Objective To investigate the effects of aminolevulinic acid-based photodynamic therapy(ALA-PDT) on chicken combs, an animal model for port wine stains (PWS), and to explore the feasibility of PWS treatment with ALA-PDT. Methods A total of 80 leghorns were randomly and equally divided into 10 groups: blank control group receiving no treatment, ALA group treated with ALA alone, four single laser groups irradiated with 630-nm red laser at 75, 100, 150 and 200 J/cm2 respectively, four ALA-PDT groups pretreated with ALA followed by 630-nm red laser radiation at 75, 100, 150 and 200 J/cm2 respectively. An area sized 1 cm × 1 cm were marked at one side of combs in all these leghorns, and served as the experiment area to receive corresponding treatment, with that in the other side as the control area. Tissue specimens were obtained on the 14th and 28th days after treatment followed by the observation of morphological and histological changes, calculation of decrement rate in capillary number, and determination of apoptosis index in vascular endothelial cells (VECs) in chicken combs. Results In all the four ALA-PDT groups, the combs became lighter in color with apoptosis of some VECs as well as a decrease in capillary count and diameter in the dermis of the experiment areas. The decrement rate in capillary number was 33.53% ± 4.89%, 52.02% ± 2.77%, 67.48% ± 5.58%and 88.96% ± 2.47% respectively, and apoptosis index in VECs was 63.44 ± 1.09, 88.50 ± 6.11, 94.32 ± 3.67 and 113.76 ± 10.57 respectively, in the 75-, 100-, 150- and 200-J/cm2 ALA-PDT groups on the 14th day after treatment, and both the decrement rate and apoptosis index in each of these groups were significantly different from those in the blank control group, ALA group, single laser groups receiving red laser radiation at the corresponding dose, and the other ALA-PDT groups (all P < 0.01)separately. The apoptosis depth of VECs, defined as the vertical distance from the basal layer to the deepest level at which VEC apoptosis occurred, was 201.19 ± 0.33 μm, 266.15 ± 1.02 μm, 546.09 ± 2.45 μm and 766.37 ± 1.08 μm respectively in the 75-, 100-, 150- and 200-J/cm2 ALA-PDT groups on the 14th day, with significant differences between these four groups (all P < 0.01). Conclusions ALA-PDT can markedly damage capillaries in the animal model of port wine stains, chicken combs, with the degree and depth of capillary damage associated with red light energy density. The induction of VEC apoptosis may be an action mechanism of ALA-PDT in the treatment of PWS.

Epigenetic changes are important etiological factors of human tumor. The integrity of the genome is frequently challenged by the damage of DNA. However, the highly condensed structure of chromatin imposes significant obstacles on the repair processes. Eukaryotes have developed intricate mechanisms to overcome this repressive barrier imposed by chromatin. Covalent histone modifications and ATP-dependent chromatin remodeling play important roles in the process of DNA repair. Recent advances of the epigenetic regulations in the repair process were summarized. New findings in the cellular responses to DNA double strand breaks and how histone modifications and chromatin remodeling contributes to DNA double strand break repair were introduced. Future challenges in this field are also discussed.

OBJECTIVE:To establish the method for simultaneous determination of heavy metals in Platycodon grandiflorus, and to explore the effects of altitude on the contents of heavy metals. METHODS:The contents of As,Hg,Pb,Cu and Cd were determined by hydride generation,hydride generation method,graphite furnace method,flame spectrometry,graphite furnace meth-od. SPSS 19.0 software was adopted for clustering analysis and correlation analysis. RESULTS:The linear ranges of As,Hg,Pb, Cu and Cd were 0-16 μg/L(r=0.9960),0-18 μg/L(r=0.9996),0-50 μg/L(r=0.9997),0-0.8 μg/L(r=0.9990)and 0-4 μg/L (r=0.9980). Detection limit were 1.3×10-3,2.4×10-4,1.9×10-3,0.33,1.8×10-4 mg/kg. Quantitation limit were 4.4×10-3,8.0×10-4, 6.2 × 10-3,1.1,6.0 × 10-3 mg/kg. RSDs of precision,stability and repeatability tests were all lower than 3.0%. Recoveries were 99.1%-107.1%(RSD=3.13%,n=6),94.1%-100.5%(RSD=2.36%,n=6),98.9%-104.8%(RSD=1.81%,n=6),92.7%-100.3%(RSD=2.92%,n=6),96.6%-99.9%(RSD=1.26%,n=6). Samples with similar altitudes were clustered into a class;the con-tents of heavy metals decreased as the increase of altitude;there was significant correlation among 5 heavy metals. CONCLU-SIONS:The method is simple,precise,stable and repeatable,and can be used for simultaneous determination of heavy metals' contents in P. grandiflorus. The altitude has a certain effect on the quality of P. grandiflorus.

