Atrophy ; Brain ; pathology ; Child ; Female ; Humans ; Muscle Fibers, Slow-Twitch ; pathology ; Neuromuscular Diseases ; congenital ; pathology

OBJECTIVETo explore the coincidence of lipid peroxidation and neurobehavioral function changes in coke oven workers.

METHODSOne hundred and thirty-four coke oven workers were divided into three groups: 35 in the oven-bottom group, 49 in the oven-side group and 50 in oven-top group. WHO recommended NCTB was performed on coke oven workers and 36 controls from material conservation department; The contents of total superoxide dismutases (T-SOD), glutathione (GSH) and malondialdehyde (MDA) in blood were determined by test kits.

RESULTSCompared with the controls, the coke oven workers showed lower levels of T-SOD and GSH (P < 0.01), significantly higher MDA levels in blood (P < 0.01), higher score on negative mood state, lower scores on positive mood state, and poorer performance in NCTB test (P < 0.05). Further analysis revealed that there was a weak positive correlation between neurobehavioral function changes and the level of lipid peroxidation with a coefficient lower than 0.25.

CONCLUSIONThe level of lipid peroxidation in coke oven workers' blood increased and coincided with neurobehavioral function impairment.

Adult ; Affect ; Anxiety ; Case-Control Studies ; Coke ; Fatigue ; Glutathione ; blood ; Humans ; Lipid Peroxidation ; Male ; Malondialdehyde ; blood ; Middle Aged ; Occupational Exposure ; adverse effects ; Superoxide Dismutase ; blood ; Young Adult

OBJECTIVETo study the effects of benzo[a]pyrene (B[a]P) on capability of learning and memory and the content of amino acid neurotransmitters in hippocampus of rats.

METHODSThirty-two healthy, male SD rats were randomly divided into 4 groups according to their weights after intubated into ventricles: the solvent control group, 2.5, 5.0 and 10.0 mmol/L groups. 10 microl of B[a]P olive oil solutions, of different concentrations 2.5, 5.0 and 10.0 mmol/L, were injected into rats' lateral ventricles, respectively. Rats in the solvent control group were injected into the same volume of olive oil as that in B[a]P group. Rats' capability of learning and memory was tested by Morris water maze. The content of amino acid neurotransmitters in rats' hippocampus were determined by high performance liquid chromatogram with a fluorescence detector.

RESULTSCompared with the controls, the performances of learning and memory of rats decreased significantly in B[a]P treated groups (P<0.01). Levels of glutamate (Glu) were lower significantly in treated groups than that in controls (P<0.01). No significant differences were found in contents of aspartic acid (Asp), glycine (Gly) and aminobutyric acid (GABA) among the four groups.

CONCLUSIONB[a]P can damage rats' spatial learning and memory, and which could be related to decreased contents of excitatory amino acids in hippocampus.

Amino Acids ; metabolism ; Animals ; Benzo(a)pyrene ; toxicity ; Hippocampus ; drug effects ; metabolism ; Male ; Maze Learning ; drug effects ; Memory ; drug effects ; Neurotransmitter Agents ; metabolism ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo study the relationship between polymorphism of aryl hydrocarbon receptor (AhR) gene in G1661A and the level of urinary 1-hydroxypyrene among coke oven workers.

METHODS295 male subjects were studied, including 214 workers working in coke oven plant and 81 controls working in raw material plant who were not generally exposed to polycyclic aromatic hydrocarbons occupationally. General in-formation of subjects were collected in a specific questionnaire including age, smoking and drinking habits, the history of occupation and so on. The AhR genotypes were detected by allele specific amplification (ASA), and the levels of urinary 1-hydroxypyrene were measured by high performance liquid chromatography with a fluorescence detector.

RESULTSThe frequencies of G/G, G/A and A/A genotype were 52.8% (113/214), 27.6% (59/214) and 19.6% (42/214) in exposed group and 67.9% (55/81), 19.8% (16/81) and 12.3% (10/81) in control group, respectively. No significant difference was found in three genotypes between the exposed and control group. Allele frequencies of G and A were 66.6% (285/428) and 33.4% (143/428) in exposed group and 77.8% (126/162) and 22.2% (36/162) in control group, and no statistical differences were found in allele frequency between exposed and control group. After the length of service and external exposure orders in general linear model were adjusted, results of covariance analysis showed that logarithmic transformed urinary 1-hydroxypyrene levels were (3.62 +/- 0.12), (3.43 +/- 0.12) and (3.44 +/- 0.08) micromol/mol Cr in individuals with A/A, G/A and G/G, respectively. The logarithmic transformed urinary 1-hydroxypyrene levels were (3.24 +/- 0.09) and (3.43 +/- 0.10) micromol/mol Cr in individuals with allele of G and A. No statistical differences were found in level of 1-hydroxypyrene among A/A, G/A and G/G genotype individuals, and between allele G and allele A after external exposure orders and length of service were adjusted.

