1.Small fugal enteritis manifestation with intestinal obstruction and hematochezia: a case report
Chuancong WU ; Qin GUO ; Rui LIU
Journal of Central South University(Medical Sciences) 2017;42(4):481-484
Fungal enteritis was rarely reported.A case of fungal enteritis manifestation with jejunum multiple ulcers and obstruction was treated by Department of Gastroenterology,Third Xiangya Hospital,Central South University.After antifungal treatment,the clinical symptoms were relieved,and the ulcers in jejunal and upper gastrointestinal tract were healed completely.Clinical manifestation for small fungal enteritis is special,and the small intestine ulcer is easily to be misdiagnosed.It is helpful to prevent the misdiagnose for small fungal enteritis if we can tell the clinical features for this disease.
2.Neuroprotective effect of taurine against acute cortical neuron injury induced by oxygen-glucose deprivation
Can LUO ; Lianjun GUO ; Zhikai DAI ; Qin WU ; Jingshan SHI
Chinese Journal of Pharmacology and Toxicology 2006;20(1):1-6
AIM Taurine was reported neuroprotective under several ischemic models in vivo. In this study, the direct effect of taurine against oxygen-glucose deprivation (OGD) inducing acute neuronal injury and the underlying mechanisms in vitro were investigated. METHODSFour hours OGD was used to induce in vitro ischemic injury in rat cortical neurons. Taurine 5, 10 and 20 mmol·L-1 was added 20 h before and during 4 h OGD period respectively. Mortality rate of neuron was assayed by MTT and flow cytometry methods. Level of neuronal [Ca2+]i was detected by Fura 2/AM loading. Amino acid concentrations in culture media were measured by high performance liquid chromatography. RESULTS Under OGD conditions, neuronal death was markedly increased, and the levels of neuronal [Ca2+]i and extracellular glutamate level were enhanced obviously. Taurine pretreatment obviously decreased the percentage of neuronal death induced by OGD. In addition, abnormal elevation of neuronal [Ca2+]i and extracellular glutamate level induced by OGD both were markedly repressed by taurine. CONCLUSION Taurine can alleviate rat cortical neuron injury induced by OGD, the mechanisms were likely due to repressing calcium overload and inhibiting excessive release or leakage of glutamate under such conditions.
3.Assessment of Breast Cancer Response to Neoadjuvant Chemotherapy with Tumor's Size at MR Imaging
Chunxue WU ; Xiaoying WANG ; Naishan QIN ; Li GUO ; Xuexiang JIANG
Journal of Practical Radiology 2010;26(1):77-83
Objective To investigate the clinical value of tumor's longest diameter and volume in assessing pathologic response in locally advanced breast cancer treated with neoadjuvant chemotherapy(NAC).Methods A prospective study was undertaken in women undergoing NAC for locally advanced breast cancer in order to determine the ability of quantitative MRI to assess the final pathologic response. 36 cases with pathologically confirmed locally advanced breast cancer who had been undergone four courses of NAC underwent preoperative breast MRI three times during the NAC. Pathologic response was assessed according Miller & Payne grading system, of which grade 4 and 5 defined as major histological response (MHR), and grade 1 to 3 as non-major histological response (NMHR). The tumor's longest diameters and volumes in MHR were compared with those in NMHR by Mann-Whitney U test before, after the second and fourth cycle of NAC. Concordance correlation coefficient (CCC) were assessed to evaluate the agreement between the two method. Receiver operating characteristic curve (ROC) analysis was carried out to assess the clinical value of tumor size and the change rate.Results Before,after the second and the fourth cycle of NAC, the difference of tumor's longest diameters and their first change rate between MHR [(2.75±1.16) cm,(2.19±1.07) cm ,(1.58±0.75) cm and (21.70±15.09)%]respectively,and NMHR [(2.71±1.10) cm,(2.33±0.90) cm,(2.01±0.94) cm and (11.68±10.27)%] respectively were not significant(P>0.05). The second change rate of tumor's longest diameter in MHR [(39.00±15.38)% ] was significantly higher than that in NMHR[ (25.83±21.77)% ](P=0.04). Before, after the second