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Amersham Biosciences, Molecular Staging, Digene, NuGen Technologies, Solulink Bioscience, Clinical Micro Sensors


Amersham Biosciences received US Patent No. 6,686,161, “Methods and compositions for attachment of biomolecules to solid supports, hydrogels, and hydrogel arrays.” The patent covers solid supports (e.g., glass) and polymer hydrogels comprising reactive sites for the attachment of biomolecules, as well as biomolecules comprising one or more reactive sites for attachment to solid supports and polymer hydrogels. The invention provides novel compositions and methods for the preparation of biomolecules, solid supports, and polymer hydrogels comprising reactive sites.

Molecular Staging of New Haven, Conn., received US Patent No. 6,686,157, “Signal amplification with lollipop probes.” The patent covers a method for the detection of the amount and location of specific nucleic acid sequences, by use of a branched oligomer, referred to as a lollipop oligomer, which has three components that are joined at a common junction. The two arms at each end have sequences complementary to adjacent sequences in a target sequence. This allows the right and left arms to be ligated when the oligomer is hybridized to the target sequence, thus topologically linking the oligomer to the target sequence. The tail portion can then be detected at the location of the target sequence.

Digene of Gaithersburg, Md., received US Patent No. 6,686,151, “Immunological detection of RNA:DNA hybrids on microarrays.” The patent covers a hybridization method for the detection and measurement of biological molecules. A test sample containing the biological molecules of interest is hybridized with an unlabeled or, optionally, a detectably labeled complementary biomolecule to form a double-stranded hybrid immobilized to a solid phase. The immobilized hybrid may be detected with an entity which specifically recognizes an RNA:DNA hybrid, followed by analyses and quantification.

NuGen Technologies of Palo Alto, Calif., received US Patent No. 6,686,156, “Methods and compositions for transcription-based nucleic acid amplification.” The patent covers methods for isothermal exponential amplification of target polynucleotides. The methods employ two transcription modules, the first module providing linear amplification resulting in RNA transcripts, and a second module providing for further (generally cyclical) amplification resulting in more RNA transcripts. The RNA transcripts of the first transcription module are subjected to further amplification by creating an intermediate product comprising a double-stranded promoter region from which transcription can occur.

Solulink Bioscience of San Diego received US Patent No. 6,686,461, “Triphosphate oligonucleotide modification reagents and uses thereof.” The patent covers hydrazino, oxyamino, and carbonyl-based monomers and methods for incorporation them into oligonucleotides during enzymatic synthesis.

Clinical Micro Sensors of Pasadena, Calif., received US Patent No. 6,686,150, “Amplification of nucleic acids with electronic detection.” The invention describes compositions and methods for the detection of nucleic acids using a variety of amplification techniques, including both signal amplification and target amplification. Detection proceeds through the use of an electron transfer moiety that is associated with the nucleic acid to allow detection using an electrode.

The Scan

Purnell Choppin Dies

Purnell Choppin, a virologist who led the Howard Hughes Medical Institute, has died at 91, according to the Washington Post.

Effectiveness May Decline, Data From Israel Suggests

The New York Times reports that new Israeli data suggests a decline in Pfizer-BioNTech SARS-CoV-2 vaccine effectiveness against Delta variant infection, though protection against severe disease remains high.

To See Future Risk

Slate looks into the use of polygenic risk scores in embryo screening.

PLOS Papers on Methicillin-Resistant Staphylococcus, Bone Marrow Smear Sequencing, More

In PLOS this week: genomic analysis of methicillin-resistant Staphylococcus pseudintermedius, archived bone marrow sequencing, and more.