Objective To evaluate the MRI features of erythromycin eye ointment entered into the orbital soft tissue of guinea pigs.Methods MRI was performed dynamically to observe the signal changes 1 day,1 week,2 weeks ,3 weeks and 4 weeks after erythromycin eye ointment was successfully injected into orbital soft tissue of guinea pigs ,as well as HE stainings to monitor retrob-ulbar soft tissue specimens at each time point were obtained.Results After the injection of erythromycin eye ointment 1 day,1 week,2 weeks,3 weeks and 4 weeks later,the signal intensity of erythromycin eye ointment was resemble to the surrounding soft tissue and indistinguishable on T2 WI.On T1 WI,the signal intensity of erythromycin eye ointment was higher than that of contralat-eral adipose body of orbit at 1day and 1 week,and slightly higher than the contralateral adipose body of orbit at 2 weeks and 3 weeks,but resemblance at 4 weeks.HE staining showed that inflammatory cell infiltration and tissue necrosis at 1 day,the presence of foreign body macrophages and fibroblasts at 2 weeks,and the inflammatory cells surrounding the optic nerve gradually subsided at 3 weeks and 4 weeks.Conclusion Fat-suppressed T1 WI is the best sequence to observe erythromycin eye ointment.Abnormal signal changes on T1 WI can reflect the histopathological changes after erythromycin eye ointment into the tissue.

Time to positivity(TTP) is a new parameter in blood culture field.The article shows us the concepts of TTP,differential time to positivity (DTTP),and introduces their relation with bloodstream infection (BSI),catheter-related bloodstream infection (CRBSI).Besides,it stresses TTP' s clinical application,including determining the severity of disease;identifying the isolates whether pollution or not; identification of isolate strains ; detection of the drug resistance of isolates ; evaluating the effect of antibiotic ; helping to adjust the therapeutic drug; diagnosing or excluding CRBSI by means of DTTP;deciding whether the catheter is the source of infection in patients with candidemia; understanding the epidemiological distribution of strain.At the same time,the article also describes the shortcomings and domestic current status.

Objective To study the influence of arachidonic acid (AA) on L-type calcium channel in rabbits sin-gle cardiomyocyte and its mechanism of antiarrhythmia. Method The single ventricular cardiomyocyte was isolat-ed by using enzyme dispersion method and whole-cell clamp-patch technique was used to record L-type calcium current.All data were analyzed using ANOVA. Results AA inhibited Ica-L in a concentration-dependent manner. The application of 3 μmol/L, 10 μmol/L and 20 μmol/L arachidonic acid reduced the density of peak Ica-L from (10.79±0.93)pA/pF to (8.99±0.43)pA/pF to (7.60±0.35)pA/pF and to (5.60±0.30)pA/pF, respctive-ly (n=7, P<0. O1 ). The Ica-Lpartially resumed after washout. The AA up-shifted the I-V curves of Ica-L without changes of their shape,peak and reverse potentials. The AA also markedly shifted the inactivation curve to left, and prolonged the recorvery time from inactivation,but did not change the curve of calcium channel activation. Con-clustions By acceleration of L-type calcium channel inactivation and prolongation of recorvery time from inactiva-fion,arachidonic acid can reduce the calcium ion influe and prolong effective refractory period, playing the role of antiarrhythmia.

ObjectiveTo observe the changes of artery diameters, cerebral blood flow and glutamate level in the early stage (2 h after the stimulus finished) of acute mechanical middle cerebral artery (MCA) vasospasm in cats. MethodsThe right MCA was persistently mechanically stimulated using a small smooth stainless steel nail in the field across the olfactory tract for 30 min. The diameter of MCA was recorded with metrical ocular of microscope. The changes of the perfusion index of brain tissue were observed through the Laser Doppler flowmetry monitor fixed on the skull. The level of glutamate were investigated through high performance liquid chromatography. ResultsThe diameter of MCA decreased to 68.8% of normal. 2 h later, the diameter of MCA recovered. The perfusion index of the cortex surface decreased to 42.6% of normal and up to 63.8% 2 h later. The level of glutamate raised about 40 times of normal and maintained a high level 2 h after the mechanical stimulus. ConclusionThe persistent mechanical stimulus can cause acute cerebral vasospasm. Reduce of cerebral blood flow and raise of excitatory amino acids were observed in the early stage of acute mechanical vasospasm.

