Research progress of polymer self-healing mechanism and its application in biomedicine / 药学学报

Polymer self-healing is mainly based on the molecular structure and interaction of polymers, and some need external stimulation, such as light, heat, pH, etc. In recent years, many studies have found that the self-healing properties of polymers can prolong the life of materials, while maintaining the mechanical properties of polymers after healing. According to the different action modes of polymer materials, it can be divided into autonomous self-healing and non-autonomous self-healing. Among them, autonomous self-healing mainly works through reversible covalent bonds (Schiff base bond, Diels-Alder reaction, hydrazide bond), reversible non-covalent bonds (hydrogen bond, metal-ligand coordination bond, electrostatic interaction, π-π stacking interaction, hydrophobic interaction) and a combination of the two interactions. Drug carriers with unique self-healing properties play an important role in the encapsulation and stable release of biomacromolecules. In this review, the self-healing mechanism of polymers and their applications in the field of biomedicine were briefly summarized and discussed.

Establishment and validation of a nomogram for predicting prognosis of gastric neuroendocrine neoplasms based on data from 490 cases in a single center / 南方医科大学学报

OBJECTIVE@#To develop and validate a nomogram for predicting outcomes of patients with gastric neuroendocrine neoplasms (G-NENs).@*METHODS@#We retrospectively collected the clinical data from 490 patients with the diagnosis of G-NEN at our medical center from 2000 to 2021. Log-rank test was used to analyze the overall survival (OS) of the patients. The independent risk factors affecting the prognosis of G-NEN were identified by Cox regression analysis to construct the prognostic nomogram, whose performance was evaluated using the C-index, receiver-operating characteristic (ROC) curve, area under the ROC curve (AUC), calibration curve, DCA, and AUDC.@*RESULTS@#Among the 490 G-NEN patients (mean age of 58.6±10.92 years, including 346 male and 144 female patients), 130 (26.5%) had NET G1, 54 (11.0%) had NET G2, 206 (42.0%) had NEC, and 100 (20.5%) had MiNEN. None of the patients had NET G3. The numbers of patients in stage Ⅰ-Ⅳ were 222 (45.3%), 75 (15.3%), 130 (26.5%), and 63 (12.9%), respectively. Univariate and multivariate analyses identified age, pathological grade, tumor location, depth of invasion, lymph node metastasis, distant metastasis, and F-NLR as independent risk factors affecting the survival of the patients (P < 0.05). The C-index of the prognostic nomogram was 0.829 (95% CI: 0.800-0.858), and its AUC for predicting 1-, 3- and 5-year OS were 0.883, 0.895 and 0.944, respectively. The calibration curve confirmed a good consistency between the model prediction results and the actual observations. For predicting 1-year, 3-year and 5-year OS, the TNM staging system and the nomogram had AUC of 0.033 vs 0.0218, 0.191 vs 0.148, and 0.248 vs 0.197, respectively, suggesting higher net benefit and better clinical utility of the nomogram.@*CONCLUSION@#The prognostic nomogram established in this study has good predictive performance and clinical value to facilitate prognostic evaluation of individual patients with G-NEN.

Analysis of clinicopathological characteristics, therapeutic strategy and prognosis of 501 patients with gastric neuroendocrine neoplasms attending a single center / 中华胃肠外科杂志

