MOF-Derived Zn/N-Doped Porous Carbon Film on a Carbon Nanotube for High-Performance Supercapacitors.

Designing high-performance binder-free electrochemical electrodes is crucially important toward supercapacitors. In this paper, a Zn/N-doped porous carbon film coating on flexible carbon nanotubes (ZIF-8@CT-800) derived from the epitaxial Zn-MOF film growth on cotton textile was successfully fabricated via a combination of the liquid-phase epitaxial (LPE) method and calcination treatments. The ZIF-8@CT-800 serves directly as a self-supported electrode for supercapacitors and exhibits a high areal capacitance of 930 mF·cm-2 at a current density of 1 mA·cm-2 and a good recyclability of 86% after 2000 cycles. The excellent supercapacitor property is ascribed to the unique structural design of ZIF-8@CT-800, which provides appropriate channels for enhanced electronic and ionic transport as well as increased surface area for accessing more electrolyte ions. This work will provide significant guidance for designing MOF-derived porous carbon to construct flexible binder-free electrode materials with high electrochemical performance.

A fatal case of Exophiala dermatitidis meningoencephalitis in an immunocompetent host: A case report and literature review.

BACKGROUND: Central nervous system (CNS) infection due to Exophiala dermatitidis is rare and fatal, and primarily reported in immunocompromised patients or those with caspase recruitment domain-containing protein 9 deficiency. Herein, we describe a case of an otherwise healthy person (without underlying disease or gene deficiency) diagnosed with Exophiala dermatitidis meningoencephalitis. The patient achieved clinical remission under high-dose antifungal therapy in the first 14 months but died after 2 years of the therapy. CASE PRESENTATION: A 15-year-old student with headache and fever was admitted to our department. Lumbar puncture showed increased cerebrospinal fluid (CSF) pressure, moderately high CSF protein levels and cell counts, and a remarkable decrease in CSF glucose and chloride. Magnetic resonance imaging of the brain revealed multiple lesions and cerebral pia mater enhancement. CSF culture confirmed E. dermatitidis infection. We administered 4-week antifungal therapy of amphotericin B, but his CSF culture remained positive. After receiving the 12-week standard dose of voriconazole (200 mg q12h), the patient's CSF culture became negative, but his condition deteriorated with intracranial lesion enlargement. We administered a high-dose voriconazole therapy (600-800 mg per day) for 12 months, which led to clinical remission. The voriconazole dose was reduced due to adverse effects including hepatic dysfunction and hypokalemia, and the disease progressed with high intracranial pressure and epileptic seizures. CONCLUSIONS: CNS infection caused by E. dermatitidis is fatal and the most serious form of fungal infection. Initially, high-dose and long-term antifungal therapy could be effective. Gene defect and related antifungal immunodeficiency may be the most important pathogenic and lethal factor.

Epidemiological, clinical and virological characteristics of 74 cases of coronavirus-infected disease 2019 (COVID-19) with gastrointestinal symptoms.

OBJECTIVE: The SARS-CoV-2-infected disease (COVID-19) outbreak is a major threat to human beings. Previous studies mainly focused on Wuhan and typical symptoms. We analysed 74 confirmed COVID-19 cases with GI symptoms in the Zhejiang province to determine epidemiological, clinical and virological characteristics. DESIGN: COVID-19 hospital patients were admitted in the Zhejiang province from 17 January 2020 to 8 February 2020. Epidemiological, demographic, clinical, laboratory, management and outcome data of patients with GI symptoms were analysed using multivariate analysis for risk of severe/critical type. Bioinformatics were used to analyse features of SARS-CoV-2 from Zhejiang province. RESULTS: Among enrolled 651 patients, 74 (11.4%) presented with at least one GI symptom (nausea, vomiting or diarrhoea), average age of 46.14 years, 4-day incubation period and 10.8% had pre-existing liver disease. Of patients with COVID-19 with GI symptoms, 17 (22.97%) and 23 (31.08%) had severe/critical types and family clustering, respectively, significantly higher than those without GI symptoms, 47 (8.14%) and 118 (20.45%). Of patients with COVID-19 with GI symptoms, 29 (39.19%), 23 (31.08%), 8 (10.81%) and 16 (21.62%) had significantly higher rates of fever >38.5°C, fatigue, shortness of breath and headache, respectively. Low-dose glucocorticoids and antibiotics were administered to 14.86% and 41.89% of patients, respectively. Sputum production and increased lactate dehydrogenase/glucose levels were risk factors for severe/critical type. Bioinformatics showed sequence mutation of SARS-CoV-2 with m6A methylation and changed binding capacity with ACE2. CONCLUSION: We report COVID-19 cases with GI symptoms with novel features outside Wuhan. Attention to patients with COVID-19 with non-classic symptoms should increase to protect health providers.

