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Thyroperoxidase Antibodies (TPO Ab)

Understanding Thyroid Peroxidase (TPO) and Autoimmune Thyroid Disorders

Thyroid peroxidase (TPO) is an essential enzyme located on the microsomes of thyroid cells (thyrocytes). It plays a key role in the production of thyroid hormones. However, in autoimmune thyroid conditions, TPO can act as an autoantigen, triggering the immune system to produce antibodies against it.

Anti-TPO Antibodies and Their Clinical Relevance

The presence of antibodies to TPO in the bloodstream is a strong indicator of autoimmune thyroid disease. Elevated anti-TPO antibody levels are commonly associated with thyroiditis, especially forms driven by immune system dysfunction.

Hashimoto’s Thyroiditis and Anti-TPO Levels

Up to 90% of individuals with chronic Hashimoto’s thyroiditis exhibit high serum levels of anti-TPO antibodies. This condition can lead to an underactive thyroid (hypothyroidism), resulting in symptoms such as fatigue, weight gain, and cold intolerance. Testing for anti-TPO levels plays a crucial role in confirming the diagnosis and guiding treatment.

Graves’ Disease and Thyroid Antibodies

In Graves’ disease, which causes hyperthyroidism, approximately 70% of patients show elevated anti-TPO titres. Monitoring these antibodies helps in assessing the autoimmune activity and managing disease progression.

Private Thyroid Antibody Testing in Slough

For individuals in Slough and surrounding areas such as Langley, Windsor, Maidenhead, and Burnham, private blood testing for anti-TPO antibodies is available. This diagnostic service helps identify autoimmune thyroid conditions early and supports effective management through timely intervention and specialist care.

There is an additional £20 phlebotomy fee for every donation.