Objective:To investigate the effects of Chlamydia pneumoniae(Cpn) on SR-A1 and CD36 expression in THP-1-derived macrophages and role of c-Jun NH_2-terminal signal transduction pathway in the process.Methods:Cpn was propagated in Hep-2 cells.THP-1 monocytes were induced into macrophages by 160 nmol/L phorbol myristate acetate(PMA)for 48h,and were randomly allocated into four groups to be incubated continually: control group;Cpn infection group;Cpn and SP600125(a JNK inhibiter)group and SP600125 group.Lipid droplets in cytoplasm were observed by oil red O staining.The contents of intracellular cholesterol ester were detected by enzyme-fluorescence.The expression of SR-A1 and CD36mRNA and protein were determined by RT-PCR and Western blot, respectively. Results:THP-1-derived macrophages infected with Cpn resulted in large accumulation of lipid droplets and foam cell formation when co-cultured with LDL.Meanwhile,the expression of SR-A1 mRNA and protein were up-regulated by Cpn infection (P<0.05).However,the expressions of CD36 mRNA and protein in THP-1-derived macrophages infected with Cpn were unchanged.Moreover,the up-regulation of SR-A1 and foam cell formation induced by Cpn could be restrained by the JNK inhibiter SP600125 in a dose-dependent manner,and SP600125 had little impact on the expression of CD36 in THP-1-derived macrophages infected with Cpn.Conclusion:The up-regulation of SR-A1 but not CD36 expression is involved in mechanisms of Cpn inducing foam cell formation.And Chlamydia pneumoniae up-regulates the expression of SR-A1 via the JNK signal transduction pathway.This may be a novel mechanism for the foam cell formation induced by Cpn.

AIM: To investigate the signal transduction mechanism of Chlamydia pneumoniae (Cpn) in down-regulating the expression of ATP binding cassette A1 (ABCA1) and ATP binding cassette G1 (ABCG1),the key molecules in cholesterol efflux and atherogenesis,from THP-1-derived macrophages. METHODS: Cpn was propagated in Hep-2 cells. THP-1 monocytes were induced into macrophages by 160 nmol/L phorbol myristate acetate (PMA) for 48 h,and were randomly allocated into 4 groups to incubate continually: control group,50 mg/L low density lipoprotein (LDL); Cpn infection group,Cpn (1×10~6 IFU) and 50 mg/L LDL; Cpn and SP600125 (a special JNK inhibiter) group,THP-1 macrophages were previously treated with different concentrations (1-20 μmol/L) of SP600125 for 1 h,and then infected with Cpn (1×10~6 IFU) and 50 mg/L LDL; SP600125 group,SP600125(20 μmol/L)and 50 mg/L LDL. The expressions of ABCA1/ABCG1 and peroxisome proliferator-activated receptor γ (PPARγ) from each group were detected then. The cholesterol efflux was detected by enzyme-fluorescence. The expressions of ABCA1/ABCG1 and PPARγ mRNA and protein were determined by RT-PCR and Western blotting,respectively. RESULTS: Cpn not only down-regulated the ABCA1/ABCG1 expression,but also down-regulated the expression of PPARγ,which regulated the ABCA1/ABCG1 genes transcriptions. However,the mentioned effects of Cpn infection were restrained by the special JNK inhibitor SP600125 in a dose-dependent manner. CONCLUSION: Chlamydia pneumoniae may down-regulate ABCA1/ABCG1 expression from THP-1-derived macrophages via JNK-PPARγ signal transduction pathway.

Objective To investigate the role of c-Jun N-terminal kinase (JNK) signal transduction pathway on the up-regulation of the expression of acyl-coenzyme A: cholesterol acyltransferasel (ACAT1) induced by Chlamydia pneumoniae (C. pn), and to discuss the mechanism of macrophages-derived foam cell formation induced by C. pn. Methods C. pn was propagated in Hep-2 cells. THP-1 monocytes were induced into macrophages by 160 nmol/L phorbol myristate acetate(PMA) for 48 h, and were randomly allocated into four groups to be incubated continually: control group, C. pn infection group, C. pn and SP600125 (a special JNK inhibitor)group and SP600125 group. Lipid droplets in cytoplasm were observed by oil red O staining. The contents of intracellular cholesterol ester were detected by enzyme fluorescence analysis. The expressions of ACAT1 mRNA and protein were determined by reverse transcriptase polymerase chain reaction(RT-PCR) and Western blot, respectively. Results Compared with the control group, the expressions of ACAT1 mRNA and protein were up-regulated in C. pn infection group [(4.16±0.26) vs. (2.17±0.18), (1.20±0.10)vs. (0.61±0.03), both P<0.05], and C. pn-induced foam cell formation was observed. The expressions of ACAT1 mRNA and protein and the foam cell formation were inhibited by SP600125 in a concentration-dependent manner (r = - 0.92, P<0.05; r= - 0. 96, P<0.05, respectively). Conclusions The up-regulation of ACAT1 expression is induced by C. pn via JNK signal transduction pathway, which is involved in the mechanism of C. pn-induced macrophage-derived foam cell formation.

