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Tobias CA, Shumsky JS, Shibata M, Tuszynski MH, Fischer I, Tessler A, Murray M. Delayed grafting of BDNF and NT-3 producing fibroblasts into the injured spinal cord stimulates sprouting, partially rescues axotomized red nucleus neurons from loss and atrophy, and provides limited regeneration. Exp Neurol 2004; 184:97-113. [PMID: 14637084 DOI: 10.1016/s0014-4886(03)00394-7] [Citation(s) in RCA: 182] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Ex vivo gene therapy, utilizing modified fibroblasts that deliver BDNF or NT-3 to the acutely injured spinal cord, has been shown to elicit regeneration and recovery of function in the adult rat. Delayed grafting into the injured spinal cord is of great clinical interest as a model for treatment of chronic injury but may pose additional obstacles that are not present after acute injury, such as the need to remove an established scar, increased retrograde cell loss and/or atrophy, and diminished capacity for regeneration by neurons which may be doubly injured. The purpose of the present study was to determine if delayed grafting of neurotrophin secreting fibroblasts would have anatomical effects similar to those seen in acute grafting models. We grafted a mixture of BDNF and NT-3 producing fibroblasts or control fibroblasts into a complete unilateral cervical hemisection after a 6-week delay. Fourteen weeks after delayed grafting we found that both the neurotrophin secreting fibroblasts and control fibroblasts survived, but that only the neurotrophin secreting grafts provided a permissive environment for host axon growth, as indicated by immunostaining for RT-97, a marker for axonal neurofilaments, GAP-43, a marker for elongating axons, CGRP, a marker for dorsal root axons, and 5-HT, a marker for raphe spinal axons, within the graft. Anterograde tracing of the uninjured vestibulospinal tract showed growth into neurotrophin producing transplants but not into control grafts, while anterograde tracing of the axotomized rubrospinal tract showed a small number of regenerating axons within the genetically modified grafts, but none in control grafts. The neurotrophin expressing grafts, but not the control grafts, significantly reduced retrograde degeneration and atrophy in the injured red nucleus. Grafts of BDNF + NT-3 expressing fibroblasts delayed 6 weeks after injury therefore elicit growth from intact segmental and descending spinal tracts, stimulate modest regenerative growth by rubrospinal axons, and partially rescue axotomized supraspinal neurons and protect them from atrophy. The regeneration of rubrospinal axons into delayed transplants was much less than has been observed when similar transplants were placed acutely into a lateral funiculus or, after a 4-week delay, into a hemisection lesion. This suggests that the regenerative capacity of chronically injured red nucleus neurons was markedly diminished. The increased GAP43 reactivity in the corticospinal tracts ipsilaterally and contralaterally to the combination grafts suggests that these axons remain responsive to the neurotrophins, that the neurotrophins may stimulate both regenerative and sprouting responses, and that the grafted cells continue to secrete the neurotrophins.
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Muramoto T, Shibata M, Nakanishi N. Relationships between Muscle α-Tocopherol Concentrations and Metmyoglobin Percentages during Display of Six Muscles of Japanese Black Steers. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2004. [DOI: 10.5713/ajas.2004.1014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Saitoh Y, Kato A, Ninomiya H, Baba T, Shibata M, Mashimo T, Yoshimine T. Primary motor cortex stimulation within the central sulcus for treating deafferentation pain. ACTA NEUROCHIRURGICA. SUPPLEMENT 2003; 87:149-52. [PMID: 14518543 DOI: 10.1007/978-3-7091-6081-7_31] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Nine patients with post-stroke pain, six with brachial plexus injuries, two with phantom limb pain, one with spinal cord injury, and one with brain stem injury were treated with a modified motor cortex stimulation (MCS) protocol. Preoperative pharmacological tests were performed with phentolamine, lidocaine, ketamine, thiopental, morphine, and placebo. We placed a grid electrode in the subdural space to decide upon the best stimulation point for pain relief over a few weeks with the purpose of determining the placement of a Resume electrode. In five patients, Resumes were implanted in the interhemispheric fissure to reduce lower extremity pain. In five other patients, Resumes were placed within the central sulcus to stimulate area 4 and area 3b. In addition, electrodes were also placed on the surface of the precentral gyrus. Fourteen of the 19 patients showed pain reduction (6 excellent, 3 good, and 5 fair) using the MCS with our results indicating area 4 within the central sulcus to be the optimal stimulation point for pain relief. We speculate that conventional method may sometimes fail to stimulate area 4 and that focal stimulation of the primary motor cortex within the central sulcus may improve the efficacy of this treatment. Our pharmacological tests show that patients with ketamine sensitivity seem to be good candidates for MCS. Test stimulation with a subdural multi-grid electrode and Resumes in the cetral sulcus were helpful in locating the best stimulation point for pain relief.