Objective: To explore the clinicopathological features, treatment strategy and to analysis of prognosis-related risk factors of gastric neuroendocrine neoplasms(G-NEN). Methods: In this study, a retrospective observational study method was used to collect the clinicopathological data of patients diagnosed with G-NEN by pathological examination in the First Medical Center of PLA General Hospital from January 2000 to December 2021. The basic information of the patients, tumor pathological characteristics, and treatment methods were entered, and the treatment information and survival data after discharge were followed up and recorded. The Kaplan-Meier method was used to construct survival curves, and the log-rank test to analyze the differences in survival between groups. Cox Regression model analysis of risk factors affecting the prognosis of G-NEN patients. Results: Among the 501 cases confirmed as G-NEN, 355 were male and 146 were female, and their median age was 59 years. The cohort comprised 130 patients (25.9%) of neuroendocrine tumor (NET) G1, 54 (10.8%) of NET G2, 225 (42.9%) of neuroendocrine carcinoma (NEC), and 102 cases (20.4%) of mixed neuroendocrine-non-neuroendocrine(MiNEN). Patients NET G1 and NET G2 were mainly treated by endoscopic submucosal dissection (ESD) and endoscopic mucosal resection (EMR). The main treatment for patients with NEC/MiNEN was the same as that for gastric malignancies, namely radical gastrectomy+lymph node dissection supplemented with postoperative chemotherapy. There were significant differences in sex, age, maximum tumor diameter, tumor morphology, tumor numbers, tumor location, depth of invasion, lymph node metastasis, distant metastasis, TNM staging and expression of immunohistological markers Syn and CgA among NET, NEC, and MiNEN patients (all P<0.05). Further for NET subgroup analysis, there were significant differences between NET G1 and NET G2 in the maximum tumor diameter, tumor shape and depth of invasion(all P<0.05). 490 patients (490/501, 97.8%) were followed up with a median of 31.2 months. 163 patients had a death during follow-up (NET G1 2, NET G2 1, NEC 114, MiNEN 46). For NET G1, NET G2, NEC and MiNEN patients,the 1-year overall survival rates were 100%, 100%, 80.1% and 86.2%, respectively; the 3-year survival rates were 98.9%, 100%, 43.5% and 55.1%, respectively. The differences were statistically significant (P<0.001). Univariate analysis showed that gender, age, smoking history, alcohol history, tumor pathological grade, tumor morphology, tumor location, tumor size, lymph node metastasis, distant metastasis, and TNM stage were associated with the prognosis of G-NEN patients (all P<0.05). Multivariate analysis showed that age ≥60 years, pathological grade of NEC and MiNEN, distant metastasis, and TNM stage III-IV were independent factors influencing the survival of G-NEN patients (all P<0.05). 63 cases were stage IV at initial diagnosis. 32 of these were treated with surgery and 31 with palliative chemotherapy. Stage IV subgroup analysis showed that the 1-year survival rates were 68.1% and 46.2% in the surgical treatment and palliative chemotherapy groups, respectively, and the 3-year survival rates were 20.9% and 10.3%, respectively; the differences were statistically significant (P=0.016). Conclusions: G-NEN is a heterogeneous group of tumors. Different pathological grades of G-NEN have different clinicopathological features and prognosis. Factors such as age ≥ 60 years old, pathological grade of NEC/MiNEN, distant metastasis, stage III, IV mostly indicate poor prognosis of patients. Therefore, we should improve the ability of early diagnosis and treatment, and pay more attention to patients with advanced age and NEC/MiNEN. Although this study concluded that surgery improves the prognosis of advanced patients more than palliative chemotherapy, the value of surgical treatment for patients with stage IV G-NEN remains controversial.

Research progress in mechanism of Chinese herbal compounds and monomers in delaying lumbar intervertebral disc degeneration / 中国中药杂志

Traditional Chinese medicine has unique advantages in the treatment of degenerative bone and joint diseases, and its widely used in clinical practice. In recent years, many scholars have conducted a large number of basic studies on the delay of intervertebral disc degeneration by herbal compound and monomeric components from different perspectives. In order to further elucidate its mechanism of action, this paper summarizes the in vivo and in vitro experimental studies conducted at the level of both herbal compound and single components, respectively, in order to provide references for the basic research on the treatment of lumbar intervertebral disc degeneration by Chinese medicine. A summary shows that commonly used herbal compound prescriptions include both classical prescriptions such as Duhuo Jisheng Decoction, as well as clinical experience prescriptions such as Yiqi Huoxue Recipe. Angelicae Sinensis Radix, Chuanxiong Rhizoma, Rehmanniae Radix Praeparata, Achyranthis Bidentatae Radix, and Eucommiae Cortex were used most frequently. Tonic for deficiency and blood stasis activators were used most frequently. The most utilized monomeric components include icariin, ginsenoside Re, salvianolic acid B and aucubin. The main molecular mechanisms by which herbal compound and monomeric components delay of lumbar intervertebral disc degeneration include improving the intervertebral disc microenvironment, promoting the synthesis of aggregated proteoglycans and type Ⅱ collagen in the intervertebral disc, reducing the degradation of the extracellular matrix, and inhibiting apoptosis in the nucleus pulposus cells, etc. The main signaling pathways involved include Wnt/β-catenin signaling pathway, MAPK-related signaling pathway, mTOR signaling pathway, Fas/FasL signaling pathway, PI3 K/Akt signaling pathway, NF-κB signaling pathway, JAK/STAT signaling pathway, and hedgehog signaling pathway, etc.

