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find Keyword "多西环素" 4 results
  • Inhibitory effect of doxycycline on vasculogenic mimicry in retinoblastoma cell line in vitro

    Objective To investigate the effect of doxycycline on the proliferation and vasculogenic mimicry in retinoblastoma (RB) cell line in vitro. Methods RB cell line were tested for their ability to form perfusable tubular networks in 3D culture with doxycycline in the concentrations ranging from 5 to 20 mg/L, and CoCl2 was used as chemical hypoxia-inducing reagent to mimic tumor hypoxic microenvironment. The effect of doxycycline on proliferation were detected by MTT assay in vitro, and the effect on tube formation of RB cells were detected by tube-like structure formation assay and PAS staining. The mRNA levels of MMP2 and MMP9 at different hypoxic culture and different doxycycline concentrations were detected by semiquantitative reverse transcription polymerase chain reaction (RT-PCR). Results The micrograph showed that RB cells linked each other to form cavity and network tructure in 3D culture. the number of tubules in doxycycline group were significantly lower than which in the control group in the concentrations ranging from 5 to 20 mg/L (Plt;0.001).OD of doxycycline group was significantly lower than which in the control group (t=15.320,Plt;0.01) , The proliferation of RB cells had a negative correlation with the concentration of doxycycline (r =-0924, Plt;001). The levels of MMP2 and MMP9 mRNA of RB cells under hypoxia were significantly higher than which in the control group (t=16.469,Plt;0.01). As the concentration of doxycycline increased, the expression of MMP-2 and MMP-9 decreased. The result of double staining also showed that VM, formed by CD34negative and PASpositive tumor cells, existed in 12 simples of retinoblastoma. Conclusion RB cells have the capacity of selfmetamorphosing and vasculorizing in 3D culture. Doxycycline can inhibit their proliferation and vasculogenic mimicry formation in vitro by downregulating the expression of MMP-2 and MMP-9 .

    Release date:2016-09-02 05:42 Export PDF Favorites Scan
  • 鹦鹉热衣原体肺炎的临床诊疗特点

    目的 探讨鹦鹉热衣原体肺炎的临床诊疗特点。方法 收集2020年9月—2021年12月由苏州大学附属第一医院和附属独墅湖医院呼吸与危重症医学科收治的12例鹦鹉热衣原体肺炎患者的临床资料,进行总结分析。结果 12例患者均以高热、咳嗽为主要表现起病,9例患者接触过鹦鹉,3例接触过活禽。12例患者淋巴细胞计数均不同程度降低,2例患者白细胞、中性粒细胞和降钙素原明显升高;C反应蛋白、红细胞沉降率和D-二聚体均明显升高,而白蛋白水平明显降低,4例患者出现了低钾血症。1例重症患者合并了呼吸衰竭、心力衰竭、肝衰竭、肾衰竭及轻度精神症状。胸部CT均表现为单一肺叶或多肺叶炎症渗出和实变,5例合并有少量胸腔积液。患者初始经验性治疗效果均不理想,支气管肺泡灌洗液宏基因组二代测序技术检测诊断鹦鹉热衣原体肺炎后,及时调整以四环素类药物和(或)喹诺酮类抗生素为基础的治疗方案后病情均好转出院。结论鹦鹉热衣原体肺炎临床相对少见,临床表现以及常规检查很难与其他社区获得性肺炎鉴别,易导致误诊和漏诊,应引起临床医生的重视,宏基因组二代测序技术在鹦鹉热衣原体肺炎诊疗方面具有重要指导意义,值得临床应用和推广。

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  • Clinical and pathological characteristics of Chlamydia psittaci pneumonia

    Objective To analyse the clinical and pathological characteristics of Chlamydia psittaci pneumonia, and increase the comprehensive understanding of the Chlamydia psittaci pneumonia. Methods Five patients diagnosed with Chlamydia psittaci pneumonia were selected in this hospital from November 2021 to November 2022, and their clinical and pathological characteristics were analysed. Results Out of these five patients, 2 patients were male and 3 were female, with a mean age (65±9) years and length of hospital stay (11 - 13) d. The first symptom of all five patients was fever; 3 patients were complicated with hypoxemia; there were several accompanying symptoms, including chilly, shiver, fatigue, headache, cough, muscle soreness, hearing loss and so on. In the laboratory indicators, white blood cell count was not significantly abnormal, the C-reactive protein and procalcitonin were high. In the chest CT, the diseased regions were mostly located in unilateral lesions, 3 cases were on the right side; the forms included pulmonary consolidation, lung glass opacity, pleural effusion, pleural thickening, etc.; the mNGS results of bronchoalveolar lavage fluid showed the Chlamydia psittaci; the pathology of lung biopsy showed significant proliferation of fibers in the interstitial lung and partly fibrosis, with histiocytic reaction and minimal lymphocyte infiltration. Conclusion Clearly diagnosing patients with pneumonia which are suspected being infected Chlamydia psittaci as soon as earlier can prompt anti-infection treatment, and avoid further damage to the lung interstitium, eventually decrease the deterioration of lung function and progression to severe pneumonia.

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  • 多西环素用于喹诺酮类治疗失败的大环内酯类耐药肺炎支原体肺炎一例

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