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1.
Chinese Journal of Biotechnology ; (12): 2502-2516, 2023.
Article in Chinese | WPRIM | ID: wpr-981214

ABSTRACT

Bacillus subtilis is recognized as a generally-regarded-as-safe strain, and has been widely used in the biosynthesis of high value-added products, including N-acetylneuraminic acid (NeuAc) which is widely used as a nutraceutical and a pharmaceutical intermediate. Biosensors responding to target products are widely used in dynamic regulation and high-throughput screening in metabolic engineering to improve the efficiency of biosynthesis. However, B. subtilis lacks biosensors that can efficiently respond to NeuAc. This study first tested and optimized the transport capacity of NeuAc transporters, and obtained a series of strains with different transport capacities for testing NeuAc-responsive biosensors. Subsequently, the binding site sequence of Bbr_NanR responding to NeuAc was inserted into different sites of the constitutive promoter of B. subtilis, and active hybrid promoters were obtained. Next, by introducing and optimizing the expression of Bbr_NanR in B. subtilis with NeuAc transport capacity, we obtained an NeuAc-responsive biosensor with wide dynamic range and higher activation fold. Among them, P535-N2 can sensitively respond to changes in intracellular NeuAc concentration, with the largest dynamic range (180-20 245) AU/OD. P566-N2 shows a 122-fold of activation, which is 2 times of the reported NeuAc-responsive biosensor in B. subtilis. The NeuAc-responsive biosensor developed in this study can be used to screen enzyme mutants and B. subtilis strains with high NeuAc production efficiency, providing an efficient and sensitive analysis and regulation tool for biosynthesis of NeuAc in B. subtilis.


Subject(s)
N-Acetylneuraminic Acid/metabolism , Bacillus subtilis/metabolism , Promoter Regions, Genetic/genetics , Binding Sites , Biosensing Techniques
2.
Chinese Journal of Biotechnology ; (12): 2215-2230, 2023.
Article in Chinese | WPRIM | ID: wpr-981199

ABSTRACT

Functional membrane microdomains (FMMs) that are mainly composed of scaffold proteins and polyisoprenoids play important roles in diverse cellular physiological processes in bacteria. The aim of this study was to identify the correlation between MK-7 and FMMs and then regulate the MK-7 biosynthesis through FMMs. Firstly, the relationship between FMMs and MK-7 on the cell membrane was determined by fluorescent labeling. Secondly, we demonstrated that MK-7 is a key polyisoprenoid component of FMMs by analyzing the changes in the content of MK-7 on cell membrane and the changes in the membrane order before and after destroying the integrity of FMMs. Subsequently, the subcellular localization of some key enzymes in MK-7 synthesis was explored by visual analysis, and the intracellular free pathway enzymes Fni, IspA, HepT and YuxO were localized to FMMs through FloA to achieve the compartmentalization of MK-7 synthesis pathway. Finally, a high MK-7 production strain BS3AT was successfully obtained. The production of MK-7 reached 300.3 mg/L in shake flask and 464.2 mg/L in 3 L fermenter.


Subject(s)
Bacillus subtilis/metabolism , Vitamin K 2/metabolism , Bioreactors/microbiology , Membrane Microdomains/metabolism
3.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 257-266, 2023.
Article in Chinese | WPRIM | ID: wpr-984605

ABSTRACT

Postpartum lochia (PL) is an abnormal postpartum retrogression disease characterized by persistent bloody lochia lasting for more than 10 days. The pathogenesis of traditional Chinese and western medicine is complex,and the mechanism of drug action is not yet clear. The author summarized the pathogenesis and drug action mechanism of postpartum lochia from the perspectives of traditional Chinese and Western medicine by reviewing relevant domestic and foreign research in recent years. It was found that the basic pathogenesis of this disease is the imbalance of Chong Ren Qi and blood,multiple deficiency and multiple stasis. Commonly used drugs are divided into single traditional Chinese medicine and traditional Chinese medicine compound formulas and their preparations. By regulating the transcription and expression of related factors through multiple targets and pathways,it promotes uterine contraction,regulates collagen metabolism Regulating the expression of hormones and their receptors,promoting vascular regeneration,regulating cell apoptosis,proliferation and differentiation,downregulating inflammatory response,maintaining blood coagulation balance,and affecting energy metabolism in the body can promote postpartum recovery. Western medicine is often associated with mechanisms such as incomplete uterine involution,residual tissue,and intrauterine infections. The treatment mainly involves the combination of uterine contractions and antibiotics,with a single mode of action and mechanism. Therefore,traditional Chinese medicine has obvious and concrete advantages in treatment. This article aims to review the etiology and pathogenesis of postpartum lochia in traditional Chinese and western medicine,as well as drug treatment. It aims to construct the relationship between its pathogenesis and mechanism of action,providing reference for the clinical diagnosis and treatment of this disease and drug research and development.

