Objective The purpose of this study was to investigate the protective effect of dexmedetomidine(DEX)on pathological car-diomyocyte hypertrophy.Methods An in vitro cell population was established in neonatal rats.The rats were divided into six groups:control group(C)without serum for 24 h,model group(A)with angiotensin Ⅱ(Ang Ⅱ)for 24 h,dexmedetomidine group(AD)with Ang Ⅱ+DEX(5μmol/L)for 24 h,C'group with serum-free culture for 48 h,A'group with Ang Ⅱfor 24 h,and AD'group with DEX+Ang Ⅱfor 24 h.The morphological changes of cells were observed by immunofluorescence.The protein expressions of atrial natriuretic peptide(ANP),brain natriuretic peptide(BNP),and myosin heavy chain(β-MHC)were detected by western blot,and the cell activity was detected by CCK-8.Results Compared with group C,the size of cells in group A was larger,and that in group AD was even more significant.Simi-lar observations were found for hypertrophy related proteins.Compared with group C,the expression of ANP,BNP,and βMHC increased in group A,although the increase in AD group was more obvious.CCK-8 detection showed that compared with group C,the activity of group A decreased and that of group AD increased significantly.Compared with the C'group,the expression of hypertrophy-related pro-tein in the A'group was significantly increased,but the expression of ANP and BNP protein in the AD'group was significantly lower than that in the A'group.The differences were statistically significant(P<0.05).Conclusion Dexmedetomidine can alleviate the occur-rence of pathological hypertrophy through compensatory mechanisms similar to physiological myocardial hypertrophy,and may play a role in myocardial protection.

Finding stable expression sites on the chromosomes of Chinese hamster ovary (CHO) cells is an effective method to solve the problem of unstable expression of CHO cells in long-term culture. Our group used lentiviral transfection to integrate the tracer gene (Zsgreen1) into the chromosome of CHO cells and found multiple potential stable expression sites. This study verified the ability of one of the sites located in the 148052-148157 bp region on chromosome NW_003614241.1 to stably express exogenous proteins.The expression of Zsgreen1 gene was first observed, and CRISPR/Cas9 technology was then used to integrate the enhanced green fluorescent protein (EGFP) gene into this site. Three strains of EGFP gene integrated cells were obtained. After 60 generations of suspension culture, the fluorescence intensity of the cells had no significant changes, which proved that this site can stably express the EGFP gene. The same method was used to construct recombinant CHO cell lines expressing the human serum albumin (HSA) gene, and was verified by Western blot that this site could express and secrete HSA. It shows that the above-mentioned sites can be integrated and can stably express exogenous proteins.

Objective:To explore the feasibility and safety of minimally invasive surfactant administration (MISA) in preterm neonates with respiratory distress syndrome (NRDS).Methods:In this multicenter prospective randomized controlled trial, 92 preterm infants with gestation age ≤30 weeks and diagnosed with NRDS were enrolled in 8 level Ⅲ neonatal intensive care units (NICU) in Beijing-Tianjin-Hebei Region from 1 st July 2017 to 31 st December 2018. They were randomly assigned to minimally invasive surfactant administration (MISA) group or endotracheal intubation surfactant administration (EISA) group according to random number generated by computer. Infants in both groups received calf pulmonary surfactant preparation at a dose of 70-100 mg/kg. The data of demography, perinatal situation, medication administration, complications, clinical outcomes in the two groups were compared with Chi-square test, Student′s t-test, Mann-Whitney U test or Fisher′s exact test. Results:Among the 92 preterm infants, 53 were males, 39 were females; 47 were in the MISA group (25 males), and 45 were in the EISA group (28 males). The gestational age and birth weight were (29.5±1.2) weeks and (1 271±242) g in all patients, (29.5±1.4) weeks and (1 285±256) g in the MISA group, and (29.6±0.9) weeks and (1 255±227) g in the EISA group. The duration of surfactant infusion and the length of whole procedure in the MISA group were significantly longer than that in the EISA group (60 (18, 270) s vs. 50 (30, 60) s, Z=3.009, P=0.003; 90 (60, 300) s vs. 60 (44, 270) s, Z=3.365, P=0.001). For the outcomes, the incidence of hemodynamically significant patent ductus arteriosus (hsPDA) and bronchopulmonary dysplasia (BPD) were lower in the MISA group than in the EISA group (36% (17/47) vs. 67% (30/45), χ 2=8.556, P=0.003; 26% (12/47) vs. 47% (21/45), χ 2=4.464, P=0.035). Conclusions:Minimally invasive surfactant administration is applicable in preterm infants ≤30 weeks gestational age with NRDS. Although the length of whole procedure is longer than route endotracheal administration, the benefit of decreasing the incidences of hsPDA and BPD outweighs this demerit.

