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Scinai Immunotherapeutics Ltd. (Nasdaq: SCNI), a biopharmaceutical company focused on the development of inflammation and immunology biological products, is pleased to announce today successful preclinical trial results of its innovative anti-IL-17 VHH antibody (‘NanoAb’) as a local treatment for the large and underserved population of mild to moderate plaque psoriasis.

The study, conducted by Genoskin, a pioneering French biotechnology company, aimed to evaluate the anti-inflammatory effects of Scinai’s NanoAbs. Genoskin’s proprietary human skin models were induced for expression of plaque psoriasis symptoms to enable ex vivo examination of the therapeutic effects of drugs targeting underlying mechanisms in the pathogenesis of plaque psoriasis, particularly the IL-17 family of pro-inflammatory cytokines. This disease-induced skin model reproduces key features of plaque psoriasis tissue morphology as well as the cytokine profile associated with the inflammatory state of plaque psoriasis lesions. Genoskin’s model has been successfully validated as a reliable ex-vivo system for testing drugs aimed at plaque psoriasis.

The trial’s study groups included intradermal injections in two dosage schedules of Scinai’s anti-IL-17 NanoAbs, which were compared to Cosentyx® (a leading monoclonal anti-IL-17A antibody treatment for severe psoriasis), Betamethasone (a topically applied corticosteroid used treatment for mild to moderate psoriasis), an unrelated VHH NanoAb, and an untreated control. The anti-inflammatory effect of Scinai’s NanoAbs was evaluated by measuring cytokine levels secreted by the skin tissues, including IL-17 family cytokines. Additionally, the skin’s structure, integrity, and viability were assessed by a histological analysis.

The statistically significant results demonstrated the potential for Scinai’s anti-IL-17 NanoAbs to noticeably improve psoriatic skin lesions as indicated by skin viability and structural integrity. This finding was corroborated by cytokine release analysis, which showed significantly reduced IL-17 release (p<0.001) as compared to the untreated control, similar to the effects of Betamethasone and Cosentyx. These results were further supported by histopathology results demonstrating improved skin structure following a single dose, which appeared more efficient than Betamethasone in reducing inflammation-induced skin and at least as efficient as Cosentyx.

The results confirm and build upon previously reported results indicating that Scinai’s anti-IL-17 NanoAbs downregulated key molecular markers overexpressed in plaque psoriasis in a 3D scaffold of skin cells, a model mimicking a skin tissue.

Dr. Tamar Ben-Yedidia, Scinai’s Chief Scientist, noted, “These positive results mark a significant step forward in the development of a novel treatment for the undertreated segment of mild and moderate plaque psoriatic patients. To date, most of the innovation related to treatment of autoimmune diseases focused on drugs aimed at the more severe cases of these diseases, leaving milder cases with generic topical drugs and phototherapy treatments. The mild psoriatic patients account for more than 50% of the plaque psoriatic patients and while undertreated they are prone to disease deterioration and worsening of symptoms, mainly painful skin lesions. Scinai’s vision is to become the ‘Botox-like solution’, providing a highly efficacious, specific, and safe biologic for local treatment of plaque psoriasis lesions.”

“I’d like to thank the Genoskin team for their professional collaboration,” continued Ben-Yedidia.

Scinai next intends to conduct an in-vivo proof of concept animal study in early 2024 in collaboration with the prestigious Technion Israel Institute of Technology complemented by a pre-clinical toxicology study before commencing a first-in-human clinical trial in late 2024. Scinai is excited about the potential of its compounds and looks forward to further advancements in this field.

