Research Interests

Therapeutic delivery system, Gene therapy, Immunotherapy

Selected Publications

  • Protein cytoplasmic delivery using polyampholytes nanoparticles and freeze concentration
    S. Ahmed, F. Hayashi, T. Nagashima, K. Matsumura
    Biomaterials, 35, 6508-6518, (2014)
  • Novel Concentration-based freezing method for efficient protein delivery
    S. Ahmed, K. Matsumura
    Cryobiol Cryotechnol., 62, 143-147, (2016)
  • Enhanced protein internalization and efficient endosomal escape using polyampholyte-modified liposomes and freeze c...
    S. Ahmed, S. Fujita, K. Matsumura
    Nanoscale 8, 15888-15901, (2016)
  • A freeze concentration and polyampholytes- modified liposomes-based antigen delivery system for effective immunothe...
    S. Ahmed, S. Fujita , K. Matsumura
    Adv. Heathc Mater. 6 (14), 1-12, (2017)
  • Freezing assisted gene delivery combined with polyampholytes nanocarriers
    S. Ahmed, T. Hirabayashi Nakaji, T. Watanabe, K. Matsumura
    ACS Biomater Sci. Eng. 3(8), 1677-1689, (2017)
  • Comparative analysis of the cellular entry of polystyrene and gold nanoparticles using the freeze concentration met...
    S. Ahmed, K. Okuma, K. Matsumura
    Biomater. Sci. 6, 1791-1799, (2018)
  • ​Combination of hydrophobic polyampholytes and non-freezing cold temperature promotes internalization of gold nanop...
    S. Ahmed, K. Matsumura, T. Hamada
    Langmuir, 35 (5),17401748, (2019)

Education Profile

  • ​Ph. D., Chemistry, Japan Advanced Institute of Science and Technology, Japan, 2017

Professional Profile

  • ​2019: Postdoctoral fellow, KAUST, Thuwal, Saudi Arabia.
  • 2018-2019: Postdoctoral Researcher, University of Toyama, Japan
  • 2017-2018: Postdoctoral Researcher, Japan Advanced Institute of Science and Technology, Japan


  • ​Outstanding Performance Award, Commencement Ceremony, Japan 
  • Advanced Institute of Science and Technology, Japan
  • Best Poster Award, 9th International Conference on Fiber and Polymer Biotechnology, Osaka, Japan