[Modeling and Predicting of MODIS Leaf Area Index Time Series Based on a Hybrid SARIMA and BP Neural Network Method].

The modeling and predicting of vegetation Leaf area index (LAI) is an important component of land surface model and assimilation of remote sensing data. The MODIS LAI product (i.e. MOD15A2) is one of the most widely used LAI data sources. However, the time series of MODIS LAI contains some data of low quality. For example, because of the influence of the cloud, aerosol, etc., the MODIS LAI presents the characteristics of the discontinuous in time and space. In fact, the time series of MODIS LAI include both linear and nonlinear components, which cannot be accurately modeled and predicted by either linear method or nonlinear method alone. In this paper, the original LAI time series data were first smoothed with Savitzky-Golay (SG) filtration and linear interpolation; SARIMA, BP neural network and a hybrid method of SARIMA-BP neural network were then used for modeling and predicting MODIS LAI time series. The SARIMA-BP neural network combined both SARIMA and BP neural network, which could model the linear and the nonlinear component of MODIS LAI time series respectively. That is, the final result of SARIMA-BP neural network was the sum of results of the two methods. Experiments showed that the time series of MODIS LAI that were smoothed with the SG filtration and linear interpolation were more smooth than original time series, with a determination coefficient up to 0.981, closer to 1 than that of SARIMA (0.941) and BP neural network (0.884); the correlation coefficient between SARIMA-BP neural network and the observation is 0.991, higher than that of between SARIMA (0.971) or BP neural network (0.942) SARIMA and the observation. Thus, it can be concluded that, the proposed SARIMA-BP neural network method can better adapt to the LAI time series, and it outperforms the SARIMA and BP neural network methods.

[Evaluating the utility of MODIS vegetation index for monitoring agricultural drought].

The exclusive shortwave bands provided by MODIS sensors offer new opportunities for agricultural drought monitoring, since they are very sensitive to vegetation moisture. In the present work, we selected Songnen Plain in Northeast China as study area aiming at monitoring agricultural drought of dry farmland here. Four types of vegetation water indices and vegetation greenness indices were calculated from the 8-day composite MODIS product (MODO9A1) in vegetation growing season between 2001 and 2010, respectively. Multi-scale standardized precipitation index (SPI) derived from precipitation data of weather stations was used as reference data to estimate drought sensitivity of various vegetation indices, and a pixel-to-weather station paired correlation approach was used to calculate the Pearson correlation coefficient between vegetation index and SPIs. The result indicated that vegetation water indices established by near infrared and shortwave infrared bands outperformed vegetation greenness indices based on visible and near infrared bands. Of these indices, NDII7 performs the best with highest correlation coefficients across all SPIs. The authors' results demonstrated the potential of MODIS shortwave spectral bands in monitoring agricultural drought, and this provides new insights to future research.

Signaling pathways in Parkinson's disease: molecular mechanisms and therapeutic interventions.

Parkinson's disease (PD) is the second most common neurodegenerative disease worldwide, and its treatment remains a big challenge. The pathogenesis of PD may be related to environmental and genetic factors, and exposure to toxins and gene mutations may be the beginning of brain lesions. The identified mechanisms of PD include α-synuclein aggregation, oxidative stress, ferroptosis, mitochondrial dysfunction, neuroinflammation, and gut dysbiosis. The interactions among these molecular mechanisms complicate the pathogenesis of PD and pose great challenges to drug development. At the same time, the diagnosis and detection of PD are also one of obstacles to the treatment of PD due to its long latency and complex mechanism. Most conventional therapeutic interventions for PD possess limited effects and have serious side effects, heightening the need to develop novel treatments for this disease. In this review, we systematically summarized the pathogenesis, especially the molecular mechanisms of PD, the classical research models, clinical diagnostic criteria, and the reported drug therapy strategies, as well as the newly reported drug candidates in clinical trials. We also shed light on the components derived from medicinal plants that are newly identified for their effects in PD treatment, with the expectation to provide the summary and outlook for developing the next generation of drugs and preparations for PD therapy.

