Coronary heart disease (CHD) is a global health concern, and its molecular origin is not fully elucidated. Dysregulation of ncRNAs has been linked to many metabolic and infectious diseases. This study aimed to explore the role of circRNAs in the pathogenesis of CHD and predicted a candidate circRNA that could be targeted for therapeutic approaches to the disease. circRNAs associated with CHD were identified and CHD gene expression profiles were obtained, and analyzed with GEO2R. In addition, differentially expressed miRNA target genes (miR-DEGs) were identified and subjected to functional enrichment analysis. Networks of circRNA/miRNA/mRNA and the miRNA/affected pathways were constructed. Furthermore, a miRNA/mRNA homology study was performed. We identified that hsa_circ_0126672 was strongly associated with the CHD pathology by competing for endogenous RNA (ceRNA) mechanisms. hsa_circ_0126672 characteristically sponges miR-145-5p, miR-186-5p, miR-548c-3p, miR-7-5p, miR-495-3p, miR-203a-3p, and miR-21. Up-regulation of has_circ_0126672 affected various CHD-related cellular functions, such as atherosclerosis, JAK/STAT, and Apelin signaling pathways. Our results also revealed a perfect and stable interaction for the hybrid of miR-145-5p with NOS1 and RPS6KB1. Finally, miR-145-5p had the highest degree of interaction with the validated small molecules. Henchashsa_circ_0126672 and target miRNAs, notably miR-145-5p, could be good candidates for the diagnosis and therapeutic approaches to CHD.

Objectives: The aim of study is to find out the role of chromium with biological antioxidant and how these can relate with the health of fiber glass workers. Study Design: Cross Sectional Study. Setting: Fiber glass industry Lahore. Period: July 2018 to Feb 2019. Material & Methods: Study was included the fifty workers of fiber glass industry with 4-5 years experience or time of exposure. A questionnaire was filled by each participant. Twenty individuals were taken as controls. Their blood sample was drawn to estimate the level of chromium and of biological antioxidants that include serum Catalase, Superoxide Dismutase, Glutathione and Malondialdehye. Results: Mean age of workers was 35 year with BMI 23.80 kg/m2. Their work duration in Fiber glass factory was 6-7 years. Levels of serum chromium and the biological antioxident was significantly high (P<0.001) in fiber glass workers as compared to the levels of these parameters of control. A positive weak correlation was observed between serum chromium and antioxidants MDA, SOD and catalase. On the other hand a moderate inverse correlation was observed between serum chromium and antioxidant GSH. Conclusion: It is concluded that high level of chromium in workers of fiber glass factory is responsible for increased levels of antioxidants in their body, which in long run may develop the diseases especially of respiratory tract.

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