Quantitative characterization of cell physiological state based on dynamical cell mechanics for drug efficacy indication / 药物分析学报

Cell mechanics is essential to cell development and function,and its dynamics evolution reflects the physiological state of cells.Here,we investigate the dynamical mechanical properties of single cells under various drug conditions,and present two mathematical approaches to quantitatively character-izing the cell physiological state.It is demonstrated that the cellular mechanical properties upon the drug action increase over time and tend to saturate,and can be mathematically characterized by a linear time-invariant dynamical model.It is shown that the transition matrices of dynamical cell systems signifi-cantly improve the classification accuracies of the cells under different drug actions.Furthermore,it is revealed that there exists a positive linear correlation between the cytoskeleton density and the cellular mechanical properties,and the physiological state of a cell in terms of its cytoskeleton density can be predicted from its mechanical properties by a linear regression model.This study builds a relationship between the cellular mechanical properties and the cellular physiological state,adding information for evaluating drug efficacy.

Enhanced nitrogen removal by bioelectrochemical coupling anammox and characteristics of microbial communities / 生物工程学报

To investigate the bioelectrochemical enhanced anaerobic ammonia oxidation (anammox) nitrogen removal process, a bioelectrochemical system with coupled anammox cathode was constructed using a dual-chamber microbial electrolysis cell (MEC). Specifically, a dark incubation batch experiment was conducted at 30 ℃ with different influent total nitrogen concentrations under an applied voltage of 0.2 V, and the enhanced denitrification mechanism was investigated by combining various characterization methods such as cyclic voltammetry, electrochemical impedance spectroscopy and high-throughput sequencing methods. The results showed that the total nitrogen removal rates of 96.9%±0.3%, 97.3%±0.4% and 99.0%±0.3% were obtained when the initial total nitrogen concentration was 200, 300 and 400 mg/L, respectively. In addition, the cathode electrode biofilm showed good electrochemical activity. High-throughput sequencing results showed that the applied voltage enriched other denitrifying functional groups, including Denitratisoma, Limnobacter, and ammonia oxidizing bacteria SM1A02 and Anaerolineaceae, Nitrosomonas europaea and Nitrospira, besides the anammox bacteria. These electrochemically active microorganisms comprised of ammonium oxidizing exoelectrogens (AOE) and denitrifying electrotrophs (DNE). Together with anammox bacteria Candidatus Brocadia, they constituted the microbial community structure of denitrification system. Enhanced direct interspecies electron transfer between AOE and DNE was the fundamental reason for the further improvement of the total nitrogen removal rate of the system.

Advances in lignin valorization from a biorefinery concept / 生物工程学报

Lignin valorization for fuels and value-added products is essential to enhance the profitability and sustainability of biorefineries. Due to the complex and heterogeneous structure of lignin, technical barriers hinder the implementation of economic lignin utilization. Here, we summarize the major challenges facing lignin valorization processes. Different pretreatment methods, especially emerging combinatorial pretreatment approaches for isolating and tailoring lignin are introduced. To overcome the heterogeneity of lignin structure and improve lignin processability, advances in fractionation approaches including organosolv extraction, membrane technology, and gradient precipitation are analyzed and presented. Furthermore, progress in lignin valorization by thermochemical and biological conversion coupling with pretreatment and fractionation are systematically reviewed. Finally, we discuss advanced strategies and perspectives for future research involving biomass pretreatment, lignin fractionation and conversion processes.

Comparison between laparoscopic and abdominal radical hysterectomy for stage IB1 and tumor size <2 cm cervical cancer with visible or invisible tumors: a multicentre retrospective study / 부인종양

