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Improved conjunctival transplantation for corneal ulcer

Qinghua ZHOU ; Xianhua LONG ; Xiaohua ZHU

Journal of Central South University(Medical Sciences).2010;35(8):814-818. doi:10.3969/j.issn.1672-7347.2010.08.007

Objective To evaluate the therapeutic effect of pedical conjunctival flap transposition on refractory corneal ulcer. Methods The data of 56 eyes of 56 patients with refractory corneal ulcer who underwent pedical conjuctival transposition in a tertiary eye unit in China from June 2005 to June 2009 were retrospectively analyzed. There were 36 infective corneal ulcers, 9 keratoplasty graft ulcers, 4 traumatic ulcers, and 7 chemical burn ulcers. All patients were treated with focal debridement and pedical conjuctival flap transposition. Results Forty-seven out of 56 (83.9%) were cured after one surgery, and 5 (8.9%) had conjunctival flap retraction, among which 3 underwent the second surgery and 2 had the third surgery to completely heal. Four patients (7.2%) turned to lamellar keratoplasty because of fungal corneal ulcer relapse. Ulcer in 52 patients healed and the globe preserved. They had different levels of vision improvement. Conclusion Pedical conjunctival flap transposition is effective for refractory corneal ulcer.

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Losartan attenuates vascular remodeling of the aorta in spontaneously hypertensive rats and the underlying mechanism

Fangxiong LI ; Ruizheng SHI ; Meichun LIAO ; Jianzhe LI ; Shixun LI ; Wei PAN ; Tianlun YANG ; Guogang ZHANG

Journal of Central South University(Medical Sciences).2010;35(8):807-813. doi:10.3969/j.issn.1672-7347.2010.08.006

Objective To determine the effect of losartan on vascular remodeling and the underlying mechanism in spontaneously hypertensive rats(SHR). Methods SHR of 12 weeks old were given losartan orally [0,15,30 mg/(kg·d),n=12]. The tail arterial pressure was measured every week.Eight weeks later, the pathological changes and p22phox expression in the thoracic aorta, the activity of catalase (CAT), the contents of H2O2 and AngⅡ in the plasma were evaluated. Results Blood pressure was increased in the SHR accompanied by the thickened wall and increased p22phox expression in the thoracic aorta. The plasma levels of H2O2 and AngⅡwere elevated while the CAT level was decreased in the SHR. Administration of losartan reversed the thickened wall and increased the CAT activity concomitantly with the decreased plasma levels of H2O2 and p22phox expression in the SHR. The plasma level of AngⅡincreased after the losartan treatment. Conclusion Oxidative stress induces the vascular remodeling of the aorta in the SHR. Losartan can reverse the vascular remodeling through down-regulating p22phox expression and inhibiting the oxidative stress.

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Effect of morphine preconditioning on mitochondrial permeability transition pore after myocardial ischemia-reperfusion injury in rats

Zhibiao HE ; Zaimei PENG ; Liyan JIN ; Junmei XU ; Xiangping CHAI

Journal of Central South University(Medical Sciences).2010;35(8):800-806. doi:10.3969/j.issn.1672-7347.2010.08.005

