About Mingjie Xie

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So far Mingjie Xie has created 131 blog entries.

February 2024

Maximizing Liquid Biopsy Sensitivity through the Power of DNA-Binding Antibodies

2024-04-24T10:33:09-04:00February 1st, 2024|Webinars|

In this webinar, you will learn: Non-Invasive Liquid Biopsies: Cell-free DNA as a key analyte for non-invasive liquid biopsies for cancer diagnosis and monitoring. Enhanced Cell-Free DNA Recovery: Strategies to improve cell-free DNA recovery, including the use of DNA priming agents like DNA-binding monoclonal antibodies. Fc-Domain Engineering: The process of engineering [...]

November 2023

Alpaca Antibody Discovery and Characterization with Polyclonal Sequencing, SPR and HDX-MS

2024-05-06T15:58:09-04:00November 13th, 2023|Case Studies|

Authors:  Teresa Nunez, Amber Couzens, Jin Duan, Chelsea Reitzel, Rosalin Dubois,  Lin Wu, Qixin Liu, Thierry Le Bihan, Marko Jović, Dominic Narang, Bin Ma  Published: Nov 13, 2023 Abstract In this study, the challenge of accessing functional antibodies from the circulating antibody repertoire was addressed using Rapid Novor's [...]

August 2023

Latest Advancements in Antibody Engineering – Bispecifics, Diagnostic Controls, and More

2024-04-24T10:35:04-04:00August 29th, 2023|Webinars|

In this webinar, you will learn: Antibody technologies for the design of unique antibody formats Advancements in engineering efforts for the development of functionally tailored antibodies, recombinant isotype antibody panels, and multivalent fragment antibody constructs Characterization of different bispecific antibody formats Next generation protein sequencing to aid in bispecific antibody design [...]

July 2023

Antibody Discovery Dead Ends and New Approaches

2024-04-24T10:48:42-04:00July 20th, 2023|Webinars|

In this webinar, you will learn: About the challenges commonly encountered in antibody discovery campaigns, including non-functional antibodies, limited diversity, developability issues, and immunogenicity. How to de-risk antibody discovery campaigns, while balancing speed and spend Discover how a proteomics and mass spectrometry-based approach to antibody discovery, utilizing REpAb polyclonal sequencing, presents [...]

June 2023

CAR-iNKT Cells Targeting Clonal TCRVβ Chains as a Precise Strategy to Treat T Cell Lymphoma

2024-04-24T10:51:06-04:00June 16th, 2023|Case Studies|

With 22 functional T cell receptor (TCR)Vβ subunit families making up the normal T cell repertoire, signals from these cell surface receptors often determine the fate of normal cells. However, mutations in TCR signaling proteins are frequently associated with peripheral T cell lymphomas (TCLs), including adult T cell leukemia/lymphoma (ATL), which indicates a driving role for TCRs in TCL oncogenesis. As TCL and ATL are clonal in nature, tumour cells typically express a single TCRVβ subunit with no bias in the usage of TCRVβ subunit families. Consequently, targeting the specific TCRVβ subunit presents a promising therapeutic approach that is highly selective and tumour-specific.

Antibody Drug Discovery and Development

2024-05-06T11:45:54-04:00June 9th, 2023|Articles|

Written by: Vanessa Yoon Calvelo, PhD Published: June 6, 2023 Contents The Drug Development Pathway: Overview and Challenges Early Discovery and Development of Therapeutic Antibodies Target Identification and Validation Antibody Discovery and Expression Lead Characterization and Selection Lead Engineering and Optimization Candidate Selection The Drug Development Pathway: Overview [...]

Breakthrough: Sequencing Functional Antibody Proteins Directly from Human Blood

2024-03-15T12:04:14-04:00June 5th, 2023|News|

Rapid Novor Inc., the world’s leader in mass spectrometry (MS)-based antibody protein sequencing, announced today that its REpAb® antibody discovery platform was used to successfully sequence a complex mixture of functional antibodies directly from the serum of a human patient after receiving a COVID-19 vaccine. “This demonstrates a significant breakthrough in antibody discovery technology [...]

May 2023

Rational Antibody Design and Engineering with Next Generation Protein Sequencing

2024-04-29T13:20:11-04:00May 9th, 2023|Webinars|

In this webinar, you will learn: A strategy for generating recombinant mAbs and antibody derivatives directed towards antigens involved in mitotic cell division Methods for antibody engineering and customization, species switching, and construction of antibody fragments How Next Generation Protein Sequencing (NGPS) works Applications of NGPS to aid engineering and recombinant production of [...]

