Postmortem Interval Estimation Using Protein Chip Technology Combined with Multivariate Analysis Methods / 法医学杂志

OBJECTIVES@#To estimate postmortem interval (PMI) by analyzing the protein changes in skeletal muscle tissues with the protein chip technology combined with multivariate analysis methods.@*METHODS@#Rats were sacrificed for cervical dislocation and placed at 16 ℃. Water-soluble proteins in skeletal muscles were extracted at 10 time points (0 d, 1 d, 2 d, 3 d, 4 d, 5 d, 6 d, 7 d, 8 d and 9 d) after death. Protein expression profile data with relative molecular mass of 14 000-230 000 were obtained. Principal component analysis (PCA) and orthogonal partial least squares (OPLS) were used for data analysis. Fisher discriminant model and back propagation (BP) neural network model were constructed to classify and preliminarily estimate the PMI. In addition, the protein expression profiles data of human skeletal muscles at different time points after death were collected, and the relationship between them and PMI was analyzed by heat map and cluster analysis.@*RESULTS@#The protein peak of rat skeletal muscle changed with PMI. The result of PCA combined with OPLS discriminant analysis showed statistical significance in groups with different time points (P<0.05) except 6 d, 7 d and 8 d after death. By Fisher discriminant analysis, the accuracy of internal cross-validation was 71.4% and the accuracy of external validation was 66.7%. The BP neural network model classification and preliminary estimation results showed the accuracy of internal cross-validation was 98.2%, and the accuracy of external validation was 95.8%. There was a significant difference in protein expression between 4 d and 25 h after death by the cluster analysis of the human skeletal muscle samples.@*CONCLUSIONS@#The protein chip technology can quickly, accurately and repeatedly obtain water-soluble protein expression profiles in rats' and human skeletal muscles with the relative molecular mass of 14 000-230 000 at different time points postmortem. The establishment of multiple PMI estimation models based on multivariate analysis can provide a new idea and method for PMI estimation.

Mechanism of action of exosomes in the development and progression of hepatitis B virus-related chronic hepatitis and hepatocellular carcinoma / 临床肝胆病杂志

Exosomes (EXOs) are formed by intracellular multivesicular bodies and carry a variety of biomacromolecules such as lipids, proteins, encoding and non-coding RNAs, and mitochondrial DNA. EXOs can be released in vivo by different cell types, including hepatocytes, hepatic stellate cells, and immune cells and play the role of intercellular communication. More and more studies have shown that EXOs are involved in the development, progression, and prognosis of chronic hepatitis B (CHB) and hepatocellular carcinoma (HCC) caused by hepatitis B virus (HBV) infection and are expected to become potential biomarkers for the early diagnosis and prognostic evaluation of HBV-related HCC. This article reviews the role of EXOs in the host infection process of HBV and the importance of EXOs in the development, progression, and prognosis of CHB and HCC, in order to provide new ideas for the basic and clinical research in this field.

Application of Linear Regression Model of Gpnmb Gene in Rat Injury Time Estimation / 法医学杂志

OBJECTIVES@#To investigate the effects of injury time, postmortem interval (PMI) and postmortem storage temperature on mRNA expression of glycoprotein non-metastatic melanoma protein B (Gpnmb), and to establish a linear regression model between Gpnmb mRNA expression and injury time, to provide aimed at providing potential indexes for injury time estimation.@*METHODS@#Test group SD rats were anesthetized and subjected to blunt contusion and randomly divided into 0 h, 4 h, 8 h, 12 h, 16 h, 20 h and 24 h groups after injury, with 18 rats in each group. After cervical dislocation, 6 rats in each group were collected and stored at 0 ℃, 16 ℃ and 26 ℃, respectively. The muscle tissue samples of quadriceps femoris injury were collected at 0 h, 12 h and 24 h postmortem at the same temperature. The grouping method and treatment method of the rats in the validation group were the same as above. The expression of Gpnmb mRNA in rat skeletal muscle was detected by RT-qPCR. The Pearson correlation coefficient was used to evaluate the correlation between Gpnmb mRNA expression and injury time, PMI, and postmortem storage temperature. SPSS 25.0 software was used to construct a linear regression model, and the validation group data was used for the back-substitution test.@*RESULTS@#The expression of Gpnmb mRNA continued to increase with the prolongation of injury time, and the expression level was highly correlated with injury time (P<0.05), but had little correlation with PMI and postmortem storage temperature (P>0.05). The linear regression equation between injury time (y) and Gpnmb mRNA relative expression (x) was y=0.611 x+4.489. The back-substitution test proved that the prediction of the model was accurate.@*CONCLUSIONS@#The expression of Gpnmb mRNA is almost not affected by the PMI and postmortem storage temperature, but is mainly related to the time of injury. Therefore, a linear regression model can be established to infer the time of injury.

