To clone and sequence analysis thioredxin redutase cDNA from human leucocyte.Methods:TR cDNA was obtained with RT-PCR and positive cloning was purified and sequenced. Results: of the 1 554 bp, I 494 bp were in an open reading frame encoding mature protein with 498 amino acids. Conclusion:The DNA encoding human leucocyte thioredxin reductase has been determined and the amino acid sequence has been predicted.

In eukaryotic cells,heat shock factor 1 is the main specific transcription factor mediating the enhanced expression of heat shock proteins when cells experience stresses.It is kept in a latent state by inhibitory complexes under unstressed conditions.It is only transiently activated in response to diverse forms stresses.Dominant-positive heat shock factor 1 has been developed through deletion-mutation.It can activate the expression of endogenous heat shock proteins in the absence of stresses.Environmental neurotoxins play an important role in the pathogenesis of Parkinson's disease.The neurotoxins induce cell death of dopamine neurons through oxidative damage.The results of Western blot and dual-luciferase analysis indicate that the expression of HSP70 was greatly up-regulated in dopaminergic SH-SY5Y cells transfected with dominant-positive heat shock factor 1.To investigate the effect of dominant-positive heat shock factor 1 on 6-OHDA-induced apoptosis in dopaminergic SH-SY5Y cells,the release of lactate dehydrogenase was detected.The result argues that dominant-positive heat shock factor 1 significantly inhibits neurotoxin 6-OHDA-induced cell death in SH-SY5Y cells.The cyto-protective role may be attributed to HSP70 activated by dominant-positive heat shock factor 1.Taken together,it is possible that dominant-positive heat shock factor 1 can be used to prevent or cure Parkinson's disease.

BACKGROUND:Sema7A is a kind of cel surface protein, which can promote the fusion of osteoclasts and the migration of osteoblast at the same time, affecting the dynamic balance of bone. OBJECTIVE:To investigate whether Sema7A siRNA has ainhibitory effect on the osteoclast activation in the process of osteolysis which induced by titanium particles. METHODS:The precursor osteoclasts with the concentration of 4×109 RESULTS AND CONCLUSION:At 7 days of culture, the expression levels of interleukin-1, interleukin-1β, tumor necrosis factor α, matrix metaloproteinase-9 and the receptor activator of nuclear factor-κB in the positive control, /L were seeded on 96-wel plates containing glass cover slips, and divided into four groups: blank control, positive control, experiment and negative control groups. The cel culture medium was added into the control group. 20 μL un-transfected siRNA supernatant was added into the positive control group. 20 μL transfected Sema7A siRNA supernatant was added into the experiment group. 20 μL transfected control siRNA supernatant was added into the negative control group. The supernatant was obtained through the co-culture between titanium particles solution and monocyte-macrophage cel line RAW264.7of mouse for 24 hours. siRNA was transfected into mononuclear macrophage cel lines RAW264.7 of mice. negative control and experiment groups were higher than those in the control group (P < 0.05). The expression level of each factor in the experiment group was lower than that in the positive control and negative control groups (P < 0.05). At 8 days of culture, the proliferation activity of osteoclasts and the number of positive cels stained by tartrate-resistant acid phosphatase in the positive control, negative control and experiment groups were higher than those in the control group (P < 0.05). The proliferation activity of osteoclasts and the number of positive cels stained by tartrate-resistant acid phosphatase in the experiment group were lower than those in the control and negative groups (P < 0.05). These results demonstrate that Sema7A siRNA has a certain inhibitory effect on the osteoclast activation induced by titanium particles.

