Objective To verify the application value of the Oxford classification in child IgA nephropathy (IgAN) .Methods The clinical and pathological data by renal biospy in 123 children patients with IgAN from January 2010 to September 2013 were collected and retrospectively analyzed .84 cases were followed up .The results were divided into 4 grades(A ,B ,C ,D) based on the manifestations at the end of follow‐up .Finally the pathological analysis was performed .Results Among 123 cases ,the clinical man‐ifestations were dominated by nephrotic syndrome (42 .28% ) ,followed by hematuria complicating proteinuria (24 .39% ) .The scores of 4 pathological indexes were dominated by M 1 (82 .11% ) ,E1 (53 .66% ) ,S0 (59 .35% ) and T0 (82 .11% ) respectively ;the mesangial cells proliferation and endocapillary proliferation were related with the hematuria severity (P<0 .01);mesangial cells pro‐liferation ,endocapillary proliferation and renal tubule atrophy/interstitial fibrosis were related with the edema occurrence ( P<0 .05);the mesangial cells proliferation ,segmental glomerulosclerosis and renal tubule atrophy/interstitial fibrosis were related with the average arterial pressure increase(P<0 .05) .4 pathological indexes were related with 24 h urinary protein amount(P<0 .01);the segmental glomerulosclerosis and renal tubule atrophy/interstitial fibrosis were related with the decrease of the estimated glo‐merular filtration rate(P<0 .01) .84 cases were successfully followed up ,the clinical outcome was grade A in 43 cases(51 .19% ) , grade B in 30 cases(31 .71% ) ,grade C in 8 cases(9 .52% ) and grade D in 3 cases(3 .57% ) .Only the renal tubule atrophy/intersti‐tial fibrosis was related with prognosis(P<0 .05) .Conclusion The Oxford classification has certain relation with clinical indexes of children with IgAN .Only the renal tubule atrophy/interstitial fibrosis are the risk factors of prognosis .

Secondary hyperparathyroidism is the most common complication of patients with chronic kidney disease.For patients poorly responding to medical treatment,parathyroidectomy would be the best choice.This article reviews the indications and modalities of surgical treatment for secondary hyperparathyroidism in patients with chronic kidney disease.

Objective To establish a arsenic cerium catalytic rate method for determination of urinary iodine,and increase the linear range of urinary iodine determination.Methods Standard series and urine samples after digestion treatment,were tested using dynamics function of spectrophotometer to record the curve of absorbance value (A) change with time (t) during arsenic cerium catalytic reaction for each measurement system,choice (A1,t1) and (A 2,t2) on this curve and calculating the reaction rate (v),v =(lgA1-lgA2)/(t2-t1).Through the determination of the standard series it could calculate regression equation of iodine concentration (C) with X:C =a ± bX,X =1 000 (v-v0),and the v0 is the reaction rate of reagent blank.Results (① C and X were positively correlated.The standard series linear range was 0-1 200 pμg/L and correlation coefficient r was higher than 0.999 1.The minimum detection limit was 3.9 μg/L (0.25 ml urine).②)Precision:5 urine samples (A,B,C,D,E) were selected within the range of 0-1 200 μg/L and the measured value were (72.3 ± 2.7),(148.2 ± 5.2),(210.5 ± 4.4),(562.7 ± 6.8),and (899.3 ± 8.0) μg/L.The relative standard deviation (RSD) was between 0.9％-3.8％.(③)Accuracy:4 samples (A,B,C,D) were measured for standard addition recovery test,recovery was between 94.2％-107.2％;urinary iodine standard material [the given values were (67.9 ± 9.0),(142.0 ± 10.0),(195.0 ± 10.0),(558.0 ± 17.0),(885.0 ± 28.0) μg/L] were determined and the results were in the range of uncertainty of the standard material.④Method contrast:with the national health standard method (method for determination of iodine in urine by arsenic cerium catalytic spectrophotometry) to determinate 120 urine samples,the results showed that there were 60 urine samples within 0-300 μg/L,60 urine samples were more than 300 μg/L.Then rate method was used to test the 120 urine samples.For the 60 samples within the scope of 0-300 μg/L,the determination results of the two methods were positively correlated (r =0.994,P ＜ 0.01);the results of the rate method were lower than those of the standard method and the difference was statistically significant (t =2.047,P ＜ 0.05).But the average deviation was only 2.1 μg/L,for the determination of urine iodine there was no practical significance;for the 60 samples higher than 300 μg/L,the determination results of the two methods were positively correlated (r =0.993,P ＜ 0.01) and the difference was not statistically significant (t =-1.092,P ＞ 0.05).Conclusions Arsenic cerium catalytic rate method has increased the linear range of urinary iodine determination.Using this method,the vast majority samples can be tested directly without dilution,thereby reducing the workload for determination of urine iodine.

