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Volk R, Schwartz JJ, Li J, Rosenberg RD, Simons M. The role of syndecan cytoplasmic domain in basic fibroblast growth factor-dependent signal transduction. J Biol Chem 1999; 274:24417-24. [PMID: 10446222 DOI: 10.1074/jbc.274.34.24417] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
To determine the role played by syndecan-4 cytoplasmic domain in the mediation of basic fibroblast growth factor (bFGF) signaling, immortalized human cells (ECV) were used to generate cell lines expressing constructs encoding full-length sequences for syndecan-4 (S4), syndecan-1 (S1), glypican-1 (G1), or chimeric proteins consisting of the ectoplasmic domain of glypican-1 linked to the transmembrane/cytoplasmic domain of syndecan-4 (G1-S4c) and the ectoplasmic domain of syndecan-4 linked to the glypican-1 glycosylphosphatidylinositol (GPI) anchor sequence (S4-GPI). Vector-transduced cells (VC) were used as controls. Expression of all these proteoglycans (except for the vector control) significantly increased cell-associated heparan sulfate mass and the number of low affinity bFGF-binding sites. However, in low serum medium, the addition of bFGF stimulated growth and migration of cells expressing S4 and G1-S4c constructs but not G1, S1, S4-GPI, or VC cells. Similar results were obtained using Matrigel growth assays. Mutations of heparan sulfate attachment sites on S4 construct abolished syndecan-4-dependent augmentation of bFGF responses. We conclude that cytoplasmic tail of syndecan-4 plays an important role in bFGF-mediated signal transduction.
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Lu H, Dhanabal M, Volk R, Waterman MJ, Ramchandran R, Knebelmann B, Segal M, Sukhatme VP. Kringle 5 causes cell cycle arrest and apoptosis of endothelial cells. Biochem Biophys Res Commun 1999; 258:668-73. [PMID: 10329443 DOI: 10.1006/bbrc.1999.0612] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Angiostatin which contains the first four kringle domains of plasminogen has been documented to be a potent inhibitor of angiogenesis. More recently, another kringle structure within plasminogen but outside angiostatin, known as kringle 5 (K5), was found to inhibit endothelial cell proliferation and migration. Here, we report the cloning and expression of mouse kringle 5 (rK5) in a bacterial expression system. The protein was purified to homogeneity using a Ni-NTA column. rK5 inhibited both proliferation and migration of endothelial cells with ED50's of 10 nM and < 500 nM, respectively. In addition, we show for the first time that rK5 causes cell cycle arrest and apoptosis, shedding further insight into rK5's mechanism of action. Finally, we show that these actions are endothelial cell specific.
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Dhanabal M, Volk R, Ramchandran R, Simons M, Sukhatme VP. Cloning, expression, and in vitro activity of human endostatin. Biochem Biophys Res Commun 1999; 258:345-52. [PMID: 10329390 DOI: 10.1006/bbrc.1999.0595] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Endostatin, a 20 kDa C-terminal fragment of collagen XVIII, is a specific inhibitor of endothelial cell proliferation and angiogenesis. In the present study, we have expressed human endostatin in a yeast expression system (10 mg/L). The recombinant protein was expressed in a soluble form and purified to homogeneity. It specifically inhibited the proliferation and migration of endothelial cells. In addition, we report for the first time that endostatin caused G1 arrest of endothelial cells. Also, we show that endostatin treatment resulted in apoptosis of HUVE and HMVE cells and that all of these effects do not occur in nonendothelial cells. Collectively, these findings demonstrate the expression of a biologically active form of human endostatin in yeast and provide important mechanistic insight into endostatin action on endothelial cells.
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Ramchandran R, Dhanabal M, Volk R, Waterman MJ, Segal M, Lu H, Knebelmann B, Sukhatme VP. Antiangiogenic activity of restin, NC10 domain of human collagen XV: comparison to endostatin. Biochem Biophys Res Commun 1999; 255:735-9. [PMID: 10049780 DOI: 10.1006/bbrc.1999.0248] [Citation(s) in RCA: 185] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Based on a homology search with endostatin, the C-terminus 185 aa of collagen XVIII, we report the cloning, expression, and antiangiogenic activity of a 22 kDa human collagen XV fragment, that we have named restin. Restin was expressed in the prokaryotic pET expression system. We have shown that restin inhibits the migration of endothelial cells in vitro but has no effect on the proliferation of these cells. A polyclonal antibody raised against endostatin cross-reacted with restin. Systemic administration of restin suppressed the growth of tumors in a xenograft renal carcinoma model.
