AIM:To investigate the regulatory role of hypoxia mimic reagent cobalt chloride ( CoCl2 ) on cave-olin-1 (Cav-1) generation and the influence of Cav-1 on the abilities of migration and invasion of human lung adenocarcino-ma A549 cells.METHODS:The concentrations of Cav-1 and hypoxia-inducible factor ( HIF)-1αin pleural effusion of the patients with lung cancer ( MPE) or tuberculous pleurisy ( TBPE) were detected, and the correlation was also compared. A549 cells were treated with CoCl2 at different concentrations and time in the presence or absence of HIF-1αinhibitor YC-1.The concentrations of Cav-1 and HIF-1αin the cell supernatants were measured by ELISA.The effects of Cav-1 induced by CoCl2 on the migration and invasion of A549 cells were determined by scratch test and Transwell invasion trial, respec-tively.RESULTS:The levels of Cav-1 and HIF-1αin MPE were significantly higher than those in TBPE.There was a highly positive correlation between Cav-1 and HIF-1αlevels in the pleural effusion.CoCl2 induced the generation of Cav-1 and HIF-1αin A549 cells in a concentration-and time-dependent manner, the peak occurred at 200 μmol/L or 24 h, while the concentration over 200 μmol/L or after treated over 24 h, a concentration-or time-dependent inhibition was ob-served.HIF-1αinhibitor YC-1 concentration-dependently inhibited the generation of HIF-1αand Cav-1 induced by CoCl2 in A549 cells.CoCl2 enhanced A549 cells migration and invasion, with 200 μmol/L played the strongest role, which were down-regulated significantly in the presence of YC-1.CONCLUSION:The alteration of hypoxia-induced Cav-1 generation might be involved in the migration and invasion of A549 cells.A possible role for HIF-1αis indicated in Cav-1 generation.

In order to obtain an efficient screening procedure for identification of succinate producing anaerobic strains,a semi-quantitative paper chromatography method was developed. Lactic acid and acetic acid were identified as the main byproducts in the process of succinate production by the high performance liquid chromatography (HPLC).Succinic acid was completely separated from the byproducts of lactic acid and acetic acid in the same broth developed by paper chromatography.The content of succinic acid was calculated by a semi-quantitative method.The results showed that paper chromatography was a simple and cost effective method that could be utilized to screen anaerobic strains producing succinic acid.

Objective To evaluate the correlation between cerebral blood volume and permeability surface by using muhislice CT perfusion imaging with glioma grade.Methods Ninteen patients with gliomas underwent conventional MR and multislice CT perfusion imaging preoperatively.These patients were divided into low grade and high grade groups which were correspond to WHO Ⅱ grade gliomas and WHO Ⅲ or Ⅳ grade gliomas respectively.CT data were transferred to on-line working station and processed to obtain time-signal curves,color perfusion maps and calculated perfusion parameters,including cerebral blood volume(CBV),cerebral blood flow(CBF),mean transit time(MTT)and permeability surfaces (PS)in tumoral parenchyma.Kruskal-Wallis test and correlation of CBV and PS was assessed by using SPSS 11.0 software.Results The median of CBV and PS in low-grade and high-grade glioma were 2.7, 6.5 ml/100 g;0.389,12.810 ml?100 g~(-1)?min~(-1),respectively,corresponding t value were 12.907, 13.500 with P

Objective To explore the prognostic value of biomarkers in type 2 diabetic patients with acute myocardial infarction (AMI), this study was to investigate the associations between the neutrophil to lymphocyte ratio (NLR), the Global Registry of Acute Coronary Events (GRACE) score and in-hospital mortality. MethodsSeven hundred and seven consecutive AMI patients were divided into diabetic group (DM-AMI group), impaired glucose tolerance group (IGT-AMI group), and normal glycemic group (NGT-AMI group). The laboratory and clinical characteristics were assessed retrospectively from the medical records. The NLR and GRACE score were calculated. Results In AMI patients, the DM-AMI group had significantly higher NLR and GRACE scores compared with those from the IGT-AMI group and NGT-AMI group (P<0.01 or P<0.05). In DM-AMI group, the NLR and GRACE score were considerably elevated in the elderly DM-AMI group compared with their younger counterparts (both P<0.01). Furthermore, the NLR was considerably higher in the high-risk group than those in both the low- and medium-risk groups based on the GRACE score (both P<0.01). The NLR was positively correlated with the GRACE score in DM-AMI group(r=0.425, P<0.01). The NLR level and GRACE score were higher in the death group than those in surviving patients (both P<0.01). The optimal cut-off levels of 9.36 for NLR and 166 for GRACE score seem to predicte death in-hospital. Based on the receiver operating characteristic curve, when to predict death in-hospital, the best cutoff value of NLR was 9.36 (sensitivity 80.8%, specificity 69.6%; area under curve 0.787), and the best cutoff value of GRACE score was 166 (sensitivity 76.9%, specificity 76.4%; area under curve 0.778). Conclusion An elevated NLR is a potential predictor of in-hospital mortality in type 2 diabetic patients with AMI, which could help clinicians indentify high-risk patients and determine appropriate treatment strategies. <英文关鍵词>>=Neutrophil to lymphocyte ratio; In-hospital mortality; Acute myocardial infarction; Diabetes mellitus, type 2

