A Study of Intermittent Oral Dosing of ASP1517 in ESA-untreated Chronic Kidney Disease Patients With Anemia

The objective of this study is to evaluate the efficacy and the safety when ASP1517 is intermittently administered in Erythropoiesis Stimulating Agent (ESA)-untreated non-dialysis chronic kidney disease patients with anemia.


Eligibility Criteria:
Inclusion Criteria:

* Subjects who were diagnosed with non-dialysis chronic kidney disease (CKD) and who are considered not to require renal replacement therapy during the study period
* Mean of the subject's two most recent Hb values before randomization during the Screening Period must be \<10.5 g/dL with an absolute difference ≤1.3 g/dL between the two values
* Either transferrin saturation ≥ 5% or serum ferritin ≥ 30 ng/mL
* Female subject must either:

Be of non-childbearing potential:

* post-menopausal prior to pre-screening, or
* documented surgically sterile Or, if of childbearing potential,
* Agree not to try to become pregnant during the study after informed consent acquisition and for 28 days after the final study drug administration
* And have a negative urine pregnancy test at pre-screening
* And, if heterosexually active, agree to consistently use two forms of highly effective birth control (at least one of which must be a barrier method) starting at pre-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 pre-screening and throughout the study period, and for 28 days after the final study drug administration.
* Female subject must not donate ova starting at pre-screening and throughout the study period, and for 28 days after the final study drug administration.
* Male subject and their female spouse/partners who are of childbearing potential must be using two forms of highly effective birth control (at least one of which must be a barrier method) starting at pre-screening and continue throughout the study period, and for 12 weeks after the final study drug administration
* Male subject must not donate sperm starting at pre-screening and throughout the study period, and for 12 weeks after the final study drug administration

Exclusion Criteria:

* Concurrent retinal neovascular lesion requiring treatment and macular edema requiring treatment
* Concurrent autoimmune disease with inflammation that could impact erythropoiesis
* History of gastric/intestinal resection considered influential on the absorption of drugs in the gastrointestinal tract (excluding resection of gastric or colon polyps) or concurrent gastroparesis
* Uncontrolled hypertension
* Concurrent congestive heart failure (NYHA Class III or higher)
* History of hospitalization for treatment of stroke, myocardial infarction, or pulmonary embolism within 12 weeks before the pre-screening assessment
* Positive for hepatitis B surface antigen (HBsAg) or anti-hepatitis C virus (HCV) antibody at the pre-screening assessment, or positive for human immunodeficiency virus (HIV) in a past test
* Concurrent other form of anemia than renal anemia
* Having received treatment with ESA, protein anabolic hormone, testosterone enanthate, or mepitiostane within 6 weeks before the pre-screening assessment
* Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT) or total bilirubin that is greater than the criteria, or previous or concurrent another serious liver disease at pre-screening assessment
* Previous or current malignant tumor (no recurrence for at least 5 years is eligible.)
* Having undergone red blood transfusion and/or a surgical procedure considered to promote anemia within 4 weeks before the pre-screening assessment
* Having undergone a kidney transplantation
* History of serious drug allergy including anaphylactic shock
* Having a previous history of treatment with ASP1517
* Participation in another clinical study or post-marketing clinical study (including that of a medical device) within 12 weeks before informed consent acquisition