Objective@#To compare 5-year disease-free survival (DFS) and overall survival (OS) rates of laparoscopic radical hysterectomy (LRH) and abdominal radical hysterectomy (ARH) for stage IB1 and tumor size <2 cm with visible or invisible tumors. @*Methods@#We retrospectively compared the oncological outcomes of 1,484 cervical cancer patients with IB1 and tumor size <2 cm on final pathology, who received ARH (n=899) or LRH (n=585) between January 2004 and December 2016. Patients were divided into visible tumor subgroup (ARH: n=668, LRH: n=444) and invisible tumor subgroup (ARH: n=231, LRH:n=141) according to tumor type. @*Results@#LRH and ARH showed similar 5-year DFS and OS rates (93.3% vs. 93.1%, p=0.997;96.2% vs. 97.5%, p=0.351) in total study population. LRH was not associated with worse 5-year DFS rate (hazard ratio [HR]=0.96; 95% confidence interval [CI]=0.58–1.58; p=0.871) or OS rate (HR=1.37; 95% CI=0.65–2.89; p=0.409) by multivariable analysis. In the visible tumor subgroups, LRH and ARH showed similar 5-year DFS and OS rates (91.9% vs. 91.9%, p=0.933; 95.0% vs. 96.9%, p=0.276), and LRH was not associated with worse 5-year DFS or OS rate (p=0.804, p=0.324). In the invisible tumor subgroups, LRH and ARH also showed similar 5-year DFS and OS rates (97.3% vs. 97.1%, p=0.815; 100% vs. 99.5%, p=0.449), and LRH was not associated with worse 5-year DFS rate (p=0.723). @*Conclusions@#Among patients with stage IB1 and tumor size <2 cm, whether the tumor is visible or not, the oncological outcomes of LRH and ARH among cervical cancer patients are comparable. This suggests that LRH may be suitable for stage IB1 and tumor size <2 cm with visible or invisible tumors.

Cervical Cancer Screening Rate and Willingness among Female Migrants in Shenzhen, China: Three-Year Changes in Citywide Surveys / Journal of the Korean Cancer Association, 대한암학회지

Purpose@#This study attempted to detect the changes of cervical cancer screening rate and willingness among female migrants, and the associated socio-demographic factors in Shenzhen city. @*Materials and Methods@#Two citywide surveys were conducted using a multistage random cluster sampling method in 2011 and 2014, respectively. Data on demographic characteristics, screening participation, and willingness to screen were collected. Logistic regression models were applied to detect possible associated socio-demographic characteristics, and their variations with survey years. @*Results@#In total, 12,017 female migrants were enrolled, with a mean age (standard deviation) of 36.73 (6.55) years. From 2011 to 2014, the screening rate increased (25.8% vs. 35.1%, p < 0.001), while the willingness to screen remained stable (82.2% vs. 82.8%, p=0.46). Overall, socio-demographic characteristics of female migrants, including age, marital status, education, monthly income, employment, and medical insurance, were found to be positively associated with screening participation. Similar impacts in relation to willingness were observed except for age. However, these associations varied with survey years, mainly in the contributions of education and monthly income to screening participation, as well as age, monthly income, and medical insurance to willingness of being screened. @*Conclusion@#Identifying changes of associated socio-demographic factors precisely is warranted of necessity, which provides novel clues to adjust targeted actions regularly in promoting cervical cancer screening participation among female migrants in Shenzhen.

Inequalities in Awareness and Attitude towards HPV and Its Vaccine between Local and Migrant Residents Who Participated in Cervical Cancer Screening in Shenzhen, China / Journal of the Korean Cancer Association, 대한암학회지

Purpose@#A cross-sectional survey was conducted to evaluate the differences on awareness and attitude towards human papillomavirus (HPV) and its vaccine between local and migrant residents who participated in cervical cancer screening in Shenzhen, China. @*Materials and Methods@#A total of 9,855 females sampled from healthcare institutions in 20 street blocks through the Cervical Cancer Prevention Network were surveyed in this study by a self-administered questionnaire. Multivariate logistic regression was conducted to explore the role of the hukou and resident status in the willingness to receive HPV vaccination. @*Results@#Local residents had a relatively higher awareness of HPV (62.0% vs. 35.6% vs. 29.9%, p 0.05). @*Conclusion@#Inequalities in awareness and attitude towards HPV and its vaccine existed between local and migrant residents in Shenzhen. The hukou and resident status did impact on the willingness to receive HPV vaccination, therefore, it is critical to implement effective health education campaigns on HPV and its vaccine among internal migrants.

