This study examined the role of PI3K/Akt pathway in radiosensitization of DNA damage of cervical carcinoma cells. The 50% inhibition concentration (IC(50)) of cisplatin and docetaxel in HeLa cells was detected by Mono-nuclear cell direct cytotoxicity assay (MTT) in vitro. HeLa cells were treated by cisplatin/docetaxel of 10 percent of IC(20) alone or combined with LY294002 for 24 h, and then radiated by different doses of X-ray. The cell survival ratio was obtained by means of clone formation. One-hit multi-target model was fitted to the cell survival curve to calculate dose quasithreshold (Dq), mean lethal dose (D(0)), 2Gy survival fraction (SF(2)) and sensitization enhancement ratio (SER). The pAkt and total Akt expression was detected by Western blotting and DNA damage by neutro-comet electrophoresis. The HeLa cells were randomly divided into 7 groups in terms of different treatments: Control; radiation treatment (RT) group; LY294002+RT group; cisplatin+RT group; docetaxel+RT group; LY294002+cisplatin+RT group; LY294002+docetaxel+RT group. The apoptosis ratio of each group was measured by flow cytometry. The results showed that docetaxel and cisplatin significantly enhanced the phosphorylation of Akt in radiation-treated HeLa cells. The Dq, D(0) and SF2 in LY294002-contained groups were lower than those in docetaxel or cisplatin+RT group. The SER in the LY294002+docetaxel+RT group was 1.35 times that of the docetaxel+RT group, and that in the LY294002+cisplatin+RT group 1.26 times that of the cisplatin+RT group. The Comet electrophoresis showed that tail distance in the LY294002+cisplatin+RT group or LY294002+docetaxel+ RT group was longer than in the cisplatin+RT group or docetaxel+RT group. The apoptosis ratio in the LY294002+cisplatin+RT group or LY294002+docetaxel +RT group was higher than in the cisplatin+RT group or docetaxel+RT group. It was concluded that inhibiting PI3K/Akt pathway can increase the effect of docetaxel and cisplatin on the radiosensitivity of HeLa cells and DNA damage resulted from radiation.

Objective To observe the impairment of different doses of cyclosporine A (CsA) to the rat myocardial tissue to offer scientific evidence for the long-term safe application of CsA in heart transplantation. Methods Eighty-four female Wistar rats, each weighing of (200 ± 25)g, were randomly divided into 12 groups. On days 7,14,21 after a constant peritoneal injection of CsA(0,5,10,15 mg/kg) and 1 ml physiological saline in control group, the rats were put to death, the rat myocardial tissue taken, to observe the pathologic and structural changes of the tissue cells under light microscope and electron microscope. The contents of rat myocardium tissue malondialdehyde(MDA) and superoxide dismutase(SOD) were measured;cardiomyocyte apoptosis was detected and accounted, apoptosis index(AI) was measured with the method of TUNEL. Results Small dose of CsA(5 mg/kg)had no obvious effects on cardiac tissue, in CsA groups of 10 mg/kg and 15 mg/kg, under the light microscope, there appeared edema, degeneration and necrosis of myocardium, part of cardiac myocyte had different level cavity;under the electron microscope, there appeared mitochondria damage, nucleus shrinkage and chromatic margination, part of cardiac myocyte had focus cavity. There was dilated endoplasic reticulum in the sarcoplasm. The effects of different time and dose on MDA content of rat myocardium tissue had statistical significance (F = 6.37,10.15, both P < 0.05). Interaction between time and dose existed statistical significance (F=7.14, P< 0.05). The MDA contents of CsA group of 10 mg/kg and 15 mg/kg were [(2.29 ± 0.18), (3.10 ± 0.45), (2.57± 0.37)nmol/L] and [(3.09±0.63), (3.32 ±0.52), (3.34 ± 0.29)nmol/L] on days 7,14,21 after a constant peritoneal injection of CsA, which were obviously higher than the control group [(1.98 ± 0.20), (2.04 ± 0.52), (1.99 ± 0.26) nmol/L, all P < 0.05], respectively. The effects of different time and dose on SOD activity of rat myocardium tissue had statistical significance(F = 8.43,11.69, both P < 0.05). Interaction between time and dose existed statistical significance(F = 9.86, P < 0.05). The SOD activity of CsA groups of 10 mg/kg and 15 mg/kg were (15.95 ± 1.00), (12.74 ± 1.31), (14.01 ± 0.81)nmol/L and (13.04 ± 1.01), (14.68 ± 0.81), (14.01 ± 0.63)nmol/L on days 7,14,21 after a constant peritoneal injection of CsA, which were obviously higher than the control group [(10.38 ± 0.80), (9.73 ± 0.58), (10.20 ± 0.26)nmol/L, all P < 0.05], respectively. Apoptosis nucleus appeared huffy or brown under the light microscope. The effects of different time and dose on AI of rat myocardium tissue had statistical significance (F = 10.02,20.46, both P < 0.05). Interaction between time and dose existed statistical significance (F = 15.73,P < 0.05). The AI of CsA groups of 10 mg/kg and 15 mg/kg were (6.91 ± 0.70)%, (11.10 ± 2.05)%,(19.81 ± 5.00)% and (11.02 ±2.02)%,(15.51 ± 1.31)%,(33.40±6.60)% on days 7,14,21 after a constant peritoneal injection of CsA, which were obviously higher than the control group [(4.40 ± 0.13)%, (4.60± 1.20)%, (5.20 ± 1.10), all P < 0.05] and CsA group of 5 mg/kg [(4.60 ± 0.10)%, (5.00±2.11)%, (5.43± 1.11)%, all P < 0.05], respectively. Conclusion Small dose of CsA has no obvious effects on cardiac tissue, but large dosage can induce myocyte apoptosis and damage by causing oxidative stress;after implantation, attention should be paid to cardiac impairment due to constant large dosage of CsA.

