[An immunochemical analysis of enzymatic hydrolysates of milk and soy proteins intended for the production of specialized nutritional products]. / Immunokhimicheskii analiz fermentativnykh gidrolizatov belkov moloka i soi, prednaznachennykh dlia polucheniia spetsializirovannykh produktov pitaniia.

The capacities of immunoelectrophoresis in identification and assay of antigenic protein in enzymatic hydrolysates of milk and soya have been evaluated. The hydrolysates obtained under the action of pancreatin and protosubtilin were studied in milk protein concentrates "Dialact" and casezit and soya protein isolate "Adrex". Two-dimensional immunoelectrophoresis according to Clarke and Freeman was used to analyze the antigenic component spectrum in the samples. It has been shown that beta-lactoglobulin, as compared to other milk proteins, is most resistant to pancreatin-induced proteolysis in vitro. Pancreatin-induced proteolysis has been shown to be useful for trypsin inhibitor inactivation in soya protein isolate. It was demonstrated that immunoelectrophoresis could be used for complex evaluation of protein hydrolysates intended for manufacturing specialized foodstuffs.

[An experimental evaluation of the hypoallergenic action of fat constituents for specialized therapeutic products]. / Eksperimental'naia otsenka gipoallergennogo deistviia nekotorykh zhirovykh kompozitsii dlia spetsializirovannykh lechebnykh produktov.

The influence of fatty compositions with varying proportions of polyunsaturated fatty acids (PUFA) omega-6 and omega-3 on the manifestation severity of anaphylaxis to ovalbumin (OVA), whole pasteurized cow milk (WPCM), and sensitivity to histamine LD50 were investigated in male guinea pigs. Hypoallergenic effect to OVA and WPCM, decreased sensitivity to to histamine LD50 were manifested in the animals which received the fatty composition with a high ratio of omega-6 and omega-3 PUFA (24, 20). A correlation was established between the hypoallergenic action of the fatty composition and the content of medium- and long-chain saturated fatty acids in this composition. The results obtained have been considered with respect to the characteristics of the immunomodulatory effects of PUFA omega-6, omega-3 and saturated fatty acids.

[Complex experimental assessment of potential allergenicity of various isolates of soy proteins]. / Kompleksnaia éksperimental'naia otsenka potentsial'noi allergennosti nekotorykh obraztsov izoliatov soevykh belkov.

The complex evaluation was carried out of potential allergenicity of three soya protein specimens - IPS, IPS-1 and IPS-2 manufactured by Ardex R, USA, which were attended for employment as protein component of specialized infant formulae. The content of total protein, amino-nitrogen, peptide fractions of molecular weight below 9000 D, precipitating protein antigens, trypsin inhibitor, was studied in the specimens. The apparent digestibility was measured by a multienzymatic system in vitro. The allergenicity of isolates was compared by means of histamine LD50 resistance test in guinea pigs and also by the reaction of active anaphylactic shock (AAS). The evidences have been obtained that IPS specimen containing the lowest levels of trypsin inhibitor and small peptide levels is characterized by the lowest sensitizing activity in AAS and simultaneously decreases the animals' resistance to histamine in the highest degree. Apparent digestibility of all the three specimens did not differ significantly. A conclusion has been made that the evaluation is necessary of infant hypoallergenic formulae components by a complex of independent experimental data.