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The humanized recombinant anti-CD6 monoclonal antibody Injection (T1h) has been approved for psoriasis in India. The first trial in China is to evaluate the tolerability, safety, pharmacodynamic, pharmacokinetics and preliminary efficacy of T1h for patients with psoriasis.

The humanized recombinant anti-CD6 monoclonal antibody (T1h) is developed whose ligand binding properties of the original murine monoclonal antibody are preserved on the CD6 molecule. T1h monoclonal antibody has been approved for clinical studies of autoimmune diseases in Cuba and India, such as psoriasis and rheumatoid arthritis (RA).

Single and multiple dose based tolerability, safety and pharmacokinetic phase 1 Study of Humanized Anti-CD6 Monoclonal Antibody Injection in Chinese patients with psoriasis, 40 patients are enrolled. They are divided into 4 groups (0.2mg/kg, 0.4mg/kg, 0.8mg/kg, 1.6mg/kg) and each group includes 10 patients. First, these doses are all single-dose administration gradually from low then the doses 0.4mg/kg, 0.8mg/kg and 1.6mg/kg are multi-dose administration gradually from low.

Inclusion Criteria:

1. Age ranged from 18 to 55 years, males or females ( no less than 3 patients in each dose group)

2. Patients with chronic plaque psoriasis for at least 6 months (until patients with an informed consent) with or without arthritis psoriasis

3. BSA≥3% or PASI≥10

4. PGA≥3

5. Patients were eligible if wash-out period was no less than the time as follows:

   • 2 weeks for topical retinoic acid or glucocorticoid therapy
   • 6 months for retinoic acid of this kind drugs therapy
   • 2 weeks for light therapy
   • 4 weeks for Psoralen combined with UV-A therapy
   • 4 weeks for methotrexate(MTX),cyclophosphamide,cyclosporine and other immunosuppressive therapy
   • 7 half life time periods for other systemic immunosuppressive therapy
   • 8 weeks for Biological agents for psoriasis therapy

6. Fertile males or females who are willing to adopt contraceptive methods (e.g. hormonal pitch, intrauterine device, condoms)

7. Patients were voluntary to sign a written informed consent.

Exclusion Criteria:

1. The females were pregnant, or lactating or showed positive urine pregnancy reaction during screening.
2. Patients with erythroderma or pustular psoriasis.
3. Patients receiving glucocorticoid systemic drug therapy.
4. Patients previously or currently suffered from autoimmune disease (e.g., rheumatoid arthritis, systemic lupus erythematosus, inflammatory bowel disease, scleroderma, inflammatory myopathy, mixed connective tissue disease, overlap syndrome ), or suffering from primary or secondary immunodeficiency or human immunodeficiency virus
5. Patients with any active infection (nail bed induced fungal infections were excluded), chronic infections, and tuberculosis history.
6. Patients with severe heart disease, heart failure, asthma, chronic obstructive pulmonary disease or neuropsychiatric diseases.
7. Patients previously or currently suffered from tumors including solid tumors, hematologic malignancies and carcinoma in situ.
8. Patients with positive tests for hepatitis B surface antigen (HBsAg), hepatitis C serology (HCV-Ab) or human immunodeficiency virus (HIV-Ab)
9. Patients with Hemoglobin < 90 g/L, white blood cell count <3.5 × 10^9 / L, neutrophil count <1.5 × 10^9 / L, or platelet count <80 × 10^9 / L
10. Patients with more than doubled serum cereal third transaminase(ALT )and glutamic-oxaloacetic transaminase(AST) as the upper limit of the reference value or serum creatinine values were above the upper limit of the reference.
11. Patients with a history of drug abuse or alcoholism
12. Patients were allergic to a recombinant biologic agent or any component of proteins derived from murine
13. Patients with surgery within three months or any planned surgery or laser skin treatment within six months
14. Patients received any vaccination within 28 days
15. Patients received any experimental drug treatment within three months
16. Patients were not suitable determined by researchers