A Study of MA-0217 (ASP1128) in Healthy Adult Subjects and Healthy Elderly Subjects

The primary purpose of this study is to evaluate the safety and tolerability of single ascending intravenous doses of ASP1128 in healthy adult male and female subjects and multiple ascending intravenous doses of ASP1128 in healthy adult male and female subjects and healthy elderly male and female subjects.

This study will also evaluate the pharmacokinetics and the effect on the QT interval using Fridericia's correction formula (QTcF) in these subjects.

After a screening period of up to 28 days prior to study drug administration, eligible participants will be residential for a single period of 5 days/4 nights in Part 1: single ascending dose, and 11 days/10 nights in Part 2 multiple ascending dose.

Part 1 is composed of 6 parallel cohorts (cohorts 1.1 to 1.6) and up to 2 optional cohorts (cohorts 1.7 and 1.8) of 8 healthy adult male and female subjects in each cohort. If the data from cohorts 1.1 to 1.6 are not sufficient to characterize safety, tolerability and pharmacokinetics, up to 2 optional cohorts (cohorts 1.7 and 1.8) may be added.

Part 2 is composed of 4 parallel cohorts (cohorts 2.1 to 2.4) and 1 optional cohort (cohort 2.5) of 12 healthy adult male and female subjects in each cohort and 1 cohort (cohort 2.6) of 12 healthy elderly male and female subjects. Dosing of the elderly cohort (cohort 2.6) will commence after having established the safety and tolerability of the corresponding dose tested in cohorts 2.1 to 2.5. If the data from cohorts 2.1 to 2.4 are not sufficient to characterize safety, tolerability and pharmacokinetics, 1 optional cohort (cohort 2.5) may be added.

Eligibility Criteria:
Inclusion Criteria:

* For adult subjects (cohorts 1.1 to 1.8 and cohorts 2.1 to 2.5):

  * Subject is a healthy adult male or female subject 18 to 55 years of age, inclusive at screening.
  * Subject has a body mass index (BMI) range of 18.5 to 32.0 kg/m\^2, inclusive and weighs at least 50 kg at screening.
* For elderly subjects (cohort 2.6):

  * Subject is a healthy elderly male or female subject ≥ 65 years of age at screening.
  * Subject has a BMI range of 18.5 to 32.0 kg/m\^2, inclusive and weighs at least 50 kg at screening.
* Subject is considered an adult according to local regulation at the time of signing informed consent.
* Female subject must either be of nonchildbearing potential:

  * Postmenopausal (defined as at least 1 year without any menses for which there is no other obvious pathological or physiological cause) prior to screening, or
  * Documented surgically sterile (e.g., hysterectomy, bilateral salpingectomy or bilateral oophorectomy), OR, if of childbearing potential:
  * Agree not to try to become pregnant during the study and for 28 days after the final study drug administration
  * Have a negative blood pregnancy test at screening and a negative urine pregnancy test on day -1
  * If heterosexually active, agree to consistently use 1 form of highly effective birth control starting at screening and throughout the study period and for 28 days after the final study drug administration
* Female subject must agree not to breastfeed starting at screening and throughout the study period and for 28 days after the final study drug administration.
* Female subject must not donate ova starting at screening and throughout the study period and for 28 days after the final study drug administration.
* A sexually active male subject with female partner(s) who is(are) of childbearing potential is eligible for the study if:

  * Agree to use a male condom starting at screening and continue throughout study treatment and for 28 days after the final study drug administration.
  * If the male subject has not had a vasectomy or is not sterile, their female partner(s) is(are) utilizing 1 form of highly effective birth control starting at screening and continue throughout study treatment and for 28 days after the male subject receives their final study drug administration.
* Male subject must not donate sperm starting at screening and throughout the study period and for 28 days after the final study drug administration.
* Male subject with a pregnant or breastfeeding partner(s) must agree to remain abstinent or use a condom for the duration of the pregnancy or time partner(s) is(are) breastfeeding throughout the study period and for 28 days after the final study drug administration.
* Subject agrees not to participate in another interventional study while participating in the present study.

