Effect of Placing Drainage or Not on Rapid Rehabilitation after Primary Total Knee Arthroplasty / 中国康复理论与实践

Objective:To explore the effect of placing drainage or not on rapid rehabilitation after total knee arthroplasty (TKA). Methods:From January, 2018 to September, 2020, 80 patients with knee osteoarthritis who underwent primary TKA in our hospital were analyzed retrospectively, and they were divided into groups A and B, with 40 cases in each group. Drainage was placed routinely in group A and not in group B. The postoperative serum inflammatory factors, postoperative pain score, postoperative complication rate, postoperative time out of bed, hospital stay, knee function score, range of motion of knee and World Health Organization Quality Of Life-abbreviated version score (WHOQOL-BREF) were compared between two groups. Results:There was no significant difference in the levels of C-reactive protein between two groups on the 1st to 3rd day after operation (t < 0.410, P > 0.05). There was no significant difference in Visual Analogue Score between two groups from 12 h to 48 h after operation (t < 0.300, P > 0.05). The incidences of postoperative complications were 5.0% in group A and 2.5% in group B, with no significant difference between two groups (χ2 = 0.346, P > 0.05). The time of getting out of bed and hospital stay was significantly shorter in group B than in group A (t > 4.863, P < 0.001). The scores of knee joint function, range of motion of knee and WHOQOL-BREF significantly increased after operation in both groups (t > 6.099, P < 0.001), however, there was no significant difference between two groups (P > 0.05). Conclusion:Placement or non-placement of drainage after primary TKA does not affect postoperative complications, knee joint function and quality of life of patients with knee osteoarthritis, however, non-placement of drainage can promote postoperative recovery and discharge.

Effects of Flexi-bar on Nonspecific Low Back Pain / 中国康复理论与实践

Objective:To investigate the effects of Flexi-bar on nonspecific low back pain. Methods:From June, 2020 to January, 2021, 30 patients with nonspecific low back pain were enrolled. Firstly, all the patients performed core stabilization exercise (supine bridge, curl-up and four-point support) using Flexi-bar or not, respectively. And the difference of electromyography (EMG) root mean square (RMS) value of transversus abdominis and multifidus was observed. Secondly, they were randomly divided into control group (n = 15) and experimental group (n = 15). The control group performed core stabilization exercise, and the experimental group received Flexi-bar training in addition, 30 minutes a time, three times a week, for six weeks. They were evaluated with Visual Analogue Scale (VAS) and Oswestry Disability Index (ODI), and measured the thickness of transversus abdominis and the area of multifidus before and after training. Results:Firstly, there was significant difference in RMS of transversus abdominis and multifidus between using Flexi-bar or not (|t| > 2.468, P < 0.05), except the RMS of transversus in supine bridge (|t| < 2.029, P > 0.05). Secondly, before training, there was no significant difference between the control group and the experimental group (|t| < 1.944, P > 0.05); after training, the scores of VAS and ODI significantly decreased (|t| > 6.808, P < 0.001), the thickness of transversus abdominis and the area of multifidus significantly increased (|t| > 5.937, P < 0.001), and all the indexes were better in the experimental group than in the control group (|t| > 2.411, P < 0.05)， except the thickness of transverse abdominis (t = -1.431, P > 0.05). Conclusion:Flexi-bar could facilitate to reduce pain and improve the function of patients with nonspecific low back pain.

Advance in Scapular Dyskinesis and Its Rehabilitation Management (review) / 中国康复理论与实践

Conclusion:The clinical assessment and classification of scapular dyskinesis had been summarized. Scapular dyskinesis is mainly secondary to rotator cuff injury, subacromial impingement syndrome, glenohumeral instability, injury of acromioclavicular joint, throwing shoulder and adhesive capsulitis, etc. Scapular exercise may be a supplement to routine rehabilitation management. Objective:To review the pathogeny, clinical assessment and classification, and rehabilitation management of scapular dyskinesis. Results and Methods:The literatures in recent ten years were reviewed and summarized.