Efficacy of high-dose dual therapy for Helicobacter pylori infection eradication in servicemen: a randomized controlled trial / 中华内科杂志

Objective: To assess the efficacy and cost-effectiveness of high-dose dual therapy compared with bismuth-containing quadruple therapy for treating Helicobacter pylori(H.pylori) infection in servicemen patients. Methods: A total of 160 H. pylori-infected, treatment-naive servicemen, including 74 men and 86 women, aged from 20 years to 74 years, with a mean (SD) age of 43 (13) years, tested in the First Center of Chinese PLA General Hospital from March 2022 to May 2022 were enrolled in this open-label, randomized controlled clinical trial. Patients were randomly allocated into 2 groups: the 14-day high-dose dual therapy group and the bismuth-containing quadruple therapy group. Eradication rates, adverse events, patient compliance, and drug costs were compared between the two groups. The t-test was used for continuous variables, and the Chi-square test for categorical variables. Results: No significant difference in H. pylori eradication rates were found between high-dose dual therapy and bismuth-containing quadruple therapy by ITT, mITT and PP analysis[ITT:90.0% (95%CI 81.2%-95.6%) vs. 87.5% (95%CI 78.2%-93.8%), χ2=0.25, P=0.617;mITT:93.5% (95%CI 85.5%-97.9%) vs. 93.3% (95%CI 85.1%-97.8%), χ2<0.01, P=1.000; PP: 93.5% (95%CI 85.5%-97.9%) vs. 94.5% (95%CI 86.6%-98.5%), χ2<0.01, P=1.000 ]. The dual therapy group exhibited significantly less overall side effects compared with the quadruple therapy group [21.8% (17/78) vs. 38.5% (30/78), χ2=5.15,P=0.023]. There were no significant differences in the compliance rates between the two groups [98.7%(77/78) vs. 94.9%(74/78), χ2=0.83,P=0.363]. The cost of medications in the dual therapy was 32.0% lower compared with that in the quadruple therapy (472.10 RMB vs. 693.94 RMB). Conclusions: The dual regimen has a favorable effect on the eradication of H. pylori infection in servicemen patients. Based on the ITT analysis, the eradication rate of the dual regimen is grade B (90%, good). Additionally, it exhibited a lower incidence of adverse events, better compliance and significantly reduced cost. The dual regimen is expected to be a new choice for the first-line treatment of H. pylori infection in servicemen but needs further evaluation.

Research progress on role of Chinese medicinal materials and their topical preparations in wound healing by regulating cytokines and growth factors / 中国中药杂志

Delayed-or non-healing wounds caused by trauma, surgical procedures, acute diseases, or chronic diseases, and proli-ferating scar have a serious impact on patients' quality of life and increase the economic and psychological burden on their families. Therefore, how to accelerate wound healing and obtain satisfactory aesthetic results is of great concern to researchers and is an urgent clinical problem to be solved. In recent years, the mechanisms of Chinese medicinal materials in accelerating wound healing and inhi-biting scar formation by regulating cytokines have been clarified, which provides a scientific basis for revealing the efficacy of Chinese medicinal materials against clinical trauma. This review focuses on the therapeutic effects of active ingredients, extracts, and topical preparations of Chinese medicinal materials through regulating cytokines in the inflammation, proliferation, and remodeling phases of wound healing. It is expected to provide evidence for the application of Chinese medicinal materials in wound therapy.

Implementation of the pre-operative rehabilitation recovery protocol and its effect on the quality of recovery after colorectal surgeries / 中华医学杂志(英文版)

BACKGROUND@#Patients' recovery after surgery is the major concern for all perioperative clinicians. This study aims to minimize the side effects of peri-operative surgical stress and accelerate patients' recovery of gastrointestinal (GI) function and quality of life after colorectal surgeries, an enhanced recovery protocol based on pre-operative rehabilitation was implemented and its effect was explored.@*METHODS@#A prospective randomized controlled clinical trial was conducted, patients were recruited from January 2018 to September 2019 in this study. Patients scheduled for elective colorectal surgeries were randomly allocated to receive either standardized enhanced recovery after surgery (S-ERAS) group or enhanced recovery after surgery based on pre-operative rehabilitation (group PR-ERAS). In the group PR-ERAS, on top of recommended peri-operative strategies for enhanced recovery, formatted rehabilitation exercises pre-operatively were carried out. The primary outcome was the quality of GI recovery measured with I-FEED scoring. Secondary outcomes were quality of life scores and strength of handgrip; the incidence of adverse events till 30 days post-operatively was also analyzed.@*RESULTS@#A total of 240 patients were scrutinized and 213 eligible patients were enrolled, who were randomly allocated to the group S-ERAS (n = 104) and group PR-ERAS (n = 109). The percentage of normal recovery graded by I-FEED scoring was higher in group PR-ERAS (79.0% vs. 64.3%, P  0.050).@*CONCLUSIONS@#Peri-operative rehabilitation exercise might be another benevolent factor for early recovery of GI function and life of quality after colorectal surgery. Newer, more surgery-specific rehabilitation recovery protocol merits further exploration for these patients.@*TRIAL REGISTRATION@#ChiCTR.org.cn, ChiCTR-ONRC-14005096.

