A recent study has shown that extracts of PJT are also effective against asthma by inhibiting ovalbumin (OVA)-induced allergies and by downregulating interleukin (IL)-5, IL-6, IL-13, inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) [18]. This evidence concerns the gene NOS2 and Allergy.