Functional Characterization of Therapeutic Antibodies

2024-04-24T10:40:24-04:00May 3rd, 2023|Articles|

Written by: Vanessa Yoon Calvelo, PhD Published: April 24, 2023 Contents Introduction Functions of Therapeutic Antibodies Functional Assays for Therapeutic Antibodies Functional Characterization in the Therapeutic Antibody Discovery Process Introduction Monoclonal antibodies (mAbs) and related biological products often present as ideal therapeutics largely due to: Their [...]

April 2023

Immunochemical Characterization of Therapeutic Antibodies

2024-05-06T15:49:12-04:00April 17th, 2023|Articles|

Written by: Vanessa Yoon Calvelo, PhD Published: April 14, 2023 Contents Introduction Immunochemical Properties of Therapeutic Antibodies Rapid Immunochemical Characterization of Antibodies Introduction Therapeutic antibodies, predominantly monoclonal antibodies (mAbs), are a rapidly expanding class of drugs with over 100 mAb-based biologics now approved for the treatment [...]

The Shortcut to Reliable Diagnostic, Control, and Assay Antibodies

2024-04-25T10:09:41-04:00April 5th, 2023|Webinars|

In this webinar, you will learn: IVD and immunoassays, supply chain risk management considerations How monoclonal and polyclonal antibody sequencing works, requirements Effective production, validation, and scale-up of recombinant antibody reagents Characterization of mAbs for assay design Abstract Polyclonal antibodies (pAbs) are well known for their robustness and [...]

Navigating Intellectual Property Protection for Antibodies

2024-05-06T15:50:21-04:00April 1st, 2023|Webinars|

In This Webinar, You Will Learn: Why IP is important in the development of antibody-based assets Patent application process and requirements How to strengthen patent applications Applications of De Novo Protein Sequencing, SPR assays, and HDX-MS for antibody-related patent applications Abstract In the development of novel and innovative antibody-based assets, [...]

March 2023

Rapid Novor’s Blood Test for Multiple Myeloma Monitoring is CLIA Certified for Clinical Use in the US

2024-03-15T12:07:04-04:00March 16th, 2023|News|

Rapid Novor’s Blood Test for Multiple Myeloma Monitoring is CLIA Certified for Clinical Use in the US Rapid Novor Inc., the world’s leader in mass spectrometry (MS)-based antibody protein sequencing, announced today that its diagnostic laboratory obtained the Clinical Laboratory Improvement Amendments (CLIA) certification for their EasyM™ assay as a Laboratory Developed Test (LDT). [...]

Bruker Launches de novo Sequencing for Immunopeptidomics, Library-Free dia-PASEF, Mass Dynamics Knowledge Visualization

2023-11-03T19:41:45-04:00March 7th, 2023|News|

Bruker Launches de novo Sequencing for Immunopeptidomics, Library-Free dia-PASEF, Mass Dynamics Knowledge Visualization At the 19th US HUPO, Bruker Corporation (Nasdaq: BRKR) announced important bioinformatics launches for 4D-Proteomics on the timsTOF platform: A novel de novo sequencing algorithm was developed in collaboration with Rapid Novor Inc., using over 1.7 million PASEF data-points to improve accuracy [...]

February 2023

Nanobody Lead Optimization with Epitope Mapping and Binning

2024-05-06T15:59:33-04:00February 14th, 2023|Webinars|

In this webinar, you will learn: How Rapid Novor’s de novo polyclonal sequencing platform REpAb® can accelerate any nanobody development pipeline How SPR and HDX-MS integrate into an antibody discovery and development workflow How to choose optimal lead candidates with SPR and HDX-MS How epitopes can be characterized using SPR and HDX-MS [...]

Towards Antigen-Specific Tregs for Type 1 Diabetes: Construction and Functional Assessment of Pancreatic Endocrine Marker, HPi2-Based Chimeric Antigen Receptor

2024-04-24T10:42:26-04:00February 3rd, 2023|Case Studies|

Antibodies with established, specific targets can be sequenced and utilized to engineer the hinge region and antigen-binding domains with antibody fragments and derivatives. With the sequence information in hand, further steps to optimizing a viable therapeutic approach can be more accessible.

