3851
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Taniguchi T, Hamasaki Y, Suzuki K. [Vesico-uterine fistula after delivery: a case report]. HINYOKIKA KIYO. ACTA UROLOGICA JAPONICA 1995; 41:475-8. [PMID: 7645456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A case of vesico-uterine fistula which occurred after natural childbirth is reported. A 33-year-old woman was admitted in February, 1993, complaining of urinary leakage from vagina immediately after natural childbirth. Excretory urogram showed an oval shaped extravasation outside the bladder, suggesting that the contrast medium went into the luminal space of the uterus. Subsequent cystoscopy showed a fistula on the posterior wall, probably the orifice of the fistula to the space. As these findings strongly suggested the vesico-uterine fistula, surgical operation was done. Rupture of the uterus was observed. Then hysterectomy was done because the rupture could not be repaired. Vesico-uterine fistula was thought to be the result of the rupture of uterus. Bladder side fistula was successfully repaired. Sixty eight cases of vesico-uterine fistula, including this case, in the Japanese literature have been reviewed and discussed the etiology, symptom and treatment.
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3852
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Suzuki K, Kawazu T, Mita T, Takahashi H, Itoh R, Toda K, Kuroiwa T. Cytokinesis by a contractile ring in the primitive red alga Cyanidium caldarium RK-1. Eur J Cell Biol 1995; 67:170-8. [PMID: 7664758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
To better understand the mechanism of cytokinesis in eukaryotes, the behavior of the contractile ring in the two unicellular primitive red algae Cyanidioschyzon merolae and Cyanidium caldarium RK-1, which have the smallest genome size among eukaryotes, was examined by fluorescein isothiocyanate (FITC)-phalloidin fluorescence microscopy, fluorometry using a video-intensified microscope photoncounting system, transmission electron microscopy and immunoblotting techniques. Cells in each alga contained one nucleus, one mitochondrion and one chloroplast, which were aligned in that order. During cytokinesis in C. merolae, a contractile ring was not observed by fluorescence microscopy or by transmission electron microscopy. In contrast, in C. caldarium RK-1, a contractile ring appeared at the equatorial region of the dividing cells and began to contract from the side of the chloroplast. During contraction of this ring, the total fluorescent intensities due to FITC-phalloidin remained constant. Electron microscopy revealed outer and inner bands approximately 80 nm wide and 9 nm thick which ran parallel to each other just beneath the cell membrane. These bands were visible at the equator of the cell just before the initiation of cytokinesis and constricted from the pole of the chloroplast. Both bands increased in width as cleavage progressed. The inner ring consisted of a bundle of approximately 20 actin-like filaments which were arranged as a raft. In the outer ring, such fine filaments were not visible. It seems likely that the bundle of filaments, known as the contractile ring, is composed of two different elements: an inner band of actin filaments and an outer band of unknown materials.(ABSTRACT TRUNCATED AT 250 WORDS)
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3853
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Suzuki K. A histological study on experimental autoimmune myocarditis with special reference to initiation of the disease and cardiac dendritic cells. Virchows Arch 1995; 426:493-500. [PMID: 7633659 DOI: 10.1007/bf00193173] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The precise mechanism of myosin-induced autoimmune myocarditis is unknown. The purpose of the present study was to define the immunohistological and ultrastructural characteristics of the infiltrating cells, especially in the initial phase of the myocarditis. It was demonstrated that OX6-positive dendritic cells first infiltrated the cardiocytes on day 13 after immunization. After day 17, OX6-positive cells, which possessed elongated irregular-shaped processes on the cell surface but contained few phago-lysosomes in the cytoplasm, were located at the margin of an inflammatory field and inserted their processes into the sarcoplasm of cardiocytes. The central portion of the inflammatory field was occupied by ED1-positive inflammatory macrophages, which were rich in phagosomes and which were in contact with degenerating cardiocytes. No evidence was obtained which suggested that lymphocytes directly injured the cardiocytes. These results demonstrated ultrastructural evidence that the type of infiltrating cell that first injures cardiocytes is the cardiac dendritic cell. Inflammatory macrophages thereafter serve as scavengers of degenerating cardiocytes.
