201
|
Kishi T, Kawashita T, Sasaki M, Hara Y, Fukunaga Y, Tominaga M, Ikushima H, Oita M. SU-E-T-484: Impact of Multileaf Collimator Leaf Positioning Accuracy on Intensity Modulated Radiation Therapy. Med Phys 2011. [DOI: 10.1118/1.3612437] [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: 11/07/2022] Open
|
202
|
Sasaki M, Fujiwara M, Ishizuka H, Klaus W, Wakui K, Takeoka M, Miki S, Yamashita T, Wang Z, Tanaka A, Yoshino K, Nambu Y, Takahashi S, Tajima A, Tomita A, Domeki T, Hasegawa T, Sakai Y, Kobayashi H, Asai T, Shimizu K, Tokura T, Tsurumaru T, Matsui M, Honjo T, Tamaki K, Takesue H, Tokura Y, Dynes JF, Dixon AR, Sharpe AW, Yuan ZL, Shields AJ, Uchikoga S, Legré M, Robyr S, Trinkler P, Monat L, Page JB, Ribordy G, Poppe A, Allacher A, Maurhart O, Länger T, Peev M, Zeilinger A. Field test of quantum key distribution in the Tokyo QKD Network. Opt Express 2011; 19:10387-10409. [PMID: 21643295 DOI: 10.1364/oe.19.010387] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A secure communication network with quantum key distribution in a metropolitan area is reported. Six different QKD systems are integrated into a mesh-type network. GHz-clocked QKD links enable us to demonstrate the world-first secure TV conferencing over a distance of 45km. The network includes a commercial QKD product for long-term stable operation, and application interface to secure mobile phones. Detection of an eavesdropper, rerouting into a secure path, and key relay via trusted nodes are demonstrated in this network.
Collapse
Affiliation(s)
- M Sasaki
- Quantum ICT Laboratory, National Institute of Information and Communication Technology, 4-2-1 Nukui-kitamachi, Koganei, Tokyo 184-8795, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
203
|
Cagide E, Louzao MC, Espiña B, Ares IR, Vieytes MR, Sasaki M, Fuwa H, Tsukano C, Konno Y, Yotsu-Yamashita M, Paquette LA, Yasumoto T, Botana LM. Comparative cytotoxicity of gambierol versus other marine neurotoxins. Chem Res Toxicol 2011; 24:835-42. [PMID: 21517028 DOI: 10.1021/tx200038j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Many microalgae produce compounds that exhibit potent biological activities. Ingestion of marine organisms contaminated with those toxins results in seafood poisonings. In many cases, the lack of toxic material turns out to be an obstacle to make the toxicological investigations needed. In this study, we evaluate the cytotoxicity of several marine toxins on neuroblastoma cells, focusing on gambierol and its effect on cytosolic calcium levels. In addition, we compared the effects of this toxin with ciguatoxin, brevetoxin, and gymnocin-A, with which gambierol shares a similar ladder-like backbone, as well as with polycavernoside A analogue 5, a glycosidic macrolide toxin. For this purpose, different fluorescent dyes were used: Fura-2 to monitor variations in cytosolic calcium levels, Alamar Blue to detect cytotoxicity, and Oregon Green 514 Phalloidin to quantify and visualize modifications in the actin cytoskeleton. Data showed that, while gambierol and ciguatoxin were successful in producing a calcium influx in neuroblastoma cells, gymnocin-A was unable to modify this parameter. Nevertheless, none of the toxins induced morphological changes or alterations in the actin assembly. Although polycavernoside A analogue 5 evoked a sharp reduction of the cellular metabolism of neuroblastoma cells, gambierol scarcely reduced it, and ciguatoxin, brevetoxin, and gymnocin-A failed to produce any signs of cytotoxicity. According to this, sharing a similar polycyclic ether backbone is not enough to produce the same effects on neuroblastoma cells; therefore, more studies should be carried out with these toxins, whose effects may be being underestimated.
Collapse
Affiliation(s)
- E Cagide
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Campus de Lugo, 27002 Lugo, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
204
|
Suzuki S, Kurata A, Yamada M, Iwamoto K, Nakahara K, Sato K, Niki J, Sasaki M, Kitahara T, Fujii K, Kan S. Outcomes analysis of ruptured distal anterior cerebral artery aneurysms treated by endosaccular embolization and surgical clipping. Interv Neuroradiol 2011; 17:49-57. [PMID: 21561558 DOI: 10.1177/159101991101700108] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 10/07/2010] [Indexed: 11/15/2022] Open
Abstract
Although endovascular surgery is now widely used to treat intracranial aneurysms, no comparative studies of clipping versus endovascular surgery to address distal ACA aneurysms at the same institution are available. We compared the results of these treatment modalities to address distal ACA aneurysms at our institution. We treated 68 patients with ruptured distal ACA aneurysms (endovascular surgery, n=13; clipping surgery, n=55). We performed a retrospective comparison of the treatment outcomes. To study the efficacy of endovascular surgery we classified all our cases into three types: type A were small-necked aneurysms, type B were wide-necked aneurysms on the parent artery, and type C were aneurysms in which the A3 portion of the ACA arose from the aneurysmal dome near the neck. Intraoperative hemorrhage occurred in 7.7% of aneurysms treated by endovascular surgery and in 34.5% treated by clipping surgery. In 7.7% of the endovascularly-treated aneurysms we noted coil migration during embolization surgery; venous infarction due to cortical vein injury occurred in 7.3% of clipped aneurysms. Of the endovascularly-treated aneurysms, 7.7% manifested post-embolization hemorrhage; 23.1% manifested coil compaction. In clipping surgery, postoperative rerupture occurred in 1.8% of the aneurysms; one patient presented with postoperative acute epidural hematoma. Clip dislocation was noted in 1.8% of aneurysms. Angiography was indicative of post-treatment vasospasm in 7.7% of aneurysms treated endovascularly and in 50.9% of the clipped aneurysms. The clinical outcome showed no significant difference between endovascular surgery and clipping surgery.
