Purified Cynomolgus Macaque Monkey CD4 T Cells

Purified Cynomolgus Macaque Monkey CD4 T Cells


  • CD4 T cells purified from cynomolgus macaque PBMCs by magnetic selection
  • Used for a wide variety of safety assessment and functional assays
  • Carefully cryopreserved to ensure high viability upon thawing
  • All orders come with an iQ Certificate of Analysis
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About the Cynomolgus Monkey (or Cynomolgus Macaque)

The cynomolgus macaque is the most commonly utilized non-human primate in biomedical research.  According to some researchers, these monkeys are ideal models due to the 90-93% genetic similarity to and recent evolutionary divergence from humans.  They are employed in numerous research areas, such as immunology, neuroscience, oncology, diabetes, and pharmacology due to their genetics and physiology.

Cynomolgus Macaque Monkey CD4 T Cells

Cynomolgus CD4 T cells make up approximately 25-47% of PBMCs in a typical adult monkey. These cells carry the CD4 protein marker and the T cell receptor (TCR), which recognizes foreign antigens presented by major histocompatibility complex class II molecules on antigen presenting cells to activate them.

CD4 T cells develop in the thymus to become mature T cells and exit the thymus to reside and encounter foreign pathogens in lymphoid tissues.

When activated, CD4 T cells become T helper subsets to secrete cytokines to boost the immune response. Depending on the helper subset and cytokine released, the humoral (antibody-based) or cell-mediated immune response is elaborated.

CD4 T Cell Application Summary

Purified cynomolgus CD4 T cells are a good source of cells to study the biology of CD4 T cells and their role in the immune system. They can be used for a variety of stimulation-dependent functional experiments to assess cytokine production and proliferation.

With the current trend toward development of immuno-modulatory drugs, CD4 T cells are an ideal source of cells to test cytokine response in the presence of therapeutic molecules.  More importantly, cynomolgus T cells can be used to assess toxicity and safety characteristics of these biologics in the presence of CD4 T cell activation before first in-human trials.  These cells are commonly employed in pre-clinical settings to ensure biologics are not eliciting unwanted functions, specifically from CD4 T cells.

The negative isolation of CD4 T cells leaves them untouched without any antibody binding to cell surface markers that may influence function. This method leaves all cell surface proteins eligible to be bound to antibodies or other molecules for functional or population characterization studies.

In contrast, positive isolation of CD4 T cells may lead to internalization of the marker that was used to isolate the cells.  In most cases, these markers are only used for identification purposes and may not have any effect on function, but it will depend on the organism and function.  Therefore, cells isolated using this method may also be employed for functional or population characterization studies with the knowledge that the isolation marker may be internalized and not present.

CD4 T Cell Purification

Collection of samples

Cynomolgus PBMCs were sourced from a responsible third party vendor that operate according to local regulations and laws.

Isolation of Cyno CD4 T cells

To enrich for cyno CD4 T cells by the negative isolation method, PBMCs were incubated with antibodies against CD8 T cells, B cells, NK cells, dendritic cells, monocytes, granulocytes, and erythrocytes, and subsequently subjected to a magnet. Cells labeled with the antibodies bound to the magnet through the test tube wall, while unlabeled cells, the CD4 T cells, were decanted into a fresh tube to obtain the enriched population.

For the positive selection method, PBMCs were incubated in a test tube with antibodies against a CD4 T cell-specific marker and subsequently subjected to a magnet, similar to negative isolation.  However, the cells that were decanted into the fresh test tube were the non-CD4 T cells, which can be used for other purposes, while the labeled CD4 T cells were left bound to the magnet through the test tube wall.  The test tube was then removed from the magnet to release the purified CD4 T cells directly into the test tube.

Contact us for more information about purchasing our magnetically isolated CD4 T cells.


A small aliquot of Cyno CD4 T cells was tested for post-sort purity by flow cytometry analysis. Purity of CD4 T cells, as defined by CD4 expression, was > 97% (Figure 1).

Cyno monkey CD4 T cells Pre and Post sort purity

Figure 1. Purity of Cyno CD4 T cells after negative magnetic isolation from PBMCs.  In this representation, cynomolgus PBMCs were incubated with antibodies against CD8 T cells, B cells, NK cells, dendritic cells, monocytes, granulocytes, and erythrocytes and subjected to negative magnetic isolation to obtain untouched CD4 T cells.  A small aliquot was taken after selection to evaluate post-sort purity (right).  Percent of CD4+ cells in PBMCs is also shown (left).

Cryopreservation and storage

Purified CD4 T cells were cryopreserved carefully using iQ Biosciences’ cryopreservation protocol that ensures high viability (> 90%) after thawing.

Cells should be stored at < -120 °C once they are received, such as within a liquid nitrogen tank (vapor phase).

Additional information

Available Size(s)


Cell Type



Tissue Type


> 90%

Please let us know in the notes section during checkout if you are interested in animal donor-matched PBMCs, as we carry these in stock.

If you would like to request multiple animal donors or the same animal donor, please specify this in the notes section as well.

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We are Committed to Ethical Practices

iQ Biosciences’ primary cell products from non-human primates are collected under approved IACUC protocol, which was developed in consultation with the Attending Veterinarian and is consistent with current veterinary standards. The collection facility is AAALACi and PHS accredited, and all animal housing, handling, and research protocols are consistent with standards set forth by the Animal Welfare Act, NIH's Policy on Humane Care and Use of Animals and the Guide for the Care and Use of Animals. All animal housing and handling is done in such a way to minimize stress and risk of injury to the animal.

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Your research is important to us. Our scientists will work through each step of the process with you, including assay design, data analysis, and recommendations for future studies.

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We're experts- so you don't have to be. Augmenting years of experience in immunology and working with immune assays, our scientists stay current with the latest publications and technology.

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For US customers, we ship via FedEx Overnight Shipping. Shipping charges will vary per shipping address (based on ZIP code) and are estimated to be $110.

For international (non-US) customers, we work closely with you and our couriers to ensure all necessary documentation is in place for international shipments to significantly reduce the chance of delays at Customs. For the export of non-human primate samples, this includes preparing CITES permits, as well as any other documentation as required by country. Please submit an inquiry to orders@iqbiosciences.com for your estimated time of delivery and shipping charges.

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