Abstract
The entrance of cells into a permanent state of cell cycle arrest with the ability to resist apoptosis is termed “cellular senescence”. The accumulation of senescent cells within the body can lead to tissue aging and the dysfunction of organs. Whether due to external stressors or the passage of time, aging is an inevitable process that afflicts every living being. Current studies that investigate aging rely on the use of cells or rodent models. Although cells present a cost-effective and quick way to analyze aging, they lack the complexity of whole-body systems and therefore require the use of an in vivo model post-in vitro assays. The zebrafish, Danio rerio, presents a cost-effective model with quick development and large numbers of offspring. These fish share 70% similarity of their genes with humans, including genes known to be associated with human diseases, such as those diseases of aging and/or senescence, like Alzheimer’s disease. Major tissues and organs of humans are also found in these fish, and therefore, zebrafish can serve as a useful model when studying diseases, aging, Alzheimer’s disease, and other disorders. In this review, we will discuss some of the major senescence biomarkers and detection methods, as well as discuss how zebrafish models can be used for the study of aging and age-related disorders.
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