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Immune System Diseases

Hemic and Lymphatic Diseases

Neoplasms

Enzyme

Biosimilar

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Disease Domain	Count

Hemic and Lymphatic Diseases	1
Immune System Diseases	1
Neoplasms	1

Top 5 Drug Type	Count

Biosimilar	1
Enzyme	1

Top 5 Target	Count

ASN(Asparagine)	1

A Phase 1 Randomized, Observer-Blind, Active- and Placebo-Controlled Dose Comparison, Safety, Tolerability and Immunogenicity Study of Intranasal Adjuvanted Anthrax Vaccine (BW-1010; rPA + 20%W805EC) in Healthy Adult Volunteers Administered by Nasal Sprayer and Pipette With an Additional Unblinded Positive Control Arm

The purpose of this clinical trial is to evaluate the safety and immunogenicity of BW-1010.
BW-1010 is a nanoemulsion adjuvanted recombinant protein (rPA) that would protect against fatal outcome resulting from exposure to anthrax.
The vaccine will be administered intranasally (IN) to healthy adults, age 18 - 49.
The study will be conducted in 84 volunteers in one center in the United States.
The study will compare 2 different dose levels of rPA (50µg and 100µg rPA), and 2 different administration methods (a sprayer and dropper) with a negative control (saline) and a positive control (the injectable BioThrax licensed vaccine).
The vaccines and negative controls will be administered in 2 IN doses (4 weeks apart). The positive control will be 3 subcutaneous doses, 2 weeks apart. All volunteers will be observed for 1 year after the last dose.
Immunological outcome studied will be from the serum, blood cells and nasal washes.

Start Date08 Jan 2020

Sponsor / Collaborator

BlueWillow Biologics, Inc.

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100 Clinical Results associated with Porton Biopharma Ltd.

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0 Patents (Medical) associated with Porton Biopharma Ltd.

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15

Literatures (Medical) associated with Porton Biopharma Ltd.

01 Feb 2022·Investigational New DrugsQ3 · MEDICINE

Improved pharmacokinetic and pharmacodynamic profile of a novel PEGylated native Erwinia chrysanthemi L-Asparaginase

Q3 · MEDICINE

Article

Author: Gervais, David ; Modi, Tapasvi

SummaryIntroduction. Erwinase® (native Erwinia chrysanthemi L-Asparaginase (nErA)) is an approved second-line treatment for acute lymphoblastic leukaemia (ALL) in children and adolescents, who develop hypersensitivity or neutralising antibodies to E.coli derived L-Asparaginases (ASNases). However, nErA has a short in vivo half-life requiring frequent dosing schedules in patients. In this study, nErA was covalently conjugated to PEG molecules with the aim of extending its half-life in vivo. Methods. Firstly, efficacy of this novel product PEG-nErA was investigated on human ALL cell lines (Jurkat, CCRF-CEM and CCRF-HSB2), in vitro. Secondly, its pharmacokinetic (PK) and pharmacodynamic (PD) characteristics were determined, in vivo (12 rats in each group). Results. It was found that the specific activity (U/mg of enzyme) and the kinetic constant (KM) of nErA remained unaltered post PEGylation. PEG-nErA was shown to have similar cytotoxicity to nErA (IC50: 0.06–0.17 U/mL) on human ALL cell lines, in vitro. Further, when compared to nErA, PEG-nErA showed a significantly improved half-life in vivo, which meant that L-Asparagine (Asn) levels in plasma remained depleted for up to 25 days with a four-fold lower dose (100 U/kg) compared with 72 h for nErA at 400 U/kg dose. Conclusion. Overall, this next generation product PEG-nErA (with improved PK and PD characteristics compared to nErA) would bring a significant advantage to the therapeutic needs of ALL patients and should be further explored in clinical trials.

