Research progress on the effect of iron oxide nanoparticles in macrophage polarization / 生物医学工程学杂志

Macrophages are important immune effector cells with significant plasticity and heterogeneity in the body immune system, and play an important role in normal physiological conditions and in the process of inflammation. It has been found that macrophage polarization involves a variety of cytokines and is a key link in immune regulation. Targeting macrophages by nanoparticles has a certain impact on the occurrence and development of a variety of diseases. Due to its characteristics, iron oxide nanoparticles have been used as the medium and carrier for cancer diagnosis and treatment, making full use of the special microenvironment of tumors to actively or passively aggregate drugs in tumor tissues, which has a good application prospect. However, the specific regulatory mechanism of reprogramming macrophages using iron oxide nanoparticles remains to be further explored. In this paper, the classification, polarization effect and metabolic mechanism of macrophages were firstly described. Secondly, the application of iron oxide nanoparticles and the induction of macrophage reprogramming were reviewed. Finally, the research prospect and difficulties and challenges of iron oxide nanoparticles were discussed to provide basic data and theoretical support for further research on the mechanism of the polarization effect of nanoparticles on macrophages.

Expression and characterization of β-N-acetylglucosaminidases from Bacillus coagulans DSM1 for N-acetyl-β-D glucosamine production / 生物工程学报

β-N-acetylglucosaminidases (NAGases) can convert natural substrates such as chitin or chitosan to N-acetyl-β-D glucosamine (GlcNAc) monomer that is wildly used in medicine and agriculture. In this study, the BcNagZ gene from Bacillus coagulans DMS1 was cloned and expressed in Escherichia coli. The recombinant protein was secreted into the fermentation supernatant and the expression amount reached 0.76 mg/mL. The molecular mass of purified enzyme was 61.3 kDa, and the specific activity was 5.918 U/mg. The optimal temperature and pH of the BcNagZ were 75 °C and 5.5, respectively, and remained more than 85% residual activity after 30 min at 65 °C. The Mie constant Km was 0.23 mmol/L and the Vmax was 0.043 1 mmol/(L·min). The recombinant BcNagZ could hydrolyze colloidal chitin to obtain trace amounts of GlcNAc, and hydrolyze disaccharides to monosaccharide. Combining with the reported exochitinase AMcase, BcNagZ could produce GlcNAc from hydrolysis of colloidal chitin with a yield over 86.93%.

Content Determination of Related Substances in Belinostat by HPLC / 中国药房

OBJECTIVE：To establish the method for the con tent determination of related substances in belinstat. METHODS ： HPLC method was adopted and the principal component self-control comparison method with correction factor was used to calculate the contents of related substances. The determination was performed on ODS-AM column with 1.02％ potassium dihydrogen phosphate buffer （pH value adjusted to 3.5 with phosphoric acid ）-acetonitrile（85∶15，V/V）as mobile phase A ，1.02％ potassium dihydrogen phosphate buffer （pH value adjusted to 3.5 with phosphoric acid ）-acetonitrile（30 ∶ 70，V/V）as mobile phase B （gradient elution ），at the flow rate of 1.0 mL/min. The column temperature was set at 30 ℃，and the detection wavelength was 220 nm. The sample size was 10 μL. RESULTS：The linear ranges of belinstat and impurities A ，D，F，G，H were 0.113-1.693， 0.050-1.496，0.117-1.750，0.098-1.471，0.120-1.799，0.100-1.506 μ g/mL（r≥0.999 7）. The correction factors of the last 5 impurities were 1.0，1.0，1.2，1.5，1.0；the detection limits were 0.250，0.590，0.490，0.600，0.500 ng，respectively. The quantification limits were 0.500，1.170，0.980，1.200，1.000 ng，respectively. The recoveries were 90.18％-111.48％（RSD＝ 1.52％-4.78％，n＝9）. RSDs of stability （100 h）and precision tests were no more than 16％，and the durability was good. Impurities A ，D and H were detected in 3 batches of belinlestat ，the contents were 0.030％-0.038％，0.019％-0.022％ and 0.012％-0.013％，respectively. The contents of other maximum monomer impurities were 0.012％-0.013％ and the total impurities were 0.075％-0.084％. Impurities B ，C，F，G were not detected. CONCLUSIONS ：The method for the content determination of related substances in belinstat has been successfully established ，and the method is accurate and specific.

School physician in primary and secondary schools in Yichang of Hubei Province during 2019-2020 / 中国学校卫生

Objective@#To understand school physician in primary and secondary schools in Yichang City, Hubei Province from 2019 to 2020, and to provide a reference for strengthening the school physician team in primary and secondary schools.@*Methods@#149 and 102 primary and secondary schools from 6 municipal districts in Yichang City, Hubei Province, were randomly selected in November 2019 and November 2020, respectively, and were administered by questionnaire survey.@*Results@#The proportion of school physicians increased from 39.6% in 2019 to 65.7% in 2020. In the past two years, the equipment rate of school physician in both central and fringe urban areas increased, especially the fringe urban areas, number of school physician increased from 38 to 96. A total of 93 and 141 school physicians were selected to pariticipate in questionaire survey in 2019 and 2020 respectively. The survey showed that more than 90% of school physicians in primary and secondary schools in Yichang received training, and 74.5% had college education level. However, most of them lack professional qualification and medical background.@*Conclusion@#School physician of primary and secondary of Yichang is well development over the past two years, and the proportion substantially increased. However, there is still room for improvement in the quantity and quality of school physicians, and professional qualification needs to be improved. More attention should be paid to the marginal urban areas to achieve a balance between quantity and quality.