Objective To study the efficacy of L-3,5-diiodotyrosine (DIT) and inorganic iodine (KIO3) in iodine-deficiency Wistar rats.Methods Sixty Wistar rats,weighting about 160-180 g,were divided into two groups according to body weight by the random number table method:iodine-deficiency model (40 rats) was fed with low-iodine food (the iodine content was 35.9 μg/kg);optimal-iodine model (20 rats) was fed with low-iodine food and given with KIO3 water (the iodine content was 18 mg/L) 0.5 ml by intragastric once a day.Model was established for 3 months.Iodine-deficiency model was subdivided into low iodine (LI) group,KIO3 group and DIT group,eight,nine,ten rats in each group;from optimal-iodine model,nine rats were randomly selected as optimal iodine (NI) group.LI group was fed with low-iodine food;KIO3 group was fed with low-iodine food and given with KIO3 water (the iodine content was 18 mg/L) 0.5 ml by intragastric once a day;DIT group was fed with low-iodine food and given with DIT water (the iodine content was 18 mg/L) 0.5 ml by intragastric once a day;NI group was fed with low-iodine food and given with KIO3 water (the iodine content was 18 mg/L) 0.5 ml by intragastric once a day.After 3 months,24-hour urine of the rats was collected.According to the method for determination of iodine in urine by As3 +-Ce4+ catalytic spectrophotometry (WS/T 107-2006),iodine content in urine was detected.Rats were anesthetized intraperitoneally with 25％ urethane,blood from abdominal aortic was collected to determinate the serum thyroid hormone [total triiodothyronine (TT3),total thyroxine (TT4),free triiodothyronine (FT3),free thyroxine (FT4)] level in rats by automatic electrochemical luminescence immunoassay.All the rats were sacrificed to analyze the thyroid weight.Results ① The urine iodine showed significant differences in the four groups (x2 =25.24,P ＜ 0.05).The median of urine iodine concentration in the LI,NI,KIO3 and DIT groups were 3.00,286.14,223.37,214.33 μg/L,respectively.The urine iodine concentration in LI group was significantly lower than those of other three groups (all P ＜ 0.05).② The serum TT3,TT4,FT3,FT4 levels showed significant differences in the four groups (F =63.48,140.73,130.20,365.27,all P ＜ 0.05).And the hormone levels in KIO3 group were lower than those of the DIT group [TT3:(1.57 ± 0.20) vs.(1.97 ± 0.18) mmol/L,TT4:(51.23 ± 4.90) vs.(71.94 ± 5.27) mmol/L,FT3:(5.34 ± 0.45) vs.(6.98 ± 0.33) pmol/L,FT4:(26.18 ± 2.30) vs.(35.47 ± 2.28) pmol/L,all P ＜ 0.05].③The color of thyroid in KIO3 and DIT groups became pale pink.The absolute and relative thyroid weight showed significant differences in the four groups (F =225.05,345.40,all P ＜ 0.05).The absolute thyroid weight [(31.76 ± 1.75) mg] and relative thyroid weight [(11.69 ± 3.47) mg/100 g] in DIT group was lower than that of the KIO3 group [(36.31 ± 5.23) mg,(12.83 ± 4.38) mg/100 g,all P ＜ 0.05].Conclusion Animal experimental results show that DIT has a better iodine-supplementing efficacy than that of KIO3.