Objective To learn the species distribution characteristics and proportion occurrence of methicillin-resistant strains about Staphylococcus detected in the First People′s Hospital of Kunming.Methods The species distribution characteristics and proportion occurrence of methicillin-resistant strains were analyzed retrospectively from January 2005 to December 2013.Results A total of 3 561 Staphylococcus strains were detected in 9 years,included 21 species and subspecies,and another 12 strains were not i-dentified to species.2005-2013 species composition showed an increasing trend,there were five kinds of Staphylococcus in 2005, until 2013 reach to 13 kinds.Each year the main bacterial were Staphylococcus aureus,Staphylococcus epidermidis,Staphylococcus haemolyticus and staphylococcal hominis.Methicillin resistant Staphylococcus aureus incidence decreased significantly since 201 1, decrease from 76.3% in 2010 to 25.6% in 2013.Staphylococcus epidermidis,Staphylococcus haemolyticus,Staphylococcal hominis and coagulase-negative Staphylococci resistant to high incidence of methicillin-resistant strains of the average,remained stable at a-round 70.0%.Conclusion The distribution characteristic of Staphylococcus in this hospital was increasingly complex year by year, the opportunity of infection caused by Staphylococcus was also increased,the detection rate of methicillin-resistant strains was high, it should be noted to use clinical drug rationally.

Objective To judge the effect of plasma exchange (PE) to the patients with severe hepatopath of nonage according to evaluating the change of the liver function of reserve with 13C-methacetin breath test. Methods There are two groups: the case group and the control group. Each group has 30 patients. The patients in the case group were treated by PE. All the patients received 13C-methacetin breath test at before or one week after treatment. MVmax40, CUM40 and CUM120 were present. At the same time, clinical symptoms, glutamate-pyruvate transaminase (ALT), total bilirubin (TBiL) and prethrombin active (PTA) were observed. Results MVmax40, CUM40, CUM120 and PTA were higher, ALT and TBiL were lower in the case group after treatment (t=4.679, 4.752, 5.048, 5.413, 6.208, 7.413, P=0.000,P<0.01). After a week, MVmax40, CUM40, CUM120 and PTA were higher, ALT and TBiL were lower in the case group than that in the control group (t=2.260, 2.247, 2.476, 4.017, 3.250, 3.658, P<0.05). The total effective rates in the case group and the control group were 83.3 % (25/30) and 43.3 % (13/30),which are significant different(χ2 10.335,P<0.01). Conclusion PE can im-prove the liver reservation functionin the severe hepatopath of nonage.

Humans ; Acupuncture Therapy ; Neck Injuries ; Vertigo

Osteoarthritis (Osteoarthritis, OA) is a common clinical degenerative joint disease with increased incidence rate in recent years. Animal experiment is one of the important ways to explore pathogenesis and treatment of OA, while induced animal model is the most important part in animal experiment. Intra-articular injection of drugs is a classical method for establishing animal model of OA. Choose of animal should follows the principle of correlation, appropriateness and practicability, injections should perform in accordance with experimental purposes and subject, detections means and evaluation methods also should corresponding to experimental reality. The gold standard of OA animal model and intra-articular injections has not build, need further study.
Animals ; Cytokines ; analysis ; Disease Models, Animal ; Injections, Intra-Articular ; Mice ; Osteoarthritis ; diagnosis ; etiology ; immunology ; Rabbits ; Rats

