Purpose To observe the effects of the intervention or prevention of astragalus polysaccharide(APS)on type 1 diabetes in non-obese diabetic(NOD) mice. Methods the APS group was compared withthe normal solution(NS)group by the incidence of diabetes, the serum C-peptide levels and GAD-Ab levels,the proportion of CD4 or CD8 T subsets in splencytes, pancreatic histopathology and immunocyto-chemistry.Results It shows that the APS group has lower incidence of diabetes, higher serum C-P levels, decreaseddegree of the lymphocytic inflammation of pancreatic islets, stronger proliferation of CD8 T subsets and lowerratio of CD4/CD8 subgroup in splencytes than those of the NS group. Conclusions It proves thepreventive effects of APS on the onset of type 1 diabetes in NOD mice.

Objective:To compare and analyse the clinical outcome, advantages and disadvantages of submental artery island flap (SAIF) and free anterolateral thigh flap (ALTF) in the repair and reconstruction of tongue after radical surgery of tongue cancer.Methods:From January, 2016 to December, 2018, a total of 40 patients received tongue repair and reconstruction with either SAIF or ALTF after radical resection of tongue cancer. There were 28 males and 12 females, with an average age of 51 years old. Eighteen patients received tongue repair and reconstruction with SAIF and 22 with ALTF. Postoperative follow-up were carried out and the clinical data were collected. Swallowing, speech and softness of the tongue between the 2 repair methods were compared and statistically analysed. P<0.05 indicated a significant statistical difference between 2 groups. Results:All flaps survived. One ALTF had a venous vascular crisis. The flap survived after the removal of thrombus at the anastomotic site. Functional recovery of tongue was analysed after the follow-up of 12-48 months. It was found that there was no significant difference in speech function between the 2 groups (SAIF vs ALTF: 13 vs 15, P=0.206). The swallowing dysfunction in SAIF group was significantly higher than that of the ALTF group (SAIF vs ALTF: 15 vs 7, P=0.014). Moreover, the average time of surgery in SAIF group (3.5 h) was significantly less than that of the ALTF group (6.8 h), which had statistically significance ( P<0.05). Conclusion:The SAIF and ALTF are ideal flaps for repairing the tongue defect caused by tongue cancer surgery. SAIF features a simple surgical procedure and a short time for flap taking. ALTF provides sufficient amount of tissue to cover the scars left by the surgery, reduce donor site complications, and benefit the recovery of swallowing and speech functions.

Objective To study whether the uremic toxins accumulated long-term in uremia patients may be involved in oxidation of protein by forming advanced oxidative protein products (AOPPs). Methods Malonylaldehyde (MDA), hippuric acid (HA) and p-cresol were used as the representatives of uremic toxins. Human albumin serum (HSA), plasma specimens from normal or uremia patients were incubated respectively with MDA (10 retool/L), HA (20 mmol/L) and p-cresol (10 retool/L) or PBS (20 retool/L, pH 7.4, as control groups) at 37℃ for 30 minutes or 24 hours, respectively. Those indices such as AOPPs, protein thiol groups (Pt-SH) and dityrosine were used as biomarkers of protein injury. High performance liquid chromatography (HPLC) was employed to identify the aggregation and cross-links of modified proteins. Results AOPPs levels in all groups containing poison compounds were significantly increased by 121.5%(P<0.05) compared to that in control groups. Uremic toxins also resulted in over 14.7% loss in Pt-SH (P< 0.05) and 119.2% increment in dityrosine, respectively (P<0.05). Meanwhile, the formation of HMW-AOPPs in a time-dependent manner was observed by HPLC and cross-linked protein levels were significantly increased by 148.45%～333.3% in comparison with control groups. Conclusion Uremic toxins can directly mediate the damage of proteins by inducing the formation of HMW- AOPPs in a time-dependent manner, which is also one of the mechanism of AOPPs production in vivo besides the activation of the myeloperoxidase-H2O2-Cl pathway.

Objective To observe the porcelain treated with Nd∶YAG laser irradiation and hydrofluoric acid (HF), and to explore the influence of integrated treatment of Nd ∶ YAG laser irradiation and HF etching in the bond strength of brackets to porcelain.Methods 48 metal ceramic prostheses were randomly divided into untreated control group,HF group,grooved treatment group,0.75W laser group,1.05W laser group,1.45W laser group. All samples were bonded to the brackets.After temperature cycling test,the shear bond strength (SBS)and tensile bond strength (TBS)were measured.Results There were significant differences in SBS and TBS between various surface treatment groups and untreated control group (P < 0.01).The SBS and TBS of brackets bonded in HF group was significantly higher than those in 1.05W laser and 1.45W laser groups (P <0.05).The SBS and TBS in 1.05W laser and 1.45W laser groups were higher than those in HF group (P <0.05).The SBS and TBS in 1.05W laser group were higher than those in other groups (P < 0.05).SBS showed positive correlation with TBS (r =0.426,P =0.000).Conclusion The use of Nd∶YAG laser irradiation with the energy parameter of 1.05W and HF could increase the bonding with formation of composite resin,and the more SBS,the more TBS.

