Glycerin

The chemical materials used in this study include SPRC (also named ZYZ‐802, Shanghai), carbomer 940 (Macklin, China), sodium carboxymethyl cellulose (Macklin), glycerin (Macklin), sodium hydroxide (Macklin), Tween‐20 (Sigma, USA), Tween‐80 (Macklin), TRIzol reagent (Carlsbad, CA, USA), and phosphate‐buffered saline (PBS) tablets (Gaithersburg, MD, USA). Recombinant bovine bFGF was purchased from Essex Bio‐Technology (Zhuhai, China). Hydrogen peroxide solution was obtained from ANNJET (Shandong, China). Alcohol, n‐butanol, and xylene were purchased from SINOPHARM (Shanghai, China). Masson Tricolor Staining Kit, HE Staining Kit, BioDewax and clear solution, tris‐ethylene diamine tetraacetic acid antigen retrieval solution (Tris‐EDTA), pH = 9.0), bovine serum albumin (BSA), horseradish peroxidase (HRP) conjugated goat anti‐rabbit IgG (H+L), and DAB chromogenic kit were purchased from Servicebio (Wuhan, China). Total RNA was extracted with RNA Extraction Kit was purchased from Solarbio (Beijing, China). The HiFiScript gDNA Removal cDNA Synthesis Kit was obtained from CWBIO (Jiangsu, China). The PerfectStar Green qPCR SuperMix (+Dye I/+Dye II) was purchased from TRANS (Beijing, China).