The paper designs and implements an online exercise training system based on B /S mode and introduces the development process of ICD-10 online exercise training system , including the system requirement analysis , functional design , database design , sys-tem implementation and system testing .Moreover, it introduces key technologies used in the development process .

OBJECTIVE:To establish a method of determining the plasma concentration of capecitabine/polyethylene glycol 1000/montmorillonite (CAP/PEG1000/MMT) in rats’plasma for the study on pharmacokinetics of CAP compound in rats in vivo. METHODS:HPLC was adopted. The determination was performed on Kromasil C18 with mobile phase consisted of 0.1% glacial acetic acid-acetonitrile(73∶27),at the flow rate of 1.0 ml/min. The detection wavelength was 250 nm and column temperature was 40 ℃. The sample size was 10 μl. 18 Wistar rats were randomly divided into CAP group,CAP/MMT group(MMT as carrier)and CAP/PEG1000/MMT group(PEG1000/MMT as carrier)and ig given corresponding drugs,that equal to 200 mg/kg of CAP. Blood sample was respectively taken 15,30,60,90,120,180,240,300 and 360 min after the administration of drugs,and plasma was isolated and added with internal standard ferulic acid. The concentration of the drug in the plasma was determined by HPLC fol-lowing protein precipitation with methanol,based on which the pharmacokinetic parameters were calculated by 3p97 software. RE-SULTS:The linear range of CAP was 0.054 9-4.390 0 μg/ml (r=0.998 2) with the method recovery of 98.2%-102.1%(RSD=1.50%-3.29%, n=5) and absolute recovery of 76.2%-78.9%(RSD=2.29%-2.99%, n=5). In the above-mentioned three groups,t1/2 were(1.11±0.32),(1.57±0.32)and(1.62±0.10)h;cmax were(2.91±0.36),(0.91±0.23)and(0.91±0.14)μg/ml;AUC0-6 h were (8.70 ± 1.79),(3.76 ± 0.27) and (3.73 ± 0.25)μg·h/ml;and tmax were (0.97 ± 0.20),(1.55 ± 0.47) and (1.50 ± 0.07) h,respectively. There was no significant difference in the pharmacokinetic parameters between the CAP/MMT group and CAP/PEG1000/MMT group(P>0.05). CONCLUSIONS:The method is reliable and simple,and can be used for pharmacokinetic study of CAP/PEG1000/MMT in rats. MMT and PEG1000/MMT compound can prolong CAP acting time in the body.

Objective:To investigate the potential mechanism of electroacupuncture(EA)at bilateral Fengchi(GB20)in treating cerebral ischemia-reperfusion injury and to provide a scientific basis for future experimental research and clinical applications. Methods:Forty male specific-pathogen-free Sprague-Dawley rats were randomly divided into four groups:a normal group,a normal with EA group,a model group,and a model with EA group,with 10 rats in each group.The normal group received no intervention.The normal with EA group received EA at bilateral Fengchi(GB20).The model group underwent middle cerebral artery occlusion(MCAO)using the suture.The model with EA group underwent MCAO and received EA at bilateral Fengchi(GB20).Cerebral blood flow was monitored using a laser Doppler cerebral blood flow meter.Neurologic damage was assessed using the neurologic deficit score,and motor ability was observed using the CatWalk gait system.The expression of glial fibrillary acidic protein(GFAP)and neuronal nuclei(NeuN)protein,the neuron markers,was detected by Western blotting.The protein expression levels of GFAP and NeuN,as well as the number of positive cells in the motor cortex,were detected using immunofluorescence. Results:Compared to the normal group,the cerebral blood flow values in the model group and the model with EA group decreased by more than 50%during the modeling process(P<0.01)and returned to pre-modeling levels after reperfusion(P>0.05).The neurologic deficit score increased(P<0.05),the average motor velocity decreased(P<0.05),GFAP protein expression and the number of positive cells in the motor cortex increased(P<0.05),and the NeuN protein expression and the number of positive cells decreased(P<0.05)in the model group.Compared to the model group,the neurologic deficit score decreased(P<0.05),the average motor velocity accelerated(P<0.05),GFAP and NeuN protein expression and the number of positive cells in the motor cortex increased(P<0.01)in the model with EA group. Conclusion:EA at bilateral Fengchi(GB20)can reduce neuronal loss and increase GFAP and NeuN protein expression in the motor cortex of rats after ischemia-reperfusion,improve the motor function after ischemic stroke,and accelerate the recovery of balance and stability of the affected limbs.

