alexa Use of recombinant calpain-2 siRNA adenovirus to assess calpain-2 modulation of lung endothelial cell migration and proliferation.
Biomedical Sciences

Biomedical Sciences

Journal of Biomolecular Research & Therapeutics

Author(s): Qiu K, Su Y, Block ER

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Abstract In this study, we developed an adenoviral vector harboring calpain-2 siRNA expression unit in which sense and anti-sense strands composing the siRNA duplex were connected by a loop and transcribed into a siRNA in porcine pulmonary artery endothelial cells (PAEC). We screened one efficient adenoviral vector Ad/si-m187 and found that Ad/si-m187 successfully exerted a gene knockdown effect on calpain-2 mRNA transcription and protein expression levels. The protein content of calpain-2 was reduced by 30\%-80\% in PAEC infected with Ad/si-m187 in comparison to a control adenoviral vector Ad/si-luc. The mRNA levels of calpain-2 were measured by real-time PCR and were decreased by 60\%-100\% and in a dose dependent manner. In correspondence to silencing calpain-2 gene expression, calpain-2 activity was decreased significantly. We further evaluated the role of calpain-2 in endothelial cell migration and proliferation. PAEC infected with Ad/si-m187 displayed impaired migration and cell proliferation in comparison to cells infected with control adenoviral vector (Ad/si-luc). These results indicate that adenoviral vector harboring calpain-2 siRNA expression unit is a valuable tool to study the biology of calpains and that calpain-2 plays an important role in lung endothelial cell migration and proliferation. This article was published in Mol Cell Biochem and referenced in Journal of Biomolecular Research & Therapeutics

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