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Background  Transforming growth factor-betas (TGF-βs), including beta2 (TGF-β2), constitute a superfamily of multifunctional cytokines with important implications in morphogenesis, cell differentiation and tissue remodeling. TGF-β2 is thought to play important roles in multiple developmental processes and neuron survival. However, before we carried out these investigations, a TGF-β2 gene down-regulated transgenic animal model was needed. In the present study, expressional silencing TGF-β2 was achieved by select predesigning interference short hairpin RNAs (shRNAs) targeting mouse TGF-β2 genes.    Results  Four homozygous transgenic offspring were generated by genetic manipulation and the protein expressions of TGF-β2 were detected in different tissues of these mice. The transgenic mice were designated as Founder 66, Founder 16, Founder 53 and Founder 41. The rates of TGF-β2 down-expression in different transgenic mice were evaluated. The present study showed that different TGF-β2 expressions were detected in multiple tissues and protein levels of TGF-β2 decreased at different rates relative to that of wild type mice. The expressions of TGF-β2 proteins in transgenic mice (Founder 66) reduced most by 52%.    Conclusions  The present study generated transgenic mice with TGF-β2 down-regulated, which established mice model for systemic exploring the possible roles of TGF-β2  in vivo  in different pathology conditions.

Newly developed TGF-β2 knock down transgenic mouse lines express TGF-β2 differently and its distribution in multiple tissues varies