Spectrum of thalassemia mutations in fetuses of Han and Li ethinicities in Hainan province, China

To analyze the frequency and spectrum of thalassemia mutations in amniotic fluid samples collected from Han and Li people in Hainan province of China. Methods: We carried out a retrospective analysis on prenatal diagnosis of amniotic fluid samples collected from pregnant women who may have next generation with high risks of medium or severe thalassemia between 2005 and 2016. Diverse fetal thalassemia genotypes and mutated alleles in Han and Li people were analyzed and cmpared. Results: We examined 536 amniotic fluid samples from Han people and 588 from Li people, among which 406 Han and 500 Li samples were found to carry at least one thalassemia gene mutation, with a detection rate of 75.75% and 85.03%, respectively. Among all - and β-thalassemia mutant alleles detected, the most frequently found mutations in Han and Li samples were SEA-type of -thalassemia and 41/42 (-CTTT) of β-thalassemia, respectively. A total of 75 severe thalassemia cases were identified in Han samples and 53 in Li samples. In most of these severe cases, parents chose to terminate pregnancy after being informed of thalassemia-related risks. Conclusions: The thalassemia mutations shows ethnic and area specificity, and that prenatal diagnosis for high-risk thalassemia carrier pregnant women is an efficient approach to prevent and control the occurrence of severe thalassemia in the high-prevalence areas.

Human survivin modified DCs vaccine inhibits laryngeal cancer in vivo and in vitro / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>Construction of human full-length survivin gene-modified DCs vaccine and observe the biological characteristics and the role of laryngeal cancer treatment.</p><p><b>METHODS</b>Construction of homologous recombination through the full-length survivin-human adenovirus (pAd-sur), and transfection of immature DCs, induced by access to sophisticated cultivate DCs, the proliferation of activated T lymphocytes; DCs vaccine different groups observed in vitro, in vivo biological activity.</p><p><b>RESULTS</b>The success in bringing human to build a full-length survivin gene recombinant adenovirus vector pAd-sur; get with the typical characteristics of DCs, the expression level of the surface molecules of up to CD1a 46.2%, CD80 64.2%, CD83 80.5%, HLA-DR 84.3%, vaccine for in vitro cell killing rate 51.5%, compared with the control group, the difference was significant (t = 7.1358, P < 0.01). Gene-modified tumor cell vaccine group was 54.9% of apoptosis and necrosis rate of 21.9%, compared with the control group, the difference was significant (t value was 33.0209 and 17.5057, all P < 0.01).</p><p><b>CONCLUSION</b>Human full-length survivin gene modified, DCs The expression of surface molecules than the rate of gene-modified DCs without a significant increase, with more to stimulate T lymphocyte proliferation, and promote secretion of gamma-IFN; in vivo, in vitro to promote the ability of anti-laryngeal cancer cells.</p>

Molecular characterization of hantavirus Zhejiang isolate ZT10 strain from M. fartis / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To learn about the complete genomic sequence of the Seoul virus strain ZT10 isolated from M. fartis.</p><p><b>METHODS</b>The total RNA was extracted from the infected Vero E6 cells and amplified by RT-PCR. The purified PCR products were cloned into T-vector and sequenced.</p><p><b>RESULTS</b>The results demonstrated that the complete genome of ZT10 was comprised of L(6530), M(3651) and S(1753) segments which encoded 2151-1133 and 429 amino acids respectively.</p><p><b>CONCLUSION</b>Analysis of sequence revealed that the ZT10 belonged to Seoul virus. The nucleotide sequence identity of the M gene with Seoul virus was 84.0%-96.3%. The identity with Hantan vrisu (Prospect Hill virus, Tula virus) isolated from M. fartis was 57.5%-60.9%. The sequence identity of the S gene with Seoul virus was 87.9%-96.0% at nucleotide level and 96.9%-97.9% at amino acid level.</p>

A case control study on the risk factors of male infertility / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the risk factors of male infertility.</p><p><b>METHOD</b>Case control study including 94 cases and control group with a ratio of 1 to 1.</p><p><b>RESULTS</b>The risk factors of male infertility were long time heavy smoking habit (OR = 3.45, 95% CI: 1.95 - 6.10), illegal sexual intercourse (OR = 7.29, 95% CI: 2.54 - 20.89), growing vegetable under plastic in higher temperature (OR = 6.73, 95% CI: 1.91 - 23.69), contact with benzene chemicals (OR = 20.53, 95% CI: 4.67 - 90.25) and having Ureaplasma urealyticum (Uu) infection (OR = 5.55, 95% CI: 2.28 - 13.53).</p><p><b>CONCLUSION</b>Male infertility was resulted from many factors repeatedly acting on men for long time. In order to prevent male infertility, issues as environmental pollution, occupational protection need to be improved while bad working condition and risky behavior should be changed.</p>