Effect of Long Non-Coding RNA LINC01268 on the Malignant Biological Behaviors of Acute Myeloid Leukemia Cells / 中国实验血液学杂志

OBJECTIVE@#To investigate the effect of long non-coding RNA LINC01268 on apoptosis of acute myeloid leukemia (AML) cells and related mechanisms.@*METHODS@#The expression levels of LINC01268 and miR-217 in peripheral blood samples from AML patients and AML cell lines HL-60 and KG-1 were detected by qRT-PCR. HL-60 cells were divided into pcDNA3.1-NC, pcDNA3.1-LINC01268, si-NC, si-LINC01268, miR-NC, miR-217 mimics, si-LINC01268 + inhibitor-NC and si-LINC01268+ miR-217 inhibitor groups. The mRNA expressions of LINC01268 and miR-217 were detected by qRT-PCR. The targeting relationship between LINC01268 and miR-217 was detected by dual-luciferase reporter assay. Cell viability was detected by CCK-8 assay. Cell cycle distribution and apoptosis were detected by flow cytometry. The expression of cell cycle and apoptosis-related proteins p21, Bcl-2, Bax, caspase-3 and PI3K/AKT signaling pathway-related proteins were detected by Western blot.@*RESULTS@#The expression of LINC01268 in peripheral blood samples of AML patients and AML cell lines HL-60 and KG-1 was increased (P < 0.05), and the expression of miR-217 was decreased (P < 0.05). Compared with si-NC group and miR-NC group, the viability of HL-60 cells was decreased in si-LINC01268 group and miR-217 mimics group (P < 0.05), the proportion of cells in G1 phase and apoptosis rate were increased (P < 0.05), the protein expression levels of p21, Bax and caspase-3 were increased (P < 0.05), while the protein expression level of Bcl-2 was decreased (P < 0.05). LINC01268 targeted and negatively regulated the expression of miR-217, and inhibiting the expression of miR-217 partially reversed the effects of LINC01268 interference on the viability, cell cycle and apoptosis of HL-60 cells. Interference with LINC01268 could inhibit the activity of PI3K/AKT signaling pathway. Inhibiting the expression of miR-217 could partially reverse the inhibition of LINC01268 interference on PI3K/AKT signaling pathway.@*CONCLUSION@#LINC01268 is highly expressed and miR-217 is lowly expressed in AML cells. LINC01268 can promote the activity of PI3K/AKT signaling pathway, increase the survival rate and inhibit the apoptosis of AML cells by targeting miR-217 expression.

Effects of PRECEDE-PROCEED Model on Behavior of Patients after Total Hip Arthroplasty / 中国康复理论与实践

Objective:To explore the effect of PRECEDE-PROCEED model on health behavior and quality of life of patients after total hip arthroplasty. Methods:From February to December, 2018, 103 patients who underwent primary total hip arthroplasty were divided into control group (n = 51) and intervention group (n = 52). The control group received routine perioperative guidance, while the intervention group received PRECEDE-PROCEED model in addition, in accordance to the nine links of the model, multi-dimensional intervention measures should be formulated with tendency factors, contributing factors and strengthening factors as the core. They were followed up for six months after discharge, and were assessed with Health Promoting Life style Profile II (HPLP II) and the MOS Item Short From Health Survey (SF-36) one, three and six months after discharge, respectively. Results:There was no significant difference in the scores of HPLP II and SF-36 between two groups at discharge (P > 0.05). The scores of HPLP II and SF-36 were higher than in the intervention group than in the control group one, three and six months after discharge (t > 2.307, P < 0.05). Conclusion:PRECEDE- PROCEED model could change the undesirable life behavior after operation, and improve the health behavior and quality of life of patients with total hip arthroplasty.

Clinical Effect of Telerehabilitation after Total Knee Arthroplasty: a Meta-analysis / 中国康复理论与实践

Objective:To evaluate the outcome of telerehabilitation in pain control and function recovery after total knee arthroplasty. Methods:CNKI, Wanfang Data (WF), CBM, VIP, PubMed, Web of Science, Medline, Springer Link, and Cochrane Library were searched on the effects of telerehabilitation on the patients after total knee arthroplasty, and the literatures of random control trials (RCT) study in English and Chinese in the above databases from 2000 to 2018 were collected. Literature screening, quality evaluation, data extraction and data analysis were carried out by 2 researchers. The indexes of outcome in the RCT studies included Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), extension and flexion range, the Timed Up and Go Test (TUGT), Visual Analogue Scale (VAS) and Knee Injury and Osteoarthritis Outcome Score (KOOS). Results:A total of 6 RCT studies were included, with a total of 601 cases, 301 in the intervention group and 300 in the control group. There was difference in extension range (MD = 0.30, 95%CI: 0.20 to 0.40, P < 0.001), TUGT scores (MD = -5.17, 95%CI: -9.79 to -0.55, P = 0.03), VAS scores (MD = -0.43, 95%CI: -0.85 to -0.01, P = 0.04) and KOOS scores (MD = -1.10, 95%CI: -1.63 to 0.57, P < 0.0001) between two groups. There was no significant difference in WOMAC scores (MD = -0.32, 95%CI: -2.30 to 1.65, P = 0.75), flexion range (MD = 0.68, 95%CI: -2.28 to 3.63, P = 0.65), and muscle strength (MD = 13.77, 95%CI: -3.89 to 31.43, P = 0.13) (P > 0.05) between two groups. Conclusion:Telerehabilitation is effective to improve extension range, ambulation, pain and quality of life, while it is uncertainly effective in flexion range, knee function and muscle strength.