Effect of continuous loading pressure on apoptosis and Wnt/beta-catenin signaling pathway in nucleus pulposus cells / 中国组织工程研究

BACKGROUND: Previous studies have found that continuous loading pressure can induce intervertebral disc degeneration by reducing the number of nucleus pulposus cells and reducing the expression of extracellular matrix in the nucleus pulposus. However, its mechanism of action is unclear. OBJECTIVE: To study the effect of continuous loading pressure on apoptosis and Wnt/β-catenin signaling pathway in nucleus pulposus cells. METHODS: The in vitro models of rabbit spinal motion segment under loading pressure were established and divided into control group (no treatment), pressure group (3 kg continuous loading pressure) and observation group (3 kg continuous loading pressure + 20 μmol/L SB216763). After 3 days of intervention, the pathological changes of nucleus pulposus cells were detected by hematoxylin-eosin staining, and the expression of caspase-3 and GSK-3β protein in nucleus pulposus tissue was detected by western blot assay.

Abdominal drainage versus no drainage after laparoscopy-assisted D2 gastrectomy for gastric cancer / 中国实用外科杂志

OBJECTIVE: To clarify the value of unconventional prophylactic drain placement in laparoscopy assisted D2 gastrectomy for gastric cancer.METHODS: The clinical data of 193 patients with gastric cancer who underwent laparoscopy-assisted D2 Gastrectomy in Department of General Surgery,Chinese PLA General Hospital between February 2017 and February 2018 were analyzed retrospectively.The patients were divided into two groups according to whether the abdominal drain was placed.The drain group comprised 150 patients with routine prophylactic intraabdominal drain placement and the no drain group comprised 43 patients without intra-abdominal drain placement after laparoscopy-assisted D2 gastrectomy.The general information,post-operative recovery and the incidence of postoperative complications were compared in the two groups.RESULTS: There was no significant difference in the general information and postoperative complications in the two groups.The no drain group had shorter hospital stay[(7.17±0.14)d vs.(10.88±0.88) d,(P<0.05)],and shorter exhaust time[(3.39±0.21)d vs.(4.30±0.16)d,P<0.01],less pain [VAS(3.23±0.61) vs.(5.39±0.42),(P<0.05)] and less times of wound dressing change after operation [(3.53±0.52)vs.(7.81±1.05),(P<0.05)] compared with the drain group.CONCLUSION: The unconventional prophylactic drain placement in laparoscopy assisted D2 gastrectomy is safe and feasible.Unnecessary drain placement should be avoided.

Study on residents' satisfaction of basic public health services of urban and rural primary health care institutions / 中国卫生政策研究

Objective:To analyze the satisfaction degree and influencing factors of basic public health services in urban and rural areas in Hubei province,and to provide the evidence for further improvement of the quality of basic public health services. Methods:A total of 12 primary health institutions (6 urban community health service centers and 6 rural township hospitals) were selected from Wuhan,Huanggang,Jingzhou of Hubei Province. A questionnaire survey was conducted on the satisfaction,accessibility,comfort,safety and effectiveness of basic public health services among 719 residents. Results:The overall urban and rural residents'satisfaction score of basic public health service was 71.62 points,and the total satisfaction rate was 73.44%. The urban residents overall satisfaction score was 74.67 points,and the overall satisfaction rate was 75. 34%. The rural residents overall satisfaction score was 67.64 points,and the overall satisfaction rate was 71.52%. Among the specific indicators,the most satisfactory items were the convenience of visits (83.03%),privacy protection (80.25%),and indicators least satisfactory were medical technology(61.61%)and equipment facilities(64.53%). Logistics regression analy-sis showed that accessibility,comfort and safety of basic public health services had a greater impact on community residents' satisfaction;and gender and annual medical expenditure had a certain impact on residents'satisfaction. Conclusions:The over-all satisfaction of basic public health services in urban and rural residents of Hubei province is at a general level and still to be promoted. Urban residents'satisfaction is higher than that of the rural area. The basic public health services should further strengthen the quality improvement to further promote the equalization of basic public health services in rural as in urban areas.

