Objective To establish an automated spectrophotometic assay for serum total and free L-carnitine with enzymatic method(CAT-BTND). Methods To optimize the reaction conditions of hydrolysis,pH and L-carnitine Acetyl-transferase (CAT)concentration in the assay,to evalute the assay method and to measure the serum L-carnitine of health adults ( n =63) and children ( n =56). Results The calibration curve for L-carnitine was linear between 4 81 and 150 ?mol/L( r =0 999).The inter and intra average CV were 5 52% and 5 90% in free carnitine,5 78% and 6 14% in octanoylcarnitine.The mean recovery rate was 98 5% and 98 4% respectively.This method was free from interference by bilirubin(≤120 ?mol/L),hemoglobin(≤7 g/L),and ascorbate(≤500 ?mol/L).Total and free carnitine and acylcarnitine reference range: adults (48 5?17 7) ?mol/L , (39 2?14 2) ?mol/L and (9 3?5 3) ?mol/L(male, n =32),(42 7?17 3) ?mol/L, (32 4?18 0) ?mol/L and (10 5?5 5) ?mol/L respectively(female, n =31).Children (age between 9～12 years old) (57 3?19 3) ?mol/L , (45 1?14 4) ?mol/L and (12 3?10 4) ?mol/L(male, n =31), (59 4?15 7) ?mol/L, (46 6?12 6) ?mol/L and (12 8?7 8) ?mol/L respectively(female, n =25). Conclusion The procedure is rapid,accurate and automatable,and could be used to diagnose L-carnitine deficiency,and to estimate and monitor the effect of treatments.

Objective To evaluate an agarose gel electrophoresis for quantitative determination of Lipoprotein(a) cholesterol and its clinical application.Methods Quantification of LP(a)-C was performed by a new agarose gel electrophoresis method that allows the separation of LP(a) by Hellen REP system and the determination of LP(a)-C by enzymatic staining of cholesterol,The results of electrophoresis method were compared with the ones of INA and ITA. The specimens of 135 health men were assayed by electrophoresis for the reference range.Results The inter and intra CV of electrophoresis method at low, middle and high LP(a) concentration specimens were 4.7%～5.3% and 5.8%～6.4%. The linearity was 0.058～1.55 mmol/L. Interference with bilirubin (

Objective To study the changes of gonadotropin releasing hormone agonist (GnRH-a) in pinopodes during luteal phase and to explore the possible mechanism of GnRH-a in luteal phase support of assisted reproductive technology (ART).Methods Totally 40 primary infertility women who were treated with ART due to male factors were enrolled,according to the order of the group they were randomly divided into experimental group and control group.On the 7th day after ovulation,the experimental group received a subcutaneous injection of 0.1 mg of GnRH-a,while the control group received a subcutaneous injection of placebo only (0.9％ salinc 2 ml),3 days later they came to the clinic again.Serum estradiol and progesterone levels were measured before and after treatment in each group.Pinopodes were collected for electron microscopic examination.Levels of ER and PR were detected by western blot.Results (1) There was no significant difference between the experimental group and the control group in the estrogen level before and after the treatment (all P＞0.05).The level of progesterone in the experimental group after treatment [(66.8± 14.9) nmol/L] was significantly higher than that before treatment(P＜0.05);also significantly higher than the same period of the control group (P＜0.05).(2) There was no significant difference in the expression of ER protein in the experimental group before and after treatment (P＞0.05).The expression of PR in the experimental group after treatment was significantly lower than that before treatment (P＜0.05);also lower than the same period of the control group (P＜0.05).(3) Expression amount of pinopodes in the experimental group after treatment was significantly higher than that before treatment [65％ (13/20) versus 25％ (5/20),P＜ 0.05],and the development trend was more mature [the percentage of maturation:75％ (15/20) versus 35％ (7/ 20),P＜0.05].Expression amount of pinopodes after treatment and the percentage of maturation in the experimental group were significantly higher than those in the same period of control group (P＜0.05).Conclusion GnRH-a in luteal phase support may play a role through the corpus luteum,which may promote the secretion of progesterone,downregulation of PR expression,promote the growth of pinopodes,and improve the endometrial receptivity.