Purpose To investigate the influence of paraquat on substantial nigra and doparine levels ofstriatum in C57BL mice. Methods 39 neonatal C57BL mice were randomly divided into 5 groups andwere given paraquat or 1-methyl-4-phenyl-1,2,3,6-tetra-hydropyridine(MPTP) orally in 10 th and 11 thdays odl; ( 1 ) MPTP 0.3 mg/kg, n = 8; (2) MPTP 20 mg/kg, n = 8; (3) paraquat 0.07 mg/kg, n = 8; ( 4 )paraquat 0.36 mg/kg, n = 8; (5) normal saline, n = 7. Adult spontaneous motor activity was observed atages of 120 days, then the mice were decapitated and the contents of dopamine(DA), serotonin(5-HT), andtheir metabolites in striatum were analyzed. Meanwhile, the dopamine neuons at the mesencephalon vereobserved by the method of ABC immunohistochemistry. Results Mice given Paraquat 0.36 mg/kg andMPTP 20 rng/kg showed a marked bypoactive behavior and reduced the striatal contents of DA andmetabolites without affecting 5-HT. Immunohistochemical staining showed that the amount of dopamineneurons at the midbrain decreased. Conclusions C57BL mice exposed to great amount of paraquat duringthe neonatal period could yield the alterations of behavior and some pathological and biochemical changessimilar to parkinson disease.

Objective To explore the application value of sensitive index of nursing quality in nursing management of patients with cancer pain.Methods One hundred and eight patients with cancer pain in the First Affiliated Hospital of Xinxiang Medical University from February 2014 to March 2015 were selected as the control group;one hundred and eight patients with cancer pain in the First Affiliated Hospital of Xinxiang Medical University from April 2015 to June 2016 were selected as the study group.The traditional cancer pain nursing quality evaluation criterion was taken in the control group,and the improved cancer pain nursing quality evaluation criterion was taken in the study group to evaluate the nursing quality.The accuracy of pain assessment,awareness rate of cancer pain knowledge,degree of satisfaction to the nursing work were compared between the two groups.Results The accuracy of pain assessment of patients in the study group (90.7％,98/108)was significandy higher than that in the control group (45.4％,49/108) (x2 =51.16,P ＜ 0.05);the awareness rate of cancer pain knowledge of patients (98.1％,106/108) in the study group was significantly higher than that in the control group (72.2％,78/108) (x2 =28.83,P ＜ 0.05);the satisfaction rate of the patients in the study group (100.0％,108/108) was significantly higher than that in the control group (85.2％,92/108) (x2 =17.38,P ＜ 0.05).Conclusion The overall quality of cancer pain care can be improved by strengthening the quality evaluation of the pain assessment accuracy and the awareness rate of cancer pain knowledge in patients with cancer pain.

Objective To study the effect of oxidative modification of hydrochlorous acid (HOCl) on human serum albumin (HSA) and the relationship between the AOPPs and HOCl-treated HSA. Methods Purified HSA (60 mg/ml) was treated with HOCl (0, 1, 5, 10, 20, 30, 40, 50 and 60 mmol/L). Size-exclusion chromatography was applied to estimate molecular weights of oxidized products of HSA by HOCl and spectrum scan from 190 nm -400 nm was performed to observe the spectrum characteristics of all variants of HSA. Results Major products of HSA after exposure to HOC1 were dimer and hexmer of HSA. The first-order process could be employed to describe the oxidative dynamics of monomer and dimer of HSA oxidized by HOCl. To AOPPs formation mediated by oxidant was identified as pseudo first-order reaction. However, formation hexmer was much in accordance with second-order reaction. Hexmer was also a major contributor to AOPPs in all types of modified HSA. Spectral analysis showed that red shift of absorbance maximum of polymers of HSA occurred, suggesting that a possibility that polymers of HSA were cross linked by tyrosine residues in protein. Conclusions Protein aggregation is primary consequence of HSA after its exposure to HOCl. Hexmer of HSA is the major contributor to AOPPs.

AIM:To study the effects of astragali radix extract(ARE)on renal resistance to atrial natriuretic peptide(ANP)in rats with experimental nephrotic syndrome.METHODS:Male Sprague-Dawley rats were randomly divided into normal control,adriamycin nephropathy(ADR),ADR treated with ARE(2.5 g? kg-1? d-1)and ADR treated with benazepril(10 mg? kg-1? d-1).After 6 weeks,rats received intravenous infusion of 2% body weight isotonic saline.Urinary cGMP excretion(UcGMPV),plasma ANP level,renal PDE5 activity and protein expression were also detected.RESULTS:ARE increased UNaV while ACEI was not natriuretic.Nephrotic rats had a blunted natriuretic response and reduced rate of UcGMPV after volume expansion despite higher plasma ANP concentration.ARE increased UcGMPV and restored partly natriuretic response to volume expansion.The activity and protein abundance of renal PDE5 were high in nephrotic rats.ARE significantly reduced the PDE5 activity and protein expression.CONCLUSION:ARE may ameliorate the renal resistance to ANP in rats with adriamycin nephropathy by inhibiting the PDE5.

Objective To design a method to characterize AOPPs. Methods Carbonyl groups were used as an oxidative index to link AOPPs and oxidized protein. Plasma-AOPPs were obtained by a series of preparation as follows. The native plasma was first determined for its protein contents followed by AOPPs level evaluation. Specimen was then washed with PBS and ultrafiltrated with an ultrafilter (10 000 cut-off membrane) to obtain clean plasma-AOPPs. A size-exclusion HPLC technique was used to verify which protein was oxidatively damaged. Fractions resulted from delipidation were also examined. Results The levels of AOPPs and total carbonyl groups in patient plasma were significantly higher than those in controls; both in native/delipidated plasma and CHC13-resulted precipitate. HPLC revealed that serum albumin presented highest carbonyl levels. It was an exclusive protein with statistically significant difference between controls and patients (patients vs. controls in nmol carbonyl/mg protein: HSA: 1.510?0.067 vs. 0.791?0.048, P

Objective To study the effects of oxidants on the structure of albumin. Methods Using both AOPPs and protein carbonyl content as indices. The oxidative stress level in normal controls and uremia patients was evaluated. Albumin in plasma was purified by HPLC and then was subjected to amino acids composition assay. Results Both AOPPs level and protein carbonyl content in uremic patients were significantly higher than those in controls (P