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PubMed This is a summary of 19 peer-reviewed journal articles Updated
Immunology · Autosomal Dominant Hyper-IgE Syndrome (STAT3 Deficiency)

Why STAT3 Matters: How One Gene Affects the Whole Body

At a Glance

STAT3 deficiency in Job Syndrome causes body-wide issues because the protein is essential for multiple systems. It leads to a muted immune system resulting in cold abscesses without fever, lung cysts called pneumatoceles, retained baby teeth, and an increased risk of blood vessel aneurysms.

Because the STAT3 protein is found in almost every cell in the body, its deficiency acts like a “blueprint error” that affects multiple systems simultaneously [1][2]. While the immune system is the most visible part of Job Syndrome, the lack of STAT3 signaling also changes how the body builds lungs, bones, and blood vessels [3][4].

1. The Immune System: “Cold” Abscesses

The most distinctive feature of STAT3 deficiency is a “muted” immune response. Usually, when your body detects bacteria, it triggers intense inflammation—causing redness, heat, and pain.

  • Th17 Deficiency: STAT3 is the “master switch” that tells the body to create Th17 cells [5][6]. Without these cells, the immune system fails to recruit enough white blood cells to the site of an infection [7][8].
  • “Cold” Abscesses: Because the body doesn’t send the usual “emergency response” of inflammation to the skin, large pockets of pus (abscesses) can form without turning red or feeling hot [9][7]. These are called cold abscesses and can be dangerous because they are easy to overlook [10].

Recognizing Emergencies Without Typical Symptoms

Because your body’s standard warning system (fever, redness, intense pain) is broken, you cannot rely on typical signs to know if an infection is serious. You must watch for alternative warning signs that require immediate medical attention:

  • Profound, unexplained fatigue or lethargy.
  • Sudden, painless swelling under the skin or around joints.
  • Changes in breathing rate or a new, persistent cough (even without a fever).
  • Behavioral changes, confusion, or refusing to eat/drink (in children).

2. The Lungs: Pneumatoceles

In Job Syndrome, the lungs face a “double hit.” Not only is the immune system weak at fighting pneumonia, but the lung tissue itself has trouble repairing correctly.

  • Pneumatoceles: When a person with Job Syndrome gets pneumonia, the lung tissue doesn’t heal with a typical scar. Instead, thin-walled, air-filled cysts called pneumatoceles can form [11][12].
  • Chronic Risks: These cysts can trap bacteria or fungi, leading to chronic infections [13][14].

3. Skeletal and Dental

STAT3 is critical for osteogenesis—the process of building and remodeling bone [15][16]. When this process is interrupted, several characteristic physical features can emerge:

  • Retained Baby Teeth: Most children lose their primary (baby) teeth naturally. In Job Syndrome, these teeth often refuse to fall out because the body doesn’t “reabsorb” the roots correctly. This can lead to two rows of teeth [17][18].
  • Skeletal Changes: Patients may have scoliosis (curvature of the spine), extra-flexible joints, and lower bone density [3][15].

4. Vascular Risk

Recent research has highlighted that STAT3 plays a role in the health of the connective tissue that makes up our blood vessels [4].

  • Aneurysms and Ectasia: Some patients may develop ectasia (widening) or aneurysms (bulges) in the arteries, particularly the coronary arteries (heart) or intracranial arteries (brain) [19][4]. This makes cardiovascular screening vital [4].

For information on how this is verified, see The Road to Certainty: Testing and Diagnosis.

Common questions in this guide

Why do people with Job Syndrome get cold abscesses?
STAT3 deficiency prevents the body from creating a normal inflammatory response to infections. As a result, pockets of pus can form under the skin without the typical redness, heat, or pain.
How does STAT3 deficiency affect the lungs?
In people with Job Syndrome, lung tissue struggles to heal properly after pneumonia. This can lead to the formation of thin-walled, air-filled cysts called pneumatoceles that can trap bacteria and cause chronic infections.
Why do children with Job Syndrome often have two rows of teeth?
The STAT3 mutation interferes with normal bone remodeling. Because the body does not properly reabsorb the roots of primary (baby) teeth, they often fail to fall out on their own when adult teeth come in.
What emergency signs should I watch for since I don't get fevers?
Since your body's standard warning system is impaired, watch for profound fatigue, sudden painless swelling, changes in breathing, or behavioral changes like confusion. Seek immediate medical attention if these occur.
Does Job Syndrome affect the heart or blood vessels?
Yes, STAT3 is important for the connective tissue in blood vessels. Some patients may develop aneurysms or widening in their arteries, making regular cardiovascular screening very important.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Why does my/my child's skin form 'cold' abscesses instead of the usual red, painful ones?
  2. 2.Does the STAT3 deficiency affect the way the blood vessels or heart are built, and should we screen for aneurysms?
  3. 3.Are the lung cysts (pneumatoceles) a permanent change, and how do they change our treatment of future pneumonias?
  4. 4.What emergency signs should I look for when standard signs like fever and redness are missing?

Questions For You

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References

References (19)
  1. 1

    Multisystem autoimmune disease caused by increased STAT3 phosphorylation and dysregulated gene expression.

    Todaro F, Tamassia N, Pinelli M, et al.

    Haematologica 2019; (104(7)):e322-e325 doi:10.3324/haematol.2018.202374.

    PMID: 31073074
  2. 2

    The signal transducer and activator of transcription 3 at the center of the causative gene network of the hyper-IgE syndrome.

    Minegishi Y

    Current opinion in immunology 2023; (80()):102264 doi:10.1016/j.coi.2022.102264.