Objective: To explore the effects of X-ray repair cross complementing gene 1 (XRCC1) polymorphism and low dose ionizing radiation exposure on radiology professionals’ peripheral blood lymphocyte micronucleus. Methods: A matched case-control study was designed. From 2013 to 2015, 1 102 radiology professionals with micronucleus test rusults, and 45 cases with present micronucleus were enroled into case group. 180 diagnostic radiology technicians detecting no micronucleus were chosen as control group, cases and controls were 1∶4 mached on gender, age ≤40 or >40 years old. According to the detection of micronucleus levels (0‰, 1‰, 2‰) , the objects of our study were divided into the reference group, the low detection group and the medium detection group. The form of radiation workers’ occupational health examination was used to collect the general baseline of the research objects, history of smoking, drinking, poisonous and harmful material exposure, past medical history, accumulated illuminated dose and lymphocyte micronucleus rates (‰) , etc. Using restriction fragment length polymorphism polymerase chain reaction (RFLP-PCR) technology for genotyping; Compared the baseline data and radiation exposure level between the differentmicrokernel detection groups; Adopted multivariate logistic regression to analysis the combination effect of XRCC1 Arg399Gln gene polymorphism and accumulated illuminated dosefor micronucleus rate. Results: The accumulated illuminated dose in the reference group, the low detection group and the medium detection group were (23.44±15.23) , (21.76±2.56) , (24.22±18.61) mSv, respectively. There was no statistically significant difference among the groups (P>0.05) . Under the dominant inheritance mode, after adjusted age, smoking and drinking factors, the results suggested that XRCC1 Arg399Gln micronucleus medium detection group compared with the reference group, Arg399Gln-GG as reference, Arg399Gln-GA+AA decreased the occurrence of micronucleus (OR=0.175, 95%CI: 0.036-0.848) . Arg194Trp and Arg280His did not affect the incidence of micronucleus (P>0.05) . Did not find the combination effect of XRCC1 Arg399Gln gene polymorphism and accumulated illuminated dose for micronucleus rate (P>0.05) . Conclusion XRCC1 Arg399Gln gene polymorphism can affect the incidence of micronucleus, and carrying the XRCC1 Arg399Gln-GA+AA genotype is a protective factor of micronucleus’s occurrence, but low dose ionizing radiation may not affect the occurrence of micronucleus independently.

Objective To study the type and corresponding clinical characteristics of primary hemophagocytic lymphohistocytosis (HLH) associated immune gene mutations in the refractory virus infection or HLH of unknown causes. Methods From December 2009 to July 2010, the patients with refractory virus infection or HLH of unknown causes were screened for the primary HLH associated immune genes mutations by DNA sequence analysis, including PRF1, UNC13D, STX11, STXBP2, SH2D1A and XIAP. The clinical characteristics and outcomes were followed up. Results Totally 25 patients with refractory virus infection or HLH of unknown causes were investigated for the 6 genes and 13 cases were found carrying gene mutations, composing of 6 of PRF1 mutation, 3 of UNC13D, and each one of STX11,XIAP, SH2D1A and STXBP2, respectively. Among the 13 cases with gene mutations, 5 suffered from Epstein-Barr virus associated HLH( EBV-HLH), 1 human herpes virus 7 associated HLH (HHV7-HLH),1 HLH without causes, 4 chronic activated EB virus infection (CAEBV) with 1 progressing to Hodgkin's lymphoma carrying abnormal chromosome of t ( 15; 17 ) (q22; q25 ) and hyperdiploid, 2 EBV associated lymphoma. Among the other 12 patients without gene mutation, 4 suffered from EBV-HLH with 1 progressing to peripheral T lymphoma, 8 suffered from CAEBV. Conclusions Primary HLH associated immune gene mutations are critical causes of refractory virus infection of unknown causes, most patients manifest as HLH,some cases appear in CAEBV and EBV associated lymphoma. DNA sequence analysis is helpful to early diagnosis and correct decision-making for treatment.

The hospital optimized the lab order administration algorithm in ICU along with full-range IT-based monitoring.The new algorithm can effectively prevent preanalytical errors and improve nurse 's satisfaction in carrying out such orders.Nurse managers should closely monitor the compliance of personal digital assistant usage and analyze the causes of error for higher compliance.With such measures, we can maximize the function to intercept potential errors of the information system, and avoid preanalytical errors ultimately.