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Kato N, Ito K, Kimura K, Shibata M. Ferguson Smith type multiple keratoacanthomas and a keratoacanthoma centrifugum marginatum in a woman from Japan. J Am Acad Dermatol 2003; 49:741-6. [PMID: 14512932 DOI: 10.1067/s0190-9622(03)00454-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We report a case of multiple keratoacanthomas on the sun-exposed skin of a 37-year-old woman from Japan. She had experienced 4 similar episodes of evolution and involution of multiple keratoacanthomas during a period of 10 years since she was 27 years old. She was given the diagnosis of Ferguson Smith type keratoacanthoma. This is the seventh Japanese case of Ferguson Smith type keratoacanthoma described in detail in the literature. In addition, the patient was found to have an annular, coral reef-like eruption on the front of her neck, which was diagnosed as a keratoacanthoma centrifugum marginatum. A combination of different variants of keratoacanthoma in 1 patient is uncommon, and only 2 patients with the same combination of lesions, as that seen in our patient, have been reported. Our patient was treated by a relatively low dose (0.5 mg/kg body weight) of etretinate. Both variants of keratoacanthoma showed good response to the treatment. Effectiveness of etretinate for treating keratoacanthoma centrifugum marginatum has only been reported in a few cases. Our patient had no relapse during a period of 15 months after cessation of etretinate treatment.
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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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Kakitsubata Y, Theodorou SJ, Theodorou DJ, Shibata M, Yuge M, Yuki Y, Hatakeyama K, Yokouchi T. MR imaging of uncommon recurrence of fibrolipomatous hamartoma of the ulnar nerve. Acta Radiol 2003. [PMID: 12752006 DOI: 10.1034/j.1600-0455.2003.00056.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We present the MR and histopathologic findings of fibrolipomatous hamartoma (FLH) of the ulnar nerve in a 54-year-old woman, a lipomatous process that rarely affects the ulnar nerve. The case illustrated is further unusual as a local soft tissue recurrent mass developed over a remarkably long course of the disease.
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Shibata M, Shima M, Misu H, Okimoto Y, Giddings JC, Yoshioka A. Management of haemophilia B inhibitor patients with anaphylactic reactions to FIX concentrates. Haemophilia 2003; 9:269-71. [PMID: 12694516 DOI: 10.1046/j.1365-2516.2003.00772.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Allergic reactions to concentrates containing factor IX (FIX) are serious complications in the treatment of haemophilia B patients with inhibitor. We have established a therapeutic protocol for such cases using an initial skin test followed by step-wise infusions of FIX concentrates under hydrocortisone cover. We have successfully treated three patients whose treatment with FIX had been suspended.
