LncRNA in Different Subcellular Structures / 中国生物化学与分子生物学报

Long non-coding RNA (lncRNA) are non-coding RNA (ncRNA) greater than 200nt inlength, which were initially considered as transcriptional " junk" with no biological function. As researchprogressed, lncRNA were found to be involved in many biological regulatory processes, such aschromosome silencing, chromatin modification, transcriptional activation and interference. Thesebiological regulatory processes are closely related to the structure and spatial and temporal specificexpression of lncRNA. In addition, the corresponding regulatory mechanisms of lncRNA with differentstructures and locations are different. When lncRNA are located in the nucleus, they mostly regulate geneexpression at the transcriptional level and epigenetically, including histone modifications, DNAmethylation, chromosome remodeling and other modification processes. In contrast, lncRNA in thecytoplasm mostly play regulatory roles at the post-transcriptional and translational levels, and themechanisms of action and functions of lncRNA vary among different organelles, all of which illustrate theimportance of the location of lncRNA on their functional performance. In addition, exosomes are also richin lncRNA, and these lncRNA can be delivered to the corresponding sensitive cells through intercellularcommunication to generate the corresponding regulatory mechanisms. In addition, aberrant expression oflncRNA in different structures is often a key factor in the development and progression of related diseasesand cancers. Studying the enrichment of lncRNA in different subcellular structures can help understandthe specific roles played by lncRNA in regulating body homeostasis, disease and cancer occurrence anddevelopment, as well as growth and development of plants and animals, as well as provide a newtheoretical basis for subsequent studies on targeted therapies and improving animal productionperformance. This paper outlines the latest research progress on the different regulatory mechanisms oflncRNA in chromosomes, membraneless substructures, cytoplasm (endoplasmic reticulum, ribosomes, mitochondria, lysosomes), exosomes and other locations, as well as describes the processes of relateddiseases and cancers caused by lncRNA abnormalities within the corresponding structures. Finally, anoutlook on lncRNA research is given with the aim of providing a corresponding theoretical basis for futurestudies.

Di-(n-butyl)-phthalate-induced oxidative stress and depression-like behavior in mice with or without ovalbumin immunization / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To investigate the relationship between atopic allergy and depression and the role of DBP in the development of depression.</p><p><b>METHODS</b>BALB/c mice were randomly divided into eight groups: saline; ovalbumin (OVA)-immunized; saline+DBP (0.45 mg/kg•d); saline+DBP (45 mg/kg•d); DBP (0.45 mg/kg•d) OVA-immunized; DBP (45 mg/kg•d) OVA-immunized; saline+hydrocortisone (30 mg/kg•d); and hydrocortisone (30 mg/kg•d)-exposed OVA-immunized. Behavior (e.g. open-field, tail suspension, and forced swimming tests), viscera coefficients (brain and spleen), oxidative damage [e.g. reactive oxygen species (ROS), malondialdehyde (MDA), and glutathione (GSH)], as well as levels of IgE and IL-4, were then analyzed.</p><p><b>RESULTS</b>In the saline and OVA groups, the degree of depression symptoms in mice increased with increasing DBP concentration. Additionally, the OVA-immunity groups were associated with more serious depressive behavior compared with the same exposure concentration in the saline group. Oxidative damage was associated with a dose-dependent increase in DBP in the different groups. IL-4 and IgE levels were associated with low-dose DBP stimulation, which changed to high-dose inhibition with increasing DBP exposure, possibly due to spleen injury seen at high DBP concentrations.</p><p><b>CONCLUSION</b>Development of an atopic allergy has the potential to increase the risk of depression in mice, and it seems that DBP helps OVA to exert its effect in our present model. Moreover, the results of our study implicate a certain connection between brain oxidative stress and depression, which deserves a further exploration.</p>

Induction of differentiation in human hepatocarcinoma cells by isoverbascoside.

Isoverbascoside, a phenylethanoid glycoside, was isolated from Chinese folk medicine herb Pedicularis striata Pall. Here we report that isoverbascoside is capable of inducing differentiation in human hepatocellular carcinoma (HCC) cell line SMMC-7721. When treated with isoverbascoside, the proliferation of SMMC-7721 cells was markedly inhibited in a dose- and time-dependent manner, and the average cell population doubling time was delayed. Exposure of cells to 20 micromol/l isoverbascoside led to the decline of colony formation efficiency on soft agar, induced G0/G1 arresting, and resulted in the decrease of gamma-glutamyltransferase (gamma-GT) activity and the increase of tyrosine aminotransferase (TAT) activity, two marker enzymes, respectively, representing HCC malignance and differentiation stage. These results suggest that isoverbascoside possess the activity of inducing differentiation in SMMC-7721 cells.