Liver Enzyme Elevation in Coronavirus Disease 2019: A Multicenter, Retrospective, Cross-Sectional Study.

INTRODUCTION: Elevated liver enzyme levels are observed in patients with coronavirus disease 2019 (COVID-19); however, these features have not been characterized. METHODS: Hospitalized patients with COVID-19 in Zhejiang Province, China, from January 17 to February 12, 2020, were enrolled. Liver enzyme level elevation was defined as alanine aminotransferase level >35 U/L for men and 25 U/L for women at admission. Patients with normal alanine aminotransferase levels were included in the control group. Reverse transcription polymerase chain reaction was used to confirm severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, and patients symptomatic with SARS-CoV-2 infection were defined as patients with COVID-19. Epidemiological, demographic, clinical, laboratory, treatment, and outcome data were collected and compared. RESULTS: Of 788 patients with COVID-19, 222 (28.2%) patients had elevated liver enzyme levels (median [interquartile range {IQR}] age, 47.0 [35.0-55.0] years; 40.5% women). Being male, overweight, and smoking increased the risk of liver enzyme level elevation. The liver enzyme level elevation group had lesser pharyngalgia and more diarrhea than the control group. The median time from illness onset to admission was 3 days for liver enzyme level elevation groups (IQR, 2-6), whereas the median hospitalization time for 86 (38.7%) discharged patients was 13 days (IQR, 11-16). No differences in disease severity and clinical outcomes were noted between the groups. DISCUSSION: We found that 28.2% of patients with COVID-19 presented with elevated liver enzyme levels on admission, which could partially be related to SARS-CoV-2 infection. Male patients had a higher risk of liver enzyme level elevation. With early medical intervention, liver enzyme level elevation did not worsen the outcomes of patients with COVID-19.

Serum chitinase-3-like protein 1 is a biomarker of liver fibrosis in patients with chronic hepatitis B in China.

BACKGROUND: Serum chitinase-3-like protein 1 (CHI3L1) is a potential biomarker for fibrosis assessment. We aimed to evaluate serum CHI3L1 as a noninvasive diagnostic marker for chronic hepatitis B virus-related fibrosis. METHODS: Serum CHI3L1 levels were measured by ELISA in 134 chronic hepatitis B (CHB) patients. Significant fibrosis was defined as a liver stiffness > 9.7 kPa. The performance of CHI3L1 was assessed and compared to that of other noninvasive tests by receiver operating characteristic (ROC) analysis. RESULTS: Serum CHI3L1 levels were significantly higher in CHB patients with significant hepatic fibrosis (≥ F2, 81.9 ng/mL) than in those without significant hepatic fibrosis (< F2, 56.5 ng/mL) (P < 0.001). In CHB patients, the specificity and sensitivity of CHI3L1 for predicting significant fibrosis were 75.6% and 59.1%, respectively, with a cut-off of 76.0 ng/mL and an area under the ROC curve of 0.728 (95% CI: 0.637-0.820). CONCLUSIONS: Serum CHI3L1 levels could be an effective new serological biomarker for the diagnosis of liver. Moreover, CHI3L1 is feasible in monitoring disease progression.

Scale-up laccase production from Trametes versicolor stimulated by vanillic acid.

