Mercury is a prominent environmental contaminant that causes endocrine disorder to human and other organisms. But little is known about the response of the thyroid functions and hypothalamic-pituitary-thyroid (HPT) axis to mercury in teleosts and the few studies that are available have not yielded consistent results. In this study, expression profiles of corticotropin-releasing hormone (crh), thyroid stimulating hormone beta (tshβ), solute carrier family 5 (sodium iodide symporter) member 5 (slc5a5), thyroglobulin (tg), thyroid hormone receptor alpha (trα) and thyroid hormone receptor beta (trβ) genes were determined in whole-body of Chinese rare minnow (Gobiocypris rarus) larvae after exposure to different levels of Hg(2+) (0, 0.1 and 0.3 mg/l) for 4 days, as well as the thyroid hormones (THs) levels. Moreover, the 96-h lethal concentration of Hg(2+) on rare minnow larvae was determined as 0.32 mg/l. The results showed that crh, tg, trα and trβ mRNA levels were significantly up-regulated in the larvae, but the gene expression of tshβ and slc5a5 was not significantly changed in our study. Besides, the THs levels increased in the whole-body of fish, especially the thyroxine (T4) level. The above results indicated that Hg(2+) could alter some genes expression in the HPT axis which could be used as the potential biomarkers for evaluating the environmental Hg(2+)-induced stress in fish.

• Klíčová slova
• Chinese rare minnow, Gene expression, Hypothalamic–pituitary–thyroid axis, Mercury, Thyroid hormone,
• MeSH
• beta podjednotka tyreotropinu genetika   MeSH
• chemické látky znečišťující vodu toxicita   MeSH
• chlorid rtuťnatý toxicita   MeSH
• Cyprinidae genetika   metabolismus   MeSH
• hormon uvolňující kortikotropin genetika   MeSH
• larva účinky léků   genetika   metabolismus   MeSH
• LD50 MeSH
• regulace genové exprese účinky léků   MeSH
• symportéry genetika   MeSH
• thyreoglobulin genetika   MeSH
• thyroxin metabolismus   MeSH
• trijodthyronin metabolismus   MeSH
• tyreoidální hormony, receptory alfa genetika   MeSH
• tyreoidální hormony, receptory beta genetika   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• beta podjednotka tyreotropinu MeSH
• chemické látky znečišťující vodu MeSH
• chlorid rtuťnatý MeSH
• hormon uvolňující kortikotropin MeSH
• sodium-iodide symporter MeSH Prohlížeč
• symportéry MeSH
• thyreoglobulin MeSH
• thyroxin MeSH
• trijodthyronin MeSH
• tyreoidální hormony, receptory alfa MeSH
• tyreoidální hormony, receptory beta MeSH