Stratified pain management counseling and implementation improving patient satisfaction: a prospective, pilot study / 中华医学杂志(英文版)

BACKGROUND@#Post-operative pain is unpleasant for patients and may worsen surgical recovery. Peri-operative multimodal analgesia has been used for many years; however, its efficacy still needs improvement. In the present study, a thorough peri-operative pain counseling and stratified management program based on risk assessment was implemented, with the goal of improving post-operative analgesia and patient satisfaction.@*METHODS@#This prospective, controlled, pilot study included 361 patients who underwent elective surgery. Of these 361 patients, 187 received peri-operative pain risk assessment and stratified analgesia and counseling (stratified analgesia group), while 174 received conventional multimodal analgesia (conventional group). The two groups were compared regarding the post-operative pain intensity, rescue analgesia administration, post-operative quality of recovery as assessed via the quality of recovery 40 questionnaire, total dosage of peri-operative opioids, analgesic satisfaction, and analgesic costs.@*RESULTS@#Compared with the conventional group, the stratified analgesia group reported decreased pain intensity during motion at 24 h post-operatively and required lower dosages of rescue analgesia (P = 0.03). The total quality of recovery 40 questionnaire score and the scores for physical wellbeing and pain were significantly better in the stratified analgesia group than the conventional group (P = 0.04); the stratified analgesia group also reported better scores for analgesic satisfaction (P = 0.03) and received lower dosages of opioids (P = 0.03). Analgesic costs were lower in the stratified analgesia group than the conventional group; the cost-effective ratio was 109 in the conventional group and 62 in the stratified analgesia group.@*CONCLUSIONS@#The analgesic efficacy was improved by the implementation of stratified analgesia based on surgical pain risk assessment and counseling. This stratified analgesia protocol increased the patients' analgesic satisfaction and improved the quality of recovery without increasing healthcare costs. The present findings may help improve the efficacy of peri-operative multimodal analgesia in clinical practice.@*CLINICAL TRIAL REGISTRY@#NCT02728973; https://clinicaltrials.gov/ct2/show/NCT02728973?term=NCT02728973&draw=2&rank=1.

Effects of Proton Pump Inhibitors on the Gastrointestinal Microbiota in Gastroesophageal Reflux Disease / 基因组蛋白质组与生物信息学报·英文版

Proton pump inhibitors (PPIs) are commonly used to lessen symptoms in patients with gastroesophageal reflux disease (GERD). However, the effects of PPI therapy on the gastrointestinal microbiota in GERD patients remain unclear. We examined the association between the PPI usage and the microbiota present in gastric mucosal and fecal samples from GERD patients and healthy controls (HCs) using 16S rRNA gene sequencing. GERD patients taking PPIs were further divided into short-term and long-term PPI user groups. We showed that PPI administration lowered the relative bacterial diversity of the gastric microbiota in GERD patients. Compared to the non-PPI-user and HC groups, higher abundances of Planococcaceae, Oxalobacteraceae, and Sphingomonadaceae were found in the gastric microbiota from the PPI-user group. In addition, the Methylophilus genus was more highly abundant in the long-term PPI user group than in the short-term PPI-user group. Despite the absence of differences in alpha diversity, there were significant differences in the fecal bacterial composition of between GERD patients taking PPIs and those not taking PPIs. There was a higher abundance of Streptococcaceae, Veillonellaceae, Acidaminococcaceae, Micrococcaceae, and Flavobacteriaceae present in the fecal microbiota from the PPI-user group than those from the non-PPI-user and HC groups. Additionally, a significantly higher abundance of Ruminococcus was found in GERD patients on long-term PPI medication than that on short-term PPI medication. Our study indicates that PPI administration in patients with GERD has a significant effect on the abundance and structure of the gastric mucosal microbiota but only on the composition of the fecal microbiota.