and the fourth cycly of NAC, the differences of tumor volumes and their first change rate between MHR [ median 14.00 cm~3 ( range 2.96~83.41 cm~3 ) , median 7.31 cm~3 (range 0.05~55.35 cm~3), median 2.69 cm~3 (range 0~33.40 cm~3 ) , median 48.65% (range 33.64%~98.48%) ] and NMHR [median 4.25 cm~3 (range 4.78~106.55 cm~3), median 10.53 cm~3 (range 1.72~42.85 cm~3), median 7.56 cm~3 (range 0.68~156.58 cm~3), median 52.04% (range-35.79%~78.31%) ] were not significant. The second changing rate of tumor's volume in MHR [median 85.37% (ranged 27.52%~100%)] was significantly higher than that in NMHR [median 68.80% (ranged -289.60%~94.24%)](P=0.01). CCC was computed before and (0.82), after the second cycle (0.67) and after the fourth cycle (0.55), in all examinations pooled together (0.78).The second change rates of tumor's longest diameter and volume were equal to predict the final pathologic response, and the area under curve were 0.75 and 0.80, respectively (P=0.61). Conclusion The agreement between the tumor's longest diameters and tumor's volumes is good in all in breast carcinoma. The assessment efficacy of the change rate of tumor's longest diameter and that of volume were low.
4.Effects of ischemic postconditioning on neuron structure plasticity and memory after global cerebral ischemia injury in rats
Xin LI ; Xinyue QIN ; Zhenwei GUO ; Xiaohui WU
Chinese Journal of Trauma 2010;26(8):757-760
Objective To observe the effect of ischemic postconditioning on neuron structure plasticity and memory after global cerebral ischemia injury in rats and discuss the protection mechanism from aspect of Morphology. Methods A total of 36 SD male rats were randomly divided into sham operation group, global cerebral ischemia for 15 min group and global cerebral ischemia plus postconditioning group, 12 rats per group. The pullsinelli 4 vessel occlusion was applied to produce the models of global cerebral ischemia reperfusion injury, common carotid arteries (CCA) occlusion with 15 min and postconditioning with three cycles, of 15 sec release and 15 sec occlusion (15s/15s). Six rats from each group were evaluated by Morris Maze test for the ability of space learning and memory and the other six rats were evaluated by golgi stain for morphologic change of neuron. Results The ischemic postcondtioning group showed significant shorter mean escape latency compared with the sham operated group ( at day 3, P =0. 014; at day 4, P =0.040; at day 5, P =0.001 ). The density of dendritic spine in ischemic postcondtioning group was increased more significantly compared with ischemic group ( F = 562. 820,P < 0. 01 ). Conclusion Ischemic postconditioning has obvious protective effect on cerebral ischemiainduced memory impairment, which may be related to alleviation of dendritic spine injury.
5.Effect of endothelial colony-forming cells conditioned medium on biological function of human dermal fibroblasts
Bulin WANG ; Yanhong WU ; Yuzhi WANG ; Xiaorui GUO ; Qin LI
The Journal of Practical Medicine 2017;33(6):862-866
Objective To examine the effect of endothelial colony-forming cells conditioned medium(ECFCs-CM)on biological function of human dermal fibroblasts(HDFs). Methods Human cord blood derived-ECFCs were isolated and identified based on the previous studies. The cytokines in ECFCs-CM were detected using a cytokines antibody array. HDFs were cultured with ECFCs-CM,using serum free EBM-2 as control. The proliferation of HDFs was examined by Cell Counting Kit-8(CCK-8)and the migration was assessed by scratch test assay. The apoptosis of HDFs was detected by flow cytometry. Results The cells isolated from human cord blood demonstrated typical characteristics of ECFCs. The cytokines antibody array indicated that ECFCs-CM contained large amounts of secreted cytokines such as PDGF-BBand EGF. Compared with the control group,the HDFs cultured with ECFCs-CM showed improved proliferation and migration ability. The number of apoptotic cells was smaller than that of the control group under the environment of serum starvation. Conclusion ECFCs-CM can promote the proliferation and migration of HDFs and inhibit the apoptosis of HDFs under the environment of serum starvation.
