ObjectiveTo study the multidrug resistance (MDR) produced by lung resistance protein gene (LRP) in HCC, and the relationship between LRP and prognosis of HCC patients. Methods The expression of LRP encoding LRP and mRNA lrp was examined in the cancer tissue of 54 cases of previously untreated HCC, cancer adjacent liver tissue and liver biopsy of posthepatitic cirrhosis in 12 cases. The relationship between the expression of LRP and the change of AFP level in 24 posthepatectomy HCC cases was observed after receiving postoperative adjuvant chemotherapy in which the AFP had been positive. Results The positive rate of LRP and mRNA lrp was 61%, 33%, 17%, and 76%, 38%,33% respectively in three corresponding tissues, with significant difference between untreated HCC and two other tissues (CMH=4 27,6 71; P

Objective To evaluate if 18F-FLT PET imaging could be used as a new clinical method to predict tumor radiosensitivity.Methods MDA-MB-231 and LN229 cells were irradiated with doses of 0,8 and 16 Gy of 6 MV photon energy,then soft agar assay and cellular uptake of 18F-FLT were performed on the 2 cell lines.The t test and one-way analysis of variance were used for the two groups and data before and after irradiation.The MDA-MB-231 and LN229 tumor xenografts were prepared by injecting the tumor cells into the right limbs of female BALB/c nu/nu mice.Once tumors reached a diameter of 10 mm,the two types of mice were divided randomly into 3 groups (20 mice per group) according to the irradiation doses (0,8 and 16 Gy).After irradiation,18F-FLT PET imaging and immunohistochemical staining were conducted.Then correlations between 18F-FLT SUVtumor/SUVmuscle ratio (T/M ratio) and TK1 labeling index percentages (LITK1) were tested using linear correlation analysis.Results The survival fraction of MDA-MB-231 and LN229 cells after irradiated with 8 Gy were (59.73 ± 4.3) ％ and (93.41 ± 3.75) ％,respectively (t =-13.20,P ＜ 0.001).When the dose increased to 16 Gy,the survival fraction decreased to (43.57 ±4.06) ％ and (81.77 ± 4.42) ％,respectively(t =-14.24,P ＜ 0.001).In MDA-MB-231 cells,the cellular uptake of 18F-FLT after irradiation with 8 Gy declined rapidly to (18.32 ± 1.38) kBq/105 cells ((128.22 ± 8.24) kBq/105 cells with the dose of 0 Gy,F =266.41,P ＜ 0.01),and maintained this low level till 72 h.For the LN229 cells,the cellular uptake decreased to (9.87 ± 1.30) kBq/105 cells after 8 Gy irradiation ((134.88 ± 6.59) kBq/105 cells with the dose of 0 Gy,F =346.06,P ＜ 0.01),then increased gradually to (127.17 ± 9.08) kBq/105 cells at 72 h (F =346.06,P ＞ 0.05).The dynamic changes of 18F-FLT cellular uptake in the two cells had the same pattern after being treated with 16 Gy irradiation.In the 18F-FLT PET image of MDA-MB-231 tumor mice after 8 Gy radiotherapy,the T/M ratio decreased to 0.78 ± 0.39 at the first day,but it was 2.84 ± 0.29 before radiotherapy (F =39.78,P ＜0.01).Then the ratio increased slowly,and it was still lower than the baseline at 7 d after radiation (F =39.78,P ＜0.01).The same pattern could be seen in the group of 16 Gy irradiation.In LN229 tumor mice treatment with 8 Gy irradiation,the T/M ratio increased to 2.41 ±0.47 at the first day,and it was 1.58 ±0.29 before radiotherapy (F =34.01,P ＜ 0.05).The ratio decreased steadily to 0.66 ± 0.32 (F =34.01,P＜0.05) at 7 d after radiotherapy.However,in the treatment group with 16 Gy,the T/M ratio decreased gradually and reached 0.44 ± 0.22 at 7 d (F =41.85,P ＜ 0.01).A correlation was found between 18F-FLT T/M ratio and LITK1 (8 Gy:r=0.67,0.73; 16 Gy:r=0.73,0.69; all P＜0.01) in both tumor models.Conclusion 18F-FLT PET imaging may be used as a new assay to predict tumor radiosensitivity,but further investigation is needed before clinical application.