Collapse
Affiliation(s)
- S Suzuki
- Departments of Neurosurgery and 1Radiology, Kitasato University School of Medicine, Sagamihara, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
205
|
Kodera R, Shikata K, Kataoka HU, Takatsuka T, Miyamoto S, Sasaki M, Kajitani N, Nishishita S, Sarai K, Hirota D, Sato C, Ogawa D, Makino H. Glucagon-like peptide-1 receptor agonist ameliorates renal injury through its anti-inflammatory action without lowering blood glucose level in a rat model of type 1 diabetes. Diabetologia 2011; 54:965-78. [PMID: 21253697 DOI: 10.1007/s00125-010-2028-x] [Citation(s) in RCA: 285] [Impact Index Per Article: 21.9] [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] [Received: 06/04/2010] [Accepted: 11/30/2010] [Indexed: 12/11/2022]
Abstract
AIMS/HYPOTHESIS Glucagon-like peptide-1 (GLP-1) has various extra-pancreatic actions, in addition to its enhancement of insulin secretion from pancreatic beta cells. The GLP-1 receptor is produced in kidney tissue. However, the direct effect of GLP-1 on diabetic nephropathy remains unclear. Here we demonstrate that a GLP-1 receptor agonist, exendin-4, exerts renoprotective effects through its anti-inflammatory action via the GLP-1 receptor without lowering blood glucose. METHODS We administered exendin-4 at 10 μg/kg body weight daily for 8 weeks to a streptozotocin-induced rat model of type 1 diabetes and evaluated their urinary albumin excretion, metabolic data, histology and morphometry. We also examined the direct effects of exendin-4 on glomerular endothelial cells and macrophages in vitro. RESULTS Exendin-4 ameliorated albuminuria, glomerular hyperfiltration, glomerular hypertrophy and mesangial matrix expansion in the diabetic rats without changing blood pressure or body weight. Exendin-4 also prevented macrophage infiltration, and decreased protein levels of intercellular adhesion molecule-1 (ICAM-1) and type IV collagen, as well as decreasing oxidative stress and nuclear factor-κB activation in kidney tissue. In addition, we found that the GLP-1 receptor was produced on monocytes/macrophages and glomerular endothelial cells. We demonstrated that in vitro exendin-4 acted directly on the GLP-1 receptor, and attenuated release of pro-inflammatory cytokines from macrophages and ICAM-1 production on glomerular endothelial cells. CONCLUSIONS/INTERPRETATION These results indicate that GLP-1 receptor agonists may prevent disease progression in the early stage of diabetic nephropathy through direct effects on the GLP-1 receptor in kidney tissue.
Collapse
Affiliation(s)
- R Kodera
- Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8558, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
206
|
Sasaki M, Eida S, Sumi M, Nakamura T. Apparent diffusion coefficient mapping for sinonasal diseases: differentiation of benign and malignant lesions. AJNR Am J Neuroradiol 2011; 32:1100-6. [PMID: 21393402 DOI: 10.3174/ajnr.a2434] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE CT and MR imaging features of benign and malignant sinonasal lesions are often nonspecific. Therefore, we evaluated the ADC-based differentiation of these lesions. MATERIALS AND METHODS We retrospectively assessed ADCs of 61 patients with histologically proved sinonasal tumors and tumorlike lesions: 19 benign lesions, 28 malignant tumors, and 14 inflammatory lesions. Overall ADCs and percentages of total tumor area with extremely low, low, intermediate, or high ADCs (ADC mapping) were determined by using 2 b-values (500 and 1000 s/mm(2)). RESULTS ADCs of malignant tumors (0.87 ± 0.32 × 10(-3) mm(2)/s) were significantly lower than those of benign (1.35 ± 0.29 × 10(-3) mm(2)/s, P < .0001) and inflammatory (1.50 ± 0.50 × 10(-3) mm(2)/s, P = .0002) lesions. On ADC mapping, percentages of total tumor area within malignant tumors having extremely low or low ADCs were significantly (P < .0001) greater than those within benign and inflammatory lesions. Cutoff points for ADC mapping (≥78% of tumor areas having extremely low or low ADCs) effectively differentiated benign or inflammatory lesions and malignant tumors with 75% sensitivity, 94% specificity, 85% accuracy, and 91% positive and 82% negative predictive values, respectively. ADCs also effectively discriminated lymphomas and SCCs from other malignant tumors. CONCLUSIONS ADC mapping may be an effective MR imaging tool for the differentiation of benign/inflammatory lesions from malignant tumors in the sinonasal area.
Collapse
Affiliation(s)
- M Sasaki
- Department of Radiology and Cancer Biology, Nagasaki University School of Dentistry, Japan
| | | | | | | |
Collapse
|
207
|
Maeda T, Oyama JI, Sasaki M, Arima T, Makino N. The correlation between the clinical laboratory data and the telomere length in peripheral blood leukocytes of Japanese female patients with hypertension. J Nutr Health Aging 2011; 15:240-4. [PMID: 21369674 DOI: 10.1007/s12603-010-0137-3] [Citation(s) in RCA: 11] [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: 02/01/2023]
Abstract
OBJECTIVE This study investigated the correlation between the chronological age, telomere length in peripheral blood leukocytes and blood laboratory data of female patients with mild hypertension to identify laboratory data that reflect the biological aging of individuals. DESIGN Cross-sectional population-based study. SETTING Outpatient clinic of the Department of Cardiovascular, Respiratory, and Geriatric Medicine Kyushu University Hospital at Beppu in Japan. PARTICIPANTS Outpatients with mild hypertension treated with a low dose of amlodipine. MEASUREMENTS The laboratory data of female patients were collected and the telomere length parameters in their peripheral blood leukocytes were determined by Southern blotting. Any correlations between the laboratory data and the telomere length parameters were assessed. RESULTS The patients showed a positive correlation between the telomere length and the high density lipoprotein, albumin, creatinine, hemoglobin levels, red blood cell counts, and a negative correlation with the globulin level. The extent of subtelomeric methylation of long telomeres tended to correlate negatively with the telomeric attrition. Only the creatinine level correlated with subtelomeric methylation, but not with telomeric length. CONCLUSION HDL and the albumin/globulin ratio were potential indicators for individual somatic genomic aging. Creatinine may therefore be a useful indicator for a predisposition for telomeric attrition.
