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ICE2

A Mysterious Gene That May Be Connected to Asthma (ICE2)

Written by Jasmine Foster, BSc, BEd on October 30th, 2020
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ICE2 encodes a regulatory protein with a very poorly-studied mechanism. How might it be connected to allergic asthma? Read on to learn more.

Summary

ICE2 encodes interactor of little elongation complex ELL subunit 2. Variants of ICE2 may play a role in asthma by affecting the transformation of blood cells. Lifestyle, diet, and supplement modifications may counteract the effects of these variants by preventing the overproduction of Th2 cells and cytokines.

ICE2 and Asthma

The ICE2 gene encodes a protein called interactor of little elongation complex ELL subunit 2, which regulates how messages are sent within the nucleus of the cell [R, R].

Genome-wide association studies have found two variants in the ICE2 gene that were associated with asthma. However, research into the mechanism of this connection is very scarce [R, R, R].

ICE2 helps move proteins and messenger molecules into a part of the cell where they can combine into larger complexes and thereafter perform whatever function they perform. This gene and protein are present in animals, plants, yeasts, and other organisms, suggesting an essential role and ancient origin [R, R].

In yeast, ICE2 stabilizes CYP enzymes, which break down drugs and other active compounds, but it is unclear whether this function is conserved in animals. In mammals such as dogs, the ICE2 gene has been studied in the context of blood cell plasticity; that is, the ability of blood cells to change their structure and function depending on what kind of immune response is needed [R, R].

This possible connection to the immune system via blood cells may be the most promising lead for explaining ICE2’s association with asthma. However, more details are currently lacking [R].

The ICE2 gene encodes a protein that may affect how white blood cells transform according to what kind of immune response is needed, but its mechanism is poorly studied.

Your ICE2 Results for Asthma

SNP Table

variant genotype frequency risk allele
rs11071559
rs10519067

 

ICE2 rs11071559

  • ‘C’ = Associated with relatively higher rates of allergic asthma
  • ‘T’ = Possibly protective against allergic asthma
  • The ‘T’ allele may affect the transformation of white blood cells and influence the immune response [R].

ICE2 rs10519067

  • ‘G’ = Associated with relatively higher rates of allergic asthma 
  • ‘A’ = Possibly protective against allergic asthma
  • The ‘A’ allele may affect the transformation of white blood cells and influence the immune response [R].

 

Recommendations

Light Therapies

In animals with allergic asthma, low-level laser therapy (LLLT, a type of specialized light therapy) reduced Th2 inflammation in the airway [R].

A meta-analysis of 13 studies concluded that light therapy (with UV, blue, red, and infrared radiation) applied through the nose can relieve allergic rhinitis symptoms and improve quality of life. However, the authors warned about the heterogeneity and low quality of the studies [R].

Some wavelengths of light may reduce airway inflammation by reducing Th2 inflammation.

Vitamin E

Vitamin E is believed to play a central role in regulating the balance between Th1 and Th2 cell formation. If ICE2 is important for white blood cell transformation as some researchers suggest, then vitamin E could be part of the same regulatory systems [R, R].

Several studies have associated high intake of vitamin E with a reduced incidence of asthma, while a diet poor in this vitamin increases the risk. Similarly, some people with asthma have lower levels of this vitamin in the blood and lungs [R, R, R, R, R].

Food sources of vitamin E include wheat germ, nuts, sunflower and sesame seeds, and their respective plant oils [R].

Vitamin E may be a part of the same regulatory mechanisms that determine how white blood cells develop into Th1 or Th2 cells. High vitamin E intake is also associated with low incidence of asthma.

Quercetin

Quercetin, a common polyphenol found in many fruits and vegetables, reduced the number of Th2 cells and the production of Th2 inflammatory signals in a cell study [R].

Quercetin is recognized as one of the best natural antihistamines. In one human trial, quercetin even outperformed Cromolyn, a mast cell-stabilizing drug; quercetin was more effective for prevention, while Cromolyn worked more quickly once the histamine reaction had already started [R, R].

Preliminary clinical research shows that a formulation with quercetin added to conventional therapy reduced the symptoms of asthma and rhinitis, and the need for medication [R]. 

Food sources of this flavonoid include vegetables such as capers, onions, eggplant, celery, and asparagus, fruits such as berries, apples, and oranges, nuts, and tea (both green and black) [R].

Quercetin is a common dietary polyphenol that may reduce Th2 cell count and prevent allergic inflammation.

Author photo
Jasmine Foster
BSc, BEd

Jasmine received her BS from McGill University and her BEd from Vancouver Island University.

Jasmine loves helping people understand their brains and bodies, a passion that grew out of her dual background in biology and education. From the chem lab to the classroom, everyone has the right to learn and make informed decisions about their health.

Disclaimer

The information on this website has not been evaluated by the Food & Drug Administration or any other official medical body. This information is presented for educational purposes only, and may not be used to diagnose or treat any illness or disease.

Also keep in mind that the “Risk Score” presented in this post is based only on a select number of SNPs, and therefore only represents a small portion of your total risk as an individual. Furthermore, these analyses are based primarily on associational studies, which do not necessarily imply causation. Finally, many other (non-genetic) factors can also play a significant role in the development of a disease or health condition — therefore, carrying any of the risk-associated genotypes discussed in this post does not necessarily mean you are at increased risk of developing a major health condition.

Always consult your doctor before acting on any information or recommendations discussed in this post — especially if you are pregnant, nursing, taking medication, or have been officially diagnosed with a medical condition.

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