Objective To obtain the matched parameters between image quality and radiation dose by exploring the influence of the exposure parameters of screening mammography on both the image quality and radiation dose.Methods The correlation between the exposure parameters and average glandular doses to 507 patients undergoing screening mammography were retrospectively analyzed.The influence of breast compression thickness on radiation dose by exposing different thickness of PMMA was obtained.The correlation with image quality was analyzed by combined testing of contrast detail test mode ( CDMAM3.4 )and different thickness of PMMAs.Results The groups aged 30 to 49 years were the main groups in 507examined patients,up to 67.06％ of the total.The mean value of average gland doses ( AGD ) in contrastprior mode was the highest in three kinds of exposure modes,accounting for 137.5％ of standard mode.In standard mode,target material/filtration board combination was Mo/Mo,Mo/Rh and Rh/Rh,accounting for 1/3 respectively.Mo/Rh and Rh/Rh were selected in dose-prior mode,accounting for 50％ respectively.Mo/Mo was mainly selected in contrast-prior,accounting for 52％.Breast compression thickness was positively correlated with average gland doses.Image quality figure inverse (IQFinv) under three kinds of modes (STD,DOSE,CNT) was 98.32,95.41 and 107.02,respectively,and IQFinv of contrast-prior mode was the highest among them.IQFinv was in general agreement in the three kinds of exposure modes when the thickness of PMMA plates plates was greater than or equal to 5 cm.Conclusions In clinical practice,when the breast is of density type and pressed thickness is less than 4 em,the dose-prior mode should be selected.When the pressed thickness is between 4 and 6 cm,the standard exposure mode should be selected.When the pressed thickness is larger than 6 cm,the manual mode should be selected.

Objective To study the expressions and significance of MRP and LRP in HCC. Methods The expressions of two genes were examined in three tissues (54 cases of HCC, 24 para cancer and 12 posthepatitis cirrhosis tissues) by SP immunohistochemical and PCR techniques. Results MRP and LRP were expressed in three tissues, with significantly higher rates in HCC than others (P

Objective To evaluated the role of postoperative radiotherapy (PR) after surgery in patients with uterine sarcoma,and analyzed the prognostic factors.Methods A total of 182 patients with uterine sarcoma were included between June 1994 and October 2014.Radiotherapy dose were 30-50 Gy/10-25 fractions/5 fractions/week.The LRFFS and OS were calculated with Kaplan-Meier method,and difference was analyzed with log-rank method.Cox regression analyses were used to determine prognosticators.Results There were 114 patients which survived more than 5-years in this whole group,including PR 24 cases and no PR 90 cases.The 5-year LRRFS and OS were 62.1％ and 56.2％,respectively.The 5-year LRRFS were 78.0％ and 55.3％ on PR and no PR (P=0.013);with OS 64.1％ and 51.7％ on PR and no PR (P=0.070).A multivariate analysis showed that pathological types,histological grade and clinical stage were associated with LRRFS and OS (P=0.032,0.008,0.000 and 0.046,0.000,0.000).PR was significant influencing factor for OS (P=0.013).Conclusions Uterine sarcoma patients treated with PR after surgery had an improved LRRFS compared to those treated with surgery,especially those with leiomyosarcoma.The role of PR personalized radiation for uterine sarcoma still needs to be further discussed.

