951
|
Nakagawa T, Minami M, Katsumata S, Ienaga Y, Satoh M. Suppression of naloxone-precipitated withdrawal jumps in morphine-dependent mice by stimulation of prostaglandin EP3 receptor. Br J Pharmacol 1995; 116:2661-6. [PMID: 8590986 PMCID: PMC1909143 DOI: 10.1111/j.1476-5381.1995.tb17223.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
1. We have shown that intracisternal (i.c.) administration of interleukin-1 beta (IL-1 beta) attenuates naloxone-precipitated withdrawal jumps in morphine-dependent mice, and the effect was partly mediated by the corticotropin-releasing factor. To elucidate further other possible mechanisms involved in the inhibitory effect of IL-1 beta on morphine withdrawal jumping behaviour, in this study, we examined the involvement of the prostaglandin-synthesis pathway, because prostaglandins have been shown to mediate the several central effects of IL-1. Furthermore, we examined the effects of subtype-selective prostaglandin receptor agonists on morphine withdrawal jumping behaviour. 2. Mice were rendered morphine-dependent by subcutaneous implantation of a pellet containing 11.5 +/- 0.3 mg morphine hydrochloride for 48 h. Morphine withdrawal syndromes were precipitated by intraperitoneal (i.p.) injection of naloxone (10 mg kg-1). The degree of physical dependence on morphine was estimated by counting the number of jumps, one of the typical withdrawal signs in mice, for 40 min. 3. The inhibitory effect of IL-1 beta (1 ng/mouse) administered intracisternally 30 min before naloxone (10 mg kg-1, i.p.) was significantly blocked by pretreatment with sodium salicylate (a cyclo-oxygenase inhibitor, 10 ng or 30 ng/mouse) administered intracisternally 15 min before IL-1 beta, while i.c. administration of sodium salicylate alone (3 ng, 10 ng or 30 ng/mouse) followed by i.c. administration of vehicle instead of IL-1 beta did not significantly change the number of jumps precipitated by naloxone. 4. Intracisternal administration of M&B28,767 (an EP3-receptor agonist, 1 fg-30 ng/mouse) and sulprostone (an EP1/EP3-receptor agonist, 10 fg-100 ng/mouse) 30 min before naloxone (10 mg kg,-1 i.p.) attenuated withdrawal jumps with a U-shaped dose-response, reaching a peak at 10 pg/mouse and 100 pg/mouse, respectively. On the other hand, i.c. administration of iloprost (an EP1/IP-receptor agonist, 10 fg-100 ng/mouse), butaprost (an EP2-receptor agonist, 10 fg-100 ng/mouse) or prostaglandin F2 alpha (a FP-receptor agonist, 10 fg-100 ng/mouse) 30 min before naloxone (10 mg kg-1, i.p.) did not significantly change the number of jumps precipitated by naloxone. 5. These results indicate that the prostaglandin-synthesis pathway is, at least in part, involved in the inhibitory effect of IL-1 beta on naloxone-precipitated withdrawal jumps in morphine-dependent mice, and that the prostaglandin synthesized in the brain suppresses the morphine withdrawal jumping behaviour via the EP3-receptor, but not via the EP1-, EP2-, IP- or FP-receptor.
Collapse
|
952
|
Hisashi K, Nakagawa T, Yasuda T, Kimitsuki T, Komune S, Komiyama S. Voltage-dependent Ca2+ channels in the spiral ganglion cells of guinea pig cochlea. Hear Res 1995; 91:196-201. [PMID: 8647721 DOI: 10.1016/0378-5955(95)00191-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Voltage-dependent Ca2+ channels in spiral ganglion cells (SGCs) isolated from guinea pig cochlea were investigated using the patch-clamp technique in a whole-cell recording mode. The voltage-dependent Na+ and K+ currents were blocked by adding tetrodotoxin, 4-aminopyridine, and tetraethylammonium to the external solution and by using choline or Cs+ in the external and internal solutions instead of Na+ or K+, respectively. The depolarizing voltage steps evoked inward currents with slow current decay. The maximum amplitude of the inward current increased in a hyperbolic manner with increasing extracellular Ca2+ concentration, indicating that the inward current was a voltage-dependent Ca2+ current (ICa). In 5 mM Ca2+ external solution, the ICa activated from a membrane potential around -60 mV and reached full activation at about -10 mV. The ICa inactivated from about -60 mV and became fully inactivated at about O mV, consistent with the high-voltage-activated Ca2+ channel subtype. Ionic selectivities for Ca2+ channels in SGCs were as follows: Ca2+ > Ba2+ > Sr2+. Effects of both inorganic and organic Ca2+ antagonists also were examined. The inhibitory strength was as follows: La3+ > Cd2+ > Ni2+ > or = Co2+ for inorganic Ca2+ antagonists, and flunarizine > nicardipine > methoxyverapamil > diltiazem for organic ones.
