The expression mechanism of programmed cell death 1 ligand 1 and its role in immunomodulatory ability of mesenchymal stem cells / 中华创伤杂志(英文版)

Programmed cell death 1 ligand 1 (PD-L1) is an important immunosuppressive molecule, which inhibits the function of T cells and other immune cells by binding to the receptor programmed cell death-1. The PD-L1 expression disorder plays an important role in the occurrence, development, and treatment of sepsis or other inflammatory diseases, and has become an important target for the treatment of these diseases. Mesenchymal stem cells (MSCs) are a kind of pluripotent stem cells with multiple differentiation potential. In recent years, MSCs have been found to have a strong immunosuppressive ability and are used to treat various inflammatory insults caused by hyperimmune diseases. Moreover, PD-L1 is deeply involved in the immunosuppressive events of MSCs and plays an important role in the treatment of various diseases. In this review, we will summarize the main regulatory mechanism of PD-L1 expression, and discuss various biological functions of PD-L1 in the immune regulation of MSCs.

Clinical observation on Tongdu Tiaoqi acupuncture combined with warming acupuncture for postoperative urinary retention / 中国针灸

OBJECTIVE@#To compare the therapeutic effect of Tongdu Tiaoqi acupuncture (acupuncture for unblocking governor vessel and regulating qi ) combined with warming acupuncture, Tongdu Tiaoqi acupuncture, abdominal moxibustion and oral tamsulosin hydrochloride sustained release capsule on postoperative urinary retention.@*METHODS@#A total of 120 patients with postoperative urinary retention were randomized into an acupuncture-moxibustion group, an acupuncture group, a moxibustion group and a medication group, 30 cases in each group. Tongdu Tiaoqi acupuncture combined with warming acupuncture were applied in the acupuncture-moxibustion group. Tongdu Tiaoqi acupuncture was applied at Baihui (GV 20), Shuigou (CV 26) etc. in the acupuncture group. Moxibustion was applied at Qihai (CV 6), Guanyuan (CV 4), Shuidao (ST 28) and Sanyinjiao (SP 6) in the moxibustion group. Tamsulosin hydrochloride sustained release capsule was given orally in the medication group. The treatment was once a day, and 5-day treatment was required in each group. Before and after treatment, the residual urine volume of bladder, the visual analogue scale (VAS) score and the time of first urethral catheter removal were observed, and the clinical efficacy was compared in the 4 groups.@*RESULTS@#After treatment, the residual urine volume of bladder was decreased compared before treatment in the 4 groups (P<0.05), and that in the acupuncture-moxibustion group was less than the other 3 groups (P<0.05). After treatment, the VAS scores were decreased compared before treatment in the acupuncture-moxibustion group, the acupuncture group and the moxibustion group (P<0.05), and those in the 3 groups were lower than the medication group (P<0.05). The time of first urethral catheter removal in the acupuncture-moxibustion group was earlier than the other 3 groups (P<0.05). The total effective rate was 93.3% (28/30) in the acupuncture-moxibustion group, which was superior to 63.3% (19/30) in the acupuncture group, 60.0% (18/30) in the moxibustion group and 66.7% (20/30) in the medication group (P<0.05).@*CONCLUSION@#The therapeutic effect of Tongdu Tiaoqi acupuncture combined with warming acupuncture on postoperative urinary retention is superior to simple acupuncture, abdominal moxibustion and tamsulosin hydrochloride sustained release capsule.

Effect of electrical stimulation at auricular points combined with sound masking on the expression of CREB, BDNF and TrkB in the auditory cortex of tinnitus rats / 中国针灸

