5 results about "Neoplastic growth" patented technology

The application discloses a LYTAG-Gem compound for enhancing the anti-tumor effect of gemcitabine and application thereof, relates to the technical field of biological medicine, and particularly relates to a gemcitabine (Gem) targeted delivery system based on a lysosome targeting chimera (LYTAC) and application thereof in enhancing the anti-tumor process. 2+ The system is assembled from heavy chain ferritin, Ni 2+ , NTA-PEG5000-DBCO and a targeting ligand TPP-1-N3 in a specific mass percentage, can efficiently load Gem and form a nano compound with a particle size of about 59-79 nm, the system targets tumor cells through heavy chain ferritin, and realizes site-specific release of Gem in cells by means of an endocytosis-lysosome pathway mediated by the LYTAC structure, in-vivo pharmacodynamic experiments show that the LYTAC-Gem compound can significantly inhibit the tumor growth of a KPC pancreatic cancer mouse model, molecular mechanism research further reveals that the LYTAC-Gem compound can down-regulate the expression of PD-L1 protein in tumor tissues, and it is indicated that the LYTAC-Gem compound has the potential to activate an anti-tumor immune response, and the application provides a novel targeted delivery strategy for overcoming the toxic side effects and tumor drug resistance of gemcitabine.

The application discloses application of an RFT1 inhibitor in preparation of a medicine for relieving and / or treating liver cancer, and relates to the technical field of biological medicines.It is found for the first time that the RFT1 gene can be used as a target point for treating hepatocellular carcinoma; on one hand, the RFT1 inhibitor can reduce the migration ability of liver cancer cells and inhibit the metastasis of liver cancer; on the other hand, the RFT1 inhibitor can effectively reduce the activity of the liver cancer cells and significantly inhibit the DNA synthesis of the liver cancer cells, inhibit the proliferation of the liver cancer cells, and restrain the growth of tumors.

This disclosure provides methods for treating tumors, reducing tumor severity, inhibiting tumor growth, or inducing tumor necrosis, wherein the methods include: selecting a patient with cancer (e.g., liver cancer, lung cancer, or head and neck cancer) in need of treatment and administering neoadjuvant therapy to the patient in a combination of a therapeutically effective amount of a programmed death 1 (PD-1) inhibitor (e.g., cimiprimab or its bioequivalent) and radiation therapy (e.g., SBRT) or an anti-LAG-3 antibody (e.g., fenpromab), followed by surgical resection and optionally administration of a programmed death 1 (PD-1) inhibitor (e.g., cimiprimab or its bioequivalent) as postoperative adjuvant therapy. In some embodiments, the cancer is liver cancer, such as hepatocellular carcinoma (HCC).

This invention discloses a photoactivated nanoparticle-based drug delivery material for immunoadjuvants, its preparation method, and its applications. The drug delivery material is constructed from photosensitizer monomers, crosslinking monomers, and immunoadjuvant prodrug monomers within a confined space of a nanoemulsion via a copper-free click polymerization reaction to form crosslinked polymer nanoparticles. The nanoparticle size is controllable, and the composition is precisely defined. Under physiological conditions, the drug delivery material exhibits good colloidal stability and high drug loading. Upon near-infrared light irradiation, the generated ROS can cleave the thioketone bonds, causing the nanoparticles to depolymerize and achieving photo-triggered, controllable release of the immunoadjuvant. Under photodynamic action, this drug delivery material efficiently generates reactive oxygen species to induce immunogenic cell death in tumor cells. Simultaneously, the released immunoadjuvant activates the TLR7 / 8 pathway, promotes dendritic cell maturation, and enhances the systemic anti-tumor immune response, thereby inhibiting the growth of tumors in situ and at distant sites, and reducing the risk of metastasis and recurrence.

The present invention relates to a drug delivery system with a micelle structure comprising a PEG2000-DSPE polymerized lipid and an APTEDB-PEG2000-DSPE polymer, and a preparation method thereof. The drug delivery system targets extra-domain B of fibronectin (EDB-FN), which is overexpressed in a brain tumor, and can pass through the blood-brain barrier (BBB) or the blood-brain tumor barrier (BBTB) to deliver a drug specifically to the brain tumor cells. In addition, the present invention can provide a pharmaceutical composition for diagnosing or treating a brain tumor, comprising the drug-loaded drug delivery system as an active ingredient. The composition can be accumulated inside the brain tumor and incorporated into the tumor cells to specifically inhibit tumor growth, and thus can be efficiently utilized for diagnosing or treating a brain tumor.