摘要:
A strain of hepatitis E virus from Pakistan (SAR-55) implicated in an epidemic of enterically transmitted non-A, non-B hepatitis, now called hepatitis E, is disclosed. The invention relates to the expression of the whole structural region of SAR-55, designated open reading frame 2 (ORF-2), in a eukaryotic expression system. The expressed protein is capable of forming HEV virus-like particles which can serve as an antigen in diagnostic immunoassays and as an immunogen or vaccine to protect against infection by hepatitis E.
摘要:
The present invention discloses simian-human hepatitis A virus chimeric genomes which encode a hepatitis A virus having a chimeric 2C protein. The invention further discloses the use of these viruses or the nucleic acid sequence encoding them as vaccines.
摘要:
The present invention relates, in general, to a substantially pure preparation of the simian hepatitis A viral isolate AGM-27; a substantially pure preparation of the genomic DNA of simian hepatitis A viral isolate AGM-27; a pharmaceutical composition comprising the simian hepatitis A viral isolate AGM-27; a method of preventing hepatitis A in an animal; and a vaccine comprising the simian hepatitis A viral isolate AGM-27.
摘要:
The present invention relates, in general, to a substantially pure preparation of the simian hepatitis A viral isolate AGM-27; a substantially pure preparation of the genomic DNA of simian hepatitis A viral isolate AGM-27; a pharmaceutical composition comprising the simian hepatitis A viral isolate AGM-27; a method of preventing hepatitis A in an animal; and a vaccine comprising the simian hepatitis A viral isolate AGM-27.
摘要:
The nucleotide and deduced amino acid sequences of 51 cDNAs are disclosed where each cDNA encodes the envelope 1 gene of an isolate of hepatitis C virus (HCV). The invention relates to the oligonucleotides, peptides and recombinant envelope 1 proteins derived from these sequences and their use in diagnostic methods and vaccines.
摘要:
The nucleotide and deduced amino acid sequences of 51 cDNAs are disclosed where each cDNA encodes the envelope 1 gene of an isolate of hepatitis C virus (HCV). The invention relates to the oligonucleotides, peptides and recombinant envelope 1 proteins derived from these sequences and their use in diagnostic methods and vaccines.
摘要:
A full-length cDNA copy of an attenuated, cell culture-adapted hepatitis-A virus genome has been constructed. The HAV cDNA when inserted, without the oligo (dG) oligo (dC) tails, into an RNA transcription vector yielded a plasmid designated pHAV/7. Transfection of monkey kidney cells with pHAV/7 DNA yielded HAV. Transfection with RNA transcripts produced in vitro from pHAV/7 yielded about 10-fold more HAV than transfection with pHAV/7 DNA. HAV thus produced are useful as a vaccine.
摘要:
The nucleotide and deduced amino acid sequences of 51 cDNAs are disclosed where each cDNA encodes the envelope 1 gene of an isolate of hepatitis C virus (HCV). The invention relates to the oligonucleotides, peptides and recombinant envelope 1 proteins derived from these sequences and their use in diagnostic methods and vaccines.
摘要:
Human hepatitis A virus (HAV), taken directly from human clinical specimens, can be isolated and serially passaged in primary African green monkey kidney (AGMK) cell cultures. This strain induced antibody to HAV in inoculated chimpanzees and is useful for vaccine.
摘要:
Interferon introduced parenterally in a human host or stimulated by an inducer (PICLC) for a period of greater than 21 days results in a major decrease in all markers of infectivity, such as DNA polymerase, and such markers remain at a depressed level during the period of treatment. Where PICLC is utilized to induce interferon in the host, a serum level of 50 units per milliliter or higher is necessary for effective clinical treatment and 17 .times. 10.sup.4 - 6.0 .times. 10.sup.3 U/kg/day is an effective dose for exogenous interferon. Especially long-term treatment with exogenous interferon of greater than 21 days and up to 14 months results in clinical improvement for chronic hepatitis B virus (HBV) infection and this long-term treatment has resulted in sustained improvement even after cessation of treatment as well as resulting in a decrease in infectivity risk to others in close proximity to the infected human host. Such clinical improvement is marked by normalization of liver histology.
摘要翻译:干扰素肠胃外引入人宿主或由诱导物(PICLC)刺激大于21天的时间导致所有传染性标志物如DNA聚合酶的显着降低,并且这些标记在该期间保持在沮丧的水平 的治疗。 在PICLC用于诱导宿主中的干扰素的情况下,对于有效的临床治疗需要50单位/ ml或更高的血清水平,而对于外源性干扰素,17×104-6.0×10 3 U / kg /天是有效剂量。 特别是长期治疗21天以上14个月以外的外源性干扰素可导致慢性乙型肝炎病毒(HBV)感染的临床改善,长期治疗即使在治疗停止后也能持续改善, 导致受感染的人类宿主附近的其他人感染风险降低。 这种临床改善的特征是肝组织学正常化。