Comparison between ovalbumin and ovalbumin peptide 323-339 responses in allergic mice: humoral and cellular aspects.

Abstract

Ovalbumin (OVA) is widely used in allergy research. OVA peptide 323-339 has been reported to be responsible for 25-35% of isolated BALB/c mouse T-cell response to intact OVA. An investigation of whether OVA and OVA 323-339 molecules can induce equivalent in vivo and in vitro immune responses was conducted. Eight-week-old BALB/c mice were randomly divided into three groups: OVA, OVA 323-339 and saline. On days 0, 7, 14, mice were intraperitoneally injected with 25 microg OVA or OVA 323-339 absorbed on 300 microg Alum, or saline; on days 21-23, all groups were challenged intranasally with either 20 microl of 1% OVA, 1% OVA 323-339 or saline. On day 28, after killing, splenocytes were isolated and cultured under the stimulus of each allergen or medium. Evaluated by hematoxylin/eosin and major basic protein immunohistochemical stainings, OVA and OVA 323-339 induced similar lung inflammation. Interestingly, significant serum total IgE and OVA-specific IgE were observed in OVA mice when compared to saline control. OVA 323-339 mice showed higher serum OVA-specific IgE, OVA 323-339-specific IgE, IL-4 and lower IFN-gamma similar to OVA mice. The proliferative response to OVA was found in cultured splenocytes of both OVA and OVA 323-339 mice, while the similar proliferative response to OVA 323-339 was only observed in the splenocytes of OVA 323-339-sensitized and challenged mice. Although OVA 323-339 induced a Th2-like response in the mouse model as did OVA, OVA 323-339 has clearly limited immunogenic potency to activate OVA-sensitized and challenged mice splenocytes, unlike OVA.

• Authors: L-Z Sun, S Elsayed, T B Aasen, T Van Do, N P Aardal, E Florvaag, K Vaali
• Journal: Scandinavian journal of immunology (Scand J Immunol) Vol. 71 Issue 5 Pg. 329-35 (May 2010) ISSN: 1365-3083 [Electronic] England
• PMID: 20500683 (Publication Type: Comparative Study, Journal Article)

Chemical References

• Allergens
• Immunodominant Epitopes
• OVA 323-339
• Peptide Fragments
• Interleukin-4
• Immunoglobulin E
• Interferon-gamma
• Ovalbumin

Topics

• Allergens (immunology)
• Animals
• Antibody Specificity
• Cells, Cultured
• Disease Models, Animal
• Hypersensitivity (blood, immunology)
• Immunization
• Immunodominant Epitopes (immunology)
• Immunoglobulin E (blood, immunology)
• Interferon-gamma (biosynthesis)
• Interleukin-4 (biosynthesis)
• Mice
• Mice, Inbred BALB C
• Ovalbumin (chemical synthesis, chemistry, immunology)
• Peptide Fragments (chemical synthesis, chemistry, immunology)
• Pneumonia (immunology)
• Spleen (immunology)
• Th2 Cells (immunology)