An efficient strategy for laccase production in Trametes versicolor cultures was developed using vanillic acid as the inducer. The optimized vanillic acid treatment strategy consisted of exposing 2-day-old mycelia cultures to 80 mg/L vanillic acid. After 4 days, laccase activity of 588.84 U/L was achieved in flasks which represented a 1.79-fold increase compared to the control. In 200-L airlift bioreactor, the maximal laccase activity reached up to 785.12 U/L using the optimized vanillic acid treatment strategy. The zymograms of culture supernatants revealed three bands with laccase activity, among which Lac1 and Lac2 were abundant laccase isoforms constitutively expressed, and Lac3 was an inducible isozyme by vanillic acid. The results of real-time quantitative PCR showed that the transcription level of lcc in T. versicolor cultures grown with vanillic acid for 7 days was about 5.64-fold greater than that without vanillic acid in flasks. In 200-L airlift bioreactor cultures of T. versicolor with addition of vanillic acid, the transcript level of lcc at day 7 was 2.62-fold higher than that in flasks with vanillic acid due to the good mass transfer and oxygen supply in the bioreactor system. This study provides a basis for understanding the induction mechanism of vanillic acid for laccase production and has good potential for industrial applications.

Development of an efficient process intensification strategy for enhancing Pfu DNA polymerase production in recombinant Escherichia coli.

An efficient induction strategy that consisted of multiple additions of small doses of isopropyl-ß-D-thiogalactopyranoside (IPTG) in the early cell growth phase was developed for enhancing Pfu DNA polymerase production in Escherichia coli. In comparison to the most commonly used method of a single induction of 1 mM IPTG, the promising induction strategy resulted in an increase in the Pfu activity of 13.5% in shake flasks, while simultaneously decreasing the dose of IPTG by nearly half. An analysis of the intracellular IPTG concentrations indicated that the cells need to maintain an optimum intracellular IPTG concentration after 6 h for efficient Pfu DNA polymerase production. A significant increase in the Pfu DNA polymerase activity of 31.5% under the controlled dissolved oxygen concentration of 30% in a 5 L fermentor was achieved using the multiple IPTG induction strategy in comparison with the single IPTG induction. The induction strategy using multiple inputs of IPTG also avoided over accumulation of IPTG and reduced the cost of Pfu DNA polymerase production.

Analysis of the improved mechanism of Rhodobacter sphaeroides VK-2-3 coenzyme Q10 by reverse metabolic engineering.

Coenzyme Q10 (CoQ10) is an essential medicinal ingredient. In this study, we obtained a high-yielding mutant strain of CoQ10, VK-2-3, by subjecting R. sphaeroides V-0 (V-0) to a 12C6+ heavy ion beam and high-voltage prick electric field treatment. To investigate the mutation mechanism, the complete genomes of VK-2-3 and V-0 were sequenced. Collinearity analysis revealed that the nicotinamide adenine dinucleotide-dependent dehydrogenase (NAD) gene underwent rearrangement in the VK-2-3 genome. The NAD gene was overexpressed and silenced in V-0, and this construct was named RS.NAD and RS.ΔNAD. The results showed that the titers of CoQ10 in the RS.NAD and RS.ΔNAD increased and decreased by 16.00 and 33.92%, respectively, compared to those in V-0, and these differences were significant. Our results revealed the mechanism by which the VK-2-3 CoQ10 yield increases through reverse metabolic engineering, providing insights for genetic breeding and mechanistic analysis.

[Research on rules of distribution and development of traditional Chinese medicine syndromes of 2,237 HIV/AIDS cases].

HIV/AIDS patients in high prevalence areas with different routes of infection (sexually transmitted 878 cases, 527 cases of intravenous drug user, paid blood donor 652 cases) were choosen for traditional Chinese medicine (TCM) syndrome investigation for one-year clinical follow-up. This paper primarily concluded the nature, location and pathogenesis of AIDS diseases. Deficiency of Yang and Yin, combining deficiency of Qi are the basic deficiency syndromes, while stagnation of dampness, toxic fire are the excess syndromes; the disease location of HIV infector is spleen, main syndrome is deficiency of spleen Qi; the disease location of AIDS patient is kidney, main syndrome is deficiency of spleen and kidney Yang. The pathogenic development tendency is from deficiency of Qi to combining stagnation of dampness and toxic fire, finally to deficiency of Qi and Yin, deficiency of Yang.

