Influence of lactoferrin and enzymatiс hydrolysates of cow’s and mare’s milk proteins on anaphylactic sensitivity and cytokine profile of rats

• Elena S. Simonenko
• Sergey V. Simonenko
• Ivan V. Gmoshinski
• Nikolay A. Riger
• Antonina A. Shumakova
• Sergey N. Zorin

Abstract

The development of innovative ingredients of specialized formula for children with intolerance to cow’s milk proteins requires accounting the influence of the protein component on the allergic sensitivity.

The aim of the research was to study the effect of lactoferrin (LF) from cow colostrum, cow’s milk protein hydrolysate (CMPH) and mare’s milk protein hydrolysate (MMPH) on the severity of the systemic anaphylaxis reaction, the levels of specific IgG antibodies and cytokines in rats parenterally sensitized with ovalbumin (OVA).

Material and methods. The experiment was carried out on 4 groups of 26 male Wistar rats, which were sensitized intraperitoneally with chicken egg OVA and a systemic anaphylaxis reaction was induced on the day 29 by intravenous administration of a challenge dose of the antigen (6 mg per kg body weight). LF, CMPH and MMPH were introduced into the diet in doses of 1.4–2 g/kg body weight per day (on an average 1.59±0.04, 1.53±0.05 and 1.48±0.05 g per kg body weight respectively). The content of IgG antibodies in the blood serum was determined by an indirect ELISA; the levels of cytokines IL-1α, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12(p70), IL-13, GM-CSF, IFN-γ and TNF-α were detected by multiplex immunoassay.

Results. Dietary LF did not have a significant effect on the severity of active anaphylactic shock (AAS), concentrations of antibodies and cytokines in the blood of animals. As a result of CMPH consumption, there were no significant changes in AAS severity and IgG antibodies to OVA but significant increase in TNF-α level was observed as well as a significant decrease in IL-1α (p<0.05). In animals receiving MMPH, there were also no significant changes in the severity of AAS, but a 1.9-fold decrease in the level of IgG antibodies to OVA (p<0.001) was noticed along with a significant increase in IL-12(p70) (p<0.05) and IL-10 (p<0.10) level.

Conclusion. Cosumption of LF by sensitized rats didn’t significantly affect their anaphylactic sensitivity and cytokine profile, while CMPH intake induced some signs of pro-inflammatory processes. Consumption of MMPH was accompanied by the formation of an anti-inflammatory cytokine profile, which corresponds to a decrease in the intensity of the humoral immune response to the model allergen. Differences in the effects of two hydrolisates, which have similar degrees of hydrolysis, may be associated with the specific composition of glycopeptides formed during the enzymatic cleavage of milk protein produced by these two species of dairy animals.

Keywords:food allergy; hypoallergenic formula; hydrolysate; mare’s milk; cow’s milk; lactoferrin; systemic anaphylaxis; T-lymphocytes; cytokines

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