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Development and IND-enabling studies of a novel Cas9 genome-edited autologous CD34+ cell therapy to induce fetal hemoglobin for sickle cell disease [CHANGE-seq]

ABSTRACT: To define the genome-wide activity of Cas9-sgRNA directed at the gamma-globin promoter genes, we performed CHANGE-seq and identified 678 off-target sites from plerixafor-mobilized normal donors of African American ancestry (pre-GMP engineering runs, n = 3). Most of these off-targets are in intergenic and intronic regions of the human genome, as expected based on their relative genomic proportions. We selected the 277 CHANGE-seq candidate sites reproducibly identified in 2 or more biological donors and in silico predicted sites for multiplexed targeted amplicon sequencing (rhAmp-seq, IDT).

ORGANISM(S): Homo sapiens

PROVIDER: GSE277176 | GEO | 2024/09/14

REPOSITORIES: GEO

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Development and IND-enabling studies of a novel Cas9 genome-edited autologous CD34+ cell therapy to induce fetal hemoglobin for sickle cell disease

Project description:This SuperSeries is composed of the SubSeries listed below.

2024-08-21 | GSE275158 | GEO

Development and IND-enabling studies of a novel Cas9 genome-edited autologous CD34+ cell therapy to induce fetal hemoglobin for sickle cell disease

Project description:To determine the genome-wide spectrum and persistence of genomic rearrangements, we applied UniDirectional Targeted Sequencing (UDiTaS) in edited normal donor CD34+ HSPCs. At day 5 and 14 post-electroporation, no reproducible translocations or structural genomic re-arrangements were identified.

2024-09-14 | GSE277175 | GEO

Development and IND-enabling studies of a novel Cas9 genome-edited autologous CD34+ cell therapy to induce fetal hemoglobin for sickle cell disease [sgRNA]

Project description:To identify potential single-guide RNA (sgRNAs) contaminants in the GMP HBG-sgRNA, we performed SMARTer smRNA-sequencing (Takara). 80.79% of the 5' spacer sequence perfectly matched the targeting sgRNA sequence and no evidence of contaminants sgRNAs that could target other genomic regions.

2024-08-21 | GSE275157 | GEO

Development and IND-enabling studies of a novel Cas9 genome-edited autologous CD34+ cell therapy to induce fetal hemoglobin for sickle cell disease [scRNA]

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The Sickle Cell Disease Ontology: enabling universal sickle cell-based knowledge representation.

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| S-EPMC6878945 | biostudies-literature

GMP Manufacturing and IND-Enabling Studies of a Recombinant Hyperimmune Globulin Targeting SARS-CoV-2.

Project description:Conventionally, hyperimmune globulin drugs manufactured from pooled immunoglobulins from vaccinated or convalescent donors have been used in treating infections where no treatment is available. This is especially important where multi-epitope neutralization is required to prevent the development of immune-evading viral mutants that can emerge upon treatment with monoclonal antibodies. Using microfluidics, flow sorting, and a targeted integration cell line, a first-in-class recombinant hyperimmune globulin therapeutic against SARS-CoV-2 (GIGA-2050) was generated. Using processes similar to conventional monoclonal antibody manufacturing, GIGA-2050, comprising 12,500 antibodies, was scaled-up for clinical manufacturing and multiple development/tox lots were assessed for consistency. Antibody sequence diversity, cell growth, productivity, and product quality were assessed across different manufacturing sites and production scales. GIGA-2050 was purified and tested for good laboratory procedures (GLP) toxicology, pharmacokinetics, and in vivo efficacy against natural SARS-CoV-2 infection in mice. The GIGA-2050 master cell bank was highly stable, producing material at consistent yield and product quality up to >70 generations. Good manufacturing practices (GMP) and development batches of GIGA-2050 showed consistent product quality, impurity clearance, potency, and protection in an in vivo efficacy model. Nonhuman primate toxicology and pharmacokinetics studies suggest that GIGA-2050 is safe and has a half-life similar to other recombinant human IgG1 antibodies. These results supported a successful investigational new drug application for GIGA-2050. This study demonstrates that a new class of drugs, recombinant hyperimmune globulins, can be manufactured consistently at the clinical scale and presents a new approach to treating infectious diseases that targets multiple epitopes of a virus.

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IND-Enabling Studies for a Clinical Trial to Genetically Program a Persistent Cancer-Targeted Immune System.

