gluten ataxia
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The brain form of gluten sensitivity — autoimmune damage to the cerebellum that causes progressive loss of balance and coordination.
Gluten ataxia is a neurological condition in which antibodies triggered by gluten exposure damage the cerebellum — the brain region responsible for coordinating movement and balance. It is part of the spectrum of "gluten-related neurological disorders" and is considered an autoimmune condition, distinct from the nutritional nerve damage seen in peripheral-neuropathy-celiac.
Mechanism
Transglutaminase 6 (TG6) — a form of tTG expressed specifically in neural tissue — is the primary autoimmune target in gluten ataxia. Anti-TG6 antibodies produced in response to gluten exposure deposit in the cerebellum, causing Purkinje cell loss (Purkinje cells are the dominant neurons in the cerebellum responsible for motor coordination).
Unlike nutritional neuropathy, this mechanism can occur even with normal nutrient levels — it is driven by the immune response, not malabsorption.
Symptoms
- Progressive gait ataxia (unsteady, wide-based walking)
- Limb ataxia (dyscoordination of arm/hand movements)
- Eye movement abnormalities (nystagmus)
- Tremor
- Dysarthria (slurred speech)
Symptoms develop gradually and are often attributed to aging or other neurological conditions before celiac is considered.
Who Is Affected
Gluten ataxia can occur:
- With intestinal celiac disease
- Without intestinal involvement — patients may have normal gut biopsies
- In NCGS patients (without positive TTG IgA or villous atrophy)
- In patients with or without HLA-DQ2/DQ8
The absence of GI symptoms is what makes gluten ataxia frequently missed.
Diagnosis
- Cerebellar atrophy on MRI
- Anti-TG6 antibodies in blood (specialist test)
- TTG IgA may or may not be positive
- Ruling out other causes of cerebellar ataxia
Treatment
gluten-free-diet — the primary treatment. Neurological improvement occurs if GFD is started early, before irreversible Purkinje cell loss has occurred. Recovery is partial in established ataxia; symptoms stabilise but rarely fully resolve.
Intravenous immunoglobulin (IVIg) is sometimes used in severe cases.
Related Concepts
autoantibodies-celiac | tissue-transglutaminase | peripheral-neuropathy-celiac | ncgs | gluten-free-diet | hla-dq2-dq8