Child ; Histiocytosis, Sinus ; diagnosis ; drug therapy ; Humans ; Lymphatic Diseases ; diagnosis ; drug therapy ; Male

Objective To use tri-operator breast blood oxygen imaging in diagnosis of early stage breast cancer.Methods To analysis and diagnosis eighty cases with the technology of breast blood oxygen imaging.Results The accurate rate of the diagnosis made by technology of breast blood oxygen imaging was 93.75%,the sensitivity of diagnosis was 90.63%,the specificity was 95.83%.Conclusions The technology of breast blood oxygen imaging without the radiation may be a better methods to diagnosis the breast diseases,which has the higher sensitivity than infrared rays examination on breast cancer diagnosis.

OBJECTIVESTo study the relationship between lymphangiogenesis and lymphatic metastasis in mice bearing hepatic carcinoma and analyze the mechanism of the lymphatic metastasis.

METHODSHepatic carcinoma cell lines of high and low potentialities of lymphatic metastasis were injected into the footpads of Balb/c mice. Their metastases to lymph nodes were examined. The tumor tissues of each group were stained with 5'-nucleotidase-ALP to observe the lymphoangiogenesis. The total RNA of high and low metastatic potential cell lines were extracted for metastasis gene DNA array. The vascular endothelial cell growth factor C (VEGF-C) and VEGF-D of each cell line were detected using semi-quantitative RT-PCR and were further quantatively analyzed using real time PCR.

RESULTSThe para-common iliac a. and renal hilar lymph nodes metastases of the high metastatic potential cells were significantly higher than in the controls (P>0.05). The quantity of lymphatic vessels in the high metastasis group was significantly larger than that of the control group (P<0.05). The expressions of CD44, E-cadherin, HER2/neu, H-Ras and VEGF-C in the high metastasis group were higher than those in the low metastasis group shown by the cDNA micro array experiment but the expressions of nm23A, nm23-E4, p16ink4a, CD61 were lower. The VEGF-C expression was higher and the VEGF-D was lower in the high metastasis group compared to those of the low metastasis group shown by semi-quantitative RT-PCR. The secretion of VEGF-D was significantly lower and the ratio of VEGF-C/VEGF-D was significantly higher in the high metastasis group than the low metastasis group (P<0.05).

CONCLUSIONSThe lymphatic metastasis of hepatic carcinoma is related to lymphoangiogenesis. The changes of VEGF-C and VEGF-D expressions might be a cause influencing the lymphoangiogenesis. VEGF-C/VEGF-D might be an effective parameter in affecting lymphatic metastases.

Animals ; Liver Neoplasms, Experimental ; pathology ; Lymph Nodes ; pathology ; Lymphangiogenesis ; Lymphatic Metastasis ; Male ; Mice ; Mice, Inbred BALB C ; Neoplasm Transplantation ; Vascular Endothelial Growth Factor C ; metabolism ; Vascular Endothelial Growth Factor D ; metabolism

OBJECTIVEWe previously showed that introduction of a normal, neomycin-tagged human chromosome 8 reduced the metastatic capacity of C5F rat liver cancer cell line, which had high metastatic potential without affecting tumorigenicity, suggesting the presence of one or more metastasis suppressor genes encoded on human chromosome 8. We proceeded to define further the region harboring the metastasis suppressor gene(s) and to determine the random loss of human chromosome 8 by PCR amplification of sequence tag site (STS) markers.

METHODSThe national Center for Biotechnology Information (NCBI) databases were used as references of the relative genetic distances of the STS markers. C5F genomic DNA and A9/neo8 genomic DNA were used as negative and positive controls for chromosome 8 amplification, respectively. Genomic DNA was isolated and quantified from cultured hybrid clones (A9/C5F-1 and A9/C5F-2 microcell hybrid clones served as metastasis-unsuppressed groups; A9/C5F-4, A9/C5F-8 and A9/C5F-10 microcell hybrid clones served as metastasis suppressed groups). STS-PCR products were separated by electrophoresis through 2% agarose gel.

RESULTSMetastasis-suppressed microcell hybrid clones (A9/C5F-4, A9/C5F-8 and A9/C5F-10) conserved STS markers between D8S542 --> D8S1973 (8p21.1-23.1). In contrast, metastasis-unsuppressed clones (A9/C5F-1 and A9/C5F-2) lacked several markers in this region. In attempts to refine the region retained in the microcell suppressed clones, more densely spaced STS markers in the human chromosome 8p21.1-23.1 were used. We found that the metastasis-suppressed clones retained 18cM region between D8S542 and D8S1973 (8P21.1-23.1), where as the metastasis-unsuppressed clones lacked the region.

CONCLUSIONOur results suggest that a metastasis suppressor gene is located within the interval between D8S542 and D8S1973 on human chromosome 8p21.1-23.1.

