Virus immobilization on biomaterial scaffolds through biotin-avidin interaction for improving bone regeneration

Wei Wen Hu, Zhuo Wang, Paul H. Krebsbach

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10 Scopus citations


To spatially control therapeutic gene delivery for potential tissue engineering applications, a biotin-avidin interaction strategy was applied to immobilize viral vectors on biomaterial scaffolds. Both adenoviral vectors and gelatin sponges were biotinylated and avidin was applied to link them in a virus-biotin-avidin-biotin-material (VBABM) arrangement. The tethered viral particles were stably maintained within scaffolds and SEM images illustrated that viral particles were evenly distributed in three-dimensional (3D) gelatin sponges. An in vivo study demonstrated that transgene expression was restricted to the implant sites only and transduction efficiency was improved using this conjugation method. For an orthotopic bone regeneration model, adenovirus encoding BMP-2 (AdBMP2) was immobilized to gelatin sponges before implanting into critical-sized bone defects in rat calvaria. Compared to gelatin sponges with AdBMP2 loaded in a freely suspended form, the VBABM method enhanced gene transfer and bone regeneration was significantly improved. These results suggest that biotin-avidin immobilization of viral vectors to biomaterial scaffolds may be an effective strategy to facilitate tissue regeneration.

Original languageEnglish
Pages (from-to)E63-E72
JournalJournal of Tissue Engineering and Regenerative Medicine
Issue number2
StatePublished - 1 Feb 2016


  • Biomaterial scaffolds
  • Biotin-avidin
  • Bone regeneration
  • Critical-sized bone defect
  • Gene delivery
  • Gene therapy
  • Tissue engineering


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