Collapse
|
953
|
Kabuto M, Kubota T, Kobayashi H, Nakagawa T, Kitai R, Kodera T. Detection of mammosomatotroph cells and identification of the coexistence of growth hormone and prolactin within the same secretory granules in these cells using confocal laser scanning microscopy. Histochem Cell Biol 1995; 104:363-7. [PMID: 8574886 DOI: 10.1007/bf01458130] [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: 01/31/2023]
Abstract
This study was designed to examine whether mammosomatotroph cells (MS cells) can be easily detected using confocal laser scanning microscopy (CLSM) and whether the coexistence of growth hormone (GH) and prolactin (PRL) within the same secretory granule can be identified in the MS cell using CLSM. Conventional epoxy resin-embedded tissues of mixed GH- and PRL-secreting human pituitary adenomas were used for this double-labelling immunofluorescent study by CLSM. A semithin section of the tissue after plastic removal and bleaching was immunohistochemically double-stained with primary antibodies against GH and PRL, followed by secondary antibodies conjugated with Rhodamine (GH) and FITC (PRL). MS cells simultaneously showing fluorescence of both Rhodamine and FITC were easily detected by CLSM at lower magnification. At higher magnification, the coexistence of Rhodamine and FITC on the same secretory granule was identified by using a superimposed display. This finding was confirmed by immunoelectron microscopy. The CLSM technique may be useful for the study of MS cells.
Collapse
|
954
|
Nakagawa T, Nakagawa S, Ishihara K, Yamada S, Machida Y, Okuda K. Reactive antibodies in sera from pubertal and adult gingivitis patients against various Porphyromonas gingivalis antigens. J Periodontal Res 1995; 30:396-403. [PMID: 8544103 DOI: 10.1111/j.1600-0765.1995.tb01293.x] [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: 01/31/2023]
Abstract
This study was undertaken to determine the immunodominant antigens from Porphyromonas gingivalis which reacted with sera from patients of pubertal and adult gingivitis. The patients with cultivable P. gingivalis and the patients without cultivable P. gingivalis were compared by immunoblots. Fifty subjects participated in this study: 20 with gingivitis, 20 periodontally healthy, and 10 with adult periodontitis. The groups with gingivitis and healthy periodontium each contained 10 pubescent subjects and 10 adult subjects. P. gingivalis was isolated from 9 of 20 patients with gingivitis and from all of 10 with periodontitis by culture study. Approximate molecular weight 43 KDa fimbriae antigen, 57, 53, 46, 28 KDa antigens from outer membrane, and 57, 44, 40, 18.5 KDa antigens from sonicated extracts of P. gingivalis reacted significantly more frequently with sera from the P. gingivalis culture-positive gingivitis patients than with sera from the culture-negative patients by Fisher's exact test. A molecular weight 75, 31 KDa antigen from outer membrane and a 46 KDa antigen from sonicated extract were immunodominant in sera from adult patients with periodontitis. These findings indicate that the specific antigens which reacted with sera from P. gingivalis culture-positive patients are markers of infection with P. gingivalis. Additionally, reactivity to antigens were slightly different between sera from patients with gingivitis and those from patients with periodontitis.
Collapse
|
955
|
Oguri-Hyakumachi N, Takahashi S, Nakagawa T, Kikuchi K. Selective depletion of cyclin-dependent kinases is associated with Fas-mediated apoptosis in human leukemia T-cell lines. INTERNATIONAL JOURNAL OF IMMUNOPHARMACOLOGY 1995; 17:913-21. [PMID: 8788121 DOI: 10.1016/0192-0561(95)00082-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The Fas/Apo-1 molecule is a member of tumor necrosis factor/nerve growth factor (TNF/NGF) receptor family and is able to induce apoptosis in various type of malignant cells, including most of the human leukemia T-cells. We previously demonstrated that the Fas-resistant variants may exist in highly Fas-sensitive human leukemia T-cell lines. The surface expression of Fas antigen was unchanged in the variant cells, suggesting the requirement of the cytoplasmic mechanism to exert apoptosis. In the present study, we examined the changes in cytoplasmic proteins of the Fas-sensitive and Fas-resistant cells after stimulation with anti-Fas antibody, 2D1. In Western blotting analysis, we found that the stimulation of Fas-sensitive cells with 2D1, but not resistant variants, induced a repression of cyclin-dependent kinases (cdks), p34cdc2 and p33cdk2, along with apoptosis. There was no alteration in the expression of bcl-2, HSP70, HSP90, and cyclin proteins examined. This observation seemed specific to Fas-mediated apoptosis, because calcium ionophore A23187 or sodium azide failed to repress the expression of cdks. These results indicate that the specific depletion of cdks, most likely due to proteolysis, may play a role in Fas-mediated apoptosis.