A Multi-centered Cross-sectional Study of Disease Burden of Pain of Inpatients in Southwest China / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Pain is a common burden of disease globally; yet, it is not systematically investigated in China, especially in hospitalized patients. This study was aimed at clarifying the epidemiological characteristics of pain and related factors in hospitalized patients in Southwest China.</p><p><b>METHODS</b>A cross-sectional study was conducted to investigate the prevalence, severity, and influencing factors of pain and modes of postoperative analgesia in hospitalized patients from 17 hospitals in Southwest China. A prevalidated questionnaire was employed to calibrate all of these items within 3 days from March 18, 2015 to March 20, 2015.</p><p><b>RESULTS</b>A total of 2293 patients were surveyed, the incidence of pain was 57.4% in all hospitalized patients at rest, of which 62.1% were with acute pain and 37.9% had persistent to chronic pain. Among surgical patients, 90.8% of them complained of acute postoperative pain at rest and 97.1% in motion. The incidence of acute postoperative moderate-to-severe pain was 28.8% at rest and 45.1% in motion. Surgical patients reported higher incidences of pain, especially acute and persistent pain compared with nonsurgical patients (P < 0.05). Postoperative pain occurred predominately at surgical sites (95.2%) as compared with nonsurgical sites (4.8%). Agedness, lower education level, surgery, and history of smoking were factors associated with increased duration and severity of postoperative pain and nonsurgical pain (P < 0.05).</p><p><b>CONCLUSIONS</b>Pain is a common burden of disease in China, of which surgical pain constituted an important component. Surgical patients complained more severe pain than those who did not undergo surgery. Postoperative analgesia still needs to be improved to control pain after surgery. Patients' perception might influence the efficacy of pain management, which should be implemented with a multidisciplinary approach.</p>

Factors affecting the safety and efficacy of peroral endoscopic myotomy for achalasia / 南方医科大学学报

<p><b>OBJECTIVE</b>To identify the factors that affect the safety and efficacy of peroral endoscopic myotomy (POEM) for treatment of achalasia.</p><p><b>METHODS</b>Data of consecutive patients undergoing POEM for confirmed achalasia between December, 2010 and December, 2015 were collected, including the procedure time, approach of tunnel entry incision, approach of myotomy, complications and follow-up data.</p><p><b>RESULTS</b>Among the total of 439 patients enrolled, the overall complication rate was 28.7% (126/439). Treatment success (Eckardt score≤3) was achieved in 94.5% of 364 patients followed up for a median of 6 months (1-48 months), and the mean score was reduced significantly from 6.7∓1.5 before treatment to 1.2∓1.1 after the treatment (P<0.05). Logistic regression revealed that the year when POEM was performed and the approach of entry incision were two significant factors contributing to complications: with the year 2015 as the reference, the odds ratio (OR) was 9.454 (95% CI: 2.499-35.76) for the years before 2011, 2.177 (95% CI: 0.794-5.974) for 2012, 3.975 (95% CI: 1.904-8.298) for 2013, and 1.079 (95% CI: 0.601-1.940) for 2014; with the longitudinal entry incision as the reference, the OR was 0.369 (95% CI: 0.165-0.824) for inverted T entry incision and 0.456 (95% CI: 0.242-0.859) for transverse entry incision. The approach of myotomy was the significantly associated with symptomatic relapse: with full-thickness myotomy combined with indwelling an anti-reflux belt as the reference, the OR was 0.363 (95% CI: 0.059-2.250) for gradual full-thickness myotomy, 2.137 (95% CI: 0.440-10.378) for circular muscle myotomy, and 4.385 (95% CI: 0.820-23.438) for circular muscle myotomy in combination with balloon shaping; the recurrence rate was 0 with a full-thickness myotomy.</p><p><b>CONCLUSION</b>The complication rates of POEM appears to decrease over time, and an inverted T entry incision is the best choice for controlling the complications. Gradual full-thickness myotomy is an excellent approach for treatment of achalasia in terms of the relapse rate, procedure time and the incidence of reflux esophagitis.</p>

