ESI-mass spectrometry analysis of unsubstituted and disubstituted β-cyclodextrins: fragmentation mode and identification of the AB, AC, AD regioisomers

AbstractThe study of unsubstituted and disubstituted β-cyclodextrins (β-CDs) by ESI-mass spectrometry is reported, applying a cone-induced fragmentation in the presence of a twofold excess of sodium chloride, in order to gain information about the fragmentation of the different regioisomers. On the basis of the fragmentation pattern observed for the unsusbstituted β-CD, a statistical model shows that the fragments generated by every regioisomer of a disubstituted CD (AB, AC, and AD) are expected to differ in their relative intensity and, therefore, they can be used for correctly identifying the three different regioisomers. The model was tested on the three regioisomeric (AB, AC, and AD) diamino-β-CDs and ditosyl-β-CD and on the AC and AD regioisomers of dimesitylenesulphonyl-β-CD, allowing in every case through statistical analysis of the fragmentation pattern the correct assignment of every regioisomer on the basis of an ESI mass spectrum (single quadrupole analyzer, high cone voltage) of the pure compounds. The absolute intensities of the fragmentation peaks were voltage-dependent but their ratios was voltage-independent, indicating that no mass bias in peak ratios is introduced by the analyzer. Given the fast time of analysis and its general applicability, independently from the substituents, we propose our method as an easy way to identify the regioisomers of disubstituted β-CDs

PNA–NLS conjugates as single-molecular activators of target sites in double-stranded DNA for site-selective scission

Artificial DNA cutters have been developed by us in our previous studies by combining two strands of pseudo-complementary peptide nucleic acid (pcPNA) with Ce(IV)–EDTA-promoted hydrolysis. The pcPNAs have two modified nucleobases (2,6-diaminopurine and 2-thiouracil) instead of conventional A and T, and can invade double-stranded DNA to activate the target site for the scission. This system has been applied to site-selective scissions of plasmid, λ-phage, E. coli genomic DNA, and human genomic DNA. Here, we have reported a still simpler and more convenient DNA cutter obtained by conjugating peptide nucleic acid (PNA) with a nuclear localization signal (NLS) peptide. This new DNA cutter requires only one PNA strand (instead of two) bearing conventional (non-pseudo-complementary) nucleobases. This PNA–NLS conjugate effectively activated the target site in double-stranded DNA and induced site-selective scission by Ce(IV)–EDTA. The complex formation between the conjugate and DNA was concretely evidenced by spectroscopic results based on time-resolved fluorescence. The target scission site of this new system was straightforwardly determined by the Watson–Crick base pairing rule, and mismatched sequences were clearly discriminated. Importantly, even highly GC-rich regions, which are difficult to be targeted by a previous strategy using pcPNA, were successfully targeted. All these features of the present DNA cutter make it promising for various future applications

Efficacy of an infant formula manufactured from a specific protein hydrolysate derived from whey protein isolate and concentrate produced by Société des Produits Nestlé S.A. in reducing the risk of developing atopic dermatitis

The European Commission asked EFSA to evaluate the efficacy of an infant formula, containing a specific protein hydrolysate derived from whey protein isolate and concentrate and manufactured by Société des Produits Nestlé S.A., in reducing the risk of developing atopic dermatitis in infants with a family history of allergy. This was following the submission of a dossier by Société des Produits Nestlé S.A. to the European Commission, in the context of Regulation (EU) 2016/127. The protein hydrolysate from which the infant formula is produced is included in Annex I and II of Commission delegated Regulation (EU) 2016/127 as suitable protein source for the manufacture of infant and follow-on formulae. This opinion does not cover the assessment of the nutritional safety and suitability of the infant formula or the safety of the food enzymes used in the manufacture of the protein hydrolysate. The Panel considers that, in relation to the effect that is claimed, the infant formula under evaluation is not sufficiently characterised with respect to the molecular weight distribution of peptides. From the human intervention studies submitted, no conclusions could be drawn on the efficacy of the infant formula in reducing the risk of developing atopic dermatitis. The Panel concludes that a cause-and-effect relationship has not been established between the consumption of the infant formula under evaluation and the reduction in the risk of developing atopic dermatitis in infants with a family history of allergy

Scientific Opinion related to a notification from DuPont Nutrition Biosciences Aps on behenic acid from mustard seeds to be used in the manufacturing of certain emulsifiers pursuant to Article 21(2) of Regulation (EU) No 1169/2011 – for permanent exemption from labelling

