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Advanced Antibody Repertoire Analysis Services

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At Creative Biolabs, we leverage two decades of expertise to provide an industry-leading Antibody Repertoire Analysis Solution, utilizing high-resolution sequencing and AI-integrated bioinformatics to transform complex biological samples into actionable therapeutic data. Our Antibody Repertoire Profiling platform is designed for researchers who demand the highest level of accuracy, depth, and physiological relevance. By bypassing traditional hybridoma limitations, we offer a direct window into the functional immune landscape, enabling the discovery of rare, high-affinity antibodies and the characterization of complex peptide–MHC complexes interactions.

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The Strategic Imperative of Antibody Repertoire Profiling

The ability to map the immune repertoire has transformed from a fundamental research tool into a strategic necessity across the pharmaceutical value chain. Whether the goal is to develop a novel checkpoint inhibitor or to evaluate the long-term memory induced by a vaccine, Antibody Repertoire Sequencing (Rep-Seq) provides the quantitative framework needed for success.

Navigating the Complexity of the Humoral and Cellular Response

Fig. 1 Development of αβT cell. (OA Literature) Fig. 1 Paired AIRR sequencing of the pro-B, pre-B, immature and naïve heavy, kappa and lambda Ab repertoire and long-read genomic sequencing of the immunoglobulin loci.1

The MemDX™ Antibody Repertoire Platform: A New Era in Immune Repertoire Solutions

The MemDX™ Antibody Repertoire Analysis platform is built on a foundation of proprietary molecular biology protocols and advanced computational algorithms. Unlike standard sequencing services, MemDX™ focuses on maintaining the biological context of every sequence, ensuring that the data generated is as functionally relevant as it is deep.

Capability Technical Detail Strategic Value
High-Resolution Resolution Individual cell-level partitioning and barcoding Native H/L andα/β pairing
Ultra-Deep Rep-Seq Up to 109 reads using optimized NGS pipelines Comprehensive coverage of the total repertoire diversity.
5' RACE Integration Template-switching oligo-based amplification Unbiased capture of the entire V(D)J region, including unknown V-genes.
UMI Error Correction Unique Molecular Identifiers for every mRNA Elimination of PCR bias and 99.9% reduction in sequencing artifacts.
pMHC Targeting Specialized enrichment for peptide–MHC complexes Direct discovery of antigen-specific TCRs and TCR-like antibodies.

Comprehensive Technology: The Science Behind MemDX™ Antibody Repertoire

Unbiased Bulk Antibody Repertoire Sequencing (Rep-Seq)

Our bulk sequencing service is the gold standard for population-level Antibody Repertoire Profiling. We have moved beyond the limitations of multiplex PCR, which often fails to amplify certain V-gene families due to primer mismatching.

High-Fidelity Native Chain Pairing

One of the primary challenges in Antibody Repertoire Analysis is the loss of heavy/light chain pairing information during standard bulk processing. MemDX™ solves this through a proprietary micro-compartmentalization approach. By partitioning immune cells into individual reaction environments—such as micro-droplets or nanowells—we can physically isolate the mRNA of a single cell. Within these environments, a unique barcode is attached to both the heavy and light chain transcripts. When the samples are pooled and sequenced, our bioinformatics pipeline uses these barcodes to reconstruct the original, biologically functional pair.

Interaction Analysis with Peptide–MHC Complexes

In the realm of T-cell therapy, the interaction between the TCR and the peptide–MHC complexes is the "holy grail". MemDX™ incorporates specialized antigen-binding assays that utilize pMHC multimers. We can selectively enrich for T cells that bind to a specific pMHC target before performing Antibody Repertoire Sequencing. This ensures that the resulting data is not just a list of sequences, but a functional map of antigen-specific immunity. This is particularly valuable for:

Advanced Bioinformatics: Transforming Data into Biological Intelligence

The true power of the MemDX™ Antibody Repertoire Solution lies in our computational core. Raw sequencing data is processed through a multi-stage AI-driven pipeline designed for maximum accuracy.

Pre-processing and UMI Consolidation

The first stage involves the identification and consolidation of Unique Molecular Identifiers (UMIs). By grouping reads that share the same UMI, we can distinguish between a clone that is truly expanded in the patient and a sequence that was simply over-amplified during PCR. This provides an absolute quantitative count of the immune repertoire.

V(D)J Annotation and Germline Alignment

Using the most comprehensive versions of databases, MemDX™ identifies the V, D, and J segments of every sequence. We calculate the level of somatic hypermutation (SHM) by comparing the observed sequence to the inferred germline, allowing us to quantify the "age" and maturity of the immune response.