Collapse
|
956
|
Ito K, Sugihara H, Terada K, Matsumoto K, Taniguchi Y, Ohtsuki K, Miyazaki H, Nakagawa T, Azuma A, Maeda T. [Assessment of myocardial fatty acid metabolism in patients with vasospastic angina using 123I-BMIPP myocardial SPECT]. KAKU IGAKU. THE JAPANESE JOURNAL OF NUCLEAR MEDICINE 1995; 32:1099-106. [PMID: 8523832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Myocardial perfusion and fatty acid metabolism may be unpaired in the patients of vasospastic angina (VSA), because abnormal regional wall motion of left ventricle has been shown in some cases of VSA without apparent history of myocardial infarction. To study the clinical utility of 123I-BMIPP scintigraphy in diagnosis of myocardial ischemia in VSA, both 123I-BMIPP (rest) and 201T1 (exercise) SPECT were performed in the 20 patients of VSA diagnosed by coronary angiography. Defect scores were calculated visually from the 17 segments of myocardial images and were compared with patient's anginal history, period from last attack, numbers of attack, left ventricular (LV) ejection fraction and severity of regional LV wall motion abnormality. 123I-BMIPP SPECT images showed decreased tracer uptake in 14 cases of 20 (70%) VSA patients. Exercise 201T1 SPECT images showed decreased tracer uptake in 3 cases of 20 (15%) of patients. Severity of regional LV wall motion abnormality was correlated with defect score of BMIPP. Though total defect score of BMIPP did not correlate with patient's anginal history, number of symptoms and LV ejection fraction, correlated inversely with period from last attack. It was suggested that 123I-BMIPP myocardial SPECT images in VSA patients showed "memories" of myocardial ischemic damages induced by vasospasm. In summary, 123I-BMIPP myocardial SPECT images could be a useful test for diagnosis and evaluation of VSA.
Collapse
|
957
|
Nozaki S, Kashiwagi H, Yamashita S, Nakagawa T, Kostner B, Tomiyama Y, Nakata A, Ishigami M, Miyagawa J, Kameda-Takemura K. Reduced uptake of oxidized low density lipoproteins in monocyte-derived macrophages from CD36-deficient subjects. J Clin Invest 1995; 96:1859-65. [PMID: 7560077 PMCID: PMC185822 DOI: 10.1172/jci118231] [Citation(s) in RCA: 266] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
To clarify the physiological roles of CD36 as an oxidized low density lipoprotein (OxLDL) receptor, we analyzed the monocyte-derived macrophages from normal and two CD36-deficient subjects, since we identified the molecular abnormalities (Kashiwagi, H., Y. Tomiyama, Y. Kosugi, M. Shiraga, R. H. Lipsky, Y. Kanayama, Y. Kurata, and Y. Matsuzawa 1994. Blood. 83:3545-3552; and Kashiwagi, H., Y. Tomiyama, S. Honda, S. Kosugi, M. Shiraga, N. Nagao, S. Sekiguchi, Y. Kanayama, Y. Kurata, and Y. Matsuzawa. 1995. J. Clin. Invest. 95:1040-1046). Scatchard analysis of 125I-OxLDL binding showed a linear plot and the maximum binding was lower by approximately 40% in the macrophages from subjects with CD36 deficiency than those from normal controls. Competition studies showed that the uptake of 125I-OxLDL was suppressed by OKM5, an antibody against CD36, by 53% in normal control macrophages, but not in the CD36-deficient macrophages. After incubation with OxLDL for 24 h, cholesteryl ester mass accumulation was reduced by approximately 40% in the macrophages from CD36-deficient subjects than those from normal controls. These results suggest that CD36 is one of the physiological receptors for OxLDL. Since specific binding of OxLDL was only reduced by approximately 40% in spite of the complete deficiency of CD36, several other receptors also may have some role in OxLDL uptake. Further studies will be needed to assess the quantitative role of CD36 in foam cell formation in vivo.
