Safety, Tolerability, and Pharmacokinetics After Multiple Doses of Orally Inhaled DNAzyme Solution for Nebulisation in Healthy Male Subjects

Inclusion Criteria: * Subject has been informed both verbally and in writing about the objectives of the clinical trial, the methods, the anticipated benefits and potential risks and the discomfort to which he may be exposed, and has given written consent to participation in the trial prior to trial start and any trial-related procedure. * Healthy male Caucasian subject, aged between 18 and 45 years (inclusive), assessed as healthy based on a screening examination including medical history without clinically relevant pathologies, physical examination, vital signs, ECG assessment, pulmonary function testing, and clinical laboratory results. * Body weight according to a body mass index ≥18.0 and ≤29.0 kg/m2, and a body weight ≥60 and ≤90 kg. * Non-smokers or ex-smokers who had stopped smoking for at least 5 years prior to start of the clinical study. * Ability to inhale in an appropriate manner (Subjects will be trained to inhale using the AKITA2 APIXNEB® device with a placebo medication at the screening visit). * The subject must agree: * to use two methods of contraception in combination with his female partner, if she is of childbearing potential; this combination of contraceptive methods must be used from screening until at least 6 months after the last dose of IMP. At least one of the contraception methods must be a barrier contraception method. Contraceptive methods allowed include the following: condoms, diaphragm in combination with a spermicide, intrauterine device as well as for female partners oral contraception, contraception implants, OR * not to be sexually active at screening and accept using double-barrier contraception should he become sexually active during or within 6 months after the last dose of IMP, OR * to have been surgically sterilised prior to screening and accept to use a barrier method of contraception as well, OR * to have a partner who is post-menopausal and has had her last natural menstruation at least 24 months prior to screening, OR * to have a partner who has had a hysterectomy prior to screening, OR * to have a partner who has been surgically sterilised prior to screening All assessments will be performed within 2 to 14 days prior to first dose with the active compound or placebo. Exclusion Criteria: * History or current evidence of clinically relevant allergies or idiosyncrasy to any drug or food. * History of allergic reactions to any active or inactive component of the study medication. * Any history of allergic rhinitis or atopic disease. Subjects with total immunoglobulin E levels \>150 kU/L will be excluded. * History or current evidence of any clinically relevant pulmonary, cardiovascular, hepatic, renal, gastrointestinal, haematological, endocrinological, metabolic, neurological, or psychiatric disease within the last 2 years. * ECG abnormalities of clinical relevance (e.g., QTc according to Bazett's ≥440 ms, PR ≥210 ms; or QRS ≥120 ms). * Subjects with a resting heart rate between 50 bpm and 90 bpm (inclusive), systolic blood pressure between 100 mmHg and 140 mmHg (inclusive), diastolic blood pressure between 60 mmHg and 90 mmHg (inclusive). * Proneness to orthostatic dysregulation, fainting, or blackouts. * History or presence of any malignancy except for basalioma. * Abnormalities in clinical chemical or haematological variables considered medically relevant by the investigator. Values for total leukocytes and neutrophils, gamma-glutamyltranspeptidase, alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, lactate dehydrogenase, bilirubin, and serum creatinine should be within normal ranges. * Chronic or acute infections. * Positive results in any of the following virology tests: human immunodeficiency virus antibodies and antigen, Anti-hepatitis B-core antibody, hepatitis B surface antigen and anti-hepatitis C virus antibody. * Positive drug screen.