Collapse
Affiliation(s)
- T Maeda
- The Division of Molecular and Clinical Gerontology, Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Oita, 874-0838, Japan.
| | | | | | | | | |
Collapse
|
208
|
Ogawa K, Sasaki M, Ohnishi A, Kitaura M, Fujimoto H, Azuma J, Takahashi K, Kamada M. Valence electronic structure of β-FeSi2 single crystal investigated by photoelectron spectroscopy using synchrotron radiation. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.phpro.2011.01.033] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
209
|
Tohda H, Sasaki M, Tada A, Hara F, Idiris A, Kumagai H. Schizosaccharomyces pombe minimum genome factory. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.826] [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: 10/18/2022]
|
210
|
Gill MB, Frausto S, Ikoma M, Sasaki M, Oikawa M, Sakai R, Swanson GT. A series of structurally novel heterotricyclic alpha-amino-3-hydroxyl-5-methyl-4-isoxazole-propionate receptor-selective antagonists. Br J Pharmacol 2010; 160:1417-29. [PMID: 20590632 DOI: 10.1111/j.1476-5381.2010.00784.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE A new class of heterotricyclic glutamate analogues recently was generated by incorporating structural elements of two excitotoxic marine compounds, kainic acid and neodysiherbaine A. Rather than acting as convulsants, several of these 'IKM' compounds markedly depressed CNS activity in mice. Here, we characterize the pharmacological profile of the series with a focus on the most potent of these molecules, IKM-159. EXPERIMENTAL APPROACH The pharmacological activity and specificity of IKM compounds were characterized using whole-cell patch clamp recording from neurons and heterologous receptor expression systems, in combination with radioligand binding techniques. KEY RESULTS The majority of the IKM compounds tested reduced excitatory synaptic transmission in neuronal cultures, and IKM-159 inhibited synaptic currents from CA1 pyramidal neurons in hippocampal slices. IKM-159 inhibited glutamate-evoked whole-cell currents from recombinant GluA2- and GluA4-containing alpha-amino-3-hydroxyl-5-methyl-4-isoxazole-propionate (AMPA) receptors most potently, whereas kainate and NMDA receptor currents were not reduced by IKM-159. Antagonism of steady-state currents was agonist concentration dependent, suggesting that its mechanism of action was competitive, although it paradoxically did not displace [(3)H]-AMPA from receptor binding sites. IKM-159 reduced spontaneous action potential firing in both cultured hippocampal neurons in control conditions and during hyperactive states in an in vitro model of status epilepticus. CONCLUSIONS AND IMPLICATIONS IKM-159 is an AMPA receptor-selective antagonist. IKM-159 and related nitrogen heterocycles represent structurally novel AMPA receptor antagonists with accessible synthetic pathways and potentially unique pharmacology, which could be of use in exploring the role of specific populations of receptors in neurophysiological and neuropathological processes.
Collapse
Affiliation(s)
- M B Gill
- Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | | | | | | | | | | | | |
Collapse
|
211
|
Ikeda C, Honda R, Komaki H, Sasaki M, Munteanu I, Ramachandran N, Minassian B, Tsuburaya R, Hayashi Y, Nishino I. P2.23 Congenital form of X-linked myopathy with excessive autophagy associated with VMA21 mutation. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.095] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
212
|
Komaki H, Sakuma H, Saito Y, Nakagawa E, Sugai K, Sasaki M. P4.30 Muscle MRI of spinal muscular atrophy. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.226] [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]
|
213
|
Sakakibara T, Kaneko Y, Sugai K, Otsuki T, Kaido T, Takahashi A, Nakagawa E, Sasaki M. P25-23 Change of interhemispheric synchronized spike on magnetoencephalography before and after total callosotomy. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61045-0] [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]
|
214
|
Sasaki M, Yamazaki A, Haraguchi A, Tatsumi M, Ishida K, Ikadai H. Serological survey of Encephalitozoon cuniculi infection in Japanese dogs. J Parasitol 2010; 97:167-9. [PMID: 21348630 DOI: 10.1645/ge-2540.1] [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: 11/10/2022] Open
Abstract
Antibodies to Encephalitozoon cuniculi were examined by enzyme-linked immunosorbent assay using E. cuniculi PTP2 recombinant protein and by Western blot analysis on a total of 472 dog serum samples that had been collected in Japan. Of these samples, 21.8% (103/472) had antibodies against E. cuniculi. Each of 5 serum samples that showed high (>1.0) or low (<0.1) OD value was selected randomly and further examined by Western blot using E. cuniculi-native antigens. All samples with high OD values reacted with specific E. cuniculi proteins, including an antigen of approximately 35 kDa corresponding with PTP2; sera with low OD values did not recognize this E. cuniculi band. This study is the first to demonstrate the prevalence of E. cuniculi infection in dogs in Japan.
Collapse
Affiliation(s)
- M Sasaki
- Department of Veterinary Parasitology, School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
| | | | | | | | | | | |
Collapse
|
215
|
Sasaki M, Ogasawara N, Utsumi K, Kamiya T, Kataoka H, Tanida S, Mizoshita T, Shimura T, Hirata Y, Kasugai K, Joh T. The effectiveness of packed therapy with three drugs in Helicobacter pylori eradication in Japan. ACTA ACUST UNITED AC 2010; 32:243-6. [PMID: 20508872 DOI: 10.1358/mf.2010.32.4.1453631] [Citation(s) in RCA: 2] [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: 12/14/2022]
Abstract
Primary Helicobacter pylori eradication rate using triple therapy (a proton pump inhibitor [PPI] + amoxicillin [AMPC] + clarithromycin [CAM], over 7 days) is showing a declining trend. In this study we report recent eradication rates and have evaluated the usefulness of a pack preparation of three drugs. H. pylori eradication rate was 85.1% (57/67) in 2004 but then fell to 75.2% (79/105) in 2005, 70.1% (68/97) in 2006 and 69.9% (58/83) in 2007. With the introduction of packs (lansoprazole [LPZ] 60 mg, AMPC 1500 mg, CAM 400 mg) the eradication rate recovered to 78.0% (110/141) in 2008. A comparative study in 2008 delineated that the eradication rate in the pack group (88.4%, 38/43) was significantly higher than that of the conventional group (73.5%, 72/98). These results suggest that packs of eradication medicine are useful in increasing eradication success.
