Clinical 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 Part 1 and Part 2. <Part 1> Part 1 will be conducted according to a single-centre, randomized, single-dose, 3-period, 5-treatment alternating crossover design in two groups of healthy post-menopausal women The pharmacokinetics, safety, and tolerability of a single dose of AK159 (4 levels) will be investigated versus teriparatide acetate for injection as a control.

<Part 2> Part 2 will be conducted according to a multiple-centre, randomized, double-blind, placebo-controlled, repeated dose parallel design of healthy post-menopausal women The pharmacokinetics, safety, and tolerability of AK159 (4 levels) for 8 weeks will be investigated versus teriparatide acetate for injection and placebo as controls. Pharmacokinetics, safety, and tolerability following long-term application will also be investigated.

Inclusion Criteria:

• Healthy postmenopausal ethnic Japanese women; At least 45 years of age at the time consent is obtained; and 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
• Systolic blood pressure < 90 mmHg
• QTc exceeds 470 msec in a 12-lead electrocardiography
• 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;