OBJECTIVETo study the effects of sacral nerve root electrostimulation (SNS) on the colon function and its mechanisms in rats with spinal cord injury (SCI).

METHODSOne hundred and four Wistar rats were divided into three groups: A, B and C. A group ( n = 24) was divided into three subgroups (n = 8) for studying the bioelectricity: Normal group (NG), SCI group (SCI) and SCI group with SNS(SNS); B group( n = 24) was divided into three subgroups( n = 8) for studying the colon motility: NG, SCI and SNS. C group( n = 56) were divided into three groups for studying the change of morphology and neurotransmitters(SP and VIP): NG (n = 8), SCI (n = 24), and SNS (n = 24) . In SCI and SNS, included of three subgroups: 24, 48, 72 h after spinal cord injury (n = 8).

RESULTSIn SCI group, the activity of bioelectricity in proximal and distal colon was reduced; the colon motility was lessened, and colon mucosa appeared different degree of damage; cell-cell connections between intestinal epithelial cells were destroyed. The expressions of substance P(SP) and vasoactive intestinal peptide (VIP) in colon were decreased obviously. SNS was found to activate the bioelectricity, promote the colon motility, improve the intestinal mucosal, and increase the expressions of SP and VIP. Conclusion: SNS can activate the peristalsis, rehabilitate the motility of denervated colon, protection of the intestinal mechanical barrier between intestinal epithelial cells and tight junction, rebuild the colon function through activating the bioelectricity and increase the expressions of SP and VIP.

Animals ; Colon ; physiopathology ; Electric Stimulation Therapy ; Epithelial Cells ; drug effects ; Intestinal Mucosa ; drug effects ; Lumbosacral Region ; innervation ; Neurotransmitter Agents ; metabolism ; Rats ; Rats, Wistar ; Spinal Cord Injuries ; therapy ; Substance P ; metabolism ; Vasoactive Intestinal Peptide ; metabolism

OBJECTIVETo observe the ultrastructural change of the route of gut bacterial translocation in a rat with spinal cord injury (SCI).

METHODSForty Wistar rats were divided into the following groups: control group and 3 SCI groups (10 in each group). The rats in the SCI groups were established SCI model at 24 h, 48 h, and 72 h after SCI. Small intestine mucous membrane tissue was identified and assayed by transmission electron microscope, scanning electron microscope and immunofluorescence microscopy.

RESULTSSmall intestine mucous membrane tissue in control group was not damaged significantly, but those in SCI groups were damaged significantly. Proliferation bacteria in gut lumen attached on microvilli. The extracellular bacteria torn the intestinal barrier and perforated into the small intestinal mucosal epithelial cell. The bacteria and a lot of particles of the seriously damaged region penetrated into the lymphatic system and the blood system directly. Some bacteria were internalized into the goblet cell through the apical granule. Some bacteria and particles perforated into the submucosa of the M cell running the long axis of M cells through the tight junctions. In the microcirculation of mucosa, the bacteria that had already broken through the microvilli into blood circulation swim accompanying with erythrocytes.

CONCLUSIONThe routes of bacterial translocation interact and format a vicious circle. At early step, the transcellular pathway of bacterial translocation is major. Following with the destroyed small intestine mucous, the routes of bacterial translocation through the lymphatic system and the blood system become direct pathways. The goblet cell-dendritic cell and M cell pathway also play an important role in the bacterial translocation.

Animals ; Bacteria ; Bacterial Translocation ; Epithelial Cells ; microbiology ; Goblet Cells ; microbiology ; Intestinal Mucosa ; microbiology ; pathology ; ultrastructure ; Intestine, Small ; microbiology ; pathology ; ultrastructure ; Microvilli ; microbiology ; Rats ; Rats, Wistar ; Spinal Cord Injuries ; microbiology

Bacteremia ; diagnosis ; Humans ; Infant, Newborn ; Male ; Pseudomonas Infections ; diagnosis

