Biochemical phenotypes of mouse testes transplanted with or without SSCs that were transfected with miRNA mimic control, or miRNA-20 mimic, or miRNA-106a mimic, or miRNA-20 inhibitor, or miRNA-106a inhibitor. (A-B) Immunohistochemistry showed that GFRα1 (A) and PCNA (B) expression was increased in mouse testes transplanted with miRNA-20 or miRNA-106a mimics. Scale bars = 10 μm (A, B).