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Carbohydr Polym. 2015 Dec 10;134:167-74. doi: 10.1016/j.carbpol.2015.07.068. Epub 2015 Jul 23.

Gum arabic-curcumin conjugate micelles with enhanced loading for curcumin delivery to hepatocarcinoma cells.

Author information

1
Department of Chemistry, Indian Institute of Space Science and Technology (IIST), Valiamala, Thiruvananthapuram, Kerala 695 547, India. Electronic address: sarikapaithal@gmail.com.
2
Department of Chemistry, Indian Institute of Space Science and Technology (IIST), Valiamala, Thiruvananthapuram, Kerala 695 547, India. Electronic address: nirmala@iist.ac.in.
3
Tissue Culture Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram, Kerala 695 012, India. Electronic address: anilkumarpr@sctimst.ac.in.
4
Tissue Culture Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram, Kerala 695 012, India. Electronic address: kdeeps3@gmail.com.
5
Tissue Culture Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram, Kerala 695 012, India. Electronic address: tvkumary@yahoo.com.

Abstract

Curcumin is conjugated to gum arabic, a highly water soluble polysaccharide to enhance the solubility and stability of curcumin. Conjugation of curcumin to gum arabic is confirmed by (1)H NMR, fluorescence and UV spectroscopy studies. The conjugate self assembles to spherical nano-micelles (270 ± 5 nm) spontaneously, when dispersed in aqueous medium. Spherical morphology of the self assembled conjugate is evidenced by field emission scanning electron microscopy and transmission electron microscopy. The self assembly of the amphiphilic conjugate into micelle in aqueous medium significantly enhances the solubility (900 fold of that of free curcumin) and stability of curcumin in physiological pH. The anticancer activity of the conjugate micelles is found to be higher in human hepatocellular carcinoma (HepG2) cells than in human breast carcinoma (MCF-7) cells. The conjugate exhibits enhanced accumulation and toxicity in HepG2 cells due to the targeting efficiency of the galactose groups present in gum arabic.

KEYWORDS:

Curcumin; Gum arabic; Micelle; Polymer-drug conjugate; Self assembly

PMID:
26428113
DOI:
10.1016/j.carbpol.2015.07.068
[Indexed for MEDLINE]

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