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Sex of fish determined by access to food

However, some examples also attest to a higher susceptibility of male livers according to certain specific exposure conditions to toxic chemicals 30 , and a careful investigation of the dimorphic detoxification capabilities should aim at being performed for each specific chemical or hepatic stressor evaluation. Top dysregulated molecular pathways represented on bar chart A and heatmap B. Among the proteins identified in the three male pools, 64 appear to be potentially male-biased, because they were detected in both 3 male pools, and not in any of the three female pools. Supplementary Material Supplementary Information. According to their putative annotation provided by the Batman algorithm, a pathway enrichment analysis indicates that female-enriched metabolomes would rather be implicated in some saccharide and amino acid metabolic processes, whereas male-enriched metabolomes seem to exhibit signatures of steroid hormone biosynthesis and energy TCA, nitrogen processes, when the common metabolite set is more relevant to other amino acid and saccharide metabolism Fig. For females, seem to be similarly biased of the total proteins identified in the three female pools Fig. Toxicogenomic analysis suggests chemical-induced sexual dimorphism in the expression of metabolic genes in zebrafish liver. Molecular functions that are specifically activated in males and females Supplementary Table S6 are indicated in blue and red, respectively. Down-regulated proteins are indicated in yellow, up-regulated proteins in blue, and missing values in grey. Metabolomics of male and female medaka livers by 1 H NMR. Various isoforms of the FAM20C protein family were similarly over-expressed in the female liver of the Gulf pipefish This article has been cited by other articles in PMC. Small fish such as the Japanese medaka Oryzias latipes have emerged as useful vertebrate model organisms, suitable for studying various physiological processes 9 , toxicological mechanisms 10 and also ecotoxicological effects Each spectrum consisted of scans of 32, data points with a spectra width of 7. Previous works performed on zebrafish and Gulf pipefish have highlighted large sets of genes whose expression appears to be driven by sex-dependent processes 16 ,

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Description: Zebrafish adult females and males can be distinguished by body shape females have a larger abdomen , pigmentation males have darker yellow pigmentation and behaviour. However by 5 months their overall body shape and pigmentation was now similar to that of a adult male zebrafish. Indeed, some genes such as vitellogenin 1 , 3 or 6 reach above 15 to 19 log 2 FC variations namely up to , FC Supplementary Table S4 , representing a large portion of the total female liver transcriptome. Messenger RNA expression levels were secondarily confirmed by RT-qPCR on 8 genes randomly selected within the expression intensity gradient that presented correlation coefficient greater than 0. Discussions The liver is a key organ in vertebrates performing a large diversity of vital functions, including processing and storage of nutrients, maintenance of serum composition, bile production, and xenobiotic detoxification. The liver of organisms under undisturbed lab condition presents in both sexes a characteristic architectural organization with polyhedral hepatocytes organized around the capillary sinusoids and the bile canaliculi, appearing in characteristic cord-like parenchymal structures. For females, seem to be similarly biased of the total proteins identified in the three female pools Fig. Published online Aug The effects of synthetic estrogen exposure on the sexually dimorphic liver transcriptome of the sex-role-reversed Gulf pipefish. Vergleich der steroidumwandlung in leber end nebenniere. Similar to the mammalian liver, the teleost liver plays an important role in the metabolic homeostasis of the whole organism, in addition to that, oviparous vertebrate-specific processes related to the synthesis of various oocyte protein precursors i. The observations of globally more intensive and numerous molecular up-regulations in female livers are in agreement with the conception of an oviparous female liver that is in charge of extra metabolic activity, according to their massive production of oocyte yolk stocks and chorion precursors, which have substantial impacts on both amino acid, saccharide and fatty acid metabolism of the global liver activities 8.
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