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Dhanabal M, Ramchandran R, Volk R, Stillman IE, Lombardo M, Iruela-Arispe ML, Simons M, Sukhatme VP. Endostatin: yeast production, mutants, and antitumor effect in renal cell carcinoma. Cancer Res 1999; 59:189-97. [PMID: 9892206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Endostatin is a Mr 20,000 COOH-terminal fragment of collagen XVIII that inhibits the growth of several primary tumors. We report here the cloning and expression of mouse endostatin in both prokaryotic and eukaryotic expression systems. Soluble recombinant protein expressed in yeast (15-20 mg/L) inhibited the proliferation and migration of endothelial cells in response to stimulation by basic fibroblast growth factor. A rabbit polyclonal antibody was raised that showed positive immunoreactivity to the recombinant protein expressed from both systems. Importantly, the biological activity of the mouse recombinant protein could be neutralized by this antiserum in both endothelial proliferation and chorioallantoic membrane assays. Systemic administration of endostatin at 10 mg/kg suppressed the growth of renal cell cancer in a nude mouse model. The inhibition of tumor growth with soluble yeast-produced protein was comparable to that obtained with non-refolded precipitated protein expressed from bacteria. In addition, two closely related COOH-terminal deletion mutants of endostatin were also tested and showed strikingly differing activity. Collectively, these findings demonstrate the expression of a biologically active form of mouse endostatin in yeast, define a role for the molecule in inhibiting endothelial cell migration, extend its antitumor effects to renal cell carcinoma, and provide a formal proof (via the neutralizing antiserum experiments and the mutant data) that endostatin (and not a possible contaminant) acts as an antiangiogenic agent. Finally, the high level expression of mouse endostatin in yeast serves as an endotoxin free, soluble source of protein for fundamental studies on the mechanisms of tumor growth suppression by angiogenesis inhibitors.
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Abstract
Heparan sulfates in the extracellular matrix are required for a variety of biological processes, including cellular response to heparin-binding growth factors. However, little is known regarding the regulation of their expression and composition under pathophysiological conditions. In the present study, we have investigated the regulation of expression of two key heparan sulfate chain-carrying core proteins, syndecan-1 and syndecan-4, in a mouse/rat infarct model of tissue injury and repair. Induction of myocardial infarction was associated with a prompt increase in expression of both syndecan genes. Although infiltrating macrophages accounted for a substantial increase in syndecan expression, increased expression was noted in the levels of syndecan-1 mRNA in endothelial cells and syndecan-4 mRNA in cardiac myocytes. This increase in expression was limited to the immediate peri-infarct region and was absent from remote areas of the left or right ventricles. The influx of blood-derived macrophages in the heart correlated with the appearance of PR-39 peptide, which has previously been shown to increase syndecan expression in vitro. Studies in the op/op mice strain (which demonstrates sharply reduced levels of circulating monocytes) showed that myocardial infarction was associated with markedly reduced levels of macrophage influx and corresponding reduction in the expression of PR-39 and both syndecan genes. Pretreatment of op/op mice with granulocyte macrophage colony-stimulating factor restored myocardial macrophage content with corresponding restoration of PR-39/syndecan expression. In summary, myocardial infarction is associated with a distinct spatial and temporal pattern of syndecan-1 and -4 gene expression, which is induced by an influx of blood-derived macrophages.
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Richter G, Krieger C, Volk R, Kis K, Ritz H, Götze E, Bacher A. Biosynthesis of riboflavin: 3,4-dihydroxy-2-butanone-4-phosphate synthase. Methods Enzymol 1997; 280:374-82. [PMID: 9211332 DOI: 10.1016/s0076-6879(97)80128-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Kis K, Volk R, Bacher A. Biosynthesis of riboflavin. Studies on the reaction mechanism of 6,7-dimethyl-8-ribityllumazine synthase. Biochemistry 1995; 34:2883-92. [PMID: 7893702 DOI: 10.1021/bi00009a019] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The lumazine synthase/riboflavin synthase complex of Bacillus subtilis consists of an icosahedral capsid of 60 beta subunits surrounding a core of 3 alpha subunits. The beta subunits catalyze the condensation of 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione with (3S)-3,4-dihydroxy-2-butanone under formation of 6,7-dimethyl-8-ribityllumazine. This intermediate is converted to riboflavin by the alpha subunits via an unusual dismutation yielding 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione as second product. (3R)- and (3S)-3,4-dihydroxy-2-butanone 4-phosphate were synthesized. Both enantiomers can serve as substrate for 6,7-dimethyl-8-ribityllumazine synthase. The reaction rate of the natural S-enantiomer is about 6-fold higher than that of the R-enantiomer. The Km value for (3S)-3,4-dihydroxy-2-butanone 4-phosphate is 130 microM, and the Km value for the pyrimidine substrate is 5 microM. Diacetyl and 3,4-dihydroxy-2-butanone 3-phosphate do not serve as substrates for lumazine synthase. The enzyme-catalyzed condensation of the carbohydrate with the pyrimidine is strictly regiospecific. The enzyme does not catalyze the exchange of protons between (3S)-3,4-dihydroxy-2-butanone 4-phosphate and solvent water in the absence of the pyrimidine cosubstrate. A reaction mechanism starting with the formation of a Schiff base followed by elimination of phosphate and cyclization is proposed. The lumazine synthase activities of the native enzyme complex and of reconstituted, hollow beta 60 capsids are virtually identical (about 12,000 nmol mg-1 h-1).