Collapse
Affiliation(s)
- M Sasaki
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
216
|
Awata S, Tanaka A, Nagayoshi M, Sasaki M, Tanaka I. PGD or natural conception? what is recommended for couples with recurrent miscarriages caused by translocation chromosomal aberrations? Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.494] [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: 10/19/2022]
|
217
|
Sasaki M, Tanaka A, Nagayoshi M, Awata S, Tanaka I. Risk level of intracytoplasmic spermatid injection for non-mosaic Klinefelter syndrome patients. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.212] [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: 10/19/2022]
|
218
|
Awata S, Tanaka A, Nagayoshi M, Sasaki M, Tanaka I. Selection of an optimal controlled ovarian hyperstimulation method in relation to the number of antral follicles in patients less than 40 years old. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.652] [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] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
219
|
Tanaka A, Nagayoshi M, Awata S, Sasaki M, Tanaka I, Kusunoki H. Direct visualization of metaphase-II chromosomes in human oocytes under an inverted microscope. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.977] [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]
|
220
|
Tanaka A, Nagayoshi M, Awata S, Sasaki M, Tanaka I. Retrospective health study on 278 babies conceived following cryopreserved spermatid injection into an electrically stimulated oocyte. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.963] [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: 11/15/2022]
|
221
|
Alonso E, Vale C, Sasaki M, Fuwa H, Konno Y, Perez S, Vieytes MR, Botana LM. Calcium oscillations induced by gambierol in cerebellar granule cells. J Cell Biochem 2010; 110:497-508. [PMID: 20336695 DOI: 10.1002/jcb.22566] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Gambierol is a marine polyether ladder toxin derived from the dinoflagellate Gambierdiscus toxicus. To date, gambierol has been reported to act either as a partial agonist or as an antagonist of sodium channels or as a blocker of voltage-dependent potassium channels. In this work, we examined the cellular effect of gambierol on cytosolic calcium concentration, membrane potential and sodium and potassium membrane currents in primary cultures of cerebellar granule cells. We found that at concentrations ranging from 0.1 to 30 microM, gambierol-evoked [Ca(2+)]c oscillations that were dependent on the presence of extracellular calcium, irreversible and highly synchronous. Gambierol-evoked [Ca(2+)]c oscillations were completely eliminated by the NMDA receptor antagonist APV and by riluzole and delayed by CNQX. In addition, the K(+) channel blocker 4-aminopyridine (4-AP)-evoked cytosolic calcium oscillations in this neuronal system that were blocked by APV and delayed in the presence of CNQX. Electrophysiological recordings indicated that gambierol caused membrane potential oscillations, decreased inward sodium current amplitude and decreased also outward IA and IK current amplitude. The results presented here point to a common mechanism of action for gambierol and 4-AP and indicate that gambierol-induced oscillations in cerebellar neurons are most likely secondary to a blocking action of the toxin on voltage-dependent potassium channels and hyperpolarization of sodium current activation.
Collapse
Affiliation(s)
- E Alonso
- Facultad de Veterinaria, Departamento de Farmacología, Universidad de Santiago de Compostela, Lugo, Spain
| | | | | | | | | | | | | | | |
Collapse
|
222
|
Yamada Y, Sugawara C, Satake Y, Yokoyama Y, Okada R, Nakayama T, Sasaki M, Kondo T, Oh J, Nakamura J, Hayes WW. He/Ar-atom scattering from molecular monolayers: C60/Pt(111) and graphene/Pt(111). J Phys Condens Matter 2010; 22:304010. [PMID: 21399342 DOI: 10.1088/0953-8984/22/30/304010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Supersonic He and Ar atomic beam scattering from C(60) and graphene monolayers adsorbed on a Pt(111) surface are demonstrated in order to obtain detailed insight into a gas-molecule collision that has not been studied in detail so far. The effective masses and phonon spectral densities of the monolayers seen by different projectiles are discussed based on classical models such as the hard cube model and the recently developed smooth surface model. Large effective masses are deduced for both the monolayers, suggesting collective effects of surface atoms in the single collision event. The effective Debye temperature of graphene was found to be similar to that reported in highly oriented pyrolytic graphite (HOPG), indicating that the graphene is decoupled well from the Pt substrate. A much smaller Debye-Waller factor was found for the C(60) layer, probably reflecting the strong C(60)-Pt(111) interaction.
Collapse
Affiliation(s)
- Y Yamada
- Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
223
|
Takagi Y, Kimura Y, Nakamura H, Sasaki M, Eguchi K, Nakamura T. Salivary gland ultrasonography: can it be an alternative to sialography as an imaging modality for Sjogren's syndrome? Ann Rheum Dis 2010; 69:1321-4. [DOI: 10.1136/ard.2009.123836] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
224
|
Chen V, Takhar M, Cohen-Freue G, Sasaki M, Ng R, Balshaw R, Keown PA, McManus B, McMaster R. EXPLORATORY AND INFERENTIAL STATISTICS FOR THE DISCOVERY OF PROTEOMIC BIOMARKERS OF ACUTE KIDNEY ALLOGRAFT REJECTION. Transplantation 2010. [DOI: 10.1097/00007890-201007272-00467] [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]
|
225
|
Naritomi H, Sasaki M, Kuribayashi Y, Sawada T, Kanashiro M. Validity of in vivo nuclear magnetic resonance methods in measurement of intracellular water and sodium. Biophys J 2010; 54:193. [PMID: 19431724 DOI: 10.1016/s0006-3495(88)82946-1] [Citation(s) in RCA: 4] [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: 11/18/2022] Open
|
226
|
Kato M, Chida K, Sato T, Kadowaki K, Tosa T, Oosaka H, Sasaki M, Sasaki F, Yoshida K. [Patient skin injury in cardiac intervention procedures]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2010; 66:688-9. [PMID: 20702988 DOI: 10.6009/jjrt.66.688] [Citation(s) in RCA: 2] [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: 11/11/2022]
Abstract
PURPOSE To discuss the circumstances of patient skin injury in cardiac interventional radiology (IVR). To demonstrate the importance of evaluating the patient radiation dose in IVR. To show the need for the appropriate patient follow-up after IVR to identify radiation effects. To highlight the incidence of skin injuries during IVRs. CONTENT ORGANIZATION Evaluation of 400 consecutive percutaneous coronary interventions (PCIs). The radiation dose, number of cine runs, and fluoroscopic time were recorded for all patients. The skin on the patients' backs was reviewed periodically after PCI to identify radiation injury. The relationships between patient skin effects and factors such as the radiation dose were investigated. Reviewing previous reports of patient radiation injury occurrence rate, fluoroscopic time, radiation dose (if available), etc. SUMMARY Although increasing numbers of case reports of patient radiation injury resulting from IVR are being published, these reports likely represent a small fraction of actual cases. Radiation skin injury in IVR is overlooked clinically in many patients. Patients who receive a high radiation dose while undergoing IVR should be followed to identify radiation skin effects, and physicians should seek to establish whether a patient has had previous IVR, together with the entrance site and radiation dose.
