To explore the relationship between the activity of polyol pathway and diabetic microangiopathy, the level of red blood cell sorbitol(RBCS)in 106 patients with NIDDMwas determined. The results indicated that the level of RBCS in diabetic patients was significantly increased, and was positively correlated with 24-h urinary albumin excretion rate(UAER)and the degree of diabetic retinopathy(DR). Besides,the value of RBCS in patients with both pro-teinuris and DR or proteinuria was markedly higher as compared with that in patients with either proteinuria or DR,and the concentration of RBCS in the patients with DR of proteinuria was also significantly higher than those wth neither proteinuria nor DR. In addition.it was also found that the value of RBCS gradually elevated with the aggravation of UAERand DR. These findings suggest that the elevation of RBCS level plays an important role in the formation and development of diabetic microangiopathy.

Objective To construct plvx-cyclooxygenase-2(COX-2)-DsRed and establish breast cancer cell line MCF7 which overexpressed COX-2, to explore the effect of COX-2 on breast cancer cell.Methods The full-length COX-2 PCR product was obtained by total COX-2 PCR primers and COX-2 cDNA vector.After the PCR product and lentiviral vector plvx-DsRed-Monomer-N1 were cut simultaneously by restriction enzyme BamH1 and Xholl, they were connected and sequenced, to get lentiviral vector plvx-COX-2-DsRed.After selected by puromycin, overexpressed COX-2 breast cancer cell line MCF7-plvx-COX-2-DsRed was obtained.The stable cell line was verified by real time PCR and Western blot.The differences of proliferation ability between stable cell line and normal one were compared by colony formation test and Western blot.Results The lentiviral vector plvx-COX-2-DsRed and stable cell line MCF7-plvx-COX-2-DsRed after selecting were obtained.COX-2 expression level of the stable cell line was 75.29 times as high as that of MCF7, and 64.91 times as high as that of cell line MCF7-plvx-DsRed-Monomer-N1 by PCR assay (P ＜ 0.05), which was consistent with the results of Western blot and microscope photo.MTT results showed that cell line MCF7-plvx-COX-2-DsRed had grown faster than cell line MCF7 and MCF7-plvx-DsRed-Monomer-N1 from the 2nd day (P ＜ 0.05), which was accordant with colony formation assay.MCF7-plvx-COX-2-DsRed cell line had higher c-myc expression and lower β-catenin expression than MCF7 cell and cell line MCF7-plvx-DsRed-Monomer-N1 detected by Western blot relative quantification (P ＜ 0.05).Conclusion The plvx-COX-2-DsRed lentiviral vector and cell line MCF7-plvx-COX-2-DsRed are successfully constructed.COX-2 can increase proliferation of MCF7 cells through up-regulating the expression of c-myc.

In the process of preparing and analyzing the metabonomics samples, there are lots of influential factors such as sample individual differences, environmental factors and human factors. Here we report a study on 3 healthy male SD rats of different samples carried out by different operators (n=4). It was a two-way experiment designed to explore the impact factors and lay the foundation for future experiments. The cluster analysis was employed in comparing 12 samples. The results showed that the differences of rats between the sample groups had a certain influence on the metabonomics data, and there was relatively little variability between the 4 operators. That is to say, whilst the sample are rather different from one another, a given sample is generally quite similar to itself in metabonomics study.
Animals ; Blood Chemical Analysis ; methods ; Cluster Analysis ; Humans ; Male ; Metabolomics ; methods ; Nuclear Magnetic Resonance, Biomolecular ; methods ; Rats ; Rats, Sprague-Dawley ; Reproducibility of Results

