Cellular senescence is a permanent cell cycle arrest that may prevent the aged or abnormal cells from further expansion and is therefore a safeguard mechanism against unlimited cell proliferation.Recent studies demonstrated that oncogene-induced senescence could prevent neoplastic transformation in vitro and in vivo,and oncogene might cause tumors only in senescence deficient cells.Although the mechanism of the cellular senescence has not been completely illustrated,activation of P16INK4a-RB and ARF-P53 pathways has been implicated in this process.Further investigation of the signaling pathways leading to senescence may offer new avenues for tumor treatment.

Public hospital reform is the key to medical reform in China, and it is found that there is an obvious effect boundary between the zero margin drug profit and adjustment of medical service price reform, after looking back to progresses in these years.Mainly because it is not reasonable to cut off and change the internal motivation of supplier-induced demand, by the above two polices, It is of great concern to arouse medical staff''s enthusiasm about public hospital reform, by adjusting the remuneration system of the public hospital, which is also the most deep-seated mechanism problem of Public hospital reform.Starting from the overall policy framework of Public hospital reform in Sanming city, this study illuminates the inherent logic and margin of effect between the policies of reform of physicians'' remuneration system.From the analysis, it has been realized that physicians'' compensation system is the logic foundation of deep-rooted institutional problem.The present study draws a conclusion that it is not realistic to make great achievement by one or more policies.Meanwhile, it is rational to reach consensus on key links and progress of reform, by the deep understanding and analysis of public policy integrality.

Objective To investigate the effect of ketamine, the NMDA receptor antagonist, on inducible nitric oxide gynthase (iNOS) mRNA expression in the spinal cord during the development of morphine tolerance. Methods Thirty Kunming mice weighing 18-22 g were randomly divided into 5 groups ( n = 6 each): A control group received normal saline (NS) only; B chronic morphine tolerance group received subcutaneous morphine 10 mg?kg-1 followed by IP NS after an interval of 30 min, twice a day for 9 days and C, D, E ketamine groups received subcutaneous morphine 10 mg?kg-1 followed by IP ketamine 5 (group C) or 10 (group D) or 20 (group E) mg?kg-1 after an interval of 30 min, twice a day for 9 days. One hour after the last drug administration the animals were decapitated and the lumbar enlargement of the spinal cord was isolated and the iNOS mRNA expression in the spinal cord was detected by RT-PCR. Results Expression of iNOS mRNA was not detectable in group A but increased dramatically in group B. The iNOS mRNA expression was significantly lower in group D and E (ketamine 10 and 20 mg?kg-1 IP) than in group B and C (ketamine 5 mg?kg-1) . Conclusion Ketamine antagonizes the development of chronic morphine tolerance in mice through down-regulation of iNOS mRNA expression in the spinal cord.

Objective Glutarnic acid, an important excitatory neurotransmitter, plays an important role in morphine dependence and tolerance. Astrocyte (AST) takes up giutamic acid which is transformed into glutamine, the precursor of GABA, by means of intracellular glutaminase. The aim of thin study was to investigate the effect of ketamine on glutamate release in cultured spinal ASTs chronically treated with morphine. Methods ASTs were isolated from 1-3 day old SD rats and divided into 8 groups : control group and group A, B1, B2, B3 , C1, C2, C3. The isolated ASTs were cultured and incubated for 48h in the presence (group A, B1-3, C1-3) and absence (control group) of 10?mol?L-1 morphine.Then the ASTs were transferred to liquid culture medium Neurobasal / B27 containing no serum. No drug was added in group A. Morphine 0.1 ,1 or 10?mol?L-1 was added in group B1-3 and ketamine 0.4, 4 or 40?mol?L-1 in group C1-3. After being incubated for 15 min, naloxone 10?mol?L-1 was added in group B1-3 and C1-3. After another 30 min incubation the gluamate concentration in supernatant was measured using HPLC. Results There was no significant difference in glutamate concentration between control group and group A ( P

Objective Recent studies have shown that activation of spinal astrocytes (ASTs) may be involved in the development of morphine tolerance. The purpose of this study was to investigate the effect of ketamine (K) on spinal ASTs in mice tolerant to morphine (M) .Methods Thirty Kun-Ming mice of both sexes weighing 18-22 g were randomly divided into 5 groups of six animals each : (A) control group received only subcutaneous (s.c.) and intraperitoneal (i.p.) normal saline (NS); (B) chronic M-tolerance group received M 10 mg?kg-1 s.c. followed after 30 min by NS 10 ml?kg-1 i.p. twice a day (at 8:00 and 17:00) for 9 days;(C), (D), (E) K group received M 10 mg?kg-1 s.c. followed after 30 min by K 5 mg? kg-1(C), 10 mg?kg-1 (D) or 20 mg?kg-1 (E) i.p. twice a day for 9 days. Pain threshold was estimated by measuring paw withdrawal response to Von Frey filament stimulation every other day (1st, 3rd, 5th, 7th, 9th) In after second administration of drugs. The percentage of maximal possible effect (MPE% ) was calculated : MPE% = [ (test group PWTV - control group PWTV) / (15 - control group PWTV)] ? 100% (PWTV = paw withdrawal threshold value). On the 9th day after pain threshold was measured the animals were sacrificed and lumbosacral segment of spinal cord was removed. The changes in spinal ASTs were detected by immunohistochemistry. The average areas of GFAP immuno-reactive cells in the dorsal horn were measured to show the degree of spinal AST activation. Results 1. MPE% was 0 at all time points in group A. In group B MPE% was 42.8% on the 1st and 3rd day and gradually decreasing on the 5th and 7th day and became 0 on the 9th day signifying full development of morphine tolerance. In group C the change in MPE% was almost the same as in group B. In group D and E MPE % tended to decrease but was still above 30% at all time points signifying that ketamine 10 and 20 mg?kg-1 could partly antagonize the development of morphine tolerance. 2. In group B the staining of GFAP immuno-reactive cells was heavier and the average areas were significantly larger than in group A (P

