Evidence of the Presence of Thyroid Hormones in Achatina fulica Snails
An. acad. bras. ciênc
; 89(3,supl): 2181-2188, 2017. graf
Article
in English
| LILACS
| ID: biblio-886776
Responsible library:
BR1.1
ABSTRACT
ABSTRACT The objective of this study was to identify thyroid hormones and to examine their putative site of synthesis in Achatina fulica snails. For this purpose, radioimmunoassays were performed for T3 and T4 before and after long starvation with or without hemolymph deproteinization. Sodium/iodide symporter activity in vivo was analyzed through 125I administration with and without KClO4 pretreatment. Only T4 was detected, and its concentration decreased due to starvation or deproteinization. However, high-performance liquid chromatography analysis also showed the presence of T2 and T3 apart from T4, but rT3 was not detected in the A. fulica hemolymph. The sodium/iodide symporter activity was greater in cerebral ganglia than digestive gland, but KClO4 treatment did not inhibit iodide uptake in any of the tissues analyzed. Altogether, our data confirm for the first time the presence of thyroid hormones in A. fulica snails and suggest their participation in the metabolism control in this species, although the putative site of hormone biosynthesis remains to be elucidated.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Snails
/
Thyroxine
Limits:
Animals
Language:
English
Journal:
An. acad. bras. ciênc
Journal subject:
Science
Year:
2017
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal Rural do Rio de Janeiro/BR