Study on growth characteristics of under different conditions and its toxicity / 浙江大学学报·医学版

OBJECTIVE@#To investigate the characteristics of growth and metabolism and the toxicity of under different conditions.@*METHODS@#We observed the growth of and under routine culture conditions and in different pH and salt concentrations, and compared their activities of sugar fermentation using microbiochemical reaction tubes. Four-week-old nude mice were randomized into infection group (=5), infection group (=5) and control group (=5) for intragastric administration of 0.3 mL suspension the two (5×10 cfu/mL) or 0.3 mL normal saline. Samples of the liver, kidney, intestine, feces and blood were taken for analysis of the distribution and toxicity of by fungal culture and histopathological examination.@*RESULTS@# exhibited logarithmic growth at 8-24 h after inoculation and showed stable growth after 24 h. showed optimal growth within the pH value range of 5-7 with a growth pattern identical to that of . grew better than in media containing 5% and 10% NaCl, and could ferment glucose, sucrose, trehalose and sorbitol. could be isolated from the feces, blood, liver and kidney of infected nude mice, and the liver had the highest fungal load (5.7 log cfu/g). could cause pathological changes in the liver and intestine of the mice, but with a lesser severity as compared with .@*CONCLUSIONS@# exhibits optimal growth in mildly acidic or neutral conditions with a high salt tolerance, and can potentially penetrate the intestinal barrier into blood and lead to tissue injuries in hosts with immunosuppression.

Strategies of strengthening the supporting role of science and technology in public health emergency: A case study on the COVID-19 / 中华医学科研管理杂志

Objective:The research was aimed to discuss the role of science and technology research in the public health emergency response, and to provide theoretical support for building Healthy China, implementing the National Strategy of Innovation-Driven Development.Methods:Take COVID-19 as an example, to sum up the characteristics and the function of science and technology research in the public health emergency prevention and control system.Results:In order to make the scientific and technological research as the supporting system in public health emergency, we need to strengthen the basic research, to improve the research and development for controlling product with the independent intellectual property, to optimize the training system and evaluating system in public health technology, to deepen the international collaboration and to popularize the basic scientific knowledge.Conclusions:Through systematically arrangement for disease controlling and prevention, for the industrial supporting, for the health improvement, for the talent training system and for the cooperation and the communication, we need to fasten the technological innovation for better preparation and responding to public health emergencies.

Study on growth characteristics of under different conditions and its toxicity / 南方医科大学学报

OBJECTIVE@#To investigate the characteristics of growth and metabolism and the toxicity of under different conditions.@*METHODS@#We observed the growth of and under routine culture conditions and in different pH and salt concentrations, and compared their activities of sugar fermentation using microbiochemical reaction tubes. Four-week-old nude mice were randomized into infection group (=5), infection group (=5) and control group (=5) for intragastric administration of 0.3 mL suspension the two (5×10 cfu/mL) or 0.3 mL normal saline. Samples of the liver, kidney, intestine, feces and blood were taken for analysis of the distribution and toxicity of by fungal culture and histopathological examination.@*RESULTS@# exhibited logarithmic growth at 8-24 h after inoculation and showed stable growth after 24 h. showed optimal growth within the pH value range of 5-7 with a growth pattern identical to that of . grew better than in media containing 5% and 10% NaCl, and could ferment glucose, sucrose, trehalose and sorbitol. could be isolated from the feces, blood, liver and kidney of infected nude mice, and the liver had the highest fungal load (5.7 log cfu/g). could cause pathological changes in the liver and intestine of the mice, but with a lesser severity as compared with .@*CONCLUSIONS@# exhibits optimal growth in mildly acidic or neutral conditions with a high salt tolerance, and can potentially penetrate the intestinal barrier into blood and lead to tissue injuries in hosts with immunosuppression.

