The application discloses a sequential anti-tumor strategy based on improvement of
tumor microenvironment (TME) combined with CAR T and application thereof, and belongs to the technical field of biological
medicine, which simultaneously improves tumor
fibrosis and acid microenvironment by applying tumor-related
fibroblast (CAF) targeting drugs and
proton pump inhibitors, and sequentially injects CAR T
combined therapy for
solid tumors, wherein the CAF targeting drugs are selected from
tretinoin,
calcipotriol,
losartan and minnelide, the
proton pump inhibitors are selected from
lansoprazole,
omeprazole,
pantoprazole,
rabeprazole and
esomeprazole, and the CAR T
receptor or ligand is selected from
mesothelin,
protein tyrosine kinase 7, NKG2D, CD47, B7-H3, MUC1 and HER2; the sequential administration strategy first destroys the dense
physical barrier of the
tumor microenvironment, improves the acidity of the
tumor site, ensures the infiltration, survival and proliferation of CAR T at the
tumor site, and then targets and inhibits the growth of
solid tumors, especially high-
malignancy triple-negative
breast cancer, by using the specificity of CAR T.