Objective To investigate the protective effects of recombinant human erythropoietin (rHuEPO) on caecal ligation and puncture (CLP)-induced acute kidney injury (AKI).Methods A total of 260 healthy male Sprague-Dawley rats (250-300 g) were randomly divided into 6 groups:normal control group,sham group,CLP model group,the large dose rHuEPO (5000 U/kg)group,the middle dose rHuEPO (1000 U/kg) group,and the small dose rHuEPO (500 U/kg) group.The rat models of sepsis were established by CLP.In treatment groups,rats were treated with rHuEPO through caudalis injection after CLP surgery.Each group was divided into 2-,6-,12-,24-,36-hour subgroups with 10 rats.Rats were sacrificed and the tissue samples including kidney and blood samples were collected.The kidney function,plasma cytokines [interleukin 6 (IL-6) and tumor necrosis factor alpha (TNF-α)],kidney injury moleclue 1 (KIM-1) and inducible nitric oxide synthase (iNOS)were measured.Cytokines were determined by ELISA method.The expression of nuclear factor-kappaB (NF-κB) protein in kidneys were detected by immnunohistochemistry method.Pathological changes of kidney tissues were observed by light and transmission electron microscopy for cytokine content and apoptosis.Results Compared with CLP model group,renal function,the levels of TNF-α,IL-6,KIM-1 and iNOS in serum,the expression of NF-κB,significantly decresed in large dose rHuEPO group (all P ＜ 0.05).rHuEPO also lessened the histological changes in large dose group.rHuEPO did not lessen the histological changes in others.Conclusion rHuEPO can inhibit the levels of TNF-α,IL-6 and iNOS in serum,thus modify the inflammatory response and provide protective effects against acute kidney injury induced by sepsis.

Objective To investigate drug resistance and genotypes of methicillin-resistant Staphylococcus aureus (MRSA) isolated from intensive care unit (ICU). Methods MRSA strains were isolated from patients, medical staff and environment of hospital ICUs. Disk diffusion (K-B method) was used for drug resistance testing; Staphylococcal cassette chromosome mec (SCCmec) and Staphylococcal protein A (spa) typing methods were used for genotyping and identifying the homology. Results There were 78 strains of Staphylococcus aureus isolated including 62 isolates of MRSA, which were mainly from the burn ICU (22, 35.48%). Among 62 MRSA strains, 50 were hospital acquired strains, in which 43 isolates were of SCCmec Ⅲ, 4 of SCCmec Ⅰ and 3 of SCCmec Ⅱ. Twelve isolates could not be typed. Twenty-eight out of 37 hospital acquired isolates were typed by spa typing as SCCmec Ⅲ-t030, which belonged to the same clone. Conclusion MRSA in ICU is multi-drug resistant and SCCmec Ⅲ-t030 is the most prevalent genotype, which indicates that clinical MRSA strains and environmental MRSA strains may be homologous.

Objective To investigate the impact of systolic blood pressure (SBP) at admission on in-hospital outcomes in patients with ST elevated acute myocardial infarction (STEMI).Methods Data of 336 STEMI patients admitted from September 2008 to May 2011 were retrospectively analyzed.Total of 336 STEMI patients were classified into 4 groups as per the level of SBP at admission:group A (＜ 101 mmHg,n =59) ; group B (101-120 mmHg,n =109) ; group C (121-140 mmHg,n =98) and group D (＞ 140 mmHg,n =69).And clinical features,coronary angiography (CAG) findings,the strategy of treatment,complications and hospital mortality were compared among 4 groups with SPSS version 18.0 software.Results The mortality rates of the four groups were 18.64％,1.83％,4.08％,1.45％,respectively.The patients with SBP ＜ 106 mmHg were in greater risk of in-hospital mortality,Killip class ≥ 3 at admission,shock and refractory arrhythmias,and more patients in this group needed pacemaker and intraaortic balloon pump (IABP) treatment than patients in other 3 groups.While there was no significant difference in mortality rate between other three groups.Multivariate logistic regression analysis demonstrated SBP ＜ 101 mmHg (OR =6.368,P =0.002) and peak value of troponin Ⅰ (OR =3.781,P =0.008) were independent risk factors of in-hospital death in STEMI patients.Conclusions The STEMI patients with SBP ＜ 101 mmHg at admission had higher mortality rate and low SBP at admission had great prognostic value in short-term outcomes of STEMI.