Objective To explore the clinical effect of traditional Chinese medicine on lipid metabolism dis-orders in hemodialysis patients.Methods 70 patients with hemodialysis received in the hospital from Novem-ber 2015 to April 2017 were enrolled in the study.They were randomly divided into control group and treat-ment group with 35 cases in each group.The control group was treated with simvastatin and and the treatment group was treated with self-made fat recipe combined with simvastatin.The levels of serum lipid ,serum in-flammatory cytokines ,renal function and liver function ,the total effective rate of treatment and the incidence of adverse reactions were compared between the two groups before and after treatment.Results There were no statistical significances in serum lipid indexes such as triglyceride (TG) ,total cholesterol (TC) ,high densi-ty lipoprotein cholesterol (HDL-C) ,low density lipoprotein cholesterol (LDL-C) ,C reactive protein (CRP) , interleukin 6 (IL-6) ,tumor necrosis factor α(TNF-α) and other serum inflammatory factors ,and renal func-tion indexes ,including urea nitrogen (BUN) ,creatinine (Scr) ,liver function indexes ,including alanine amin-otransferase (ALT) ,aspartate aminotransferase (AST) between two groups before treatment (P＞0.05) ;af-ter treatment ,the TG ,TC ,LDL-C ,CRP ,IL-6 ,TNF-α ,BUN ,Scr ,ALT and AST levels of the patients in the treatment group were significantly lower than those in the control group ;the HDL-C level of the patients in the treatment group was significantly higher than that in the control group ;the total effective rate of the treat-ment group was significantly higher than that in the control group ;the incidence of adverse reactions was sig-nificantly lower than that of the control group ,and the differences were statistically significant (P＞0.05). Conclusion The lipid-lowering effect of treatment of hemodialysis patients with traditional Chinese medicine lipid-lowering treatment is remarkable ,and worthy of promotion.

For more economical and efficient DNA clonging, pFL-XS-T, a Biobrick-T vector was constructed based on pMD18-T vector, carrying clonging regions of XbaⅠ-XcmⅠ-XcmⅠ-SpeⅠ. The results revealed that PCR products could be conveniently inserted into pFL-XS-T vevtor digested by XcmⅠby means of TA cloning. The positive frequency of recombination can meet the experimental requirements and all the plasmids obtained meet Biobrick standard. Moreover, the pFL-XS-T is compatible with other Biobrick parts, and serves as a vector for functional DNA fragments screening.
Cloning, Molecular ; DNA ; Genetic Vectors ; Plasmids ; Polymerase Chain Reaction ; Synthetic Biology

Resveratrol is a natural polyphenolic substance with a variety of bioactivities,such as anti-oxidation,anti-tumor and apoptosis induction.This paper summarized the recent research progress of resveratrol induced cancerous cell apoptosis,including human cervical cancer HeLa cells,leukemia cells,hepatoma cells and gastric cancer cells,and analyzed the molecular mechanism behind resveratrol-induced cell apoptosis in tumor.In addition,resveratrol was investigated by blocking the cell cycle,regulating the expressions of related genes and proteins and mitochondria-induced apoptosis pathways as a potential application of cancer drugs to clinical researches.