Research advances in intestinal flora and the development and prognosis of chronic hepatitis B / 临床肝胆病杂志

Intestinal flora is closely associated with chronic hepatitis B (CHB). Recent studies have shown that the imbalance of intestinal flora is associated with the development, progression, and prognosis of CHB, and the environment of intestinal flora may also change with disease progression, suggesting that intestinal flora and CHB interact with each other. This article reviews the influence of intestinal flora on the progression of CHB and related liver diseases and the role of intestinal flora regulation in the diagnosis and treatment of CHB and related liver diseases, in order to provide new ideas for the clinical treatment of CHB.

Application Prospects and Prospect of Metabolomics in the Identification of Sudden Cardiac Death / 法医学杂志

In cases of sudden death, the prevention of sudden cardiac death and the analysis of the cause of death after sudden cardiac death have always been a difficult problem. Therefore, clinical research and forensic pathological identification of sudden cardiac death are of great significance. In recent years, metabolomics has gradually developed into a popular field of life science research. The detection of "metabolic fingerprints" of biological fluids can provide an important basis for early diagnosis of diseases and the discovery of potential biomarkers. This article reviews the current research status of sudden cardiac death and the research on metabolomics of cardiovascular diseases that is closely related to sudden cardiac death and analyzes the application prospects of metabolomics in the identification of the cause of sudden cardiac death.

Correlation between the Polymorphism of Coagulation-Related Genes and Lower Extremity Deep Venous Thrombosis / 法医学杂志

Objective To investigate the correlation between the polymorphism of 4 coagulation-related genes, rs1799963 （coagulation factor V gene Leiden）, rs6025 （prothrombin gene G20210A）, rs1042579 （thrombomodulin protein gene c.1418C>T） and rs1801131 （methylenetetrahydroflate reductase gene） and lower extremity deep venous thrombosis （LEDVT）. Methods The 4 genotypes mentioned above of 150 LEDVT patients and 153 healthy controls were detected by the kompetitive allele specific polymerase chain reaction （KASP）, then related blood biochemical indicators were collected, binary Logistic regression was established to screen the independent risk factors of LEDVT, and the correlation between polymorphism of 4 coagulation-related genes and LEDVT and its indicators under different genetic modes after adjusting confounding factors were analyzed. Results Five variables, D-dimer, fibrinogen degradation product, homocysteine, sex and age might be the risk factors of LEDVT. These variables were put into 4 genetic inheritance models, and adjusted in binary Logistic regression. The results suggested that the mutations of rs1042579 were correlated with LEDVT under dominant inheritance mode. Conclusion The gene polymorphism of rs1799963, rs6025 and rs1801131 has no significant correlation with the formation of LEDVT. The gene polymorphism of rs1042579 plays a role under dominant inheritance mode, and might be an independent risk factor for formation of LEDVT.

