BACKGROUND:Nowadays, the component content of assisted reproductive culture medium and their test methods are unclear in the quality standards. We need to establish the test methods to fil this vacancy, so as to control the quality of assisted reproductive culture medium effectively. OBJECTIVE:To establish an evaluation method for determination of fructose and glucose in assisted reproductive culture medium, thereby based on which to establish the quality standards. METHODS:High performance liquid chromatography-differential refractive index detector was adopted and Rezex RCM-Monosaccharide Ca2+(8%) (300.0 mm×7.8 mm) column was used. The mobile phase was ultrapure water at the flow rate of 0.6 mL/min and the temperature of 80 ℃. RESULTS AND CONCLUSION:Resolution of the peaks of glucose and fructose was 3.2. The linear ranges of glucose and fructose were 30.1-502 mg/L (r=0.999 8) and 102-408 mg/L (r=0.999 8), respectively. The relative standard deviation of reproducibility test was 0.17%and 0.40%, respectively. The relative standard deviation of stability test was 0.22%and 0.73%, respectively. The glucose group and fructose group average recovery rates were 1.22%and 1.38%, respectively. The methodology of High performance liquid chromatography-differential refractive index detector accorded with the requirements. The glucose contents of samples 1 and 2 were 96.7 mg/L and 99.6 mg/L, respectively. The fructose contents of samples 1 and 2 were 208.5 mg/L and 197.4 mg/L, respectively. A reliable, simple, and accurate method was provided for the quality control of assisted reproductive culture medium, which fil s the domestic vacancy in the quality standards for assisted reproductive culture medium.

Objective:To evaluate the value of synthetic MRI combined with DWI in the diagnosis of benign and malignant breast lesions.Methods:The data of 184 consecutive patients with suspected breast lesions in Yunnan Cancer Hospital from July to September 2019 were prospectively analyzed. All patients were randomly assigned to training group ( n=110) and validation group ( n=74), and underwent conventional MRI and synthetic MRI respectively before and after contrast injection. At the maximum slice of the lesion, the ROI was drawn along the edge and recorded as "tumor". In the solid area with the most obvious tumor enhancement, the second ROI was drawn and recorded as "local". At the same time, ADC values (ADC local and ADC tumor) and relaxation time values (T local and T tumor) were measured. T and T + represented the relaxation time value of the ROI pre-and post-contrast scanning. ΔT% represented the relative change rate in T value between pre-and post-contrast scanning.The rank sum test was used to test the quantitative parameters of benign and malignant breast lesions in the training group and the validation group, and the variables with P<0.05 were included in the binary logistic regression analysis to screen the independent variables and establish the prediction model. The area under ROC curve was used to evaluate the discrimination of parameters and models. The clinical applicability of model was analyzed by decision curve analysis (DCA). Results:In the training group, univariate analysis showed that there were significant differences in T 1tumor, T 1+tumor, ΔT 1% tumor, T 2local, T 2+local, T 2tumor and T 2+tumor, ADC local, ADC tumor between benign and malignant breast lesions ( P<0.05). Multivariate logistic regression analysis showed that T 1+tumor, ΔT 1% tumor, T 2tumor, ADC local, ADC tumor were independent variables in the diagnosis of breast cancer. The relaxation time model (model A: T 1+tumor, ΔT 1% tumor, T 2tumor) and ADC model (model B: ADC local, ADC tumor) established by combining the above variables had the same diagnostic efficiency (AUC=0.905, 0.914, Z=-1.874, P=0.062), and the multi-parameter combination model (model C: T 1+tumor, ΔT 1% tumor, T 2tumor, ADC local, ADC tumor) had the highest diagnostic efficiency (AUC=0.965). DCA analysis showed that when the threshold probability ranges between 21%-99% (training cohort) and 15%-99% (validation cohort), the net benefit of model C was better than model A and B. Conclusion:The multi-parameter combined prediction model established based on the relaxation time value and ADC can identify breast cancer efficiently and can be used as an auxiliary diagnostic tool.

