Objective:This work aims to use the characteristics of dendritic cells (DCs) pulsed with recombinant human HSP70, which can present and process tumor antigens, to enhance the killing activity of cytotoxic t lymphocytes (CTLs) against breast neoplasms. Methods:Autologous DCs were isolated from peripheral blood mononuclear cells and then stimulated in vitro with granulocyte macrophage-colony stimulating factor and interleukin-4. The DCs were loaded with A549 tumor cell freeze-thaw lysate, and rhHSP70 was added as an immune adjuvant. The specific groups were subjected to tumor-specific cytotoxic assay, enzyme-linked immunosorbent assay, and fluores-cence-activated cell sorting. Results:DCs pulsed with A549 tumor cell lysate enhanced the growth expansion of CTLs, upregulated CD40 and CD80 populations in CTLs, and augmented Th1 cytokines. In addition, the cytotoxicity of specific CTLs against A549 was highly enhanced. The above indications became more obvious after the addition of rhHSP70. Conclusion:DCs pulsed with freeze-thaw cell lysates derived from breast cancer can enhance growth expansion of lymphocytes. They may serve as an effective tumor antigen to stimulate the proliferation of specific CTLs, which are very effective in activating specific T-cell responses against breast cancer cells in vitro. The improved anti-tumor immunity response by DC-based vaccines may be related to the maturation of the DCs promoted by rhHSP70.

Objective To make use of the characteristics of presenting and processing tumor antigen of Dendritic cells pulsed with recombinant human Hsp70 and Mage-3 peptide to enhance killing capability of breast neoplasms. Methods Autologous dendritic cells were isolated from PBMC and then stimuiated in vitro with GM-CSF and IL-4.Dendritic cells were loaded with Mage-3 peptide;at the same time Hsp70L1 was added. The specific groupings each induce generation of tumor specific cytotoxic assay with ELISA. Results DCs pulsed with Mage-3 peptide enhanced the growth expansion of CTL, and promoted the secretion of cytokines such as TNF-αand IL-6. DCs pulsed with recombinant human Hsp70 and Mage-3 peptide had cytotoxicity against human breast cancer cells MCF-7.Conclusions DCs pulsed with recombinant human Hsp70 and Mage -3 peptide have higher biological activities. Modified DCs can stimulate the proliferation of lymphoeytes,present effectively tumor antigen to stimulate generation of speeific CTLs. Dendritic cells pulsed with recombinant human Hsp70 and Mage-3 peptide have high ability to kill breast cancer cells.

Purpose:To explore the problems in the treatment of elderly patients suffering from lung cancer. Methods:58 cases of elderly patients aged over 70 who received operation for lung cancer during Oct. 1997 to Aug. 2002 were analyzed retrospectively.Results:56 cases underwent resections (resection rate 96.6%), of which 48 cases (82.8%) had radical resection and 8 cases (13.8%) palliative resection.2 cases (3.4%) had exploratory surgery. Postoperative complications were found in 50 cases (86.2%), of which 2 cases died during perioperation period(mortality rate 3.4%). Conclusions:Old age is not the major determining factor when considering surgical operation as the treatment for lung cancer patients. In order to enhance resection rates especially radical resection rate and survival rate, to diminish postoperative complications and mortality, and thus to improve the quality of life for the elderly lung cancer patients, a series of measures must be taken. First, diagnosis and treatment of the associated condition must be emphasized. Second, full preoperative preparations with appropriate choice of the time and procedure for operation. Finally, intensive monitoring during the preoperative period and prevention and treatment of postoperative complications are also important factors to be considered.

Objective To study the relationship between the reexpression of nestin protein and the expression of basic fibroblast growth factor (bFGF) protein in cerebral ischemia. Methods By using rat permanent cerebral ischemia as a model, immunohistochemical staining was used to observe the expression of nestin protein and the bFGF protein 1,3,7,14 and 28 days after cerebral ischemia. Results The number of nestin cells around the ischemic area increased 1 to 3 days after cerebral ischemia,but it decreased 7 days after cerebral ischemia. However, the number of bFGF cells around the ischemic area increased obviously 14 days after cerebral ischemia, but it decreased 28 days after cerebral ischemia. Conclusion Reexpression of nestin protein around ischemic cerebral tissues does not need the nourishment and susteinance of bFGF protein; nestin cells around ischemic foci are originated from astrocytes which replay the course of fetation.

