Clinical observation of optical coherence tomography angiography in the macular vascular density after repair of retinal detachment / 眼科新进展

Objective To investigate the macular vascular density after successful repair of rhegmatogenous retinal detachment (RRD) for one year using optical coherence tomography angiography (OCTA),and discuss the correlation between the macular vascular density and visual acuity.Methods Totally 42 patients of the RRD (42 eyes),their contralateral eyes (A group) and 42 patients of the normal eyes (B group) were recruited into this study.All participants underwent examination with best corrected visual acuity (BCVA) and OCTA.The difference in macular vascular density was compared and the correlation between BCVA and the vascular density was analyzed.Results The macular vascular density of superficial layer,deep layer and choroidal capillary layer was 0.422 4 ±0.089 3,0.4836 ±0.0748,0.527 1 ±0.039 0 in RRD group,respectively,0.469 3 ±0.112 5,0.550 0 ±0.074 0,0.546 2 ±0.034 3 in A group,respectively,0.5619 ±0.053 7,0.611 2 ±0.035 2,0.562 6 ±0.030 4 in B group,respectively.The macular vascular density was significantly decreased in RRD group when compared with A and B groups (all P ＜ 0.05).There was a positive correlation between BCVA and the macular vascular density in the deep layer and choroidal capillaries layer (r =0.629,0.654,both P =0.000).However,there's no correlation between the macular vascular density of superficial layer and BCVA (P =0.103).Conclusion All the macular vascular densities are decreased in patients of RRD after successful repair of retinal detachment one year later,which indicated that the blood flow does not completely recover.And there is a positive correlation between BCVA and macular vascular densities in deep layer and choroidal capillaries layer.And meanwhile,OCTA can objectively and effectively quantify the status of macular region blood flow.

Association between CHRNA3 rs1051730 genotype and lung cancer risk in Chinese Han population: a case-control study / 华中科技大学学报（医学）（英德文版）

Recent population-based genome wide association studies have revealed potential susceptibility loci of lung cancer at the region of chromosome 15q25.1 containing nicotinic acetylcholine receptor genes. The loci increasing lung cancer risk has been widely identified in Caucasians, but whether this association also exists in Asians and whether this association is a direct role or mediated via tobacco smoking indirectly has not been fully established. We conducted a case-control study comprising of 210 histologically confirmed lung cancer cases and 200 healthy controls to examine rs1051730 genotyping, a single nucleotide polymorphism receiving much attention recently, and its influence on lung cancer risk as well as nicotine dependence in a Chinese Han population. Our results showed that the heterozygous C/T genotype and minor allele T conferred a significant higher risk of lung cancer than the CC homozygotes and allele C (adjusted OR=2.25, 95% CI=1.04-4.89, P=0.040 and OR=2.18, 95% CI=1.02-4.67, P=0.045 respectively). However, no association between the smoking habit and the CHRNA3 rs1051730 polymorphism was observed in this study. The results suggested that the rs1051730 polymorphism may modify susceptibility to lung cancer via a smoking-independent manner among Chinese Han population. Additional studies in vitro and in vivo are warranted to further elucidate the impact of rs1051730 on lung cancer susceptibility.

Association between CHRNA3 rs1051730 genotype and lung cancer risk in Chinese Han population: A case-control study / 华中科技大学学报（医学）（英德文版）

Recent population-based genome wide association studies have revealed potential susceptibility loci of lung cancer at the region of chromosome 15q25.1 containing nicotinic acetylcholine receptor genes. The loci increasing lung cancer risk has been widely identified in Caucasians, but whether this association also exists in Asians and whether this association is a direct role or mediated via tobacco smoking indirectly has not been fully established. We conducted a case-control study comprising of 210 histologically confirmed lung cancer cases and 200 healthy controls to examine rs1051730 genotyping, a single nucleotide polymorphism receiving much attention recently, and its influence on lung cancer risk as well as nicotine dependence in a Chinese Han population. Our results showed that the heterozygous C/T genotype and minor allele T conferred a significant higher risk of lung cancer than the CC homozygotes and allele C (adjusted OR=2.25, 95% CI=1.04-4.89, P=0.040 and OR=2.18, 95% CI=1.02-4.67, P=0.045 respectively). However, no association between the smoking habit and the CHRNA3 rs1051730 polymorphism was observed in this study. The results suggested that the rs1051730 polymorphism may modify susceptibility to lung cancer via a smoking-independent manner among Chinese Han population. Additional studies in vitro and in vivo are warranted to further elucidate the impact of rs1051730 on lung cancer susceptibility.