Collapse
|
958
|
Kabuto M, Kubota T, Kobayashi H, Nakagawa T, Kitai R, Uno H, Kodera T. [Antitumor effect of MX2, a new morpholino anthracycline against C6 glioma cells and its combination effect with photodynamic therapy in vitro]. NO TO SHINKEI = BRAIN AND NERVE 1995; 47:969-73. [PMID: 7577142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
MX2, a new lipophilic morpholino anthracycline, has been reported to have superior chemotherapeutic effects to adriamycin against murine and human tumor cells. In this study the chemotherapeutic effect of MX2 against C6 glioma cells was examined as well as the photocytotoxicity of MX2 and the combination effect of MX2 and photodynamic therapy (PDT) in vitro. Colony formation is inhibited even with only 2 hour treatment with MX2 in a dose-dependent manner. In this colony forming efficiency assay the drug concentration required for 50% inhibition of colony formation for C6 glioma cells was 24.0 +/- 4.5 ng/ml. Mild photocytotoxicity of MX2 against C6 glioma cells was observed at a high concentration (100 ng/ml) of MX2 following exposure to white light but not red light. In combination, MX2 and the photosensitizer haematoporphyrin derivative (HpD) exhibited an additive cytotoxic effect against C6 glioma cells when the cells were treated with MX2 either immediately after red light illumination following incubation with HpD or at an interval of 24 hours before incubation with HpD. We conclude that MX2 may be clinically useful against malignant glioma alone, and in combination with other therapies such as PDT.
Collapse
|
959
|
Nakagawa T, Kubota T, Kabuto M, Sato K, Arai Y, Kodera T. Production of tissue inhibitor of metalloproteinases-1 (TIMP-1) by human astrocytic tumors. Neurol Med Chir (Tokyo) 1995; 35:728-31. [PMID: 8532127 DOI: 10.2176/nmc.35.728] [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: 01/31/2023] Open
Abstract
Production of tissue inhibitor of metalloproteinases-1 (TIMP-1), a specific inhibitor of matrix metalloproteinases, was investigated in human astrocytic tumors (n = 15) and normal brain tissues (n = 3). Enzyme immunoassay indicated that TIMP-1 levels in the culture media of tumor explants were significantly higher in glioblastomas as compared with anaplastic astrocytomas, astrocytomas, and normal brain tissues. Immunohistochemistry using a monoclonal antibody against TIMP-1 demonstrated that TIMP-1 was detectable mainly in tumor cells, especially in glioblastoma. These results suggest that increased expression of TIMP-1 is associated with the malignant progression of astrocytic tumors.
Collapse
|
960
|
Hirakata K, Nakata H, Nakagawa T. CT of pulmonary metastases with pathological correlation. Semin Ultrasound CT MR 1995; 16:379-94. [PMID: 8527171 DOI: 10.1016/0887-2171(95)90027-6] [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: 01/31/2023]
Abstract
CT, including high-resolution CT, has become an essential means of imaging to evaluate pulmonary metastases. The underlying pathological processes of pulmonary metastases can be observed well on CT images, but they are not always specific. Several important CT features correlate with histopathological findings: (1) margin of nodule; (2) hemorrhage accompanying a metastatic nodule; (3) calcification; (4) cavitation; (5) sterilized metastasis; (6) small metastatic nodules in the lobules; (7) lymphangitic carcinomatosis; (8) tumor emboli; and (9) pleural metastases. For reasonable use of CT in pulmonary metastases, these various CT manifestations and their limitations must be understood.
Collapse
|
961
|
Ochiai N, Nagano A, Yamamoto S, Nakagawa T, Shibata K. Tenodesis of extensor digitorum in treatment of brachial plexus injuries involving C5, 6, 7 and 8 nerve roots. JOURNAL OF HAND SURGERY (EDINBURGH, SCOTLAND) 1995; 20:671-4. [PMID: 8543877 DOI: 10.1016/s0266-7681(05)80132-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Restoration of motor function in the hand is difficult in brachial plexus injuries in which the C5, 6, 7 and 8 roots are involved, because there are insufficient motors available for transfer to restore the extensors of the fingers and wrist. We have used extensor digitorum tenodesis in 11 cases and found it effective and simple.