Background and purpose:Ovarian cancer-associated ifbroblasts (CAF) are known to promote epithelial malignancy. The chemoattractant cytokine growth-regulated oncogene alpha (Gro-α) secreted from CAF has been reported to mediate the stroma-epithelia interaction in tumor microenvironment, leading to the development of epithelial ovarian cancer, however, the detailed mechanism is unknown.This study was to determine whether Gro-αcould promote ovarian tumorigenesis through activating NF-кB nuclear translocation and VEGF expression in stromal ifbroblasts. Methods:ELISA was used to measure the levels of Gro-αin two cancer-associated ifbroblasts (CAF) and normal ifbroblasts (NF) isolated from high-grade serous ovarian cancer or normal ovarian tissues. CAF conditioned medium (CM) or Gro-αwas used to treat NF, while PS1145, the inhibitor of NF-кB, was used as control. NF-кB subunit p65 and vascular endothelial growth factor (VEGF) were detected by Western blot in cells after treatment. Xenograft tumors from nude mice were generated by injection of CAF, NF, or OVCA429 alone or OVCA429 mixed with CAF or NF, and by injection of OVCA429 mixed with NF cells that were treated with or without CAF-CM or Gro-α, or with NF cells that were treated with CAF-CM or Gro-αplus PS1145. The tumor growth curve was measured and the blood vessel density in xenograft tumor tissues was examined by histopathological analysis. Results:The levels of Gro-αwere 5-6 folds higher in CAF than in NF. Treatment of NF with CAF-CM or Gro-αstimulated the nuclear translocation of NF-кB subunit p65, and the expression of VEGF, but suppressed the expression of thrombospondin 1, the anti-angiogenesis factor, compared with control cells. However, treatment of NF with the NF-кB inhibitor PS1145 reversed these results. The animal assay revealed that CAF stimulated tumor growth stronger than NF, and NF treated with CAF-CM or Gro-α, but not along with PS1145, enhanced xenograft tumor growth through promoting angiogenesis. Conclusion:Ovarian CAF promotes the nuclear translocation of NF-кB and the expression of VEGF through Gro-αautocrine in tumor microenvironment to facilitate angiogenesis and ovarian cancer development.

Background and purpose: Cancer-associated fibroblasts (CAFs) are known to promote the invasion and metastasis of epithelial cancers. The cytokine IL-6 may mediate the interaction between stromal cells and epithelia in tumor microenvironment to facilitate the invasiveness and metastasis of cancer, however, such mechanism has not been fully covered yet.Methods:We used cervical cancer cell line HeLa as a model for this study. ELISA was used to measure the levels of IL-6 in CAFs and normal ifbroblasts (NFs) isolated from squamous cervical cancer or normal cervical tissues. CAFs conditioned medium or IL-6 was used to treat cervical cancer HeLa cell line. The epithelial-mesenchymal transition (EMT) markers such as N-Cadherin and Vimentin were detected by Western blot in cells before and after treatment. Scratches and transwell chambers were used to test the abilities of cell migration and invasion. Results:The levels of IL-6 were 4-5 folds higher in CAFs than in NFs. Treatment of HeLa cells with CAF conditioned medium or IL-6 upregulated N-Cadherin and Vimentin, but down-regulated E-Cadherin and cytokeratin, compared with control cells, indicating that IL-6 may stimulate HeLa cells to EMT. Further study found that Snail 1, the featured transcription factor for stem cells, was increased along with the enhanced phosphorylation of STAT3. Meanwhile, the migration and invasion of HeLa cells treated with IL-6 or CAF conditioned medium were markedly increased. Conclusion:CAF induces the EMT of cervical epithelial cancer cells through IL-6/STAT3/Snail pathway, which thereby promotes the invasiveness and metastasis cervical epithelial cancer.

Objective To investigate the prognosis of grommet insertions for osecretory otitis media in children and analyze the factors that may influence the results.Methods A retrospective review of 103 children (182 ears) with grommet insertions for osecretory otitis media from January 2011 to December 2011 was performed.They were divided into two groups(A and B) basing on the median age of 6 years old and observed their clinical manifestations,etiology and prognosis through two years' follow-up.The preoperative pure tone audiometry(PTA) hearing threshold,PTA in two weeks after surgery,the proportion of adenoid hypertro phy,the time of tube extrusion,the relapse of osecretory otitis media and repeat operation between two groups were compared.Results The difference of preoperative PTA and post operative PTA were not significant different between two groups(P＞0.05).But post operative PTA was lower than preoperative PTA(P＜0.05).The difference of otitis media recurrence was not significant different between two groups(P=0.088),but adenoid hypertrophy's proportion,tube extrusion's time and relapse were significant different(P＜0.05).Conclusion For school-age children with secretory otitis media need to extend the catheter time to reduce the probability of secondary catheterization.