Objective To explore acute toxicity of succimer on mice.Methods Twenty Kunming mice(10 males and 10 females) weighting approximately (21.2?2.3)g were acclimatized for 3 days prior to dosing,then were divided into control group and experiment group with 10 mice in each group according to body weight.Fasted for 12 hours,the mice in experiment group received intragastric administration of 160mg DMSA in deionized water in 24 hours,and the control group received the same volume of deionized water,and then they were observed for 7 days.Blood was collected into heparinized-tubes by removal of eyeball.All mice were sacrificed and brain,heart,liver and kidney were removed and washed with normal saline.The activity or amount of BUN,Scr,AST,ALT,SOD, GSH-PX and MDA were analyzed.Results (1)Given 160rag DMSA in 24 hours,gastrointestinal symptoms were main side effects.During the observation,experiment group lost weight due to the decrease of food-intake ,and some mice had slight hydroabdomen.(2)High dose of DMSA caused a significant inhibition of GSH-PX(P0.05).The hepatic cell was damaged accord- ing to the significant raise of MDA in liver(P0.05),which was related to acute toxicity on liver.Conclusion Succimer could inhibit the antioxidarrt systems and could do damage to liver and kidney.

The purpose of this study was to evaluate the efficiency of Japan Langerhans Cell Histiocytosis Study Group (JLSG) Protocol in treatment of children suffering from multiple system langerhans cell histiocytosis (MS-LCH). The clinical features, therapeutic response and prognosis of 11 children who were diagnosed and treated by JLSG in our department during October 2004 through October 2011 were analyzed. Among all 11 cases, 8 males and 3 females, the age at diagnosis was from 3 month to 6.5 years old with a median age of 3 years old. There were 10 cases of LCH with multi-system involvement (MS-LCH) and 1 case of single-system involvement (SS-LCH). Among those MS-LCH patients, 5 patients had risk organ involvement, and the other 5 patients did not develop risk organ involvement. All patients had been treated with JLSG protocol. The results showed that 4 cases achieved good response after 6-week induction treatment and the time of drug discontinuation were 5 - 20 months without relapse; 3 cases achieved partial response after 6-week induction treatment, among them 1 case did not relapse after discontinuation of drugs for 19 months, 1 case was still receiving maintenance treatment, 1 case abandoned induction treatment; 4 patients got no response (NR) or progressive disease after 6-week of induction treatment and were switched to salvage therapy, among them, 2 patients had stopped treatment for 2 - 20 months without relapse, 1 patient was still receiving maintenance treatment, one had changed to another therapy. It is concluded that the most of childhood LCH can be effectively controlled by immunochemical therapy based on the JLSG protocol. For children with LCH who has a poor response after 6-week induction treatment, LCH can still be well controlled if switched to salvage treatment.
Antineoplastic Protocols ; Child ; Child, Preschool ; Female ; Histiocytosis, Langerhans-Cell ; drug therapy ; Humans ; Infant ; Male ; Retrospective Studies ; Treatment Outcome

