Objective To estimate the incidence,clinicopathological characteristics and therapeutic features in children with solid pseudopapillary tumors of the pancreas(SPTP).Methods Nine eases of children SPTP after diagnosis were collected in our hospital.Routine HE,PAS staining and immunohiatochemical staining of multiple indicators were analyzed,combined with literature analysis of clinical manifestations,imaging,pathological features,surgical treatment and follow-up case.Results The average age in nine cases of SPTP was 10.3 years.The SPTP patients in children in our hospital accounted for 29.0% of pancreas solid tumors.Many clinical manifestations were abdominal pain(5 cases,55.56%),abdominal mass(3 cases,33.33%),jaundice(1 cases,11.11%),and other symptoms.B-ultrasonography and CT showed pancreatic lesions,clear boundary,was solid and cystic,and some have a little calcification.Pathological features:tumor limitations,capsule integrity,and cross-section alternating solid and cystic lesions,tumors organizations sheet hemorrhage,necrosis and cystic change.Immunohistochemically,the positive rates were 100% for α1-AT,66.7% for NSE,33.3% for S-100 and 100% for PAS.The patients were followed-up for 4 months to 10 years and were alive postoperatively,but no local recurrence and distant metastasis.Histological examination showed solid with cystic areas and papillary protrusions.Conclusion SPTP should be the second most common pancreatic tumor in children.Girls were more frequently affected.The overall prognosis following surgical resection was good.

Photoaffinity labeling is widely applied to demonstrate targets of small molecule ligands. In this paper, biotin photoaffinity labeled molecule with propargyl group 1 has been designed and synthesized, followed it's labeling of N2-acetyl-2'-O-propargyl guanosine 9 by "click chemistry". This technology presents delight development potential in labeling of second messenger cyclic nucleotide, antisense oligonucleotide or siRNA.
Biotin ; chemistry ; Click Chemistry ; Guanosine ; chemical synthesis ; chemistry ; Ligands ; Photoaffinity Labels

OBJECTIVETo establish a simple but effective method of laser scanning confocal microscopic imaging for Ca2+ oscillations of pancreatic acinar cells in adult mice.

METHODSPancreatic acinar cells from adult Kunming mice were isolated acutely with collagenase, and then loaded with fluo-4-AM, a Ca2+ indicator. A laser scanning confocal microscope armed with 488 nm laser was employed to record the dynamic fluorescent signals in-time and synchronously while acetylcholine (ACh) was added in the pancreatic acinar cells.

RESULTS(1) The classic pancreatic acinar cell Ca2+ oscillations were induced by a certain concentration of ACh (100 nmol/L) successfully and steadily, which could be blocked by atropine completely. (2) Plasmic Ca2+ oscillations from different parts of one acinar cell were usually with different amplitudes and almost the same frequencies. But both of amplitudes and frequencies were different among different cells. (3) The acinar cell Ca2+ oscillations were induced by ACh in a concentration-dependent manner.

CONCLUSIONThe laser scanning confocal microscopic imaging for adult mouse pancreatic acinar cell Ca2+ oscillations was established successfully. The features of being easy to use, direct to see lively, high efficiency and good flexibility make it a popular tool for researchers to choose.

Acinar Cells ; chemistry ; Animals ; Calcium ; analysis ; Calcium Signaling ; Cells, Cultured ; Mice ; Microscopy, Confocal ; methods ; Pancreas ; cytology

Photoaffinity labeling is widely applied to demonstrate targets of small molecule ligands. In this paper, biotin photoaffinity labeled molecule with propargyl group 1 has been designed and synthesized, followed it's labeling of N2-acetyl-2'-O-propargyl guanosine 9 by "click chemistry". This technology presents delight development potential in labeling of second messenger cyclic nucleotide, antisense oligonucleotide or siRNA.

As an important inorganic element, iodine not only plays an important role in human growth and metabolism, but also has an irreplaceable role in the chemical engineering, medicine, food and other fields.Thus the detection of iodine ion is of important significance.In this work, colorimetric recognition and sensing of iodine ion with high sensitivity was proposed based on target induced shielding of the peroxidase-like activity of bare platinum nanoparticles ( PtNPs ).This assay exhibited simplicity and cost-effectiveness.The recognition of iodine ion by bare PtNPs could be fulfilled in a few seconds and the assay could be accomplished within 10 min.The detection range for iodine ion was 20 nmol/L-5.0 μmol/L and the detection limit was 8 nmol/L ( S/N = 3 ).Furthermore, the new assay system did not require surface modification of nanoparticles, nor complex organic synthesis.This assay was successfully applied to detection of iodine concentration in real salt and water samples, exhibiting promising application prospects.