Carcinoma, Hepatocellular ; genetics ; Cell Line ; Cell Line, Tumor ; Chromosome Mapping ; Chromosomes, Human, Pair 8 ; genetics ; Fibroblasts ; cytology ; Genes, Tumor Suppressor ; Humans ; In Situ Hybridization, Fluorescence ; Liver Neoplasms ; genetics ; Neoplasm Metastasis ; Sequence Tagged Sites

OBJECTIVETo study the tumor cell killing function of T lymphocytes stimulated by dendritic cells (DC) and to analyze the differences of protein contents of exosomes in each type of cell.

METHODSThe exosomes of hepatic cell lines with high (P group) or low (F group) metastatic potentials were isolated by a process of four-step centrifugation and the collected exosomes were observed under an electron microscope (EM). The tumor cell killing experiment was performed by adding T lymphocytes activated by DC loaded with exosomes from corresponding P and F group cells and was studied using 3H-TdR experiments. The proteomic analysis was performed by surface-enhanced laser desorption/ ionization time of flight mass spectrometry (SELDI-TOF-MS ) on the exosomes of P and F group cells.

RESULTSThe density distribution and content of exosomes in the P group were not equal to those in the F group observed by EM. The CD80, CD86, MHC-I and MHC-II in the P group were 64.27+5.00, 44.89+10.11, 84.35+19.89 and 59.03+19.37, and those in the F group were 71.53+4.85, 50.01+9.50, 80.68+29.87 and 58.86+21.11, respectively (P>0.05, compared with the control group). The counts per minute value in the P group was 528.40+179.06 and 78.80+24.44 in the F group after being loaded with exosomes (P<0.01, compared with the control group). There were significant differences between the proteins in the exosomes of hepatic cancer cell lines with high or low metastatic potentials.

CONCLUSIONExosomes have potential values of application in immunotherapy and in biotherapy for recurrences and metastases of hepatic carcinomas.

Animals ; Carcinoma, Hepatocellular ; metabolism ; pathology ; Cell Line, Tumor ; Dendritic Cells ; immunology ; metabolism ; Exosomes ; Liver Neoplasms ; metabolism ; pathology ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred BALB C ; T-Lymphocytes ; immunology ; metabolism

OBJECTIVETo investigate the effectiveness of reconstruction of immunological functions of T cells on the degree of metastases of mouse hepatocarcinoma and the mechanisms of their functioning.

METHODSThe T cell model of immunological functions in Balb/c nu/nu mice was established and the effectiveness of the model was evaluated. The mice were divided into 4 groups. The immunological functions of T cells in experiment groups of Balb/c nu/nu mice were reconstructed. Metastases of the cancer in lymph nodes in each group were examined histologically. The formation time and growth rate of the tumors were calculated. The expression of MHCI and II of the tumor cell line and the difference of expression of immune associated gene were detected by Th1-Th2-Th3 gene array.

RESULTSThe ratio of CD3, CD4, CD8 and CD4/CD8 in the reconstructed group was higher than that in the control group. The average formation time was 7.7+/-0.6 days in Balb/c nu/nu mice and 11.5+/-1.3 days in Balb/c mice. The extent of metastases of the experiment group was lower than that of the control group (P < 0.05). The expression of MHCI of the high metastasis cell line was lower than that of the low metastasis cell line (P < 0.05). The expressions of Th1/Th2 associated genes in lymphocytes of high metastasis mice were lower than those of the low metastasis mice.

CONCLUSIONReconstruction of the immunological function of T cells can influence the metastasis of mouse hepatocarcinoma. The alteration of MHC molecule and low expression of Th1/Th2 correlated genes in lymphocytes may be a factor influencing the metastasis of liver cancer.

Animals ; CD4-CD8 Ratio ; Carcinoma, Hepatocellular ; immunology ; pathology ; Liver Neoplasms ; immunology ; pathology ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Neoplasm Transplantation ; T-Lymphocytes ; immunology ; Th1 Cells ; immunology ; Th2 Cells ; immunology ; Tumor Cells, Cultured

OBJECTIVESTo study the relationship between the expression level of DLC-1 mRNA (located in 8p) and the invasion/metastasis of human hepatocellular carcinoma (HCC).

METHODSFifty-one surgical specimens of human HCC were divided into high-invasive and low invasive groups according to their clinicopathological features. DLC-1 mRNA expression was studied in the 51 HCC specimens as well as 5 different metastasis potential cell lines using real-time quantitative PCR (RQ-PCR).

