The open reading frame of human cyclooxygenase-2 was cloned by pcr amplification of IL-1 beta stimulated human dermal fibroblast cDNA. The coding region was used to construct a recombinant baculovirus which when used to infect Sf9 cells directed the expression of recombinant human cyclooxygenase-2. The heterologously expressed enzyme was characterized and found to display all salient features of cyclooxygenase. Large-scale microsomal preparations of infected cells yielded more than 20 units of enzyme with a specific activity of 240 nmoles prostaglandin product/mg protein.
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