OBJECTIVE@#To explore the effect of electrical stimulation at auricular points (EAS) combined with sound masking on the expression of cAMP-response element binding protein (CREB), brain-derived neurotrophic factor (BDNF) and tyrosine receptor kinase B (TrkB) in the auditory cortex of tinnitus rats.@*METHODS@#A total of 27 adult male SD rats were randomly divided into a control group, a model group and an EAS group. The rats in the model group and the EAS group were intervened with intraperitoneal injection of sodium salicylate to induce tinnitus model, while the rats in the control group were intervened with injection of 0.9% NaCl solution. After the model was successfully established, the rats in the EAS group were treated with electrical stimulation at "Shenmen" (TF) and "Yidan" (CO), combined with sound masking; the treatment was given once a day for 15 days. The gap prepulse inhibition of acoustic startle (GPIAS) and prepulse inhibition (PPI) testing were performed using the acoustic startle reflex starter package for rats. The expression of BDNF, TrkB, CREB and p-CREB in the auditory cortex of each group were measured with Western Blot analysis.@*RESULTS@#① Compared with the control group, the GPIAS values in 12 kHz, 16 kHz, 20 kHz and 28 kHz were significantly decreased in the model group (all 0.05).@*CONCLUSION@#EAS could improve the GPIAS values of high-frequency background sound in tinnitus rats, which may be related with the upregulation of the BDNF/TrkB/CREB signaling pathway in the auditory cortex, leading to the reversion of the maladaptive plasticity.

Clinical value of neutrophil-lymphocyte ratio and platelet-lymphocyte ratio in diagnosis of ankylosing spondylitis / 第二军医大学学报

[Abstract] Objective To assess the clinical value of neutrophil-lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR) in diagnosis of ankylosing spondylitis. Methods Eighty patients with ankylosing spondylitis and 100 normal controls from Changhai Hospital, Naval Medical University (Second Militaray Medical University) were enrolled in our study. The fasting venous blood samples were collected in the morning for routine blood examination. The differences of NLR and PLR between the two groups were analyzed. The receiver operating characteristic (ROC) curve was used to evaluate the sensitivity and specificity of NLR and PLR, and combined diagnostic test was performed. Results The levels of NLR and PLR in ankylosing spondylitis patients were significantly higher than those in the control group (2.25 [1.66, 3.35] vs 1.50 [1.23, 2.09], P0.01; 147.94 [104.11, 188.80] vs 105.75 [89.55, 148.02], P0.01]. ROC curve analysis showed that the area under curve (AUC) of NLR in diagnosis of ankylosing spondylitis was 0.694 (95% confidence interval [CI]: 0.615-0.772, P0.01), and the sensitivity and specificity of NLR were 77.5% and 58.0%, respectively, when the cut-off value was 1.64. The AUC of PLR in diagnosis of ankylosing spondylitis was 0.662 (95% CI: 0.580-0.756), and the sensitivity and specificity of PLR were 66.2% and 63.0%, respectively, when the cut-off value was 120.91. The sensitivity and specificity of NLR and PLR parallel testing (NLR/PLR) were 83.8% and 50.0%, and the sensitivity and specificity of the NLR and PLR tandem testing (NLR＋PLR) were 61.2% and 75.0%, respectively. Conclusion NLR and PLR both have clinical value for the diagnosis of ankylosing spondylitis, and the combination of the two can improve the diagnostic sensitivity and specificity.

Effects of propofol combined with nalbuphine on the diaphragmatic movement of patients with colonoscopy / 临床麻醉学杂志

Objective To investigate the effects of propofol combined with nalbuphine on diaphragmatic movement monitored by ultrasound in patients undergoing colonoscopy.Methods Forty patients, males 21 and females 19, aged 18-65 years, BMI 18-25 kg/m2, ASA physical status I or II, were recruited and scheduled to undergo elective painless colonoscopy.All patients were randomly divided into two groups (n =20):propofol group (group P) and propofol combined with nalbuphine group (group F).Patients in group F received nalbuphine 0.1 mg/kg intravenously 1 min before propofol administration, and patients in group P received same volume of normal saline.Propofol was infused by TCI and the initial target plasma concentration was set at 2μg/ml in all patients.The target concentration was adjusted gradually until the Ramsay sedation score reached 5.Then colonoscopy was started.During the colonoscopy, the propofol concentration was adjusted according to the Ramsay score.Ultrasound was used to monitor the movement of the right diaphragm of the patients.SpO2, MAP, HR, PETCO2, RR, diaphragmatic movement (DM), diaphragmatic thickness at the end of inspiration (TEI) and diaphragmatic thickness at the end of expiration (TEE) were recorded under calm breathing after entering the room (T0), Ramsay sedation score 5 points after propofol administration (T1), and Ramsay sedation score 2 after endoscopy (T2).The diaphragmatic thickening fraction (DTF) was calculated:DTF= (TEI-TEE) /TEI.Adverse reactions such as bradycardia, hypotension, body movement, and respiratory depression were recorded.Results Compared with T0, MAP, SpO2, HR and RR decreased, and PETCO2 increased at T1 time point in patients of the two groups (P<0.05).Compared with group F, the dose of propofol increased in group P (P<0.05).DM at T1 and T2, DTF at T1 were obviously higher in group F than those in group P (P<0.05).There were two cases had body movement in group P, and one case had bradycardia in group F.There was no case suffered from hypotension, respiratory depression and reflux aspiration in two groups.Conclusion Compared with propofol alone, propofol combined with nalbuphine can attenuate the dysfunction of the diaphragm.