Collapse
|
227
|
Abstract
Encephalitic flaviviruses are important arthropod-borne pathogens of humans and other animals. In particular, the recent emergence of the West Nile virus (WNV) and Japanese encephalitis virus (JEV) in new geographic areas has caused a considerable public health alert and international concern. Among the experimental in vivo models of WNV and JEV infection, mice and other laboratory rodents are the most thoroughly studied and well-characterized systems, having provided data that are important for understanding the infectious process in humans. Macaca monkeys have also been used as a model for WNV and JEV infection, mainly for the evaluation of vaccine efficacy, although a limited number of published studies have addressed pathomorphology. These animal models demonstrate the development of encephalitis with many similarities to the human disease; however, the histological events that occur during infection, especially in peripheral tissues, have not been fully characterized.
Collapse
Affiliation(s)
- T Kimura
- Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, West 10 North 20, Kita-ku, Sapporo 001-0020 Japan.
| | | | | | | | | |
Collapse
|
228
|
Kawasaki Y, Harashima S, Sasaki M, Mukai E, Nakamura Y, Harada N, Toyoda K, Hamasaki A, Yamane S, Yamada C, Yamada Y, Seino Y, Inagaki N. Exendin-4 protects pancreatic beta cells from the cytotoxic effect of rapamycin by inhibiting JNK and p38 phosphorylation. Horm Metab Res 2010; 42:311-7. [PMID: 20213584 DOI: 10.1055/s-0030-1249035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [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: 10/19/2022]
Abstract
It has been reported that the immunosuppressant rapamycin decreases the viability of pancreatic beta cells. In contrast, exendin-4, an analogue of glucagon-like peptide-1, has been found to inhibit beta cell death and to increase beta cell mass. We investigated the effects of exendin-4 on the cytotoxic effect of rapamycin in beta cells. Incubation with 10 nM rapamycin induced cell death in 12 h in murine beta cell line MIN6 cells and Wistar rat islets, but not when coincubated with 10 nM exendin-4. Rapamycin was found to increase phosphorylation of c-Jun amino-terminal kinase (JNK) and p38 in 30 minutes in MIN6 cells and Wistar rat islets while exendin-4 decreased their phosphorylation. Akt and extracellular signal-regulated kinase (ERK) were not involved in the cytoprotective effect of exendin-4. These results indicate that exendin-4 may exert its protective effect against rapamycin-induced cell death in pancreatic beta cells by inhibiting JNK and p38 signaling.
Collapse
Affiliation(s)
- Y Kawasaki
- Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
229
|
Sasaki M, Ozawa Y, Kurihara T, Kubota S, Yuki K, Noda K, Kobayashi S, Ishida S, Tsubota K. Neurodegenerative influence of oxidative stress in the retina of a murine model of diabetes. Diabetologia 2010; 53:971-9. [PMID: 20162412 PMCID: PMC2850533 DOI: 10.1007/s00125-009-1655-6] [Citation(s) in RCA: 203] [Impact Index Per Article: 14.5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Accepted: 12/14/2009] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS Diabetic retinopathy is a progressive neurodegenerative disease, but the underlying mechanism is still obscure. Here, we focused on oxidative stress in the retina, and analysed its influence on retinal neurodegeneration, using an antioxidant, lutein. METHODS C57BL/6 mice with streptozotocin-induced diabetes were constantly fed either a lutein-supplemented diet or a control diet from the onset of diabetes, and their metabolic data were recorded. In 1-month-diabetic mice, reactive oxygen species (ROS) in the retina were measured using dihydroethidium and visual function was evaluated by electroretinograms. Levels of activated extracellular signal-regulated kinase (ERK), synaptophysin and brain-derived neurotrophic factor (BDNF) were also measured by immunoblotting in the retina of 1-month-diabetic mice. In the retinal sections of 4-month-diabetic mice, histological changes, cleaved caspase-3 and TUNEL staining were analysed. RESULTS Lutein did not affect the metabolic status of the diabetic mice, but it prevented ROS generation in the retina and the visual impairment induced by diabetes. ERK activation, the subsequent synaptophysin reduction, and the BDNF depletion in the diabetic retina were all prevented by lutein. Later, in 4-month-diabetic mice, a decrease in the thickness of the inner plexiform and nuclear layers, and ganglion cell number, together with increase in cleaved caspase-3- and TUNEL-positive cells, were avoided in the retina of lutein-fed mice. CONCLUSIONS/INTERPRETATION The results indicated that local oxidative stress that has a neurodegenerative influence in the diabetic retina is prevented by constant intake of a lutein-supplemented diet. The antioxidant, lutein may be a potential therapeutic approach to protect visual function in diabetes.
