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PubMed Journals Articles About "Juvaris BioTherapeutics, Inc" RSS

07:26 EDT 17th October 2018 | BioPortfolio

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Showing "Juvaris BioTherapeutics" PubMed Articles 1–25 of 25

Synthetic Biology and Engineered Live Biotherapeutics: Toward Increasing System Complexity.

Recent advances in synthetic biology and biological system engineering have allowed the design and construction of engineered live biotherapeutics targeting a range of human clinical applications. In this review, we outline how systems approaches have been used to move from simple constitutive systems, where a single therapeutic molecule is expressed, to systems that incorporate sensing of the in vivo environment, feedback, computation, and biocontainment. We outline examples where each of these capabiliti...


Cell Penetration Profiling Using the Chloroalkane Penetration Assay.

Biotherapeutics are a promising class of molecules in drug discovery, but they are often limited to extracellular targets due to their poor cell penetration. High-throughput cell penetration assays are required for the optimization of biotherapeutics for enhanced cell penetration. We developed a HaloTag-based assay called the ChloroAlkane Penetration Assay (CAPA), which is quantitative, high-throughput, and compartment-specific. We demonstrate the ability of CAPA to profile extent of cytosolic penetration w...

Integrated BioTherapeutics.


Live bacterial biotherapeutics in the clinic.

Data-independent oxonium ion profiling of multi-glycosylated biotherapeutics.

The characterization of glycosylation is required for many protein therapeutics. The emergence of antibody and antibody-like molecules with multiple glycan attachment sites has rendered glycan analysis increasingly more complicated. Reliance on site-specific glycopeptide analysis is therefore necessary to fully analyze multi-glycosylated biotherapeutics. Established glycopeptide methodologies have generally utilized a priori knowledge of the glycosylation states of the investigated protein(s), database sear...

Recent advancements, challenges, and practical considerations in the mass spectrometry-based analytics of protein biotherapeutics: A viewpoint from the biosimilar industry.

The extensive analytical characterization of protein biotherapeutics, especially of biosimilars, is a critical part of the product development and registration. High-resolution mass spectrometry became the primary analytical tool used for the structural characterization of biotherapeutics. Its high instrumental sensitivity and methodological versatility made it possible to use this technique to characterize both the primary and higher-order structure of these proteins. However, even by using high-end instru...

Perspectives on progressive strategies and recent trends in the production of recombinant human factor VIII.

Factor VIII (fVIII), a glycoprotein cofactor, plays a crucial role in the intrinsic blood coagulation pathway. As one of the most essential blood clotting factors known today, fVIII is the largest and most complex commercialized therapeutic protein used in the treatment of hemophilia A, an X-linked recessive disorder. Two lyophilized fVIII concentrates (viz., plasma fractionated and recombinant) are in use to treat hemorrhagic episodes in patients suffering with hemophilia A. Recombinant fVIII (rfVIII) prod...

Falsification of biotechnology drugs: current dangers and/or future disasters?

Falsified medical products have become a global threat since they were first mentioned to the general public at the conference of experts on the rational use of drugs organized by the world health organization (WHO) in 1985. Today, official estimates of the annual death toll due to falsified medical products range between two hundred thousand and one million. Although the extent of this global problem is the most significant in the developing world, an increasing number of reports have demonstrated the pres...

Tuning the Diels-Alder Reaction for Bioconjugation to Maleimide Drug-Linkers.

The thiol-maleimide linkage is widely used for antibody-drug conjugate (ADC) production; however, conjugation of maleimide-drugs could be improved by simplified procedures and reliable conjugate stability. Here, we report the evaluation of electron-rich and cyclic dienes that can be appended to antibodies and reacted with maleimide-containing drugs through the Diels-Alder (DA) reaction. Drug conjugation is fast and quantitative due to reaction acceleration in water, and the linkage is more stable in serum t...

Dynamic Core-Shell Bioconjugates for Targeted Protein Delivery & Release.

