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Garcia Ricardez GA, Koganti N, Yang PC, Okada S, Uriguen Eljuri PM, Yasuda A, El Hafi L, Yamamoto M, Takamatsu J, Ogasawara T. Adaptive motion generation using imitation learning and highly compliant end effector for autonomous cleaning. Adv Robot 2019. [DOI: 10.1080/01691864.2019.1698461] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- G. A. Garcia Ricardez
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - N. Koganti
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - P.-C. Yang
- Business Innovation Division, Panasonic Corporation, Osaka, Japan
| | - S. Okada
- Business Innovation Division, Panasonic Corporation, Osaka, Japan
| | - P. M. Uriguen Eljuri
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - A. Yasuda
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - L. El Hafi
- College of Information Science and Engineering, Ritsumeikan University, Kusatsu, Japan
| | - M. Yamamoto
- Business Innovation Division, Panasonic Corporation, Osaka, Japan
| | - J. Takamatsu
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - T. Ogasawara
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
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Garcia Ricardez GA, Okada S, Koganti N, Yasuda A, Uriguen Eljuri PM, Sano T, Yang PC, El Hafi L, Yamamoto M, Takamatsu J, Ogasawara T. Restock and straightening system for retail automation using compliant and mobile manipulation. Adv Robot 2019. [DOI: 10.1080/01691864.2019.1698460] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- G. A. Garcia Ricardez
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - S. Okada
- Business Innovation Division, Panasonic Corporation, Osaka, Japan
| | - N. Koganti
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - A. Yasuda
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - P. M. Uriguen Eljuri
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - T. Sano
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - P.-C. Yang
- Business Innovation Division, Panasonic Corporation, Osaka, Japan
| | - L. El Hafi
- College of Information Science and Engineering, Ritsumeikan University, Kusatsu, Japan
| | - M. Yamamoto
- Business Innovation Division, Panasonic Corporation, Osaka, Japan
| | - J. Takamatsu
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - T. Ogasawara
- Division of Information Science, Nara Institute of Science and Technology, Ikoma, Japan
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Nakazawa R, Azuma N, Suzuki M, Nakatani M, Nankou T, Furuyoshi S, Yasuda A, Takata S, Tani N, Kobayashi F. A New Treatment for Dialysis-Related Amyloidosis with β 2-Microglobulin Adsorbent Column. Int J Artif Organs 2018. [DOI: 10.1177/039139889301601207] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Dialysis-related amyloidosis (DRA) is characterized by the presence of β 2-microglobulin (β 2-m) in the plasma. In order to eliminate β 2-m from the circulating blood, the β 2-m selective adsorbent for direct hemoperfusion (DHP) was developed. A DHP column (BM-01), containing 350 ml of the adsorbent, was subjected to clinical trials. The column was connected with a PAN (AN69) membrane dialyzer in series and used 3 times a week for 1 week (11 patients), 4 weeks (5 patients), 6 months (1 patient) and 12 months (2 patients). The percent reduction (%) of β 2-m was for 16 patients (for 1 or 4 weeks), more than 65, and for 3 patients (for more than 6 months), 76.5 ± 4.9, 73.5 ± 5.7, 72.2 ± 6.2. At the end of each session, β 2-m plasma levels were found to be below 10 mg/L, with 3.4 mg/L being the lowest. The total amounts of β 2-m removed were 172.5 ± 22.3, 257.0 ± 75.6, 157.6 ± 32.2 and 429.8 mg/session at max. Two out of these three patients had a favorable effect on joint symptoms and ocular fundus. It can be concluded that this selective adsorption therapy may delay the progression of DRA, and is worth considering for wide application.
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Affiliation(s)
| | - N. Azuma
- Tokatsu Clinic Hospital, Matsudo
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Uehara H, Shirai T, Yasuda A, Kondo H, Nakayama T, Matsutani N, Kawamura M. P-232PLEURAL CARBON DIOXIDE INSUFFLATION DURING THORACOSCOPIC SURGERY HELPS TO OBTAIN CLEAR THORACOSCOPIC ULTRASONOGRAPHY IMAGES OF SMALL LUNG NODULES: REPORT OF TWO CASES. Interact Cardiovasc Thorac Surg 2017. [DOI: 10.1093/icvts/ivx280.232] [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: 11/14/2022] Open
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Arai K, Takahashi K, Yasuda A, Kanno N, Kohara Y, Michishita M, Harada Y, Hara Y. Denervation-Associated Change in the Palatinus and Levator Veli Palatini Muscles of Dogs with Elongated Soft Palate. J Comp Pathol 2016; 155:199-206. [PMID: 27426002 DOI: 10.1016/j.jcpa.2016.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 04/04/2016] [Revised: 06/08/2016] [Accepted: 06/21/2016] [Indexed: 11/28/2022]
Abstract
Muscle lesions and decreased numbers of peripheral nerve branches have been reported in the soft palates of dogs presenting with brachycephalic airway obstruction syndrome (BAOS). Myosin adenosine triphosphatase staining was employed to investigate whether muscle lesions in the elongated soft palate (ESP) of dogs with BAOS reflect the presence of denervation. Soft palates were collected from nine brachycephalic dogs during surgical intervention for BAOS and from five healthy beagle dogs as controls. In the control soft palates, myofibres with relatively uniform diameters and a random mosaic pattern of type I and II myofibres were observed in the palatinus muscle (PM), while almost all of the myofibres in the levator veli palatini muscle (LVPM) were of type II. In the ESPs, small group atrophy, large group atrophy and angular-shaped atrophy were observed in myofibres of the PM and rarely in the LVPM. Fibre type grouping and an increase in type IIC myofibres were found only in the PM. Morphometric analysis of ESPs revealed a significant increase in the number of type I and II myofibres in the PM showing atrophy or hypertrophy compared with controls. A significant increase in atrophic type II myofibres was found in the LVPM of affected dogs. Myopathy consistent with denervation was observed in the PM, but rarely in the LVPM, of ESP specimens. The results suggest that the myopathy seen in dogs with ESP may partly reflect atrophy of myofibres resulting from damage to peripheral nerve branches, with subsequent reinnervation of myofibres.
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Affiliation(s)
- K Arai
- Laboratory of Veterinary Surgery, Japan; Laboratory of Veterinary Pathology, Japan.
| | | | | | - N Kanno
- Laboratory of Veterinary Surgery, Japan
| | - Y Kohara
- Laboratory of Veterinary Anatomy, Nippon Veterinary and Life Science University, 1-7-1 Kyounan-cho, Musashino, Tokyo, Japan
| | | | - Y Harada
- Laboratory of Veterinary Surgery, Japan
| | - Y Hara
- Laboratory of Veterinary Surgery, Japan
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Seki Y, Yasuda A, Gotou M, Sugiyama T, Yamada K. [Posterior mediastinal hemangioma with extramedullary haematopoieisis]. Kyobu Geka 2012; 65:380-383. [PMID: 22569495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report a very rare coexistence of posterior mediastinal hemangioma with extramedullary haematopoieisis. A 69-year-old woman was detected to have an abnormal mass on the chest radiograph during a routine medical examination. No disorders were found by hematologic exams before and after surgery. Chest computed tomography (CT) revealed a well circumscribed posterior mediastinal tumor measured 32×11 mm in diameter, located on paravertebral space. The most likely diagnosis was a benign neurogenic tumor and we were planning to remove this tumor by video-assisted thoracic surgery (VATS) via a right transthoracic approach. Thoracoscopic finding revealed that this tumor was brownish and soft, such as hemangioma. Initially, incisional biopsy was done to obtain definitive diagnosis. Since intraoperative microscopic examination of the biopsy specimen revealed extramedullary haematopoieisis, we obtained another larger samples and finished the operation. Interestingly, the postoperative final histological diagnosis was mediastinal hemangioma with extramedullary haematopoieis.