Objective:To explore therapeutic effect of cardiopulmonary resuscitation (CPR) and nursing intervention on patients with massive myocardial infarction (MMI) complicated cardiac arrest (CA) .Methods :A total of 100 MMI + CA patients ,who were treated in our hospital from Jan 2014 to Dec 2014 ,were selected .According to CA‐to‐CPR time ,patients were divided into >6min group (n=12) ,4~6min group (n=21) ,1~3min group (n=33) and <1min group (n=34) .CPR result ,patient outcome ,and satisfaction of patients and their family's on first aid and nursing were observed and compared among all groups .Results:Number of successful revived cases was 0 ,4 ,18 and 28 cases in > 6 min group ,4~6min group ,1~3min group and <1min group respectively ,there were 50 cases successfully revived in total .Compared with >6 min group ,4~6min group ,there were significant rise in success rates of CPR (0% ,19.05% vs .54.55% ,82.35% ) in 1~3min group and <1min group ,P<0.05 or <0.01. Cure rate was 43 (86. 00% ) in successful revived patients ,including 15 cases from 1~3min group and 28 cases from <1min group .Patient′s satisfaction was 66.67% ,90.48% ,93.94% and 97.06% in >6 min group ,4~6min group ,1~3min group and <1min group respectively ,and total satisfaction rate was 92.00% .No medical dispute occurred . Conclusion:CPR timing is the key of emergency rescuing patients with massive myocardial infarction complicated cardiac arrest ,and function of nursing intervention is great because it enhances rescue effect .

OBJECTIVETo observe the effect of Xingnaojing Injection combined with minimally invasive percutaneous drainage on brain edema and content of serum aquaporin-4 (AQP4) in patients with moderate hypertensive basal ganglia hemorrhage, and discuss the treatment mechanism of Xingnaojing injection combined with minimally invasive percutaneous drainage for cerebral hemorrhage.

METHODForty-two patients with moderate (25-50 mL) hypertensive basal ganglia hemorrhage (< 24 h) were selected and randomly divided into two groups: the observation group (n = 22) and the control group (n = 20). The neurological severity score were evaluated by the NIHSS (national institutes of health stroke scale), the volume of brain edemas were measured by head CT, the serum levels of AQP4 were determined by ELISA method on admission and 1 and 2 weeks after treatment.

RESULTOn admission, there was no significant difference in the scores of NIHSS, the volume of brain edemas and the level of serum AQP4 between the observation group and the control group. At the end of the first week after the treatment, the score of NIHSS of the observation group were lower than that of the control group, with significant different (P < 0.05); the observation group showed reduced volume of brain edemas than that on admission (P < 0.05), whereas the control group the control group showed increased volume of brain edemas than that on admission; the control group displayed increased level of serum AQP4 than that on admission, but without significant difference; the observation group displayed decreased level of serum AQP4 than that on admission (P < 0.05). At the end of the second week after the treatment, the control group showed decreased score of NIHSS than that on admission and at the end of the first week after treatment (P < 0.05). Compared with the control group, the observation group showed a much lower score of NIHSS (P < 0.01), the control group displayed reduced volume of brain edemas than that on admission and at the end of the first week after treatment, but the observation group was even lower than the control group. Both of observation and control groups displayed significantly reduced level of AQP4 (P < 0.05), but the observation group showed a lower AQP4 level than that of the control group (P < 0.05).

CONCLUSIONThe therapy of Xingnaojing injection combined with minimally invasive percutaneous drainage could remarkably reduce brain edema, and promote neural functional recovery, thus could be selected as a therapeutic regimen for patients with moderate hypertensive basal ganglia hemorrhage.