Comparative study on prognosis of neoadjuvant chemotherapy followed by hepatic surgery versus upfront surgery in patients with synchronous colorectal liver metastasis / 中华胃肠外科杂志

Objective: To compare the survival outcome in patients with synchronous colorectal cancer liver metastasis receiving neoadjuvant chemotherapy followed by hepatic surgery versus upfront surgery strategies. Methods: A retrospective cohort study was carried out. Data of patients undergoing surgery at the Department of Hepatopancreatobiliary Surgery Unit I of Peking University Cancer Hospital from January 2008 to December 2018 for initially resectable synchronous colorectal liver metastasis were retrospectively collected. A total of 282 cases were enrolled, including 244 in the neoadjuvant chemotherapy group, 38 in the upfront surgery first group. The overall survival (OS) and progression-free survival (PFS) of the two groups were compared. A propensity score risk adjustment was used to eliminate potential bias between groups, and the covariates including sex, age, location of primary tumor, T stage, clinical risk score (CRS), RAS gene status, adjuvant chemotherapy, and resection margin status were included for adjustment. Results: In the neoadjuvant chemotherapy group, 244 cases received 4 (1-15) cycles of chemotherapy before hepatic resection, among whom 207 cases received oxaliplatin-based regimens, 37 cases received irinotecan-based regimens, and 90 cases received combined targeted agents in the first line treatment. The median follow-up time was 30 (5-134) months, and loss of follow-up was 1%. Before adjustment, Kaplan-Meier survival analysis showed that the 1-year and 3-year OS rates in the neoadjuvant chemotherapy group (95.1% and 66.4%) were better than those in the upfront surgery first group (94.7% and 51.5%, P=0.026); 1-year and 3-year PFS rates in neoadjuvant chemotherapy group (51.0% and 23.4%) were also better than those in surgery first group (39.5% and 11.5%, P=0.039). After propensity score risk adjustment, Cox multivariate analysis indicated that neoadjuvant chemotherapy was an independent protective factor of PFS (HR=0.664, 95% CI: 0.449-0.982, P=0.040), however, neoadjuvant chemotherapy was not an independent protective factor of OS (HR=0.651, 95% CI: 0.393-1.079, P=0.096). Subgroup analysis showed that the 1-year and 3-year OS rates in the patients with response to the first line treatment (194, including complete remission, partial remission and reduction but not partial remission) (96.9% and 67.1%) were better than those in the upfront surgery group (94.7% and 51.5%, P=0.026) after adjustment. However, the 1-year and 3-year OS rates in the patients without response to the first line treatment (50, including tumor progression or enlargement) were 90.0% and 63.3%, respectively, which were not significantly different with 94.7% and 51.5% in the upfront surgery group (P=0.310) after adjustment. Conclusions: For patients with resectable synchronous colorectal cancer liver metastasis, liver resection after neoadjuvant chemotherapy can provide longer PFS than upfront surgery. Although the whole OS benefit is not significant, patients with effective neoadjuvant first-line chemotherapy have better OS than those undergoing upfront surgery.

Epidemic situation of human echinococcosis in Inner Mongolia Autonomous Region: a sampling survey from 2012 to 2017 / 中国血吸虫病防治杂志

Objective To investigate the epidemiological characteristics of human echinococcosis in Inner Mongolia Autonomous Region, so as to provide evidence for the development of the precision control strategy of human echinococcosis in the region. Methods A sampling survey of human echinococcosis was conducted in 28 banners (counties, districts) of Inner Mongolia Autonomous Region from 2012 to 2017, and the epidemiological characteristics were descriptively analyzed. Results A total of 90 058 residents were examined for echinococcosis in 28 banners (counties, districts) of Inner Mongolia Autonomous Region from 2012 to 2017, and 71 patients were detected with echinococcosis, with a detection rate of 0.08%. No echinococcosis cases were identified in 8 banners (counties), and there were 6 banners (counties) with echinococcosis prevalence of 0.1% to 1%, and 14 with prevalence of 0 to 0.1%. The echinococcosis prevalence was significantly greater in women (0.11%) than in men (0.05%) (χ2 = 10.09, P = 0.001), and the highest prevalence was detected in patients at ages of over 50 years (38 cases, 53.52%). In addition, the highest echinococcosis prevalence was detected in herdsmen (0.14%), or in primary school children (0.13%). Conclusions Human echinococcosis is widely, but lowly prevalent in Inner Mongolia Region, with a diverse density of infections. Echinococcosis has remarkable characteristics of regional and population clusters in Inner Mongolia Region, and the management of echinococcosis requires to be reinforced in key regions and populations.