Dissolution difference of ginsenosides from ultrafine granular powder and common powder traditional pieces of Panacis Quinquefolii Radix in vitro / 中国中药杂志

The dissolution of Panacis Quinquefolii Radix ultrafine granular powder and common powder, traditional pieces in water and simulated gastric juice in vitro was compared, and the effect of particles size of Panacis Quinquefolii Radix on the dissolution was studied. HPLC method was used for determination of five ginsenosides including Rg1, Re, Rb1, Rc and Rd from ultrafine granular powder and common powder, traditional pieces of Panacis Quinquefolii Radix at different points in time, furthermore, the dissolution curves of Panacis Quinquefolii Radix ultrafine granular powder and common powder, traditional pieces were obtained. The dissolution characteristics of the three Panacis Quinquefolii Radix forms were also compared in this study. According to the results, the dissolution rates of ginsenosides from ultrafine granular powder exceeded 90% of the total content with 5 min, significantly higher than that of the other two forms in water in vitro. At the same time, the dissolved amount of the ultrafine granular powder was fourteen percent higher than that of the traditional pieces and eight percent higher than that of the common powder. Under the condition of simulated gastric juice in vitro, the dissolution rates of ginsenosides from ultrafine granular powder were little lower than that of the other two, but the maximum dissolved amount of the former was fourteen percent higher than that of the common powder and five percent higher than that of the extracts. Therefore the conclusion is that micronization of Panacis Quinquefolii Radix contributed to dissolution of effective components.

Preliminary study on effect of Rhodiolae Crenulatae Radix et Rhizoma cell wall-broken decoction pieces on intestinal flora of mice / 中国中药杂志

This study aims to analyze and compare the effect of cell wall-broken decoction pieces, conventional decoction pieces and conventional powder of Rhodiolae Crenulatae Radix et Rhizoma on the intestinal flora of normal mice. The conventional bacterial culture and PCR-DGGE (polymerase chain reaction-denaturing gradient gel electrophoresis) were adopted for the mice after the oral administration for 14 days. According to the bacterial culture results, the 1/8 dose cell wall-broken decoction pieces group showed fewer Enterococcus and Escherichia coli bacillus but more Lactobacillus and Bifidobacterium than the conventional decoction pieces group and the traditional powder group (P <0.05). Meanwhile, on the basis of the PCR-DGGE results, the 1/8 dose cell wall-broken decoction pieces group revealed the highest Shannon-Wiener index (H) and species richness (S) among the seven groups, with extremely significant differences compared with the normal group (P <0.01), significant differences compared with the conventional decoction pieces group and the conventional powder group (P <0.05) and a high intra-group similarity. In conclusion, the long-term intake of 1/8 dose Rhodiolae Crenulatae Radix et Rhizoma cell wall-broken decoction pieces showed a certain effect in regulating intestinal tract by promoting the growth of Lactobacillus and Bifidobacterium. Furthermore, the intestinal flora community will become more stable.

Offshore training in navy personnel is associated with uninvestigated dyspepsia / 华中科技大学学报（医学）（英德文版）

To investigate the known and new factors associated with uninvestigated dyspepsia (UD), we surveyed 8600 Chinese navy personnel with offshore training shorter than 1 month or longer than 9 months per year. All respondents were required to complete a questionnaire covering demographics, the Chinese version of the Rome III survey, eating habits, life styles, and medical and family history. The response rate was 94.3% (8106/8600) with 4899 respondents qualified for analysis, including 1046 with offshore training and 3853 with onshore training. The prevalence of UD was higher in the offshore group than in the onshore group (12.6% vs. 6.9%, P<0.001), with a general prevalence of 8.1%. The subjects with offshore training were more likely to suffer from UD and postprandial distress syndrome (OR=1.955, 95% CI 1.568-2.439, P<0.001 and OR=1.789, 95% CI 1.403-2.303, P<0.001, respectively). The multivariate logistic regression analysis showed UD was associated with offshore training (OR=1.580, 95% CI 1.179-2.118, P=0.002), family history (OR=1.765, 95% CI 1.186-2.626, P=0.005) and smoking (OR=1.270, 95% CI 1.084-1.488, P=0.003), but not with alcohol drinking. The association between dysentery history and UD was undetermined/borderline (P=0.056-0.069). In conclusion, we identified offshore training as a new factor associated with UD, and also confirmed 2 known associated factors, family history and smoking.

