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Frey W, Jäger V. Crystal structure of (2H,3S,45,5S)-5-(íerí-butyldimethylsilyl)-3,4-isopropylidene- 2-methylpiperidine-1,3,4,5-tetrol, C15H31NO4Si. Z KRIST-NEW CRYST ST 2002. [DOI: 10.1524/ncrs.2002.217.1.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gültekin Ζ, Frey W, Jäger V. Crystal structure of (3aS,4R,5S,6R)-4-acetoxy-5,6-isopropylidenedioxy-3a,4,5,6-tetrahydro-3//-cyclopent[c]isoxazole, C11H15NO5. Z KRIST-NEW CRYST ST 2002. [DOI: 10.1524/ncrs.2002.217.jg.405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gültekin Z, Frey W, Jäger V. Crystal structure of 6,6-bis(methyl2,3-O-isopropylidene-6-deoxy-α-Dmannopyranoside), C20H34O10. Z KRIST-NEW CRYST ST 2002. [DOI: 10.1524/ncrs.2002.217.jg.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Boltze C, Schneider-Stock R, Jäger V, Roessner A. Distinction between lipoma and liposarcoma by MDM2 alterations: a case report of simultaneously occurring tumors and review of the literature. Pathol Res Pract 2002; 197:563-8. [PMID: 11518050 DOI: 10.1078/0344-0338-00128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We investigated a lipoma and a well-differentiated/dedifferentiated liposarcoma (WD/DDL), occurring simultaneously in one patient for the possible role of p53 and mdm2 in the molecular oncogenesis of liposarcoma and tumor progression. The hypothesis tested was if there is a continuum in the development from lipoma to liposarcoma. Lipoma was characterized by a lack of p53 mutation, p53 LOH and p53 protein expression, as well as by mdm2 amplification and mdm2 protein expression. p53 mutation and p53 LOH were found neither in the well-differentiated nor in the dedifferentiated parts of the liposarcoma. In contrast, mdm2 amplification and an increase in mdm2 protein expression were found to be associated with malignancy and dedifferentiation, whereas p53 protein expression was only slightly increased. These findings indicate that mdm2 constitutes one of the most common targets for molecular aberration in WD/DDL. We suggest that mdm2 is a marker distinguishing between ordinary lipoma and well-differentiated liposarcoma, and that the genesis of these tumors is different.
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Gültekin Z, Frey W, Jäger V. Crystal structure of (3aS,4R,5S,6R,6aS)-4,5,6-trihydroxy-5,6-O-isopropylidene- 3,3a,4,5,6,6a-hexahydro-1H-cyclopent[c]isoxazole, C9H15NO4. Z KRIST-NEW CRYST ST 2002. [DOI: 10.1524/ncrs.2002.217.2.279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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56
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Gültekin Z, Frey W, Jäger V. Crystal structure of (1S,2R,3S,4S,5R)-7-benzyl-2,3-O-isopropylidene-6-oxa-7-aza-bicyclo[3.2.1]octan-2,3,4-triol, C16H21NO4. Z KRIST-NEW CRYST ST 2002. [DOI: 10.1524/ncrs.2002.217.2.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jäger V. [Not Available]. MEDIZIN, GESELLSCHAFT, UND GESCHICHTE : JAHRBUCH DES INSTITUTS FUR GESCHICHTE DER MEDIZIN DER ROBERT BOSCH STIFTUNG 2001:171-88. [PMID: 11623294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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58
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Kleban M, Hilgers P, Greul JN, Kugler RD, Li J, Picasso S, Vogel P, Jäger V. Amino(hydroxymethyl)cyclopentanetriols, an emerging class of potent glycosidase inhibitors--Part I: Synthesis and evaluation of beta-D-pyranoside analogues in the manno, gluco, galacto, and GlcNAc series. Chembiochem 2001; 2:365-8. [PMID: 11828465 DOI: 10.1002/1439-7633(20010504)2:5<365::aid-cbic365>3.0.co;2-m] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Greul JN, Kleban M, Schneider B, Picasso S, Jäger V. Amino(hydroxymethyl)cyclopentanetriols, an emerging class of potent glycosidase inhibitors--Part II: Synthesis, evaluation, and optimization of beta-D-galactopyranoside analogues. Chembiochem 2001; 2:368-70. [PMID: 11828466 DOI: 10.1002/1439-7633(20010504)2:5<368::aid-cbic368>3.0.co;2-a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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60
