Marina Biotech | Date: 2015-02-17
This invention provides single-stranded and multi-stranded compounds that are useful in various therapeutic modalities to regulate the expression of nucleic acid molecules in a cell. A range of compounds is provided, each containing one or more conformationally restricted nucleomonomers (CRN). In addition, compounds can contain one or more conformationally restricted nucleomonomers and one or more hydroxymethyl substituted nucleomonomers (unlocked nucleomonomers, UNA).
Marina Biotech | Date: 2016-02-22
The invention concerns lipid assemblies, liposomes having an outer surface comprising a mixture of anionic and cationic moieties; wherein at least a portion of the cationic moieties are imino moieties that are essentially charged under physiological conditions, and their use for serum resistant transfection of cells.
Marina Biotech | Date: 2015-03-14
Methods are described for the delivery of one or more small interfering RNAs (siRNAs) to a eukaryotic cell using a bacterium or BTP. Methods are also described for using this bacterium to regulate gene expression in eukaryotic cells using RNA interference, and methods for treating viral diseases and disorders. The bacterium or BTP includes one or more siRNAs or one or more DNA molecules encoding one or more siRNAs. Vectors are also described for use with the bacteria of the invention for causing RNA interference in eukaryotic cells.
Marina Biotech | Date: 2016-04-03
This disclosure provides a range of tyrosine amino acid lipid compounds and compositions useful for drug delivery, therapeutics, and the diagnosis and treatment of diseases and conditions. The amino acid lipid compounds and compositions can be used for delivery of various agents such as nucleic acid therapeutics to cells, tissues, organs, and subjects.
Marina Biotech | Date: 2015-12-15
Cholesterol moieties are linked to specific ends of double-stranded RNA, preferably a small, interfering (si)RNA or to a dsHybrid. The dsHybrid has one strand comprised of DNA and one strand comprised of RNA. Preferably the sense strand is the DNA strand and the antisense strand is the RNA strand of the dsHybrid. The present invention is based upon the discovery that a cholesterol moiety, if linked to a specific end or ends of the sense or antisense strands of a siRNA, can enhance the delivery and silencing efficiency of the siRNA directed against its target message, in comparison with a corresponding, non-conjugated siRNA. Conjugated siRNAs and dsHybrids of the invention are optionally formulated with, or coordinately administered with, a secondary delivery-enhancing agent, such as a delivery-enhancing peptide, to enhance intracellular delivery and uptake of the conjugated siRNAs or dsHybrid.
Marina Biotech | Date: 2015-08-05
Processes and compositions for liposomal delivery of therapeuticals prepared by contacting an aqueous solution of an active agent with a solution of liposome-forming components containing one or more DILA2 amino acid compounds or lipids in organic solvent to form an impinging stream. A protocol including flow rates, pH, and an incubation period are used to control formation of liposomal components for therapeutic applications. The impinging stream may be collected and incubated to prepare a liposomal formulation which encapsulates the active agent. The composition can be quenched with buffer and filtered by tangential flow and diafiltration and other means for finishing as a pharmaceutical composition. An efficiency for delivering a drug cargo is provided. Compositions can include a liposome containing one or more carrier particles, each carrier particle having an active agent and a peptide, wherein the ratio of the mass of the peptide plus the mass of the liposome to the mass of the active agent is less than about 15.
Marina Biotech | Date: 2015-05-28
The present disclosure provides meroduplex (nicked or gapped) ribonucleic acid molecules (mdRNA) that decreases or silences target gene expression. An mdRNA of this disclosure comprises at least three strands that combine to form at least two non-overlapping double-stranded regions separated by a nick or gap wherein one strand is complementary to a target gene RNA. In addition, the meroduplex may have one or more modifications or substitutions, such as nucleotide base, sugar, terminal cap structure, internucleotide linkage, or any combination of such modifications. Also provided are methods of decreasing expression of a target gene in a cell or in a subject to treat a disease related to altered expression of a target gene.
Marina Biotech | Date: 2015-11-16
Lipopeptide compounds having a central peptide and a lipophilic group attached to at least one terminus of the peptide, or to at least one amino acid residue of the peptide, and salts and uses thereof. The lipophilic group may be attached to the N-terminus, C-terminus or both termini of the peptide. The lipophilic group may be attached to at least one interal amino acid residue. The lipophilic group may be attached to either termini or both and at least one internal amino acid residue.
Marina Biotech | Date: 2015-10-06
Methods are described for the delivery of one or more small interfering RNAs (siRNAs) to a eukaryotic cell using a bacterium. Methods are also described for using this bacterium to regulate gene expression in eukaryotic cells using RNA interference, and methods for treating cancer of cell proliferative disorders. The bacterium includes one or more siRNAs or one or more DNA molecules encoding one or more siRNAs. Vectors are also described for use with the bacteria of the invention for causing RNA interference in eukaryotic cells.
Marina Biotech | Date: 2016-01-31
An amphoteric liposome composed of a mixture of lipids, said mixture comprising a cationic amphiphile, an anionic amphiphile and optionally one or more neutral amphiphiles, at least one of said cationic and anionic amphiphiles being chargeable and the respective amounts of said cationic and anionic amphiphiles being selected such there is a stoichiometric excess of positively charged cationic amphiphile at a first lower pH, a stoichiometric excess of negatively charged anionic amphiphile at a second higher pH and said mixture has an isoelectric point intermediate said first and second pHs; characterised in that said positively charged cationic and negatively charged anionic amphiphiles are adapted to form a lipid salt with one another at said isoelectric point. Also disclosed are methods of predicting the fusogenicity of an amphoteric liposome at a given pH, formulating an amphoteric liposome and loading an amphoteric liposome with a cargo moiety.