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Hattori H. Epidural angiolipoma is histologically distinct from its cutaneous counterpart in the calibre and density of its vascular component; a case report with review of the literature. J Clin Pathol 2005; 58:882-3. [PMID: 16049295 PMCID: PMC1770889 DOI: 10.1136/jcp.2004.023895] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Angiolipoma of the spine is a rare tumour and no studies have investigated a sufficient number of cases to reach general conclusions. Therefore, as yet, the pathological definition of this entity is not well established. The case of epidural angiolipoma reported here and a review of the literature revealed that this entity is distinct from cutaneous angiolipoma in that the calibre of its predominant vascular component is far greater than that of the fat cells. Therefore, epidural angiolipoma can be regarded as not only topographically, but also histologically, distinct from its subcutaneous counterpart.
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Sumi Y, Hayashi Y, Hattori H, Ueda M. Dialysis-related amyloidosis of the temporomandibular joint. Int J Oral Maxillofac Surg 2005; 34:696-8. [PMID: 16053899 DOI: 10.1016/j.ijom.2004.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2003] [Revised: 06/08/2004] [Accepted: 10/22/2004] [Indexed: 11/16/2022]
Abstract
Dialysis-related amyloidosis (DRA) is a serious complication occurring most commonly in patients undergoing long-term hemodialysis. We describe a case of amyloidosis of the bilateral temporomandibular joint (TMJ) that developed after long-term hemodialysis therapy.
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Oomen PHN, van Tol A, Hattori H, Smit AJ, Scheek LM, Dullaart RPF. Human plasma phospholipid transfer protein activity is decreased by acute hyperglycaemia: studies without and with hyperinsulinaemia in Type 1 diabetes mellitus. Diabet Med 2005; 22:768-74. [PMID: 15910630 DOI: 10.1111/j.1464-5491.2005.01521.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS Little is known about the regulation of phospholipid transfer protein (PLTP), that plays a key role in lipoprotein metabolism. PLTP secretion may be up-regulated by glucose in vitro, whereas plasma PLTP activity is decreased by exogenous hyperinsulinaemia and glucose-induced hyperinsulinaemia in vivo. In the present study, we evaluated the separate effects of hyperglycaemia and hyperinsulinaemia in C-peptide-negative Type 1 diabetic patients. METHODS The protocol was carried out in 16 patients (eight females). In each individual, plasma PLTP mass and activity (measured by enzyme-linked immuno-sorbent assay and liposome-high density lipoprotein system, respectively) as well as plasma cholesteryl ester transfer protein (CETP) activity, lipids and apolipoprotein levels were determined at the end of four different glucose clamps, each lasting 210 min: standard insulin (30 mU/kg/h) and standard glucose (glucose 5.0 mmol/l) (SI-SG), standard insulin and high glucose (glucose 12 mmol/l) (SI-HG), high insulin (150 mU/kg/h) and standard glucose (HI-SG), and high insulin and high glucose (HI-HG). RESULTS Plasma lipids and (apo)lipoproteins, measured at the end of the SI-HG, HI-SG and HI-HG clamps, were not significantly different compared with the levels obtained at the end of the SI-SG clamp. Median plasma PLTP mass and activity at the end of the SI-SG clamp were 12.8 mg/l and 13.2 micromol/ml/h, respectively. Median plasma PLTP mass decreased by 9.1% at the end of the HI-HG clamp (P < 0.01), whereas the changes at the end of the SI-HG and HI-SG clamps were not significant. Median plasma PLTP activity decreased by 5.7, 4.6 and 8.6% at the end of the SI-HG, HI-SG and HI-HG clamps, respectively (all P < 0.05). Median plasma CETP activity was 177 nmol/ml/h at the end of the SI-SG clamp, and decreased by 4.9% (P < 0.05) and by 8.3% (P < 0.05) at the end of the HI-SG and the HI-HG clamps, respectively. Plasma CETP activity did not change significantly at the end of the SI-HG clamp. CONCLUSIONS The present study demonstrates that plasma PLTP activity is independently decreased by acute hyperglycaemia and hyperinsulinaemia in humans in vivo. These data do not support a direct role of short-term hyperglycaemia in up-regulating plasma PLTP levels.