Project description:PurposeTo improve persistence of adoptively transferred T-cell receptor (TCR)-engineered T cells and durable clinical responses, we designed a clinical trial to transplant genetically-modified hematopoietic stem cells (HSCs) together with adoptive cell transfer of T cells both engineered to express an NY-ESO-1 TCR. Here, we report the preclinical studies performed to enable an investigational new drug (IND) application.Experimental designHSCs transduced with a lentiviral vector expressing NY-ESO-1 TCR and the PET reporter/suicide gene HSV1-sr39TK and T cells transduced with a retroviral vector expressing NY-ESO-1 TCR were coadministered to myelodepleted HLA-A2/Kb mice within a formal Good Laboratory Practice (GLP)-compliant study to demonstrate safety, persistence, and HSC differentiation into all blood lineages. Non-GLP experiments included assessment of transgene immunogenicity and in vitro viral insertion safety studies. Furthermore, Good Manufacturing Practice (GMP)-compliant cell production qualification runs were performed to establish the manufacturing protocols for clinical use.ResultsTCR genetically modified and ex vivo-cultured HSCs differentiated into all blood subsets in vivo after HSC transplantation, and coadministration of TCR-transduced T cells did not result in increased toxicity. The expression of NY-ESO-1 TCR and sr39TK transgenes did not have a detrimental effect on gene-modified HSC's differentiation to all blood cell lineages. There was no evidence of genotoxicity induced by the lentiviral vector. GMP batches of clinical-grade transgenic cells produced during qualification runs had adequate stability and functionality.ConclusionsCoadministration of HSCs and T cells expressing an NY-ESO-1 TCR is safe in preclinical models. The results presented in this article led to the FDA approval of IND 17471.

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Efficacy and immunogenicity of MultiTEP-based DNA vaccines targeting human α-synuclein: prelude for IND enabling studies.

Project description:Accumulation of misfolded proteins such as amyloid-β (Aβ), tau, and α-synuclein (α-Syn) in the brain leads to synaptic dysfunction, neuronal damage, and the onset of relevant neurodegenerative disorder/s. Dementia with Lewy bodies (DLB) and Parkinson's disease (PD) are characterized by the aberrant accumulation of α-Syn intracytoplasmic Lewy body inclusions and dystrophic Lewy neurites resulting in neurodegeneration associated with inflammation. Cell to cell propagation of α-Syn aggregates is implicated in the progression of PD/DLB, and high concentrations of anti-α-Syn antibodies could inhibit/reduce the spreading of this pathological molecule in the brain. To ensure sufficient therapeutic concentrations of anti-α-Syn antibodies in the periphery and CNS, we developed four α-Syn DNA vaccines based on the universal MultiTEP platform technology designed especially for the elderly with immunosenescence. Here, we are reporting on the efficacy and immunogenicity of these vaccines targeting three B-cell epitopes of hα-Syn aa85-99 (PV-1947D), aa109-126 (PV-1948D), aa126-140 (PV-1949D) separately or simultaneously (PV-1950D) in a mouse model of synucleinopathies mimicking PD/DLB. All vaccines induced high titers of antibodies specific to hα-Syn that significantly reduced PD/DLB-like pathology in hα-Syn D line mice. The most significant reduction of the total and protein kinase resistant hα-Syn, as well as neurodegeneration, were observed in various brain regions of mice vaccinated with PV-1949D and PV-1950D in a sex-dependent manner. Based on these preclinical data, we selected the PV-1950D vaccine for future IND enabling preclinical studies and clinical development.

| S-EPMC8748802 | biostudies-literature

Intradermal skin test with mRNA vaccines as a surrogate marker of T cell immunity in immunosuppressed patients

Project description:The role of T cell immunity in protection against COVID-19 in immunocompromised patients (ICp) who failed to mount serological responses remains ill-defined. Intradermal skin test (IDT) with mRNA vaccines may represent a simple, reliable and affordable tool to measure T cell response in seronegative patients.We compared anti-SARS-CoV-2 antibodies and cellular responses in vaccinated ICp (n=58), healthy seronegative naive controls (NC, n=8), and healthy seropositive vaccinated controls (VC, n=32) by Luminex, spike-induced IFN-γ ELIPSOT and an IDT 3 to 6 months after vaccination. ICp regrouped 18 transplant recipients, 33 individuals with autoimmune diseases, and eight patients with primary immunodeficiencies. In three vaccinated volunteers, we performed a skin biopsy 24h after IDT and single-cell RNAseq of the skin-infiltrating CD45+ cells. Twenty-five percent of seronegative NC had a positive ELIPSOT (2/8) and IDT (1/4), compared to 95% (20/21) and 93% (28/30) in seropositive VC, respectively. Single-cell RNA seq data of positive IDT consistently showed a mixed population of helper and cytotoxic T cells composed of memory T cells in 87%. The TCR repertoire of infiltrating skin lymphocytes revealed 18/1218 clonotypes with known specificities against SARS-CoV-2, among which six were spike-specific. Seronegative ICp with positive Elispot and IDT were in the majority treated with B cell-depleting reagents only, while those with negative IDT were all transplant recipients. Our results indicate that local reaction to IDR is mainly composed of memory T cells and includes SARS-CoV-2-specific T cells, opening the perspective to use IDT as a correlate of protection in immunosuppressed patients.

2023-06-14 | GSE224028 | GEO

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