Biocompatible tumor micro-environment responsive CS-g-PNIPAAm co-polymeric nanoparticles for targeted Oxaliplatin delivery

  • Archana S. Patil
  • Anand P. Gadad
  • Ravindra D. Hiremath
  • Shrinivas D. Joshi


The objective of the research study was to develop and characterize a biodegradable, thermo and pH dual responsive Oxaliplatin-loaded chitosan-graft-poly-N-isopropylacrylamide (CS-g-PNIPAAm) co-polymeric nanoparticles as a tumor-targeting drug delivery system. CS-g-PNIPAAm co-polymers were synthesized, characterized and optimized its thermo and pH responsive properties for tumor microenvironment conditions. Optimized co-polymer could be efficiently loaded with Oxaliplatin in nanoparticle form, evaluated for their morphology (TEM), particle size, zeta potential, loading efficiency and drug content. In vitro drug release study at tumor microenvironment and physiological pH and temperature conditions. The in vitro drug release was optimal at above lower critical solution temperature (LCST) and tumor microenvironment pH when compared to physiological pH & temperature. MTT assay and fluorescence microscopic study showed that drug release and cell uptake was significantly enhanced in tumor microenvironment. In conclusion, the obtained nanoparticles appeared to be of great promise in tumor targeted drug delivery of oxaliplatin.


Oxaliplatin Thermo and pH responsive nanoparticles Chitosan-graft-poly-N-isopropylacrylamide co-polymer Tumor targeting 



Authors are thankful to the KLE University, Belagavi for provinding grant to perform this research work. Authors extend their regards to Dr. Prabhakar Kore Basic Science Research Centre, KLE University Belagavi for providing their amenities to carry out this work. The authors are also thankful to Central Institute of Fisheries Technology, Cochin, India for providing chitosan as gift sample.


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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Archana S. Patil
    • 1
  • Anand P. Gadad
    • 1
  • Ravindra D. Hiremath
    • 2
  • Shrinivas D. Joshi
    • 3
  1. 1.Department of Pharmaceutics, KLE Academy of Higher Education and ResearchKLE College of PharmacyBelagaviIndia
  2. 2.Department of Pharmaceutical chemistry, K.L.E’s College of PharmacyNippaniIndia
  3. 3.Department of Pharmaceutical chemistryS.E.T’s College of PharmacyDharwadIndia

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