Objective To investigate the characteristics of children′s recurrent abdominal pain(RAP) with gastroscopy and analyze the etiology.Methods Three hundred and thirteen children were investigated with gastroscopy.Gastric antrum mucosa was taken for histo-pathology and the determination of helicobacter pylori(Hp) antibody.Results Ninty-nine point six eight percent of the cases had lesions under the gastroscope.The former 4 cases had chronic superficial gastritis(CSG),CGS and bile reflux,CGS and duodenitis,CGS and bulb ulcer,and Hp infection rate was 31.36%,25%,38.64%,60.61%.Hp infection rates of active gastritis and inactive gastritis were 92% and 23.19%,which showed significant differences in 2 groups(P

Child, Preschool ; Humans ; Male ; Nevus, Blue ; pathology ; Skin Neoplasms ; pathology

Background Inherited retinal degeneration,one of the major causes of blindness worldwide,comprises a large number of disorders characterized by a slow and progressive retinal degeneration.Interleukin-1 (IL-1)was recognized to be involved in inherited retinal degeneration.Whether IL-1 receptor antagonist (IL-1ra) can arrest retinal degeneration is worthy of investigation.Objective This study was to investigate the effects of IL-1ra on photoreceptor apoptosis in Royal College of Surgeons (RCS) rats.Methods The use of the animals complied with the Regulations for the Administration of Affairs Concerning Experimental Animals by State Science and Technology Commission.The SPF RCS rats aged 9,15,16,25,30,35,40,50 and 60 postnatal days were collected,with 9 rats for each age group.Retinal sections were used for the TdT-mediated biotin-dUTP nick-end labeling (TUNEL) cell apoptosis assay.1 μl of IL-1ra (1.8 g/L) was intravitreally injected in the right eyes of 9 RCS rats aged 15 postnatal days and PBS was used in the same way in the fellow eyes.The injection procedure was repeated on the 20 th and 25 th day,respectively.The rats were sacrificed on the 30 th day and retinal sections were prepared for the TUNEL assay.The differences in the percentage of the positive cellular nuclei area among different ages of rats were compared by one-way ANOVA,and the differences in retinal layer thickness between IL-1ra injection group and PBS injection group were assessed by paired t test.Results Photoreceptor apoptosis appeared in 20-day-old RCS rats and progressed and peaked in 30 and 35-day-old rats and then reduced,showing a significant difference among rat of various age groups (F=28.020,P＜0.01).Images from TUNEL assay showed a weaker and less TUNEL staining in the IL-1ra injected eyes than the PBS injected eyes in 30-day-old rats.The total area and relative area of TUNEL positive nuclei were (223.052±153.092) μm2 and (2.206±1.531) ％ in the IL-1ra injected group,and those in PBS injected group were (1235.050±359.767) μm2 and (7.269± 1.624) ％,with a significant difference between them (t =4.370,t=3.250,P＜0.01).The cone and rod thickness was (15.324±9.035) μm in the IL-1ra injected group and (49.566±4.605)μm in the PBS injected group,showing a significant difference (t =22.674,P＜0.01).However,no significant difference was seen in the outer nuclear layer thickness between the two groups (t =0.268,P＞0.05).Conclusions IL-1 participates in the pathogenesis and development of inherited retinal degeneration of RCS rats.The use of IL-1ra might be a potential approach in the treatment of inherited retinal degeneration.

AIM: To evaluate the safety of the laser peripheral iridoplasty ( LPIP ) for the early-stage chronic primary angle-closure glaucoma ( ECPACG) .
METHODS:Sixty-five eyes of 36 patients with ECPACG received LPIP. At preoperative and postoperative, patients were examined with intraocular pressure ( IOP ) , anterior chamber, optical coherence tomography ( OCT) , visual acuity, visual field, fundus and complications. The mean follow-up was 18. 2±6. 7mo (ranged 12~24mo).
RESULTS: The preoperative average IOP were 23. 8±5.6mmHg, postoperative 1wk, 1, 3, 6, 12mo and in the last follow-up time the average IOP were 18. 7±3. 8, 17. 9±3. 2, 17. 6±3. 5, 18. 4±3. 7, 18. 6±3. 7, and 18. 6±7. 8mmHg. There was statistical difference comparing with preoperative (P<0. 05, decreasing average 6. 5±3. 1mmHg compared with the preoperative, the difference was statistically significant (t=5. 32, P<0. 05). Postoperative 1wk, 1, 3, 6mo, the trabecular-iris angle ( TIA500 ) and the angle opening distance at 500μm ( AOD500 ) had the statistical difference comparing with preoperative ( P <0.05). At Postoperative 1a and the last follow-up time, the TIA500 and AOD500 did not have statistical difference comparing with preoperative (P>0. 05). The postoperative visual acuity, visual field, fundus had not changed. There were no complications found.
CONCLUSION:LPIP is safe, and has the short time effect in the treatment of ECPACG. With elapse of time, the effect of LPIP is weakened. We can repeat the treatment.