Spatial distribution characteristics of reported echinococcosis patients in Inner Mongolia Autonomous Region from 2013 to 2018 / 中国血吸虫病防治杂志

Objective To investigate the spatial distribution patterns and changing tendency of reported echinococcosis patients in Inner Mongolia Autonomous Region from 2013 to 2018, so as to provide the evidence for the management of echinococcosis in high-risk areas. Methods All data pertaining to echinococcosis patients in Inner Mongolia Autonomous Region were captured from the National Notifiable Communicable Disease Reporting System from 2013 to 2018 and analyzed using a spatial epidemiological method. Results The incidence of reported echinococcosis was 0.22 to 0.41 per 100 000 in Inner Mongolia Autonomous Region from 2013 to 2018, and the number of banner reporting echinococcosis patients increased from 24 in 2013 to 39 in 2018. The highly prevalent areas of echinococcosis were mainly concentrated in West Ujimqin Banner (the highest incidence, 19.23 per 100 000), East Ujimqin Banner (the highest incidence, 12.93 per 100 000) and New Barag Right Banner (the highest incidence, 11.66 per 100 000). Three-dimensional trend analysis showed that the areas with high incidence of reported echinococcosis were mainly located in central by eastern parts of Inner Mongolia Autonomous Region. There was a positive spatial autocorrelation in the number of echinococcosis patients, and the cases appeared a clustering distribution (Moran’s I > 0, P < 0.05), with “high-high” and “low-high” regions. Conclusion The reported echinococcosis patients show a spatial aggregation in Inner Mongolia Autonomous Region, and the hotspot areas are mainly concentrated in Xilingol League and Chifeng City, in which targeted control interventions for Inner Mongolia Autonomous Region are recommended to be intensified.

Effect of Ginsenoside Rh2 on Metastasis and Invasion of Colorectal Cancer Resistant Cells HCT116/L-OHP and Its Mechanism / 中国实验方剂学杂志

Objective:To observe effect of ginsenoside Rh2 (GRh2) on the invasion and migration of colon cancer resistant cells HCT116/L-OHP and its specific mechanism. Method:Cell counting kit-8 (CCK-8) assay was used to detect the inhibitory effect of different concentrations of GRh2 (0, 2.5, 5, 10, 20, 40 mg·L-1) on HCT116/L-OHP cell proliferation, scratch assay, Transwell assay and adhesion assay were used to detect the effects of GRh2 (0, 2.5, 5, 10 mg·L-1) on cell migration, invasion and adhesion. The protein expression levels of E-cadherin and matrix metalloproteinase-9(MMP-9) were examined by Western blot. Result:Compared with control group, GRh2(5, 10, 20, 40 mg·L-1) significantly inhibited the proliferation of HCT116/L-OHP cells in a dose-dependent manner(PP2 group (5, 10 mg·L-1) was significantly decreased (PP2 group was significantly decreased (PP2 group was significantly reduced (PP2 (10, 20, 30 mg·L-1) promoted E-cadherin protein expression (PPPConclusion:GRh2 can significantly inhibit the invasion and migration of HCT116/L-OHP in colon cancer cells, and its potential mechanism may be related to the promotion of E-cadherin and the inhibition of MMP-9 expression in a dose-dependent manner.

Neuroprotective Effect of Modified Yuejuwan and Ganmai Dazao Tang on Glutamate-induced HT22 Cell Injury Model / 中国实验方剂学杂志

Objective: To investigate the neuroprotective effect of modified Yuejuwan and Ganmai Dazao Tang (YJGZ) on glutamate-induced cell injury of mouse hippocampal neuron cell line (HT22). Method: The HT22 cell was cultured aseptically, and the cell injury model was established with high concentration of glutamate acid, YJGZ aqueous extract and drug-containing serum were prepared. Then experiment was divided into normal group, model group, YJGZ drug-containing serum groups (1%, 5%, 10%), YJGZ aqueous extract group (166 mg·L-1), and nimodipine group (100 μmol·L-1). Methye thiazolye telrazlium (MTT) was used to detect the cell survival rate of each group, the level of lactate dehydrogenase (LDH) release and intracellular reactive oxygen species (ROS) were detected by enzyme-linked immunosorbent assay (ELISA). Western blot was used to detect the protein expression of hippocampal N-methyl-D-aspartate receptor subunit 2B protein (NR2B), cyclic adenosine response element binding protein (CREB), phosphorylated cyclic adenosine response element binding protein (p-CREB), extracellular regulated protein kinase (ERK),and phosphorylated extracellular regulated protein kinase (p-ERK). Result: As compared with normal group, the cell survival rate was significantly decreased in model group (PPPPPPPPPPConclusion: YJGZ aqueous extract has a significant protective effect on glutamate-induced HT22 cell injury.