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Witzgall R, Volk R, Yeung RS, Bonventre JV. Genomic structure and chromosomal location of the rat gene encoding the zinc finger transcription factor Kid-1. Genomics 1994; 20:203-9. [PMID: 8020966 DOI: 10.1006/geno.1994.1154] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We have previously cloned and sequenced a novel zinc finger cDNA, Kid-1, from the rat. Because of its developmentally regulated expression pattern and its suppression after renal injury, as well as its kidney-predominant expression, we propose that Kid-1 is likely to play an important role in renal gene regulation. Kid-1 encodes a predicted protein with 13 zinc fingers at the carboxy end and Krüppel-associated box (KRAB) A and B regions at the amino terminus. Expression of a Kid-1-GAL4 chimeric protein results in strong transcriptional repression of cotransfected constructs containing GAL4 binding sites and a chloramphenicol acetyl transferase gene driven by either a minimal promoter or a SV40 enhancer. We now report the cloning, structural organization, and chromosomal localization of the Kid-1 gene. The Kid-1 gene is composed of four exons and three introns, closely reflecting the organization of the Kid-1 protein. The KRAB A and B regions are encoded by the second and third exons, respectively. The entire zinc finger region is encoded by the fourth exon. Using a combination of linkage analysis and somatic cell hybrid analysis, Kid-1 was mapped to rat chromosome (RNO) 10. Kid-1, Il3, and Sparc form a tight linkage group on RNO10. Regional sublocalization to RNO10q21.3-q22 was established by fluorescence in situ hybridization.
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Sellmayer A, Goessl C, Obermeier H, Volk R, Reder E, Weber C, Weber PC. Differential induction of eicosanoid synthesis in monocytic cells treated with retinoic acid and 1,25-dihydroxy-vitamin D3. PROSTAGLANDINS 1994; 47:203-20. [PMID: 8016390 DOI: 10.1016/0090-6980(94)90061-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Synthesis and release of eicosanoids is characteristic to mature monocytes, while in undifferentiated premonocytic cells arachidonic acid (AA) metabolism is barely detectable. Since some vitamins and cytokines induce differentiation of these cells to a more monocyte-like cell type, we evaluated the effect of retinoic acid (RA), 1,25(OH)2-vitamin D3 (1,25-D3) and interferon-gamma (IFN-gamma) on AA metabolism in the human premonocytic cell lines U937 and THP-1. In U937 cells, differentiation with RA (1 microM) followed by stimulation with the calcium ionophore A23187 (10 microM) or platelet activating factor (PAF; 100 nM) significantly increased synthesis of immunoreactive 6-keto PGF1 alpha, TxB2 and PGE2 5- to 6-fold. Analysis of AA metabolism in RA-differentiated cells prelabelled with [3H]-AA revealed the formation of additional radioactive compounds which coeluted with standards for PGF2 alpha, PGD2 and 12-hydroxyheptadecatrienoic acid (HHT). The structural identity of 6-keto PGF1 alpha, TxB2, PGE2 and HHT was confirmed by gas chromatography-mass spectrometry (GC-MS). In parallel, RA induced the expression of the monocytic surface antigen CD11b, but not CD14. Differentiation with 1,25-D3 (10 nM) only marginally increased stimulated eicosanoid formation, while it more effectively induced expression of CD11b and CD14. Pretreatment with IFN-gamma (100 IU/ml) slightly increased stimulus-dependent AA metabolism, but did not induce expression of CD11b or CD14. Induction of eicosanoid synthesis by RA was further confirmed in THP-1 cells. These data indicate that RA most effectively induced cyclooxygenase activity and stimulus-dependent eicosanoid formation in U937 and THP-1 cells. Furthermore, since expression of monocytic surface antigens differed between RA and 1,25-D3, it is suggested that induction of cyclooxygenase activity may correlate to differentiation into distinct monocytic phenotypes.
