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Rajendran SRCK, Udenigwe CC, Yada RY. Nanochemistry of Protein-Based Delivery Agents. Front Chem 2016; 4:31. [PMID: 27489854 PMCID: PMC4951518 DOI: 10.3389/fchem.2016.00031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/05/2016] [Indexed: 11/13/2022] Open
Abstract
The past decade has seen an increased interest in the conversion of food proteins into functional biomaterials, including their use for loading and delivery of physiologically active compounds such as nutraceuticals and pharmaceuticals. Proteins possess a competitive advantage over other platforms for the development of nanodelivery systems since they are biocompatible, amphipathic, and widely available. Proteins also have unique molecular structures and diverse functional groups that can be selectively modified to alter encapsulation and release properties. A number of physical and chemical methods have been used for preparing protein nanoformulations, each based on different underlying protein chemistry. This review focuses on the chemistry of the reorganization and/or modification of proteins into functional nanostructures for delivery, from the perspective of their preparation, functionality, stability and physiological behavior.
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Dupuis JH, Lu ZH, Yada RY, Liu Q. The effect of thermal processing and storage on the physicochemical properties andin vitrodigestibility of potatoes. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13184] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pinhero RG, Waduge RN, Liu Q, Sullivan JA, Tsao R, Bizimungu B, Yada RY. Evaluation of nutritional profiles of starch and dry matter from early potato varieties and its estimated glycemic impact. Food Chem 2016; 203:356-366. [DOI: 10.1016/j.foodchem.2016.02.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 01/29/2016] [Accepted: 02/04/2016] [Indexed: 11/26/2022]
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Tian J(J, Bryksa BC, Yada RY. Feeding the world into the future – food and nutrition security: the role of food science and technology. FRONTIERS IN LIFE SCIENCE 2016. [DOI: 10.1080/21553769.2016.1174958] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Guo Q, Kang J, Wu Y, Cui SW, Hu X, Yada RY. A molecular modeling approach to understand the structure and conformation relationship of (Glc p A)Xylan. Carbohydr Polym 2015; 134:175-81. [DOI: 10.1016/j.carbpol.2015.06.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 06/05/2015] [Accepted: 06/11/2015] [Indexed: 11/25/2022]
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Gayin J, Bertoft E, Manful J, Yada RY, Abdel-Aal ESM. Molecular and thermal characterization of starches isolated from African rice (Oryza glaberrima). STARCH-STARKE 2015. [DOI: 10.1002/star.201500145] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kalinga DN, Bertoft E, Tetlow I, Liu Q, Yada RY, Seetharaman K. Evolution of amylopectin structure in developing wheat endosperm starch. Carbohydr Polym 2014; 112:316-24. [DOI: 10.1016/j.carbpol.2014.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 05/02/2014] [Accepted: 05/06/2014] [Indexed: 10/25/2022]
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Dupuis JH, Liu Q, Yada RY. Methodologies for Increasing the Resistant Starch Content of Food Starches: A Review. Compr Rev Food Sci Food Saf 2014. [DOI: 10.1111/1541-4337.12104] [Citation(s) in RCA: 159] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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34
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Xiao H, Bryksa BC, Bhaumik P, Gustchina A, Kiso Y, Yao SQ, Wlodawer A, Yada RY. The zymogen of plasmepsin V from Plasmodium falciparum is enzymatically active. Mol Biochem Parasitol 2014; 197:56-63. [PMID: 25447707 PMCID: PMC6310130 DOI: 10.1016/j.molbiopara.2014.10.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 10/15/2014] [Accepted: 10/16/2014] [Indexed: 10/24/2022]
Abstract
Plasmepsin V, a membrane-bound aspartic protease present in Plasmodium falciparum, is involved in the export of malaria parasite effector proteins into host erythrocytes and therefore is a potential target for antimalarial drug development. The present study reports the bacterial recombinant expression and initial characterization of zymogenic and mature plasmepsin V. A 484-residue truncated form of proplasmepsin (Glu37-Asn521) was fused to a fragment of thioredoxin and expressed as inclusion bodies. Refolding conditions were optimized and zymogen was processed into a mature form via cleavage at the Asn80-Ala81 peptide bond. Mature plasmepsin V exhibited a pH optimum of 5.5-7.0 with Km and kcat of 4.6 μM and 0.24s(-1), respectively, at pH 6.0 using the substrate DABCYL-LNKRLLHETQ-E(EDANS). Furthermore, the prosegment of proplasmepsin V was shown to be nonessential for refolding and inhibition. Unexpectedly, unprocessed proplasmepsin V was enzymatically active with slightly reduced substrate affinity (∼ 2-fold), and similar pH optimum as well as turnover compared to the mature form. Both zymogenic and mature plasmepsin V were partially inhibited by pepstatin A as well as several KNI aspartic protease inhibitors while certain metals strongly inhibited activity. Overall, the present study provides the first report on the nonessentiality of the prosegment for plasmepsin V folding and activity, and therefore, subsequent characterization of its structure-function relationships of both zymogen and mature forms in the development of novel inhibitors with potential antimalarial activities is warranted.