Correlation of Social-psychological Health and Joint Function in Patients during Rehabilitation for Joint Impairment / 中国康复理论与实践

Objective:To explore the influence of social-psychological factors on outcome of joint rehabilitation. Methods:From October, 2015 to April, 2017, 64 inpatients accepting joint rehabilitation were divided into anxiety group and non-anxiety group, and depression group and non-depression group, according to the scores of Hamilton Anxiety Scale and Hamilton Depression Scale. They were assessed with routine joint scores as initial and final stages of joint rehabilitation, as well as Symptom Checklist-90 (SCL-90) and World Health Organization Disability Assessment Schedule 2.0 (WHO-DAS 2.0). The correlation of joint scores to scores of SCL-90 and WHO-DAS 2.0 was analyzed with Spearman correlation analysis. Results:There were significant differences in joint scores between the depression and the non-depression groups initially and finally (|t| > 2.106, P < 0.05). The joint score at the initial stage was negatively correlated with the interpersonal factor score of SCL-90 (r = -0.257, P < 0.05). The joint score at the final stage was negatively correlated (P < 0.05) with the dimension one (r = -0.257) and four (r = -0.278) of WHO-DAS 2.0, total score (r = -0.263), and interpersonal (r = -0.328) and hostile (r = -0.385) factor scores of SCL-90. Improvement of joint score negative correlated with dimension one of WHO-DAS 2.0 score (r = -0.249, P < 0.05). Conclusion:The social-psychological factors affect the outcome of joint rehabilitation. It is necessary to explore the way to take the the social-psychological assessment into the routine three stage evaluation of the joint rehabilitation protocol.

Comparison of submental tumorigenesis model and axillary tumorigenesis model in nude mice xenotransplanted with human hypopharyngeal carcinoma cells / 第二军医大学学报

Objective To establish a submental tumorigenesis model by injecting human hypopharyngeal carcinoma cells to nude mice, and to compare the model with traditional axillary tumorigenesis model. Methods Five-week-old male nude mice were selected and divided into submental tumorigenesis model group (submental group) and axillary tumorigenesis model group (axillary group). Each group was divided into two subgroups by injecting human hypopharyngeal carcinoma cells FADU or HN31, namely sub-FADU, sub-HN31, ax-FADU, and ax-HN31 groups, with 12 nude mice in each group. The nude mice in the submental group were injected with tumor cells in the left side of submental area, and those in the axillary group were injected with tumor cells in the right side of axillary area. The time of tumor formation, tumor volume and body mass of nude mice were measured. The death of nude mice was recorded. After eight weeks, the local tumor growth, infiltration, and organ metastasis such as liver, spleen and kidney of the survival nude mice were examined by ultrasound, and the tumor metastasis was observed by routine H-E staining and immunohistochemical staining. Results On the 7th and 9th days after injection, the tumors were observed in the submental group and the axillary group. On the 33rd day after injection, the tumor volume in the ax-FADU and ax-HN31 groups was significantly bigger than those in the sub-FADU and sub-HN31 groups (P<0.05, P<0.01). The body mass of nude mice in each group reached peak on the 17th to 19th days after injection, and thereafter the body mass in the submental group was gradually decreased and that in the axillary group was still increased. On the 33rd day after injection, the body mass in the ax-FADU and ax-HN31 groups were significantly higher than those in the sub-FADU and sub-HN31 groups, respectively (P<0.01). After eight weeks, there were eight deaths in the sub-FADU group and 10 in the sub-HN31 group, with six mice alive in the submental group; there were six deaths in the ax-FADU group and six in the ax-HN31 group, with 12 alive in the axillary group. There was no significant difference in mortality of nude mice between the four subgroups. Ultrasound and pathological examination showed that four survived nude mice were found with cervical lymph node and liver metastases in the submental group, and only one was found with liver metastases in the axillary group; and the difference between the two groups was statistically significant (P<0.05). There were two pulmonary metastases in the submental group, and one in the axillary group; there was one spleen metastases in the submental group and no spleen metastases in the submental group; and there were no significant differences between the two groups. Conclusion Submental tumorigenesis model and axillary tumorigenesis model have their own characteristics. The submental tumorigenesis model has shorter tumorigenesis time, higher local invasion and higher distant metastasis rate, and is suitable for studying the invasiveness and metastasis of tumor in vivo. The axillary tumorigenesis model has larger volume of tumor, less injury to the adjacent organs and tissues, longer survival time and lower distant metastasis rate, and is suitable for the study of the characteristics of tumor cells.