Objective To evaluate the precision of GFR using Gates method and compared with the results from renal pathological changes. Methods Twenty-seven patients whose 99Tcm-DTPA renograms had no obvious uptake phase were enrolled in Group A, and 27 patients whose 99Tcm-DTPA renograms had obvious uptake phase were enrolled in Group B. The measurement of GFR by Gates method was compared to the creatinine clearance measured and predicted by Cockroft-Gault (C-G), modification of diet in renal disease (MDRD) and SCr level. Renal pathological changes in two groups were compared using Pearson correlation and t test analysis. Results In Group A, GFR determined by Gates method did not show correlation with that estimated by C-G or 1/SCr (r = 0. 357,0. 376, both P ＞0.05), but was significantly correlated with GFR estimated by MDRD(r = 0. 440, P ＜ 0.05). In Group B, GFR determined by Gates method showed significantly correlation among GFR estimated by MDRD, C-G, and 1/SCr (r =0. 471, 0. 527,0. 452, all P ＜ 0.05). Renal tubulointerstitial damage score in Group A was higher than that in Group B (7.15±2.32, 3.70±3.06, t=4.66, P ＜0.001). Conclusions GFR determined by Gates method is less precise when 99Tcm-DTPA renogram has no obvious uptake phase than that when 99Tcm-DTPA renogram has obvious uptake phase. Renal tubulointerstitial damage is a strong indicator of no obvious uptake phase in 99Tcm-DTPA renogram.

OBJECTIVETo study the effect of breastfeeding quality improvement on the breastfeeding rate in very low birth weight (VLBW) and extremely low birth weight (ELBW) infants in the neonatal intensive care unit (NICU).

METHODSA retrospective analysis was performed for the clinical data of VLBW and ELBW infants who were admitted from July 2014 to July 2015 (pre-improvement group) and those who were admitted from August 2015 to June 2016 after the implementation of breastfeeding quality improvement measures (post-improvement group). The parameters including condition of breastfeeding (breastfeeding rate, breastfeeding amount, and breastfeeding time), duration of parenteral nutrition, time to enteral feeding, and incidence of feeding intolerance were compared between the two groups.

RESULTSThe implementation of breastfeeding quality improvement measures significantly increased breastfeeding rate and amount, significantly shortened time to addition of human milk fortifier, duration of parenteral nutrition, and time to enteral feeding, and significantly decreased the incidence of feeding intolerance.

CONCLUSIONSBreastfeeding quality improvement measures can increase breastfeeding rate in the NICU and decrease gastrointestinal complications in preterm infants.

Breast Feeding ; statistics & numerical data ; Enteral Nutrition ; Female ; Humans ; Infant, Extremely Low Birth Weight ; growth & development ; Infant, Newborn ; Infant, Very Low Birth Weight ; growth & development ; Intensive Care Units, Neonatal ; Male ; Parenteral Nutrition ; Quality Improvement ; Retrospective Studies ; Weight Gain

Objective:To explore the predictive value of blood flow velocity changes in superior mesenteric artery (SMA) monitored by ultrasound on feeding intolerance (FI) of enteral nutrition (EN) in mechanically ventilated ICU patients. Methods:One-hundred and eight mechanically ventilated patients in Intensive Care Department of the Second People's Hospital of Nantong from February 2022 to February 2023 were enrolled. SMA blood flow parameters and enteral nutrition tolerance were monitored on the 1st,3rd,and 7th day (D1,D3,D7) after initiation of EN. Differences in SMA blood flow parameters between tolerant and intolerant group,as well as intolerant subgroups (mild,moderate,and severe) were analyzed. The predictive value of SMA blood flow parameters for FI and the risk factors of FI were also evaluated,and the relationship between SMA blood flow parameters and intestinal barrier function were preliminarily explored . Result:The SMA blood flow velocity parameters,peak systolic velocity (PSV) and end diastolic velocity (EDV),were higher at D1,D3,and D7 in the tolerant groups compared to the intolerant group (all P<0.05). Subgroup analysis showed that as the degree of intolerance increased,PSV gradually decreased. EDV at D1,D3,and D7 also gradually decreased with the increased severity of FI (all P<0.05);The AUC of PSV and EDV predicting FI in D1,D3,and D7 patients were 0.752 (95％ CI:0.660～0.830) and 0.773 (95％ CI:0.682～0.848),0.774 (95％ CI:0.683～0.849) and 0.796 (95％ CI:0.708～0.868),0.743 (95％ CI:0.650～0.822) and 0.713 (95％ CI:0.618～0.796). respectively. PSV,norepinephrine use,and blood phosphorus levels were independent prognostic factors for FI at D3. Patients with FI showed a negative correlation between PSV,EDV,and diamine oxidase (PSV:r=-0.857,P<0.001;EDV:r=-0.795,P<0.001). Conclusion:Changes in blood flow velocity in the superior mesenteric artery by ultrasound monitoring can effectively predict enteral nutrition intolerance in mechanically ventilated patients,it might have potential clinical application values in ICU patients.