Clinical Significance of the Ratio of Neutrophil to Lymphocyte in the Differential Diagnosis of Primary Ulcerative Colitis and the Judgment of Its Severity / 现代检验医学杂志

Objective To investigate the clinical impact of neutrophil to lymphocyte ratio (NLR) in the diagnosis of ulcerative colitis.Methods The study included 97 patients with ulcerative colitis (UC) and 95 patients with irritable bowel syndrome (IBS) from June 2009 to June 2016.The differences of NLR between the two groups were analyzed and the result of sensitivity and specificity were calculated.The differencesn of NLR were analyzed between the groups of different severity and in different lesionsseparately.Results NLR were significantly higher in ulcerative colitis than in irritable bowel syndrome (t=2.327,P＜0.021).Sensitivity was 69.1 ％ and specificity was 75.8 ％.There was statistic different in groups of different severity determination of newly diagnosed ulcerative colitis (F=8.221,P=0.001)and there was no statistic different between different lesions (F=0.737,P=0.483).Conclusion NLR is valuable in the diagnosis of UC and IBS can determine the degree of inflammation of ulcerative colitis.

Effect of silencing TREM1 on rats with neuropathic pain / 临床麻醉学杂志

Objective To investigate the role of triggering receptor expressed on myeloid cells 1 (TREM1)in rats with neuropathic pain and its possible mechanism.Methods Forty-eight male a-dult Sprague-Dawley rats,weighing 220-300 g,were successfully placed intrathecal catheters,and then randomly divided into 4 groups (n=1 2 ):sham operation group (group S),neuropathic pain group (group CCI),TREM1 shRNA group (group RNAi)and negative lentivirus group (group Vi-rus).The neuropathic pain was induced by chronic sciatic nerve compression injury (CCI).In group RNAi,30 μl pGLVU6/RFP/Puro-shRNA (1×109IU/ml)was injected intrathecally 1 week before modeling.Group Virus was injected with 30 μl negative lentivirus,whereas group CCI and group S with equal amount of normal saline.MWT and TWL were measured 1 day before (baseline)and 1,3, 7,14 day after modeling.When behavioral test finished,the expression levels of TREM1,TLR4, MyD88,IκBαand p-NF-κB p65 in spinal cord were determined by Western blot.Whereas the mRNA expression levels of IL-1β,TNF-αand IL-6 in spinal cord were measured by RT-PCR.Results Com-pared with group S,the expression levels of TREM1 in groups CCI and Virus significantly increased (P<0.05).While compared with group CCI,the TREM1 expression of group RNAi in spinal cord significantly decreased (P<0.05).Compared with group S,MWT and TWL of groups CCI,Virus and RNAi after modeling and the expression of IκBαsignificantly decreased (P<0.05),whereas the expression of TLR4,MyD88,p-NF-κB p65 increased significantly (P<0.05),as well as the expres-sion of IL-1β,TNFαand IL-6 mRNA (P<0.05).Compared with group CCI,the MWT and TWL of group RNAi after modeling and the expression of IκBαremarkably increased (P<0.05),whereas the expression of TLR4,MyD88 and p-NF-κB p65 in the spinal cord remarkably decreased (P<0.05), as well as the expression of IL-1β,TNF-αand IL-6 mRNA (P<0.05).Conclusion TREM1 knock-down can alleviate neuropathic pain,the underlying mechanism might be the inhibition of TLR4/MyD88/NF-κB signaling pathway.

