کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4414290 1307707 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The endocrine disruptor bisphenol A increases the expression of HSP70 and ecdysone receptor genes in the aquatic larvae of Chironomus riparius
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
The endocrine disruptor bisphenol A increases the expression of HSP70 and ecdysone receptor genes in the aquatic larvae of Chironomus riparius
چکیده انگلیسی

Bisphenol A (BPA) is an endocrine disruptor that can mimic the action of estrogens by interacting with hormone receptors and is, therefore, potentially able to influence reproductive functions in vertebrates. Although information about the interaction with the endocrine systems in invertebrates is limited, it has also been shown its effect on reproductive and developmental parameters in these organisms. As little is known about its mechanism of action in aquatic invertebrates, we have examined the effects of BPA on the expression of some selected genes, including housekeeping, stress-induced and hormone-related genes in Chironomus riparius larvae, a widely used organism in aquatic ecotoxicology. The levels of different gene transcripts were measured by Northern blot or by semi-quantitative reverse transcription polymerase chain reaction (RT-PCR). Exposure to BPA (3 mg l−1, 12–24 h) did not affect the levels of rRNA or those of mRNAs for both L11 or L13 ribosomal proteins, selected as examples of housekeeping genes involved in ribosome biogenesis. Nevertheless, BPA treatment induced the expression of the HSP70 gene. Interestingly, it was found that BPA significantly increases the mRNA level of the ecdysone receptor (EcR). These results show for the first time that exposure to endocrine disrupting chemicals, such as BPA, can selectively affect the expression of the ecdysone receptor gene suggesting a direct interaction with the insect endocrine system. Furthermore, this finding suggests a common way of BPA action, shared by vertebrates and invertebrates, through interaction with steroid hormone receptors. Our study adds a new element, the EcR, which may be a useful tool for the screening of environmental xenoestrogens in insects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 71, Issue 10, May 2008, Pages 1870–1876
نویسندگان
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