Adult ; Benzene ; poisoning ; Humans ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive ; chemically induced ; diagnosis ; Male ; Occupational Diseases ; diagnosis ; Physical Examination

Adult ; Heat Stroke ; diagnosis ; Humans ; Male ; Middle Aged ; Occupational Diseases ; diagnosis

Apoptosis ; Apoptosis Regulatory Proteins ; genetics ; Genetic Vectors ; Humans ; K562 Cells ; Transfection

Adolescent ; Ammonia ; poisoning ; Female ; Humans

Tumor growth depends on the tumor microenvironment(TME).Tumor-associated neutrophils(TANs)are important inflammatory cells in TME.TANs are divided intoN1type with anti-tumor effect andN2type of tumor-promoting effect.Therefore,TANs have both beneficial and harmful aspects of the body.A large number of studies have been shown that TANs affect tumor formation,metastasis,angiogenesis and immune response,regulated by the secretion of cytokines and chemokines.This review will summarize the biological characteristics of TANs,and tumor development,prognosis and treatment of tumor as well as research progress of the relationship between TANs and tumor.

AIM To investigate the protective effects and mechanism of propofol on cultured rat hippocampal neurons subjected to anoxia injury METHODS Hippocampal neurons of neonatal rats, which had been cultured in vitro for 10 days, were allocated to control groups and propofol treating groups In propofol treated groups,the culture medium were loaded with propofol at the concentrations of 3, 6, 12, 24, 48 mg?L -1 respectively, and then the neurons were exposed to oxygen glucose deprivation for 24 h, to 40 ?mol?L -1 H 2O 2 for 24 h or to 100 ?mol?L -1 glutamate for 50 min The cell survival rate in each group was evaluated by MTT colorimetry. Using a laser scanning confocal microscope (LSCM), the effects of propofol on neuronal calcium overload and on the reduction of mitochondrial membrane potential (△?m) evoked by anoxia were observed with fluo 3 and rhodamine 123 for real time changes of [Ca 2+ ] i and △?m. The electron spin resonance (ESR) was used to measure the scavenging effects of propofol on hydroxyl radical and superoxide anion RESULTS Propofol at the concentrations of 6～48 mg?L -1 attenuated the anoxic injury ( P

Objective To explore the effect of preoperative chemotherapy for children with malignant extragonadial germinoma. Methods Twenty patients with malignant extrogonadal germinoma had been treated with preoperative chemotherapy from Mar.2003 to Mar.2007.Protocol 1 of chemotherapy was to improve PEB:(cisplatin plus etoposide plus bleomycin A5);Protocol 2 was VAC(vincristine plus actinomycin D plus cyclophosphamide) the average time span of the chemotherapy was 16 weeks.Upon completion of chemotherapy,tumor resection was performed.The content of alpha fetoprotein(AFP) was determined before operation and compared with the content before chemotherapy.Re-gular follow-up procedure was taken after operation. Results All 20 patients received chemotherapy and underwent operation.The removal rate of resection operation was 100%,the process of operation was smooth.The volume of tumors in 14 patients decreased over 50% compared with those before chemotherapy.The response rate was 70%.The content of AFP decreased significantly in 15 patients(75%).Fifteen patients had been living without tumor for up to 2 years,for 5 cases the survival time went beyond 5 years. Conclusions Malignant extrogonadal ger-minoma in children grow infiltratively,bring detrimental effects to neighboring organs,and bring obstacles to resection operation.Chemotherapy for children with malignant extragonadal germinoma before operation can reduce volume of tumor and bleeding during operation,raise the resectability rate and lower the content of AFP.It will enhance the effectiveness of operation and improve prognosis.Therefore,it can be used as a conventional clinical method.

