The efficacy of colorectal cancer treatment is not very satisfactory.Conventional morphologic imagings are limited in the diagnosis and in the applications of multimodality treatment for colorectal cancer.18 F-fluorodeoxyglucose PET-CT can play a pivotal role in detecting metabolism changes and in the localization of lesions concurrently.It is valuable in the assessment of responses to therapy,prediction of prognosis and selecting modality management and monitoring postoperative recurrence.The right-moment and proper application of PET-CT can increase the therapeutic efficacy of colorectal cancer.

Adolescent ; Child ; Female ; Humans ; Parotid Diseases ; pathology ; Parotid Gland ; pathology ; Recurrence

AIMTo study the effects and mechanism of naloxone on the febrile response in IL-1beta-induced fever rats.

METHODSThe fever model was established by intracerebroventricular injection of IL-1beta in rats. The effect of naloxone on the body temperature of feverrats was observed. The contents of cAMP in hypothalamus and AVP in VSA were detected.

RESULTSNaloxone alleviated IL-1beta-induced fever and the contents of cAMP in hypothalamus and AVP in VSA were correspondingly decreased (P < 0.01).

CONCLUSIONNaloxone could inhibit IL-1beta-induced fever in rats, and the mechanism might be due to inhibiting synthesis of cAMP in hypothalamus and promoting release of AVP in VSA.

Animals ; Arginine Vasopressin ; metabolism ; Cyclic AMP ; metabolism ; Fever ; metabolism ; Hypothalamus ; drug effects ; metabolism ; Male ; Naloxone ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Septum of Brain ; drug effects ; metabolism

Objective:To investigate the expression of hypoxia-inducible factor-2α (HIF-2α)in non-small cell lung cancer (NSCLC)tissue,and to analyze its relationships with angiogenesis,cell proliferation and chemotherapy resistance. Methods: Total 112 cases of NSCLC and 20 cases of normal lung tissues were selected, immunohistochemical method was used to detect the expressions of HIF-2α,CD31,Ki67 and GST-π in 112 cases of cancer tissue and 20 cases of normal lung tissue,and the correlations of HIF-2α expression with microvessel density (MVD),Ki67, and GST-π were analyzed.Results:The positive expression rate of HIF-2α in NSCLC tissue was significantly higher than that in normal lung tissue (P < 0.05 ), the expression rate of HIF-2α in 112 cases of NSCLC was 47.3% (53/112).The MVD in HIF-2α protein high expression NSCLC group (31.1 ± 14.7)was higher than that in HIF-2αprotein low expression NSCLC group (24.3±15.8)(P <0.05).The cases of high expression of Ki67 in HIF-2αhigh expression group occupied 54.7% (29/53),and it was higher than that in HIF-2αlow expression group (16/59,27.1%);there was significant difference (r = 0.281,P = 0.003).The high expression of HIF-2α had no obvious correlation with the expression of GST-π (r = 0.122,P = 0.202). Conclusion:HIF-2αmay play an important role in the carcinogenesis and development of NSCLC by promoting the angiogenesis and enhancing the cell proliferation of NSCLC,but it may have no correlation with chemotherapy resistance.

Objective To establish an simple and convenient animal model of cardiac arrest for studying cerebral resuscitation.Method Clean male Sprague Dawley rats were randomly divided into sham group and experimental group.Cardiac arrest was induced by asphyxiation and ice-cold 0.5 mol KCl with blood flow cut off for 5 minutes.Animals were resuscitated with external cardiopulmonary resuscitation (CPR),mechanical ventilation,and epinephrine injection.Blood pressure,heart rate,successful ratio of resuscitation after 72 hours, time of cardiac arrest (T_(CA)) and return of spontaneous circulation (T_(ROSC)) were recorded.Neural deficit scores (NDS) and levels of maleic dialdehyde (MDA) in plasma were evaluated at 3,6,12,24,48,72 hours after ROSC.The damage score of cortex was measured by transmission electron microscope examination at 3 hours and 72 hours after ROSC.Results All the rats in experimental group had cardiac arrest rapidly.T_(CA) and T_(ROSC) were (137.3?10.2) seconds and (64.4?9.3) seconds,respectively,while the successful rate of resuscitation was 82.5%.The lowest NDS was at 3 hours after ROSC,while the NDS increased gradually.After CPR,the level of MDA in plasma increased significantly,slightly declined at 72 hours after ROSC,but still significantly higher than before the model.Electron microscope examination of cortex showed neuron slightly,organelle and astrocyte,but became better after 72 hours post ROSC.Conclusions The model of cardiac arrest was easy to establish,and the data provided was accurate,which is useful to study the mechanism of cerebral resuscitation.

