The basic principle,characters and applications of I 2 C bus protocol are introduced in this paper.Its application to implantable e lectrical stimulator is also described based on MAX5630,a DAC chip produced by M AXIM Corporation.

Parkinson's disease(PD)is a common neurodegenerative disease mainly affecting old persons.The pathogenesis of PD is still unclear, although it has been studied for many years.Recently, more and more evidences show that the dysfunction of autophagy plays a pivotal role in the pathogenesis of PD.Substantial progress in the genetic research of PD has showed that several pathogenic genes were identified correlated with autophagy, in particular, playing an important role in sporadic cases of PD.Here, we will discuss pathogenic genes-correlated dysfunctional autophagy-lysosomes system, so as to specify the pathogenesis of PD and provide a clue for its treatment.

Objective To explore the value of contrast-enhanced ultrasound(CEUS) in diagnosis of placental accrete,placental increta and placental percreta. Methods Twenty suspected patients of placental accrete, placental increta and placental percreta were examined with CEUS after routine ultrasound examination. Sono Vue was injected intravenously as bolus and a real time CEUS was performed to observe the characteristics. Results Comparison of 15 CEUS cases with uterine curettage, 8 cases had a clear relationship between the residual disease of the uterine cavity and uterine wall,7 cases had a thin thickness (2-4 mm) between the residual disease of the uterine cavity and uterine wall. Five of the 20 cases performed cesarean cesion,3 cases of the uterine serosa of placenta affixing part were very thin,incomplete and rough, demonstrating placenta increta and placenta percreta, 1 case of uterine rupture showed non-invasiveness between uterine wall and uterine serosa,and 1 case of placenta increta pathologically proven, initially suspected gestational trophoblastic disease by the CEUS. Conclusions CEUS provides an important diagnostic message for placental accrete, placental increta and placental percreta by showing the different characteristics of the perfusion image.

Objective To investigate the effect of predeposit autotransfusion in operation of the patients with lumbar disc protrusion.Methods Fifty patients of transfusion with lumbar disc protrusion were assigned into two groups by stratified sampling randomly,30 patients whose blood were predeposited before operation in experimental group,and the other 20 patients whose blood were not predeposited before operation in control group.The blood loss,the blood requirements during operations,the hemotological routine indexes and the complications related to blood transfusion were compared respectively.Results The blood loss of experimental group [ (720 ± 665 ) ml ] perioperative period was lower than that of control group [ ( 1060 ± 558 ) ml ],but there was no significant difference between two groups (P ＞ 0.05 ).All the patients in experimental group went through perioperative period safely without allogenic blood transfusion.Hemoglobin,red blood cell and white blood cell were not significantly different between two groups before and after operation for 3,7 days (P＞ 0.05 ),the platelet count after operation for 7 days was significantly different between two groups (P ＜ 0.05).No complication was observed in experimental group but 1 case with complication was observed in control group.Conclusions Predeposit autotransfusion is an effective to avoid homologous blood transfusion and its complications for the patients with lumbar disc protrusion.Furthermore,the clinical effect is not significantly different between the predeposit autotransfusion patients and the allogenic blood transfusion patients.

Objective To analyze the cause and treatment of the postoperative complications using one-stage posterior spinal osteotomy in the treatment of severe spinal deformity.Methods From September 2006 to May 2013,17 patients with severe spinal deformity (congenital scoliosis in 11 cases,congenital kyphosis in 4 cases,and congenital kyphoscoliosis in 2 cases) underwent one-stage posterior spinal osteotomy,including 5 males and 12 females with an average age of 22.6 (14-51) years.The preoperative mean coronal Cobb angle was 109° (85°-160°) while the mean sagittal Cobb angle was 104° (65°-152°).Two patients had neurological symptoms preoperatively whose spinal cord function was D,evaluated by ASIA classification.All patients were treated with pedicle subtration osteotomy and pedicle screw internal fixation,which SPO osteotomy 2 cases,PSO osteotomy 11 cases,VCR osteotomy 4 cases.Results There were 17 cases of complications in 147 patients,the complication rate was 11.6％(17/147).The causes were as followed,screw malposition in 2 cases,compromised by close of resected areas in 2 case,residual bone compression in 1 case,acute spinal cord injury in 2 cases,infection in 2 cases,broken stick or loosen hat in 3 cases,and superior mesenteric artery syndrome in 5 cases.Postoperative neurological complications occurred in 7 cases.Two cases with preoperative ASIA D became ASIA C,5 cases with normal nerve function became ASIA C in 2 cases and ASIA D in 3 cases.After surgical exploration,given Methylprednisolone and neurotrophic drugs,removal or changing of the internal fixation,anti-infection and symptomatic treatment,15 cases recovered completely and 2 cases improved partially.Conclusion One-stage posterior spinal osteotomy for severe spinal deformity is technical demanding and risky,and the postoperative complications are common.Appropriate operative procedure,close observation of sensation and motor function,timely surgical exploration and nerve decompression,and early brace wear are all required.