Changes of serum C-X-C motif ligand 13 concentration in senior patients undergoing total hip replacement / 临床麻醉学杂志

Objective To investigate the changes of serum C-X-C motif ligand 13 (CXCL13) concentration in senior patients undergoing total hip replacement and its role in post-operative dys-function(POCD).Methods Eighty consecutive senior patients aged 65-80 years with BMI 18.4-27.3 kg/m2,ASA physical status Ⅱ or Ⅲ,were recruited and scheduled to undergo hip joint replacement operation.Neuropsychological test was performed 1-5 d after operation and patients were divided into POCD group and non-POCD group.Serum C reactive protein (CPR),procalcitonin (PCT),IL-6, TNF-α,CXCL13 concentration were detected 1 d before and 1,2,3,4,5 d after operation. Results A total of 21 (26%)patients developed POCD 1-5 d after operation (recruited in POCD group),and the other 59 patients were recruited in non-POCD group.Compared with the time point of 1 d before operation,serum CRP,PCT,IL-6,TNF-αand CXCL13 concentration were higher 1-5 d after operation in all patients (P<0.05).The concentrationsof these factors were higher in patients from POCD group than in those from non-POCD group 1-5 d after operation (P < 0.05). Conclusion The CXCL13 concentration insenior patients undergoing total hip replacement who devel-oped POCD were higher than in those who did not developed POCD.Whether it is correlated with POCD remains further study.

Improved quality of care based on role exchange experiences / 中华医院管理杂志

From year 2013 to 2016, the Beijing Municipal Administration of Hospitals has carried out the role exchange campaign at 22 municipal public hospitals.Through this experience, we can increase mutual trust between doctors and patients and enhance the level of hospital management.The campaign adheres to the principles of hospital public welfare, hospital service, patient safety, medical quality management, and continuous improvement, nursing management and quality control, and hospital management.

Accuracy of different biomarkers for early diagnosis of acute kidney injury in patients undergoing cardiovascular surgery under cardiopulmonary bypass / 中华麻醉学杂志

Objective To evaluate the accuracy of different biomarkers for early diagnosis of acute kidney injury ( AKI ) in the patients undergoing cardiovascular surgery under cardiopulmonary bypass ( CPB) . Methods A total of 200 patients, aged 22-86 yr, weighing 46-87 kg, scheduled for elective cardiovascular surgery under CPB, were enrolled in this study. The concentration of serum creatinine was determined at 1 day before operation and 1-7 days after operation. At 1 day before operation and 0, 2, 6 and 12 h after operation, the concentrations of urine neutrophil gelatinase-associated lipocalin (NGAL), cystatin C ( Cys C) , tissue inhibitor of matrix metalloproteinase type 2 ( TIMP-2) and insulin-like growth factor binding protein-7 ( IGFBP-7) were determined. The TIMP-2 and IGFBP-7 product ( TI) was calcu-lated. AKI was diagnosed after surgery according to Kidney Disease Improving Global Outcomes criteria. The receiver operating characteristic curve was plotted, and the area under receiver operating characteristic curve ( AUC) was calculated. Results The incidence of AKI was 20. 5％. The AUC of AKI diagnosed by the concentration of urine NGAL was 0. 689, 0. 709, 0. 713 and 0. 803 at 0, 2, 6 and 12 h after opera-tion, respectively ( P<0. 05) . The AUC of AKI diagnosed by the concentration of urine Cys C was 0. 639, 0. 762, 0. 774 and 0. 812 at 0, 2, 6 and 12 h after operation, respectively ( P<0. 05) . The AUC of AKIdiagnosed by TI was 0. 687, 0. 721, 0. 740 and 0. 779 at 0, 2, 6 and 12 h after operation, respectively ( P<0. 05) . The AUC of AKI diagnosed by combined three indices the parallel test was 0. 694, 0. 773 and 0. 794 at 0, 2 and 6 h after operation, respectively ( P<0. 05) . The AUC of AKI diagnosed by the serial test was 0. 610, 0. 631 and 0. 667 at 0, 2 and 6 h after operation, respectively. Conclusion Urine NGAL or Cys C concentrations or TI single detection and parallel test have a certain accuracy for early diag-nosis of AKI in the patients undergoing cardiovascular surgery under CPB.

