Adenosine triphosphate (ATP) regeneration systems are essential for efficient biocatalytic phosphoryl transfer reactions. Polyphosphate kinase (PPK) is a versatile enzyme that can transfer phosphate groups among adenosine monophosphate (AMP), adenosine diphosphate (ADP), ATP, and polyphosphate (Poly P). Utilization of PPK is an attractive solution to address the problem of ATP regeneration due to its ability to use a variety of inexpensive and stable Poly P salts as phosphate group donors. This review comprehensively summarizes the structural characteristics and catalytic mechanisms of different types of PPKs, as well as the variations in enzyme activity, catalytic efficiency, stability, and coenzyme preference observed in PPKs from different sources. Moreover, recent advances in PPK-mediated ATP regeneration systems and protein engineering of wild-type PPK are summarized.
Adenosine Triphosphate/metabolism* ; Adenosine Monophosphate ; Polyphosphates/metabolism* ; Catalysis ; Regeneration

Objective:To evaluate the effect of propofol on the sensitivity of glioma cells to temozolomide and the role of long noncoding RNAs (lncRNAs)-growth arrest-specific transcript 5 (GAS5) in it.Methods:Human glioma cell line U251 were cultured in vitro and seeded in 6-, 24- or 96-well plates at a density of 1×10 5 cells/ml, and were divided into 5 groups ( n=30 each) using a random number table method: control group (group C), temozolomide group (group T), propofol + temozolomide group (group PT), negative-siRNA + propofol + temozolomide group (group NPT) and GAS5-siRNA + propofol + temozolomide group (group GPT). The U251 cells in group C were cultured in the common culture medium.In group T, temozolomide 400 μmol/L was added to the culture medium.In group PT, the cells were cultured with propofol 8 μg/ml first and then with temozolomide 400 μmol/L.In group NPT and group GPT, U251 cells were transfected with negative-siRNA and GAS5-siRNA, respectively, and then cultured in the same way as previously described in group PT.The expression of lncRNA-GAS5 in U251 cells was detected by quantitative real-time polymerase chain reaction, the cell survival rate was measured by CCK-8 assay, the apoptosis rate was determined by flow cytometry, cell invasion was determined by Transwell invasion assay, and the expression of c-Myc, glutathione S-transferase mu 3 (GSTM3) and P21 was detected by Western blot. Results:Compared with group C, the cell survival rate was significantly decreased, the apoptosis rate was increased, the number of invasive cells was decreased, the expression of c-Myc and GSTM3 was down-regulated, and the expression of P21 and lncRNA-GAS5 was up-regulated in the other four groups ( P<0.05). Compared with group T, the cell survival rate was significantly decreased, the apoptosis rate was increased, the number of invasive cells was decreased, the expression of c-Myc and GSTM3 was down-regulated, and the expression of P21 and lncRNA-GAS5 was up-regulated in group PT and group NPT ( P<0.05). Compared with group PT, the cell survival rate was significantly increased, the apoptosis rate was decreased, the number of invasive cells was increased, the expression of c-Myc and GSTM3 was up-regulated, and the expression of P21 and lncRNA-GAS5 was down-regulated in group GPT ( P<0.05), and no significant change was found in the parameters mentioned above in group NPT ( P>0.05). Conclusions:Propofol can enhance the sensitivity of glioma cells to temozolomide, and the expression of lncRNA-GAS5 is involved in the process.

【Objective】 To reveal possible mechanisms of miRNA in diabetic hepatopathy through bioinformatics method. 【Methods】 Subset data of miRNA and their matched mRNAs in the liver of STZ-induced diabetic mice and the normal liver tissues of congenial mice by detecting on microarrays were collected from GEO database； information from the database and bioinformatics analysis were applied to mine a batch of miRNAs in diabetic hepatopathy and targeted mRNAs regulated. Then qRT-PCR was used to verify the expressions of miRNAs in diabetic liver from 20 STZ-treated Kunming mice and 10 normal homologous mice. 【Results】 Via detection and analysis， miRNAs differentially expressed （including 96 up-regulated and 77 down-regulated） were significantly obtained. Groups of miRNAs and their effectors （mRNAs） that may be related to the pathological process of diabetic liver disease in mice were screened by GO and KEGG enrichment analyses， combined with relevant protein annotations in the databases and references. The expressions of miR-200a-3p， miR-200b-3p and miR-222-3p in the mice’s liver tissue detected by qRT-PCR were significantly down-regulated. In addition， the expressions of related effector genes CERS6， MYBL1， SCD2， SLCO1A4 and PLK2 were up-regulated， while the expressions of ACSS2， BCL6 and SLC10A2 were down-regulated. 【Conclusion】 The variation trend of those candidate miRNAs in mouse diabetic liver compared with that in control livers was consistent with that of the previous studies and prediction， which revealed their potential molecular regulation in this disease process.

