• Shahid UD Din Wani Dept. of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Rsearch, Mysuru
  • Gangadharappa H. V. Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Sri Shivarathreeshwara Nagara Mysuru, India 570 015
  • Ashish N. P. Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Sri Shivarathreeshwara Nagara Mysuru, India 570 015



Bombyx mori, Silk Fibroin, Telmisartan, Nanospheres, Drug delivery


Objective: The aim of the present work was to formulate silk fibroin (SF) nanospheres (NS’s) for drug delivery application. The current study was designed to advance the water solubility and bio-availability of telmisartan by nanoprecipitation method.

Methods: SF NS’s loaded with TS were prepared by nanoprecipitation method. The drug was dissolved in aqueous solution of SF by using acetone as a non-solvent. The prepared NS’s were then characterized by FTIR, X-ray diffraction and zeta potential, and were evaluated for its, surface morphology, %drug content, encapsulation efficiency and in vitro drug release.

Results: The evaluation results of SF NS’s loaded of TS showed 74.22±0.17 % entrapment efficiency, 35.21±0.02 % of drug loading, and-4.9 mV to-13.6 mV of zeta potential due to the proper bounding of TS with the β-sheets of SF, the particle size reported was within the size range of 160-186 nm having smooth surface and were spherical in shape. The SFNS’s pattern switched from random coil to β-sheet formation on treating with acetone. FTIR and DSC studies marked no such inter-molecular interactions between SF and drug molecules. The % cumulative in vitro drug release from SF NS’s exhibited quick burst release. The in vitro cumulative drug release of SF NS’s of TS it was found that about 74% of the drug was released within 8 h and about 96% of drug released at 24 hr. The rate of drug release increased with the increase in SF ratio.

Conclusion: It is believed that these SF NS’s will find potential applications in drug delivery release as drug carriers, especially poor water-soluble drugs. All these results proposed that SF NS’s are eventuality handy in various drug delivery systems.


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