Phase 2b Safety and Efficacy Study of CGB-500 Topical Ointment With 0.5% and 1% Tofacitnib for Treatment of Atopic Dermatitis

An individual who meets any of the following criteria will be excluded from participation in this trial:

1. Females who are pregnant, breastfeeding, intending to be pregnant during the trial, or who do not agree to use an acceptable form of birth control during the trial if of childbearing potential .

2. Immunocompromised individuals as adjudicated by the principal investigator (PI) based on review of medical history.

3. Known hypersensitivity or previous allergic reaction to any constituent of the IP (e.g., tofacitinib or Janus kinase (JAK) inhibitors, essential oils, choline, phosphatidylcholine, glycerol, propylene glycol, polyethylene glycol).

4. Has clinically significant safety labs (hematology, chemistry, and urinalysis) at the Screening visit that, in the opinion of the investigator, would preclude participation in the study or affect proper assessment of the study endpoints

5. Skin infections (e.g., bacterial, fungal or viral) that can interfere with reliable AD assessments.

6. Basal cell carcinoma within 6 months prior to Baseline.

7. History of confounding skin conditions, e.g., psoriasis, rosacea, erythroderma, or ichthyosis or presence of Netherton's Syndrome, immunological deficiencies or diseases, HIV, uncontrolled diabetes, malignancy, or serious active or recurrent infection.

8. Known hepatic impairment or disorder and/or ALT and AST \>3X ULN at Screening.

9. Has unstable and impaired renal function with an estimated glomerular filtration rate (eGFR) \<60 mL/min using Cockcroft-Gault (C-G) equation (eGFR between 60 to \<90 mL/minute or higher is acceptable).

10. Use of moderate to strong CYP3A4 and CYP3A5 inhibitors (e.g. ritonavir, clarithromycin, itraconazole, erythromycin, fluconazole, verapamil, ketoconazole, nefazodone, nelfinavir, diltiazem, ciprofloxacin, grapefruit juice) within 4 weeks prior to Baseline.

11. Participants who have previously failed or had an inadequate response to oral, systemic or topical JAK inhibitors, including in a trial or under a prescription for atopic dermatitis (e.g., ruxolitinib, tofacitinib, baricitinib, filgotinib, lestaurtinib, pacritinib).

12. Participants who had an adequate response to JAK inhibitors will be excluded if the following are met:

1. Use within 2 weeks prior to Baseline of topical JAK inhibitors.

2. Use within 4 weeks prior to Baseline of systemic JAK inhibitors.

13. Use within 14 days prior to Baseline of: 1) systemic antibiotics, 2) calcipotriene or 3) retinoids.

14. Use within 7 days on the treatment area(s) prior to Baseline of: 1) topical antihistamines, 2) topical antibiotics, 3) topical corticosteroids or 4) other topical drug products.

15. Use of the following treatments prior to Baseline:

1. For 5 half-lives or 12 weeks (whichever is longer) - biologic agents (e.g., dupilumab).

2. For 4 weeks - systemic corticosteroids or adrenocorticotropic hormone analogs, cyclosporin, methotrexate, azathioprine, or other systemic immunosuppressive or immunomodulating agents (e.g., mycophenolate or tacrolimus).

3. For 2 weeks - UVA/UVB therapy, PUVA (psoralen plus ultraviolet) therapy, tanning booths, or non-prescription UV light sources.

4. For 2 weeks - immunizations and sedating antihistamines unless on long-term stable regimen (nonsedating antihistamines are permitted).

5. For 2 weeks - use of other topical treatments for atopic dermatitis (other than bland emollients). Diluted sodium hypochlorite "bleach" baths are allowed if they do not exceed 2 baths per week and their frequency remains the same throughout the trial.

16. Uncontrolled systemic disease.

17. Any serious illness or condition(s) that, in the opinion of the PI, would interfere with full participation in the trial, including administration of IP and attending required trial visits; pose a significant risk to the participant; or interfere with interpretation of trial data.

18. Foreseen unprotected and intense/excessive UV exposure during the trial.

19. Scheduled or planned surgical procedures during the trial.

20. Unable or unwilling to comply with any of the trial requirements.

21. Medical or psychiatric conditions, or a personal situation, that may increase the risk associated with trial participation or may interfere with interpretation of trial results or participant compliance and, in the opinion of the PI, makes the participant inappropriate for trial entry.

22. Clinically significant alcohol or drug abuse, or history of poor cooperation or unreliability.

23. Employees of the research center or Investigator.

24. Family of members of employees of the research center or Investigator.

25. Participants (e.g. siblings, spouses, relatives, roommates) residing in the same household cannot be enrolled at the same time.

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What this study is about