Research Progress of Nano-drug Delivery System Targeting Tumor-associated Macrophage in Cancer Treatment / 肿瘤防治研究

Tumor-associated macrophages(TAMs), abundantly infiltrated in the tumor microenvironment, have a significant influence on tumor metastasis, angiogenesis and immune escape. Therefore, TAMs-targeted immunotherapy has become a hot point in the field of cancer treatment. However, most of the conventional TAMs-targeted agents may cause serious adverse effects, such as short retention time, poor drug enrichment and drug-resistance. In order to overcome these shortcomings, nanobiotechnology has attracted considerable attention. More recently, a series of important progress for nanomedicine has been achieved in the area of drug delivery and diagnostic imaging, because of their special physical and chemical properties. Hence, the TAMs-targeted nanomedicine delivery system provides new ideas for tumor immunotherapy. This paper reviews the role of TAMs in tumor microenvironment, the tumor-promoting mechanism, and introduces the research progress of nanomedicine in TAMs polarization, nanodrug delivery, TAMs-targeted imaging and preventing the TAMs recruitment, so as to provide reference for the application of nanotechnology in tumor immunotherapy.

A calcium-sensing receptor polymorphism at E942K promotes the proliferation of gastric cancer cells via Ca and ERK1/2 pathways / 生理学报

The study was designed to investigate the effects and mechanism of a calcium-sensing receptor (CaSR) polymorphism at E942K on the proliferation of gastric cancer cells. Single nucleotide polymorphisms (SNPs) were detected between gastric cancers group and normal controls group by DNA sequence analysis. The cell model was constructed by transfection of E942K mutant plasmid and wild-type (WT) plasmid into SGC-7901 and HEK-293 cells. The effect of E942K mutation on cell proliferation ability was detected by CCK8 and cell clone formation experiments. The effect of E942K mutation on calcium signaling was detected by calcium imaging. Western blot experiments were used to detect changes in phosphorylation levels of key proteins ERK1/2 and β-catenin in downstream signaling pathways after E942K mutation. The results showed that the mutation rate of E942K in gastric cancer group was significantly higher than that in normal control group (P < 0.05). CCK8 and cell clone formation experiments showed that E942K mutation significantly improved the proliferation ability of SGC-7901 gastric cancer cells and HEK-293 cells. E942K mutation enhanced calcium signaling in SGC-7901 and HEK-293 cells. E942K mutation enhanced ERK1/2 phosphorylation without affecting β-catenin phosphorylation. The results suggest that E942K mutation in CaSR may ultimately promote the proliferation of gastric cancer cells by enhancing intracellular calcium signaling and ERK1/2 phosphorylation. These results have potential clinical implications for the diagnosis and targeted therapy of gastric cancer.

A case report of spermatic neuroblastoma / 中华泌尿外科杂志

The purpose of this study is to study the clinical characteristics of spermatic cord tumor.The clinical data of a case of varicocele in our hospital were analyzed retrospectively.In this case,the patients with varicocele had a good recovery after operation.Varicocele is a rare case.The best mode of treatment is surgical resection and follow-up after operation.

Predictive Value of Pancreatic Steatosis for Severity of Coronary Atherosclerosis in Patients with Type 2 Diabetes Mellitus / 中国医学科学院学报

To investigate the association of pancreatic steatosis with coronary atherosclerosis in patients with type 2 diabetes mellitus (T2DM). Patients with T2DM who underwent coronary computed tomography angiography(CCTA)in our center due to chest pain were enrolled from January 2016 to February 2019. According to the CCTA findings,patients were divided into normal group,mild-to-moderate coronary atherosclerosis group and severe coronary atherosclerosis group. CT attenuation of pancreas and spleen was measured on abdominal non-enhanced CT,and the CT attenuation indexes including the difference between pancreatic and splenic attenuation (P-S) and the ratio of pancreas-to-spleen attenuation (P/S) were calculated. Analysis of variance or Kruskal-Wallis rank test were used to assess differences among each group. Logistic regression analysis was used to analyze the risk factors of severe coronary stenosis. The accuracy of P/S in predicting severe coronary artery stenosis was assessed by receiver operator characteristic (ROC) curve analysis. A total of 173 consecutive T2DM patients were enrolled. These patients included 27 patients with normal coronary artery (15.6%),124 patients with mild to moderate stenosis (71.7%),and 22 patients with severe stenosis (12.7%). There were significant differences in CT attenuation of pancreas (=11.543,=0.003),P-S (=11.152,=0.004) and P/S (=11.327,=0.004) among normal coronary artery group,mild and moderate stenosis group,and severe stenosis group. The CT attenuation of pancreatic head,body,and tail significantly differed in patients with coronary artery stenosis (=14.737,=0.001). After adjusting for confounding factors,multiple Logistic regression showed that P/S (=0.062,95%=0.008-0.487,=0.008) was still significantly associated with the severe coronary artery stenosis. The area under the ROC curve of P/S for the diagnosis of severe coronary artery stenosis was 0.701,and the optimal cutoff point was 0.660. CT attenuation of pancreas and CT attenuation indexes are associated with the severity of coronary stenosis in T2DM patients,suggesting that pancreatic steatosis may be used as one of the indicators for predicting severe coronary artery stenosis.