About IL-17’s Role in Psoriasis

IL-17 plays a major role in the development of plaque psoriasis and is the molecular target of several biological treatments, mainly monoclonal antibodies (mAbs), which mostly target pro-inflammatory cytokines or their receptors in the skin tissue. Cosentyx (Novartis, NYSE: NVS) and Taltz (Lilly, NYSE: LLY), are examples of mAbs that target the cytokine IL-17 in its IL-17A isoform and are provided to patients with moderate to severe psoriasis. Research shows that targeting the IL-17F isoform in addition to IL-17A provides higher efficacy in treating plaque psoriasis. The recently launched Bimzelx (UCB, Euronext Brussels: UCB) was the first mAb targeting both IL-17A and F to be approved by the European Medicines Agency (EMA). MoonLake Immunotherapeutics (Nasdaq: MLTX) is also developing a VHH antibody (nanobody) targeting both IL-17A and F. Last year, MoonLake reported superior results vs. Cosentyx in a phase 2 plaque psoriasis clinical trial. All the above-mentioned antibodies indicated only for moderate to severe plaque psoriasis patients, are administered by subcutaneous injection for systemic drug distribution and carry the risk of considerable side effects. These drugs are also expensive and require chronic, injections, each at a cost of several thousand dollars. Mild psoriasis, which accounts for more than 50% of plaque psoriatic patients, unfortunately, has no safe and affordable biological drug available. Experience shows that even 28% of patients with moderate plaque psoriasis tend to avoid or delay the onset of these biological treatments due to the associated risks and costs.

Conversely, Scinai’s NanoAbs are designed to be administered locally to the dermis and are engineered to degrade in a way that should prevent systemic side effects. Results of this recent study suggest the potential for a highly efficacious, specific, yet safer and more convenient treatment for the large and underserved population of mild to moderate plaque psoriasis patients.

About Scinai’s NanoAbs

Scinai’s NanoAbs are alpaca-derived recombinant variable domains of heavy-chain-only antibodies and are also known as nanobodies or VHH antibodies. Scinai’s pipeline of NanoAbs is being discovered by and licensed out of the prestigious Max Planck Society and the University Medical Center Göttingen (UMG), both in Germany. By leveraging their unique attributes, Scinai’s NanoAbs are designed to overcome the limitations of existing antibody therapies to create therapeutics that address large and underserved patient populations. Scinai believes that its NanoAbs exhibit potential for several distinct advantages over current leading monoclonal antibody treatments, such as broader safety, effectiveness at very low doses, more convenient routes of administration such as inhalation and intra-dermal injection, and efficient manufacturing and supply chain. These attributes sit at the foundation of Scinai’s strategy aimed at the milder yet undertreated and underserved cases of autoimmune diseases.

Scinai’s NanoAb development pipeline includes anti-IL-17 NanoAbs for the treatment of autoimmune diseases such as psoriasis, psoriatic arthritis, and Hidradenitis Suppurativa (HS). In addition, Scinai holds a five-year research collaboration agreement with Max Planck and UMG to discover and characterize additional NanoAbs aimed at molecular targets such as IL-13, IL-4, IL-4Ra, and TSLP for the treatment of asthma and atopic dermatitis and Ang-2 and VEGF for the treatment of age-related wet macular degeneration. Scinai holds an exclusive option for an exclusive license for each of the NanoAbs discovered through this research collaboration. The pipeline approach affords Scinai considerable flexibility concerning partnering and spinning out assets, opening enhanced potential to generate income through license fees, milestone payments, and royalties, in return for participation in associated R&D costs.

Scinai has previously demonstrated the potential of its NanoAbs as therapeutically viable molecules in COVID-19 animal studies. These studies showed that Scinai’s inhaled COVID-19 NanoAb therapy resulted in significantly milder and shorter illness, virtually eliminated the virus from the lungs, and even protected against illness when administered prophylactically. The studies also demonstrated Scinai’s ability to manufacture NanoAbs in-house and to successfully deliver NanoAbs via inhalation, a difficult yet desirable route of administration for antibody drugs.

About Scinai Immunotherapeutics

Scinai Immunotherapeutics Ltd. (Nasdaq: SCNI) is a biopharmaceutical company with two complementary business units, one focused on the in-house development of inflammation and immunology (I&I) biological products beginning with an innovative, de-risked, pipeline of nanosized VHH antibodies (NanoAbs) targeting diseases with large unmet medical needs, and the other a boutique CDMO providing services to help biotech companies efficiently bring their products to market by leveraging Scinai’s drug development and GMP and non-GMP manufacturing capabilities for pre-clinical and clinical studies.

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Company Contact: Joshua Phillipson  +972 8 930 2529        joshua.phillipson AT

Source: Jan 12, 2023,


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