A Study to Evaluate the Safety, Tolerability and Pharmacokinetics Profile of MT101-5 in Healthy Volunteers

Inclusion Criteria: Subjects will be eligible for enrollment in the study only if they meet ALL of the following criteria: 1. Age: * SAD \& Food Interaction: Healthy male and female subjects, 18 to 45 years of age, inclusive. * MAD: Elderly healthy male and female subjects ≥ 65 years of age 2. BMI: * SAD \& Food Interaction: The subject has a body mass index (BMI) of 18.0 to 30.0 kg/m2, inclusive, and weighs at least 50 kg. * MAD: The subject has a body mass index (BMI) of 18.0 to 32.0 kg/m2, inclusive, and weighs at least 50 kg. 3. The subject is in good health and has no medical condition of clinical significance or that may impact the outcome of the study, as determined by the investigator (as determined by medical history, physical examination, 12-lead electrocardiogram \[ECG\], vital signs, and clinical laboratory results at screening). 4. The subject is able to understand the nature of the study and any potential hazards associated with participating in it. 5. The subject is able to communicate satisfactorily with the investigator and to participate in, and comply with, the requirements of the study. 6. The subject is willing to provide written informed consent to participate in the study after reading the informed consent form and the information provided and has had the opportunity to discuss the study with the investigator or designee. 7. Negative pregnancy test for female subjects of childbearing potential. Women of childbearing potential (WOCBP) and Women of non-childbearing potential are eligible to participate. Both women of childbearing potential and women of non-childbearing potential should use an approved method of birth control and agrees to continue to use this method for the duration of the study (and for 90 days after taking the last dose of MT101-5). Acceptable methods of contraception include abstinence, female subject/partner's use of hormonal contraceptive (oral, implanted, or injected) in conjunction with a barrier method (e.g., diaphragm, cervical cap, male condom, and female condom and spermicidal foam, sponges, and film) (WOCBP only), female subject/partner's use of an intrauterine device (IUD), or if the female subject/partner is surgically sterile at least three months before screening (confirmed by study doctor) or 2 years post-menopausal (patient reported) confirmed with FSH/estradiol levels at screening. All male subjects/partners must agree to consistently and correctly use a condom for the duration of the study and for 90 days after taking the study drug. In addition, subjects may not donate sperm for the duration of the study and for 90 days after taking study drug. Exclusion Criteria: Subjects will be eligible for enrollment in the study only if they meet NONE of the following criteria: 1. The subject has a history of severe allergic or anaphylactic reactions. 2. The subject has a known allergy or hypersensitivity to any component of the formulation. 3. The subject has a medical history or current evidence of any clinically significant (as determined by the investigator) cardiac, endocrine (including diabetes), hematologic, hepatobiliary (abnormal alanine aminotransferase \[ALT\], aspartate aminotransferase \[AST\], gamma-glutamyl transpeptidase \[GGT\], or total bilirubin), immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, or renal condition, or other major disease. 4. The subject has a history of any malignant disease. 5. The subject has a history of more than one herpes zoster episode or multimetameric herpes zoster. 6. The subject has a history of an opportunistic infection (e.g. cytomegalovirus, pneumocystis carinii, aspergillosis, clostridium difficile). 7. The subject has a history of or ongoing chronic or recurrent infectious disease (e.g. infected indwelling prosthesis, osteomyelitis, chronic sinusitis). 8. The subject has had major trauma or surgery in the 2 months before screening or at any time between screening and check-in. 9. The subject has had an acute infection within 2 weeks before screening or at any time between screening and check-in including, but not limited to, history, signs, or symptoms of a common cold (e.g., mild rhinorrhea), untreated oral/dental abnormalities (e.g. untreated dental caries as determined by examination of the mouth), or untreated disruption of the skin. 10. The subject has clinically significant abnormal ECG findings at screening, check-in visits, or predose, as determined by the Investigator. 11. The subject has a supine blood pressure measurement outside the ranges of the below at screening, check-in, or predose. Note: If either value is out of the range, blood pressure measurements may be repeated in the supine position at intervals of 5 to 10 minutes up to 3 times. If the mean systolic or diastolic measurement continues to exceed the stated limits, the subject will be excluded. 1. SAD: Ranges 90 to 140 mm Hg systolic or 45 to 90 mm Hg diastolic (measured after a rest of at least 5 minutes) 2. MAD: Ranges 90 to 150 mm Hg systolic or 45 to 95 mm Hg diastolic (measured after a rest of at least 5 minutes) 12. The subject has a pulse of fewer than 45 beats per minute (bpm) or greater than 100 bpm (measured after a rest of at least 5 minutes) at screening, check-in, or predose. 13. The subject tests positive for tuberculosis (TB) at screening by the QuantiFERON-TB Gold Test, or has a history of latent, inadequately treated, or active TB. 14. The subject has a known history of, or a positive test result for, hepatitis B surface antigen (HBsAg), hepatitis C virus (HCV), or human immunodeficiency virus (HIV) types 1 or 2 at screening. 15. The subject has used prescription or over-the-counter (OTC) medication (other than ≤2 g/day paracetamol \[acetaminophen\] or ≤800 mg/day ibuprofen), vitamins, or herbal remedies, within 2 weeks or 5 half-lives before study drug administration, whichever is longer. 16. The subject has participated in another clinical study of a new investigational drug or has received an investigational drug within the 3 months or 5 half-lives (if available) before study drug administration, whichever is longer. 17. The subject has had a loss of more than 400 mL of blood (e.g. a blood donation) within 2 months before study drug administration, or has received any blood, plasma, or platelet transfusions within 3 months before check-in, or plans to donate blood during the study or within 3 months after the study. 18. The subject has a history of alcohol abuse (defined as an alcohol intake more than 21 units per week) or a history of drug abuse within the 6 months before study drug administration, or a history of substance abuse deemed significant by the investigator. A unit of alcohol is defined as 240 mL of beer, 120 mL of wine, or 1 single shot of spirits. The subject will be required to abstain from alcohol consumption 48 hours prior to screening or check-in. 19. Current smokers and those who have smoked within the last 2 years. This includes the use of cigarettes, e-cigarettes, and nicotine replacement products. 20. The subject has a positive test for alcohol or drugs of abuse (barbiturates, methamphetamine, benzodiazepines, morphine/opiates, phencyclidine (PCP), amphetamines, tetrahydrocannabinol (THC), methylenedioxymethamphetamine (MDMA), cocaine, methadone, and cotinine) at screening or check-in. 21. The subject is unable to participate in, or successfully complete, the study, in the opinion of their general practitioner or the investigator, because the subject is any of the following: 1. mentally or legally incapacitated, or unable to give consent for any reason 2. in custody due to an administrative or a legal decision, or under tutelage, or being admitted to a sanitarium or social institution 3. unable to be contacted in case of emergency 4. unlikely to cooperate or comply with the clinical study protocol or is unsuitable for any other reason