The therapeutic effect of sustained intravitreal injectable voriconazole microspheres (VCZ-MS) on an experimental endophthalmitis of Aspergillus fumigatus was investigated. VCZ-MS was prepared successfully and its physico-chemical property was also evaluated. Right eyes of albino rabbits were infected with an intravitreal injection of 1 000 CFU x mL(-1) of susceptible Aspergillus fumigatus. All fungal endophthalmitis models were randomly divided into five groups 48 hours later: Group A is control group with no treatment; in group B, vitrectomy was performed combined with intravitreal 3 times injections of 100 microg x 0.1 mL(-1) voriconazole every other day. In group C, D and E, vitrectomy was performed combined with intravitreal injection of 0.5 mg, 1.0 mg and 1.5 mg VCZ-MS respectively. The treatment effect was assessed by slit lamp and indirect ophthalmoscope funduscopy examination, using clinical grading system of inflammation in the anterior chamber and the vitreous opacity. The optical microscopy revealed that microspheres obtained from the experiment design were opaque, discrete and spherical particles with smooth surfaces. The drug content and encapsulation efficiency of microspheres were 29.94% and 73.5%, respectively. Endophthalmitis occurred in all eyes of group A, and rapidly developed to panophthalmitis. The inflammation grade of group B, C, D or E was lower than that of group A (P < 0.05). The grade of vitreous opacity in group C, D, E is lower than group B (P < 0.05). Two eyes in group C developed to panophthalmitis. But in group D and E, all eyes whose inflammation was controlled had no recurrence with vitreous clear. Histopathological examination showed normal structures in the cured eyes, while most uncured eyes were atrophic and with eyeball destroyed. So, it can be safely concluded that the curative effect of intravitreal VCZ-MS is significantly better than that of routine intraocular injection of voriconazole. The optimal dose is the one containing 1.0 mg voriconazole.
Animals ; Antifungal Agents ; administration & dosage ; therapeutic use ; Aspergillosis ; drug therapy ; pathology ; Aspergillus fumigatus ; Delayed-Action Preparations ; Endophthalmitis ; drug therapy ; microbiology ; pathology ; Eye ; microbiology ; pathology ; Female ; Intravitreal Injections ; Lactic Acid ; Male ; Microspheres ; Polyglycolic Acid ; Pyrimidines ; administration & dosage ; therapeutic use ; Rabbits ; Random Allocation ; Triazoles ; administration & dosage ; therapeutic use ; Voriconazole

OBJECTIVETo investigate the role and significance of Wnt/beta-catenin signaling pathway regulating GSK-3beta, STAT3, Smad3 and TERT in hepatocellular carcinoma (HCC).

METHODSThe HCC cell line HepG2 was transfected with small interfering RNA (siRNA) directed against beta-catenin. Proteins were extracted and the expressions of beta-catenin, GSK-3beta, p-GSK-3beta, STAT3, Smad3 and TERT were detected by Western blot at 72 h and 96 h respectively after transfection.

RESULTSbeta-catenin expression was inhibited at both time points and the expression at 96 h was higher than that at 72 h (t = 4.43, P < 0.05). Interestingly, GSK-3beta and p-GSK-3beta expressions increased gradually at 72 and 96 h (tGSK-3beta= 4.98, tp-GSK-3beta= 29.83, P < 0.05) respectively, and STAT3 expression showed no alteration after transfection (F = 0.49, P > 0.05). Smad3 expression was increased at 72 h (t = 10.67, P < 0.05) and decreased to normal at 96 h (t = 1.26, P < 0.05), while TERT expression decreased at 72 h (t = 4.18, P is less than 0.05) and increased to normal at 96 h (t = 1.26, P > 0.05).

