Polymer Bulletin

, Volume 76, Issue 6, pp 2867–2885 | Cite as

The potential use of gentamicin sulfate-loaded poly(l-lactic acid)-sericin hybrid scaffolds for bone tissue engineering

  • Porntipa Pankongadisak
  • Narisara Jaikaew
  • Kitipong Kiti
  • Boontharika Chuenjitkuntaworn
  • Pitt Supaphol
  • Orawan SuwantongEmail author
Original Paper


Poly(l-lactic acid) (PLLA) scaffolds were prepared by a particulate leaching method using sodium chloride (NaCl) with the size of 300–425 µm as a particulate leaching. The PLLA/NaCl weight ratios were varied to be 1:8, 1:10, 1:12, and 1:15. The gentamicin sulfate (GS)-loaded PLLA-sericin hybrid scaffolds were prepared by immersion of the PLLA scaffolds in sericin solution containing GS at a concentration of 5 mg mL−1 and subsequently freeze-drying. From the results, the pore sizes of the neat and the GS-loaded PLLA-sericin hybrid scaffolds ranged between 290 and 346 µm. The pore interconnectivity of these scaffolds increased with an increase in the amount of NaCl. Both the neat and the GS-loaded PLLA-sericin hybrid scaffolds that had been fabricated at PLLA/NaCl weight ratio of 1:15 showed high interconnected porous structure. Both the water retention and the weight loss increased with increasing NaCl content and submersion time. The increase in the porous structure of the scaffolds with the increasing NaCl content resulted in an observed decrease in the compressive modulus. Moreover, the cumulative released amounts of GS increased with increasing the porous structure of the scaffolds. All the GS-loaded PLLA-sericin hybrid scaffolds showed high activity against the growth of both E. coli TISTR 780 and S. aureus TISTR 1466. Lastly, all the GS-loaded PLLA-sericin hybrid scaffolds were proven non-toxic to MC3T3-E1 cells, indicating their potential uses for bone tissue engineering.


PLLA scaffold Sericin Gentamicin sulfate Bone tissue engineering 



The authors would like to acknowledge the financial support from Mae Fah Luang University (MFU). Porntipa Pankongadisak gratefully acknowledges the Royal Golden Jubilee Ph.D. scholarship (PHD/0094/2558), Thailand Research Fund (TRF). Kitipong Kiti also acknowledges the Royal Golden Jubilee Ph.D. scholarship (PHD/0043/2559), Thailand Research Fund (TRF).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of ScienceMae Fah Luang UniversityChiang RaiThailand
  2. 2.Faculty of DentistryMahidol UniversityBangkokThailand
  3. 3.The Petroleum and Petrochemical College and The Center of Excellence on Petrochemical and Materials TechnologyChulalongkorn UniversityPathumwan, BangkokThailand
  4. 4.Center of Chemical Innovation for Sustainability (CIS)Mae Fah Luang UniversityChiang RaiThailand

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