AIM: To investigate the early changes of retinal function in diabetic patients detected by multifocal electroretinogram (mfERG).METHODS: The first-order kernel responses of mfERG were recorded from eyes of 33 normal control subjects,63 diabetic patients without retinopathy and 43 diabetic patients with background retinopathy. The response densities and implicit times of N1 and P1 were compared among the control, diabetic patients without retinopathy and diabetic patients with retinopathy.RESULTS: The response densities of N1 and P1 in central 3 rings were reduced significantly in diabetic eyes with and without retinopathy. And the implicit times of N1 and P1 were delayed significantly only in diabetic eyes with retinopathy.CONCLUSION: mfERG can detect the early changes of retinal function quantitatively in diabetic patients. Analysis of response densities and implicit times of N1 and P1 can reflect the progress of local retinal dysfunction in diabetes.

Objective To evaluate the clinical effect of transcatheter closure with Amplatzer duct occluder offers in infants with patent ductus arteriosus(PDA).Methods Thirty-seven PDA infants underwent transcatheter closure of PDA at(8.7 ? 3.3)months and weight of(8.6 ? 3.5)kg.A lateral view aortogram was made to determine the morphology and the narrowest diameter of the ductus and selected the size of the device.Occluder was implanted using the anterograde venous approach.Follow-up evaluations were made with chest X-ray and echocardiogram at 24 hours and 1,6 and 12 months after implantation.Results The narrowest diameter of the ducts measured by angiographically was(3.3 ? 1.5)mm.Ninteen patients(54.29%) achieved immediate complete occlusion.On color Doppler the closure rates at 1 month after implant were 34 cases(97.14%).No residual shunt exsisted in all implanted patients at 6 and 12 months follow-up.Procedure time at(57 ? 43)minutes and fluoroscopy time(23.0?14.9)minutes.Conclusions Percutaneous PDA closure with the Amplatzer duct occluder decice is an safety and effective method for the treatment of PDA in infants,but caution shall be exercised to the anatomic characteristics in the infant age group in solving clinical complications.

BACKGROUND:Cyclin A2 is a key regulator of cellcycle. Location and expression of cyclin A2 in neonatal mouse myocardium is not clear.
OBJECTIVE:To observe the location and expression of cyclin A2 in neonatal mouse cardiomyocytes and its relationship with the exit of cardiomyocytes from cellcycle.
METHODS:Neonatal mice were kil ed to take myocardial tissues at 0, 3, 7, 14 and 28 days after birth. Western blot were used to detect the expression of cyclin A2, proliferating cellnucleus antigen and Phospho-histone H3. Immunohistochemitry detection was used to detect the location of cyclin A2 and expression of proliferation cellnucleus antigen at different time after birth.
RESULTS AND CONCLUSION:Western blot showed the decrease of cyclin A2 after birth til disappeared at day 4 (P=0.001). Cyclin A2 located mainly in the nucleus after birth and exported to the cytoplasm at day 14, and basical y disappeared at day 28. Proliferating cellnucleus antigen showed gradual y decreased tendency after birth. Mitosis specific marker, Phospho-histone H3, exhibited a gradual decrease after birth, which was consistent with cyclin A2 in expression intensity.

