TFIIB-related factor 2 regulates glucose-regulated protein 78 expression in acquired middle ear cholesteatoma

circ_0006168 expression serves as a potential biomarker of acquired middle ear cholesteatoma

OBJECTIVE

Acquired middle ear cholesteatomas (AMECs) is a pathological condition characterized by abnormal epithelial cell proliferation in the middle ear, often resulting from retraction pocket and epithelial migration theories. The aim of this study was to find the abnormal expressed circular RNAs (circ_RNAs) in AMECs and explore their role in the inflammatory response of AMECs.

METHODS

Thirty-two AMECs patients and 32 healthy volunteers were recruited. Expression levels of circ_RNAs and inflammatory genes were quantified via reverse transcription quantitative polymerase chain reaction. Concentrations of inflammatory cytokines in human AMECs or normal post-auricular skin samples were measured using enzyme-linked immunosorbent assay.

RESULTS

Results showed that circ_0006168 was higher expressed in AMECs. Receiver operating characteristic (ROC) curve analysis indicated that circ_0006168 might serve as a sensitive biomarker for diagnosing AMECs. Besides, AMECs samples showed increased inflammatory cytokines concentrations. Thirty-two AMECs patients were divided into the High (N = 17) and Low (N = 15) groups according to the expression of circ_0006168. The High group patients had more tinnitus and severe hearing loss than the Low group.

CONCLUSION

In summary, our findings suggested that circ_0006168 exacerbated inflammatory responses in AMECs, suggesting that circ_0006168 might be a potential biomarker in AMECs.

The Effect of Zbxz23ir-21 NANO(nanomaterials) Delivery Vector on Apoptosis and PTEN(phosphatase and tensin homolog deleted on chromosome ten)/PI3K(Intracellular phosphatidylinositol kinase)/AKT(related to the A and C kinase) in Children with CHOLESTEATOMA in Middle Ear

Cholesteatoma of the middle ear is a kind of cystic disease with clear boundary formed by the abnormal growth of keratosquamous epithelium in temporal bone. Cholesteatoma otitis caused by it is a common disease in otorhinolaryngology. The EPR effect promotes the selective distribution of macromolecular substances in tumor tissues, which can increase drug efficacy. The purpose of this paper is to prepare and deliver the mir34a small molecule regulator, rubine, by nanotechnology, and to deliver it to the cells successfully. It can passively target tumor tissue through EPR effect, and play its regulatory role on miR-34a, thus inhibiting the growth of cholesteatoma cells. The effects of nano delivery on apoptosis and PIEN/P13K/AKt of children with middle ear choledochoma were tested in this paper. The experimental results were conducted on cholesteatoma cells as cell lines and balb/c nude mice as experimental objects. The expression of PTEN/PI3K/AKT in experimental group and control group was detected by immunohistochemistry. Apoptosis was discussed by cell activity detection. The physical and chemical properties, encapsulation efficiency, drug release ability in vitro and antitumor activity of nanoparticles in vitro and in vivo were studied. The results of cell level experiments in vitro showed that free RUBINE caused about 15% apoptosis, which was not different from RC NPs. The results showed that the nanoparticles could improve the expression of miR-34 in the cells, and then regulate the expression of Bcl-2, Cdk6 and CyclinD1, and play the inhibitory effect of miR-34a on the proliferation and migration of tumor cells.