Objective To investigate the effects of propofol the expression of inducible nitric oxide synthase (iNOS) in the spinal cord in rats with chronic neuropathic pain. Methods Forty adult Wistar rats of both sexes weighing 200-220 g were used in this study. Chronic neuropathic pain was produced by loose ligatures placed on the left sciatic nerve. Propofol or normal saline (NS) was given intraperitoneally (i.p. ) once a day for 6 days, seven days after sciatic nerve ligation. The animals were randomly divided into 4 groups (n = 10) : group Ⅰreceived NS 50 ml?kg-1 i.p. but no sciatic nerve ligation; group Ⅱ received sciatic nerve ligation and NS 50 ml?kg-1 i.p. ; group Ⅲ and Ⅳ received sciatic nerve ligation and propofol 50ml?kg-1 (Ⅲ) or75ml?kg-1 (Ⅳ) i.p. . Withdrawal threshold of both hind paws to Von Frey filaments was measured on the 6th , 10th and 12th days after sciatic nerve ligation. The animals were then sacrificed and the lumbar segment (L4-5) of the spinal cord was removed for the detection of iNOS mRNA expression by RT-PCR technique on the 12th day. Results The withdrawal threshold to Von Frey filament of both hind paws was significantly higher on the 10th and 12th days in the two propofol groups (group Ⅲ and Ⅳ) than in group Ⅱ(P

Objective To explore the effect of intra ve nous irradiation of low energy He-Ne laser on plasma endothelin(ET) levels in p atients with acute cerebral infarction (ACI). Methods Eighty-five patients with ACI were randomly divided into two groups: In group s I, the patients were treated with low energy He-Ne laser intravenous irradiat ion combined with conventional treatment (group ILIB);In group II, the patients were only received the conventional treatment (conventional control group). The levels of plasmal ET were measured using radioimmunoassay before and 10, 20 days after the treatment, simultaneously 39 healthy subjects were examined for ET le vels and served as the normal control group. Results Before treatment, the plasmal ET level of ACI was significantly higher than th at of normal control group ( P 0.05). ConclusionIt was suggested that intravenous irradiation therapy with low energy He-Ne laser could inhibit ET release and facilitate the recovery of ACI patients.

Objective To determine the genetic polymorphism of 24 Y-STR loci haplotype and investigate its application value in legal physical evidence.Methods AGCU Y24 kit and 3130xl Genetic Analyzer were used to detect the distribution of 24 Y-STR loci including DYS391,DYS389Ⅰ,DYS439,DYS389Ⅱ, DYS438, DYS643, DYS456, DYS458, DYS437, DYS635, DYS448, DYS527a/b, Y-GATA-H4, DYS447, DYS19,DYS392,DYS522,DYS393,DYS388,DYS390,DYS385a/b and DYS444in 154 unrelated individuals of Dongxiang ethnic minority males in Gansu province of China.Results A total number of 153 haplo-types were detected in 154 samples, the haplotype diversity was 0.9915 and the discrimination power was 0.9940.Conclusion The 24 Y-STR loci system has high haplotype diversity and discrimination power.

Objective:To investigate the expression of APRIL in NSCLC and to analyze the relationship between expression of APRIL and clinicalpathological characteristics of NSCLC.Methods:RTQ-PCR and Western blot were used to detect the expression of APRIL mRNA and protein in 68 pair of tumor tissues and corresponding adjacent normal tissues of NSCLC.50 Formalin-fixed,paraffin-embedded NSCLC samples were tested for APRIL protein location and expression by IHC,with results compared to the clinical and pathological parameters of NSCLC to determine significance.Results:The results showed that the expression level of APRIL mRNA and protein in tumor tissues was significantly higher than in normal tissues(both P

Objective To investigate the value of the cold supernatant in the clinical practice. Methods 25 cases of TTP got a direct infusion of cold supernatant or plasma exchange using cold supernatant as fluid replacement and with medications at the same time. Then we observed the clinical treatment effect of all the cases. Results The clinical remission rate of 25 cases of TTP was 80%. Conclusion The cold supernatant could be used as a new blood component in clinical application,especially for the treatment of thrombotic microangiopathy (TMA). It not only can save valuable blood resources,but also can reduce the economic costs of patients.