Anti-aging and mechanism of 2-O-cinnamic acid magnolol / 药学学报

Magnolol, a hydroquinone containing an allyl side chain, is one of the major active components of magnolia for antioxidation and anti-aging. To enhance the anti-aging activity and improve the intramolecular hydrogen bonding of magnolol, magnolol was reacted with cinnamic acid to obtain 2-O-cinnamic acid magnolol by esterification. The anti-aging activity of magnolol 2-O-cinnamate was investigated based on Caenorhabditis elegans model. The results showed that 2-O-cinnamic acid magnolol can reduce lipofuscin accumulation in the nematode body, and the effect is better than that of magnolol. 2-O-Cinnamic acid magnolol can extend nematode lifespan, reduce ROS levels in nematodes during normal aging and oxidative stress and improve nematode stress resistance under heat stress and oxidative stress. 2-O-Cinnamic acid magnolol could induce DAF-16 translocation from the cytoplasm to the nucleus and upregulate the expression of the sod-3 gene encoding superoxide dismutase in the nematode TJ356 expressing DAF-16 fused with GFP. 2-O-Cinnamic acid magnolol did not improve the survival rate of hsp-16.2 gene deficient nematodes under oxidative stress, indicating that 2-O-cinnamic acid magnolol improves stress resistance of nematodes under oxidative stress may be associated with sod-3 and hsp-16.2. Moreover, 2-O-cinnamic acid magnolol did not extend the lifespan of daf-16 and age-1 mutants, indicating that age-1 and daf-16 are required for 2-O-cinnamic acid magnolol to delay aging. It showed that magnolol 2-O-cinnamic acid has the potential to improve antioxidant capacity and delay aging, and the mechanism may be related to the insulin/insulin-like growth factor signaling pathway.

Diagnosis and treatment status of perioperative anemia in patients with gastrointestinal neoplasms: a multi-center study in Hubei Province / 中华外科杂志

Objective: To investigate the incidence and treatment of perioperative anemia in patients with gastrointestinal neoplasms in Hubei Province. Methods: The clinicopathological data of 7 474 patients with gastrointestinal neoplasms in 62 hospitals in 15 cities (state) of Hubei Province in 2019 were collected in the form of network database. There were 4 749 males and 2 725 females. The median age of the patients was 62 years (range: 17 to 96 years). The hemoglobin value of the first time in hospital and the first day after operation was used as the criterion of preoperative anemia and postoperative anemia. Anemia was defined as male hemoglobin <120 g/L and female hemoglobin <110.0 g/L, mild anemia as 90 to normal, moderate anemia as 60 to <90 g/L, severe anemia as <60 g/L. The t test and χ2 test were used for inter-group comparison. Results: The overall incidence of preoperative anemia was 38.60%(2 885/7 474), and the incidences of mild anemia, moderate anemia and severe anemia were 25.09%(1 875/7 474), 11.37%(850/7 474) and 2.14%(160/7 474), respectively. The overall incidence of postoperative anemia was 61.40%(4 589/7 474). The incidence of mild anemia, moderate anemia and severe anemia were 48.73%(3 642/7 474), 12.20%(912/7 474) and 0.47%(35/7 474), respectively. The proportion of preoperative anemia patients receiving treatment was 26.86% (775/2 885), and the proportion of postoperative anemia patients receiving treatment was 14.93% (685/4 589). The proportions of preoperative anemia patients in grade ⅢA, grade ⅢB, and grade ⅡA hospitals receiving treatment were 26.12% (649/2 485), 32.32% (85/263), and 29.93% (41/137), and the proportions of postoperative anemia patients receiving treatment were 14.61% (592/4 052), 22.05% (73/331), and 9.71% (20/206). The proportion of intraoperative blood transfusion (16.74% (483/2 885) vs. 3.05% (140/4 589), χ²=434.555, P<0.01) and the incidence of postoperative complications (17.78% (513/2 885) vs. 14.08% (646/4 589), χ²=18.553, P<0.01) in the preoperative anemia group were higher than those in the non-anemia group, and the postoperative hospital stay in the preoperative anemia group was longer than that in the non-anemia group ((14.1±7.3) days vs. (13.3±6.2) days, t=5.202, P<0.01). Conclusions: The incidence of perioperative anemia in patients with gastrointestinal neoplasms is high. Preoperative anemia can increase the demand for intraoperative blood transfusion and affect the short-term prognosis of patients. At present, the concept of standardized treatment of perioperative anemia among gastrointestinal surgeons in Hubei Province needs to be improved.