Application value of enhanced recovery after surgery in the laparoscopic surgery for cholecystolithiasis comorbid with choledocholithiasis / 中华消化外科杂志

Objective To explore the clinical application value of enhanced recovery after surgery (ERAS) in the laparoscopic surgery for cholecystolithiasis comorbid with choledocholithiasis.Methods The prospective study was conducted.The clinicopathological data of 52 patients with cholecystolithiasis comorbid with choledocholithiasis who were admitted to the Third Affiliated Hospital of Zunyi Medical University from September 2016 to September 2018 were collected.Patients were divided into 2 groups by random number table:patients in observation group received laparoscopic cholecystectomy + choledocholithotomy + choledochoscopic exploration +T-tube drainage (or primary suture of common bile duct) and perioperative management guided by the concept of enhanced recovery after surgery (ERAS),and patients in control group received traditional perioperative management.Observation indicators:(1) surgical situations;(2) postoperative situations;(3) postoperative complications;(4) postoperative pain scores;(5) changes in hepatic function and blood routine during perioperative period.Follow-up using outpatient examination and telephone interview was performed to detect complications during the postoperative 6 months up to March 2019.Measurement data with normal distribution were represented as Mean ± SD,and comparison between groups was analyzed using the paired t test or repeated ANOVA.Count data were described as absolute numbers and percentages,and comparison between groups was analyzed using the chi-square test or Fisher exact probability.Results Fifty-two patients were screened for eligibility,including 20 males and 32 females,aged 25-68 years,with an average age of 53 years.There were 30 patients in the observation group and 22 in the control group.(1) Surgical situations:the operation time and volume of intraoperative blood loss were (133± 19) minutes and (47 ± 21) mL in the observation group,and (136±22) minutes and (49±23)mL in the control group,respectively,showing no significant difference between the two groups (t=-0.386,-0.211,P＞0.05).(2) Postoperative situations:time to out-of-bed activity,time to initial food intake,time to first anal flatus,duration of postoperative hospital stay,and hospital expenses were (18±4) hours,(19±5) hours,(28±2)hours,(4.0± 1.0)days,and (1.82±0.22) × 104 yuan in the observation group,and (29±7)hours,(46±9)hours,(37±4)hours,(6.6±1.6)days,and (2.25±0.29) ×104 yuan in the control group,respectively,showing significant differences between the two groups (t =-7.054,-14.169,-9.426,-6.582,-5.809,P＜0.05).(3) Postoperative complications:1 of 30 patients in the observation group had postoperative biliary leakage,with a postoperative complication rate of 3.3％,and was cured after symptomatic support treatment.Six of 22 patients in the control group had postoperative complication,with a postoperative complication rate of 27.3％,including 2 of biliary leakage,1 of hemorrhage,1 of abdominal infection,1 of pulmonary infection,1 of urinary infection,and they were cured after symptomatic support treatment.There was a significant difference between the two groups (x2 =4.358,P ＜ 0.05).(4) Postoperative pain scores:from postoperative 6 hours to 48 hours,the postoperative pain score changed from 2.4 ± 0.7 to 1.9± 0.9 in the observation group,and from 4.1 ± 0.7 to 2.9 ± 0.9 in the control group,respectively,showing a significant difference in the changing trend between the two groups (F=78.053,P＜0.05).(5) Changes in hepatic function and blood routine during perioperative period:from preoperation to postoperative 3 days,levels of alamine aminotransferase (ALT),aspartate transaminase (AST),gamma-glutamyltransferase (GGT),total bilirubin (TBil),and count of white blood cells in the observation group changed from (77±20)U/L to (53± 12)U/L,from (85±22)U/L to (61± 17) U/L,from (166±39) U/L to (55±24) U/L,from (40± 13) μmol/L to (29±12) μmol/L,from (7.0±2.0) × 109/L to (6.8± 1.9) × 109/L,and changed from (79±23) U/L to (62± 14) U/L,from (88±24)U/L to (64± 17) U/L,from (179±34) U/L to (74±29) U/L,from (45± 13) μmol/L to (35±12) μmol/L,from (7.9±2.4)× 109/L to (7.5± 1.9)× 109/L in the control group,respectively.The levels of ALT,AST,GGT,TBiL,and count of WBC showed increasing at postoperative 1 day,and decreasing at postoperative 3 days.There was no significant difference in the changing trend between the two groups (F=0.058,0.471,3.021,1.593,2.172,P＞0.05).Conclusion ERAS is safe and effective in the laparoscopic surgery for choledocholithiasis comorbid with cholecystolithiasis.