Objective To investigate the protective effect of melatonin and its possible mechanism for repairing in the immature white matter damage due to brain hypoxia-ischemia (HI).Methods Forty-eight three-day SD rats after birth were randomly divided into 3 groups:sham-operated(SHAM) group,HI group and melatonin treatment(MT) group.Periventricular white matter damage (PWMD) to animal models were estabished according to Rice modeling.MT group was treated with melatonin pre-operatively,immediately postoperation,1 hour postoperation and 24 hours postoperation via intraperitoneal injection,and the other groups were injected with the same volume of dissolvent.The rats were executed by decollation after 2 days and 14 days.The histological changes in periventricular white matter were observed by HE staining and immunohistochemistry.Results For the 3 groups,the structure in ope-ration side of the white matter in the peripheral ventricles of the brain 2 days postoperation were significant different (P ＜0.05).The O4 positive cells decreased one by one/greatest in the SHAM group[(75.548 ± 7.333)/hpf] followed by MT group [(59.971 ± 3.635)/hpf],and HI group [(40.511 ± 2.848)/hpf] (P ＜ 0.05).The expression of Casepase-3 increased in the SHAM group (107.724 ± 10.266),MT group (132.289 ± 8.537),and HI group (202.168 ± 14.367),and the difference was statically significant (P ＜ 0.05).Ventricular index was greater in operation side of the white matter in the peripheral ventricles of the 14-day-brain in the SHAM group(0.928 ±0.063),MT group (1.813 ± 0.110),HI group (2.752 ± 0.201),increasingly,while absorbance value of myelin basic protein decreased one by one in sequence(39.504 ± 1.673,21.729 ± 1.614,11.344 ± 1.118).Conclusions MT plays a role in protecting the periventricular white matter via inhibiting the apoptosis of oligodendrocyte progenitor cell,and thus benefits the PWMD.

Objective To investigate the protective effects of recombinant human erythropoietin (rHuEPO) on caecal ligation and puncture (CLP)-induced acute liver injury.Methods Ninety-six healthy male Sprague-Dawley rats weighing 250-300 g were randomly divided into 3 groups:normal control group (sham group,n =32),CLP model group (sepsis group,n =32) and rHuEPO treatment group (n =32).The rat model of sepsis was established by caecal ligation and puncture.In treatment group,rats were treated with rHuEPO 5000 U/kg administered through caudalis vein after CLP procedure.Continuous observation was carried out until 24 h after modeling.Of each group,8 rats were sacrificed at 2 h,6 h,12 h and 24 h,respectively,and then the liver tissue samples and blood samples were collected.Blood samples were assayed for determining the levels of serum cytokines [tumor necrosis factor-alpha (TNF-α)],and inducible nitric oxide synthase (iNOS) by using the enzyme-linked immunoadsorbentassay (ELISA) method.The levels of serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were also detected.Histopathological changes of liver tissues were observed under optical and transmission electron microscopy.Results (①)The levels of ALT,AST,TNF-a,iNOS in serum of rats in control group were lower than those in model group and rHuEPO group (P ＜0.01).The levels of TNF-α,IL-6 and iNOS in serum of rats in rHuEPO group were decreased significantly compared with model group (P ＜ 0.01).(②) The optical microscopy and the transmission electron microscopy showed hepatocyte edema,liver focal necrosis,inflammatory cell infiltration in portal area and severe congestion of interlobular veins,hepatocyte karyopyknosis,mitochondrial and endoplasmic reticulum (ER) obviously decreased in sepsis group at 24 h.Hepatic injury was attenuated after employment of rHuEPO.Conclusions Recombinant human erythropoietin can inhibit the levels of ALT,AST,TNF-a,iNOS in serum,thus modifying the inflammatory response and providing protective effects against acute liver injury in the wake of infection.

Objective To investigate the protective effect of Ebselen on mitochondrial damage and its influence to Cytochrome C expression and the neuronal apoptosis after spinal cord injury in rats. Methods Sixty adult SD rats were ran-domly divided into 5 groups (12 each group). Spinal cord injury model was made using Allen's method. Sham operation group received only laminectomy;SCI group received laminectomy and spinal trauma;Saline group received saline injection intraperitoneally (0.1%DMSO) after injury;methylprednisolone group received 30 mg/kg methylprednisolone injection intra-peritoneally, ebselen group received 10 mg/kg ebselen injection intraperitoneally. The malonaldehyde (MDA) and glutathi-one (GSH)level at the injured sites of the spinal cord were detected 24 hours after trauma, and the expression level of Cyto-chrome C was also observed. Finally, neuronal apoptosis was identified by TUNEL staining. Results MDA level in the Eb-selen group was significantly lower than that in the SCI group, and GSH level was significantly elevated in the Ebselen group compared with SCI group (P<0.01). Expression of Cytochrome C in Ebselen group was lower than that in SCI group shown by Western blot, and the neuronal apoptosis in Ebselen group reduced significantly too compared with SCI group (P<0.01). Conclusion Ebselen can alleviate peroxidation,prohibit expression of Cytochrome C and inhibit neuronal apoptosis,thus it shows a protective effect to experimental acute SCI.