Advance in Flexible Variable Stiffness Actuator of Rehabilitation Robot (review) / 中国康复理论与实践

Flexible variable stiffness actuator is divided into four categories including elastic element, pneumatic element, electric-magnetic element and intelligent material. It is gradually applied in rehabilitation robot. It could adapt the change of patient's impedance in the upper and lower limb rehabilitation robots, ensure the safety of the wearer in the exoskeleton, and improve the biomimetics in the prosthesis. Variable stiffness driving mechanism for rehabilitation robot still has some disadvantages. It is proposed to have compact structure, low power consumption, good stiffness characteristics, high response rate and progressive output torque curve, etc.

Clinical characteristics of 34 COVID-19 patients admitted to intensive care unit in Hangzhou, China / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

OBJECTIVE@#This study summarizes and compares clinical and laboratory characteristics of 34 patients admitted to the intensive care unit (ICU) for complications from coronavirus disease 2019 (COVID-19) at the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China from Jan. 22 to Mar. 5, 2020.@*METHODS@#A total of 34 patients were divided into two groups, including those who required noninvasive ventilation (NIV) and invasive mechanical ventilation (IMV) with additional extracorporeal membrane oxygenation (ECMO) in 11 patients. Clinical features of COVID-19 patients were described and the parameters of clinical characteristics between the two groups were compared.@*RESULTS@#The rates of the acute cardiac and kidney complications were higher in IMV cases than those in NIV cases. Most patients had lymphocytopenia on admission, with lymphocyte levels dropping progressively on the following days, and the more severe lymphopenia developed in the IMV group. In both groups, T lymphocyte counts were below typical lower limit norms compared to B lymphocytes. On admission, both groups had higher than expected amounts of plasma interleukin-6 (IL-6), which over time declined more in NIV patients. The prothrombin time was increased and the levels of platelet, hemoglobin, blood urea nitrogen (BUN), D-dimer, lactate dehydrogenase (LDH), and IL-6 were higher in IMV cases compared with NIV cases during hospitalization.@*CONCLUSIONS@#Data showed that the rates of complications, dynamics of lymphocytopenia, and changes in levels of platelet, hemoglobin, BUN, D-dimer, LDH and IL-6, and prothrombin time in these ICU patients were significantly different between IMV and NIV cases.

Design and Implementation of Rehabilitation Equipment Monitoring System Based on Web / 中国康复理论与实践

Objective:To design a web-based monitoring system for rehabilitation equipment in order to solve the problems of inadequate monitoring system for existing rehabilitation equipment and poor communication between doctors and patients. Methods:The system was composed of device communication layer, server layer and user access layer, which was implemented by B/S architecture. Rehabilitation equipment was connected with intelligent gateway through wireless communication module. HTTP protocol and socket communication technology were used to realize remote communication between rehabilitation equipment and platform server. The server layer mainly used MVC design pattern and J2EE technology, adopted the current popular Web framework SSM (Spring + Spring MVC + MyBatis) design, MySQL database was responsible for data storage. User access layer was designed with HTML5+JSP+Bootstrap+HighCharts+CSS+JavaScript+Ajax and other technologies. Results:By deploying the public network of the project, the remote monitoring experiment of the equipment was carried out. The upload of status information and the download of page control instructions could be responded in a short time interval. Considering the factors such as network delay, the design met the requirements. Conclusion:This system is simple to operate and efficient to transmiss data between platform and equipment. It can provide convenient service support for medical staff, patients and equipment administrators.