Comparison of Prenatal Diagnostic Value between Fast Imaging Employing Steady State Acquisition and Single Shot Fast Spin Echo Sequence in Diagnosis of Placental Invasion / 中国医学科学院学报

Objective To compare the prenatal diagnostic value and image quality of magnetic resonance imaging(MRI)with fast imaging employing steady state acquisition(FIESTA)or single shot fast spin echo(SSFSE)sequence,in order to provide references for sequence selection of prenatal diagnosis.Methods The MRI data of 121 patients with suspected placental invasion were retrospectively analyzed. The ability of FIESTA in displaying MRI signs associated with placental invasion and its image quality were assessed and compared with SSFSE. Based on the records of cesarean section and pathological finding,the sensitivity,specificity,positive predictive values,and negative predictive values of these two sequences were calculated.Results The image quality was significantly higher in FIESTA than in SSFSE(χ =29.74,P=0.000). FIESTA had significantly higher ability to display focal interruptions in the myometrial wall than SSFSE(χ =6.750,P=0.006);in addition,the ability to display abnormal vessel in the placenta(χ =8.471,P=0.020),placental heterogeneity(χ =13.885,P=0.000),hypointense intraplacental bands(χ =4.267,P=0.035)were also significantly higher in SSFSE than in FIESTA,while the efficiency for displaying uterine bulging(χ =0.250,P=0.625),uterine recess(χ =0.167,P=0.687),uterine penetration and parametrium implantation(χ =0.800,P=0.375),and protrusion of the placenta into the cervix(χ =0.081,P=0.776)were not significantly different between these two sequences. Both sequences had a specificity of 100% in displaying uterine penetration and parametrium implantation,uterine recess,and protrusion of the placenta into the cervix. Conclusions FIESTA has better ability in displaying the contour and demarcation of placenta and uterine,whereas SSFSE is more efficient in displaying the changes of intraplacental signals. FIESTA can be used to observe the relationship between the placenta and the surrounding structures and whether the surrounding tissue is implanted,and the changes of placental signals can be observed in SSFSE. The combination of these two sequences can improve the prenatal diagnosis of placenta invasion.

Application value of enhanced recovery after surgery in the laparoscopic surgery for cholecystolithiasis comorbid with choledocholithiasis / 中华消化外科杂志

Objective@#To explore the clinical application value of enhanced recovery after surgery (ERAS) in the laparoscopic surgery for cholecystolithiasis comorbid with choledocholithiasis.@*Methods@#The prospective study was conducted. The clinicopathological data of 52 patients with cholecystolithiasis comorbid with choledocholithiasis who were admitted to the Third Affiliated Hospital of Zunyi Medical University from September 2016 to September 2018 were collected. Patients were divided into 2 groups by random number table: patients in observation group received laparoscopic cholecystectomy + choledocholithotomy + choledochoscopic exploration + T-tube drainage (or primary suture of common bile duct) and perioperative management guided by the concept of enhanced recovery after surgery (ERAS), and patients in control group received traditional perioperative management. Observation indicators: (1) surgical situations; (2) postoperative situations; (3) postoperative complications; (4) postoperative pain scores; (5) changes in hepatic function and blood routine during perioperative period. Follow-up using outpatient examination and telephone interview was performed to detect complications during the postoperative 6 months up to March 2019. Measurement data with normal distribution were represented as Mean±SD, and comparison between groups was analyzed using the paired t test or repeated ANOVA. Count data were described as absolute numbers and percentages, and comparison between groups was analyzed using the chi-square test or Fisher exact probability.@*Results@#Fifty-two patients were screened for eligibility, including 20 males and 32 females, aged 25-68 years, with an average age of 53 years. There were 30 patients in the observation group and 22 in the control group. (1) Surgical situations: the operation time and volume of intraoperative blood loss were (133±19)minutes and (47±21)mL in the observation group, and (136±22)minutes and (49±23)mL in the control group, respectively, showing no significant difference between the two groups (t=-0.386, -0.211, P>0.05). (2) Postoperative situations: time to out-of-bed activity, time to initial food intake, time to first anal flatus, duration of postoperative hospital stay, and hospital expenses were (18±4)hours, (19±5)hours, (28±2)hours, (4.0±1.0)days, and (1.82±0.22)×104 yuan in the observation group, and (29±7)hours, (46±9)hours, (37±4)hours, (6.6±1.6)days, and (2.25±0.29)×104 yuan in the control group, respectively, showing significant differences between the two groups (t=-7.054, -14.169, -9.426, -6.582, -5.809, P<0.05). (3) Postoperative complications: 1 of 30 patients in the observation group had postoperative biliary leakage, with a postoperative complication rate of 3.3%, and was cured after symptomatic support treatment. Six of 22 patients in the control group had postoperative complication, with a postoperative complication rate of 27.3%, including 2 of biliary leakage, 1 of hemorrhage, 1 of abdominal infection, 1 of pulmonary infection, 1 of urinary infection, and they were cured after symptomatic support treatment. There was a significant difference between the two groups (χ2=4.358, P<0.05). (4) Postoperative pain scores: from postoperative 6 hours to 48 hours, the postoperative pain score changed from 2.4±0.7 to 1.9±0.9 in the observation group, and from 4.1±0.7 to 2.9±0.9 in the control group, respectively, showing a significant difference in the changing trend between the two groups (F=78.053, P<0.05). (5) Changes in hepatic function and blood routine during perioperative period: from preoperation to postoperative 3 days, levels of alamine aminotransferase (ALT), aspartate transaminase (AST), gamma-glutamyltransferase (GGT), total bilirubin (TBil), and count of white blood cells in the observation group changed from (77±20)U/L to (53±12)U/L, from (85±22)U/L to (61±17)U/L, from (166±39)U/L to (55±24)U/L, from (40±13)μmol/L to (29±12)μmol/L, from (7.0±2.0)×109/L to (6.8±1.9)×109/L, and changed from (79±23)U/L to (62±14)U/L, from (88±24)U/L to (64±17)U/L, from (179±34)U/L to (74±29)U/L, from (45±13)μmol/L to (35±12)μmol/L, from (7.9±2.4)×109/L to (7.5±1.9)×109/L in the control group, respectively. The levels of ALT, AST, GGT, TBiL, and count of WBC showed increasing at postoperative 1 day, and decreasing at postoperative 3 days. There was no significant difference in the changing trend between the two groups (F=0.058, 0.471, 3.021, 1.593, 2.172, P>0.05).@*Conclusion@#ERAS is safe and effective in the laparoscopic surgery for choledocholithiasis comorbid with cholecystolithiasis.

