Objective To investigate the allele and specificity distribution situation of HLA-B15 group and HLA-B40 group antigens among Han population in Guangxi area and to explore their possible influence on transplantation donors selection in clinic.Methods The blood samples of 1 644 Han donors in Guangxi region were performed the HLA-B genotyping by PCR-SBT,the frequencies of each allele were calculated by the direct computing method.The antigen specificity of various alleles were analyzed,then the gene frequencies of HLA-B15 and HLA-B40 groups were compared with those from other populations.Results The gene frequency at HLA-B locus in 1 644 Han persons was inconsistent with the Hardy-Weinberg equilibrium(P<0.05).Fourteen alleles in HLA-B15 group were detected out,which belonged to 5 kinds of antigen specificity.In the HLA-B40 group,6 alleles were detected out,which belonged to two kinds of antigen specificity.Conclusion The antigen polymorphism of HLA-B15 and HLA-B40 groups among Han population in Guangxi area is close to that in southern Chinese Han populations,but which still keeps its characteristics of Guangxi area.

BACKGROUND:Some studies have showed that the accuracy and surgery outcome of the percutaneous pedicle screw implantation was superior to open surgery, but the relationship between the angle of pedicle screws and screw stability is stil unclear in previous studies. OBJECTIVE:To investigate the effect of different angles of implanted screws on the stability of pedicle screw. METHODS:A total of 30 vertebral specimens of adult pigs were selected and screws were implanted respectively according to different coronal and sagittal angles. The maximum pul-out strength of screws from each specimen was tested by machine. Load-displacement curves were drew and statistical y analyzed. RESULTS AND CONCLUSION:The maximum pul-out strength and maximum energy of screw with 10° and 15° coronal and sagittal angles implantation were significantly better than those of 0° angle group (P<0.05). When the stress exceeded the maximum pul-out strength, the pul-out strength of screw decreased gradual y. The curves in coronal and sagittal 10° and 15° angle groups was similar, and the slope was better than 0° angle group (P<0.05). These results confirm that the angle of the implanted screw provides effective assistance to the stability of percutaneous pedicle screw. After the looseness of the screws, the pul out strength shows a steady downward trend.

Objective To explore the relationship uPAR in tissue and plasma of patients with cervical carcinoma and its clinical pathophysiological characteristics. Methods The preoperative plasma cancer tissue and its adjacent tissue in 42 cases of patient with ⅠB～ⅡA cervical carcinoma and the preoperative plasma and postoperative cervical tissue in 30 cases of patient with hysteromyoma were collected. Their uPAR were detected by ELISA. Results uPAR in the plasma of patients with cervical carcinoma was significantly higher than those in healthy controls and in patients with hysteromyoma. It was related to tumor invasive depth and lymph node metastasis and not related to tumor differentiation, uPAR in cancer tissue of patients with cervical carcinoma was significantly higher than those in normal cervical tissue. It was related to tumor differentiation and not to tumor invasive depth and lymph node metastasis. Conclusion uPAR in the plasma of patients with cervical carcinoma is related to invasion and metastasis, uPAR in the tissue is related to tumor differentiation.

Objective To investigate the ambiguity results distribution of HLA-A,B and DRB1 gene sequence-base typing in Guangxi population and to propose the way to resolve.Methods HLA-A,B and DRB1 genes of 1 000 donors in the Guangxi branch bank of China'bone marrow bank were genotyped by PCR-SBT,and then the ambiguity results distribution of the three loci was analyzed.The typing ambiguities resultswere resolved by high-resolution polymerase chain reaction-sequence-specific primers(PCR-SSP) and group specific sequencing primer(GSSP) methods,respectively.Results Among 1 000 samples,at least 1 locus in HLA-A,B and DRB1 genes in 96.7％ samples appeared the ambiguity results,in which the proportions of HLA-A,B and DRB1 loci appearing ambiguity results were 65.7 ％,58.8 ％ and 77.2 ％ respectively.For the samples of detected ambiguity results,single using the GSSP method could resolve the ambiguity typing results of 87.37％ HLA-A,93.54％ HLA-B and 60.49％ HLA-DRB1,using high-resolution PCR-SSP could resolve the ambiguity typing results of 12.63 ％ HLA-A,4.76 ％ HLA-B and 15.29 ％ HLA-DRB1,and the rest 1.70 ％ HLA-B and 24.22 ％ HLA-DRB1 ambiguity results were resolved by both GSSP and high-resolution PCR-SSPs method.Conclusion GSSP and high-resolution PCR-SSPs methods have high abilities to solve HLA ambiguity results both locate inside and outside the sequencing region,respectively.GSSP and high-resolution PCR-SSPs methods are supplement for each other,which can effectively resolve the problem of ambiguity results in high resolution HLA typing.