A Novel Four-Degree-of-Freedom Upper Limb Rehabilitation Robot / 中国康复理论与实践

Objective:A novel four-degree-of-freedom upper limb rehabilitation robot was designed to overcome the shortcomings of the structure of the most of serial robots. Methods:The shoulder and elbow joint drive system and the information detection system were placed in the base. The synchronous belt drive system and the spiral bevel gear transmission system were designed to transmit power from the base to the shoulder and elbow joint of the arm. The cubic polynomial trajectory planning method based on the joint space was selected to accomplish the trajectory planning of the recovery movements of taking objects and drawing quadrilaterals, and the single-degree-of-freedom motion control experiment and multi-degree-of-freedom trajectory planning experiment were designed to verify the rationality and feasibility of the design. Results:Each joint of the rehabilitation robot reached the designed range of motion at the designed speed, and well completed the planned rehabilitation training movements. Conclusion:This robot can effectively reduce the volume and mass of the mechanical arm, overcome the influence of motor noise and radiation on patients' rehabilitation training, and assist patients to complete a variety of rehabilitation exercises.

Research of a Wearable Lower Extremity Assisted Exoskeleton Robot System / 中国康复理论与实践

Objective:To propose a new type of lightweight wearable lower extremity exoskeleton assisted robot system, and explore the feasibility of walking and posture change rehabilitation training for patients with gait disorder and with paraplegia under T4 spinal cord injury (exclusion of lower extremity muscle spasm and obvious pain). Methods:The active and passive hybrid wearable lower extremity exoskeleton assisted robot structure of the hip joint with two-motor active drive and the knee joint passive four-link simulating the instantaneous movement of the human body was designed. Based on modular control, the STM32F767IGT6 and peripheral circuits, attitude acquisition, power supply and crutches module control system were proposed. The exoskeleton robot was worn by a normal person to perform the experiment of leveling, slope and posture transformation and analyze hip/knee /ankle joint angles during exercise, and compare the myoelectric signals of the lateral femoral and medial femoral muscles. Results:The wearer could realize the sitting-standing posture change and the flat/slope walking only based on the exoskeleton robot system, and the hip/knee/ankle angles were basically consistent with the normal walking and the electromyographic signals of the lateral femoral, medial femoral muscle significantly decreased when the robot was worn while walking. Conclusion:The active-passive hybrid lower exoskeleton assisted robot system can still achieve the rehabilitation of walking and posture change while reducing the weight. This verified the feasibility of the assisted robot system with the active dual-motor of the hip joint and the passive four-link structure of the knee joint to help the patients with paraplegia and gait disorder to walk and recover.

Kangfuxin Liquid versus Beifuji Solution in the treatment of refractory minor recurrent aphthous ulcer / 医学研究生学报

Objective The etiology and pathogenesis of recurrent aphtha ulcer (RAU) are not yet sufficiently clear and there has been no cure for it hitherto. This study aimed to compare the short-term effect of Kangfuxin Liquid (KFX) versus that of Beifuji Solution (BFJ, a topical solution of the recombinant bovine alkaline fibroblast growth factor) on refractory minor RAU (RMiRAU).Methods This prospective study included 150 cases of RMiRAU treated in Nanjing Hospital of Stomatology between March 2016 and June 2018. The patients were randomized into five groups of equal number: KFX, BFJ, oral control (oral isotonic saline), topical control (topical isotonic saline), and blank control (not treated). We measured the ulcer area and obtained the pain index at 1, 3, 5 and 7 days of treatment. We also recorded the onset time and duration of analgesia as well as the course of ulcer after initial medication.Results At 3, 5, and 7 days after treatment, the ulcer areas in the KFX group, significantly smaller than in the oral control and blank control groups, and also smaller in the BFJ than in the topical control and blank control groups (P<0.05). At 3 and 5 days, the pain indexes were (3.35±1.23) and (2.32±1.80) in the BFJ group, significantly lower than (5.08±1.83) and (3.53±1.50) in the topical control and (5.50±1.69) and (3.79±1.34) in the blank control group (P<0.05), and lower in the KFX than in the oral control ([5.29±1.73] and [3.74±1.42]) and blank control groups (P<0.05);On day 3, the pain index of the BFJ group is much smaller than the KFX liquid group (P<0.05). The course of ulcer after initial medication was remarkably shorter, the onset of analgesia significantly later, and duration of analgesia markedly shorter in the KFX than in the BFJ group (all P<0.05).Conclusion Both KFX and BFJ have a good short clinical effect on RAU. KFX has advantage in decreasingulcer duration; BFJ has fast onset time and long maintenance time.

