Identification and characterization of novel genes modulated in the thyroid of dogs treated with methimazole and propylthiouracil.
Induction of cell proliferation by mitogen or growth factor stimulation leads to the specific stimulation or repression of a large number of genes. To better understand differentiated epithelial cell growth regulation, we have initiated a study to identify genes which are regulated by the thyrotropin-dependent mitogenic pathway in dog thyroid cells. A thyroid cDNA library was prepared from a methimazole and propylthiouracil-treated dog and differentially screened with probes derived from control or stimulated thyroids. Among 19 clones isolated, 6 encode known proteins (inwardly rectifying potassium channel, nucleosome assembly protein, ribosomal protein L7, elongation factor 1alpha, non-muscle myosin light chain, and heat shock protein 90beta). The 13 others correspond to proteins whose function is unknown. Among them, 5 correspond to mRNAs whose expression was modulated by mitogenic stimulation of thyrocytes in primary culture. A preliminary characterization of two of these cDNAs is reported: clone 5, which might represent a novel, atypical protein kinase, and clone 3, which contains ankyrin-like repeats, suggesting that it might interact with other proteins.
Institut de Recherche Interdisciplinaire, Université Libre de Bruxelles, Campus Erasme, 808 route de Lennik, 1070 Brussels, Belgium.
F
F
Wilkin
V
V
Savonet
A
A
Radulescu
J
J
Petermans
J E
JE
Dumont
C
C
Maenhaut
D000818:Animals; D013956:Antithyroid Agents / Q000494:pharmacology*; D001483:Base Sequence; D015152:Blotting, Northern; D003001:Cloning, Molecular; D004285:Dogs; D004591:Electrophoresis, Polyacrylamide Gel; D005786:Gene Expression Regulation / Q000187:drug effects*; D018841:HSP90 Heat-Shock Proteins / Q000235:genetics; D008713:Methimazole / Q000494:pharmacology*; D008969:Molecular Sequence Data; D011441:Propylthiouracil / Q000494:pharmacology*; D012333:RNA, Messenger / Q000378:metabolism; D013961:Thyroid Gland / Q000187:drug effects*; D013972:Thyrotropin / Q000235:genetics
D013956:Antithyroid Agents; D018841:HSP90 Heat-Shock Proteins; D012333:RNA, Messenger; D008713:Methimazole; D011441:Propylthiouracil; D013972:Thyrotropin