Effect of vardenafil pretreatment on the activity of post-thaw sperm / 上海交通大学学报（医学版）

Objective: To explore the effect of vardenafil pretreatment on the post-thaw sperm activity. Methods: Semen samples were randomly collected from 30 donors in Shanghai Human Sperm Bank. Then, each semen sample was aliquoted into six parts. One was immediately assayed for sperm activity without any treatment as the original control. The other five parts were incubated with vardenafil at 0, 0.4, 4.0, 40.0, and 400.0 μg/mL respectively for five minutes. The protective agent was added according to the semen: protective agent ration (2: 1), and the fumigation method was used for cryopreservation. After thawing, each specimen was examined for various parameters, including progressive motility, total motility and normal sperm morphology. Results: After thawing, the progressive sperm rates were (41.47±9.80)%, (42.57±9.60)%, (47.77±8.55)%, (37.27±8.47)%, and (26.37±6.99)% in the groups treated with 0, 0.4, 4.0, 40.0, and 400.0 μg/mL of vardenafil, respectively. Compared to the control group (0 μg/mL of vardenafil), 4.0 μg/mL of vardenafil could significantly improve the post-thaw sperm motility (P=0.034). Conclusion: Vardenafil pretreatment can improve the activity of the postthaw sperm; however, it may be toxic to sperm at the high concentration.

Porphyromonas gingivalis infection induced reproductive abnormalities in mice / 解放军医学杂志

Objective To establish a pregnant mouse model infected with Porphyromonas gingivalis (P.g), and investigate the relationship of P.g infection to prematurity and associated birth abnormalities. Methods Fifty two female mice were randomly divided into P.g infection group (n=26) and control group (n=26). Mice in P.g infection group were anesthetized, the pulp cavity of the first molar was opened and directly injected with W83 strain P.g, and the tooth was then filled. Six weeks after infection, the mice were mated with males and the formation of vagina plug was recorded as 0d. The P.g extracted from the granulation tissue in tooth root was cultivated. The pregnant days and the connatal body weight of infant mouse were recorded, the serum and placental tissue were collected to assess the systemic and local conditions during pregnancy. Results After periodontal P.g infection, the TNF-α, IL-17, IL-6 and IL-1 levels in peripheral blood sera increased significantly. The average gestation was shorter in P.g infection group (18.25d) than in control group (20.45d, P<0.01), and the connatal body weight of infant mouse was also less in the former than in the latter (P<0.01). Immunohistochemistry and PCR revealed the existence of P.g in placenta tissue. P.g infection caused premature rupture of membranes, placental abruption, degeneration and necrosis of trophoblastic and endothelial cells; significantly increased the number of neutrophils and macrophages in placenta tissues, and increased the expression of local TNF-α and COX-2 inflammatory factors at the same time. In P.g infection group, the expressions of CD-31 in endothelial cells of placenta tissues and the apoptotic factor caspase-3 decreased, and the DNA oxidative damage index 8-OHdG increased. Conclusions P.g infection in female mice may cause premature birth and lower connatal body weight of infant mouse, and increase the expression of serous and local inflammatory factors in the placenta. It is suggested that timely removal of periodontitis or gingivitis can prevent some of reproductive abnormalities.