4.
Journal of Chinese Physician ; (12): 1498-1503, 2022.
Article in Chinese | WPRIM | ID: wpr-956329

ABSTRACT

Objective:To present the clinical characteristics and treatment on patients with ectopic adrenocorticotropic hormone(ACTH) syndrome (EAS) caused by the retroperitoneal paraganglioma.Methods:The clinical data of a case of EAS caused by retroperitoneal paraganglioma were analyzed retrospectively, and the related literature at home and abroad was reviewed.Results:The 53-year-old female patient was admitted to endocrinology department due to a fifteen-year history of hypertension, accompanied by fatigue for three months, headache and dizziness for one month. The laboratory data demonstrated severe hypokalemia, high level of serum and urinary cortisol, while the ACTH level remained unsuppressed. The 24 h urinary vanillyl mandelic acid (VMA) and serum free methoxyepinephrine (MNs) level were elevated. The abdominal computed tomographic scan suggested a retroperitoneal mass next to the abdominal aorta. After the retroperitoneal tumor resection was performed, immunohistochemical staining of the tumor revealed Syn (+ ), CgA (+ ), ACTH (focal + ). By the retrospective analysis of 22 similar cases from 16 papers and the case summarized above, we found that most patients with EAS caused by the paraganglioma could demonstrate the typical clinical features of Cushing′s syndrome, while lack of the manifestation of paraganglioma. Therefore, preoperative preparations for paraganglioma were usually neglected.Conclusions:Ectopic ACTH syndrome (EAS) originating from paraganglioma is very rare. To improve the diagnosis rate, examination for catecholamine, MNs and 24 h urinary VMA before surgery in patients with EAS is suggested. Considering surgical resection as the optimal treatment, comprehensive preoperative preparations for both paraganglioma and Cushing′s syndrome are significant. A genetic test for pheochromocytoma/ paraganglioma and lifelong postoperative follow-up are also recommend.

5.
Journal of Pharmaceutical Practice ; (6): 391-394, 2021.
Article in Chinese | WPRIM | ID: wpr-886870

ABSTRACT

Due to the limited self-repair ability of neurons after injury, there has been a lack of effective treatments for nerve injury in clinical practice. So, to find drugs that promote the repair after nerve injury has become a research hotspot. Schwann cells and neurons play an important role in regeneration of the peripheral nerves after injury. This review summarizes the classification of peripheral nerve injury, the signaling pathways related to peripheral nerve regeneration in Schwann cells and neurons as well as diseases related to peripheral nerve injury, and provides a basis for further exploration of the regeneration mechanism after peripheral nerve injury.

6.
Chinese Journal of Postgraduates of Medicine ; (36): 504-508, 2020.
Article in Chinese | WPRIM | ID: wpr-865530

ABSTRACT

Objective:To explore the predictive value of N-terminal-pro-B-type brain natriaretic peptide (NT-pro BNP) and B-type brain natriaretic peptide (BNP) of symptomatic patent ductus arteriosus (sPDA) in premature infants.Methods:Sixty premature infants were recruited. The gestational age was 26-32 weeks and the birth weight was less than 1 500 g. According to the echocardiography measured on the 3rd day, the infants were divided into PDA group (40 cases) and control group (20 cases). PDA group was divided into sPDA group (20 cases) and asPDA group (20 cases). The sPDA group was divided into treatment group (10 cases) and non-treatment group (10 cases). The asPDA group was further divided into self-closed group (10 cases) and non- self-closed group (10 cases). NT-pro BNP and BNP were examined on the 3rd and 7th day.Results:The level of NT-pro BNP among sPDA group, asPDA group and control group had significant difference on the 3rd and 7th day ( P<0.05). On the 7th day, the level of NT-pro BNP between treatment group and non-treatment group had significant difference [4 082(111 - 7 566) ng/L vs. 9 643 (2 362 - 25 000) ng/L, P<0.05] between self-closed group and non- self-closed group [603 (27 - 1 698) ng/L vs. 4 595 (896 - 9 873) ng/L, P<0.05]. The level of NT-pro BNP on the 3rd day was positively correlated with of ductus arteriosus diameter, ratio of left atrium diameter and aortic root diameter, ratio of ductus arteriosus diameter and left pulmonary artery diameter ( r=0.358 - 0.455, P<0.05). The area under the curve drawn by NT-pro BNP on the 3rd day was 0.783. Conclusions:The level of NT-pro BNP on the 3rd day can be used as a predictor of sPDA.