AIM:To analyze the cause of posterior capsular rupture in small incision non - phacoemulsification cataract surgery and investigate the treatment methods.
METHODS: The clinical data of 108 cases ( 121 eyes ) undergone small incision non - phacoemulsification cataract surgery combined with intraocular lenses ( IOL) implantation were retrospectively analyzed. The causes of posterior capsular rupture and treatment of 6 patients (6 eyes) after surgery were analyzed and summarized.
RESULTS: Six cases ( 6 eyes, 4. 96%) occurred posterior capsular rupture during the operation, of which 2 cases ( 2 eyes ) underwent posterior chamber IOL implantation intraoperative, 2 cases (2 eyes) receivedIIstage IOL implantation in the ciliary sulcus at 1wk postoperative, 2 cases ( 2 eyes ) were given anterior chamber IOL implantation. One case ( 1 eye ) whose vision acuity <0. 1 was macular degeneration; One case ( 1 eye ) whose vision acuity = 0. 3 was diabetic retinopathy;0. 4~0. 6 in 2 cases (2 eyes), 0. 6~0. 8 in 2 cases (2 eyes) after 1 ~3mo postoperatively. No severe syndrome was found after surgery.
CONCLUSION:Posterior capsular rupture which occurs in different stages of the operation is the commonest intraoperative complication in small lincision non -phacoemulsification cataract surgery. With improving operative techniques, and continuously accumulating experience, incidence of posterior capsular rupture can be effectively reduced. Even posterior capsular rupture occurs intraoperative, patients can still get a good outcome after timely and proper treatment.

Occupational Medicine ; education

This paper established a near-infrared spectroscopy quantitative model for simultaneous quantitative analysis of coptisine hydrochloride, dehydrocorydaline, tetrahydropalmatine, corydaline and glaucine in Corydalis Rhizoma. Firstly, the chemical values of the five components in Corydalis Rhizoma were determined by the reversed-phase high performance liquid chromatography (RP-HPLC) with UV detection. Then, the quantitative calibration model was established and optimized by fourier transformation near-infrared spectroscopy (NIRS) combined with partial least square (PLS) regression. The calibration model was evaluated by correlation coefficient (r), the root-mean-square error of calibration (RMSEC) and the root mean square of cross-validation (RMSECV) of the calibration model, as well as the correlation coefficient (r) and the root mean square of prediction (RMSEP) of prediction model. For the quantitative calibration model, the r, RMSEC and RMSECV of coptisine hydrochloride, dehydrocorydaline, tetrahydropalmatine, corydaline and glaucine were 0.941 0, 0.972 7, 0.964 3, 0.978 1, 0.979 9; 0.006 7, 0.003 5, 0.005 9, 0.002 8, 0.005 9; and 0.015, 0.011, 0.020, 0.010 and 0.022, respectively. For the prediction model, the r and RMSEP of the five components were 0.916 6, 0.942 9, 0.943 6, 0.916 7, 0.914 5; and 0.009, 0.006 6, 0.007 5, 0.006 9 and 0.011, respectively. The established near-infrared spectroscopy quantitative model is relatively stable, accurate and reliable for the simultaneous quantitative analysis of the five alkaloids, and is expected to be used for the rapid determination of the five components in crude drug of Corydalis Rhizoma.
Alkaloids ; chemistry ; Corydalis ; chemistry ; Drugs, Chinese Herbal ; chemistry ; Quality Control ; Rhizome ; chemistry ; Spectroscopy, Near-Infrared ; methods

