Therapeutic Targeting of microRNAs in Cancer: Future Perspectives.

Preclinical Research The discovery of microRNAs (miRNAs) and their link with cancer has opened a new era in cancer therapeutics. Approximately, 18 - 24 nucleotides long, miRNAs can up-regulate or down-regulate gene expression in many cancer types and are respectively categorized as oncogenes (oncomirs) or tumor suppressors. Expression profiles of miRNAs with biomarker potential can be used for the classification, diagnosis, therapeutic treatment, and prognosis of different cancer types. miRNA mimics and miRNA antagonists are the two main approaches to miRNA-based cancer therapies that respectively inhibit oncomirs or restore the expression of tumor suppressive miRNAs. This review serves to provide some general insight into miRNA biogenesis, cancer related miRNAs, and miRNA therapeutics.

Effect on anterior chamber bevacizumab injection combined with seton implantation in treatment of rubeosis iridis in neovascular glaucoma.

OBJECTIVE: To evaluate the effect of anti-VEGF (bevacizumab) injection to the posterior chamber (BIPC) behind the iris combined with seton implantation in treatment of neovascular glaucoma (NVG). METHODS: Twenty-eight eyes with NVG who underwent BIPC, prospectively evaluated. Anterior segment photographs were taken for grading of neovascularization on anterior segment in pretreatment period and at each follow-up. Grading and regression of rubeosis iridis was classified according to Teich and Walsh grading system and glaucoma filtration surgery with drainage device was performed following BIPC. RESULTS: The mean pre-BIPC IOP was 39.71 ± 7.09 mmHg, post-BIPC IOP in the 1st, 2nd day, 1st week, 1st, 3rd, 6th month were 19.7 ± 8.9 mmHg, 13.5 ± 6.7 mmHg, 9.9 ± 3.4 mmHg, 13.07 ± 5.3 mmHg, 16.6 ± 5.03 mmHg, 18.5 ± 3.8 mmHg, respectively. Twenty seven eyes underwent seton implantation surgery. No one had anterior segment bleeding during surgery. The pre-BIPC grades were Grade 4: 67.58%, Grade 3: 28.57%, Grade 2: 3.57%, no one had Grade 1or Grade 0, while post BIPC grade were at the 1st week Grade 1: 64.28%, Grade 0: 35.71%, no one had Grade 2 or more, at 1st month Grade 2: 3.57%, Grade 1: 39.28%, Grade 0: 57.14%, at 3rd month Grade 2: 17.85% Grade 1: 28.57%, Grade 0: 53.57%, no one had Grade 3 or more both in first and the third month, at 6th month Grade 3: 7.14%, Grade 2: 28.57%, Grade 1: 42.85%, Grade 0: 21.42%. and no one had Grade 4. CONCLUSION: Significant reduction of NV was observed during the first week. Minimal increasement was seen in third month, significant regression effect persisted for 6 months. BIPC inhibited the peroperative risk of anterior segment bleeding, increased the surgical comfort and prevented the failure of filtration procedure by inhibiting reproliferation.

Regulation of oncogenic genes by MicroRNAs and pseudogenes in human lung cancer.

Lung cancer is one of the most common mortal cancer types both for men and women. Several different biomarkers have been analyzed to reveal lung cancer prognosis pathways for developing efficient therapeutics and diagnostic agents. microRNAs (miRNAs) and pseudogenes are critical biomarkers in lung cancer and alteration of their expression levels has been identified in each step of lung cancer tumorigenesis. miRNAs and pseudogenes are crucial gene regulators in normal cells as well as in lung cancer cells, and they have both oncogenic and tumor-suppressive roles in lung cancer tumorigenesis. In this study, we have determined the relationship between lung cancer related oncogenes and miRNAs along with pseudogenes in lung cancer, and the results indicate their potential as biological markers for diagnostic and therapeutic purposes.

MicroRNAs and cancer; an overview.

MiRNAs are a family of small, endogenous, and evolutionarily conserved non-coding ribonucleic acids that have been involved in the regulation of several essential, cellular, and functional processes. MicroRNAs are known to play key roles in all types of cancer and function as oncogenes (oncomirs) or tumour-suppressors in up-regulation or down-regulation processes respectively. MiRNAs have potential power to be examined as prognostic and diagnostic biomarkers. Modulating miRNAs, based on two major approaches (miRNA mimics and miRNA antagonists), is used for clinical development of therapeutic miRNAs. This review emphasizes the latest discovery in the field of miRNA research involved in cancer, biomarkers, and therapeutics.