Collapse
|
962
|
Ohara T, Shibukawa A, Nakagawa T. Capillary electrophoresis/frontal analysis for microanalysis of enantioselective protein binding of a basic drug. Anal Chem 1995; 67:3520-5. [PMID: 8686900 DOI: 10.1021/ac00115a022] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A new HPCE method was developed for the enantioselective determination of the unbound concentration of a basic drug under plasma protein binding equilibrium. The racemic basic drug verapamil (VER) and human serum albumin mixed solution was used as a model sample solution. The sample solution was introduced into a fused-silica capillary hydrodynamically or electrokinetically. During the electrophoresis following hydrodynamic injection, the unbound drug zone migrated apart from the sample zone and was separated into two zonal peaks with a plateau due to enantiomers by a chiral selector (trimethyl-beta-cyclodextrin) dissolved in the acidic running buffer solution (pH 2.5). By the electrokinetic introduction of the same sample solution from the anodic end, only the unbound drug entered the capillary and was separated into the enantiomers, which also gave the zonal peaks with plateau. The unbound concentration of each enantiomer was determined from the plateau peak height. The results obtained by the different methods for sample introduction agreed well with those determined by conventional ultrafiltration-chiral HPLC, which was employed as a reference method. The unbound concentration of (S)-VER was 1.7 times higher than that of the antipode. The sample size used in the present method was approximately 200 nL, which is about one-thousandth of that in the reference method. The electrokinetic introduction gave a better peak shape than the hydrodynamic introduction.
Collapse
|
963
|
Kabuto M, Kubota T, Kobayashi H, Nakagawa T, Kitai R. The antitumor effect of MX2, a new morpholino anthracycline, against malignant glioma cell lines and its subcellular distribution. Neurosurgery 1995; 37:471-6; discussion 476-7. [PMID: 7501112 DOI: 10.1227/00006123-199509000-00015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The chemotherapeutic effect of MX2 (3'-deamino-3'-morpholino-13-deoxo-10-hydroxycarminomycin), a new lipophilic morpholino anthracycline, against rat C6 and human T98G glioma cells, was examined in vitro and in vivo. The subcellular distribution of MX2 was also studied. The drug concentrations of MX2 required for the 50% inhibition of cell growth (IC50) for C6 and T98G cells were 25.5 +/- 1.3 ng/ml and 70.6 +/- 6.8 ng/ml, respectively, which were much lower than the IC50 values for nimustine (ACNU). A C6 subline resistant to ACNU, C6/ACNU, was established by continuous exposure to graded concentrations of ACNU. The IC50 of MX2 for C6/ACNU was 28.3 +/- 2.2 ng/ml, indicating no cross-resistance to MX2. In the rats bearing the intracerebral C6 tumors, the life span was increased by about 40 to 100% after intravenous administration of MX2 at doses ranging from 1 to 3 mg/kg of body weight. Confocal laser scanning microscopy demonstrated visually the good accumulation of MX2 in the implanted intracerebral C6 tumors, as well as its predominant distribution in the cytoplasm over the nucleus in both cell lines in vitro. Ultrastructural studies also demonstrated the cytotoxic effects of MX2 against glioma cells. Our results suggest that MX2 may be a useful chemotherapeutic agent in the treatment of malignant gliomas and that confocal laser scanning microscopy is useful for the study of the cellular pharmacokinetics of anthracycline derivatives, such as MX2.
Collapse
|
964
|
Nakagawa T, Kubota T, Kabuto M, Kodera T. Captopril inhibits glioma cell invasion in vitro: involvement of matrix metalloproteinases. Anticancer Res 1995; 15:1985-9. [PMID: 8572589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We investigated the effects of captopril on the activity of matrix metalloproteinases (MMPs) secreted by T98G glioma cells and their invasiveness in vitro. On gelatin zymography, captopril inhibited gelatinolytic activities in the culture media of T98G cells. This inhibitory effect was reversed by the presence of excess zinc. In an in vitro invasion assay, invasion into the reconstituted basement membrane (Matrigel) by T98G glioma cells was inhibited by captopril in a dose-dependent manner. This inhibitory effect was also reversed by the addition of zinc to the culture media. However, at the effective concentration of captopril for the prevention of tumor cell invasion it did not inhibit the motility, adhesion to Matrigel or proliferation of T98G cells. These findings suggest that captopril inhibits the invasiveness of T98G glioma cells due to its MMP inhibitory activity, chelating zinc ions at the active center of MMPs.