Emodin alleviates hypertrophic scar formation by suppressing macrophage polarization and inhibiting the Notch and TGF-β pathways in macrophages

Hypertrophic scar (HS) formation is a common complication that develops after skin injury; however, there are few effective and specific therapeutic approaches for HS. Emodin has previously been reported to inhibit mechanical stress-induced HS inflammation. Here, we investigated the molecular mechanisms underlying the inhibitory effects of emodin on HS formation. First, we conducted in vitro assays that revealed that emodin inhibited M1 and M2 polarization in rat macrophages. We subsequently established a combined rat model of tail HS and dorsal subcutaneous polyvinyl alcohol (PVA) sponge-induced wounds. Rats were treated with emodin or vehicle (DMEM). Tail scar specimens were harvested at 14, 28, and 42 days post-incision and subjected to H&E staining and Masson's trichrome staining. Histopathological analyses confirmed that emodin attenuated HS formation and fibrosis. Macrophages were separated from wound cells collected from the PVA sponge at 3 and 7 days after implantation. Flow cytometry analysis demonstrated that emodin suppressed in vivo macrophage recruitment and polarization at the wound site. Finally, we explored the molecular mechanisms of emodin in modulating macrophage polarization by evaluating the expression levels of selected effectors of the Notch and TGF-β pathways in macrophages isolated from PVA sponges. Western blot and qPCR assays showed that Notch1, Notch4, Hes1, TGF-β, and Smad3 were downregulated in response to emodin treatment. Taken together, our findings suggested that emodin attenuated HS formation and fibrosis by suppressing macrophage polarization, which is associated with the inhibition of the Notch and TGF-β pathways in macrophages.

Comparative study of femoral head replacement and internal fixation in the treatment of unstable intertrochanteric fractures in the elderly / 中国骨伤

OBJECTIVE@#To compare the clinical efficacy of femoral head replacement and internal fixation in the treatment of unstable intertrochanteric fractures in the elderly.@*METHODS@#Retrospective analysis of 70 cases of unstable intertrochanteric fractures treated from January 2016 to January 2019 and meeting the inclusion and exclusion criteria, 39 cases were fixed with closed reduction and new proximal femoral intramedullary nail(InterTAN), and 31 cases were treated with open trochanter reconstruction and artificial femoral head replacement. The operation time, intraoperative bleeding, hospital stay, weight bearing time, postoperative complication rate and hip function recovery (Harris score) were compared between two groups.@*RESULTS@#All cases were followed up for 12 to 24 months. There were no significant differences in intraoperative bleeding and hospital stay between the two groups (@*CONCLUSION@#InterTAN and femoral head replacement can treat unstable intertrochanteric fractures in the elderly, but femoral head replacement can move down early, improve the quality of life at the end of life, reduce postoperative complications and facilitate the treatment of coexisting diseases in internal medicine.

Clinical Efficiency of Rituximab Combined with Autologous Hematopoietic Blood Stem Cell Transplantation for Treatment of CD20 / 中国实验血液学杂志

METHODS@#From January 2005 to December 2013, 83 patients with refractory/recurrent CD20@*RESULTS@#All the patient achieved complete response. The median follow.up time was 39 months. Both the two groups collected peripheral blood stem cells successfully, and had no difference in hematopoietic reconstitution time. Three patients in treatment group and six patients in control group relapsed and the three year overall survival and EFS in treatment group was significantly higher than that in control group, that is（93.0% vs 73.1%, P=0.037） and （89.5% vs 65.4%, P=0.034）, respectively. Subgroup analysis showed that: compared with the treatment group in which using R in the whole courses(before and after transplantation, and collection of stem cells) was superior to the control group in both OS and EFS, with the OS 97% vs 87.5% (P>0.05) and EFS 97% vs 76.2% (P=0.05) respectively. While stratified by the different courses of rituximab, the OS was 88.9% (1-2 courses, 9 cases), 93.1% (3-4 courses, 29 cases), 94.7%(more than 5 courses,19 cases), and EFS was 77.8%, 89.7% and 94.7%, respectively.@*CONCLUSION@#For the patients with refractory/recurrent CD20

Analysis of semen quality of 38 905 infertile male patients during 2008-2016 in Wenzhou, China / 亚洲男科学杂志(英文版)