CONCLUSIONThe polymorphism of aryl hydrocarbon receptor G1661A has no significant impact on levels of urinary 1-hydroxypyrene.

Adult ; Coke ; Genotype ; Humans ; Male ; Middle Aged ; Polymorphism, Genetic ; Pyrenes ; pharmacokinetics ; Receptors, Aryl Hydrocarbon ; genetics ; Urine ; chemistry

OBJECTIVETo investigate the clinical and computed tomography (CT) appearances of pulmonary mucosa-associated lymphoid tissue (MALT) lymphoma.

METHODSThe CT findings and clinical data of 13 patients with pathologically proven pulmonary MALT lymphoma were retrospectively reviewed.

RESULTSAmong these 13 patients, seven presented no notable abnormalities, six manifested respiratory symptoms including cough, expectoration, and dyspnea; one of these six patients experienced fever. Chest CT showed solitary nodule in 2 patients and multiple nodules in 3 patients; meanwhile, it showed solitary consolidation in 3 patients and multiple consolidations in 5 patients. Other CT findings included air bronchogram (n = 13), airway dilatation (n = 4), ground glass opacities (n = 5), and interstitial changes (n = 5). One patient had mediastinal lymphoadenopathy and 2 had pleural effusion. Pathology showed massive lymphocyte infiltration; cells with notable nuclear atypia were also seen, which were generated from B cells.

CONCLUSIONSThe main CT findings of pulmonary MALT lymphoma include nodules, mass or patchy consolidations with air brochogram; hilar and mediastinal lymphadenopathies are rare. Clinical diagnosis should also be based on pathological findings and immunohistochemical results.

Adult ; Aged ; Female ; Humans ; Lung Neoplasms ; diagnosis ; diagnostic imaging ; pathology ; Lymphoma, B-Cell, Marginal Zone ; diagnosis ; diagnostic imaging ; pathology ; Male ; Middle Aged ; Radiography ; Retrospective Studies

Based on the characteristics of medical imaging specialty, this paper introduces in detail several features of standardized residency training in the Department of Radiology in our hospital, from the aspects of teaching purpose, preliminary preparation and specific implementation, namely, the morning reading and analysis of difficult cases, the analysis of postoperative cases and missed diagnosis cases, and the teaching reading. At the same time, it also deeply analyzes the advantages, existing problems and solutions of this teaching practice. In order to provide reference for improving the teaching quality of the standardized residency training in the Department of Radiology.

OBJECTIVETo study the expression and prognostic significance of galectin-1 and galectin-3 in different melanocytic lesions.

METHODSThe expression of galectin-1 and galectin-3 in 39 cases of benign nevus, 58 cases of primary cutaneous melanoma, 24 cases of primary mucosal melanoma, 69 cases of melanoma with lymph node metastasis and 8 cases of melanoma with distant metastasis were studied by immunohistochemistry and tissue microarray.

RESULTSThe expression of galectin-1 and galectin-3 was higher in benign nevi than in melanomas (P < 0.01). The nuclear expression of galectin-3 was higher in primary cutaneous melanomas than in primary mucosal melanomas or melanomas with metastases (P < 0.01, respectively). The expression correlated with age of patients (P < 0.05), necrosis (P < 0.05) and survival time (P < 0.01). Clark's level also correlated with survival time in patients with cutaneous melanomas (P = 0.037). TNM staging was the only independent prognostic factor for melanomas (P < 0.01).

CONCLUSIONSThe expression of galectin-1 and galectin-3 is decreased in melanomas. The decrease in nuclear expression of galectin-3 may represent a poor prognostic factor for melanomas. TNM staging is an independent prognostic factor which influences the survival time.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Female ; Galectin 1 ; metabolism ; Galectin 3 ; metabolism ; Humans ; Immunohistochemistry ; Liver Neoplasms ; secondary ; Lung Neoplasms ; secondary ; Lymphatic Metastasis ; Male ; Melanoma ; metabolism ; pathology ; secondary ; Middle Aged ; Nasal Mucosa ; metabolism ; Neoplasm Staging ; Nevus ; metabolism ; pathology ; Skin Neoplasms ; metabolism ; pathology ; Survival Rate ; Young Adult

OBJECTIVETo evaluate efficacy and safety of second-generation tyrosine kinase inhibitors (TKI) dasatinib, nilotinib and imatinib in treatment of newly diagnosed patients with chronic-phase chronic myeloid leukemia (CML).