Research progress of alcoholic cardiomyopathy / 心血管康复医学杂志

Alcoholic cardiomyopathy is a kind of specific cardiomyopathy caused by long-term heavy drinking.It stands the final influence of alcoholism on heart.Its symptoms show no difference with other cardiomyopathy.Therefore,early diagnosis of alcoholic cardiomyopathy is very important.Though it has been aware by physicians,there still exist some defects in its pathophysiology,pathogenesis,prognosis and treatment.

Role of C-X-C motif chemokine 13 in sepsis-associated encephalopathy in mice / 中华麻醉学杂志

Objective To evaluate the role of C-X-C motif chemokine 13 (CXCL13) in sepsis-associated encephalopathy in mice.Methods A total of 64 healthy male C57BL/6J mice,aged 3-4 months,weighing 20-25 g,were divided into 4 groups (n=16 each) using a random number table method:sham operation group (Sham group),sepsis group (S group),CXCL13 siRNA group (si-CXCL13 group) and negative control siRNA group (si-control group).5-bromo-2-deoxyuridine (BrdU) 50 mg/kg was intraperitoneally injected twice a day for 3 consecutive days in the four groups,and then lipopolysaccharide 500 μg/kg was intraperitoneally injected to establish the sepsis model in S,si-CXCL13 and si-control groups.CXCL13 siRNA 5 μl and siRNA 5 μl were injected into the left lateral cerebral ventricle in si-CXCL13 and si-control groups,respectively,at 3 days before establishing the model.Morris water maze test was performed at 5 days after establishing the model.The escape latency,time spent in the target quadrant,and the number of crossing the platform were recorded.Mice were sacrificed after the end of test,brains were removed and hippocampi were isolated for examination of the pathological changes of the dentate gyrus (with a light microscope) and for determination of the expression of CXCL13,C-X-C motif chemokine receptor 5 (CXCR5) and brain-derived neurotrophic factor (BDNF),and the number of BrdU and BrdU/NeuroD positive cells (by immunofluorescence).Results Compared with sham group,the escape latency was significantly prolonged,the time spent in the target quadrant was shortened,and the number of crossing the platform was reduced on 2nd-4th days,the number of BrdU positive cells in the dentate gyrus was increased,and the number of BrdU/NeuroD positive cells in the dentate gyrus was decreased in S,siCXCL13 and si-control groups,and the expression of CXCL13 and CXCR5 was up-regulated,and the expression of BDNF was down-regulated in LPS and si-control groups (P＜0.05).Compared with S group,the escape latency was significantly shortened,the time spent in the target quadrant was prolonged,and the number of crossing the platform was increased on 2nd-4th days,the number of BrdU positive cells in the dentate gyrus was decreased,the number of BrdU/NeuroD positive cells in the dentate gyrus was increased,and the expression of CXCL13 and CXCR5 was down-regulated,and the expression of BDNF was up-regulated in si-CXCL13 group (P＜0.05),and no significant change was found in the parameters mentioned above in si-control group (P＞0.05).Conclusion CXCL13 is involved in sepsis-associated encephalopathy through regulating hippocampal neurogenesis,and the mechanism may be related to down-regulating the expression of hippocampal BDNF in mice.

