What are the sample submission requirements for the service?

We accept a range of sample types, including cryopreserved PBMCs, B cells isolated by sorting, and fresh or frozen tissues such as spleen, lymph nodes, and bone marrow. For optimal results, we recommend a minimum of 1 million B cells or an equivalent amount of tissue. Please contact our technical support team for detailed sample preparation and shipping guidelines.

What is the typical sequencing depth provided, and is it customizable?

Our standard service provides deep sequencing coverage, typically yielding hundreds of thousands to millions of unique, full-length V(D)J reads per sample, which is sufficient for most research applications. However, the sequencing depth is fully customizable. We can tailor the project scope to meet specific needs, such as the requirement for ultra-deep sequencing to detect extremely rare clones.

Can you analyze both heavy and light chain repertoires from the same sample?

Yes. Our service is designed to profile both the immunoglobulin heavy chain (IGH) and the light chains (IGK and IGL) from the same initial RNA sample. This enables a more complete characterization of the antibody repertoire, including analysis of heavy/light chain pairing preferences in some contexts.

What is the format of the final data deliverables?

Clients receive a comprehensive data package that includes raw sequencing data (FASTQ files), processed and annotated sequence lists, and a detailed summary report. The report presents key findings in publication-ready figures and tables, including V(D)J gene usage statistics, CDR3 length distribution plots, clonotype frequency analysis, and SHM reports. Further custom bioinformatics analysis is also available upon request.

Feline (Cat) BCR Repertoire Profiling Service

Introduction Platform Services Application Other Species Advantages FAQs

Illuminating the Feline Immune System

Fig.1 A cat. (Creative Biolabs AI)

The domestic cat, Felis catus, occupies a unique position in biomedical science, serving not only as a cherished companion animal but also as an increasingly vital model for human disease. The feline immune system, which shares fundamental organizational principles with that of humans, including the V(D)J recombination mechanism for generating antibody diversity, presents a powerful paradigm for studying a range of pathologies. Despite this dual importance, a profound gap persists in our fundamental understanding of the feline humoral immune system.

Current knowledge gaps

Uncharted BCR repertoire	Limited data on V, D, and J gene segment usage Insufficient characterization of CDR3 diversity and biochemical properties Lack of systematic mapping of somatic hypermutation (SHM) in health and disease
Unique evolutionary divergence	Feline IGHV gene locus lacks clear orthologs in humans, mice, or canines Cross-species inference is unreliable → requires species-specific profiling

To address this critical lacuna, Creative Biolabs has developed a dedicated Feline (Cat) BCR Repertoire Profiling Service.

Unlock New Insights into Feline Immunity. Request a Consultation Today.

Our High-Fidelity Immunoprofiling Platform

The architecture combines advanced molecular biology techniques with the power of next-generation sequencing and a bespoke bioinformatics pipeline.

Fig.2 http://47.109.42.40:8006/images/20180710234051_9511.jpg. (Creative Biolabs Authorized)

Feline-Specific 5' RACE Amplification

To ensure unbiased and comprehensive capture of the expressed BCR repertoire, we utilize a 5' Rapid Amplification of cDNA Ends (RACE)-based protocol. This is coupled with a proprietary set of multiplex primers designed with high specificity for the constant regions of feline immunoglobulin heavy (IGH) and light (IGK, IGL) chains, circumventing the primer bias inherent in V-gene-targeted multiplex PCR approaches.

Identifying Technology

Each individual cDNA molecule is tagged with a identifier prior to amplification. This critical step enables the bioinformatic correction of PCR amplification biases and sequencing errors, allowing for the precise quantification of BCR clonotypes and the confident identification of true somatic variants from technical artifacts.

High-Throughput, Paired-End Sequencing

Libraries are sequenced on cutting-edge Illuminating platforms, generating high-depth, paired-end reads. This strategy facilitates the accurate, full-length assembly of the V(D)J variable region, ensuring that the crucial CDR3 domain and flanking framework regions are captured with exceptional fidelity. The sequencing depth is scalable to meet the demands of detecting rare clones within complex repertoires.

Proprietary Bioinformatics Pipeline

The massive datasets generated are processed through our specialized bioinformatics suite, which is tailored to handle feline BCR sequences. It integrates reference-based gene annotation against the latest feline immunoglobulin gene databases, sophisticated error correction, and a suite of advanced analytical modules for comprehensive repertoire characterization.

Advance Your Research with Cat-Specific BCR Profiling. Contact Us Now.

A Comprehensive Analytical Workflow

Creative Biolabs provides a complete end-to-end solution for Feline BCR Repertoire Profiling:

STEP	ITEM	DETAIL
1	Total RNA Isolation and Quality Control	The process begins with the extraction of high-quality total RNA from client-provided B-cell populations, which can be sourced from diverse tissues such as peripheral blood mononuclear cells (PBMCs), spleen, lymph nodes, or bone marrow. RNA integrity and purity are rigorously assessed to guarantee that the starting material is suitable for downstream applications, preventing loss of repertoire complexity.
2	cDNA Synthesis and Feline-Specific Amplicon Generation	High-quality RNA is reverse-transcribed into complementary DNA (cDNA). Subsequently, the variable regions of both IGH and IGL chains are amplified using our optimized 5' RACE-based protocol. This targeted amplification generates a library of amplicons representing the expressed BCR repertoire, ready for high-throughput sequencing.
3	High-Throughput Sequencing and Quality Filtering	The prepared amplicon libraries are subjected to deep sequencing on our advanced platform. An uncompromising quality control protocol is applied to the raw sequencing data; only high-quality, successfully paired reads that can be assembled into full-length V(D)J sequences are retained for subsequent analysis, eliminating low-quality data that could compromise the integrity of the results.
4	Comprehensive Bioinformatic Analysis	The curated sequence data is fed into our proprietary bioinformatics pipeline, which performs an in-depth analysis to extract key immunological insights. The final deliverables include, but are not limited to: V(D)J Gene Usage and Combination Analysis: Quantitative profiling of the utilization frequency of different V, D, and J gene segments and their pairing combinations. CDR3 Analysis: Characterization of the length distribution, amino acid composition, and physicochemical properties of the CDR3 region—the primary determinant of antigen-binding specificity. Somatic Hypermutation (SHM) Profiling: Analysis of the frequency, location, and substitution patterns of SHM within the V-gene segments, providing insights into affinity maturation. Clonotype Analysis: Identification, quantification, and lineage tracking of B-cell clones to monitor clonal expansion or contraction in response to stimuli.

