Background IgE reactivity to fish allergens in atopic dogs, which are used as models for food allergy, has not been elucidated to date. We investigated IgE reactivity to crude and purified Pacific cod (Gadus macrocephalus) allergens in atopic dogs to identify the allergenic components of cod.
Methods Specific IgE to crude cod allergens in the sera of 179 atopic dogs, including 27 dogs with cod allergy, were measured using enzyme-linked immunosorbent assay (ELISA). The allergenic components of crude cod antigen were analyzed by ELISA, immunoblotting, and liquid chromatography-tandem mass spectrometry (LC-MS/MS). IgE reactivity to parvalbumin, collagen, and tropomyosin was evaluated using the sera of atopic dogs that were positive for specific IgE to crude cod allergens.
Results Specific IgE to crude cod allergens were present in 36 (20%) of the 179 atopic dogs and 12 (44%) of the 27 dogs with cod allergy. In allergen component analysis, IgE reactivity to tropomyosin and enolase was observed in the sera of dogs with cod allergy. Among the 36 dogs with IgE reactivity to crude cod extracts, 9 (25%), 14 (39%), and 18 (50%) dogs had specific IgE to parvalbumin, collagen, and tropomyosin, respectively.
Conclusions The dogs exhibited IgE reactivity to the cod allergen components similar to that observed in humans, providing support for the use of atopic dogs with fish allergy as a model for fish allergy in humans.

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On 14 Apr, 2020
On 14 Apr, 2020
Posted 17 Dec, 2019
On 26 Feb, 2020
Received 11 Feb, 2020
Received 03 Feb, 2020
On 15 Jan, 2020
On 14 Jan, 2020
Received 31 Dec, 2019
Invitations sent on 17 Dec, 2019
On 17 Dec, 2019
On 12 Dec, 2019
On 11 Dec, 2019
On 11 Dec, 2019
On 10 Dec, 2019
On 04 Sep, 2020
On 03 Sep, 2020
On 02 Sep, 2020
On 02 Sep, 2020
On 19 Jun, 2020
On 18 Jun, 2020
On 18 Jun, 2020
On 04 May, 2020
Received 28 Apr, 2020
Received 27 Apr, 2020
On 18 Apr, 2020
On 16 Apr, 2020
On 15 Apr, 2020
Invitations sent on 15 Apr, 2020
On 14 Apr, 2020
On 14 Apr, 2020
Posted 17 Dec, 2019
On 26 Feb, 2020
Received 11 Feb, 2020
Received 03 Feb, 2020
On 15 Jan, 2020
On 14 Jan, 2020
Received 31 Dec, 2019
Invitations sent on 17 Dec, 2019
On 17 Dec, 2019
On 12 Dec, 2019
On 11 Dec, 2019
On 11 Dec, 2019
On 10 Dec, 2019
Background IgE reactivity to fish allergens in atopic dogs, which are used as models for food allergy, has not been elucidated to date. We investigated IgE reactivity to crude and purified Pacific cod (Gadus macrocephalus) allergens in atopic dogs to identify the allergenic components of cod.
Methods Specific IgE to crude cod allergens in the sera of 179 atopic dogs, including 27 dogs with cod allergy, were measured using enzyme-linked immunosorbent assay (ELISA). The allergenic components of crude cod antigen were analyzed by ELISA, immunoblotting, and liquid chromatography-tandem mass spectrometry (LC-MS/MS). IgE reactivity to parvalbumin, collagen, and tropomyosin was evaluated using the sera of atopic dogs that were positive for specific IgE to crude cod allergens.
Results Specific IgE to crude cod allergens were present in 36 (20%) of the 179 atopic dogs and 12 (44%) of the 27 dogs with cod allergy. In allergen component analysis, IgE reactivity to tropomyosin and enolase was observed in the sera of dogs with cod allergy. Among the 36 dogs with IgE reactivity to crude cod extracts, 9 (25%), 14 (39%), and 18 (50%) dogs had specific IgE to parvalbumin, collagen, and tropomyosin, respectively.
Conclusions The dogs exhibited IgE reactivity to the cod allergen components similar to that observed in humans, providing support for the use of atopic dogs with fish allergy as a model for fish allergy in humans.

Figure 1

Figure 2
Figure 3
Figure 4
Figure 5
This is a list of supplementary files associated with this preprint. Click to download.
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