Strategies of strengthening the supporting role of science and technology in public health emergency: A case study on the COVID-19 / 中华医学科研管理杂志

Objective@#The research was aimed to discuss the role of science and technology research in the public health emergency response, and to provide theoretical support for building Healthy China, implementing the National Strategy of Innovation-Driven Development.@*Methods@#Take COVID-19 as an example, to sum up the characteristics and the function of science and technology research in the public health emergency prevention and control system.@*Results@#In order to make the scientific and technological research as the supporting system in public health emergency, we need to strengthen the basic research, to improve the research and development for controlling product with the independent intellectual property, to optimize the training system and evaluating system in public health technology, to deepen the international collaboration and to popularize the basic scientific knowledge.@*Conclusions@#Through systematically arrangement for disease controlling and prevention, for the industrial supporting, for the health improvement, for the talent training system and for the cooperation and the communication, we need to fasten the technological innovation for better preparation and responding to public health emergencies.

Detection and clinical significance of EGFL7 and P185 protein in tissues and serum of patients with breast cancer / 国际肿瘤学杂志

Objective@#To detect the expressions of epidermal growth factor-like domain 7 (EGFL7) and P185 protein in breast cancer tissues and serum, and to analyze the correlation between the expression levels of EGFL7 and P185 in tissues and clinicopathological parameters of breast cancer patients.@*Methods@#Sixty patients with breast cancer in Hunan Cancer Hospital from March 2016 to March 2018 were collected as observation group, and 60 patients with breast benign lesions in the hospital during the same period were selec-ted as control group. The expressions of EGFL7 and P185 protein in tissues of patients in the two groups were detected by immunohistochemical two-step method, and the levels of EGFL7 and P185 protein in serum of patients in the two groups were detected by enzyme-linked immunosorbent assay (ELISA). The relationships between the expressions of EGFL7 and P185 protein and clinicopathological parameters of breast cancer patients were analyzed.@*Results@#The positive rates of EGFL7 in tissues in the observation group and the control group were 65.00% (39/60) and 28.33% (17/60), and there was a significant difference between the two groups (χ2=16.205, P<0.001). The positive rates of P185 in tissues in the two groups were 43.33% (26/60) and 15.00% (9/60), and there was a significant difference between the two groups (χ2=11.657, P=0.001). The serum levels of EGFL7 protein in the observation group and the control group were (3.39±0.38) μg/ml and (2.75±0.31) μg/ml respectively, with a significant difference (t=10.109, P<0.001). The serum levels of P185 protein in the two groups were (7.12±0.75) μg/ml and (6.08±0.62) μg/ml respectively, with a significant difference (t=8.279, P<0.001). The positive expression of EGFL7 protein was closely related to tumor size (χ2=6.128, P=0.013), TNM stage (χ2=7.781, P=0.005) and metastasis (χ2=5.444, P=0.020). The positive expression of P185 protein was closely related to tumor size (χ2=8.910, P=0.003) and TNM stage (χ2=8.024, P=0.005).@*Conclusion@#The levels of EGFL7 and P185 protein are high in breast cancer tissues and serum, and their positive expressions are related to tumor size and TNM stage. EGFL7 and P185 proteins play important roles in the progression of breast cancer.

Impact of cessation of antiviral therapy at delivery on postpartum liver function in mothers with chronic hepatitis B virus infection / 中华肝脏病杂志