This study analyzed the trend in semen quality of infertile male patients in Wenzhou, China, based on the data obtained from 38 905 patients during 2008-2016 in The First Affiliated Hospital of Wenzhou Medical University (Wenzhou, China). The results showed that only 24.9% of the patients had normal semen quality. For the semen quality of infertile male patients, that of the workers and 40-year-olds was significantly worse than the other occupational and age groups. For all the infertile patients, low semen volume, asthenozoospermia, and teratozoospermia accounted for 8.4%, 50.5%, and 54.1%, respectively. During 2008-2016, the annual mean percentage of fast forward motile spermatozoa, percentage of total forward motile spermatozoa, and percentage of spermatozoa with normal morphology decreased linearly with slopes of -2.11, -2.59, and -0.70, respectively. The proportion of patients with asthenozoospermia and multi-abnormal spermatozoa increased during 2008-2016 with slopes of 4.70 and 4.87, respectively, while for low semen volume, it decreased with a slope of -0.47 in the same time period. The proportion of patients with teratozoospermia increased from 2008 to 2011 and from 2011 to 2016 with slopes of 17.10 and 2.09, respectively. In general, the deteriorating trend of semen quality of infertile male patients in Wenzhou was obvious. Future efforts should be made to reveal the adverse influences on semen quality, such as occupational exposure, environmental quality, and living habits. Furthermore, more pervasive reproduction health education is necessary.

Progress in Application of Population Pharmacokinetic and Pharmacodynamic Models in Research on Traditional Chinese Medicine / 中国实验方剂学杂志

In recent years， the role of quantitative pharmacological models in applicable population of drugs and dose optimization has been widely recognized. In order to improve the efficiency of clinical development and optimize clinical rational drug use， quantitative pharmacological models are being gradually introduced into the research of traditional Chinese medicine （TCM）. There are various types of quantitative pharmacological models， among which the following three models are commonly used：①Population pharmacokinetic （PPK） model， which is mainly used to explore the pharmacokinetic characteristics in different populations.②Pharmacokinetic-pharmacodynamic （PK-PD） model， which is used to reveal the internal relationship among dose， time and efficacy. ③PPK-PD model， which integrates both the characteristics of PPK model and PK-PD model. The paper summarizes the application of the above three models in TCM， and extracts the main ideas and methods of TCM model research， in order to provide reference for clinical research and rational use of TCM.

Estimating Postmortem Interval by Protein Chip Detection Technology Combined with Multidimensional Statistics / 法医学杂志

Objective To obtain the protein expression profile of rat liver tissue after death by the 2100 bioanalyzer combined with protein chip, and infer the relationship between protein expression profile and postmortem interval. Methods Rats were killed by abdominal anesthesia and placed at 16 ℃. Water-soluble proteins in liver tissues were extracted at 14 time points after death. The expression profile data of proteins with relative molecular weight of 14 000-230 000 were obtained using protein chip, and principal component analysis （PCA）, partial least squares-discriminant analysis （PLS-DA） and Fisher discriminant were used to analyze the data. Results According to the changes of protein expression profile, the postmortem interval was divided into group A （0 d）, group B （1-9 d）, group C （12-30 d） according to the result of PLS-DA. The prediction accuracy of the training set and test set of the model were all 100.0%, and the internal cross-validation of the training set was 100.0% according to Fisher discriminant. The Fisher discriminant model at each time point of group B and C was established to narrow the time window of postmortem interval estimation. The prediction accuracy of the training set and test set were all 100.0%, and the internal cross-validation accuracy of the training set was 100.0% in group B. The prediction accuracy of the training set and test set were respectively 95.2% and 78.6% in group C, and the internal cross-validation of the training set was 88.1%. Conclusion Protein chip detection technology can quickly and easily obtain the expression profile of water-soluble proteins of rat liver tissue with a relative molecular weight of 14 000-230 000 at different time points after death. PLS-DA and Fisher discriminant models are established to classify and predict the postmortem interval, in order to provide new ideas and methods for postmortem interval estimation.