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3854
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Hataya Y, Kosaka K, Yamazaki M, Asai S, Suzuki K. Reconstruction of burned nasal alae with vascular island skin flaps pedicled on the infraorbital vessels. Burns 1995; 21:313-5. [PMID: 7662137 DOI: 10.1016/0305-4179(95)93870-p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A 31-year-old man suffered burns to the forehead, alar grooves and forearms. Vascular island skin flaps, with the infraorbital vessels as the pedicle, were used to reconstruct the burned nasal alae. The case is reported here and the relevant literature is reviewed.
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3855
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Suzuki K, Iwabuchi N, Kuramochi S, Nakanoma J, Suzuki Y, Serizawa H, Hamada Y, Kumagai N, Takahashi M, Tsuchimoto K. Aspergillus aneurysm of the middle cerebral artery causing a fatal subarachnoid hemorrhage. Intern Med 1995; 34:550-3. [PMID: 7549141 DOI: 10.2169/internalmedicine.34.550] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
A rare case of Aspergillus aneurysm of the central nervous system (CNS) leading to subarachnoid hemorrhage (SAH) is reported. An 83-year-old woman developed visual disturbance and headache. Computed tomographic scans showed no evidence of aneurysm or tumor in the intracranium. She suddenly died from SAH. Autopsy revealed massive SAH due to ruptured Aspergillus aneurysm of the middle cerebral artery. Aspergillus was suggested to have extended from the paranasal sinuses. Aspergillosis of CNS should be considered in patients with neurological symptoms such as visual disturbance and trigeminal neuralgia, especially in cases of the aged or immunocompromised.
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3856
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Aoki K, Suzuki K, Sugano T, Tasaka T, Nakahara K, Kuge O, Omori A, Kasai M. A novel gene, Translin, encodes a recombination hotspot binding protein associated with chromosomal translocations. Nat Genet 1995; 10:167-74. [PMID: 7663511 DOI: 10.1038/ng0695-167] [Citation(s) in RCA: 156] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We have identified a novel gene, Translin, encoding a protein which specifically binds to consensus sequences at breakpoint junctions of chromosomal translocations in many cases of lymphoid malignancies. The encoded protein, Translin, is a previously undescribed type with no significant similarity to known proteins. In the native form, Translin polypeptides form a multimeric structure which is responsible for its DNA binding activity. Nuclear localization of Translin is limited to lymphoid cell lines, raising the intriguing possibility that nuclear transport of Translin is regulated in a physiologically significant way such that active nuclear transport is associated with the lymphoid specific process known as Ig/TCR gene rearrangement.
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3857
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Yamakoshi M, Yamamoto T, Suzuki K, Yamamoto T. [Four cases of acute myositis associated with influenza A infection in the elderly]. KANSENSHOGAKU ZASSHI. THE JOURNAL OF THE JAPANESE ASSOCIATION FOR INFECTIOUS DISEASES 1995; 69:752-6. [PMID: 7616021 DOI: 10.11150/kansenshogakuzasshi1970.69.752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In nursing home belonging to our hospital, influenza like syndromes were recognized in 40 of 250 cases (16%) in 1994, and 5 cases were admitted to our hospital. On admission, three patients were unable to walk, and creatine phosphokinase levels were elevated in all patients, ranging from 337 IU/l to 20,672 IU/l. There were normal test findings for electrocardiography, ultrasonic cardiography. Three patients showed a significant antibody titer fall (Hemagglutinin Inhibition) in six months. The other patient did not show it, but his symptom was compatible with influenza. All patients recovered rapidly without sequelae. We reported four cases in the elderly of acute myositis associated with influenza A (H3N2) infection.
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3858
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Suzuki K, Tatsuno K, Mimori S, Murakami Y, Doi S, Takahashi Y, Kikuchi T, Mori K. Does hypoplasia of one pulmonary artery preclude a definitive repair in pulmonary atresia, intact ventricular septum, and hypoplastic right ventricle? Heart Vessels 1995; 10:158-62. [PMID: 7673087 DOI: 10.1007/bf01744484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Twins with pulmonary atresia, intact ventricular septum, and hypoplastic right ventricle associated with underdeveloped and discontinuous left pulmonary artery are described. Operations to connect the left pulmonary artery to the main pulmonary trunk, with subsequent biventricular repair assisted by bidirectional cavopulmonary anastomosis and atrial fenestration were performed. Follow-up catheterization proved spontaneous closure of the fenestration in one patient. Both patients have been in a satisfactory condition for 3 years since operation.
