Progress in controlled ocular anti-VEGF drug release delivery system / 中华实验眼科杂志

Neovascularization is the hallmark of many fundus diseases, including diabetic retinopathy, retinal vein occlusion and neovascular age-related macular degeneration.More and more evidence suggests that vascular endothelial growth factor (VEGF) plays a critical role in neovascularization.Anti-VEGF drugs are the first-line treatment for neovascular fundus diseases and have achieved significant results.However, there are drawbacks such as short drug half-lives and the need for long-term administration to maintain effective concentrations, which increases the economic burden and medical risk for patients and reduces compliance.Therefore, finding a new method for intraocular drug delivery is of great clinical importance.Based on the principle that diabetes patients use insulin pumps to gradually release drugs, the ocular anti-VEGF drug delivery system can continuously release anti-VEGF drugs over a period of time, significantly reducing the injection frequency and improving patient compliance.At present, the research on ocular anti-VEGF drug delivery systems is still immature, and various systems are in different stages of clinical trials.According to different design principles, they can be divided into three categories with their characteristics, micropump (extraocular storage delivery systems), biodegradable implants, and non-biodegradable implants.This article summarized and analyzed the controlled ocular anti-VEGF drug release delivery systems currently in clinical trials.

Therapeutic effect of small extracellular vesicles derived from mesenchymal stem cells on retinal light injury and its mechanism / 中华实验眼科杂志

Objective:To investigate the effect of small extracellular vesicles (sEVs) derived from mesenchymal stem cells (MSCs) in mouse model of retinal light injury and the possible mechanism.Methods:Human umbilical cord derived MSCs were identified by flow cytometry.Supernatants of passage 3-5 MSCs were collected.sEVs were harvested by ultracentrifugation and were identified by transmission electron microscopy.Sixty-five healthy female SPF-grade BALB/c mice aged 8-10 weeks were randomly divided into normal group (17 mice), phosphate buffered saline (PBS) group (24 mice) and sEVs group (24 mice). Mice in PBS and sEVs groups were intravitreally injected with 2 μl of PBS and sEVs, respectively, and were exposed to 930 lx blue light for 6 hours.No intervention was administered to the normal group.Three days after lighting, mice retinal structure was observed by hematoxylin-eosin staining.Apoptotic retinal cells were detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL). Retinal function was tested by electroretinogram.Differentially expressed mRNAs between PBS group and sEVs group were assayed by mRNA transcriptome sequencing and were analyzed through KEGG cluster analysis.The differential mRNAs were verified via real-time quantitative PCR.The study protocol was approved by the Animal Ethics Committee of Tianjin Medical University Eye Hospital (No.TJYY20201221035).Results:MSCs were positive for CD90 and CD105, negative for CD34 and CD45.The extracted MSC-sEVs showed a bilayer membrane vesicle with a diameter of 80-140 nm.Hematoxylin-eosin staining showed the arrangement of photoreceptor nuclei was disordered in outer nuclear layer in PBS group.The disorder of photoreceptor nuclei arrangement of sEVs group was slighter than that of PBS group.The apoptotic cell number of sEVs group was (14.60±4.04)/visual field, which was lower than (24.00±8.52)/visual field of PBS group, with a statistically significant difference ( t=2.37, P<0.05). The a-wave amplitude of sEVs group was (64.38±16.70)μV, which was higher than (16.78±6.37) μV of PBS group, showing a statistically significant difference ( P<0.05). The b-wave amplitudes of PBS and sEVs groups were (132.40±39.41) μV and (154.86±34.08) μV, respectively, which were lower than (338.38±27.41) μV of normal group, and the differences were statistically significant (both at P<0.05). A total of 110 differentially expressed mRNAs were detected.There were 109 downregulated mRNAs in sEVs group.Differentially expressed mRNAs were mainly inflammation- and immune-related pathways.PCR showed that the expression level of C-C motif chemokine ligand 2, C-C motif chemokine receptor 2, leukotriene B4, leukocyte Ig-like receptor A6 and interleukin-1β in sEVs group were significantly decreased in comparison with PBS group (all at P<0.05). Conclusions:MSC-sEVs can ameliorate blue light-induced retinal structural and functional damage.The protective effect may be achieved through inhibiting inflammatory response.