Objective K93T point mutation exists in the quinoid dihydropteridine reductase ( QDPR) of OLEFT rats which catalyzes QDPR into tetrahydrobinopterin(BH4), while dihydrofolate reductase(DHFR) can reduce QDPR to BH4, which implies crosstalk between hydrobiopterin and folate metabolism.By investigating the influence of QDPR expression on DHFR expression of NRK-52E cells, the article aimed to find out the possible underlying mechanism of QDPR gene in diabetic nephropathy ( DN). Methods Western blot was performed to identify the expression level in NRK-52E cell under high glucose ambience and DHFR pro-tein expression of OLETF rats.NRK-52E cells were transfected by the lentivirus to establish no-load overexpression, overexpressed QDPR and knockdown QDPR models.Each group was given 5.4 mmol/L normal sugar medium and 30mmol/L in high glucose ambi-ence for 72 hours'cell cultivation to simulate DN model.Observation was made on the influence of QDPR gene expression levels on DHFR in high glucose ambience. Results The western blot analysis revealed that DHFR protein decreased in NHG group( [0.33 ± 0.16] vs [0.64 ±0.5], P<0.05) and OLETF rats cortex ([0.56 ±0.16] vs [1.03 ±0.12], P<0.01).In high glucose ambi-ence, compared with LV-OCON-HG group, the protein expression of DHFR was significantly decreased in LV-QDPR-HG group ([0.12 ±0.09] vs [0.63 ±0.08], P<0.01).No difference was found in the comparison of DHFR expression levels between LV-SHQDPR-HG and LV-SHCON-HG group. Conclusion DHFR protein expression decreases in NRK-52E cells of high glucose and LOLETF rat model, which suggests that DHFR protein plays an important role in the development of DN.QDPR overexpression leads to the decreased expression of DHFR, which implies that overexpressed QDPR influences the occurrence and process of DN by down-regulating DHFR expression level.

Objective Evaluation of cerebral blood flow in patients with transient ischemic attack (TIA) using cerebral CT perfusion imaging.Methods CT perfusion scan was performed on a consecutive series of 20 patients with clinical definite TIA.Following their initial CT scan at acute stage of TIA, patients underwent two repeat CT perfusion scanning of region of interest at acute stage and one month after symptom remission.Results Mild to moderate decrease in regional cerebral blood flow (rCBF) and unchanged or mildly decrease in regional cerebral blood volume (rCBV) were observed at acute stage in the majority cases.Normal cerebral perfusion was found in 12 cases and mild to moderate decrease of rCBF in 8 cases one month after TIA.During the one-year follow-up period, all of 12 cases with normal cerebral perfusion did not have recurrence while among 8 cases with mild to moderate decrease of rCBF at initial scan, 6 cases had recurrent TIA or cerebral infarction and 2 cases did not have recurrence.Patients with more severe cerebral perfusion defects usually had a shorter interval time between two attacks.Conclusions Intensive intervention should be performed on patients with severe and long lasting decrease of cerebral perfusion.