Bridge the Gap in Feline Immunology. Partner with Creative Biolabs.

Driving Discovery: From Basic Research to Therapeutic Development

The detailed repertoire data generated by our service provides a powerful tool to advance a wide spectrum of research and development activities. Key applications include:

Fundamental Feline Immunology

Establishing a normative baseline for the healthy feline BCR repertoire, creating an essential reference for all future studies. This allows for the systematic investigation of how the repertoire is altered by age, vaccination, or environmental factors.

Infectious Disease and Cancer Research

Delineating the immunological signatures of disease by comparing the BCR repertoires of healthy versus diseased animals. Such studies can reveal mechanisms of pathogenesis, identify public (shared) clonal responses, and uncover potential biomarkers.

Therapeutic Antibody Discovery

Mining the natural feline immune repertoire for high-affinity, antigen-specific antibodies. By identifying natively optimized BCR sequences from convalescent or immunized animals, this approach can dramatically accelerate the development pipeline for feline therapeutic monoclonal antibodies, bypassing the need for extensive in vitro engineering.

Diagnostics and Biomarker Development

Identifying unique BCR clonotypes or repertoire patterns strongly associated with specific disease states. These signatures can serve as highly specific biomarkers for early diagnosis, prognosis, or monitoring treatment efficacy.

Validation of Feline Disease Models

Quantitatively assessing the fidelity of the feline immune response in models of human disease. By comparing the BCR repertoire dynamics in cats to those observed in human patients, researchers can obtain critical data to validate the relevance and predictive power of the animal model.

Transform Your Veterinary Research with High-Resolution BCR Analysis. Learn More.

Other Species

Our core platform technology and analytical principles have been successfully adapted to a diverse array of species, reflecting our deep commitment to comparative immunology. We proudly offer specialized BCR repertoire profiling services for:

Fig.4 Images containing cats, alpacas, pigs, rabbits, and dogs. (Creative Biolabs AI)

Zebrafish Antibody Repertoire Analysis

Alpaca BCR Repertoire Profiling

Canine BCR Repertoire Profiling

Rabbit BCR Repertoire Profiling

Swine BCR Repertoire Profiling

This broad capability enables cross-species immunological studies and supports veterinary and biomedical research across a wide phylogenetic spectrum.

Creative Biolabs Advantages

Species-Tailored Assay Design

Eliminates inefficiencies and analytical artifacts that arise from applying generic, non-feline-specific protocols, ensuring comprehensive and accurate repertoire capture.

Accelerated Discovery of Therapeutic Leads

Directly supports the development of feline-specific biologics, substantially reducing the timelines and costs associated with traditional antibody discovery methods.

Proprietary High-Fidelity Sequencing Platform

Provides the sensitivity and precision required to detect rare but functionally important B-cell clones and to accurately quantify repertoire dynamics, even in complex disease states.

Accessible High-Throughput Science

Lowers the barrier to entry for academic labs, veterinary clinics, and biotechnology companies, fostering broader engagement in feline immunology and therapeutic development.

Discover the Future of Feline-Specific Therapeutics. Get in Touch with Our Experts.

FAQs

Q: What are the sample submission requirements for the service?
A: We accept a range of sample types, including cryopreserved PBMCs, B cells isolated by sorting, and fresh or frozen tissues such as spleen, lymph nodes, and bone marrow. For optimal results, we recommend a minimum of 1 million B cells or an equivalent amount of tissue. Please contact our technical support team for detailed sample preparation and shipping guidelines.
Q: What is the typical sequencing depth provided, and is it customizable?
A: Our standard service provides deep sequencing coverage, typically yielding hundreds of thousands to millions of unique, full-length V(D)J reads per sample, which is sufficient for most research applications. However, the sequencing depth is fully customizable. We can tailor the project scope to meet specific needs, such as the requirement for ultra-deep sequencing to detect extremely rare clones.
Q: Can you analyze both heavy and light chain repertoires from the same sample?
A: Yes. Our service is designed to profile both the immunoglobulin heavy chain (IGH) and the light chains (IGK and IGL) from the same initial RNA sample. This enables a more complete characterization of the antibody repertoire, including analysis of heavy/light chain pairing preferences in some contexts.
Q: What is the format of the final data deliverables?
A: Clients receive a comprehensive data package that includes raw sequencing data (FASTQ files), processed and annotated sequence lists, and a detailed summary report. The report presents key findings in publication-ready figures and tables, including V(D)J gene usage statistics, CDR3 length distribution plots, clonotype frequency analysis, and SHM reports. Further custom bioinformatics analysis is also available upon request.

Leverage Our Profiling Expertise. Request a Quote.

All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.

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