7.
Journal of International Oncology ; (12): 475-479, 2019.
Article in Chinese | WPRIM | ID: wpr-789148

ABSTRACT

Objective To investigate the effects of calcium levofolinate and 5-fluorouracil combined with epirubicin on stress response and vascular endothelial growth factor (VEGF) level in patients with gastric cancer.Methods A total of 160 patients with gastric cancer treated in Huxi Hospital Affiliated to Jining Medical College from April 2016 to March 2018 were selected as research objects.All the patients were divided into two groups according to the random number table method and each group consisted of 80 cases.The control group was treated with epirubicin,while the study group was treated with calcium levofolinate and 5-fluorouracil combined with epirubicin.The clinical efficacy and adverse reactions of the two groups were observed and compared.The levels of VEGF and quality of life were compared before and after the treatment.The stress response indexes such as cortisol (Cor),norepinephrine (NE) and total antioxidant capacity (TAC) were detected,and the stress levels of the two groups were compared.Results The total effective rate of the study group was 67.5% (54/80),which was significantly better than that of the control group [45.0% (36/80)],and the difference was statistically significant (x2 =8.229,P =0.004).The quality of life of the two groups after the treatment was significantly higher than that before the treatment,and the quality of life scores of the study group were significantly higher than those of the control group (all P < 0.001).After the treatment,the levels of Cor,NE and TAC of the study group were (239.27 ± 19.63) μg/L,(258.46 ± 18.31) ng/L,(11.01 ± 0.77) KIU/L,which were significantly lower than those of the control group [(286.35 ± 20.63) μg/L,(294.18± 21.95) ng/L,(12.73 ± 1.58) KIU/L],and the differences were statistically significant (t =10.003,P < 0.001;t =9.476,P < 0.001;t =6.984,P < 0.001).After the treatment,the VEGF levels of the two groups were lower than those before the treatment,and the VEGF level of the study group was significantly lower than that of the control group [(39.4 ±0.9) pg/ml vs.(42.3 ± 1.1) pg/ml,t =18.251,P < 0.001].The total incidences of adverse reactions in the control group and the study group were 82.5% (66/80) and 48.8% (39/80),respectively.The incidence of adverse reactions in the control group was significantly higher than that in the study group,and the difference was statistically significant (x2 =20.197,P < 0.001).Conclusion Calcium levofolinate and 5-fluorouracil combined with epirubicin has a good clinical effect in treating patients with gastric cancer.It can not only improve the level of VEGF in the serum of patients,but also can improve the quality of life of patients,reduce the incidence of adverse reactions and body stress response.It has broad application prospects and is worthy of further promotion and application in clinic.

8.
Chinese Journal of Biotechnology ; (12): 1787-1796, 2019.
Article in Chinese | WPRIM | ID: wpr-771753

ABSTRACT

Chitinase has a wide industrial application prospect. For example, it can degrade shrimp shells, crab shells and other crustacean waste into high value-added chitooligosaccharides. However, the low catalytic efficiency of chitinase greatly limits the production of chitooligosaccharides. In previous study, the we expressed a chitinase Chisb with high catalytic efficiency and studied its enzymatic properties. In order to further improve the catalytic efficiency of Chisb, with R13NprB-C-SP-H as the parent, here error-prone PCR was used to construct random mutant library to conduct directed evolution of chitinase Chisb. Two mutants C43D and E336R were obtained with 96-well plate primary screening and shaker-screening, and their enzymatic properties were also studied. The optimum temperature of C43D and E336R was 55 °C, and the optimum pH of C43D was 5.0, while that of E336R was 9.0. The catalytic efficiency of C43D and E336R was 1.35 times and 1.57 times higher than that of control. The chitooligosaccharide concentration of E336R and C43D was 2.53 g/L and 2.06 g/L, improved by 2.84 times and 2.31 times compared with the control (0.89 g/L), respectively. In addition, the substrate conversion rate of mutants E336R and C43D was 84.3% and 68.7%, improved by 54.6% and 39% compared with the control (29.7%), respectively. In summary, the study indicates that random mutation introduced by error-prone PCR can effectively improve the catalytic efficiency of chitinase Chisb. The positive mutants with higher catalytic efficiency obtained in the above study and their enzymatic property analysis have important research significance and application value for the biosynthesis of chitooligosaccharides.


