PMID- 36924386 OWN - NLM STAT- MEDLINE DCOM- 20230320 LR - 20230320 IS - 1578-1267 (Electronic) IS - 0301-0546 (Linking) VI - 51 IP - S Pt 1 DP - 2023 TI - Evaluating the influence of cold plasma bubbling on protein structure and allergenicity in sesame milk. PG - 1-13 LID - 10.15586/aei.v51iSP1.783 [doi] AB - BACKGROUND: Sesame is a traditional oilseed comprising essential amino acids. However, the presence of allergens in sesame is a significant problem in its consumption; thus, this study attempted to reduce these allergens in sesame oilseeds. OBJECTIVE: The present study aimed to evaluate the effect of cold plasma processing on structural changes in proteins, and thereby the alteration of allergenicity in sesame milk. Method: Sesame milk (300 mL) was processed using atmospheric pressure plasma bubbling unit (dielectric barrier discharge, power: 200 V, and airflow rate: 16.6 mL/min) at different exposure times (10, 20, and 30 min). RESULTS: The efficiency of plasma-bubbling unit as measured by electron paramagnetic resonance in terms of producing reactive hydroxyl (OH) radicals proved that generation of reactive species increased with exposure time. Further, the plasma-processed sesame milk subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis and differential scanning calorimetery analysis revealed that plasma bubbling increased the oxidation of proteins with respect to bubbling time. The structural analysis by Fourier transform infrared spectroscopy and circular dichroism revealed that the secondary structure of proteins was altered after plasma application. This change in the protein structure helped in changing the immunoglobulin E (IgE)-binding epitopes of the protein, which in turn reduced the allergen-binding capacity by 23% at 20-min plasma bubbling as determined by the sandwich-type enzyme-linked immunosorbent assay. However, 30-min plasma bubbling intended to increase allergenicity, possibly because of increase in IgE binding due to the generation of neo epitopes. CONCLUSION: These changes proved that plasma bubbling is a promising technology in oxidizing protein structure, and thereby reducing the allergenicity of sesame milk. However, increase in binding at 30-min bubbling is to be studied to facilitate further reduction of the binding capacity of IgE antibodies. FAU - Manoharan, Dharini AU - Manoharan D AD - Centre of Excellence in Non-Thermal Processing, National Institute of Food Technology, Entrepreneurship, and Management, Thanjavur (NIFTEM-T, formerly Indian Institute of Food Processing and Technology), Ministry of Food Processing Industries (MoFPI), Government of India, Pudukkottai Road, Thanjavur, Tamil Nadu, India. FAU - Rajan, Anbarasan AU - Rajan A AD - Centre of Excellence in Non-Thermal Processing, National Institute of Food Technology, Entrepreneurship, and Management, Thanjavur (NIFTEM-T, formerly Indian Institute of Food Processing and Technology), Ministry of Food Processing Industries (MoFPI), Government of India, Pudukkottai Road, Thanjavur, Tamil Nadu, India. FAU - Stephen, Jaspin AU - Stephen J AD - Centre of Excellence in Non-Thermal Processing, National Institute of Food Technology, Entrepreneurship, and Management, Thanjavur (NIFTEM-T, formerly Indian Institute of Food Processing and Technology), Ministry of Food Processing Industries (MoFPI), Government of India, Pudukkottai Road, Thanjavur, Tamil Nadu, India. FAU - Radhakrishnan, Mahendran AU - Radhakrishnan M AD - Centre of Excellence in Non-Thermal Processing, National Institute of Food Technology, Entrepreneurship, and Management, Thanjavur (NIFTEM-T, formerly Indian Institute of Food Processing and Technology), Ministry of Food Processing Industries (MoFPI), Government of India, Pudukkottai Road, Thanjavur, Tamil Nadu, India; mahendran@iifpt.edu.in. LA - eng PT - Journal Article DEP - 20230313 PL - Singapore TA - Allergol Immunopathol (Madr) JT - Allergologia et immunopathologia JID - 0370073 RN - 0 (Allergens) RN - 0 (Plasma Gases) RN - 0 (Epitopes) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Humans MH - Animals MH - Allergens MH - Milk MH - *Sesamum MH - *Plasma Gases/analysis MH - Epitopes/analysis MH - Immunoglobulin E OTO - NOTNLM OT - EPR OT - allergenicity OT - circular dichroism OT - plasma bubbling OT - sesame milk COIS- The consent of all the authors of this paper was obtained for submitting the manuscript, and no potential conflict of interest was declared. EDAT- 2023/03/17 06:00 MHDA- 2023/03/21 06:00 CRDT- 2023/03/16 06:33 PHST- 2022/10/05 00:00 [received] PHST- 2022/12/21 00:00 [accepted] PHST- 2023/03/16 06:33 [entrez] PHST- 2023/03/17 06:00 [pubmed] PHST- 2023/03/21 06:00 [medline] AID - 10.15586/aei.v51iSP1.783 [doi] PST - epublish SO - Allergol Immunopathol (Madr). 2023 Mar 13;51(S Pt 1):1-13. doi: 10.15586/aei.v51iSP1.783. eCollection 2023.