Offshore training in navy personnel is associated with uninvestigated dyspepsia / 华中科技大学学报（医学）（英德文版）

To investigate the known and new factors associated with uninvestigated dyspepsia (UD), we surveyed 8600 Chinese navy personnel with offshore training shorter than 1 month or longer than 9 months per year. All respondents were required to complete a questionnaire covering demographics, the Chinese version of the Rome III survey, eating habits, life styles, and medical and family history. The response rate was 94.3% (8106/8600) with 4899 respondents qualified for analysis, including 1046 with offshore training and 3853 with onshore training. The prevalence of UD was higher in the offshore group than in the onshore group (12.6% vs. 6.9%, P<0.001), with a general prevalence of 8.1%. The subjects with offshore training were more likely to suffer from UD and postprandial distress syndrome (OR=1.955, 95% CI 1.568-2.439, P<0.001 and OR=1.789, 95% CI 1.403-2.303, P<0.001, respectively). The multivariate logistic regression analysis showed UD was associated with offshore training (OR=1.580, 95% CI 1.179-2.118, P=0.002), family history (OR=1.765, 95% CI 1.186-2.626, P=0.005) and smoking (OR=1.270, 95% CI 1.084-1.488, P=0.003), but not with alcohol drinking. The association between dysentery history and UD was undetermined/borderline (P=0.056-0.069). In conclusion, we identified offshore training as a new factor associated with UD, and also confirmed 2 known associated factors, family history and smoking.

Aquaporin 8 expression is reduced and regulated by microRNAs in patients with ulcerative colitis / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Ulcerative colitis (UC) is associated with differential expression of genes involved in inflammation and tissue remodeling. MicroRNA (miRNA) plays an important role in the pathogenesis of UC by regulating the gene expression at the post-transcriptional level and control crucial physiological processes. This study aimed to identify aquaporin 8 (AQP8) expression and its relationship with miRNA in UC patients.</p><p><b>METHODS</b>Human colon samples, in this study, were obtained from 20 patients with UC and 16 healthy subjects undergoing diagnostic colonoscopy at the Chinese People's Liberation Army General Hospital between December 2009 and June 2010. We screened different genes from UC tissues and healthy subjects using genome-wide microarray, quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and Western blotting. Regulation of gene expression by miRNAs was assessed by luciferase reporter construct assays and transfection of specific miRNA mimics and inhibitor.</p><p><b>RESULTS</b>We identified that 1596 genes were increased and 1301 genes were decreased in UC patients compared to healthy subjects. Among them, we focused on the analysis of AQP8 which was decreased three folds in UC tissues (P < 0.01). The expression of AQP8 mRNA and protein were decreased in UC tissue and tumor necrosis factor (TNF)-α treated HT29 cells compared with controls (P < 0.05). We searched candidate target miRNAs of AQP8 through bioformatics and the luciferase report assay analysis indicated that miR-424, miR-195, miR-330, miR-612, and miR-16 which has complementary site in the 3-untranslated region (3'UTR) of AQP8 could decrease the relative luciferase activities by 10% - 45%.</p><p><b>CONCLUSION</b>AQP8 and its relationship with miRNAs may be involved in the pathogenesis of UC.</p>

