New In Vitro Method Complement Low-value Existing In Vitro Method in Commercial Dog Diets in the Republic of Korea
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This study aimed to develop the in vitro method using domestic commercial diets to estimate nutrient digestibility in dogs. The existingin vitro method were tested and compared with literature data to develop new in vitro method. The development of in vitro methodprogressed as follows: modification of pepsin solution to an activated form and supplementation with 1% lipase. All the in vitro methodprogressed to 4 hours of stomach simulation and 2 hours of small intestine simulation. In vivo digestibility was measured using thesame diets as beagle dogs. The supplementation of lipase methods showed significantly improved (p < 0.05) DM, OM, and EE thanthe existing and modified pepsin solution methods. The correlation between in vitro and in vivo data in DM, OM, and EE digestibilitywas high (r2 = 0.889, 0.907, and 0.721, respectively), and the correlation between in vitro and in vivo data in CP and GE digestibilitywas medium (r2 = 0.681 and 0.536, respectively). The current in vitro method is similar to in vivo digestibility and helps potentiallypredict digestibility for dogs. In conclusion, this developed in vitro method suggests that it can help estimate the nutrient digestibilityof dogs' diets without in vivo experiments.
Abstract
This study aimed to develop the in vitro method using domestic commercial diets to estimate nutrient digestibility in dogs. The existingin vitro method were tested and compared with literature data to develop new in vitro method. The development of in vitro methodprogressed as follows: modification of pepsin solution to an activated form and supplementation with 1% lipase. All the in vitro methodprogressed to 4 hours of stomach simulation and 2 hours of small intestine simulation. In vivo digestibility was measured using thesame diets as beagle dogs. The supplementation of lipase methods showed significantly improved (p < 0.05) DM, OM, and EE thanthe existing and modified pepsin solution methods. The correlation between in vitro and in vivo data in DM, OM, and EE digestibilitywas high (r2 = 0.889, 0.907, and 0.721, respectively), and the correlation between in vitro and in vivo data in CP and GE digestibilitywas medium (r2 = 0.681 and 0.536, respectively). The current in vitro method is similar to in vivo digestibility and helps potentiallypredict digestibility for dogs. In conclusion, this developed in vitro method suggests that it can help estimate the nutrient digestibilityof dogs' diets without in vivo experiments.
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