Seven new 3,4-dihydro-furanocoumarin derivatives from Angelica dahurica / 中草药·英文版

OBJECTIVE@#To study the chemical constituents of the roots of Angelica dahurica, a well-known Chinese herbal medicine named Baizhi in Chinese.@*METHODS@#Compounds were separated by various chromatographies, and the structures of new compounds were elucidated based on the analysis of their spectroscopic and spectrometric data (1D, 2D NMR, HRESI MS, IR, and UV). The absolute configurations of new compounds were determined by the calculated electronic circular dichroism and chemical derivatization. The inhibitory activities of all isolates against nitric oxide (NO) production were evaluated using lipopolysaccharide-activated RAW 264.7 macrophage cells.@*RESULTS@#Seven new 3,4-dihydro-furanocoumarin derivatives ( 1a/ 1b, 2a/ 2b, 3a/ 3b, 4) together with a known furanocoumarin ( 5) were isolated from the roots of A. dahurica. The new compounds included three pairs of enantiomers, (4S, 2''R)-angelicadin A ( 1a)/(4R, 2''S)-angelicadin A ( 1b), (4S, 2''S)-angelicadin A ( 2a)/(4R, 2''R)-angelicadin A ( 2b), and (4S, 2''S)-secoangelicadin A ( 3a)/(4R, 2''R)-secoangelicadin A ( 3b), together with (4R, 2''R)-secoangelicadin A methyl ester ( 4). The known xanthotoxol ( 5) inhibited the NO production with the half-maximal inhibitory concentration (IC50) value of (32.8 ± 0.8) µmol/L, but all the new compounds showed no inhibitory activities at the concentration of 100 µmol/L.@*CONCLUSION@#This is the first report of the discovery of 3,4-dihydro-furanocoumarins from A. dahurica. The results are not only meaningful for the understanding of the chemical constituents of A. dahurica, but also enrich the reservoir of natural products.

Sperm retrieval rate of microdissection testicular sperm extraction in patients with non-obstructive azoospermia based on different causes / 现代泌尿外科杂志

【Objective】 To investigate the sperm retrieval rate (SRR) of microdissection testicular sperm extraction (M-TESE) in patients with non-obstructive azoospermia (NOA) caused by different causes. 【Methods】 A retrospective analysis was performed on 225 NOA patients during Jan.2020 and Dec.2022. The relation between SRR and patients’ age,body mass index (BMI),testicular volume,endocrine hormones and different etiological classifications were analyzed. 【Results】 According to whether sperm was obtained by surgery,the patients were divided into two groups,including 107 cases in the sperm group and 118 cases in the non-sperm group. There were no significant differences in patients’ age,testicular volume and levels of endocrine hormones between the two groups (P>0.05). According to the different causes,NOA patients with mumps history,cryptorchidism history,AZFc deletion or Klinefelter syndrome (KS) had higher SRR,while idiopathic NOA patients had the lowest SRR (P<0.05). 【Conclusion】 M-TESE is an effective treatment of NOA. There is no correlation between SRR and patients’ age,MBI,testicular volume and levels of endocrine hormones. NOA caused by different etiological classifications may have different SRR.

Single-molecule imaging reveals stoichiometry of vascular endothelial growth factor receptor 2 in retinal vascular endothelial cells / 中华眼底病杂志

