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Simple Detection of Primary Cilia by Immunofluorescence
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The role of the primary cilium in thyroid function and dysfunction with implications for thyroid disease

Inés Martín-Lacave1, Victoria Vázquez-Román1, Beatriz Pérez-Fernández1

  • 1Departamento de Citología e Histología Normal y Patológica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán S/N, 41009, Seville, Spain.

Histochemistry and Cell Biology
|November 6, 2025
PubMed

Insights

Primary cilia (PC) are vital for thyroid hormone biosynthesis. Their loss in thyroid cancer suggests restoring PCs could be a novel tumor suppressor strategy.

Area of Science:

  • Endocrinology
  • Cell Biology
  • Cancer Research

Background:

  • Thyroid hormone (TH) biosynthesis occurs in thyroid follicles, requiring a specific cellular environment.
  • Primary cilia (PC), present in thyroid follicular epithelium, have an unexplored role in TH regulation.
  • PC's apical position suggests involvement in sensing and regulating the thyroid's lumenal environment.

Purpose of the Study:

  • To review the current understanding of primary cilia's role in normal thyroid function.
  • To explore modifications in PC characteristics during physiological and pathological thyroid conditions.
  • To highlight the potential of PC restoration as a therapeutic strategy for thyroid cancer.

Main Methods:

  • Literature review of studies on primary cilia in the thyroid gland.
  • Analysis of the relationship between thyroid function/disease and PC morphology/presence.
  • Examination of research on ciliogenesis defects and thyroid pathology.
  • Evaluation of studies investigating PC restoration in thyroid tumorigenesis.

Main Results:

  • Primary cilia are strategically located to regulate thyroid hormone biosynthesis.
  • Thyroid function and disease states are associated with alterations in PC characteristics.
  • A notable loss of PCs is observed in specific types of thyroid cancer.
  • Defects in ciliogenesis correlate with various thyroid pathologies.

Conclusions:

  • Primary cilia play a crucial, yet underappreciated, role in regulating thyroid activity.
  • Changes in PC are indicative of thyroid dysfunction and disease.
  • The loss of PCs in thyroid cancer presents a potential therapeutic target.
  • Restoring primary cilia function may offer a promising tumor suppressor strategy in thyroid tumorigenesis.

Keywords:
Primary ciliumThyrocytesThyroid cancerThyroid folliclesThyroid hormone biosynthesis

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