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3859
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Aou S, Suzuki K, Oomura Y. [Regulation of food intake and appetite: overview]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 1995; 53 Suppl:13-8. [PMID: 7563674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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3860
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Orito E, Mizokami M, Suzuki K, Ohba K, Ohno T, Mori M, Hayashi K, Kato K, Iino S, Lau JY. Loss of serum HCV RNA at week 4 of interferon-alpha therapy is associated with more favorable long-term response in patients with chronic hepatitis C. J Med Virol 1995; 46:109-15. [PMID: 7636496 DOI: 10.1002/jmv.1890460205] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
To determine the virological factors associated with a favorable long-term response to interferon-alpha (IFN) therapy in chronic hepatitis C virus (HCV) infection, 61 Japanese patients with chronic HCV infection were treated with IFN for 24 weeks (780 million units in total) and followed for 8 to 16 months after cessation of therapy. Ten patients dropped out because of severe side effects. Of the 51 patients who completed IFN therapy, 23 showed complete and sustained response (CR --> SR), 13 complete response with early relapse (CR --> Rel), and 15 no response to IFN (NR). For the pretreatment serum HCV RNA level, 20/23 who had CR --> SR had < 10(6) eq/ml compared to 3/13 CR --> Rel and 1/15 NR (P < 0.01). Serologically defined HCV type 2 infection was also associated with a better opportunity to develop CR --> SR compared to CR --> Rel of NR (P < 0.01). Loss of serum HCV RNA at week 4 of IFN therapy was also associated with a more favorable long-term response [17/19 CR --> SR were HCV RNA negative compared to 3/11 CR --> Rel (P < 0.01) and 2/13 NR (P < 0.01)]. In contrast, normalization of serum alanine aminotransferase (ALT) levels at week 4 was found in 9/19 CR --> SR compared to 8/11 CR --> Rel (P = NS), and 0/13 in NR (P < 0.01). Six months after cessation of IFN therapy, 3/25 CR --> SR patients were HCV RNA positive despite normalization of serum ALT levels. These data indicated that in addition to pretreatment serum HCV RNA levels and HCV type, the kinetics of response to IFN (at week 4) were also predictive of subsequent long-term response to IFN in patients with chronic HCV infection.
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3861
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Suzuki K, Naganuma S, Mochizuki M, Shiraishi M, Nakaji S, Sugawara K, Totsuka M, Sato K. [Differential patterns of the number and proportion of blood leukocytes following endurance exercise of moderate, strenuous and severe conditions]. Nihon Eiseigaku Zasshi 1995; 50:631-6. [PMID: 7630031 DOI: 10.1265/jjh.50.631] [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: 01/26/2023]
Abstract
A study was conducted to elucidate the acute effects of endurance exercise on white blood cells by setting three conditions of different intensity and duration; (a) an upper limit of aerobic exercise for health promotion and (b) superior limits within endurance exercise tolerance for untrained persons were prescribed separately for the same healthy untrained male student volunteers (n = 10) at intensities of 85% and 95% of the individual anaerobic threshold (AT) values for 1 h and 1.5 h, respectively, on a bicycle ergometer. In addition, (c) participants in a 100-km marathon race (n = 20) who continued running for 10-13 h were examined. Every condition caused significant leukocytosis due to predominant neutrophilia and, to a minor degree, a significant increase in monocyte number, the magnitude of which depended on the severity of endurance workload and persisted even 1 h after the termination of exercise. Simultaneously, microscopic evaluation of blood smears revealed the occurrence of an increased proportion of band neutrophils and a decreased proportion of hypersegmented neutrophils (shift to the left) following exercise in condition (b) but not in (a), suggesting that neutrophils are mobilized partly from the bone marrow reserve to the circulation. On the other hand, peripheral lymphopenia was observed after the termination of endurance exercise. These phenomena closely mimicked the known effects of exogenous glucocorticoid administration, suggesting an association with endogenous stress hormone (cortisol) secretion following strenuous exercise.(ABSTRACT TRUNCATED AT 250 WORDS)
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3862
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Nakajima K, Fisher D, Kawakubo T, Nakanishi H, Ogata A, Kato Y, Kitagawa Y, Kodama R, Mima K, Shiraga H, Suzuki K, Yamakawa K, Zhang T, Sakawa Y, Shoji T, Nishida Y, Yugami N, Downer M, Tajima T. Observation of ultrahigh gradient electron acceleration by a self-modulated intense short laser pulse. PHYSICAL REVIEW LETTERS 1995; 74:4428-4431. [PMID: 10058504 DOI: 10.1103/physrevlett.74.4428] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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3863