CONCLUSIONSWnt/beta-catenin signaling pathway is related to the expressions of GSK-3beta, Smad3 and TERT, but perhaps not related to STAT3 protein expression in HCC. It suggested that Wnt/beta-catenin signaling pathway might participate in HCC genesis and development through regulating the above three factors.

Carcinoma, Hepatocellular ; metabolism ; pathology ; Hep G2 Cells ; Humans ; Liver Neoplasms ; metabolism ; pathology ; RNA, Small Interfering ; Signal Transduction ; Wnt Proteins ; metabolism ; beta Catenin ; metabolism

Objective To explore risk factors of influencing operating efficiency of endoscopic submucosal dissection (ESD) for gastric mucosal lesions. Methods The data of 304 cases with gastric mucosal lesion undergoing ESD in Xijing Hospital of Digestive Disease from April 2009 to February 2017 were retrospectively analyzed. The procedure time and complete resection rate ( R0 resection rate ) were regarded as indicators of ESD efficiency. Risk factors influencing procedure time and R0 resection rate were analyzed using Chi-square test and logistic regression. Results Using median procedure time of 45 min as the cutoff value, Chi-square test showed that specimen size ( P=0. 000) , lesion location ( P=0. 001) , and pathological type ( P=0. 003) affected the operation time. Further logistic regression analysis indicated that specimen size (≥40 mm/<40 mm, P<0. 001, OR=3. 748, 95％CI: 2. 247-6. 254) and lesion location (upper or middle 1/3 of stomach/lower 1/3 of stomach, P=0. 001, OR=2. 180, 95％CI: 1. 318-3. 606) were independent risk factors of procedure time. Using R0 resection as outcome measure, neither single nor multiple parameter analysis was statistically significant. Conclusion Specimen size and lesion location are independent risk factors influencing efficiency of gastric mucosal ESD, and could be possibly used to estimate the procedure time of ESD.

Objective To explore the effect of intermedin ( IMD ) and adrenomedullin ( ADM ) on cerebral microcirculation in rats with cerebral ischemia. Methods Rat cerebral ischemia ( CI) model was established by middle cerebral artery occlusion. 40 SPF male adult Sprague-Dawley ( SD) rats were randomly divided into three groups:CI+NS ( normal saline) group, CI+ADM group and CI+IMD group, which were used to observe the changes of brain surface microcirculatory perfusion with a laser Doppler flowmeter. Results The differences of brain surface microcirculatory perfusion were statistically significant among the CI+NS group, CI+ADM group and CI+IMD group ( F=53. 426, P<0. 05 ) . Multiple comparison showed that the brain surface microcirculatory perfusion in the CI+IMD group was higher than that of the CI+NS group and CI+ADM group. Conclusions Intermedin can improve the cerebral microcirculation in rats with cerebral ischemia, and its therapeutic effect is better than adrenomedullin.

Avian trichomoniasis caused by Trichomonas gallinae is a serious protozoan disease worldwide. The domestic pigeon (Columba livia domestica) is the main host for T. gallinae and plays an important role in the spread of the disease. Based on the internal transcribed spacers of nuclear ribosomal DNA of this parasite, a pair of primers (TgF2/TgR2) was designed and used to develop a PCR assay for the diagnosis of T. gallinae infection in domestic pigeons. This approach allowed the identification of T. gallinae, and no amplicons were produced when using DNA from other common avian pathogens. The minimum amount of DNA detectable by the specific PCR assay developed in this study was 15 pg. Clinical samples from Guangzhou, China, were examined using this PCR assay and a standard microscopy method, and their molecular characteristics were determined by phylogenetic analysis. All of the T. gallinae-positive samples detected by microscopic examination were also detected as positive by the PCR assay. Most of the samples identified as negative by microscopic examination were detected as T. gallinae positive by the PCR assay and were confirmed by sequencing. The positive samples of T. gallinae collected from Guangzhou, China, were identified as T. gallinae genotype B by sequencing and phylogenetic analyses, providing relevant data for studying the ecology and population genetic structures of trichomonads and for the prevention and control of the diseases they cause.
China* ; Columbidae* ; Diagnosis ; DNA ; DNA, Ribosomal ; Ecology ; Genetic Structures ; Genotype ; Methods ; Microscopy ; Parasites ; Polymerase Chain Reaction* ; Trichomonas*