Investigations into the possible role of IL-17A in the contractility of SMCs of other organs, such as the uterus, blood vessels, urinary bladder and so forth, may open a new approach to treatment of diseases related to abnormal contractility of SMCs e.g., hypertension, asthma, pollakiuria, subarachnoid hemorrhage and threatened abortion. The gene discussed is IL17A; the disease is hypertensive disorder.