Objective To investigate the clinical significance of nuclear factor ( NF)-κB activation in peripheral blood mononuclear cells (PBMCs) and the serum levels of correlated inflammatory cytokines in children with infant muggy syndrome(IMS).Methods Blood samples from 100 patients with IMS and those from 32 healthy infants( control group)were detected by ELISA for amount of NF-κB activation in PBMCs and for serum levels of interleukin ( IL ) -17,IL-6,tumor necrosis factor ( TNF ) -α and IL- 10 respectively from Jan 2008 to Jan 2011.At the same time,blood samples from 46 out of the above 100 patients with IMS and those from the 32 controls for positive rate of activation of NF-κB in PBMCs were detected by flow cytometry as well.The relationship between all the data and multiple organ dysfunction syndrome( MODS ) were analyzed respectively.Results As compared with that of control group,the percentage of activated NF-κB in PBMCs in 100 patients with IMS detected by ELISA [ ( 11.042 ± 6.792 ) ％ vs ( 4.528 ± 1.378 ) ％ ] and the positive rate of NF-κB activation in 46 patients with IMS detected by flow cytometry [ ( 28.780 ± 13.820 ) ％ vs (7.078 ±5.395)％ ] were both significantly higher ( P ＜0.01 ).The serum levels of IL-17,IL-6 and IL-10were also significantly higher in patients with IMS than those in control group( P ＜0.01 ).The serum level of TNF-α was higher in patients with IMS than that in control group but without significance( P ＞ 0.05 ).The percentage of activated NF-κB [ ( 14.591 ± 7.626) ％ vs ( 8.576 ± 4.851 ) ％ ],the positive rate of NF-κB activation [ ( 36.087 ± 12.056) ％ vs ( 23.590 ± 11.263 ) ％ ],and the serum levels of IL- 17,IL-6,TNF-α and IL-10 were all significantly higher in IMS patients with MODS than those in IMS patients without MODS ( P ＜ 0.01 ).Conclusion The inflammatory factors of NF-κB activation in PBMCs and the high serum levels of IL-17 and IL-6 are potent to cause inflammatory damage in IMS patients,and the serum level of IL-10 is not able to compensate the damage.The activation of NF-κB and high serum levels of IL-17,IL-6 and TNF-α are correlated with MODS.

Objective: To investigate the detection of HIV/AIDS cases in medical institutions in Tianjin Municipality from 2005 to 2021, so as to provide insights into optimization of HIV antibody testing strategies in medical institutions. Methods: All data pertaining to individuals receiving HIV antibody tests in medical institutions in Tianjin Municipality from 2005 to 2021 were collected from the information systems in medical institutions and the HIV/AIDS Prevention and Control Information System of Chinese Disease Prevention and Control Information System. The positive rate of HIV antibody and epidemiological characteristics of HIV/AIDS cases in medical institutions were analyzed. Results: The number of HIV antibody tests increased from 86 102 person-times in 2005 to 1 369 345 person-times in 2021 in medical institutions in Tianjin Municipality, with annual increase by 18.88%. The positive rate of HIV antibody increased from 2.44/104 to 2.85/104 (P<0.05), with annual increase by 2.79/104. Both the proportion of the number of HIV antibody tests and the number of HIV/AIDS cases detected by medical institutions in the whole city appeared a tendency towards a rise (P<0.05). A high positive rate of HIV antibody was seen in sexually transmitted disease clinics (53.69/104) and other testing services (12.25/104), and the highest positive rate of HIV antibody was seen in individuals at ages of 20 to 39 years (5.40/104), while the positive rate of HIV antibody was higher in men (5.84/104) than in women (0.53/104) (P<0.05). A total of 3 610 HIV/AIDS cases were detected in medical institutions in Tianjin Municipality from 2005 to 2021, with a median age of 38 (interquartile range, 24) years. Of all HIV/AIDS patients, there were 3 277 men (90.78%), and men who have sex with men was the predominant transmission route (63.46%), while the proportion of late identification of HIV/AIDS cases was 65.60%. In addition, the proportion of timely detection for the first CD4+T lymphocyte count testing increased from 23.81% in 2005 to 71.54% in 2021 (P<0.05). Conclusions The number of HIV antibody tests and positive rate of HIV antibody appeared a tendency towards a rise in medical institutions in Tianjin Municipality from 2005 to 2021. The HIV/AIDS cases were predominantly identified in sexually transmitted disease clinics and other testing services, and were predominantly men.