Collapse
|
965
|
Kato M, Masuzawa M, Nakagawa T. [Anti-GOR antibodies]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 1995; 53 Suppl:241-6. [PMID: 7563710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
966
|
Nakajima H, Furutama D, Kimura F, Shinoda K, Nakagawa T, Shimizu A, Ohsawa N. Herpes simplex virus type 2 infections presenting as brainstem encephalitis and recurrent myelitis. Intern Med 1995; 34:839-42. [PMID: 8580553 DOI: 10.2169/internalmedicine.34.839] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
We describe here 3 patients with central nervous system infection caused by herpes simplex virus type 2 (HSV-2); one patient with brainstem encephalitis and two with recurrent transverse thoracic myelitis. All three patients showed increased IgG antibodies to HSV in the cerebrospinal fluid (CSF). HSV-2 DNA was demonstrated in the CSF by polymerase chain reaction (PCR) amplification. Upon treatment with acyclovir, one patient with myelitis partially recovered and the others completely recovered. It is important to recognize the wide spectrum of clinical manifestations of HSV-2 infection in the central nervous system (CNS).
Collapse
|
967
|
Ooishi M, Miyao M, Abe T, Sasagawa T, Motoyama M, Nakagawa T, Okutomi T. [Pharmacokinetics of balofloxacin in the intraocular tissues of pigmented rabbits]. THE JAPANESE JOURNAL OF ANTIBIOTICS 1995; 48:1274-80. [PMID: 7474337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We performed the pharmacokinetics of balofloxacin in plasma and intraocular tissues in pigmented rabbits upon its oral administration. The penetrations of balofloxacin into plasma and aqueous humor of the anterior chamber reached their peaks of 6.46 micrograms/ml and 0.70 microgram/ml, respectively, and the ratio of drug concentration in aqueous humor to that of plasma was 0.12 at 1 hour after an oral administration of 20 mg/kg. Concentrations in plasma and aqueous humor of the anterior chamber reached 0.27 microgram/ml and 0.18 microgram/ml, respectively, at The T 1/2 (alpha) and T 1/2 (beta) of the drug in aqueous humor were longer than those in plasma The T 1/2 (alpha) and T 1/2 (beta) of the drug in aqueous humor were longer than those in plasma at a dose of 20 mg/kg. The concentrations in iris and ciliary body were much higher than in any other intraocular tissue in 24 hours after single administration of 20 mg/kg, and those concentrations remained at high levels for a long time.
Collapse
|
968
|
De Caterina R, Tanaka H, Nakagawa T, Hauptman PJ, Libby P. The direct effect of injectable cyclosporine and its vehicle, cremophor, on endothelial vascular cell adhesion molecule-1 expression. Ricinoleic acid inhibits coronary artery endothelial activation. Transplantation 1995; 60:270-5. [PMID: 7544037 DOI: 10.1097/00007890-199508000-00011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
As in humans, rabbit coronary artery endothelium basally expresses vascular cell adhesion molecule-1 (VCAM-1). Treatment with parenteral cyclosporine (CsA) to prevent graft rejection in rabbits receiving heterotopic heart transplantation reduced VCAM-1 expression in coronary arteries not only in transplanted, but also in native rabbit hearts. To explore the mechanism of this effect, we co-incubated cultured human saphenous vein endothelial cells for 24 hr with CsA or its vehicle (containing polyoxyethylated castor oil, or Cremophor, and ethanol), at concentrations compatible with those achievable in plasma during administration of parenteral preparations of CsA. Cells were then stimulated with TNF alpha or IL-4 to induce VCAM-1 expression, assessed by a cell-surface enzyme immunoassay. Both CsA and vehicle inhibited IL-4-stimulated VCAM-1 expression in a dose-dependent manner (from [OD mU, mean +/- SEM] 230 +/- 5 to 165 +/- 3 for CsA 50 ng/ml, and to 181 +/- 6 for the corresponding vehicle concentration; P < 0.05 for both comparisons). To investigate whether this vehicle effect also occurs in vivo, we treated 9 New Zealand White rabbits with saline (n = 3), CsA (10 mg/kg/day, n = 3), or vehicle at corresponding doses (n = 3) for 6 weeks. Profiles of coronary arteries (> or = 48 for each group) were semiquantitatively scored (0-5) for VCAM-1 in immunostained heart cross-sections. Administration of both CsA and vehicle significantly reduced VCAM-1 expression compared with saline. Two vehicle components, ethanol and ricinoleic acid, were further evaluated directly on endothelial cells in vitro. While ethanol was ineffective, the monounsaturated fatty acid ricinoleic acid inhibited IL-4-stimulated VCAM-1 expression in a dose-dependent manner (IC50 between 10 and 100 microM). Thus, a fatty acid component of CsA vehicle exerts direct endothelial effects, potentially limiting arterial leukocyte recruitment during parenteral CsA treatment. This observation reveals a novel mechanism for CsA as an inhibitor of leukocyte-endothelial interactions, and furnishes a new potential rationale for the therapeutic action of unsaturated fatty acids in graft coronary disease.