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Yamada H, Komiyama A, Suzuki K. Schwann cell responses to forskolin and cyclic AMP analogues: comparative study of mouse and rat Schwann cells. Brain Res 1995; 681:97-104. [PMID: 7552298 DOI: 10.1016/0006-8993(95)00293-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Forskolin and cAMP analogues (8-bromo cAMP and dibutyryl cAMP) induced proliferation or surface galC expression, depending on the concentrations, in rat and mouse Schwann cells in vitro. However, rat Schwann cells required much higher concentrations of these agents than mouse Schwann cells in both proliferation and surface galC expression. The concentrations needed for cellular proliferation were 0.5 microM forskolin or 10 microM cAMP analogues in mice and 2.5 microM forskolin or 50 microM cAMP analogues in rats. Surface galC was expressed in mouse Schwann cells at concentrations of 10 microM forskolin or 100 microM cAMP analogues, while in rat Schwann cells, 50 microM forskolin or 500 microM cAMP analogues was needed for expression of surface galC. Rat Schwann cells transformed from an elongated spindle shape to flattened cells by the addition of these agents. However, mouse Schwann cells remained spindle shaped and their processes were apparently elongated at concentrations of more than 1.0 microM forskolin or 100 microM cAMP analogues. These results may reflect the differences in the cellular metabolism between mouse and rat cells. Moreover, the elongation of mouse Schwann cell processes appeared to be associated with surface galC expression, suggesting that elongation may be an initial signal for differentiation in mouse Schwann cells.
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3864
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Usuki F, Ishiura S, Sasagawa N, Sorimachi H, Suzuki K, Shimizu T, Terao T. Up-regulation of dystrophin mRNA by exposure to dibutyryl cAMP in the C2C12 muscle cell line. Biochem Biophys Res Commun 1995; 210:654-9. [PMID: 7763238 DOI: 10.1006/bbrc.1995.1710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The effect of dibutyryl cAMP on dystrophin mRNA expression was investigated in C2C12 myogenic cells by a semi-quantitative RT-PCR method. The dystrophin mRNA level was enhanced by the addition of low concentrations of dibutyryl cAMP for 16h in the growth medium. The relative amounts of dystrophin/G3PDH mRNA at 10(-4) M dibutyryl cAMP were about 2.6-fold higher compared to control. We examined MLC1a mRNA expression in order to know whether the induction of dystrophin mRNA is due to the facilitation of myogenic differentiation by dibutyryl cAMP. MLC1a mRNA expression at 10(-4) M dibutyryl cAMP was similar to that of control. Thus we conclude that the dibutyryl cAMP enhancement of dystrophin mRNA expression is not due to a secondary event involving the formation of differentiated myotubes. The induction of CREB mRNA by dibutyryl cAMP suggests that the up-regulation of dystrophin mRNA expression might occur via transcriptional activation.
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3865
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Kanemitsu Y, Suzuki K, Kyushin S, Matsumoto H. Visible photoluminescence from silicon-backbone polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:13103-13110. [PMID: 9978108 DOI: 10.1103/physrevb.51.13103] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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3866
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Suzuki K, Nishihata J, Arai Y, Honma N, Yamamoto K, Irimura T, Toyoshima S. Molecular cloning of a novel actin-binding protein, p57, with a WD repeat and a leucine zipper motif. FEBS Lett 1995; 364:283-8. [PMID: 7758584 DOI: 10.1016/0014-5793(95)00393-n] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A 57 kDa protein (p57) was obtained during the study on phosphatidylinositol-specific phospholipase C. Its cDNA was isolated from calf spleen and human leukemia cell line HL60 libraries and cloned. In the primary structures of p57, they have two unique amino acid sequence motifs, a WD repeat and a leucine zipper motif. Furthermore, p57 shared sequence similarity (40%) with coronin, an actin-binding protein responsible for chemotaxis, cell motility, and cytokinesis of Dictyostelium discoideum, which has only the WD repeat. p57 also showed an actin-binding activity and was mainly expressed in immune tissues. From these results, we conclude that p57 is a coronin-like novel actin-binding protein in mammalian cells but may also have a different function from coronin.
