Proteome of Personalized Tissue-Engineered Veins

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Proteomics

Background:

• Vascular diseases represent a significant global health burden, with autologous vein transplantation as the current standard treatment.
• Existing alternatives to autologous veins have limitations such as poor patency and infection risk.
• Tissue-engineered vascular grafts using patient-specific cells and extracellular matrix (ECM) scaffolds show promise.

Purpose of the Study:

• To compare the proteomes of human and pig tissue-engineered veins.
• To investigate the impact of decellularization and reconditioning on vein scaffolds.
• To assess the potential of these engineered veins for vascular disease treatment.

Main Methods:

• Tandem mass tag (TMT) labeling coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used for proteomic analysis.
• Decellularized (DC) and reconditioned (RC) vein scaffolds from humans and pigs were analyzed.
• Functional enrichment analysis was performed to identify biological pathways and processes.

Main Results:

• High proteomic similarity was observed between human and pig DC and RC veins, including ECM texture.
• Functional analysis revealed conserved signaling pathways and immune system response processes.
• Proteins associated with immune response were identified, but the overall response suggested wound healing initiation rather than immunogenicity.

Conclusions:

• Human and pig tissue-engineered veins exhibit significant proteomic similarities, supporting their use as models.
• The reconditioning process in STEEN solution appears to promote wound healing pathways.
• This research identifies potential biomarkers for predicting successful vascular graft transplantation.