December 2022

Technologies for Antibody Discovery and Generation

2024-05-06T11:49:48-04:00December 23rd, 2022|Articles|

The great debate on the use of in vivo versus in vitro sources and strategies for antibody discovery and generation continues to thrive among antibody research groups. On one side of the debate is the argument for non-animal-derived antibodies due to the technical advancements of current in vitro technologies, and the moral obligation to reduce animal usage. On the other side of the debate is the counterargument for animal-derived antibodies due to their better performance in affinity, specificity, and reduced immunogenicity risk.

October 2022

Resistance to Autosomal Dominant Alzheimer’s Disease in an APOE3 Christchurch Homozygote

2024-04-24T10:43:19-04:00October 21st, 2022|Case Studies|

De novo protein sequencing provided the research team with insurance by securing the complete amino acid sequence of a therapeutic mAb candidate for ADAD. This mass spectrometry-based protein sequencing technique can be used to obtain the sequence information of any antibody or protein for biomarker discovery, characterization, and validation. Access to this structural information only broadens our understanding of disease pathogenesis and fosters the development of innovative therapeutic or preventative treatments.

Characterizing Biomolecular Interactions with Surface Plasmon Resonance

2024-05-06T15:53:39-04:00October 21st, 2022|Articles|

Biological processes are driven by molecules that interact through specific molecular contacts, often to form a stable complex. These interactions are typically defined by the principles of thermodynamics as well as biomolecular structure and recognition. At the simplest level is the interaction between a target molecule with a specific binding site and a probing molecule that binds to that site, resulting in the bound complex.

September 2022

Characterizing Fragile Protein Complexes

2024-04-24T10:43:28-04:00September 14th, 2022|Webinars|

Webinar Highlights You will learn: Introduction to the structure and function of the tuberous sclerosis protein complex (pTSC) A novel strategy for isolating and purifying protein complexes from native sources using recombinantly produced Fabs How Next Generation Protein Sequencing (NGPS) works Applications of NGPS to aid design and engineering of recombinant antibody [...]

August 2022

Surface Plasmon Resonance Spectroscopy

2024-05-06T15:55:26-04:00August 16th, 2022|Articles|

Written by: Vanessa Yoon Calvelo, PhD Updated: January 19, 2023 (Published: August 11, 2022) Contents What is Surface Plasmon Resonance Spectroscopy? What is SPR Used For? How Does SPR Work? SPR Experimental Workflow SPR Sensorgram SPR Advantages SPR Applications SPR Antibody-Antigen Interaction Analysis at Rapid Novor What is [...]

Moving Towards Biosimilar Drugs

2024-04-01T16:01:07-04:00August 4th, 2022|Articles|

Written by: Vanessa Yoon Calvelo, PhD Published: August 3, 2022 Contents What are Biosimilar Drugs? Why are Biosimilars Being Developed? Biosimilars are not the Equivalent of Generics Biosimilar Development Biosimilar Monoclonal Antibodies De Novo Protein Sequencing Solutions in Biosimilar Development What are Biosimilar Drugs? Biosimilar drugs, [...]

July 2022

Protein Characterization by HDX-MS

2023-06-21T11:01:38-04:00July 26th, 2022|Articles|

Characterization of proteins and protein complexes is a major keystone of structural biology. As our understanding of cellular processes continues to evolve from simple pathways to complicated networks, our need for advanced analytical methods is quite apparent. Mass spectrometry (MS)-based structural approaches can be used to study protein conformational changes and dynamics, protein motion/flexibility, ligand-protein binding, and protein-protein interfaces.

Alpaca Serum Antibodies Decoded with Rapid Novor’s De Novo Protein Sequencing Technology

2023-11-03T19:42:06-04:00July 19th, 2022|News|

Alpaca Serum Antibodies Decoded with Rapid Novor’s De Novo Protein Sequencing Technology Rapid Novor Inc., the world's leader in antibody protein sequencing using mass spectrometry, announced today that its REpAb® antibody discovery platform was used to successfully sequence 10 unique nanobodies directly from an alpaca’s serum polyclonal antibody proteins. Furthermore, the 10 nanobodies were recombinantly [...]

Adeno-Associated Virus Vectors for Gene Therapy Delivery

2023-06-22T10:41:47-04:00July 14th, 2022|Articles|

Written by: Vanessa Yoon Calvelo, PhD Published: July 11, 2022 Contents What is Gene Therapy? What are Adeno-Associated Viruses? Engineering of AAVs for Gene Therapy Engineering AAVs for Improved Transduction Engineering AAVs for Improved Immunogenicity De Novo Protein Sequencing Applications in AAV Characterization and Development What is Gene [...]

