Hypoxia-inducible factor (HIF) is a main heterodimeric transcription factor that regulates the cellular adaptive response to hypoxia by stimulating the transcription of a series of hypoxia-inducible genes. HIF is frequently upregulated in solid tumors, and the overexpression of HIF can promote tumor progression or aggressiveness by blood vessel architecture and altering cellular metabolism. In this review, we focused on the pivotal role of HIF in tumor angiogenesis and energy metabolism. Furthermore, we also emphasized the possibility of HIF pathway as a potential therapeutic target in cancer.

The purpose of this study is to explore the role of hypoxia on the invasion and metastasis of laryngeal carcinoma. The invasion and migration ability of laryngeal cancer SCC10A cell was detected by transwell assay. Western blot was applied to analyze the expression of EMT-related proteins. Fifty-seven samples from postoperative patients with laryngeal cancer were collected to study. Immunohistochemistry was used to examine the expression of GLUT-1 and EMT-related proteins (Vim, E-cad, N-cad) in normal laryngeal squamous epithelial tissue, laryngeal cancer adjacent tissues and laryngeal squamous cell carcinoma tissues. Hypoxia promoted laryngeal cancer cell invasion and migration. Hypoxia also enhanced the expression of GLUT-1, vimentin and N-cad, which exist statistically significant correlation with the clinical staging and lymph node metastases (P < 0.05). The expression of GLUT-1 is positively correlated with Vim and N-cad expression in laryngeal squamous cell carcinoma tissues, but negatively correlated with E-cad expression. The patient survival rate with the positive expression of GLUT-1, Vim and N-cad becomes much shorter compared with those with negative expression of GLUT-1, Vim and N-cad (P < 0.05). Hypoxia promoted laryngeal cancer cell invasion and migration via EMT.

Seed heteromorphism provides plants with alternative strategies for survival in unfavourable environments, which may not only increase the chances of successful germination, but may also have an impact on characters of the descendants. However, Cao et al. found that the different properties of the dimorphic seeds of Suaeda aralocaspica (i.e. black and brown) had no effects on their descendants' growth and physiological responses to salinity: all descendants required salinity for optimal growth and adaptation to their natural habitat.

Abstract. The aim of the present study was to verify whether overexpression of CXC receptor 4 (CXCR4) promotes the invasion and migration of non-small cell lung cancer (NSCLC) via epidermal growth factor receptor (EGFR) and matrix metallopeptidase-9 (MMP-9), and to detect the association between CXCR4, EGFR and MMP-9. The effects of overexpression of CXCR4 on lung cancer cell functions were investigated by migration and invasion assays. Western blotting and zymograph assays were used to analyze the protein expression levels of EGFR and the production of MMP-9, respectively. Immunohistochemistry was applied to analyze the expression of EGFR, CXCR4 and MMP-9 in NSCLC. Statistical analyses were used to detect the associations among EGFR, CXCR4 and MMP-9 in NSCLC. Finally, survival analyses were performed. CXCR4 overexpression enhanced cell motility and invasion. CXCR4 also promoted expression of EGFR and elevated MMP-9 production. CXCR4, EGFR and MMP-9 were highly expressed in NSCLC, and were not identified as associated with age and sex (P>0.05). However, they were associated with tumor differentiation and lymph node metastasis (P<0.05). CXCR4, EGFR and CXCR4 expression were positively associated with one another in NSCLC (P<0.05). In addition, patients with positive expression of CXCR4, EGFR or MMP-9 in tumors exhibited significantly shorter overall survival compared with those with negative expression (P<0.05). In conclusion, CXCR4 overexpression enhanced cell motility and invasion via EGFR and MMP-9. CXCR4, EGFR and MMP-9 were identified as highly expressed in NSCLC, and there was positive correlation among them.

Laryngeal carcinoma (LC) is one of the most common malignant tumors of all head and neck squamous cell carcinomas (HNSCCs). However, the molecular mechanism and genetic basis of the development of LC have not been fully elucidated. To explore the possible mechanism, targeted proteomic analysis was performed on Bcl-2-associated proteins from LC cells. According to our results, 35 proteins associated with Bcl-2 were identified and Hsp90β was confirmed by co-immunoprecipitation and western blot analysis. Protein‑protein interaction (PPI) analysis indicated that Bcl-2‑Hsp90β interactions may be involved in the anti-apoptotic progression of LC. Further results revealed that disruption of the Bcl-2-Hsp90β interaction inhibited the anti-apoptotic ability of Bcl-2 and decreased the caspase activation in LC, which has broad implications for the better understanding of tumor formation, tumor cell survival and development of metastasis due to Bcl-2. Collectively, we report the mechanism by which Bcl-2 functions in LC as an anti-apoptotic factor in relation to its association with proteins and potentially identify a Bcl-2/Hsp90β axis as a novel target for LC therapy.

