Effect of tetramethylpyrazine combined with cisplatin on VEGF, KLF4 and ADAMTS1 in Lewis lung cancer mice

OBJECTIVE@#To further explore the function of combine use of tetramethylpyrazine (TMP) and cisplatin (DDP) in lung carcinoma.@*METHODS@#We used the combination drug to treat Lewis lung cancer mice, investigated the expression level of vascular endothelial growth factor (VEGF), Kruppel-like factor 4 (KLF4) and A disintegrin and metalloproteinase with thrombospondin motifs 1 (ADAMTS1) and to further explore the inhibitory effects and potential mechanism of TMP combined with DDP on tumor angiogenesis.@*RESULTS@#The tumor growth was suppressed in TMP group, DDP group and TMP combined with DDP group. Furthermore, the weights and volume of tumor, the expression level of VEGF, KLF4 and ADAMTS1 were found significantly changed between experiment group and control group. These findings suggest that TMP with DDP had additional or synergistic effects to inhibit the tumor growth effectively, might be achieved through reducing the expression of angiogenesis promoting factor VEGF and increasing expression of angiogenesis inhibitors KLF4 and ADAMTS1.@*CONCLUSION@#KLF4 and ADAMTS1 may be synergically involved in the angiogenesis in mouse Lewis lung cancer through the different signal ways.

Effect of tetramethylpyrazine combined with cisplatin on VEGF, KLF4 and ADAMTS1 in Lewis lung cancer mice

Objective To further explore the function of combine use of tetramethylpyrazine (TMP) and cisplatin (DDP) in lung carcinoma. Methods We used the combination drug to treat Lewis lung cancer mice, investigated the expression level of vascular endothelial growth factor (VEGF), Kruppel-like factor 4 (KLF4) and A disintegrin and metalloproteinase with thrombospondin motifs 1 (ADAMTS1) and to further explore the inhibitory effects and potential mechanism of TMP combined with DDP on tumor angiogenesis. Results The tumor growth was suppressed in TMP group, DDP group and TMP combined with DDP group. Furthermore, the weights and volume of tumor, the expression level of VEGF, KLF4 and ADAMTS1 were found significantly changed between experiment group and control group. These findings suggest that TMP with DDP had additional or synergistic effects to inhibit the tumor growth effectively, might be achieved through reducing the expression of angiogenesis promoting factor VEGF and increasing expression of angiogenesis inhibitors KLF4 and ADAMTS1. Conclusion KLF4 and ADAMTS1 may be synergically involved in the angiogenesis in mouse Lewis lung cancer through the different signal ways.

Microsatellite DNA polymorphism of adrenomedullin gene and atherosclerotic cerebral infarction / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To detect the correlation between the microsatellite DNA polymorphism of adrenomedullin(ADM) gene (repeated sequences of CA) and the atherosclerotic cerebral infarction (ACI).</p><p><b>METHODS</b>With PCR, ADM genotype was monitored from 189 normotensive subjects and 283 cerebral infarction patients. By using radioimmunoassay, their plasma ADM concentration was measured, so as the biochemical index.</p><p><b>RESULTS</b>The genotype distribution of ADM between the health control and ACI groups was significantly different, chi square was 28.732, P < 0.05. As one of the four alleles, including 11, 13, 14 and 19 alleles, the frequency of 19 allele in ACI groups was much higher than that in the health control group, chi square was 26.929, P < 0.05. However, there was no significant difference in plasma ADM concentration among the different genotypes of the ACI patients.</p><p><b>CONCLUSION</b>Microsatellite DNA polymorphism of ADM gene may be associated with the genetic predisposition to ACI.</p>

Effect of adrenomedullin on neuron apoptosis, infarction volume and expression of Egr-1 mRNA after focal ischemia-reperfusion in rats / 神经科学通报·英文版

Objective To observe the influence of adrenomedullin (ADM) on neuron apoptosis, infarction volume of brain, and the expression of early growth response 1 (Egr-1) mRNA in ischemia-reperfusion rats. Methods The arteria cerebri media was tied for 2 h to construct the ischemia model. Infarction volume was detected by triphenltetrazolium chloride (TTC) staining, neuronal apoptosis and necrosis was detected with terminal deoxynucleotidyl transferase nick labeling (TUNEL) method, and the Egr-1 mRNA expression was examined by in situ hybridization (ISH). Results Infarction volume after ischemia-reperfusion is (269 +/- 20) mm(3). Infarction volume after injection of ADM through different ways are femoral vein (239 +/- 17) mm(3) (decreased by 11.2%), arteria carotis (214 +/- 14) mm(3) (by 20.4%) and lateral cerebral ventricle (209 +/- 13) mm(3) (by 22.3%), respectively. The results indicate that injecting ADM through arteria carotis and lateral cerebral ventricle is much more effective than it through femoral vein (P < 0.05). The TUNEL-positive cells in cerebral cortex or hippocampus are few in the sham operation group, but much more in the ischemia-reperfusion group. After being supplied with ADM, especially through arteria carotis interna or lateral cerebral ventricle way, the TUNEL-positive cells decreased obviously. Expression of Egr-1 mRNA was low in the cerebral cortex of the sham operation group rats, enhanced in the ischemia and reperfusion group rats, and enhanced markedly after treatment with ADM, especially through arteria carotis interna or lateral cerebral ventricle way (P < 0.01). Conclusion Injection of ADM through different ways could alleviate neural dysfunction, decrease neuron apoptosis and brain infarction volume, and increase the expression of Egr-1 mRNA.

The Isolation and Phylogenetic Analysis of Facultative Anaerobic Cellulase-producing Strain / 微生物学通报

A bacillus strain was isolated from the dejecta of the Giant Panda " Xiangxiang" returned to wild, afforded by China Giant Panda Protection and Research Center, Wolong Sichuan. By primary research, the strain was identified as Serratia and called as Serratia JF-1116. The 16S rDNA gene of the bacteria strain, was amplified , cloned and sequenced. BLAST of the sequence in GenBank indicated that the species with close similarity to JF-1116 were from genus Enterobacter only. The phylogenetic tree was producted from 16S rDNA of JF-1116 and other 18 Enterobacter species with the high similarity. JF-1116 was clustered with 3 strains of Serratia.