Objective:To observe the stoichiometry of vascular endothelial growth factor receptor 2 (VEGFR2) on the retinal vascular endothelial cell membrane by single-molecule fluorescence imaging.Methods:Rhesus monkey retinal vascular endothelial cells (RF/6A) were divided into blank control group (normal culture) and plasmid transfection group [transfected with VEGFR2-green fluorescent protein (GFP) recombinant plasmid]. The expression of GFP in the plasmid transfected group was observed by confocal microscope, and the expression of VEGFR2 in the cells was detected by real-time fluorescent quantitative polymerase chain reaction (qPCR) and Western blot. The fluorescence intensity distribution and bleaching steps of single VEGFR2-GFP molecule on the cell membrane were recorded by single-molecule imaging. The distribution of fluorescence intensity and the number of fluorescence bleaching steps of GFP were recorded.Results:GFP green fluorescence was observed in the transfected cells 12 hours after transfection. qPCR results showed that the expression of VEGFR2 and GFP mRNA in the plasmid transfected group was significantly higher than that in the blank control group ( t=11.240, 12.330; P<0.001, 0.001). Western blot results showed that the expression of VEGFR2 protein in the plasmid transfected group was significantly higher than that in the blank control group ( t=8.346, P<0.01). The results of single-molecule imaging showed that the fluorescence intensity distribution of VEGFR2-GFP on the surface of RF/6A cell membrane without ligand stimulation was bimodal, in which monomer and dimer were 86.0% and 14.0% respectively. By counting the steps of GFP fluorescence bleaching, the proportions of receptor monomer, dimer, trimer, and tetramer were 81.4%, 12.9%, 5.5%, and 0.3% respectively. Conclusion:In the absence of ligands, VEGFR2 coexists in the form of monomers and dimers on the surface of RF/6A cell membrane, and monomers are dominant.

Research progress of anti-vascular endothelial growth factor receptor 2 drugs in the treatment of retinal neovascularization disease / 中华眼底病杂志

Neovascularization is a characteristic manifestation of a variety of retinal diseases. Vascular endothelial growth factor (VEGF) mainly regulates the proliferation and migration of endothelial cells. VEGF receptor 2 (VEGFR2) is the main receptor to mediate this effect. The activation of downstream signals requires the binding of VEGF and VEGFR2, followed by receptor dimerization and autophosphorylation. Blocking this process and inhibiting neovascularization is very attractive treatment ideas. Monoclonal antibodies and fusion protein drugs currently used in ophthalmology can bind free VEGF. In addition, there are also macromolecular antibodies binding VEGFR2 and small molecule tyrosine kinase inhibitors, which is expected to further expand into the field of ophthalmology. Although anti-VEGFR2 therapy is a revolutionary method to inhibit neovascularization, there are no sufficient clinical evidences at present. In-depth understanding of the application status and progress of anti-VEGFR2 in the treatment of retinal neovascular diseases has important clinical significance.

Effects of Active Components of Naoxintong Capsule on the Proliferation of HUVEC and Its JAK/STAT Signal Pathway，Vasoactive Substances ，Adhesion Molecules and Inflammatory Factors / 中国药房

