Adolescent ; Female ; Heart Septal Defects, Atrial ; complications ; therapy ; Humans ; Male ; Pulmonary Veins ; abnormalities ; Young Adult

Female ; Humans ; Male ; Occupational Diseases ; epidemiology ; Proportional Hazards Models ; Time Factors ; Trinitrotoluene ; poisoning

Objective To explore an ideal approach to establish rabbit model of hepatic fibrosis suitable for radiological and serological research.Methods Totally 40 rabbit models of hepatic fibrosis was established by intraperitoneally injecting 5% carbon tetrachloride in oil solution or 100% carbon tetrachloride(both groups,0.1 ml/kg,once a week),and drinking 5% ethanol water.Another 8 rabbits who drank normal water and received a peritoneal injection at 0.1 ml/kg served as control.The rabbits(5 or 2 per time for model group and control) were killed at 6,8,10 and 12 weeks respectively after first injection.Their livers were resected for gross and morphological observation with HE and Masson staining.Results Death of the models usually happened within 4 weeks after first injection and became stable after 6 weeks.Mortality of 5% carbon tetrachloride group was 60%,but 25% in 100% carbon tetrachloride group.Macroscopy and microscopy indicated that liver fibrosis was observed in rat models.Conclusion Long-term intraperitoneal injection of carbon tetrachloride results in rabbit hepatic fibrosis.Injection of 100% carbon tetrachloride intraperitoneal,at 0.1 ml/kg,once a week,combined with and 5% ethanol as drinking water is a suitable approach to establish rabbit model of hepatic fibrosis with low mortality and high success rate.

AIM: To observe clinical efficacy of the intravitreal injection of conbercept treatment for exudative age -related macular degeneration.
METHODS:Prospective study. Totally 112 senile patients (112 eyes) with exudative macular degeneration were randomly divided into study group and the control group, 56 cases in each group. The study group were treated with intravitreal injection of conbercept. The control group received conservative treatment. Uncorrected visual acuity and foveal retinal thickness were observed before and after treatment in the two groups.
RESULTS: Visual acuity of study group improved significantly, and the most obvious improvement was observed at 6mo after treatment. Foveal retinal thickness of study group was reduced after treatment, and the most obvious decrease was observed at 6mo after treatment.CONCLUSION: Intravitreal injection of conbercept can improve visual acuity reduced foveal thickness in senile patients with exudative age - related macular degeneration.

Objective: To investigate the circadian ryhthm v ariation of 2-125I-iodomelatonin (125I-Mel) binding sites in the human peripheral leukocytes in patients with acute cerebral infarction. Methods: Melatonin binding sites in the human peripheral leukocytes were studied using 125　I-Mel as a radioligand (radioligand binding assays).A ll patients ［age: (70.18±11.70) years］ were diagnosed by CT according to the standard ［Chin J Nerv， 1996,29(6):379］. We also studied 15 age-match ed healthy old people as the control ［age: (68.33±7.76) years］. Resul ts: The circadian ryhthm variation of 125　I-Mel specific binding in control remained significant (P<0.01) with a higher value at midlight ［ (0.16±0.049) fmol/106］ than at middark ［(0.078±0.035) fmol/106］ with one point analysis. There was no significant variation in the patient grou p (P>0.05). The specific binding in the peripheral leukocytes at midlight in the patients with acute cerebral infarction were lower than that of the control . Conclusion: The expression of Mel receptor decreases in the pa tients wit h acute cerebral infarction and the circadian ryhthm variation of 2-125I -Mel appears abnormal.

ObjectiveTo analyze the risk factors related to perforation of lateral wall by lower cervical pedicle screw instrumentation in the treatment of cervical spinal disorders. MethodsA retrospective review was made to analyze 214 cervical vertebral injury patients ( 1 024 pedicle screws were used) treated with pedicle screw instrumentation at C3-7 from July 2004 to July 2009. Lateral walls of 18 patients were perforated (a total of 28 pedicle screws). The surgeons assessed the position and the angle of the screw in the pedicle, and the relation and the distance between the screw and the pedicle walls by carefully probing intraoperative walls of cervical pedicles and studying postoperative thin-slice computed tomography (CT) scan of the fixed vertebral segments of the cervical spine. The data of patients with lateral wall perforation was recorded and analyzed statistically. ResultsPerforation of the lateral wall occurred in 18 patients (28 pedicle screws). Backward step by step Logistic regression analysis was used and two variables were selected in the end. ConclusionsRatio variance between inner and lateral wall is the risk factor of perforation in the lateral wall associated with lower cervical pedicle screw instrumentation, while the angle variance between implanted screws and CT measurements is the protection factor of perforation in the lateral wall.