Objective@#To investigate the impact of immediate cessation of antiviral therapy on postpartum liver function and the factors influencing postpartum abnormality in mothers with chronic hepatitis B virus infection.@*Methods@#A retrospective cohort study was conducted. One hundred eighty-eight pregnant women with HBV DNA level > 2×106 IU/ml were enrolled from June 2014 to June 2018. Demographic information and clinical data of liver function and HBV DNA load during gravidity, intrapartum and postpartum period were collected. According to the antiviral treatment recommendations during pregnancy, the women were divided into three groups, namely, tenofovir (TDF), telbivudine (LdT) and control group. Liver function abnormalities among the three groups were compared within 6 months after delivery, and the factors influencing abnormal liver function were analyzed by unconditional logistic regression.@*Results@#Of the 188 cases, 72 cases were in the TDF group, 80 cases in the LdT group, and 36 cases in the control group. Pregnant women in the TDF and LdT groups received oral TDF (300 mg/d) and LdT (600 mg/d) from 28 ± 4 weeks of gestation till delivery. Among the 188 patients, 30 (16.0%) had abnormal postpartum liver function abnormality. The incidence of postpartum liver function abnormality [alanine aminotransferase (ALT) > 2 × upper limit of normal (ULN)] in the TDF, LdT, and control groups was 19.4%, 12.5%, and 16.7%, respectively. The postpartum peak levels of ALT (median, range) in the three groups were 34.5 (12.0-946.0) U/L, 37.5 (12.0-733.8) U/L, and 39.0 (7.0-513.0) U/L, respectively. There was no significant difference between the two indexes among the three groups (P > 0.05). There was no statistically significant difference in the degree of postpartum liver function abnormalities between the three groups (P = 0.944). Most of the liver function abnormalities were mild to moderate (2 × ULN≤ALT < 10 × ULN), and usually resolved spontaneously or by treatment. Univariate and multivariate analysis showed that baseline ALT level during pregnancy was an independent factor associated with postpartum liver function abnormality (OR = 1.031, CI 95%: 1.005-1.058; χ2 = 5.340, P = 0.021), whereas age, antiviral therapy, HBeAg-positivity, baseline HBV DNA levels, gravidity, parity, preterm delivery and delivery mode were not significantly associated with postpartum liver function abnormality.@*Conclusion@#Cessation of antiviral therapy after delivery did not significantly increase the risk of postpartum liver function abnormality in pregnant women with chronic HBV infection. The ALT level during pregnancy is a factor influencing postpartum liver function abnormality.

Organizing an assembly to eliminate hepatitis B virus through a project zero mother-to-child transmission of hepatitis B virus / 中华肝脏病杂志

The China Foundation of Hepatitis Prevention and Control (CFHPC) initiated a project named, "getting to zero mother-to-child transmission of Hepatitis B," in July 2015, which aims to further reduce the incidence of mother-to-child transmission through standardized follow-up management of pregnant women and their infants with chronic hepatitis B virus infection by means of mobile medical application. Over the past three years, the project has established a nationwide collaborative network for interruption of mother-to-child transmission of hepatitis B virus, with 123 hospitals as project members. In addition, it has formulated a technical guidance document (Clinical Management Algorithm for Interrupting Mother-to-Child Transmission of HBV), which is designed and developed as a mobile medical application (SHIELD APP), and was released in an international conference on the theme to eliminate viral hepatitis. Following the measures mentioned above, the public's awareness rate of hepatitis B have been raised, and a good social atmosphere has been formed, which has played a positive role in promoting the prevention and control of viral hepatitis in China.

Action for shield project promoting zero mother-to-child transmission of hepatitis B virus / 中华肝脏病杂志

The World Health Organization(WHO)has set the goal to eliminate viral hepatitis as a public health threat by 2030, and the key to achieve this ambitious goal lies on the standardized and precise management of pregnant women and their infants by effectively blocking mother-to-child transmission (MTCT) of hepatitis B virus (HBV). Standardized management includes screening and antiviral intervention during pregnancy, infant immunization, and evaluation of immune effect, breastfeeding and mode of delivery. The results of randomized controlled clinical trials and real-world data have confirmed that the comprehensive prevention strategy based on combined immune prophylaxis of neonates can effectively block MTCT of HBV. It is one of the key links to eliminate viral hepatitis in our country, and to formulate a new strategy in line with the public health needs at home and abroad and thereby promote the implementation and application of standardized management process to improve the public's awareness of the disease.

Detection and clinical significance of EGFL7 and P185 protein in tissues and serum of patients with breast cancer / 国际肿瘤学杂志

