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Sorting Nexin 2 (SNX2): a potential marker of active thyrocytes in normal and hyperfunctioning thyroid disorders
Maki Kanzawa1, Shigeo Hara, Shuho Semba
1*Department of Pathology, Division of Diagnostic Pathology †Department of Pathology, Division of Pathology, Kobe University Graduate School of Medicine ‡Department of Pathology, Kuma Hospital, Kobe, Japan.
Applied Immunohistochemistry & Molecular Morphology : AIMM
|March 28, 2013
Summary
Sorting nexin 2 (SNX2) is a novel marker for active thyroid follicular cells, particularly in hyperstimulated conditions like Graves disease. Its presence correlates with columnar cell morphology and reflects cellular trafficking activity.
Area of Science:
- Cell Biology
- Endocrinology
- Molecular Biology
Background:
- Sorting nexins (SNXs) are proteins involved in cellular processes like endocytosis and protein trafficking.
- Thyroid follicular cells' activity state influences their morphology and function.
Purpose of the Study:
- To investigate the expression and localization of SNX2 in thyroid follicular cells.
- To determine if SNX2 can serve as a marker for active thyrocytes.
Main Methods:
- Immunohistochemical staining of thyroid tissue.
- Morphometric analysis to correlate SNX2 positivity with cell morphology.
- Examination of SNX2 expression in various thyroid disorders.
Main Results:
- SNX2 is expressed in active, columnar thyroid follicular cells but not in inactive, flattened cells.
- SNX2 positivity significantly correlates with columnar cell morphology.
- SNX2 expression is prominent in hyperstimulated thyroid disorders, including Graves disease and functioning nodules.
- SNX2 immunolocalization is specific among examined SNXs family members in hyperstimulated cells.
Conclusions:
- SNX2 is a novel and specific marker for active thyroid follicular cells.
- SNX2 expression reflects endosomal trafficking activity in thyrocytes.
- SNX2 may be a useful diagnostic marker in hyperstimulated thyroid conditions.
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