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Kishi R, Miura T, Kihara H, Asano T, Shibata M, Yosomiya R. Fast pH-thermo-responsive copolymer hydrogels with micro-porous structures. J Appl Polym Sci 2003. [DOI: 10.1002/app.11996] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhang G, Ohsawa Y, Kametaka S, Shibata M, Waguri S, Uchiyama Y. Regulation of FLRG expression in rat primary astroglial cells and injured brain tissue by transforming growth factor-beta 1 (TGF-beta 1). J Neurosci Res 2003; 72:33-45. [PMID: 12645077 DOI: 10.1002/jnr.10559] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Follistatin-related gene (FLRG) is a member of the follistatin family of proteins and interacts with transforming growth factor (TGF) superfamily proteins like follistatin. To understand the expression level of FLRG in brain tissue, we examined whether primary neurons and glial cells from rat embryos express FLRG mRNA and produce its protein product. FLRG and follistain mRNAs were mainly expressed in astroglial cells, while activin A mRNA was abundant in primary neurons. TGF-beta1 highly enhanced expression levels of FLRG mRNA in astroglial cells, compared with those of follistatin and activin A mRNAs. Particularly, TGF-beta1 facilitated the secretion of FLRG protein from primary astroglial cells in a dose-dependent manner. Moreover, changes in expression levels of FLRG mRNA and protein in brain tissue were also analyzed after a penetrating injury, using quantitative polymerase chain reactin (PCR) and immunohistochemical methods. Expression levels of FLRG mRNA were significantly increased in damaged regions after penetrating injury together with those of activin A and TGF-beta1 mRNAs. Immunohistochemical observations showed that positive signals of FLRG protein were colocalized in glial fibrillary acidic protein-positive reactive astroglial cells located in damaged regions after a penetrating injury. The expression of follistatin mRNA rather decreased in damage regions after the brain injury. These results suggest that FLRG is synthesized in and secreted from astroglial cells. In particular, FLRG, but not follistatin, may play a role in the regulation of activin A in brain wound healing in response to TGF-beta1.
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Muramoto T, Shibata M, Nakanishi N. Effect of Slaughter Age on Beef Color Stability during Display of Four Muscles from Japanese Black Steers. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2003. [DOI: 10.5713/ajas.2003.1364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Onodera K, Kawaguch M, Shibata M, Kagawa M, Kojima J, Shimizu K, Yoneko M, Wachi M. Toxicological study of a glucose-added acetic acid maintenance infusion solution (VEEN 3G Inj.) local irritation test. DRUGS UNDER EXPERIMENTAL AND CLINICAL RESEARCH 2002; 28:17-25. [PMID: 12073764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The local irritating effect of Veen 3G Inj. (glucose-added acetic acid maintenance infusion solution) was examined in male rabbits. We studied the local irritating effect of the infusion solution compared with that of Ringer's solution, 5% sulfobromophthalein sodium injection, distilled water for injection or glucose-added Ringer's solution. In the vascular irritation test, macroscopical and histopathological changes induced by the infusion solution were not observed in the vessels. Moreover, in the hemolytic test, hemolysis of rabbit erythrocyte was not observed in the mixture with the infusion solution. In the present study, no change suggesting irritation by the infusion solution was observed in the in vivo vascular irritation test using the auricular vein of rabbits or in the in vitro hemolytic test using rabbit erythrocyte. In conclusion, in clinical use the infusion solution produces extremely slight adverse effects, such as vessel pain and phlebitis on the injection site.
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Oshima Y, Eri T, Shibata M, Sunakawa H, Usui A. Fabrication of Freestanding GaN Wafers by Hydride Vapor-Phase Epitaxy with Void-Assisted Separation. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/1521-396x(200212)194:2<554::aid-pssa554>3.0.co;2-b] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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138