To study the protective mechanism of Danhong injection on brain microvascular endothelial cells (rBMECs) injured by hypoxic. In the experiment, primary suckling mouse's rBMECs cells were collected and identified with factor VIII to establish the 4 h injury model. Meanwhile, rBMECs were given Danhong injection (25, 50, 100 mL . L-1), and the superoxide dismutase (SOD) activity and the malonyldialdehyde (MDA) level were detected by the biochemical method. Cell MMP-9, ICAM-1 and P53 mRNA expression levels were detected by RT-PCR method. Changes in cells' microscopic structure were observed by transmission electron microscope. According to the results, primary rBMECs were notably injured by hypoxia. Compared with model group, Danhong injection (50, 100 mL . L-1) could remarkably resist the injury induced by hypoxic, increase intracellular SOD activity, decrease MDA level and significantly down-regulate ICAM-1, MMP-9 and P53 mRNA expressions. Danhong injection (100 mL . L-1) could protect the cells' normal morphology and microscopic structure, maintain the close intercellular junction, and inhibit the hypoxia-induced cell apoptosis. The results showed that Danhong injection plays a significant role in protecting rBMECs injured by hypoxia. Its mechanism may be related to the enhancement of cells' antioxidant capacity, the inhibition of inflammatory response and the cell apoptosis.
Animals ; Antioxidants ; metabolism ; Apoptosis ; drug effects ; Brain ; metabolism ; Cell Hypoxia ; drug effects ; Drugs, Chinese Herbal ; pharmacology ; Endothelial Cells ; ultrastructure ; Female ; Gene Expression Regulation ; drug effects ; Humans ; Injections ; Intercellular Adhesion Molecule-1 ; metabolism ; Male ; Malondialdehyde ; metabolism ; Matrix Metalloproteinase 9 ; genetics ; Protective Agents ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Superoxide Dismutase ; metabolism ; Tumor Suppressor Protein p53 ; genetics

To study the protective effect of combined administration of active ingredients of Danhong on cultured primary mice's brain microvascular endothelial cells (rBMECs) injured by hypoxia. Primary mice's brain micro-vascular endothelial cells were cultured to establish the 4 h hypoxia model. Meanwhile, active ingredients (protocatechuic aldehyde, salvianolic acid B, hydroxysafflor yellow A and tanshinol) of Danhong were administered in rBMECs. The non-toxic dosage was determined by MTT. The leakage of lactate dehydrogenase(LDH), cell superoxide dismutase (SOD) activity and MDA level were detected by the colorimetric method. The expressions of ICAM-1, MMP-9, P53 mRNA were detected by RT-PCR method. Changes in rBMECs cell cycle and early apoptosis were detected by flow cytometry. Danhong's active ingredients and prescriptions 1, 2, 3, 7, 8, 9 could be combined to significantly restrain LDH in hypoxic cells supernatant. Prescriptions 1, 2, 3, 7, 8, 9 could significantly enhance SOD activity in anoxic cells; Prescriptions 1, 2, 3, 8, 9 could significantly decrease the MDA level; Prescriptions 1, 2, 6, 7, 9 could significantly inhibit the early rB-MECs apoptosis induced by hypoxia. After hypoxia, the up-regulated P53 mRNA expression could cause retardation in G, phase and promote cell apoptosis. This proved that the regulatory function of P53 gene lay in monitoring of calibration points in G, phase. Prescriptions 1, 2, 5, 6, 7, 8, 9 could significantly down-regulate the P53 mRNA expression; Prescriptions 1, 4, 7, 8, 9 could significantly down-regulate the ICAM-1 mRNA expression; Prescriptions 1, 3, 6, 9 could significantly down-regulate the MMP-9 mRNA expression. The combined administration of Danhong's active ingredients showed a significant protective effect on primary cultured rBMECs injury induced by hypoxia Its mechanism may be related to the enhancement of cellular antioxidant capacity and the inhibition of inflammatory response and cell apoptosis. This study could provide ideas for researching prescription compatibility, and guide the clinical medication.
Animals ; Apoptosis ; drug effects ; Brain ; drug effects ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Endothelial Cells ; drug effects ; Hypoxia ; drug therapy ; Microvessels ; drug effects ; Rats ; Rats, Sprague-Dawley