2.Inhibitive effect of aluminium on evoked potentials in hippocampal CA3 region in rats and the relationship with cholinergic and gamma-aminobutyric acid system
Jianfeng HU ; Hongmei XIAO ; Ai LI
Chinese Journal of Tissue Engineering Research 2005;9(9):218-221
BACKGROUND: As indicated by previous researches, aluminium (Al) could affect learning and memory of animals through many approaches in cluding affecting the stable status of intracellular calcium, decreasing protein kinase C(PKC) activity, and affecting the release of glutamic acid(Glu) . The formation of long-term potentiation(LTP) weakens in hip pocampal CA3 region of rats fed by forage containing Al. It could be found that Al would weaken evoked potential(EP) in hippocampal CA3 region and inhibit LTP formation, which might be related with the damaging effect of Al on L-Arg-NO approach through further application of acute Al administration, i.e., AlCl3 is directly injected into hippocampal CA3 region by microinjection.OBJECTIVE: To investigate the damaging effect of Al on learning and memory, and its correlation with cholinergic system and gamma-aminobutyric acid (GABA) system.DESIGN: A completelyrandomized controlled verifying study based on the experimental animals.SETTING: Department of psychology in a university and the medical college of an occupational technology college.MATERIALS: The study was conducted in the Laboratory of Neuro-Electrophysiology, the Faculty of Physiology, Tongji Medical College,Huazhong University of Science and Technology between September 2000 and April 2001. Totally 68 SD rats of ordinary grade in either gender with a body mass between 150 g and 250 g were obtained from the Department of Experimental Animals of Tongji Medical College, Huazhong University of Science and echnology.INTERVENTIONS: SD rats were randomly divided into 9 groups including normal NS ( NS ) control group ( n = 6): 1 μL of NS was injected twice ( 1 minute interval) into hippocampal CA3 region by microinjection; NS + AlCl3 group( n = 6): 1 μL of NS and 0.5 mol/L of AlCl3 were injected(1 minute interval) into hippocampal CA3 region by microinjection;NS + Tac group( n = 6): 1 μLof NS and 1 × 10-9 mol/L of Tacrine were injected in turn into hippocampal CA3 region by microinjection; NS + Bic group(n=6): 1 μL of NS and 1 × 10-3 mol/L of Bicuculline were injected in turn into hippocampal CA3 region by microinjection; Tac +AlCl3 group: 1 μL of 1 × 10-9 mol/L( n =8),1 × 10-10 mol/L ( n = 6) and 1 × 10-8 mol/L of Tacrine were firsdy injected into hippocampal CA3 region by microinjection, and 1 μL of 0. 5 mol/L AlCl3was injected 1 minute later; Bic + AlCl3 group: 1 μL of 1 × 10-3 mol/L( n = 9) and 1 × 10 -4 mol/L( n = 7) of Bicuculline were firstly injected into hippocampal CA3 region by microinjection, and 1 μL of 0.5 mol/L AlCl3 was injected 1 minute later. Population spike(PS) in hippocampal CA3 region was recorded after using single pulse to stimulate perforating fiber(PF). When PS became stable, medication was injected into hippocampal CA3 region to observe the impacts of Al on EP in hippocampal CA3 region and the impacts of some central transmitters on the effect of Al in in hibiting PS.MAIN OUTCOME MEASURES: PS evoked in hippocampal CA3 region;the impacts of Al on EP in CA3 region and the impacts of some central transmitters on the effect of Al in inhibiting PS. RESULTS: ① After the application of 0.5 mol/L of AlCl3 in hippocampalCA3 region by microinjection, the recorded amplitude of PS reduced to peakat 1 minute, which accounted for(33.8 ± 11. 0) % of the level beforemedication( n = 6). The inhibitive effect of AlCl3 lasted for 120 minutes. ② After the pre-application of 1 × 10-9 mol/L of Tacrine(cholinesterase in hibitor) into CA3 region by microinjection and the application of AlCl3 at oneminute later, it was found that Tacrine antagonized the inhibitive effects ofAlCl3 on PS within 1 to 30 minutes( n = 8) . Its antagonism would extend to60 minutes if 1 × 10-8 mol/L of Tacrine was administrated( n = 6) . How ever, the antagonism of 1 × 10-10 mol/L of Tacrine was weaker than that of 1×10-9 mol/L group within 3-5 minutes(n=6) ③ After thepre-application of 1 × 10-3 mol/L of Bicuculline into CA3 region by mi croinjection and the application of AlCl3 at one minute later, Bicucullinecould partially weaken the effects of AlCl3 within 1 to 20 minutes( n = 9). CONCLUSION: Al of certain concentration can inhibit the evoked PS am plitude in hippocampal CA3 region; Tacrine can antagonize Al' s effects andits antagonism might be related with dose. Hence, the inhibitive effects of Almight be related with the damage in Ach transmitter system. The applicationof Bicuculline, a GABAA inhibitor, also can weaken the PS inhibitive effectsof Al, which indicates that the inhibitive effect of Al also might be effective through GABA approach.