Effect of alveolar macrophages phagocytosis on prognosis in patients with acute respiratory distress syndrome caused by abdominal infection: a multicenter study / 中华危重病急救医学

Objective To investigate the effects of alveolar macrophage phagocytosis on prognosis in patients with acute respiratory distress syndrome (ARDS) caused by abdominal infection. Methods ARDS patients caused by severe intra-abdominal infection admitted to intensive care unit (ICU) of Tianjin Fourth Central Hospital, Tianjin Nankai Hospital, Tianjin First Central Hospital and Tianjin Fifth Central Hospital from June 2016 to March 2018 were enrolled. The gender, age, acute physiology and chronic health evaluationⅡ(APACHEⅡ) within 24 hours of admission, neutral red phagocytosis and alkaline phosphatase activity of macrophages in bronchoalveolar lavage fluid, the length of ICU stay, total hospitalization time, hospitalization expenses, and prognosis were recorded. According to the prognosis, the patients were divided into death group and survival group, and the parameters were compared between the two groups. Pearson test was used to analyze the correlation between neutral red phagocytosis function of macrophages and alkaline phosphatase activity and other indicators. The prognosis was analyzed by binary Logistic regression combined with neutral red phagocytosis and alkaline phosphatase activity in patients, and the predictive value of both subjects on prognosis was analyzed by the receiver operating characteristic (ROC) curve. Results Twenty patients were enrolled in the study, with 8 in the death group and 12 in the survival group. Compared with the survival group, the death group was older (years old: 58.50±14.86 vs. 46.67±13.40), APACHEⅡ score was higher (21.50±3.93 vs. 13.58±4.12), neutral red phagocytosis ability and alkaline phosphatase activity of alveolar macrophages were significantly decreased (A value:0.265±0.050 vs. 0.338±0.016; μmol/L: 12.06±1.24 vs. 17.96±3.90), and the length of ICU stay was significantly longer (days: 22.00±14.59 vs. 11.50±3.17), hospitalization cost was significantly increased (10 thousand Yuan:24.17±11.02 vs. 13.44±3.53), the total hospitalization time was shorter (days: 25.25±15.01 vs. 35.67±8.58), and the difference was statistically significant (all P < 0.05). There was no significant difference in gender between the survival group and the death group [male (case): 8 vs. 6, P > 0.05]. The neutral red phagocytosis ability of alveolar macrophages in ARDS patients caused by abdominal infection was negatively correlated with age, APACHEⅡ score and the length of ICU stay (r value was -0.328, -0.572, -0.809, respectively, all P < 0.05); alkaline phosphatase activity was negatively correlated with age, APACHEⅡ score, the length of ICU stay and hospitalization expenses (r value was -0.334, -0.583,-0.470, -0.517, respectively, all P < 0.05). Binary Logistic regression analysis showed that neutral red phagocytosis [odds ratio (OR) = 0.596, 95% confidence interval (95%CI) = 0.212-0.997] and alkaline phosphatase activity (OR = 0.573, 95%CI = 0.339-0.968) were the influencing factors of prognosis (both P < 0.05). ROC curve analysis showed that the AUC of neutral red phagocytosis ability for prognosis of ARDS patients caused by abdominal infection was 0.948, and the sensitivity and specificity were 91.7% and 87.5% when the off-cut value was 0.317. The AUC of alkaline phosphatase for the prognosis of ARDS patients caused by abdominal infection was 0.813; when the cut-off value was 19.72 μmol/L, the sensitivity was 75.0%, and the specificity was 87.5%. Conclusion The alveolar macrophage phagocytosis dysfunction in ARDS patients caused by severe abdominal infection was not only related to the severity of the disease, but also increased the medical burden of patients, and significantly affected the mortality of such patients.