[Vertical Migration Characteristics and Fate of Heavy Metals from Zinc Smelting Slag in Soil Profile].

To investigate the influence of heavy metals in smelting waste residue on the quality of soil and groundwater, a simulation column experiment was conducted to study the migration characteristics of heavy metals from the leaching solution of zinc volatilizing kiln residue in the site soil profile under continuous or intermittent leaching for 90 days. The concentrations of Cd, Cu, Pb, and Zn in leachate and their accumulation, chemical fractions, and particle size distribution characteristics in the soil profile were analyzed, and the retention mechanism of heavy metals was also discussed. The results showed that the concentration of heavy metals in the soil column leachate decreased rapidly after reaching the peak at the earlier leaching stage, and the Cd concentration far exceeded the threshold limit of 0.1 mg·L-1(class Ⅳ) of the Quality Standard for Groundwater(GB/T 14848-2017), indicating that there was Cd pollution risk of groundwater. The soil profile had a great adsorption capacity for heavy metals in the waste residue. Cd, Cu, Pb, and Zn were predominately accumulated in the shallow soil depth(0-10 cm), which was 237-429, 1.25-16.2, 1.38-2.31, and 1.79-3.17 times of the content of corresponding heavy metals in the soil profile before leaching, respectively. The migration distance of heavy metals in the slag under continuous leaching was longer than that under intermittent leaching, and Cd was significantly accumulated in the deep layer of the soil column. The contribution of soil coarse particles(0.5-2.0 mm) to the total cumulative amount of Cd, Cu, and Zn was larger, whereas Pb was more prone to accumulate in the particle size of<0.25 mm. The results of BCR sequential extraction fraction showed that the accumulated Cd, Cu, and Zn in shallow soil depth were mainly present in the weak acid extraction, accounting for 62.4%-76.7%, 72.0%-95.8%, and 67.6%-85.8% of total content, respectively. The X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR) analysis showed that exogenous heavy metals in slag entering the soil would not form a stable mineral phase within 90 days, and the soil hydroxyl(-OH) and carbonyl(C=O) functional groups and iron aluminum silicate oxides were the main retention factors.

Isolation and Screening of High-Yielding α-Amylase Mutants of Bacillus subtilis by Heavy Ion Mutagenesis.

To improve fermentative production of α-amylase, heavy-ion mutagenesis technology was used to irradiate Bacillus subtilis (B. subtilis) to obtain the high yielding mutants in this study. After continuous cultivation for 12 generations, eight mutants exhibited positive mutation rate with greater H/C. The α-amylase production was stable and obviously exceeded that by the parent strain, which shows that the mutants have a good genetic stability. Among the mutants, the α-amylase activity of B. subtilis KC-180-2 was 72.26 U·mL-1, which was 82.34% higher than that of the original strain. After optimization of fermentation conditions and media, the α-amylase activity of B. subtilis KC-180-2 reached a maximum of 156.83 U·mL-1 at 36 h in a bioreactor. In addition, the optimized fermentation temperature of B. subtilis KC-180-2 was increased to 49℃, indicating B. subtilis KC-180-2 possesses high-temperature resistance, which has great application prospects for industrial fermentation for α-amylase production.

[Therapeutic complications of posterior vertebral column resection for spinal tumors].

OBJECTIVE: To summarize and analyze the complications of posterior vertebral column resection in the treatment of spinal tumors. METHODS: The complications of 31 patients were recorded and categorized into primary and secondary complications. Many factors such as segment, bleeding volume and surgical duration were reviewed. The SPSS 12.0 software was used to analyze the relations between the complications and these factors retrospectively. RESULTS: Two primary and 30 secondary complications were identified. A definite relation existed between the delayed removal of endotracheal intubation and bleeding volume. And a definite relation existed also between transient thrombocytopenia and operative duration. There was no relation between prosthetic subsidence and various factors (including follow-up period). CONCLUSION: Most complications are secondary and have basically no effect on the recovery of patients. And prevention are feasible in most cases. So a thorough plan should be devised to prevent the occurrences of potential complications, especially primary ones. For any occurrence, active treatment should be offered to improve the surgical safety.

