0.05).Conclusion At 4℃ storage time up to 2 weeks showed no significant influence on the contents of HbA2 detected by electrophoresis.

Objective To detect human parvovirus B19(B19V)DNA in source plasma pools and coagulation factor products and determine its prevalence and the level of contamination .Methods A pair of primers and a probe selected from the highly conserved sequences encoding the non-structural protein(NS1)of B19 were designed and synthesized.With the primer-probe combination ,source plasma pools and four types of coagulation factor products were determined for B 19V DNA by TaqMan real-time quantitative PCR.Results One-hundred and sixteen from 195 (59.49%) source plasma pools contained B19 DNA and concentrations up to 1.35 ×1010 copies/ml were measured.High frequencies of contamination were detected in factor Ⅷ (29 of 31; 93.55%), thrombin (10 of 10; 100%), fibrinogen (6 of 7; 85.71%) and prothrombin complex (8 of 9;88.89%).Conclusion These data show that B19V is a common contaminator in Chinese source plasma pools and coagulation factor products .Thus,B19V screening in Chinese source plasma seems desirable and significant for the safety of plasma derivatives in China .

[Abstrict]Objective To explore the key points and clinical value of combined direct and indirect extracranial-in?tracranial (EC-IC) bypass in patients with adult moyamoya disease. Methods Retrospective analysis of combined revas?cularization surgery in 25 adult patients with moyamoya disease. The frontal branch and parietal branch of the superficial temporal artery (STA) were dissected. Combined revascularization surgery consisted of direct (anastomosis between the su?perficial temporal artery and cortical branch of the middle cerebral artery) and indirect (encephalodurogaleosynan-giosis EDAS) surgeries. Clinical status was evaluated using the modified Rankin Scale and NIHSS score at 1 day before, 1 week and 3 months after surgery. Results Thirty lateralities were successfully performed on 25 patients. Postoperative angiogra?phy or CTA and cranial computer tomography perfusion imaging(CTP) were conducted to examine the patency of the di?rect anastomosis and cerebral blood flow in 23 patientswithin 1 weeks after surgery . The results showed that the anasto?motic vascular patency was excellent and the cerebral blood flow increased in parallel to the relief of the patients’s isch?emic symptoms. The median mRS scores were 3 (1,3) before surgery, 2 (1,3) 1 week and 1 (0,3) 1 month after surgery.The median mRS scores were significantly improved (Z=15.14, P<0.01). The median NIHSS scores was 5 (4,8) preopera?tively and 4(2,7) postoperation 1 week and 3(1,4) 3 months. The median NIHSS scores were also significantly improved (Z=11.36, P<0.01). Unfortunately, two patients had complication and left hemiparesis. One patient complicated with con?tralateral hemisphere infarction and the another one complicated with ipsilateral hemispheric hemorrhage after operation. Conclusions Combined revascularization surgery may result in satisfying improvement in clinical, angiographic, and he?modynamic states and prevention of recurrent stroke. The stabilized hemodynamic is the key point in peroperative period for moyamoya patients.

Objective:To investigate the complement C3a receptor 1 (C3AR1) expression in glioma and its mechanism in progressing malignancy.Methods:(1) The C3AR1 mRNA expression data and clinical information were obtained in 607 glioma patients from The Cancer Genome Atlas (TCGA) database and 656 glioma patients from Chinese Glioma Genome Atlas (CGGA) database; the differences in C3AR1 mRNA expression were analyzed among gliomas with different World Health Organization (WHO) grading. The overall survival and disease-free survival were compared between high and low C3AR1 mRNA expression patients obtained from TCGA database by Gene expression profiling interactive analysis (GEPIA). Gene body (GO) function analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis of C3AR1 related differentially expressed genes were performed by DAVID database. Correlation of C3AR1 mRNA expression with immune cell infiltration was analyzed using TIMER online website. (2) The brain tissues from 3 non-tumor patients and 9 glioma patients surgically resected in Department of Neurosurgery, First Affiliated Hospital of Xinxiang Medical University from January 2019 to September 2021 were collected; the C3AR1 protein expression was detected by Western blotting. (3) The in vitro cultured U87 and U251 cells were divided into negative control group and C3AR1 knockdown group ( C3AR1 being knocked down by lentivirus transfection); and CCK-8 assay, plate cloning assay and Transwell assay were used to detect the proliferation rate, number of colony formation and number of membrane penetrating cells. Western blotting was used to detect the nuclear factor-κB (NF-κB) signaling pathway protein expressions. Results:(1) In TCGA database, the C3AR1 mRNA expression in gliomas of WHO grading II, grading III and grading IV increased sequentially, with significant differences ( P<0.05). In CGGA database, the C3AR1 mRNA expression in glioma of WHO grading IV was statistically higher than that in gliomas of WHO grading II and grading III ( P<0.05). GEPIA showed that the overall survival and disease-free survival in the low C3AR1 mRNA expression group were statistically higher than those in the high C3AR1 mRNA expression group ( P<0.05). GO function analysis and KEGG pathway enrichment analysis revealed that C3AR1 related differentially expressed genes were more enriched in such biological processes and signaling pathways as calcium homeostasis, membrane structural valves, proton transmembrane transporter protein activity, chemokine signaling pathway and NF-κB signaling pathway. TIMER showed that C3AR1 mRNA expression in glioblastoma and low-grade glioma was positively correlated with infiltration degrees of B cells, CD4 + T cells, neutrophils, macrophages and dendritic cells, and C3AR1 mRNA expression in glioblastoma was negatively correlated with infiltration degree of CD8 + T cells ( P<0.05). (2) C3AR1 protein expression in glioma tissues was significantly higher than that in non-tumor tissues. (3) Compared with the negative control group, the C3AR1 knockdown group group had significantly lower proliferation rate, smaller numbers of colony formation and membrane penetrating cells, and lower expressions of NF-κB, phosphorylated (p)-NF-κB, p-NF-κB inhibitory protein (IκB)α, p-I-κB kinase (IKK)α and N-cadherin, and significantly higher E-cadherin expression. Conclusion:C3AR1 is highly expressed in glioma and progresses malignancy through NF-κB signaling pathway.