Exclusion Criteria:

* Subject has received investigational drug within 28 days or 5 half-lives, whichever is longer, prior to screening.
* Subject has any condition which makes the subject unsuitable for study participation.
* Female subject who has been pregnant within 6 months prior to screening or breastfeeding within 3 months prior to screening.
* Subject has a known or suspected hypersensitivity to ASP1128 or any components of the formulation used.
* Subject has had previous exposure with ASP1128.
* Subject has unsuitable or difficult venous access to support the intravenous infusion(s) and/or required blood draws.
* Subject has any of the liver function tests (LFTs; aspartate aminotransferase \[AST\], alanine aminotransferase \[ALT\], alkaline phosphatase \[ALP\], gamma-glutamyl transferase and total bilirubin \[TBL\]) above the upper limit of normal (ULN) at screening or on day -1. In such a case, the assessment may be repeated once.
* Subject has total creatine kinase (CK) \> 1.5 × ULN or cardiac troponin I above the ULN at day -1.
* Subject has any clinically significant history of allergic conditions (including drug allergies, asthma, eczema, or anaphylactic reactions, but excluding untreated, asymptomatic, seasonal allergies) prior to study drug administration.
* Subject has any history or evidence of any clinically significant cardiovascular, gastrointestinal, endocrinologic, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, renal and/or other major disease or malignancy.
* Subject has/had febrile illness or symptomatic, viral, bacterial (including upper respiratory infection), or fungal (noncutaneous) infection within 1 week prior to day -1.
* Subject has any clinically significant abnormality following the physical examination, electrocardiogram (ECG) and protocol-defined clinical laboratory tests at screening or on day -1.
* Subject has a mean pulse \< 45 or \> 90 bpm; mean systolic blood pressure (SBP) \> 140 mmHg; mean diastolic blood pressure (DBP) \> 90 mmHg (measurements taken in triplicate after subject has been resting in the supine position for at least 5 minutes; pulse will be measured automatically) at screening or on day -1. For elderly subjects the following criteria apply: SBP \> 160 mmHg, DBP \> 100 mmHg. If the mean blood pressure exceeds the limits above, 1 additional triplicate can be taken.
* Subject has a mean QT interval using Fridericia's correction formula (QTcF) interval of \> 430 msec (for males) and \> 450 msec (for females) at screening or on day -1. If the mean QTcF exceeds the limits above, 1 additional triplicate ECG can be taken.
* Subject has used any prescribed or nonprescribed drugs (including vitamins, natural and herbal remedies, e.g., St. John's Wort) in the 2 weeks prior to study drug administration, except for occasional use of acetaminophen (up to 2 g/day), hormonal contraceptives and hormone replacement therapy.
* Subject has used any peroxisome proliferator-activated receptor (PPAR) ligands such as fibrates and thiazolidinediones, including self-medication obtained via the internet, in the 4 weeks prior to study drug administration.
* Subject has smoked or has used tobacco-containing products and nicotine or nicotine-containing products in the past 6 months prior to screening.
* Subject has a history of consuming \> 14 units of alcoholic beverages per week within 6 months prior to screening or has a history of alcoholism or drug/chemical/substance abuse within past 2 years prior to screening (Note: 1 unit = 12 ounces of beer, 4 ounces of wine or 1 ounce of spirits/hard liquor) or the subject tests positive for alcohol or drugs of abuse (amphetamines, barbiturates, benzodiazepines, cannabinoids, cocaine and opiates) at screening or on day -1.
* Subject has used any drugs of abuse (amphetamines, barbiturates, benzodiazepines, cannabinoids, cocaine and opiates) within 3 months prior to day -1.
* Subject has used any inducer of metabolism (e.g., barbiturates and rifampin) in the 3 months prior to day -1.
* Subject has had significant blood loss, donated ≥ 1 unit (450 mL) of blood or received a transfusion of any blood or blood products within 60 days or donated plasma within 7 days prior to day -1.
* Subject has a positive serology test for hepatitis B surface antigen (HBsAg), hepatitis B core (HBc) antibodies, hepatitis A virus (HAV) antibodies (immunoglobulin M \[IgM\]), hepatitis C virus (HCV) antibodies or antibodies to human immunodeficiency virus (HIV) type 1 and/or type 2 at screening.
* Subject is an employee of Astellas, Mitobridge or designated contract research organization (CRO).