Safety and Efficacy Study of PA9159 Nasal Spray for the Treatment of Seasonal Allergic Rhinitis

PA9159 is a highly potent novel corticosteroid. The purpose of this study is to evaluate the safety, efficacy and characteristics of population pharmacokinetics of multiple dosing of PA9159 Nasal Spray in patients with seasonal allergic rhinitis.

This is a multicenter, randomized, double-blind, parallel, placebo-controlled clinical trial. Subjects of 200 with seasonal allergic rhinitis are planned to be included in this study. With a ratio of 1: 1: 1: 1 to be randomized allocated to receive PA9159 Nasal Spray of 10 μg, 20 μg, and 40 μg, or placebo, with 50 subjects in each group. The duration of this study is approximately 12 months, including screening, baseline, treatment observation, and follow-up.

Eligibility Criteria:
Inclusion Criteria:

* Age ≥ 12 years, male or female;
* Clinical diagnosis is based on the Chinese Guidelines for the Diagnosis and Treatment of Allergic Rhinitis (2018 Edition) issued by the Rhinology Group of the Otorhinolaryngology Head and Neck Surgery Branch of the Chinese Medical Association, with a clear history of Seasonal Allergic Rhinitis (SAR) ≥ 1 year (written or verbal confirmation), and positive test for one or more allergens before randomization. Recognize the results of any one of the skin prick test (SPT), intradermal test, and serum specific IgE test; Clinical manifestations may include:

  1. Symptoms: 2 or more symptoms such as sneezing, runny nose, itchy nose and nasal congestion, lasting or accumulating for more than 1 h each day, may be accompanied by ocular symptoms such as itching, lacrimation, and red eyes;
  2. Signs: pallor and edema of the nasal mucosa and watery nasal secretions;
  3. Allergic symptoms are characterized by seasonal onset in spring and/or fall, and at the time of this enrollment, it is during the onset of symptoms.
* Reflective Total Nasal Symptom Score (rTNSS) ≥ 6 points, nasal congestion ≥ 2 points, and one of the three symptoms of sneezing, runny nose and itchy nose ≥ 2 points, all these three conditions are met simultaneously at the time of screening, baseline and the first dosing during treatment; The mean rTNSS at baseline was the mean of a total of 8 scores on evening of D-4, morning and evening of D-3, D-2 and D-1, and the morning of D1;
* Capable of demonstrating the correct use of nasal spray techniques after training at screening;
* Capable of performing respiratory exercise as required at the time of intranasal administration after training at screening;
* Is willing to sign the informed consent form (ICF), comply with the study procedures, including the correct use of the nasal spray device, and understand and accurately record the patient diary card; Ability to understand and receive treatment, laboratory tests, and other study procedures as planned.

Exclusion Criteria:

* Previous intolerance to intranasal administration;
* Patients with asthma requiring long-term treatment (patients with occasional acute asthma, or mild, exercise-induced asthma requiring no medication or only beta-agonist treatment during the study may be included);
* Active or inactive tuberculosis infection, untreated local or systemic fungal, bacterial, viral, or parasitic infection;
* Presence of glaucoma, cataract, ocular herpes simplex, infectious conjunctivitis, or other ocular infections (except allergic conjunctivitis);
* Any nasal mucosal erosion, septal ulceration, or nasal septal perforation at screening or prior to the first dose on D1;Presence of other nasal disorders that may affect intranasal drug deposition as judged by the investigator, such as acute or chronic sinusitis, drug-induced rhinitis, nasal polyps, or nasal septal deviation;
* History with sinus surgery within 3 months or nasal trauma that have not completely healed;
* Respiratory tract infections treated with antibiotics within 4 weeks prior to screening;
* Patients with severe lung diseases, such as COPD (chronic obstructive pulmonary disease), etc.;
* Patients with unstable heart disease with drug-control;
* Patients who have received desensitization therapy within 6 months prior to screening;
* Severe liver and kidney disease, or abnormal liver and kidney function tests (ALT, AST ≥ 2 times the upper limit of normal, or Cr \> 1.2 times the upper limit of normal);
* Use of short-lasting prescriptions and OTC antihistamines within 3 days prior to screening; Use of nasal glucocorticoids within four weeks; Inhalation, oral, intramuscular/intravascular injection, topical hormones (except hydrocortisone cream containing ≤ 1%) within 8 weeks prior to screening; Use of nasal or ophthalmic cromoglycic acid within 14 days prior to screening; Use of long-lasting antihistamines such as loratadine, desloratadine, fexofenadine, or cetirizine within 10 days prior to screening; Oral or nasal decongestants, nasal anticholinergics, or oral antileukotrienes within 72 h prior to screening; Use of Omalizumab subcutaneously within 5 months prior to screening; Use of anti-allergic Chinese herbal medicines within 14 days prior to screening.
* Planned use of the following medications or/and treatments during the study: a. Strong CYP3A4 inhibitors, such as ketoconazole, clarithromycin, etc.; b. Chronic or intermittent use of inhaled, oral, intramuscular, intravenous, and/or potent topical corticosteroids; c. Antihistamines (except salvage medications required during the trial); d. Leukotriene modulators; e. Mast cell membrane stabilizers (including cromoglycate sodium, nidolate sodium, tetrazolone, nedocromil sodium, pemirolast potassium, and tranilast, etc.); f. Decongestants; g. Anticholinergics; h. Immunotherapeutic agents; i. Anti-allergic Chinese herbal medicine;
* Planned to travel outside the local area for 2 consecutive days (48 h) or a total of more than 3 days during the trial;
* Alcohol addicts in the previous 1 year (alcoholism defined as: greater than 14 units of alcohol per week;1 unit of alcohol ≈ 360 mL of beer or 45 mL of spirits or 150 mL of wine containing 40% alcohol), drug abusers, drug addicts, or smoking addicts (average of more than 10 cigarettes per day);
* Allergic to the investigational drug and its excipients;
* Pregnant or lactating women, and male subjects (or their partners) or female subjects who have a pregnancy plan throughout the trial and for 3 months after the end of the study;
* Participated in other drug clinical trials within 3 months prior to screening, and used the study drug;
* Based on the judgment of the investigator, the subject may have an impact on compliance with any aspect of the protocol (including visit plan and completion of diary cards or questionnaires) due to physical, educational level, or geographic location;
* Based on the opinion of the investigator, there are any circumstances that may affect the subject's informed consent or compliance with the protocol, or that the subject's participation in the trial may affect the results of the study or their own safety.