摘要:
A method is described whereby new cDNA or RNA sequences can be introduced into or substituted for cDNA in any chosen position without specific sequence requirements using the polymerase chain reaction (PCR). The method entails the use of primers which are complementary to the 3' and 5' ends of the desired sequence to be inserted as well as to the 3' and 5' ends of the chosen site of insertion in the acceptor molecule. The desired sequence is amplified by PCR such that single stranded fragments are produced. The single stranded fragment of the desired sequence is then annealed to a single stranded acceptor molecule at the site of insertion and extended to produce a double stranded molecule. The double stranded molecule is then separated into two strands which are identical except that one of the strands contains the desired sequence inserted at the chosen site. A second double stranded molecule is then generated.
摘要:
Provided are an isolated peptide having the amino acid sequence DLMGYIPAV (SEQ ID NO: 1), an isolated HCV core polypeptide comprising an L→A substitution at amino acid position 139, an isolated HCV core polypeptide having the amino acid sequence of SEQ ID NO: 2, and a fragment of an HCV core polypeptide having fewer amino acids than the entire HCV core polypeptide and comprising the amino acid sequence of SEQ ID NO:1. Also provided are nucleic acids which encode the peptides and polypeptides of this invention, vectors comprising the nucleic acids of this invention and cells comprising the vectors and nucleic acids of this invention. Further provided are methods of producing an immune response in a subject and/or treating or preventing HCV infection in a subject, comprising administering to the subject, or to a cell of the subject, any of the compositions of this invention.
摘要翻译:提供了具有氨基酸序列DLMGYIPAV(SEQ ID NO:1)的分离的肽,在氨基酸位置139包含L> A取代的分离的HCV核心多肽,具有SEQ ID NO:1的氨基酸序列的分离的HCV核心多肽 NO:2和HCV核心多肽的片段,其具有比整个HCV核心多肽更少的氨基酸并且包含SEQ ID NO:1的氨基酸序列。 还提供了编码本发明的肽和多肽的核酸,包含本发明的核酸的载体和包含本发明的载体和核酸的细胞。 还提供了在受试者中产生免疫应答和/或治疗或预防受试者的HCV感染的方法,包括向受试者或受试者的细胞施用本发明的任何组合物。
摘要:
Methods for producing HAV cDNA, products thereof, and uses thereof, are described. HAV cDNA is produced, for example, by reverse transcribing HAV RNA and subsequently inserting the HAV cDNA into bacterial plasmids by genetic-engineering techniques. Transformed bacteria are then cloned and cultured to produce replicated chimetic plasmids containing the HAV cDNA. Such HAV cDNA is useful in assaying for the presence of HAV and in the production of HAV antigen and in the production of antibodies against HAV.
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:
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:
The present invention provides 1) an isolated peptide having the amino acid sequence DLMGYIPAV, (SEQ ID NO: 1); 2) an isolated HCV core polypeptide comprising an L→A substitution at amino acid position 139; 3) an isolated HCV core polypeptide having the amino acid sequence of SEQ ID NO: 2; and 4) a fragment of an HCV core polypeptide having fewer amino acids than the entire HCV core polypeptide and comprising the amino acid sequence SEQ ID NO: 1. Also provided are nucleic acids which encode the peptides and polypeptides of this invention, vectors comprising the nucleic acids of this invention and cells comprising the vectors and nucleic acids of this invention. The present invention further provides methods of producing an immune response in a subject and/or treating or preventing HCV infection in a subject, comprising administering to the subject, or to a cell of the subject, any of the compositions of this invention.
摘要翻译:本发明提供1)具有氨基酸序列DLMGYIPAV(SEQ ID NO:1)的分离肽; 2)在氨基酸位置139包含L> A取代的分离的HCV核心多肽; 3)具有SEQ ID NO:2的氨基酸序列的分离的HCV核心多肽; 和4)具有比整个HCV核心多肽更少的氨基酸并且包含氨基酸序列SEQ ID NO:1的HCV核心多肽的片段。还提供编码本发明的肽和多肽的核酸,其包含 本发明的核酸和包含本发明的载体和核酸的细胞。 本发明进一步提供了在受试者中产生免疫应答和/或治疗或预防受试者的HCV感染的方法,其包括对受试者或受试者的细胞施用任何本发明的组合物。
摘要:
The cytotoxic T cell response to the protein encoded by the NS5 region of hepatitis C virus was determined using 28 peptides from NS5 which were selected by an amphipathicity algorithm as candidates for T cell epitopes. In BALB/c mice, a single relatively conserved epitope represented by a 16-residue synthetic peptide was presented by D.sup.d class I major histocompatibility complex (MHC) molecules to conventional CD4.sup.- CD8.sup.+ CTL. An exemplary peptide, which represents amino acid residues 2422-2437 of the polyprotein of the Chiron HCV1 isolate, had the amino acid sequence MSYSWTGALVTPCAAE [SEQ ID NO: 1]. A CTL line specific for this peptide recognized the two known natural variants of this NS5 sequence, each with conservative substitutions. Thus, CTL can recognize the product of the HCV NS5 gene, the probable RNA polymerase, in association with class I MHC molecules on model target cells and may recognize the same epitope on hepatocytes or any other cells infected with the virus.
摘要:
A method of inactivating a lipid virus contained in a dry protein carrier by contacting said virus-containing protein carrier for an abbreviated period of time at from 4.degree.-40.degree. C. with a composition including a halohydrocarbon treating agent and water dissolved in said treating agent. Preferred lipid viruses are Hepatitis B virus (HBV) and non-A, non-B Hepatitis (NANBH) virus.
摘要:
A method of inactivating a lipid virus in a protein carrier selected from the group consisting of Hepatitis B virus (HBV) and non-A, non-B hepatitis (NANBH) by contacting said virus for an extended period of time and ambient temperature with a halohydrocarbon treating agent preferably chloroform in an amount of 5% v/v to 50% v/v.