MSB-0254

By lysing cells, releasing RNA, and removing impurities such as proteins and DNA, high-purity RNA products are finally obtained. The commonly used traditional method is the guanidine isothiocyanate/phenol/chloroform method (Trizol), which is suitable for a variety of animal materials including animal tissues, microorganisms, cultured cells, etc., and most plant materials.

Ki-67 immunostaining measures the growth fraction of a cell population by detecting Ki-67, a nuclear antigen present in proliferating cells and absent in quiescent G0 cells. The readout is the percentage of Ki-67-positive nuclei among total counted cells, commonly called the Ki-67 labeling index or proliferation index.

Cell migration is a method that plays an important role in wound healing, cell differentiation, embryonic development, etc.

Periodic acid-Schiff staining detects tissue carbohydrates and mucosubstances by oxidizing carbohydrate glycol groups with periodic acid to generate aldehydes, which then react with Schiff reagent to produce a magenta reaction product; classic reports established the method for mucin and polysaccharide-containing structures in fixed tissue sections. PAS staining can demonstrate neutral mucins and goblet-cell mucin, but it is not specific for mucin because glycogen and other PAS-positive tissue components can also stain; diastase/PAS-D is used when glycogen removal is needed to distinguish glycogen-dependent PAS signal from non-glycogen PAS-positive mucosubstances.

Cell invasion is the ability of cells to migrate from one area to another via the extracellular matrix. Cell invasion is the response of normal and cancer cells to chemical and mechanical stimuli. Before migrating to a new region, the extracellular matrix is degraded by proteases within the cell. Cell invasion often occurs during wound repair, vascularization and inflammation, abnormal tissue invasion, and tumor cell metastasis.