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Palmen J, Colhoun HM, Van Tol A, Hattori H, Humphries SE. A novel common variant −181 G insertion in the promoter of the gene for phospholipid transfer protein. Atherosclerosis 2005; 180:211-3. [PMID: 15823296 DOI: 10.1016/j.atherosclerosis.2004.12.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Revised: 11/29/2004] [Accepted: 12/03/2004] [Indexed: 11/25/2022]
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Hattori H, Saitoh Y, Nakajima H, Sanbe N, Akatu M, Murakawa M. Gabexate mesilate hastens recovery from vecuronium-induced neuromuscular blockade. Eur J Anaesthesiol 2005; 22:20-4. [PMID: 15816568 DOI: 10.1017/s0265021505000050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND OBJECTIVE To test the hypothesis that gabexate mesilate, a protease inihibitor, hastens recovery from neuromuscular blockade, we examined the effect of gabexate mesilate on the recovery of vecuronium-induced neuromuscular blockade in anaesthetized patients in a double-blind, randomized fashion. METHODS Thirty adult patients were divided into two groups of 15. In the gabexate mesilate group, immediately after administration of vecuronium 0.1 mg kg(-1), a continuous infusion of gabexate mesilate was started at a speed of 1.5 mg kg(-1) h(-1). In the control group, normal saline was administered instead of gabexate mesilate. Times to the return of T1, T2, T3 or T4 (first, second, third and fourth response of train-of-four (TOF)), times to the recovery of T1/control to 0.25 (T25) or 0.5 (T50), recovery of T1/control or TOF ratio (T4/T1) were compared between the two groups. RESULTS Times to the returns of T1, T2, T3 and T4 in the gabexate mesilate group were significantly shorter than in the control group (19.4 +/- 6.8 vs. 25.7 +/- 7.2 min for T1; mean +/- SD, P = 0.020). Times to T25 and T50 were significantly shorter in the gabexate mesilate group than in the control group (34.0 +/- 9.9 vs. 51.3 +/- 10.2 min for T25, P < 0.001). T1/control and TOF ratio in the gabexate mesilate group were significantly higher than in the control group 40-80 min and 40-120 min after administration of vecuronium, respectively (P < 0.05). CONCLUSION Gabexate mesilate hastens recovery from neuromuscular block in anaesthetized patients receiving vecuronium.
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Okano M, Hattori H, Yoshino T, Sugata Y, Yamamoto M, Fujiwara T, Satoskar AA, Satoskar AR, Nishizaki K. Nasal exposure to Staphylococcal enterotoxin enhances the development of allergic rhinitis in mice. Clin Exp Allergy 2005; 35:506-14. [PMID: 15836761 DOI: 10.1111/j.1365-2222.2005.02195.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Staphylococcal enterotoxins (SEs) appear to play a role in the pathogenesis of allergic disease. However, little is known whether the nasal exposure to SE affects the development of allergic rhinitis (AR). OBJECTIVE We sought to determine the in vivo effect of nasal exposure to SE on the development of AR using mouse model. METHODS BALB/c mice were intranasally sensitized with Schistosoma mansoni egg antigen (SmEA) in the presence or absence of staphylococcal enterotoxin B (SEB). Control mice were intranasally sensitized with either SEB or SmEA alone. The production of antigen-specific antibodies including IgE, nasal eosinoplilia and cytokines by nasal mononuclear cells was compared among mice that had or had not received SEB treatment. RESULTS Nasal exposure to SEB enhanced the development of AR in SmEA-sensitized mice, as manifested by SmEA-specific IgE production, nasal eosinophilia, and IL-4 and IL-5 production by nasal mononuclear cells after Ag challenge. This treatment also elicited IFN-gamma production by SmEA-primed cells. In addition, these mice produced SEB-specific IgE whereas mice treated with SEB without SmEA sensitization did not produce SEB-specific IgE or demonstrate nasal eosinophilia. CONCLUSION These results suggest that the nasal exposure to SEB enhances susceptibility to AR although the exposure to SE solely does not induce AR.