Objective To detect the expressions of epidermal growth factor-like domain 7 (EGFL7) and P185 protein in breast cancer tissues and serum,and to analyze the correlation between the expression levels of EGFL7 and P185 in tissues and clinicopathological parameters of breast cancer patients. Methods Sixty patients with breast cancer in Hunan Cancer Hospital from March 2016 to March 2018 were collected as observation group,and 60 patients with breast benign lesions in the hospital during the same period were selec-ted as control group. The expressions of EGFL7 and P185 protein in tissues of patients in the two groups were detected by immunohistochemical two-step method,and the levels of EGFL7 and P185 protein in serum of patients in the two groups were detected by enzyme-linked immunosorbent assay (ELISA). The relationships between the expressions of EGFL7 and P185 protein and clinicopathological parameters of breast cancer patients were analyzed. Results The positive rates of EGFL7 in tissues in the observation group and the control group were 65. 00％ (39 / 60)and 28. 33％ (17 / 60),and there was a significant difference between the two groups (χ2 = 16. 205,P < 0. 001). The positive rates of P185 in tissues in the two groups were 43. 33％ (26 / 60)and 15. 00％ (9 / 60),and there was a significant difference between the two groups (χ2 = 11. 657,P = 0. 001). The serum levels of EGFL7 protein in the observation group and the control group were (3. 39 ± 0. 38)μg/ ml and (2. 75 ± 0. 31)μg/ ml respectively,with a significant difference (t = 10. 109,P < 0. 001). The serum levels of P185 protein in the two groups were (7. 12 ± 0. 75)μg/ ml and (6. 08 ± 0. 62)μg/ ml respectively, with a significant difference (t = 8. 279,P < 0. 001). The positive expression of EGFL7 protein was closely related to tumor size (χ2 = 6. 128,P = 0. 013),TNM stage (χ2 = 7. 781,P = 0. 005)and metastasis (χ2 =5. 444,P = 0. 020). The positive expression of P185 protein was closely related to tumor size (χ2 = 8. 910, P = 0. 003)and TNM stage (χ2 = 8. 024,P = 0. 005). Conclusion The levels of EGFL7 and P185 protein are high in breast cancer tissues and serum,and their positive expressions are related to tumor size and TNM stage. EGFL7 and P185 proteins play important roles in the progression of breast cancer.

Investigation and research of physics technique and quality assurance for radiotherapy in east guangdong province / 中华放射肿瘤学杂志

Objective To investigate the physics technique and quality assurance (QA) during radiotherapy in the institutions from the East Guangdong province,aiming to provide reference for the construction of radiotherapy discipline and rational allocation of resources in the primary hospitals from the eastern Guangdong province.Methods From March 15 to May 20,2016,the general conditions,radiotherapy equipment,available technique and quality assurance (QA) in the medical institutions from eastern Guangdong were investigated and analyzed by online combined with on-spot surgery.Results There were 8 institutions which provided radiotherapy with 966 ward beds,a daily capacity of 632 patients and 222 radiotherapy practitioners.Radiotherapy equipment included 12 linear accelerators,5 after-loading devices,1γ-knife,8 CT simulators and 9 radiotherapy planning systems.Five institutions performed IMRT/VMAT,IGRT and ART.Dose verification was performed before precision radiotherapy delivery in all institutions except for 1 center.QA procedures were missing for the linear accelerators,CT simulators and after-loading devices.Short-term advanced studies and hand-by-hand teaching were the main approaches for staff professional training.Conclusions The resource allocation for radiotherapy in the medical centers from the eastern Guangdong province is scarce.The technique and QC levels greatly differ among different institutions.Standard QA protocols are urgently to be established and implemented.Extensive attentions should be paid to the the professional training for technicians.

S100A7 promotes the metastasis and epithelial-mesenchymal transition on HeLa and CaSki cells / 中华妇产科杂志