3.Molecular Epidemiology and Mechanism of Producing ?-Lactamases in Multidrug-resistant Acinetobacter
Xiaoman AI ; Xiuzhen ZHANG ; Yunjian HU
Chinese Journal of Nosocomiology 2009;0(20):-
OBJECTIVE To investigate the variation of in vitro activity,the ?-lactamases,type diversity and the homology of multiple resistances in Acinetobacter isolated.METHODS The multiple resistant Acinetobacter were selected to detect susceptibility test by K-B antimicrobial agents.The resistant rates were analyzed by WHONET 5.4,the isolates ?-lactamases phenotype was detected by three-dimensional test,genomic types were measured by PFGE.The ?-lactamases genotype was determined by PCR assay with specific-primer,and DNA sequencing was also used to analyze resistance-related gene.RESULTS Twenty-eight of 45 strains were OXA producing strains(68.3%),10 strains were IMP producing strains(24.4%),13 strains were TEM producing strains(31.7%),18 strains were CTX-M producing strains(43.9%),6 strains were PER producing strains(14.6%),and 7 strains were AmpC producing strains(17.1%).None produced SHV ?-lactamases.Twenty-four strains were produced 2 or more than 2 kinds of ?-lactamases.CONCLUSIONS The multiple resistance of Acinetobacter can produce kinds of ?-lactamases,but producing ?-lactamases are not the only one mechanism.
5.Analyze causes of adverse reactions induced by traditional Chinese medicine injections from its quality standards.
China Journal of Chinese Materia Medica 2014;39(5):934-940
Reviewing the literatures about adverse reactions induced by traditional Chinese medicine injections (TCMI) reported on CNKI from 1983 to 2013. Analyzing the causes of adverse reactions induced by TCMI from its quality standards. Provide ideas for improving security of TCMI and completing its quality standards. This review indicates that TCMI-induced adverse reactions have little relationship with the number of compositions, but have tight connection with chemical ingredients and solvents. Adverse reactions can be decreased by perfecting the quality standards of TCMI.
Adverse Drug Reaction Reporting Systems
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Drug Therapy
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standards
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Drug-Related Side Effects and Adverse Reactions
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epidemiology
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etiology
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Drugs, Chinese Herbal
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administration & dosage
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adverse effects
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standards
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Humans
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Injections
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Quality Control
6.Clinical characters of pulmonary thromb-embolism in ≥70 elderly patients
Haimei QI ; Bing LIU ; Hu AI ;
Chinese Journal of Geriatrics 2000;0(04):-
Objective To explore the clinical characteristics and effects of thrombolytic and anti coagulation treatment in over 70 year old patients with pulmonary thromb embolism(PTE). Methods The clinical findings, diagnostic techniques, effects of thrombolytic therapy and anti coagulation in 58 over 70 year old patients with PTE were analyzed retrospectively. Results Deep venous thrombosis (DVT) in lower limbs (74 1%) was the most common thrombolism prone factors in our study. Limitation of movement and long term stay in bed due to a variety of causes were in the next place. The clinical findings were atypical, associated with a false diagnostic ratio of 46 5% in elderly patients with PTE. Undefined causal and different degree of dyspnea along with sudden and persistent hypoxemia were the main characteristics. Spiral CT and radioactive nuclear ventilation perfusion scan were important methods for diagnosis of PTE with positive finding of 95 7% and 62 5%, respectively. The effective and cure rate of thrombolytic therapy combined with anti coagulation, anti coagulation and anti platelet therapy was 91 3%, 75 8%, 0 and 47 8%, 17 2%, 0, respectively. Conclusions The most common risk factors of PTE in the elderly was DVT and the long term stay in bed or stay without active moving. The clinical symptoms were not only atypical but also variable. Thrombolytic with anti coagulation therapy is safe and effective, but anti platelet coagulation alone is not benefit.
7.The diagnosis and surgical treatment of colorectal injuries
Shanhong ZHAO ; Jinmou GAO ; Ping HU ; Tao AI ; Xingsen XUE
Chinese Journal of General Surgery 2014;29(2):112-114
Objective To assess early diagnosis and treatment experience of colorectal injuries.Methods We retrospectively analyzed the clinical data of 72 patients with colorectal injuries in January 2001 to December 2001.Results In this group of 72 cases,ISS score was 29 ± 18.Forty-five suffered from blunt injuries,27 cases from penetrating wounds,Peritoneal colorectal injuries in 57 cases,extraperitoneal rectal injury in 15 cases.Hemorrhagic shock existed in 28 patients at admission.69 were with multiple injuries.Diagnosis:injury tract probing in 13 cases,digital rectal inspection in 3 cases,microscopy in 1 case,the contrast examination in 2 cases,laparotomy in 53 cases.Treatment:repairment in 46 cases,injuried bowel excision anastomosis in 6 cases,18 cases underwent colostomy.5 cases died postoperatively with ISS score of 43 ± 7,among those 3 cases died of uncontrolled hemorrhagic shock,one of severe craniocerebral injury,one of postoperative SIRS and MODS.Other nonlethal postoperative complications occurred in 13% (9/67),all were cured.Conclusions Early diagnosis and emergency operation is the key to successful treatment for colorectal injuries.The indication of one stage operation should be strict and accurate.Staged operation should be adopted in cases of extra-abdominal rectal injury.