Comparison of predictive capability of different methods for difficult laryngoscopy / 临床麻醉学杂志

Objective To explore the predictive capability of different methods for difficult la-ryngoscopy and analyze its optimal cutoff value.Methods Three hundred consecutive patients (aged 18-65 years,weighing 42-88 kg,ASA physical status Ⅰ or Ⅱ)scheduled to undergo general anesthe-sia and surgery were invited to participate.Difficult airway assessments were performed by thyromen-tal height (TMH),thyromental distance (TMD),sternomental distance (SMD),modified Mallam-pati test (MMT)and ratio of height and TMD (RHTMD)before anesthetic induction.Cormack-Le-hane (C-L)grade of laryngoscopy view was assessed after induction.Sensitivity,specificity,positive predictive value (PPV),negative predictive value (NPV)and accuracy of these tests were calculated. Receiver operator characteristic (ROC)curve of TMH was performed to determine the optimal cutoff value of TMH.Results There were 22 patients diagnosed as difficult airway.Sensitivity,specificity, PPV,NPV and accuracy of TMH were higher than those of TMD,SMD and MMT tests.Sensitivity of RHTMD was lower than that of TMH test,and specificity,PPV,NPV and accuracy of RHTMD were similar to that of TMH.The optimal cutoff value of TMH was 4.9 cm through ROC curve. Conclusion The optimal cutoff value of TMH detecting difficult laryngoscopy was 4.9 cm.Similar to RHTMD,TMH appears to be more effective for prediction of difficult laryngoscopy than TMD, SMD and MMT.

Effects of acetylated HMGB1 in rats with sepsis associated encephalopathy / 临床麻醉学杂志

Objective To investigate the effects of acetylated HMGB1 on cognitive function in rats with sepsis associated encephalopathy (SAE) and the effect of HMGB1 inhibitor.Methods Forty-eight males mice were randomly assigned to three groups (n=16): sham group (group S),cecal ligation puncture group (group C),cecal ligation puncture+sodium butyrate group (group B).Cecal ligation puncture was applied to establish the SAE model,and group S received sham operation.Rats in groups S and C were injected with normal saline 5 ml/kg 30 min and 4 h after CLP,respectively.The rats in group B were intraperitoneally injected with sodium butyrate 500 mg/kg 0.5 h and 4 h after CLP,respectively.All animals were performed Morris water maze test on 4th day after operation,and the exploring time of space exploration experiments were assessed on 7th day after CLP surgery.IL-6,BDNF,HMGB1 and acetylated HMGB1 expression in hippocampus of all rats were determined by Western Blot.Results Compared with group S,the latency of rats in group C was longer and the exploring time was shorter (P<0.05).Compared with group C,the latency of rats in group B was shorter and the exploring time was longer (P<0.05).Compared with group S,the expression of IL-6,HMGB1 and acetylated HMGB1 in group C increased (P<0.05) and the level of BDNF decreased (P<0.05).Compared with group C,the expression of IL-6,HMGB1 and acetylated HMGB1 in group B decreased (P<0.05) and the level of BDNF increased (P<0.05).Conclusion HMGB1 inhibitor sodium butyrate can inhibit the expression of acetylated HMGB1 in the hippocampus of SAE rats,and reduce the cognitive impairment induced by sepsis.

Investigation and analysis of the relevant knowledge of skin expander in congenital microtia patients′ families / 中国实用护理杂志

Objective To understand the patients of congenital microtia malformation families knowledge of skin expander and influencing factors. Methods Self-made questionnaire to sample survey of 500 cases of our department (Plastic Surgery Hospital, Chinese Academy of Medical Sciences, the second microtia concer) patients′ families. Results 47.8％(239/500) of 500 patients of expander knowledge level is high, 41.2％(206/500) pass the exam, 11.0％(55/500) fall the exam, only 13.4％(67/500) really have a comprehensive understanding on expander achieve excellent. Scores of male and female were (16.06 ± 1.99) points and (16.39 ± 2.16) points, t = 1.752, P > 0.05, there was no statistically significant difference comparing the 2 group. Patients′ families score of different cultural levels, respectively (14.06 ± 2.36), (14.98 ± 2.02), (16.54 ± 2.00), (16.73 ± 1.88) points, F = 21.736, P 0.05, there was no statistically significant difference comparing the 5 groups. Patients with different professional families score (13.25 ± 2.19), (13.79±2.27), (16.08±1.89), (14.10±2.08), (14.13±2.35), (14.45±2.09), (14.56±1.75), (16.84± 1.81) points, F = 2.737, P < 0.01, difference of eight groups was statistically significant. Conclusions Congenital microtia patients′families skin expander knowledge needs to be improved, it is necessary to take various forms, conduct for families of expander knowledge through propaganda and education.