BACKGROUND:Semaphorin7A (Sema7A) is a kind of cel surface protein, which can promote the fusion of osteoclasts and the migration of osteoblasts at the same time, affecting the dynamic balance of the bone. It is speculated that Sema7A siRNA may inhibit osteoblast apoptosis induced by titanium particles. OBJECTIVE:To study the effect of Sema7A on the preosteoblast activity inhibited by titanium particles. METHODS:Mouse MC3T3-E1 preosteoblasts at passages 6 and 7 were divided into four groups: in blank control group, MC3T3-E1 cels were cultured alone; in standard control group, cel were cultured with titanium particles; in experimental groups 1 and 2, the cels were cultured with titanium particles+Sema7A overexpression plasmids and titanium particles+Sema7A siRNA, respectively. Apoptotic rate of MC3T3-E1 cels was detected by flow cytometry; the mRNA expression of bone sialoprotein, osteocalcin and type I colagen was detected by Q-PCR; western blot assay was adopted to detect the protein expression of bone sialoprotein, osteocalcin and type I colagen; alizarin red calcium nodule staining was taken to detect the degree of osteoblast mineralization. RESULTS AND CONCLUSION:The expressions of bone sialoprotein, osteocalcin and type I colagen were decreased in the standard control group and experimental group 1, but these expression were significantly increased in the experimental group 2 compared with the standard control group (P < 0.05). Flow cytometry results suggested that the apoptotic rate of osteoblasts in the experimental group 1 was significantly higher than that in the other groups (P < 0.05), and the apoptotic rate in the experimental group 2 was lower than that in the standard control group (P < 0.05). Alizarin red staining showed that there were no obvious mineralized nodules in the experimental group 1, but mineralized nodules formed in the experimental group 2. In brief, the genetic interference technique that inhibits the activity of Sema7A can interfere the process of mouse MC3T3-E1 preosteoblast differentiation inhibited by titanium particles, and thus provide a feasible way for the clinical treatment of wear particles-induced osteolysis using biotechnology.

Objective To analyze the related risk factors of re-nonunion after primary revision for femoral shaft nonunion subsequent to failed intramedullary nailing. Methods A retrospective study was performed in 61 patients with femoral shaft nonunion subsequent to failed intramedullary nailing from June 2008 to June.All patients were divided into re-nonunion group(22 cases)and non-re-nonunion group (39 cases) according to diagnostic criteria of bone re-nonunion. Univariate analysis was used to analyze 14 factors that may lead to the occurrence of re-nonunion after revision for femoral shaft nonunion subsequent to failed intramedullary nailing including age, gender, body mass index (BMI), smoking, alcohol abuse, injury reason, fracture types, intramedullary nail types, locking screws technology for intramedullary nail, bone nonunion sites, bone nonunion time, pathological types of bone nonunion, primary revision methods and autologous bone graft or not, and multi-factor logistic regression analysis was performed on the factors showing a significant difference. Results Univariate analysis showed significant difference in smoking (χ2= 6.564, P = 0.036), BMI (χ2= 6.783, P = 0.021), bone nonunion sites(χ2=7.316,P=0.011),primary revision methods(χ2=8.069,P=0.003)and autologous bone graft or not(χ 2=6.668,P=0.027).Logistic regression analysis showed that primary revision methods(OR=1.027,95% CI 0.028-0.463,P<0.05)and autologous bone graft or not(OR=1.024,95% CI 0.006-0.363, P < 0.05) were independent risk factors for re-nonunion after revision of femoral shaft nonunion subsequent to failed intramedullary nailing. Conclusions Primary revision methods and autologous bone graft or not are independent risk factors for re-nonunion after revision of femoral shaft nonunion subsequent to failed intramedullary nailing.By strictly controlling the surgical indications and combining with autogenous bone grafting,it is possible to reduce the occurrence of nonunion after primary revision of the femoral shaft nonunion subsequent to failed intramedullary nailing.