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Smith JL, Yada RY. Chemical Modification of Amino Groups inMucor mieheiAspartyl Proteinase, Porcine Pepsin, and Chymosin. II. Conformational Stability. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1991.10870916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Smith JL, Billings GE, Yada RY. Chemical Modification of Amino Groups inMucor mieheiAspartyl Proteinase, Porcine Pepsin, and Chymosin. I. Structure and Function. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1991.10870915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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De Moura DC, Bryksa BC, Yada RY. In silico insights into protein-protein interactions and folding dynamics of the saposin-like domain of Solanum tuberosum aspartic protease. PLoS One 2014; 9:e104315. [PMID: 25188221 PMCID: PMC4154668 DOI: 10.1371/journal.pone.0104315] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 06/09/2014] [Indexed: 12/29/2022] Open
Abstract
The plant-specific insert is an approximately 100-residue domain found exclusively within the C-terminal lobe of some plant aspartic proteases. Structurally, this domain is a member of the saposin-like protein family, and is involved in plant pathogen defense as well as vacuolar targeting of the parent protease molecule. Similar to other members of the saposin-like protein family, most notably saposins A and C, the recently resolved crystal structure of potato (Solanum tuberosum) plant-specific insert has been shown to exist in a substrate-bound open conformation in which the plant-specific insert oligomerizes to form homodimers. In addition to the open structure, a closed conformation also exists having the classic saposin fold of the saposin-like protein family as observed in the crystal structure of barley (Hordeum vulgare L.) plant-specific insert. In the present study, the mechanisms of tertiary and quaternary conformation changes of potato plant-specific insert were investigated in silico as a function of pH. Umbrella sampling and determination of the free energy change of dissociation of the plant-specific insert homodimer revealed that increasing the pH of the system to near physiological levels reduced the free energy barrier to dissociation. Furthermore, principal component analysis was used to characterize conformational changes at both acidic and neutral pH. The results indicated that the plant-specific insert may adopt a tertiary structure similar to the characteristic saposin fold and suggest a potential new structural motif among saposin-like proteins. To our knowledge, this acidified PSI structure presents the first example of an alternative saposin-fold motif for any member of the large and diverse SAPLIP family.
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Dee DR, Horimoto Y, Yada RY. Conserved prosegment residues stabilize a late-stage folding transition state of pepsin independently of ground states. PLoS One 2014; 9:e101339. [PMID: 24983988 PMCID: PMC4077824 DOI: 10.1371/journal.pone.0101339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 06/05/2014] [Indexed: 11/24/2022] Open
Abstract
The native folding of certain zymogen-derived enzymes is completely dependent upon a prosegment domain to stabilize the folding transition state, thereby catalyzing the folding reaction. Generally little is known about how the prosegment accomplishes this task. It was previously shown that the prosegment catalyzes a late-stage folding transition between a stable misfolded state and the native state of pepsin. In this study, the contributions of specific prosegment residues to catalyzing pepsin folding were investigated by introducing individual Ala substitutions and measuring the effects on the bimolecular folding reaction between the prosegment peptide and pepsin. The effects of mutations on the free energies of the individual misfolded and native ground states and the transition state were compared using measurements of prosegment-pepsin binding and folding kinetics. Five out of the seven prosegment residues examined yielded relatively large kinetic effects and minimal ground state perturbations upon mutation, findings which indicate that these residues form strengthened and/or non-native contacts in the transition state. These five residues are semi- to strictly conserved, while only a non-conserved residue had no kinetic effect. One conserved residue was shown to form native structure in the transition state. These results indicated that the prosegment, which is only 44 residues long, has evolved a high density of contacts that preferentially stabilize the folding transition state over the ground states. It is postulated that the prosegment forms extensive non-native contacts during the process of catalyzing correct inter- and intra-domain contacts during the final stages of folding. These results have implications for understanding the folding of multi-domain proteins and for the evolution of prosegment-catalyzed folding.
