601
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Ichijima K, Yamabe H, Kobashi Y, Iwata T. Metastasis of cancer to cancer. ACTA PATHOLOGICA JAPONICA 1980; 30:293-300. [PMID: 7386203 DOI: 10.1111/j.1440-1827.1980.tb01323.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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602
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Hokama Y, Kobayashi K, Ishiyama T, Iwata T, Furuya Y, Aoyama D. [Acute symmetric ulcers of the antral portion of the stomach (author's transl)]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1980; 25:49-53. [PMID: 7373911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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603
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Iwata T. [Radiation planning of brain tumor (author's transl)]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1979; 24:1459-63. [PMID: 522276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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604
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Nash L, Iwata T, Fernandes G, Good RA, Incefy GS. Effect of zinc deficiency on autologous rosette-forming cells. Cell Immunol 1979; 48:238-43. [PMID: 509537 DOI: 10.1016/0008-8749(79)90117-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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605
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Fujii Y, Mochizuki Y, Amitani R, Oida K, Iwata T, Matsubara T, Kobashi Y, Ichijima K, Yamabe H, Kurasawa T. [A case of multiple peliotic lesions presenting as pneumothorax (author's transl)]. NIHON KYOBU SHIKKAN GAKKAI ZASSHI 1979; 17:693-7. [PMID: 541918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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606
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Splitter GA, Incefy G, Iwata T, McGuire TC. Evaluation of functional thymic hormones in Arabian horses with severe combined immunodeficiency. Clin Exp Immunol 1979; 38:37-44. [PMID: 230925 PMCID: PMC1537827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Arabian horses with severe combined immunodeficiency disease (SCID) were evaluated for thymic hormone activities using thymic extracts and sera. Extracts prepared from thymus of SCID horses were able to increase the number of spleen cells responding to sheep red blood cells in irradiated, bone marrow-reconstituted mice. In addition, ultrafiltrates prepared from sera of these immunodeficient horses, which contained material with molecular weight of less than 50,000 Daltons could (a) induce a population of human bone marrow precursor cells to differentiate into cells bearing SRBC receptors and form spontaneous E-rosettes, a characteristic of T lymphocytes, and (b) stimulate cyclic adenosine monophosphate (AMP) synthesis in mouse thymocytes. Based on in vivo and in vitro effects, it was concluded that the defect of these Arabian horses with severe combined immunodeficiency disease did not involve a complete thymic hormone inadequacy.
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607
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Shiga H, Ido K, Ohuchi T, Toya S, Shiobara R, Iwata T. [Computed tomography in the diagnosis of cerebellopontine angle tumors: CT, cerebellopontine angle tumor and acoustic neurinoma (author's transl)]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1979; 24:1267-73. [PMID: 316026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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608
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Iwata T, Incefy GS, Tanaka T, Fernandes G, Menendez-Botet CJ, Pih K, Good RA. Circulating thymic hormone levels in zinc deficiency. Cell Immunol 1979; 47:100-5. [PMID: 509529 DOI: 10.1016/0008-8749(79)90318-6] [Citation(s) in RCA: 109] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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609
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Iwata T, Incefy GS, Good RA. Interaction between thymopoietin and facteur thymique serique in the rosette inhibition assay. Biochem Biophys Res Commun 1979; 88:1419-24. [PMID: 475791 DOI: 10.1016/0006-291x(79)91138-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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610
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Nishizawa K, Iwata T, Furuya Y, Maruyama T, Hashizume T. [Determination of gonad, eye and bone marrow doses with EMI-5005 head and whole body scans (author's transl)]. NIHON IGAKU HOSHASEN GAKKAI ZASSHI. NIPPON ACTA RADIOLOGICA 1979; 39:144-51. [PMID: 450650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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611
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Kaiya H, Iwata T, Namba M, Ago Y, Mayahara H, Ogawa K. Ultracytochemical observations of choline acetyltransferase neurons in the rat neostriatum. Exp Brain Res 1979; 34:395-400. [PMID: 421755 DOI: 10.1007/bf00235684] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The fine structural localization of ChAc activity was studied in the rat neostriatum by a ultracytochemical method. The reaction products of ChAc activity were seen in the cisternal structures and plasma membrane of some medium-sized neurons. Some boutons with ChAc-positive vesicles were observed to make an axo-dendritic or axo-somatic symmetrical synapse.