Collapse
|
969
|
Nakagawa T, Sukhova GK, Rabkin E, Winters GL, Schoen FJ, Libby P. Acute rejection accelerates graft coronary disease in transplanted rabbit hearts. Circulation 1995; 92:987-93. [PMID: 7641383 DOI: 10.1161/01.cir.92.4.987] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND The relation between episodes of acute rejection and the development of graft coronary arteriosclerosis remains controversial. We examined the hypothesis that acute rejection episodes accelerate graft coronary arteriosclerosis lesion formation in rabbit allografts. METHODS AND RESULTS A control group (n = 5) received cyclosporine 5 mg.kg-1.d-1 for 6 weeks after heterotopic heart transplantation. In a rejection group (n = 5), cyclosporine was omitted for 4 days at 1 and 4 weeks after transplantation. We studied cross sections of grafted hearts at 6 weeks and evaluated myocardial rejection grade, incidence, and severity and cell composition of intimal lesions in multiple coronary artery profiles. Episodic withdrawal of cyclosporine augmented myocardial rejection (International Society for Heart and Lung Transplantation grades 0, 0, 0, 0, and 1A in the control group to grades 1A, 1B, 2, 3A, and 3B in the rejection group). Episodes of acute rejection significantly increased the incidence (7.8 +/- 2.7% to 49.7 +/- 1.9%) and severity (from grade 0.10 +/- 0.04 to 0.79 +/- 0.24) of intimal thickening in graft coronary arteries. Most intimal lesions consisted of smooth muscle cells and contained various degrees of T-lymphocyte infiltration but sparse macrophages. CONCLUSIONS In this experimental model, episodes of acute rejection precipitated by cyclosporine withdrawal accelerated the development of graft vascular lesion formation. Activation of vascular cells and leukocyte recruitment during acute rejection may thus contribute to the pathogenesis of graft arteriosclerosis.
Collapse
|
970
|
Kobayashi S, Tsuchiya K, Nishide M, Nishikiori T, Nakagawa T, Shimada N. Pironetin, a novel plant growth regulator produced by Streptomyces sp. NK10958. III. Biosynthesis. J Antibiot (Tokyo) 1995; 48:893-5. [PMID: 7592038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
971
|
Ueda K, Nakajima H, Nakagawa T, Shimizu A. The association of complement activation at a low temperature with hepatitis C virus infection in comparison with cryoglobulin. Clin Exp Immunol 1995; 101:284-7. [PMID: 7648711 PMCID: PMC1553261 DOI: 10.1111/j.1365-2249.1995.tb08352.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Complement activation at a low temperature in vitro and cryoglobulinaemia are associated with hepatitis C virus (HCV) infection. The frequency of HCV antibody positivity determined in serum specimens that showed the cold-dependent activation of complement was 100%, whereas it was 48% among sera with cryoglobulin. On the other hand, the frequency of cold activation among HCV-infected sera was 41%, and that of cryoglobulin 48%. Cold activation was not found in any HCV- sera studied, whereas cryoglobulin was found at a frequency of 14% in HCV- sera. Cold activation was also absent among hepatitis B virus (HBV) S antigen or antibody-positive sera, except a few that were both HBV+ and HCV+. Rheumatoid factor was also frequently detected in sera with cold activation or cryoglobulin. Cold activation and cryoglobulin may be generated by common mechanisms in which a low avidity, low temperature-preferring antibody may function. In sera with cold activation, fine particles of immune complexes, which do not form precipitates, may activate the complement system. HCV is a unique virus that coexists with antibody in the serum, therefore the avidity of the antibody for the virus antigen may be low, and occasionally react only at a low temperature. This may be why the in vitro phenomenon related to immune complexes occurs specifically in HCV-infected sera.
Collapse
|
972
|
Fukunishi I, Nakagawa T, Nakagawa H, Sone Y, Kaji N, Hosaka T, Rahe RH. Validity and reliability of the Japanese version of the Stress and Coping Inventory. Psychiatry Clin Neurosci 1995; 49:195-9. [PMID: 9179937 DOI: 10.1111/j.1440-1819.1995.tb01884.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We examined the validity and reliability of the Japanese version of the Stress and Coping Inventory (SCI) among 170 Japanese college students and 234 healthy subjects. The validity and reliability of this version of the SCI in the college student group were supported by significant test-retest correlations, relatively high internal consistency coefficients, and adequate correlations with the Coping Inventory for Stressful Situations (CISS). AS for the healthy subject group, the reliability was supported by relatively high internal consistency coefficients, although further analyses, such as test-retest, are required. The Japanese version of the SCI appears to be suitable for use among college students.
