During last decade, gold nanoparticled (AuNPs)-based assays have been well-developed and widely used in biological analysis and biomedical detection because AuNPs have unique physical and chemical properties which depend on the size, shape and degree of aggregation.The AuNPs-based assays have already been employed for detecting practical samples with high simplicity and selectivity.This review discusses the recently development of the synthesis and biological molecular functionalisation of AuNPs and their applications on the heavy metallic cations, small organic compounds, nucleic acids and proteins detection and cellular analysis.

A gold nanoparticle ( GNP)-based dynamic light scattering ( DLS) assay has been developed for detecting mercury ion ( Hg2+) in aqueous solution. The GNPs are able to maintain monodisperse state in relative high ionic strength ( 0. 1 mol/L NaCl ) aqueous solution because Hg2+ aptamer 5’-TTTCTTCTTTCTTCCCCCCTTGTTTGTTGTTT-3’( Probe DNA ) can adsorb on the GNP surface by electrostatic interaction. In the presence of Hg2+, the Probe DNA molecules easily desorb from GNP surface because of T-Hg2+-T formation. The unprotected GNPs form aggregates in 100 mmol/L NaCl solution, resulting in increased significantly the average hydrodynamic diameter of GNPs. Under the conditions of pH 7. 43, 110 nmol/L aptamer, 100 mmol/L NaCl and 30 minutes incubation time of Hg2+with aptamer, the difference of average hydrodynamic diameter (△D ) of GNPs was increased linearly with logarithm of Hg2+concentration over the range from 0. 1 nmol/L to 5 μmol/L, with a detection limit of 0. 1 nmol/L. Moreover, satisfactory results were obtained when the proposed method was applied to detect Hg2+ in real samples.

Sepsis leads to inhibition of protein synthesis , known as leucine resistance .mTOR regulates protein synthesis by phosphorylation of S6K1 and 4E-BP1.AMPK is an important negative regulator of mTOR and its activity is in an abnormal state in sep-sis.This review briefly discusses the AMPK/mTOR pathway in Sepsis-induced leucine resistance .

Objective To explore the method of repairing skin defects in the foot, the ankle and the lower one-third of the lower leg with anterolateral island flaps of the lower leg formed by isolating peroneal artery from the anterior interosseous membrane of the lower leg. Methods 46 adult cadavers' lower legs were anatomized, to observe the blood supply of the anterolateral skin, the lateral anterior malleolar artery anastomoses with anterior perforating branches of the peroneal artery, and the relationship between peroneal vessels and interosseous membrane of the lower legs. Clinically, 8 cases(7 males, 1 female, age ranged from 7 to 48 years) of skin defects of the feet, the ankles and the lower one-third of the lower legs were repaired with anterolateral island flaps of the lower leg by isolating the peroneal vessels from the anterior interosseous membrane of the lower legs from June 1996 to August 2004. The flaps were cut into sizes between 7 cm ? 4 cm and 23 cm ? 12 cm. Results Averaged 3.2 anterior branches stem from the lower one-third of the peroneal artery, extend through the foremina in the interosseous membrane, pass the anterior intermuscular septum of the lower leg, arrive and provide nutrition to the anterolateral skin of the lower leg. The lateral anterior malleolar artery anastomosed with the lowest perforating branch of the peroneal artery to form the lateral malleolar artery arch. The peroneal vessels easily isolated after incision of the interosseous membrane of the lower leg. Eight cases were performed on transposition of the anterolateral island flaps with the artery pedicles of the lower leg. All the patients were followed up from 1 to 8 years, with a mean of 3 years. Only 1 case was necrosis at the distal one-third of the flap. The others totally survived without diabrosis and swelling. The ankle and phalanges had normal movement. The color and texture of the flaps were excellent. The sensation of flaps recovered in 4 cases by suture superficial peroneal nerve. All cases suffered hypoesthesia at the 3rd and 4th toe web. Conclusion Isolating peroneal artery and vein from the anterior interosseous membrane of the lower leg proved easy to perform. Peroneal artery are not main blood vessels and the excision of them affects blood supply to the foot insignificantly. The skin flaps thus formed are ideal for repairing skin defects of the foot, the ankle and the lower one-third of the lower leg.

