• Hui Chen

      Articles written in Journal of Genetics

    • Genetic relationships among buckwheat (Fagopyrum) species from southwest China based on chloroplast and nuclear SSR markers

      Zizhong Tang Ling Huang Junbo Gou Hui Chen Xueyi Han

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    • The jasmonate-responsive transcription factor CbWRKY24 regulates terpenoid biosynthetic genes to promote saponin biosynthesis in Conyza blinii H. Lév.


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      Conyza blinii H. Lév., the most effective component is saponin, is a biennial medicinal material that needs to be overwintered. WRKY transcription factors family is a large protein superfamily that plays a predominant role in plant secondary metabolism, but their characteristics and functions have not been identified in C. blinii. The CbWRKY24 sequence was selectedfrom the transcriptome database of the C. blinii leaves constructed in our laboratory. Phylogenetic tree analysis revealed that it was associated with AaWRKY1 which can regulate artemisinin synthesis in Artemisia annua. Expression analysis in C. blinii revealed that CbWRKY24 was mainly induced by methyl jasmonate (MeJA) and cold treatments. Transcriptional activity assay showed that it had an independent biological activity. Overexpression of CbWRKY24 in transient transformed C. blinii resulted in improved totalsaponins content, which was attributed to upregulate the expression level of keys genes from mevalonate (MVA) pathway in transient transformed plants compared to wild type (WT) plants. Meanwhile, overexpression the CbWRKY24 in transient transformed tomato fruits showed that the transcript level of related genes in lycopene pathway decreased significantly when compared to WT tomatofruits. Additionally, the MeJA-response-element was found in the promoter regions of CbWRKY24 and the histochemical staining experiments showed that promoter had GUS activity in transiently transformed tobacco leaves. In summary, our results indicated that we may have found a transcription factor that can regulate the biosynthesis of terpenoids in C. blinii.

    • Abnormally expressed lncRNAs in the prognosis and clinicopathology of oesophageal cancer: a systematic review and meta-analysis


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      The relationship between the long noncoding RNA (lncRNA) expression and oesophageal cancer prognosis has been widelystudied, but less consensus has been reached. We conducted this study to evaluate the relationship between the expression of lncRNAs and the prognosis and clinical pathology of oesophageal cancer. We conducted a systematic search of PubMed, EMBASE and Cochrane Library until 25 January 2019. Studies that evaluated the associations of a specific lncRNA with survival and/or clinicopathology of oesophageal cancer were included. Pooled hazard ratios (HRs), odds ratios (ORs), and corresponding 95% confidence intervals (CIs) were calculated using fixed or random-effect models. Sensitivity analysis was used to verify the stability of results. Publication bias was detected usingBegg tests and adjusted utilizing the trim-and-fill method if a bias existed. A total of 51 studies comprising 6510 patients and regarding 41 lncRNAs were included in the present systematic review and meta-analysis. The results showed that dysregulation of lncRNAs was associated with overall survival, disease-free survival, and progression-free survival. The expression of lncRNAs was related to some certain clinicopathological parameters of oesophageal cancer, including tumour size, T classification, lymph node metastasis, tumour nodemetastasis (TNM) stage and differentiation. Among these findings, lncRNA AK001796, CASC9, HOTAIR, MALAT1 and UCA1 wereidentified and were expected to be ideal biomarkers for the prognosis and clinicopathology of oesophageal cancer. Although significant publication bias was observed in some studies, the results were not changed after adjustment using the trim-and-fill method. Abnormal lncRNA-expression profiles could serve as a promising indicator for prognostic evaluation of patients with oesophageal cancer. The combination of these lncRNAs will contribute to clinical decision-making in the future.

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