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Shibata M, Moritani T, Miyawaki T, Hayashi T, Nakao K. Exercise prescription based upon cardiac vagal activity for middle-aged obese women. Int J Obes (Lond) 2002; 26:1356-62. [PMID: 12355331 DOI: 10.1038/sj.ijo.0802131] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2001] [Revised: 02/27/2002] [Accepted: 05/27/2002] [Indexed: 11/09/2022]
Abstract
OBJECTIVE The purposes of this study were to examine a new method to determine exercise intensity for obese people based on the cardiac vagal activity and to determine the effect of this approach on myocardial stress. SUBJECTS Forty-three middle aged obese female volunteers (age 43.7+/-6.5 y; height 1.56+/-0.05 m; body mass 66.5+/-9.3 kg; body mass index 27.3+/-2.8 kg m(2); percentage body fat 40.7+/-5.9%). MEASUREMENT In the first experiment, 43 subjects performed a ramp exercise test on a bicycle ergometer with measurement of ECG and gas exchange parameters. In the second experiment, 11 subjects performed 45 min of constant walking exercise on a treadmill at a level corresponding to exercise intensity determined by vagal activity obtained from a ramp bicycle test. Blood pressure, endothelin 1 (ET-1), catecholamine, atrial natriuretic peptide (ANP), and brain natriuretic peptide (BNP) were measured before and after exercise. RESULTS The heart rate variability power decreased with increasing work rate, and changed little after reaching individual-specific work rate. We presumed that vagal activity disappeared at this point and that the heart rate at this exercise intensity was determined as the vagal activity threshold (T(VA)). The results showed a significant positive correlation (r=0.742, P<0.0001) between T(VA) and ventilatory threshold (VT) heart rates, although the mean heart rate of T(VA) (114.3+/-8.5 beats/min) was significantly lower (P<0.001) than that at VT (119.0+/-11.7), suggesting the cardiac vagal withdrawal occurred prior to the onset of lactate acidosis (lactic acid accumulation). Furthermore, exercise intervention experiment at T(VA) indicated that ET-1, catecholamine and BNP levels were not significantly different before and after exercise. However, ANP levels increased significantly after exercise (pre-exercise 18.6+/-5.38 vs post-exercise 44.0+/-24.87 pg/ml, P<0.001), which in turn brought about a significant post-exercise reduction in the blood pressure (SBP 117.6+/-13.7 vs 110.5+/-7.4 mmHg, P<0.05; DBP 78.6+/-6.7 vs 73.5+/-6.6 mmHg, P<0.01). CONCLUSION Our data suggest that it is possible to determine the exercise intensity (T(VA)) on the basis of cardiac vagal response. These results also suggest that exercise at T(VA) level is a safe exercise intensity in the light of cardiac stress, and that T(VA) may be recommended for obese people who might possess lower cardiac sympatho-vagal activity.
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Kamei J, Onodera K, Kawaguchi M, Shibata M, Kagawa M, Wachi M, Kojima J. Toxicological study of a new maintenance fluid, Veen 3G, in rats. METHODS AND FINDINGS IN EXPERIMENTAL AND CLINICAL PHARMACOLOGY 2002; 24:493-6. [PMID: 12500428 DOI: 10.1358/mf.2002.24.8.705069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A study of the different volume and infusion rates of a new maintenance fluid, Veen 3G, on the general conditions of rats was investigated during the 14 days after infusion. In Experiment I, 100 ml/kg and 200 ml/kg of Veen 3G were infused at a rate of 300 ml/kg/h in male and female rats. Results were compared with those for Gurunon Ringer solution (GRS) in male and female rats. We observed only transient polyuria in animals administered by each dose of Veen 3G and GRS for 0-15 min after infusion. Necropsy was not observed in any of the animals tested 14 days after infusion. In Experiment II, 200 ml/kg of Veen 3G was infused at rates of 200, 400, 800 and 1600 ml/kg/h in male rats. At 800 and 1600 ml/kg/h, irregular respiration and decrease in movement were observed concomitantly with polyuria. Three out of 4 rats died immediately after the infusion of Veen 3G at a rate of 1600 ml/kg/h, and one rat was still alive 14 days after the infusion. In this experiment, 200 ml/kg Veen 3G was safe when we infused at a rate of less than 400 ml/kg/h in male rats. Since this rate is about 27-80 times higher than that used clinically in maintenance treatment, Veen 3G is suggested to be safe, with the exception of polyuria, in clinical situations at the standard infusion rate (5-15 ml/kg/h).