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612
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Tamai Y, Ohtani Y, Miura S, Narita Y, Iwata T, Kaiya H, Namba M. Creutzfeldt-Jakob disease--alteration in ganglioside sphingosine in the brain of a patient. Neurosci Lett 1979; 11:81-6. [PMID: 372860 DOI: 10.1016/0304-3940(79)90060-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Gangliosides isolated from the brain of patients with Creutzfelt-Jakob (C-J) disease were analyzed. The ganglioside current was abnormally low, and the percentage distributions of individual gangliosides and the long-chain base compositions were abnormal. The C20-sphingosine contents of all the ganglioside fractions were low. Abnormalities in ganglioside long-chain bases in adult human brain have been reported previously only in patients with inherited metabolic disorders. These abnormalities in C-J disease seem to be closely related to the cause of the disease.
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613
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Iwata T, Suzuki T, Suenaga E, Moriwaki C. [Vasodepressor action of hog pancreatic kininogenase and its effect on plasma kininogen (author's transl)]. YAKUGAKU ZASSHI 1979; 99:45-50. [PMID: 430343 DOI: 10.1248/yakushi1947.99.1_45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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614
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Shinomiya Y, Toya S, Iwata T, Hosoda Y. Radioimmunoassay of alpha-fetoprotein in children with primary intracranial tumors. Pediatr Neurosurg 1979; 5:450-8. [PMID: 89937 DOI: 10.1159/000119840] [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: 12/12/2022]
Abstract
Serum alpha-fetoprotein (AFP) was measured in 10 cases of primary brain tumors in children (4 cases of medulloblastoma, 4 cases of germ cell tumor and 2 cases of astrocytoma). As a result, elevation in AFP was observed only in a case of embryonal carcinoma that showed partial mixture of germinoma. The absence of AFP elevation in 3 other cases of pure germinoma (atypical teratoma; pinealoma) agrees with reports which describe that, in the germ cell tumor of the gonads, a rise in AFP is not observed in pure seminoma but is found in embryonal carcinoma and endodermal sinus tumor (yolk sac tumor). The fluctuations in AFP in serum and cerebrospinal fluid are considered to be of significance in the diagnosis and treatment of primary intracranial malignant germ cell tumors.
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615
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Yagishita A, Shiga H, Tsutsui T, Seki T, Nishioka K, Iwata T, Ishiyama N, Shiobara R, Toya S, Mukai M. [Transcatheter embolization in the intracranial meningioma (author's transl)]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1978; 23:1445-51. [PMID: 731968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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616
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Toya S, Shiobara R, Ueda M, Ichikizaki K, Akiyama T, Shinomiya Y, Ishiyama N, Iwata T, Shiga H, Yagishita A, Mukai M. [Catheter embolization of the feeding vessels in six cases of intracranial meningiomas (author's transl)]. Neurol Med Chir (Tokyo) 1978; 18:803-11. [PMID: 83543 DOI: 10.2176/nmc.18pt2.803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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617
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Yoshimura T, Yashiki T, Mikami T, Iwato T, Moriuchi I, Iwata T, Ikeda K, Sone K, Ikeda S, Mori T, Tamura Y, Namba M. [Neuropathological studies on aged Japanese monkeys (Macaca fuscata): on cerebral vascular changes of aged monkeys (author's transl)]. Nihon Ronen Igakkai Zasshi 1978; 15:600-6. [PMID: 104071 DOI: 10.3143/geriatrics.15.600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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618
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Kobayashi K, Furuya Y, Aoyama D, Iwata T, Hokama Y, Nakano M, Ohnishi T, Inamori S, Suzuki H, Yamazaki Y, Matsusaki O. [Ischaemic colitis (author's transl)]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1978; 23:1365-72. [PMID: 722931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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619
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Moriuchi I, Kato H, Kaiya H, Iwato T, Mori T, Iwata T, Namba M. Computerized tomographical findings of epileptic patients in neuro-psychiatric clinic. FOLIA PSYCHIATRICA ET NEUROLOGICA JAPONICA 1978; 32:397-8. [PMID: 748126 DOI: 10.1111/j.1440-1819.1978.tb02807.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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620
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Kaiya H, Iwata T, Ikeda K, Namba M. Chlorpromazine causes vesicle population changes in the monoaminergic synapse of the rat caudate nucleus. EXPERIENTIA 1978; 34:645-9. [PMID: 207552 DOI: 10.1007/bf01937012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The population of monoaminergic synaptic vesicles in the rat caudate nucleus remained unchanged or slightly decreased 3 h after chlorpromazine (CP) administration, and clearly increased after 24 h. The diameter of synaptic vesicles became smaller when the vesicles increased. These findings suggest that CP causes presynaptic blocking in part of its actions and leads to a condition in which neural transmission is inactive. In the control animals, population of the vesicles tended to fluctuate following the circadian rhythm.
