Auditory Perception ; Child ; Humans ; Sound Localization

Drug Resistance ; Hormones ; pharmacology ; Humans ; Membrane Proteins ; genetics ; Nephrotic Syndrome ; genetics

Objective To observe the change of mitochondrion membrane potential(??m) in apoptosis induced by an iron chelator(deferoxamine,DFO),and to explore the mechanism of this apoptosis in human leukemia-60(HL-60) cells.Methods HL-60 cells were co-cultivated with various concentration of DFO and FeCl_3 for certain time,resultingin status of intracellular iron deprivation and rich iron.Cell vital force was determinded by the MTT method.The cells were examined by phase contrast microscopy,flow cytometry(FCM) for evidence of apoptosis,and also by FCM for ??m.The transcription of the apoptogene of bax was detected by hybridization in situ.Results The cell growth rate assumed descent tendency.DFO could induce the apoptosis and descent ??m of HL-60 cells(P

Adult ; Humans ; Male ; Palate ; surgery ; Postoperative Complications ; Pulmonary Embolism ; etiology ; Snoring ; surgery ; Uvula ; surgery

Objective To evaluate the predictability of MSCT perfusion in the restorability of renal function of hydronephrotie kidneys with unilateral partial ureteric obstructed rabbit model as to explore a method to predict the restorability of renal function of hydronephrotic kidneys and to investigate the changes of MSCT perfusion parameters during the course of the restore of renal function.Methods Establish a unilateral partial ureteric obstructed rabbits hydronephrotie model.Hydronephrotie rabbits were grouped as control,2,4 and 8 week(G_2w,G_4w and G_8w)after obstruction and the later 3 groups of rabbits were reared for further 4 weeks after the obstruction was released.MSCT perfusion scanning was performed and the specimen was made into histological slices with HE staining.Results BF and BV value of renal cortex and medulla of G_2w after obstruction [(864?32)ml?100 g~(-1)?min~(-1),(19.5?0.9)ml/100 g (cortex ); (182.1?7.5)ml?100g~(-1)?min~(-1),(8.37?0.51)ml/100g(medulla)]was released restored in substance and approached that of control[(899?63)ml?100g~(-1)?min~(-1),(21.6 + 1.4)ml/100 g (cortex);(193.5?16.5 )ml?100g~(-1)?min~(-1),(8.50?0.54 )ml/100 g (medulla)]while there was no significant restore in that of G_4w and G_8w after obstruction[(525?15)ml?100g~(-1)?min~(-1),(12.8? 0.6)ml/100g (G_4 w);(512?10)ml?100g~(-1)?min~(-1),(9.4?1.0)ml/100 g (G_8w)] was released. Histologically,there was a positive correlation between the duration of obstruction and the seriousness of pathologic changes.Conclusion MSCT perfusion can provide information not only morphologically but also about renal perfusion of hydronephrotic kidneys.

The growth curve of single cell organisms in batch cultivation could divide into 6 phases, lag phase, acceleration phase, log phase, deceleration phase, stationary phase, and death phase, based on specific growth rate during cultivation process. There were significantly differences between deceleration phase and the other phases in cell growth, substrate consumption, product formation, and genes express profile. The deceleration phase was highly important to fermentation process. However, cognizing and teaching to the deceleration phase had been considerably weakened since a long period. So it should be strengthened.

This study was purposed to observe the changes of caspase-3 activity during apoptosis of HL-60 cells induced by an iron chelator, DFO (deferoxamine), and to explore the mechanism underlying apoptosis in HL-60 cells. The HL-60 cells treated with DFO were examined by light microscopy, flow cytometry (FCM) and DNA agarose gel electrophoresis; the activity of caspase-3 was determined by cellular immunohistochemistry; the transcription of the apoptotic gene of bax was detected by hybridization in situ. The results showed that the typical morphological character of apoptosis cells, DNA ladder and FCM assay confirmed that DFO could induce the apoptosis in HL-60 cells. The apoptotic rate increased in dose-and time-dependent manner. When cells had been cultivated with 100 micromol DFO for 12 hours, a few caspase-3 positive cells were found. In the process of time, the rate of caspase-3 positive cells was progressively higher than that in control (P < 0.05), while the level of bax transcription was also higher than that in the control. It is concluded the activation of caspase-3 and gene bax may be involved in the apoptosis of HL-60 cells induced by DFO.
Apoptosis ; drug effects ; Caspase 3 ; metabolism ; Deferoxamine ; pharmacology ; HL-60 Cells ; Humans ; bcl-2-Associated X Protein ; biosynthesis ; genetics

Adult ; Carcinoma, Neuroendocrine ; diagnosis ; pathology ; Ear Canal ; pathology ; Ear, Middle ; pathology ; Humans ; Male

Amphotericin B ; administration & dosage ; adverse effects ; Child ; Child, Preschool ; Drug Therapy, Combination ; Female ; Humans ; Male ; Meningitis, Cryptococcal ; diagnosis ; drug therapy

OBJECTIVETo explore the clinical features, diagnosis and treatment of pediatric myelodysplastic syndrome (MDS).

METHODSTwenty-eight children with MDS between January 2006 and March 2012 were enrolled in the study. Clinical symptoms, signs, laboratory examinations, treatment and outcomes were retrospectively studied.

RESULTSAnemia (96%), bleeding (68%), fever (68%) and hepatosplenomegaly (61%) were main clinical manifestaions in the 28 patients. Three cases (11%) converted into acute monocytic leukemia (M5), erythroleukemia (M6) or acute megakaryocytic leukemia (M7) one to two months later. Bone marrow proliferation mainly demonstrated as active or obviously active. One or two lineages of hematopoietic dysplasia were mostly observed in all 28 cases and obvious iron metabolism disorders were found in these patients. Cytogenetic abnormalities were detected in 45% of the 28 cases, most of which were numeral chromosome abnormalities. T cell, B cell and NK cell numbers decreased, Th cell numbers decreased, Ts cell numbers increased and Th /Ts inversed. Eight cases gave up treatment when confirmed. Of the 8 cases receiving symptomatic and supportive treatment alone, one was lost, one showed disease stability, and the remaining 6 cases showed disease progression. One patient who underwent induced differentiation and one who received hematopoietic therapy showed disease progression. Ten patients underwent chemotherapy. Two cases had no bone marrow remission after single agent chemotherapy. Of the 8 cases who underwent multi-drug combination chemotherapy, 4 cases achieved partial or complete remission of bone marrow.

CONCLUSIONSPediatric MDS is characterized by a lack of typical clinical manifestations, and a high rate of conversion to leukemia. Bone marrow proliferation is mainly active in children with MDS. One or two lineages of hematopoietic dysplasia is common. Among the cytogenetic abnormalities, numeral chromosome abnormalities are common. Obvious iron metabolism disorders and abnormal cellular immunity are found in children with MDS. Multi-drug combination chemotherapy appears to slow the course of the disease.

Adolescent ; Bone Marrow Examination ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; Myelodysplastic Syndromes ; blood ; classification ; diagnosis ; therapy