Interventional radiology is a new kind of minimally-invasive therapeutics that has developed on the basis of radiological imaging diagnosis.Interventional radiology is defined as a clinical subject that carries out the specific diagnosis and treatment under the guidance of medical imaging equipment and with the help of puncture needle,guide wire,catheter,etc.The interventional radiology categories include interventional diagnosis and interventional therapy.Interventional medicine is defined from the perspective of clinical application,while interventional radiology is defined from the technical characteristics of diagnosis and treatment.《of Interventional Radiology》 and the upcoming 《Journal of Interventional Medicine (English version)》 will become the professional sister journals in interventional academic field,which will provide important support for promoting the development of interventional medicine in China and for enhancing the international influence power of Chinese interventional medicine.

Objective To investigate the characteristics and outcome of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) in patients with renal injury. Methods AAV patients with renal injury diagnosed in the Department of Nephrology, Renmin Hospital of Wuhan University, from January 2012 to January 2017 were included into this study. Patients were divided into MPO-ANCA positive and PR3-ANCA positive groups for further study. The clinical characteristics, pathological and laboratory indexes, treatment and prognosis were retrospectively analyzed. Results A total of 68 cases were enrolled, among which 52 cases (76.5%) were MPO-ANCA positive and 16 cases (23.5%) were PR3-ANCA positive, and 41 patients (60.3%) were over 65 years old. The incidences of interstitial lung disease, digestive and nervous system damage in PR3-ANCA positive group were significantly higher than those MPO - ANCA positive group (P<0.05). There were significant differences of hemoglobin, complement C3, complement C1q, IgE, 24 h urinary protein,erythrocyte sedimentation rate, procalcitonin, BVAS score and eGFR in two groups (P<0.05). 19 cases had done renal biopsy ,among them 14 cases were MPO-ANCA positive and 5 cases were PR3-ANCA positive. Incidence of crescentic necrotizing glomerulonephritis in PR3-ANCA positive group was significantly higher than that in MPO - ANCA positive group, and incidence of diffuse global glomerulosclerosis in MPO-ANCA positive group was significantly higher than that in PR3-ANCA positive group (all P<0.05). At the median follow-up time of 32 months, the relapse rate at 6 month of MPO-ANCA-positive and PR3-ANCA-positive patients were 46.2% and 75.0%, respectively (P<0.05). Multivariate logistic regression analysis showed that PR3-ANCA positive, age≥65 years old, baseline eGFR<30 ml·min-1·(1.73 m2)-1, and combined with pulmonary interstitial lesions were all independent risk factors for relapse. And the incidence of ESRD were 42.3%and 75.0%during the follow-up period and 10 patients (14.7%) died. COX regression analysis showed that patients older than 65 years old, BVAS score≥18 points, eGFR<30 ml·min-1·(1.73 m2)-1 and complicated with pulmonary interstitial disorders at the onset were independent risk factors causing ESRD or death. Conclusion The PR3-ANCA-positive patients had more severe renal injury than those with MPO-ANCA-positive patients, and the injury of extrarenal organs was more serious, recurrence rate was higher, and the prognosis was worse.

Objective To analyze the correlation between white matter injury and cognitive dysfunction using diffusion tensor imaging (DTI).Methods Seventeen subjects with TBI hospitalized from October 2012 to September 2013 had Glasgow coma scale (GCS) score of ≥ 13 (mild injury group, 10 cases) and ≤ 12 (moderate-severe injury group, 7 cases).Another 17 healthy subjects were used as controls.All were submitted to DTI examination.Fractional anisotropy (FA) and apparent diffusion coefficient(ADC) values in genu corpus callosum, splenium corpus callosum, posterior internal capsule, anterior internal capsule, and cerebral peduncle were calculated using the Neuro 3D software.Correlations between FA and ADC with the mini-mental state examination (MMSE) score were evaluated.Results Moderate-severe injury group demonstrated significantly reduced FA values in genu corpus callosum and splenium corpus callosum, and significantly increased ADC values of genu corpus callosum, splenium corpus callosum, posterior internal capsule and cerebral peduncle when compared to control group (P ＜0.05 or 0.01).FA and ADC values in the regions of interest did not differ significantly between mild injury group and control group (P ＞ 0.05).In the genu corpus callosum and splenium corpus callosum, FA values were positively correlated with MMSE score (r =0.636, 0.601), while ADC values were negatively correlated with MMSE score (r =0.552, 0.660).Conclusions DTI reveals the cerebral white matter lesion that is undetectable using CT and conventional MRI.DTI is a helpful tool to evaluate the degree of cognitive function in patients with TBI, which provides the basic reference for the clinical treatment and prognosis.