Pemetrexed with geiftinib or pemetrexed alone in advanced non-small cell lung cancer with acquired resistance to EGFR tyrosine kinase inhibitors / 中国癌症杂志

Background and purpose:New treatment methods should be explored for non-small cell lung cancer (NSCLC) patients with acquired resistance to epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI). This study compared the curative effect of pemetrexed with geiftinib or pemetrexed alone in advanced NSCLC with acquired resistance to EGFR-TKI.Methods:This study included 62 NSCLC patients with advanced EGFRgene mutation and acquired resistance to EGFR-TKI. Among those, 32 patients were treated with pemetrexed and geiftinib, and 30 patients treated with geiftinib alone. The differences in outcomes between the two strategies were assessed.Results:Objective response rate (ORR) was 46.9% for those treated with pemetrexed and geiftinib and 20%for those treated with pemetrexed alone(χ2=4.933,P0.05). The median progression-free survival (PFS) was 8.0 months on pemetrexed and gefitinib group and 6.3 months on pemetrexed alone (χ2=8.063,P0.05). Higher occurrence of leukocytopenia and rash was observed in the pemetrexed and geiftinib group than in the pemetrexed group (P0.05).Conclusion:This study was to demonstrate that continuation of EGFR-TKI with pemetrexed in patients with acquired resistance improves outcomes compared with pemetrexed alone. An improved response rate and PFS were observed in this study. A larger prospective clinical trial is needed to further evaluate this promising strategy.

Laugier-Hunziker syndrome: a report of three cases and literature review / 国际口腔科学杂志·英文版

Laugier-Hunziker syndrome (LHS) is an acquired pigmentary condition affecting lips, oral mucosa and acral area, frequently associated with longitudinal melanonychia. There is neither malignant predisposition nor underlying systemic abnormality associated with LHS. Herein, we present three uncommon cases of LHS with possibly new feature of nail pigmentation, which were diagnosed during the past 2 years. We also review the clinical and histological findings, differential diagnosis, and treatment of the syndrome in published literature.

Design of functional small interfering RNAs targeting amyotrophic lateral sclerosis-associated mutant alleles / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>RNA interference (RNAi) is a potential cure for amyotrophic lateral sclerosis (ALS) caused by dominant, gain-of-function superoxide dismutase 1 (SOD1) mutations. The success of such therapy relies on the functional small interfering RNAs (siRNAs) that can effectively deliver RNAi. This study aimed to design the functional siRNAs targeting ALS-associated mutant alleles.</p><p><b>METHODS</b>A modified dual luciferase system containing human SOD1 mRNA target was established to quantify siRNA efficacy. Coupled with validated siRNAs identified in the literature, we analyzed the rationale of siRNA design and subsequently developed an asymmetry rule-based strategy for designing siRNA. We then further tested the effectiveness of this design strategy in converting a naturally symmetric siRNA into functional siRNAs with favorable asymmetry for gene silencing of SOD1 alleles.</p><p><b>RESULTS</b>The efficacies of siRNAs could vary tremendously by one base-pair position change. Functional siRNAs could target the whole span of SOD1 mRNA coding sequence as well as non-coding region. While there is no distinguishable pattern of the distribution of nucleobases in these validated siRNAs, the high percent of GC count at the last two positions of siRNAs (P18 and P19) indicated a strong effect of asymmetry rule. Introducing a mismatch at position 1 of the 5' of antisense strand of siRNA successfully converted the inactive siRNA into functional siRNAs that silence SOD1 with desired efficacy.</p><p><b>CONCLUSIONS</b>Asymmetry rule-based strategy that incorporates a mismatch into siRNA most consistently enhances RNAi efficacy and guarantees producing functional siRNAs that successfully silence ALS-associated SOD1 mutant alleles regardless target positions. This strategy could also be useful to design siRNAs for silencing other disease-associated dominant, gain-of-function mutant genes.</p>

