a study of single and multiple oral doses of tollb-001

Conditions: Rheumatoid Arthritis

Summary: the primary objective is to evaluate the safety and tolerability of tollb-001 following the administration of single or multiple oral doses in healthy adult subjects

this is a phase i, randomized, double-blind, placebo-controlled study to evaluate the safety, tolerability, pk, and pd of single or multiple dose(s) of tollb-001 administered orally in healthy adult subjects and the food effect on the pk of a single dose of tollb-001 with a randomized, open-label and two-period crossover design. this study includes three parts. part a: single ascending dose (sad) study; part b: multiple ascending dose (mad) study; and part c: fe study.

Eligibility criteria:
inclusion criteria: 1. healthy male and female subjects between the age of 18 and 45 (both inclusive) when signing the informed consent form (icf) 2. able to give a signed written icf (the consent form must be signed by the subject prior to any study-specific procedures); have a full understanding of the study content, procedures, and possible aes; and be willing and able to comply with study procedures and follow-up examinations 3. body mass index (bmi, weight \[kg\]/height2 \[m2\]) within 19.0-26.0 kg/m2 (both inclusive), with total body weight \> 50 kg for male subjects and \> 45 kg for female subjects. 4. the subjects must be willing to use efficient physical contraception methods with a contraceptive failure rate of\<1% with their reproductive age partners within 90 days from signing the icf to the last administration of the investigational drug (such as condoms , intrauterine devices) 5. male subjects must also be willing to refrain from donating sperm for 90 days from the first administration of the investigational drug to the last administration of the investigational drug 6. results of vital signs, physical examination, laboratory examinations, abdominal and urinary b-ultrasound, 12-lead ecg, and other examination are normal or abnormal but not clinically significant. qt interval corrected for heart rate according to fridericia's formula (qtcf) must be within the following ranges: qtcf ≤ 450 msec for male subjects, and qtcf ≤ 470 msec for female subjects. assessment may be repeated if deemed appropriate by the investigator. 7. ability to swallow all imps. exclusion criteria: subjects were excluded if they meet any of the following exclusion criteria: 1. known or suspected allergy or hypersensitivity to any component of tollb-001, known allergic constitution or allergy to two or more foods or drugs. 2. severe gastrointestinal diseases, such as patients who have undergone major gastrointestinal surgery that would potentially alter absorption and/or excretion of orally administered drugs (except for cholecystectomy, appendectomy, hernia repair), or medical history of ulcer, gastrointestinal bleeding, gastritis, etc. 3. history or clinical manifestations of any clinically significant gastrointestinal, gallbladder or biliary tract, renal, urologic, pulmonary, neurological, cardiovascular, endocrinological, hematological, immunologic, dermatologic, metabolic disorder, or psychiatric disease (as determined by the investigator). 4. current or chronic history of liver disease or known hepatic ,or clinically significant of biliary abnormalities , or clinically significant abnormal results of liver function test at screening, including alanine amino transferase (alt) or/and aspartate aminotransferase (ast) \> 1.5 × upper limit of normal (uln)or/and total bilirubin \> uln. 5. egfr \< 90 ml/min/1.73 m2 calculated using the chronic kidney disease epidemiology collaboration (ckd-epi) equation at screening or on day-1. 6. current or history of clinically significant cardiac arrhythmias (symptomatic or asymptomatic). 7. serious infection within 3 months prior to dosing or symptoms of infection within 7 days before dosing, including acute and chronic infections and local infections (bacterial, viral, parasitic, fungal, or other opportunistic pathogens), which is inappropriate to participant as deemed by the investigator. 8. major illness or surgery within 3 months before dosing ,or planned surgery during the study period. 9. intolerance to venipuncture. 10. participation in any clinical study or received any other investigational product or device within 4 weeks prior to the first dose or 5 times the half-life of the specific drug/biologics(whichever is longer), or plan to take an investigational agent during the study. 11. donated blood \> 400 ml or significant blood loss (equivalent to 400 ml), or received blood transfusion within 3 months of prior to screening, or have plans to donate blood during the study. 12. history of malignancy within 5 years prior to screening (excluding non-melanoma skin cancer that has been resected). 13. positive results of any of the following tests at screening: serum hepatitis b surface antigen (hbsag), hepatitis c virus (hcv rna or hcv antibodies \[ab\]), human immunodeficiency virus 1 and 2 (hiv)ab, or treponema pallidum (tp) ab. 14. active tuberculosis (tb) infection indicated by chest radiography orγ-interferon at screening or within 3 months prior to screening. tb test positive, or active or latent tb infection as discretion of the investigator according to clinical practice, or history of tb, or currently receiving treatment for this disease. 15. plans to receive administration of any live vaccine within 4 weeks before dosing or up to 30 days after the last dose of imp. 16. use of drugs, including prescription, over-the-counter medications herbal products, vitamins, and minerals, within 2 weeks prior to the first dose or within 5 times the elimination half-life of the medication prior to first dosing（whichever is longer）. 17. participated in strenuous exercise from 48 hours prior to day-1 . 18. unwilling to refrain from any food or beverage containing caffeine or producing xanthine after metabolism (e.g., tea, coffee, chocolate, cola, red cattle) from 24 hours prior to day -1 and during the study. 19. use of food or beverages likely to influence liver metabolism, within 14 days prior to the first dose of the imp (e.g., star fruit, pomelos, grapefruit, and seville oranges). use of any drugs or nutrients known to modulate cytochrome p450 (cyp) 1a2, 2b6, 2c8, 2c9, 2c19, 2d6, 3a and transporter oatp1b1,1b3, oat3, oct2 activity (refer to appendix 3) or any strong or moderate inhibitors or inducers ofcyp1a2, bcrp, oatp1b1, oatp1b3, and oat3 (refer to appendix 4) starting from 14 days priorto dose administration on day 1. 20. history of significant alcohol abuse within 6 months prior to screening or use of more than 14 units of alcohol per week (1 unit = 360 ml of beer or 45 ml of alcohol 40% or 150 ml of wine) within 90 days prior to screening or alcohol breath test \>0.0mg/100ml at screening, or unwilling to refrain from consumption of alcohol during the study. 21. use of tobacco or nicotine products or smoking within 90 days (more than 5 cigarettes per day) prior to screening and unwilling to refrain from 24 hours prior to day -1 and during the study. 22. drug abuse or those who have taken drugs (such as cocaine, phencyclidine, etc.) within one year prior to screening (consultation); or those who are positive for urine drug abuse screening (methamphetamine, ketamine, mdma ,tetrahydrocannabinoid acid, morphine) during screening. 23. women who are lactating or positive pregnancy test within at screening or during the study period, or planning to become pregnant during the study period. 24. acute illness occurs or concomitant medication required from screening to dosing. 25. constipated or irregular bowel movements. 26. any other situation that researchers believe may affect the subject's ability to provide informed consent or follow the trial protocol, or the subject's participation in the trial may affect the trial results or their own safety.