A Phase I Study of AK159 in Healthy Postmenopausal Women

The objective of this study is to investigate the pharmacokinetics, safety, and tolerability of AK159 administered to healthy postmenopausal women.

This study consists of two parts: Part 1 and Part 2. The Part 1 is a single-center, randomized, 2-way crossover study that investigates the pharmacokinetics, safety, and tolerability of teriparatide after a single dose of AK159 (5 levels) and estimates the relative bioavailability of AK159 with subcutaneous teriparatide acetate in healthy post-menopausal women.

The Part 2 is a multiple-center, randomized, double-blind, positive- and placebo-controlled, parallel study that compares the pharmacokinetics, bone makers, safety, and tolerability of teriparatide after a weekly doses of AK159 (4 levels) for 6 weeks with placebo and a weekly doses of subcutaneous teriparatide acetate in healthy post-menopausal women.

Inclusion Criteria:

• Healthy postmenopausal ethnic Japanese women
• At least 45 years of age at the time consent is obtained
• Give voluntary consent in writing with a sufficient understanding of the study.

Exclusion Criteria:

• Clinical abnormality identified in the laboratory tests
• Weight < 40.0 kg
• Body mass index < 17.5 or >=30.5
• History of disease of the kidneys, liver, heart, brain, or other organ that makes them ineligible as subjects
• Previously received radiation treatment potentially affecting bone
• Clinical abnormality identified in the 12-lead ECGs performed at the study center during the screening period
• Systolic blood pressure < 90 mmHg
• Serum calcium level exceeding 10.4 mg/dL
• History of contact dermatitis or skin disease potentially compromising study evaluation
• Used drugs which impact bone metabolism in the 8-week period preceding investigational product administration
• Used a bisphosphonate
• Used a teriparatide product