Objective To investigate the effect of morphine preconditioning on mitochondrial permeability transition pore (MPTP) and its protective mechanism after myocardial ischemia-reperfusion injury. Methods A rat model of ischemia-reperfusion injury was established. Forty rats were injected with 2-3[H] DOG and then divided into 4 groups randomly: a sham operation (S) group, an ischemia-reperfusion injury (IR) group, a morphine preconditioning (Mp+IR) group, and a cyclosporine A preconditioning (CsA+IR) group. We monitored the concentrations of serum creatine kinase-Mb (CK-Mb) and cardiac troponin I (cTnI), and measured myocardial mitochondrial 2-3[H] DOG, cytochrome c content, Ca2+ concentration ([Ca2+]m), the velocity of Ca2+ intake and reaction half time of mitochondrial permeability transition pore (MPTP t1/2) in the 4 groups. Results The concentrations of serum CK-Mb and cTnI decreased more in the Mp+IR group and the CsA+IR group than those of the IR group. The concentrations of 2-3[H]DOG and [Ca2+]m in the IR group were evidently higher but the level of cytochrome c was lower than those of the sham operation group. The concentrations of 2-3[H] DOG and [Ca2+]m in the Mp+IR group decreased whereas the concentration of cytochrome c increased compared with those in the IR group. Mitochondrial 2-3[H]DOG content was positively correlated with the concentration of calcium (r=0.797, P<0.01). The 2-3[H]DOG and [Ca2+]m content were negatively correlated with cytochrome c in the IR group (r=-0.805 and r=-0.648, respectively, P<0.01). MPTP t1/2 in the IR group was shortened evidently, and that in the Mp+IR and CsA+IR group was significantly lengthened. Conclusion Morphine preconditioning may have myocardial protective effect through unburdening the calcium overload and lengthening the MPTP t1/2.

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Construction of luciferase reporter gene vector for human MUC5AC gene promoter and analysis of its transcriptional activity

Shengjin LI ; Xiangdong ZHOU

Journal of Central South University(Medical Sciences).2010;35(8):792-799. doi:10.3969/j.issn.1672-7347.2010.08.004

Objective To clone the human mucin (MUC)5AC gene promoter and construct its luciferase reporter vector for human MUC5AC gene and analyze its transcriptional activity. Methods The 1 348 bp DNA sequence at the human MUC5AC gene 5 end was analyzed by the Vector NTI software.After the target sequence from human A549 cells genomic DNA was amplified by PCR method, and the product of PCR was sequenced.By promoter deletion analysis, 3 promoter segments with diferent lengths were amplified by PCR, then the products were identified by DNA sequencing, and 4 promotor segments were inserted into pGL3- enhancer vectors.Site-specific mutagenesis technique was used to establish mutants of specificity protein (SP)-l and nuclear factor-kappa B (NF-кB) site in MUC5AC gene promoter. The relative luciferase activities were detected in the transfected A549 cells. Results Sequence analysis indicated that there were many cis-acting elements in the regions of 1 348 bp DNA sequence at the human MUC5AC gene 5 end.The 4 reporter gene vectors with promoter segments with different lengths were constructed successfully.Dual-luciferase assay revealed the 372 bp fragment including activity with the minimal fragment. Neutrophil elastase (NE) could increase the expression of luciferase reporter gene plasmid containing mutated NF-кB version (P＜0.05 vs. contro1) of MUC5AC promoter in the transfected A549 cells. The induction by NE decreased markedly when the SP-l element in MUC5AC promoter were mutated. Conclusion This research may provide an important basis for the further study of human MUC5AC gene promoter activity and regulation of gene expression.There is an up-regulative element of gene transcription in the region of -324 to -64 bp in MUC5AC gene upstream. SP-l site of the promotor mediates NE-induced MUC5AC expression in human A549 cells.

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Change of ESBLs-KPN and ESBLs-ECO after antimicrobial intervention

Yawen GAO ; Yu YANG ; Yuetao WU ; Wei CAO ; Qiwei ZHOU

Journal of Central South University(Medical Sciences).2010;35(2):165-170. doi:10.3969/j.issn.1672-7347.2010.02.013