Objective To elucidate the impact of over-expression of S100A7 on migration,invasion,proliferation, cell cycle, and epithelial-mesenchymal transition (EMT) in human cervical cancer HeLa and CaSki cells.Methods(1)Immunohistochemistry of SP was used to examine the expression of S100A7 in 40 cases of squamous cervical cancer tissues and 20 cases of normal cervical tissues.(2)The vectors of pLVX-IRES-Neo-S100A7 and pLVX-IRES-Neo were used to transfect human cervical cancer HeLa and CaSki cells, and the positive clones were screened and identified. Next, transwell migration assay, cell counting kit-8(CCK-8)assay and fluorescence activating cell sorter(FACS)were used to detect the effect of S100A7-overexpression on the migration, invasion, proliferation and cell cycle of cervical cancer cells. Furthermore, western blot was performed to observe the expression of epithelial marker(E-cadherin)and mesenchymal markers(N-cadherin,vimentin,and fibronectin)of EMT. Results(1)S100A7 expression was significantly higher in cervical squamous cancer tissues(median 91.6)than that in normal cervical tissues(median 52.1;Z=-2.948,P=0.003).(2)Stable S100A7-overexpressed cells were established using lentiviral-mediated gene delivery in HeLa and CaSki cells. S100A7 was detected by real-time quantitative reverse transcription PCR,S100A7 mRNA of S100A7-overexpressed cells were 119 ± 3 and 177 ± 16, increased significantly compared with control groups of median(P<0.01).Compared with the control cells, the number of S100A7-overexpressed HeLa and CaSki cells that passed the transwell membrane assay were increased significanatly(572 ± 51 vs 337 ± 25, P<0.01;100 ± 8 vs 41 ± 4, P<0.01).Matrigel invasion assay showed that the number of S100A7-overexpressed HeLa and CaSki cells that passed the transwell membrane were respectively 441±15 and 110±14,elevated significantly compared with control cells(156±21 and 59±7;P<0.05). However, S100A7 overexpression didn′t influence the proliferation and cell cycle progression of HeLa and CaSki cells(P>0.05). Expression of E-cadherin was dramatically decreased, while N-cadherin, vimentin, and fibronectin increased in S100A7-overexpressed cells. Conclusion S100A7 enhances the migration, invasion and EMT of HeLa cells and CaSki cells, and may be plays an important role in the development of cervical cancer.

Influence of UCHL5 on proliferation and apoptosis of SW527 breast cancer cells / 中华肿瘤杂志

Objective@#To investigate the effect of UCHL5 on proliferation and apoptosis of breast cancer cells.@*Methods@#SW527 cells were infected with lentiviral vector carrying short hairpin RNA to delete the expression of UCHL5. 3-(4, 5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay was used to examine cell proliferation, and subcutaneous transplantation experiments were performed to detect tumor growth. Cell apoptosis was detected using Annexin V/ Propidium iodide (PI) double staining. The correlation between UCHL5 expression and the expressions of proliferation and apoptosis associated genes was analyzed using TCGA breast invasive carcinoma data set. The relationship between UCHL5 expression and breast cancer patients′survival was analyzed using Kaplan-Meier Plotter online tool.@*Results@#After knockdown of UCHL5, A values of SW527 cells on day 2 and day 4 were 0.822±0.017 and 1.045±0.023, respectively, which were significantly lower than 0.976±0.016 and 1.284±0.025 of control cells on day 2 and day 4 (P<0.001). In vivo xenografted mouse model, the volume in UCHL5-suppressed group was (166.90±75.05) mm3, significantly smaller than (329.80±35.84) mm3 in control group (P=0.029). Flow cytometry analysis showed the apoptotic rate of SW527 cells was (8.60±1.13)% after knockdown of UCHL5, significantly higher than (2.95±0.07)% of control group (P=0.020). TCGA database analysis showed that the expression of UCHL5 was positively correlated with the expressions of genes related to cell proliferation, in paralled with the increased expression of UCHL5, the expression of the pro-apoptosis associated genes was decreased. Kaplan-Meier Plotter analysis demonstrated that the overall survival and relapse-free survival of breast cancer patients with high expression of UCHL5 were much shorter (all P<0.001).@*Conclusions@#Down-regulation of UCHL5 inhibits the proliferation and tumor formation and promotes apoptosis of SW527 cells. High expression of UCHL5 may predict poor prognosis of breast cancer patients.