Glioblastoma stem cells resistant to temozolomide-induced autophagy / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Recent studies have demonstrated the existence of a small fraction of cells with features of primitive neural progenitor cells and tumor-initiating function in brain tumors. These cells might represent primary therapeutic target for complete eradication of the tumors. This study aimed to determine the resistant phenotype of glioblastoma stem cells (GSCs) to temozolomide (TMZ) and to explore the possible molecular mechanisms underlying TMZ resistance.</p><p><b>METHODS</b>Freshly resected glioblastoma specimen was collected and magnetic isolation of GSCs was carried out using the Miltenyi Biotec CD133 Cell Isolation kit. The cytotoxic effect of TMZ on CD133(+) and CD133(-) glioblastoma cells was determined by using the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. Autophagy-related proteins (Beclin-1, LC3 and Atg5) and cleaved caspase-3 (p17) were analyzed by Western blotting. Immunofluorescent staining was used to detect Atg5, glial fibrillary acidic protein (GFAP) and CD133 expression in glioblastoma cells. Statistical analysis was carried out using SPSS 10.0 software. For all tests, the level of statistical significance was set at P < 0.05.</p><p><b>RESULTS</b>CD133(+) glioblastoma cells exhibited neurosphere-like growth in vitro and high expression of CD133 stem cell marker. The growth-inhibiting rate in CD133(-) glioblastoma cells treated with 5 or 50 micromol/L TMZ was significantly higher than that in CD133(+) glioblastoma cells ((14.36 +/- 3.75)% vs (2.54 +/- 1.36)% or (25.95 +/- 5.25)% vs (2.72 +/- 1.84)%, respectively, P < 0.05). Atg5, LC3-II and Beclin-1 levels were significantly lower in CD133(+) glioblastoma cells than those in autologous CD133(-) cells after TMZ treatment (P < 0.05). Caspase-3 was mildly activated only in CD133(-) glioblastoma cells after exposure to TMZ (P < 0.05). Immunofluorescent staining revealed elevated expression of Atg5 in GFAP(+) cells following TMZ treatment.</p><p><b>CONCLUSIONS</b>The GSCs display strong capability of tumor's resistance to TMZ. This resistance is probably contributed by the CD133(+) cells with down-regulation of autophagy-related proteins. Future treatment should target this small population of cancer stem cells in tumors to improve survival of patients.</p>

Alzheimer's disease: epidemiology, genetics, and beyond / 神经科学通报·英文版

Alzheimer's disease (AD) is an increasing epidemic threatening public health. Both men and women are susceptible to the disease although women are at a slightly higher risk. The prevalence of AD rises exponentially in elderly people from 1% at age of 65 to approximately 40%-50% by the age of 95. While the cause of the disease has not been fully understood, genetics plays a role in the onset of the disease. Mutations in three genes (APP, PSEN1, and PSEN2) have been found to cause AD and APOE4 allele increases the risk of the disease. As human genomic research progresses, more genes have been identified and linked with AD. Genetic screening tests for persons at high risk of AD are currently available and may help them as well as their families better prepare for a later life with AD.

Migraine as a sex-conditioned inherited disorder: evidences from China and the world / 神经科学通报·英文版

Migraine is a complex and heterogeneous disorder. Although several genetic models has been proposed including autosomal-dominant/autosomal recessive, sex-linked, sex-limited, mitochondrial, and multi-gene, none of these models can well-explain the transmission of the disease. We hypothesied that migraine is a sex-conditioned inherited disorder (autosomal dominant in females and autosomal recessive in males). This hypothesis is supported by the evidence such as the locations of genes associated with familial hemiplegic migraine, possibly "typical" migraine as well (dominantly on chromosome 19p, 1q, and 2q), male:female ratio of prevalence (1:2-1:4), the mostly youth-onset, the provocation by the contraceptives, the induction by menstruation, and the self-limitation after menopause. Female sex-hormones appear to be the key contributor to a higher prevalence of migraine in female. Socio-environmental factors may also play an important role.