OBJECTIVE：To study the effects of the main active components of Naoxintong capsule （NXTC）on the proliferation of human umbilical vein endothelial cell（HUVEC） and its key protein JAK/STAT signal pathway ， vasoactive substances ，adhesion molecules and inflammatory factors so as to clarify the m echanism of NXTC for promoting blood circulation and removing blood stasis. METHODS ：The effects of different concentration of 12 active components [caffeic acid（1.56-200 μmol/L），ferulic acid （1.56-200 μmol/L），senkyunolide H （3.125-200 μmol/L），n-butylidenephthalide（3.125-200 μmol/L），ligustilide（1.56-200 μmol/L），cryptotanshinone（0.625-80 μmol/L），tanshinol sodium （1.56-200 μmol/L），paeoniflorin （1.56-200 μmol/L），formononetin（1.56-200 μmol/L），salvianolic acid B （1.56-200 μmol/L），catechin（1.56-200 μmol/L）and astragaloside Ⅳ（1.56-200 μmol/L）] on the proliferation of HUVECs were evaluated by CCK- 8 assay. The effects of above active components（3 dose groups ，setting up 0 μmol/L blank control group，hereinafter）on mRNA expression of key proteins JAK 2， STAT3，Akt，ERK in JAK/STAT signal pathway were measured by RT-PCR. The effects of each active component on the expression of PAI- 1，VCAM-1，ICAM-1，VEGF and NF-κB p65 were detected by ELISA. RESULTS ：Ferulic acid （6.25，25-200 μg/mL），senkyunolide H （6.25-200 μmol/L），ligustilide（200 μmol/L），cryptotanshinone（10-80 μmol/L），paeoniflorin（1.56， 6.25，12.5 μmol/L），salvianolic acid B （1.56-12.5 μmol/L，200 μmol/L）and catechin （25 μmol/L）could significantly inhibit the proliferation of HUVECs ；caffeic acid （1.56，12.5 μmol/L），ligustilide（50 μmol/L），trashinol sodium （6.25 μmol/L）and paeoniflorin（1.56，100，200 μmol/L）could significantly promote the proliferation of HUVECs （P＜0.05 or P＜0.01）. Compared with blank control group ，mRNA expression of JAK 2，STAT3 and Akt were decreased significantly in some dose groups of ferulic acid，formononetin，salvianolic acid B and astragaloside Ⅳ（P＜0.05 or P＜0.01）；the expression of PAI- 1 were significantly decreased in some dose groups of caffeic acid ，ferulic acid and n-butylphthalide；the expression of ICAM- 1 and VCAM- 1 were decreased significantly in some dose groups of caffeic acid ，ferulic acid ，n-butenylphthalide，cryptotanshinone，formononetin and catechin；the expression of NF-κB p65 were decreased significantly in some dose groups of ferulic acid ，n-butenylphthalide， formononetin，salvianolic acid B and astragaloside Ⅳ；the expression of VEGF were increased significantly in some dose groups of caffeic acid and catechin （P＜0.05 or P＜0.01）. CONCLUSIONS ：The active components of Naoxintong capsule may play the role of promoting blood circulation and removing blood stasis by inhibiting the expression of JAK/STAT signal pathway key protein mRNA and PAI- 1，ICAM-1，VCAM-1，NF-κB p65 in HUVEC ，and promoting the expression of VEGF.

Antiviral effects of Bovine antimicrobial peptide against TGEV in vivo and in vitro

Background@#In suckling piglets, transmissible gastroenteritis virus (TGEV) causes lethal diarrhea accompanied by high infection and mortality rates, leading to considerable economic losses. This study explored methods of preventing or inhibiting their production.Bovine antimicrobial peptide-13 (APB-13) has antibacterial, antiviral, and immune functions. @*Objectives@#This study analyzed the efficacy of APB-13 against TGEV through in vivo and in vitro experiments. @*Methods@#The effects of APB-13 toxicity and virus inhibition rate on swine testicular (ST) cells were detected using 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT). The impact of APB-13 on virus replication was examined through the 50% tissue culture infective dose (TCID50 ). The mRNA and protein levels were investigated by real-time quantitative polymerase chain reaction and western blot (WB). Tissue sections were used to detect intestinal morphological development. @*Results@#The safe and effective concentration range of APB-13 on ST cells ranged from 0 to 62.5 µg/mL, and the highest viral inhibitory rate of APB-13 was 74.1%. The log10 TCID50 of 62.5 µg/mL APB-13 was 3.63 lower than that of the virus control. The mRNA and protein expression at 62.5 µg/mL APB-13 was significantly lower than that of the virus control at 24 hpi. Piglets in the APB-13 group showed significantly lower viral shedding than that in the virus control group, and the pathological tissue sections of the jejunum morphology revealed significant differences between the groups. @*Conclusions@#APB-13 exhibited good antiviral effects on TGEV invivo and in vitro.

Application and research progress of optogenetic technology in retinal diseases / 中华实验眼科杂志

Optogenetics is a technique combining optics and the power of light with genetics; it uses light-mediated protein-protein interactions to control the open/closed state of channels or the activation/inactivation states of signaling components within live cells.Recently developed optogenetic tools offer exciting opportunities by enabling signaling regulation with superior temporal and spatial resolution.The eye is a light-bioelectric conversion system.Compared with diseases of other organs, there are great advantages to apply optogenetics to the treatment of ophthalmic conditions, as new optical genetic tools are rapidly emerging.This article will focus on the main methods of optogenetic control of cells and the current status and outlook of its application in retinal diseases.

