The invention discloses a PD-L1 immunohistochemical
quality control product and a preparation method thereof, and relates to the technical field of
biology. The PD-L1 immunohistochemical
quality control product comprises
cell slices prepared from a plurality of different types of
tumor cells, the
cell section comprises a positive
quality control product and a negative quality control product which are marked by different colors. In the invention, different
tumor cells are creatively adopted as raw materials of the quality control product, the quality control product can be efficiently and quickly prepared, and the limitation of the source of a human
tissue sample is overcome; a BSA sealing
buffer solution is used for soaking the section, so that long-term stable production of a quality control product can be realized, the
dyeing background is reduced, and the
dyeing effect is enhanced; besides, by preparing the
cell slices with various proportions and different
staining intensities, the quality control on the
staining of the
antibody can be ensured, and guidance can also be provided for accurate interpretation, namely comprehensive and accurate quality control and interpretation guidance are provided for the
staining of the
antibody, false negative and false positive are effectively eliminated, and the method has great
clinical significance.