Cytokine Storm, also known as Hypercytokinemia or Cytokine Release Syndrome (CRS), is a systemic inflammatory response that results in the uncontrolled release of large quantities of pro-inflammatory cytokines due to over-activation of the immune system. These cytokines include Tumor Necrosis Factor-α (TNF-α), Interleukin-1 (IL-1), Interleukin-6 (IL-6), and Interferon-γ (IFN-γ). They are supposed to assist the body in removing pathogens, but in excess, they attack their own tissues indiscriminately, triggering multi-organ dysfunction and even failure.

 

In COVID-19 critically ill patients, cytokine storm is an important cause of Acute Respiratory Distress Syndrome (ARDS) and multi-organ failure. Studies have shown that SARS-CoV-2 virus induces an overreaction of the immune system, contributing to a dramatic increase in cytokine levels in lung tissues, which triggers pulmonary edema, pulmonary fibrosis, and systemic inflammatory responses, ultimately placing patients in a critical condition.

 

 

 

1. Triggers
Cytokine Storms can be triggered by a variety of factors, including:
Infectious factors: e.g. viral (SARS, MERS, COVID-19), bacterial (sepsis), fungal and other serious infections.
Non-infectious factors: e.g. Autoimmune Diseases, Tumor Immunotherapy (CAR-T cell therapy, immune checkpoint inhibitors).
Genetic factors: Certain gene mutations may lead to abnormal regulation of the immune system and increase the risk of cytokine storm.

2. Occurrence Mechanism
Over-activation of immune cells: After pathogen invasion, immune cells (e.g., macrophages, neutrophils, NK cells) are activated and release large amounts of pro-inflammatory cytokines.
Uncontrolled positive feedback loop: cytokines further activate more immune cells, forming a “cytokine-immune cell” positive feedback loop, leading to an inflammatory cascade.
Increased vascular permeability: Cytokines damage vascular endothelial cells and increase vascular permeability, leading to tissue edema and inadequate organ perfusion.
Multi-organ dysfunction: Continuous inflammatory response leads to apoptosis and necrosis of organ cells, which eventually leads to multi-organ failure.

3.Key Cytokines
 

Cytokine	Function	Role
TNF-α	Promotes inflammatory response, induces apoptosis	Activates neutrophils and endothelial cells, exacerbating tissue damage
IL-1	Mediates fever, inflammatory response	Promote the release of other cytokines to amplify inflammation
IL-6	Promotes B-cell differentiation, acute inflammatory response	Induces hepatic synthesis of acute response proteins, exacerbating the inflammatory response
IFN-γ	Activation of macrophages, enhancement of immune response	Promotes Th1 cell differentiation and exacerbates tissue damage
IL-10	Anti-inflammatory, suppresses immune response	Possible protection in cytokine storms

III.Precision Testing: Catching the “Signs” of Cytokine Storms

1. Detection Indicators
Inflammatory markers: C-Reactive Protein (CRP), Ferritin (FE), Procalcitonin (PCT), etc.
Cytokines: IL-6, TNF-α, IFN-γ, IL-10, etc.
Coagulation function: D-dimer, fibrinogen, etc.

2. Detection Methods
Enzyme-linked immunosorbent assay (ELISA): as the gold standard for cytokine detection, ELISA has the advantages of high sensitivity, high specificity and easy operation.
Gene expression analysis: cytokine mRNA level is detected by real-time fluorescence quantitative PCR (qPCR), reflecting the trend of cytokine synthesis.

3. Detection Strategies
Dynamic monitoring: During immunotherapy or severe infections, cytokine levels are regularly tested to detect early signs of cytokine storms promptly.
 

IV.Product Recommendation: Precision Testing for Research Decision Making

Jonlnbio | Cytokine ELISA Kits

In detecting cytokine storm-related indicators, ELISA has become the tool of choice in scientific research by its high sensitivity, high specificity and simplicity of operation. The cytokine ELISA Kit launched by our company has the following significant advantages:

High sensitivity: High-quality antibodies and an optimized reaction system can detect cytokines at low concentrations to ensure the accuracy of the results.
Wide applicability: Applicable to serum, plasma, cell culture supernatant and other sample types to meet diversified testing needs.
Easy to use: ready-to-use reagents, no need for complex preparation, standardized experimental procedures, saving time and cost.
Reliable quality: Strict Quality Control and validation ensures that Inter and Intra-batch differences are minimized and results are stable and reliable.

Recommended Products:
 

Cytokine	Tumor Necrosis Factor-α (TNF-α)
	Interleukin-1β(IL-1β)
	Interleukin-6 (IL-6)
	Interleukin-10（IL-10）
	Interferon-γ (IFN-γ)
Inflammation Marker	C-Reactive Protein (CRP)
	Ferritin (FE)
	Procalcitonin (PCT)
Coagulation Function	D-dimer (D2D)
	Fibrinogen(Fbg、FGα、FGβ、FGγ)
	Coagulation Factor(F2、F5、F10、F8、F9、F11、F12)

Jonlnbio Products Citations:
 

Cytokine nanosponges suppressing overactive macrophages and dampening systematic cytokine storm for the treatment of hemophagocytic lymphohistiocytosis.
[JL20691] Mouse Lipopolysaccharides(LPS) ELISA Kit	Mouse	Bioactive Materials	18.0
Inhaled ACE2-engineered microfluidic microsphere for intratracheal neutralization of COVID-19 and calming of the cytokine storm.
[JL20691] Mouse Lipopolysaccharides(LPS) ELISA Kit [JL10967] Mouse Interferon Gamma (IFN-γ) ELISA Kit	Mouse	Matter	17.3

References:

1. Yang L , Xie X , Tu Z ,et al.Correction: The signal pathways and treatment of cytokine storm in COVID-19[J].Signal transduction and targeted therapy, 2021, 6(1):326.DOI:10.1038/s41392-021-00744-8.
2. Karki R , Kanneganti T D .The 'cytokine storm': molecular mechanisms and therapeutic prospects[J].Trends in Immunology, 2021, 42(8).DOI:10.1016/j.it.2021.06.001.
3. David C. Fajgenbaum, M.D., and Carl H. June, M.D.Cytokine Storm[J].The new england journal o f medicine, 2020;383:2255-2273.DOI: 10.1056/NEJMra2026131.
4. Hu B , Huang S , Yin L .The cytokine storm and COVID[J].Journal of Medical Virology, 2020, 93(10).DOI:10.1002/jmv.26232.