Gray matter atrophy in parkinsons disease and the parkinsonian variant of multiple system atrophy: a combined roi- and voxel-based morphometric study

OBJECTIVES: Parkinson's disease (PD) and the parkinsonian variant of multiple system atrophy (MSA-P) are distinct neurodegenerative disorders that share similar clinical features of parkinsonism. The morphological alterations of these diseases have yet to be understood. The purpose of this study was to evaluate gray matter atrophy in PD and MSA-P using regions of interest (ROI)-based measurements and voxel-based morphometry (VBM). METHODS: We studied 41 patients with PD, 20 patients with MSA-P, and 39 controls matched for age, sex, and handedness using an improved T1-weighted sequence that eased gray matter segmentation. The gray matter volumes were measured using ROI and VBM. RESULTS: ROI volumetric measurements showed significantly reduced bilateral putamen volumes in MSA-P patients compared with those in PD patients and controls (p<0.05), and the volumes of the bilateral caudate nucleus were significantly reduced in both MSA-P and PD patients compared with those in the controls (p<0.05). VBM analysis revealed multifocal cortical and subcortical atrophy in both MSA-P and PD patients, and the volumes of the cerebellum and temporal lobes were remarkably reduced in MSA-P patients compared with the volumes in PD patients (p<0.05). CONCLUSIONS: Both PD and MSA-P are associated with gray matter atrophy, which mainly involves the bilateral putamen, caudate nucleus, cerebellum, and temporal lobes. ROI and VBM can be used to identify these morphological alterations, and VBM is more sensitive and repeatable and less time-consuming, which may have potential diagnostic value.

The role and mechanism of leucyl-tRNA synthetase in the regulation of protein synthesis in aging skeletal muscle / 生理学报

The imbalance of protein metabolism is the major cause of skeletal muscle atrophy, and the decrease of protein synthesis directly leads to the occurrence and development of age-related sarcopenia. The canonical role of leucyl-tRNA synthetase (LeuRS) is ligating leucine to the cognate tRNA, and thus it plays a central role in genetic coding. With the further studies of LeuRS in recent years, LeuRS has been found to control protein homeostasis in aging skeletal muscle via its non-canonical role. In this paper, we reviewed the structure and biological features of aminoacyl-tRNA synthetase and LeuRS, and summarized the recent advances in studies on the effects of LeuRS in regulating aging skeletal muscle protein synthesis as an intracellular leucine sensor. Moreover, we also analyzed the potential role of LeuRS in activation of mammalian target of rapamycin complex 1 (mTORC1) signaling transduction pathway in response to anabolic stimuli such as exercise and amino acids ingestion. This paper may provide some new ideas for the prevention, diagnosis and treatment of age-related sarcopenia.

Impact of hepatitis C virus genotype 3 on liver disease progression in a Chinese national cohort / 中华医学杂志(英文版)

BACKGROUND@#Hepatitis C virus (HCV) genotype 3, particularly subtype 3b, is increasing in prevalence and distribution in China. This study evaluated the prevalence, regional distribution, clinical characteristics, host factors, treatment outcomes, and disease progression of patients with HCV genotype 3 in China.@*METHODS@#A 5-year follow-up was preceded by a cross-sectional study. Treatment choices were at the discretion of treating physicians. Estimated infection time to overall-disease-progression (defined by ≥1 of: newly diagnosed cirrhosis; cirrhosis at baseline, Child-Turcotte-Pugh score increased 2 points or more; progression from compensated cirrhosis to decompensated cirrhosis; hepatocellular carcinoma; liver transplantation; or death) was calculated using the Kaplan-Meier method. Cox regression analyses were conducted to evaluate the risk factors for disease progression.@*RESULTS@#The cross-sectional study enrolled 997 patients, including 91 with HCV genotype 3 infection. Among them, subtype 3b (57.1%) was more dominant than subtype 3a (38.5%). Five hundred and twelve patients were included into the follow-up phase. Among patients analyzed for estimated infection time to overall-disease-progression, 52/304 (17.1%) patients with HCV genotype 1 and 4/41 (9.8%) with HCV genotype 3 (4/26 with genotype 3b, 0/13 with genotype 3a, and 0/2 with undefined subtype of genotype 3) experienced overall-disease-progression. Patients with HCV genotype 3 were younger than those with genotype 1 (mean age: 39.5 ± 8.7 vs. 46.9 ± 13.6 years) and demonstrated more rapid disease progression (mean estimated infection time to overall-disease-progression 27.1 vs. 35.6 years).@*CONCLUSIONS@#HCV genotype 3, specifically subtype 3b, is associated with more rapid progression of liver disease. Further analysis to compare HCV subtype 3a and 3b is needed in high prevalence regions.@*TRIAL REGISTRATION@#NCT01293279, https://clinicaltrials.gov/ct2/show/NCT01293279; NCT01594554, https://clinicaltrials.gov/ct2/show/NCT01594554.