group was (1.20 ± 1.09),(1.09 ± 1.04), (0.86 ± 0.42), (1.89 ± 1.30) and that of the control group was (2.40 ± 1.87), (2.34 ± 1.71), (1.60 ± 1.33),(3.49 ± 1.72) respectively, which had statistical significance between the two groups (t=3.139-4.390, P<0.01). the Blood CRP values and CRP positive rate in the observation group, were (6.34±2.74) and 17.14%(6/35) respectively and which of the control group were (10.35±7.37) and 42.86%(15/35), the difference of the two groups was statistically significant (t=2.881, P<0.01 andχ2= 5.250, P < 0.05). Conclusions Topical treatment of acute cellulitis with honey can effectively improve the clinical symptoms, reduce the level of c-reactive protein, which is better than magnesium sulfate wet compress.

Objective To assess the value of functional magnetic resonance urography (fMRU)for the unilateral renal function in children with hydronephrosis.Methods Fourteen children with congenital hydronephrosis (unilateral hydronephrosis in 1 2 cases,bilateral hydronephrosis in 2 cases)examined by fMRU in Beijing Children′s Hospital,Capital Medical University,were enrolled.In 7 patients of them,diuretic renal scintigraphy (DRS)was per-formed within 1 0 days before fMRU examination.The following parameters in fMRU,as renal parenchymal volume,volu-metric differential renal function (vDRF),Patlak,Patlak differential renal function (pDRF),index of glomerular filtra-tion rate (GFR)and differential renal function based on index of GFR (gDRF),were calculated and analyzed.Statisti-cal analysis was performed by using SPSS 1 3.0.Results In 7 cases whose fMRU and DRS were examined,the indexes of GFR obtained from fMRU and GFR from DRS were well correlated (r =0.892,P <0.001 )in 1 4 kidneys.The gDRF determined by 2 methods on the left kidneys[the average was(46.80 ±1 9.20)% and(45.1 8 ±20.29)%,respective-ly]had no significant difference (t =0.051 6,P =0.624),which was also highly correlated (r =0.91 2,P =0.004). In 1 2 cases with unilateral hydronephrosis,vDRF,pDRF,index of GFR and gDRF in hydronephrotic side[(43.54 ± 9.61 )%,(42.80 ±1 0.83)%,(38.56 ±29.23)mL/min,(38.37 ±1 3.61 )%]were all less than those in the con-tralateral side[(56.46 ±9.61 )%,(57.1 9 ±1 0.83)%,(57.02 ±26.22)mL/min,(61 .63 ±1 3.61 )%](t =2.326, 2.300,2.422,2.960;P =0.040,0.042,0.034,0.01 3).However,there was no statistical difference in both renal pa-renchymal volume and Patlak between the hydronephrotic and the contralateral side kidneys(t =1 .765,1 .450;P =0.1 05,0.1 75).Conclusions fMRU is a very valuable examination method in evaluating single kidney function in children with congenital hydronephrosis,and able to demonstrate that gDRF,indexes of GFR,vDRF and pDRF decrease in the hydronephrotic kidney.