Mechanical Properties and Biological Characteristics of the Porous 3D-Printed β-TCP Composite Scaffolds / 医用生物力学

Objective To study the mechanical properties and biological characteristics of 3D-printed porous β-tricalcium phosphate ［β-Ca3(PO4)2, β-TCP］ scaffolds, so as to provide guidance for the design of composite scaffolds in animal experimentation. Methods Poly 1,8-octanediol citrate (POC), a kind of novel biodegradable materials, was used as the adhesive. The 3D-printed porous β-TCP scaffolds were fabricated by fused deposition modeling (FDM) technology, and Gly-Arg-Gly-Asp-Ser (GRGDS), a kind of polypeptides, was added into the scaffolds to improve the adhesive property of cells. The optical microscope and scanning electron microscope (SEM) were used to observe the micro-pore architectures of those scaffolds. The material testing machine was used to conduct compressive test on the scaffolds, and the water contact angles of the scaffolds were measured. The cell adhesion rate and proliferation rate of the scaffolds were also tested by in vitro cell experiment. The model of SD rat skull defects was repaired by the scaffolds, and the osteogenic ability in vivo was further studied. Results The GRGDS, remaining active, was evenly distributed in the composite scaffolds. The micro-pore architectures of the polypeptide modified scaffolds changed, with improvement in cell adhesion rate, while the compressive modulus, water contact angle and osteogenic ability in vivo of the scaffolds were not obviously affected. Conclusions The cell adhesion capacity of β-TCP composite scaffolds modified by polypeptide improved significantly, while the mechanical properties and hydrophilicity, osteogenic ability in vivo of the scaffolds were not affected very much. These research results provide new ideas for reconstruction of scaffolds for repairing bone defects in clinic, and a laboratory basis for further clinical application of this scaffold.

Expression and Clinical Significance of Peripheral Blood T cell JAK2/STAT3 mRNA in Chronic Idiopathic Thrombocytopenic Purpura / 中国实验血液学杂志

OBJECTIVE@#To detect the expression of JAK2/STAT3 mRNA in peripheral blood T cells from the patients with chronic idiopathic thrombocytopenic purpura（CITP）, and to explore the relationship between JAK2/STAT3 mRNA and CITP.@*METHODS@#CITP group and healthy control group were set in this study, The JAK2/STAT3 mRNA expression level in peropheral blood T cells of 2 groups was detected with the RT-PCR and agarose gel electrophoresis.@*RESULTS@#JAK2 mRNA expression level in CITP group was significantly higher than that in control group（P<0.01）, the STAT3 mRNA expression level in CITP group was also higher than control group（P<0.01）, The JAK2/STAT3 mRNA expression level of CITP patiants increased obviously compared with control group.@*CONCLUSION@#The expression level of JAK2/STAT3 mRNA increases signficanlty in chronic ITP patients, which involves in pathogenesis of CITP.

Optimize excipients for Yinsang hypoglycemic granules by using multiple indexes / 中国中药杂志

Optimal excipients were screened by studying the effect of different excipients on the hygroscopicity of the extract, testing polysaccharide in the preparation and blood glucose value. Single factor tests were performed with hygroscopicity, formability and fluidity as the indexes, and the moisture content, granule yield and angle of repose were combined with physical characters of the materials to screen the proportioning and dosage of excipients. Then the critical relative humidity of preferred Yinsang granules were measured. The optimum excipients for Yinsang hypoglycemic granules were mulberry leaf paste-microcrystalline cellulose-mactra veneriformis crude polysaccharides (10∶9∶1.67). The obtained granules had good formability and fluidity, which were not easy to absorb moisture for liquefaction, with a critical relative humidity of 73%. This formation process was reasonable and feasible, suitable for industrial production, which can significantly improve hygroscopicity and liquefaction properties of extracts, improve stability of Yinsang granules, and provide reference for screening of excipients for other preparations.

Magnetic resonance imaging features of Cryptococcus infection in central nervous system in patients with AIDS / 中南大学学报(医学版)