Construction of fresh cervical vertebral artery determination model: influence of variant positions on vertebral artery flow / 中国组织工程研究

BACKGROUND: As a reliable biomechanical model, human fresh isolated cervical specimens provide the basis for studying the pathogenesis of cervical vertigo from the perspective of blood flow of vertebral artery.There is a lack of an in vitro cervical model that can simulate the physiological state of the cervical vertebrae and achieve complex posture, as well as can measure the blood flow of vertebral artery. OBJECTIVE:To study the influence of variant position of human fresh isolated cervical vertebrae on the blood flow of vertebral artery in vitro through constructing the fresh specimen of cervical vertebral artery determination model. METHODS: Six human fresh isolated cervical specimens were selected for constructing the vertebral artery determination model. The pressure of human vertebra artery was simulated by pressure pump. The change of normal saline height was measured by digital motion capture system dynamically under different positions. RESULTS AND CONCLUSION: (1) Eight vertebral arteries in the six models were in good condition. (2) The vertebral artery flow under neutral position was significantly richer than that under contralateral rotation-anteflexion and ipsilateral/contralateral rotation-postexion (P <0.05). (3) The vertebral artery flow under contralateral rotation-anteflexion and rotation-postexion was significantly poorer than that under natural position, ipsilateral rotation and ipsilateral rotation-anteflexion (P < 0.05). (4) In summary, the cervical vertebral artery determination model is constructed successfully that can simulate the influence of the position on vertebral artery flow. Additionally, different positions of rotation make a different effect on vertebral artery flow.

Animal models of intervertebral disc degeneration: economy, feasibility, reliability and controllability / 中国组织工程研究

BACKGROUND: Animal models are critical to study the mechanism, prevention and treatment of intervertebral disc degeneration (IDD). Therefore, constructing an ideal animal model of IDD is the key to further study IDD. OBJECTIVE: To review the selection and construction methods of the IDD model, so as to select and construct an ideal animal model of IDD. METHODS: A retrieval of CNKI, WanFang, VIP, SinoMed and PubMed databases was performed for the articles published before December 2016. The keywords were "intervertebral disc degeneration, animal model" in English and Chinese, respectively. All the articles were selected from the authoritative magazines, and finally 56 eligible articles were included. RESULTS AND CONCLUSION: There are many kinds of animals used for constructing the IDD model, including small and large animals. The former has a small volume of intervertebral disc that is beneficial for nutrient and metabolite transport,so it can be used for long-term in vitro culture.The latter has a large volume of intervertebral disc,which is appropriate for biomechanical study.The animal models of IDD include in vivo and in vitro models:the in vivo models include the changed biomechanics,destroyed physical structure,spontaneous and systemic disease models;the in vitro models include in vitro cellular and organ models.However,there is still a lack of an ideal animal model that can fully simulate human IDD. Noticeably, similarity, comparability, economy, feasibility, reliability and controllability should be considered.

Clinical efficacy and mechanism of traditional Chinese medicine Huoxue-Qingjie decoction for acute pancreatitis / 国际中医中药杂志