Overexpression of enzymes in glycolysis and energy metabolic pathways to enhance coenzyme Q10 production in Rhodobacter sphaeroides VK-2-3.

We subjected the components of the glycolysis and energy metabolism pathways of Rhodobacter sphaeroides (R. sphaeroides) to metabolic engineering to improve the titer and yield of coenzyme Q10 (CoQ10). Phosphofructokinase (PFK), cyclic adenylate-dependent protein kinase (PKAC), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and adenosine triphosphate hydrolase (KdpC) were overexpressed in R. sphaeroides VK-2-3 (VK-2-3). The strains were labeled R. sphaeroides PFK (RS.PFK), RS.PKAC, RS.PFK-PKAC, RS.KdpC, RS.GAPDH, and RS.KdpC-GAPDH. Results showed that the CoQ10 titers of RS.PFK, RS.PKAC, and RS.PFK-PKAC were 300.96 ± 0.87, 405.94 ± 4.77, and 379.94 ± 0.42 mg/l, respectively. The CoQ10 titers of RS.PFK and VK-2-3 were not significantly different; however, those for RS.PKAC and RS.PFK-PKAC were 13 and 6% higher than that of VK-2-3, respectively. Further, the titers of RS.KdpC, RS.GAPDH, and RS.KdpC-GAPDH were 360.17 ± 0.39, 409.79 ± 0.76, and 359.87 ± 1.14 mg/l, respectively. The titers of RS.KdpC and RS.KdpC-GAPDH were not significantly different from that for VK-2-3, whereas that for RS.GAPDH was 14% higher than that of VK-2-3. Finally, when the cultures of RS.GAPDH and VK-2-3 were scaled up in 5-L fermenters, the CoQ10 titers and RS.GAPDH yields increased by 44.3 and 37.8%, respectively, compared with VK-2-3.To the best of our knowledge, the glycolysis pathway of R. sphaeroides was studied for the first time in this study. We genetically modified the components of the energy metabolism pathway to obtain the strain with high yield of CoQ10 mutant RS.GAPDH. The findings of this study can serve as a basis for future studies involving metabolic engineering of CoQ10-producing strains.

Surgical timing for primary encapsulating peritoneal sclerosis: A case report and review of literature.

BACKGROUND: Primary encapsulating peritoneal sclerosis (EPS) is a rare but devastating disease that causes fibrocollagenous cocoon-like encapsulation of the bowel, resulting in bowel obstruction. The pathogenesis, prevention, and treatment strategies of EPS remain unclear so far. Since most patients are diagnosed during exploratory laparotomy, for the non-surgically diagnosed patients with primary EPS, the surgical timing is also uncertain. CASE SUMMARY: A 44-year-old female patient was referred to our center on September 6, 2021, with complaints of abdominal distention and bilious vomiting for 2 d. Physical examination revealed that the vital signs were stable, and the abdomen was slightly distended. Computerized tomography scan showed a conglomerate of multiple intestinal loops encapsulated in a thick sac-like membrane, which was surrounded by abdominal ascites. The patient was diagnosed with idiopathic EPS. Recovery was observed after abdominal paracentesis, and the patient was discharged on September 13 after the resumption of a normal diet. This case raised a question: When should an exploratory laparotomy be performed on patients who are non-surgically diagnosed with EPS. As a result, we conducted a review of the literature on the clinical manifestations, intraoperative findings, surgical methods, and therapeutic effects of EPS. CONCLUSION: Recurrent intestinal obstructions and abdominal mass combined with the imaging of encapsulated bowel are helpful in diagnosing idiopathic EPS. Small intestinal resection should be avoided.

Case report: Quadruple primary malignant neoplasms including esophageal, ureteral, and lung in an elderly male.