OBJECTIVE: To investigate the effects of scalp-acupuncture on intelligence in patients with vascular dementia (VaD). METHODS: A total of 108 VaD patients were randomly divided into two groups: scalp-acupuncture group and Western medicine group. The scores of Mini-Mental State Examination (MMSE), Blesse Dementia Scale (BDS), Hasegawa Dementia Scale (HDS), Abilities of Daily Life (ADL) before and after treatment in the two groups were detected. RESULTS: A total of 92 patients completed the treatment. The scores of MMSE, BDS and HDS in the two groups were significantly increased, and the ADL scores significantly declined (P<0.05). There was no difference in the scores of MMSE, BDS, HDS and ADL between the two groups before and after the treatment. There was no difference in the total effectiveness between the two groups (P>0.05). CONCLUSION: Scalp-acupuncture therapy could improve the clinical intelligence level of VaD patients.

AIM:To investigate the synergistic anti-proliferation effect of aspirin and 5-fluorouracil on the co-lon cancer cells and its mechanism .METHODS: Colon cancer cells were divided into 4 groups: control group , aspirin group, 5-fluorouracil group and aspirin +5-fluorouracil group .Synergistic anti-proliferation effect of aspirin and 5-fluoroura-cil on the colon cancer cells was observed by MTT assay .Apoptosis-inducing effect and mechanism were detected by Hoechst 33258 staining, caspase activity assay and flow cytometry analysis .The mRNA and protein levels of apoptosis-re-lated proteins were evaluated by real-time PCR and Western blotting .RESULTS:5-Fluorouracil inhibited proliferation of HCT116 and SW620 colon cancer cells effectively , and low concentration of aspirin exerted synergistic inhibitory effect .5-Fluorouracil induced apoptotic morphology and increased caspase activity and sub -G1 phase in HCT116 cells.The synergis-tic effect of aspirin obviously enhanced apoptotic ratio and caspase activity .Moreover , 5-fluorouracil inhibited the mRNA and protein expression of Bcl-2, which was amplified by low concentration of aspirin .CONCLUSION:Aspirin and 5-flu-orouracil had a synergistic anti-proliferation effect on the colon cancer cells through apoptosis pathway .

Objective To investigate the clinical features of gynecological malignant tumor related multiple primary malignant neoplasms (MPMN).Methods Apply retrospective and comprehensive analysis to the clinical data of 30 patients with gynecological malignant tumor related MPMN.Results Synchronous MPMN were found in 9 patients.Their average age was 50.2 years old and their median age was 49 years old.The neoplasms were located at ovary,uterus,cervix,breast and intestine.Metachronous MPMN were found in 21 patients.Their average age was 57.7 and their median age was 57 years old.The median interval between the first and the second primary malignant neoplasm was 4.0 years.The neoplasms were located at breast,ovary,uterus,gastrointestinal tract,uterine cervix,lung etc.In 30 cases,26 of them were treated by surgical operation and further adjunctive treatment of chemotherapy and (or) radiotherapy was conducted as per the neoplasm staging and its pathological results.The rest 4 patients (first primary malignant neoplasms were excised from 3 of them and another one was not treated by surgical operation) received adjunctive treatment of chemotherapy and (or) radiotherapy.Followed ups,which varied from 6 to 60 months,were made to 29 patients and 20 out of the 29 were alive.5-year survival rate of patients with gynecological malignant tumor related MPMN was 47.8％,2-year survival rate was 73.9％,and 1-year survival rate was 88.6％.Conclusion Pay more attention to the patients with gynecological malignant tumor related MPMN,examine the high-risk patients with malignant tumor comprehensively,identify whether it is recurrence,metastasis or new growth of malignant neoplasm,and further ensure early diagnosis and proper treatment,avoiding misdiagnosis and missed diagnosis.