Objective To evaluate the change of extended spectrum β-lactamase (ESBLs) Producing Klebsiella Pneumoniae (ESBLs-KPN) and Escherichia coli (ESBLs-ECO) causing nosocomial infection after antimicrobial intervention. Methods We regularly monitored the data on the yearly consumption [defined as daily dose (DDD) per 1 000 patient-days] of frequently used antibiotics from Dec. 2004 to Dec. 2007. From Jan. 2005 to Dec. 2007, we monitored the resistance of frequently used antibiotics and the timely integrative antimicrobial intervention was based on the outcome of antimicrobial resistance. We also monitored the isolation rate of ESBLs-KPN and ESBLs-ECO causing nosocomial infection. The departments studied were the experimental group and other comparable medical departments were the control group(ICU was excluded).Results The isolation rate of ESBLs-KPN ((43.90%)) and ESBLs-ECO (45.83%) in the experimental group was higher than that in the control group (28.04% and 24.90%, respectively) before the intervetion (P＜0.05). The isolation rate of ESBLs-KPN decreased (from 26.47% to 17.65%) in the experimental group and that in the control group increased ( ESBLs-KPN: from 34.18% to (52.94%;) ESBLs-ECO: from 47.13% to 63.78%) from 2005 to 2007 (P＜0.05). The isolation rate of ESBLs-KPN and ESBLs-ECO in the experimental group was lower than that in the control group after the antimicrobial intervention (P＜0.05). Usage of ceftazidime and cefoperazone/sulbactam and imipenem was reduced and the consumption of cefepime was increased in the experimental group ((P＜0.05)). Consumption of ceftazidime and cefoperazone/sulbactam and cefepime was increased. Conclusion The prevalence of ESBLs-KPN and ESBLs-ECO may be decreased after the integrative antimicrobial intervention.

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Effect of ulinastatin on perioperative inflammatory response to coronary artery bypass grafting with cardiopulmonary bypass

Qi ZHOU ; Gang WANG ; Changqing GAO ; Tingting CHEN

Journal of Central South University(Medical Sciences).2010;35(2):107-110. doi:10.3969/j.issn.1672-7347.2010.02.003

Objective To determine the effect of ulinastatin on perioperative inflammatory response to coronary artery bypass grafting (CABG) with cardiopulmonary bypass (CPB). Methods Forty patients undergoing CABG with CPB were randomly divided into 2 groups: a ulinastatin group (1.5×10~4 U/kg before CPB, n=20) and a control group (n=20). The inflammatory cytokines such as tumor necrosis factor-α (TNF-α), interleukin (IL)-6, IL-10 and neutrophil elastase (NE) were measured before the anesthesia (T1), 1 h after the start of CPB (T2), 1 h after weaning of CPB (T3), and 24 h after weaning of CPB (T4). The postoperative organ dysfunction in the 2 groups was noted.Results The concentration of TNF-α, IL-6, IL-10, and NE at T2,T3, and T4 and increased more significantly than that at T1 in the 2 groups(P<0.05). The concentration of TNF-α, IL-6 and NE at T2, T3, and T4 in the ulinastatin group decreased more significantly than that in the control group (P<0.05), and IL-10 in the ulinastatin group increased at the same time. The postoperative complications of pneumonia, kidney and central nervous system in the ulinastatin group decreased more significantly than that in the control group (P<0.05). There was no significant difference in the postoperative cardio or liver complications and hours in the ICU between the 2 groups.Conclusion Administration of ulinastatin before CPB can decrease the inflammatory response and complication during CABG.

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Effect of calcitonin gene-related peptide on the expression of triggering receptor expressed on myeloid cells-1 in lipopolysaccharide-induced macrophages

Yunchao LI ; Chaxiang GUAN ; Yang ZHOU ; Guoying SUN ; Meng SHI ; Jing WU ; Wenjie LI

Journal of Central South University(Medical Sciences).2010;35(2):100-106. doi:10.3969/j.issn.1672-7347.2010.02.002

Objective To determine the effect of calcitonin gene-related peptide (CGRP) on triggering receptor expressed on myeloid cells-1 (TREM-1) in the lipopolysaccharide (LPS)-induced macrophages and its signal transduction pathway. Methods The levels of TREM-1 mRNA in the macrophages were observed by reverse transcription-polymerase chain reaction (RT-PCR), and flow cytometry was performed to detect TREM-1 protein expression levels in the macrophages. Results CGRP had no regulating effect on the expression of TREM-1 in the macrophages; LPS could up-regulate macrophages to express TREM-1; CGRP increased TREM-1 mRNA expression in LPS-induced macrophages in dose and time-dependent manner; CGRP increased TREM-1 protein expression in LPS-induced macrophages, which could be partially reversed by H-7 or H-89 (P<0.05). Conclusion CGRP can regulate the LPS-induced macrophages synthesis and secretion of TREM-1, and the intracellular signal transduction pathway is related to PKA and PKC.