DNA-dependent protein kinase activity and radiosensitivity of nasopharyngeal carcinoma cell lines CNE1/CNE2 / 生理学报

The present study investigated the relationship between DNA-dependent protein kinase (DNA-PK) and radiosensitivity of nasopharyngeal carcinoma (NPC) cell lines. The dose-survival relationship for NPC cell lines, CNE1 and CNE2, was analyzed using clonogenic formation assay, the activity of DNA-PK of the two cell lines was measured using the Signa TECT DNA-PK assay kit, and the localization and expression of Kus (a heterodimer) and DNA-PKcs protein in CNE1 and CNE2 before irradiation and 15 min, 1 h, 6 h, 12 h, 24 h after 4 Gy irradiation were analyzed by immunofluorescence, laser scanning confocal microscope (LSCM) and Western blot. The results showed that the surviving fraction of CNE1 was higher than that of CNE2 at each dose. The DNA-PK activity of CNE1 was also significantly higher than that of CNE2 before and after irradiation (P<0.05), while the expression of total Ku70/Ku80 in CNE1 and CNE2 had no significant difference. Increasing translocation of Ku70 and Ku80 from the cytoplasm to the nuclei in the two cell lines was observed with increase of irradiation time as detected by Western blot, and the immunofluorescence of the DNA-PK complex subunits showed greater nuclear translocation in CNE1 than CNE2 after irradiation. The results suggest that the relatively higher radio-resistance of CNE1 correlates with the higher activity of DNA-PK as compared to that of more radiosensitive CNE2 (or lower radio-resistance) before and after irradiation. Thus, DNA-PK activity may be a useful predictor of radiosensitivity of NPC.

Correlation of DNA-PK activity with anti-cancer drug-sensitivity in human gliomas / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the relationship between DNA-dependent protein kinase (DNA-PK) activity and anti-cancer drug sensitivity in human glioma tissues.</p><p><b>METHODS</b>Human glioma specimens were primarily cultured and its sensitivity to several anti-cancer drugs were evaluated by MTT assay. Nuclear protein was extracted from the glioma sample of the same patient and its DNA-PK activity was determined by a biotinylated DNA-PK assay with p53-derived peptide as a specific substrate.</p><p><b>RESULTS</b>DNA-PK activity varied widely among these glioma samples. Of all 36 samples, 16 showed higher DNA-PK activity (relative activity > or = 0.40) and 20 samples with lower DNA-PK activity (relative activity < 0.40). The gliomas sensitive to DDP and VCR as evaluated by inhibition rate (IR > or = 50%) under plasma peak concentration (PPC) showed lower DNA-PK activity than the resistant ones (IR < 50%) (t = -3.445, P < 0.01). Furthermore, the gliomas with higher DNA-PK activity showed lower inhibition rate (IR < 50%) than those with lower DNA-PK activity ones (t = -2.145, P < 0.05).</p><p><b>CONCLUSION</b>DNA-PK activity is significantly associated with anti-cancer drug sensitivity to DDP and VCR in human gliomas. DNA-PK activity could be used as a new biomarker for the chemotherapy sensitivity of human gliomas.</p>

Exploration on the regulation mode of medical device quality and safety on a life-circle basis / 中国医疗器械杂志

A new conception of the life-circle state regulation for medical device's quality and safety is analyzed in the paper. The life-circle model and its corresponding regulation methods are discussed according to the characteristics of medical devices. Then, the regulation mode for application quality and safety of medical devices in a life-circle regulation system is explored.