Subject(s)
Biocatalysis , Chitin , Chitinases , Hydrogen-Ion Concentration , Polymerase Chain Reaction
9.
Chinese Journal of Biotechnology ; (12): 2003-2013, 2019.
Article in Chinese | WPRIM | ID: wpr-771737

ABSTRACT

Industrial fermentation focuses on realizing the uniform of high titer, high yield, and high productivity. Multi-scale analysis and regulation, including molecule level, cell level, and bioreactor level, facilitate global optimization and dynamic balance of fermentation process, which determine high efficiency of biosynthesis, targeted directionality of bioconversion, process robustness, and well-organized system. In this review, we summariz and discuss advances in multi-scale analysis and regulation for fermentation process focusing on the following four aspects: 1) kinetic modeling of metabolic pathways, 2) characteristic of cell metabolism, 3) co-coupling fermentation and purification, and 4) bioreactor design. Integrating multi-scale analysis of fermentation process and integrating multi-scale regulation are expected as an important strategy for realizing highly efficient fermentation by industrial microorganisms.


Subject(s)
Bioreactors , Fermentation , Industrial Microbiology , Kinetics , Metabolic Networks and Pathways
10.
Chongqing Medicine ; (36): 1480-1484, 2018.
Article in Chinese | WPRIM | ID: wpr-691976

ABSTRACT

Objective To investigate the status quo of the cerebral injury in patients with acute stress disorder (ASD) and the impact of family function,mental toughness,and the characteristics of brain lesions on it.Methods A total of 349 patients were enrolled from North China University of Science and Technology affiliated hospital neurology department and neurosurgery department from May 2016 to November 2016 and they were tested with Stanford Acute Stress Reaction Questionnaire (SASRQ),the family function assessment scale (APGAR),Chinese version of mental toughness scale (CD-RISC).Results 349 cases of patients with SASRQ score (57.21±44.97),8 to 39 160 people (45.8%),40 to 56 85 people (24.4%),57 to 150 104 people (29.8%).The results showed that whether the hemiplegia (β=-0.030),family function (β=-0.032),mental toughness (β=0.886),disturbing degree (β=0.052),bad days (β=0.060)were picked in the regression equation (P<0.05).Conclusion There were obvious acute stress symptoms in patients with brain injury.The individuals who have family dysfunction,the worse the psychological resilience and the higher the disturbance degree of the patients with hemiplegia,may be likely to get acute stress disorder.

11.
Chinese Journal of Organ Transplantation ; (12): 531-535, 2017.
Article in Chinese | WPRIM | ID: wpr-667483

ABSTRACT

Objective To identify the effect of renal impairment on the pharmacokinetics of mycophenolate mofetil in Chinese adult renal recipients during the early post-transplant period.Methods Thirty Chinese renal allograft recipients treated with mycophenolate mofetil in combination with tacrolimus and corticosteroids were divided into three groups based on their renal functions.Group Ⅰ had preserved renal function (eGFR≥90 mL/min/1.73 m2,n =9);Group Ⅱ had moderate renal insufficiency (30≤eGFR<90 mL/min/1.73 m2,n =12) and Group Ⅲ had severe renal impairment (eGFR <30 mL/min/1.73 m2,n =9).mycophenolic acid (MPA) exposure and MPA glucuronide (MPAG) exposure were determined by high performance liquid chromatography (HPLC)at first month after transplantation.MPA-AUC0-12h and MPAG-AUC0-12h were calculated by the linear trapezoidal rule.Results Mean MPA-AUC0-12h values were similar between group Ⅰ and group Ⅱ(37.8 ± 15.6 vs.54.5 ± 27.0μg·h·ml-1,P>0.05).MPA-AUC0-12h values were significantly higher in group Ⅲ than in group Ⅰ (75.7-±29.5 vs.37.8-± 15.6μg·h·ml-1,P<0.05).The severe renal insufficiency group showed a significantly increased AUC0-12h for MPAG (1899.1 ± 987.1 μg·h· ml-1vs.859.9 ± 261.4 vs.692.6 ± 384.8,P<0.05).There was no significant difference in MPAGAUC0-12h between group Ⅱ and Group Ⅰ (P =0.532).Conclusion In adult renal recipients during the early post-transplant period,total MPA exposure was significantly increased because of severe renal insufficiency with oliguria or anuria.Adjusting MMF dose according to renal function may help to prevent side effects and improve efficacy.