Objective To explore the effect of primary exchange reamed nailing (ERN) and augmentation compression plating (ACP) combined with autogenous bone grafting (ABG) on health-related quality of life in patients with dystrophic or atrophic nonunion of femoral shaft after intramedullary nailing. Methods The study used a prospective study method. Sixty- two patients with femoral shaft nonunion after intramedullary nailing from August 2010 to October 2016 were selected, and the patients were divided into ERN group (group A, 32 cases) and ACP group (group B, 30 cases) by random digits table method. In group A, isthmus nonunion was in 18 cases (56.2％), and non-isthmus nonunion in 14 cases (43.8％); in group B, isthmus nonunion was in 16 cases (53.3％), and non-isthmus nonunion in 14 cases (46.7％ ). The health- related quality of life was compared between 2 groups, including physical component summary (PCS) and mental component summary (MCS) in the- 12- item short form health survey (SF- 12), brief pain inventory- severity (BPI- S) and brief pain inventory- interference (BPI- I). Results Fifty-four patients were followed-up for more than 1 year, and the mean follow-up time was 18.3 (13 to 37) months. All patients successfully achieved bone union, and the mean time was 5.8 (4 to 8) months. Significant improvements in terms of SF-12 PCS and SF-12 MCS score were noted after operation for patients with isthmus nonunion in both groups (t=3.148, 2.156, 2.456 and 2.559; P < 0.05), but there were no significant differences before and after operation in group A with non-isthmus nonunion (P >0.05). At the last follow-up, SF-12 PCS and SF-12 MCS in group B were significantly improved compared with those in group A: (45.2 ± 5.8) scores vs. (33.6 ± 4.7) scores and (48.8 ± 6.5) scores vs. (39.4 ± 5.6) scores, and there were statistical difference (P<0.05); SF-12 BPI-S and BPI-I showed obvious relief: (4.6 ± 2.1) scores vs. (6.2 ± 2.5) scores and (5.2 ± 1.9) scores vs. (6.8 ± 2.7) scores, and there were statistical differences (P<0.05); however there were no statistical difference in SF-12 PCS, SF-12 MCS, BPI-S and BPI- I between 2 groups (P>0.05). Conclusions Compared with ERN combined with ABG, ACP combined with ABG can significantly improve the quality of life in patients with dystrophic or atrophic nonunion of femoral shaft after intramedullary nailing. It has greater advantage on the improvement of health-related quality of life, especially for patients with non-isthmus nonunion.

Objective:To observe the effect of combining scalp acupuncture with hyperbaric oxygen on serum homocysteine and highly-sensitive c-reactive protein levels and functional recovery after cerebral infarction.Methods:A total of 101 survivors of cerebral infarction were divided randomly into a scalp acupuncture group ( n=33), a hyperbaric oxygen group ( n=34) and a combined treatment group ( n=34). All received routine treatment plus the appropriate supplementary treatment once a day for 10 days. The subjects were evaluated before the experiment as well as 10 and 90 days afterward. The National Institutes of Health′s stroke scale (NIHSS) was used to quantify neurological deficits and the Barthel Index quantified ability in the activities of daily living. Ninety days after the treatment, modified Rankin scale scores were also assigned. The levels of serum homocysteine (Hcy) and highly-sensitive c-reactive protein (hs-CRP) before and after 10 days of treatment were also compared among the 3 groups. Results:The average NIHSS and Barthel Index scores of all three groups had improved significantly after 10 days of treatment and the improvements persisted at the follow-up 3 months later. Both results were significantly better in the combined treatment group than in the scalp acupuncture group at the 90-day follow-up evaluation. The average Rankin score of the combined treatment group was lower at the last follow-up. Compared with before the intervention, the average Hcy of the scalp acupuncture group, the average hs-CRP of the hyperbaric oxygen group, as well as the average Hcy and hs-CRP of the combined treatment group were significantly lower after 10 days of treatment. Compared with the scalp acupuncture group, the average Hcy [(11.68±2.6) μmol/L] of the combined treatment group was significantly lower after the 10 days of treatment.Conclusions:Supplementing scalp acupuncture with hyperbaric oxygen therapy improves the long-term outcomes of cerebral infarction, reducing the level of serum Hcy.