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Dullaart RPF, De Vries R, Scheek L, Borggreve SE, Van Gent T, Dallinga-Thie GM, Ito M, Nagano M, Sluiter WJ, Hattori H, Van Tol A. Type 2 diabetes mellitus is associated with differential effects on plasma cholesteryl ester transfer protein and phospholipid transfer protein activities and concentrations. Scandinavian Journal of Clinical and Laboratory Investigation 2005; 64:205-15. [PMID: 15222630 DOI: 10.1080/00365510410005721] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Human plasma contains two lipid transfer proteins, cholesteryl ester transfer protein (CETP) and phospholipid transfer protein (PLTP), which are crucial in reverse cholesterol transport. METHODS Plasma CETP and PLTP activity levels and concentrations in 16 type 2 diabetic patients and 16 matched healthy subjects were determined, and these data were correlated to clinical variables, including insulin sensitivity and lipid levels. RESULTS Plasma triglycerides were higher (p<0.02) and high-density lipoprotein (HDL) cholesterol (p<0.02) was lower in diabetic patients. Plasma CETP activity and concentrations were not significantly different between diabetic and healthy subjects, but CETP specific activity was lower in diabetic patients (p<0.001). Multiple regression analysis showed that plasma CETP activity was positively related to CETP concentration (p=0.0001) and negatively to the diabetic state (p<0.002) or to HbA1c (p<0.02). PLTP activity (p<0.05) and specific activity were higher (p<0.05), whereas there was no difference in PLTP concentration between the two groups. There was no significant bivariate correlation between PLTP concentration and activity, in either healthy or diabetic subjects. Multiple regression analysis did disclose positive relationships of PLTP activity with PLTP concentration (p=0.0001), plasma triglycerides (p=0.0001) and waist/hip ratio (p=0.0001), but not with the diabetic state or HbA1c. CONCLUSIONS Neither CETP nor PLTP activity was independently associated with insulin sensitivity. Specific CETP activity is decreased in type 2 diabetes mellitus. In contrast, specific PLTP activity is higher in diabetes, as a result of the association of plasma PLTP activity with plasma triglycerides and obesity. Measurement of both plasma lipid transfer protein activity and mass levels may thus provide extra information in diabetes mellitus.
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Takishita T, Okano M, Takahashi K, Yoshino T, Sugata Y, Hattori H, Ohuchi S, Ogawa T, Nishizaki K. Characterization of allergen-specific monocyte-derived dendritic cells generated from monocytes by a single-step procedure: effect on naïve and memory T cells. Allergy 2005; 60:211-7. [PMID: 15647043 DOI: 10.1111/j.1398-9995.2005.00660.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Dendritic cells are one of the most potent antigen-presenting cells and when pulsed with allergen can modulate allergen-specific T-cell responses. We sought to establish a single-step method by which to generate allergen-specific monocyte-derived dendritic cells (MoDCs). METHODS Dermatophagoides farinae (Df)-prepulsed MoDCs were generated from monocytes by culturing with Df in the presence interleukin (IL)-4, granulocyte-macrophage colony-stimulating factor (GM-CSF) and tumour necrosis factor (TNF)-alpha simultaneously. Df-prepulsed MoDC were incubated with autologous naive and memory T cells in the absence of recall antigen, then proliferation and cytokine production by T cells was determined. RESULTS Generation of allergen-prepulsed MoDCs was confirmed by examining expression of surface molecules. Df-prepulsed MoDC selectively induced proliferation of Df-specific T cells in the absence of recall antigen. Under these conditions, Df-prepulsed MoDCs augmented but did not alter the cytokine production profile. In addition, Df-prepulsed MoDCs activated naive T cells leading to proliferation and selective production of IFN-gamma in allergic patients but not in healthy subjects. CONCLUSIONS These results suggest that Df-prepulsed MoDC generated from monocytes by a simple single-step manipulation can induce Df-specific cellular responses from both naive and memory T cells in the absence of recall antigen, and these cells potentially can be utilized as immune adjuvants in allergen-specific immunotherapy.