12.
Journal of International Oncology ; (12): 819-823, 2017.
Article in Chinese | WPRIM | ID: wpr-666244

ABSTRACT

Objective To study the effect of microRNA-320 (miR-320) targeting E2F1 gene on tumor glycometabolism in colorectal cancer.Methods The miR-320 expression level in colorectal cancer cell lines and cancer tissues was detected using quantitative real-time polymerase chain reaction (qRT-PCR).The binding sites of miR-320 and E2F1 were predicted by bioinformatics.Luciferase assay was used to detect the targeting regulation of miR-320 on E2F1.The relationship between E2F1 and miR-320 was verified in mRNA level and protein level.When the miR-320 in SW480 and LOVO ceils was up-regulated and the E2F1 was down-regulated,the changes of glycometabolism in tumor cells were analyzed using glucose/glucose oxidase kit and lactate test kit.Results The qRT-PCR results showed low expressions of miR-320 in colorectal cancer cell lines and cancer tissues (F =42.327,P < 0.001;t =4.345,P =0.023).Luciferase assay showed that miR-320 could negatively regulate the expression of E2F1 (t =4.716,P =0.042).The expression levels of E2F1 protein and mRNA (t =4.780,P =0.041;t =5.506,P =0.031) confirmed that miR-320 could interact with E2F1 in LOVO and SW480 cells.Overexpression of miR-320 could reduce the contents of glucose (t =5.262,P=0.034;t =21.079,P=0.002) and lactic acid (t =9.609,P=0.011;t =18.582,P=0.003) in the cellular supematant in SW480 and LOVO ceils.Down-regulating the expression of E2F1 at the same time could enhance the inhibitory effect of miR-320 on glucose (t =5.128,P =0.036;t =5.089,P =0.037) and lactic acid (t =8.573,P =0.013;t =13.364,P =0.006).Conclusion E2F1 is the target gene of miR-320,and miR-320 can regulate the glycometabolism of colorectal cancer cells by targeting E2F1 gene.

13.
Chinese Journal of Rehabilitation Theory and Practice ; (12): 603-606, 2017.
Article in Chinese | WPRIM | ID: wpr-608077

ABSTRACT

Objective To explore the effect of living mode on quality of life and life satisfaction of patients with spinal cord injury who survived Tangshan earthquake. Methods From February to May, 2016, 76 patients with spinal cord injury survived the earthquake were in-vestigated, among whom 38 patients lived in the nursing home or rehabilitation village and the other 38 patients discretely lived at home. Their quality of life and life satisfaction were assessed with WHO Quality of Life-BREF (WHOQOL-BREF) and Life Satisfaction Assess-ment respectively. Results The scores of physical, psychological, social adaptation and environment field in WHOQOL-BREF were signifi-cantly higher in the concentrated living group than in the scattered living group (t>8.97, P<0.001), as well as the life satisfaction (t=6.55, P<0.001). Conclusion The concentrated living mode could improve the quality of life and life satisfaction of the patients with spinal cord inju-ry survived Tangshan earthquake.

14.
Chongqing Medicine ; (36): 2353-2355,2358, 2017.
Article in Chinese | WPRIM | ID: wpr-620313

ABSTRACT

Objective To explore the correlation between the reliability and validity of Brunel balance assessment(BBA)with the activities of daily living(ADL).Methods The BBA,ADL and walking ability test were performed on 215 patients conforming to the inclusion standard by two professionals.The Pearson correlation analysis,factor analysis and descriptive statistical analysis were adopted.Results The BBA total score and Cronbach's α coefficient in 3 dimensions was 0.852~0.941(P<0.01),moreover the relative coefficient of each item with its dimension was higher that that of other dimensions;3 common factors were extracted by the factor analysis,the contribution rate was 83.916%;but BBA had the ceiling effect,the relative coefficient of BBA with ADL and walking ability was 0.284-0.709(P<0.05).Conclusion BBA has a good reliability and validity and can better reflect the functions of ADL and walk.

