@article{SeherNickelMuelleretal.2011, author = {Seher, Axel and Nickel, Joachim and Mueller, Thomas D. and Kneitz, Susanne and Gebhardt, Susanne and Meyer ter Vehn, Tobias and Schlunck, Guenther and Sebald, Walter}, title = {Gene expression profiling of connective tissue growth factor (CTGF) stimulated primary human tenon fibroblasts reveals an inflammatory and wound healing response in vitro}, series = {Molecular Vision}, volume = {17}, journal = {Molecular Vision}, number = {08. Okt}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-140189}, pages = {53-62}, year = {2011}, abstract = {Purpose: The biologic relevance of human connective tissue growth factor (hCTGF) for primary human tenon fibroblasts (HTFs) was investigated by RNA expression profiling using affymetrix (TM) oligonucleotide array technology to identify genes that are regulated by hCTGF. Methods: Recombinant hCTGF was expressed in HEK293T cells and purified by affinity and gel chromatography. Specificity and biologic activity of hCTGF was confirmed by biosensor interaction analysis and proliferation assays. For RNA expression profiling HTFs were stimulated with hCTGF for 48h and analyzed using affymetrix (TM) oligonucleotide array technology. Results were validated by real time RT-PCR. Results: hCTGF induces various groups of genes responsible for a wound healing and inflammatory response in HTFs. A new subset of CTGF inducible inflammatory genes was discovered (e.g., chemokine [C-X-C motif] ligand 1 [CXCL1], chemokine [C-X-C motif] ligand 6 [CXCL6], interleukin 6 [IL6], and interleukin 8 [IL8]). We also identified genes that can transmit the known biologic functions initiated by CTGF such as proliferation and extracellular matrix remodelling. Of special interest is a group of genes, e.g., osteoglycin (OGN) and osteomodulin (OMD), which are known to play a key role in osteoblast biology. Conclusions: This study specifies the important role of hCTGF for primary tenon fibroblast function. The RNA expression profile yields new insights into the relevance of hCTGF in influencing biologic processes like wound healing, inflammation, proliferation, and extracellular matrix remodelling in vitro via transcriptional regulation of specific genes. The results suggest that CTGF potentially acts as a modulating factor in inflammatory and wound healing response in fibroblasts of the human eye.}, language = {en} } @article{SebaldWachterTzagoloff1979, author = {Sebald, Walter and Wachter, E. and Tzagoloff, A.}, title = {Identification of amino acid substitutions in the dicyclohexylcarbodiimide-binding subunit of the mitochondrial ATPase complex from oligomycin-resistant mutants of Saccharomyces cerevisiae}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62770}, year = {1979}, abstract = {No abstract available}, subject = {Biochemie}, language = {en} } @article{HoppeSchairerSebald1980, author = {Hoppe, J. and Schairer, HU and Sebald, Walter}, title = {Identification of amino-acid substitutions in the proteolipid subunit of the ATP synthase from dicyclohexylcarbodiimide-resistant mutants of Escherichia coli}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-47374}, year = {1980}, abstract = {The amino acid sequence of the proteolipid subunit of the A TP synthase was analyzed in six mutant strains from Escherichia coli K 12, selected for their increased resistance towards the inhibitor N,N'-dicyclohexylcarbodiimide. All six inhibitor-resistant mutants were found to be altered at the same position of the proteolipid, namely at the isoleucine at residue 28. Two substitutions could be identified. In type I this residue was substituted by a valine resulting in a moderate decrease in sensitivity to dicyclohexylcarbodiimide. Type II contained a threonine residue at this position. Here a strong resistance was observed. These two amino acid substitutions did not influence functional properties of the ATPase complex. ATPase as well as A TP-dependent proton-translocating activities of mutant membranes were indistinguishable from the wild type. At elevated concentrations, dicyclohexylcarbodiimide still bound specifically to the aspartic acid at residue 61 of the mutant proteolipid as in the wild type, and thereby inhibited the activity of the ATPase complex. It is suggested that the residue 28 substituted in the resistant mutants interacts with dicyclohexylcarbodiimide during the reactions leading to the covalent attachment of the inhibitor to the aspartic acid at residue 61. This could indicate that these two residues are in close vicinity and would thus provide a first hint on the functional conformation of the proteolipid. Its polypeptide chain would have to fold back to bring together these two residues separated by a segment of 32 residues.}, subject = {Biochemie}, language = {en} } @article{JacklSebald1975, author = {Jackl, G. and Sebald, Walter}, title = {Identification of two products of mitochondrial protein synthesis associated with mitochondrial adenosine triphosphatase from Neurospora crassa}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62812}, year = {1975}, abstract = {Soluble mitochondrial ATPase (F1) isolated from Neurospora crassa is resolved by dodecylsulfate- gel electrophoresis into five polypeptide bands with apparent molecular weights of 59000, 55000, 36000, 15000 and 12000. At least nine further polypeptides remain associated with ATPase after disintegration of mitochondria with Triton X-100 as shown by the analysis of an immunoprecipitate obtained with antiserum to F 1 A TPase. Two of the associated polypeptides with apparent molecular weights of 19000 and 11000 are translated on mitochondrial ribosomes, as demonstrated by incorporation in vivo of radioactive leueine in the presence of specific inhibitors of mitochondrial (chloramphenicol) and extramitochondrial ( cycloheximide) protein synthesis. The appearance of mitochondrial translation products in the immunoprecipitated A TPase complex is inhibited by' cycloheximide. The same applies for some of the extramitochondrial translation products in the presence of chloramphenicol. This suggests that both types of polypeptides are necessary for the assembly of the A TPase complex.