NIH 3T3 cells are a line of mouse fibroblast cells that are widely used in biological research. They were derived from mouse embryonic tissue and are known for their ability to grow rapidly and adhere to surfaces. These cells are often used in studies related to cell biology, cancer research, and drug development. The NIH 3T3 cell line is particularly valuable for experiments involving gene expression and cellular responses to various stimuli. Researchers utilize these cells to investigate processes such as cell proliferation, differentiation, and transformation, making them a fundamental tool in the field of biomedical research.