OBJECTIVETo determine the possible difference in vasodialtation effect of quercetin and rutin.

METHODSThe isolated rat thoracic aorta was treated with phenylephrine (PE), and the effects of quercetin and rutin on the preconstricted aorta rings with or without endothelium were determined by organ bath technique. Nitric oxide synthase inhibitor L-N(G)-nitroarginine methyl-ester (L-NAME), guanylyl cyclase inhibitor methylene blue, cyclooxygenase inhibitor indomethacin were used to explore the mechanism.

RESULTSQuercetin (10-160 micromol/L) caused vasorelaxation of aorta rings preconstricted with PE in endothelium-intact and denuded aorta rings in a dose-dependent manner. Rutin(10-160 micromol/L) caused dose-dependent vasorelaxation in endothelium-intact rings preconstricted with phenylephrine, but not in denuded aorta rings. The maximal response (Rmax) values calculated from vasorelaxation curves of quercetin and rutin were (77.20+/-6.11)% and (44.28+/-7.48)%, respectively. There was no difference between median effective concentration (EC(50)) values of quercetin and rutin. Pretreatment with L-NAME (0.1 mmol/L) abolished the vasorelaxation by rutin,but did not influence the vasodilating effect of quercetin in endothelium-intact rings. Pretreatment with methylene blue (10 mmol/L) canceled the vasorelaxation both by quercetin and rutin. Pretreatment with indomethacin (10 micromol/L) attenuated the vasodilatation of quercetin, but did not affect the vascular effect of rutin.

CONCLUSIONThe vasodilatation effect of quercetin is more potent than rutin. The vasodilatation effect of quercetin might be mediated by guanylyl cyclase and cyclooxygenase-dependent pathway, while the vasodilatation by rutin might be via nitric oxide-guanylyl cyclase pathway.

Animals ; Aorta, Thoracic ; drug effects ; Dose-Response Relationship, Drug ; Guanylate Cyclase ; metabolism ; In Vitro Techniques ; Male ; Nitric Oxide ; metabolism ; Phenylephrine ; pharmacology ; Prostaglandin-Endoperoxide Synthases ; metabolism ; Quercetin ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Rutin ; pharmacology ; Vasodilator Agents ; pharmacology

OBJECTIVEWith the development of endoscopic therapy in children, endoscopic electrocoagulation polypectomy had gradually replaced surgery and became an important method to resect gastrointestinal polyps in children. Simple electrocoagulation polypectomy could often bring some complications of gastrointestinal bleeding and perforation because of incomplete electrocoagulation or mechanical incision, especially in gastrointestinal thick-pedunculated polyps which always have thick nutrient blood vessel. Hemoclips can successfully interdict arteriovenous blood because it can clamp tissue firmly without causing necrosis around the target area. Based on its good mechanical hemostasis, hemoclips are not only widely used in treating bleeding like from ulcer, tumor and variceal ligation but also used in removal of thick-pedunculated gastrointestinal polyps in adults. This paper describes the application of endoscopic electrocoagulation with metal hemoclips to remove thick-pedunculated intestinal polpys in children for the first time, sums up the experience and evaluates its efficacy and safety.

METHODSBetween October, 2001 and December, 2002, 5 cases with thick-pedunculated intestinal polpys were presented. The age of the patients ranged from 3 to 5 years. The clinical features were gastrointestinal bleeding or abdominal pain. The longest course of disease was 2 years. Enough preparations for alimentary tract were necessary for polypectomy. The procedures were performed under general anesthesia in order to avoid the risk of bleeding aspiration. Endoscopy was performed in the standard fashion. The apparatus included electronic colonic endoscope (XQ 200, Fuji Corp, Tokyo, Japan), snare (XQ200, Fuji Corp, Tokyo, Japan), impeller of the clip (HX-5QR-1) and hemoclip (MD850) which could be passed through the biopsy channel of endoscope. The clip was completely covered with a hood avoiding any injury to the mucous membrane. The pedicel with diameter of more than 1.0 cm underwent endoscopic electrocoagulation polypectomy with hemoclips. The clip contacted polyps in upright direction. One or more hemoclips were selected to clamp the proximal basement of the pedicel in terms of the pedicel diameter. Turning of the red colour of polyps to purple suggested that hemoclip interdicted arteriovenous blood effectively. The clip was then shut off and electrocoagulation polypectomy was followed. Six polyps were observed and removed.

