Abstract: Disclosed are target for screening anti-tumor drug, application use thereof and screening method therefor. Disclosed are a target for screening a drug for treating and/or preventing tumors, the target for screening the drug for treating and/or preventing tumors comprise selenoprotein; and a target for screening a drug for preventing tumor metastasis, the target for screening the drug for preventing the tumor metastasis comprising selenoprotein. Also disclosed is a method for screening a drug for treating and/or preventing tumors or a drug for preventing tumor metastasis, the method comprising: interacting a candidate drug with the selenoprotein; and screening the drug for treating and/or preventing tumors or the drug for preventing tumor metastasis according to an affinity between the candidate drug and the selenoprotein; and the candidate drug with a high affinity with the selenoprotein is taken as a candidate primarily screened drug.

Abstract: The present disclosure provides a spiramycin-producing strain, a carrimycin-producing strain, construction method therefor, use thereof and method for increasing the product yield thereof. The provided spiramycin-producing strain has an inactivated gene Lrp (?lrp-SP); and the strain has a preservation number of CGMCC No.16056. The provided carrimycin-producing strain has an inactivated gene Lrp (?lrp-BT); and the strain has a preservation number of CGMCC No.16055. By inactivating the gene Lrp, the yields of spiramycin and carrimycin are increased; and particularly the yield and proportion of a major component of the carrimycin, that is, 4?-O-isovalerylspiramycin III are significantly increased.

Abstract: A medicament for preventing, alleviating and/or treating fibrosis comprises one of Carrimycin, Isovalerylspiramycin I, Isovalerylspiramycin II and Isovalerylspiramycin III; or a combination of two or three of Isovalerylspiramycin I, Isovalerylspiramycin II and Isovalerylspiramycin III. A combination product for preventing, alleviating and/or treating fibrosis comprises a first drug, an effective component of the first drug comprises one of Carrimycin, Isovalerylspiramycin I, Isovalerylspiramycin II and Isovalerylspiramycin III; or a combination of two or three of Isovalerylspiramycin I, Isovalerylspiramycin II and Isovalerylspiramycin III. It also relates to use of the medicine and combination product in preventing, alleviating and/or treating fibrosis.

Abstract: A pharmaceutical composition containing any one or more of 4?-O-isolvalerylspiramycin I, II and III counters tumorigenesis and reduces or prevents metastasis by inhibiting selenoprotein H to trigger genomic instability and cell-cycle arrest in cancer cells.

Abstract: A pharmaceutical composition containing any one or more of 4?-O-isolvalerylspiramycin I, II and III counters tumorigenesis and reduces or prevents metastasis by inhibiting selenoprotein H to trigger genomic instability and cell-cycle arrest in cancer cells.

Abstract: The present disclosure provides use of carrimycin and pharmaceutically acceptable salts thereof for the preparation of a medicament for the treatment of tumors. The carrimycin and the pharmaceutically acceptable salts thereof have good curative effects on breast cancer, liver cancer, lung cancer, renal cancer, brain tumor, cervical cancer, prostate cancer, pancreatic cancer, esophageal cancer, gastric adenocarcinoma, colon cancer, lymphoma or leukemia and other tumors, and especially have obvious inhibitory effects on the growth of human breast cancer cells MCF-7 and MDA-MB-231, human hepatoma cells HepG2, human non-small cell lung cancer cells A549, human large cell lung cancer cells H460 and H1299, human renal clear cell adenocarcinoma cell 786-O, human renal cell adenocarcinoma cell 769-P, and human glioma cell U251.

Abstract: Disclosed are a medicament comprising isovaleryl spiramycin I, II and/or III, and use of isovaleryl spiramycin I, II and/or III in manufacturing medicament for treating and/or preventing tumor and the medicament.

Abstract: The present disclosure provides use of carrimycin and pharmaceutically acceptable salts thereof for the preparation of a medicament for the treatment of tumors. The carrimycin and the pharmaceutically acceptable salts thereof have good curative effects on breast cancer, liver cancer, lung cancer, renal cancer, brain tumor, cervical cancer, prostate cancer, pancreatic cancer, esophageal cancer, gastric adenocarcinoma, colon cancer, lymphoma or leukemia and other tumors, and especially have obvious inhibitory effects on the growth of human breast cancer cells MCF-7 and MDA-MB-231, human hepatoma cells HepG2, human non-small cell lung cancer cells A549, human large cell lung cancer cells H460 and H1299, human renal clear cell adenocarcinoma cell 786-O, human renal cell adenocarcinoma cell 769-P, and human glioma cell U251.