Multiple primary malignant neoplasms (MPMNs) are defined as multiple tumors with different pathogenic origins. MPMNs are rare, but the morbidity rate is on the rise. With the development of anti-tumor treatments, such as targeted therapy and immunotherapy, the overall survival of cancer patients has been significantly prolonged, leading to an increased number of patients with MPMNs. A crucial aspect of MPMNs management is deciding how to schedule further treatments according to individual tumor risk. This process involves a multidisciplinary physician team to ensure favorable outcomes. Herein we report a 60-year-old male who developed four different malignancies, including esophageal squamous cell carcinoma, upper urinary tract urothelial carcinoma, mediastinal small cell lung cancer, and left lung squamous cell carcinoma over 20 years and received appropriate treatment of each cancer with long survival.

[Enrichment and screening of the microsatellite markers in Microtus fortis and its preliminary application in genetic diversity research].

This study was to isolate microsatellite markers from Microtus fortis genome by magnetic beads enrichments. Through hybridization of biotin-labeled microsatellite oligonucleotide probes, which were captured by streptavidin-coated magnetic with the adaptor-ligated enzyme-digested genome fragments, single-stranded DNA fragments containing microsatellites were obtained. After PCR amplification, these fragments were then cloned into T vectors and were transformed into competent cells subsequently. Ninety-two microsatellite sequences were randomly isolated from 70 positive clones. Twenty-one out of 27 pairs of designed microsatellite primers were screened out from the microsatellite sequences, and 10 out of the 21 microsatellite loci were used to investigate the genetic diversity of three populations of M. fortis, Hunan (wild), Hunan (domesticated), and Ningxia (domesticated). All the 10 microsatellite loci used to analyze the genetic diversity exhibited a good level of polymorphism. The values of observed number of alleles (Na), effective number of alleles (Ne), observed heterozygosity (Ho), expected heterozygosity (He) and polymorphic information content (PIC) were all the highest in the Hunan (wild) population, lower in the Hunan (domesticated) population, and the lowest in the Ningxia (domesticated) population.

[Expression of chondromodulin-1 in the adult degenerative intervertebral disc].

OBJECTIVES: To investigate the expression of chondromodulin-1 (ChM-I) in human adult degenerative intervertebral disc (IVD) cells and the relationship between ChM-I expression and disc degeneration. METHODS: Three degenerated disc specimens obtained from patients in the treatment of disc degenerative disease from March to April 2009 were used for cell culture. ChM-I expression in IVD cells was examined by RT-PCR and Western blot. The effect of basic fibroblast growth factor (bFGF) on the expression of ChM-I was assessed by real-time PCR and Western blot. From October 2008 to October 2009, 26 human IVD tissues were obtained from patients in the surgical treatment of disc degenerative disease at different stage of degeneration according to MRI. Six IVD tissues removed from patients with metastatic spinal tumor were used as normal control. The expression of ChM-I determined by immunohistochemical analysis was correlated with MRI degeneration grade. RESULTS: RT-PCR and Western blot examination showed that ChM-I was expressed in both adult degenerative anulus fibrosus and nucleus pulposus cells. The mRNA and protein expression of ChM-I were both down-regulated by administration of bFGF with dose-dependent way (P < 0.05). Immunohistochemical analysis showed the percent of ChM-I immunopositive cells in the control group was 0.12 ± 0.03, and the number increased significantly in the advanced degeneration group (P < 0.05). CONCLUSIONS: The current results demonstrate that IVD cells express ChM-I. Administration of bFGF down-regulates the expression of ChM-I. The expression of ChM-I is correlated with the degree of IVD degeneration which means it may involve in the process of IVD degeneration.

Phosphoglycerate kinase 1 silencing by a novel microRNA microRNA-4523 protects human osteoblasts from dexamethasone through activation of Nrf2 signaling cascade.