Presence of Severe Stenosis in Most Culprit Lesions of Patients with ST-segment Elevation Myocardial Infarction / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Previous studies revealed that culprit vessels of ST-segment elevation myocardial infarction (STEMI) were often related to mild or moderate stenosis. However, recent studies suggested that severe stenosis was primarily found in culprit lesions. The objective of this study was to analyze the stenosis severity of culprit lesions in STEMI patients and to clarify the paradoxical results.</p><p><b>METHODS</b>A total of 489 consecutive STEMI patients who underwent primary percutaneous coronary intervention were retrospectively studied from January 2012 to December 2014. The patients were divided into three groups based on stenosis severity using quantitative coronary analysis: Group A, 314 cases, stenosis ≥70%; Group B, 127 cases, stenosis 50-70%; and Group C, 48 cases, stenosis ≤50%. The clinical, demographic, and angiographic data of all groups were analyzed.</p><p><b>RESULTS</b>Patients in Group A exhibited a significantly higher prevalence of history of angina pectoris (95.9% vs. 62.5%, P< 0.001), multivessel disease (73.2% vs. 54.2%, P = 0.007), and lower cardiac ejection fraction (53.3 ± 8.6 vs. 56.8 ± 8.4, P= 0.009) than those in Group C. Multivariable analysis revealed that history of angina pectoris (odds ratio [OR]: 13.89, 95% confidence interval [CI]: 6.21-31.11) and multivessel disease (OR: 2.32, 95% CI: 1.25-4.31) were correlated with severe stenosis of the culprit lesion in Group A.</p><p><b>CONCLUSIONS</b>Most culprit lesions in STEMI patients were severe stenosis. These patients exhibited a higher prevalence of angina history and multivessel diseases.</p>

Palmitate induces apoptosis and endoplasmic reticulum stress in human umbilical cord-derived mesenchymal stem cells / 生理学报

The saturated free fatty acid (FFA), palmitate, could induce apoptosis in various cell types, but little is known about its effects on human umbilical cord-derived mesenchymal stem cells (hUC-MSCs). Here, we investigated whether palmitate induced apoptosis and endoplasmic reticulum (ER) stress in hUC-MSCs. hUC-MSCs were stained by labeled antibodies and identified by flow cytometry. After administration with palmitate, apoptotic cell was assessed by flow cytometry using the Annexin V-FITC/7-AAD apoptosis detection kit. Relative spliced XBP1 levels were analyzed using semi-quantitative RT-PCR. The mRNA of BiP, GRP94, ATF4 and CHOP were analyzed by real-time PCR. Relative BiP and CHOP protein were analyzed using Western blot analysis. The results showed that hUC-MSCs were homogeneously positive for MSC markers; palmitate increased apoptosis of hUC-MSCs and activated XBP1 splicing, BiP, GRP94, ATF4 and CHOP transcription. These findings suggest that palmitate induces apoptosis and ER stress in hUC-MSCs.

Structure features of polysaccharides from Chrysanthemum morifolium and their activities against tumor cells and NF-κB / 中草药