Objective:To investigate the magnetic resonance imaging (MRI) features of Cryptococcus infection in central nervous system patients with acquired immune deficiency syndrome (AIDS).Methods:The retrospective study on magnetic resonance imaging (MRI) and clinical data of cryptococcal meningitis (CM) was carried out between July 2011 and March 2017.These patients had not received anti-retroviral treatment.Patients with other specific or suspicious diseases in the central nervous system were not included in the analysis.Results:A total of 39 patients were included in the analysis,with CD4 cell counts of 13.0×106/L [(0-205)×106/L],and 94.9％ (37/39) of patients with CD4 cell count ＜100×106/L.Of the 39 patients,26 patients showed abnormal MRI signals in the brain,which were most frequently involved in the basal ganglia (20/26,76.9％).The basal ganglia lesions showed dilated VirchowRobin space (VRS)/gelatinous spseudocysts (18/20,90％).Postcontrast T 1-weighted MRI revealed no significant enhancement (3/5,60％) and mild enhancement (2/5,40％).The incidence of cerebral cryptococcal granuloma were 35％ (7/20).Nineteen of 26 patients with lesions outside the basal ganglia,of which 13 patients also complicated with basal ganglia lesions.Postcontrast T1-weighted MRI revealed no significant enhancement.The incidence of cryptococcal granuloma and meningeal thickening were 15.7％ (3/19) and 26.3％ (5/19),respectively.Postcontrast T1-weighted MRI meningeal thickening revealed enhancement (5/5,100％).Conclusion:The incidence of brain MRI abnormality in AIDS complicated with central nervous system Cryptococcus infection may not be low,and the lesions are mostly located in the basal ganglia.It most frequently displays the dilated VRS/gelatinous spseudocysts.It can also be showed cryptococcal granuloma.Postcontrast T1-weighted MRI often reveals no enhancement or mild enhancement.

Effects on phenotype and function of mouse CIK cells treated with carboxylated single-walled carbon nanotubes / 中国免疫学杂志

Objective:To investigate the effect on the phenotype and function of CIK cells induced from splenic lymphocyte in mice treated with carboxylated single-walled carbon nanotubes.Methods:CIK cells were treated with carboxylated single-walled carbon nanotubes at different concentrations.Cell growth status was observed using inverted fluorescence microscopy.The killing effect was de-termined by MTS method.Immunophenotype was analyzed by flow cytometry.Results: With the increase of the effect target ratio,the killer rate of CIK was gradually enhanced and the optimal effect target ratio was 20:1.With the increase of the dose of carboxylated single-walled carbon nanotubes,the proportion of Treg cells decreased.When CIK cells were treated with 0.5 μg/ml carboxylated single-walled carbon nanotubes(CNTs),the proportion of CD3+CD4+and CD3+CD8+was significantly higher than that of the control group(P<0.05),and the killing effects of CIK anchieved best results to B16 cells,H22 cells and RM-1cells.Conclusion: The carboxylated single-walled carbon nanotubes enhanced the ability of CIK cells to kill tumor cells,significantly which provide has potential value in tumor drug development.

An analysis of prognostic factors in patients suffering from acute lung injury/acute respiratory distress syndrome complicated with Yangming Fushi syndrome：a report of 206 cases from multiple centers / 中华危重病急救医学

ObjectiveTo investigate the risk factors of patients with acute lung injury/acute respiratory distress syndrome (ALI/ARDS) complicated with Yangming Fushi syndrome.Methods A prospective study was conducted. From August 2009 to July 2013, 206 patients with Yangming Fushi syndrome combined with ALI/ARDS were enrolled in the intensive care units ( ICUs ) of the following five hospitals: Tianjin Nankai Hospital, Dongzhimen Hospital Affiliated to Beijing Traditional Chinese Medicine University, General Hospital of Tianjin Medical University, the First Affiliated Hospital of Dalian Medical University, and Wuxi Third People's Hospital in Jiangsu Province. According to the mortality occurring in ICU, the patients were divided into death group and survival group. The gender, age, acute physiology and chronic health evaluation Ⅱ ( APACHE Ⅱ ) score within the first 24 hours after admission, the length of invasive mechanical ventilation, usage of vasoactive agents, ratio of operative intervention, the length of stay in ICU, application of continuous renal replacement therapy ( CRRT ), amount of blood transfusion, the level of C-reactive protein ( CRP ), lactulose/mannitol ( L/M ) ratio, the number of organs with dysfunction, oxygenation index ( PaO2/FiO2 ), levels of lactate and serum creatinine ( SCr ) of both groups were recorded. Logistic regression analysis was used to look for the independent risk factors of death of patients. Results There were 124 cases with severe acute pancreatitis ( SAP ), which was the most common disease with manifestation of Yangming Fushi syndrome combined with ALI/ARDS, accounting for 60.19% of all the patients. During the period of hospitalization in ICU, 171 patients survived and 35 died, and the mortality rate was 16.99%. The risk factors of the two groups were analyzed by variable analysis, and it was shown that compared with those in survival group, the age ( years: 57.26±16.23 vs. 48.07±13.48, t = 3.544, P = 0.000 ), APACHE Ⅱ score ( 20.83±9.73 vs. 12.61±6.63, t = 4.777, P = 0.000 ), the length of invasive mechanical ventilation ( days: 10.97±7.71 vs. 6.91±2.48, t = 2.555, P = 0.015 ) and the number of dysfunction organs ( 3.11±1.21 vs. 1.60±1.34, t = 6.222, P = 0.000 ) in death group were significantly higher. The level of PaO2/FiO2 [ mmHg ( 1 mmHg = 0.133 kPa ): 218.56±64.90 vs. 244.58±85.10, t = -2.024, P = 0.044 ] in the death group was significantly lower than that of the survival group, while the length of ICU stay ( days: 14.33±10.81 vs. 9.11±7.37, t = 2.600, P = 0.010 ), the usage rates of CRRT [ 28.57% ( 10/35 ) vs. 15.20% ( 26/171 ), χ2 = 3.968, P = 0.046 ], vasoactive agents [ 28.57% ( 10/35 ) vs. 12.28% ( 21/171 ), χ2 = 6.511, P = 0.011 ], and blood transfusion ratio [ 42.86% ( 15/35 ) vs. 23.39% ( 40/171 ), χ2 = 7.042, P = 0.008 ] were all obviously higher in the death group than those in the survival group. There were no statistically significant differences in gender, number of operation, the levels of CRP, L/M ratio, lactate and SCr between the two groups ( all P > 0.05 ). Multivariate logistic regression analysis showed that age [ odds ratio ( OR ) = 0.938, 95% confidence interval ( 95%CI ) = 0.898-0.980, P = 0.004 ], APACHE Ⅱ score ( OR = 0.914, 95%CI = 0.839-0.996, P = 0.041 ), the number of dysfunction organs ≥ 3 ( OR = 0.223, 95%CI = 0.066-0.754, P = 0.016 ), and the level of PaO2/FiO2 ( OR = 0.990, 95%CI = 0.982-0.998, P = 0.015 ) were independent risk factors for mortality. Conclusions The age, APACHE Ⅱ score, number of dysfunction organs ≥ 3 and the level of PaO2/FiO2 are of significance in predicting the prognosis of patients with Yangming Fushi syndrome combined with ALI/ARDS. Patients with risk factors of high mortality should be more carefully monitored and treated aggressively.