Nuclear-factor-E2-related factor 2 (Nrf2) cascade activation can ameliorate dexamethasone (DEX)-induced oxidative injury and death in human osteoblasts. Phosphoglycerate kinase 1 (PGK1) depletion is shown to efficiently activate Nrf2 signaling by inducing methylglyoxal modification of Kelch-like ECH-associated protein 1 (Keap1). We here identified a novel PGK1-targeting microRNA: microRNA-4523 (miR-4523). RNA fluorescent in situ hybridization, RNA pull-down, and Argonaute-2 RNA immunoprecipitation results confirmed a direct binding between miR-4523 and PGK1 mRNA in primary human osteoblasts and hFOB1.19 osteoblastic cells. Forced overexpression of miR-4523, using a lentiviral construct, robustly decreased PGK1 3'-UTR (untranslated region) luciferase activity and downregulated its expression in human osteoblasts and hFOB1.19 cells. Furthermore, miR-4523 overexpression activated the Nrf2 signaling cascade, causing Keap1-Nrf2 disassociation, Nrf2 protein stabilization, and its nuclear translocation as well as transcription activation of Nrf2-dependent genes (NQO1, GCLC, and HO1) in human osteoblasts. By expressing a UTR-null PGK1 construct, miR-4523 overexpression-induced Nrf2 cascade activation was however largely inhibited. Importantly, DEX-induced reactive oxygen species production, oxidative injury, and cell apoptosis were significantly attenuated by miR-4523 overexpression in human osteoblasts and hFOB1.19 cells. Such actions by miR-4523 were abolished by Nrf2 shRNA or knockout, but mimicked by PGK1 knockout (using CRISPR/Cas9 method). In PGK1 knockout human osteoblasts, miR-4523 overexpression failed to further increase Nrf2 cascade activation and offer osteoblast cytoprotection against DEX. Significantly, miR-4523 is downregulated in human necrotic femoral head tissues of DEX-taking patients. Together, PGK1 silencing by miR-4523 protected human osteoblasts from DEX through activation of the Nrf2 signaling cascade.

Multi-functional thermosensitive composite microspheres with high magnetic susceptibility based on magnetite colloidal nanoparticle clusters.

Monodisperse organic/inorganic composite microspheres with well-defined structure were prepared through the encapsulation of silica coated superparamagnetic magnetite colloidal nanoparticle clusters (CNCs) with cross-linked poly(N-isopropylacrylamide) (PNIPAM) shell. At first, the sub-micrometer-sized CNCs were fabricated by the solvothermal process, and then a silica layer was coated on the surface of CNCs through a sol-gel process, and finally, a thermoresponsive shell of PNIPAM was deposited onto the surface of the core/shell magnetic microspheres by a precipitation polymerization. The experimental results showed that the size of Fe(3)O(4) core, the thickness of SiO(2) shell, as well as volume phase transition temperature (VPTT) of PNIPAM shell could be well controlled, and this structured modulation could satisfy different requirements. The superparamagnetic behavior, high magnetization (the saturation magnetization of Fe(3)O(4)/SiO(2)/PNIPAM microspheres with a 10% cross-linking density is 41.6 emu/g), and good thermosensitivity make these composite microspheres an ideal candidate for various important applications such as in controlled drug delivery, bioseparation, and catalysis.

Impact of human leukocyte antigen matching on hepatitis B virus recurrence after liver transplantation.

BACKGROUND: Liver transplantation (LT) is an effective therapy for end-stage hepatitis B virus (HBV) infection. Recurrence of HBV is one of the frequent complications. In the present study, we investigated whether human leukocyte antigen (HLA) matching influences the incidence of HBV recurrence, and the time point of HBV recurrence after LT. METHODS: One hundred and two recipients of LT with end-stage chronic HBV infection were reviewed. The triple-drug immunosuppression regimen consisted of tacrolimus, mycophenolate, and prednisone. All patients were subjected to prophylaxis with hepatitis B immunoglobulin and lamivudine. HLA typing was performed using a sequence-specific primer-polymerase chain reaction kit. Serology for hepatitis B and HBV DNA was examined using a commercial kit. RESULTS: The incidence of recurrent HBV infection post-LT was 6.86%. The recurrent infection of HBV was independent of the degree of HLA matching (P>0.05). The time point of HBV recurrence, however, was prolonged in HLA-A matched patients compared with matchless patients (P=0.049). The recurrence of HBV infection was independent of HLA compatibility. CONCLUSIONS: This retrospective analysis showed that more HLA-A locus compatibility is associated with a prolonged time of recurrence of HBV in patients after LT for end-stage HBV infection. The incidence of HBV recurrence is independent of HLA compatibility.