BACKGROUND:The decel ularized porcine smal intestinal submucosa is a kind of bioactive extracel ular matrix, which is mainly composed of col agen, glycoprotein, proteoglycan and rich in col agen, glycosaminoglycan and various growth factors, and these components play an important role in promoting the differentiation and proliferation of tissue cel s. OBJECTIVE:To prepare the injectable smal intestinal submucosa and to investigate its co-culture with rat adipose-derived mesenchymal stem cel s in vitro. METHODS:The injectable smal intestinal submucosa and rat adipose-derived stem cel s were prepared. Cel counting kit-8 test for cel proliferation:Passage 3 adipose-derived stem cel s were seeded onto the injectable smal intestinal submucosa (experimental group) and cel s cultured under normal condition as control group. The cel proliferation was observed at 1, 3, 5 and 7 days of incubation. Live/dead staining test for the survival of cel s:Passage 3 adipose-derived stem cel s were respectively cultured in the injectable smal intestinal submucosa extracts (experimental group) and complete culture medium (control group). Cel survival was determined at 1, 3, 5 and 7 days of culture. RESULTS AND CONCLUSION:Scanning electron microscope oval and strip adipose-derived stem cel s adhered onto the material. The absorbance values in the experimental group were higher than those in the control group at 1 and 5 days of incubation (P<0.05). Cel survival:The number of cel s appeared to be in a rising trend with time in both two groups;after 1-day co-culture, al cel s in the two groups survived. Then dead cel s appeared in both two groups, showing no significant difference. These results show that the injectable smal intestinal submucosa exhibits a good cytocompatibility.

Aim To investigate the relationship be-tween the cardioprotection of apigenin ( Api ) from an-oxia/reoxygenation ( A/R) injury and Bcl-2 pathway. Methods H9 c2 cardiomyocytes were cultured and di-vided into normal control group, A/R group, Api pre-treatment group ( Api ) , Api + Bcl-2 inhibitor group ( Api + ABT-737 ) . Expression of Bcl-2 was deter-mined by Western blot,and cell viability was measured by MTT method. LDH, SOD, GSH-Px, MDA activity were determined by chromometry. ROS generation, mi-tochondrial membrane potential and apoptosis were de-termined by flow cytometry. Results 25h after apige-nin precondition,the expression of Bcl-2 was upregulat-ed in cardiomyocytes ( P <0. 01 ) . In the group pre-treated with 40 μmol · L-1 apigenin before A/R, the activity of LDH in culture medium decreased; the ac-tivity of intracellular SOD, GSH-Px increased; the content of MDA and ROS generation decreased; cell viability increased; mitochondrial membrane potential could be more stable and cell apoptosis decreased ( P<0. 01 ) . However, all these protective effects were attenuated significantly in the group pretreated with apigenin and Bcl-2 inhibitor ABT-737 . Conclusion The effect of apigenin against A/R injury in cardiomyo-cytes involves Bcl-2 pathway, and at least partly de-pends on its effect on upregulating the expression of Bcl-2 .

