Growing with the wind. Ribosomal protein hydroxylation and cell growth

Integrated analysis of miRNA-mRNA regulatory network and functional verification of miR-338-3p in coronary heart disease

Coronary heart disease is a cardiovascular disease with high morbidity and mortality. Although great progress has been made in treatment, the prognosis is still very poor. Therefore, this project aims to screen potential diagnostic markers and therapeutic targets related to the progression of coronary heart disease. A total of 94 overlapping differentially expressed mRNAs and 70 differentially expressed miRNAs were identified from GSE20681, GSE12288, GSE49823, and GSE105449. Through a series of bioinformatics methods and experiment, we obtained 5 core miRNA-mRNA regulatory pairs, and selected miR-338-3p/RPS23 for functional analysis. Moreover, we found that RPS23 directly targets miR-338-3p by dual luciferase assay, western, and qPCR. And the expression of miR-338-3p and RPS23 is negatively correlated. The AUC value of miR-338-3p is 0.847. Downregulation of miR-338-3p can significantly inhibit the proliferation and migration of HUVEC. On the contrary, overexpression of miR-338-3p promoted the proliferation and migration of HUVEC. In addition, the interference of RPS23 expression can reverse the regulation of miR-338-3p on HUVEC proliferation. In conclusion, miR-338-3p/RPS23 may be involved in the progression of coronary heart disease, and miR-338-3p may be a diagnostic biomarker and therapeutic target for coronary heart disease.

Molecular characterization and expression of RPS23 and HPSE and their association with hematologic parameters in sheep

Ribosomal protein S23 (RPS23) and Heparanase (HPSE) were located on chromosome 5 and chromosome 6, respectively, which play vital roles in protein synthesis and immunity. The objective of this study was to clone RPS23 and HPSE and to detect the expression levels of RPS23 and HPSE and the polymorphisms of RPS23 and HPSE associated with the hematologic parameters by using qRT-PCR, DNA sequencing and KASPar assay. The quantitative real-time PCR (RT-qPCR) showed that the two genes were expressed widely in the ten tissues of sheep. The expression levels of RPS23 and HPSE were the highest in lung and liver, respectively. The expression levels of RPS23 and HPSE in lung and liver increased from 0 to 3 months, decreased from 3 to 6 months, respectively. Furthermore, two mutations g.720 A > G and g.1077 G > A were detected in the RPS23 and HPSE, respectively, which were confirmed to be significantly associated with hematologic parameters. These results supported RPS23 g.720 A > G and HPSE g.1077 G > A as genetic markers of sheep.

Hydroxylation of protein constituents of the human translation system: structural aspects and functional assignments

During the current decade, data on the post-translational hydroxylation of specific amino acid residues of some ribosomal proteins and translation factors in both eukaryotes and eubacteria have accumulated. The reaction is catalyzed by dedicated oxygenases (so-called ribosomal oxygenases), whose action is impaired under hypoxia conditions. The modification occurs at amino acid residues directly involved in the formation of the main functional sites of ribosomes and factors. This review summarizes currently available data on the specific hydroxylation of protein constituents of eukaryotic and eubacterial translation systems with a special emphasis on the human system, as well as on the links between hypoxia impacts on the operation of ribosomal oxygenases, the functioning of the translational apparatus and human health problems.