NIH-3T3 cell 3T3 cell 3T3 fibroblast BTO:0000944 BrendaTissueOBO NIH 3T3 cell NIH/3T3 cell NIH3T3 cell Very widely used mouse fibroblast cell line; 3T3 cells have been derived from different mouse strains and it is therefore important to define the particular cell line. NIH strain were from the National Institute of Health in the USA. embryonic fibroblast cell line