PMID- 9139857 OWN - NLM STAT- MEDLINE DCOM- 19970523 LR - 20190708 IS - 0020-7136 (Print) IS - 0020-7136 (Linking) VI - 71 IP - 2 DP - 1997 Apr 10 TI - Expression and immunogenicity in rats of recombinant adenovirus 5 DNA plasmids and vaccinia virus containing the HTLV-I env gene. PG - 300-7 AB - The complete human T-cell leukemia virus type I (HTLV-I) env gene was inserted into an expression cassette containing the adenovirus 5 major late promoter (Ad5-MLP). Recombinant Ad5-HTLV-I-env was obtained by homologous recombination in 293 cells simultaneously transfected by the expression cassette and the genomic DNA of Ad5. In vitro expression of the HTLV-I-env gene in the recombinant vector was detected by immunofluorescence and Western blotting. Functional expression of HTLV-I-env was confirmed by syncitium formation specifically in HeLa cells infected with Ad5-HTLV-I-env. Two immunization regimens against HTLV-I were tested in WKY and Fischer F-344 rats. The first involved WKY rats primed with Ad5-HTLV-I-env or naked DNA plasmids containing the HTLV-I-env gene and boosted with Ad5 containing the HTLV-I-env gp46 gene or with baculovirus-derived recombinant gp46. No antibody against HTLV-I was detected, while HTLV-I-specific cytotoxic T lymphocytes were recovered from all immunized groups but not from controls. The second approach involved Fischer F-344 rats primed and boosted with recombinant vaccinia virus containing the HTLV-I-env gene. Such rats developed antibodies against the HTLV-I env gp21 and gp46 (non-neutralizing). After challenge with human HTLV-I-producing cells (MT-2), both immunization regimens were found to induce partial protection. FAU - Kazanji, M AU - Kazanji M AD - Unite d'Epidemiologie des Virus Oncogenes, Institut Pasteur, Paris, France. FAU - Bomford, R AU - Bomford R FAU - Bessereau, J L AU - Bessereau JL FAU - Schulz, T AU - Schulz T FAU - de The, G AU - de The G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (DNA Primers) RN - 0 (DNA, Viral) RN - 0 (HTLV-I Antibodies) RN - 0 (Viral Envelope Proteins) SB - IM MH - Adenoviridae/*genetics MH - Animals MH - Blotting, Western MH - Cytotoxicity, Immunologic MH - DNA Primers/chemistry MH - DNA, Viral/*genetics MH - Fluorescent Antibody Technique, Indirect MH - *Gene Expression Regulation, Viral/genetics/immunology MH - *Genes, env/genetics/immunology MH - HTLV-I Antibodies/analysis MH - HeLa Cells/virology MH - Human T-lymphotropic virus 1/*genetics/*immunology MH - Humans MH - Plasmids/genetics MH - Rats MH - Rats, Inbred F344 MH - Rats, Inbred WKY MH - T-Lymphocytes, Cytotoxic/immunology MH - Vaccinia virus/*genetics MH - Viral Envelope Proteins/immunology EDAT- 1997/04/10 00:00 MHDA- 2000/06/20 09:00 CRDT- 1997/04/10 00:00 PHST- 1997/04/10 00:00 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1997/04/10 00:00 [entrez] AID - 10.1002/(SICI)1097-0215(19970410)71:2<300::AID-IJC27>3.0.CO;2-J [pii] AID - 10.1002/(sici)1097-0215(19970410)71:2<300::aid-ijc27>3.0.co;2-j [doi] PST - ppublish SO - Int J Cancer. 1997 Apr 10;71(2):300-7. doi: 10.1002/(sici)1097-0215(19970410)71:2<300::aid-ijc27>3.0.co;2-j.