Abstract
Colorectal cancer has become the third most frequent reason of cancer death in men and women. Currently, natural compounds are being looked up to, for subversion and deterrence of cancers. Inositol hexaphosphate (IP6) is one such naturally occurring phosphorylated carbohydrate present in most legumes and cereals which acts as a potential antineoplastic agent and can be used effectively to prevent and treat colon carcinomas. Despite the immense potential, due to the prevalence of high charge and ability to form salts and chelates with various divalent metals, it gets excreted out quickly from the body. On reaching the colon in its original form, it can serve as an effective anticancer agent. Therefore, a suitable dosage form that can prevent the drugs from being absorbed from the upper gastrointestinal tract is required to be prepared, to target it to the colon. Thus, microspheres of IP6 using a biodegradable polymer that degrades in the colon were attempted using the solvent evaporation method. The formulation was investigated for percentage yield, encapsulation efficiency, particle size distribution modification, and release rate. Optimized formulation showed particle size of 92 ± 0.76 μm, entrapment efficiency of 67.26% ± 0.75, percent drug loading of 15.74%, and in vitro drug release 82.36 ± 0.51. The results of the in vivo study divulged that IP6 loaded pectin microspheres showed significant positive modulation of biomarker levels and restoration of colonic architecture to almost normal as observed through histopathology and scanning electron microscopy studies in DMH-induced colon tumors in Albino Wistar rats.
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Acknowledgments
The authors are grateful to Babasaheb Bhimrao Ambedkar University (BBAU), Lucknow, India, for providing the necessary infrastructure, research laboratory, and support during the course of the research study. We are thankful to ICMR (Ref. no.74/1/2017-Pers (EMS)) for the JRF to NM, and EMS to KPG.
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Mishra, N., Arya, M., Gupta, K.P. et al. Optimization of Inositol Hexaphosphate Colon Targeted Formulation for Anticarcinogenic Marker Modulation. AAPS PharmSciTech 20, 319 (2019). https://doi.org/10.1208/s12249-019-1529-2
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DOI: https://doi.org/10.1208/s12249-019-1529-2