Collapse
Affiliation(s)
- M. Sasaki
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - Y. Ozawa
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - T. Kurihara
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - S. Kubota
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - K. Yuki
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - K. Noda
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | | | - S. Ishida
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K. Tsubota
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| |
Collapse
|
230
|
Sakuma H, Awaya Y, Shiomi M, Yamanouchi H, Takahashi Y, Saito Y, Sugai K, Sasaki M. Acute encephalitis with refractory, repetitive partial seizures (AERRPS): a peculiar form of childhood encephalitis. Acta Neurol Scand 2010; 121:251-6. [PMID: 20028339 DOI: 10.1111/j.1600-0404.2009.01198.x] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We conducted a nationwide multicenter study in Japan to elucidate the clinical and laboratory characteristics of acute encephalitis with refractory, repetitive partial seizures (AERRPS). MATERIALS AND METHODS Clinical and laboratory features, treatment, and outcome were assessed using a structured questionnaire. RESULTS Twenty-nine children were enrolled in the study. Refractory and repetitive partial seizures accompanied by fever were the cardinal clinical features. Partial seizures consisted principally of eye deviation or facial twitching, being periodically repeated during the acute phase. These seizures were refractory to conventional anticonvulsants and were only suppressed by high-dose intravenous barbiturate administration. Rhythmic activities on electroencephalography and non-specific cerebral atrophy on neuroimaging were common. Serum or cerebrospinal antibodies against GluRepsilon2 were positive in six patients. General prognosis was unfavorable due to intractable epilepsy and cognitive deficits. CONCLUSION Based on the peculiar and homogenous features, AERRPS can be regarded as a distinct clinical entity.
Collapse
|
231
|
Ward MB, Intallura PM, Natarajan CM, Hadfield RH, Atkinson P, Yuan ZL, Miki S, Fujiwara M, Sasaki M, Wang Z, Baek B, Nam SW, Ritchie DA, Shields AJ. Biexciton cascade in telecommunication wavelength quantum dots. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/210/1/012036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
232
|
Lin D, Cohen Freue G, Hollander Z, Sasaki M, Opushneva N, Imai C, Ignaszewski A, Mui A, Wilson-McManus J, Balshaw R. 149: Combinatorial Biomarkers of Cardiac Allograft Vasculopathy. J Heart Lung Transplant 2010. [DOI: 10.1016/j.healun.2009.11.158] [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] Open
|
233
|
|
234
|
Koyabu DB, Oshida T, Dang NX, Can DN, Kimura J, Sasaki M, Motokawa M, Son NT, Hayashida A, Shintaku Y, Endo H. Craniodental mechanics and the feeding ecology of two sympatric callosciurine squirrels in Vietnam. J Zool (1987) 2009. [DOI: 10.1111/j.1469-7998.2009.00629.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
235
|
Tsutsui M, Yasuda H, Suto H, Imai H, Isobe Y, Sasaki M, Kojima Y, Oshimi K, Sugimoto K. Frequent STAT3 activation is associated with Mcl-1 expression in nasal NK-cell lymphoma. Int J Lab Hematol 2009; 32:419-26. [PMID: 19968719 DOI: 10.1111/j.1751-553x.2009.01204.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Nasal natural killer (NK)-cell lymphoma was resistant to various antitumor agents. Although high expression of p-glycoprotein has been reported, other molecular mechanism of the chemo-resistance is largely unknown. Activation of STAT3 and expression of major apoptosis-related proteins Bcl-2, Bcl-x, and Mcl-1 were analyzed by immunohistochemistry. Effects of STAT3 inhibitor AG490 on NK-YS cell line were analyzed by Western blotting and flow cytometric apoptosis assay. STAT3 was activated in six of the nine nasal NK-cell lymphomas (67%). In contrast, STAT3 activation was detected in 35% of diffuse large B-cell lymphoma (DLBCL) and in 10% of follicular lymphoma (FL). Frequent activation of STAT3 was significantly correlated with Mcl-1 expression in nasal NK-cell lymphoma, i.e., Mcl-1 was positive in five of six STAT3-active cases and negative in all three STAT3-inactive ones. In DLBCL, not only six out of seven STAT3-active cases (86%) but also eight out of thirteen STAT3-inactive cases (62%) were positive for Mcl-1 expression. Latent membrane protein-1 was positive in four nasal NK-cell lymphomas, among which three cases showed intermediate STAT3 activation. Inhibition of STAT3 activation by JAK inhibitor AG490 decreased Mcl-1 expression and induced apoptosis in STAT3-active NK-YS cells. Serum starvation rather increased the Mcl-1 level in NK-YS cells, and this effect was also canceled by AG490. These results suggest that activation of STAT3-Mcl-1 axis may play a role in the chemotherapy resistance of nasal NK-cell lymphoma. The pathway may be one of the future therapeutic targets of this intractable disease.
Collapse
Affiliation(s)
- M Tsutsui
- Division of Hematology, Department of Internal Medicine, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
236
|
Abstract
Spontaneous tumour regression is extremely rare in aggressive lymphoma. A case of natural killer (NK) cell lymphoma with cutaneous manifestation showed an indolent clinical course, and the relapsed nodular lesion disappeared spontaneously without any treatment. Although only small number of T cells were present in the primary skin lesion, there was massive CD8-positive cytotoxic T cell infiltration in the relapsed lesion. This is believed to be the first report of an abscopal effect on NK cell lymphoma. Infiltration of cytotoxic T cells strongly suggests immunological attack against the lymphoma cells.
Collapse
Affiliation(s)
- Y Isobe
- Department of Hematology, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan
| | | | | | | | | |
Collapse
|
237
|
Akiba M, Tsujino K, Sato K, Sasaki M. Multipixel silicon avalanche photodiode with ultralow dark count rate at liquid nitrogen temperature. Opt Express 2009; 17:16885-16897. [PMID: 19770905 DOI: 10.1364/oe.17.016885] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multipixel silicon avalanche photodiodes (Si APDs) are novel photodetectors used as silicon photomultipliers (SiPMs), or multipixel photon counter (MPPC), because they have fast response, photon-number resolution, and a high count rate; one drawback, however, is the high dark count rate. We developed a system for cooling an MPPC to liquid nitrogen temperature and thus reduce the dark count rate. Our system achieved dark count rates of <0.2 cps. Here we present the afterpulse probability, counting capability, timing jitter, and photon-number resolution of our system at 78.5 K and 295 K.