Objective To investigate the clinical efficacy and mechanism of Huoxue-Qingjie decoction for acute pancreatitis (AP). Methods According to the random table method, 89 patients with AP from April 2015 to March 2017 were divided into control group (n=44) and observation group (n=45). Two groups of patients were treated with conventional treatment, while the observation group was treated with Huoxue-Qingjie decoction on the basis of routine treatment for 7 days. The clinical total effective rate and improvement of clinical symptoms of two groups of patients were counted, at the same time the serum inflammation and oxidative stress indicators of patients were detected respectively before and after treatment. In addition, the incidence of adverse reactions of two groups of patients was analyzed.. Results The total clinical efficiency of the patients in the observation group was 86.7% (39/45), while the control group was 68.2% (30/44). The difference of two groups was statistically significant (χ2=4.363, P=0.037). The imaging returning to normal time (6.3 ± 1.2 d vs. 9.1 ± 1.1 d, t=-12.161), anal exhausted time (35.7 ± 6.8 h vs. 45.6 ± 7.2 h, t=-6.659), abdominal distension relief time (3.0 ± 0.8 d vs. 3.7 ± 0.9 d, t=-4.154) and bowel sounds recovery time (32.5 ± 5.5 h vs. 39.9 ± 6.1 h, t=-5.998) of the observation group were significantly lower than those of the control group (P<0.01). After treatment, the levels of TNF-α (101.21 ± 17.65 ng/L vs. 132.07 ± 20.32 ng/L, t=-7.654), IL-1β (20.33 ± 6.21 pg/ml vs. 29.03 ± 7.03 pg/ml, t=-6.191), IL-6 (30.07 ± 7.32 ng/L vs. 51.71 ± 7.05 ng/L, t=-14.200), IL-8 (80.23 ± 15.22 ng/L vs. 100.56 ± 16.37 ng/L, t=-6.069), HMGB1 (1.35 ± 0.43 μg/L vs. 2.63 ± 0.57 μg/L, t=-11.977) and MDA (3.02 ± 0.64 nmol/L vs. 4.02 ± 0.83 nmol/L, t=-6.374) of the treatment group were significantly lower than those of the control group (P<0.01), while the levels of SOD (119.63 ± 15.69 U/ml vs. 98.54 ± 10.73 U/ml, t=7.836) and CAT (238.87 ± 42.67 U/ml vs. 196.36 ± 39.65 U/ml, t=4.866) were significantly higher than those of control group (P<0.01). No serious adverse reactions occurred during the treatment of the two groups. Conclusions The clinical effect of Huoxue-Qingjie decoction on AP is significant, and the clinical symptoms can be improved by anti-inflammatory and anti-oxidative effect. The safety is high, and it is worth promoting the application in clinic.

Performance verification and evaluation of 4 domestic chemiluminescence systems on 8 tumor mark-ers / 中华核医学与分子影像杂志

Objective To validate the performance of 4 domestic chemiluminescence immunoassay (CLIA) systems on 8 tumor markers quantitative assay kits. Methods Four domestic CLIA systems were randomly marked as A, B, C, D and 8 tumor markers, including carbohydrate antigen (CA)125, CA15-3, CA19-9, ferritin (Fer), alpha-fetoprotein (AFP), carcinoembryonic antigen (CEA), prostate-specific an-tigen (PSA) and free PSA (fPSA) were determined. According to the standard of Clinical and Laboratory Standards Institute (CLSI), the precision, methodological comparison and analytical measure range of 4 systems were validated. Clinical serum samples were obtained from patients in Suzhou Hospital. According to the CLSI EP9-A3 protocol, imported equipment was used as the reference system. The biases of medical de-cision points were assumed, and Pearson correlation analysis and Spearman correlation analysis were used to analyze the data. Results The precision verification of CA125 and PSA on A, CA125 and AFP on B, CA125, CEA, AFP and PSA on C, and all 8 tumor markers on D could meet the laboratory quality control requirements. The correlations of the test results between A-D and the imported equipment were significant (all P<0.05) with the correlation coefficients 0.79-0.99, 0.47-0.99, 0.90-0.98 and 0.78-1.00, respec-tively, and the number of acceptable tests at the level of medical decision was 5, 2, 5, 4. All tests were certified to meet the analytical measure range validation. Conclusions The detection performance of 4 do-mestic CLIA systems for all 8 tumor markers are different. The performance of domestic CLIA systems should be tested when choosing one that can meet laboratory quality control requirements.

Factors Affecting Patient Satisfaction with Community Health Service under the Gatekeeper System: A Cross-sectional Study in Nanjing, China / 生物医学与环境科学（英文）

The gatekeeper policy has been implemented for approximately ten years on a pilot population in China. It is necessary to assess the satisfaction of patients utilizing community health service (CHS) under the gatekeeper system. Our study showed that the cognition of gatekeeper policy was associated with four dimensions including doctor-patient relationships, information and support, organization of care, and accessibility (P < 0.001). One or more factors such as gender and self-perceived health scores also affected their satisfaction. General practitioners must be prepared to focus on these aspects of information and support, organization of care, and accessibility as indicators of potential opportunities for improvement. Additionally, policymakers can improve patients' satisfaction with CHS by strengthening their awareness of the gatekeeper policy.

