMC4258081 DOI: 10.1111/iej.12256] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Accepted: 01/27/2014] [Indexed: 01/15/2023]
Abstract
The C-shaped root canal constitutes an unusual root morphology that can be found primarily in mandibular second permanent molars. Due to the complexity of their structure, C-shaped root canal systems may complicate endodontic interventions. A thorough understanding of root canal morphology is therefore imperative for proper diagnosis and successful treatment. This review aims to summarize current knowledge regarding C-shaped roots and root canals, from basic morphology to advanced endodontic procedures. To this end, a systematic search was conducted using the MEDLINE, BIOSIS, Cochrane Library, EMBASE, Google Scholar, Web of Science, PLoS and BioMed Central databases, and many rarely cited articles were included. Furthermore, four interactive 3D models of extracted teeth are introduced that will allow for a better understanding of the complex C-shaped root canal morphology. In addition, the present publication includes an embedded best-practice video showing an exemplary root canal procedure on a tooth with a pronounced C-shaped root canal. The survey of this unusual structure concludes with a number of suggestions concerning future research efforts.
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Affiliation(s)
- A Kato
- Department of Oral Anatomy, School of Dentistry, Aichi Gakuin University, Aichi, Japan
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41
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Suzuki D, Furukawa K, Aida T, Uno H, Miyauchi Y, Shimizu H, Ohtsuka M, Kato A, Yoshitomi H, Takayashiki T, Kuboki S, Takano S, Okamura D, Sakai N, Kagawa S, Miyazaki M. PP022-MON: Effects of Immunonutrition on Postoperative Complication, Stress Responses, and Cell-Mediated Immunity After Pancreaticoduodenectomy: Results from Two Randomized Controlled Studies. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50357-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Kato A, Tanimoto S, Muraki Y, Kobayashi K, Kumagai I. Structural and Functional Properties of Hen Egg-white Lysozyme Deamidated by Protein Engineering. Biosci Biotechnol Biochem 2014; 56:1424-8. [PMID: 1368949 DOI: 10.1271/bbb.56.1424] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The structural and functional properties of lysozymes genetically deamidated at positions 103 (N103D) and 106 (N106D) were studied by a protein engineering technique. The wild-type and mutant lysozymes were expressed in Saccharomyces cerevisiae and purified from the cultivation medium in two steps by cation-exchange chromatography on CM-Toyopearl. The lytic activity of deamidated lysozymes was almost the same as that of wild lysozyme, although the optimal pH of activity was slightly shifted to lower pH by the deamidation. The Gibbs free energy changes of unfolding (delta G) at 20 degrees C for N103D and N106D were almost the same as that of wild-type. On the other hand, the structural flexibility of lysozymes, estimated by protease digestion, was significantly increased by the deamidation. The surface functional properties of deamidated lysozymes were considerably enhanced, compared to those of wild-type lysozyme. These results suggest that structural flexibility is an important governing factor in surface functional properties of proteins, regardless of their structural stability.
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Affiliation(s)
- A Kato
- Department of Biochemistry, Faculty of Agriculture, Yamaguchi University, Japan
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43
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Désiré J, Mondon M, Fontelle N, Nakagawa S, Hirokami Y, Adachi I, Iwaki R, Fleet GWJ, Alonzi DS, Twigg G, Butters TD, Bertrand J, Cendret V, Becq F, Norez C, Marrot J, Kato A, Blériot Y. N- and C-alkylation of seven-membered iminosugars generates potent glucocerebrosidase inhibitors and F508del-CFTR correctors. Org Biomol Chem 2014; 12:8977-96. [DOI: 10.1039/c4ob00325j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and biological evaluation of a library of novel seven-membered iminosugars is reported.