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621
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Iwata T, Kamei T, Uchino F, Mimaya H, Yanagaki T, Etoh H. Pathological study on amyloidosis--relationship of amyloid deposits in the aorta to aging. ACTA PATHOLOGICA JAPONICA 1978; 28:193-203. [PMID: 676743 DOI: 10.1111/j.1440-1827.1978.tb00531.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Senile aortic amyloidosis in 224 autopsy cases over 40 years was investigated comparing cardiac and pancreatic amyloidosis in them. A total of 176 cases of aortic amyloidosis was found for an average incidence of 79%. Under the 5th decade the incidence was 51% and it rose sharply with age and reached 95% in over the 8th decade. The incidence of cardiac amyloidosis also increased with age, but it was always higher in the aorta. Aortic and cardiac amyloid were both positive in the DMAB method for tryptophan. The major part exposed to amyloidosis in the aorta was the media. The medial amyloid consisted of numerous minute deposits and had no relation to atherosclerosis. Some comments about the pathogenesis of senile amyloidosis were also mentioned.
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622
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Takamizawa A, Matsumoto S, Iwata T, Makino I, Yamaguchi K, Uchida N, Kasai H, Shiratori O, Takase S. Synthesis and antitumor activity of preactivated isophosphamide analogues bearing modified alkylating functionalities. J Med Chem 1978; 21:208-14. [PMID: 621716 DOI: 10.1021/jm00200a013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In search of cancer chemotherapeutic agents with greater efficacy than cyclophosphamide, 4-hydroperoxyisophosphamide analogues bearing modified alkylating functionalities such as 2-bromoethyl, 2-iodoethyl, 2-methyl-sulfonyloxyethyl, and 2-ethylsulfonyloxyethyl groups were prepared by ozonolytic cyclization reaction of N,N'-substituted 3-butenyl phosphorodiamidates. Comparative cytotoxicity against L1210 cells and antileukemic life-span activity against L1210 implanted BDF1 mice of the newly synthesized compounds were tabulated. The 4-hydroperoxyisophosphamide analogues which have different alkylating groups in a molecule showed slightly greater cytoxicity in vitro than those with the same alkylating groups. Most of the compounds having different alkylating groups also showed high antileukemic activity in vivo. Among them, the highest efficacy was found for 2-[N-methyl-n-(2-chlorethyl)]amino-3-(2-methylsulfonyloxyethyl)-4-hydroperoxy-1,3,2-oxazaphosphorinane 2-xoide (NSC 280122D) whos life-span activity was also greater than that of 4-hydroperoxyisophosphamide, cyclophosphamide, and isoposphamide. The superiority of this compound was especially apparent by oral administration.