8.Mesenchymal stem cells protecting multiple organ failure
Kaixun HU ; Shifu ZHAO ; Mei GUO ; Huisheng AI
Chinese Journal of Emergency Medicine 2009;18(6):607-610
Objective The patients with lethal irradiation after sucessful hematopoietic stem cells transplan-tation had blood recovery, but did not avoid to died of multiple organ failure(MOF). To overcome the block, the article investigated mechanisms of mesenchymal stem cells (MSCs) protecting lethal radiated mice from multiple organ failure after haploid bone marrow cells transplantation. Method BALB/c mice irradiated with 8Gy60COγ-rays were randomly divided into two groups: MSCs group, infused MSCs labeled with cm-DiI and bone marrow monocytes of CB6F1 mice; Control group, only infused bone marrow monocytes; normal group, mice were infused cm-DiI marked MSCs without irradiation. The distribution of MSCs and the serous densities of Il-2, Il-10 and TNF-α in the recipients were observed after transplantation. Results MSCs collected in the bone marrow and the intes-tine in normal group at 15 d,in MSCs group MSCs enriched the different organs at 3,15 and 30 d. MSCs regulated down the secretion of IL-2 and TNF-α,and up the IL-10 density. Conclusions MSCs protected mice from multiple organ failure through above effects and may be open a new treatment strategy on acute radiation syndrome by stem cells.
9.Experimental study of MSCs promoting haploid hematopoietic stem cell transplantation in treatment for mice with acute radiation syrndrome
Kaixun HU ; Shifu ZHAO ; Mei GUO ; Huisheng AI
Chinese Journal of Radiological Medicine and Protection 2008;28(2):135-138
Objective To investigate the mechanism of mesenchymal stem cells in enhancing the effects of haploid matched bone marrow cells transplantation in mice with acute radiation syndrome(ARS).Methods The survival of mice infused with difierent levels of MSCs and bone marrow cells after 8 Gy TBl were examined.BALB/c female mice irradiated with 8 Gy of 60Co γ-rays were randomly divided into two groups,MSCs group,infused with MSCs of female CB6F1 mice labeled with cm-DiI and bone marrow monocytes of male CB6F1,Control group,only infused with bone marrow monocytes.Peripheral blood counts,T-lymphocyte subpopulation of peripheral blood cells,the sry-gene chimerism of bone marrow of the receiptors,the distribution of MSCs in the receiptors,the occurrence time of cGVHD,pathologic variety of medulla were observed.Resuits MSCs improved the survival of mice after 8 TBI,but 1.5×108/kg of MSCs increased the mortality of irradiated mice.In comparison with the control group,leukocytes and plastocytes recovered rapidly in MSCs group.Megacaryocytes in sternum marrows grew fastly in MSC group.The percent of CD3 and CD4 positive cells in the MSCs group were hisher than those in control post-transplantation.The sry-gene chimerism of bone marrow of the receiptors was higher in the MSCs group than that in the control at 30 d.The MSCs were distributed in intestine,thymus,bone marrow,liver,heart of the receiptors at 30 d.The cGVHD occurrence was 30 d later in MSCs group than that of the control.Conclusions MSCs could improve stem cell engraftment,enhance T-lymphocyte and plastocytes recevery,delay occurrence of cGVHD,repair injured organs and increase survivals.It is indicated that MSCs can enhance the treatment effects of haploid hematopoietic stem cells transplant for ARS.
10.The relationship between ultrasonographic appearance of the endometrium and steroids
Hong AI ; Haiyan HU ; Yimin YIN ; Wenqian PAN ; Wenjun MAO
Journal of Xi'an Jiaotong University(Medical Sciences) 1981;0(03):-
Objective To investigate the relationship between ultrasonographic appearance of the endometrium and steroid. Methods A total of 30 women with normal cycle were used for this study. On the day of positive urinary LH, the subjects were classified into group A, group B and group C according to Gonen's criterions of endometrial echogenic patterns. Blood samples were taken for measurement of FSH, LH, PRL, E_2, P, T levels on the third day of the cycle, the pre-ovulatory phase, and the sixth or seventh day after ovulation. Results During the early follicular phase and pre-ovulatory phase, serum E_ 2 concentration was highest in group A, then group B and lowest in group C; there was significant difference between group A and group C (P