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Richter G, Ritz H, Katzenmeier G, Volk R, Kohnle A, Lottspeich F, Allendorf D, Bacher A. Biosynthesis of riboflavin: cloning, sequencing, mapping, and expression of the gene coding for GTP cyclohydrolase II in Escherichia coli. J Bacteriol 1993; 175:4045-51. [PMID: 8320220 PMCID: PMC204833 DOI: 10.1128/jb.175.13.4045-4051.1993] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
GTP cyclohydrolase II catalyzes the first committed step in the biosynthesis of riboflavin. The gene coding for this enzyme in Escherichia coli has been cloned by marker rescue. Sequencing indicated an open reading frame of 588 bp coding for a 21.8-kDa peptide of 196 amino acids. The gene was mapped to a position at 28.2 min on the E. coli chromosome and is identical with ribA. GTP cyclohydrolase II was overexpressed in a recombinant strain carrying a plasmid with the cloned gene. The enzyme was purified to homogeneity from the recombinant strain. The N-terminal sequence determined by Edman degradation was identical to the predicted sequence. The sequence is homologous to the 3' part of the central open reading frame in the riboflavin operon of Bacillus subtilis.
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Richter G, Volk R, Krieger C, Lahm HW, Röthlisberger U, Bacher A. Biosynthesis of riboflavin: cloning, sequencing, and expression of the gene coding for 3,4-dihydroxy-2-butanone 4-phosphate synthase of Escherichia coli. J Bacteriol 1992; 174:4050-6. [PMID: 1597419 PMCID: PMC206115 DOI: 10.1128/jb.174.12.4050-4056.1992] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
3,4-Dihydroxy-2-butanone 4-phosphate is biosynthesized from ribulose 5-phosphate and serves as the biosynthetic precursor for the xylene ring of riboflavin. The gene coding for 3,4-dihydroxy-2-butanone 4-phosphate synthase of Escherichia coli has been cloned and sequenced. The gene codes for a protein of 217 amino acid residues with a calculated molecular mass of 23,349.6 Da. The enzyme was purified to near homogeneity from a recombinant E. coli strain and had a specific activity of 1,700 nmol mg-1 h-1. The N-terminal amino acid sequence and the amino acid composition of the protein were in agreement with the deduced sequence. The molecular mass as determined by ion spray mass spectrometry was 23,351 +/- 2 Da, which is in agreement with the predicted mass. The previously reported loci htrP, "luxH-like," and ribB at 66 min of the E. coli chromosome are all identical to the gene coding for 3,4-dihydroxy-2-butanone 4-phosphate synthase, but their role had not been hitherto determined. Sequence homology indicates that gene luxH of Vibrio harveyi and the central open reading frame of the Bacillus subtilis riboflavin operon code for 3,4-dihydroxy-2-butanone 4-phosphate synthase.
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Volk R, Bacher A. Biosynthesis of riboflavin. Studies on the mechanism of L-3,4-dihydroxy-2-butanone 4-phosphate synthase. J Biol Chem 1991; 266:20610-8. [PMID: 1939111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The riboflavin precursor, L-3,4-dihydroxy-2-butanone 4-phosphate, is formed from D-ribulose 5-phosphate by a single 24-kDa enzyme. Studies with various specifically 13C-labeled D-ribulose 5-phosphates as substrate showed that the carbon atoms 1-3 of the enzyme product correspond to carbon atoms 1-3 of the substrate, whereas C-4 of the product stems from C-5 of the substrate. Carbon atom 4 of the substrate is released as formate together with the hydrogen atom attached to it. The skeletal rearrangement which leads to the loss of C-4 and the direct linkage between C-3 and C-5 of the substrate is an intramolecular reaction. The hydrogen atom at C-3 of the enzyme product is introduced from solvent water. A reaction mechanism which is in agreement with all experimental data is proposed.
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Volk R, Bacher A. Biosynthesis of riboflavin. Studies on the mechanism of L-3,4-dihydroxy-2-butanone 4-phosphate synthase. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)54753-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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40
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Volk R, Bacher A. Studies on the 4-carbon precursor in the biosynthesis of riboflavin. Purification and properties of L-3,4-dihydroxy-2-butanone-4-phosphate synthase. J Biol Chem 1990; 265:19479-85. [PMID: 2246238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The formation of the riboflavin precursor, 6,7-dimethyl-8-ribityllumazine, from 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione requires a phosphorylated 4-carbon intermediate which has been designated as Compound X (Neuberger, G., and Bacher, A. (1985) Biochem. Biophys. Res. Commun. 127, 175-181). The enzyme catalyzing the formation of Compound X has been purified about 600-fold from the cell extract of the flavinogenic yeast Candida guilliermondii by chromatographic procedures. The purified protein appeared homogeneous as judged by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and consisted of a single polypeptide of 24 kDa. The committed substrate of the enzyme was identified as D-ribulose 5-phosphate. The enzyme yields two products which were identified as L-3,4-dihydroxy-2-butanone 4-phosphate and formate by NMR and CD spectroscopy. Mg2+ is required for activity.