The purpose of this study is to measure the expression of microRNA-4463 and microRNA-6087 between normal persons and patients with hepatocellular carcinoma (HCC), and to clarify the meaning of them in the prognosis evaluation in HCC. Forty-five samples from healthy people and patients, who had been diagnosed with hepatocellular carcinoma before any treatment, were collected to study respectively. Real-time PCR was used to detect the expression of miRNA-4463 and miRNA-6087 in the serum of control group and hepatocellular carcinoma patients. The expression of miR-4463 in the serum of HCC patients was significantly higher than that in control group (P < 0.05), and the expression level was independent of gender, tumor size, cell types, stages, alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL) and HBsAg status (P > 0.05). But there was a significant difference of different level of AFP in HCC (P < 0.05), and the difference between the group of AFP lower than 400 ug/l and the control group is statistically significant (P < 0.05). Besides, the survival time had showed a significant difference at the high and low expression levels (P < 0.05). But the expression level of miRNA-6087 was no difference in HCC and control group. The disorder of miRNA-4463 occurred in HCC, even the AFP level doesn't rises. What's more, patients who get the high level of miRNA-4463 seem to have a shorter survival time. And it contributes great to the prognostic evaluation. This is the first study to illustrate the potential significance of miRNA-4463 in the prognosis in HCC.

e15550 Background: KRAS inhibitors exhibited promising efficacy as systemic therapy in KRAS G12C-mutant colorectal cancers (CRC) lately. Recent studies have revealed a number of genomic alterations related to acquired resistance to this type of drugs. The discovered resistant gene mutations include: 1. Novel acquired secondary KRAS mutations within the adagrasib-binding pocket such as Y96C, H95D/Q/R, R68S, 2. Activating mutations in genes ( KRAS, BRAF, MAP2K1) MAPK signaling pathway, 3. Oncogenic fusions involving ALK, RET, BRAF, RAF1, and FGFR3, 4. Gene amplifications in KRAS, MET, MYC. Although found as acquired resistance mechanism to KRAS inhibitors, these genomic alterations might be primary or secondary in the setting of other type of therapies. Characterizing the natural distribution of these genomic alterations in cancer patients would contribute to clarifying the application potential of KRAS inhibitors. We herein performed a large-sample size analysis in Chinese colorectal cancer. Methods: A total of 9385 early-stage, late-stage, treated or treatment-naive CRC were included in this analysis. Calling of single nucleotide variants (SNV), copy number variants (CNV), insertion/deletions (indels), fusions and evaluation of tumor mutational burden (TMB) were performed using a wide panel next-generation sequencing (NGS) testing. Results: 43.4% (4069/9385) cases were KRAS-mutant in this cohort. KRAS G12C account for 5.8% (236/4069) in all KRAS-mutant CRC, and 15.7% (37/236) were harbored the above resistance genomic alterations. Fifteen KRAS G12C-mutant CRC were detected to have activating MAPK mutations, including G12D/V (n = 6), G13D (n = 3), Q61H (n = 6), NRAS Q61K (n = 3), MAP2K1 K57T (n = 3), and BRAF V600E (n = 4). Ten KRAS G12C-mutant CRC were detected to have oncogenic fusions, including TGFBR2- CACNA1D (n = 3), TPM4- ALK (n = 1), FGFR3- TACC3 (n = 1), ETV6- SNRPC (n = 1), KAZN- PAX7 (n = 1), NRG1- TTC12 (n = 1), TCF7L2- EWSR1 (n = 1) and ERBB2 arrangement (n = 2). It is noteworthy that a single case was with 5 gene arrangement events in 17q ( ERBB2- ZPBP2, IKZF3- ERBB2, PGAP3- ERBB2, RARA- ERBB2, RARA- GRB7). Thirteen KRAS G12C-mutant CRC were detected to have amplifications in KRAS (n = 5), MYC (n = 5) and MET (n = 4) genes. TP53 (81%), APC (65%) and PIK3CA (32%) were the utmost frequent somatic mutational genes in this subgroup of CRC. In addition, all cases were microsatellite stable (MSS). Tumors harboring fusion variants showed relatively high TMB level in this cohort. Conclusions: Our analysis results indicate about 15% KRAS G12C-mutant Chinese CRC were probable resistant to KRASG12C inhibitor. One-third of these patients had co-existed oncogenic fusions and higher TMB levels, suggesting possibilities for other therapeutic choices.