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Yada RY, Buck N, Canady R, DeMerlis C, Duncan T, Janer G, Juneja L, Lin M, McClements DJ, Noonan G, Oxley J, Sabliov C, Tsytsikova L, Vázquez-Campos S, Yourick J, Zhong Q, Thurmond S. Engineered Nanoscale Food Ingredients: Evaluation of Current Knowledge on Material Characteristics Relevant to Uptake from the Gastrointestinal Tract. Compr Rev Food Sci Food Saf 2014; 13:730-744. [DOI: 10.1111/1541-4337.12076] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 03/25/2014] [Indexed: 12/30/2022]
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40
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Horimoto Y, Wang S, Yada RY. ¹H, ¹³C, and ¹⁵N backbone resonance assignments of the porcine pepsin and porcine pepsin complexed with pepstatin. BIOMOLECULAR NMR ASSIGNMENTS 2014; 8:57-61. [PMID: 23264006 DOI: 10.1007/s12104-012-9452-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 12/10/2012] [Indexed: 06/01/2023]
Abstract
Pepsin is formed as the zymogen, pepsinogen, which includes an additional 44 residue prosegment (PS) on the N-terminus. Upon acidification (pH <3) the PS is removed, yielding active pepsin. The PS is critical to such processes as the initiation of correct folding and protein stability. In the present study, the NMR assignments of the 34.6 kDa native porcine pepsin and porcine pepsin complexed with pepstatin are reported in order to obtain structural information regarding PS-catalyzed protein folding. Such information would contribute to a better understanding of the nature of folding/unfolding energy barrier of pepsin and other aspartic proteases.
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Wang S, Horimoto Y, Dee DR, Yada RY. Understanding the mechanism of prosegment-catalyzed folding by solution NMR spectroscopy. J Biol Chem 2014; 289:697-707. [PMID: 24265313 DOI: 10.1074/jbc.m113.505891] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Multidomain protein folding is often more complex than a two-state process, which leads to the spontaneous folding of the native state. Pepsin, a zymogen-derived enzyme, without its prosegment (PS), is irreversibly denatured and folds to a thermodynamically stable, non-native conformation, termed refolded pepsin, which is separated from native pepsin by a large activation barrier. While it is known that PS binds refolded pepsin and catalyzes its conversion to the native form, little structural details are known regarding this conversion. In this study, solution NMR was used to elucidate the PS-catalyzed folding mechanism by examining the key equilibrium states, e.g. native and refolded pepsin, both in the free and PS-bound states, and pepsinogen, the zymogen form of pepsin. Refolded pepsin was found to be partially structured and lacked the correct domain-domain structure and active-site cleft formed in the native state. Analysis of chemical shift data revealed that upon PS binding refolded pepsin folds into a state more similar to that of pepsinogen than to native pepsin. Comparison of pepsin folding by wild-type and mutant PSs, including a double mutant PS, indicated that hydrophobic interactions between residues of prosegment and refolded pepsin lower the folding activation barrier. A mechanism is proposed for the binding of PS to refolded pepsin and how the formation of the native structure is mediated.
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Udenigwe CC, Je JY, Cho YS, Yada RY. Almond protein hydrolysate fraction modulates the expression of proinflammatory cytokines and enzymes in activated macrophages. Food Funct 2014; 4:777-83. [PMID: 23575976 DOI: 10.1039/c3fo30327f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simulated gastrointestinal treatment of almond proteins with pepsin and pancreatic proteases resulting in 16.6% degree of hydrolysis or 1.33 milliequivalent leucine per g protein yielded a hydrolysate that modulated excessive nitric oxide production in lipopolysaccharide-activated RAW264.7 macrophages. After fractionation, a resulting fraction of molecular size > 5 kDa retained the nitric oxide modulatory effect observed initially in the crude hydrolysate. The high molecular size fraction was found to modulate levels of proinflammatory cytokines, interleukin (IL)-6, IL-1β, and tumour necrosis factor (TNF)-α in the activated cells. Immunoblotting analysis indicated that the hydrolysate fraction decreased the expression levels of inflammatory enzyme indicators, inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 in the activated cells. RT-PCR analysis showed that treatment of the activated cells with the hydrolysate fraction resulted in the inhibition of relative gene expressions of proinflammatory IL-6, IL-1β, TNF-α, iNOS and COX-2. These results indicate a potential application of almond protein hydrolysates against inflammatory conditions, and will contribute to delineating the possible contributions of proteins to health benefits attributed to almond consumption.