MRI characteristics and pathological correlation regarding the intrahepatic cholangiocarcinoma without cholangiectasis / 中华放射学杂志

Objective To studying the MR findings and pathology of peripheral small intrahepatic cholangiocarcinoma and improving the understanding of peripheral small cholangiocarcinoma with no-bile duct dilatation. Methods A retrospective analysis of 12 patients with intrahepatic peripheral cholangiocarcinoma which were confirmed by surgery and pathology, all patients were examined by abdominal MRI without and with contrast. Correlation was made with gross pathology and surgical pathological specimen. Results On T1WI, there were 4 cases of complex low signal intensity and 8 cases of low signal intensity. On T2WI, there were 8 cases of high signal intensity and 4 cases of complex high signal intensity. Enhanced MRI showed: marked nidus enhancement on arterial phase in 1 case, and the pathological diagnosis was poorly differentiated adenocarcinoma. Inhomogeneous enhancement or annular enhancement were seen in 10 cases on arterial phase, 3 of these cases showed thin annular enhancement on arterial phase, low signalintensity on portal venous phase and isointensity on delayed phase. One case showed delayed enhancement. Thick circular enhancement correlated with pathological changes of survival of tumor cells, center areas correlated with fibrous connective tissue, and a small amount of necrotic tissue. Island-like enhancement or inhomogeneous enhancement were seen in 3 cases. Corresponding pathological changes consisted of tumor tissue and a small amount of fibrous connective tissue, as well as somenecrotic tissue. In 1 case, no enhancement was seen on all three phases and pathological changes showed cystic changes, hemorrhage, necrosis, with survival tumor cells seen between cyst and normal liver tissue. Conclusions MRI scanning of peripheral small cholangiocarcinoma lacked characteristic features, but dynamic contrast-enhanced MR had certain specific findings. Due to different pathology, the fibrous tissue, necrotic tissue and survival tumor tissue components were exhibited different imaging findings.

Therapeutic effect of BMSCs with over-expressed MMP1 on liver fibrosis / 中南大学学报(医学版)

OBJECTIVE@#To investigate the function of bone marrow mesenchymal stem cells (BMSCs) with over-expressed matrix metalloproteinase 1 (MMP1) on liver fibrosis.@*METHODS@#Fifty SD male rats were randomly divided into 4 groups: recombinant adenovirus Adhuman MMP-1(hMMP-1)-enhanced green fluorescent protein (EGFP) transfected BMSCs group (Group A, n=10), Ad-EGFP transfected BMSCs group (Group B, n=10), liver fibrosis group (Group C, n=15), and a normal group (Group D, n=15). The liver fibrosis model was formed by subcutaneous injection of the mixed liquor of carbon tetrachloride (CCL4) and vegetable oil. After 10 weeks, the model of liver fibrosis was formed. Group A and B were administered the transfected BMSCs via the tail veins, while Group C and D were administered normal saline. After 3 weeks, the rats were sacrificed. The body weight, liver weight, liver function, liver fibrosis indexes and liver pathological changes were tested.@*RESULTS@#Compared with the control group, the rats administered BMSCs with over-expressed MMP1 showed a significant improvement in the body weight, liver weight and plasma albumin (ALB) (P<0.05), and a significant reduction in the plasma alanine aminotransferase, total bilirubin, hyaluronic acid, laminin and procollagen III (P<0.05). Hematoxylin-eosin staining confirmed that the degree of liver fibrosis was significantly ameliorated under average visual fields (P<0.05).@*CONCLUSION@#The repair ability of BMSCs on liver fibrosis can be enhanced by over-expression of hMMP-1.