Objective To analyze the correlation between the levels of urinary ptasminogen activator receptor (uPAR) and the clinicopathological characteristics of patients with cervical carcinoma and it's clinical significance. Methods SABC immunohistochemistry was employed to detect the expression of uPAR in 50 cases of cervical carcinoma tissue and 50 cases of normal cervical tissue. ELISA method was used to determine the serum uPAR levels for the patients with cervical carcinoma. Results There was no expressionfor uPAR in normal tissues, The positive expression rate of uPAR was 66 % (33/50). The uPAR level of cervix cancer tissues [(70.92±28.55) ng/100 mg protein]was significantly higher than those in normal tissues [(11.01±5.40) ng/100 mg protein], (P ＜0.001). and uPAR levels were closely related to clinical stages,lymphatic metastasis and differentiation degree (P ＜0.05), but not related to deep myometrial invasion and vascular embolization (P ＞0.05) (however, they were not related to patient's age, tumor growth type and the size of tumor. Significant difference of uPAR level was observed between the patients with cervical carcinoma [(2.38±0.29) ng/ml]and in healthy controls [(0.50±0.16) ng/ml](P ＜0.001). Single factor analysis indicated that, before the treatment, the serum uPAR levels were closely related to clinical stages, lymphatic metastasis, vascular embolization, and deep myometrial invasion (P ＜0.05-P ＜0.01). However, they were not related to differentiation degree (P ＞0.05). Multifactor regression analysis showed that the pretreatment serum uPAR levels of patients were related to clinical stages (P =0.000), cavum pelvis lymphatic metastasis (P =0.000) and deep myometrial invasion. Patients with cervical carcinoma showed a dramatic drop in serum uPAR levels after treatment, which were significantly different compared to their pretreatment uPAR levels (P ＜0.001). Linear correlation analysis showed that there was a positive correlation between serum and tissue uPAR levels, (r =0.801, P ＜0.001). Conclusion There were high expression of uPAR in serum and tissues with cervical carcinoma. Pretreatment serum uPAR levels were closely related to patients' clinical stages,cavum pelvis lymphatic metastasis and deep myometrial invasion, serum uPAR levels may be an important tmnor marker for the diagnosis, detection, prognosis of cervical carcinoma.

OBJECTIVETo report on a novel human leukocyte antigen (HLA) allele.

METHODSPolymerase chain reaction-sequence based typing was used for routine HLA typing. For one sample, the result of B locus typing showed mismatch of one base with B*46:01:01, B*15:25:01 at locus 384. The group specific sequencing primers, which target at B*46 and B*15, were used to confirm the difference between the novel allele and the highest homologous allele.

RESULTSThe sequencing results showed that the highest homologous allele to the novel allele was B*46:01:01. The two sequences only differed for position 384 within the exon 3 (384G>T), which resulted in a codon change (GGG>GGT), though the amino acid sequence of the novel allele at position 104 was still Glycine (G). Investigation of the family showed that the novel allele was inherited from the father.

CONCLUSIONThe novel HLA-B allele, discovered in ethnic Zhuangs from Guangxi, has been designated as HLA-B *46:01:18 by the World Health Organization (WHO) HLA Nomenclature Committee.

Adult ; Alleles ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; China ; Exons ; Female ; HLA-B Antigens ; genetics ; Humans ; Male ; Molecular Sequence Data ; Young Adult

Bicyclol is a synthetic drug for hepatoprotection in clinic since 2004. Preliminary clinical observations suggest that bicyclol might be active against hepatitis C virus (HCV) with unknown mechanism. Here, we showed that bicyclol significantly inhibited HCV replication and in hepatitis C patients. Using bicyclol as a probe, we identified glycolipid transfer protein (GLTP) to be a novel restrictive factor for HCV replication. The GLTP preferentially bound host vesicle-associated membrane protein-associated protein-A (VAP-A) in competition with the HCV NS5A, causing an interruption of the complex formation between VAP-A and HCV NS5A. As the formation of VAP-A/NS5A complex is essential for viral RNA replication, up-regulation of GLTP by bicyclol reduced the level of VAP-A/NS5A complex and thus inhibited HCV replication. Bicyclol also exhibited an inhibition on HCV variants resistant to direct-acting antiviral agents (DAAs) with an efficacy identical to that on wild type HCV. In combination with bicyclol, DAAs inhibited HCV replication in a synergistic fashion. GLTP appears to be a newly discovered host restrictive factor for HCV replication, Up-regulation of GLTP causes spontaneous restriction of HCV replication.

[This corrects the article DOI: 10.1016/j.apsb.2019.01.013.].