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623
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Saka H, Iwata T, Imura T. Temperature dependence of the stacking-fault energy in pure silver. ACTA ACUST UNITED AC 1978. [DOI: 10.1080/01418617808235441] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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624
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Kaiya H, Yoshinmura T, Iwata T, Moriuchi I, Ikeda K. [Thalamic dementia and akinetic mutism (author's transl)]. NO TO SHINKEI = BRAIN AND NERVE 1978; 30:75-9. [PMID: 637956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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625
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Tanaka I, Iwata T, Takahashi N, Ashida T, Tanihara M. Cyclo-L-leucyl-L-histidyl monohydrate. ACTA ACUST UNITED AC 1977. [DOI: 10.1107/s0567740877012382] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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626
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Takamizawa A, Iwata T, Matsumoto S. Studies on the urinary metabolites of isophosphamide and its activated species in rabbits. Chem Pharm Bull (Tokyo) 1977; 25:2900-9. [PMID: 603962 DOI: 10.1248/cpb.25.2900] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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627
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Iwata T. [Case study of the month: Down's syndrome. Nursing of a child with Down's syndrome--rehabilitation training with special reference to mealtime training]. KANGO TENBO. THE JAPANESE JOURNAL OF NURSING SCIENCE 1977; 2:1004-9. [PMID: 146116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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628
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Ichitani M, Kitano M, Kohno K, Iwata T. [Four cases of Morgagni diaphragmatic hernia operated successfully (author's transl)]. [ZASSHI] [JOURNAL]. NIHON KYOBU GEKA GAKKAI 1977; 25:1087-91. [PMID: 925454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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629
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Takamizawa A, Matsumoto S, Iwata T, Makino I. Synthesis, stereochemistry and antitumor activity of 4-hydroperoxyisophosphamide (NSC-227114) and related compounds. Chem Pharm Bull (Tokyo) 1977; 25:1877-91. [PMID: 562722 DOI: 10.1248/cpb.25.1877] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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630
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Kaiya H, Iwata T, Moriuchi I, Namba M. Chlorpromazine induces population increase of synaptic vesicles in the rat hypothalamic ventromedial nucleus. Biol Psychiatry 1977; 12:323-30. [PMID: 871486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The population of synaptic vesicles per synaptic area in the hypothalamic ventromedial nucleus of rats treated with chlorpromazine (CP) for 3 days was compared with that of controls. In type I synapse, which contained 400-800 A small spherical vesicles (s-vesicles), together with 800-1200 A large spherical dense-cored vesicles (lc-vesicles), the population of s-vesicles increased 57.8% in the CP rats, In type II synapse, which contained only s-vesicles, the rate of increase among CP animals was 15.4%. Findings suggested that CP blocks the release of the vesicles from the presynaptic site or inhibits the transport function for biogenic amines through the presynaptic membrane, and type I synapse may be aminergic.
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631
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Furuya Y, Aoyama D, Iwata T. [Colonic diverticulosis]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1977; 22:535-44. [PMID: 559794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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632
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Kaiya H, Moriuchi I, Iwata T, Ikeda K. [Atypical mitochondria and crystallines in chromatolytic neuronal swelling]. NO TO SHINKEI = BRAIN AND NERVE 1976; 28:1303-9. [PMID: 1036032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Chromatolytic neuronal swelling was observed in the various brain regions, e. g. precentral cortex, pons and anterior horn of the spinal cord etc., of a 50-year-old woman showing psycho-organic syndrome and various neurological symptoms over a period of 14 years. In these inflated, chromatolytic nerve cells, atypical mitochondrias and paracrystalline structures were seen. Atypical mitochondrias contained membranous trans-somal bridges composed of about 60 A parallel filaments with a spacing of about 80 A. Paracystalline structures consisted of 7-16 hexagonal lattices with electron-light dots 160 A in diameter and with 280 A spacing. The goniometer revealed another featue of the paracrystals, i.e., lamellar structures consisting of 4-10 parallel filaments 120 A thick with a spacing of 160 A. These paracrystals were compared with similar structures in physiological and pathological conditions and the significance of the atypical mitochondrias was discussed.
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633
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Kato H, Mori T, Moriuchi I, Yoshimura T, Iwata T. [Antiepileptic activity of clonazepam--an antiepileptic benzodiazepine derivative]. NO TO SHINKEI = BRAIN AND NERVE 1976; 28:565-77. [PMID: 1036151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Clonazepam, an antiepileptic benzodiazepine derivative was administered into 30 patients mainly with incurable type epilepsy. Results were as summarized below: (1) Clonazepam was effective in 44.4% of 36 cases of seizures. The initial effect was noticed in 55.6%. (2) Clonazepam was proved to have a broad spectrum in its efficacy. It showed the highest rate of effectiveness, 71.4%, on psychomotor seizures. (3) Clonazepam was effective in all 4 cases of the photogenic epilepsy which shows the photosensitivity in the EEG. With the exception of 1 case, the sensitivity in the EEG also disappeared responding to clonazepam. (4) The Jacksonian type of the partial motor seizure disappeared in 2 cases after the administration with clonazepam. (5) The effects of clonazepam of EEG were examined in 24 patients. The abnormality of the basic activity, the diffuse epileptic discharge and the focal epileptic discharge were improved in 29.2%, 61.5% and 66.7%, respectively. In addition, the rate of the clinical effectiveness was high in the cases with the centrencephalic discharge. (6) Side effects were observed to have appeared in 38.9% of the patients. They were mostly drowsiness and ataxia. (7) Based on the above-mentioned results, it can be claimed that clonazepam is effective on psychomotor seizures, photogenic epilepsy and the secondary type of generalized convulsion (Jacksonian).