To study preliminarily the effect of Jiawei Bazhen decoction combined with oxytocin in promoting cervical ripening of full-term pregnancy women who were in the deficiency of qi and blood type through the syndrome differentiation of traditional Chinese medicine (TCM). 180 patients that met the inclusion criteria of the study were randomly divided into three groups: the control group(oxytocin group), the treatment group (Jiawei Bazhen decoction combined with oxytocin group), the blank control group (expected and observation group). Cervical maturity score (Bishop score), vaginal and cervical secretions fetal fibronectin (FFN), the result of induced labor, the result of mother and baby were observed in each group before and after treatment. The result comes out that the cervical Bishop score of pregnant women for treatment group were significantly higher than the control group and blank control group after treatment (P < 0.05). The FFN of pregnant women for the treatment group were significantly different from the control group and blank control group after treatment (P < 0.05). The pregnancy outcome of the three groups: the labor rate and rate of vaginal delivery of the treatment group were higher than the other two groups, and the difference was statistically significant (P < 0.05). The cesarean section rate of the treatment group was significantly lower than the other two groups, the difference was also statistically significant (P < 0.05). The three groups did not appear the phenomenon of neonatal asphyxia. Jiawei Bazhen decoction combined with oxytocin is effective in producing cervical ripening and induce labor. It is convenient, safe and reliable, for it is no obvious adverse effects on mother and fetus, but effective in reducing the rate of cesarean section, and playing a positive role in promoting natural delivery.
Adult ; Cervical Ripening ; drug effects ; metabolism ; Drug Therapy, Combination ; Drugs, Chinese Herbal ; administration & dosage ; Female ; Fibronectins ; secretion ; Humans ; Labor, Induced ; Oxytocin ; administration & dosage ; Pregnancy ; Pregnancy Complications ; drug therapy ; metabolism ; physiopathology ; Pregnancy Outcome ; Qi ; Vagina ; drug effects ; secretion ; Young Adult

Objective:To investigate the effects of Rad50-targeted inhibition on the radiosensitivity of head and neck squamous cell carcinoma cells.Methods:Rad50 in Tca8113 and OSCC-15 cells was down-regulated by siRNA.Then the cells were treated by a small dose of radiation(2 Gy),Western blot was used to detect the expression of Rad50 protein.Comet assay was used to evaluate the DNA double strand breaks(DSBs).Colony survival assay was performed to detect the survival rate of the cells.Telomere FISH was performed to assess the telomere length in the cells.Results:Target siRNA inhibited Rad50 protein expression in Tca8113 and OSCC-15 cells. siRNA combined with the radiation of 2 Gy produced more DSBs,decreased the proliferation and shortened the nucleus telomere length of the cells more than radiation treatment alone.Conclusion:The targeted inhibition of Rad50 may increase the radiosensitivity of Tca8113 and OSCC-15 cells.

Zhigancao Decoction is from Shang Han Lun,which is widely used to treat cardiovascular diseases nowadays,such as arrhythmia,myocarditis,heart failure and so on.Moreover,according to records in Wai Tai Mi Yao:Zhigancao Decoction can also be used to treat lung"atrophy". This article introduced application of Zhigancao Decoction in treating respiratory diseases with good efficacy, which could provide new ideas for the TCM treatment of advanced respiratory diseases.

OBJECTIVE: To establish a new method of SNP typing. METHODS: Based on the principle of allele specific PCR and capillary electrophoresis technique, 11 diallelic SNP loci were selected and two forward primers with different length were designed for each SNP, with their 3' ends matched to the two alleles, respectively. An artificially mismatched base was also introduced into the third or fourth base in the 3' end area of the two forward primers in order to enhance the specificity of amplification. A common reverse primer was designed 100-300 bp away from the forward primers, and labeled with fluorescence. The PCR products were separated and analyzed by ABI Prism 310 Genetic Analyzer after all of the 11 SNPs were multiply amplified. RESULTS: A single product peak was observed while the SNP was homozygous, and two product peaks with different height were observed while the SNP was heterozygous. The length of PCR products was different with the different SNPs. According to the length of the products and the number of the product peaks, the genotypes of the 11 SNPs can simultaneously be analyzed, and the results were in accordance with the direct sequencing. CONCLUSION Fragment length discrepant allele specific fluorescence labeled multi-PCR (FLDASFLM-PCR) is a simple, rapid and efficient new method for SNP typing.
Alleles ; Electrophoresis, Capillary/methods* ; Forensic Genetics ; Humans ; Polymerase Chain Reaction/methods* ; Polymorphism, Single Nucleotide/genetics*