15.
Chinese Journal of Pathophysiology ; (12): 1283-1287, 2017.
Article in Chinese | WPRIM | ID: wpr-616484

ABSTRACT

AIM: To explore the influence of clonidine on inflammatory response in lung injury mice and its possible mechanism.METHODS: Clonidine solution was intravenously injected into the mice with lung injury induced by LPS.The left upper lobe of the lung was collected to detect lung wet/dry weight ratio (W/D) and total lung water content (TLW).The concentrations of IL-6, IL-1β and TNF-α were measured by ELISA.The expression of α7 nicotinic acetylcholine receptor (α7nAChR) and high-mobility group box protein 1 (HMGB1) at mRNA and protein levels was determined by RT-PCR and Western blot.After importing α7nAChR siRNA lentiviral vector or injecting exogenous HMGB1 protein, the inflammatory cytokines were detected.RESULTS: Clonidine attenuated lung injury and inhibited inflammatory reaction.Clonidine promoted the activation of cholinergic anti-inflammatory pathway by promoting α7nAChR expression.Clonidine inhibited HMGB1 expression, which promoted the secretion of IL-6, IL-1β and TNF-α.HMGB1 was negatively regulated by α7nAChR.CONCLUSION: Clonidine functions as an anti-inflammatory reagent to the lung injury mice.The mechanism may be related to activating the cholinergic anti-inflammatory pathway and inhibiting the expression of HMGB1.

16.
Chongqing Medicine ; (36): 4977-4979, 2017.
Article in Chinese | WPRIM | ID: wpr-691722

ABSTRACT

Objective To investigate the correlation between TYMS gene mRNA expression level and EGFR mutation in stage Ⅲ A-N2 non-small-cell lung cancer tissue (NSCLC).Methods The branched DNA-liquidchip technology (bDNA-LCT) and mutant-enriched liquidchip (MEL) technology were used to detect the TYMS mRNA expression and EGFR mutations at exon 19 and 21 in NSCLC tissues from 30 patients with stages Ⅲ A-N2 NSCLC,and the results were analyzed.Results Among 30 cases,low TYMS mRNA expression was in 14 cases (46.7 %),middle to low TYMS mRNA expression in 7 cases (23.3 %),middle mRNA expression in 7 cases (23.3 %),middle to high TYMS mRNA expression in 0 case and high TYMS mRNA expression in 2 cases (6.7%);12 cases of EGFR mutation were detected out with the mutation rate of 40.0%,including 6 cases of exon 19 deletion and 6 cases of exon 21 missense mutation.The TYMS mRNA expression level was correlated with the EGFR mutation.The EGFR mutation commonly occurred in the tumor tissue of the patients with TYMS mRNA low expression (Z=-2.604,P=0.009).Conclusion The TYMS mRNA expression in NSCLC tissue is correlated with the EGFR gene mutation,which can provide references for the drug selection aiming at the patients with different conditions.

17.
Chinese Journal of Clinical Oncology ; (24): 531-535, 2016.
Article in Chinese | WPRIM | ID: wpr-492867

ABSTRACT

Objective:Mutations in epidermal growth factor receptor (EGFR) can predict tumor response to tyrosine kinase inhibitors (TKIs) in non-small cell lung cancer (NSCLC). However, not all cases of NSCLC with EGFR mutations can respond well;thus, discovering the heterogeneity of NSCLC at the molecular level is necessary. This study aimed to determine the discrepancy in EGFR mutations in primary tumors, N2 lymph nodes, and plasma samples. Methods:Primary tumors, N2 lymph nodes, and plasma samples obtained from 49 patients with stageⅢA-N2 NSCLC were analyzed for EGFR mutations in exons 19 and 21 by using mutant-enriched liquidchip technology. Results:In 49 patients, we detected 18 (36.7%) EGFR mutations in primary tumors, 11 (22.4%) mutations in N2 lymph nodes, and 2 (4.1%) mutations in plasma samples. Eleven (22.4%) cases showed discordance in EGFR mutations between primary tu-mors and N2 lymph nodes. In nine cases, EGFR mutations were detected only in primary tumors, whereas EGFR mutations were de-tected only in N2 lymph nodes in two cases. In addition, EGFR mutations were detected in the plasma samples of two patients, who al-so carry mutations in their primary tumors. Conclusion:A considerable proportion of NSCLC cases showed discrepancy in EGFR muta-tions between primary tumors and N2 lymph nodes. In addition, the detection rate of EGFR mutations was lower in plasma samples obtained from patients with stage IIIA-N2 NSCLC. All of the results indicated tumor heterogeneity at the molecular level during metas-tasis, and this heterogeneity may have implications during treatment with TKIs.