Objective To investigate the protective effect of human umbilical cord mesenchymal stem cell-derived exosome (hucMSC-Exo) on renal ischemia-reperfusion injury (IRI), and to clarify the critical role and regulating mechanism of transient receptor potential canonical (TRPC) 6/poly adenosine-diphosphate-ribose polymerase (PARP) 1 signaling pathway during this process. Methods The hucMSC-Exo was extracted by ultracentrifugation, and identified by transmission electron microscope (TEM), nanoparticle tracing analysis and Western blot. SD rats were randomly divided into the sham operation group (group S), sham operation+TRPC6 inhibitor SKF96365 group (group SS), renal IRI group (group IRI), exosome treatment group (group EXO) and exosome +TRPC6 inhibitor SKF96365 group (group ES), with 6 rats in each group. Serum creatinine and blood urea nitrogen levels were detected. Pathological changes of renal tissues were observed by hematoxylin-eosin (HE) staining and Paller score was calculated. The expression levels of key molecules of necroptosis in rat renal tissues, including receptor-interacting protein kinase (RIPK)1, RIPK3 and mixed-lineage kinase domain-like protein (MLKL), TRPC6 and PARP1, were detected by Western blot. Results Typical saucer-like structure was observed under TEM. Nanoparticle tracing analysis showed that the average diameter of the extracted substance was 125.9 nm. Western blot revealed that the surface markers of CD9, CD63 and CD81 were positively expressed, confirmed that the extracted substance was exosome. Compared with group S, the serum creatinine and blood urea nitrogen levels were up-regulated, the pathological damage of renal tissues was worsened, Paller score was elevated, the relative expression levels of TRPC6 and PARP1 proteins were down-regulated, and the relative expression levels of RIPK1, RIPK3 and MLKL proteins were up-regulated in group IRI (all P < 0.05). Compared with group IRI, the serum creatinine and blood urea nitrogen levels were down-regulated, the pathological damage of renal tissues was mitigated, Paller score was decreased, the relative expression levels of TRPC6 and PARP1 proteins were up-regulated, and the relative expression levels of RIPK1, RIPK3 and MLKL proteins were down-regulated in group EXO (all P < 0.05). Compared with group EXO, the serum creatinine and blood urea nitrogen levels were up-regulated, the pathological damage of renal tissues was aggravated, Paller score was increased, the relative expression levels of TRPC6 and PARP1 proteins were down-regulated, and the relative expression levels of RIPK1, RIPK3 and MLKL proteins were up-regulated in group ES (all P < 0.05). Conclusions hucMSC-Exo may alleviate the necroptosis induced by renal IRI in rat models, which is related to the activation of TRPC6/PARP1 signaling pathway.

Objective:To evaluate the role of nuclear factor E2-related factor 2 (Nrf2)/heme oxidase-1 (HO-1) in reduction of renal ischemia-reperfusion (I/R) injury by the human umbilical cord mesenchymal stem cells (hucMSCs)-derived exosomes (hucMSCs-exo) in mice.Methods:The hucMSCs were cultured, and exosomes were extracted and identified by transmission electron microscopy, nanoparticle tracking analysis and Western blot. Thirty-six male SPF-grade C57BL/6 mice, weighing 20-25 g, were used. Thirty mice were selected and divided into 5 groups ( n=6 each) by a random number table method: sham operation group (Sham group), sham operation + Nrf2 inhibitor ML385 group (Sham + ML385 group), renal I/R group (I/R group), renal I/R + exosome group (I/R+ EXO group), and renal I/R + exosome + Nrf2 inhibitor ML385 group (I/R+ EXO+ ML385 group). A model of renal I/R injury was prepared by clamping the bilateral renal pedicles for 45 min followed by perfusion in anesthetized animals. ML385 30 mg/kg was intraperitoneally injected at 45 min before preparing the model in Sham+ ML385 group and I/R+ EXO+ ML385 group, and hucMSCs-exo 100 μg was injected via the tail vein at 15 min before reperfusion in I/R+ EXO group and I/R+ EXO+ ML385 group. Serum blood urea nitrogen (BUN) and creatinine (Cr) concentrations were detected at 24 h of reperfusion. The renal tissues were obtained for examination of the pathological changes and for determination of contents of interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α) and malondialdehyde (MDA), superoxide dismutase (SOD) activity and reactive oxygen species (ROS) levels and expression of Nrf2 and HO-1 protein and mRNA (by Western blot and quantitative real-time polymerase chain reaction). The left 6 mice were allocated to sham operation group (Sham-IM group, n=3) and renal I/R group (I/R-IM group, n=3) by a random number table method for VISQUE in living imaging observation. Results:The exosomes showed a typical cup-shaped morphology with a transmission electron microscope, the nanoparticles tracked and analyzed the average diameter of the exosome, with an average diameter of 96.7 nm, and the positive expression of surface markers CD9, CD63 and TSG101 was detected using Western blot. The renal fluorescence intensity value was significantly increased in I/R-IM group as compared with Sham-IM group ( P<0.05). Compared with Sham group, the serum BUN and Cr concentrations were significantly increased, the contents of IL-6, TNF-α and MDA and ROS levels were increased, the activity of SOD was decreased, the expression of Nrf2 and HO-1 protein and mRNA was down-regulated ( P<0.05), and the pathological changes of renal tissues were aggravated in I/R group, and no significant change was found in serum BUN and Cr concentrations in Sham+ ML385 group ( P>0.05). Compared with I/R group, the serum BUN and Cr concentrations were significantly decreased, the contents of IL-6, TNF-α and MDA and ROS levels were decreased, the activity of SOD was increased, the expression of Nrf2 and HO-1 protein and mRNA was up-regulated ( P<0.05), and the pathological changes of renal tissues were significantly attenuated in I/R+ EXO group. Compared with I/R+ EXO group, the serum BUN and Cr concentrations were significantly increased, the contents of IL-6, TNF-α and MDA and ROS levels were increased, the activity of SOD was decreased, the expression of Nrf2 and HO-1 protein and mRNA was down-regulated ( P<0.05), and the pathological changes of renal tissues were aggravated in I/R+ EXO+ ML385 group. Conclusions:The mechanism by which hucMSCs-exo reduces renal I/R injury may be related to activation of the Nrf2/HO-1 signaling pathway in mice.