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3867
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Suzuki K, Yamaguchi T, Oshizawa T, Yamamoto Y, Nishimaki-Mogami T, Hayakawa T, Takahashi A. Okadaic acid induces both augmentation and inhibition of opsonized zymosan-stimulated superoxide production by differentiated HL-60 cells. Possible involvement of dephosphorylation of a cytosolic 21K protein in respiratory burst. BIOCHIMICA ET BIOPHYSICA ACTA 1995; 1266:261-7. [PMID: 7766712 DOI: 10.1016/0167-4889(95)00029-r] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We found that okadaic acid (OA), a potent tumor promoter and a phosphatase inhibitor, has a unique opposing effect on opsonized zymosan (Op.-zym.)-elicited O2.- production by differentiated HL-60 cells in a narrow range of concentrations but does not induce any O2.- production by itself. Okadaic acid magnified the O2.- production 2.5-fold at 1.0 microM, while it inhibited it at 2.0 microM or higher concentrations. This effect of OA did not correspond to the changes in the expression of surface receptors (CD11b/CD18, CR3) for Op.-zym., because they were weakly down-regulated by OA at any concentration. Two-dimensional gel electrophoresis revealed that in the absence of OA, Op.-zym. induced rapid dephosphorylation of a cytosolic 21K protein with a very slight increase in phosphorylation of membranous p47phox, which is one of the cytosolic factors required for respiratory burst. In the presence of a stimulatory concentration (1.0 microM) of OA, the Op.-zym.-caused dephosphorylation of the 21K protein was still observed and the phosphorylation of p47phox was enhanced. In the presence of an inhibitory concentration (2.0 or 5.0 microM) of OA, the Op.-zym.-induced dephosphorylation of the 21K protein was strongly inhibited while p47phox was heavily phosphorylated. Acid hydrolysis of the 21K phosphoprotein yielded only phosphoserine as a phosphoamino acid. Furthermore, at least part of the 21K protein seemed to be associated with p67phox and p47phox, because it was co-immunoprecipitated with those cytosolic factors. These results suggest that a cytosolic 21K protein plays an important role in respiratory burst through dephosphorylation by a phosphoserine phosphatase, and that the dephosphorylated 21K protein may work synergistically with the phosphorylated p47phox on the pathway for activation of the respiratory burst oxidase.
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3868
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Kinouchi T, Sorimachi H, Maruyama K, Mizuno K, Ohno S, Ishiura S, Suzuki K. Conventional protein kinase C (PKC)-alpha and novel PKC epsilon, but not -delta, increase the secretion of an N-terminal fragment of Alzheimer's disease amyloid precursor protein from PKC cDNA transfected 3Y1 fibroblasts. FEBS Lett 1995; 364:203-6. [PMID: 7750571 DOI: 10.1016/0014-5793(95)00392-m] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A large soluble N-terminal fragment of Alzheimer's disease amyloid precursor protein (secreted form of APP: APPs) is produced by constitutive processing in the middle of the amyloid beta-protein portion of APP. Recent studies indicate that the activation of endogenous protein kinase C (PKC) with phorbol ester raises the rate of secretion of APPs. We constructed rat fibroblast 3Y1 cells that stably overexpress PKC isoenzymes alpha, delta, or epsilon, and analyzed the amount of APPs released from these PKC transfectants. The levels of APPs released from 3Y1 cells overexpressing PKC alpha and -epsilon were higher than those from PKC delta-transfected and control cells expressing vector only. These results suggest that specific isoforms of PKC regulate the secretion of APPs through a signaling pathway.
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3869
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Fujii J, Suzuki K, Taniguchi N. [Physiological significance of superoxide dismutase isozymes]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 1995; 53:1227-1231. [PMID: 7602783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Superoxide dismutases (SODs) scavenge superoxide anion and participate in an essential role as a defense system against oxidative stress in body. Cu,Zn-SOD is localized at cytoplasm. A defect in the Cu,Zn-SOD gene has been demonstrated in some cases of familial amyotrophic lateral sclerosis. Trisomy of chromosome 21 in Down's syndrome increases the level of this isozyme and causes the disease. Inactivation of Cu,Zn-SOD by glycation under hyperglycemic conditions may also be a critical factor for diabetic complication. The expression of the second isozyme, Mn-SOD localized at mitochondrial matrix, is regulated in a complex manner by many stimulants such as interleukin-1, -6, tumor necrosis factor, lipopolysaccharide, and tumor promoters phorbol ester (TPA) and okadaic acid. This isozyme seems to work as a defense mechanism against damage during inflammatory responses. The third isozyme, extracellular SOD, is highly glycosylated and has affinity for heparin sulfate. This may participate in scavenging superoxide in plasma and, therefore, missense mutation in heparin binding domain increases the serum level of this isozyme, although the physiological role is not clearly understood yet.