Dynamic covalent chemistry is a versatile and powerful tool that integrates both stable chemical bonds and stimulus responsiveness into the construction of smart biotherapeutics. With minimalistic molecular design, a dynamic covalent protein assembly that incorporates selective targeting and intracellular release upon pH stimulus is presented. The construct comprises an active enzymatic protein core (cytochrome c) self-assembled with cancer cell targeting motifs (somatostatin) through boronic acid/salicylhy...

Multi-targeted dihydrazones as potent biotherapeutics.

Hydrazone compounds were considered as a useful moiety in drug design development. Therefore, these studies were aimed at the synthesis of new dihydrazones and were screened for their in vitro H/K-ATPase and anti-inflammatory activities. The results revealed that compounds 9 (22 ± 0.62 µg/mL), 10 (26 ± 0.91 µg/mL), 15 (24 ± 0.44 µg/mL), 16 (28 ± 0.63 µg/mL), 17 (12 ± 0.38 µg/mL), 18 (14 ± 0.47 µg/mL), 19 (26 ± 0.54 µg/mL), 20 (16 ± 0.41 µg/mL),...

Biosimilars in oncology and inflammatory diseases: current and future considerations for clinicians in Latin America.

Biological therapies have revolutionized the treatment of several cancers and systemic immune-mediated inflammatory conditions. Expiry of patents protecting a number of biologics has provided the opportunity to commercialize highly similar versions, known as biosimilars. Biosimilars are approved by regulatory agencies via an independent pathway that requires extensive head-to-head comparison with the originator product. Biosimilars have the potential to provide savings to healthcare systems and expand patie...

Oncolytic Viruses on Drugs - Achieving Higher Therapeutic Efficacy.

Over the last twenty years there has been a dramatic expansion in the testing of oncolytic viruses (OVs) for the treatment of cancer. OVs are unique biotherapeutics that induce multimodal responses towards tumours; from direct cytopathic effects on cancer cells, to tumour associated blood vessel disruption, and ultimately potent stimulation of anti-tumour immune activation. These agents are highly targeted and can be efficacious as cancer treatments resulting in some patients experiencing complete tumour re...

Fluoropolymers for intracellular and in vivo protein delivery.

The design of efficient and universal carriers to transport proteins into cells is highly desirable in the development of biotherapeutics. However, intracellular protein delivery remains a major challenge owing to the multiple barriers in protein delivery process, such as protein encapsulation, endocytosis, endosomal escape and intracellular protein release. Recently, it was reported that fluorination on polymers is beneficial for their self-assembly and intracellular trafficking. We hypothesize the fluorop...

The Multifaceted Uses and Therapeutic Advantages of Nanoparticles for Atherosclerosis Research.

Nanoparticles are uniquely suited for the study and development of potential therapies against atherosclerosis by virtue of their size, fine-tunable properties, and ability to incorporate therapies and/or imaging modalities. Furthermore, nanoparticles can be specifically targeted to the atherosclerotic plaque, evading off-target effects and/or associated cytotoxicity. There has been a wealth of knowledge available concerning the use of nanotechnologies in cardiovascular disease and atherosclerosis, in parti...

Protein Nanotherapeutics as an Emerging Modality for Cancer Therapy.

Protein drugs are a unique and versatile class of biotherapeutics that have not only high biological activity but also superb specificity. This rapidly evolving biotechnology has rendered it possible to produce various proteins in a large scale and reproducible way. Many proteins have demonstrated striking anticancer activities and have emerged as advanced alternatives to cytotoxic chemotherapeutic agents for cancer therapy. The clinical translation of anticancer proteins with intracellular targets is, neve...

The importance of imaging strategies for pre-clinical and clinical in vivo distribution of oncolytic viruses.

Oncolytic viruses (OVs) are an emergent and unique therapy for cancer patients. Similar to chemo- and radiation therapy, OV can lyse (kill) cancer cell directly. In general, the advantages of OVs over other treatments are primarily: a higher safety profile (as shown by less adverse effects), ability to replicate, transgene(s) delivery, and stimulation of a host's immune system against cancer. The latter has prompted successful use of OVs with other immunotherapeutic strategies in a synergistic manner. In sp...

Spatially controlled assembly of affinity ligand and enzyme cargo enables targeting ferritin nanocarriers to caveolae.