Ischemia-reperfusion injury (IRI) refers to the reperfusion injury caused by the recovery of blood supply of ischemic tissues or organs, which commonly occurs in organ transplantation and other surgical procedures. IRI may cause a series of severe clinical issues, such as delayed graft function, acute kidney injury, myocardial infarction, ischemic stroke and circulatory arrest, etc. These events yield high incidence and fatality. At present, no effective solution has been available. Transient receptor potential canonical 6 (TRPC6), a member of Ca²⁺ channel family, is highly expressed in multiple types of cells. It may adjust many physiological functions by regulating intracellular Ca²⁺ concentration, which has become an important target for developing therapeutic drugs for multiple diseases. In this article, research progresses on the introduction and function of TRPC6, the association between TRPC6 and IRI and the therapeutic prospect of TRPC6 targeted drugs in IRI were reviewed, aiming to provide novel insights into the prevention and treatment of IRI during organ transplantation

Objective To study the effect of high quality nursing service on independent living ability and psychological status of post-stroke depression patients.Methods A total of 130 postdepression patients were randomly divided into observation group and control group.The observation group received high quality nursing service and control group received routine nursing.The scores of activity of daily living scale(ADL) and Hamilton depression scale (HAMD) were used to assess the curative effect before and after intervention in two groups.Results Compared with intervention before,the scores of ADL and HAMD in two groups were both decreased after intervention (P ＜ 0.05),but the observation group had lower scores than control group (P ＜ 0.05).Conclusion High quality nursing service can effectively improve independent living ability and relieve the feelings of depression in post-stroke depression patients.

Objective To study the effect of high quality nursing service on independent living ability and psychological status of post-stroke depression patients.Methods A total of 130 postdepression patients were randomly divided into observation group and control group.The observation group received high quality nursing service and control group received routine nursing.The scores of activity of daily living scale(ADL) and Hamilton depression scale (HAMD) were used to assess the curative effect before and after intervention in two groups.Results Compared with intervention before,the scores of ADL and HAMD in two groups were both decreased after intervention (P ＜ 0.05),but the observation group had lower scores than control group (P ＜ 0.05).Conclusion High quality nursing service can effectively improve independent living ability and relieve the feelings of depression in post-stroke depression patients.