CDR3 Analysis and Diversity Metrics

The CDR3 region is the primary determinant of antigen binding. Our Antibody Repertoire Profiling includes:

  • Length Distribution Analysis: Identifying shifts in CDR3 length that are characteristic of certain diseases.
  • Amino Acid Propensity: Modeling the biochemical properties (charge, hydrophobicity) of the binding interface.
  • Diversity Indices: Calculating Shannon Entropy, Simpson's Index, and Chao1 estimators to quantify the richness and evenness of the repertoire.

Clonal Lineage and Phylogenetic Reconstruction

We build sophisticated phylogenetic trees that show the evolutionary trajectory of B-cell clones. This is essential for understanding how an antibody evolves from a low-affinity germline precursor to a high-affinity therapeutic candidate.

Strategic Applications of Antibody Repertoire Services

Therapeutic Lead Discovery

For pharmaceutical companies, MemDX™ serves as a high-speed discovery engine. By sequencing the repertoires of immunized animals (including transgenic "humanized" mice or camelids), we can identify thousands of potential leads. This "Next-Gen Discovery" eliminates the bottleneck of traditional screening and provides a much broader pool of candidates from which to select for developability and affinity.

Vaccine Evaluation and Development

A successful vaccine must do more than produce a high titer of antibodies; it must produce a diverse and durable immune memory. Our Antibody Repertoire Sequencing services allow researchers to track the persistence of specific clones over months or years, providing a quantitative metric for vaccine-induced immunity.

Oncology and Immuno-monitoring

In the era of PD-1/PD-L1 inhibitors, understanding the TCR repertoire of Tumor-Infiltrating Lymphocytes (TILs) is critical. MemDX™ can identify "convergent" clones—different sequences that likely target the same tumor antigen—which can serve as potent biomarkers for treatment response.

Autoimmune and Inflammatory Research

By identifying expanded autoreactive clones in the peripheral blood or synovial fluid, MemDX™ helps researchers understand the underlying drivers of diseases like Lupus or Rheumatoid Arthritis. This facilitates the development of targeted therapies that neutralize specific clones without compromising the entire immune system.

Why Choose Creative Biolabs?

With over 20 years of experience, Creative Biolabs is more than a service provider; we are your scientific collaborators.

Explore Our Comprehensive Services

Creative Biolabs offers a modular suite of repertoire analysis services tailored to address diverse research questions:

Optional antibody fragment repertoire analysis services:

Creative Biolabs is committed to excellence in immune repertoire research. With MemDX™ Antibody Repertoire Analysis Services, we provide the clarity and depth you need to advance the next generation of biotherapeutics.

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Frequently Asked Questions (FAQs)

  1. Q: What is MemDX™ Antibody Repertoire Analysis?

    A: MemDX™ is Creative Biolabs' flagship platform for the comprehensive sequencing and characterization of BCR and TCR repertoires, providing deep insights into immune diversity and clonal expansion.

  2. Q: How does MemDX™ differ from traditional Rep-Seq?

    A: MemDX™ integrates 5' RACE for unbiased amplification, UMIs for error correction, and proprietary partitioning for native chain pairing, offering higher resolution than standard bulk sequencing.

  3. Q: Can you analyze repertoires from camelids or rabbits?

    A: Yes. MemDX™ is species-agnostic. We have optimized primer sets for humans, non-human primates, rodents, rabbits, camelids (VHH), and even avian species.

  4. Q: What is the significance of the peptide–MHC complexes in your analysis?

    A: We use pMHC complexes to isolate and sequence the specific T-cells (or TCR-like B-cells) that recognize a target antigen, which is crucial for developing targeted immunotherapies.

  5. Q: How much starting material is required for MemDX™ Antibody Repertoire Profiling?

    A: Typically, we require 105 to 107 PBMCs or isolated cells, or approximately 2-5 mL of whole blood. We can also work with tissue biopsies and sorted cell populations.

  6. Q: How do you handle sequencing errors in the CDR3 region?

    A: By using Unique Molecular Identifiers (UMIs), we can verify every sequence by comparing multiple reads from the same original molecule, effectively eliminating sequencing artifacts.

  7. Q: Can MemDX™ reconstruct full-length V(D)J sequences?

    A: Absolutely. Our platform is optimized for full-length variable region sequencing, which is essential for the recombinant expression of identified antibody candidates.

  8. Q: Is the MemDX™ platform suitable for clinical diagnostics?

    A: No, our services are for Research Use Only (RUO). They provide critical data for drug discovery and academic research but are not intended for clinical diagnostic procedures.

  9. Q: How do I send samples to Creative Biolabs?

    A: We provide detailed shipping instructions for frozen cells, PBMCs in stabilizing buffer, or fresh tissue to ensure sample integrity during transit to our global facilities.

Reference

  1. Rodriguez, Oscar L., et al. "Human genetic variation shapes the antibody repertoire across B cell development." BioRxiv (2025). Distributed under Open Access license CC BY 4.0, without modification. https://doi.org/10.1101/2025.05.19.654982

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