Investigation of prevalence and risk factors of depression in patients with acute ST-segment elevation myocardial infarction after percutaneous coronary intervention / 中国基层医药

Objective:To investigate the prevalence and risk factors of depression in patients with acute ST-segment elevation myocardial infarction(STEMI) after percutaneous coronary intervention(PCI).Methods:From January 2019 to December 2019, 205 patients with STEMI who underwent PCI were selected randomly in Department of Cardiology of Heilongjiang Provincial Hospital.And 200 health examined people from our hospital at the same time were selected as health control group.The Zung self-rating depression scale(SDS) was used to score the depression in STEMI patients one week after PCI.The social demographic data were investigated, including age, gender, education status, place of residence, medical payments, monthly income, marital status, smoking history, drinking history, diabetic history, cardiovascular and cerebrovascular diseases history.The clinical indicators were measured, including height, weight, waist circumference(WC), hip circumference(HC), body mass index(BMI), waist-hip rate(WHR), fasting plasma glucose(FPG), fasting serum insulin(FINS), homeostasis model assessment-insulin resistance index(HOMA-IR), serum total cholesterol(TC), total triglyceride(TG), low density lipoprotein-C(LDL-C), high density lipoprotein-C, (HDL-C), systolic blood pressure(SBP) and diastolic blood pressure(DBP).Results:The prevalence of depression in the STEMI group was obviously higher than that in the control group(17.07% vs.9.50%, χ 2=5.025, P=0.025). There was statistically significant difference in the severity of depression between the two groups(χ 2=8.360, P=0.039). Multivariate Logistic regression analysis showed that the risk factors for depression in order of OR values were FPG, gender(female), age(65 or old), BMI, monthly income(<5 000 RMB), HOMA-IR, self-paying for medical services ( OR=1.894, 1.812, 1.545, 1.428, 1.335, 1.285, 1.202). Conclusion:The prevalence of depression in STEMI patients after PCI is increased.The risk factors for depression include female, old age, obesity, low income, insulin resistance and self-paying for medical services.

miR-191 inhibits oxygen-induced retinal neovascularization in mice / 中华眼底病杂志

Objective To observe the inhibitory effect of lentiviral vector miR-191 (LV-191) on retinal neovascularization (RNV) in mice model of oxygen-induced retinopathy (OIR).Methods Eighty healthy 7-day-old C57BL/6J mice were randomly divided into 5 groups including normal group, non-intervention group, normal saline (NS) group, LV-191 group and LV-green fluorescent protein (GFP) group, 16 mice in each group. The OIR model was established in the non-intervention group, NS group, LV-191 group and LV-GFP group. NS group, LV-191 group and LV-GFP group were given an intravitreal injection of 1 μl of NS, LV-191 and LV-GFP at the age of 12 days. No injection was performed in the non-intervention group. In normal group,newborn mouse were maintained in room air form P0 to P17, and no treatment was performed. Mice in all five groups were euthanized at P17. Retinal neovasculation (RNV) was evaluated by counting the number of pre-retinal neovascular cells and analysis of non-perfusion area area by immunofluorescent staining of the mouse retina. Real-time quantitative PCR (RT-PCR) to detect miR -191 and P21 expression of retinal tissue.Results In the LV-191 group, the non-perfusion area were both significantly smaller than those in non-intervention group, NS group and LV-GFP group (F=127.20,P<0.001). The number of pre-retinal neovascular cell nuclei in retinas from LV-191 group were obviously lower than those in the retinas from non-intervention group, NS group and LV-GFP group (F=31.71,P<0.05). RT-PCR showed that the LV-191 and P21 level of LV-191 group increased significantly than other groups (F=10.95, 15.60;P<0.05).Conclusion Intravitreal injection of LV-191 inhibits RNV in mice model of OIR possibly through up-regulating p21.