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634
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Takamizawa A, Iwata T, Yamaguchi K, Shiratori O, Harada M. Stereochemistry, metabolism, and antitumor activity of 4-hydroperoxyisophosphamide (NSC-227114) and its stereoisomer. CANCER TREATMENT REPORTS 1976; 60:361-8. [PMID: 1277212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An acid-catalyzed isomerization of 4-hydroperoxyisophosphamide, a synthetic compound with potential antitumor activity, produced a new crystalline epimer having an inverted stereochemistry at the phosphorus atom. The stereochemistry of these epimeric hydroperoxides is discussed on the basis of their chemical and nuclear magnetic resonance properties. The epimers show essentially the same metabolic behavior. This behavior is, however, different from that of isophosphamide (IP) which is metabolized in part via pathways ineffective for its activation. The newly isolated epimer shows slightly higher activity against some kinds of experimental tumors than the original hydroperoxide, suggesting that the inverted stereochemistry of the alkylating group at the phosphorus atom is effective in promoting the antitumor activity of the activated species of IP.
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635
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Nambara T, Iwata T, Kigasawa K. Studies on steroids. CIX. O-omega-haloalkyloximes, new derivatives for gas chromatography-mass spectrometry of oxosteroids. J Chromatogr A 1976; 118:127-33. [PMID: 1254659 DOI: 10.1016/s0021-9673(00)81202-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Several kinds of omega-haloalkoxyamines have been prepared as new derivative-forming agents applicable for the gas chromatography-mass spectrometry of carbonyl compounds. Of these reagents, 2-chloroethoxyamine hydrochloride [O-(2-chloroethyl)hydroxylamine] was the most suitable for use with oxosteroids because of its higher reactivity and the appropriate retention value and satisfactory chromatographic properties of the resulting oximes. The contribution to the retention value due to formation of the 2-chloroethyloxime was determined for 5alpha-androstanones having the oxo-group at various positions in the steroid nucleus. As expected, 17-oxosteroid O-2-haloethyloximes exhibit readily distinguishable isotope peaks as a cluster in the mas spectrum.
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636
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Ostrovsky DS, Snyder JA, Iwata T, Izaka KI, Maglott DS, Nace GW. Frog lysozyme. I. Its identification, occurrence as isozymes, and quantitative distribution in tissues of the leopard frog, Rana pipiens. THE JOURNAL OF EXPERIMENTAL ZOOLOGY 1976; 195:279-90. [PMID: 4576 DOI: 10.1002/jez.1401950213] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In the course of examining the etiology of the Lucké renal adenocarcinoma of the frog, Rana pipiens, it was found that organs of the normal adult contain bacteriolytic enzymes. These enzymes all satisfied the six criteria for the identification of lysozymes and at least eight forms were separable by polyacrylamide gel electrophoresis. Their qualitative and quantitative distribution was organ-specific. All eight isozymes were found in normal kidney, while liver and spleen contained seven forms; skin, six; ovarian egg, five; and serum, two. In quantitative assays using a radial diffusion test, spleen had the greatest lysozyme concentration, followed in descending order by kidney, liver, skin, and ovary. Serum contained very low amounts. In terms of enzyme activity per animal, ovary was the highest ranking organ. As such a large number of lysozyme isozymes has not been reported in any other organism, their origins and functions are considered in the context of their presence in an ectotherm.
