Effect of Soluble Factors Released from Porcine Freeze-Dried Lung Tissue (FDLT) on Modulation of Cell Growth and EMT Signature in Non-Small Cell Lung Cancer (NSCLC)—A Preliminary In Vitro Study

Lung cancer remains one of the leading causes of cancer-related mortality worldwide, with therapeutic efficacy often hindered by the development of multidrug resistance. Consequently, alternative strategies to slow down tumor progression warrant rigorous investigation. Bioactive molecules derived from tissues and organs have shown potential therapeutic properties for several diseases. We investigated the biological role of soluble bioactive factors derived from lyophilized porcine freeze-dried lung tissue (FDLT), as they may contain tumor-suppressing components involved in the progression of non-small cell lung cancer (NSCLC). NSCLC H1975 and PC9 cell lines were treated with FDLT at concentrations of 0.25 mg/mL and 0.5 mg/mL. Cell cycle analysis and mitochondrial membrane potential (MMP) assays were performed to assess cell proliferation and cell death activation. In parallel, epithelial–mesenchymal transition (EMT) markers were detected by qRT-PCR. Our findings showed that FDLT treatment reduced the viability of H1975 and PC9 cells in a dose-dependent manner, along with significant suppression of cell proliferation and colony formation. Moreover, FDLT treatment altered the cell cycle phases and determined a concomitant reduction of cyclin D1 levels as well as induction of mitochondria depolarization by suppressing MMP. Finally, qRT-PCR revealed significant downregulation of EMT-related genes vimentin and N-cadherin, along with the EMT transcription factor Twist. These findings highlight soluble FDLT-derived biomolecules as a potential tool to design alternative treatment strategies for NSCLC.