Growth of breast cancer cells is inhibited in vitro by cyclin E-siRNA / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the changes of biological characteristics of breast cancer cell line by cyclin E expression.</p><p><b>METHODS</b>Human breast cancer cell line MCF-7 was transfected with cyclin E siRNA vector pEGFP/CCNE2. siRNA-induced silencing of cyclin E was determined by RT-PCR at RNA level and Western blot at protein level. The proliferation of MCF-7 cells and their sensitivity to chemotherapy was measured by CCK-8 assay. The cells were examined by FCM. The cell line was injected into nude mice and the tumor size was measured.</p><p><b>RESULTS</b>The expression of cyclin E was inhibited in the MCF-7 cells. The relative expression level of cyclin E mRNA was 0.23 +/- 0.05, and that of cyclin E protein was 0.24 +/- 0.05. The cell growth was inhibited by 68.56% +/- 0.08%, and their sensitivity to chemotherapy was increased. Most cells were blocked at G(1) (77.38%), their tumorigenic ability in nude mice was reduced, and the size of tumor formed in mice of the experimental group was decreased than that of controls.</p><p><b>CONCLUSION</b>Inhibition of cyclin E expression in breast cancer cells can block their cell cycle at G(1) phase, reduce their cell growth, differentiation and proliferation, and increase their sensitivity to chemotherapy.</p>

Establishment of an I-SceI system and its application to introduce DNA double-strand break into human hepatoma cell line HepG2 / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To construct a system of I-SceI and induce a site-specific DNA double-strand break (DSB) in the genome of HepG2 for using this system in future exploration of the potential mechanisms of HBV integration by DSB repair.</p><p><b>METHODS</b>The eukaryotic expression plasmid pEGFP2 was constructed and transfected into human hepatoma cell line HepG2. The positive neomycin-resistant transfected cell clones were generated by G418 selection. Then the positive cells containing an 18-bp I-SceI endonuclease site were transfected transiently with pCMV(3NLS) I-SceI, an I-SceI expression plasmid. At 24 h post-transfection with pCMV (3NLS) I-SceI, gamma-H2AX, as an early cellular marker of DSB, was detected using immunocytochemistry and Western blot analysis.</p><p><b>RESULTS</b>Restriction analysis and DNA sequencing verified that the plasmid pEGFP2 was successfully constructed. gamma-H2AX increased significantly in cells transfected with the I-SceI system.</p><p><b>CONCLUSIONS</b>Genomic DSB can be induced into HepG2 by introducing an I-SceI system. The cell model could provide us with a practical tool for further study to see if DSB is a potential target for HBV integration.</p>

Development and clinical application of male human papillomavirus genotyping by membrane DNA chip / 中华男科学杂志

<p><b>OBJECTIVE</b>To develop a new method for the detection of male human papillomavirus (HPV) genotypes and to investigate its clinical application value.</p><p><b>METHODS</b>With computer assistance and based on the classical common primers MY09/11, modified PGMY09/11 with 23 HPV subtypes for PCR and Genbank data on HPV, we designed probes for the simultaneous detection of 18 high-risk subtypes (HPV-16, 18, 31, 33, 35, 39, 45, 51, 52, 53, 56, 58, 59, 66, 68, 73, 83 and MM4) and 5 low-risk subtypes (HPV-6, 11, 42, 43 and 44) and fixed them to the special membrane to make a DNA chip. A total of 112 male urethral samples were collected with swabs and studied for the clinical value. Meanwhile the single subtypes of HPV positive were sequenced and the standard samples detected for their sensitivity.</p><p><b>RESULTS</b>Of the total number, 25 samples were found to be HPV positive, 13 single HPV infection and 12 multiple infection. Nine HPV gene subtypes were noted in the samples: 6, 11, 16, 18, 33, 35, 43, 56 and 73, with sensitivity up to 10 copies of HPV DNA.</p><p><b>CONCLUSION</b>Human papillomavirus genotyping by the membrane DNA chip is applicable to the diagnosis of male HPV infection as well as to the related epidemic and etiological investigation.</p>