Adolescent ; Adult ; Aged ; Aged, 80 and over ; Drugs, Chinese Herbal ; administration & dosage ; therapeutic use ; Female ; Follow-Up Studies ; Humans ; Injections, Epidural ; Intervertebral Disc Displacement ; complications ; drug therapy ; physiopathology ; prevention & control ; Low Back Pain ; complications ; drug therapy ; Lumbar Vertebrae ; injuries ; Male ; Middle Aged ; Pharmaceutical Preparations ; administration & dosage ; Recovery of Function ; Recurrence ; Time Factors ; Treatment Outcome

In this study we determined whether or not 5-hydroxytryptamine (5-HT) has an effect on the pacemaker activities of interstitial cells of Cajal (ICC) from the mouse small intestine. The actions of 5-HT on pacemaker activities were investigated using a whole-cell patch-clamp technique, intracellular Ca2+ ([Ca2+]i) analysis, and RT-PCR in ICC. Exogenously-treated 5-HT showed tonic inward currents on pacemaker currents in ICC under the voltage-clamp mode in a dose-dependent manner. Based on RT-PCR results, we found the existence of 5-HT2B, 3, 4, and 7 receptors in ICC. However, SDZ 205557 (a 5-HT4 receptor antagonist), SB 269970 (a 5-HT7 receptor antagonist), 3-tropanylindole - 3 - carboxylate methiodide (3-TCM; a 5-HT3 antagonist) blocked the 5-HT-induced action on pacemaker activity, but not SB 204741 (a 5-HT2B receptor antagonist). Based on [Ca2+]i analysis, we found that 5-HT increased the intensity of [Ca2+]i. The treatment of PD 98059 or JNK II inhibitor blocked the 5-HT-induced action on pacemaker activity of ICC, but not SB 203580. In summary, these results suggest that 5-HT can modulate pacemaker activity through 5-HT3, 4, and 7 receptors via [Ca2+]i mobilization and regulation of mitogen-activated protein kinases.
Animals ; Flavonoids ; Gastrointestinal Motility ; Imidazoles ; Interstitial Cells of Cajal ; Intestine, Small ; Mice ; Mitogen-Activated Protein Kinases ; para-Aminobenzoates ; Patch-Clamp Techniques ; Phenols ; Pyridines ; Receptor, Serotonin, 5-HT2B ; Receptors, Serotonin ; Receptors, Serotonin, 5-HT4 ; Serotonin ; Sulfonamides

Child ; Humans ; Chromosomes, Human, Pair 16 ; Leukemia, Myeloid, Acute ; Neoplasms, Multiple Primary/genetics* ; Oncogene Proteins, Fusion/genetics* ; RNA-Binding Protein FUS/genetics* ; Sarcoma, Myeloid/genetics* ; Transcriptional Regulator ERG/genetics* ; Translocation, Genetic

OBJECTIVE: To investigate the effects of 1,2-dichloroethane( 1,2-DCE) on myelin basic protein( MBP),neuron specific enolase( NSE) and S100 protein in the plasma of SD rats. METHODS: Forty-eight specific pathogen free adult SD rats were randomly divided into control group,low-dose group and high-dose group,with 8 females and 8 males in each group. Rats were given 1,2-DCE orally at the dose of 0,27 and 79 mg / kg body weight every other day( every Wednesday,Monday and Friday) for 4 weeks. After 1,2-DCE administration,8 survived rats( half male and female) were randomly selected in each group. The plasma levels of MBP,NSE and S100 protein were measured using enzyme-linked immunosorbent assay. The blood and urinary samples were collected to assess the concentration of 1,2-DCE and its main metabolites( 2-chlorideacetic acid, 2-chlorideacetaldehyde and 2-chlorideethanol) by gas chromatography. The pathological changes of cerebrum and cerebellum were observed through optical microscope,and the expression of MBP was detected by immunohistochemistry. RESULTS: Rats in high-dose group showed abnormal behavior from the third day of1,2-DCE exposure and 6 rats( 2 females,4 males) died from 1,2-DCE intoxication. Rats in low-dose group and control group appeared normal and no death was observed. MBP level in the plasma of high-dose group was higher than that in the control group( P < 0. 05),but the levels of NSE and S100 protein in each group did not show significant statisticaldifference( P > 0. 05). 1,2-DCE and 2-chloroethanol in the urine were detected in the high-dose group,and were below detection limit in the other two groups. 2-Chloroacetic acid level in high dose-group was significantly higher than that in the low-dose group( P < 0. 05),and was below detection limit in the control group. 2-Chloroacetaldehyde in the urine of each group was below detection limit. 1,2-DCE and its 3 kinds of metabolites were not detected in the plasma of all rats. There was no obvious structural damage,bleeding,edema or necrosis found in the cortex and white matter of cerebrum and cerebellum. The expression of MBP in the choroid plexus epithelial cells were significantly enhanced in the lateral ventricle and the fourth ventricle of rats in the high-dose group,and slight enhanced in rats in the low-dose group. CONCLUSION: MBP may play a role in the toxic effect of 1,2-DCE.