}, subject = {Biochemie}, language = {en} } @article{JacklSebald1974, author = {Jackl, G. and Sebald, Walter}, title = {Identification of two products of mitochondrial protein synthesis associated with oligomycin-sensitive ATPase from Neurospora crassa}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-82093}, year = {1974}, abstract = {no abstract available}, subject = {Physiologische Chemie}, language = {en} } @article{KueblerReutherKirchneretal.1994, author = {K{\"u}bler, N. and Reuther, J. and Kirchner, T. and Pfaff, M. and M{\"u}ller-Hermelink, H. K. and Albert, R. and Sebald, Walter}, title = {IgG monoclonal antibodies that inhibit osteoinductivity of human bone matrix-derived proteins (hBMP/NCP)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62388}, year = {1994}, abstract = {Monoclonal hBMP/NCP (human bone morphogenetic protein anrl associaterl noncollagenous proteins) antiborlies of the lgG class were prorlucerl. In vitro, 12 of 19 hBMP/NCP antiborlies showerl functional inhibition of hBMP/ NCP-induced chondroneogenesis in a neonatal muscle tissue assay. Inducing factors were characterized by their inhibiting antibodies with immunoblotting. Several peptide factors seem to be involved in the cascade of inducerl chondro- and osteogenesis.}, subject = {Biochemie}, language = {en} } @article{NeupertSebaldSchwabetal.1969, author = {Neupert, W. and Sebald, Walter and Schwab, A. J. and Massinger, P. and B{\"u}cher, T.}, title = {Incorporation in vivo of \(^{14}\)C-labelled amino acids into the proteins of mitochondrial ribosomes from Neurospora crassa sensitive to cycloheximide and insensitive to Chloramphenicol}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62884}, year = {1969}, abstract = {Radioactive amino acids were incorporated in vivo into N eurospora crassa cells, and the mitochondrial ribosomes were isolated. The incorporation of radioactivity into the proteins of these ribosomes was inhibited by cycloheximide, but not by chloramphenicol. It is therefore concluded that these proteins are synthesized on the cycloheximide sensitive and chloramphenicol insensitive cytoplasmic ribosomes.}, subject = {Biochemie}, language = {en} } @article{SebaldHofstoetterHackeretal.1969, author = {Sebald, Walter and Hofst{\"o}tter, T. and Hacker, D. and B{\"u}cher, T.}, title = {Incorporation of amino acids into mitochondrial protein of the flight muscle of Locusta migratoria in vitro and in vivo in the presence of cycloheximide}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62919}, year = {1969}, abstract = {No abstract available}, subject = {Biochemie}, language = {en} } @article{SebaldWeissJackl1972, author = {Sebald, Walter and Weiss, H. and Jackl, G.}, title = {Inhibition of the assembly of cytochrome oxidase in Neurospora crassa by chloramphenicol}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62852}, year = {1972}, abstract = {Cytochrome oxidasewas prepared from Neurospora crassa by chromatography on oleyl polymethacrylic acid resin and separated into seven polypeptides by polyacrylamide gel electrophoresis in the presence of sodium dodecylsulfate. Incorporation oflabelled amino acids into the single polypeptideswas investigated after a pulse labelling in the absence and presence of chloramphenicol, and afterwashing out the inhibitor. Chloramphenicol (4 mg/ml) inhibited amino acid incorporation into all polypeptides 90-95\%• while labeHing of the whole membrane protein was inhibited only 30\%• Mter washing out the inhibitor and further growth of the cells. the four smaller polypeptides were highly labelled, whereas the other polypeptides showed only a. small increase in radioactivity. It is concluded that the four small-sized polypeptides of cytochrome oxidase are synthesized but not integrated into the functional enzyme under the action of chloramphenicol.}, subject = {Biochemie}, language = {en} } @article{LehrnbecherMerzSebaldetal.1991, author = {Lehrnbecher, T. and Merz, H. and Sebald, Walter and Poot, M.}, title = {Interleukin 4 drives phytohemagglutinin-activated T cells through several cell cycles: no synergism between interleukin 2 and interleukin 4}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-62491}, year = {1991}, abstract = {Cell kinetic studies of T cells stimulated with the interleukin 2 (11-2), D-4, or both lymphokines were performed with conventional [3H] thymidine incorporation and with the bivariate BrdU/Hoechst technique. 11-2 and 11-4 are able to drive phytohemagglutininactivated T cells through more than one cell cycle. Neither synergistic nor inhibitory efl'ect on T -cell proliferationwas seen for the stimulation with both 11-2 and 11-4 as compared with the effect ofll-2 alone. The quantitative data ofthe cell cycle distribution ofphytohemagglutininactivated T cells suggestthat the population ofll-4-responsive cells is at least an overlapping population, if not a real subset of the ·population of the 11-2-responsive cells.}, subject = {Biochemie}, language = {en} }