Carcinoma, Medullary ; complications ; pathology ; Humans ; Male ; Middle Aged ; Thyroid Neoplasms ; complications ; pathology

OBJECTIVE: Mitochondrial deoxyribonucleic acid (mtDNA) 8344 A>G (m.8344A>G) mutation is the common mutation associated with mitochondrial myoclonus epilepsy with ragged-red fibers (MERRF) syndrome. Herein we report a rare case with mitochondrial encephalopathy, lactic acidosis and stroke-like episodes/MERRF/Leigh (MELAS/MERRF/Leigh) overlap syndrome caused by m.8344A>G mutation. METHODS: The clinical and imaging data of the patient were collected and an open muscle biopsy was carried out. We further employed molecular genetic analyses to detect mtDNA mutation in the proband and his mother. And then a clinical and neuroimaging follow-up was performed. RESULTS: This patient was a 25-year-old male, who developed exercise intolerance since the age of 6. At age 10, he suffered from acute episodes of hemianopia, and cranial magnetic resonance imaging (MRI) showed occipital stroke-like lesions and cranial magnetic resonance spectroscopy (MRS) revealed a lactate peak corresponding to the lesion. After that the patient presented slowly progressive psychomotor decline. He had myoclonic seizures and cerebellar ataxia since the age of 12. At age 21, he was admitted to our hospital because of confusion and cranial MRI revealed symmetrical lesions in bilateral posterior putamen, thalami and midbrain. Then repeated MRI showed progression of original lesions and new frontal multiple stroke-like lesions. Symptomatic and rehabilitation treatment relieved his condition. Follow-up cranial MRI at age 24 showed the lesions in basal ganglia and thalami diminished, and the midbrain lesions even completely vanished. Muscle pathology indicated the presence of numerous scattered ragged-red fibers (RRF), suggestive of a mitochondrial disorder. Polymerase chain reaction-restricted fragment length polymorphism (PCR-RFLP) detected the m.8344A>G mutation of the MT-TK gene encoding mitochondrial transfer RNA for lysine in the patient's blood. Next generation sequencing (NGS) of the whole mitochondrial genome identified that the proportion of m.8344A>G was 90%, and no other mtDNA mutation was detected. Sanger sequencing further identified this mutation both in the proband and his mother's blood, although the mutation load was much lower in his mother's blood with approximately 10% heteroplasmy. CONCLUSION The present study is the first to describe a patient with m.8344A>G mutation in association with the MELAS/MERRF/Leigh overlap syndrome, which expands the phenotypic spectrum of the m.8344A>G mutation.
Acidosis, Lactic ; Adult ; Child ; DNA, Mitochondrial/genetics* ; Humans ; Male ; Mitochondrial Encephalomyopathies ; Mutation ; Stroke ; Young Adult

Objective To compare the diagnostic value of renal ultrasound scan (RUS) and 99Tcmdimercaptosuccinic acid (DMSA) renal scintigraphy in children with acute pyelonephritis (APN). Methods In all, 165 children with initial clinical diagnosis of APN, aged from 1.5 months to 11 yrs ( median 20 months), were included in the study, all of which were examined with RUS and DMSA renal scientigraphy. The diagnosis with DMSA renal scientigraphy results was taken as the standard reference to evaluate the diagnostic sensitivity and specificity of RUS. Results Of 99 out of all 330 kidneys that were found abnormal on DMSA renal scientigraphy, 31 were abnormal on RUS. Of the rest normal kidneys on DMSA scans renal scientigraphy, 4 were abnormal on RUS. Thus diagnostic sensitivity of RUS for APN was 31.3%(31/99) and specificity was 98.3% (227/231). Conclusions Although RUS provides with high diagnostic specificity for children with APN, its low sensitivity may underestimate the clinical evaluation of APN.More often than not, 99Tcm-DMSA renal scientigraphy is a clinical necesscity for the definite RUS diagnosis.

A double targets of high throughput screening model for xanthine oxidase inhibitors and superoxide anion scavengers was established. In the reaction system of xanthine oxidase, WST-1 works as the probe for the ultra oxygen anion generation, and product uric acid works as xanthine oxidase activity indicator. By using SpectraMax M5 continuous spectrum enzyme sign reflectoscope reflector, the changes of these indicators' concentration were observed and the influence factors of this reaction system to establish the high throughput screening model were studied. And the model is confirmed by positive drugs. In the reaction system, the final volume of reaction system is 50 μL and the concentrations of xanthine oxidase is 4 mU x mL(-1), xanthine 250 μmol x L(-1) and WST-1 100 μmol x L(-1), separately. The Z'-factor of model for xanthine oxidase inhibitors is 0.537 4, S/N is 47.519 9; the Z'-factor of model for superoxide anion scavengers is 0.507 4, S/N is 5.388 9. This model for xanthine oxidase inhibitors and superoxide anion scavengers has more common characteristics of the good stability, the fewer reagent types and quantity, the good repeatability, and so on. And it can be widely applied in high-throughput screening research.
Enzyme Inhibitors ; pharmacology ; Free Radical Scavengers ; pharmacology ; High-Throughput Screening Assays ; Superoxides ; Uric Acid ; Xanthine ; Xanthine Oxidase ; antagonists & inhibitors