Risk stratification of type-specific human papillomavirus for cervical precancers: evidence from a cross-sectional study in Shenzhen / 中华肿瘤杂志

Objective@#To analyze the epidemiological genotype features of human papillomavirus (HPV) in cervical infection and their risks for cervical precancers among women in Shenzhen area.@*Methods@#A total of 2 717 individuals ranging in age from 30~59 years were recruited in 18 community health centers of Shenzhen city from March 1 to June 15, 2015 by a cluster sampling method. The results of genotype of HPV, liquid-based cytology (LBC), colposcopy and pathology were analyzed. The clinical sensitivity and specificity as well as positive (PPV) and negative (NPV) predictive values of the combination of different HPV genotype in screening the cervical intraepithelial neoplasia (CIN) 2 and above were estimated.@*Results@#The HPV infection rate in Shenzhen area was 15.9% (432/2 717). The most common HPV genotype was HPV52 (22.9%), followed by HPV16 (12.7%), HPV53 (10.0%), HPV51 (8.6%) and HPV58 (8.1%). Compared with HPV16/18 genotyping, HPV33/16 genotyping had a higher sensitivity (57.1% vs. 42.9%, P<0.05) and an analogous specificity (87.3% vs. 86.9%, P>0.05) in predicting CIN2+ . The sensitivity of combination of HPV33/16 genotyping and low grade squamous intraepithelial lesion (LSIL) positive tested by LBC in predicting CIN2+ was 75.0%, significantly higher than 64.3% of atypical squamous cells of undetermined significance (ASC-US) positive tested by LBC alone (P<0.05). The specificities of these two methods mentioned above in predicting CIN2+ were 83.5% and 89.2%, respectively, without statistical difference (P>0.05).@*Conclusions@#Women infected by HPV have distinct risks for CIN2+ according to different high-risk HPV genotypes. The top five risks were HPV 33, 16, 58, 56, and 68. HPV-positive women triaged by LBC LSIL+ combined with HPV33/16 genotyping may be a potential strategy for cervical cancer screening in developed urban area.

Distribution and associated factors of high-risk HPV genotypes infection among HPV-positive women who participated cervical screening test in Shenzhen, 2014-2016, China / 中华预防医学杂志

Objective@#To analyze the distribution and associated factors of high-risk genotypes of HPV in cervical infection among women in Shenzhen.@*Methods@#The information on sociodemographic characteristics and HPV genotypes of HPV-positive women who participated cervical screening test from January 2014 to December 2016 was downloaded from Shenzhen Maternity and Child Healthcare Management Information System. According to the pathogenicity, the high-risk HPV genotypes were divided into 15 types including HPV 16, 18, 31, 33, 35, 39, 45, 51, 52, 53, 56, 58, 59, 66 and 68; and there were 6 low-risk genotypes including HPV 6, 11, 42, 43, 44, and 81. Chi-square tests were applied to compare the proportions of high-risk HPV infection among women who had different sociodemographic characteristics. A non-conditional logistic regression model was used to analyze the associated factors for high-risk HPV infection.@*Results@#In total, all HIV positives received HPV genotyping, with an average age of (38.08±9.38) years old. There were 9 979 (93.9%) high-risk and 645 (6.1%) low-risk HPV infections. The proportions of HPV infections for high-risk type in each year were 91.5%, 93.8%, and 95.6%, increasing with the screening years (χ2=54.79, P<0.001). Multivariate logistic regression analysis showed that compared with women younger than 25 years old, women in other age groups (at age 26 to 30 years, 31 to 35 years, 36 to 40 years, 41 to 45 years, and 50 years or older) had increased risks of high-risk HPV infection, with OR (95%CI) of 1.67 (1.20-2.31), 1.49 (1.09-2.03), 1.71 (1.23-2.37), 1.65 (1.19-2.31), and 1.84 (1.26-2.67), respectively; compared with the married, single women had a decreased risk of high-risk HPV infection (OR (95%CI): 0.71 (0.50-1.00)); women received HPV testing in 2015 and 2016 showed higher risk of high-risk HPV infection than those in 2014 (OR (95%CI): 1.43 (1.17-1.74) and 2.03 (1.68-2.46)). The 5 most common HPV genotypes were HPV52 (25.1%, 2 670 cases), followed by HPV16 (19.2%, 2 041 cases), HPV58 (13.3%, 1 413 cases), HPV18 (9.9%, 1 048 cases), and HPV51 (9.3%, 993 cases).@*Conclusion@#Age, marital status, and screening year were associated with high-risk HPV infections. Besides HPV16 and HPV18, the prevention and control on HPV infections for HPV52, HPV58, and HPV51 should be prioritized in Shenzhen area.