The objective of this study was to develop research of cardiac cells to reestablish 3D tissue architecture in vitro, we performed studies using collagen membrane as three-dimensional scaffold for cardiac cells culture with the principles and methods of tissue engineering. The polymer scaffold provides a 3-D substrate for cell attachment and tissue formation. Cardiac cells isolated by enzymatic digestion from 1d old neonatal rats were seeded to three-dimensional collagen scaffolds and tissue culture plates. The morphology, beating rate and the metabolic indexes, including specific consumption rate of glucose (q(glu)) , specific production rate of lactate (q(lac)), lactate transform rate ( Y(lac/glu)), specific creatine kinase (CK) and lactate dehydrogenase (LDH) activities of cardiac cells cultured on three-dimensional collagen membrane and tissue culture plates were compared. It was found that cells shape and cells' CK and LDH activity was no differences between 3D and 2D cultures and cell beat rate on cell culture cluster was slower than those cells cultured on collagen membrane, However the cell glucose consumption and lactate yield rate of cells cultured on cluster was higher than those cells cultured on collagen membrane. After 5 days of cultivation, cardiac cells cultured on collagen membrane scaffolds organized into three-dimensional (3D) aggregates as opposed to the two-dimensional (2D) aggregates mosaic pattern seen in tissue culture plates, and spontaneous and rhythmical contractile 3D cultures in unison were visible to the naked eye and the area of synchronous contract three-dimensional (3D) aggregates reaches 80cm2. The mean value of q(glu), q(lac) and Y(lac/glu) of cultured on three-dimensional collagen scaffold was 7.37 micromol/10(6) cells/d, 2.92 micromol/10(6) cells/ d and 0.38 micromol/micromol, versus 7.59 micromol/10(6)cells/d, 3.83 micromol/10(6) cells/d and 0.51 micromol/micromol in tissue culture plates. These results demonstrate that cardiac cells immobilized on collagen membrane in 3D cultures maintain similar metabolic activity and contractile function when compared with native cardiac cells. The above results support the idea that engineered cardiac tissue can be used as a model of native tissue for studies of tissue development and function in vitro and eventually for tissue repair in vivo.
Animals ; Biocompatible Materials ; chemistry ; Cells, Cultured ; Collagen ; chemistry ; Flow Cytometry ; Immunohistochemistry ; Microscopy, Electron, Scanning ; Myocytes, Cardiac ; cytology ; ultrastructure ; Rats ; Rats, Wistar ; Tissue Engineering ; methods ; Tissue Scaffolds ; chemistry

ObjectiveTo explore the etiology and biochemical markers of acute liver failure (ALF) in children.Methods The cause and the biochemical markers of ALF in children who were treated in December 2014 to January 2011 were ana-lyzed retrospectively.ResultsA total of 67 children were enrolled, including 31 females and 36 males. According to the cause of the disease, the children were divided into non-genetic metabolic group, genetic metabolic group, and cryptogenic group. In the non-genetic metabolic group (29 cases, 43.28%) there were 12 cases of drug-induced ALF, 5 cases of Reye syndrome, 3 cases of hemophagocytic syndrome, 3 cases of herpes simplex virus infection, 2 cases of autoimmune hepatitis, one of case mushroom poisoning one case of hepatitis A virus infection, one case of cytomegalovirus infection and one case of sepsis respectively. In the genetic metabolic group (14 cases, 20.90%) there were 6 cases of Wilson’s disease, 2 case of glycogen storage disease, 2 of cas-es progressive familial intrahepatic cholestasis, 2 cases of neonatal intrahepatic cholestasis caused by citrin deifciency, one case of very long-chain acyl coenzyme A dehydrogenase deifciency and one case of primary carnitine deifciency. In the cryptogenic group there were 24 cases (35.82%). The serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), albumin, blood glucose level and AST/ALT were statistically signiifcantly different in genetic metabolic group from in non-genetic me-tabolism disease group and cryptogenic group, (P<0.05). The genetic metabolic group had the lowest levels of serum ALT, AST, albumin and glucose while the genetic metabolic group had the highest ratio of AST/ALT.ConclusionsThe etiology of ALF in children are complex. Genetic metabolic disease should be considered when the child with ALF has no signiifcantly elevated ALT, extremely high ratio of AST/ALT, combined with hypoproteinemia and hypoglycemia.

Objective: To provide longitudinal evidence for interventions in suicidal behavior among college students, this study explored the mechanisms underlying the relationship between cyberbully. Methods: Based on the general strain theory, 558 college students from Beijing and Xi an were followed up 2 times(T1 and T2) by using the Cyberbullying Questionnaire, Beck Scale for Suicide Ideation and Center for Epidemiological Survey Depression Scale(CES-D). Results: T1 cyberbully could positively predict depression and suicidal ideation among college students at T2( β =0.06, 0.15, P <0.01), and depression at T1 could positively predict suicidal ideation among college students at T2( β =0.29, P <0.01). The mediation effect revealed that depression at T1 could mediate the relationship between cyberbully and suicidal ideation. Compared to boys, girls were likely to be affected by cyberbully and resulted in depression and suicidal ideation. Conclusion Findings contribute to the prespective causal relation between cyberbullying and suicidal ideation among college students and provide the longitudinal evidence for intervention of suicidal ideation.

Lung cancer is currently one of the most common malignant tumors in the world. The occurrence and development of lung cancer, especially non-small cell lung cancer (NSCLC), are closely related to the abnormal expression of long non-coding RNA (lncRNA). lncRNA with a transcript of more than 200 nucleotides is involved in chromatin modification, transcription activation, transcription interference and other regulatory processes, and has varying degrees of regulation on the proliferation, migration, and invasion of tumor cells. It is characterized by up-regulation or down-regulation of expression. At present, there are a large number of studies on lncRNA, because lncRNA has considerable application prospects in the diagnosis, clinical treatment, drug resistance research and prognosis evaluation of NSCLC. In this paper, the overview of lncRNA, the up-regulation or down-regulation of NSCLC-related lncRNA expression, NSCLC clinical treatment and drug-resistant lncRNA were summarized.