@article{JocherRethwilmKapposetal.1990, author = {Jocher, R. and Rethwilm, Axel and Kappos, L. and ter Meulen, Volker}, title = {Search for retroviral sequences in peripheral blood mononuclear cells and brain tissue of multiple sclerosis patients}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-61462}, year = {1990}, abstract = {DNAs from peripheral blood mononuclear cells (PBMCs) of 21 patients with multiple sclerosis (MS), 1 patient with tropical spastic paraparesis (TSP) as well as DNAs from brain and spinal cord of 5 MS cases and 3 controls were examined for human T-cell lymphotropic virus (HTLV)-related sequences by polymerase chain reaction. The primers used were derived from the HTLV-1 gag, env and tax genes. Amplified products were separated on agarase gels, blotted onto nylon membranes and hybridized to specific radiolabelled oligonucleotides. The sensitivity of amplification and hybridization was one copy of target DNA in 10\8^5\) cellular genomes. None of the specimens was positive for HTLV-1 sequences except the TSP probe. These negative data are all the more significant because brain -material from MS patients was used in these studies. Our studies thus fail to support speculations that HTLV-I is involved in the aetiology of multiple sclerosis.}, subject = {Virologie}, language = {en} } @article{NetzerRethwilmMaureretal.1990, author = {Netzer, Kai O. and Rethwilm, Axel and Maurer, Bernd and ter Meulen, Volker}, title = {Identification of the major immunogenic structural proteins of human foamy virus}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-61477}, year = {1990}, abstract = {We have identified the major immunogenic structural proteins of the human foamy virus (HFV), a distinct member of the foamy virus subfamily of Retroviridae. Radiolabelied viral proteins were immunoprecipitated from HFV -infected cells by foamy virus antisera of human and non-human primate origin. Precipitated viral proteins were in the range of 31 K to 170K. Labelling of proteins with [\(^{14}\)C]glucosamine or with [\(^{35}\)S]methionine in the presence oftunicamycin, as well as endo-ß-N-acetylglycosaminidase Hand F treatment of [\(^{35}\)S]methionine-labelled proteins, revealed three viral glycoproteins of approximately 170K, 130K and 47K, most likely representing the env gene-encoded precursor, the surface glycoprotein and the transmembrane protein of HFV, respectively.}, subject = {Virologie}, language = {en} } @article{RethwilmMoriMaureretal.1990, author = {Rethwilm, Axel and Mori, Kazuyasu and Maurer, Bernd and ter Meulen, Volker}, title = {Transacting transcriptional activation of human spumaretrovirus LTR in infected cells}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-61488}, year = {1990}, abstract = {The long terminal repeat (LTR) of the human spumaretrovirus (HSRV) was examined with respect to its ability to function as transcriptional promotor in virus-infected and uninfected cells. Transient transfections using a plasmid in which the 3' L TR of HSRV was coupled to the bacterial chloramphenicol cetyltransferase (cat) gene revealed that the Ievei of HSRV LTR-directed cat gene expression was markedly increased in HSRV-infected cells compared to uninfected cells. Northern blot analysis of cat mRNA from transfected cultures suggests that transactivation of HSRVdirected gene expression occurs at the transcriptionallevel.}, subject = {Virologie}, language = {en} } @article{RethwilmBaunachNetzeretal.1990, author = {Rethwilm, Axel and Baunach, Gerald and Netzer, Kai O. and Maurer, Bernd and Borisch, Bettina and ter Meulen, V.olker}, title = {Infectious DNA of the human spumaretrovirus}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-61495}, year = {1990}, abstract = {An infectious molecular clone (pHSRV) of the human Spumaretrovirus (HSRV) was constructed using viral DNA and cDNA clones. The infectivity of pHSRV was proven by transfection of cell cultures and subsequent infection of susceptible cultures with cell free transfection derlved virus. pHSRV derived virus produced foamy virus typical cytopathic effects in susceptible cultures. lnfected cells could be stained specifically with foamy virus antisera by means of indirect immunofluorescence. Radiolmmunoprecipltatlon revealed the presence of characteristic HSRV structural proteins in pHSRV infected cultures. By cotransfection of pHSRV and an indicator plasmid it was found that pHSRV is able to transactivate the viral L TR. Viral transcripts were found to be approximately 200 bases Ionger in pHSRV infected cultures compared to wildtype infected cultures. This difference is most likely due to an Insertion of DNA of non-viral origin ln the U3 region of the 3'L TR of the infectious clone.}, subject = {Virologie}, language = {en} } @inproceedings{MoriRethwilmSchwinnetal.1990, author = {Mori, Kazuyasu and Rethwilm, Axel and Schwinn, Andreas and Horak, Ivan}, title = {Replication of human immunodeficiency virus type 1 in human t-cells expressing antisense RNA}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-86426}, year = {1990}, abstract = {No abstract available.}, subject = {HIV}, language = {en} } @inproceedings{RethwilmBaunachMorietal.1990, author = {Rethwilm, Axel and Baunach, Gerald and Mori, Kazuyasu and ter Meulen, Volker}, title = {Transactivation of HIV by human spumaretrovirus}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-86436}, year = {1990}, abstract = {To study the activation of HIV by human spumaretrovirus (HSRV) the long terminal repeats (LTRs) of HSRV, HIVl and HIV2 were examined with respect to their ability to function as transcriptional promoters in virus infected and uninfected cells. Transient transfections using plasmids in which the L TRs of the three viruses were coupled to the bacterial chloramphenicol acetyltransferase (CA T) gene revealed (i) the level of cat gene expression directed by the HSRV LTR was markedly increased in HSRV infected cells compared to uninfected cells, (ii) cat gene expression driven by the HIV1 LTR, but not by the HIV2 LTR could be enhanced upon HSRV infection, whereas (iii) neither in HIV1 nor in HIV2 infected cells an effect on HSRV LTR driven cat geneexpression was detected.}, subject = {HIV}, language = {en} }