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Impact of Cold Plasma on Extraction of Polyphenol From De-Oiled Rice and Corn Bran: Improvement in Extraction Efficiency, In Vitro Digestibility, Antioxidant Activity, Cytotoxicity and Anti-Inflammatory Responses

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Abstract

The main objective of this study was to investigate the impact of atmospheric and vacuum cold plasma on extraction efficiency of polyphenols from de-oiled rice and corn bran. Further, the extracted phenolic compounds from rice and corn bran were analysed for their bioactivity, in vitro digestibility, cytotoxicity and anti-inflammatory activities. In this study, cold plasma processing was observed to significantly (p < 0.05) enhance the content of individual polyphenols extracted from rice bran (vanillin, ferulic acid, sinapic acid and chlorogenic acid) and corn bran (4-hydroxybenzaldehyde, p-coumaric, sinapic acid and ferulic acid) in comparison with conventional extraction. Moreover, significant increment was also found in total phenolic content, total flavonoid content and antioxidant activity of extracted polyphenols. In vitro digestibility was observed higher for vacuum cold-plasma-treated rice bran polyphenol, while it was higher for atmospheric cold-plasma-treated corn bran polyphenols. Cell viability and anti-inflammatory activity were also found to be significantly enhanced (p < 0.05) with cold-plasma-extracted polyphenols. The enhanced release of polyphenols could be due to puncture in brans upon cold plasma treatment as revealed through scanning electron microscope. Hence, the present study documented the use of atmospheric and vacuum cold plasma for the first time for enhanced extraction of polyphenols from industrial waste like rice and corn bran. Also, the obtained polyphenols were observed for better in vitro digestibility, cell viability and anti-inflammatory activity.

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The datasets generated during the current study are available in the manuscript and supplementary information.

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Acknowledgements

The authors are thankful to the CEO, CIAB for support and guidance during the study. Deepak Mehta is highly grateful to the CSIR-SRF fellowship, CSIR, Government of India, for financial support

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Department of Biotechnology, Ministry of Science and Technology, Govt of India

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Correspondence to Sudesh Kumar Yadav.

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Credit Authorship Contribution Statement

Deepak Mehta did conceptualization, data curation, writingoriginal draft, writingreview & editing. Kamlendra Yadav performed data curation. Kartikey Chaturvedi Validated the data. U. S. Shivhare done supervision and writingreview and editing. Sudesh Kumar Yadav was involved in conceptualization, visualization, supervision, writing review and editing.

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Mehta, D., Yadav, K., Chaturvedi, K. et al. Impact of Cold Plasma on Extraction of Polyphenol From De-Oiled Rice and Corn Bran: Improvement in Extraction Efficiency, In Vitro Digestibility, Antioxidant Activity, Cytotoxicity and Anti-Inflammatory Responses. Food Bioprocess Technol 15, 1142–1156 (2022). https://doi.org/10.1007/s11947-022-02801-8

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  • DOI: https://doi.org/10.1007/s11947-022-02801-8

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