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Affiliation(s)
- Y Seki
- Department of Surgery, Nagoya Medical Center, Japan
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Nishida M, Tomita T, Nakashima Y, Wada S, Yamamoto T, Yasuda A, Nishikawa T. P24.7 Topographically enhanced slow spindles in medicated depressive patients. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60614-7] [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: 11/26/2022]
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Hayashi S, Kimura H, Oshiro M, Kato Y, Yasuda A, Suzuki C, Watanabe Y, Morishima T, Hayakawa M. Transmission of cytomegalovirus via breast milk in extremely premature infants. J Perinatol 2011; 31:440-5. [PMID: 21164427 DOI: 10.1038/jp.2010.150] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [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: 11/09/2022]
Abstract
OBJECTIVE We prospectively evaluated the rate of postnatal cytomegalovirus (CMV) transmission through breast milk in extremely premature infants to address the impact of CMV infection on preterm infants during lactation. STUDY DESIGN A total of 25 mothers and 27 infants (two sets of twins) with birth weights <1000 g and/or gestational ages <28 weeks were enrolled in the study. They were mostly fed frozen-thawed breast milk. Breast milk, serum and urine samples were collected every 2 weeks and screened for CMV infection using the real-time polymerase chain reaction. RESULT All of the 21 CMV-seropositive mothers had detectable CMV DNA in their breast milk, with a peak at 4 to 6 weeks postpartum. CMV infection was confirmed in only one infant (4.3%) who displayed almost no clinical symptoms. CONCLUSION At our institutes, we mainly use frozen-thawed breast milk. We found low CMV transmission rates even in extremely premature infants, and the CMV-positive infant did not develop serious symptoms.
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Affiliation(s)
- S Hayashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Japan
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Kaneda H, Onaka T, Sakon I, Ishihara D, Mouri A, Yamagishi M, Yasuda A. PAH evolution in the harsh environment of the ISM. ACTA ACUST UNITED AC 2011. [DOI: 10.1051/eas/1146017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Peng Y, Imano M, Imamoto H, Nishiki K, Nakamori Y, Shiraishi O, Yasuda A, Shinkai M, Yasuda T, Shiozaki H. S-1 and intraperitoneal and intravenous paclitaxel as neoadjuvant chemotherapy for gastric cancer with positive peritoneal cytology. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.142] [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: 11/20/2022] Open
Abstract
142 Background: The prognosis of gastric cancer with positive peritoneal cytology is dismal. Standard treatments for these patients have not been established. The purpose of this study was to evaluate the safety and response of the regimen. Methods: Patients who were diagnosed with advanced gastric cancer between 2007 and 2010 underwent staging laparoscopy and received intraperitoneal paclitaxel when peritoneal cytology were positive and sequential systemic chemotherapy, S-1 combined with intravenous paclitaxel within 14 days after staging laparoscopy. Paclitaxel was administered intraperitoneally at 80 mg/m2. S-1 was administered at 80 mg/m2/day for 14 consecutive days, followed by 7 days rest. Paclitaxel was administered intravenously at 50 mg/m2 on day 1 and day 8. After 2 courses of S-1 combined with paclitaxel were administered, clinical response was assessed by gastroendoscopy and computed tomography. Additional 2 or 3 courses were administered unless progression of disease was proved. Patients who achieved complete response (CR) or partial response (PR) and patients with stable disease (SD) underwent second-look laparoscopy following gastrectomy when peritoneal cytology turned negative. Results: 8 (7 male, 1 female) patients were enrolled: median age was 64 years (range 40-75). Of 8 patients, 1 patient achieved CR, and 5 PR. 2 patients showed progressive disease (PD). Grade 3 neutropenia occurred in 1 patient. 6 patients underwent second-look laparoscopy and peritoneal cytology turned negative in all 6 patients. Total or distal gastrectomy with lymphnode dissection was performed consecutively in 3 or 3 patients, respectively. Median follow-up duration was 775 days (range 187-1,028). No recurrence has not been observed, while the 1-year and 2-year survival rates of 14 patients with peritoneal cytology positive gastric cancer who have not received neoadjuvant chemotherapy were 58.3% and 33.3%, respectively. Conclusions: S-1, intraperitoneal and intravenous paclitaxel as neoadjuvant chemotherapy seems to be a effective strategy against gastric cancer with positive peritoneal cytology. No significant financial relationships to disclose.
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Affiliation(s)
- Y. Peng
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - M. Imano
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - H. Imamoto
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - K. Nishiki
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - Y. Nakamori
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - O. Shiraishi
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - A. Yasuda
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - M. Shinkai
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - T. Yasuda
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
| | - H. Shiozaki
- Department of Surgery, Kinki University, Osakasayama, Japan; Kinki University, Osakasayama, Japan
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Imano M, Imamoto H, Itoh T, Satou T, Peng Y, Yasuda A, Kato H, Nishiki K, Shiraishi O, Shinkai M, Tsubaki M, Yasuda T, Nishida S, Takeyama Y, Okuno K, Shiozaki H. Impact of Intraperitoneal Chemotherapy after Gastrectomy with Positive Cytological Findings in Peritoneal Washings. Eur Surg Res 2011; 47:254-259. [DOI: 10.1159/000333803] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
<i>Background:</i> There is no standard treatment available for gastric cancer patients whose sole ‘non-curative factor’ is positivecytological findings in peritoneal washings (CFPW). The aim of this study was to examine the safety, pharmacokinetics and efficacy for free intraperitoneal cancer cells of intraperitoneal chemotherapy with paclitaxel after gastrectomy with en bloc D2 lymph node dissection in cases of gastric cancer with positive CFPW. <i>Methods:</i> Ten patients with gastric cancer who underwent gastrectomy and systemic lymphadenectomy with D2 dissection, without any other non-curative factors besides positive CFPW, were treated with early postoperative intraperitoneal paclitaxel. Intra-chemotherapeutic toxicity and operative complications were measured using NCI-CTC version 3.0. Intraperitoneal and plasma paclitaxel concentrations were measured using a high-performance liquid chromatographic assay. <i>Results:</i> Grade 3/4 toxic effects included anemia (20%) and neutropenia (10%) that required no treatment. Operative complications were, for example, superficial surgical site infections (10%) that were treated with antibiotics. No viable cancer cells were observed in the intra-abdominal fluid 24 h after intraperitoneal administration of paclitaxel. The intraperitoneal/plasma area under the drug concentration-time curve ratio was 2,003.3:1. <i>Conclusion:</i> Intraperitoneal chemotherapy with paclitaxel is a safe and effective treatment modality for free intraperitoneal cancer cells.
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Yasuda A, Inoue KI, Sanbongi C, Yanagisawa R, Ichinose T, Yoshikawa T, Takano H. Dietary Supplementation with Fructooligosaccharides Attenuates Airway Inflammation Related to House Dust Mite Allergen in Mice. Int J Immunopathol Pharmacol 2010; 23:727-35. [DOI: 10.1177/039463201002300306] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fructooligosaccharides (FOS) are prebiotic supplements that can enhance immunological responses in the host to activate mucosal immunity, probably through regulation of gastrointestinal microflora. An area that has not been investigated, however, is the therapeutic potential of prebiotics on allergic airway diseases. The purpose of this study is to evaluate the effects of dietary supplementation with FOS on a murine model of airway inflammation induced by the house dust mite allergen Dermatophagoides farinae (Der f). Male C3H/HeN mice were intratracheally administered with Der f and were fed a diet containing 0% or 2.5% FOS ad libitum. Supplementation with FOS alleviated mite allergen-related airway inflammation characterized by eosinophilic inflammation and goblet cell hyperplasia, which was evidenced by cytological and histological examinations. In addition, the FOS-supplemented diet reduced the serum allergen-specific IgG1 level as compared with a control diet in the presence of the mite allergen. Moreover, FOS tended to suppress the expression of IL-5 and eotaxin in the lungs, which is enhanced by mite allergen. These results suggest that dietary supplementation with FOS can prevent/improve airway inflammation induced by the mite allergen. This effect can be at least partially associated with the inhibition of allergen-specific Ig production and probably with that of IL-5 and eotaxin expression.