Collapse
|
973
|
Nakajima H, Hatamura T, Ikemoto T, Ueda K, Nakagawa T, Shimizu A. [Evaluation of the polymerase chain reaction for diagnosis of tuberculous meningitis]. RINSHO BYORI. THE JAPANESE JOURNAL OF CLINICAL PATHOLOGY 1995; 43:843-6. [PMID: 7474445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Since Shankar et al used polymerase chain reaction (PCR) for detection of Mycobacterium tuberculosis (M. tuberculosis) in cerebrospinal fluid (CSF), there have been numerous reports on PCR assay for diagnosis of tuberculosis meningitis (TBM). The PCR assay have been recognized to be a rapid method for diagnosis of TBM, however there are problems of PCR sensitivity when dealing with CSF samples containing small amount of M. tuberculosis DNA. Comparing direct PCR with nested PCR, we studied on the evaluation of PCR for diagnosis of TBM. In present study the nested PCR were positive in all CSF specimens from 4 patients with TBM, but we could not detect M. tuberculosis DNA by only the direct PCR. Because nested PCR amplification improved the sensitivity and specificity, the nested PCR assay will be necessary for rapid diagnosis of TBM on the clinical laboratory.
Collapse
|
974
|
Kinugasa M, Nishimura R, Koizumi T, Morisue K, Higashida T, Natazuka T, Nakagawa T, Isobe T, Baba S, Hasegawa K. Combination assay of urinary beta-core fragment of human chorionic gonadotropin with serum tumor markers in gynecologic cancers. Jpn J Cancer Res 1995; 86:783-9. [PMID: 7559103 PMCID: PMC5920904 DOI: 10.1111/j.1349-7006.1995.tb02469.x] [Citation(s) in RCA: 11] [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: 01/25/2023] Open
Abstract
Ectopic production of the immunoreactive beta-subunit of human chorionic gonadotropin (IR-hCG beta) by gynecologic malignancies has been well recognized, but IR-hCG beta has not yet been established as a clinically useful tumor marker, except for germ cell tumors. We measured the concentrations of IR-hCG beta-related molecules, intact hCG, free hCG beta, and beta-CF, in the sera and urine of patients with various gynecologic cancers (cervical, endometrial, and ovarian cancers) to assess their clinical usefulness as a tumor marker in comparison with serum tumor markers such as CEA, SCC, CA125, and CA19-9. The highest incidence of IR-hCG beta was obtained in the assay for beta-CF in the urine, with positive rates of 47.7% (94 of 197) for cervical, 37.8% (14 of 37) for endometrial, and 84.4% (38 of 45) for ovarian cancers with a cut-off value of 0.2 ng/mg of creatinine. In cervical cancer, there was no significant correlation between the concentrations of urinary beta-CF and serum SCC, and 57.9% (114 of 197) of the patients were detected by the combination assay of these tumor markers. Serial determination in 22 cervical cancer patients with elevated urinary beta-CF level prior to therapy showed that its level decreased after successful treatment, but 4 of 5 patients with persistent or recurrent disease had elevated levels of urinary beta-CF. All of the ovarian cancer patients examined were detected by the combination assay of urinary beta-CF and serum CA125. The levels of urinary beta-CF showed little correlation with those of the serum tumor markers, indicating the usefulness of the combination assay of urinary beta-CF with serum tumor markers for detecting cervical and ovarian cancers.
Collapse
|
975
|
Nakatani M, Shibukawa A, Nakagawa T. Chemical stability of polyacrylamide-coating on fused silica capillary. Electrophoresis 1995; 16:1451-6. [PMID: 8529613 DOI: 10.1002/elps.11501601240] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The chemical stability of polyacrylamide coatings on a fused silica capillary for capillary electrophoresis was investigated with respect to temperature of capillary and pH as well as salt concentration of running buffer solution by evaluating their effects on electroosmotic mobility. The capillary covalently bonded to linear polyacrylamide through Si-C linkage was stable in buffer solutions of pH 2.3-8.0 at 30 degrees C for 30 days, whereas the capillary bonded through Si-O-Si-C linkage was damaged at pH above 4.6. The electroosmotic mobility observed in both capillaries increased with increasing temperature, though the degree of increase was smaller in the Si-C linked capillary than in the Si-O-Si-C linked capillary. The increase in the buffer concentration resulted in increased electroosmotic mobility in the Si-O-Si-C linked capillary, but no effect was observed for the Si-C linked capillary.
Collapse
|