Novel pH-sensitive interpenetrated network polyspheres of polyacrylamide-g-locust bean gum and sodium alginate for intestinal targeting of ketoprofen: In vitro and in vivo evaluation

Rashmi Boppana, Sushil Yadaorao Raut, G. Krishna Mohan, Biswanath Sa, Srinivas Mutalik, Kakarla Raghava Reddy, Kusal K. Das, Mallanagouda S. Biradar, Raghavendra V. Kulkarni

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4 Citations (Scopus)


In this report, novel pH-sensitive interpenetrated network (IPN)polyspheres were developed utilizing polyacrylamide-g-locust bean gum (PAAm-g-LBG)in combination with sodium alginate (SA)to achieve intestinal targeted delivery of ketoprofen. PAAm-g-LBG was synthesized under microwave irradiation wherein ceric ammonium nitrate was used as reaction initiator and then conversion of PAAm-g-LBG as pH-sensitive copolymer was carried out by alkaline hydrolysis. The PAAm-g-LBG copolymer was characterized through 1 H-NMR, FTIR and elemental analysis. The IPN polyspheres exhibited pH-depended swelling or de-swelling with the alteration of surrounding pH. The in-vitro release of drug from IPN polyspheres was found to be higher (≈ 90%)in phosphate buffer of pH 7.4 in comparison with that in pH 1.2 buffer (10.6%). The in-vivo pharmacokinetic, anti-inflammatory screening and stomach histopathology studies performed on Wistar rats revealed pH sensitivity of IPN polyspheres where ketoprofen was successfully targeted to small intestine resulting in reduced side effects of ketoprofen like ulcer formation, erosion of gastric mucosa and hemorrhages.

Original languageEnglish
Pages (from-to)362-370
Number of pages9
JournalColloids and Surfaces B: Biointerfaces
Publication statusPublished - 01-08-2019


All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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