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Volk R, Köster M, Pöting A, Hartmann L, Knöchel W. An antisense transcript from the Xenopus laevis bFGF gene coding for an evolutionarily conserved 24 kd protein. EMBO J 1989; 8:2983-8. [PMID: 2479540 PMCID: PMC401371 DOI: 10.1002/j.1460-2075.1989.tb08448.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Screening of a Xenopus laevis oocyte cDNA library with a rat basic fibroblast growth factor (bFGF) cDNA led to the isolation of a 1.35 kb sequence containing exon III of the bFGF gene. Reverse complementary listing of this sequence revealed a polyadenylated transcript with an open reading frame coding for an unknown protein of mol. wt 24,292 daltons. The coding part of bFGF exon III is located in this putative mRNA in opposite direction within the 3' untranslated region. By hybridization studies on transcription orientation with single-stranded probes it could be proven that this transcript actually represents an antisense transcript to part of the Xenopus bFGF gene. Sequence organization on corresponding genomic fragments revealed that it is processed from a larger precursor by splicing mechanisms. Sequence comparison with elongated transcripts from the bFGF gene in human hepatoma has shown that the gene coding for the antisense mRNA is evolutionarily conserved.
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Volk R. [Hypertension--a contribution on its therapy]. DIE MEDIZINISCHE WELT 1969; 50:2734-8. [PMID: 5371535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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43
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Volk R. [Clinical experiences in the treatment of bronchopulmonary diseases especially those caused by silicosis]. ZENTRALBLATT FUR ARBEITSMEDIZIN UND ARBEITSSCHUTZ 1967; 17:229-34. [PMID: 5589657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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44
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Allison ST, Volk R, Vitagliano GR. Dihydrostreptomycin in the treatment of pulmonary tuberculosis; with particular reference to its toxicity as compared with that of streptomycin. N Engl J Med 1949; 241:52-7. [PMID: 18153645 DOI: 10.1056/nejm194907142410203] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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45
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Asher L, Hueck, Huebschmann, Herzfeld, Oppenheimer, Koenigsfeld, Schübel, Holfelder, Halberstaedter, Holthusen, Vaternahm, Ballin, Weigert, Deusch, Valentin, Friedemann, Preuss, Fischer W, Sperling, Versé, Kraas, Hirschfeld H, Israel W, Volk R, Langer E, Finkenrath, Wohlwill F, Wiener O, Gaupp R. Einzelreferate und Buchbesprechungen. J Mol Med (Berl) 1930. [DOI: 10.1007/bf01745826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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46
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Volk R. LXXVII. Periarteriitis nodosa bei einem Lupus erythematodes chron. cum exacerbatione. Dermatology 1928. [DOI: 10.1159/000252349] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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47
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Jadassohn, Kissmeyer A, Volk R, Hecht H, Pick W. Buchanzeigen und Besprechungen. Arch Dermatol Res 1920. [DOI: 10.1007/bf01843364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Ullmann J, Zweig L, Roth A, Juliusberg F, Bandler V, Joseph M, Baer T, Volk R, Balban W, Schwab T, Lewandowsky F, Münchheimer F, Spitzer E, Braendle E, Schmitt A, Jungmann A. Syphilis. Symptomatologie. Arch Dermatol Res 1913. [DOI: 10.1007/bf01987156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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49
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Bandler V, Volk R, Baer T, Spitzer E, Balban W, Juliusberg F, Stern M, Münchheimer F, Schwab T, Krzysztalowicz F, Zweig L, Joseph M, Roth A, Ullmann J, Wallfisch H. Syphilis. Therapie. Arch Dermatol Res 1913. [DOI: 10.1007/bf01987157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Winkler M, Juliusberg F, Zweig L, Roth A, Braendle E, Joseph M, Volk R, Baer T, Weiler F, Callomon F, Boas H, Münchheimer F, Schmitt A, Balban W, Krzysztalowicz F. Syphilis. Therapie. Arch Dermatol Res 1913. [DOI: 10.1007/bf01825318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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