Transfection of human hepatic stimulator substance gene could protect BEL-7402 cells against hepatotoxins / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate protective effects of hHSS transfection against CCl4 or H2O2.</p><p><b>METHODS</b>cDNA coding for hHSS was constructed into eukaryotic vector of pcDNA3.1 and transfected into BEL-7402 hepatoma cells. The expression of hHSS was analyzed with Northern blot.</p><p><b>RESULTS</b>The growth of the hepatoma cells was remarkably enhanced 24 to 144h after hHSS gene transfection, which suggesting hHSS gene expression could stimulate cells activity. Meantime, incubation of both wild-type and vector-transfected as well as hHSS-transfected cells with CCl4 or H2O2 resulted in severe damage as marked by cell mortality and the rate of apoptosis. However, it appeared that the transfection of hHSS enabled the hepatoma cells to raise obvious resistance against CCl4 and H2O2 injury. Compared the vector cells to the vector-transfected cells, apoptosis ratio were (32.44+/-0.52)% and (25.60+/-0.66)% in which treated with CCl4, while (47.78+/-0.45)% and (37.40+/-0.69)% in which treated with H2O2, t value is 16.82 and 25.20, P<0.01. MAPK phosphorylation was also activated after HSS transfected.</p><p><b>CONCLUSION</b>The function of hHSS gene expression could be related to proliferation of cell and protection against free radical damage.</p>

Significance of a novel fetal RNA-binding protein p62 expression in hepatocellular carcinoma / 中华病理学杂志

<p><b>OBJECTIVE</b>To investigate the histological characteristics of hepatocellular carcinoma with p62 expression, and the correlation of p62 protein with biological characteristics of the cancer cells such as proliferation and metastasis.</p><p><b>METHODS</b>The immunohistochemical expression of p62 and Ki-67 were studied in 40 primary hepatocellular carcinomas.</p><p><b>RESULTS</b>67.5% (27/40) exhibited positive staining of p62 protein in the cytoplasm of malignant cells, of which the strong positivity was mainly found in pathologic grade III cases. The cases with strong positive staining of p62 exhibited extensive fibrosis in the stroma and massive necrosis of the tumor. These cases also exhibited high proliferation activity, the mean Ki-67 labeling index was 28.3% +/- 15.1%, which was significantly higher than that in p62 negative ones (t = 3.087, P = 0.005). Three of five cases with lung or celiac lymph node metastasis exhibited strong positive staining of p62.</p><p><b>CONCLUSION</b>There is some relationship between the expression of p62 protein, proliferation activity and metastasis of cancer cells as well as with the microenvironment which have abundant fibrous tissue in the stroma.</p>

Resonance Rayleigh scattering spectra of berberine-tetraphenylboron association nanoparticle and its analytical application / 药学学报

<p><b>AIM</b>To study the relationship between resonance Rayleigh scattering(RRS) and the formation of association nanoparticle, and to develop a new and sensitive RRS method for the determination of trace berberine (BB).</p><p><b>METHODS</b>The association nanoparticle between BB and tetraphenylboron (TPB) was investigated by means of RRS, absorption spectral method and transmission electron microscope (TEM).</p><p><b>RESULTS</b>In pH 5.0 NaAc-HAc buffer solution, BB and TPB combine to BB-TPB association complex. The association complexes aggregate to (BB-TPB)n association nanoparticles, due to the strong hydrophobic force and Van der Waals force. It exhibits a resonance Rayleigh scattering peak at 470 nm, a maximum absorption peak at 368 nm. A new RRS method was proposed for the determination of 0.06 to 5.28 mg.L-1 BB in real samples with satisfactory results. The detection limit is 26 micrograms.L-1.</p><p><b>CONCLUSION</b>The TEM of (BBjAgp-TPBj + p)h composite association nanoparticles was observed by means of composite association nanoreaction both TPB- and BB+ or Ag+. The results indicated that the formation of (BB-TPB)n association nanoparticles and interface of solid-liquid results in the enhanced resonance light-scattering. This new RRS method showed high sensitivity, and had been successfully applied to the determination of BB in real samples.</p>