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3870
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Watanabe M, Ozaki T, Hirata Y, Yoshikuni Y, Kimura K, Suzuki K, Sato S. [The effect of lactitol (NS-4) on the concentrations of ammonia and amino acids in blood and cerebrospinal fluid in Eck fistula (portacaval-shunted) dogs]. Nihon Yakurigaku Zasshi 1995; 105:389-402. [PMID: 7628787 DOI: 10.1254/fpj.105.389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Lactitol and lactulose were compared in their effect on the concentrations of ammonia and amino acids in blood and cerebrospinal fluid (CSF) in Eck fistula dogs. Drugs were administered intragastrically for four weeks from three weeks after the portacaval-shunt operation. The concentration of ammonia in the blood and CSF had increased three- to five-fold three weeks after the operation and increased gradually thereafter. Eck fistula dogs showed a characteristic profile of plasma amino acids, with increased concentrations of tryptophan (Trp) and aromatic amino acids (AAA) and reduced concentrations of branched-chain amino acids. The profile of CSF amino acids revealed substantial increases in the concentrations of AAA as well as glutamine (Gln), Trp and glutamic acid. Lactitol at doses of 1 and 3 g/kg/day significantly decreased the ammonia concentration in both the blood and CSF after administration for two and four weeks. Lactitol at a dose of 3 g/kg/day significantly decreased the concentration of Trp in the plasma and the concentrations of valine, leucine, AAA and Gln in CSF. Lactulose showed effects similar to those of lactitol. These findings suggest that lactitol may be a promising agent for the clinical treatment of hyperammonemia and hepatic encephalopathy, since it decreased the concentration of ammonia in the blood and CSF and the elevated concentrations of AAA in CSF associated with the development of hepatic encephalopathy.
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3871
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Hoshi S, Orikasa S, Suzuki K, Saitoh T, Takahashi T, Yoshikawa K, Kuwahara M, Nose M. High-energy underwater shock wave treatment for internal iliac muscle metastasis of prostatic cancer: a first clinical trial. Jpn J Cancer Res 1995; 86:424-8. [PMID: 7790315 PMCID: PMC5920856 DOI: 10.1111/j.1349-7006.1995.tb03074.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The first clinical trial of high-energy shock wave (SW) combined with chemotherapy to treat metastasis of prostate cancer in the internal iliac muscle was conducted. The patient, a 57-year-old man, diagnosed as having mucin-producing, poorly differentiated adenocarcinoma of the prostate invading the bladder wall, had been treated by total cystoprostatectomy. Five months later, metastatic tumors were found in the left axillar subcutaneous tissue and the right internal iliac muscles. For the axillar metastasis we performed radiation and left subclavicular arterial infusion of cisplatin 70 mg, THP-adriamycin (THP) 50 mg and methotrexate 50 mg. For the right internal muscular metastasis, 10,000 to 20,000 shots of SW and simultaneous intravenous injection of carboplatin 100 mg and THP 10 mg were carried out. Neither of the tumors decreased in size, but on magnetic resonance images, the SW-treated tumor exhibited a central low-intensity area. The SW-treated tumor was resected and central necrosis and a collection of mucin in the central area were observed. Hormone-resistant prostate cancer is well-known to be a multidrug-resistant tumor. It is noteworthy that SW and chemotherapy induced necrosis in such a refractory cancer without any significant side effects.
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3872
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Suzuki K, Kisaki N, Takahashi T. [Ureteritis cystica--report of a case diagnosed by biopsy under ureteroscopy]. HINYOKIKA KIYO. ACTA UROLOGICA JAPONICA 1995; 41:379-81. [PMID: 7598039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A 62-year-old male with left ureteritis cystica was reported. Extracorporeal shock wave lithotripsy (ESWL) was performed for his left renal stone 14 and 17 months earlier. However, small fragments remained in the lower calyx and pyuria, microhematuria and bacteriuria continued. Drip infusion pyelography (DIP) showed a small filling defect of the left dilated ureter. Retrograde pyelography revealed multiple, small filling defects of the left middle through the lower ureter. Multiple small submucosal cysts were observed mostly in the pelvic ureter by ureteroscopic examination. Ureteroscopic cold punch biopsy proved ureteritis cystica. The ureteral dilatation improved and filling defects disappeared after the treatment with antibiotics.