Objective To evaluate the role of spinal c?Jun N?terminal kinase ( JNK ) signaling pathway in incisional pain in rats. Methods Sixty?three adult male Sprague?Dawley rats, weighing 200-250 g, were randomly divided into 3 groups ( n=21 each) using a random number table: incisional pain group ( IP group) , dimethyl sulfoxide ( DMSO) group, and JNK inhibitor SP600125 group ( SP group) . A 1?cm longitudinal incision was made through skin, fascia and muscle of the plantar aspect of the hindpaw in anesthetized rats. In group DMSO, 10% DMSO 10 μl was injected intrathecally at 30 min before surgery. In group SP, SP600125 25 μg (in 10 μl of 10% DMSO) was injected intrathecally at 30 min before sur?gery. Six rats in each group were sacrificed, and the mechanical paw withdrawal threshold ( MWT) and thermal paw withdrawal latency ( TWL) were measured at 24 h before establishment of the model and 2, 6, 24, 48 and 72 h after establishment of the model. After measurement of the pain threshold at 24 h before establishment of the model and 6, 24, 48 and 72 h after establishment of the model, the lumbar segment of the spinal cord was removed for determination of the expression of phosphorylated JNK ( p?JNK) by im?munofluorescence. Results The MWT was significantly lower, the TWL was shorter, and the expression of p?JNK was lower at each time point after establishment of the model than at 24 h before establishment of the model in group IP (P<0?05). Compared with group IP, the MWT was significantly increased, the TWL was prolonged, and the expression of p?JNK was down?regulated at each time point after establishment of the model in group SP ( P<0?05) , and no significant change was found in the parameters mentioned a?bove in group DMSO ( P>0?05) . Conclusion Spinal JNK signaling pathway is involved in the develop?ment and maintenance of incisional pain in rats.

Objective To characterize the whole-sequence of plasmid pB557-NDM isolate from Enterbacter cloacae and elaborate its antibiotic-resistant mechanisms .Methods Antibiotic resistance genes were determined by PCR , followed by amplicon sequencing .The activity of class A/B/D carbapenemases was determined by modified Carba NP test .Conjugation experiments were performed to verify the transferability of plasmid pB 557-NDM.The minimum inhibitory concentration (MIC) values of bacterial strains were tested using VITEK 2.The genetic structure, mobile elements and antibiotic-resistant mechanisms of transferable plasmid pB 557-NDM were determined by a whole genome sequencing method .Results The modified CarbaNP test showed that B557 and B557-EC600 had class B carbapenemase activity , and that the blaNDM was carried by plasmid pB557-NDM.This plasmid could be transferred into E.coli through conjugation experiments and therefore could confer corresponding antibiotic resistances to the transconjugant B 557-EC600.Plasmid pB557-NDM was an IncA/C2 plasmid, whose total length was 141.65 kb, and the GenBank accession number was KX786648.It had two inserted regions.One was the blaCMY-6 region where the blaCMY gene was carried by a transposition unit IS Ecp1-blaCMY , the other was the blaNDM-1 region which consisted of a ΔTn1696-In46-rmtC-ISKpn14-ΔTn125 complex structure.Conclusion The production of plasmid pB557-NDM in strain B557 contributes most to its high resistance to many antibiotics .The blaNDM-1 gene is carried in a trancated transposition ΔTn125.

The main mineral component of natural tooth was determined as calcium apatite many years ago; most of them exist in the form of hydroxyapatite with different crystallites. If a tooth decayed, the crystalline of hydroxyapatite would be changed and decomposed. In our experiment, a natural tooth with caries was measured by high resolution XRD equipment: X'pert Pro. Three spots which included normal enamel, normal dentin and caries tissue were analyzed. The results showed that tooth was a kind of biological mixed crystal composed of many crystal phases, the main crystal phase was hydroxyapatite. From normal enamel to normal dentin and to caries tissue, the length of the a-axis of hydroxyapatite crystallite increased, the length of the c-axis of hydroxyapatite crystallite remained unchanged. The crystal sizes were: normal enamel D002 = 27.600 nm; normal dentin D002 = 16.561 nm; caries tissue D002 = 13.163 nm. Crystallinity: normal enamel>normal dentin>caries tissue. According to our experiment, tooth could be conveniently studied by high resolution microdiffracion XRD equipment.
Dental Caries ; metabolism ; Dental Enamel ; chemistry ; Dentin ; chemistry ; Humans ; Tooth ; chemistry ; X-Ray Diffraction ; methods

To assess the influence of different sampling methods on Human Amniotic Fluid (HAF) during metabonomics analysis, and to establish a metabolite profile database for normal human amniotic fluid, four experimental groups (the group of freeze-drying, of freeze-thawing, of storage at -20 degrees C, and of keeping in room temperature) and a control group were investigated by use of 1H-NMR spectroscopy, respectively; the data of H-NMR spectroscopy was treated by principal components analysis (PCA). The results showed that, by comparison with the control, there were distinct differences in the experimental groups except the group of storage at -20 degrees C. Therefore, It is possible to use 1H-NMR-based metabonomics technique for analysis of HAF; moreover, during the tests, careful treatments of HAF should be institued to minimize the influence on the samples.
Amniotic Fluid ; metabolism ; Female ; Humans ; Magnetic Resonance Spectroscopy ; methods ; Metabolome ; Metabolomics ; methods ; Pregnancy ; Principal Component Analysis ; Specimen Handling ; methods ; standards

