Protein content in larval diet affects adult longevity and antioxidant gene expression in honey bee workers

2014 ◽  
Vol 151 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Chengcheng Li ◽  
Baohua Xu ◽  
Yuxi Wang ◽  
Zaibin Yang ◽  
Weiren Yang
Keyword(s):  
Gene Expression ◽  
Protein Content ◽  
Honey Bee ◽  
Adult Longevity ◽  
Larval Diet ◽  
Antioxidant Gene ◽  
Antioxidant Gene Expression ◽  
Honey Bee Workers

scholarly journals DNA methylation is not a driver of gene expression reprogramming in young honey bee workers

2021 ◽  
Author(s):  
Carlos A. M. Cardoso-Junior ◽  
Boris Yagound ◽  
Isobel Ronai ◽  
Emily J. Remnant ◽  
Klaus Hartfelder ◽  
...  
Keyword(s):  
Gene Expression ◽  
Dna Methylation ◽  
Honey Bee ◽  
Differential Gene Expression ◽  
Social Contexts ◽  
Gene Body ◽  
Gene Body Methylation ◽  
Differential Gene ◽  
Honey Bee Workers ◽  
Methylation Patterns

AbstractIntragenic DNA methylation, also called gene body methylation, is an evolutionarily-conserved epigenetic mechanism in animals and plants. In social insects, gene body methylation is thought to contribute to behavioral plasticity, for example between foragers and nurse workers, by modulating gene expression. However, recent studies have suggested that the majority of DNA methylation is sequence-specific, and therefore cannot act as a flexible mediator between environmental cues and gene expression. To address this paradox, we examined whole-genome methylation patterns in the brains and ovaries of young honey bee workers that had been subjected to divergent social contexts: the presence or absence of the queen. Although these social contexts are known to bring about extreme changes in behavioral and reproductive traits through differential gene expression, we found no significant differences between the methylomes of workers from queenright and queenless colonies. In contrast, thousands of regions were differentially methylated between colonies, and these differences were not associated with differential gene expression in a subset of genes examined. Methylation patterns were highly similar between brain and ovary tissues and only differed in nine regions. These results strongly indicate that DNA methylation is not a driver of differential gene expression between tissues or behavioral morphs. Finally, despite the lack of difference in methylation patterns, queen presence affected the expression of all four DNA methyltransferase genes, suggesting that these enzymes have roles beyond DNA methylation. Therefore, the functional role of DNA methylation in social insect genomes remains an open question.

scholarly journals Multiwall Carbon Nanotube-Induced Apoptosis and Antioxidant Gene Expression in the Gills, Liver, and Intestine ofOryzias latipes

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Jin Wuk Lee ◽  
Young Chul Choi ◽  
Rosa Kim ◽  
Sung Kyu Lee
Keyword(s):  
Gene Expression ◽  
Multiwall Carbon Nanotubes ◽  
Gene Induction ◽  
Multiwall Carbon Nanotube ◽  
Antioxidant Gene ◽  
Significant Gene ◽  
Antioxidant Gene Expression ◽  
And Gender ◽  
Induced Apoptosis ◽  
Multiwall Carbon

Multiwall carbon nanotubes (MWCNTs) have many attractive properties with potential applications in various fields. Despite their usefulness, however, the associated waste can be hazardous to the environment. To examine adverse effects in aquatic environments,Oryzias latipeswere exposed to MWCNTs dispersed in water for 14 days and apoptosis and antioxidant gene expression were observed. This work showed that in gills exposed to 100 mg/L MWCNTs for 4 days, there was significantp53,caspase-3 (Cas3),caspase-8 (Cas8), andcaspase-9 (Cas9)gene expression relative to the controls, whilecatalase (CAT)andglutathione-S-transferase (GST)expression were reduced. At 14 days,CAT,GST, andmetallothionein (MT)were induced significantly in the gills andCas3,Cas8, andCas9were induced in the liver. No significant gene induction was seen in intestine. Intracellular reactive oxygen species (ROS) were increased significantly only at 14 days. Histologically, no apoptosis was observed with exposure to 100 mg/L MWCNTs for 21 days. The gills were more sensitive to MWCNT toxicity than the other organs. Males had higher apoptosis gene induction than females. These results demonstrated that MWCNTs could cause apoptosis in a manner influenced by tissue and gender in aqueous environments.

Effect of silicon in Pyropia yezoensis under temperature and irradiance stresses through antioxidant gene expression

2018 ◽  
Vol 31 (2) ◽  
pp. 1297-1302 ◽  
Author(s):  
Bao Le ◽  
Mawra Nadeem ◽  
Seung-Hwan Yang ◽  
Jong-Am Shin ◽  
Man-Gu Kang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Pyropia Yezoensis ◽  
Antioxidant Gene ◽  
Antioxidant Gene Expression
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