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Affiliation(s)
| | - K-I. Inoue
- School of Pharmacy, Kitasato University, Tokyo
| | | | - R. Yanagisawa
- Environmental Health Sciences Division, National Institute for Environmental Studies, Ibaraki
| | - T. Ichinose
- Department of Health Science, Oita University of Nursing and Health Science, Oita
| | - T. Yoshikawa
- Department of Gastroenterology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - H. Takano
- Environmental Health Sciences Division, National Institute for Environmental Studies, Ibaraki
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Ichinose T, Yoshida S, Hiyoshi K, Sadakane K, Takano H, Nishikawa M, Mori I, Yanagisawa R, Kawazato H, Yasuda A, Shibamoto T. The effects of microbial materials adhered to Asian sand dust on allergic lung inflammation. Arch Environ Contam Toxicol 2008; 55:348-57. [PMID: 18227959 DOI: 10.1007/s00244-007-9128-8] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2007] [Accepted: 12/26/2007] [Indexed: 05/19/2023]
Abstract
Asian sand dust (ASD) containing microbiological materials, sulfate (SO(4)(2)), and nitrate (NO(3)(-) ) derived from air pollutants in East China, reportedly cause adverse respiratory health effects. ASD aggravates ovalbumin (OVA)-associated experimental lung eosinophilia. In this study, the toxic materials adsorbed onto ASD were excluded by heat treatment at 360 degrees C for 30 min. The effects of nonheated ASD or heated ASD (H-ASD) toward the allergic lung inflammation were compared in murine lungs. ICR mice were administered intratracheally with normal saline (control), H-ASD, ASD, OVA, OVA + H-ASD, and OVA + ASD, four times at 2-week intervals. ASD only increased neutrophils in bronchoalveolar lavage fluids (BALFs) along with pro-inflammatory mediators, such as keratinocyte chemoattractant (KC). H-ASD and ASD enhanced eosinophil recruitment induced by OVA in the alveoli and in the submucosa of the airway, which has a goblet cell proliferation in the bronchial epithelium. The two ASDs synergistically increased interleukin-5 (IL-5), monocyte chemotactic protein-3 (MCP-3), and eotaxin, which were associated with OVA, in BALF. The enhancing effects were much greater in ASD than in H-ASD. The two ASDs induced the adjuvant effects to specific IgE and IgG1 production by OVA. In the in vitro study using RAW264.7 cells, ASD increased the expression of Toll-like receptor 2 (TLR 2) mRNA but not TLR4 mRNA. H-ASD caused no expression of either TLR mRNA. These results suggest that the aggravated lung eosinophilia by ASD may be due to activation of Th2-associated immune response via the activation of TLR2 by microbial components adhered to ASD.
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Affiliation(s)
- T Ichinose
- Department of Health Sciences, Oita University of Nursing and Health Sciences, Notsuharu, Oita, Japan
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Yasuda A, Takano H, Osakabe N, Sanbongi C, Fukuda K, Natsume M, Yanagisawa R, Inoue K, Kato Y, Osawa T, Yoshikawa T. Cacao Liquor Proanthocyanidins Inhibit Lung Injury Induced by Diesel Exhaust Particles. Int J Immunopathol Pharmacol 2008; 21:279-88. [DOI: 10.1177/039463200802100204] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Epidemiological and experimental studies have suggested that diesel exhaust particles (DEPs), which generate reactive oxygen species, may be involved in the recent increase in the prevalence of lung diseases. Cacao liquor proanthocyanidins (CPs) are naturally occurring polyphenols with antioxidative activities. We carried out a study in mice to investigate the effects of dietary supplementation of CPs on lung injury induced by intratracheal administration of DEPs (500 μg/body). Dietary supplementation with 1.0% CPs inhibited DEP-induced lung injury, characterized by neutrophil sequestration and edema. Immunohistochemical analyses showed that CPs prevented enhanced expression of vascular cell adhesion molecule-1 and intercellular adhesion molecule-1 caused by DEPs in the lung injury. Numerous adducts of nitrotyrosine, N-(hexanonyl) lysine, 4-hydroxy-2-nonenal, and 8-OHdG were also observed immunohistochemically in the lungs of mice treated with DEPs. However, these indicators of oxidative stress were barely visible in mice pretreated with CP supplementation. In addition, the level of thiobarbituric acid reactive substances in the lung was decreased by CP supplementation in the presence of DEPs. These results suggest that CPs inhibit DEP-induced lung injury by reducing oxidative stress, in association with a reduction in the expression of adhesion molecules.
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Affiliation(s)
| | - H. Takano
- Environmental Health Sciences Division, National Institute for Environmental Studies, Ibaraki
- Infection and Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | | | | | | | - R. Yanagisawa
- Environmental Health Sciences Division, National Institute for Environmental Studies, Ibaraki
| | - K. Inoue
- Environmental Health Sciences Division, National Institute for Environmental Studies, Ibaraki
- Infection and Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Y. Kato
- Laboratories of Food and Biodynamics, Nagoya University Graduate School of Bioagricultural Sciences, Aichi
| | - T. Osawa
- Infection and Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T. Yoshikawa
- School of Humanities for Environmental Policy and Technology, Himeji Institute of Technology, Hyogo
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Moritani S, Ichihara S, Mukai K, Seki Y, Inoue S, Yasuda A, Hakiri S, Yatabe Y, Eimoto T. Sarcomatoid carcinoma of the thymus arising in metaplastic thymoma. Histopathology 2008; 52:409-11. [DOI: 10.1111/j.1365-2559.2007.02960.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
AIMS The aim of this work was to observe bacteria associated with the spores of Gigaspora margarita, an arbuscular mycorrhizal fungus (AMF). METHODS AND RESULTS First, a direct analysis of DNA from sterilized spores indicated the bacteria belonging to the genus Janthinobacterium. In the second assay, two bacterial strains were isolated by osmosis from protoplasts, which were derived from spores by using two particular enzymes: lysing enzymes and yatalase. After isolation, cultivation and identification by their DNA as performed in the first experiment, the species with the closest relation were Janthinobacterium lividum (KCIGM01) and Paenibacillus polymyxa (KCIGM04) isolated with lysing enzymes and yatalase respectively. Morphologically, J. lividum was Gram negative and oval, while P. polymyxa was also oval, but Gram positive. Both strains had antagonistic effects to the pathogenic fungi Rosellimia necatrix, Pythium ultimum, Fusarium oxysporum and Rhizoctonia solani. In particular, J. lividum was much stronger in this role. However, in phosphorus (P) solubilization P. polymyxa functioned better than J. lividum. CONCLUSIONS This experiment had revealed two new bacteria species (P. polymyxa and J. lividum), associated with AMF spores, which functioned to suppress diseases and to solubilize P. SIGNIFICANCE AND IMPACT OF THE STUDY AMF spores could be a useful source for bacterial antagonists to soil-borne diseases and P solubilization.
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Affiliation(s)
- A F Cruz
- Graduate School of Agriculture, Kyoto Prefectural University, Sakyo-ku, Kyoto, Japan.