Effect of matrine on Calpain/MAP-2 of experimental autoimmune encephalomyelitic rats / 中国基层医药

Objective To study the effect of matrine on Calpain and MAP-2 in rats with experimental autoimmune encephalomyelitis(EAE).Methods In accordance with the random number table ,60 Wistar rats were divided into 6 groups randomly: normal group,model group,dexamethasone(DEX)-treated group(1mg/kg),high-dose matrine(MAT)-treated group(250mg/kg),middle-dose MAT-treated group(200mg/kg) and low-dose MAT-treated group(150mg/kg).The EAE models were induced by immunized spinal cord extracts of guinea pig with complete Freunds'adjuvant.Rats of three MAT-treated groups and DEX-treated group were injected intraper-itoneally with MAT and DEX daily for 16 days respectively,whereas rats of normal group and model group were injected intraperitoneally with normal saline.Clinical signs of rats in six groups were observed daily .Hematoxylin-eosin (HE) was used to analyze histopathological evaluation of spinal cord .μ-Calpain,m-Calpain and MAP-2 in spinal cord were determined using RT-PCR and immunohistochemistry respectively .Results Compared with the model group[(2.85 ±0.78)points],the clinical scores were significantly decreased in high-dose-MAT group[(1.28 ± 0.59) points], middle-dose-MAT group [(1.45 ±0.64) points] and low-dose-MAT group [(2.09 ± 0.71)points](t =5.345,4.314,2.869,all P <0.05).The HE score of rats in model group[(2.49 ±0.29)points] was significantly higher than that in high-dose-MAT group[(1.04 ±0.26) points],middle-dose-MAT group [(1.29 ±0.20) points] and low-dose-MAT group[(1.77 ±0.24)points] (t =5.185,4.274,3.629,all P <0.01).The levels of μ-Calpain mRNA and m-Calpain mRNA in the three MAT-treated groups were significantly lower than those in model group(t =10.656,9.418,7.044,all P <0.01;t =6.332,5.416,3.978,all P <0.01).In addition,the expression of MAP-2 in the spinal cord of EAE rats showed a marked elevation after MAT treatment (t =12.841,9.924,7.038,all P <0.01).Conclusion Matrine may be an effective therapeutic approach for EAE by inhibiting Calpain and increase MAP-2 expression.

Extended resection, gland reconstruction and mammary gland lavage-a new attempt to treat mammary duct expansion / 中华内分泌外科杂志

Objective To study the safety and availability of extended resection,gland reconstruction and mammary gland lavage in treatment of mammary duct expansion.Methods 41 patients with duct expansion admitted from Mar.2012 to Jan.2015 were studied and they were randomly divided into two groups.15 patients in the control group received normal surgical treatment,and 26 patients in the observation group received extended resection,gland reconstruction and mammary gland lavage treatment.Results The operation time,intraoperatve blood loss,length of hospital stay and degree of satisfaction of the observation group were superior to those of the control group while the recurrence rate was lower than that of control group.The gland expanded resection reduced the recurrence rate,the shape of the breast was improved,and the continuous irrigation was the guarantee for the immediate formation of the gland.The three kinds of surgical procedures were organically combined and complement each other.Conclusion The surgical methord of extended resection,gland reconstruction and mammary gland lavage is worth of further exploring due to its advantages of easy to operate,good cosmetic effect and low recurrence rate.

Inhibitory effects of atractylenolide 3 on platelet and its mechanism / 国际药学研究杂志

Objective To study the effects of atractylenolide 3 on human platelet in vitro and explore the underlying mecha?nism. Methods The effects of atractylenolide 3 on human platelet aggregation induced by thrombus alkane analogues(U46619)was tested by turbidimetry in vitro. ATP secretion weas detected by luciferase detection,and the phosphorylation levels of Erk and Akt were detected by Western blotting. Results Atractylenolide 3 diminished U46619-induced human platelet aggregation in concentra?tion dependence. Compared with DMSO control group,the inhibitory rate were significant increased in each experiment group(P<0.01). Atractylenolide 3 inhibited adenosine triphosphate(ATP)secreted by human platclet in concentration dependence. Compared with the DMSO control group,the inhibitory rate were significant increased in each experiment group(P<0.01),and the levels of phospho-Akt(Ser473)and phospho-Erk1/2 were significant downregulated in the presence of atractylenolide 3 in each experiment group(P<0.01). Conclusion Atractylenolide 3 exhibits a concentration-dependent inhibitory effect on human platelet aggregation and secretion induced by U46619. Also,it regulated the MAPK and PI3K-Akt signaling pathways. These results show that atractyleno?lide 3 is an effective antiplatelet compound,may serve as new antithrombotic drugs.

