Specific Antibody

Client case: Development of a Novel Antibody Drug Targeting IL-25 for Atopic Dermatitis(AD).

Client: A pharmaceutical company developing a new antibody targeting the IL-25 pathway for the treatment of AD

Objective: To establish the efficacy and safety of the new anti-IL-25 antibody in preclinical models of atopic dermatitis, compared to a standard positive control drug.

Methodology:

1. Selection of Appropriate AD Model: Considering the client‘s in-depth knowledge of the IL-25 pathway and AD pathogenesis, an MC903-induced AD mouse model is chosen for its ability to mimic key aspects of human AD pathology and cytokine profile.

2. Choice of Positive Control Drug: Crisaborole is selected as the positive control due to its established efficacy in alleviating AD symptoms and modulating immune responses.

Experimental Design:

- Animals are divided into four groups: Normal group, Vehicle group, Positive control group (Crisaborole), Anti-IL-25 antibody low-dose group, and high-dose group.

- The treatment duration is set at 3 weeks, administered topically to mimic local therapy.

Evaluation Parameters:

Clinical Assessment: The severity of dermatitis, erythema, and itching are evaluated using a standardized scoring system.

Skin Tissue Analysis: Histological examination of skin biopsies for epidermal hyperplasia, inflammatory cell infiltration, and cytokine expression levels.

Molecular Profiling: Analysis of key inflammatory mediators and immune cell populations in the skin at the molecular level, focusing on IL-25 downstream signaling pathways.

Pathological Analysis: Assessment of skin barrier function, keratinocyte proliferation, and pro-inflammatory cytokine expression within skin lesions.

Outcome:

- Results show that the anti-IL-25 antibody group displays a significant reduction in clinical symptoms, inflammatory cell infiltration, and cytokine expression compared to both the Vehicle and Positive control groups, indicating the superior efficacy of the anti-IL-25 antibody in treating atopic dermatitis.

Conclusion:

Through comprehensive evaluation at clinical, cellular, molecular, and pathological levels, the novel anti-IL-25 antibody demonstrates promising therapeutic potential for atopic dermatitis, representing a significant advancement in the field of dermatology.