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637
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Iwata T, Ohkawa K, Uyama M. The fine structural localization of peroxidase activity in goblet cells of the conjunctival epithelium of rats. INVESTIGATIVE OPHTHALMOLOGY 1976; 15:40-4. [PMID: 1245379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cytochemical investigation of peroxidase was made on the conjunctival goblet cells, using the diaminobenzidine method. Many goblet cells in the conjunctiva demonstrated this reaction. The reaction was present in secretory granules as well as in the perinuclear cisterna, the rough endoplasmic reticulum, several Golgi saccules and adjacent small smooth-surfaced vesicles, and condensing vacuoles. Each secretory granule within a goblet cell showed a different degree of reaction, hence it is concluded that some goblet cells probably produce both mucous substance and peroxidase in one cell. The mode of production of peroxidase in goblet cells is concluded to be similar to that of secretory proteins in pancreatic exocrine cells. The enzyme, together with thiocyanate and endogenous hydrogen peroxide, is thought to serve as an anti-infectious agent in tears.
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638
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Nambara T, Kigasawa K, Iwata T, Ibuki M. Studies on steroids. III. A new type of derivative for electron capture-gas chromatography of ketosteroids. J Chromatogr A 1975; 114:81-6. [PMID: 127001 DOI: 10.1016/s0021-9673(00)85244-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pentafluorobenzyloxyamine is presented as a new derivatizing agent for gas chromatography of ketones using electron capture detection. The typical 17-ketosteroid was readily transformed into the O-pentafluorobenzyloxime which on usual trimethylsilylation led to a 3-trimethylsilyl ether derivative exhibiting good gas chromatographic properties. The derivatization procedure was applied to the determination of dehydroepiandrosterone in human plasma by electron capture-gas chromatography employing an internal standard method and in consequence satisfactory results were obtained.
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639
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Shiroishi K, Kjellström T, Anayama M, Shimada T, Iwata T. [Urinary beta-2-microglobulin level of the inhabitants in cadmium polluted districts]. Nihon Eiseigaku Zasshi 1975; 30:71. [PMID: 48572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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640
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Takamizawa A, Matsumoto S, Iwata T, Tochino Y, Katagiri K, Yamaguchi K. Studies on cyclophosphamide metabolites and their related compounds. 2. Preparation of an active species of cyclophosphamide and related compounds. J Med Chem 1975; 18:376-83. [PMID: 1121004 DOI: 10.1021/jm00238a011] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A synthetic study was made on the active metabolite of cyclophosphamide. Ozonolysis of O-(3 butenyl)-N,N-bis(2-chloroethyl)phosphorodiamidate, prepared by reaction of POC13 with 3-buten-1-ol followed by treatment with N,N-bis(2-chloroethyl)amine (nor mustard) and NH3, afforded 2-[bis(2-chloroethyl)amino]-4-hydroperoxytetrahydro-2H-1, 3,2-oxazaphosphorine 2-oxide (4-hydroperoxycyclophosphamide). Deoxygenation of 4-hydroperoxycyclophosphamide by triphenylphosphine yielded 4-hydroxycyclophosphamide in a pure crystalline state. These products exhibited high cytostatic activity in both in vitro and in vivo experiments. The results give confirmatory evidence for the hypothesis that C4-hydroxylation on the 1,3,2-oxazaphosphorinane ring of cyclophosphamide is necessary for its activation.
