Aquaporin-1 and Aquaporin-3 Density Decreases in Meniscal Tissue During Aging: An Experimental animal Study
Aquaporin-1 and aquaporin-3 density decreases at aging
DOI:
https://doi.org/10.5281/zenodo.12805644Keywords:
Menisci, aging, aquaporin 1, aquaporin 3, type I collagen, immunohistochemistryAbstract
Background: The menisci play crucial role in absorbing shock and providing stability thanks to their particular anatomy and physiology. Menisci exhibit histological, biochemical, and morphological degenerative changes during the process of aging. Aquaporins (AQPs) are membrane water channels that regulate the water contents of cells. We compared expression of aquaporin1 (AQP1), aquaporin3 (AQP3), and type I collagen in the meniscal tissues of young and aged rats using immunohistochemistry.
Methods: In this study, 14 Wistar albino rats (180-400 g) were used. Animals were divided into two equal groups; Group I: two-month old animals (n=7), Group II: 18-month-old animals (n=7). Meniscal tissues were dissected and examined histopathologically and immunhistochemically. After routine histological procedure, sections of 4-5 μm thickness were obtained and embedded in paraffin. Sections were stained immunhistochemically for AQP1, AQP3, and type I collagen with hematoxylin-eosin.
Results: Immunohistochemically, expression of AQP1, AQP3, and type I collagen were demonstrated in young and old rats. In aged rats, number of fibrochondrocytes was too few and cracks were too many compared to young rats. It was found that the immunoreactivity of AQP1, AQP3, and type I collagen in meniscal tissues were significantly reduced by aging.
Conclusions: Our results suggest that expression of AQP1, AQP3 and type I collagen in menisci tissue may be related to age.
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