This study is to investigate the effect of Cordyceps sinensis and its cultured mycelia on growth and metabolism of Escherichia coli, and microcalorimetric method was carried out to evaluate its biological activity. The study will provide the basis for the quality control of Cordyceps sinensis. Experimental result will show the effect of natural Cordyceps sinensis and its cultured mycelia on growth and metabolism of Escherichia coli, with index of P(1max) and effective rate (E) by microcalorimetry, the data of experiment were studied by cluster analysis. The results showed that Cordyceps sinensis and its cultured mycelia not only can promote growth and metabolism of Escherichia coli but also can regulate the balance of intestinal microecology efficiently. When the concentrations of samples > 6.0 mg mL(-1), natural Cordyceps sinensis can promote the growth and metabolism of Escherichia coli efficiently (P < 0.05) compared with the control group, and have better dose-effect relationship with concentration (r > 0.9), its cultured mycelia does not show conspicuous auxoaction (P > 0.05) and have not dose-effect relationship with concentration (r < 0.6); when the concentration of samples < 6.0 mg mL(-1), all samples does not show conspicuous auxoaction (P > 0.05). Natural Cordyceps sinensis and its cultured mycelia can be distinguished by cluster analysis. Microcalorimetry has a good prospect on the quality evaluation of the traditional Chinese medicine.
Biological Products ; pharmacology ; Calorimetry ; methods ; Cordyceps ; Escherichia coli ; drug effects ; growth & development ; Microchemistry ; methods ; Mycelium

Objective To evaluate the clinical effect and efficacy of endoscopy treatment for isolated gastric varices 1 with tissue glue and metal clips. Metheds The clinical date of 21 patients who treated tissue glue and metal clips were retrospectively analyzed from Jan 2015 to Dec 2016. Results The treatments were completed successfully and reviewed by endoscopy after 1 week, 1 month, 3 months, 6 months. The gastric varices were reduced, and the serious complications of bleeding, embolism were little. Conclusion The endoscopy treatment for isolated gastric varices 1 with tissue glue and metal clips is contributed to clinical effect, and the treatment provides a reference for clinical treatment.

OBJECTIVETo assess the characteristics of enhanced magnetic resonance image with ultrasmall superparamagnetic iron oxide (USPIO) in the inflammatory and tumor metastatic rabbit model, and explore its relevance with histologic ultrastructural findings.

METHODSTotally 36 New Zealand white rabbits were randomly divided into lymphadenitis group and metastatic group. Complete Freund's adjuvant was injected into the bilateral dorsal footpads of 18 rabbits to set up ipsilateral lymphadenitis model. The other 18 rabbits received a subcutaneous implantation of VX2 tumor cell suspension (1.5 x 10(7) cells/ml) in both thighs to set up metastatic lymph node model. Magnetic resonance scan were performed 24 hours before and after USPIO (90 micromol Fe/kg) injection. T2 values of each lymph node were measured and lymph node T2 enhancement rate was calculated as well. HE staining, Prussian blue staining, and electronic microscopy were performed to observe the pathological microstructure changes and the distribution of the iron particle in lymph node. Relationship between lymph nodes USPIO enhancement and its microstructures were further analyzed. Results Thirty-six lymph nodes in lymphadenitis group showed different degrees of reactive hyperplasia. Twenty-six lymph nodes in metastatic group were invaded by tumor cell. Non-enhanced scan showed mild difference between T2 signal intensity of the two pathological lymph node types. After USPIO enhancement, inflammatory lymph nodes showed distinct T2 signal reduction at the center, and metastatic lymph nodes showed homogenous and faint T2 signal reduction. Enhancement rate of benign and malignant lymph nodes were 57.39% and 29.45% respectively (P < 0.01). HE staining and Prussian blue staining indicated USPIO particles located mainly in the macrophages at inflammatory lymphatic medulla, while paracortical area and cortical area contained relatively much less USPIO particles due to less macrophages distribution. MRI findings were correlated with the pathological results. Electronic microscopy also verified that the majority of USPIO particles were located in the numerous cytophagic bubbles of macrophages. Lymph nodes metastasis including 4 lymph nodes with completed structure destruction due to entire tumor infiltration, 19 lymph nodes with partially lymph node structure destruction but reduced USPIO-contained macrophage numbers or reduced USPIO particles in macrophages, and 3 lymph nodes with only localized foci tumor metastasis at subcapsular area. Conclusions USPIO enhancement pattern of different lymph nodes is closely related to distribution and functional status of the intra-node macrophages. It may affect the accuracy of the lymph node property diagnosis based on USPIO enhanced image.

Animals ; Dextrans ; metabolism ; Female ; Image Enhancement ; methods ; Lymph Nodes ; ultrastructure ; Lymphadenitis ; diagnosis ; pathology ; Lymphatic Metastasis ; diagnosis ; ultrastructure ; Magnetic Resonance Imaging ; methods ; Magnetics ; Magnetite Nanoparticles ; Male ; Nanoparticles ; Rabbits ; Random Allocation