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BACKGROUND: In the first half 2022, SARS-CoV-2 variant omicron rapidly spread in Shanghai. CASE PRESENTATION: A 74-year-old woman, diagnosed as having rheumatoid arthritis for almost 30 years and treated with prednisone and cyclophosphamide, went through nasopharyngeal swab RNA test for SARS-CoV-2 for routine screening and was positive. She was then sent to the designated hospital. After negative RNA test, the patient returned to the former hospital for the treatment of basic disease. Unfortunately, the RNA test of this patient became positive again. And in this period, the clinical manifestations and computed tomography scans were more progressive. Finally, the patient passed away. CONCLUSION: There is a long way to go for us to study expression characteristics of SARS-CoV-2.
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Artrite Reumatoide , COVID-19 , Feminino , Humanos , Idoso , SARS-CoV-2 , RNA Viral , ChinaRESUMO
Background: Circular RNAs (circRNA) play an essential role in the tumorigenesis of non-small cell lung cancer (NSCLC). CircDTL is a novel identified circRNA with little information regarding its biological role. However, the role of circDTL in NSCLC has not been investigated yet. Method: In this study, the levels of circDTL in tissues and cells were measured by RT-PCR. Cell viability was measured by the CCK-8 assay. Cell migration and invasion were evaluated using the wound healing assay and transwell assay, respectively. Cell death was measured by the cell death ELISA kit. The levels of Fe2+, ROS, MDA and GSH were measured using the commercial kits. The interactions between miR-1287-5p and circDTL/3'UTR GPX4 were verified by dual-luciferase activity assay. The effects of circDTL on tumor growth were evaluated in vivo. Results: CircDTL was found to be upregulated and acted as an oncogene in NSCLC cells. Knockdown of circDTL promoted both apoptosis and ferroptosis of NSCLC cells. It was identified that circDTL exerts its oncogenic effects via the circDTL/miR-1287-5p/GPX4 axis and GPX4 inhibits both ferroptosis and apoptosis. Finally, this study showed that silencing of circDTL promoted the sensitivity of NSCLC cells to chemotherapeutic agents and inhibited the growth of tumors in vivo. Conclusion: CircDTL acts as an oncogene and exerts its effects via the miR-1287-5p/GPX4 axis in NSCLC, providing a potential therapeutic target for NSCLC cancer therapy.
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Objective To investigate the multi-drug resistance of Klebsiella strains and its mechanism.Methods Twenty strains of Klebsiella were isolated from the Affiliated Hospital of Medical College,Ningbo University from October 2009 to March 2011,in which 18 isolates were Klebsiella pneumonia and 2 were Klebsiella planticola. Drug sensitivity was determined by K-B tests. Drug resistant genes gyrA,parC (chromosome mediated) and aac( 6′)-I b-Cr,qnrA,qnrB,qnrS,qepA (plasmid mediated) were amplified by PCR and verified by direct automated fluorogenic sequencing. Results Resistance to β-1actams,aminoglycosides and quinolones was observed in 20 strains,and resistant rates were all above 80％.Klebsiella planticola strains were sensitive to imipenem and meropenem.Mutations of gyrA and parC genes existed in 18 strains (90％),and the positive rates of aac (6') -I b-C r,qnrB and qnrS were 60％ (12/20),20％ (4/20) and 20％ (4/20),respectively.Conclusion The mutations ofgyrA and parC genes may be the main cause of the resistance to quinolones in these strains.
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OBJECTIVE To analyze the antimicrobial resistance of Acinetobacter baumannii.METHODS A.baumannii was collected in our hospital from Jan 2003 to Dec 2006.Antimicrobial susceptibility testing was performed by disk-diffusion method.RESULTS A total of 548 A.baumannii were collected during 4 years.Of these isolates,130(23.7%) strains were from intensive care unit(ICU),190 strains(34.7%)from surgical,and others from medical and emergency departments.Most of strains(78.5%) were isolated from sputum,next from wound.The prevalence of A.baumannii was increasing during last 4 years.Results of susceptibility test showed that imipenem was the most active antibiotic against A.baumannii.The resistance rates were high to most antibiotics.Most of the resistant strains was from the ICU and the general ward differentand had significant difference.More than 50% of isolates were resistant to all antimicrobial agents tested except imipenem and ciprofloxacin in ICU.CONCLUSIONS The prevalence of A.baumannii is increasing.A.baumannii isolates show high resistance to multiple antibiotics,especially in ICU.
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Objectives To explore the expression of HER4 and VEGF in NSCLC and elucidate the relationship between their expression and the characteristic of clinical pathology. Methods 82 cases of paraffin-embedded tissues from informative NSCLC were used to detect the expression of HER4 and VEGF by means of immunohistochemical assay. Results HER4 is overexpressed in 65;9%of NSCLC cases. The overexpression of HER4 is correlated with the lymph node metastasis and TNM staging. VEGF is expressed in 53.7%of NSCLC cases. The expression of VEGF is also correlated with the lymph node metastasis and TNM staging, and the expression of VEGF is correlated with the overexpression of HER4.Conclusions HER4 and VEGF are the protein to regulate the growth of NSCLC and it might be a good way for the treatment of NSCLC by suppressing the overexpression of HER4 and VEGF.
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Objective To study the expression of HER4 in renal cell carcinoma and elucidate therelationship between HER4 expression and the clinical features of renal cell carcinoma. Methods Seventy-five cases of paraffin-embedded tissues from renal eell carcinoma were tested for the expres-sion of HER4 by immunohistochemistry.Forty-six cases were male,29 cases were female,the median age was 49 years old.All of these cases were diagnosed as renal cell carcinoma(51 cases of clear cell carcinoma,1 5 cases of granular cell carcinoma,and 9 cases of papillary adenocarcinoma).The control group was 20 cases of normal renal tissue 5 am away from the tumor.Descriptive analysis was applied to compare the differences used the x2.test.Statistical analysis was done by SPSS 10.0. Results HER4 was overexpressed in 78.7%RCC(9 cases with weak positive,18 cases moderate positive,41 caseS intensive positive and 7 cases negative)cases.The expression of HER4 was negative in all nor-mal tissue.The overexpression of HER4 was correlated with the lymph node metastasis and TNM staging(P<0.05). Conclusions HER4 overexpressionis correlated with Stage of RCC.
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OBJECTIVE To evaluate the clinical efficacy of piperacillin/tazobactam for acute exacerbation of chronic obstructive pulmonary disease(AECOPD) with pulmonary encephalopathy.METHODS Seventy three cases of AECOPD with pulmonary encephalopathy were randomized into piperacillin/tazobactam group and ceftazidime group,and sputum culture was underwent for each case before and after treatment.RESULTS The total efficacy rates and bacterial clean rates in piperacillin/tazobactam group and ceftazidime group were 91.67% and 88.89%,75.68% and 57.89%,respectively,and the differences between the two groups were statistically significant.CONCLUSIONS It suggested that piperacillin/tazobactam be a more effective drug for AECOPD with pulmonary encephalopathy.