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Henkel S, Kleban Μ, Jäger V. Crystal structure of(3aS,4S,5R,6S,6aS)-1-benzyl-4,5,6-trihydroxy-4,5-0-isopropylidene-3,3a,4,5,6,6a-hexahydro-1H-cyclopent[c]-isoxazole,C16H21NO4. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.89] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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61
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Henkel S, Shaw D, Lieberknecht A, Jäger V. Crystal structure of methyl 2,3-di-0-benzyl-4,6-cyclo-4,6-dideoxy-ß- D-galactopyranoside, C21H24O4. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Frey W, Hilgers P, Jäger V. Crystal structure of(3aS,4R,5S,6R,6aS)-4,5,6-trihydroxy-1-phenyl-3,3a,4,5,6,6a-hexahydro-1H-cycopent[c]-isoxazole,C12H15N1O4. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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63
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Frey W, Hilgers P, Jäger V. Crystal structure of (3aS,4R,5S,6R,6aS)-4,5,6-triacetoxy-1-phenyl- 3,3a,4,5,6,6a-hexahydro-1H-cyclopent[c]-isoxazole, C18H21NO7. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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64
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Henkel S, Shaw D, Dong HQ, Jäger V. Crystalstructureof(1S,2R,3R,5aR,6S,7R,8R,10aR)-5,10-di-(tert-butoxy-carbonyl)-3,8-di-(iodomethyl)-1,2:6,7-di-isopropylidenedioxy-perhydro-dipyrrolo[1,2-b:1,2-e]-1,2,4,5-tetrazine,C26H42I2N4O8. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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65
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Frey W, Hilgers P, Kleban M, Jäger V. Crystal structure of (3aR,4R,5S,6S,6aR)-4,5,6-triacetoxy-1-benzyl- 3,3a,4,5,6,6a-hexahydro-1H-cyclopent[c]-isoxazole, C19H23NO7. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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66
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Henkel S, Shaw D, Jäger V. Crystal structure of (3R,4R,5R)-5-iodomethyl-3,4-O-isopropylidenedioxy-1 - phenylamino-pyrrolidine-2-one, C14H17IN2O3. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Chico E, Jäger V. Perfusion culture of baculovirus-infected BTI-Tn-5B1-4 insect cells: a method to restore cell-specific beta-trace glycoprotein productivity at high cell density. Biotechnol Bioeng 2000; 70:574-86. [PMID: 11042554 DOI: 10.1002/1097-0290(20001205)70:5<574::aid-bit12>3.0.co;2-q] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The impact of different cultivation-infection strategies on the productivity of baculovirus-infected BTI-Tn-5B1-4 (High Five) cells was investigated. Using beta-trace protein as the recombinant glycoprotein, the effects of multiplicity of infection (MOI) and time of infection (TOI) were studied on growth after infection as well as the degree of infection and recombinant protein productivity in batch culture. The highest productivities were found when infecting Tn5 cells at early exponential growth phase (EGP) (low cell density) using a high MOI. To increase the productive cell density of Tn5 cells after beta-trace-baculovirus infection, we performed studies infecting cells in the range of 1 to 5 x 10(6) cells/mL in fresh medium. Although the protein production was increased twofold, a strong negative cell density effect was still observed when maximal productive cell density exceeded 1 x 10(6) cells/mL. To verify whether the changing cell environment of the batch experiments was responsible for the decrease in protein productivity at increasing cell density at infection, several perfusion experiments were designed by infecting Tn5 cells at cell densities over 2 x 10(6) cells/mL under more steady-state conditions. The use of this experimental setup enabled successful infections at high cell densities with volumetric productivities of up to 1.2 g L(-1) day(-1) of beta-trace protein, which is very high for a glycoprotein expressed with the baculovirus expression vector system (BEVS). The cell specific protein productivity observed after infections at higher cell densities in perfusion mode was the same as in batch experiments at low cell concentrations, which clearly demonstrates that the cell density effect could be completely overcome with perfusion cultivation.