Metabonomics approach is a science that systematically studies the regularity of changes of metabolites and reveals the nature of metabolic activities of the lives in the dynamic process of metabolism. In this study, pregnant C57BL/6J mice were randomly divided into two groups with 15 mice in each. The ones in the experimental group were intraperitoneally injected with Dexamethasone and the others in the control group with isotonic Na chloride from 10th to 12th day of gestational period. On 17.5th day, all the mice were executed. The livers were extracted and prepared into aqueous soluble liver tissue extracts. The technology of nuclear magnetic resonance (NMR) was used to detect the endogenous small molecule metabolites. Finally, through the method of principal component analysis (PCA), changes of metabolites ingredients could be determined. The experimental results showed that there was significant difference in PCA scores plot between the two groups. Furthermore, the difference was in line with that of incidence of cleft palate in the embryos between the two groups. Therefore, metabonomics results can be used to reflect the changes of metabolites group interfered by Dexamethasone in the course of pregnancy of C57BL/6J mice and this method opens up a new way for further study of pathogenic mechanism of cleft lip with or without palate.
Abnormalities, Drug-Induced ; etiology ; metabolism ; Animals ; Cleft Palate ; chemically induced ; Dexamethasone ; toxicity ; Embryo, Mammalian ; Female ; Magnetic Resonance Spectroscopy ; methods ; Metabolomics ; Mice ; Mice, Inbred C57BL ; Pregnancy

Objective To explore the cognition ,attitude and intention of seeking doctor on hierarchical diagnosis and treat-ment among the patients suffering from chronic diseases in Chongqing City .Methods A multistage stratified sampling method was adopted to investigate 1125 patients with chronic diseases extracted from 9 public hospitals as well as basic medical and health in-stitutions in 9 districts and counties of Chongqing City .Meanwhile ,the differences of intentions of seeking doctor and cognition situ-ation of hierarchical diagnosis and treatment were analyzed .Results The patients with chronic diseases in basic medical and health institutions were more likely to choose the basic medical and health institutions for seeking doctor than the patients treated in public hospitals ,the difference was statistically significant (χ2 = 190 .051 ,P<0 .01);31 .2% of the patients with chronic diseases never contacted the hierarchical diagnosis and treatment .The technical capabilities of basic medical and health institutions meeting treat-ment needs ,gradual improvement of medical condition and service level and trending to seeking doctor in basic medical and health institutions had statistical difference between the patients in public hospitals and patients in basic medical and health institutions (P<0 .01) .The aspects of understanding the current referral system between medical institutions and downward referral conducing the disease to obtain continuous long tern treatment had statistical difference between the patients in public hospitals and patients in basic medical and health institutions (P< 0 .01) .Conclusion In order to better carry out hierarchical diagnosis and treatment in Chongqing City ,it is necessary to perfect the supporting polices of hierarchical diagnosis and treatment for guiding the primary diag-nosis in the patients with chronic disease ,meanwhile establish an efficient dual referral mechanism and enlarge the propaganda of hi-erarchical diagnosis and treatment policy .

Objective:To analyze the clinical and radiological features of patients with hypoplasia of the internal carotid artery.Methods:Four patients with hypoplasia of the internal carotid artery (including 3 patients with congenital absence of the internal carotid artery), admitted to our hospital from January 2010 to December 2021, were chosen in our study. The clinical data and imaging features of these patients were retrospectively analyzed.Results:The age of these patients ranged from 31 to 73 years, and two patients were female. Clinically,2 patients presented with dizziness, 1 patient presented with limb weakness, and 1 patient was asymptomatic. In 3 patients with congenital absence of the internal carotid artery, DSA results showed that the internal carotid artery was not developed, and CT bone window showed that the internal carotid artery canal was absent; 1 patient with hypoplasia of the internal carotid artery showed thin imaging in DSA results. One patient was combined with anterior communicating artery aneurysm and left internal carotid artery aneurysm. One patient was with vertebral arterial dolichoectasia. The collateral circulation compensation: type A was noted in 3 patients and type C was noted in 1 patient.Conclusion:The patients with hypoplasia of the internal carotid artery are usually asymptomatic, and patients with congenital absence of the internal carotid artery can have ischemic symptom; these patients can be complicated with vascular abnormalities such as aneurysm and vascular thickening.