Research on functional dyspepsia prevalence and related factors of naval / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To analyze functional dyspepsia prevalence and associated factors of naval forces.</p><p><b>METHOD</b>By stratified random cluster sampling method, conducted a questionnaire survey and diagnosis of functional dyspepsia to 11 520 military sea forces, and analyzed risk in clinical factors. Large sample size of 3084 cases in the diagnosis of functional dyspepsia, analyzed correlation of the selected 100 patients by single sample random sampling method.</p><p><b>RESULT</b>Naval forces, functional dyspepsia prevalence was 29.27% (3084/10537), and logistic regression analysis showed that job factors of military service, military rank, the nature of the work, the training intensity, training environmental P = 0.028, 0.023, 0.000, 0.000, 0.014, OR = 10.308, 6.288, 22.504, 26.720, 9.825; life factors of daily water intake, eating fruits and frequency of sleep time, spicy eating habits, drinking history factors P = 0.000, 0.012, 0.025, 0.017, 0.027, OR = 28.467, 20.335, 11.358, 10.249, 9.578; psychological factors, depression, anxiety factor P = 0.024, 0.019, OR = 16.878, 18.025;generally age, gender, ethnicity, BMI index, gastrointestinal history, history of drug, educational background, geographic factors P = 0.042, 0.033, 0.417, 0.000, 0.000, 0.012, 0.392, 0.440, OR = 3.406, 7.511, 2.643, 42.073, 88.457, 21.680, 1.752, 5.561.When value of P < 0.05, clinical risk factors were screened. Clinical symptom scores and work, life factor score and SAS, SDS score of randomly selected patient samples was positively correlated, r = 0.816, 0.763, 0.795, 0.923, P = 0.000, indicating statistically significant.</p><p><b>CONCLUSION</b>Naval forces functional dyspepsia prevalence was higher than the general population, which risk factors included work, life, psychological, physical fitness factors, closely related with military service and military personnel, military rank, the nature of the work, the training intensity and environment, eating habits, daily sleep time, drinking history, depression, anxiety level, age, gender, BMI index, history of gastrointestinal disease, use of drugs, high priority should be given to the risk factors listed above, the development of rational targeted programs to strengthen the cause of prevention measures.</p>

Magnifying endoscopy with narrow-band imaging may improve diagnostic accuracy of differentiated gastric intraepithelial neoplasia: a feasibility study / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Magnifying narrow-band imaging has enabled observation of the mucosal and vascular patterns of gastrointestinal lesions. This study investigated the potential value of magnifying endoscopy with narrow-band imaging for the classification of gastric intraepithelial neoplasia.</p><p><b>METHODS</b>Seventy-six patients with gastric intraepithelial neoplasia (82 lesions) at People's Liberation Army General Hospital from December 2009 to November 2010 were analyzed. All patients underwent magnifying endoscopy with narrow-band imaging, and their lesions were differentiated into probable low-grade intraepithelial neoplasia or possible high-grade intraepithelial neoplasia on the basis of the imaging features. Pathologic proof was subsequently obtained by endoscopic submucosal dissection in every case. The validity of magnifying endoscopy with narrow-band imaging was calculated, considering histopathology to be the gold standard.</p><p><b>RESULTS</b>Magnifying endoscopy with narrow-band imaging showed 22 low-grade intraepithelial neoplastic lesions and 60 high-grade intraepithelial neoplastic lesions. Of the 22 low-grade intraepithelial neoplastic lesions, 16 showed the same results on both imaging and pathology. Of the 60 high-grade intraepithelial neoplastic lesions, 53 showed the same results on both imaging and pathology. Thus, the sensitivity of magnifying endoscopy with narrow-band imaging for high-grade intraepithelial neoplasia was 89.83%, which was higher than that for low-grade intraepithelial neoplasia (69.57%). However, the specificity for high-grade intraepithelial neoplasia (69.57%) was lower than that for low-grade intraepithelial neoplasia (89.83%). The overall accuracy of magnifying endoscopy with narrow-band imaging was 84.15%.</p><p><b>CONCLUSIONS</b>Magnifying endoscopy with narrow-band imaging can distinguish between gastric low- and high-grade intraepithelial neoplasia. It may be a convenient and effective method for the classification of gastric intraepithelial neoplasia.</p>

Exploration on neoadjuvant chemoradiation in the treatment for locally advanced low rectal cancer / 中华外科杂志