Construction and characterization of invasion protein B gene deleted mutant asd host-vector balanced lethal system / 中国免疫学杂志

Objective: To develop an oral live vaccine vector which stably carries exogenous genes.Methods:SL1344ΔsipBΔasd host-vector balanced lethal system was constructed by the method of recombinant suicide plasmid-mediated allelic exchange on the basis of attenuated Salmonella typhinurium SL1344ΔsipB.Then,the biological characteristics of SL1344ΔsipBΔasd was analyzed.Results:The results showed that the mutant was stabile with the Δasd gene in vitro;the serotype and growth rate of SL1344ΔsipBΔasd strain was almost same as the parent SL1344ΔsipB and SL1344 strain.And the mutant strains remain swim ming zones.Virulence test in mice showed that the virulence of SL1344ΔsipBΔasd which carried complementary plasmid pYA3493 by electro-transformation decreased by 1.4%compared with SL1344.Conclusion: These results showed that the SL1344ΔsipBΔasd mutant was successfully constructed.It is likely that this mutant should be used as a live vector to express foreign genes.

Right heart remodeling and right heart function change after pulmonary resection evaluated by echocar-diography / 心血管康复医学杂志

Objective:To evaluate right heart remodeling and right heart function change after pulmonary resection by echocardiography (ECG) .Methods:A total of 50 patients undergoing pneumonectomy received ECG examination to evaluate right ventricular structure and right heart function change before and after partial pulmonary resection .Re-sults:(1) Compared with before operation , there were no significant changes in right ventricular anterior free wall thickness ,right ventricular ejection fraction on 7d and 30d after operation;(2) Compared with before treatment , there were significant rise in pulmonary artery systolic pressure [PASP ,(20.52 ± 2.46) mmHg vs .(49.65 ± 2.17) mmHg] ,pulmonary artery diastolic pressure [PADP ,(10.82 ± 2.04) mmHg vs .(21.93 ± 1.26) mmHg] and pul-monary artery mean pressure [PAMP ,(13.78 ± 3.67) mmHg vs .(26.67 ± 3.28) mmHg] ,and significant rise in pulmonary vascular resistance [PVR ,(187.69 ± 12.46) dyn .s .cm-1 vs .(368.72 ± 11.94) dyn .s .cm-1 ] on 7d after pulmonary resection , P<0.05 all;all above indexes recovered to normal on 30d after treatment ;(3) Com-pared with before operation ,right ventricular Tei index significantly rose [ (0.36 ± 0.05) vs .(0.69 ± 0.13) , P=0.04] on 7d after operation ,the Tei index recovered to normal on 30d after treatment ,P=0.20. Conclusion:Com-pared with before operation , the PASP ,PADP and PAMP significantly rise on 7d after operation ,they recover to normal on 30d after treatment ;there are no significant change in right ventricular structure .

Expression of PiC in SD rats with myocardial damage induced by adriamycin and protective effect of curcumin / 中国生化药物杂志