X-ray characteristics of posterolateral rotatory instability of the elbow caused by ligament injury / 中国骨伤

<p><b>OBJECTIVE</b>To study the role of lateral collateral ligament complex on the posterolateral rotatory instability and the relationship between the radiocapitellar ratio (RCR) and the injury of lateral collateral ligament complex on X-ray images.</p><p><b>METHODS</b>Twenty elbow joints from fresh-frozen adult cadavers were used to make osteo-ligamentous elbow specimens. The specimens were fixed with a self-made device to maintain posterolateral rotatory instability of the elbow joint. All the specimens were divided into two groups: group A and group B. Surgical procedures were carried out as follows in the lateral structures of group A: A1, intact specimen; A2, transection of radial ulnar collateral ligament firstly; A3, transection of annular ligament secondly; A4, final transection of the radial collateral ligament. The procedures in group B were carried out as follows: B1, intact specimen; B2, transection of the radial collateral ligament firstly; B3, transection of the annular ligament secondly; B4, final transection of the radial ulnar collateral ligament. Lateral X-ray films of elbow joint were taken, and the radiocapitellar ratio (RCR) was measured by using PACS. All analysis was performed with SPSS 17.0 software.</p><p><b>RESULTS</b>Group A: the increases in RCR had statistical differences among A1, A2, A3, and A4 groups. Group B: the increases in RCR had no statistical differences among B1, B2 and B3 groups; but the increase in RCR in group B4 was more than that in B1, B2 and B3 groups.</p><p><b>CONCLUSION</b>The radial ulnar collateral ligament is a key structure to maintain posterolateral rotatory stability;the radial collateral ligament and the annular ligament are the secondary important structures. There are 4 grades of the posterolateral rotatory instability of the elbow, according to the X-ray imaging classification.</p>

Follow-up observation of photoselective vaporization of prostate for treatment of benign prostatic hyperplasia within five years / 中华外科杂志

<p><b>OBJECTIVE</b>To evaluate the efficacy and safty of photoselective vaporization of prostate (PVP) in the treatment of benign prostatic hyperplasia with obstruction within 5 years.</p><p><b>METHODS</b>From December 2004 to December 2009, there were 782 cases have been except for neurogenic bladder dysfunction and prostate cancer, who received PVP surgical treatment of BPH. The surgical conditions and postoperative follow-up data were recorded and the follow-up cut-off time for surgery after 5 years.</p><p><b>RESULTS</b>A total of 782 patients with BPH who underwent PVP were included in this retrospective study. The operation in 740 cases was successfully completed at one time. But in other 42 cases, the twice operation was performed. The mean operation time was (85 ± 38) minutes, and the mean energy delivery was (355 ± 124) kJ. The mean catheterization and postoperative hospitalization time was (2.3 ± 1.7) days and (5.2 ± 2.6) days, respectively. No severe intraoperative complications were observed. The mean follow-up was (44.1 ± 19.3) months. The shortest follow-up was 6 months. The longest follow-up was 5 years. Complete follow-up data were available for 398 of the 782 patients. Of the 398 patients followed up for 5 years, the mean international prostate symptom score after 5 years was 12.8 ± 6.9, quality of life score was 2.2 ± 1.6, maximal flow rate was (14.5 ± 2.4) ml/s, and residual urine volume was 58 ml (M50). The retreatment rate because of BPH was 2.3% (9/398). Urethral stricture and bladder neck contracture were observed in 1.5% and 0.5% of the patients, respectively.</p><p><b>CONCLUSIONS</b>PVP has demonstrated remarkably consistent results for objective and subjective voiding parameters. Its late complication is rare and retreatment rate is low.</p>

Evaluation of effects of combination intervention model to men who have sex with men / 中华预防医学杂志

