An object of the invention is to provide a non-human animal which can be utilized as a model animal well exhibiting a pathological condition of low-turnover type of osteoporosis and chronic obstructive pulmonary disease, for screening therapeutic agents for osteoporosis or therapeutic agents for chronic obstructive pulmonary disease, etc. The invention includes a non-human animal, wherein a gene coding for CD9 and a gene coding for CD81 are deficient at least in somatic cells; and a method to use the non-human animal as an osteoporosis model animal, including a step of measuring the degree of inhibition in the osteogenesis, and a method to use the non-human animal as a chronic obstructive pulmonary disease model animal, including a step of measuring the degree of a phenotype similar to chronic obstructive pulmonary disease.

 
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