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Miyachi K, Horigome T, Matsuoka Y, Irimajiri S, Shibata M, Asada K, Hankins RW. A male patient who developed late-onset primary biliary cirrhosis presenting with antinuclear envelope antibodies. Mod Rheumatol 2002; 12:246-9. [PMID: 24387066 DOI: 10.3109/s101650200043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract An 81-year-old man who had previously shown high levels of alkaline phosphatase (ALP), γ-glutamyltransferase (GTP), and total bilirubin presented with acute liver damage. He was positive for serum anti-gp210 and anti-p62 antibodies, but negative for serum antimitochondrial antibody. A liver biopsy revealed massive interstitial fibrosis and pseudolobulus, which were compatible with a diagnosis of primary biliary cirrhosis (PBC) at Scheuer's stage 4. He was given ursodeoxycolic acid at 600 mg/day. However, his condition deteriorated, and he eventually died of hepatic insufficiency in a state of malnutrition. We hypothesize that the presence of anti-gp210 and anti-p62 complex protein antibodies, rather than that of antimitochondrial antibodies, was correlated with the progression of PBC in this particular case.
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Fujimoto Y, Matsushima M, Tsuzuki K, Okada M, Shibata M, Yanase Y, Usui K, Nagashima M. Nephropathy of cyanotic congenital heart disease: clinical characteristics and effectiveness of an angiotensin-converting enzyme inhibitor. Clin Nephrol 2002; 58:95-102. [PMID: 12227694 DOI: 10.5414/cnp58095] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIMS Nephropathy has long been recognized as a potential complication of cyanotic congenital heart disease (CCHD). There have been few large-scale studies or clinical reports on renal impairment in patients with CCHD; similarly, very few studies have examined the drug treatment of nephropathy in CCHD. We examined the clinical characteristics and effectiveness of enalapril, an angiotensin-converting enzyme inhibitor (ACE-I), in patients with CCHD complicated with significant proteinuria. MATERIALS AND METHODS The clinical records of 37 patients with CCHD were evaluated; all were older than 10 years of age (median 19, range from 10 to 27) and had regular check-ups, including urinalysis. The treatment criteria for enalapril administration included significant proteinuria (urinary excretion > 1.0 g/24 h), stable cardiac condition and blood pressure within the normal range. RESULTS Eleven patients (29.7%) had persistent proteinuria, 6 patients met the enalapril treatment criteria and 5 patients were treated for more than 12 months. Enalapril apparently reduced the urinary protein excretion in 4 of the 5 patients (80%). No consistent improvement of renal function, as evidenced in the glomerular filtration rate (GFR), renal plasma flow (RPF) or filtration fraction (FF) was found in these patients, but neither were any significant adverse effects noted. CONCLUSION The incidence of nephropathy among patients with CCHD was about 30%, which was consistent with previous studies. It is worth considering the use of ACE-I when nephropathy accompanies CCHD.
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Mokuda O, Shibata M, Ooka H, Okazaki R, Sakamoto Y. Glucagon is paradoxically secreted at high concentrations of glucose in rat pancreas perfused with diazoxide. DIABETES, NUTRITION & METABOLISM 2002; 15:260-4. [PMID: 12416665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
To study the role of B-cells in the regulation of glucagon secretion by glucose, the rat pancreas was perfused with 0.4 mmol/l diazoxide. Perfusate glucose was 5 mmol/l of a basal concentration, and then was decreased to 1 mmol/l, or was increased to 15 mmol/l. Insulin secretion was suppressed by diazoxide below the detectable level at each glucose concentration. Glucagon secretion was increased two-fold during the glucopenic perfusion without diazoxide, but was not changed at a low glucose concentration in the presence of diazoxide. During the glucose-excessive perfusion for 15 min, glucagon secretion was lowered from 0.69 +/- 0.17 pmol at 5 mmol/l glucose to 0.36 +/- 0.10 pmol at 15 mmol/l glucose (p < 0.05) without diazoxide, whereas that was inversely increased from 0.55 +/- 0.14 at 5 mmol/l glucose to 0.85 +/- 0.13 pmol at 15 mmol/l glucose (p < 0.05) in the presence of diazoxide. These results suggest that appropriate insulin secretion is necessary for the normal responses of glucagon secretion to hypoglycemia and hyperglycemia in the non-diabetic rat pancreas.