Collapse
Affiliation(s)
- M Akiba
- National Institute of Information and Communications Technology, 4-2-1, Nukuikitamachi, Koganei-city, Tokyo 184-8795, Japan.
| | | | | | | |
Collapse
|
238
|
Arai A, Nonaka I, Saito Y, Komaki F, Sakuma H, Sugai K, Sasaki M, Robertson S, Nishimura G, Nishino I. G.P.12.09 Actin myopathy with myofibrillar dysgenesis and abnormal ossification. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.293] [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: 10/20/2022]
|
239
|
Nagoya S, Kaya M, Sasaki M, Tateda K, Kosukegawa I, Yamashita T. Cementless total hip replacement with subtrochanteric femoral shortening for severe developmental dysplasia of the hip. ACTA ACUST UNITED AC 2009; 91:1142-7. [PMID: 19721037 DOI: 10.1302/0301-620x.91b9.21736] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Total hip replacement for high dislocation of the hip joint remains technically difficult in terms of preparation of the true acetabulum and restoration of leg length. We describe our experience of cementless total hip replacement combined with a subtrochanteric femoral shortening osteotomy in 20 hips with Crowe grade IV dislocation with a mean follow-up of 8.1 years (4 to 11.5). There was one man and 17 women with a mean age of 55 years (44 to 69) at the time of the operation. After placment of the acetabular component at the site of the natural acetabulum, a cementless porous-coated cylindrical femoral component was implanted following a subtrochanteric femoral shortening osteotomy. The mean Japanese Orthopedic Association hip score improved from a mean of 38 (22 to 62) to a mean of 83 points (55 to 98) at the final follow-up. The mean lengthening of the leg was 14.8 mm (−9 to 34) in patients with iliofemoral osteoarthritis and 35.3 mm (15 to 51) in patients with no arthritic changes. No nerve palsy was observed. Total hip replacement combined with subtrochanteric shortening femoral osteotomy in this situation is beneficial in avoiding nerve injury and still permits valuable improvement in inequality of leg length.
Collapse
Affiliation(s)
- S. Nagoya
- Department of Orthopaedic Surgery Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, Japan
| | - M. Kaya
- Department of Orthopaedic Surgery Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, Japan
| | - M. Sasaki
- Department of Orthopaedic Surgery Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, Japan
| | - K. Tateda
- Department of Orthopaedic Surgery Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, Japan
| | - I. Kosukegawa
- Department of Orthopaedic Surgery Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, Japan
| | - T. Yamashita
- Department of Orthopaedic Surgery Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, Japan
| |
Collapse
|
240
|
Shimbo M, Tomioka S, Sasaki M, Shima T, Suzuki N, Murakami S, Nakatsu H, Shimazaki J. PSA Doubling Time as a Predictive Factor on Repeat Biopsy for Detection of Prostate Cancer. Jpn J Clin Oncol 2009; 39:727-31. [DOI: 10.1093/jjco/hyp091] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
241
|
Minagar A, Long A, Ma T, Jackson TH, Kelley RE, Ostanin DV, Sasaki M, Warren AC, Jawahar A, Cappell B, Alexander JS. Interferon (IFN)-ß1a and IFN-ß1b Block IFN-?-Induced Disintegration of Endothelial Junction Integrity and Barrier. ACTA ACUST UNITED AC 2009; 10:299-307. [PMID: 14741845 DOI: 10.1080/10623320390272299] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Recent clinical trials indicate the efficacy of interferon (IFN)-beta 1b in reducing relapse rate in relapsing-remitting multiple sclerosis (MS), whereas a surge of IFN-gamma precedes and provokes acute relapses. Disruption of the cerebral endothelial barrier and transendothelial migration of inflammatory cell migration into the brain play a significant role in pathogenesis of MS and may be driven by this surge in IFN-gamma. However, the molecular mechanisms underlying the beneficial effects of IFN-beta 1b against the deleterious effects of IFN-gamma on the barrier formed by the junctional proteins remain to be characterized. The authors investigated the effects of IFN-beta 1b, IFN-beta 1a, and IFN-gamma on the integrity of two endothelial junctional proteins, occludin and vascular endothelial-cadherin (VE-cadherin). Human umbilical vein endothelial cell (HUVEC) layers were treated with IFN-beta 1b, IFN-beta 1a, IFN-gamma, IFN-beta 1b plus IFN-gamma, or IFN-beta 1a plus IFN-gamma. IFN-beta 1b, IFN-beta 1a, and IFN-gamma effects on occludin and VE-cadherin integrity and electrical resistance were assessed by Western blotting and immunofluorescence. IFN-gamma significantly reduced occludin expression and produced gaps in endothelial monolayers. VE-cadherin expression was decreased to a lesser extent in endothelial cells exposed to IFN-gamma. IFN-beta 1b significantly attenuated the IFN-gamma-induced decrease in occludin and VE-cadherin expression. The protective effects of IFN-beta 1a on IFN-gamma-treated endothelial cells were similar to those of IFN-beta 1b. IFN-gamma also significantly reduced endothelial monolayer electrical resistance; this effect was blocked by either IFN-beta 1a or IFN-beta 1b. IFN-beta 1a and IFN-beta 1b effectively prevent the IFN-gamma-induced disintegration of the endothelial tight junctions and sustain barrier against the effects of IFN-gamma. The protective effects of IFN-beta on occludin and VE-cadherin stability appear to represent molecular mechanisms for the therapeutic effects of the IFN-beta on blood brain barrier in MS.
