Abstract: A monoclonal antibody used for specifically binding to CAR molecules, which is characterized in that the monoclonal antibody comprises a light chain and a heavy chain, the light chain comprises CDR regions having an amino acid sequence as shown in SEQ ID NO: 1-3, and the heavy chain comprises CDR regions having an amino acid sequence as shown in SEQ ID NO: 5-7. By using the described monoclonal antibody or a CAR-T cell detection kit, the steps of CAR-T cell detection are simple, detection time is short, and the detection results are stable. An anti-FMC63 ScFv antibody can reduce the cost of detecting universal anti-CD19 CAR-T cells.

Abstract: Provided are a monoclonal antibody against CD19 antibody and the application thereof. The monoclonal antibody which targets CD 19 antibody has high specificity and strong affinity. Also provided are a detection reagent with high sensitivity, good accuracy and good specificity for the detection of CAR-T cells and a detection method using the detection reagent, which may directly target an extracellular antigen-binding region on the CAR-T cell.

Abstract: The present invention provides a telomerase activity inhibiting polypeptide. The expression of the polypeptide in tumor cells can inhibit significantly tumor cell telomerase activity, tumor cell growth, and lead to the death of such cells. The present invention further provides a preparation method for the polypeptide and an application thereof in targeted treatments of tumors.

Abstract: A marker for the detection of liver cancer and application of the marker thereof. The application includes use of cytochrome p450 family 17 subfamily A polypeptide 1 (CYP17A1 protein) in the preparation of diagnostic reagents or kits for the detection of liver cancer kit. Studies have shown that CYP17A1 expression levels are higher in liver cancer tissues than in the adjacent healthy tissues, and the amount of CYP17A1 in sera of liver patients is significantly higher than that of healthy human population. Therefore, CYP17A1 can be used as a marker for the diagnosis of liver cancer (especially serological diagnosis).

Abstract: The present invention provides a telomerase activity inhibiting polypeptide. The expression of the polypeptide in tumor cells can inhibit significantly tumor cell telomerase activity, tumor cell growth, and lead to the death of such cells. The present invention further provides a preparation method for the polypeptide and an application thereof in targeted treatments of tumors.