This is a Phase 1, first in human (FIH), double-blind, placebo-controlled, single ascending dose (SAD) trial to assess the safety, tolerability, and pharmacokinetics (PK) of intravenously (IV) or subcutaneously (SC) injected ALIA-1758 in healthy male and female participants.

Key Inclusion Criteria:

• Participants must understand the nature of the trial and must provide signed and dated written informed consent in accordance with local regulations before the conduct of any trial-related procedures.
• Healthy as determined by the Investigator, based on a medical evaluation including medical history, physical examination, laboratory tests and electrocardiogram (ECG) recording. A participant with a clinical abnormality or laboratory parameters outside the reference range for the population being studied may be included only if, in the opinion of the Investigator, the finding is (a) unlikely to introduce additional risk to the participant, (b) will not interfere with trial procedures or confound trial results, and (c) is not otherwise exclusionary (see Exclusion Criteria).
• Body weight of at least 50.0 kg for men and 45.0 kg for women and Body Mass Index (BMI) within the range of 17.5-32.0 kg/m2 (inclusive) at Screening.

Key Exclusion Criteria:

• A history or presence of a clinically significant hepatic, biliary, renal, gastrointestinal, cardiovascular, endocrine, pulmonary, ophthalmologic, immunologic, hematologic, dermatologic, psychiatric, neurologic abnormality, or chronic urinary tract infections.
• A clinically significant abnormality on physical examination, ECG, or laboratory evaluations at Screening or between Screening and (first) dose administration.
• The participant is, in the opinion of the Investigator or Medical Monitor, unlikely to comply with the protocol or is unsuitable for any reason.

Other criteria may apply