Collapse
Affiliation(s)
- A Minagar
- Department of Neurology, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
242
|
Kanehira E, Omura K, Kinoshita T, Sasaki M, Watanabe T, Kawakami K, Watanabe Y. Development of a 23.5 kHz ultrasonically activated device for laparoscopic surgery. MINIM INVASIV THER 2009. [DOI: 10.3109/13645709809152874] [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: 11/13/2022]
|
243
|
Kaya M, Wada T, Nagoya S, Sasaki M, Matsumura T, Yamashita T. The level of vascular endothelial growth factor as a predictor of a poor prognosis in osteosarcoma. ACTA ACUST UNITED AC 2009; 91:784-8. [PMID: 19483233 DOI: 10.1302/0301-620x.91b6.21853] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We undertook a prospective study to evaluate the prognostic significance of the serum levels of vascular endothelial growth factor (VEGF) in predicting the survival of patients with osteosarcoma. The levels were measured by an enzyme-linked immunosorbent assay in 15 patients with osteosarcoma before commencing treatment. The patients were divided into two groups, with a high or a low serum VEGF level, and the incidence of metastases and overall survival rate were compared. No significant relationship was observed between the serum VEGF levels and gender, age, the size of the tumour or the response to pre-operative chemotherapy. Patients with a serum VEGF > 1000 pg/ml had significantly worse survival than those with a level < 1000 pg/ml (p = 0.002). The serum VEGF level may be useful in predicting the prognosis for survival in patients with osteosarcoma.
Collapse
Affiliation(s)
- M Kaya
- Department of Orthopaedic Surgery, Sapporo Medical University, School of Medicine, Chuo-ku, Sapporo, Japan.
| | | | | | | | | | | |
Collapse
|
244
|
Shinkuma S, Kodama K, Yaosaka M, Tomita Y, Sasaki M, Somekawa Y. Mucoepidermoid carcinoma with cutaneous infiltration similar to a subcutaneous cystic tumour. Clin Exp Dermatol 2009; 34:e354-5. [PMID: 19486053 DOI: 10.1111/j.1365-2230.2009.03305.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
245
|
Ninomiya T, Kubota Y, Sasaki M, Ikari T, Sugi T, Tsuneyoshi T, Takenoshita Y. Effects of palatal lift prosthesis and repushback surgery on velopharyngeal incompetence in cleft palate patients. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.528] [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: 10/20/2022]
|
246
|
Ikari T, Sasaki M, Tohdoh M, Tsuneyoshi T, Sugi T, Kumamaru W, Ninomiya T, Kanamoto M, Kubota Y, Takenoshita Y. Study on surgical cases of fracture of the mandible, and breakage of an absorptive screw in our hospital. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.552] [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]
|
247
|
Abstract
We report the search for a nonstandard force by measuring the Casimir forces in the 0.48-6.5 microm range. By comparing the data and the theory of the Casimir force, we have obtained constraints for the parameter alpha of the Yukawa-type deviations from Newtonian gravity. The obtained limits are more stringent than previous limits in the 1.0-2.9 microm range. Furthermore, we have obtained lower limits for the fundamental scale M* for gauged baryon number in the bulk. In particular, for six extra dimensions, the limits on M* are stringent in the range 6.5x10(-6)<rho<2.5x10(-4).
Collapse
Affiliation(s)
- M Masuda
- Institute for Cosmic Ray Research, University of Tokyo, Chiba 277-8582, Japan.
| | | |
Collapse
|
248
|
Saito T, Sasaki M, Kawanabe H, Yoshino Y, Goto M. Subcritical Water Reaction Behavior of D-Glucose as a Model Compound for Biomass Using Two Different Continuous-Flow Reactor Configurations. Chem Eng Technol 2009. [DOI: 10.1002/ceat.200800537] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
249
|
Agungpriyono S, Kurohmaru M, Kimura J, Wahid AH, Sasaki M, Kitamura N, Yamada J, Fukuta K, Zuki AB. Distribution of lectin-bindings in the testis of the lesser mouse deer, Tragulus javanicus. Anat Histol Embryol 2009; 38:208-13. [PMID: 19245668 DOI: 10.1111/j.1439-0264.2008.00923.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The distribution of lectin bindings in the testis of the smallest ruminant, lesser mouse deer (Tragulus javanicus), was studied using 12 biotinylated lectins specific for d-galactose (peanut agglutinin PNA, Ricinus communis agglutinin RCA I), N-acetyl-d-galactosamine (Dolichos biflorus agglutinin DBA, Vicia villosa agglutinin VVA, Soybean agglutinin SBA), N-acetyl-D-glucosamine and sialic acid (wheat germ agglutinin WGA, s-WGA), D-mannose and d-glucose (Lens culinaris agglutinin LCA, Pisum sativum agglutinin PSA, Concanavalin A Con A), L-fucose (Ulex europaeus agglutinin UEA I), and oligosaccharide (Phaseolus vulgaris agglutinin PHA-E) sugar residues. In Golgi-, cap-, and acrosome-phase spermatids, lectin-bindings were found in the acrosome (PNA, RCA I, VVA, SBA, WGA and s-WGA), and in the cytoplasm (PNA, RCA I, VVA, SBA, WGA, LCA, PSA, Con A and PHA-E). s-WGA binding was confined to the spermatid acrosome, but other lectins were also observed in spermatocytes. In spermatogonia, VVA, WGA, Con A, and PHA-E bindings were observed. Sertoli cells were intensely stained with DBA and Con A, and weakly with PHA-E. In interstitial Leydig cells, RCA I, DBA, VVA, Con A, PSA, LCA, WGA and PHA-E were positive. UEA I was negative in all cell types including spermatogenic cells. Unusual distribution of lectin-bindings noted in the testis of lesser mouse deer included the limited distribution of s-WGA only in the spermatid acrosome, the distribution of DBA in Sertoli cells, Leydig cells and lamina propria, and the absence of UEA I in all type cells. The present results were discussed in comparison with those of other animals and their possible functional implications.
Collapse
Affiliation(s)
- S Agungpriyono
- Department of Anatomy, Physiology and Pharmacology, Bogor Agricultural University, Bogor 16680, Indonesia.
| | | | | | | | | | | | | | | | | |
Collapse
|
250
|
Cohen Freue G, Lin D, Imai C, Ignaszewski A, Mancini J, Hollander Z, Bergman A, Sasaki M, Wilson-McManus J, Balshaw R, Ng R, Borchers C, Keown P, McManus B, McMaster R. 341: Proteomic Biomarkers of Chronic Heart Allograft Rejection. J Heart Lung Transplant 2009. [DOI: 10.1016/j.healun.2008.11.348] [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] Open
|