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Structural remodelling of bat thyroid parafollicular (C) cells during development
The American Journal of Anatomy
|February 1, 1980
Summary
Bat parafollicular (C) cell development shows fetal calcitonin granule accumulation. Postnatal changes include granule depletion and autophagy in juvenile bats, suggesting a role in developing mammals.
Area of Science:
- Developmental biology
- Cell biology
- Endocrinology
Background:
- Parafollicular (C) cells are crucial endocrine cells within the thyroid gland.
- Their developmental trajectory and functional changes are not fully understood in all mammalian species.
Purpose of the Study:
- To investigate the morphological development of bat parafollicular (C) cells from early formation through adulthood.
- To characterize the changes in calcitonin granule content and cellular structures during different life stages.
Main Methods:
- Utilized electron microscopy to examine parafollicular cell morphology.
- Analyzed cell populations and granule content at various developmental stages in bats.
Main Results:
- Parafollicular cells increased from 3% to 28% of parenchymal volume during fetal development, packed with calcitonin granules.
- Postnatally, cells showed granule depletion, and a distinct cell type with dense-cored granules emerged.
- Juvenile bats exhibited massive secretory material accumulation in the endoplasmic reticulum and significant autophagy, which were absent in adults.
Conclusions:
- Morphological evidence supports a dynamic role for parafollicular (C) cells during mammalian development.
- Observed changes suggest distinct functional phases related to calcitonin production and cellular turnover.