Influence of high glucose on PRKAA1 expression and proliferation of trophoblast cells / 上海交通大学学报（医学版）

Objective·To explore the expression level of protein kinase AMP-activated catalytic subunit α1 (PRKAA1) in placental tissues of gestational diabetes mellitus(GDM)women,and the influence of high glucose(HG)on PRKAA1 expression and proliferation viability of trophoblast cells in vitro. Methods·The placental samples of GDM women (n=19) and normal pregnant women (n=20) of the corresponding period were collected. Real-time qPCR and Western blotting assay were used to detect the mRNA and protein levels of PRKAA1 in these biopsies, respectively. Trophoblast cells were treated by HG in vitro and then expression level of PRKAA1 was tested.CCK8 assay was used to detect proliferation viability of the cells treated by HG medium or inhibitor of PRKAA1, dorsomorphin. Results·Comparing to normal pregnant women, both mRNA and protein levels of PRKAA1 in placental tissues of GDM women significantly decreased (both P<0.05). HG treatment drastically downregulated expression of PRKAA1 in trophoblast cells in vitro(P<0.05).Both HG medium and dorsomorphin suppressed proliferation viability of trophoblast cells(both P<0.05). Conclusion·Expression level of PRKAA1 is dampened in placental tissues of GDM women.HG suppresses proliferation viability of trophoblast cells probably via downregulating PRKAA1 level in vitro.

Acute pancreatitis in pregnancy: a 6-year single center clinical experience / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The acute abdomen remains a challenge for all obstetricians and physicians who take part in the care of women in pregnancy. To add substantially to our understanding of acute pancreatitis (AP) in pregnancy, in particular affirming the increased risks for mother and fetus associated with AP, we explored features of clinical manifestation and the strategy of management of this disease during pregnancy, and its effects on maternal and fetal outcomes.</p><p><b>METHODS</b>A retrospective review of medical records of all pregnant patients diagnosed with AP admitted to the Department of Obstetrics and Gynecology, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University between 2005 and 2010 was performed. Information was collected from presentation, management, and outcome from medical records.</p><p><b>RESULTS</b>There were 11 cases in 2010, accounting for 44% of 25 cases. Among these cases, mild AP (MAP) occurred in 15 cases (60%), while the rest cases were severe AP (SAP) (40%). The major etiology of AP in pregnancy was due to gallstone and cholecystitis. Clinical features together with elevation of the plasma concentrations of pancreatic enzymes were the cornerstones of diagnosis. Positive conservative treatment was taken in most of the cases (21 cases, 84%) with a favorable outcome. Seven cases of critically ill patients were monitored in intensive care unit, and 4 patients underwent surgical interventions. As a result, all of 25 patients had better prognosis, no maternal death was observed. There were 8 preterm labors and 2 fetal losses, accounting for the perinatal mortality of 8%. Fetal malformation was not observed.</p><p><b>CONCLUSIONS</b>While a pregnant woman suffers acute abdominal pain, early diagnosis and severity assessment of AP are very important. Conservative comprehensive treatment with intensive care is recommended. Surgical intervention should be performed as late as possible.</p>

Molecular characterization of cotton leaf Curl Multan virus and its satellite DNA that infects Hibiscus rosa-sinensis / 病毒学报

Virus isolate G6 was obtained from Hibiscus rosa-sinensis showing yellow and leaf curl symptoms in Guangzhou, Guangdong Province. The complete nucleotide sequence of DNA-A was determined to be 2 737 nucleotides encoding six potential ORFs. Comparison showed that G6 DNA-A had more than 89% sequence identify with all isolates of Cotton leaf curl Multan virus (CLCuMV) and shared the highest sequence identify (96.1%) with CLCuMV isolate 62. G6 DNA-A had 87.1%-89.8% sequence identity with those of CLCuRV isolates, while less than 87% identities with other begomoviruses. Phylogenetic analysis of G6 DNA-A and selected begomoviruses showed that G6 was most closely related to CLCuMV isolates, and they clustered together as a separate branch. Satellite DNA molecule (G6 DNAbeta) was found to be associated with G6 using the primers beta01 and beta02. G6 DNAbeta contains 1346 nucleotides, with a potential functional ORF (C1) in complementary sense DNA. Pairwise comparison indicated that G6 DNAbeta had the highest sequence identities with CLCuMV DNAbeta (92.1%) and CLCuRV DNAbeta (88.7%), but less than 80% sequence identities with other reported satellite DNA molecules. Phylogenetic analysis indicated that G6 DNAbeta was most closely related to CLCuMV DNAbeta and the two DNAbetas clustered together as a separate branch, and formed the main branch with DNAbeta of CLCuRV and MYVV-Y47. It is concluded that G6 infecting Hibiscus rosa-sinensis is an isolate of CLCuMV.

Sequence Analysis of Segment 8 of Five Chinese Isolates of Rice Gall Dwarf Virus and Expression of a Main Outer Capsid Protein in Escherichia coli / 中国病毒学

The rice gall dwarf disease, caused by the Rice gall dwarf virus (RGDV) is a serious disease occurring in rice in many regions of Guangdong province. As a basis to control the disease we have studied the genomic diversity of a variety of isolates from different locations. Genome segment 8(S8), encoding a main outer capsid protein (Pns8) of RGDV five isolates (BL, CH, DQ, GZ, XY) from Guangdong province was cloned and sequenced. The results revealed that all the S8 segments of the five isolates consisted of 1 578 nucleotides and had a single open reading frame (ORF) extending for 1 301 nucleotides from nucleotide 21 which encoded a polypeptide of 426 amino acids with an estimated molecular weight of 47.4 kDa. The S8 full-length sequence and the ORF sequence shared 97.3%-98.8% and 97.3%-99.1% nucleotide sequence identities within the five Chinese isolates, and shared 94.8%-95.6% and 95.0%-96.0% identities with those of the Thailand isolate respectively. The deduced amino acid sequence of Pns8 in GZ isolate was identical to that in the Thailand isolate, while the amino acid sequence variability of Pns8 within five Chinese isolates ranged from 0.5% to 2.1%. These results indicate that the S8 segment of RGDV is highly conserved in different isolates from different locations. The S8 cDNA from the XY isolate was cloned into the plasmid vector pET-28b(+) and a fused expression protein with an apparent molecular mass of 51kDa was specifically detected in an analysis of Escherichia coli Rossetta(DE3)Ⅱcells. To our knowledge, this is the first report on analysis of the RGDV segment 8 sequence and genetic comparison of different RGDV isolates and their protein expression.