Objective To study the influence of high-fluoride on thyroid function and brain damage. Methods Thirty-six Wistar rats were randondy divided, according to weight and gender into 3 groups(12 rats each), i.e. control group, high fluoride group, and high fluoride plus thyroid tablet treatment group. The rats were fed with normal tap water containing no more than 5 mg/L NaF and the tap water added 100,100 mg/L NaF, respectively. After 7 months of experiment, the rats in high fluoride plus thyroid tablet treatment group were given with 0.04% thyroid tablet( 1.8 ml·kg~(-1)·d~(-1)) by gastric perfusion for three weeks. The contents of TT_3 and TT_4 in serum were detected by radio-immunological assay; the histomorphology in thyroids and brains were observed under microscopy; and the protein level of NMDAR2B subunit of glutamate receptor in the hippocampal CA1 and CA3 was measured by immunohistochemistry. Results As compared to the values of TT_3 and TT_4 in serum of rats in control group[ (0.97 ± 0.15), (84.03 ± 12.45)nmol/L], TT_3 and TT_4 in high fluoride group were obviously lower [(0.24 ± 0.07), (15.16 ± 2.08)nmol/L, all P < 0.01]; while no changes in TT_3 and TT_4 were detected in high fluoride plus thyroid tablet treatment group[ (1.02 ± 0.19), (85.63 ± 9.55)nmol/L, all P < 0.05] as compared to controls, but higher than those in high fluoride group(all P < 0.01 ). The pathological changes including partial hyperplasy, arrangement disorder, atrophy, and decreased colloid of the thyroid follicular epithelial cells in high fluoride group were observed under microscopy. In high fluoride plus thyroid tablet treatment group, the degree of the thyroid cellular hyperplasy was relatively slight as compared to high fluoride group. The swelling and disarrangement of neurons in the hippocampus were observed in high fluoride group, whereas the changes of the neurons were not so obvious in high fluoride plus thyroid tablet treatment group. The grey values of NMDAR2B positive cells in the hippocampal CA1 and CA3 in high fluoride group(167.05 ± 7.31 ) were significantly increased as compared to controls (92.53 ± 9.67 ) or high fluoride plus thyroid tablet treatment group( 101.66 ± 12.21, all P < 0.01 ). Conclusions High fluoride can induce the decreased function and changed histomorphology in thyroid and result in pathological damages in the brains of rats. However, treated with thyroid tablet to those having damages induced by high fluoride, the thyroid function and morphology can be normal, and the brain damages can be alleviated. The results indicate that hypothyroidism caused by high fluoride might be an important participating factor in brain damages caused by fluorosis.

The tumor microenvironment plays a vital role in the process of tumorigenesis and development.Studies have been confirmed that the tumor microenvironment heterogeneity has a huge impact on the tumor efficacy and drug resistance.This review summarizes the relationship between immune cells and related immune factors in tumor microenvironment as well as vascular endothelial cell heterogeneity and tumor progression and prognosis.So it is better help us understand the tumor microenvironment heterogeneity for the impact of the tumor.This will conduce to us through a variety of methods to enhance the body's anti-tunor ability by inhibi-ting and killing tumor cells.

Background Acute stress can provoke the apoptosis of retina cells and induce increasing expression of calcitonin gene related peptide(CGRP)in retina.However,the role of CGRP in pathology of the stressinduced apoptosis of the retina ceils is still elusive.Objective The aim of this study was to investigate the effects of endogenous CGRP on retinal cell apoptosis induced by stress of acute myocardial ischemia after coronary artery occlusion in rats. Methods The acute myocardial ischemia model was established by ligating the left anterior descending branch of coronary artery in 12 male Sprague-Dawley rats.The rats were randomized into CGRP8-37 injection group and normal saline injection group,6 rats 12 eyes for every group.CGRP8-37(10-7 mol/L),a specific antagonist of CGRP receptor,was intravenously injected in CGRP8-37 group by caudal vine at 15 minutes prior to the coronary artery occlusion,and the equivalent amount of normal saline was used at the same fashion in normal saline group.The retinal samples of the rats were collected at 3 hours after coronary artery occlusion for TUNEL staining and caspase-3 activity detection respectively. Results The cellular displacement was observed in inner and outer nuclear layer,and vacuolar degeneration of retinal ganglion cells was found in the coronary artery occlusion animals.The total apoptosis index of retinal cells in CGRP8-37 group was significantly higher than that in normal saline group (42.8％±2.8％ vs 37.5％±2.9％,t=-3.244,P<0.01).The retinal capase-3 activity was significantly enhanced in the CGRP8-37 group compared with saline group(11.3±3.1 fold vs 4.9±1.2 fold,t=-4.603,P<0.01)at 3 hours of coronary artery occlusion.Conclusion The results suggest that the endogenous CGRP may play an anti-apoptotic role in the stress.induced retinal cell injury.