34 results about "C21 steroid" patented technology

The invention belongs to the field of medicines or health care products, and in particular relates to the use of C. citronella C21 steroids in the preparation of IDO inhibitors. The present invention finds through the research that salivaside C, salivaside D, salivaside O, salivaside P, salivaside Q, salivaside R, salivaside S, salivaside M and salivaside N The inhibitory activity to intracellular IDO is better than that of the positive control drug 1-methyltryptophan (1-MT) to the inhibitory activity of intracellular IDO, has significant IDO inhibitory activity, and can be used for the treatment of cancer, albino Alzheimer's disease, autoimmune disease, ankylosing spondylitis, bacterial infection, cataracts, mood disorder, depression, or anxiety.

Belonging to the field of natural pharmaceutical chemistry, the invention discloses a C21 steroid Asclepiasterol, a preparation method and application thereof in preparation of a tumor multidrug resistance reversal agent. The structural formula of C21 steroid Asclepiasterol is shown as the specification. The Asclepiasterol involved in the invention has low cytotoxicity, but can significantly increase the accumulation degree of antitumor drugs in drug resistant cells, can enhance the effect of antitumor drugs in inducing drug resistant cell apoptosis, and can be applied in combination with antitumor drugs to significantly inhibit the formation rate of drug resistant tumor cell colonies and obviously decline the expression level of P-gp in two drug resistant cell lines without lowering drug resistant gene expression, thus suggesting that Asclepiasterol probably affects P-gp expression at the level of transcription and translation and has a unique mechanism of action. Therefore, compared with the existing tumor multidrug resistance reversal agents, the C21 steroid Asclepiasterol provided by the invention has high reversal activity and low toxicity, and is in accordance with the high efficiency and low toxicity characteristics of antitumor drugs.

The invention provides a Xu Changqing C21 steroid transformation product and its application in the preparation of a multidrug resistance reversal agent for tumor cells. The weight percentage of C21 steroid aglycone in the transformation product is greater than or equal to 90%, which can reverse the multidrug resistance of human gastric cancer. Drug-resistant cells, multidrug-resistant cells of human colon cancer, and multidrug-resistant cells of human lung cancer are resistant to commonly used clinical drugs paclitaxel, doxorubicin, 5-fluorouracil, and cisplatin, and also provide preparation of Xu Changqing's C21 steroid transformation product The method and the preparation method are simple and convenient. The Xu Changqing C21 steroid transformation product of the present invention is used in combination with antineoplastic drugs in clinic to improve the curative effect of chemotherapy and has broad application prospects.

The invention belongs to the field of medicines or health products and particularly relates to Periploca forrestii C21 steroides in preparation of IDO (indoleamine-2,3-dioxygenase) inhibitors. Researches herein discover that both periplocoside L and periplocoside H have better intracellular IDO inhibitory activity than a positive control 1-MT (1-methyl-tryptophan), have significant IDO inhibitoryactivity, and are suitable for treating cancers, Alzheimer's disease, autoimmune diseases, ankylosing spondylitis, bacterial infections, cataract, mood disorders, and depression or anxiety.

The present invention relates to a pharmaceutical composition for the treatment, prevention and / or treatment of neurodegenerative diseases. On the one hand, its active ingredient C21 steroidal saponin can significantly reduce the production of β-amyloid in N2a-APP695 cells and increase excessive Aβ amyloid. Protein clearance rate; on the other hand, it promotes the proliferation of neuronal cells, and has a protective effect on neurotransmitters such as glutamate-induced neuronal cytotoxicity caused by the excessive accumulation of Aβ amyloid, thereby comprehensively playing a role in the treatment of neurodegenerative diseases. effect. Therefore, it has a good application prospect in the preparation of Aβ amyloid formation inhibitors and neuroprotective agents, and drugs for preventing or treating neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, Huntington's disease and the like.

The invention belongs to the technical field of medicines, and relates to the preparation of C21 steroid compounds in Tengguanteng and its application in the field of preventing and treating osteoporosis. The present invention discloses a C21 steroid compound of formulas (I) and (II) and salts thereof, R1-R5 as described in the description and claims. The compound of the present invention has good effect of preventing and treating osteoporosis, and can be combined with a pharmaceutically acceptable carrier to prepare clinically acceptable medicine for treating osteoporosis.