Lyophilized Exosome Standards

The purest lyophilized standards from human biofluids and different cell culture media.

Lyophilization is a useful technique that can be used for long-term stable preservation of exosomes. Besides, lyophilized exosome can be used as control standards for FACS, WB, ELISA and other applications, as well as quantitative calibration standards for foreign and domestic exosomes in biological samples.

Immunostep Lyophilized exosome standards can be used as control standards for multiple applications, as calibration standards for biomarkers from biological samples and for immunocapture performance evaluation.

High pure exosomes improving performance over competitors

Purity validated by WB, NTA, Cytometry and functional analysis in vitro.

Tested and validated for regenerative medicine, skin, dermatological and pharma companies.

The purest lyophilized Exosome standards

Lyophilized exosome standards easy to transport and storage and is stable for over 2 years at 2°C to 8ºC.  Immunostep provides the highest quality lyophilized exosome standards isolated from a variety of biological sources, including cell culture supernatant, human plasma, serum, urine, and saliva. Exosomes are isolated by differential ultracentrifugation.

Biofluids or Cell Culture Media

Sample Collection

Purification via ultracentrifuge

Lyophilization and Quantification

Guaranteed performance validated by WB, NTA, Cytometry and functional analysis in vitro.

All exosome standard batches are validated using FCM, WB and NTA Analysis. Additionally, in order to compare the effects of lyophilization process we compare all lyophilized batches with respect to fresh exosomes stored at -20ºC. Dynamic range of fresh and lyophilized PC3 exosomes are analysed by flow cytometry

Figure 1: Relationship between background noise and specific signal at different exosome concentrations. Exosomes were captured by CD63+ (CloneTEA3/18) capture beads and subsequently detected by Anti-CD9PE (CloneVJ1/20).

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Batch Validation: High quality and pure standards

For its validations we carry out an exosome analysis and comparative of fresh  and lyophilized plasma exosomes for particle size and concentration by NTA, NanoSightLM10HSB. This analysis is carried out with 1 μl of purified exosomes diluted in 999 μL of HEPES buffer (dilution1:1000). The purified exosomes show  a size distribution profiles, with peak diameters from 50 –150 nm and concentrations about 1x1010exosomes/ml. Additionally, fresh, and lyophilized MCF-7 exosome batches are analysed and compared by WB in native conditions for exosomal markers, by anti-CD9 (Clone VJ1/20) and anti-CD63 (Clon TEA3/18) antibodies at a 1:1000 dilution (0,1 mg/m).


Kit NameKit Description
Exosomes From PC-3

Human metastatic prostate cancer cell line | ExoPC3  | 100µl

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Exosomes From HT-29

Human metastatic colon cancer cell line | ExoHT29  | 100µl

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Exosomes From MCF-7

Human metastatic prostate breast cell line | ExoMCF7  | 100µl

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Exosomes From A-375

Human malignant melanoma cell line | ExoA375  | 100µl

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MSCs Derived Exosomes

Adipose-derived Mesenchymal stem/stromal Cells (MSCs) derived exosomes| ExoMSC  | 100µl

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Exosomes from RPMI

RPMI Cell Line | ExosRPMI | 100μg

Exosomes From CaCo2

A human colon cancer cell line | ExoCaCo2 | 100μg 


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