Objective To investigate the distribution of high pathogenicity island(HPI)in multiple-drug-resistance gram-negative bacilli and analyze the protein sequence.Methods To amplify thefyuA-irp2 gene cluster of the 84 isolates by multiple polymerase chain reaction(PCR),the product was subsequently sequenced.Results The positive rate ofirpl,irp2,irp3,irp4 and fyuA was 40.48％,41,67％,5.95％,O％and 16.67％,respectively.Theamino sequence offyuA comefromEC06748,Kp7151 and PAE7 was usedto compare with AL590842,there are 100％identities.Amino sequence ofirp2 come from Kp49 and Kp51 have 99％identities with AAA27636.1,but amino sequence of irp2 come from EC04 and EC07 only have 90％identities with 1176840.The GenBank accession number is FJ211852 and FJ211851.Amino sequence ofirpl come fromKp 10,Kp49 and Kp51 have 99％identities with AL590842。and amino sequence ofirp3 come from EC03,Kp51,Kp10 and Kp49 have 97％identities with CAA73128.There are the same mutation among the same species,and different mutation among different species.Conclusion There was different extant mutant lost in thefy～t-i,v2 gene cluster in multiple-drug-resistanee gram-negative bacilli.

Objective: To learn the toxicity of Dendrobium officinale flowers to pregnant rats ( P, F1 ) and offspring rats ( F1, F2 ) before birth, so as to provide toxicological evidence for the safety assessment. Methods : The rats were divided into four groups with 20 female rats and 10 male each. The rats in three dose groups were fed with Dendrobium officinale flowers at the dose of 2.0, 4.0, 6.4g/kgbw. After two generation, the F1a and F2a rats were fed with basal diet; F1b and F2b rats were fed with Dendrobium officinale flowers. The body weights and total weight gains during the gestation, the conception rates, the pregnancy rates, the birth weights and survival rates of offspring rats were examined. Results: There were no statistically significant differences in the body weights and total weight gains during the gestation, the conception rates, and the pregnancy rates in pregnant rats ( P, F1 ) among the four groups ( P>0.05 ). There were also no statistically significant differences in the survival rates and live birth rates in offspring rats (F1, F2) between the dose groups and the control group ( P>0.05 ). Conclusions Dendrobium officinale flowers did not show obviously adverse effects on pregnant rats ( P, F1 ) and offspring rats ( F1, F2 ) before birth.

Objective: To explore the cause and type of pigmentation in the livers and kidneys of rats caused by a compound Chinese medicine preparation. Methods: The experiment consist of low, medium, and high dose groups and a control group, the Sprague-Dawley rats in these groups were orally given 1.0, 2.0 and 4.0 g/kgbw of a compound Chinese medicine preparation of gardenia and distilled water for 30 days, respectively. The body weight, diet, hematology and histopathology of the rats in each group were observed for changes in pigment metabolism. Results: In the first and second weeks of the experiment, the rats in the low, medium, high dose groups and the control group showed no abnormal symptoms or signs. From the third weekend, the urine of the rats in the high dose group turned thick yellow and green, and the stool color became light. During the experiment, no rats died. There were statistically significant differences in body weights and weight gains among these groups ( P<0.05 ) . There were statistically significant differences in total food utilization, direct bilirubin, r-glutamyl transferase, alkaline phosphatase, and liver/body ratios among these groups ( P<0.05 ). Gross examination revealed that the livers and kidneys of rats in the high dose group were dull and green. Microscopic examination revealed changes in dark pigment particles in the livers and kidneys of rats in the high dose group. Histochemical staining confirmed that pigments in the livers and kidneys were bile pigments. Conclusions At a dosage of 4.0 g/kgbw, a compound Chinese medicine preparation of gardenia can lead to bile pigment deposition in the livers and kidneys of rats due to cholestasis.

Objective: To learn the effects of Dendrobium officinale flowers on testivular tissue morphology and sperm quality in parent and offspring rats,so as to provide reference for safety evaluation of Dendrobium officinale flowers. Methods: The 40 SD rats was randomly divided into the low-,middle-,high-dose and the control group,given 2.0,4.0,6.4 and 0 g/kgbw Dendrobium officinale flowers,respectively. After three months,the body weight,mass and organ/body coefficients of testis and epididymis of parent （P） and offspring （F1,F2） rats were measured;the number,activity and deformity of sperms were observed under microscope;the changes of testis and epididymis were observed by hematoxylin eosin staining. Results: There were no significantly statistical differences in the body weight,mass and organ/body coefficients of testis and epididymis,sperm quantity,sperm motility rate among four groups of P、F1、F2 male rats （P>0.05）. There were no significantly statistical differences in sperm malformation rate between the high-dose group and the control group （P>0.05）. There was no significant change in testis and epididymis of P,F1 and F2 male rats. Conclusion Dendrobium officinale flowers did not show obviously adverse effects on testivular tissue morphology and sperm quality in parent and offsping rats.