Project description:Exosomes were isolated from plasma of n = 12 healthy donors (HD) and n = 16 head and neck cancer (HNSCC) patients. miRNA profiling of exosomes was performed using nCounter SPRINT system. miRNAs being predicted to target EMT-related genes (CDH1, VIM, TWIST1 and SNAI1/2) were selected and compared between HD and HNSCC patients.
Project description:Gene expression profile of platelets. In this study, we try to address the knowledge gap regarding liquid biopsy markers for early detection of non-small cell lung cancer (NSCLC) and head and neck squamous cell carcinoma (HNSCC). For that blood samples were collected in two time points, in the presence and absence of NSCLC or HNSCC. Platelets were isolated and gene expression evaluated by microarray technique.
Project description:Gene expression profile of platelets have been explored due to their stability and abundance in plasma. In this study, we try to address the knowledge gap regarding liquid biopsy markers for early detection of non-small cell lung cancer (NSCLC). For that blood samples were collected in two time points, in the presence and absence of NSCLC. Platelets were isolated and miRNA expression evaluated by microarray technique.
Project description:Exosomes were isolated from plasma and saliva of healthy individuals and head and neck cancer (HNSCC) patients. miRNA profiling of plasma- and saliva-derived exosomes was performed using nCounter SPRINT system. Diagnostic panels were selected from the exosomal miRNA profile.
Project description:The involvement of microRNAs (miRNAs) in cancer and their potential as biomarkers of diagnosis, prognosis and response to therapy is becoming increasingly appreciated. The etiology of head and neck squamous cell carcinoma (HNSCC) is predominantly associated with the synergistic effects of tobacco and alcohol use, as well as Human Papilloma Virus (HPV) infection, which embodies a distinct clinical and biological phenotype. We sought to examine whether the profile of miRNAs in HNSCC varies based on HPV status, and to identify specific miRNAs altered in head and neck carcinogenesis. Total RNA was isolated from 16 HNSCC fresh frozen primary tumors, 5 fresh frozen non-diseased head and neck epithelial tissues, and 2 HNSCC cell lines. The miRNA profile of 662 individual miRNAs in these tissues was examined by microarray. 18 miRNAs are significantly altered in their expression between normal tissues and HNSCC tumors and 5 miRNAs are identified as significantly differentially expressed between HPV-positive (HPV+) and HPV-negative (HPV-) tumors. A striking difference in expression pattern of miRNA was also observed between primary tissues and cell lines. These data suggest that the pattern of miRNA expression may be reflective of disease etiology, and may be useful in the realm of diagnostic biomarkers defining broadly responsive prevention and treatment strategies for HNSCC. These data also suggest that cultured tumor cell lines may be inappropriate for novel miRNA biomarker identification. Keywords: miRNA; Disease-state analysis Expression of 662 individual miRNA was assessed in16 HNSCC fresh frozen primary tumors, 5 fresh frozen non-diseased head and neck epithelial tissues, and 2 HNSCC cell lines were arrayed
Project description:Background: Predictive biomarkers for immune checkpoint inhibitors (ICIs) in non-small cell lung cancer (NSCLC) are limited. High-mannose glycans, enriched in tumors, can be selectively captured using OAA1 (recombinant OAA), a novel lectin. This study investigates whether plasma microRNAs (miRNAs) enriched by OAA1 serve as predictive markers of response to anti-PD-1 therapy. Methods: Pre-treatment plasma samples from 48 NSCLC patients treated with nivolumab were processed using OAA1 lectin columns. Levels of circulating miR-320a, miR-320b, and miR-3613-5p , which were identified as resistance associated miRNAs by microarray, were quantified with and without OAA1 enrichment. Associations with therapeutic response and overall survival were analyzed. Results: The three miRNAs were significantly upregulated in patients with stable or progressive disease compared to partial responders, but only after OAA1 enrichment. ROC and survival analyses showed improved predictive and prognostic power with OAA1-enriched miRNAs. For example, miR-3613-5p’s AUC improved from 0.837 to 0.897, and its hazard ratio increased from 3.386 to 7.815. Conclusion: OAA1-captured plasma miRNAs are associated with resistance to nivolumab and poor prognosis in NSCLC. This glycan-based enrichment strategy enhances the clinical value of circulating miRNAs and may complement tissue-based ICI biomarkers.