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Zimmermann PJ, Blanarikova I, Jäger V. A General Approach to L-(+)-Furanomycin and Some Stereoisomers and Analogues Using Furoisoxazoline Intermediates Syntheses via Isoxazolines, Part 24. Part of the planned dissertation of P. J. Zimmermann. We thank the Volkswagen-Stiftung, Hannover, the Fonds der Chemischen Industrie, the Landesgraduiertenförderung Baden-Württemberg (doctoral fellowship to P.J.Z.), and Bayer AG, Wuppertal, for financial support of this work. I.B. gratefully acknowledges a grant from the Volkswagen-Stiftung for a research stay at Stuttgart. We thank Dr. W. Frey for the X-ray crystal structure determinations. This work was presented at the 17th ICHC, Vienna, in August 1999, Book of Abstracts OP-61. Part 23: ref. 1. Angew Chem Int Ed Engl 2000; 39:910-912. [PMID: 10760890 DOI: 10.1002/(sici)1521-3773(20000303)39:5<910::aid-anie910>3.0.co;2-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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69
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Henkel S, Fengler-Veith Μ, Jäger V. Crystal structure of (+)-(4S,5R,2’R,4’S,5’R,1’’S)-5-(2’’-acetoxy-1’’- benzyloxy-ethyl)-3-(5’-acetoxy-2’-methyl-1’,3’-dioxan-4’-yl)-4-(tert-butoxycarbonylamino)-4,5-dihydro-isoxazole, C26H36N2O10. Z KRIST-NEW CRYST ST 2000. [DOI: 10.1515/ncrs-2000-0168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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70
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Henkel S, Fengler-Veith Μ, Jäger V. Crystal structure of (+)-(3aS,6aS,1’R)-6-oxo-3-(1’-O-benzyl-1’, 2’-dihydroxyethyl)-3a,4,6a-tetrahydrofuro[3,4-d]isoxazole, C14H15NO5. Z KRIST-NEW CRYST ST 2000. [DOI: 10.1515/ncrs-2000-0167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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71
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Frey W, Zimmermann PJ, Jäger V. Crystal structure of (25,3R,4R,5S,1’R,2’S)-3,4-dimethanesulfonyloxy- 2- [2,3-O-isopropylidenedioxy-1 -(tert-butoxycarbonylamino)propyl]-5-methyl-tetrahydrofuran ethyl acetate, C18H33NO11S2 · C4H8O2. Z KRIST-NEW CRYST ST 2000. [DOI: 10.1515/ncrs-2000-0165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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72
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Frey W, Blanarikova I, Zimmermann PJ, Jäger V. Crystal structure of (2S,3R,4S,1’R,2'S)-3,4-dimethanesulfonyloxy- 2-[2,3-O-isopropylidenedioxy-1-(tert-butoxycarbonylamino)propyl]- 5,5-dimethyl-tetrahydrofuran, C19H35NO11S2. Z KRIST-NEW CRYST ST 2000. [DOI: 10.1515/ncrs-2000-0166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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73
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Frey W, Zimmermann PJ, Jäger V. Crystal structure of (2S,3R,4R,5R,1’R,2’S)-3,4-dimethanesulfonyloxy- 2-[2,3-O-isopropylidenedioxy-1-(tert-butoxycarbonylamino)propyl]- 5-methyl-tetrahydrofuran, C18H33NO11S2. Z KRIST-NEW CRYST ST 2000. [DOI: 10.1515/ncrs-2000-0164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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74
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Henkel S, Pruschek P, Kuban J, Jäger V. Crystal structure of (3aS,4R,5S,6R,6aS)-4,5,6-triacetoxy- 1-benzyl-3,3a,4,5,6,6a-hexahydro-1H-cyclopent[c]-isoxazole, C19H23NO7. Z KRIST-NEW CRYST ST 1999. [DOI: 10.1515/ncrs-1999-0351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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75
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Frey W, Gracza Τ, Hasenöhrl T, Lieberknecht Α, Jäger V. Crystal structure of (3aR,5S,6R,6aR)-6-hydroxy-5-hydroxymethyl-perhydrofuro[3,2-b]furan-2-one, C7H10O5. Z KRIST-NEW CRYST ST 1999. [DOI: 10.1515/ncrs-1999-0255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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