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Polanska MA, Yasuda A, Harzsch S. Immunolocalisation of crustacean-SIFamide in the median brain and eyestalk neuropils of the marbled crayfish. Cell Tissue Res 2007; 330:331-44. [PMID: 17828557 DOI: 10.1007/s00441-007-0473-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Accepted: 07/11/2007] [Indexed: 11/29/2022]
Abstract
Crustacean-SIFamide (GYRKPPFNGSIFamide) is a novel neuropeptide that was recently isolated from crayfish nervous tissue. We mapped the localisation of this peptide in the median brain and eyestalk neuropils of the marbled crayfish (Marmorkrebs), a parthenogenetic crustacean. Our experiments showed that crustacean-SIFamide is strongly expressed in all major compartments of the crayfish brain, including all three optic neuropils, the lateral protocerebrum with the hemiellipsoid body, and the medial protocerebrum with the central complex. These findings imply a role of this peptide in visual processing already at the level of the lamina but also at the level of the deeper relay stations. Immunolabelling is particularly strong in the accessory lobes and the deutocerebral olfactory lobes that receive a chemosensory input from the first antennae. Most cells of the olfactory globular tract, a projection neuron pathway that links deuto- and protocerebrum, are labelled. This pathway plays a central role in conveying tactile and olfactory stimuli to the lateral protocerebrum, where this input converges with optic information. Weak labelling is also present in the tritocerebrum that is associated with the mechanosensory second antennae. Taken together, we suggest an important role of crustacean-SIFamidergic neurons in processing high-order, multimodal input in the crayfish brain.
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Affiliation(s)
- M A Polanska
- Institute of Infectious Diseases, Medical University of Warsaw, Warsaw, 02-106, Poland.
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Dürr M, Rosselli S, Yasuda A, Nelles G. 2006 Volume 110B Band-Gap Engineering of Metal Oxides for Dye-Sensitized Solar Cells. J Phys Chem B 2006. [DOI: 10.1021/jp068105x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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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Abstract
Mixed oxides Ti(1-x)Zr(x)O2 with 0 < x < or = 0.2 were synthesized by means of thermal hydrolysis for use in dye-sensitized solar cells. The lattice parameter d is observed to increase linearly with Zr content x. The band gap of the mixed oxides was measured to increase by up to 0.2 eV. The respective shift of the conduction band edge leads to an increase of the open circuit voltage (V(OC)) by up to 0.1 V. Among others, temperature-dependent measurements of V(OC) clearly identify the correlation between band edge shift and change in V(OC).
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Affiliation(s)
- M Dürr
- Materials Science Laboratory, Sony Deutschland GmbH, 70327 Stuttgart, Germany. [corrected]
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22
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Baluschev S, Miteva T, Yakutkin V, Nelles G, Yasuda A, Wegner G. Up-conversion fluorescence: noncoherent excitation by sunlight. Phys Rev Lett 2006; 97:143903. [PMID: 17155253 DOI: 10.1103/physrevlett.97.143903] [Citation(s) in RCA: 246] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Indexed: 05/12/2023]
Abstract
We demonstrate up-conversion of noncoherent sunlight realized by ultralow excitation intensity. The bimolecular up-conversion process in our systems relies on the presence of a metastable triplet excited state, and thus has dramatically different photophysical characteristics relative to the other known methods for photon up-conversion (two-photon absorption, parametric processes, second harmonic generation, sequential multiphoton absorption, etc.).
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Affiliation(s)
- S Baluschev
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
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23
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Morikawa T, Shirai E, Tanno J, Takanashi H, Yasuda A, Itoh K. Time-resolved Total Internal Reflection Raman Scattering Study on Electric-Field-Induced Reorientation Dynamics of Nematic Liquid Crystal of 4-Hexyl-4′-Cyanobiphenyl. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259808042432] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- T. Morikawa
- a Department of Chemistry , School of Science and Engineering, Waseda University , Shinjuku-ku, Tokyo , 169 , Japan
| | - E. Shirai
- a Department of Chemistry , School of Science and Engineering, Waseda University , Shinjuku-ku, Tokyo , 169 , Japan
| | - J. Tanno
- a Department of Chemistry , School of Science and Engineering, Waseda University , Shinjuku-ku, Tokyo , 169 , Japan
| | - H. Takanashi
- b Sony Corporation Research Center , Fujizuka-cho, Hodogaya-ku, Yokohama , 240 , Japan
| | - A. Yasuda
- b Sony Corporation Research Center , Fujizuka-cho, Hodogaya-ku, Yokohama , 240 , Japan
| | - K. Itoh
- a Department of Chemistry , School of Science and Engineering, Waseda University , Shinjuku-ku, Tokyo , 169 , Japan
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Itou S, Imai T, Usami N, Uchiyama M, Yasuda A, Kawaguchi K, Yokoi K. [Surgical treatment for adrenal metastasis from lung cancer]. Kyobu Geka 2006; 59:47-52. [PMID: 16440685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Several long-term survivors after surgical resection for a solitary adrenal metastasis from non-small cell lung cancer (NSCLC) have been reported in case reports and case series with a small number of patients. We have experienced 6 cases of patients who had adrenalectomy (ADR) for a metastasis from NSCLC. The median survival time (MST) after ADR was 24 months, and there was only 1 case of 3-year survivor. To elucidate the surgical indication and the prognostic factors of patients with a solitary adrenal metastasis from NSCLC, we analyzed 104 patients including our 6 patients who had ADR for a metastasis from NSCLC. The MST after ADR and 5-year survival were 24 months and 31%, respectively. Univariate and multivariate analysis demonstrated that lymph node metastasis at the surgery for primary lung cancer was the only significant and independent predictor of poor survival in patients after ADR. The results suggest that aggressive surgical treatment of a solitary adrenal metastasis from NSCLC may be effective when a patient have N0 disease.
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Affiliation(s)
- S Itou
- Division of General Thoracic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Abstract
The adsorption of ruthenium-dye molecules out of ethanol solution onto TiO2 particles of nanoporous TiO2 films was used to study the molecules' diffusion through these layers by means of optical absorption spectrometry. Dependent on pore size, porosity, and particle size, effective diffusion constants as low as D(eff) = 4 x 10(-9) cm2/s were deduced from the uptake curves by applying a simple model for combined diffusion and adsorption. These diffusion constants for diffusion through the nanoporous network are up to 3 orders of magnitude lower than in bulk ethanol and are discussed with respect to the properties of the nanoporous material.
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Affiliation(s)
- M Dürr
- Materials Science Laboratory, Sony Deutschland GmbH, 70327 Stuttgart, Germany.
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Abstract
Colloidal gold nanoparticles are investigated as a potential scaffold for the assisted immobilisation of probe oligonucleotides on silicon surfaces. A preliminary study is devoted to the examination of the immobilisation of DNA-modified gold nanoparticles as a function of time, concentration, salt and pH. The DNA-modified nanoparticles self-assembled onto solid surfaces in a three-dimensional self-assembled architecture. The functionalised surfaces are evaluated in diagnostic assays, where their potential to improve the efficiency of the hybridisation reaction is tested. The system utilising DNA-modified nanoparticles produced an enhancement in the hybridisation efficiency and the sensitivity limit by a factor 10 to 100 as compared to a conventional DNA immobilisation system on a planar surface.
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Affiliation(s)
- C Minard-Basquin
- Stuttgart Technology Center, Materials Science Laboratory, Sony Deutscheland (GmbH), D-70327 Stuttgart, Germany.