ObjectiveTo examine whether DNA extracted from free edge fingernails specimens from patient after hematopoietic stem cell transplantation (allo-HSCT) could be used for short tandem repeat (STR) genotyping and chimerism analyzing,and to observe the chimerism status in fingernails after allo-HSCT.MethodsPeripheral blood,bone marrow,oral mucosa and free edge fingernail specimens were collected from 25 patients which allo-HSCT were performed in Beijing Dao-pei Hospital during Jul.2009 to Sep.2011 and their donor.Genomic DNA was extracted and 15 STR loci genotyping and chimerism analysis were performed.For the first group which including 12 patients,pairs of fingernail and oral mucosa specimens were collected within one month after allo-HSCT and were comparative analyzed.For the second group which including 13 patients,chimerism status in fingernail samples were analyzed 3 months or longer after allo-HSCT,and 3 patients underwent repeated testing at different times.ResultsFor the first group,4 oral mucosa specimens showed donor chimerism with varying degrees,but no donor chimerism was detected.in all of 12 fingernail specimens.For the second group,6.7％ to 82.6％ donor chimerism was detected in fingernail specimens in 5 out of 13 patients.For the 3 patients underwent repeated testing,donor chimerism was continued negative in one cases,but continued positive in the other 2 cases.ConclusionsFree edge fingernail samples of patients within one month after allo-HSCT can be used for STR typing and chimerism analysis,and it is better than oral mucosa samples.There are cells in allo-HSCT donor graft can differentiate into skin cells,donor derived skin cells chimerism can be formed and persist in some patients.Med,2012,35:23-26)

Objective:To design and manufacture the female infant diaper, and to explore the application effect of the diaper in routine urine collection of female infants.Methods:Female infants hospitalized in department of Orthopedic Rehabilitation of Children′s Hospital of Zhejiang University School of Medicine from July 2020 to June 2021 were selected as the research objects. According to the chronological order, 148 female infants admitted from July to December 2020 were selected as the control group, and 154 female infants admitted from January 2021 to June 2021 were selected as the experimental group. In the experimental group, urine routine was collected by female infants diapers, while in the control group, urine routine was collected by traditional disposable urine collection bag. The time required for routine urine collection, the number of urine collection bags, the incidence of perineal skin injury and the satisfaction of parents were observed.Results:The time required for routine urine collection was (16.86 ± 12.58) h in the experimental group and (28.76 ± 22.20) h in the control group. The difference between the two groups was statistically significant ( t=5.70, P<0.05). The number of female infant diapers in experimental group was (1.69 ± 0.67); The number of disposable urine collection bags used in the control group was (2.76 ± 1.32), and the difference between the two groups was statistically significant ( t=8.81, P<0.05). In the experimental group, the incidence of perineal skin injury was 0. In the control group, the incidence of perineal skin injury was 24.8%(42/148). The difference between the two groups was statistically significant ( Z=-9.78, P<0.01). The satisfaction of parents in the experimental group was 98.7% (152/154), witch higher than that in the control group was 79.7% (118/148), and the difference was statistically significant ( Z=-9.68, P<0.01). Conclusions:Compared with the traditional disposable urine collection bag, the diaper collection for female infants can shorten the time required for routine urine collection, reduce the number of urine collection tools, reduce the incidence of perineal lesions in children, improve the satisfaction of parents of children, reflect the people-oriented nursing concept, and provide greater clinical convenience.

Objective:To investigate the latent classes and influencing factors of vicarious posttraumatic growth among emergency nurses.Methods:Convenience sampling method was used to select the 498 emergency nurses of 20 public general hospitals in Anhui province as the survey objects. The general information questionnaire and Posttraumatic Growth Inventory were used to investigate. Latent class analysis was used to classify vicarious posttraumatic growth of emergency nurses, and the influencing factors of latent classes were analyzed by binary logistic regression.Results:There were two latent classes of vicarious posttraumatic growth of emergency nurses including high growth-high fluctuation group (24.1%, 120/498) and low growth group (75.9%, 378/498). Binary logistic regression analysis showed that professional title, average monthly income and self-rated health status were the factors influencing the latent classes (all P<0.05). Conclusions:There are obvious classification characteristics of vicarious posttraumatic growth among emergency nurses. Nursing managers should formulate and implement targeted intervention measures according to the classification characteristics and influencing factors to improve their vicarious posttraumatic growth level.