News Release Details
Rocket Pharmaceuticals Announces Preliminary Data from Phase 1/2 Trial of RP-L201 for Leukocyte Adhesion Deficiency-I
Dec 9, 2019
- Initial Data Demonstrated Robust CD18 Expression and Resolution of Disease-Mediated Lesions in Months After Gene Therapy Treatment -
“We believe the preliminary data from this first patient are impressive and demonstrate that RP-L201 has the potential to correct deficient CD18 expression that is the hallmark of LAD-I,” said Jonathan Schwartz, M.D., Chief Medical Officer and Senior Vice President of Rocket. “In LAD-I, stem cells are not believed to be compromised by the underlying disorder. Based on this, and an established RP-L201 treatment process that includes a tailored conditioning regimen, we intend to create a standardized and predictable platform for reversing LAD-I. We believe this treatment approach will enable us to reliably correlate drug product to both early and long-term patient outcomes. We look forward to continued evaluation of this first-in-class gene therapy in the ongoing trial and believe that RP-L201 has the potential to be a favorable therapeutic option for this difficult and frequently fatal disease.”
Initial results from the first pediatric patient treated with RP-L201 demonstrate early evidence of safety and potential efficacy. Analyses of peripheral vector copy number (VCN) and CD18-expressing neutrophils were performed through three months after infusion of RP-L201 to evaluate engraftment and phenotypic correction. The patient exhibited early signs of engraftment with myeloid-lineage VCN levels of 1.5 at three months and CD18 expression of 45%, compared to pre-treatment CD18 expressions of <1%. The patient also displayed visible improvement of multiple disease-related skin lesions after receiving therapy. The drug product VCN was 3.8. No safety or tolerability issues related to RP-L201 administration (or investigational product) have been identified to-date. These data are consistent with Rocket’s preclinical studies, which demonstrated that administration of RP-L201 in murine models resulted in stable engraftment and phenotypic correction with restored neutrophil migration capability.
The non-randomized open-label Phase 1/2 study of RP-L201 is designed to evaluate the safety and efficacy of RP-L201 in pediatric patients with severe LAD-I and is expected to enroll nine patients globally. The Phase 1 portion of the trial is expected to enroll two patients and will assess the safety, tolerability and preliminary efficacy of RP-L201. The Phase 2 portion of the trial will evaluate overall survival at several leading U.S. and EU centers. RP-L201 was in-licensed from the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) and Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD). The lentiviral vector was developed in a collaboration between
About Leukocyte Adhesion Deficiency-I
Severe Leukocyte Adhesion Deficiency-I (LAD-I) is a rare, autosomal recessive pediatric disease caused by mutations in the ITGB2 gene encoding for the beta-2 integrin component CD18. CD18 is a key protein that facilitates leukocyte adhesion and extravasation from blood vessels to combat infections. As a result, children with severe LAD-I (less than 2% normal expression) are often affected immediately after birth. During infancy, they suffer from recurrent life-threatening bacterial and fungal infections that respond poorly to antibiotics and require frequent hospitalizations. Children who survive infancy experience recurrent severe infections including pneumonia, gingival ulcers, necrotic skin ulcers, and septicemia. Without a successful bone marrow transplant, mortality in patients with severe LAD-I is 60-75% prior to the age of 2 and survival beyond the age of 5 is uncommon. There is a high unmet medical need for patients with severe LAD-I.
Rocket’s LAD-I research is made possible by a grant from the
Rocket Cautionary Statement Regarding Forward-Looking Statements
Various statements in this release concerning Rocket's future expectations, plans and prospects, including without limitation, Rocket's expectations regarding the safety, effectiveness and timing of product candidates that Rocket may develop, to treat Fanconi Anemia (FA), Leukocyte Adhesion Deficiency-I (LAD-I), Pyruvate Kinase Deficiency (PKD), Infantile Malignant Osteopetrosis (IMO) and Danon disease, and the safety, effectiveness and timing of related pre-clinical studies and clinical trials, may constitute forward-looking statements for the purposes of the safe harbor provisions under the Private Securities Litigation Reform Act of 1995 and other federal securities laws and are subject to substantial risks, uncertainties and assumptions. You should not place reliance on these forward-looking statements, which often include words such as "believe," "expect," "anticipate," "intend," "plan," "will give," "estimate," "seek," "will," "may," "suggest" or similar terms, variations of such terms or the negative of those terms. Although Rocket believes that the expectations reflected in the forward-looking statements are reasonable, Rocket cannot guarantee such outcomes. Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors, including, without limitation, Rocket's ability to successfully demonstrate the efficacy and safety of such products and pre-clinical studies and clinical trials, its gene therapy programs, the pre-clinical and clinical results for its product candidates, which may not support further development and marketing approval, the potential advantages of Rocket's product candidates, actions of regulatory agencies, which may affect the initiation, timing and progress of pre-clinical studies and clinical trials of its product candidates, Rocket's and its licensors’ ability to obtain, maintain and protect its and their respective intellectual property, the timing, cost or other aspects of a potential commercial launch of Rocket's product candidates, Rocket's ability to manage operating expenses, Rocket's ability to obtain additional funding to support its business activities and establish and maintain strategic business alliances and new business initiatives, Rocket's dependence on third parties for development, manufacture, marketing, sales and distribution of product candidates, the outcome of litigation, and unexpected expenditures, as well as those risks more fully discussed in the section entitled "Risk Factors" in Rocket's Quarterly Report on Form 10-Q for the quarter ended
Claudine Prowse, Ph.D.
SVP, Strategy & Corporate Development