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Sökning: WFRF:(Feng Shuang)

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11.
  • Yu, Miao mei, et al. (författare)
  • Apolipoprotein M increases the expression of Vitamin D receptor mRNA in colorectal cancer cells detected with duplex fluorescence reverse transcription-quantitative polymerase chain reaction
  • 2017
  • Ingår i: Molecular Medicine Reports. - : Spandidos Publications. - 1791-2997 .- 1791-3004. ; 16:2, s. 1167-1172
  • Tidskriftsartikel (refereegranskat)abstract
    • Apolipoprotein M (ApoM) and the Vitamin D receptor (VDR) are apolipoproteins predominantly presenting in high-density lipoprotein (HDL) and a karyophilic protein belonging to the steroid-thyroid receptor superfamily, respectively. Previous studies have demonstrated that ApoM and VDR are associated with cholesterol metabolism, immune and colorectal cancer regulation. In order to investigate whether ApoM affected the expression of VDR in colorectal cancer cells, a single-tube duplex fluorescence reverse transcription-quantitative polymerase chain reaction (RT-qPCR) system was developed to simultaneously detect the mRNA levels of VDR and GAPDH in HT-29 cells overexpressing ApoM. The results demonstrated that the amplification products were confirmed as the specific fragment of VDR/GAPDH using the DNA sequencing instrument. The sensitivity, linear range, correlation coefficient, amplification efficiency, intra-assay and inter-assay coefficients of variation were 40 copies/μl, 4.00×101-4.00×105 copies/μl, 0.999, 92.42%, 0.09-0.34% and 0.32-0.65% for VDR, and 40 copies/μl, 400×101-4.00×105 copies/μl, 0.999, 98.07%, 0.19-0.43% and 0.40-0.75% for GAPDH, respectively. The results indicated that the expression of VDR mRNA was significantly higher in HT-29 cells overexpressing ApoM, compared with the negative control group (P<0.05). In conclusion, the current study successfully developed the single-tube duplex RT-qPCR to simultaneously detect VDR and GAPDH expression in colorectal cancer cells. The methodology results demonstrated that the duplex RT-qPCR system with high sensitivity and specificity could ensure the objectivity and credibility of the detection. The present study confirmed that ApoM significantly increased the expression of VDR in HT-29 cells. In addition, it was hypothesized that ApoM may be involved in antineoplastic activity via the upregulation of VDR expression, which may provide novel directions for the investigation of ApoM in cancer.
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12.
  • Zivanovic, Andrej, et al. (författare)
  • Co-evolution of AR gene copy number and structural complexity in endocrine therapy resistant prostate cancer
  • 2023
  • Ingår i: NAR Cancer. - : Oxford University Press. - 2632-8674. ; 5:3
  • Tidskriftsartikel (refereegranskat)abstract
    • Androgen receptor (AR) inhibition is standard of care for advanced prostate cancer (PC). However, efficacy is limited by progression to castration-resistant PC (CRPC), usually due to AR re-activation via mechanisms that include AR amplification and structural rearrangement. These two classes of AR alterations often co-occur in CRPC tumors, but it is unclear whether this reflects intercellular or intracellular heterogeneity of AR. Resolving this is important for developing new therapies and predictive biomarkers. Here, we analyzed 41 CRPC tumors and 6 patient-derived xenografts (PDXs) using linked-read DNA-sequencing, and identified 7 tumors that developed complex, multiply-rearranged AR gene structures in conjunction with very high AR copy number. Analysis of PDX models by optical genome mapping and fluorescence in situ hybridization showed that AR residing on extrachromosomal DNA (ecDNA) was an underlying mechanism, and was associated with elevated levels and diversity of AR expression. This study identifies co-evolution of AR gene copy number and structural complexity via ecDNA as a mechanism associated with endocrine therapy resistance.
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