概要：FRTL-5 cells, derived from the thyroid glands of Fischer rats aged 5 to 6 weeks, offer a remarkable resource for researchers in biological science.
This clonal line of continuously cultured FRTL cells has gained recognition for maintaining highly differentiated thyroid features, including thyroglobulin secretion and iodide concentration.
Unlike other cell lines, FRTL-5 cells tend to grow in intricate three-dimensional structures rather than forming a monolayer, providing a unique model for studying thyroid cell behaviour.
FRTL-5 cells have been employed as assays to measure the stimulatory activity of human autoimmune immunoglobulins found in patients with Graves disease, a common thyroid disorder.
Their consistent performance, high reproducibility, and diagnostic accuracy have made them a preferred choice for such studies for over 30 years.
The breakthroughs achieved using FRTL-5 cells are worth highlighting.
Three decades ago, the esteemed Kohn group pioneered a bioassay based on these cells, exhibiting exceptional reproducibility, feasibility, and diagnostic precision.
Through this innovative approach, Kohn and colleagues achieved a significant milestone by developing monoclonal antibodies (moAbs) explicitly targeting the thyroid-stimulating hormone receptor (TSHR).
This groundbreaking accomplishment shed light on the multifaceted functional nature of thyroid receptor antibodies (TRAbs) in individuals with Graves disease.
Notably, their research unveiled not only stimulating and blocking TRAbs but also antibodies that activated alternative pathways beyond the traditional cyclic adenosine monophosphate (cAMP) pathway.
The applications of FRTL-5 cells extend far beyond their pivotal role in deciphering the complexities of Graves disease.
Researchers have relied on these cells to explore the inner workings of thyroid cells, studying hormone dependency and secretion mechanisms.
Their unique ability to maintain the characteristics of differentiated thyroid cells provides an invaluable platform for investigating the intricate processes that govern thyroid function.