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641
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Nambara T, Goto J, Taguchi K, Iwata T. New derivatives for the gas chromatographic resolution of amino acid enantiomers. J Chromatogr A 1974; 100:180-4. [PMID: 4436404 DOI: 10.1016/s0021-9673(00)86053-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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642
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Takamizawa A, Matsumoto S, Iwata T, Tochino Y, Katagiri K. Synthesis and metabolic behavior of the suggested active species of isophosphamide having cytostatic activity. J Med Chem 1974; 17:1237-9. [PMID: 4416021 DOI: 10.1021/jm00257a024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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643
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Ishihara T, Iwata T, Furutani H, Uchino F, Maeda S. Relapsing polychondritis--report of a case with ultrastructural findings of the ear cartilage. ACTA PATHOLOGICA JAPONICA 1973; 23:577-90. [PMID: 4271293 DOI: 10.1111/j.1440-1827.1973.tb01225.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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644
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Nambara T, Iwata T, Bae Y, Akiyama S. [Gas-chromatography of steroid metabolites]. RINSHO BYORI. THE JAPANESE JOURNAL OF CLINICAL PATHOLOGY 1973; 21:593-8. [PMID: 4147071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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645
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Iwata T, Stowe BB. Probing a Membrane Matrix Regulating Hormone Action: II. The Kinetics of Lipid-Induced Growth and Ethylene Production. PLANT PHYSIOLOGY 1973; 51:691-701. [PMID: 16658394 PMCID: PMC366330 DOI: 10.1104/pp.51.4.691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Lipids which are active oleanimins, i.e., those which stimulate respiration and auxin-induced cell elongation of pea stem sections, also initiate a period of ethylene formation in them after a lag period of at least 1 hour. Production of ethylene requires auxin, is inhibited by cycloheximide and dinitrophenol applied during or before the lag period, and is greatly stimulated by lipids longer than 20 Angstroms in length such as heptadecyl-benzene, chloro- or iodohexadecane, triolein, and vitamins E and K(1), but not by the shorter chloro- and iododecane. beta-Stigmasterol at 10 to 40 mum concentrations depresses both oleanimin-induced growth and ethylene formation.The effect of oleanimins on the growth rate steadily declines and disappears after 6 hours, whereas oleanimin induction of ethylene stays at a high level until it rapidly disappears after 6 hours. Nongrowing second internode sections also produce ethylene on oleanimin treatment, so ethylene formation is not dependent on cell elongation even though it requires auxin. Preincubation with heptadecylbenzene or auxin does not change the delay of an hour or more before ethylene is produced, whereas increases in growth are noted at the earliest measurements. Oleanimins stimulate growth at less than optimal auxin concentration, even as low as 20 nm, where a proportional ethylene formation is not noted. It is concluded that ethylene formation is not causally related to growth in these tissues.The decline in oleanimin-induced ethylene formation is not changed by renewal of the incubation medium, and sucrose which is required to maintain growth for 20 hours does not influence growth or ethylene formation up to 6 hours. l-Methionine increases ethylene formed after heptadecylbenzene treatment, but unexpectedly, malonate is much more effective.Auxin concentrations supraoptimal for growth cause no growth rate reductions for the first 10 hours, but they greatly enhance oleanimin-induced ethylene formation even when heptadecylbenzene is added after 6 hours. Applied ethylene even at concentrations much above those produced by the tissue itself fails to stimulate or inhibit short term pea stem section growth. It is concluded that the effect of oleanmins on growth is not mediated by ethylene. The similarities in concentration and molecular dimensions of these structurally diverse lipids which simultaneously stimulate respiration, growth, and ethylene formation, suggest a single site of action located in a regulatory membrane.
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646
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Takamizawa A, Tochino Y, Hamashima Y, Iwata T. Studies on cyclophosphamide metabolites and their related compounds. I. Chem Pharm Bull (Tokyo) 1972; 20:1612-6. [PMID: 4639303 DOI: 10.1248/cpb.20.1612] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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647
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Suga S, Hirota Y, Shimaji T, Koide A, Iwata T. [Chemotherapy of gastric cancer--combination chemotherapy of mitomycin C, 5-fluorouracil and cytosine arabinoside]. GAN NO RINSHO. JAPAN JOURNAL OF CANCER CLINICS 1972; 18:209-13. [PMID: 5063950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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648
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Yashida N, Kuriyama K, Iwata T, Otsuka H. A study on the interaction of ribonuclease ST with guanosine 3'-monophosphate by circular dichroism. Biochem Biophys Res Commun 1971; 43:954-61. [PMID: 5105943 DOI: 10.1016/0006-291x(71)90555-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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649
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Iwata T, Ishii S. Local difference in concentration of vasopressin and monoamines in the equine median eminence. ENDOCRINOLOGIA JAPONICA 1970; 17:599-604. [PMID: 5537774 DOI: 10.1507/endocrj1954.17.599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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650
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Sugiura M, Ogiso T, Iwata T, Kato Y. [Studies on separative determination on enzymes. VII. On the separative determination of bacterial alpha-amylase in a mixture of pancreatic, bacterial and Aspergillus alpha-amylase. (Studies on enzymes. LIV)]. YAKUGAKU ZASSHI 1970; 90:1381-5. [PMID: 4992013 DOI: 10.1248/yakushi1947.90.11_1381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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