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Ohmori K, Yamada H, Yasuda A, Yamamoto A, Matsuura N, Kiniwa M. Effects of a novel antihyperlipidemic agent, S-2E, on the blood lipid abnormalities in homozygous WHHL rabbits. Metabolism 2004; 53:680-5. [PMID: 15131777 DOI: 10.1016/j.metabol.2003.11.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To improve mixed hyperlipidemia in the low-density lipoprotein (LDL) receptor-deficient state, suppression of very-low-density lipoprotein (VLDL) particle production may be an important approach. We previously reported that S-2E, (+)-(S)-p-[1-(p-tert-butylphenyl)-2-oxo-4-pyrrolidinyl] methoxybenzoic acid, suppressed VLDL particle production by inhibiting the biosynthesis of both sterol and fatty acids in the liver. We therefore examined whether S-2E lowered the blood cholesterol and triglyceride (TG) levels simultaneously in homozygous Watanabe heritable hyperlipidemic (WHHL) rabbits, which correspond to human familial hypercholesterolemia. S-2E given orally at doses of 30 to 300 mg/kg significantly lowered serum total cholesterol (TC) levels at 1 week as well as TG at 2 weeks, and the lowering of TC and TG levels by S-2E reached a maximum at 3 to 4 weeks. In contrast, oral administration of pravastatin at doses of 10 to 100 mg/kg resulted in a significant suppression of TC levels (100 mg/kg) but not TG levels. Further analysis of the TC content in fractionated serum of control and S-2E-treated animals showed that suppression of TC level by S-2E is attributable to a decrease in the proportions of VLDL, intermediate-density lipoprotein (IDL), and LDL. It is, therefore, reasonable to assume that S-2E may be useful to improve the blood lipid abnormalities in the LDL receptor-deficient state.
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Affiliation(s)
- K Ohmori
- Pharmacology Research Laboratory, Taiho Pharmaceutical Co, Ltd, Hanno, Japan
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Baba S, Osakabe N, Natsume M, Yasuda A, Muto Y, Hiyoshi K, Takano H, Yoshikawa T, Terao J. Absorption, metabolism, degradation and urinary excretion of rosmarinic acid after intake of Perilla frutescens extract in humans. Eur J Nutr 2004. [DOI: 10.1007/s00394-004-0524-9] [Citation(s) in RCA: 4] [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: 11/24/2022]
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Dürr M, Kron G, Rau U, Werner JH, Yasuda A, Nelles G. Diffusion-limited transport of I[sub 3][sup −] through nanoporous TiO[sub 2]-polymer gel networks. J Chem Phys 2004; 121:11374-8. [PMID: 15634095 DOI: 10.1063/1.1812741] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Tri-iodide transport in a polymer gel electrolyte embedded in nanoporous TiO(2) networks and its diffusion limits are investigated by means of current-voltage (I-V) characteristics of simple Pt-gel-Pt sandwich devices with a thin porous TiO(2) layer sintered directly onto one of the Pt electrodes. At voltages between 0.2 and 0.7 V, the I-V curves of such devices show the typical plateau of diffusion-limited redox reactions, in this case I(-)/I(3) (-), at the platinum electrodes. From the dependence of the limiting current density on layer thickness, the diffusion constants D(bulk) and D(p,eff) of tri-iodide in the bulk polymer gel and through a polymer gel penetrated TiO(2) network, respectively, have been found to be D(bulk)=3.2(+/-0.2)x10(-6) cm(2)/s and D(p,eff)=1.5(+/-0.1)x10(-6) cm(2)/s. Temperature-dependent measurements show diffusion in the gel to be activated by about 0.16 eV. The results are discussed in comparison to diffusion in liquid electrolytes as well as with respect to the implications for dye-sensitized solar cell devices.
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Affiliation(s)
- M Dürr
- Materials Science Laboratories, Sony International (Europe) GmbH, 70327 Stuttgart, Germany.
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Lauer L, Vogt AK, Kauff C, Nelles G, Yasuda A, Knoll W, Offenhäusser A. Analysis of electrotonic coupling in patterned neuronal networks. ACTA ACUST UNITED AC 2004; 151:122-7. [PMID: 16475854 DOI: 10.1049/ip-nbt:20040776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Microcontact printing of laminin is known as an efficient approach for guiding neuronal cell migration and neurite outgrowth on artificial surfaces. In the present study, ultrathin (approximately 250 microm) brain stem slices of Sprague-Dawley rats (E15-E18) were cultured on laminin-patterned substrates, such that neuronal cells migrating out of the slices formed grid-shaped neuronal networks along the geometry defined by the pattern. The interconnections between neighbouring pairs of neurons within these artificial networks were assessed electrophysiologically by double patch-clamp recordings and optically by microinjection of fluorescent dyes. Both functional and electrotonic synapses were detected. Based on the recorded data and simulations in PSpice, an electrical model for electrotonically coupled cells was derived. In this model the neuritic pathway is described as a cylindric cable, and gap junctions are represented by an ohmic resistor. Applying this model in the data analysis, the average inner radius of neurites could be determined to be approximately 0.1 microm. In addition, evidence was found for a correlation between the path-width of the applied pattern and the diameter of neurites growing along these paths.
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Affiliation(s)
- L Lauer
- Max Planck Institute for Polymer Research, Mainz, Germany
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31
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Kawakoshi A, Hyodo S, Yasuda A, Takei Y. A single and novel natriuretic peptide is expressed in the heart and brain of the most primitive vertebrate, the hagfish (Eptatretus burgeri). J Mol Endocrinol 2003; 31:209-20. [PMID: 12914537 DOI: 10.1677/jme.0.0310209] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In teleost fish and tetrapods, the natriuretic peptide (NP) family consists of ANP (atrial natriuretic peptide), BNP (brain natriuretic peptide) and VNP (ventricular natriuretic peptide) that are secreted from the heart, and C-type natriuretic peptide (CNP) that is found in the brain. However, CNP is the only NP identified in the heart and brain of elasmobranchs, suggesting that it is the ancestral type of the NP family and that ANP, BNP and VNP appeared later in the vertebrate phylogeny. To delineate more clearly the molecular evolution of this hormone family, we determined the sequence of NP molecule(s) in evolutionarily the oldest vertebrate group, the cyclostomes. We have cloned a novel NP cDNA from the heart and brain of hagfish, Eptatretus burgeri, using the RACE method and degenerate primers that amplify all known types of NP cDNAs. The novel NP, named EbuNP after the scientific name of this hagfish, appears to be the only NP in the heart and brain, as no other NP cDNAs were amplified even after specific removal of the cloned EbuNP mRNA from the mRNA pool, except for a minor alternatively spliced EbuNP cDNA with a truncated 3'-untranslated sequence. The EbuNP was equally similar to known NPs but was not considered to be a CNP because of the presence of a C-terminal tail sequence. The EbuNP gene was abundantly expressed in the cardiac atrium, ventricle, portal heart and brain but scarcely in the intestine; no expression was observed in the gill and kidney. Mass spectrometry of affinity-purified EbuNP in plasma, heart and brain revealed a 68 amino acid peptide circulating in the blood and stored in the heart, which is cleaved at the typical cleavage signal of a processing enzyme, furin, as observed in mammalian BNP. The C-terminal Gly residue was used for amidation as is the case in eel ANP. The immunoreactive EbuNP was not detected in the brain, suggesting the presence of a different processing form in the brain. These results show that the molecular evolution of the NP family in vertebrates is more complex than previously thought.
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Affiliation(s)
- A Kawakoshi
- Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan.
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Hayakawa M, Kimura H, Ohshiro M, Kato Y, Fukami E, Yasuda A, Okumura A, Morishima T. Varicella exposure in a neonatal medical centre: successful prophylaxis with oral acyclovir. J Hosp Infect 2003; 54:212-5. [PMID: 12855237 DOI: 10.1016/s0195-6701(03)00144-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [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: 11/23/2022]
Abstract
In December 2000, a female infant hospitalized in our Neonatal Care Centre was infected with varicella by her mother. Although prophylactic intravenous acyclovir was administered at a dose of 15 mg/kg daily, she later developed varicella during her hospital stay. We therefore initiated control procedures to prevent further hospital-acquired infections. Oral acyclovir (40 mg/kg daily divided into four doses) was administered prophylactically to six preterm infants in contact with the varicella patient. None of six preterm infants subsequently developed clinical varicella or had any adverse effects associated with acyclovir administration. It is suggested that prophylactic administration of oral acyclovir (40 mg/kg daily) might prevent hospital-acquired varicella-zoster virus (VZV) infections, and that oral acyclovir may be an option for VZV prophylaxis in situations where VZV immunoglobulin is not available.