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Regulation of ciliary trafficking of polycystin-2 and the pathogenesis of autosomal dominant polycystic kidney disease

Yiqiang CAI ; Zhangui TANG

Journal of Central South University(Medical Sciences).2010;35(2):93-99. doi:10.3969/j.issn.1672-7347.2010.02.001

Autosomal dominant polycystic kidney disease (ADPKD) is one of the most common human hereditary disorder characteristic of development of bilateral multiple fluid-filled kidney cysts. Accumulated evidence has suggested that primary cilium of renal epithelial cell plays a key role in cystogenesis. In this article we will give an overview on the basic information about polycystic kidney disease (PKD) and summarize the recent progresses in studies of regulation of polycystin-1 and -2 trafficking to cilia. We will also discuss the possible role of trafficking defects of polycystins on the pathogenesis of ADPKD.

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Metabonomic analysis of rat urine 1H magnetic resonance spectra based on different normalization methods

Mamtimin BATUR ; Hasim AYSHAMGUL ; Chunli CHEN ; Upur HALMURAT

Journal of Central South University(Medical Sciences).2010;35(12):1214-1218. doi:10.3969/j.issn.1672-7347.2010.12.002

Objective To study metabonomics in the urine of rats of different genders by magnetic resonance (MR) with 2 normalization methods. Methods Different normalization methods such as mean-centering not scaling (Ctr) and unit variance scaling (UV) were used before orthogonal to partial least squares discriminant analysis(OPLS-DA). Distinguished metabolites in the urine of different gender rats were analyzed by calculating the correlation coefficients. Results The data normalized by Ctr before OPLS-DA analysis revealed high degree conception metabolites in the urine such as valine, alanine, acetate, ornithine, aminohippurate, phenylethylamine, cytosine, citrate, dimethylamine, allantoin, methylamine, fumarate and one unknown metabolite whose chemical shift was δ4.14. Data normalized by UV before OPLS-DA analysis revealed the above 12 high degree conception metabolites except citrate, and also low degree conception metabolites such as thiamine, creatinine, formate and one unknown metabolite whose chemical shift was δ2.92.Conclusion Unit variance scaling is a more effective normalization method in metabonomic analysis.

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Brain natriuretic peptide rs198388 polymorphism and essential hypertension in Hunan Han people

Min CHEN ; Xiaoping CHEN ; Yijie GUO ; Ruizheng SHI ; Guogang ZHANG

Journal of Central South University(Medical Sciences).2010;35(12):1207-1213. doi:10.3969/j.issn.1672-7347.2010.12.001

Objective To investigate the relation between brain natriuretic peptide (BNP) rs198388 polymorphism and the susceptibility of essential hypertension in Han population of Hunan. Methods A total of 567 patients with hypertension (the hypertension group) and 555 healthy volunteers (the control group) were enrolled. Gender, age, smoking and drinking history of the 2 groups were not significantly different. Blood pressure was measured in the 2 groups. After fasting for 12 h or more, blood glucose, total cholesterol, triglycerides, high density lipoprotein cholesterol and low density lipoprotein cholesterol were measured. DNA polymorphism analysis was done by polymerase chain reaction-restriction fragment length polymorphism method, and genotype was determined by agarose gel electrophoresis. Results The GG, GA, and AA genotypeswere detected.The frequencies of GA and AA genotypes and A allele were significantly lower in the hypertension group (GA and AA:12.3%;A:6.9%) than those in the control group (GA and AA:18.4%; A:9.7%; P=0.009, and P=0.014, respectively). Conclusion BNP rs198388 polymorphism may be associated with essential hypertension in Han people in Hunan. Carrying rs198388 GA and AA genotypes and A allele may be the reason for low risk of hypertension.

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