To investigate the distribution of IS605 in Helicobacter pylori(Hp) isolated from Chinese patients, and its relationship to gastroduodenal diseases. The fragment in IS605 was amplified by polymerase chain reaction(PCR) in 107 Hp strains from Chinese patients. Results: The amplicom to IS605 was positive in 47 strains. Detective rates of IS605 in Hp from duodenal ulcer (13.6%) were lower than that from gastritis(52.2%). It suggested that: the detection of IS605 was related to alternation in virulence of Hp.

A peptide microarray-based fluorescence and resonance light scattering ( RLS ) two readout assay was developed for screening thrombin inhibitors in blood samples. In this assay, the biotinylated peptide microarray was used as the platform. The peptide C-terminal fragments carried biotin sites departed from the slide when the biotinylated peptides were digested by thrombin hydrolysis reaction. The hydrolysis progress was labeled by fluorescence and 30 nm peptide-stabilized gold nanoparticles through the biotin-avidin reaction. In the presence of thrombin inhibitors, the hydrolysis reactions were blocked, and the inhibition capability of inhibitors could be detected by the fluorescent and RLS signal changes. The order of the half maximal inhibitory concentration ( IC50 ) of thrombin inhibitors in pure thrombin solution and spiked human serum were argatrobanHAT-Ⅲ>trypsin inhibitor>E-64>AEBSF. The reversible or irreversible characters of argatroban and HAT-Ⅲ had been estimated in human plasma. Compared with the experimental data of fluorescent and RLS assay in blood sample, the RLS assay labeled by 30 nm gold nanoparticles are more suitable for the inhibitor detection in complicated blood sample.

OBJECTIVETo investigate the effect of reverse saphenous nerve neurocutaneous flaps for skin defects of forefoot.

METHODSIn the anatomic study, 50 cadaveric feet were injected with red latex and the anastomosis, distribution and external diameters of medialtarsal artery, medial anterior malleolus artery, medial plantar artery, the superficial branch of the medial basal hallucal artery and saphenousnerve nutritional vessels were observed. Based on anatomic research results, we designed the reverse saphenous nerve neurocutaneous flaps for repairing skin defects of forefoot.

RESULTSThe blood supply of reverse saphenous nerve neurocutaneous flaps were based on the vasoganglion, which consist of arterial arch at the superior border of abductor hallucis and arterial network on the surface of abductor hallucis around the saphenous nerve and medial pedis flap. From Oct. 2006 to Oct. 2011, the reverse saphenous nerve neurocutaneous flaps were used to repair skin defects of forefoot in 11 cases. The flap size ranged from 2.5 cm x 3.5 cm to 7.5 cm x 8.5 cm. The wounds at donor site were covered with full-thickness skin graft. All flaps survived completely with no ulcer at the donor site. 11 cases were followed up for 6 to 18 months( mean, 10 months). The skin color and texture were satisfactory. The patients could walk very well.

CONCLUSIONSIt is reliable to repair the skin defects of forefoot with reverse saphenous nerve neurocutaneous flaps. It is easily performed with less morbidity. This flap should be considered as a preferential way to reconstruct skin defects of forefoot.

Arteries ; anatomy & histology ; Cadaver ; Female ; Foot ; blood supply ; innervation ; Forefoot, Human ; injuries ; surgery ; Humans ; Male ; Muscle, Skeletal ; anatomy & histology ; Reconstructive Surgical Procedures ; Skin Transplantation ; methods ; Surgical Flaps ; blood supply ; innervation ; Transplant Donor Site ; surgery