6.A patient with frontotemporal dementia-case report
Dongdong WU ; Shaosen QIN ; Hong GUO ; Shifang HOU ; Haibo CHEN
Chinese Journal of Geriatrics 2017;36(3):325-327
7.Effect of As2 O3 and paclitaxel on the proliferation of A549 cell and ectopic tumor growth of nude mice
Xiaopeng WU ; Xiaomin LIU ; Qin LIU ; Yanzhen GUO
Chinese Journal of Biochemical Pharmaceutics 2014;37(4):66-69
Objective To evaluate the effect of As2O3 combined with paclitaxel(PTX)on the treatment of lung cancer.Methods The anti-proliferation efficiency of As2 O3 combined with PTX was evaluated by MTT assay.Tumor spheroids were used to evaluate anti-tumor ability of As2 O3 combined with PTX.Transmission electron microscope (TEM)were used to observe the apoptosis morphous.A549 cell were xenografted in mice to establish the animal model,and the nude mices were devided into four groups,saline group,As2 O3 group,PTX group and As2 O3 +PTX group.The animal model were used to evaluate the effect of anti-tumor.The tumor size of every group were measured.HE was used to observe the apoptosis of cancer cells. Results The cell inhibition rate of A549 cell were(3.35 ±0.21)%,(47.55 ±2.25)%,(64.64 ±3.35)%and(84.58 ±3.76)%after treatment with saline,As2O3,PTX and As2O3combined with PTX after 48h respectively(P<0.01).The early apoptosis rate of cancer cells were 0.26%,9.7%, 17.8% and 42.5% for saline group,As2 O3 group,PTX and As2 O3 +PTX group respectively(P<0.01 ).The final tumor spheroid volumes in saline group increased 1.36 times after 7 days.The final tumor spheroid volumes reduced to(77.35 ±2.31)%,(61.68 ±2.44)% and(44.85 ±3.34)% in As2O3,PTX and As2O3 combined with PTX group respectively(P<0.01).The inhibition of lung cancer in vitro demonstrated the inhibition rate of tumor growth compared with saline group were(22.4 ±4.5)%,(39.5 ±6.2)% and(69.5 ±7.3)% for As2O3,PTX and As2O3 +PTX,respectively(P<0.01 ).Conclusion As2 O3 combined with PTX can effectively inhibit the proliferation of A549 cells and ectopic tumor growth in nude mice and it may be a potentially effective treatment for lung cancer.
8.The effect of allogeneic MHC Ⅰ gene modification on the immunologic character in bone marrow cells
Lanxiao WU ; Kunyuan GUO ; Yu QIN ; Al ET
Chinese Journal of Immunology 1985;0(06):-
Objective:To observe the effect of allogeneic MHC Ⅰ gene modification on the immunologic character in bone marrow cells and to investigate the mechanism of induce immunologic tolerance of MHC Ⅰ.Methods:The retroviral expression vector of BALB/C mice H 2D d gene was constructed and transducted into C57BL/6 mice bone marrow cells And the expression of H 2D d on the infected cells was detected by FACS technique Then observe the MLR between the BALB/C mice spleen T cells and the C57BL/6 mice bone marrow cells modified with H 2D d gene by MTT assay The cytotoxic activity of BALB/C mice NK cells to the C57BL/6 mice bone marrow cells modified with H 2D d gene was detected by LDH release assay Results:Either stimulation or response ability of the C57BL/6 mice bone marrow cells to the T cell from BALB/C mice spleen was significantly decreased after modified with H 2D d gene The cytotoxic activity of BALB/C mice NK cells to the C57BL/6 mice bone marrow cells modified with allogeneic MHC Ⅰ gene was significantly lower than which to the C57BL/6 mice bone marrow cells non modified Conclusion:It's maybe a way to induce immunologic tolerance in bone marrow transplantation by the means of modify the bone marrow cells with the MHC Ⅰ gene of the recipient
9.The clinical significance of CYP2C19 genotype detection for antiplatelet therapy of cardiovascular and cerebrovascular diseases in the elderly