BACKGROUND: Vascular endothelium growth factor (VEGF) is an endothelium mitogen and angiogenic factor with strong potential during recovery from cerebral infarction (CI). Can such therapeutic effect be detected with magnetic resonance diffusion imaging?OBJECTIVE: To study the therapeutic efficacy of VEGF plasmid in treating focal cerebral infarction in a dog experimental model with the aid of diffusion- and hemodynamic-weighted magnetic resonance imaging (MRI),with the morphological results compared with those of immunohistochemical examination.DESIGN: Completely randomized controlled, double blind evaluation,analysis of variance, Pearson correlation analysis, follow-up for 2 weeks.SETTING: Department of Medical Iconography, the Second Affiliated Hospital of Hebei Medical University.MATERIALS: This study was carried out at the Department of Medical Iconography, the Second Affiliated Hospital of Hebei Medical University,between April 2001 and March 2002. Totally 18 healthy adult dogs weighing 10-15 kg were randomly divided into control group and experiment group with half in each.METHODS: All dogs were subjected to femoral intubation and then made into CI model by the occlusion of middle cerebral artery with an embolus injected through the internal carotid artery. Dogs in control group were put to death at postoperative 24 hours, 1 week and 2 weeks with three at each time point, while four dogs in experiment group were put to death at postoperative 1 week and five at 2 weeks. Dogs in experiment group received microinjection of 0.5 mL fluid containing pcD2/hVEGF121 (500-600 μg)instantly after operation, which was replaced with physical saline of the same volume at the same time point in control group. Then they were subjected to MRI scanning once an hour for 4 times, with the sequence of T1WI, T2WI, 3D-TOFMRA, DWI and CET1WI, which was repeated at postoperative 24 hours, 3 days, 1 week and 2 weeks. Based on the MR images, pathological focuses were selected for morphological observation of cells with the aid of HE staining, and CD34 IHC staining was used for counting micrangium, as well as VEGF staining for VEGF positive cells.Then the apparent distribution coefficient (ADC) was calculated, and the differences between different time points and groups were analyzed by analysis of variance. The number of capillaries and VEGF positive cells of each high-power field was counted, with the results compared with those of MR scanning so as to explore the correlation between MR signal changes and IHC results.MAIN OUTCOME MEASURES: ① The number of capillaries and VEGF positive cells in each high-power field was counted at postoperative 24 hours, 1 week and 2 weeks; ② MR images of each group.RESULTS: Data of the 18 dogs entered the final analysis. ① Diffusionweighted imaging (DWI) showed higher signals at infarctional region at postoperative 1 hour, which became strengthened as time went by. ②ADC decreased to (5.61 ±1.39) mm2/s at postoperative 3-4 hours, about 43% lower than that of the opposite hemisphere [(9.85±2.04) mm2/s]. It resumed to (9.83±1.11) mm2/s, but was still lower than the normal level.③ The subsequent MR scanning proved that ADC ratio presented an increasing tendency in contrast with the decreasing tendency at super-acute stage. The increment was even more marked in control group and the difference was significant at postoperative 2 weeks (P=0.032, 0.006). ④ The number of capillary positive cells on the affected side in experiment group was significantly higher than that in control group at postoperative 2 weeks [(28.80±3.29)/field, (20.70±4.47)/field, (P ＜ 0.01)]. ⑤ The number of VEGF positive cells on the affected side in experiment group was significantly higher than that in control group at postoperative 1 and 2weeks [(64.20±9.40)/field, (51.90±5.74)/filed; (72.70±6.98)/filed,(58.40±6.35)/field, (P ＜ 0.01)].⑥ The results of MR scanning and IHC were subjected to correlation analysis and revealed that ADC ratio was closely correlated with the number of capillary positive cells, with Pearson correlation coefficient being 0.679 (P ＜ 0.01). Moreover, the number of capillaries and the number of VEGF positive cells were significantly correlated (r=0.668, P ＜ 0.01).CONCLUSION:Morphological observation and IHC revealed that both the local capillaries and VEGF protein content increased markedly in timedependant manner due to VEGF plasmid gene therapy.Meanwhile,the change of ADC ratio was found to be closely correlated with the number of VEGF positive cells and the number of capillaries.

Objective To investigate the radiation dose to phantoms of thick dense breasts (compression thickness ＞ 65 mm) and the influence of Molybdenum-Rhodium (Mo-Rh) and Wolfram Rhodium (W-Rh)) target-filter combination on image quality in full field digital mammography (FFDM).Methods An aluminium plate was placed on polymethyl methacrylate (PMMA) plates to simulate dense breasts.Two of 68 mm in-depth phantoms were used to simulate photography condition of thick dense breasts with 0.1 and 0.2 mm aluminium plates respectively.The two phantoms were exposed automatically,half-automatically and manually.The parameters were recorded for each exposure including the target-filter(T-F),tube voltage (kV),tube current (mAs),average glandular dose (AGD),entrance surface dose (ESD) and the image quality figure inverse (IQFInv).Pearson correlation and regression was used to analyze the influence of AGD on IQFInv.Paired sample t-test was used to analyze the influence of different target-filters on IQFInv and AGD.Results AGD had a positive correlation with IQFInv (r =0.806-0.953,P ＜ 0.05).For the phantom of 0.1 mm aluminium,when the tube current was fixed at 100 mAs or the tube voltage was fixed at 28 kVp,AGD and IQFInv had statistically significant difference for two target-filters(t =3.162-8.028,P ＜0.05).For the phantom with 0.2 mm aluminium,when the tube current was fixed at 100 mAs under different tube voltage,AGD and IQFInv had statistically significant difference for two target-filters(t =4.768-8.028,P ＜ 0.05);when tube voltage was fixed at 28 kVp under different tube current,AGD had statistically significant difference for two target-filters(t =7.730,P ＜ 0.05),while there was no statistical difference in IQFInv(P ＞ 0.05).In addition,when tube current was 100 mAs,IQFInv had statistically significant difference for two phantoms in W-Rh(t =2.345,P ＜ 0.05).Conclusions W-Rh target-filter combination can achieve lower radiation dose under the guarantee of the image quality compared with Mo-Rh target-filter combination.At the same tube current,W-Rh target-filter combination can provide a better image quality under a relatively high tube voltage.