Objective By discussing the state of lifestyle as well as affecting factors of kidney transplant recipients,to provide more health education content and basis for their physical and psychological health.Method With internationally accepted Health-Promoting Lifestyle Profile (HPLP),we surveyed the lifestyle of the selected 104 long-term follow-up cases of kidney transplant recipients.At the same time,163 sex-and age-matched healthy volunteers,who had no obvious abnormalities in the medical test,were chosen.Result For HPLP scores among the 104 cases of recipients,20 cases were excellent,67 cases good,17 cases common,and none was inferior.As a whole,its excellent rate was 83.65％.As for 129 healthy volunteers,their overall excellent rate was 70.55％.The HPLP scores for the nutrition behavior ranked top in kidney transplant recipients,followed by healthy responsibility behavior,and lowest for exercise behavior.For the healthy volunteers,the HPLP scores for interpersonal support behavior ranked top,followed by nutrition behavior,and lowest for healthy responsibility.Correlation analysis revealed that the HPLP scores in kidney transplant recipients were significantly and positively correlated with age (r =0.307,P =0.002) and educational level (r=0.370,P =0.000),and not with gender,ethnicity,occupation and kidney sources (P＞0.05).The HPLP scores in idney transplant recipients were higher than those in healthy volunteers,among which self-actualization and healthy responsibility showed statistically significant differences (P ＜ 0.05),there was no significant difference in exercise,nutrition,interpersonal support and stress management between recipients and healthy volunteers (P＞0.05).Conclusion The HPLP scores in kidney transplants was higher than in healthy volunteers,thereinto,stress management behavior and exercise behavior were relatively weak,which were the focused improvement projects of lifestyle of kidney transplant recipients.

Embolization, Therapeutic ; Humans ; Hypertension, Portal ; therapy ; Portasystemic Shunt, Surgical

BACKGROUNDThe high blood homocysteine (Hcy) levels found in patients with hyperhomocysteinemia (HHcy) have been implicated in an increased risk of cardiovascular disease morbidity and mortality in end-stage renal disease (ESRD). This study investigated the association of HHcy with progression of IgA nephropathy.

METHODSWe analyzed 108 participants newly diagnosed with IgA nephropathy between August 2005 and August 2007 in the Department of Nephrology, Chinese People's Liberation Army General Hospital. The association between clinicopathological factors and the Hcy levels were analyzed by Logistic regression and those with ESRD risk were analyzed by Cox regression.

RESULTSPatients were aged (35.71 ± 10.73) years and included 45.71% women and 12.04% patients with HHcy. In multivariate Logistic regression analysis, HHcy was associated with arterial lesions (OR 2.60; 95% CI 1.55 ± 4.34; P < 0.001) even when age, body mass index, estimated glomerular filtration rate, mean arterial pressure, and initial proteinuria were taken into account. Mean follow-up was (67.37 ± 16.21) months. HHcy was also associated with worse ESRD-free survival (HR 4.71; 95% CI 1.45 to 15.31; P = 0.010).

CONCLUSIONHHcy is associated with the risk of intrarenal arterial lesions and may be useful for estimating the prognosis of IgA nephropathy.

Adult ; Body Mass Index ; Female ; Glomerular Filtration Rate ; physiology ; Glomerulonephritis, IGA ; etiology ; physiopathology ; Humans ; Hyperhomocysteinemia ; complications ; physiopathology ; Logistic Models ; Male ; Middle Aged ; Retrospective Studies

OBJECTIVETo construct digitized three-dimensional models of the sacrum of women of Uygur and Han nationalities in Xinjiang and assess their value in anatomical studies.

METHODSNinety Uygur women and 90 Han women of child-bearing age in Xinjiang were recruited. Digitized three-dimensional reconstruction was used to construct the sacrum models for morphological study and measurement of the physiological indices.

RESULTSThe sacral forms of Han women were consistent with the standard anatomical descriptions. Of the Uygur women, 57 (63.3%) showed a standard type of the sacrum, 6 (6.7%) had 4 pairs of sacral foramens, 9 (10%) had 5 pairs of sacral foramens, and 18 (20%) had sacrococcygeal joint abnormalities. There were significant differences in sacral morphologies between the two nationalities (P<0.05). The depths of the sacrum foramen and sacral hiatus were significantly greater in Uyghur women than in Han women (P<0.05). Only a minor proportion of the cases had nonstandard sacral types, found only in Uygur women.

CONCLUSIONSUygur and Han women of child-bearing age in Xinjiang have morphological and anatomical differences of the sacrum, which should be considered in clinical practice.

Adult ; Asian Continental Ancestry Group ; Ethnic Groups ; Female ; Humans ; Imaging, Three-Dimensional ; Models, Anatomic ; Sacrum ; anatomy & histology ; Signal Processing, Computer-Assisted