Diagnosis and management of prostatic cancer (PCa) cases mainly rely on levels of prostatic- specific antigen (PSA) levels. In the majority of cases, rising of PCa is usually responsible for elevated PSA. However, a wide variety of prostatic abnormalities, such as benign prostatic hyperplasia and infection or inflammation of the prostatic glands, may also impact prostate levels. Due to the low specificity and sensitivity of the PSA test, elevated PSA levels can lead to unnecessary prostate biopsies or surgical interventions, constituting this diagnostic modality a controversial screening test. Therefore, the discovery of new non-invasive biomarkers, such as urinary miRNAs, could shed light on the optimal management and follow-up of patients with prostatic lesions. This study aims to evaluate the utility of urinary miRNAs as a new PCa prognostic biomarker, discovering its current limitations and proposing methods to overwhelm current challenges.
Different modes of gene regulation, such as histone modification, transcription factor binding, DNA methylation, and microRNA (miRNA) expression, are critical for the spatiotemporal expression of genes in developing orofacial tissues. Aberrant regulation in any of these modes may contribute to orofacial defects. Noncoding RNAs (ncRNAs), such as long ncRNAs (lncRNAs) and circular RNAs (circRNAs), have been shown to alter miRNA expression, and are thus emerging as novel contributors to gene regulation. Some of these appear to function as 'miRNA sponges', thereby diminishing the availability of these miRNAs to inhibit the expression of target genes. Such ncRNAs are also termed competitive endogenous RNAs (ceRNAs). Here, we examine emerging data that shed light on how lncRNAs and circRNAs may alter miRNA regulation, thus affecting orofacial development and potentially contributing to orofacial clefting.
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