Encapsulation of oligonucleotides in antibody-targeted liposomes (immunoliposomes) which bind to target cells permits intracellular delivery of the oligonucleotides. This approach circumvents problems of extracellular degradation by nucleases and poor membrane permeability which free phosphodiester oligonucleotides are subject to, but leaves unresolved the inefficiency of encapsulation of oligo...

Synthetic CpG oligonucleotides are promising components of immunomodulatory drugs for the treatment and prophylaxis infectious diseases, cancers, allergies. Phosphorothioate modification stabilizes these compounds, contributing to achievement a clinical effect, but at same time changes their properties. We used diffusible fluorescent dye dihydroethidium non-diffusible 6-carboxy-2′,7′dihydrochlo...

A modular approach has been developed for enzymatic ligation of peptides/proteins with oligonucleotides through the design tag phosphoramidites as adaptors, paving way towards streamlined production peptide/protein-oligonucleotide conjugates.

Oligonucleotides are indispensable tools in diagnostics, therapeutic applications and molecular biology. The low base pairing strength of thymine with adenine complicates their use. Ethynylpyridone C -nucleoside analogs thymidine that pair more strongly improved selectivity, sequences containing these show target affinity but routine use is hampered by diminished yields solid-phase syntheses th...

SARS-CoV-2 In their Communication on page 21662, Xinjing Tang et al. report the efficient inhibition of using chimeric antisense oligonucleotides through RNase L activation.

Amplification and overexpression of the erbB-2 oncogene is an unfavourable prognostic marker in human breast cancer and occurs in approximately 25% of breast carcinomas. We used erbB-2 antisense oligonucleotides to inhibit the proliferation of human breast cancer cell lines. erbB-2 antisense oligonucleotides (20 JLM) inhibited the growth and DNA synthesis of breast cancer cell lines with an amp...

Synthetic oligonucleotides are used to regulate gene expression through different mechanisms. Chemical modifications of the backbone of the nucleic acid and/or of the 2' moiety of the ribose can increase nuclease stability and/or binding affinity of oligonucleotides to target molecules. Here we report that transfection of 2'-F-modified phosphorothioate oligonucleotides into cells can reduce the...