    PMID: 36435159
  3. 3

    [Hyper-IgE syndrome. Lessons from function and defects of STAT-3 or DOCK-8].

    Alcántara-Montiel JC, Vega-Torres BI

    Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993) 2016; (63(4)):385-396 doi:10.29262/ram.v63i4.217.

    PMID: 27795219
  4. 4

    Hematopoietic Stem Cell Transplantation and Vasculopathy Associated With STAT3-Dominant-Negative Hyper-IgE Syndrome.

    Ponsford MJ, Clark J, Mock J, et al.

    Frontiers in pediatrics 2020; (8()):575 doi:10.3389/fped.2020.00575.

    PMID: 33014947
  5. 5

    Who regulates whom: ZNF341 is an additional player in the STAT3/TH17 song.

    August A

    Science immunology 2018; (3(24)) doi:10.1126/sciimmunol.aat9779.

    PMID: 29907692
  6. 6

    JMJD3 Promotes Porphyromonas gingivalis Lipopolysaccharide-Induced Th17-Cell Differentiation by Modulating the STAT3-RORc Signaling Pathway.

    Huang D, Zhang C, Wang P, et al.

    DNA and cell biology 2022; (41(8)):778-787 doi:10.1089/dna.2022.0149.

    PMID: 35867069
  7. 7

    TNF overproduction impairs epithelial staphylococcal response in hyper IgE syndrome.

    Myles IA, Anderson ED, Earland NJ, et al.

    The Journal of clinical investigation 2018; (128(8)):3595-3604.

    PMID: 30035749
  8. 8

    Selective loss of function variants in IL6ST cause Hyper-IgE syndrome with distinct impairments of T-cell phenotype and function.

    Shahin T, Aschenbrenner D, Cagdas D, et al.

    Haematologica 2019; (104(3)):609-621 doi:10.3324/haematol.2018.194233.

    PMID: 30309848
  9. 9

    AD Hyper-IgE Syndrome Due to a Novel Loss-of-Function Mutation in STAT3: a Diagnostic Pursuit Won by Clinical Acuity.

    Moens L, Schaballie H, Bosch B, et al.

    Journal of clinical immunology 2017; (37(1)):12-17 doi:10.1007/s10875-016-0351-9.

    PMID: 27844301
  10. 10

    A Novel STAT3 Gene Mutation Related Hyper-IgE Syndrome Misdiagnosed as Hidradenitis Suppurativa.

    Shrestha P, Sabharwal G, Ghaffari G

    Case reports in immunology 2018; (2018()):4860902 doi:10.1155/2018/4860902.

    PMID: 30186644
  11. 11

    Liver abscess in a boy with hyper IgE syndrome.

    Nandy S, Shah I

    Journal of family medicine and primary care 2016; (5(2)):491-492 doi:10.4103/2249-4863.192353.

    PMID: 27843873
  12. 12

    PID in Disguise: Molecular Diagnosis of IRAK-4 Deficiency in an Adult Previously Misdiagnosed With Autosomal Dominant Hyper IgE Syndrome.

    Frans G, Moens L, Schrijvers R, et al.

    Journal of clinical immunology 2015; (35(8)):739-44 doi:10.1007/s10875-015-0205-x.

    PMID: 26472314
  13. 13

    STAT3-Dependent Regulation of CFTR and Ciliogenesis Is Essential for Mucociliary Clearance and Innate Airway Defense in Hyper-IgE Syndrome.

    Sun L, Walls SA, Dang H, et al.

    American journal of respiratory and critical care medicine 2025; (211(10)):1951-1969 doi:10.1164/rccm.202407-1415OC.

    PMID: 40315437
  14. 14

    STAT3 mutation-associated airway epithelial defects in Job syndrome.

    Zhang Y, Lin T, Leung HM, et al.

    The Journal of allergy and clinical immunology 2023; (152(2)):538-550 doi:10.1016/j.jaci.2022.12.821.

    PMID: 36638921
  15. 15

    STAT3 is critical for skeletal development and bone homeostasis by regulating osteogenesis.

    Zhou S, Dai Q, Huang X, et al.

    Nature communications 2021; (12(1)):6891 doi:10.1038/s41467-021-27273-w.

    PMID: 34824272
  16. 16

    Osteoblastic STAT3 Is Crucial for Orthodontic Force Driving Alveolar Bone Remodeling and Tooth Movement.

    Gong X, Sun S, Yang Y, et al.

    Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2023; (38(1)):214-227 doi:10.1002/jbmr.4744.

    PMID: 36370067
  17. 17

    Intraoral and maxillofacial abnormalities in patients with autosomal dominant hyper-IgE syndrome.

    Tar I, Szegedi M, Krasuska-Sławińska E, et al.

    Central-European journal of immunology 2023; (48(3)):228-236 doi:10.5114/ceji.2023.130874.

    PMID: 37901871
  18. 18

    Retained primary teeth in STAT3 hyper-IgE syndrome: early intervention in childhood is essential.

    Meixner I, Hagl B, Kröner CI, et al.

    Orphanet journal of rare diseases 2020; (15(1)):244 doi:10.1186/s13023-020-01516-3.

    PMID: 32912316
  19. 19

    Case Report: Biliary hemorrhage by intrahepatic pseudoaneurysm and asymptomatic right coronary artery pseudoaneurysm in a patient with STAT3 hyper IgE syndrome.

    Fujita D, Ueki M, Yamanaka H, et al.

    Frontiers in immunology 2025; (16()):1601776 doi:10.3389/fimmu.2025.1601776.

    PMID: 40491905

This page explains the systemic effects of STAT3 deficiency for educational purposes. Always consult your immunologist or healthcare team for personalized medical advice and symptom monitoring.

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