Xiaoyan WU ; Jianjun GUO ; Ruying FU ; Ting CHEN ; Qinbao QIN
Chinese Journal of Geriatrics 2017;36(1):37-40
Objectives To investigate the clinical significance of CYP2C19 genotype detection for antiplatelet therapy of elder cardiovascular and cerebrovascular diseases(CCVD).Methods We enrolled all elderly patients with either cardiovascular or cerebrovascular disorders who received clopidogrel as mono drug or in combination with another antiplatelet drug aspirin as secondary prevention for more than 12 months in our hospital from January to August 2015.Somatotypes of CYP2C19 genotypes of all participants were assessed to analyze the relapse of cardiac-cerebral vascular diseases in these patients.Results A total of 250 patients were enrolled,including 179 male and 71 female,with average age of (85.2 ± 7.9) years.Among these patients,there were 97 (38.8%) cases with EM CYP2C19 genotypes,110 cases(44.0 %) with IM CYP2C19 genotypes,43 cases(17.2 %) with PM CYP2C19 genotypes.When treated with clopidogrel for antiplatelet in secondary prevention process,the rate of the relapse in cardiovascular event was 34.9% and higher in PM CYP2C19 genotype than in EM and IM CYP2C19 genotype (19.6 % and 15.5 %,respectively) (x2 =7.251,P =0.027).This phenomenon was similar to patients who received stent implantation(x2=6.393,P =0.041).However,no statistically significant difference was observed in the recurrence rate of cerebral vascular disease between three different genotypes(EM 29.9 %,IM 20.0 %,PM 27.9%,x2 =2.880,P =0.237).Conclusions Our results highlight that CYP2C19 genotype might be a potential guidance for secondary prevention of cardiovascular and cercbrovascular disorders among elderly patients.Clopidogrel may be less effective in patients with SM CYP2C19 genotype than those with EM or PM CYP2C19 genotype for secondary prevention of cardiovascular disease.
10.Isolation and Purification of Antibacterial Peptides from the Larvae Secretion of Housefly and the Characteristics
Guo GUO ; Jianwei WU ; Ping FU ; Ronggui QIN ; Yong ZHANG ; Zhikui SONG
Chinese Journal of Parasitology and Parasitic Diseases 1987;0(02):-
Objective To isolate and purify the antibacterial peptides from larvae secretion of housefly (Musca domestica) and study their partial characteristics. Methods Protein isolation and purification were performed by routine process, namely, ultrafiltration, solid phase extraction (SPE) and reversed-phase high-performance liquid chroma-tography (RP-HPLC). The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of the antibacterial peptides were examined. The antibacterial effect of peptides was studied in nutritive medium with different pH value(pH 5.0-10.0), divalent cations (Mg2+: (0.5?10-3~10.0?10-3)mol/L, Na+、K+: (10?10-3~100?10-3)mol/L), and serum content(12.5%~75%). Results Molecular weight of the peptides was about Mr 3 000-30 000 after ultrafiltration. The fractions eluted with 20%, 30%, 70%, and 80% of acetonitrile (ACN) all showed antibacterial activity by solid phase extraction. The fractions eluted with 70% ACN showed strongest and stablest antibacterial activity which was further purified by RP-HPLC. Two sub-fractions appeared at around RT 15.5 min and 18.5 min were obtained with antibacterial activity. The MIC to those standard Escherichia coli, Pseudomonas aerugirwsa, Staphylococcus aureas, and Bacillus subtilis was 32.7380, 16.3688, 65.4750 and 32.7380?g/ml respectively. In the nutritive medium of pH 6.0-9.0, different divalent cations and serum content, the increment of A570 in experiment groups was less than 0.05, while that of the control group was greater than 0.3 (P