METHODSThe clinical data and follow-up results of 163 patients with chronic-phase chronic myeloid lenkemia(CP-CML) who were treated in our hospital during the nearly 3 years were analysed retrospectively, among 163 patients 47 received dasatinib, 43 received nilotinib and 73 received imatinib. The efficacy, disease progression and safety were evaluated.

RESULTSAfter treatment for 3 months, the rate of complete hematologic response(CHR) in three treatment groups were 77%, 79% and 67%, respectivily, CHR at 12 months in three treatment groups were 92%, 91% and 90%, respectively. By 3 months, the rates of complete cytogenetic response(CCyR) with dasatinib and nilotinib were higher than that with imatinib (55%, 53% vs 33%)(P<0.05 for both comparisons), CCyR at 12 months in three treatment groups were 86%, 88% vs 69% (P<0.05 for both comparisons). The rates of major molecular response(MMR) for dasatinib (11%) and nilotinib (9%) by 3 months were significantly higher than that for imatinib (1%) (P<0.05 for both comparisons), MMR at 12 months in three treatment groups were 49%, 50% and 28%, respectively (P<0.05 for both comparison). Progression to the accelerated or blast phase of CML occurred in 2 (4%) patients received dasatinib, 2 (5%) received nilotinib and 6 (8%) received imatinib. The safety profiles of these 3 second-generation TKI treatments were similar.

CONCLUSIONBoth dasatinib and nilotinib induced strikingly higher and faster rates of complete cytogenetic response and major molecular response, with a statistically significant difference from imatinib.

Antineoplastic Combined Chemotherapy Protocols ; Blast Crisis ; Dasatinib ; Disease Progression ; Humans ; Imatinib Mesylate ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive ; Protein Kinase Inhibitors ; Pyrimidines ; Retrospective Studies ; Treatment Outcome

OBJECTIVE: To investigate the effect of a water-soluble novel dihydroartemisinin dimer containing nitrogen atoms SM 1044 on the apoptosis of all-trans retinoic acid (ATRA) resistant acute promyelocytic leukemia (APL) NB4-R1 cells and its potential mechanism. METHODS: The effects of SM 1044 on cell apoptosis, mitochondrial transmembrane potential, and the level of reactive oxygen species (ROS) were assessed by flow cytometry. Expressions of apoptosis-related proteins were determined by Western blot. The effects of SM 1044 on MAPK (ERK, JNK) signaling pathway, PML/RARα fusion protein, and expressions of apoptosis-related proteins were detected by Western blot. RESULTS: SM 1044 could significantly induce apoptosis and the loss of mitochondrial transmembrane potential in NB4-R1 cells, and activate apoptosis-related proteins caspase-3, caspase-8, caspase-9 and poly (ADP-ribose) polymerase (PARP). SM 1044 could also induce NB4-R1 cells to produce ROS. Western blot showed that SM 1044 activated the phosphorylation of MAPK (ERK, JNK) signaling pathway and down-regulated the expression of PML/RARα fusion protein. CONCLUSION SM 1044 can induce apoptosis of ATRA resistant APL NB4-R1 cells, which may be related to ROS/ERK and ROS/JNK signaling pathway, and can also induce by down-regulating PML/RARα fusion protein.
Humans ; Reactive Oxygen Species/pharmacology* ; Tretinoin/pharmacology* ; Leukemia, Promyelocytic, Acute ; Cell Line ; Apoptosis ; Oncogene Proteins, Fusion ; Cell Differentiation

OBJECTIVE: To investigate the effect of chidamide on the killing activity of NK (Natural killer cell, NK) cells targeting K562 cells and its related mechanism. METHODS: K562 cells were pretreated with chidamide at different concentrations and cocultured with NK cells at different effect-target ratios. The killing effect of chidamide on K562 cells by NK cells, the expression of natural killer group 2 member D (NKG2D) ligands and apoptosis rate of K562 cells were detected by flow cytometry. RESULTS: The killing sensitivity of NK cells to K562 cells could be enhanced by chidamide. The expression of ULBP2 on K562 cell surface could be up-regulate, however, the expression of ULBP1 and MICA/MICB showed no statistically difference as compared with control group. Chidamide showed no obvious cytotoxicity to K562 cells. CONCLUSION Chidamide can significantly improve killing efficiency of NK cells on K562 cells, which may be related to the up-regulation of ULBP2 expression.
Aminopyridines ; Benzamides ; GPI-Linked Proteins ; Histocompatibility Antigens Class I ; Humans ; Intercellular Signaling Peptides and Proteins ; K562 Cells ; Killer Cells, Natural ; immunology ; NK Cell Lectin-Like Receptor Subfamily K