Effect of extract of radix tetrastigma hemsleyani on apoptosis of human lung carcinoma H1299 cells and its mechanism study / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the effect of extract of Radix Tetrastigma hemsleyani on the proliferation and apoptosis of human lung carcinoma H1299 cells, and to explore its mechanisms. METHODS H1299 cells were treated with the extract of Radix Tetrastigma hemsleyani in different concentrations at different time points. Its inhibition on H1299 cell proliferation was detected by Cell Counting Kit-8 (CCK-8) assay. The morphology of the H1299 cell was observed by inverted microscope. Changes of apoptosis were observed by Hoechst33258 methods. The apoptosis rate was detected by flow cytometry. Expression changes of apoptosis-related proteins pro-caspase-3, pro-caspase-9, cle-caspase-3, cle-caspase-9, and poly-ADP-ribose polymerase (PARP) were detected by Western blot.</p><p><b>RESULTS</b>Compared with the control group, the inhibition rate of H1299 cells increased after acted by 0.5, 1, 5, and 10 mg/mL extract of Radix Tetrastigma hemsleyani (P < 0.05, P < 0.01). The longer the acting time, the higher the inhibition rate (P < 0.01). Under inverted microscope, typical morphological changes could be seen and the number of H1299 cells was reduced. Under fluorescence microscope, dark stained nucleus and formed apoptotic body could be observed. Results of flow cytometry showed that the apoptosis rate was obviously dose-effect correlated with the concentration of extract of Radix Tetrastigma hemsleyani. Results of Western blot indicated that compared with the control. group, the protein expression of pro-caspase-3, pro-caspase-9, and PARP were down-regulated and that of cle-caspase-3, cle-caspase-9, and cle-PARP were up-regulated by 5 and 10 mg/mL extract of Radix Tetrastigma hemsleyani (P < 0.05).</p><p><b>CONCLUSIONS</b>Extract of Radix Tetrastigma hemsleyani had obvious effect in inhibiting the proliferation and inducing apoptosis of human lung carcinoma H1299 cells, which might be achieved by activating the expression of caspase protein.</p>

Post-thaw sperm functions of high- and low-fertility sperm donors: a comparative study of 40 cases / 中华男科学杂志

<p><b>OBJECTIVE</b>To investigate sperm function indexes that can be used to effectively evaluate the sperm donors' fertility so as to select healthy post-thaw semen samples and improve the success rate of assisted reproductive technology.</p><p><b>METHODS</b>According to the pregnancy outcomes, we divided 40 donor semen samples into a high-fertility group (n = 20) and a low-fertility group (n = 20). We measured and compared the concentration, progressive motility, morphology, acrosome intactness, DNA integrity and mitochondrial membrane potential (MMP) of the post-thaw sperm between the two groups.</p><p><b>RESULTS</b>There were statistically significant differences between the high- and low-fertility groups in the percentages of morphologically normal sperm ([18.50 +/- 6.10]% vs [14.42 +/- 6.44]%, P < 0.01), acrosome intactness ([86.17 +/- 4.49]% vs [80.04 +/- 7.52]%, P < 0.05) and DNA fragmentation index ([9.21 +/- 3.22]% vs [15.72 +/- 8.20]%, P < 0.05), but not in MMP ([56.75 +/- 18.80]% vs [52.23 +/- 18.86]%, P > 0.05). A significantly positive correlation was found between MMP and sperm motility (r = 0.760, P < 0.05), but not between other sperm functions and sperm concentration and motility.</p><p><b>CONCLUSION</b>Sperm concentration, motility, morphology, acrosome intactness rate and DNA integrity contribute effectively to the evaluation of the fertilization capacity of post-thaw donor semen samples.</p>

Determination of the content of residual solvents in Haikesu I by head-space gas chromatography / 中国医学科学院学报

<p><b>OBJECTIVE</b>To explore the usefulness of head-space gas chromatography for the determination of methanol and ethanol in Haikesu I,a raw material of artificial musk.</p><p><b>METHODS</b>The determination was performed on HP-5(30 m×0.53 mm,5 Μm)capillary column with an hydrogen flame ionization detector. The solvent was dimethyl sulfoxide and the internal standard was acetone. The injector temperature and the detector temperature were controlled at 180 ℃ and 250 ℃,respectively. The carrier gas was nitrogen. The containers of head-space injector were preheated at 90 ℃ for 15 minutes. The column temperature was programmed raised,which achieved baseline separation of the components.</p><p><b>RESULTS</b>The results showed a good linear relationship for methanol and ethanol in their linearity range;and the limit of detection was 0.8 and 1.0 Μg/ml,respectively. The precision and average recoveries were satisfactory.</p><p><b>CONCLUSION</b>The head-space gas chromatography is simple,rapid,and precise technique for the measurement of residual solvents in Haikesu I.</p>

Determination of the content of residual solvents in Haikesu 2 by head-space gas chromatography / 中国医学科学院学报