Objective:To explore the interleukin-31 protein expression in the hypertrophic scar of incision tissue after surgery and its underlying pathological impact.Methods:From February 2022 to February 2023, three HS patients scar tissue (HS) and their normal skin tissue (Control, NS) were obtained. Two patients were female and one patient was male. The tissues were fixed in 4% formalin and embedded in paraffin. Haematoxylin-eosin (HE) stain and immunohistochemical stain were used to evaluate the epidermal thickness, myofibroblasts of dermis and the expression level of IL-31 between HS and NS.Results:The epidermis thickness was (303.88±46.03) μm in HS group, while (133.02±17.40) μm in NS group ( t=12.60, P<0.001). The expression level of IL-31 protein was measured by IRS score and positive cell density. The IRS score was 9.89±2.03 of the basal layer in HS group and was 4.33±1.66 of the basal layer in NS group. The positive cell density was 786 343.83±159 627.97 of the basal layer in HS group ( P<0.001) and was 555 457.61±128 097.21 of the basal layer in NS group ( P=0.014). In the dermis layer, the IRS score was 7.11±1.05 in HS group and was 4.33±0.71 in NS group, the positive cell density was 156 760.97±26 046.10 in HS group ( P<0.001) and was 49 576.01±52 369.33 in NS group ( P<0.001). In the dermis layer, the count of myofibroblasts was 120.44±15.75 in HS group while was 27.39±14.89 in NS group ( t=23.79, P<0.001). Conclusions:Our study demonstrates that both myofibroblast count and IL-31 protein expression level are notably increased in HS patients. The expression of IL-31 protein is prominent in the cytoplasm of myofibroblasts, basal cells, macrophages and mast cells which could implicate that IL-31 may be a potential therapeutic target to enhance the resolution of HS.

Objective To explore the methods and means to improve standardized management of regional quality control using quantitative indicators and information technology.Method The Quality Management and Control Indicators for Beijing health and medical institutions were converted into secondary and tertiary entries for quantitative scoring in accordance with the principles of standardization and management in the Integrated Management System of Health Examination under the regional information platform (Beijing Physical Examination Information Platform).APP was downloaded and applied in the on-site quality inspection.The data were obtained in paper forms completed on-site at 185 medical institutions with valid quality inspection scores in Beijing in 2014 and from the 2016 Beijing medical institutions' physical examination quality inspection.The inclusion criteria were as follows:185 institutions were divided into three groups (Level 3,Level 2,Level 1 and below),and each group was further divided into three subgroups with scores of 0-360,361-480,and 481-600;a total of 63 institutions were randomly selected from seven subgroups.Experts used the Integrated Management System of Health Examination Quality Control mobile app for the inspection.The two data groups were compared to check for quality improvement and the consistency of the quality inspection experts.Results The total quality score of medical institutions at Level 1 and below in 2016 (510.02±42.95) was higher than that in 2014 (483.16±79.06),and the difference was statistically significant (t=2.431,P＜0.05).There was no statistically significant difference between Level 2 and Level 3 medical institutions in 2014 and 2016.The scores of institutions at different levels are higher in the laboratory internal quality control and external quality assessment,and the difference was statistically significant (P＜0.05),whereas the score of physical health examination quality management organization only improved in the medical institutions at Level 1 and below,with statistically significant difference (P＜0.05).The changes of scores in the consistency of quality inspection experts was reduced after the application of the system,and the difference in institutions at Level 3 and Level 1 and below was statistically significant (P＜0.05),while not statistically significant in institutions at Level 2 (P=0.840).Conclusion Quantitative indicators and information technology are effective in regional standardized management of physical examination quality,and worthy of further exploration.

Objective:To prove the effect of double V-Y procedure for paramedian tubercles plasty in patients with thin lower lips and dissatisfied appearance of lower lips.Methods:From 2013 to 2019, 127 Chinese cases of thin and dissatisfied appearance of lower lips were included. A double V-Y procedure for paramedian tubercles plasty was performed. Objective data of lip morphology before and after operation were measured, and subjective satisfaction survey and long-term follow-up were conducted.Results:The midline lower red lip height, the height of paramedian tubercles of lower-lip and the protrusion of lower-lip were significantly higher than that before the operation. The time of apocatastasis, scar softening of incision, natural expression recovery and local numbness relief were evaluated by following up at 7 d, and 3-24 months after operation, and it showed 73.2% of subjective satisfaction. The time of detumescence was 6-32 (15.2±3.5) days; the time of incision scar softening was 2-10 (5.1±2.3) months; the time of expression recovery was 1-7 (3.1±0.9) months; the time of numbness disappearance was 5 d-2 years (158.2±82.6) days.Conclusions:The double V-Y advancement of vermilion mucosa flap procedure for paramedian tubercles plasty displays a significant effect in improving volume and shape of lower lips. It is recommended for further clinical application.