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Affiliation(s)
- M Hayakawa
- Department of Pediatric Cardiology and Neonatology, Ogaki Municipal Hospital, Ogaki, Japan.
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Takeuchi H, Yasuda A, Yasuda-Kamatani Y, Kubo T, Nakajima T. Identification of a tachykinin-related neuropeptide from the honeybee brain using direct MALDI-TOF MS and its gene expression in worker, queen and drone heads. Insect Mol Biol 2003; 12:291-298. [PMID: 12752663 DOI: 10.1046/j.1365-2583.2003.00414.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Using a combination of MALDI-TOF and on-line capillary HPLC/Q-Tof mass spectroscopy, we identified and determined the amino acid sequence of a novel neuropeptide in the brain of the honeybee Apis mellifera L., termed AmTRP peptide (Apis mellifera tachykinin-related peptide), related to insect tachykinin. A cDNA for a prepro-protein (prepro-AmTRP) of AmTRP was isolated and determined to encode seven AmTRPs 1-7. Northern blot analysis indicated that the prepro-AmTRP gene is expressed differentially in the nurse bee, forager, queen and drone heads. Strong expression was detected in the queen and forager heads, while weak and almost no significant expression was detected in the nurse and drone heads, respectively. These results suggest that AmTRP peptide functions as a neuromodulator and/or hormone, associated with sex-specific or age/division of labour-selective behaviour and/or physiology of the honeybees.
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Affiliation(s)
- H Takeuchi
- Bio-orientated Technology Research Advancement Institution, Toranomon, Minato-ku, Tokyo, Japan
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34
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Blinov LM, Pozhidaev EP, Podgornov FV, Pikin SA, Palto SP, Sinha A, Yasuda A, Hashimoto S, Haase W. "Thresholdless" hysteresis-free switching as an apparent phenomenon of surface stabilized ferroelectric liquid crystal cells. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:021701. [PMID: 12241190 DOI: 10.1103/physreve.66.021701] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2001] [Revised: 04/08/2002] [Indexed: 05/23/2023]
Abstract
The thresholdless, hysteresis-free V-shape electro-optical switching in surface-stabilized ferroelectric liquid crystals, observed usually with a triangular voltage form, has been shown to be rather an apparent and not a real effect. Strictly speaking, it is observed only at one characteristic frequency f(i) and is accompanied by an inversion of the electro-optical hysteresis direction from the normal to the abnormal one. The switching of the director in a liquid crystal layer at f(i), in reality, has a threshold and a normal hysteresis. Even the optical transmittance shows a hysteresis at f(i) when it is plotted as a function of the voltage on the liquid crystal layer and not as a function of the total voltage on the liquid crystal cell which always includes the inner insulating layers. Due to these layers, a voltage divider is formed which includes the capacitance of the insulating layers and the dynamic impedance (capacitance and resistance) of the ferroelectric liquid crystal layer. The new explanation has been confirmed by experiments with different ferroelectric liquid crystal cells combined with external resistors and capacitors and by measurements of a strong dependence of f(i) on the liquid crystal resistance which was varied over three orders of magnitude. A theoretical analysis of the problem has also been made using certain approximations for material parameters and the space dependence of the sine form of the electric field in the liquid crystal layer. The conclusions are qualitatively consistent with the experimental results. Finally, the dynamic problem has been solved numerically by taking into account of all the relevant parameters (in the absence of flow and irregularities in the cell plane) and the obtained results are in excellent correspondence with the experiment. This has been demonstrated for sets of material and cell parameters providing the best V-shape performance.
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Affiliation(s)
- L M Blinov
- Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287 Darmstadt, Germany
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Miyashita A, Yasuda A, Takaya H, Toriumi K, Ito T, Souchi T, Noyori R. Synthesis of 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (BINAP), an atropisomeric chiral bis(triaryl)phosphine, and its use in the rhodium(I)-catalyzed asymmetric hydrogenation of .alpha.-(acylamino)acrylic acids. J Am Chem Soc 2002. [DOI: 10.1021/ja00547a020] [Citation(s) in RCA: 803] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Sakai M, Yamaguchi T, Watanuki H, Yasuda A, Takahashi A. Modulation of fish phagocytic cells by N-terminal peptides of proopiomelanocortin (NPP). J Exp Zool 2001; 290:341-6. [PMID: 11550181 DOI: 10.1002/jez.1074] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
N-terminal peptide of proopiomelanocortin (NPP, or pro-gamma-MSH) has shown to exhibit biological activity such as stimulation of adrenal mitogenesis and prolactin release-inhibiting factor activity. Structurally, studies reveal a significant difference between fish NPP from that of tetrapods, as NPPs from carp and salmonid lack gamma-MSH. Thus, fish NPP may exhibit functions different from that of mammals. The activation of phagocytic cells by NPP was analysed using rainbow trout Oncorhynchus mykiss and carp Cyprinus carpio. Rainbow trout and carp macrophages incubated with chum salmon NPP significantly enhanced the production of superoxide anion in comparison with control macrophages (without hormones). Both rainbow trout and carp macrophages had shown increased phagocytosis when stimulated administered with NPP. The above results were complemented by in vivo studies where NPP was administered to rainbow trout and carp. NPP significantly increased superoxide anion production as well as phagocytosis in macrophages. These results show that NPP in lower vertebrates activates the function of the phagocytic cells.
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Affiliation(s)
- M Sakai
- Faculty of Agriculture, Miyazaki University, Miyazaki, 889-2192, Japan.
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Obata M, Imamura E, Yoshida Y, Goto J, Kishibe K, Yasuda A, Ogawa K. Resistance of primary cultured mouse hepatic tumor cells to cellular senescence despite expression of p16(Ink4a), p19(Arf), p53, and p21(Waf1/Cip1). Mol Carcinog 2001; 32:9-18. [PMID: 11568971 DOI: 10.1002/mc.1059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 12/27/2022]
Abstract
Primary cultured mouse hepatic cells become senescent within a short period, although rare cells form colonies from which continuously proliferating cell lines can be established. In contrast, hepatic tumor (HT) cells show little senescence and higher colony-forming capacity. To assess this difference, we investigated p16(Ink4a)/p19(Arf)/p53/p21(Waf1/Cip1) expression in primary normal and HT cells, together with cell lines established from both. In primary normal cells, p16(Ink4a)/p19(Arf) were expressed only in association with senescence and disappeared at later stages of colony formation. In contrast, primary HT cells showed sustained p16(Ink4a)/p19(Arf) expression from the beginning. No p16(Ink4a)/p19(Arf) alterations, such as deletion, mutations, or hypermethylation, were detected in the primary HT cells, although most cell lines derived from either normal or HT cell colonies lost p16(Ink4a) or p19(Arf) expression owing to hypermethylation or homozygous deletion of p16(Ink4a)/p19(Arf). On the other hand, primary normal and HT cells and most cell lines showed constitutively elevated expression of p53/p21(Waf1/Cip1), with a further increment after ultraviolet ir-radiation, indicating a functionally normal p53 pathway. These results indicate that primary HT cells are resistant to senescence despite retaining p16(Ink4a)/p19(Arf)/p53/p21(Waf1/Cip1) expression and that loss of p16(Ink4a)/p19(Arf) function is associated only with establishment of the cell lines.
