| Eligibility |
Inclusion Criteria:
1. Healthy subjects aged 18 to 45 years (inclusive) at Screening;
2. Weight = 50.0 kg (male) or = 45.0 kg (female), with a body mass index (BMI) between
19.0 and 28.0 (inclusive), BMI = weight (kg)/height (m)2;
3. Normal or abnormal but not clinically significant results in medical history, physical
examination, clinical laboratory tests and other relevant examinations as assessed by
the investigator at Screening;
4. Male or female subjects of childbearing potential must agree to use effective methods
of contraception during the study and within 6 months after the last dose of
investigational product (see section 5.4 for details), and male subjects should not
donate sperm during such period; female subjects should not donate ovum during such
period and should not be pregnant or lactating. Pregnancy period is defined as the
period from the date of conception until termination of pregnancy, and will be
determined by laboratory test of human chorionic gonadotropin (hCG) within 7 days
prior to initiation of the study;
5. Willing to participate in this study, understand the study procedures and sign the
informed consent form prior to screening; willing to comply with the study procedures.
Exclusion Criteria:
1. Past or current medical history of chronic or severe conditions in cardiovascular,
respiratory, blood, liver, kidney, gastrointestinal, endocrine or nervous systems;
2. Known or persistent mental disorders that may preclude the subject from participation
in the study, as determined by the investigator;
3. Past history of gastric or intestinal surgery, or other operations (except for
appendectomy) affecting the drug absorption;
4. Dysphagia and inability to take the investigational product orally;
5. Intolerant to venipuncture, difficult to collect blood samples, and fear of needle
sickness and blood;
6. Known allergy to two or more kinds of foods and drugs; or allergic to ABSK021 or its
excipients (lactose monohydrate, microcrystalline cellulose, colloidal silicon
dioxide, croscarmellose sodium, magnesium stearate, gelatin), allergic to omeprazole;
and prone to allergic reactions such as rash and urticaria;
7. History of bacterial, fungal, parasitic, viral (excluding nasopharyngitis),
mycobacterial infection, and COVID19 infection within 30 days prior to screening; or
abnormal chest X-ray finding, assessed as clinically significant (by the
investigator);
8. Symptoms of fatigue and pyrexia within 2 weeks prior to screening;
9. Abnormal laboratory tests: Alanine Aminotransferase (ALT) or Aspartate
Aminotransferase (AST) > 1 × ULN; Creatinine > 1 × ULN; Total Bilirubin (TBIL) > 1.5 ×
ULN; Creatine Kinase (CK) > 1.5 × ULN; amylase > 1 × ULN; Lactate Dehydrogenase (LDH)
> 1.5 × ULN; Serum Potassium < Lower Limit of Normal (LLN); and hemoglobin < LLN;
10. Positive result for either of the following tests: serum Hepatitis B Surface Antigen
(HBsAg), Hepatitis B e Antigen (HBeAg), Hepatitis B e Antibody (HBeAb), Hepatitis B
Core Antibody (HBcAb), Hepatitis C Virus (HCV) antibody, Human Immunodeficiency Virus
(HIV) antibody, and treponema pallidum antibody;
11. Pregnant or lactating women, or those with a positive pregnancy test;
12. Participated in any clinical studies of drugs as a study subject and received the
study drug within 3 months prior to screening;
13. Previously participated in any other study related to ABSK021 and received ABSK021;
14. Used strong inhibitors or inducers of CYP3A4 (including grapefruit juice, grapefruit
hybrids, punica granatum, carambola, citrus maxima, and Seville oranges [including its
juices or other processed products]; see Appendix 12.2Contraindicated Medications and
Products for Concomitant Use with ABSK021 or Omeprazole for the detailed list) within
14 days prior to screening and at Screening;
15. Used strong inhibitors or inducers of CYP2C19 (including Fluoxetine, Fluvoxamine,
Ticlopidine, Rifampin, etc., see Appendix 12.2 Contraindicated Medications and
Products for Concomitant Use with ABSK021 or Omeprazole for the detailed list) within
14 days prior to screening and at Screening;
16. Have special diet requirements and cannot accept to take a unified dietary; specific
dietary requirements: (i) the subjects can only eat the food provided by the study
site during hospitalization, (ii) the subjects should avoid using strong inhibitors or
inducers of CYP3A4 during the study, and (iii) the subjects should avoid using other
strong inhibitors or inducers of CYP2C19 during the study (see Appendix 12.2
Contraindicated Medications and Products for Concomitant Use with ABSK021 or
Omeprazole for the detailed list);
17. Consumption of more than 14 units of alcohol per week (1 unit of alcohol = about 360
mL of beer or 45 mL of spirits containing 40% alcohol or 150 mL of wine) within 3
months prior to signing the informed consent form, or a positive result for alcohol
breath test on the day pre-dose (breath alcohol content > 0.0 mg/100 mL), or unable to
abstain from alcohol during the study;
18. Consumption of more than 5 cigarettes per day within 3 months prior to signing the
informed consent form, or unable to abstain from tobacco products during the study;
19. Positive for nicotine test;
20. Previous chronic consumption of excessive amount of tea, coffee, or caffeinated
beverages (excessive intake is defined as taking more than 6 units of caffeine per
day, 1 unit of caffeine equivalent to 177 mL of coffee, 355 mL of tea, 355 mL of cola,
or 85 g of chocolate) or unable to abstain from caffeinated beverages during the
study;
21. Known history of drug abuse or positive for drug abuse screening test (morphine,
methamphetamine, ketamine, methylene dioxyamphetamine, and tetrahydrocannabinol acid);
22. Used over the counter or prescription drugs, including herbal medicine, health
products, vitamins, and dietary supplements, within 14 days prior to screening, or
plan to use such drugs during the study;
23. Donated or lost > 400 mL of blood within 3 months prior to screening; received blood
transfusions or used blood products within 2 months prior to screening;
24. Received vaccine (including COVID19 vaccine) within 2 months prior to screening, or
plan to get vaccinated during the study;
25. Significant abnormalities in vital signs, including: ear temperature > 37.7 °C; pulse
rate > 100 beats/min or < 50 beats/min; systolic blood pressure = 140 mmHg or < 90
mmHg, diastolic blood pressure = 90 mmHg or < 50 mmHg;
26. Heart rate-corrected QT interval prolongation, QTcF > 450 ms (> 470 ms for females)
(Note: QTc interval corrected using the Fridericia formula), or family history of long
QT syndrome, or other clinically significant ECG abnormalities at Screening;
27. Plan to donate sperm or ovum within 6 months after administration of the
investigational product;
28. Subjects involving in the design or conduct of this study and their immediate family
members (e.g., employees of Abbisko Therapeutics Co., Ltd., employees of the CRO, and
employees of the study site);
29. Subjects who, in the opinion of the investigator, are not suitable for enrollment or
may not be able to complete the study for other reasons.
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