This study aimed to analyze the etiology of the encephalitis outbreak in Longyan, Fujian Province, China in 2010, in order to provide valuable information for this prevention and control of this disease. Pathogens were confirmed from cerebrospinal fluid samples with fluorescent RT-PCR, virus isolation (RD cells), and neutralization tests. Then, the VP1 fragments or whole genome nucleotide sequences were determined for four virus strains using PCR. Homology was assessed using the MegAlign software, and a phylogenetic evolutionary tree was drawn using Mega 4.0 software. The results confirmed that the etiology of the outbreak was the ECHO6 intestinal virus, and the nucleotide sequence of the VP1 segment indicated that the C2 subtype was responsible. The genome sequence consisted of 7407 nucleotides, and resembled the genome of other ECHO and CoxB viruses with homology levels of 78.5%-87.3%. The encephalitis outbreak in Longyan in 2010 was caused by the ECHO6 C2 subtype intestinal virus, and its complete genome sequence length is similar to the standard strain (U16283) with a sequence homology of 80.4%.
Child, Preschool ; China ; epidemiology ; Disease Outbreaks ; Echovirus 6, Human ; classification ; genetics ; isolation & purification ; Echovirus Infections ; epidemiology ; virology ; Encephalitis ; epidemiology ; virology ; Female ; Humans ; Infant ; Male ; Molecular Sequence Data ; Phylogeny

Objective To insestigate the pathophysiological mechanisms of spontaneous transient hyperperfusion after cerebral ischemia-reperfusion in rats.Methods Fifty-two SD rats were randomly allocated into sham-operation(group A),cerebral ischcmia 2-hour(group B), and cerebral ischemia 6-hour(group C)groups.Group B were redivided into 0-,0.5-,1-,2-,4-,6-,and 24-hour subgroups according to the reperfusion time;group C were redivided into 0-,0.5-,1-,2-,and 24-hour subgroups according to the reperfusion time (n=4 in each subgroup). Multislice spiral CT perfusion imaging(CTPI)was performed at different time points after ischemia-reperfusion in each group.After completing the scanning.the rats were sacrificed immediately for optical and electron microscopy examinations.Results In group A,compared to the contralateral sides.there were no significant differences in the relatise value of the cerebral blood flow parameters and the results of optical and electron microscopy in the sham-operated regions. In group B, the relative cerebral blood flow (rCBF) and relative cerebral blood volume (rCBV) in the ischemic core area were increased gradually with the extension of reperfusion time. The relative mean transit time (rMTT) and the relative time to peak (rTTP) were decreased gradually, There were no significant differences compared to group A at 6-hour after reperfusion. The optical and electron microscopy revealed that neuronal density in the ischemic core area in group B were decreased, part of the cell volume enlarged and showed vacuolated changes, and part of the neuronal cell bodies and nuclei shrinked, rCBF in the ischemic core area still maintained lower level with the extension of reperfusion time in group C. The ischemic core area showed the increased transient rCBV and rCBV at 0.5 hour after reperfusion in group B and C. The optical and electron microscopy showed that the ischemic core area presented a large number of necrotic and apoptotic cells, and inflammatory cell infiltration. At 6 hours after reperfusion in group B, the increased blood density was observed under the electron microscope in the ischemic core area, showing capillary engorgement and increased pressure. Conclusions The dynamic changes of CTPI in the process of rat middle cerebral artery occlusion and reperfusion have a certain correlation with the pathological mechanisms of injury. The ultra-early spontaneous and transient hyperperfusion after cerebral ischemia-reperfusion in rats is associated with the transient inflammatory hyperemia after reperfusion injury.

Carcinoma, Hepatocellular ; complications ; Hemangioma ; complications ; diagnosis ; immunology ; pathology ; Hepatitis B, Chronic ; complications ; Hepatocytes ; cytology ; pathology ; Humans ; Liver Cirrhosis ; complications ; Liver Neoplasms ; complications ; Male ; Middle Aged ; Platelet Endothelial Cell Adhesion Molecule-1 ; immunology ; Spleen ; immunology ; pathology ; Tomography, X-Ray Computed

Adult ; Aged ; Aged, 80 and over ; Carcinoma, Squamous Cell ; metabolism ; pathology ; radiotherapy ; Esophageal Neoplasms ; metabolism ; pathology ; radiotherapy ; Female ; Follow-Up Studies ; Gene Expression Regulation, Neoplastic ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Inhibitor of Apoptosis Proteins ; Lymphatic Metastasis ; Male ; Microtubule-Associated Proteins ; metabolism ; Middle Aged ; Neoplasm Staging ; Paraffin Embedding ; Survival Rate ; Vascular Endothelial Growth Factor A ; metabolism