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Title

Vitellogenin expression in wild cyprinid Petroleuciscus esfahani as a biomarker of endocrine disruption along the Zayandeh Roud River, Iran

AuthorsGilannejad, Neda ; Dorafshan, Salar; Heyrati, Fatemeh Paykan; Soofiani, Nasrollah Mahboobi; Asadollah, Saeid; Martos-Sitcha, Juan Antonio ; Prat, Francisco ; Yúfera, Manuel ; Martínez-Rodríguez, Gonzalo
KeywordsBioindicator
EDCs
Quantitative PCR
River ecosystem
Issue DateFeb-2016
PublisherElsevier
CitationChemosphere 144: 1342-1350 (2016)
AbstractAquatic environments are the ultimate sink for most of anthropogenic pollutants. The Zayandeh Roud River is the most important river in the central Iranian Plateau, supplying water to a large population. In order to determine the potential occurrence and in vivo effects of Endocrine Disrupting Chemicals (EDCs) with estrogenic or anti-androgenic properties we analyzed the wild populations of an extensively distributed endemic fish species, Petroleuciscus esfahani. For this purpose, specimens were caught from two sites upstream and two sites downstream of the expected major anthropogenic pollution sources. P. esfahani full-length cDNAs for vitellogenin (vtg), with 4177 base pairs (bp) encoding a 1339 amino acids (aa), and for β-actin (actb), with 1776 bp encoding a 375 aa, were amplified and cloned. Hepatic vtg mRNA expression levels were measured by quantitative real-time PCR. Condition factor, gonadosomatic index and sex ratio were calculated and compared with vtg expression. Gonad histology was performed to study the possible presence of intersex condition. Detection of vtg transcripts in male individuals from the two downstream sampling sites supports the hypothesis of exposure to EDCs in these regions. Higher vtg expression in male individuals, together with reduced gonad size and condition factor, in specimens from the site located downstream of the major steel mill plant suggest a major endocrine disruption in this area.
Publisher version (URL)https://doi.org/10.1016/j.chemosphere.2015.09.106
URIhttp://hdl.handle.net/10261/169213
DOI10.1016/j.chemosphere.2015.09.106
ISSN0045-6535
Appears in Collections:(ICMAN) Artículos
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