Following a request from the European Commission, the Panel on Dietetic Products, Nutrition andAllergies (NDA) was asked to deliver a scienti\ufb01c opinion related to a noti\ufb01cation from DuPont NutritionBiosciences Aps on behenic acid from mustard seeds to be used in the manufacturing of certainemulsi\ufb01ers pursuant to Article 21(2) of Regulation (EU) No 1169/2011 \u2013 for permanent exemptionfrom labelling. Behenic acid is produced from rapeseed\u2013mustard seed variants prevalent in India,namely Brassica juncea (L.) Czern. (oriental mustard), Brassica rapa (L.) (brown/yellow Sarson orToria), Brassica napus (L.) (rapeseed) and Brassica nigra (L.) W.D.J.Koch (black mustard). No humanor animal allergenicity data were provided by the applic ant for either behenic acid or the emulsi\ufb01ersmanufactured from beheni c acid. Based on enzyme-linke d immunosorbent assay (ELISA) data, thePanel considers that proteins and peptides may not be carried over into behenic acid after the twodistillation steps reported in the manufacturing process in amounts beyond 1 mg/kg. The Panel notesthat the maximum amount of mustard protein that could be consumed from emulsi\ufb01ers manufacturedfrom behenic acid (E 470a, E 471 and E 477) on a single occasion by an adult under the proposedconditions of use would be around 0.00119 mg, which is about 1,000 times lower than the proteindoses repo rted to trigger allergic reactions in mustard-allergic individuals (around 1 mg). On the basisof the data presented, the Panel concludes that oral consumption of emulsi\ufb01ers manufactured usingbehenic acid from mustard seeds (E 470a, E 471 and E 477) are unli kely to trigger an allergic reactionin susceptible individuals (i.e. mustard-allergic individuals) under the proposed conditions of use

Safety of dried fruits of Synsepalum dulcificum as a novel food pursuant to Regulation (EU) 2015/2283

Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on dried fruits of Synsepalum dulcificum as a novel food (NF) pursuant to Regulation (EU) 2015/2283. The NF is pitted and dried (by lyophilisation) fruits of S. dulcificum. The NF contains the glycoprotein miraculin (≤ 2.5%) which causes sour and acidic foods to taste sweet. The fruits have a documented history of consumption in Africa and products thereof can be found in different markets worldwide. Information on the production process and the composition of the NF is sufficient and does not raise safety concerns. The applicant proposes to use the NF as or in food supplements for the adult population, excluding pregnant and lactating women, at a maximum daily amount of 0.9 g. Taking into account these conditions of use, the Panel considers that the consumption of the NF is not nutritionally disadvantageous. The provided genotoxicity studies do not raise concerns for genotoxicity of the NF. The Panel concludes that the only dose tested in a 90-day oral toxicity study of 2,000 mg/kg body weight (bw) per day was not associated with adverse effects. By applying an uncertainty factor of 200, the Panel concludes that the NF is safe at an intake level of 10 mg/kg bw per day, corresponding to a maximum daily intake of 0.7 g of the NF for the target population, rather than 0.9 g/day as proposed by the applicant

Safety of extended uses of UV-treated baker's yeast as a Novel Food pursuant to Regulation (EU) 2015/2283

In 2014, the EFSA NDA Panel concluded that UV-treated baker's yeast containing up to 3.5 Mio IU of vitamin D/100 g, is safe under the proposed conditions of use for yeast-leavened breads, rolls and fine bakery wares, and food supplements. Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on an application for an extension of the use of UV-treated baker's yeast as a novel food (NF) pursuant to Regulation (EU) 2015/2283. In this extension of use, the applicant proposed a broad range of food categories to which the NF can be added. On the basis of the proposed uses and maximum use levels, the Panel estimated the potential exposure to vitamin D from the NF and the potential combined exposure to vitamin D including also exposure from the background diet and food supplements. The Panel notes that the upper level (UL) for one age group, i.e. children aged 4-10 years, is exceeded by 4%, when summing up the highest P95 estimate for the background diet (including food supplements) and the highest P95 estimate for vitamin D from the NF under the proposed uses and maximum use levels. The Panel notes, however, the highly conservative approach for estimating the potential intake of vitamin D from the NF, given that the applicant has proposed 34 FoodEx2 level 2 food categories. Thus, the Panel considers that the UL for children aged between 4 and 10 years is highly unlikely to be exceeded. The Panel concludes that the NF is safe under the proposed conditions of use

Safety of hydrothermally treated kernels from edible Jatropha curcas L. (Chuta) as a novel food pursuant to Regulation (EU) 2015/2283

[EN] Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on hydrothermally treated kernels from edible Jatropha curcas (Chuta) as a novel food (NF) pursuant to Regulation (EU) 2015/2283. Although Jatropha curcas is generally considered a toxic plant due to the presence of phorbol esters (PEs), edible varieties exist in Central America. The applicant has developed a breeding programme for an edible cultivar and proposes the kernels from this cultivar as an NF as whole kernels or fragments thereof to be used as a snack or as a food ingredient. Procedures are in place to avoid commingling with non-edible kernels, with the last steps being the analytical control of PEs concentrations in all produced batches. The Panel considers that the production process of the NF is sufficiently described and that the information provided on the composition of the NF is sufficient for its characterisation. Components of the NF were tested for genotoxicity applying the standard in vitro test battery and no genotoxic concerns have been identified. In a conservative scenario for exposure to PEs from the NF, it was assumed that all kernels contain PEs at the level of detection of the analytical method. When comparing the estimated maximum exposure to PEs with a reference point from a subchronic study in pigs, a margin of exposure ≥ 900 is obtained, which is considered sufficiently large. The presence of anti-nutritional factors does not pose safety concerns as they are within the ranges found in vegetables. The Panel concludes that the NF is safe under the proposed conditions of useSIThe Panel wishes to thank the Working Group on Compendium of Botanicals, Eirini Kouloura and Petra Gergelova for the support provided to this scientific outpu

