A Study of CCX168 in Japanese and Caucasian Healthy Adult Males

The objectives of the study will be to investigate the safety and pharmacokinetics of a single oral administration and a twice-daily multiple oral administration of CCX168 in Japanese healthy adult males; and to compare the pharmacokinetics of a single oral administration and a twice-daily multiple oral administration of CCX168 between Japanese and Caucasian healthy adult males.


Eligibility Criteria:
Inclusion Criteria:

* Japanese and Caucasian healthy males aged 20 to 45 years inclusive (at the time of obtaining informed consent);
* Body Mass Index (body weight \[kg\]/squared height \[m\^2\]): 18.5 kg/m\^2 or more and less than 25 kg/m\^2 for Japanese males or between 18.5 and 29 kg/m\^2 for Caucasian males (at the time of screening visit);
* Body weight: 50 kg or more and less than 90 kg (at the time of screening visit).

Exclusion Criteria:

* Participants with any abnormal findings (e.g., clinical laboratory test values outside the reference range) during the physical examination and other tests (vital signs, 12-lead ECG and clinical laboratory tests) that are judged by the principal investigator or subinvestigator to be clinically significant;
* Participants who test positive for immunological tests (hepatitis B surface antigen, hepatitis C virus antibody, serological reaction of syphilis, and human immunodeficiency virus antigen and antibody);
* Participants with a history of drug allergy;
* Participants who are a habitual alcohol drinker with an average pure alcohol intake of over 40 g/day;
* Participants who test positive for abuse of phencyclidines, benzodiazepines, cocaine, stimulants, cannabis, morphine, barbiturates, and tricyclic antidepressants during urine drug testing;
* Male participant who do not agree to use adequate contraception for a period from a start of the investigational product administration to 12 weeks after the final administration of the investigational product;
* Participants with a QTcF intervals of 450 msec or greater in the 12-lead ECG at the time of the screening visit and/or Day -1;
* Participants who consumed tobacco or a nicotine patch/gum within 12 weeks prior to the investigational product administration;
* Participants who received other prescription medications or over-the-counter medications (including vitamins and energy drinks) within 2 weeks prior to the investigational product administration (excluding topical formulation that is not expected systemic action);
* Participants who received any supplements (Saint John's wort \[Hypericum perforatum\] etc.) that have been reported to affect the pharmacokinetics of concomitant use of drugs within 2 weeks prior to the investigational product administration;
* Participants who received a grapefruit and an orange that contain the component inhibiting CYP3A4 or the food and drink containing these fruits within 1 week prior to the investigational product administration;
* Participants who received other investigational products within 16 weeks prior to the investigational product administration;
* Participants who donated more than 200 mL of blood (donation of whole blood, plasma components or platelets, etc.) within 4 weeks or more than 400 mL within 16 weeks prior to the investigational product administration;
* Participants who performed excessive exercise with symptoms of fatigue or muscle pain within 1 week prior to the investigational product administration;
* Participants who are judged by the principal investigator or subinvestigator as inappropriate for inclusion in this study.