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Saitoh Y, Hattori H, Sanbe N, Nakajima H, Akatu M, Murakawa M. Retracted
: Reversal of vecuronium with neostigmine in patients with diabetes mellitus. Anaesthesia 2004; 59:750-4. [PMID: 15270964 DOI: 10.1111/j.1365-2044.2004.03833.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reversal of vecuronium-induced neuromuscular blockade with neostigmine was compared in two groups of 16 subjects: patients with Type 2 diabetes mellitus and normal controls. When the first twitch of the train-of-four had returned to 25% of the control value, neostigmine 40 microg x kg(-1) and atropine 20 microg x kg(-1) were given to reverse the neuromuscular blockade. The train-of-four ratio was lower at 3 min, 6 min, 9 min, 12 min and 15 min after reversal in the diabetic group than in the control group but the differences did not reach statistical significance. Fifteen minutes after reversal, the number of patients in whom recovery from neuromuscular blockade was judged insufficient to guarantee good respiratory function (train-of-four ratio < 0.74) did not differ between the groups. However, 15 min after reversal, the number of patients with a train-of-four ratio < 0.9 was significantly higher in the Diabetic Group than in the Control Group (15 vs. 10, p = 0.033).
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Hattori H. High prevalence of haemosiderin accumulation in the cytoplasm of gastric glands in patients with liver cirrhosis. J Clin Pathol 2004; 57:621-4. [PMID: 15166268 PMCID: PMC1770335 DOI: 10.1136/jcp.2003.010405] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIMS To investigate the presence of iron in biopsy and resection specimens from the stomach of patients with hepatic cirrhosis of various aetiologies. METHODS Among 753 patients who had been admitted to the hospital with liver cirrhosis from 1984 to 2002, and 723 patients who underwent liver biopsy or liver resection from 1990 to 2003, 426 patients with concomitant gastric biopsy or gastrectomy were selected for study. Formalin fixed, paraffin wax embedded tissues of the stomach and the liver (when available) were retrieved from the pathology files of Kariya General Hospital, Japan. Haematoxylin and eosin staining and Perls' stain were performed for all the available tissues and haemosiderin and its localisation were examined. RESULTS In total, 78 patients-72 of those with cirrhosis (26%) and six without cirrhosis (4%)-showed accumulation of haemosiderin. Regardless of aetiology, patients with clinical varices showed more frequent haemosiderin accumulation (40%) than patients without varices (19%). For patients with cirrhosis, there were no significant differences in the positive rate between those with (28%) or without (23%) hepatocellular carcinoma. CONCLUSION The significant increase in haemosiderin deposition in the gastric glands of patients with cirrhosis suggests that the assessment of iron deposition in gastric biopsy specimens may have predictive value in controlling patients with cirrhosis.
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Voorbij H, van Himbergen T, de Graaf J, Hattori H, Kastelein J, van Tits L, Stalenhoef A, Roest M. W14.396 The effects of paraoxonase on cholesterol lowering by simvastatin and atorvastatin. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90395-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dallinga-Thie G, Hattori H, van Tol A. W11.278 Atorvastatin treatment in type 2 diabetes mellitus decreases PLTP activity. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90277-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hattori H. False glomerulus in renal biopsy specimen: a possible pitfall under the dissecting microscope. J Clin Pathol 2004; 57:336. [PMID: 14990617 PMCID: PMC1770230 DOI: 10.1136/jcp.2003.014332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Suminoe A, Matsuzaki A, Hattori H, Koga Y, Kinukawa N, Ishii E, Hara T. mRNA expression of apoptosis-associated genes in infant acute lymphoblastic leukemia: low Fas expression is an independent predictor for poor prognosis. Leukemia 2004; 18:365-8. [PMID: 14647399 DOI: 10.1038/sj.leu.2403228] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hattori H. High-grade thymic carcinoma other than basaloid or mucoepidermoid type could be associated with multilocular thymic cyst: report of two cases. Histopathology 2003; 43:501-2. [PMID: 14636280 DOI: 10.1046/j.1365-2559.2003.01697.