One of the goals of nanomedicine is targeted delivery of therapeutic enzymes to the sub-cellular compartments where their action is needed. Endothelial caveolae-derived endosomes represent an important yet challenging destination for targeting, in part due to smaller size of the entry aperture of caveolae (ca. 30-50 nm). Here, we designed modular, multi-molecular, ferritin-based nanocarriers with uniform size (20 nm diameter) for easy drug-loading and targeted delivery of enzymatic cargo to these specif...

Multi-angle light scattering as a process analytical technology measuring real-time molecular weight for downstream process control.

For many protein therapeutics including monoclonal antibodies, aggregate removal process can be complex and challenging. We evaluated two different process analytical technology (PAT) applications that couple a purification unit performing preparative hydrophobic interaction chromatography (HIC) to a multi-angle light scattering (MALS) system. Using first principle measurements, the MALS detector calculates weight-average molar mass, M and can control aggregate levels in purification. The first application ...

GlycoStore: A Database of Retention Properties for Glycan Analysis.

GlycoStore is a curated chromatographic, electrophoretic and mass-spectrometry composition database of N-, O-, glycosphingolipid (GSL) glycans and free oligosaccharides associated with a range of glycoproteins, glycolipids and biotherapeutics. The database is built on publicly available experimental data sets from GlycoBase developed in the Oxford Glycobiology Institute and then the National Institute for Bioprocessing Research and Training (NIBRT). It has now been extended to include recently published and...

Discovery, characterization, and remediation of a C-terminal Fc-extension in proteins expressed in CHO cells.

Protein-based biotherapeutics are produced in engineered cells through complex processes and may contain a wide variety of variants and post-translational modifications that must be monitored or controlled to ensure product quality. Recently, a low level (~1-5%) impurity was observed in a number of proteins derived from stably transfected Chinese hamster ovary (CHO) cells using mass spectrometry. These molecules include antibodies and Fc fusion proteins where Fc is on the C-terminus of the construct. By liq...

Homology modeling and structure-based design improve hydrophobic interaction chromatography behavior of integrin binding antibodies.

Monoclonal antibody (mAb) candidates from high-throughput screening or binding affinity optimization often contain mutations leading to liabilities for further development of the antibody, such as aggregation-prone regions and lack of solubility. In this work, we optimized a candidate integrin α11-binding mAb for developability using molecular modeling, rational design, and hydrophobic interaction chromatography (HIC). A homology model of the parental mAb Fv region was built, and this revealed hydrophobic ...

Qualitative analysis of antibody-drug conjugates (ADCs): an experimental comparison of analytical techniques of cysteine-linked ADCs.

Antibody-drug conjugates (ADCs) are an emerging type of biotherapeutics that utilize multiple tissue-specific antibodies combined with a range of linker designs to enable the transportation and selective release of cytotoxic drugs in close proximity to tumours. Consisting of antibodies conjugated to small drug molecules through a variety of linkers, ADCs are chemically complex analytes. Here we present a unique experimental comparison of four techniques for ADC analysis: hydrophobic interaction chromatograp...

Enhancing recombinant antibody performance by optimally engineering its format.

Antibody-based sensors are now widely used in therapeutics, diagnostics, and in environmental monitoring. Recombinant antibodies are becoming integral parts of such devices due to their reported high affinities, their capacity for engineering to achieve highly defined performance characteristics and the fact that their production can be optimized to a significant degree. To aid as a model for the identification of important analyte binding residues within the antibody sub-structure and elucidate the docking...

Multifunctional Nanoparticles Enable Efficient Oral Delivery of Biomacromolecules via Improving Payload Stability and Regulating the Transcytosis Pathway.

In oral delivery of biomacromolecules, ligand-modified nanoparticles (NPs) have emerged as a promising tool to improve the epithelial uptake of the loaded protein/peptide. Unfortunately, the stability and the transport mechanisms of the biotherapeutics during the intracellular transportation still remained unclear, leading to the poor transepithelial efficiency. Additionally, developing novel approaches to simultaneously monitor the payload bioactivity during the transport processes is veritably benefit for...


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