<p><b>OBJECTIVE</b>To determine ethylacetate and petroleum ether(60-90 ℃)in Haikesu 2,which is one of the raw materials of artificial musk,using the head-space gas chromatography.</p><p><b>METHODS</b>The determination was performed on HP-5(30 m×0.53 mm,5 Μm)capillary column with an hydrogen flame ionization detector. The solvent was dimethyl sulfoxide and the internal standard was methanol. The injector temperature and the detector temperature were controlled at 180 ℃ and 250 ℃,respectively. The carrier gas was nitrogen. The containers of head-space injector were preheated at 90 ℃ for 15 minutes. The column temperature was programmed raised,which achieved baseline separation of the components.</p><p><b>RESULTS</b>The results showed a good linear relationship for ethylacetate and petroleum ether(60-90 ℃)in their linearity range;and the limit of detection was 0.7 and 0.3 Μg/ml,respectively. The good precision and good average recoveries were satisfactory.</p><p><b>CONCLUSION</b>The head-space gas chromatography is simple,rapid,and precise technique for the measurement of residual solvents in Haikesu 2.</p>

Determination of the content of residual solvents in muscone by head-space gas chromatography / 中国医学科学院学报

<p><b>OBJECTIVE</b>To explore the usefulness of a head-space gas chromatography in the determination of residual solvents including methanol,ethanol,ethyl ether,and petroleum ether in muscone in artificial musk.</p><p><b>METHODS</b>The head-space gas chromatography was performed on HP-5(30 m×0.53 mm,5 Μm)capillary column with a hydrogen flame ionization detector. The carrier gas was nitrogen and the solvent was dimethyl sulfoxide. The injector temperature and the detector temperature were controlled at 180 ℃ and 250 ℃,respectively. The containers of head-space injector were preheated at 80 ℃ for 15 minutes. The column temperature was programmed raised,which achieved baseline separation of the components.</p><p><b>RESULTS</b>The results showed a good linear relationship for methanol,ethanol,ethyl ether,and petroleum ether(60-90 ℃)in the range of each consistency; and the limit of detection was 0.8,1.0,0.1,and 0.3 Μg/ml,respectively. The precision and average recoveries were satisfactory.</p><p><b>CONCLUSION</b>The head-space gas chromatography is simple,rapid,and precise technique for measuring residual solvents in muscone.</p>

Spectrum and management of dyslipidemia among children and adolescent / 中华实用儿科临床杂志

Dyslipidemia has emerged as a major health problem in children and adolescent.Except for primary familial dyslipidemia,secondary dyslipidemia caused by obesity,metabolic syndrome and unhealthy life-style is increasingly prevalent in recent years.Life-style modification,such as dietary intervention and increasing physical activity,should be considered firstly for treating dyslipidemia in children and adolescent.Application of pharmacologic agents should follow strict indications including ages and types of dyslipidemia.

A Fatal Case of Naegleria fowleri Meningoencephalitis in Taiwan

After bathing at a hot spring resort, a 75-year-old man presented to the emergency department because of seizure-like attack with loss of conscious. This is the first case of primary amebic meningoencephalitis (PAM) caused by Naegleria fowleri in Taiwan. PAM was diagnosed based on detection of actively motile trophozoites in cerebrospinal fluid using a wet-mount smear and the Liu's stain. The amoebae were further confirmed by PCR and gene sequencing. In spite of administering amphotericin B treatment, the patient died 25 days later.

Expression of plasminogen activator inhibitor-2 is negatively associated with invasive potential in hepatocellular carcinoma cells / 中国医学科学杂志(英文版)

<p><b>OBJECTIVE</b>To investigate the association between plasminogen activator inhibitor (PAI)-2 expression and invasive potential in hepatocellular carcinoma (HCC) cells.</p><p><b>METHODS</b>The HCC cell lines with high, low, and non-metastatic potentials, namely MHCC97-H, MHCC97-L, and SMMC-7721 respectively, were cultured in vitro. Matrigel invasion assay and Western blot of PAI-2 protein expression were conducted.</p><p><b>RESULTS</b>The number of invaded cells in MHCC97-L was significantly higher than that in SMMC-7721 (P=0.005), whereas that in MHCC97-H was higher than in MHCC97-L (P=0.017) and SMMC-7721 (P=0.001). Contrarily, PAI-2 protein expression was gradually reducing from SMMC-7721, MHCC97-L, to MHCC97-H (MHCC97-H vs. MHCC97-L, P<0.001; MHCC97-H vs. SMMC-7721, P=0.001; MHCC97-L vs. SMMC-7721, P=0.001). The Pearson's correlation analysis revealed a significant negative association between invaded cell number and PAI-2 expression (r=-0.892, P=0.001).</p><p><b>CONCLUSION</b>PAI-2 expression may be negatively associated with the invasive potential of HCC.</p>