Objective To observe the effects of limited fluid resuscitation (LFR) on immune function and inflammatory mediators in patients with multiple bone fracturescomplicated with traumatic hemorrhagic shock. Methods One hundred and two patients with multiple bone fractures complicated with traumatic hemorrhagic shock admitted to the Affiliated Hospital of Medical College of Ningbo University from January 2014 to June 2016 were enrolled, and they were divided into a LFR group and a early sufficient routine fluid resuscitation (RFR) group by random number table, each group 51 cases. After admission, the patients in the two groups underwent bandaging and hemostasis at the traumatic sites and preoperative management was prepared. The patients in RFR group were treated with early sufficient RFR, while LFR group was treated with LFR. The changes of hematocrit (HCT), blood platelet count (PLT), prothrombin time (PT), blood lactic acid and immune cells, inflammatory mediators and micro RNA-155 (miR-155) were observed in patients of the two groups at 4 hours after resuscitation.Results Compared with RFR group, the resuscitation time (hours: 3.67±1.45 vs. 5.14±1.61), levels of PT (s: 11.43±2.21 vs. 15.73±2.52), serum lactic acid (mmol/L: 3.35±0.15 vs. 3.81±0.25), tumour necrosis factor-α [TNF-α (ng/L): 14.10±3.39 vs. 16.28±3.47], interleukin [IL-10 (ng/L): 31.43±10.51 vs. 40.09±13.23, IL-6 (ng/L): 490.10±55.13 vs. 610.30±63.15] and endothelin-1 [ET-1 (pg/L): 183.35±30.51 vs. 250.01±31.23] in LFR group were significantly decreased (allP < 0.01), while PLT (×109/L: 134.58±28.13 vs. 108.12±30.35), HCT (×10-2: 0.34±0.04 vs. 0.24±0.05), miR-155 (0.15±0.02 vs. 0.08±0.02) and CD4+CD25+ regulatory T cell [CD4+CD25+Treg (×10-2): 2.28±0.47 vs. 2.10±0.39] in LFR group were obviously increased (allP < 0.01).Conclusions Using LFR in the emergency treatment of patients with multiple bone fractures complicated with traumatic hemorrhagic shock can effectively shorten the resuscitation time, regulate the patients' coagulation function, reduce the unnecessary excessive liquid infusion, improve immune status and decrease the degree of inflammatory reaction.

Objective To investigate the prevention and management of perioperative complications of intertrochanteric fractures in elderly in-hospital patients(aged≥80 years).Methods Clinical data of 103 intertrochanteric fracture patients(31 male and 72 female)undergoing surgical treatment at our hospital from May 2010 to Nov.2015 were retrospectively analyzed.Their ages ranged from 80 to 99 years,with an average of 86.2 years.There were 3 Evan type Ⅰ cases,25 type Ⅱ cases,36 type Ⅲ cases,37 type Ⅳ cases and 2 type V cases.Of these,82 received epidural anesthesia and 21 had general anesthesia.Intertrochanteric fractures were treated with proximal femoral nail(PFN) internal fixation in 101 patients and dynamic hip screw(DHS)internal fixation in 2 patients.Results The average operation duration and blood loss were 30 min and 60 ml in the PFN internal fixation group and 60 min and 150 ml in the DHS internal fixation group,respectively.The average hospitalization time was 16.7 days.One patient (0.9％) died after operation,10 (9.7％) had preoperative complications of bed rest with 3 cases involving the central nervous system and 4 cases involving the respiratory system,and 38 cases (36.9％)had postoperative complications with 13 involving the central nervous system.The average time from admission to operation was 6 days,with 65 cases above the average and 38 cases below the average,and there was a statistically significant difference in the incidence of postoperative complications between the two subgroups(30/65 or 46.2 ％for the former and 8/38 or 21.1％ for the latter,x2＝6.49,P＜0.05).Conclusions Elderly patients with intertrochanteric fractures should undergo surgery as soon as possible,preferably with epidural anesthesia.Proficiency in surgical kills,short operation time,close monitoring of preoperative and postoperative conditions,and proper and timely treatment are the key to ensuring surgical success.

A new type of piezoelectric oscillation-based non-contact spotting mode has been developed to overcome the disadvantages of traditional non-contact spotting modes including complicated operation procedure, cleaning difficulty of spotting needle, large sample consumption of electromagnetic microvalve and high spotting cost of piezoelectric inkjet based non-contact spotting mode. In the device, the capillary spotting needle and the piezoelectric driving device are two independent units used for replacing and cleaning capillary spotting needle. The glass capillary spotting needle is prepared by the laser melting method with adjustable diameter and low cost. The sample spotting volume of the device can be easily adjusted in the range of 10Symbolm_10-10Symbolm_9 by changing the amplitude and frequency of piezoelectric ceramic. A microarray spotting system is developed by the combination of the piezoelectric oscillation-based non-contact spotting mode and three dimensional precision displacement control technology. The multiple parameters of as-prepared microarray spotting system have been tested including spotting volume, density of spot and spotting precision. The experimental results indicate that the minimum volume of single spot with 320 pL and the highest density of spot with 4000 spots/cm2 can be achieved by the as-prepared microarray spotting system. Furthermore, the as-prepared microarray spotting system can also be employed to fabricate patterned interface.