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Affiliation(s)
- M Obata
- Department of Pathology, Asahikawa Medical College, Asahikawa, Japan
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Dai L, Yasuda A, Naoki H, Corzo G, Andriantsiferana M, Nakajima T. IsCT, a novel cytotoxic linear peptide from scorpion Opisthacanthus madagascariensis. Biochem Biophys Res Commun 2001; 286:820-5. [PMID: 11520071 DOI: 10.1006/bbrc.2001.5472] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [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: 11/22/2022]
Abstract
A novel cytotoxic linear peptide, IsCT, was characterized from scorpion Opisthacanthus madagascariensis. It is a linear peptide with a molecular weight of 1501.9 Da composed of 13 amino acid residues without cysteines. MS/MS analysis showed that its C-terminal is amidated. The identity of IsCT is re-confirmed by comparing the chemical synthesized peptide with the natural one. IsCT demonstrated antimicrobial activity against both gram-positive and gram-negative bacteria and hemolytic activity to sheep red blood cells. Also, it can release histamine from rat peritoneal mast cells. The CD absorption suggested that IsCT had an alpha-helix configuration in aqueous TFE. IsCT is one of the shortest natural cytotoxic peptides described, and it will be a suitable model for studying peptide-lipid interactions.
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Affiliation(s)
- L Dai
- Suntory Institute for Bioorganic Research, Shimamoto, Osaka 618-8503, Japan.
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Maruta K, Nukaga K, Yasuda A, Katakami T, Kohata Y, Shimizu N, Igawa M, Miyaoka M, Moriyasu F, Saito M, Kato H. [A case of metastatic ileal cancer from the lung diagnosed endoscopically]. Nihon Shokakibyo Gakkai Zasshi 2001; 98:832-6. [PMID: 11510086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- K Maruta
- 4th Department of Internal Medicine, Tokyo Medical University
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Abstract
In a study of 142 Japanese men from a cross-section of the workforce of a technology development company, we found that the percentage of CD56+ cells was inversely correlated with the number of hours worked per week. A low CD56+ cell percentage was associated with longer weekly working hours and shorter daily sleeping hours.
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Affiliation(s)
- A Yasuda
- Division of Hazard Assessment, National Institute of Industrial Health, Kawasaki, Japan
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Osakabe N, Baba S, Yasuda A, Iwamoto T, Kamiyama M, Takizawa T, Itakura H, Kondo K. Daily cocoa intake reduces the susceptibility of low-density lipoprotein to oxidation as demonstrated in healthy human volunteers. Free Radic Res 2001; 34:93-9. [PMID: 11235000 DOI: 10.1080/10715760100300091] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.3] [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: 10/24/2022]
Abstract
Nine male volunteers were given 36 g of cocoa powder (containing 2610 mg of polyphenols) per day with sugar and 6 volunteers received an equivalent amount of sugar for 2 weeks. Conjugated diene production in LDL induced by 2-2' azobis(4-methoxy-2,4-dimethylvaleronitrile) (V-70) and copper ion were evaluated. The lag time was significantly prolonged at 1 and 2 weeks in V-70 and at 2 weeks in copper ion after cocoa powder consumption. The level of excretion of epicatechin in urine was significantly higher in the cocoa group than that in the control group. In conclusion, the antioxidants in cocoa powder might be absorbed and increase the resistance of human LDL to oxidation.
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Affiliation(s)
- N Osakabe
- Functional Food Research and Development Laboratory, Meiji Seika Kaisha Ltd., Chiyoda Sakado, Japan.
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Yoshimatsu Y, Yoshimatsu J, Narahara H, Yasuda A, Miyakawa I. Platelet-activating factor-induced intracellular calcium waves in human uterine myometrial cells. Eur J Obstet Gynecol Reprod Biol 2000; 93:147-50. [PMID: 11074135 DOI: 10.1016/s0301-2115(00)00293-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 10/18/2022]
Abstract
OBJECTIVE We visualized and investigated the intracellular calcium waves propagated by platelet-activating factor (PAF) in cultured human myometrial cells. STUDY DESIGN Myometrial cells were stimulated with PAF ranging between 10(-8) and 10(-15) M. For the observation of calcium waves, calcium green-1 and a confocal laser microscopy were used. Cells were also stimulated with 10(-9) M of PAF in a calcium-free solution. RESULTS In physiological solution, PAF at concentrations ranging between 10(-9) and 10(-15) M induced intracellular calcium waves. Mean wave speed was 16.1+/-5.6 microm/s. Wave speeds were independent of the PAF concentration. Similar results were observed in the absence of added calcium, with the exception that the wave speeds were significantly slower (7.3+/-3.3 microm/s). CONCLUSIONS This is the first study to demonstrate the calcium waves propagated by PAF stimulation in human myometrial cells. These observations further support the proposed role of PAF in parturition.
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Affiliation(s)
- Y Yoshimatsu
- Department of Obstetrics and Gynecology, Oita Medical University, Idaigaoka 1-1, Hasama, Oita 879-5593, Japan
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Yasuda A, Ohkoshi K, Orihara Y, Kusano Y, Sakuma A, Yamaguchi T. Spontaneous luxation of encapsulated intraocular lens onto the retina after a triple procedure of vitrectomy, phacoemulsification, and intraocular lens implantation. Am J Ophthalmol 2000; 130:836-7. [PMID: 11124310 DOI: 10.1016/s0002-9394(00)00630-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 11/27/2022]
Abstract
PURPOSE To report the clinical and histological findings of a luxated intraocular lens (IOL) in the capsular bag. METHODS Review of a case. RESULTS Twenty-three months after a triple procedure of vitrectomy, phacoemulsification, and IOL implantation for diabetic vitreous hemorrhage and cataract, the encapsulated IOL spontaneously luxated. Scanning electron microscopy showed sparsely distributed anterior and equatorial zonules, with only a few posterior zonules on the surface of the removed capusular bag. CONCLUSION The absence of the anterior hyaloid membrane and posterior zonules and contraction of the lens capsule may cause dialysis of the zonules. Therefore, the anterior hyaloid membrane should be left in place in patients at low risk for the development of postoperative proliferation to maintain the long-term stability of the IOL.
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Affiliation(s)
- A Yasuda
- Department of Ophthalmology, St. Luke's International Hospital, Tokyo, Japan.
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Akino K, Ohtsuru A, Kanda K, Yasuda A, Yamamoto T, Akino Y, Naito S, Kurokawa M, Iwahori N, Yamashita S. Parathyroid hormone-related peptide is a potent tumor angiogenic factor. Endocrinology 2000; 141:4313-6. [PMID: 11089567 DOI: 10.1210/endo.141.11.7875] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Rat pituitary malignant tumor cells; mGH3, show hypervascularization in in vivo xenografts and overexpress parathyroid hormone-related peptide (PTHrP) compared to original GH3 cells. To elucidate whether PTHrP is involved in tumor-derived angiogenesis, we examined the effect of PTHrP on vascular endothelial cells both in vitro and in vivo. Results of in vivo diffusion chamber assay showed a clear hypervascularization on the outer surface of diffusion chambers containing mGH3 tumor cell implants but not in those containing GH3 cells. Co-incubation with antisense PTHrP oligonucleotide (10 microM), but not sense or mismatched PTHrP oligonucleotide, suppressed hypervascularization in diffusion chambers. To further examine the role of PTHrP on endothelial cell function, PTHrP(1-34) was added at various concentrations to cultured bovine endothelial cells (BAECs) harvested from the aorta. PTHrP(1-34) did not alter the proliferation or migration of endothelial cells, but rather dose-dependently increased capillary formation by endothelial cells on the collagen gel matrix. Furthermore, 0.1 mM of 8-bromo-cAMP caused a similar increase in tube formation, which was dose-dependently inhibited by H89, a protein kinase A inhibitor. Our results indicate for the first time that PTHrP is a potential paracrine factor acting via the PKA pathway to enhance angiogenesis through capillary tube formation by endothelial cells in malignant pituitary tumors.