RESULTSSix polyps including 2 transverse colon polyps and 4 descending colon polyps were resected. Pathological results showed that 3 were juvenile polyps and the other 3 adenomatous polyps. All the polyps were completely resected. The diameter of pedicel were 1.2 - 2.2 cm. The head and pedicel of the biggest polyp was about 5 cm x 5 cm and 2.2 cm, respectively, and five clips were used in order to remove it. No complications of bleeding and perforation were observed in these children. All hemoclips were expelled from intestines within one week. The symptoms of these patients disappeared.

CONCLUSIONMechanical hemostasis with hemoclips successfully interdicted arteriovenous blood of thick-pedunculated polyps. Hemoclips can successfully prevent the complications of bleeding and perforation. The clipping brings about a new method in endoscopic therapy. Endoscopic electrocoagulation polypectomy with hemoclips is a simple, safe and effective method to treat thick-pedunculated gastrointestinal polyps in children and it is a valuable tool in polypectomy for children.

Child ; Child, Preschool ; Endoscopy ; methods ; Humans ; Intestinal Polyps ; surgery ; Surgical Instruments ; Treatment Outcome

OBJECTIVETo investigate the inhibitive effects of chimeric oncolytic adenovirus SG235 on leukemia cells in vitro.

METHODSThe ability of SG235 to infect leukemia cells and the expression of CD46 on blasts from the patient with leukemia were detected by flow cytometry (FACS). The cytotoxicity of the virus was evaluated by MTT assay. Apoptosis induced by SG235 was detected with Annexin-V/PI staining and TUNEL assay followed by FACS analysis.

RESULTThe majority of leukemia cells from the patient with acute leukemia was CD46-positive. GFP-positive cells were 45.1%, 35.7%, 54.2%, 37.0%, 30.1%, %67.1, 17.2% and 33.1% in Mutz-1, Kasumi-1, K562, HL60, Molt- 4, RPMI8226, L428, and Jurkat cell lines treated with SG235-EGFP vector at MOI (multiplicity of infection) of 50 for 48 h.SG235 treatment resulted in marked growth inhibition and apoptosis of Kassumi-1 cells, and also significantly inhibited expression of p-Akt.

CONCLUSIONThe chimeric oncolytic adenovirus SG235 can infect leukemia cell effectively and results in the growth inhibition and apoptosis of Kasumi-1 cells in vitro.

Adenoviridae ; genetics ; Apoptosis ; Cell Line, Tumor ; Cell Proliferation ; Genetic Vectors ; Humans ; Leukemia ; genetics ; metabolism ; pathology ; Membrane Cofactor Protein ; metabolism ; Oncolytic Viruses ; Transfection

OBJECTIVEEndoscopic sclerotherapy has emerged as an effective treatment for bleeding esophageal varices in adults and children but the long-term outcome is poorly defined in children. The present study aimed to study the long-term effect of endoscopic sclerotherapy in children with portal hypertension.

METHODSFifteen patients (age 3 to 14 years) with esophageal variceal bleeding underwent endoscopic injection treatments with 1% Aethoxy-sclerol since 1996. All subjects continued to receive the therapy by repeated intra and extravariceal endoscopic sclerotherapy at intervals of 3 - 4 weeks until the varices disappeared, and received regular endoscopic follow-up.

RESULTSFifteen patients had totally 43 injections, and were followed up from 40 to 86 months (mean 66 months) by endoscopy. Two patients received 2 injections and 5 received 3 before eradication of varices. The mean time needed for varices eradication was 3 to 6 months. Recurrence of varices and bleeding was seen in 3 patients who had duodenal ulcer.

CONCLUSIONEndoscopic sclerotherapy is a safe and effective treatment for pediatric esophageal varices.

