三阴性乳腺癌(triple negative breast cancer,TNBC)是一种特殊乳腺癌亚型,由于其耐药性强、侵袭性高、转移能力强、易复发及预后差等临床特点,导致临床治疗手段不足。CRISPR/Cas基因编辑系统的发展极大促进了对基因组结构和功能的理解...
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三阴性乳腺癌(triple negative breast cancer,TNBC)是一种特殊乳腺癌亚型,由于其耐药性强、侵袭性高、转移能力强、易复发及预后差等临床特点,导致临床治疗手段不足。CRISPR/Cas基因编辑系统的发展极大促进了对基因组结构和功能的理解,为研究疾病的发生发展提供了简单又有前途的工具。本综述描述了新兴的CRISPR/Cas技术及其对TNBC的新见解,展示了其临床应用的未来前景,并提出CRISPR技术与其他技术相结合,如三维体外细胞培养系统、单细胞测序和人工智能等,可早期诊断和精确治疗TNBC患者,从而达到精准医疗的目的。
To study the resistance mechanism of clinical isolates of Ureaplasma urealyticum resistant to fluoroquinolones Methods Thirteen isolates of Ureaplasma urealyticum resistant to six fluoroquinolones were selected out ...
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To study the resistance mechanism of clinical isolates of Ureaplasma urealyticum resistant to fluoroquinolones Methods Thirteen isolates of Ureaplasma urealyticum resistant to six fluoroquinolones were selected out of 184 clinical isolates and their QRDRs (quinolone resistance determining region) gyrA, gyrB, parC and parE were amplified by PCR Sequencing results were compared to those susceptible reference strains and a comparison of deduced amino acid sequences were performed Results Sequence comparison revealed a C to A change at 87nt of gyrA QRDR leading to the substitution of Asp95 with glutamic acid and a C to T change at 50nt of parC QRDR leading to the substitution of Ser80 with leucine Conclusion These results suggest that a C to A change at 87nt of gyrA QRDR and a C to T change at 50nt of parC QRDR are associated with fluoroquinolone resistance of Ureaplasma urealyticum
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