Are you too thin suffering from chronic inflammation/autoimmune diseases such as IBD or Th1/Th17 dominance? Obese? Do you have cancer?
If so, then there’s a good chance that STAT3 is contributing to your problems.
STAT3 is a protein that binds to DNA and increases the expression of certain genes.
The STAT3 pathway is used by a variety of cytokines, hormones and growth factors to increase blood cell formation, immune cell development, stem cell maintenance, and growth. However, chronic activation of STAT3 underlies various diseases or disorders, such as cancer or obesity .
The Benefits of STAT3
STAT3 is able to activate several pathways related to liver regeneration and acute inflammatory reaction after liver injury .
Less STAT3 can contribute to fatty liver disease, and STAT3 gene variants are associated with it .
In obesity, chronic STAT3 is activated in the brain by increased leptin levels leading to the development of leptin resistance, whereas in the peripheral organs chronic IL-6-induced JAK-STAT3 impairs insulin action. We report the consequences of chronic JAK-STAT3 induced signaling as present under obese conditions in the main metabolic organs .
Cells/tissues without STAT3 shows impaired pathogen response .
When cells completely lose STAT3 function people can develop excess IgE responses .
Mice lacking STAT3 specifically in the liver have insulin resistance and glucose intolerance when fed a high-fat diet and restoration of STAT3 expression in these mice corrected the abnormalities .
STAT3 plays an important role in the induction of liver acute-phase genes in response to bacterial LPS .
The Negatives of STAT3
All in all, STAT3 plays an important role in autoimmune and inflammatory diseases and some cancers.
The Thin/Inflammation Phenotype vs The Obese Standard American
A question I ponder sometimes is that the people who are thin in some ways are more likely to have inflammation problems.
There are many reasons for this. For example, one reason I mentioned previously has to do with PPAR gamma.
STAT3 is another one of those proteins which if inhibited or if it’s not working right will cause insulin and leptin resistance and obesity.
On the other hand, if it’s overactive, it will cause autoimmune conditions, inflammation, and cancer.
So STAT3 has good and bad properties. You can look at your genes at the end.
Natural STAT3 Inhibitors
- Pathways: SIRT1 activation , PPAR gamma , SOCS3 , Spermidine 
- Spices/β-Caryophyllene oxide (in black pepper, cinnamon, clove, lemon balm, oregano, cannabis, rosemary, hops)
- Fish oil 
- Milk Thistle/Silibinin 
- Bilberry 
- Black Cumin Seed Oil / Thymoquinone 
- Olive oil (extra virgin) 
- Zinc  (constitutive=always active)
- Lithium  (constitutive)
- EGCG  (constitutive)
- Bile 
- Curcumin  (constitutive)
- Resveratrol  (constitutive)
- Quercetin 
- Luteolin  (constitutive)
- Apigenin  (constitutive)
- Grape Seed Extract 
- Ursolic acid  (constitutive)
- Broccoli sprouts/Cruciferous veggies/Sulforaphane 
- Boswellia/Boswellic Acid 
- Cayenne/Capsaicin  – in peppers
- Gynostemma/H6 
- Emodin  (inducible)
- Berberine 
- Epimedium/Icariin 
- Bitter melon/Cucurbitacin E 
- Guggul/Guggulsterone  (constitutive)
- Feverfew/Parthenolide 
- Others: Caffeic acid, Betulinic acid (chaga), Morin (guava leaf), Plumbagin (black walnut hull), Diosmin , Garcinol  (constitutive), Celastrol, Gambogic acid, Butein, Auranofin (prescription)
- IFN , IFNy , NF-κB , IL-6 , TNF , MCP1 , IL-10 , IL-12 , IL-18, IL-22 , EGF , HGF , PDGF , GM-CSF , HDAC1-3 , HDAC2 , Acetylation-Lys685 , Phosphorylation-Tyr705 
- Leucine 
- Sleep loss 
STAT3 23andme Genes
Order your 23andme to see your genotypes.
The A allele is presumably higher STAT3, as it increases autoimmune disease risk, but makes you thinner. About half of the alleles in a population are A.
- AA=1.5X Ulcerative Colitis risk 
- A=1.2X increased risk of Crohn’s 
- G=2.22X increased risk of abdominal obesity, lower STAT3  – Saturated fat intake exacerbated these effects; among all participants with the highest saturated fat intake (> or =15.5% of energy), people with GG had a 3.30X increased risk for obesity. 
- GG=1.82X increased risk of Psoriatic arthritis, G=1.35X 
CC=more STAT3 production in people, (better for CML) .
C is the more common allele. About 33% of the alleles in a population are T.
C is higher STAT3.
A=lower STAT3, 2.5X more likely to have fatty liver disease .
A is the more common allele. About 39% of the alleles in a population are C.
Probably G has higher STAT3.
G=increased risk of abdominal obesity .
About 31% of the alleles in a population are G.
- Analyze your STAT3, PPARG, and other genes mentioned above with SelfDecode
- All About Inflammation Mini-Course also covers info about STAT3 and Th17 dominance
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