Cytokine Analysis Services

Cytokines are the signaling currency of the immune system, and measuring them serves two distinct purposes in preclinical work. In efficacy studies they provide mechanistic evidence that an immunotherapy engaged the immune system rather than acting through some other route. In safety assessment they are the readout for cytokine release, which is the dose-limiting toxicity for T-cell engaging agents and a central concern for cell therapy products.

Altogen Labs provides cytokine quantification in plasma, serum, tumor lysate, and other tissue by ELISA and by multiplex methods, integrated into immuno-oncology, pharmacology, and safety studies. To discuss a cytokine panel, request a quote.

Single-analyte and multiplex approaches

ELISA quantifies one analyte with high sensitivity and a well-characterized dynamic range, and remains appropriate where a single cytokine is the defined endpoint or where the required sensitivity exceeds what a multiplex format delivers.

Multiplex methods quantify many analytes from a small sample volume simultaneously, which matters disproportionately in rodent studies where plasma volume is limited and a broad panel by single-analyte ELISA would be impossible. The trade-off is that dynamic range and sensitivity are compromises across the panel rather than optimized for any one analyte, so an analyte at the extreme of its range may be better measured separately.

Panels commonly include interferon gamma, interleukin 2, tumor necrosis factor alpha, and interleukin 6, extended according to the mechanism under study.

Timing determines what is measured

Cytokine responses are transient, frequently peaking within hours of administration and resolving before the next scheduled sampling point. A study sampling only at trough will record no cytokine response from an agent that produced a substantial one, and that null result will be indistinguishable from genuine absence.

Sampling schedule is therefore designed around the expected kinetics of the mechanism rather than around convenience, with early timepoints concentrated where the response is expected. Where kinetics are unknown, a pilot time course establishes them before the main study commits to a schedule.

Sample handling

Cytokine measurements are sensitive to pre-analytical handling to a degree that catches out studies otherwise well designed. Anticoagulant choice, time between collection and centrifugation, centrifugation conditions, and the number of freeze-thaw cycles all affect measured concentrations, and inconsistency between animals or timepoints introduces differences that appear biological. Collection protocol is fixed before the study opens and applied uniformly, with aliquoting at first freeze so that repeat analysis does not require thawing a sample twice.

Applied examples

Bispecific therapeutic index. A CD3-engaging antibody is administered across a dose range with cytokines sampled densely in the hours following the first dose, defining the dose at which tumor activity is achieved without the cytokine elevation that would limit clinical use.

Mechanism confirmation. Interferon gamma is measured in tumor and plasma alongside CD8 infiltration in a checkpoint inhibitor study, linking tumor control to effector activation rather than reporting growth inhibition alone.

Cell therapy safety signal. Cytokines are followed after administration of an engineered cell product in a humanized model, characterizing the release profile in a system containing human immune cells capable of producing it.

Assay validation and reporting

Standard curves are run with every plate, and samples falling outside the validated range are diluted and repeated rather than extrapolated. Spike recovery in the relevant matrix is assessed where the matrix differs from that in which the assay was validated, since tumor lysate and plasma are not interchangeable. Reports state the platform, panel composition, dilution factors, standard curve performance, and per-animal values, with samples below the limit of detection reported as such rather than assigned a zero.

Send analytes of interest, matrix, and expected response kinetics, or request a quote.