ObjectiveTo study the anti-inflammatory effect of traditional Chinese medicine (TCM) Changweishu on sepsis patients with gastrointestinal dysfunction and its protective effect on intestinal mechanical barrier.Methods A prospective research method was conducted. Fifty sepsis patients with gastrointestinal dysfunction admitted into Department of Emergency Intensive Care Unit (EICU) of Hebei Provincial TCM Hospital from October 2013 to June 2015 were enrolled, and they were divided into a conventional treatment of western medicine control group and a TCM Changweishu group according to the random number table method, 25 cases in each group. The conventional western medicine treatment was given to both groups, and in TCM Changweishu group, additionally Changweishu 1 dose per day, a mixture of following ingredients constituting one dose without decoction, was applied, including: rhubarb 9 g, dandelion 20 g, green tangerine peel 15 g, angelica sinensis radix 15 g, red and white peony each 12 g, rhizome ligusticum 9 g, agrimony 20 g, coptidis rhizoma 6 g, rhizoma pinelliae 6 g, fructus trichosanthis 15 g, garden burnet root 20 g, poria 20 g, and taken once 1/2 dose in the morning and once 1/2 dose in the evening by oral or nasal feeding. After treatment for 7 days, the level changes of inflammatory factors of tumor necrosis factor-α(TNF-α), interleukin-6 (IL-6), high mobility group protein B1 (HMGB1) and gastrointestinal dysfunction indexes of diamine oxidase (DAO), D-lactic acid in the two groups were observed.Results After treatment, the levels of TNF-α, IL-6, HMGB-1, DAO, D-lactic acid in the two groups were significantly lower than those before treatment [the western medicine control group: TNF-α (A value) 10.89±1.65 vs. 50.30± 1.58, IL-6 (A value) 7.35±1.85 vs. 12.66 ± 1.43, HMGB1 (A value) 5.28 ±1.64 vs. 6.23±0.95, DAO (A value) 5.87±0.59 vs. 6.67±0.49, D-lactic acid (A value) was 2.63±0.17 vs. 4.58±0.16; TCM changweishu group: TNF -α (A value) 5.38±1.19 vs. 51.23±2.34, IL-6 (A value) 5.54±1.26 vs. 13.24±1.78, HMGB1 (A value) 3.69±1.09 vs. 6.14±1.42, DAO (A value) was 3.39± 0.40 vs. 6.70±0.34, D-lactic acid (A value) 1.95±0.13 vs. 4.63±0.11, allP < 0.05]. After treatment, the degrees of decline in indexes of TCM Changweishu group were more obvious than those in western medicine control group [TNF-α(A value) 5.38±1.19 vs. 10.89±1.65, IL-6 (A value) 5.54±1.26 vs. 7.35±1.85, HMGB1 (A value) 3.69 ±1.09 vs.5.28±1.64, DAO (A value) 3.93±0.40 vs. 5.87±0.59, D-lactic acid (A value) 1.95±0.13 vs. 2.63±0.17, allP <0.05].Conclusions TCM Changweishu has protective effect on sepsis patients with gastrointestinal dysfunction, and its mechanisms are the amelioration of damage in intestinal tract mechanical barrier, decrease of permeability of intestinal mucosa and inhibition of levels of inflammatory factors.

Objective To compare the clinical efficacy of transdorsal-to-plantar (TDP) or transplantar-to-dorsal (TPD) retrograde endovascular angioplasty in treating below-the-knee arterial occlusion diseases, and to compare it with conventional anterograde endovascular angioplasty. Methods A total of 96 patients with below-the-knee arterial occlusion diseases (112 diseased lower extremities in total), who were admitted to authors’ hospital during the period from Oct. 2009 to July 2011 to receive conventional anterograde endovascular angioplasty, were enrolled in this study. The clinical data were retrospectively analyzed. Among the 112 diseased lower extremities, conventional anterograde endovascular angioplasty failed in 27, and TDP or TPD retrograde endovascular angioplasty had to be carried out. A total of 71 patients (85 diseased lower limbs) were successfully treated with conventional anterograde endovascular angioplasty (routine group), while 20 patients (22 diseased lower limbs) were successfully treated with retrograde endovascular angioplasty (retrograde group). The preoperative ankle-brachial index(ABI), the coronary angiography-based thrombolysis in myocardial infarction (TIMI) flow score, the dorsal or plantar arterial pulse score, the postoperative limb salvage rate and target vessel patency rate were calculated, and the results were compared between the two groups. Results The technical success rate in the retrograde group and the routine group was 75.9% and 74.0%respectively (P>0.05). Preoperative ABI value of the retrograde group and the routine group was 0.55± 0.21 and 0.56±0.14 respectively, after the treatment which increased to 0.93±0.19 and 0.89±0.18 respectively (P>0.05). Preoperative TIMI score of the retrograde group and the routine group was 0.1 ±0.5 and 0.8 ±0.8 respectively, which significantly increased to 2.5±0.6 and 1.8±0.8 respectively (P<0.000 1). In the retrograde group, the blood flow perfusion of the distal foot tissue was improved. The primary target vessel patency rate at 12 months and 24 months after the treatment in the retrograde group and the routine group were 63.6%(14/22), 45.5%(10/22) and 52.9%(45/85), 37.6%(32/85) respectively (P>0.05). Twenty-four months after endovascular angioplasty Kaplan-Meier analysis indicated that the limb salvage rate of the retrograde group and the routine group was 95.5%and 96.5%respectively (P>0.05). Conclusion Compared with conventional anterograde endovascular angioplasty for the treatment of below-the-knee arterial occlusion diseases, retrograde endovascular angioplasty via TDP or TPD path can immediately improve the blood flow with obvious improvement of ABI score, primary target vessel patency rate as well as the limb salvage rate. Therefore, retrograde endovascular angioplasty should be regarded as an effective supplementary technique when anterograde angioplasty fails.