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Kamagaya-shi, Japan

Hattori T.,Tokyo Medical and Dental University | Hattori T.,Juntendo University | Sato R.,Juntendo University | Sato R.,Tokyo Metroplitan University | And 3 more authors.
American Journal of Neuroradiology | Year: 2012

BACKGROUND AND PURPOSE: The fornix contains efferent fibers of the hippocampus and is in close contact with the corpus callosum. Part of the fornix is directly attached to the corpus callosum, and another part is suspended from the corpus callosum via the septum pellucidum. DTI can be used to evaluate the morphology and microstructural integrity of the fornix. We examined the pattern of fornix damage in patients with iNPH or AD. MATERIALS AND METHODS: We enrolled 22 patients with iNPH, 20 with AD, and 20 healthy controls. DTI data were obtained. The morphology (volume, length, and mean cross-sectional area) and FA values of the fornix were evaluated by using tract-specific analysis and compared among groups. RESULTS: The volume, cross-sectional area, and FA value of the fornix were significantly smaller in patients with iNPH than in controls, whereas the length was significantly greater. In patients with AD, the volume, mean cross-sectional area, and FA value of the fornix were significantly smaller than those in controls, whereas the length was not altered. The fornix was significantly longer in patients with iNPH than in patients with AD, whereas the volume and cross-sectional areas were significantly smaller. CONCLUSIONS: Our results suggest that the different pathogeneses of these diseases lead to fornix damage through different mechanisms: through mechanical stretching due to lateral ventricular enlargement and corpus callosum deformation in patients with iNPH, and through degeneration secondary to hippocampal atrophy in patients with AD. Source

Mochizuki T.,Kamagaya General Hospital | Momohara S.,Tokyo Womens Medical University | Yano K.,Tokyo Womens Medical University | Shirahata T.,Chibanishi General Hospital | Ikari K.,Tokyo Womens Medical University
Modern Rheumatology | Year: 2013

Objective: Tumor necrosis factor-α inhibitors have been available in recent years for treating early and established rheumatoid arthritis (RA). Twice-weekly administration of 25 mg etanercept (ETN) has demonstrated efficacy and safety. The objective of this study was to evaluate the efficacy of once-weekly administration of 50 mg ETN (ETN50), and to compare it with that of twice-weekly administration of 25 mg ETN (ETN25). Methods: The ETN50 group comprised 29 patients and the ETN25 group 26. The analysis compared changes from baseline in Disease Activity Score in 28 joints (DAS28)-C reactive protein (CRP) and DAS28-erythrocyte sedimentation rate (ESR) between the ETN50 and ETN25 groups. Results: Overall, 42.3 % of ETN50 patients achieved DAS28-ESR remission (<2.6), and 76.9 % experienced low disease activity at 24 weeks. Patients in the ETN50 group also experienced more significant improvement in DAS28-ESR at 4 weeks, higher DAS28-ESR remission rates, and lower disease activity rates than ETN25 group patients. No serious adverse events were experienced in the safety analysis set (ETN50 group). Conclusion: These results suggest that ETN50 can lead to earlier remission and higher remission rates compared with ETN25 in patients with RA. © 2012 Japan College of Rheumatology. Source

Nishiyama T.,Kamagaya General Hospital | Komatsu K.,University of Tokyo
Journal of Anesthesia | Year: 2010

Purpose: The aim of this study was to compare the cerebral state index (CSI) and bispectral index (BIS) during propofol-fentanyl-nitrous oxide anesthesia. Methods: Thirty patients scheduled for abdominal surgery, with a mean age of 30-70 years, were enrolled. Anesthesia was induced with propofol and fentanyl and was maintained with propofol, fentanyl, epidural mepivacaine, and nitrous oxide in oxygen. During surgery, the propofol infusion rate was adjusted to try to keep BIS at 40 ± 3 for 10 min and then decreased to keep the BIS at 60 ± 3 for 10 min. Results: The BIS had a larger value for the time between switching on the apparatus and starting to measure at a signal quality index >75%. The recovery time from disturbance by an electric cautery event was 41 ± 14 s for the BIS and 3 ± 1 s for the CSI (P < 0.05). The absolute values of the BIS and CSI were not significantly different and they showed a good correlation. The bias (mean of the differences, BIS - CSI) was negative at all measurement points, but the limits of agreement and percentage error were small. Conclusions: The absolute values of the BIS and CSI were not significantly different during propofol-fentanyl-nitrous oxide anesthesia. The start of the measurement was faster with the CSI than with the BIS after switch-on, and measurement was less disturbed by electric cautery with the CSI. © 2010 Japanese Society of Anesthesiologists. Source

Shirotani K.,Fukushima Medical University | Futakawa S.,Fukushima Medical University | Nara K.,Fukushima Medical University | Hoshi K.,Fukushima Medical University | And 9 more authors.
International Journal of Alzheimer's Disease | Year: 2011

We have established high-throughput lectin-antibody ELISAs to measure different glycans on transferrin (Tf) in cerebrospinal fluid (CSF) using lectins and an anti-transferrin antibody (TfAb). Lectin blot and precipitation analysis of CSF revealed that PVL (Psathyrella velutina lectin) bound an unique N-acetylglucosamine-terminated N-glycans on CSF-type Tf whereas SSA (Sambucus sieboldiana agglutinin) bound 2,6-N-acetylneuraminic acid-terminated N-glycans on serum-type Tf. PVL-TfAb ELISA of 0.5L CSF samples detected CSF-type Tf but not serum-type Tf whereas SSA-TfAb ELISA detected serum-type Tf but not CSF-type Tf, demonstrating the specificity of the lectin-TfAb ELISAs. In idiopathic normal pressure hydrocephalus (iNPH), a senile dementia associated with ventriculomegaly, amounts of the SSA-reactive Tf were significantly higher than in non-iNPH patients, indicating that Tf glycan analysis by the high-throughput lectin-TfAb ELISAs could become practical diagnostic tools for iNPH. The lectin-antibody ELISAs of CSF proteins might be useful for diagnosis of the other neurological diseases. © 2011 Keiro Shirotani et al. Source

Yoshida K.,Kamagaya General Hospital
Bio-medical materials and engineering | Year: 2013

A robust method for inducing bone-formation without an autograft has not been established. Currently, both platelet-rich plasma (PRP) and bone morphogenetic protein (BMP) have been widely investigated for their clinical use in such cases. However, their synergistic effect is still controversial and previously shown diversity of this effect depends on various factors such as the bone substitutes involved. In this study, we investigated the synergistic effect of PRP and BMP2 on an alloplastic substitute as potentiators to induce in vivo bone-formation. A 10 mm diameter bony defect in rabbit calvarium was reconstructed using biphasic calcium phosphate (BCP) ceramics with or without PRP, recombinant human (rh) BMP2, and their combination. At 6 and 12 weeks after implantation, rabbits were euthanized and the radiographic and histomorphometric features of bone reconstruction were analyzed. The results showed that defects filled by rhBMP2/BCP with or without PRP had high bone density at 6 and 12 weeks in radiological evaluation. However, in histomorphometric analysis, the defects filled by rhBMP2/BCP with PRP showed significant new bone formation compared with that by rhBMP2/BCP without PRP, especially at 6 weeks. We propose that the synergistic effect of PRP and rhBMP2 gives highly osteoinductive properties to alloplastic substitutes in vivo. Source

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