Abstract: Provided herein are compositions, methods, kits and systems for treating cells, tissues and subjects to alter age-related biology (e.g., to study or to treat age-related diseases and conditions). In particular, provided herein are compositions, methods, and uses for inhibition or modification of sialic acid or its cognate receptor to restore phagocytosis in aged cells.

Abstract: Methods and reagents for multiplex detection of antibodies are disclosed. In particular, the invention relates to multiplex detection of antibodies using antigen-DNA and antibody-binding agent-DNA conjugates carrying DNA barcodes for identifying and quantitating disease-relevant antibody isotypes, such as those involved in allergic responses, autoimmune diseases, infections, and inflammation.

Abstract: Provided are bifunctional molecules that include a first moiety that specifically binds a cell surface molecule or extracellular molecule, and a second moiety that specifically binds a lysosomal targeting molecule. The bifunctional molecules find use, e.g., for targeted degradation of cell surface and extracellular molecules (e.g., proteins) via the endosomal/lysosomal pathway. Also provided are compositions and kits that include the bifunctional molecules, as well as methods of using the bifunctional molecules. Methods of making bifunctional molecules are also provided.

Abstract: Methods and reagents for multiplex detection of antibodies are disclosed. In particular, the invention relates to multiplex detection of antibodies using antigen-DNA and antibody-binding agent-DNA conjugates carrying DNA barcodes for identifying and quantitating disease-relevant antibody isotypes, such as those involved in allergic responses, autoimmune diseases, infections, and inflammation.

Abstract: Provided are bifunctional molecules that include a first moiety that specifically binds a cell surface molecule or extracellular molecule, and a second moiety that specifically binds a lysosomal targeting molecule. The bifunctional molecules find use, e.g., for targeted degradation of cell surface and extracellular molecules (e.g., proteins) via the endosomal/lysosomal pathway. Also provided are compositions and kits that include the bifunctional molecules, as well as methods of using the bifunctional molecules. Methods of making bifunctional molecules are also provided.

Abstract: Provided are bifunctional molecules that include a first moiety that specifically binds a cell surface molecule or extracellular molecule, and a second moiety that specifically binds a lysosomal targeting molecule. The bifunctional molecules find use, e.g., for targeted degradation of cell surface and extracellular molecules (e.g., proteins) via the endosomal/lysosomal pathway. Also provided are compositions and kits that include the bifunctional molecules, as well as methods of using the bifunctional molecules. Methods of making bifunctional molecules are also provided.

Abstract: Methods are provided for detecting antigen binding agents in samples. Aspects of the methods include detection of the aggregation of antigen binding agents with polynucleotide-bound antigens by sensitive proximity-based association of the anti-gen-bound polynucleotides. Aspects of the methods also include methods for the detection of such proximity-based association through nucleic acid amplification. In addition, compositions, e.g., reagents, kits, and devices, useful in practicing various embodiments of the methods are provided.

Abstract: Methods are provided for detecting antigen binding agents in samples. Aspects of the methods include detection of the aggregation of antigen binding agents with polynucleotide-bound antigens by sensitive proximity-based association of the antigen-bound polynucleotides. Aspects of the methods also include methods for the detection of such proximity-based association through nucleic acid amplification. In addition, compositions, e.g., reagents, kits, and devices, useful in practicing various embodiments of the methods are provided.

Abstract: Methods, chips and systems are provided for the ex vivo delivery of payloads into cells using an aptamer-based approach. Methods are provided for delivering a payload to a cell comprising providing a nanoneedle and a polynucleotide, wherein a first end of the polynucleotide comprises an aptamer capable of binding a molecule endogenous to a cell, wherein the first end of the polynucleotide is conjugated to the nanoneedle, and wherein a second end of the polynucleotide comprises an oligonucleotide capable of hybridizing with a payload; contacting the payload with the polynucleotide, wherein the payload contains a nucleotide sequence that is complementary to the oligonucleotide sequence; and inserting the nanoneedle into a cell, wherein upon insertion of the nanoneedle into the cell the payload is released from the polynucleotide.

Abstract: Provided herein are compositions, methods, kits and systems for treating cells, tissues and subjects to alter age-related biology (e.g., to study or to treat age-related diseases and conditions). In particular, provided herein are compositions, methods, and uses for inhibition or modification of sialic acid or its cognate receptor to restore phagocytosis in aged cells.

Abstract: Methods and reagents for multiplex detection of antibodies are disclosed. In particular, the invention relates to multiplex detection of antibodies using antigen-DNA and antibody-binding agent-DNA conjugates carrying DNA barcodes for identifying and quantitating disease-relevant antibody isotypes, such as those involved in allergic responses, autoimmune diseases, infections, and inflammation.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: Methods are provided for detecting antigen binding agents in samples. Aspects of the methods include detection of the aggregation of antigen binding agents with polynucleotide-bound antigens by sensitive proximity-based association of the antigen-bound polynucleotides. Aspects of the methods also include methods for the detection of such proximity-based association through nucleic acid amplification. In addition, compositions, e.g., reagents, kits, and devices, useful in practicing various embodiments of the methods are provided.

Abstract: Aldehyde- and ketone-functionalized proteins are promising new substrates for the development of chemically modified biotherapeutics and protein-based materials. Their reactive carbonyl groups are typically conjugated with a-effect nucleophiles, such as substituted hydrazines and alkoxyamines, to generate hydrazones and oximes, respectively. However, the resulting C?N linkages are susceptible to hydrolysis under physiologically relevant conditions, which limits their utility in biological systems. Here we introduce a Pictet-Spengler ligation that is based on the classic Pictet-Spengler reaction of aldehydes and tryptamine nucleophiles. The ligation exploits the bioorthogonal reaction of aldehydes and alkoxyamines to form an intermediate oxyiminium ion; this intermediate undergoes intramolecular C—C bond formation with an indole nucleophile to form an oxacarboline product that is hydrolytically stable.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: The invention features compositions and methods for site-specific modification of proteins by incorporation of an aldehyde tag. Enzymatic modification at a sulfatase motif of the aldehyde tag through action of a formylglycine generating enzyme (FGE) generates a formylglycine (FGly) residue. The aldehyde moiety of FGly residue can be exploited as a chemical handle for site-specific attachment of a moiety of interest to a polypeptide.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: The present invention provides cycloparaphenylene compounds, their macrocyclic precursors, and methods for making the compounds. The cycloparaphenylene compounds can be used to prepare armchair carbon nanotubes.

Abstract: Aldehyde- and ketone-functionalized proteins are promising new substrates for the development of chemically modified biotherapeutics and protein-based materials. Their reactive carbonyl groups are typically conjugated with a-effect nucleophiles, such as substituted hydrazines and alkoxyamines, to generate hydrazones and oximes, respectively. However, the resulting C?N linkages are susceptible to hydrolysis under physiologically relevant conditions, which limits their utility in biological systems. Here we introduce a Pictet-Spengler ligation that is based on the classic Pictet-Spengler reaction of aldehydes and tryptamine nucleophiles. The ligation exploits the bioorthogonal reaction of aldehydes and alkoxyamines to form an intermediate oxyiminium ion; this intermediate undergoes intramolecular C—C bond formation with an indole nucleophile to form an oxacarboline product that is hydrolytically stable.

Abstract: The present invention provides cycloparaphenylene compounds, their macrocyclic precursors, and methods for making the compounds. The cycloparaphenylene compounds can be used to prepare armchair carbon nanotubes.