Objective To discuss the expression of mitochondrial phosphate carrier (PiC) in myocardial injury caused by doxorubicin, and the protective mechanism of curcumin in myocardial injury caused by doxorubicin .Methods 60 adult SD rats were randomly divided into three groups:control group, doxorubicin group, curcumin+doxorubicin group.Control group was injected 0.9% sodium chloride injection (2.5 mL/kg) by rat tail vein injection, one times per week, 6 times in total.Doxorubicin group was injected with 0.5 mg/mL doxorubicin which diluted with 0.9% sodium chloride injection by rat tail vein injection, and the dosage was 1.25 mg/kg(about 0.5 mL).Curcumin+doxorubicin group was injected the same dose doxorubicin as doxorubicin group.After that, 12 mg/mL curcumin injection was added with 30mg/kg by rat tail vein injection.one times per week, 6 times in total.The glutathione peroxidase (Gpx) assay kit, superoxide dismutase (SOD) assay kit and malondialdehyde (MDA) detection kits were used to test the oxidative stress levels in myocardial cells of SD rats.Flow cytometry is used to test the SD rat cardiomyocytes transferred level. Application of Western blot and Real-time PCR technology were used to detect expression of PiC.ResuIts The Gpx activity and SOD vitality in myocardial cells of SD rats in curcumin with doxorubicin group all significantly increased compare with those of doxorubicin group, and all decreased compare with those of control group.But the rate of myocardial apoptosis, content of malondialdehyde and expression of Slc25a3 gene and PiC protein from myocardial cells of SD rats from curcumin with doxorubicin group all significantly increased compare with those of control group , and all decreased compare with those of doxorubicin group.ConcIusion Doxorubicin could increase the expression of PiC in myocardial mitochondria, the levels of oxidative stress, and the apoptosis of myocardial cells, and the effect of curcumin could be effective against the injury induced by doxorubicin .

Effect of small interfering RNA targeting p63 on the proliferation and invasiveness of human cholangiocarcinoma cells in vitro / 南方医科大学学报

<p><b>OBJECTIVE</b>To construct a small interfering RNA (siRNA) vector targeting p63 and observe its effect on the proliferation and invasiveness of human cholangiocarcinoma cells in vitro.</p><p><b>METHODS</b>Real-time PCR was used to examine the expression of p63 in human cholangiocarcinoma QBC939 cells. The recombinant lentivirus shRNA-p63 vector was constructed and transfected into QBC939 cells via Lipofectamine 2000 to establish a cholangiocarcinoma cell line with stable expression of siRNA-p63. The interfering efficiency of the siRNA targeting p63 was assessed using Western blotting. MTT and soft agar colony formation assays were used to evaluate the changes in the cell proliferation, and Boyden test was employed to observe the cell invasiveness after the transfection.</p><p><b>RESULTS</b>QBC939 cells showed a high expression of p63. The recombinant lentivirus shRNA-p63 vector was successfully constructed as verified by sequencing. Transfection with the vector significantly suppressed the proliferation and invasiveness of QBC939 cells.</p><p><b>CONCLUSION</b>Down-regulation of p63 can inhibit the proliferation and invasiveness of human cholangiocarcinoma QBC939 cells in vitro.</p>

Progress in the study of β-arrestins in glucose and lipid metabolism / 中华内分泌代谢杂志

β-arrestins are involved in the insulin signaling pathway, affecting peripheral insulin resistance,also affecting insulin secretion and lipid metabolism. To clarify β-arrestins mediated signaling pathways is an approach to the pathogenesis and effective treatment of diabetes.

The effectof Buchangwenxin particle on dispersion of P wave in elder patients with diastolic cardiac dysfunction and paroxysmal atrial fibrillation / 中国基层医药

ObjectiveTo investigate the effect of Buchangwenxin particles in maximum P wave (Pmax), dispersion of P wave(Pd) of elder patients with diastolic cardiac dysfunction and paroxysmal atrial fibrillation(PAF).Methods115 elder patients with diastolic cardiac dysfunction and PAF were randomly divided into two groups:group A received the routine drug therapy,and group B received Buchangwenbxin particles with routine drug therapy.Another 54 elder patients with diastolic cardiac function but without PAF was selected as control group.Changes in Pmax and Pd were compared between groups with or without PAF as well as subgroups.ResultsPmax and Pd were wider in PAF group than no PAF group(all P ＜0.01).There was no difference between group A and B in Pmax and Pd (all P＞ 0.05), and there were less atrial fibrillation as well as shortened Pmax and Pd in group B, which was significantly different with group A(all P ＜0.01).ConclusionPmax and Pd were wider in elder patients with diastolic cardiac dysfunction and PAF than those without PAF,and Buchangwenxin particles could shorten Pmax and Pd and reduce the attacks of atrial fibrillation.