A double-blind, randomized, placebo- and positive-controlled phase III trial of 1% benvitimod cream in mild-to-moderate plaque psoriasis / 中华医学杂志(英文版)

BACKGROUND@#Benvitimod cream, a novel synthetic small molecule, was effective in treating mild-to-moderate plaque psoriasis. We conducted a phase III clinical trial to assess the efficacy and safety of benvitimod cream in patients with mild-to-moderate plaque psoriasis.@*METHODS@#We randomly assigned 686 patients (2:1:1) to receive 1% benvitimod cream, 0.005% calcipotriol ointment or placebo twice a day for 12 weeks. The primary efficacy end points were the percentage of patients with a 75% or greater reduction from baseline in the psoriasis area and severity index (PASI 75) score and with a score of 0 or 1 in static physician's global assessment (sPGA) at week 12.@*RESULTS@#The results showed that 50.4% of patients in the benvitimod group achieved PASI 75, which was significantly higher than that in the calcipotriol (38.5%, P < 0.05) and placebo (13.9%, P < 0.05) groups. The proportion of patients achieving an sPGA score 0 or 1 was 66.3% in the benvitimod group and 63.9% in the calcipotriol group, which were both significantly higher than that in the placebo group (34%, P < 0.05). In the long-term follow-up study, 50.8% of patients experienced recurrence. After retreatment with 1% benvitimod, 73.3% of patients achieved an sPGA score of 0 or 1 again at week 52. Adverse events included application site irritation, follicular papules, and contact dermatitis. No systemic adverse reactions were reported.@*CONCLUSION@#During this 12-week study, benvitimod cream was demonstrated with high effectiveness and safety in patients with mild-to-moderate plaque psoriasis.@*TRIAL REGISTRATION@#Chinese Clinical Trial Registry (ChiCTR), ChiCTR-TRC-13003259; http://www.chictr.org.cn/showprojen.aspx?proj=6300.

Study on Urinary Metabolic Profile in Rats with Deep Venous Thrombosis Based on Pattern Recognition / 法医学杂志

OBJECTIVES@#To study the urinary metabolic profile in rats with deep venous thrombosis （DVT） based on metabolomics and to screen out small molecular biomarkers for the diagnosis and forensic identification of DVT.@*METHODS@#Inferior vena cava of rats was ligated to construct DVT models. The rats were randomly divided into three groups： DVT, sham, and control groups, 10 in each group. The urine of DVT and sham rats was collected during 24 hours in the metabolic cage at 48 hours after operating, meanwhile, 24 hours urine was collected in control group. The metabolic profile was analyzed by nuclear magnetic resonance. SIMCA-P 14.1 software was used for pattern recognition. The variable importance in projection （VIP） value from orthogonal PLS-DA （OPLS-DA） model combined with Mann-Whitney U test were used to search the different metabolites in the urine.@*RESULTS@#The metabolic profiles of urine from DVT, sham, and control groups had significant differences. The DVT, sham, and control groups could be distinguished by the partial least squares method-discriminant analysis （PLS-DA） model. Compared with the urine of the rats in control groups, the levels of leucine, glutamine, creatine, creatinine and sucrose in the urine of DVT rats were up-regulated, and the levels of 3-hydroxybutyrate, lactate, acetone, α-oxoglutarate, citrate and hippurate were down-regulated.@*CONCLUSIONS@#The different metabolites in the urine of DVT rats are expected to become its candidate biomarkers. The results can provide a research basis for the diagnosis, treatment and forensic identification of DVT.

