Hyaluronic acid promotes the osteogenesis of BMP-2 in an absorbable collagen sponge

H. Huang, J. Feng, D. Wismeijer, G. Wu, E.B. Hunziker

Research output: Contribution to JournalArticleAcademicpeer-review


(1) Background: We tested the hypothesis that hyaluronic acid (HA) can significantly promote the osteogenic potential of BMP-2/ACS (absorbable collagen sponge), an efficacious product to heal large oral bone defects, thereby allowing its use at lower dosages and, thus, reducing its side-effects due to the unphysiologically-high doses of BMP-2; (2) Methods: In a subcutaneous bone induction model in rats, we first sorted out the optimal HA-polymer size and concentration with micro CT. Thereafter, we histomorphometrically quantified the effect of HA on new bone formation, total construct volume, and densities of blood vessels and macrophages in ACS with 5, 10, and 20 μg of BMP-2; (3) Results: The screening experiments revealed that the 100 µg/mL HA polymer of 48 kDa molecular weight could yield the highest new bone formation. Eighteen days post-surgery, HA could significantly enhance the total volume of newly-formed bone by approximately 100%, and also the total construct volume in the 10 μg BMP-2 group. HA could also significantly enhance the numerical area density of blood vessels in 5 μg BMP-2 and 10 μg BMP-2 groups. HA did not influence the numerical density of macrophages; and (4) Conclusions: An optimal combined administration of HA could significantly promote osteogenic and angiogenic activity of BMP-2/ACS, thus potentially minimizing its potential side-effects.
Original languageEnglish
Article number339
Number of pages13
Issue number8
Publication statusPublished - 2017


This study was supported by funds of China Scholarship Council, National Natural Science Foundation of China (81400475, 81470724, and 81600844), Zhejiang Provincial Natural Science Foundation of China (LY14H140002 and Y17H140023) and Science Technology Department of Zhejiang Province (2017C33168).

FundersFunder number
National Natural Science Foundation of China81600844, 81470724, 81400475
China Scholarship Council
Natural Science Foundation of Zhejiang ProvinceLY14H140002, Y17H140023
Science and Technology Department of Zhejiang Province2017C33168


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