Adolescent ; Child ; Child, Preschool ; Duodenal Ulcer ; complications ; Esophageal and Gastric Varices ; etiology ; therapy ; Esophagoscopy ; Gastrointestinal Hemorrhage ; etiology ; therapy ; Humans ; Hypertension, Portal ; complications ; Injections, Intralesional ; Polyethylene Glycols ; administration & dosage ; Recurrence ; Reoperation ; Sclerosing Solutions ; administration & dosage ; Sclerotherapy ; Time Factors ; Treatment Outcome

The aim of the present study was to observe whether protein tyrosine kinase (PTK) within the nucleus tractus solitarius (NTS) was involved in the regulation of ventilatory responses of peripheral chemoreflex. The experiments were performed on anesthetized, immobilized and artificially ventilated rabbits. Peripheral chemoreflex was elicited by ventilating the animal with 10% O2-balance 90% N2. Changes in the peak amplitude and frequency of integrated phrenic nerve activity were observed. The ventilatory responses of peripheral chemoreflex following 0.1 microl microinjection within the NTS of either PTK inhibitor genistein (10 mol/L), AMPA glutamate receptor inhibitor CNQX (10 mol/L),or inactive PTK inhibitor daidzein (10 mol/L) were recorded. The results are as follows: Both genistein and CNQX attenuated the ventilatory responses of peripheral chemoreflex, while no changes occurred following daidzein. The amplitude of integrated phrenic nerve discharge and the phrenic burst frequency were decreased by (-21.77+/-6.93)% and (-24.70+/-7.61)% respectively after administration of genistein. CNQX resulted in similar decreases in the amplitude of phrenic nerve discharge (-27.13+/-7.63)% and the burst frequency (-21.34+/-4.88)%. In addition, the inhibitory effects of CNQX and genistein were the same whether they were applied alone or one after another, indicating that they had no cooperative effects. The results obtained suggest that PTK within the NTS regulates the peripheral chemoreflex control of respiration and that this regulation of PTK may be mediated through the phosphorylation of AMPA receptors in NTS neurons.
Animals ; Brain Stem ; enzymology ; physiology ; Chemoreceptor Cells ; physiology ; Female ; Male ; Protein-Tyrosine Kinases ; physiology ; Rabbits ; Receptors, AMPA ; physiology ; Respiration ; Solitary Nucleus ; enzymology

OBJECTIVETo gain stable genetic modification of neural stem cells (NSC) that constitutively secrete brain-derived neurotropic factor (BDNF) and to explore the biological role on the survival and neurite outgrowth of cultured dorsal root ganglion (DRG) neurons.

METHODSBDNF gene fragment from human brain cDNA libraries was obtained by using PCR. With molecular cloning technique, the recombinant stem cell viral vector with report gene was constructed, which is that MSCV-BDNF-IRES(2)-EGFP vector could encode Polycistronic mRNA. Viral particle was packaged by PT67 cell line and infected neural stem cells (mouse clone: C17.2). After selection with cloning cylinder, the expression of BDNF was assessed by immunohistochemistry enzyme linked immunosorbent assay (ELISA) and reverse transcriptase polymerase chain reaction (RT-PCR). The effects of stable gene-modified neural stem cells on embryonic mouse DRG neurons were evaluated in a dual-chambered cocultivation system at 3th, 10th day.

RESULTSRT-PCR analysis demonstrated expression of mRNA for human-BDNF. ELISA confirmed the presence of secreted BDNF 24 h after transfection and showed that the level of BDNF production by NSC-BDNF transfected C17.2 was at a rate of (14.6 +/- 0.8) ng x d(-1) x 10(-6) cells even after 3 months. With immunohistochemical analysis, compared with the control, the longer neurite outgrowth of cultured DRG cells and the more survival neurons were observed in NSC-BDNF transfected cells group.

CONCLUSIONSBDNF gene could be stably expressed in C17.2 cell line by MSCV, and the BDNF gene-modified NSC markedly enhances the survival and neurite outgrowth of cultured DRG neurons.

Animals ; Brain-Derived Neurotrophic Factor ; biosynthesis ; genetics ; Cell Culture Techniques ; Cell Survival ; Cells, Cultured ; Coculture Techniques ; Ganglia, Spinal ; cytology ; Humans ; Mice ; Neurons ; cytology ; metabolism ; Rats ; Rats, Sprague-Dawley ; Stem Cells ; cytology ; metabolism ; Transfection