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ELISA applied in research

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Cytokines are a group of signaling proteins that play a crucial role in various physiological processes such as immune regulation, cell differentiation, cell proliferation and chemotaxis. Cytokines are produced by various cell types in many vertebrate species and are active at very low concentrations, usually in the picogram to femtogram range. Cytokines are usually produced transiently and locally, act paracrine or autocrine and interact with cell surface receptors with high affinity specific to each cytokine or cytokine group. Cytokines include chemokines, interferons (IFNs), interleukins (ILs) and tumor necrosis factors (TNFs). Chemokines are a family of small cytokines (classified into four main subfamilies: CC, CXC, CX3C and C), that can mediate chemoattraction between cells. Some chemokines are homeostatic in nature and are constitutively produced and secreted, while others are considered inflammatory and are only produced by cells during infection or a pro-inflammatory stimulus.

Naive T cells are multipotential and can differentiate into different T helper cell subsets. T helper (Th) 1 cells, which mainly produce IFN-γ,  IL-2 and TNF-α, are induced by IL-12. Th1-like cytokines interact with cytotoxic T lymphocytes and macrophages. Th2 cells, interact with B cells, are induced by IL-4 and IL-33, and secrete IL-4, IL-5, IL-13 and IL-31. Th17 cells, induced by IL-6, TGF-β and IL-23, secrete IL-17A, IL-17F, IL-6, TNF-α, GM-CSF, IL-21 and IL-22. TGF-β in the absence of IL-6 is necessary for the induction of regulatory T cells (Tregs). These Tregs may produce IL-10 and TGF-β. IL-6 in the absence of TGF-β can induce follicular T helper cells (Tfh) that mainly produce IL-21. IL-6 and TNF-α promote the differentiation into Th22 cells that secrete IL-22, IL-13 and TNF-α. Th9 cells are induced by TGF-β and IL-4 and mainly produce IL-9 and IL-10.

T helper cell subsets

Another important group of effector proteins involved in the immune system are perforin and granzymes. Granzymes and perforin are released by cytotoxic T cells and natural killer cells to induce apoptosis in their target cells.

Signaling proteins are best be detected and measured using ELISA techniques. U-CyTech has developed several high-quality ELISA kits for the detection of cytokines and granzymes for human, monkey (including macaques and marmoset), mouse and rat models. These assays are widely applied in different research fields, including basic research1,2,3,4,5 and in different research fields, including cancer research6,7, vaccine development8,9, infectious diseases10,11,12 and autoimmune diseases13. Hundreds of peer-reviewed publications describe the successful use of U-CyTech’s ELISA systems and/or apply our high affinity antibodies in other immunoassays. Please find these references in our Reference database.

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Examples of studies in different research areas using one or more of our ELISA products:

Click on the authors for the abstract of the below mentioned acticles.

  1. Hafkamp FMJ et al. (2022). Vitamin D3 priming of dendritic cells shifts human neutrophil-dependent Th17 cell development to regulatory T cells. Front Immunol. 13: 872665.
  2. Russo C et al. (2022). Bud-poplar-extract-embedded chitosan films as multifunctional wound healing dressing. Molecules 27: 7757.
  3. Wu CH et al. (2019). Extracellular vesicles derived from natural killer cells use multiple cytotoxic proteins and killing mechanisms to target cancer cells. J Extracell Vesicles 8(1): 1588538.
  4. Willis EL et al. (2021). Effects of chronic viral infection on lymphocyte population in middle-aged baboons (Papio anubis). Comp Med. 71(2): 177-187.
  5. Liu Z et al. (2022). P311 facilitates the angiogenesis and would healing function of MSCs by increasing VEGF production. Front Immunol. 13: 821932.
  6. Dong L et al. (2013). Human prostate stem cell antigen and HSP70 fusion protein vaccine inhibits prostate stem cell antigen-expressing tumor growth in mice. Cancer Biother. Radiopharm. 28: 391-7.
  7. Mirandola L et al. (2015). Novel antigens in non-small cell lung cancer: SP17, AKAP4, and PTTG1 are potential immunotherapeutic targets. Oncotarget. 6: 2812-26.
  8. Desallais L et al. (2016). Immunization against an IL-6 peptide induces anti-IL-6 antibodies and modulates the Delayed-Type Hypersensitivity reaction in cynomolgus monkeys. Sci. Rep. 6: 19549.
  9. Hussein J et al. (2018). A phase I, open-label trial on the safety and immunogenicity of the adjuvanted tuberculosis subunit vaccine H1/IC31® in people living in a TB-endemic area. Trails. 19: 24.
  10. Nelson M and Loveday M (2015). Exploring the innate immunological response of an alternative nonhuman primate model of infectious disease; the common marmoset. J. Immunol. Res. 2014: 913632.
  11. Okeke CC et al. (2020). Comparison of the levels of some hemostatic and inflammatory markers between tuberculosis patients with and without malaria at pretreatment, intensive, and continuation phase treatment. Int J Mycobacteriol. 9(4): 373-379.
  12. Hoepel W et al. (2021). High titers and low fucosylation of early human anti-SARS-CoV-2 IgG promote inflammation by alveolar macrophages. Sci. Transl. Med. 13(596): eabf8654.
  13. Singh S et al. (2015). Anti-inflammatory and antiarthritic activity of UNIM-301 (a polyherbal unani formulation) in Wistar rats. Pharmacognosy Res. 7: 188-92.