Objective To investigate the role of c-Jun NH2-terminal kinase (c-JNK) signaling pathway on voltage-gated potassium channel (Kv) remodeling in left ventricular myocytes of diabetic rats,and explore the intrinsic regulatory mechanism.Methods Forty-five SD rats were randomly divided into DM group (n=25,modeling with streptozotocin induction) and control group (n=20,fed with normal diet).Transient outward potassium current (Ito) of rats' ventricular myocytes in DM group and control group was recorded by whole-cell patch-clamp method.The c-Jun activity was detected using a non-radioactive JNK kinase assay kit (Cell Signaling Technology).JNK inhibitor SP600125 was used to incubate the cardiomyocytes of diabetes rats in vitro,and then the changes of I,o in cardiomyocytes were observed.Thioredoxin reductase (TrxR) inhibitor--auranofin (AF) was used to treat the rats' cardiomyocytes incubated with SP600125,and then the changes of Ito in cardiomyocytes were observed.The content of Kv4.2 was tested using anti-Kv4.2 antibody,and the results were analyzed using a UVP bioimaging system.Results The JNK activity in DM group rose more than 1 times compared with control group,while the density of Ito decreased significantly (Control:30.2 ± 3.3pA/pF,n=16;DM:15.3 ± 2.1pA/pF,n=17;P＜0.05).The ventricular myocytes of DM rats were treated with SP600125 (10μmol/Lol/L) for 4 hours,then the Ito density increased to control group level (DM+SP600125:32.3 ± 3.7pA/pF,n=18;Control:30.2 ± 3.3pA/pF,n=16;P＜0.05).There was no significant difference in the maximum Ito density between the treated with SP600125 (Control+SP600125:31.6 ± 3.4pA/pF,n=18) and untreated control groups.The Ito density in DM myocardial cells significantly increased after treatment with the membrane permeable protein inhibitor JNKI-1 (10μmol/L),and no changes were found in control group after the same treatment.The augmentation effect of SP600125 on Ito current in DM myocytes was significantly inhibited by TrxR inhibitor auranofin (lμmol/L) (DM+SP600125+AF:15.7 ± 3.3pA/pF,n=15),while AF did not change the Ito density in control group.The expression of Kv4.2 protein was significantly increased in DM rats after administration of SP600125,which was consistent with the changes of Ito current observed in the myocardium of DM rats,although not fully restored to the level of control group myocardium.JNK inhibitor did not markedly alter the expression of Kv4.2 protein in control group myocardium.Conclusions Kv channel remodeling in DM rat's myocardium is redox-regulated,and the Ito remodeling might be assisted with the persistent activation of c-JNK signaling pathway.It has showed that c-JNK activity is significantly increased in DM rat heart and the current density of Kv channels is reduced.The inhibition of JNK signaling pathway can markedly improve Kv channel reconstruction and the process may be regulated by thioredoxin system.

The objective of this study was to investigate the effect of ligustrazine on the expression of stem cell factor mRNA (SCF) in bone marrow tissue and explore the mechanism of hematopoietic reconstitution after bone marrow transplantation (BMT). The colony forming unit of spleen (CFU-S) were counted, the survival rate at days 7, 14 and 21 after BMT were measured, as well as the expression level of SCF mRNA was detected by RT-PCR. The results showed that in ligustrazine group CFU-S counts on day 10 and survival rate, expression level of SCF mRNA on day 7, 14 and 21 after BMT were higher than that in the control group (p < 0.01 or p < 0.05). In conclusion, ligustrazine promotes the recovery of hematopoietic cells in bone marrow, enhances the repair of bone marrow microvessels, and then improves bone marrow microenvironment and promotes hematopoietic reconstitution.
Animals ; Bone Marrow Transplantation ; Hematopoiesis ; drug effects ; Male ; Mice ; Mice, Inbred BALB C ; Pyrazines ; pharmacology ; RNA, Messenger ; genetics ; metabolism ; Stem Cell Factor ; genetics ; metabolism ; Transplantation, Isogeneic