<p><b>OBJECTIVE</b>To explore the possibility of further improvement of the efficacy of neoadjuvant chemoradiotherapy in locally advanced lower rectal cancer and the management of patients with clinical complete regression.</p><p><b>METHODS</b>From May 2001 to August 2007, 192 cases with locally advanced lower rectal cancer (T3/T4 or N(+)) received preoperative radiotherapy 40 - 46 Gy/20 - 23 fractions and concomitant oral capecitabine 625 mg/m(2) bid for 10 weeks prior to surgery. Curative resection with total mesorectal excision (TME) was carried out 6 weeks after the end of radiation.</p><p><b>RESULTS</b>As a result, 117 cases (60.9%) experienced adverse events but only 2 suffered from G3 side effects. Seventeen cases (8.9%) had a clinical complete tumor regression without surgery; 175 patients underwent curative resection, of them 134 cases with low anterior resection (LAR), 32 cases with ultra-low anterior resection with Park's coloanal anastomosis (6 cases with diverting temporary colostomy) and 9 cases with abdominal pelvic resection (APR). Sphincter preservation was achieved in 94.9%. Twenty-four patients (12.5%) got pathological complete response (CR), 17 patients with clinical CR and the overall CR rate was 21.4%. According to the pathological staging post operation: T0N0 41 cases, T2N0 43 cases, T3N0 77 cases, T4N0 5 cases, T2N1 11 cases, T3N1 13 cases, T4N1 2 cases; Graded under Dworak's tumor regression: TRG0 8 patients, TRG1 32 patients, TRG2 28 patients, TRG3 83 patients and TRG4 24 patients, with an overall pathological tumor downstaging in 77.14%. No operative death occurred, 5 patients suffered from rectovaginal fistulas and 4 anastomotic leakages with an overall anastomotic leakage rate of 5.1% (9/175) and all the patients recovered uneventfully after properly managed. All patients were followed up for a median time of 42 months (range, 12 - 87 months). During the time, 11 patients developed lung metastases, 6 liver metastases and 7 had local recurrences. The 3 years disease-free survival (DFS) was 86.6% and overall survival (OS) was 92.6%.</p><p><b>CONCLUSIONS</b>Neoadjuvant chemoradiotherapy has high efficacy in locally advanced lower rectal cancer, resulting in tumor down-staging, improved resectability and sphincter preservation, and reduced local recurrences. Meanwhile the cases with clinical complete response can be followed up closely and safely without surgery.</p>

Influence of intrapulmonary regulatory peptides on the expressions of HLA-DR, CD80 and CD86 in human bronchial epithelial cells / 生理学报

Antigen presenting is the initial step of the immune responses. In order to verify that human bronchial epithelial cells (HBECs) can express antigen presentation molecules, which can be modulated by intrapulmonary regulatory peptides, the present study was designed to examine the expressions of human leukocyte antigen DR (HLA-DR), CD80 and CD86 in resting or ozone-stressed HBECs by using immunocytochemistry and flow cytometry analysis. The results showed that HBECs expressed HLA-DR, CD80 and the expressions of HLA-DR and CD80 molecules were down-regulated under ozone stress. While VIP, P3513 and CGRP upregulated the expression of HLA-DR in resting or ozone-stressed HBECs, they had different effects on CD80 expression. VIP did not influence the expression of CD80 under resting state, but increased the expression of CD80 under ozone stress. CGRP decreased CD80 expression in resting HBECs, but increased CD80 expression in ozone-stressed HBECs. P3513 increased CD80 expression in resting HBECs, but decreased CD80 expression in ozone-stressed HBECs. The expression of CD86 was absent in resting or ozone-stressed HBECs. The results obtained demonstrate that HBECs have the capability to act as antigen presenting cells and the expression of HLA-DR and costimulatory molecules can be modulated by intrapulmonary regulatory peptides.

Experimental study of transplanting human mesenchymal stem cells via portal vein to treat acute liver injury of mice induced with acetaminophen / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To evaluate the effects of human mesenchymal stem cells (hMSCs) transplantation via portal vein to treat acute liver injury in mice induced with acetaminophen.</p><p><b>METHODS</b>A model of acute liver injury was established by acetaminophen gavage with a dose of 500 mg/kg. Twenty severe combined immune deficient mice (SCID mice) were randomly divided into 2 groups; one with hMSCs transplantation via their portal veins, the other group served as controls and only saline was infused into their veins. Liver function tests, fluorescein staining and reticular fiber staining of liver histological preparations and fluorescence- and light-microscopy were applied to observe the biochemical and pathological changes in the mice before and after the transplantation of hMSCs.</p><p><b>RESULTS</b>Liver function of the hMSCs group was significantly better than that of the controls (P less than 0.05). Fluorescence microscopy revealed that the hMSCs appeared in the areas of the periportal veins at first and then extended to the central vein areas; the reticular fiber staining indicated that hMSCs could repair the architecture of the hepatic acini. No prominent fibrosis and pseudolobules were found.</p><p><b>CONCLUSIONS</b>hMSCs transplantation via portal vein to SCID mice with acute liver injury induced by acetaminophen can improve their liver function effectively; hMSCs growth in their livers and acinus reconstruction can be affected. We think it is a good method to treat acute liver injury.</p>