RESULTSThe expression level of DLC-1 mRNA in HCC specimens with high invasiveness was significantly lower than that with low invasiveness (P < 0.05). The expression levels of DLC-1 mRNA were significantly different between non-metastatic (Hep3B and HepG2) and metastatic (MHCC97-H, MHCC97-L and HCCLM3) cell lines (P < 0.05). From MHCC97-L to HCCLM3, with an increase of invasiveness and metastatic potentials, the expression level of DLC-1 decreased correspondingly, and its expression level in HCCLM3 was significantly lower than that in MHCC97-L (P < 0.01).

CONCLUSIONThe expression of DLC-1 mRNA may play an important role in inhibiting the invasiveness and metastasis of HCC.

Carcinoma, Hepatocellular ; metabolism ; pathology ; Cell Line, Tumor ; GTPase-Activating Proteins ; Gene Expression Regulation, Neoplastic ; Humans ; Liver Neoplasms ; metabolism ; pathology ; Mutagenesis, Site-Directed ; Neoplasm Metastasis ; Neoplasm Recurrence, Local ; RNA, Messenger ; biosynthesis ; genetics ; Tumor Suppressor Proteins ; biosynthesis ; genetics

Iron-doped titanium dioxide nanosheets was prepared by hydrothermal method using tetrabutyl titanate (C16H36O4Ti) and iron trifluoride (FeF3) and modified on ITO electrode.ITO/Fe : TiO2/CdS photoelectrochemical sensor was fabricated by successive ionic layer absorption and reaction(SILAR) method for determination of copper ion.The band gap of electode material was narrowed by iron doped TiO2 nanosheets,which made its absorption red-shifted and its response range of light was magnified.Based on the sensitization effect of CdS,the absorption and utilization of visible light of sensor was significantly enhanced and the photoelectric signal was amplified via reducing the recombination of electrons and holes.The sensor displayed excellent analytical performance for detection of copper ion with linear range of 0.2-4.0 μmol/L and 4.0-80.0 μmol/L and with the detection limit of 85 nmol/L.The sensor was used to detect copper ion in tap water,drinking water and Yongjiang river water with recoveries ranging from 94% to 111%.

Objective To analyze epidemic characteristics of COVID-19 epidemic in Qingpu District of Shanghai and provide evidence for prevention and control of COVID-19. Methods The COVID-19 cases diagnosed in the medical facilities in Qingpu District were included in the study.Descriptive epidemiology was employed to describe diagnosis, clinical symptoms and possible exposure. Results There were 53 suspected cases identified in Qingpu District, 47 of which were excluded and 6 were confirmed.Two confirmed cases were identified when seeking medical treatment and 4 by other means.Of the confirmed cases, 83.3% were male and 66.7% were imported.Their initial symptom was mainly cough.The 75.0% of the confirmed cases had underlying diseases.By PCR testing of SARS-CoV-2, 100.0% of the sputum specimens tested positive, 50.0% of the nasopharyngeal swabs were positive, whereas 100.0% of the throat swabs were negative. Conclusion COVID-19 is more common in men than in women.The positive rate of SARS-CoV-2 in sputum samples is highest, followed by nasopharyngeal swabs and throat swabs.It is crucial to implement the countermeasures at earlier stages, such as strengthening the road entrance monitoring, at-home or intensive health observation of foreign visitors for early identification of suspected COVID-19 cases.

OBJECTIVETo evaluate the learning curve of complete mesocolic excision(CME) for colon cancer.

METHODSClinical data of 75 cases in whom CME was performed by a group of surgeons in the Department of Gastrointestinal Surgery, Peking University People's Hospital from November 2009 to June 2011 were reviewed. The patients were divided into three groups(groups A, B, C, 25 cases in each group) by operative chronologic sequence.

RESULTSThere were no significant differences in age, sex, preoperative staging, cancer location, operation history of abdomen, ASA among the three groups(P>0.05). The operative time in group A was (205.4 ± 53.2) min and decreased to (180.4 ± 29.7) min in group B and (169.8 ± 41.3) min in group C (P<0.05). The postoperative hospital stay decreased from (17.8 ± 10.9) d in group A to(12.9 ± 4.1) d in group B and(11.0 ± 3.5) d in group C(P<0.05). The postoperative complication rate decreased from 32%(8/25) in group A and 36%(9/25) to 8%(2/25) in group C. The specimen quality was superior in group C compared to group A (WEST grade C above were 20 and 11 respectively, P<0.05). There were no significant differences in intraoperative bleeding, time to first flatus, postoperative fasting time, number of retrieved lymph nodes among the three groups(P>0.05).

CONCLUSIONFrom the learning curve of CME, surgeons can learn CME skill after performing 25 cases.

Adult ; Aged ; Aged, 80 and over ; Colectomy ; education ; methods ; Colonic Neoplasms ; surgery ; Female ; Humans ; Learning Curve ; Male ; Mesocolon ; surgery ; Middle Aged ; Retrospective Studies ; Young Adult