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Hattori H. Caution should be taken in using CD31 for distinguishing the vasculature of lymph nodes. J Clin Pathol 2003. [DOI: 10.1136/jcp.56.8.638-a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hattori H. Caution should be taken in using CD31 for distinguishing the vasculature of lymph nodes. J Clin Pathol 2003; 56:638-9. [PMID: 12890824 PMCID: PMC1770018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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Hattori H. An early lesion of pulmonary carcinosarcoma: possible diagnostic problem in frozen section interpretation. J Clin Pathol 2003; 56:638. [PMID: 12890825 PMCID: PMC1770042 DOI: 10.1136/jcp.56.8.638] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Nakajima H, Hattori H, Aoki K, Katayama T, Saitoh Y, Murakawa M. Effect of milrinone on vecuronium-induced neuromuscular block. Anaesthesia 2003; 58:643-6. [PMID: 12790813 DOI: 10.1046/j.1365-2044.2003.03197.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We examined the effect of milrinone, a phosphodiesterase III inhibitor, on neuromuscular block induced by vecuronium. Thirty adult patients were randomly assigned to one of two equal groups: the milrinone group and the control group. Subjects in the milrinone group received an intravenous loading dose of milrinone 5 microg x kg-1x min-1 for 10 min, followed by an infusion at a rate of 0.5 microg x kg-1x min-1. Subjects in the control group received normal saline at a rate of 0.1 ml x kg-1 x h-1. Thirty minutes after the beginning of the infusion of milrinone, anaesthesia was induced with intravenous thiopental 4 mg x kg-1 and fentanyl 2 microg x kg-1, and was maintained with isoflurane in oxygen and nitrous oxide. Neuromuscular blockade was monitored electromyographically at the adductor pollicis muscle. The times from the administration of vecuronium 0.1 mg.kg-1 to the onset of neuromuscular block and the return of the first, second, third, and fourth response of the train-of-four were compared between the two groups. Times to the recovery of the ratio of the first twitch to the control twitch to 25%, 50% and 75%, and times to the recovery of train-of-four ratio to 25%, 50% and 75% were also compared between the two groups. The onset of neuromuscular block in the milrinone group was significantly slower than in the control group. The times to the returns of the four twitches of the train-of-four, times to recovery of the ratio of the first twitch to the control twitch to 25% and 50%, and the times to the recovery of the train-of-four ratio to 25% and 50% were significantly shorter in the milrinone group than in the control group. We conclude that milrinone delays the onset of neuromuscular blockade but hastens its recovery in anaesthetised patients receiving vecuronium.
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Shibata M, Hattori H, Sasaki T, Gotoh J, Hamada J, Fukuuchi Y. Activation of caspase-12 by endoplasmic reticulum stress induced by transient middle cerebral artery occlusion in mice. Neuroscience 2003; 118:491-9. [PMID: 12699784 DOI: 10.1016/s0306-4522(02)00910-7] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We sought to clarify the involvement of caspase-12, a representative molecule related to endoplasmic reticulum (ER) stress-induced cell-death signaling pathways, in neuronal death resulting from ischemia/reperfusion in mice. Transient focal cerebral ischemia (1 h) was produced by intraluminal occlusion of the middle cerebral artery (MCA). We assessed the expression patterns of caspase-12, Bip/GRP78, an ER-resident molecular chaperone whose expression serves as a good marker of ER stress, and caspase-7 by Western blotting and/or immunohistochemistry. Double-fluorescent staining of caspase-12 immunohistochemistry and the terminal deoxynucleotidyl transferase-mediated DNA nick-end labeling (TUNEL) method was performed to clarify the involvement of caspase-12 in cell death. We confirmed that ER stress was induced during reperfusion in our model, as witnessed by up-regulated Bip/GRP78 expression in the MCA territory. Western blot analysis revealed that caspase-12 activation occurred at 5-23 h of reperfusion, and immunoreactivity for caspase-12 was enhanced mainly in striatal neurons on the ischemic side at the same time points. We found the co-localization of caspase-12 immunoreactivity and DNA fragmentation detectable by the TUNEL method. We did not detect the presence of caspase-7 in the ER fraction at the period of caspase-12 cleavage. Our results imply that cerebral ischemia/reperfusion induces ER stress and that caspase-12 activation concurred with ER stress. Caspase-12 seems to be involved in neuronal death induced by ischemia/reperfusion. Caspase-7 is not likely to contribute to the cleavage of caspase-12 in our experimental model.