Aged ; Aquaporin 4 ; blood ; genetics ; Basal Ganglia Hemorrhage ; blood ; drug therapy ; etiology ; surgery ; Brain Edema ; blood ; drug therapy ; etiology ; surgery ; Drainage ; Drugs, Chinese Herbal ; administration & dosage ; Female ; Humans ; Hypertension ; complications ; Male ; Middle Aged ; Treatment Outcome

0.05). The positive expression rate of p21 and p53 in gallbladder carcinoma was 62.5%(25/40) and 65.0%(26/40) respectively. The expression values of p21 and p53 in chronic cholecystitis was 2.5%(1/40) and 5.0%(2/40) respectively, which was significantly different from that of gallbladder carcinoma ( P

Objective: To compare the extraction efficiency of imperialine extracted with different solvents. Methods: The content of imperialine in the extracts was determined by thin layer chromatography scanning. Results: Among the methods suitable for alkaloid extraction, the solvent ether chloroform 95% ethanol (25∶8∶2.5) is the best for imperialine extraction. Conclusion: The imperialine extraction efficiency is greatly affected by the extraction solvent.

Objective To study the effects of different nutritional support strategy on acute pancreatitis in rats induced by bile-pancreatic duct ligation. Methods Forty acute pancreatitic rats were divided into four groups and were given simple parenteral nutrition (PN, n=10), early enteral nutrition (EEN,n=10), mid term enteral nutrition(MEN, n=10), and late enteral nutrition (LEN, n=10) respectively. After seven-days of nutritional support, the weight changes and peritoneal dropsy were recorded, the zymologic index of serum biochemistry, pancreatic enzyme level, and malonaldehyde(MDA) concentration were detected, and the pancreatitic tissue were collected, stained with hematoxylin eosin, and histopathologically scored. Results Three rats died in EEN group, and one rat died in MEN group. The weight reduction and peritoneal dropsy in EEN and MEN groups were significantly larger compared with PN and LEN groups(P<0.05). The index of direct bilirubin in EEN rats was significantly higher than that in PN and LEN groups(P<0.05). The index of serum albumin of PN group was higher than those of the other three groups(P<0.05 ) ; the index of hemodiastase of PN group was lower than those of EEN and MEN groups(P<0.05 ) ; the index of hemolipase of PN group was lower than those of the other three groups(P< 0.05). The amount of pancreatic tissue amylase of PN and LEN groups was lower than those of EEN and MEN groups(P<0.05 ) ; the amount of pancreatic tissue lipase of EEN group was higher than those of PN and LEN groups (P<0.05). There was positive relationship between MDA concentration and histopathological score of pancreatic tissue(R=0.93, P<0.05) ; MDA concentration and histopathological score of EEN and MEN groups were significantly higher than those of PN and LEN groups (P<0.05).Conclusion Early enteral nutritional support exacerbates pathological changes of acute pancreatitic rats,which is unfavourable to the recovery of the pancreatitis.

Magnetic manipulation of particles/cells in microfluidic chips is a promising research field.This paper stated the operation mechanism and the main means of manipulation, including separation, concentration, capture, arrangement and assembly.Especially, the concept of particles/cells separation was emphasized with different criteria, like sizes, shapes, and magnetic properties.In addition, the effects of the channel geometry, the intensity and distribution of the magnetic field, and the types of magnetic liquid (paramagnetic salt solutions and ferrofluids) on the performance of the magnetic manipulation were also compared.The prospective to the prospect of magnetic manipulation about particles/cells in microfluidic chip was also depicted.

Objective To explore the resistance to antibacterial drugs in Mycoplasma pneumoniae (Mp) isolated from the chil-dren with community acquired pneumonia (CAP) in Shiyan area .Methods A total of 426 throat swabs and serum samples were collected from children patients with suspected CAP in Shiyan area from Feb .2013 to Apr .2015 .The throat swabs were used to culture Mp .The serum Mp-IgM was detected by ELISA ,the positive samples were confirmed by plate culture method ,meanwhile , the drug sensitivity test was taken .Results Among 426 children cases ,69 cases were confirmed as Mp infection ;the drug suscepti-bility test results showed that the resistance rate of Mp was 76 .8(53/69) to erythromycin ,65 .2% (45/69) to azithromycin ,18 .8%(13/69) to levofloxacin ,4 .3% (3/69) to tetracycline ,4 .3% (3/69) to minocycline and 24 .6% (17/69) to gentamicin .Conclusion Mp is one of the key pathogens of CAP in Shiyan area ,which is severely resistant to macrolide .The treatment should choose sensi-tive drugs as the treatment drug ,but it is important to consider the toxicity and adverse reactions of these several kinds of drugs to children .The blind medication should be avoided .