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Affiliation(s)
- K Akino
- Department of Anatomy, Nagasaki University School of Medicine, Japan
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Baba S, Osakabe N, Natsume M, Yasuda A, Takizawa T, Nakamura T, Terao J. Cocoa powder enhances the level of antioxidative activity in rat plasma. Br J Nutr 2000; 84:673-80. [PMID: 11177180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The aims of the present study were to determine the level of (-)-epicatechin (EC) and its metabolites in rat plasma after oral administration of cocoa powder and to evaluate the protective effect of cocoa powder in terms of suppressing the oxidation of plasma components. Rats were orally administered 1 g cocoa powder/kg body weight, containing 7.80 mg EC, and their blood was collected before administration and at designated time intervals thereafter. The EC and its metabolites in plasma were treated with beta-glucuronidase and/or sulfatase, then analysed by HPLC and by liquid chromatography-MS. Several EC-related compounds were detected in plasma such as free EC, and glucuronide, sulfate, and glucuronide-sulfate conjugates of non-methylated or methylated EC. All EC metabolites showed a maximum concentration in plasma at 30-60 min post-administration. Glucuronide conjugates of both non-methylated and methylated EC were found in high concentration in plasma. Moreover, administration of cocoa powder significantly reduced the accumulation of lipid peroxides in plasma and significantly reduced the consumption of alpha-tocopherol in plasma oxidized by treatment with 2,2'-azobis-(2-amidinopropane) dihydrochloride (AAPH (25 mmol/l)) or CuSO(4) (100 micromol/l) compared with that in the case of plasma obtained before administration. The total EC concentration in plasma was negatively correlated with the level of accumulation of lipid peroxides in plasma oxidized by treatment with AAPH (25 mmol/l) and was positively correlated with the level of residual alpha-tocopherol in plasma oxidized by treatment with CuSO(4) (100 micromol/l). These results indicate that EC in cocoa powder was absorbed from the digestive tract, that various conjugated forms of EC were generated in the digestive tract and distributed to the plasma, and that these enhanced the antioxidative activity of plasma.
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Affiliation(s)
- S Baba
- Functional Foods R&D Laboratories, Meiji Seika Kaisha Ltd, 5-3-1, Chiyoda, Sakado-shi, Saitama 350-0289, Japan.
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Baba S, Osakabe N, Yasuda A, Natsume M, Takizawa T, Nakamura T, Terao J. Bioavailability of (-)-epicatechin upon intake of chocolate and cocoa in human volunteers. Free Radic Res 2000; 33:635-41. [PMID: 11200094 DOI: 10.1080/10715760000301151] [Citation(s) in RCA: 190] [Impact Index Per Article: 7.9] [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: 10/24/2022]
Abstract
We evaluated the levels of (-)-epicatechin (EC) and its metabolites in plasma and urine after intake of chocolate or cocoa by male volunteers. EC metabolites were analyzed by HPLC and LC/MS after glucuronidase and/or sulfatase treatment. The maximum levels of total EC metabolites in plasma were reached 2 hours after either chocolate or cocoa intake. Sulfate, glucuronide, and sulfoglucuronide (mixture of sulfate and glucuronide) conjugates of nonmethylated EC were the main metabolites present in plasma rather than methylated forms. Urinary excretion of total EC metabolites within 24 hours after chocolate or cocoa intake was 29.8+/-5.3%'; and 25.3+/-8.1% of total EC intake. EC in chocolate and cocoa was partly absorbed and was found to be present as a component of various conjugates in plasma, and these were rapidly excreted in urine.
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Affiliation(s)
- S Baba
- Funtional Foods R&D Labs, Meiji Seika Kaisha Ltd., Saitama, Japan.
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Moore KM, Davis JR, Sato T, Yasuda A. Reticuloendotheliosis virus (REV) long terminal repeats incorporated in the genomes of commercial fowl poxvirus vaccines and pigeon poxviruses without indication of the presence of infectious REV. Avian Dis 2000; 44:827-41. [PMID: 11195637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Because of reticuloendotheliosis virus (REV) contamination in commercial poultry vaccines, polymerase chain reaction (PCR) assays have been described to increase the sensitivity of biological assays used to detect REV in vaccines. The PCR assay designed to amplify the long terminal repeat (LTR) region of REV identified REV LTRs in many of the commercial fowl poxvirus (FPV) vaccines evaluated. These commercial vaccines were not thought to be contaminated with replicating REV because of the lack of REV outbreaks, the lack of in vitro amplification, and lack of a serologic response to REV. As previously described, the FPV S vaccine strain is known to carry infectious integrated proviral REV, whereas FPV M vaccine strain and its derivatives carry integrated LTRs or remnants of REV proviral DNA inserted into the FPV genome. Another PCR assay designed to amplify the envelope gene of REV was used to verify that the envelope proviral gene was not present in REV LTR PCR-positive samples. Southern blot analysis with REV LTR probes hybridized to the 9-kb EcoRI genomic fragment of all FPV and pigeon poxviruses evaluated, whereas the envelope probe did not hybridize to any poxvirus genome. Sequence analysis of the 9-kb EcoRI fragment indicated that an integrated REV LTR exists in the 9-kb EcoRI of some poxvirus genomes. A new PCR assay designed to amplify integrated REV LTRs in the 9-kb EcoRI fragment identified complete and incomplete integrated REV LTRs in all FPV and pigeon poxvirus genomes evaluated.
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Kuroda M, Mimaki Y, Sashida Y, Umegaki E, Yamazaki M, Chiba K, Mohri T, Kitahara M, Yasuda A, Naoi N, Xu ZW, Li MR. Flavonol glycosides from Epimedium sagittatum and their neurite outgrowth activity on PC12h cells. Planta Med 2000; 66:575-577. [PMID: 10985091 DOI: 10.1055/s-2000-8611] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The MeOH extract of Epimedium sagittatum was found to show neurite outgrowth activity on cultured PC12h cells. Bioassay-guided fractionation of the MeOH extract yielded six prenylated flavonol glycosides, ikarisoside A (1), icarisid II (2), epimedoside A (3), icariin (4), epimedin B (5), and epimedokoreanoside-I (6) as the active ingredients.
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Maruta K, Natume M, Hori K, Ishizuka D, Yasuda A, Taira S, Katakami T, Hidaka M, Nakata K, Kohata Y, Taguchi Y, Miyaoka M, Saito T. [A case of preoperatively diagnosed signet ring cell carcinoma of the appendix vermiformis]. Nihon Shokakibyo Gakkai Zasshi 2000; 97:580-4. [PMID: 10846413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- K Maruta
- 4Th Department of Internal Medicine, Tokyo Medical University
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Takahashi A, Takasaka T, Yasuda A, Amemiya Y, Sakai M, Kawauchi H. Identification of carp proopiomelanocortin-related peptides and their effects on phagocytes. Fish Shellfish Immunol 2000; 10:273-284. [PMID: 10938739 DOI: 10.1006/fsim.1999.0256] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report the immunomodulating effects of proopiomelanocortin (POMC)-related peptides on phagocytic cells in carp. The complete amino acid sequences of two carp POMCs (I and II) were deduced from the nucleotide sequences after cDNA cloning. Both POMCs consist of 194 amino acids (91% sequence identity) including identical alpha-melanotropin (MSH) and beta-endorphin (EP). All hormonal peptides derived from two POMCs were identified by mass spectrometry after separation by high-performance liquid chromatography of an acid-acetone extract from a single pituitary. These peptides were alpha-MSH, N-Des-Ac-alpha-MSH, di-Ac-alpha-MSH, beta-MSH I, beta-MSH-II, N-Ac-beta-EP(1-29), corticotropin-like intermediate lobe peptide I and II and N-terminal peptide of POMC I and II. The immunomodulating effects of synthetic MSHs and EPs on phagocytic cells from carp head kidney were examined. Di-Ac-alpha-MSH, beta-MSH I, N-Ac-beta-EP(1-29) and beta-EP(1-29) increased the production of superoxide anion at 0.1-100 ng ml-1 for these MSHs and 1-100 ng ml-1 for EPs in RPMI 1640 medium.
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Affiliation(s)
- A Takahashi
- Laboratory of Molecular Endocrinology, School of Fisheries Sciences, Kitasato University, Iwate, Japan.
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