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Guo Q, Wang Q, Cui SW, Kang J, Hu X, Xing X, Yada RY. Conformational properties of high molecular weight heteropolysaccharide isolated from seeds of Artemisia sphaerocephala Krasch. Food Hydrocoll 2013. [DOI: 10.1016/j.foodhyd.2012.12.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bach S, Yada RY, Bizimungu B, Fan M, Sullivan JA. Genotype by environment interaction effects on starch content and digestibility in potato (Solanum tuberosum L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:3941-3948. [PMID: 23484744 DOI: 10.1021/jf3030216] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Biochemically, starch is composed of amylose and amylopectin but can also be defined by its digestibility rates within the human intestinal tract, i.e., rapidly digested (RDS), slowly digested (SDS), or resistant (RS). The relative ratio of these starch components is the main contributor to differences in the glycemic index (GI) of carbohydrate sources. This study evaluated the digestible starch profile of 12 potato genotypes comprising elite breeding lines and commercial varieties in six environments, with the optimal profile defined as low RDS and high SDS. Genotype by environment interaction (GEI) analysis found significant (p = 0.05) genotypic and environmental effects for all digestibility rate components; however, interaction effects were only significant for SDS. Optimal starch profiles were identified for two genotypes, CV96044-3 and Goldrush. The desirable starch profile in these potato cultivars can be exploited in breeding programs for the improvement of starch profile and other important characteristics such as high yields and disease resistance.
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Quansah JK, Udenigwe CC, Saalia FK, Yada RY. The effect of thermal and ultrasonic treatment on amino acid composition, radical scavenging and reducing potential of hydrolysates obtained from simulated gastrointestinal digestion of cowpea proteins. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2013; 68:31-8. [PMID: 23354934 DOI: 10.1007/s11130-013-0334-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The effect of thermal and ultrasonic treatment of cowpea proteins (CP) on amino acid composition, radical scavenging and reducing potential of hydrolysates (CPH) obtained from in vitro simulated gastrointestinal digestion of CP was evaluated. Hydrolysis of native and treated CP with gastrointestinal pepsin and pancreatin yielded CPH that displayed antioxidant activities based on oxygen radical scavenging capacity (ORAC), ferric reducing antioxidant power (FRAP) and superoxide radical scavenging activity (SRSA). CPH derived from the treated CP yielded higher ORAC values than CPH from untreated proteins. However, lower significant FRAP and SRSA values were observed for these samples compared to untreated CPH (p < 0.05). Amino acid analysis indicated that CP processing decreased total sulphur-containing amino acids in the hydrolysates, particularly cysteine. The amount of cysteine appeared to be positively related to FRAP and SRSA values of CPH samples, but not ORAC. The results indicated that thermal and ultrasonic processing of CP can reduce the radical scavenging and reducing potential of the enzymatic hydrolysates possibly due to the decreased amounts of cysteine. Since the hydrolysates were generated with gastrointestinal enzymes, it is possible that the resulting compounds are produced to exert some health functions during normal consumption of cowpea.
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Kalinga DN, Waduge R, Liu Q, Yada RY, Bertoft E, Seetharaman K. On the differences in the granular architecture and starch structure between pericarp and endosperm wheat starches. STARCH-STARKE 2013. [DOI: 10.1002/star.201200240] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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47
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Pinhero R, Pazhekattu R, Whitfield K, Marangoni AG, Liu Q, Yada RY. Effect of genetic modification and storage on the physico-chemical properties of potato dry matter and acrylamide content of potato chips. Food Res Int 2012. [DOI: 10.1016/j.foodres.2012.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bryksa BC, Yada RY. Nanotechnology: the word is new but the concept is old. An overview of the science and technology in food and food products at the nanoscale level. INTERNATIONAL JOURNAL OF FOOD STUDIES 2012. [DOI: 10.7455/ijfs/1.2.2012.a9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Food scientists and technologists are actively engaged in examining and developing nanotechnologies for applications such as novel functional ingredients and nutrient delivery systems, safety testing, packaging, and authenticity/authentication at an ever-increasing pace. However, before these new products/technologies are commercialised, rigorous safety testing and risk/benefit analysis are required to ensure that public and environmental concerns are addressed. This review provides an overview of food nanoscience and technology including a brief history, education, definitions pertaining to policy and regulation, and applications. The most recent findings and advances are emphasised, focussing on bioactives' delivery. In addition, proposed directions in the area of nano-based targeting of pathogens for food safety as well as medical foods are discussed. As food nanoscience and technology has been extensively reviewed in recent years, specific case examples will be limited to those reported within the past year.
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Lu ZH, Donner E, Yada RY, Liu Q. Impact of γ-irradiation, CIPC treatment, and storage conditions on physicochemical and nutritional properties of potato starches. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.07.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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50
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Pattorn S, Horimoto Y, Hongsprabhas P, Yada RY. Influence of aggregation on the antioxidative capacity of milk peptides. Int Dairy J 2012. [DOI: 10.1016/j.idairyj.2011.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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