AIM： To evaluate the efficacy of a new hepatitis C virus （HCV） core antigen assay developed in China. METHODS： After the determination of HCV infection, 49 serial samples were selected from II regular plasma donor...AIM： To evaluate the efficacy of a new hepatitis C virus （HCV） core antigen assay developed in China. METHODS： After the determination of HCV infection, 49 serial samples were selected from II regular plasma donors in 5 different plasma stations. To compare the performance of HCV core antigen detection and HCV PCR, these samples were genotyped, and each specimen was analyzed by ELISA for the detection of HCV core antigen and by qualitative HCV PCR. RESULTS： Among all of the sequential samples, the original 23 specimens were HCV RNA-negative, and 36 samples were HCV RNA-positive. Twenty-seven samples （75%） were HCV core antigen-positive from these HCV RNA-positive specimens. Conversely, 27 samples （93.2%） were found HCV RNA-positive in HCV core antigen- positive samples. Intervals between HCV RNA and HCV core antigen-positive, as well as between HCV core antigen-positive and HCV antibody-positive were 36.0 and 32.8 d, respectively. CONCLUSION： This HCV core antigen assay, developed in China, is able to detect much of anti-HCV-negative, HCV RNA-positive preseroconversion window period （PWP） plasma donations.展开更多
Objective: To explore the mechanism of Bushen Qiangji Granule(补肾强脊颗粒, BSQJ) in restraining the osteogenic differentiation of ankylosing spondylitis(AS) fibroblasts. Methods: Hip joint capsules were obtained from...Objective: To explore the mechanism of Bushen Qiangji Granule(补肾强脊颗粒, BSQJ) in restraining the osteogenic differentiation of ankylosing spondylitis(AS) fibroblasts. Methods: Hip joint capsules were obtained from AS patients(n=10) receiving total hip replacement and healthy hip joint capsules from patients with hip fracture(n=10) receiving surgery as a control. Finite fibroblast lines were established from these tissue samples to observe the effect of BSQJ on suppressing osteogenic differentiation of fibroblasts. The expression of osteogenic marker gene corebinding factor a1(Cbfa1) and Smad family proteins were examined by Western blot and real-time quantitative polymerase chain reaction(q PCR). Results: The m RNA expression level of Cbfa1 was significantly higher in AS fibroblasts than that in normal fibroblasts and the expression of p Smad1, p Smad5, Smad4 and Cbfa1 in AS fibroblasts was also higher, demonstrating the activation of the BMP/Smads signal pathway in AS fibroblasts. BSQJ-medicated serum not only restrained the m RNA and protein expression levels of Cbfa1 and inhibited protein expression level of Smad4 but also decreased the expression quantities of p Smad1 and p Smad5. Conclusions: BSQJ can inhibit osteogenic differentiation of AS fibroblasts in vitro by suppressing the activation of the BMP/Smads signal pathway. This may be the important molecular mechanism of BSQJ in regulating AS ossification.展开更多
基金Supported by the National Key Technologies R&D Program of China during the 10th Five-Year Plan, No. 2001BA705B06 National High Technology Research and Development Program of China (863 Program), No. 2006AA020907
文摘AIM： To evaluate the efficacy of a new hepatitis C virus （HCV） core antigen assay developed in China. METHODS： After the determination of HCV infection, 49 serial samples were selected from II regular plasma donors in 5 different plasma stations. To compare the performance of HCV core antigen detection and HCV PCR, these samples were genotyped, and each specimen was analyzed by ELISA for the detection of HCV core antigen and by qualitative HCV PCR. RESULTS： Among all of the sequential samples, the original 23 specimens were HCV RNA-negative, and 36 samples were HCV RNA-positive. Twenty-seven samples （75%） were HCV core antigen-positive from these HCV RNA-positive specimens. Conversely, 27 samples （93.2%） were found HCV RNA-positive in HCV core antigen- positive samples. Intervals between HCV RNA and HCV core antigen-positive, as well as between HCV core antigen-positive and HCV antibody-positive were 36.0 and 32.8 d, respectively. CONCLUSION： This HCV core antigen assay, developed in China, is able to detect much of anti-HCV-negative, HCV RNA-positive preseroconversion window period （PWP） plasma donations.
基金Supported by the National Natural Science Foundation of China(No.30472277 and No.30801507)Beijing Science and Technology Nova Program(No.713220)
文摘Objective: To explore the mechanism of Bushen Qiangji Granule(补肾强脊颗粒, BSQJ) in restraining the osteogenic differentiation of ankylosing spondylitis(AS) fibroblasts. Methods: Hip joint capsules were obtained from AS patients(n=10) receiving total hip replacement and healthy hip joint capsules from patients with hip fracture(n=10) receiving surgery as a control. Finite fibroblast lines were established from these tissue samples to observe the effect of BSQJ on suppressing osteogenic differentiation of fibroblasts. The expression of osteogenic marker gene corebinding factor a1(Cbfa1) and Smad family proteins were examined by Western blot and real-time quantitative polymerase chain reaction(q PCR). Results: The m RNA expression level of Cbfa1 was significantly higher in AS fibroblasts than that in normal fibroblasts and the expression of p Smad1, p Smad5, Smad4 and Cbfa1 in AS fibroblasts was also higher, demonstrating the activation of the BMP/Smads signal pathway in AS fibroblasts. BSQJ-medicated serum not only restrained the m RNA and protein expression levels of Cbfa1 and inhibited protein expression level of Smad4 but also decreased the expression quantities of p Smad1 and p Smad5. Conclusions: BSQJ can inhibit osteogenic differentiation of AS fibroblasts in vitro by suppressing the activation of the BMP/Smads signal pathway. This may be the important molecular mechanism of BSQJ in regulating AS ossification.
