The present invention provides a polymeric agent which can incorporate a large amount of a drug, accumulate selectively in a tumor site, and has a molecular size of more than that for renal excretion. A metalloporphyrin derivative (such as zinc protoporphyrin) is associated with a styrene-maleic acid copolymer via non-covalent bond to give a SMA micelle complex, allowing provision of a polymeric pharmaceutical agent for treatment of cancer with a large amount of the drug incorporated. The SMA micelle complex can be produced by a method, wherein the metalloporphyrin derivative reacts with the styrene-maleic acid copolymer in the absence of a condensation agent under an alkaline condition, solubilized, adjusted to have a pH of 6-8, and subjected to a procedure for separating a polymer component to recover the micelle complex component for the polymeric pharmaceutical agent.

Hiroshi Maeda

Polymeric pharmaceutical agent for treatment of cancer and method for production of the same

The invention provides an aqueous liquid composition comprising a WT1 protein-derived cancer antigen peptide, wherein the peptide is stabilized. The aqueous liquid composition contains a peptide and an excipient, and has a pH of 3-6. The peptide has the amino acid sequence Arg-Met-Phe-Pro-Asn-Ala-Pro-Tyr-Leu (SEQ ID NO: 1), wherein optionally 1 to 3 amino acids are deleted, substituted and/or added, such that the peptide has a cytotoxic T cell-inducing ability. The excipient is (a) an alpha hydroxyl acid selected from glycolic acid, lactic acid, malic acid, tartaric acid, citric acid and pharmacologically acceptable salts thereof, (b) a dicarboxylic acid selected from malonic acid, succinic acid, glutaric acid, maleic acid and pharmacologically acceptable salts thereof, and/or (c) methionine.

Dainippon Sumitomo Pharma Co., Ltd.

Sumitomo Dainippon Pharma Co., Ltd.

Aqueous liquid composition

The present invention relates to polymeric antitumor agent which is formed in polymeric micelle complex by intermolecular bonding or mutual interaction between styrene maleic acid copolymer (SMA) and low molecule antitumor agent which is anthracyclins drug such as pirarubicin, doxorubicm, epirbicin, daunorbicin, acralbicin, or alkaloid antitumor agent such as cis-platinum, and taxol These polymeric antitumor agents may improve specificity to cancer cells so that it improves antitumor effect, while it may not be concentrated at normal organ or tissue, so that adverse effect may be diminished. These polymeric antitumor agents may be prepared by dissolving SMA and low molecule antitumor agent in aqueous solution, then in the presence of aqueous soluble carbodiimide, amino acids, or polyamine, adjusting pH to form micelle complex and recovering polymer fraction.

maleic acid/neoplasms

Polymeric pharmaceutical agent for treatment of cancer and method for production of the same

Aqueous liquid composition

Antitumor agent and process for producing the same

Cea mai completă bază de date cu plante medicinale susținută de știință