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Sato M, Kikuchi M, Ishihara M, Ishihara M, Asazuma T, Kikuchi T, Masuoka K, Hattori H, Fujikawa K. Tissue engineering of the intervertebral disc with cultured annulus fibrosus cells using atelocollagen honeycomb-shaped scaffold with a membrane seal (ACHMS scaffold). Med Biol Eng Comput 2003; 41:365-71. [PMID: 12803304 DOI: 10.1007/bf02348444] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The objective of the study was to investigate the regeneration of intervertebral discs after laser discectomy using tissue engineering procedures. Annulus fibrosus (AF) cells from the intervertebral discs of Japanese white rabbits were cultured in an atelocollagen honeycomb-shaped scaffold with a membrane seal (ACHMS scaffold), to produce a high-density, three-dimensional culture for up to 3 weeks. Although the DNA content in the scaffold increased at a lower rate than that in the monolayer culture, expression of type II collagen and glycosaminoglycan accumulation in the scaffold were at higher levels than in the monolayer. The AF cells that had been cultured in the scaffold for 7 days were allografted into the lacunae of intervertebral discs of recipients (40 rabbits, 14-16 weeks old; average weight, 3.2 kg), whose nucleus pulposus (NP) had been vaporised with an ICG dye-enhanced laser. The allografted cultured AF cells survived and produced hyaline-like cartilage. Furthermore, the narrowing of the intervertebral disc space of the cell-containing scaffold insertion groups was significantly inhibited after 12 post-operative weeks.
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Saitoh Y, Kaneda K, Hattori H, Nakajima H, Murakawa M. Monitoring of neuromuscular block after administration of vecuronium in patients with diabetes mellitus. Br J Anaesth 2003; 90:480-6. [PMID: 12644421 DOI: 10.1093/bja/aeg089] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND We studied the supramaximal current for ulnar nerve stimulation during electromyographic monitoring of onset and recovery of neuromuscular block using a neuromuscular transmission module (M-NMT Module, Datex-Ohmeda) in patients with Type 2 diabetes undergoing anaesthesia with nitrous oxide, oxygen, isoflurane and fentanyl. METHODS Thirty-six diabetic patients were randomly assigned to a post-tetanic count (PTC) group (n=17) or train-of-four (TOF) group (n=19). In addition, 30 non-diabetic patients were divided into control PTC (n=15) and TOF groups (n=15). RESULTS In the diabetic patients (diabetes PTC and diabetes TOF groups), the mean supramaximal stimulating current was significantly higher than in the non-diabetic patients (control PTC and TOF groups) (50.5 (SD 14.1) vs 33.4 (6.1) mA, P<0.01). Onset of neuromuscular block (time to disappearance of T1) after vecuronium 0.1 mg kg(-1) in the diabetic patients did not differ significantly from that in the non-diabetic patients (276 (77) vs 244 (44) s, P=0.055). Time to return of PTC1 did not differ significantly between the diabetes and control PTC groups (21.0 (12.1) vs 15.7 (5.0) min, P=0.126). Times to return of T1 and T4 in the diabetes TOF group were significantly longer than in the control TOF group (T1: 37.5 (15.2) vs 25.7 (7.6) min, P=0.01; T4: 61.4 (23.7) vs 43.5 (11.4) min, P=0.01). During recovery, PTC and T4/T1 in the diabetes PTC and TOF groups were similar to those in the control PTC and TOF groups, respectively. T1/T0 in the diabetes TOF group was significantly less than in the control TOF group, 80-120 min after vecuronium (P<0.05). CONCLUSIONS In diabetic patients, supramaximal current is higher than in non-diabetic patients. After vecuronium, onset of neuromuscular block and recovery of PTC or T4/T1 are not altered, but time to return of T1 or T4, and recovery of T1/T0 are delayed in diabetic patients.
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Arinobu T, Hattori H, Ishii A, Kumazawa T, Lee XP, Suzuki O, Seno H. Comparison of sonic spray lonization with atmospheric pressure chemical lonization as an interface of liquid chromatography-mass spectrometry for the analysis of some local anesthetics. Chromatographia 2003. [DOI: 10.1007/bf02492400] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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