AAPS PharmSciTech

, Volume 19, Issue 1, pp 134–147 | Cite as

Synthesis and characterization of novel carboxymethyl Assam Bora rice starch for the controlled release of cationic anticancer drug based on electrostatic interactions

  • Sharmistha MohapatraEmail author
  • Anees Ahmad SiddiquiEmail author
  • Mohammed Anwar
  • Neha Bhardwaj
  • Sohail Akhter
  • Farhan Jalees Ahmad
Research Article


Carboxymethyl Assam Bora rice starch (CM-ABRS) was chemically synthesized in non-aqueous medium with the optimum degree of substitution (DS) of 1.23, and physicochemically characterized by FT-IR, DSC, XRD, and SEM analysis. Comparative evaluation of CM-ABRS with native starch (ABRS) for powder flow characteristics, swelling index, apparent solubility, rheological properties, textural properties, and mucoadhesive studies were carried out. The aim of the current work was to investigate the potential of CM-ABRS as a novel carrier for the water-soluble chemotherapeutic, doxorubicin hydrochloride (DOX). Formation of drug/polymer complex (DOX-CM-ABRS) via electrostatic interaction has been evaluated for the controlled release of DOX in three different pH media (phosphate-buffered saline (PBS), pH 7.4, 6.8, and 5.5). In vitro drug release studies illustrated faster release of drug in PBS at pH 5.5 as compared to pH 6.8 and pH 7.4, respectively, indicating the importance of pH-sensitive drug release from the DOX-CM-ABRS complex in malignant tissues.


drug delivery carboxymethylation degree of substitution doxorubicin hydrochloride pH-sensitive release 



We are grateful for support from the Indian Council of Medical Research (ICMR), India, as Senior Research Fellowship (Grant No. 45/36/2014-Nan/BMS). We also thank NII, New Delhi, India, for carrying out the SEM, and Jamia Millia Islamia, New Delhi, India, for conducting XRD analysis of samples.

Compliance with ethical standards

Conflict of interest

The authors state no conflict of interest and have received no payment in preparation of this manuscript.

Supplementary material

12249_2017_824_Fig9_ESM.gif (75 kb)
Supplemental Figure S1

1H NMR spectra of (a) ABRS, (b) CM-ABRS and 13C NMR spectra of (c) ABRS, (d) CM-ABRS. (GIF 74 kb).

12249_2017_824_MOESM1_ESM.tif (13.1 mb)
High Resolution Image (TIFF 13414 kb).
12249_2017_824_Fig10_ESM.gif (59 kb)
Supplemental Figure S2

Fluorescence spectra of DOX (120 μg/4.5 mL DDW) incubated with increasing amounts of ABRS. (GIF 59 kb).

12249_2017_824_MOESM2_ESM.tif (9.4 mb)
High Resolution Image (TIFF 9613 kb).
12249_2017_824_Fig11_ESM.gif (80 kb)
Supplemental Figure S3

FT-IR spectrum of DOX-ABRS complex. (GIF 79 kb).

12249_2017_824_MOESM3_ESM.tif (10.6 mb)
High Resolution Image (TIFF 10811 kb).


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Copyright information

© American Association of Pharmaceutical Scientists 2017

Authors and Affiliations

  • Sharmistha Mohapatra
    • 1
    • 2
    Email author
  • Anees Ahmad Siddiqui
    • 1
    Email author
  • Mohammed Anwar
    • 2
  • Neha Bhardwaj
    • 2
  • Sohail Akhter
    • 3
  • Farhan Jalees Ahmad
    • 2
  1. 1.Department of Pharmaceutical Chemistry, Faculty of PharmacyJamia Hamdard (Hamdard University)New DelhiIndia
  2. 2.Nanoformulation Research Laboratory, Faculty of PharmacyHamdard UniversityNew DelhiIndia
  3. 3.LE STUDIUM® Loire Valley Institute for Advanced StudiesOrléansFrance

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