18.
Tianjin Medical Journal ; (12): 1496-1499, 2016.
Article in Chinese | WPRIM | ID: wpr-506489

ABSTRACT

Objective To investigate the expressions of carbohydrate antigen 19-9(CA19-9), carbohydrate antigen 15-3(CA15-3) and carbohydrate antigen 125(CA125) and their clinical significance in papillary thyroid carcinoma (PTC). Methods The expressions of CA19-9, CA15-3 and CA125 were detected by immunohistochemical MaxVision method in 80 cases of PTC and 80 cases of benign thyroid lesions (BTL), including 34 cases of nodular goiter, 26 cases of Hashimoto's thyroiditis and 20 cases of follicular adenoma. The relationship between expressions of CA19-9, CA15-3 and CA125 and the clinical pathological characteristics were analyzed. Results The expression rates of CA19-9, CA15-3 and CA125 in 80 cases of PTC were 85%, 100%and 43.8%respectively, compared with BTL, the difference was statistically significant (P 0.05). The sensitivity of CA19-9, CA15-3 and CA125 in the differential diagnosis of PTC and BTL were 85%, 100% and 43.8% respectively, and the specificity were 91.3%, 36.3%and 91.3%, respectively. Conclusion The expressions of CA19-9, CA153 and CA125 are helpful for the differential diagnosis of PTC and BTL.

19.
The Journal of Clinical Anesthesiology ; (12): 598-601, 2016.
Article in Chinese | WPRIM | ID: wpr-494521

ABSTRACT

Objective To investigate the effect of resveratrol (RES)on sevoflurane-induced nerve cell injury and its mechanism.Methods Fetal hippocampal tissues were taken from SD pregnant rats and primary nerve cells were isolated and cultured,then the cells were randomly divided into four groups:group control (group C),normal primary nerve cells;group 3% sevoflurane (group S),cells treated with 3% sevoflurane gas;group 3% sevoflurane+RES (group SR),cells treated with RES for 6 h,and then treated with 3% sevoflurane gas;group RES (group R),cells treated with RES.Flow cytometry assay was used to detect the apoptosis of nerve cell;CCK-8 Kit was used to detect cell proliferation;Western blot was used to detect the expression level of Caspase-3,Bax,Bcl-2 and Bace-1;ELISA method was used to detect the protein level of amyloid precursor protein (APP)andβ-amyloid peptide (Aβ).Results Compared with the group C,cell apoptosis was increased (P <0.05),cell proliferation was decreased (P <0.05),the expression levels of Caspase-3 and Bax were up-regulated (P <0.05),the expression level of Bcl-2 was down-regulated (P <0.05), and the protein levels of Bace-1,APP and Aβwere significantly decreased by 3% sevoflurane treat-ment (P <0.05),which were all significantly reversed by RES treatment.Compared with group S, cell apoptosis was decreased (P <0.05),cell proliferation was increased (P <0.05),the expression levels of Caspase-3 and Bax were down-regulated (P <0.05),the expression level of Bcl-2 was up-regulated (P <0.05),and the protein levels of Bace-1,APP and Aβwere increased in group SR (P <0.05).Conclusion Resveratrol alleviated sevoflurane-induced nerve cell injury in vitro by reducing cell apoptosis and promoting cell proliferation,which may be related with the reduction of Aβexpression and the reduced Aβ-induced neurotoxicity.

20.
Journal of Practical Stomatology ; (6): 286-289, 2015.
Article in Chinese | WPRIM | ID: wpr-465181

ABSTRACT

Dentin blocks were prepared from 36 freshly extracted teeth and randomly divided into 3 groups(n=1 2).The block surfaces were cleaned and then treated with 3 MP90 bonding system,Gluma desensitizer and distilled water respectively.Scanning electron microsco-py observation showed that the dentin tubule sealing rate of 3 MP90 bonding system,Gluma desensitizer and distilled water was 1 00%, 76.48% and 0(P<0.05)respectively.

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