Metabolomics techniques and its application in research of important protozoan parasites / 中国人兽共患病学报

Metabolomics is a new discipline which has developed rapidly following post-genomic,transcriptomics and proteomics.It has become an important research method because of its unique advantages.It is mainly used in drug research and development,disease surveillance and other fields.In addition,with the gradual maturation of metabolomics technology and the gradual development of new analytical methods,the application of metabolomics has been more and more widely,and metabolomics technology has been gradually applied to the field of parasite research,especially for protozoan parasites.This paper summarizes metabolomics,metabolomics research methods,and the application of metabolomics in research of protozoan parasites,with the aims of further understanding of metabolomics technology,and providing reference basis for solving problems of protozoan parasites.

The biomechanical effect of bilateral unloading knee brace with internal-external rotation on knee joint / 医用生物力学

Objective Aiming at reducing the restrictions on lower limbs imposed by traditional knee brace, a design scheme for knee brace complying with internal-external rotation is proposed. Methods By adding the internal-external hinge, the knee brace could help to release the degree of freedom (DOM) of internal-external rotation of the knee. In the experimental group, the subject was required to wear the bilateral unloading knee brace with or without internal-external hinges, respectively, while in the control group, the subject did not wear the knee brace. Then gait experiment and mechanical testing were conducted. Results In gait experiment, the bilateral unloading knee brace with internal-external hinges imposed less restriction on the knee than that from the knee brace without internal-external hinges, and it could also provide some distractive force for the knee joint. Conclusions The internal-external hinge design can help to reduce restrictions on the knee imposed from bilateral unloading knee brace.

Effects of verapamil preconditioning on cardiac function in vitro and intracellular free Ca2+ and L-type calcium current in rat cardiomyocytes post ischemia-reperfusion injury / 中华心血管病杂志

<p><b>OBJECTIVE</b>To investigate the influences of verapamil preconditioning on cardiac function in vitro and intracellular free Ca2+ and L-type calcium current (I(Ca-L)) in rat cardiomyocytes post ischemia-reperfusion (I/R) injury.</p><p><b>METHODS</b>The isolated rat hearts in control group (37 degrees C Tyrode solution perfusion for 30 min, n = 6), I/R group (no flow for 30 min followed 30 min reperfusion with 37 degrees C Tyrode solution, n = 7) and verapamil preconditioning group [37 degrees C Tyrode solution perfusion for 10 min, adding verapamil (20 micromol/L) to Tyrode solution and perfusion for another 30 min, followed then by 30 min no flow and 30 min reperfusion, n = 7] using Langendorff perfusion system. The fluorescence intensity of intracellular Ca2+ was detected with Fluo-3/AM loading by the laser scanning confocal microscope. The I(Ca-L) was recorded via whole-cell patch clamp technique in enzymatically dissociated single rat ventricular myocytes.</p><p><b>RESULTS</b>As expected, arrhythmias and cardiac dysfunction were shown post I/R injury. The fluorescence intensities of intracellular free Ca2+ in cardiomyocytes were significantly increased compared with control group (P < 0.01). By voltage clamp protocol, peak current densities of I(Ca-L) was significantly reduced and I-V curve significantly elevated. Post I/R injury compared with control group (P < 0.01) which could be reversed by Verapamil preconditioning. Verapamil preconditioning also significantly improved diastolic and systolic functions, and reduced the incidence of arrhythmias.</p><p><b>CONCLUSIONS</b>Myocardial I/R injury might significantly impair heart functions and induce arrhythmias via cellular Ca2+ overload. Verapamil preconditioning could prevent heart I/R injury and reduce arrhythmias by decreasing influx of I(Ca-L), thereby stabilizing cardiomyocytes in myocardial stunning and avoiding occurrence of Ca2+-induced Ca2+ release during I/R injury.</p>

Prognostic analysis of chronic myeloid leukemia with Cox model and the Sokal, Hasford score / 中国实验血液学杂志

This study was aimed to analyze the prognostic factors of the patients with chronic myeloid leukemia (CML). Survival curve and survival rate of 204 patients with CML were estimated with Kaplan-Meier method and Logrank respectively. Univariate and multivariate analysis of prognostic factors carried out by Cox's regression model. The Sokal and Hasford score were used to discriminate the relative risk of Hu and IFN group. The results showed that among the 204 patients, the median survival time was 50 (32-65) months, and 5 year survival rate was 32.3% (95% CI, 23.7%-42.6%). The median survival times of IFN and Hu group were 56 (41-67) and 41 (19-56) months, and 5 year survival rates were 45.4% (95% CI, 37.5%-54.2%) and 26.8% (95% CI, 21.6%-33.3%) (P < 0.001) respectively. From the Cox stepwise regression model, Ph chromosome negative, high LDH, low Hct, percentage of peripheral blood basophils > or = 10%, marrow blasts + promyelocytes > or = 10% and presence of nucleated RBCs was associated with poor prognosis, and the treatment also played an important role in CML. According to the Sokal score, the high, intermediate and low risk rates of Hu group were 72.9%, 21.5% and 5.6%, the median survival time reached 34 (23-49) months, 43 (32-58) and 50 (38-62) months respectively; while censored by the Hasford score, the high, intermediate and low risk rates of IFN group were 17.6%, 25.1% and 57.3% respectively, the median survival time was 44 (33-57), 56 (45-70) and 66 (52-76) months respectively. It is concluded that Ph chromosome, concentration of LDH, percentage of Hct, peripheral blood basophils, marrow blasts, promyelocytes, presence of nucleated RBCs and treatment are the most important prognostic factors for CML. The Sokal score can not discriminate the relative risk of Hu group well, while the Hasford score can discriminate the relative risk of IFN group.