Next Generation Vaccine Development with Proteomics

2024-04-24T10:43:40-04:00July 5th, 2022|Webinars|

As nearly all individuals have pre-existing immunity to influenza viruses, influenza-specific memory B cells will likely be recalled upon COBRA HA vaccination. By comparing the antibody response towards specific wild-type influenza strains and COBRA antigens, we can begin to understand the potential for COBRA-based vaccines to be used in the clinic.

June 2022

Chimeric Antigen Receptors and T cells – CAR-T

2024-04-01T15:56:27-04:00June 21st, 2022|Articles|

Written by: Vanessa Yoon Calvelo, PhD Published: June 13, 2022 Contents What is CAR-T Cell Therapy? CAR Structure and Function CAR-T Cell Development Engineering Strategies for CAR-T Cells De Novo Protein Sequencing Applications in CAR-T Cell Development What is CAR-T Cell Therapy? The infusion of T cells [...]

Characterization and Modulation of Anti-αβTCR Antibodies and Their Respective Binding Sites at the βTCR Chain to Enrich Engineered T Cells

2024-04-24T10:43:50-04:00June 17th, 2022|Case Studies|

αβTCR-engineered T cells have been applied in clinical trials, specifically directed against cancer/testis antigens. Though the clinical outcomes are promising, only a small proportion of patients benefit from these novel treatments. Lower response rates are partially attributed to a heterogeneous mixture of non-engineered and poorly engineered T cells that remain in the administered therapeutic product. For successful translation of these novel treatments into the clinic, engineering efforts should be reinforced with effective methods for engineered T cell purification and engineered T cell elimination post infusion into patients.

Why do Post-Translational Modifications Matter?

2023-05-15T11:19:45-04:00June 14th, 2022|Articles|

Written by: Vanessa Yoon Calvelo, PhD Updated: January 19, 2023 (Published: June 2, 2022) Contents What are post-translational modifications (PTMs)? Impact of PTMs Types of PTMs PTMs increase microheterogeneity of antibodies Characterization of PTMs by next generation protein sequencing The Importance of Post-Translational Modifications (PTMs) Post-translational [...]

Protein Structure and How to Study It

2023-05-15T11:21:16-04:00June 10th, 2022|Articles|

Written by: Yuning Wang, PhD Updated: January 26, 2023 (Published: June 3, 2022) Contents Introduction The Four Levels of Protein Structure How are Protein Structures Studied? Introduction Structural information provides a great deal of understanding of how a protein works, which can allow us to [...]

What is Polyclonal Antibody Sequencing?

2024-05-06T12:16:55-04:00June 1st, 2022|Articles|

The most straightforward solution would be to determine sequences of the dominating antibody forms in a polyclonal mixture to enable recombinant antibody generation and ensure reproducibility. This was recently made possible by the development of polyclonal antibody sequencing technology, which will be reviewed in this article.

May 2022

What is HDX-MS Epitope Mapping?

2023-06-21T11:00:11-04:00May 15th, 2022|Articles|

The origin of hydrogen-deuterium exchange (HDX) dates back to the 1950s, when protein scientist Linderstrøm-Lang created a method involving protein deuteration to distinguish amide hydrogens participating in secondary structures. Today, scientists frequently rely on HDX data to investigate protein structure, conformational dynamics, and protein-ligand interaction.

Enriching Engineered T Cells with Antibody Sequencing & Modulation

2024-04-24T10:56:54-04:00May 10th, 2022|Webinars|

Known, high-performing and well used antibodies against useful targets on CAR-T cells can be examined for mechanism of action using proteomics and mass spectrometry. Knowledge of the antibody sequences via Next Generation Protein Sequencing (NGPS) can be useful for humanizing or otherwise engineering constructs. Rapid Epitope mapping by HDX can be useful for both epitope and paratope engineering strategies.

April 2022

Broadly Neutralizing Antibody Cocktails Targeting Nipah Virus and Hendra Virus Fusion Glycoproteins

2024-04-24T10:43:58-04:00April 29th, 2022|Case Studies|

Hendra virus (HeV) and Nipah virus (NiV) are types of Henipaviruses (HNVs) that originated in bats and can infect the human respiratory system with detrimental consequences. As enveloped, single-stranded RNA viruses, HeV and NiV use attachment (G) and fusion (F) glycoproteins on the envelope membrane to enter host cells. So far, there are no approved therapeutics or vaccines to combat the viruses in humans.