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3873
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Hemmi A, Komiyama A, Ohno S, Fujii Y, Kawaoi A, Katoh R, Suzuki K. Different organization of intermediate filaments in columnar cells of rat large intestinal mucosa as revealed by confocal laser scanning microscopy and quick-freezing and deep-etching method. Virchows Arch 1995; 426:401-10. [PMID: 7599793 DOI: 10.1007/bf00191350] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The relationship between cell differentiation and ultrastructural changes of intermediate filaments (IF) was studied in columnar cells of large intestinal mucosa of rats by confocal laser scanning microscopy and quick-freezing and deep-etching method. A feature of the IF in immature columnar cells was minibundle formation with prominent branching, which organized the meshwork structures. The minibundles, which appeared to be formed by the attachment of two or more IF in side-to-side fashion, were loosely distributed throughout the cytoplasm. In contrast, in mature columnar cells, the IF were densely distributed under the terminal web in the cytoplasm and beneath the upper part of the lateral membrane regions, whereas the other areas of the cytoplasm contained only a small number of IF. Minibundle formation was not observed, and the branching was rarely identified. The changes in the distribution and density of IF, which are expressed in specific areas of mature columnar cells, apparently represent a characteristic of intracellular differentiation. It is suggested that the dissociation of minibundled IF, which was often observed in the immature columnar cells, is an important step in the acquisition of functional polarity in cells of this type.
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Suzuki K, Shinshi H. Transient Activation and Tyrosine Phosphorylation of a Protein Kinase in Tobacco Cells Treated with a Fungal Elicitor. THE PLANT CELL 1995; 7:639-647. [PMID: 12242379 PMCID: PMC160810 DOI: 10.1105/tpc.7.5.639] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Suspension-cultured tobacco cells respond to fungal elicitor by activating the transcription of so-called defense genes. This response has been shown to be blocked by staurosporine, an inhibitor of protein kinases, and by Gd3+, which blocks Ca2+ channels. We report here that treating tobacco cells with the elicitor triggers the rapid and transient activation of a 47-kD protein kinase that phosphorylates serine and/or threonine residues of the myelin basic protein (MBP). Staurosporine and Gd3+ inhibited the elicitor-induced activation of the 47-kD MBP kinase, and staurosporine inhibited the activity of the MBP kinase itself. In the presence of either cycloheximide or calyculin A, the elicitor induced sustained activation of the MBP kinase. Immunoblot and immunoprecipitation analysis using a phosphotyrosine-specific antibody showed that tyrosine phosphorylation of the 47-kD MBP kinase was induced in tobacco cells that had been treated with the elicitor. The results suggest that the 47-kD MBP kinase is a component of the pathway for transduction of the elicitor signal in tobacco cells and that the activity of the MBP kinase is regulated by the post-translational phosphorylation of tyrosine residues.
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Uwatoko S, Mannik M, Oppliger IR, Okawa-Takatsuji M, Aotsuka S, Yokohari R, Seki G, Taniguchi S, Suzuki K, Kurokawa K. C1q-binding immunoglobulin G in MRL/l mice consists of immune complexes containing antibodies to DNA. CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY 1995; 75:140-6. [PMID: 7704971 DOI: 10.1006/clin.1995.1063] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Previous studies have shown that the majority of C1q-binding IgG in patients with systemic lupus erythematosus (SLE) is composed of autoantibodies to the collagen-like region of C1q. Mice of the MRL/l strain are considered as a murine model of human SLE and possess autoantibodies to nuclear antigens as well as IgM and IgG rheumatoid factors (RF). This study was undertaken to characterize the C1q-binding IgG in MRL/l mice. In contrast to human SLE, C1q-binding IgG in MRL/l mice showed immunochemical characteristics of immune complexes rather than those of autoantibodies to C1q. Namely, C1q-binding IgG in MRL/l mice was large-sized upon HPLC gel filtration and abolished by digestion with pepsin or by high salt concentration, and bound to the globular region of C1q. The C1q-binding activity in MRL/l mice was absorbed by double-stranded DNA- or single-stranded DNA-cellulose. The medium-sized immune complexes containing RF have been well documented in MRL/l mice. In this study, however, mouse IgG-Sepharose failed to absorb fully C1q-binding IgG. We conclude that the majority of C1q-binding IgG in MRL/l mice consists of large-sized immune complexes containing antibodies to DNA.
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