<p><b>OBJECTIVE</b>This study aimed to explore and evaluate the effects of combination intervention model conducted by Center for Disease Control and Prevention and activity place to men who have sex with men (MSM).</p><p><b>METHODS</b>To implement one-year combination intervention in 4 MSM venues during May, 2009 and April, 2010. Meanwhile, 3 similar MSM venues were chosen as control. MSM places introduced CDC to consumption crowds. Experts and volunteers sent by CDC undertook health education programme on site and condom, lubricant, pamphlet, consultation, test were provided at the same time. The intervention measures applied to control only included providing pamphlet, condom, lubricant by volunteers. Investigations were conducted among subjects of combination intervention group and control group before (111, 120 subjects) and after (105, 98 subjects) the intervention with questions related to knowledge and behavior of AIDS prevention.</p><p><b>RESULTS</b>After one-year intervention, among MSM with combination intervention, the awareness rate of knowledge level about acquired immune deficiency syndrome (AIDS) increased from 73.0% (81/111) to 91.7% (110/120), proportion of condom-use with male at last anal intercourse increased from 73.0% (81/111) to 85.0% (102/120), ratio of never-use condom with male decreased from 10.8% (11/102) to 1.7% (2/112), percentage of acquiring AIDS-related service and intervention improved significantly, acquiring condom (lubricant) increased from 70.3% (78/111) to 85.0% (102/120), acquiring peer education increased from 10.8% (12/111) to 24.2% (29/120), the proportion of acquiring counseling and testing of HIV increased from 69.4% (77/111) to 90.8% (109/120) (all P values < 0.05). The above index show no statistic difference before and after the intervention (all P values > 0.05) in control MSM venues.</p><p><b>CONCLUSION</b>Combination intervention model was an effective intervention model contributing to an increase in knowledge of AIDS prevention and decreasing high risk behavior in MSM population.</p>

A rat model of focal lymph encephalopathy established by partial ligation of the cerebral superficial artery / 南方医科大学学报

<p><b>OBJECTIVE</b>To establish a rat model of focal lymphatic encephalopathy by partial ligation of the cerebral superficial artery for observation of the changes of Virchow-Robin spaces (VRS).</p><p><b>METHODS</b>Thirty male SD rats were randomized into 3 groups (n=10), including two model groups and a sham-operated group. The rats in the model groups were subjected to partial ligation of the cerebral superficial arteries under EEG monitoring to induce focal lymphatic encephalopathy, and those in the sham-operated group underwent only dissociation of the cerebral superficial artery without ligation. The rats in the two model groups were executed at 24 and 48 h, and those in the sham-operated group at 48 h following the operation, respectively. Frozen sections of the brain tissues were prepared for microscopic morphological observation and quantitative analysis of the VRS using HE staining and an image analysis system, respectively.</p><p><b>RESULTS</b>EEG remained normal during the operations suggesting intact brain function. Partial ligation of the cerebral superficial arteries resulted in obvious dilation of the VRS in the cerebral cortex and subcortical medulla, and the tissues around the dilated VRSs appeared pale and structurally loosened. The two model groups showed significantly enlarged VRS areas as compared to the sham-operated group (P<0.01), but no significant differences were found in the mean VRS areas between the two model groups.</p><p><b>CONCLUSION</b>Partial dilation of the cerebral superficial artery is effective and convenient to induce focal lymphatic encephalopathy in rats, and this model can be ideal for studying focal cerebral lymph circulation.</p>

Correlation of ABO groups to hypertensive intracerebral hemorrhage / 南方医科大学学报

<p><b>OBJECTIVE</b>To study the relationship between ABO blood groups and hypertensive intracerebral hemorrhage (HICH).</p><p><b>METHODS</b>The clinical data of 425 patients with HICH admitted to Nanfang Hospital were collected to analyze the relationship between the ABO blood groups and the occurrence of HICH, with normal Han Chinese subjects serving as the controls.</p><p><b>RESULTS</b>Compared to the officially documented distribution of ABO groups in Chinese population (O 34.11%, B 28.98%, A 28.29%, AB 8.69%) and in Guangzhou residents (O 46.00%, B 25.00%, A 23.00%, AB 6.00%), a significant difference was noted in the blood group distribution in this cohort (O 45.10%, A 26.00%, B 24.00%, AB 4.90%). O blood type individuals with HICH showed a higher morbidity than others. Th ABO blood type distribution in this cohort showed no significant difference from that in the control group (P>0.05), but differed significantly from the Chinese norm (P<0.05).</p><p><b>CONCLUSION</b>The ABO blood group is a factor contributing to the occurrence of HICH. O blood type is related to cerebral hemorrhage, and may serve as a risk factor for HICH.</p>

The feasibility study of estimating energy consumption in photoselective vaporization of prostate based on the volume of prostate / 中华外科杂志

