FRTL-5

Study of thyroid cells, hormone dependency and secretion.

Rat thyroid

This thyroid cell line has been established from normal thyroid glands from 5 to 6-week-old Fischer rats. FRTL-5 is a clonal line of the continuously cultured FRTL cells derived by successive clonal isolation. The cells are characterised by maintaining highly differentiated thyroid features such as secretion of thyroglobulin and concentration of iodide. FRTL-5 cells have been used as assays measuring the stimulatory activity of human autoimmune immunoglobulins from patients with Graves disease. Tend to grow in three-dimensional structures, monolayer not formed.

Coon′s modified Ham′s F12 medium (or Kaign′s modified Ham′s F12 + 45mg/L ascorbic acid + 18mg/L Inositol) + 2mM Glutamine + 10μg/ml Insulin + 10nM Hydrocortisone + 5μg/ml Transferrin + 10ng/ml gly-his-lys acetate + 10ng/ml somatostatin + 5% Foetal Bovine Serum (FBS) + 10mU/ml TSH. As an alternative to Coon′s modified Ham′s F12, it is possible to use Kaign′s modified Ham′s F12 supplemented with 45mg/L Ascorbic acid and 18mg/L Inositol.

Split sub-confluent cultures (70-80%) 1:2 to 1:3 i.e. seeding at 3-4x10,000 cells/cm² using 0.25% trypsin or trypsin/EDTA; 5% CO₂; 37°C.

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This cell line is part of the European Collection of Authenticated Cell Cultures (ECACC), an international repository managed by the United Kingdom Health Security Agency (UKHSA). No licensing agreement is required when either this cell line or the DNA extracted from it are used for internal research purposes only. Any other use of these products is prohibited without the express written permission of UKHSA. Inquiries regarding authorized use of this cell line or its genomic DNA may be directed to culturecollections@ukhsa.gov.uk.