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Objective:To compare the expression and biological activity of glucosyl transferases (GTFs)of Streptococcus mutans (S.mutans)under normal outside environment between high temperature requirment serine proteinase A(HtrA)-deficient strains and high virulent strains isolated from children with high cario-susceptibility.Methods:The HtrA-deficient strains and high virulent strains of S.mutans were obtained by preliminary study.The strains were reanimated and incubated in BHI medium to exponential phase at tenth hour.The expression of gtfB,gtfC and gtfD were detected by real-time RT-PCR.The biological activity of the GTFs were detected by entong sulfuric acid method and Western Blot.Results:The expression of gtfs and GTFs in the HtrA-deficient strains was higher than those of high virulent strains,but the biological activity of the GTFs was lower.Conclusion:The HtrA gene plays an important regulatory role in the process of the GTFs expression of S.mutans isolated from children with high cario-susceptibility.
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Objective To investigate the relationship of HSP27 expression with treatment response ,remission rate ,prognosis in multiple myeloma(MM) patients .Methods Eighty‐six patients with MM first diagnosis and 27 relapse cases were collected re‐spectively .Control was defined as non‐hematological malignance .The MM patients divided into first diagnosis ,relapse conventional chemotherapy group and bortezomib group .HSP27 expression and protein level were measured on pre‐and post 1 ,2 and 3 treatment circles .Results The tendency of HSP expression and protein level:relapse‐MM patients> first‐diagnosis MM patients> control . HSP27 expression and level in Ⅲ phase was higher than those in Ⅱ phase for first‐diagnosis MM patients .Bortizomib‐containing chemotherapy protocol showed more effectively decrease on HSP27 than chemotherapy treatment only .At post‐1 treatment circle , HSP271 and delayed the relapse time .Conclusion BMMNC‐HSP27 expression and protein level is associated with staging ,treatment response and prognosis in MM patients .
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Objective To investigate the clinical manifestations,treatment and prognosis of reversible posterior leukoencephalopathy syndrome (RPLS) after acute lymphoblastic leukemia chemotherapy.Methods The clinical and imaging data of one case with acute lymphoblastic leukemia were analyzed and literatures were reviewed.Results The main clinical presentation of the patient included abdominal distension,repeated fever with fatigue.Depend on the results of the blood routine test and bone marrow relative examinations,the patient was diagnosed as acute lymphoblastic leukemia pro-B cell high risk group.After the induction therapy and consolidation chemotherapy,hypertension and neurological symptoms were appeared.Combined with the imaging examination,it was diagnosed as RPLS.Recieved active treatment,the patient recovered completely,and the imaging test was improved rapidly.Conclusion The causes of RPLS are variety,and its clinical manifestations and imaging test are non-specific.RPLS has a favorable prognosis.The correct diagnosis and treatment are the key points.
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Objective To investigate whether the Serum Ig is help to choose the optimal treatment in patients with immune thrombocytopenia(ITP) .Methods 128 ITP patients were collected for 3 years .All of ITP patients were treated with the step-style protocol including glucocorticoid(CsA)lombied IVIG ,Ciclosporin A and TPO receptor agonist lombied rituximab .The treatment re-sponse were evaluated according the comparison between the two groups namely ≤IgG ,IGM ,IgA median and > median groups . Results There was no relationship between the bleeding and IgA 、IgM、IgG level .Low IgM level was associated with first line treatment resistance and showed the response to CsA and TPO receptor agonist lombied rituximab .High IgA level was associated with the resistance of first line and CsA treatment ,but showed no response to TPO receptor agonist lombied rituximab .Conclusion Serum Ig level is helpful for the choice of optimal treatment strategies in adult IT P patients .
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Objective:To establish the technique for real-time fluorescence quantitative reverse transcription polymerase chain reaction(FQ-PCR)by DNA melting curve analysis for detecting the CDR3 shewing of TCR alpha gene repertoire in human peripheral blood.Methods:Total RNA of peripheral blood mononuclear cell(PBMC)from 4 healthy donors and 2 patients with lymphomatous leukemia were transcripted reversely into cDNA.The cDNA of 32 TRAV gene family CDR3 was amplified by FQ-PCR.Analysis of the monoclonal/oligoclonal/polyclonal CDR3 spectratyping with DNA melting curve.Results:The FQ-PCR products of 32 TRAV family CDR3 were showedas a blur land at the predicted of products size in healthy donors and parts of TRAV family CDR3 products disappeared in patients on 1.5% agarose gel by Gold-View staining.The 32 TRAV family CDR3 were showed with different frequencies by relative fluorescence quantitative in healthy donors and the patients.The CDR3 spetratyping for 32 TRAV families was showed as polyclonal peak(Gaussian distribution)in healthy donors but showed as different monoclonal/oligoclonal/polyclonal peak in the patients with lymphomatous leukemia with DNA melting curve analysis(we called "melting curve spectratyping of CDR3")Conclusion:The study suggests that the technique of "FQ-PCR with DNA melting curve analysis be convenience and celerity for detecting the CDR3 skewing of TCR alpha gene repertoire in human peripheral blood.