<p><b>OBJECTIVE</b>To discuss the feasibility of estimating energy consumption of green laser in photoselective vaporization of prostate (PVP) based on the preoperative volume of prostate.</p><p><b>METHODS</b>From January 2005 to January 2007, 260 patients with benign prostatic hyperplasia (BPH) had been treated with PVP. Preoperative prostatic volume and post-two-weeks-operative prostatic volume of each patient were measured by transrectal ultrasound (TRUS). Energy consumption and emission time of green laser were recorded during the operation. Then we calculated the amount of energy consumption needed in vaporizing one gramme prostatic tissue, evaluated the correlation of energy consumption and preoperative volume of prostate by means of correlation-regression analysis, and established its regression equation.</p><p><b>RESULTS</b>The amount of energy consumption needed in vaporizing one gramme prostatic tissue was (6.9 ± 0.6)kJ. The correlation of energy consumption and preoperative volume of prostate was significantly positive linear correlated. Its regression equation was: Energy Consumption (kJ) = 4.7 x Preoperative Volume of Prostate (cm³) - 14.1.</p><p><b>CONCLUSION</b>It is feasible to estimate energy consumption of green laser in PVP based on preoperative volume of prostate.</p>

Association of cytochrome P4502D6 gene polymorphism with the susceptibility of heroin spongiform leucoencephalopathy / 南方医科大学学报

<p><b>OBJECTIVE</b>To elucidate the relation between cytochrome P4502D6 (CYP2D6) gene polymorphism and the susceptibility of heroin spongiform leucoencephalopathy (HSLE).</p><p><b>METHODS</b>With polymerase chain reaction-restriction fragment length polymorphism technique, the cytochrome P4502D6 gene polymorphisms were analyzed in HSLE cases and control subjects.</p><p><b>RESULTS</b>The frequencies of CYP2D6 (CYP2D6/C188, CYP2D6/L2938, CYP2D6/G4268) gene mutations were higher in HSLE patients than in the controls.</p><p><b>CONCLUSION</b>The CYP2D6 gene mutation is associated with a high risk of HSLE.</p>

Correlation between white matter lesion and memory impairment in patients with obstructive sleep apnea syndrome / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the nature of white matter lesion and correlation to memory impairment in patients with obstructive sleep apnea syndrome (OSAS) by diffusion tensor imaging ( DTI).</p><p><b>METHOD</b>We conducted a cross-sectional study of 20 middle-aged male people (10 with OSAS and 10 healthy controls) group-matched by age, educational level, and socioeconomic status. DTI was performed on those people with OSAS and on matched controls. Fractional anisotropy(FA) and average diffusion coefficient(ADC) values were measured respectively in bilateral white matter of the frontal lobe, anterior cingulate gyrus, anterior cingulum, etc. At the same time, WMS values were detected respectively.</p><p><b>RESULTS</b>Relative to controls, patients with OSAS had a lower FA in the white matter of right frontal lobe (0.444-/+0.025), splenium of corpus callosum (0.776-/+0.028 ), left anterior cingulate gyrus (0.154-/+0.021), right anterior cingulate gyrus (0.152-/+0.017), left anterior cingulum (0.372-/+0.022), right anterior cingulum (0.351-/+0.029), left centrum semiovale (0.501-/+0.029), peripheric white matter of left anterior angle (0.242-/+0.031), peripheric white matter of left posterior angle (0.338-/+0.029), peripheric white matter of right posterior angle (0.360-/+0.022 ), left parahippocampal gyrus (0.167-/+0.027), right parahippocampal gyrus (0.177-/+0.023). Besides, FA values of OSAS patients in the white matter of right frontal lobe and left centrum semiovale were strongly positively correlated with WMS values. While in comparison with that of healthy controls, ADC of OSAS patients was significantly higher in the white matter of right frontal lobe (8.589-/+0.264 x e(-10) mm(2)/s), trunk of corpus callosum (8.197-/+0.253 x e(-10) mm(2)/s), splenium of corpus callosum (8.218-/+0.194 x e(-10) mm(2)/s), left anterior cingulate gyrus (12.151-/+0.454 x e(-10) mm(2)/s), right anterior cingulate gyrus (12.113-/+0.524 x e(-10) mm(2)/s), right anterior cingulum (8.954-/+0.177 x e(-10) mm(2)/s),left centrum semiovale (7.333-/+0.220 x e(-10) mm(2)/s) and peripheric white matter of left anterior angle (9.186-/+0.465 x e(-10) mm(2)/s).</p><p><b>CONCLUSIONS</b>This study indicated that white matter and gray matter was both remarkably damaged in OSAS patients, which could contribute to memory impairment.</p>