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Kataoka D, Kadokura M, Nonaka M, Yamamoto S, Asano M, Maruta K, Takeuchi S, Shibata M, Shiojiri Y, Itagaki T, Takaba T, Kubota Y. [Endobronchial brachytherapy for intra-luminal recurrence after lung cancer resection]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2002; 55:758-62. [PMID: 12174619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
A 63-year-old man who had squamous cell carcinoma in left lung was received left lower lobectomy with lymph node dissection (pT3N0M0). Twenty months after surgery, the patient showed bloody sputum and bronchofiberscopy revealed intra-luminal recurrence on trachea. Endobronchial brachytherapy in combination with external beam radiotherapy was selected and complete remission was achieved. After the brachytherapy, bronchitis was observed and was healed 23 months after the therapy.
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Kojima Y, Asai M, Shibata M, Kawade K, Taniguchi A, Osa A, Koizumi M, Sekine T. Decay scheme of 126La isomers. Appl Radiat Isot 2002; 56:543-56. [PMID: 11922422 DOI: 10.1016/s0969-8043(01)00248-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The beta+/EC decay of 126La produced by the 94Mo(36Ar, 3pn) reaction has been studied using the on-line isotope separator connected to an AVF cyclotron. Gamma-ray singles, gamma-gamma angular correlation and internal conversion electron measurements were carried out. From analysis of these data, 33 new levels in 126Ba were found and the decay scheme containing 137 gamma-rays and 50 excited states was constructed. The probable spin and parity of the two beta-decaying states in 126La were found to be 4+/-, 5+/- for the high-spin isomer with a half-life of 54(2) s and 0-, 1+/-, 2- for the low-spin isomer with a half-life shorter than 50 s.
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Saito Y, Sakuma H, Shibata M, Okinaka T, Isaka N, Tomemori T, Takeda K, Nakano T, Higgins CB. Assessment of coronary flow velocity reserve using fast velocity-encoded cine MRI for noninvasive detection of restenosis after coronary stent implantation. J Cardiovasc Magn Reson 2002; 3:209-14. [PMID: 11816617 DOI: 10.1081/jcmr-100107469] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
PURPOSE Serial change of the coronary flow velocity reserve was evaluated with fast velocity-encoded cine magnetic resonance imaging (MRI) for noninvasive detection of restenosis after coronary stent implantation. METHOD In total, 60 MRI flow studies were performed in 10 patients with coronary artery disease who undersvent elective successful stent implantation to the lesion in the proximal left anterior descending artery. Flow velocities in the segment that was distal to the stent were measured before and after intravenous injection of dipyridamole. MRI measurements of coronary flow velocity reserve were repeated every 4 weeks for 6 months, and follow-up angiography was performed 6 months after the procedure. RESULTS In patients without restenosis (n = 7, % diameter stenosis: 27.8%+/-7.1) at follow-up angiography, the coronary flow velocity reserve remained normal during the 6-month follow-up time. The flow velocity reserve was 2.31+/-0.30 at 1 month and 2.52+/-0.25 at 6 months after stent implantation (p = NS). In contrast, the coronary flow velocity reserve showed a significant decrease after 4 months in patients with restenosis (n = 3, % diameter stenosis: 66.3%+/-8.1) at follow-up angiography. The flow velocity reserve was 2.26+/-0.49 at 1 month and 1.52+/-0.09 at 6 months after stent implantation (p < 0.05). CONCLUSION Fast velocity-encoded cine MRI is a technique that shows promise in providing non-invasive detection of restenosis of coronary stent implantation.