Laparoscopic splenectomy: a new approach

OBJECTIVES: To introduce a new laparoscopic splenectomy (LS) approach. METHODS: Sixteen patients underwent LS with general anaesthesia and carbon dioxide pneumoperitoneum. The details of the surgery are as follows: 1. The omentum was incised along the greater curvature and retracted as much as possible to expose the pancreatic body and tail. 2. The right arteriovenous root in the gastric omentum was ligated to sufficiently expose the pancreatic body and tail. 3. The pancreatic capsula was opened along the inferior margin of the pancreatic tail, elevated and separated until the superior margin of the pancreas was grasped. The entire splenic pedicle was retracted using a string. The branching blood vessels in the splenic hilus were ligated using clamps and separated. The splenogastric and splenophrenic ligaments were transected proximally using an ultrasonic knife, and the thick short gastric blood vessels were clamped. This procedure allows complete exposure of the area above the pancreatic tail where the splenic hilus is located. The splenoportal vasculature was suspended using a 7-0 silk suture to easily manipulate this tissue. The splenic portal vessels were dissected using an ultrasonic knife, and the portal vessels were isolated individually using vascular clamps and transected. The splenogastric and lienorenal ligaments were also transected. The spleen was then placed into a bag, and the surgical port was slightly enlarged. Finally, the spleen was sectioned for removal. RESULTS: Fifteen surgeries were successfully performed from March 2015 to January 2016. One patient underwent laparotomy. No patients developed postoperative intra-abdominal haemorrhage or infection. One patient developed subcutaneous emphysema, and one developed a wound infection. No deaths occurred. CONCLUSIONS: Active exposure of the area dorsal to the pancreatic tail is a safe and simple splenectomy method.

Comprehensive evaluation of quality of Nardostachys Radix et Rhizoma and Nardostachys Herba by multidimensional statistical analysis / 中草药

Objective Based on the premise of wild resources protection of Nardostachys jatamansi, whether Nardostachys Herba (NH) could be equal to Nardostachys Radix et Rhizoma (NRR) specified in pharmacopeia for medical use or not, and to discuss the scientificity of using NH as the commodity specifications in market circulation. Methods The gray correlation, regression analysis and PCA, and HCA analysis were used to analysis the data, including the root length, plant height, dry weight, content of volatile oil, water-soluble extract, content of nardosine, moisture, total ash, acid-insoluble ash, etc., in order to comprehensively evaluate the quality of NH and NRR. Results The quality of NH and NRR were mainly correlated with the content of volatile oil and water soluble leach of NRR. Two variables corresponding to the dependent variable, aqueous extract and volatile oil, of total eight variables had significant influences between NH and NRR (P < 0.01). Conclusion The multidimensional statistical analysis of medicinal material quality illustrated an obvious difference between NH and NRR. It was conformed once again the NRR was to be the best for medical use, which was the same indexed regulations in different version of Chinese Pharmacopoeia. The NH was not absolutely substituted for NRR.

Preformulation study on antirheumatic drug DK-507 / 国际药学研究杂志

Objective To perform a preformulation study for a new antirheumatic drug DK-507 so as to provide theoretical basis for its preparation research.Methods The appearance,crystal form and solubility of DK-507 were investigated.A high perfor-mance liquid chromatography(HPLC)method for the quantitative determination of DK-507 was established.The apparent oil/water (O/W)partition coefficient of DK-507 and the equilibrium solubility of the drug under different pH conditions were determined. Re-sults DK-507 is a white crystalline powder,which is odorless,tasteless and insoluble in water.The quantitative HPLC method for the DK-507 determination showed a good linearity in the range of 10-80 μg/ml(R=0.9998).The apparent O/W partition coefficient of DK-507 was determined to be 1.80.In the different pH solutions,the solubility of DK-507 showed a W-form change,with poor solubili-ties in lower pH solutions,which showed a gradient improvement with the increase of the solution pH values.Conclusion The quanti-tative HPLC method for the DK-507 determination,established in this study,is accurate and reliable.The present results indicate that DK-507 is a water-insoluble drug,and according to the O/W partition coefficient,DK-507 seems likely to be prepared into oral solid preparations.