Safety of an aqueous ethanolic extract of Labisia pumila as a novel food pursuant to Regulation (EU) 2015/2283

[EN] Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on aqueous extract of Labisia pumila as a novel food (NF) pursuant to Regulation (EU) 2015/2283. The NF is a standardised hydroalcoholic extract from a dried whole plant (including roots) of L. pumila, mixed with maltodextrin (as a drying aid), and proposed by the applicant to be used as a food supplement in amounts up to 750 mg/day. The target population is the general adult population, except pregnant and lactating women. The major constituents of this NF are carbohydrates (up to 85.5%), with a smaller amount of proteins (up to 6.5%), gallic acid (up to 3.7%) and fats (up to 1.6%). The Panel considers that taking into account the composition of the NF and the proposed conditions of use, consumption of the NF is not nutritionally disadvantageous. The provided genotoxicity studies do not raise concerns about the genotoxicity of the NF. Based on the available toxicological data, the Panel considers an intake of up to 5 mg/kg body weight per day as safe. For the target population, this level corresponds to 350 mg/day, which is lower than the use level proposed by the applicant. The Panel concludes that the NF is safe for the target population up to 350 mg/dayS

Safety of cranberry extract powder as a novel food ingredient pursuant to Regulation (EC) No 258/97

Following a request from the European Commission, the EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) was asked to deliver an opinion on 'cranberry extract powder' as a novel food (NF)submitted pursuant to Regulation (EC) No 258/97 of the European Parliament and of the Council. The NF contains about 55-60% proanthocyanidins ( PACs). The Panel considers that the information provided on the composition, the specifications, batch-to-batch variability and stability of the NF is sufficient and does not raise safety concerns. Cranberry extract powder is produced from cranberry juice concentrate through an ethanolic extraction using an adsorptive resin column to retain the phenolic components. The Panel considers that the production process is sufficiently described and does not raise concerns about the safety of the novel food. The NF is intended to be added to beverages and yogurts to provide 80 mg PACs per serving. The target population is the adult general population. The mean and 95th percentile estimates for the all-user intakes from all proposed food-uses are 68 and 192 mg/day, respectively, for female adults, and 74 mg/day and 219 mg/day, respectively, for male adults. Taking into account the composition of the novel food and the intended use levels, the Panel considers that the consumption of the NF is not nutritionally disadvantageous. While no animal toxicological studies have been conducted on the NF, a number of human clinical studies have been conducted with cranberry products. Considering the composition, manufacturing process, intake, history of consumption of the source and human data, the Panel considers that the data provided do not give reasons for safety concerns. The Panel concludes that the cranberry extract powder is safe as a food ingredient at the proposed uses and use levels. (C) 2017 European Food Safety Authority. EFSA Journal published by John Wiley and Sons Ltd on behalf of European Food Safety Authority

Safety of dried coffee husk (cascara) from Coffea arabica L. as a Novel food pursuant to Regulation (EU) 2015/2283

[EN] Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on dried coffee husk (cascara) from Coffea arabica L. as a novel food (NF) pursuant to Regulation (EU) 2015/2283. The NF comprises the skin (exocarp), pulp (mesocarp), mucilage (pectin), parchment (endocarp) and a portion of the silver skin of the coffee fruit, and consists mainly of digestible carbohydrates, dietary fibre and water. The Panel considers that there are no safety concerns regarding the stability of the NF if the NF complies with the proposed specification limits during its entire shelf-life. The NF as such will not be consumed, instead, beverages produced with the infusion of the NF in water will be available to consumers. Considering an 100% extraction of caffeine from the NF to the beverage, the specification limit set for caffeine and the proposed use levels, the maximum concentration of caffeine in infusions produced using the NF could be up to 600 mg/L of drink, a concentration comparable to those in coffee beverages. The Panel notes that consumption of beverages produced using the NF will add significantly to the total dietary intake of caffeine of the general population. The consumption of beverages containing caffeine is not recommended for children, pregnant or breast-feeding women if the caffeine content exceeds 150 mg/L. Taking into account the nature of the NF, the history of use of the NF as food and the proposed uses and use levels, the Panel considers that no toxicological studies are required on the NF. The risk of allergic reactions to the NF is considered low. The Panel concludes that the NF, dried husk of the fruit of Coffea arabica L., is safe under the proposed conditions of useSIThe Panel wishes to thank Panagiota Zakidou and Gabriela Precup who, as trainees, provided support to the preparation of this scientific outpu