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Affiliation(s)
- J. Désiré
- UMR-CNRS7285
- IC2MP
- Equipe “Synthèse Organique”
- Groupe “Glycochimie”
- Université de Poitiers
| | - M. Mondon
- UMR-CNRS7285
- IC2MP
- Equipe “Synthèse Organique”
- Groupe “Glycochimie”
- Université de Poitiers
| | - N. Fontelle
- UMR-CNRS7285
- IC2MP
- Equipe “Synthèse Organique”
- Groupe “Glycochimie”
- Université de Poitiers
| | - S. Nakagawa
- Department of Hospital Pharmacy
- University of Toyama
- Toyama 930-0194, Japan
| | - Y. Hirokami
- Department of Hospital Pharmacy
- University of Toyama
- Toyama 930-0194, Japan
| | - I. Adachi
- Department of Hospital Pharmacy
- University of Toyama
- Toyama 930-0194, Japan
| | - R. Iwaki
- Department of Hospital Pharmacy
- University of Toyama
- Toyama 930-0194, Japan
| | - G. W. J. Fleet
- Chemistry Research Laboratory
- Oxford University
- Oxford OX1 3TA, UK
| | - D. S. Alonzi
- Oxford Glycobiology Institute
- Department of Biochemistry
- University of Oxford
- Oxford OX1 3QY, UK
| | - G. Twigg
- Oxford Glycobiology Institute
- Department of Biochemistry
- University of Oxford
- Oxford OX1 3QY, UK
| | - T. D. Butters
- Oxford Glycobiology Institute
- Department of Biochemistry
- University of Oxford
- Oxford OX1 3QY, UK
| | - J. Bertrand
- Institut de Physiologie et Biologie Cellulaires
- Université de Poitiers
- FRE 3511 CNRS
- 86022 Poitiers cedex, France
| | - V. Cendret
- UMR-CNRS7285
- IC2MP
- Equipe “Synthèse Organique”
- Groupe “Glycochimie”
- Université de Poitiers
| | - F. Becq
- Institut de Physiologie et Biologie Cellulaires
- Université de Poitiers
- FRE 3511 CNRS
- 86022 Poitiers cedex, France
| | - C. Norez
- Institut de Physiologie et Biologie Cellulaires
- Université de Poitiers
- FRE 3511 CNRS
- 86022 Poitiers cedex, France
| | - J. Marrot
- Institut Lavoisier de Versailles
- UMR CNRS 8180
- 78035 Versailles cedex, France
| | - A. Kato
- Department of Hospital Pharmacy
- University of Toyama
- Toyama 930-0194, Japan
| | - Y. Blériot
- UMR-CNRS7285
- IC2MP
- Equipe “Synthèse Organique”
- Groupe “Glycochimie”
- Université de Poitiers
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Takii T, Namiuchi S, Sugie T, Saji K, Suda A, Kato A. The clinical feature of the acute myocardial infarction patients with admission hyperglycemia. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p4258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Saraya T, Ariga M, Kato A, Goto H. Non-syndromic brachydactyly, known as Shamoji-yubi or Mamushi-yubi in Japan. Case Reports 2013; 2013:bcr-2013-201242. [DOI: 10.1136/bcr-2013-201242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Sugie T, Namiuchi S, Takii T, Kawaguchi T, Saji K, Suda A, Yamaya K, Kato A. Combination of anemia and high B-type natriuretic peptide levels is indicative of in-hospital mortality of patients with acute myocardial infarction. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Namiuchi S, Sugie T, Saji K, Takii T, Kawaguchi T, Suda A, Yamaya K, Kato A. Serum albumin concentration predicts the prognosis of patients with acute decompensated heart failure. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Manabe A, Kashiwase M, Hashimoto T, Hayashida T, Kato A, Hirao K, Shimomura I, Nagashima I. Basic study of alkaline water electrolysis. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.12.105] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kawai Y, Kato A, Nishizawa Y, Kondo E, Saito A, Wakabayashi T, Akaike H, Tanaka T, Nakano T, Ouchi K, Miyashita N. P343 Prevalence of macrolide-resistant Mycoplasma pneumoniae infection in pediatric patients: a multicenter epidemiological study. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70584-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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