摘要:
A method for diagnosing an HIV-2 (LAV-II) infection and a kit containing reagents for the same is disclosed. These re-agents include cDNA probes which are capable of hybridizing to at least a portion of the genome of HIV-2. In one embodiment, the DNA probes are capable of hybridizing to the entire genome of HIV-2. These reagents also include polypeptides encoded by some of these DNA sequences.
摘要:
The present invention provides, among other things, a polypeptide that binds with the gp120 envelope protein of HIV, in particular HIV-1, under physiological conditions, a nucleic acid that encodes such a polypeptide and can be expressed in a cell, a composition comprising such a polypeptide or nucleic acid or an antibody and a carrier therefor, a composition comprising a solid support matrix to which is attached an above-described polypeptide or an anti-antibody to a specified polypeptide sequence, a method of making an antibody to gp120, and a method of removing HIV from a bodily fluid.
摘要:
This invention is directed toward the isolation of a novel retrovirus, the human immune deficiency virus type 2 (HIV-2, previously named LAV-2), from patients with acquired immune deficiency syndrome (AIDS) originating from West Africa. This virus is related to HIV-1, the causative agent of AIDS, both by its morphology and by its tropism and in vitro cytopathic effect on CD4 (T4) positive cell lines and lymphocytes. However, preliminary hybridization experiments indicated that there are substantiated differences between the sequences of the two genomes. Furthermore, the proteins of HIV-1 and HIV-2 have different sizes and their serological cross-reactivity is restricted to the major core protein, as the envelope glycoproteins of HIV-2 are not immunoprecipitated by HIV-1 positive sera. Overlapping molecular clones were obtained and the complete nucleotide sequence of the gag and env genes was ascertained. An antigenic envelope polypeptide having the following amino acid sequence was identified: NH2-VTAIEKYLEDQARLNSWGCAFRQVC-COOH. The peptide is useful for the detection of HIV-2-specific immunological reagents.
摘要:
The present invention is directed toward a novel human retrovirus isolated from West African AIDS patients. This virus was originally designated lymphadenopathy associated virus (LAV) type II and subsequently renamed the human immunodeficiency virus type 2, or HIV-2. This virus is genotypically and phenotypically distinct from both human immunodeficiency virus type 1 (HIV-1) and the simian immunodeficiency virus (SIV). A recombinant &lgr; phage library was prepared by subjecting HIV-2-infected CEM genomic DNA to digestion with Sau3AI. The library was screened with an HIV-2-specific cDNA probe and molecular clones of the virus were obtained. Restriction maps and the nucleotide sequences of these clones were ascertained. These nucleic acids should prove useful, inter alia, as probes for the detection of HIV-2 in biological samples and for the expression of HIV-2 gene products.
摘要:
This invention relates to methods and apparati for performing electrochemical analyses. The invention provides an electrochemical apparatus for performing potentio metric analyses for detecting specific binding between a first member of a biological binding pair immobilized on an electrode and a second member of a biological binding pair that is electrochemically labeled, in the presence of an electrochemical mediator. Methods for using the apparatus of the invention for performing binding and competition binding assays are provided. The invention also provides methods for performing high throughput screening assays for detecting inhibition of specific binding between the members of the biological binding pair for use in drug development, biochemical analysis and protein purification assays.
摘要:
This invention is directed toward polypeptides derived from novel lentiviruses. A novel lentivirus, designated the human immunodeficiency virus type 2, was isolated from West African patients with acquired immune deficiency syndrome (AIDS). Several isolates were obtained and designated HIV-2.sub.ROD, HIV-2.sub.IRMO, and HIV-2.sub.EHO. A recombinant lambda phage library was constructed from HIV-2.sub.ROD -infected CEM genomic DNA. Overlapping molecular clones were obtained and the nucleotide sequence of the complete 9.5-kilobase (kb) HIV-2.sub.ROD genome ascertained. The genetic organization of HIV-2 is analogous to that of other retroviruses and consists of the 5'LTR-gag-pol-central region-env-nef-3'LTR. The central region also encodes for the regulatory proteins Tat and Rev, as well as the ancillary proteins Vif, Vpr, and Vpx. The proteins encoded by this proviral clone will provide novel immunologic, biochemic, and diagnostic reagents useful for the detection of HIV-2.
摘要:
A method for diagnosing an HIV-2 (LAV-II) infection and a kit containing reagents for the same is disclosed. These reagents include cDNA probes which are capable of hybridizing to at least a portion of the genome of HIV-2. In the embodiment, the DNA probes are capable of hybridizing to the entire genome of HIV-2. These reagents also include polypeptides encoded by some of these DNA sequences.
摘要:
The present invention relates to a process for the immunochemical determination of one or more analytes in a sample using an immobilized specific receptor R1, which exhibits interactive bioaffinity with the analyte, and a specific receptor R2, which likewise exhibits interactive bioaffinity with the analyte and which as a rule is labeled. In the novel process, a receptor R3, which possesses one or more than one specific binding site for the analyte, is added and the resulting immune complexes are entirely or partially dissociated, after which they are reassociated and subsequently detected. According to a further embodiment, a receptor R4 is employed in addition to the receptor R3, which receptor R4 possesses an affinity towards R3 and is immobilized on the solid phase, with the resulting immune complexes being entirely or partially dissociated, after which they are reassociated and subsequently detected.
摘要:
A method for diagnosing an HIV-2 (LAV-II) infection and a kit containing reagents for the same is disclosed. These reagents include cDNA probes which are capable of hybridizing to at least a portion of the genome of HIV-2. In one embodiment, the DNA probes are capable of hybridizing to the entire genome of HIV-2. These reagents also include polypeptides encoded by some of these DNA sequences.
摘要:
The present invention relates to a novel method to identify compounds that inhibit proteolytic cleavage by dibasic amino acid processing endoproteases that includes contacting a yeast strain with a putative inhibitory compound under conditions in which, in the absence of the compound, the yeast strain can cleave a precursor protein having a dibasic amino acid processing site and determining if the putative inhibitory compound inhibits cleavage of the precursor protein. The present invention includes a method to identify compounds capable of inhibiting infectious agents, such as viruses, that depend upon dibasic amino acid processing endoprotease cleavage for propagation. The present invention also includes assay kits based on such a method.