Objective: To clarify the structure features of polysaccharides from Chrysanthemum morifolium (PCM) and to study their activities against tumor cells and NF-κB. Methods: Six homogeneous neutral polysaccharides were obtained from three kinds of C. morifolium (Hangju, Huaiju, and Boju) flowers by successive hot water extraction, followed by ethanol precipitation, ion-exchange chromatography, and gel permeation chromatography. Their primary structures were characterized by HPGPC, IR, GC, and GC-MS analyses. Their bioactivities were examined by MTT assay using PANC-1 and LO2 cells. In addition, NF-κB signaling activation in PANC-1 and LO2 cells treated by polysaccharides were also measured. Results: The weight-average molecular mass of the six PCM, CMTA0S1, CMTA0S3, CMJA0S1, CMJA0S2, CMBA0S1, and CMBA0S3 was 7.523 × 104, 7.80 × 103, 7.80 × 104, 1.04 × 104, 5.79 × 104, and 1.35 × 104, respectively. CMTA0S1, CMJA0S1, and CMBA0S1 mainly contained galactose (Gal), arabinose (Ara) and glucose (Glc) residues in molar ratio of 1.23:1.00:0.20, 2.18:1.00:0.53, and 3.30:1.00:0.75, while CMTA0S3, CMJA0S2, and CMBA0S3 mainly contained Gal, Ara, Glc, and mannose (Man) residues in molar ratio of 0.73:1.00:0.40:0.21, 1.39:1.00:0.84: 0.55, and 1.19:1.00:0.48:0.19. Methylation analysis indicated that six PCM primarily consisted of T-arabinofuranosyl, 1, 5-arabinofuranosyl, 1, 4-galactopyranosyl, 1, 3, 6-galactopyranosyl, and 1, 4-glucopyranosyl residues. The biological activity study suggested that all the PCM could inhibit the growth of PANC-1 cells. Among them the inhibitory rates of CMTA0S3 and CMJA0S2 were at most to 70% with concentration-effect relationship. The NF-κB inhibition test indicated that only the crude polysaccharide CMBA had strong immunosuppressive activity, and homogeneous polysaccharides CMTA0S1 and CMJA0S1 showed potential immunostimulation. Conclusion: The six homogeneous polysaccharides share similar structures and inhibition on PANC-1 cells growth. Meanwhile they also may regulate the NF-κB activation.

Trace chemical constituents contained in Trachelospermum jasminoides and structure identification / 中国中药杂志

<p><b>OBJECTIVE</b>To study trace chemical constituents contained in traditional Chinese medicine Trachelospermum jasminoides.</p><p><b>METHOD</b>The chemical constituents were separated and purified by using such column chromatographic methods as ployamide, silica gel, Sephadex LH-20 and ODS, and their structures were identified on the basis of spectral data analysis.</p><p><b>RESULT</b>Eleven compounds were separated from T. jasminoides and identified as bergenin (1), chrysoeriol-7-O-beta-D-glucoside (2), arctigenin-4'-O-beta-gentiobioside (3), matairesinol 4'-O-beta-gentiobioside (4), traxillagenin (5), traxillaside (6), 4-demethyltraxillagenin (7), luteolin-7-O-beta-gentiobioside (8), arctiin (9), trachelogenin-4'-O-beta-gentiobioside (10) and luteolin-7-O-beta-D-glucoside (11).</p><p><b>CONCLUSION</b>Compounds 1 and 2 were separated from Trachelospermum genus for the first time, while compounds 3-7 were separated from this plant for the first time.</p>

The protective effects of ischemia preconditioning on the lung injury following with limbs ischemia/reperfusion / 中国应用生理学杂志

<p><b>OBJECTIVE</b>To explore the protective effects of ischemic preconditioning (IPC) on the lung injury following with limbs ischemia /reperfusion (LI/R).</p><p><b>METHODS</b>The models of LI/R injury were constructed in rabbits. The blood from right external jugular vein and left common carotid artery, into and out-flowing pulmonary blood (IPB, OPB) respectively. Superoxide dismutase (SOD), malondialdehyde (MDA), nitric oxide (NO) in IPB and OPB and lung tissues were measured, as well as total nitric oxide synthase (tNOS) and inducible nitric oxide synthase (iNOS) in lung tissues were detected in different groups. The effects of IPC on the lung injury were observed.</p><p><b>RESULTS</b>Compared with sham and before ischemic, the activity of SOD decreased and the content of MDA and NO increased after 4 h ischemia followed by 4 h reperfusion in IPB, OPB and lung tissues. The activity of tNOS and iNOS in lung tissues increased remarkably as well, there was statistical significance (P < 0.05, P < 0.01). SOD increased and MDA, NO, tNOS, iNOS decreased significantly by IPC before ischemia/reperfusion. The correlation analysis indicated that MDA was negatively correlated with SOD and was positively correlated with MDA, NO, iNOS (P < 0.01).</p><p><b>CONCLUSION</b>Oxygen free radicals metabolic confusion of lung occurred in the course of LI/R, IPC could strengthen the resistance of peroxidation in lung and had protective effects on the lung injury following with LI/R.</p>