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Shibata M, Uryu K. Gravitational Waves from the Merger of Binary Neutron Stars in a Fully General Relativistic Simulation. ACTA ACUST UNITED AC 2002. [DOI: 10.1143/ptp.107.265] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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147
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Asai M, Sakama M, Tsukada K, Ichikawa S, Haba H, Nishinaka I, Nagame Y, Goto S, Akiyama K, Toyoshima A, Kojima Y, Oura Y, Nakahara H, Shibata M, Kawade K. Decay Studies of Neutron-deficient Am, Cm, and Bk Nuclei Using an On-line Isotope Separator. ACTA ACUST UNITED AC 2002. [DOI: 10.14494/jnrs2000.3.187] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Hayashi T, Yagi H, Suzuki H, Nonaka Y, Nomura T, Sakurai Y, Shibata M, Matsumoto M, Yamamoto Y, Fujimura Y. Low-dosage intravenous immunoglobulin in the management of a patient with acquired von Willebrand syndrome associated with monoclonal gammopathy of undetermined significance. PATHOPHYSIOLOGY OF HAEMOSTASIS AND THROMBOSIS 2002; 32:33-9. [PMID: 12214161 DOI: 10.1159/000057286] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We report herein the case of a 69-year-old Japanese man with acquired von Willebrand syndrome associated with monoclonal gammopathy of undetermined significance who developed IgG1-kappa antibodies against von Willebrand factor (VWF). The patient was urged to undergo tooth extractions because of alveolar pyorrhea, and a low-dosage intravenous immunoglobulin (IV-Ig) therapy (0.3 g of IgG/kg/day for 3 days) was chosen for him. On the 4th day after the infusion, VWF antigen and VWF ristocetin cofactor increased to 40 and 78% of the control, respectively, and dental extractions were performed successfully. On the 7th day, these values reached a maximum, i.e. 95 and 160% of the control, respectively. Then, they quickly decreased to 35 and 75% on the 10th day, and 6 months later, they became 16 and <3% of the control, respectively. Upon analysis of plasma VWF multimers (VWFMs) in this patient, those with large to medium molecular masses more selectively disappeared before the IV-Ig infusion than did those with small molecular masses. On the 4th day, the pattern of VWFMs was completely normalized and appeared to persist until the 10th day. Six months later, a small amount of large to medium-sized VWFMs was still present, but at 7-8 months, the pattern of VWFMs became almost the same as that before infusion. Throughout the patient's clinical course, the activity of plasma VWF-cleaving protease, which specifically cleaves the Tyr842-Met843 bond of the subunit and reduces its multimeric sizes, was quite normal (95-119%). These results provided consistent evidence that the selective absence of VWFMs with large to medium molecular masses in this patient is caused by the heightened clearance of a complex of IgG inhibitor and VWFMs from the circulation, presumably through IgG binding to the Fc receptor of macrophages. Furthermore, these results also indicated that a low-dosage IV-Ig therapy is effective enough for hemostatic management for programmed surgery.
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149
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Kawashima T, Sumamal W, Pholsen P, Chaithiang R, Boonpakdee W, Kurihara M, Shibata M. Feeding Value of Sugarcane Stalk for Cattle. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2002. [DOI: 10.5713/ajas.2002.55] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zheng G, Graham A, Shibata M, Missert JR, Oseroff AR, Dougherty TJ, Pandey RK. Synthesis of beta-galactose-conjugated chlorins derived by enyne metathesis as galectin-specific photosensitizers for photodynamic therapy. J Org Chem 2001; 66:8709-16. [PMID: 11749598 DOI: 10.1021/jo0105080] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A first report on the synthesis and biological evaluation of the beta-galactose-conjugated purpurinimides (a class of chlorins containing a six-membered fused imide ring system) as Gal-1 (galectin-1) recognized photosensitizers, prepared from purpurin-N-propargylimide via enyne metathesis, is discussed. On the basis of examination of the available crystal structure of the galectin-1 N-acetyllactose amine complex, it was considered that the chlorin-based photosensitizers could be introduced into a carbohydrate skeleton to expand the repertoire of the galectin-1-specific ligands. Preliminary molecular modeling analysis utilizing the modeled photosensitizers and the available crystal structures of galectin-carbohydrate complexes indicated that addition of the photosensitizer to the carbohydrate moiety at an appropriate position does not interfere with the galectin-carbohydrate recognition. Under similar drug and light doses, compared to the free purpurinimide analogue, the purpurinimides conjugated either with galactose or with lactose (Gal(beta1-4)-Glc) produced a considerable increase in photosensitizing efficacy in vitro. This indicates the possibility for development of a new class of specific photosensitizers for photodynamic therapy (PDT) based on recognition of a cellular receptor.
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