Exosome Isolation & Characterization Service

High-quality exosome isolation and characterization are the foundation of cancer biomarker discovery, liquid biopsy development, and targeted therapeutic delivery. At Alfa Cytology, we provide comprehensive exosome isolation and characterization services tailored to diverse biofluids and research objectives, ensuring high-purity exosome recovery and accelerating your oncology preclinical programs through rigorous quality control.

Introduction to Exosome Isolation and Characterization

Exosomes are nanoscale extracellular vesicles (30–150 nm in diameter) actively secreted by nearly all cell types, including tumor cells. They carry a diverse array of bioactive molecules, including proteins, lipids, and nucleic acids (DNA, mRNA, miRNA, lncRNA, and circRNA), that precisely reflect the biological and pathological state of their parent cells. Within the tumor microenvironment (TME), exosomes serve as critical mediators of intercellular communication, transferring molecular signals between tumor cells, immune cells, and stromal cells to regulate tumor proliferation, angiogenesis, pre-metastatic niche formation, immune checkpoint activation, and acquisition of drug resistance. However, the research value of exosomes is highly dependent on isolation purity and characterization completeness. Efficiently obtaining high-purity, high-activity exosomes from complex biofluids, while removing cell debris, lipoproteins, soluble proteins, and other non-target vesicles, is essential to unlocking their full potential in preclinical applications.

In oncology preclinical research, high-purity exosome samples support the following core application areas:

Tumor Liquid Biopsy	Tumor Microenvironment Research	Targeted Therapy Development
Companion Diagnostic Development	Drug Resistance Mechanism Studies	Tumor Heterogeneity Analysis

Fig. 1 General procedures of different exosome isolation methods. (Hu C, et al.; 2022)

Our Services

At Alfa Cytology, our exosome isolation and characterization services support high-purity exosome recovery from diverse biofluids and clinical specimens, accelerating your biomarker discovery, mechanistic studies, and therapeutic development programs through integrated workflows and rigorous quality control.

Exosome Isolation Service

We offer flexible, sample-adaptive isolation solutions using multiple complementary techniques to achieve high-purity exosome recovery from diverse starting materials.

Exosome Characterization Services

Our rigorous characterization platform adheres to international guidelines—including MISEV recommendations and reference standards such as T/CRHA·001-2021 and T/FDSA 0049-2024—delivering comprehensive multi-parameter quality assessments.

Physical Characterization

• Particle Size and Concentration
• Morphology
• Hydrodynamic Size and Zeta Potential
• Aggregation Assessment

Biochemical Characterization

• Surface Markers (General)
• Surface Markers (High-Throughput)
• Tumor-Derived Markers
• Immunomodulatory Markers
• Purity Assessment

Cargo Integrity Assessment

• RNA Integrity
• Protein Quality
• Nucleic Acid Profiling

Our exosome characterization services also support safety and sterility testing, including endotoxin levels (< 0.5 EU/mL), microbiological contamination (sterility, mycoplasma, and viral markers), and bioburden (aerobic bacteria, anaerobic bacteria, and fungi).

Supported Downstream Therapy Development

Leveraging our high-purity, well-characterized exosomes, we support our clients in preclinical evaluation across a broad range of therapeutic areas, including but not limited to:

Small Molecule	Therapeutic Antibody	Cell Therapy	Gene Therapy
Cancer Vaccine	Peptide Therapy	Nucleic Acid Therapeutics	Oncolytic Viral Therapy

Alfa Cytology provides you with comprehensive solutions spanning sample processing, multi-parameter characterization, and quality data delivery. Leveraging our deep expertise in tumor biology and rigorous quality systems, we offer full-chain support from biomarker discovery to preclinical validation, accelerating your cancer research programs with speed, precision, and reproducibility. Please don't hesitate to contact us to discuss your project requirements and receive a customized service proposal.

For research use only.