ABSTRACT
The COVID-19 pandemic caused by SARS-CoV-2 has brought about an unprecedented crisis, taking a heavy toll on human health, lives as well as the global economy. There are no SARS-CoV-2-specific treatments or vaccines available due to the novelty of this virus. Hence, rapid development of effective vaccines against SARS-CoV-2 is urgently needed. Here we developed a pilot-scale production of a purified inactivated SARS-CoV-2 virus vaccine candidate (PiCoVacc), which induced SARS-CoV-2-specific neutralizing antibodies in mice, rats and non-human primates. These antibodies potently neutralized 10 representative SARS-CoV-2 strains, indicative of a possible broader neutralizing ability against SARS-CoV-2 strains circulating worldwide. Immunization with two different doses (3g or 6 g per dose) provided partial or complete protection in macaques against SARS-CoV-2 challenge, respectively, without any antibody-dependent enhancement of infection. Systematic evaluation of PiCoVacc via monitoring clinical signs, hematological and biochemical index, and histophathological analysis in macaques suggests that it is safe. These data support the rapid clinical development of SARS-CoV-2 vaccines for humans. One Sentence SummaryA purified inactivated SARS-CoV-2 virus vaccine candidate (PiCoVacc) confers complete protection in non-human primates against SARS-CoV-2 strains circulating worldwide by eliciting potent humoral responses devoid of immunopathology
ABSTRACT
Objective To screen the tumor metastasis related differentially expressed genes in hepatocelluar carcinoma (HCC)cells 7402 after stable transfection with FATE/BJ‐HCC‐2 gene .Methods Total RNA was extracted from FATE/BJ–HCC‐2‐transfected HCC(5B4)cells and empty vector control (Mock)cells respectively .Differentially expressed genes were obtained using cDNA microarray .Results Compared with Mock cells ,a total of 1 694 differentially expressed genes were screened out in 5B4 cells ,the 11 gene expressions had obvious differences ,among which the expression amounts in 7 genes were significantly in‐creased ,including MMP‐1 ,PTGS2 ,FN ,CA9 ,IL‐8 ,ILK and Areg .The fold changes were 81 .80 ,49 .86 ,11 .30 ,16 .26 ,3 .48 ,2 .79 and 2 .20 ,respectively .The expression amounts in 4 genes were significantly decreased ,including E‐cadherin ,E‐cadherin , RHOBTB3 ,ALPP and HLA‐DRB4 .The fold changes were -5 .42 ,-2 .23 ,-5 .93 and -8 .03 ,respectively .Conclusion Adopting gene microarray technology can carefully screen the differentially expressed genes of FATE/BJ‐HCC‐2 involved HCC metastasis ,its final goal is to lay a solid theoretical foundation for studying the HCC metastasis mechanism .
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Objective To investigate the detection of BJ-75A-9 mHNA, WNX and CK19 mRNA in peripheral blood cells of lung cancer patients and evaluate its diagnostic value. Methods The expression of BJ-TSA-9, LUNX and CK19 mRNA in peripheral blood cells was delected from 84 lung cancer patients, 32 benign lung lesions and 20 healthy volunteers by nested reverse transcription polymerase chain re-action (Nested-RT-PCR). Results The positive detection rates of BJ-75A-9,LUNX and CK19 mRNA in the peripheral blood of the pa-tients with lung cancer were 59.5%,40.4%and 22.6% respectively. In the 32 peripheral blood samples of the patients with benign lung le-sions,the positive detection rate of BJ-TSA-9,LUNX and CK19 mRNA were 9.3%, 12.5% and 6.3% respectively. No expression of BJ-TSA-9,LUNX and CK19 was detected in lhe samples of the healthy volunteers. The expression level of BJ-TSA-9, WNX and CKI9 mRNA in the peripheral blood of lung cancer stage IV patients was significantly higher than those of stages II and ID (P< 0.05). Conclusion RT-PCR amplification of BJ-TSA-9, LUNX and CK19 mRNA are an efficient way to detect early haematogenous dissemination of cancer cells for lung cancer patients. The detection of BJ-TSA-9 expression is sensitive and specific for lung cancer,and it is superior to both LUNX and CK19 mRNA. The expression of BJ-7SA-9 mRNA in peripheral blood might predict the hematogenous metastatic spreading of lung cancer cells.
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Objective:To apply the strategy of proteomics with two dimensional gel electrophoresis(2DE) in esophageal cancer.Methods:the protein of esophageal cancer tissues and its adjacent normal tissue were separated by 2DE, the gels were analyzed with software ImageMaster4.01 to find out the spots different between cancer and control, and the proteins in the spots were identified by matrix associated laser desorption/ionization time of flight(MALDI TOF) mass spectrometry.Results:a new reasonable strategy of study for proteomics on esophageal cancer was raised and candidate cancer marker of two pyruvate kinase isozyme were found under such strategy.Conclusion:Under reasonable strategy, the analysis of proteomics with 2DE on human tissue is a useful method for discovering valuable cancer marker candidates. Pyruvate kinase isozyme M2/M1 which were found in cancer tussues will be very important in diagnosis and treatment of esophageal cancer.