01 Feb 2022·Journal of Pharmaceutical and Biomedical Analysis

l-Asparaginase and HCP quantification by SWATH LC-MS/MS for new and improved purification step in Erwinia chrysanthemi l-asparaginase manufacture

Article

Author: Regufe da Mota, Sergio ; Gervais, David ; Modi, Tapasvi

Erwinase® or Erwinaze® are the proprietary names for the L-asparaginase enzyme derived from Erwinia chrysanthemi.L-asparaginase is an integral part of the treatment of Acute Lymphoblastic Leukaemia (ALL) in children and adolescents. E. chrysanthemiL-asparaginase was first developed in the early 1970s at Porton Down and is currently manufactured by Porton Biopharma Ltd. One of the early purification steps during E. chrysanthemiL-asparaginase manufacture, involves use of batch cation exchange carboxymethyl resin, and alternatives to this older technology are currently under investigation using mass spectrometry to understand the impact of resin changes on the impurity profile. In this study, a novel SWATH library was developed for E. chrysanthemi proteome and used to evaluate this potential process change on product yield and host cell protein (HCP) profile and clearance. An ELISA assay is currently used as a quality control release test for quantifying HCPs at the Drug Substance (DS) stage, but these early extract samples are too crude for interference-free analysis by ELISA. Given that ELISA assay could not be used in the assessment of new resin options, SWATH LC-MS/MS analysis proved to be pivotal in selecting a resin for further scale-up and implementation. The data quantified that L-asparaginase from the new process step was 2.28-fold higher in concentration than in legacy-process samples. The new step, using a modern ion exchanger, was at least equivalent and in some cases outperformed the legacy resin step in terms of HCP clearance for 78.2% of total HCPs (528 of 675 total proteins).

04 Mar 2021·Human Vaccines & ImmunotherapeuticsQ3 · MEDICINE

Characterization of the UK anthrax vaccine and human immunogenicity

Q3 · MEDICINE

Article

Author: Subramaniam, Shaan ; Miller, Julie ; Smith, Stuart ; Modi, Tapasvi ; Gervais, David ; Shepherd, Adrian ; Thalassinos, Konstantinos

The manufacture of the UK Anthrax vaccine (AVP) focuses on the production of Protective Antigen (PA) from the Bacillus anthracis Sterne strain. Although used for decades, several of AVP's fundamental properties are poorly understood, including its exact composition, the extent to which proteins other than PA may contribute to protection, and whether the degree of protection varies between individuals.This study involved three innovative investigations. Firstly, the composition of AVP was analyzed using liquid chromatography tandem mass-spectrometry (LC-MS/MS), requiring the development of a novel desorption method for releasing B. anthracis proteins from the vaccine's aluminum-containing adjuvant. Secondly, computational MHC-binding predictions using NetMHCIIpan were made for the eight most abundant proteins of AVP, for the commonest HLA alleles in multiple ethnic groups, and for multiple B. anthracis strains. Thirdly, antibody levels and toxin neutralizing antibody (TNA) levels were measured in sera from AVP human vaccinees for both PA and Lethal Factor (LF).It was demonstrated that AVP is composed of at least 138 B. anthracis proteins, including PA (65%), LF (8%) and Edema Factor (EF) (3%), using LC-MS/MS. NetMHCIIpan predicted that peptides from all eight abundant proteins are likely to be presented to T cells, a pre-requisite for protection; however, the number of such peptides varied considerably between different HLA alleles.These analyses highlight two important properties of the AVP vaccine that have not been established previously. Firstly, the effectiveness of AVP within humans may not depend on PA alone; there is compelling evidence to suggest that LF has a protective role, with computational predictions suggesting that additional proteins may be important for individuals with specific HLA allele combinations. Secondly, in spite of differences in the sequences of key antigenic proteins from different B. anthracis strains, these are unlikely to affect the cross-strain protection afforded by AVP.

100 Deals associated with Porton Biopharma Ltd.

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100 Translational Medicine associated with Porton Biopharma Ltd.

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Pipeline

Pipeline Snapshot as of 02 Dec 2024

The statistics for drugs in the Pipeline is the current organization and its subsidiaries are counted as organizations,Early Phase 1 is incorporated into Phase 1, Phase 1/2 is incorporated into phase 2, and phase 2/3 is incorporated into phase 3

NDA/BLA

1

Other

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