Experiences in middle lobe hepatectomy / 中华普通外科杂志

Objective To explore the technical knowhow and experience of mesohepatectomy for central region liver disease.Methods The clinical data of 86 patients with liver disease in central region undergoing mesohepatectomy were retrospectively analysed in Henan Provincial People's Hospital,including 49 males and 37 females.There were 47 cases of central liver cancer,15 cases of hilar cholangiocarcinoma,4 cases of hepatic hemangioma,13 cases of gallbladder cancer,and 7 cases of intrahepatic cholangiolithiasis in central liver.25 cases received accurate hepatectomy (group A) and 61 cases did irregular hepatectomy (group B).Results In group A,15 cases did Ⅳ,Ⅴ and Ⅷ lobectomy,10 cases underwent Ⅳ and Ⅴpartial lobectomy.Among the irregular hepatectomy group (group B),35 were treated with hepatic middle lobe resection,26 with local middle liver resection.There were significant differences in operation time,degree of postoperative liver function damage between the two groups (P ＜ 0.05),while there was no difference in postoperative complications (P ＜ 0.05).Conclusions The accurate mesohepatectomy can reduce the incidence of postoperative liver function damage and surgical complications.

Meta Analysis of Relationship between Helicobacter pylori Infection and Autoimmune Thyroid Diseases / 中国医科大学学报

Objective To investigate the association between Helicobacter pylori(H. pylori) infection and Autoimmune thyroid diseases (ATDs). Methods The literatures on the association of H. pylori with ATDs were retrieved by searching databases from the inception of each da?tabase to October 2015. Data extraction and quality assessment were completed by two authors. Meta analysis was performed using RevMan 5.3 software,calculating the odds ratio and 95%confidence interval. Results Twelve papers were included for the meta?analysis. The total sample size was 1 615,with 918 cases and 697 controls,respectively. Compared with the controls,H.pyloriinfection significantly increased the risk of auto?immune thyroid diseases development with a pooled of[OR=1.86,95%CI(1.18,2.94)]. H.Pylori?CagA infection significantly increased the risk of autoimmune thyroid diseases development with a pooled of[OR=2.66,95%CI(1.61,4.41)]. H. pylori infection is associated with Graves dis?ease[OR=3.37,95%CI(1.90?5.97)]and Hashimoto′s thyroiditis[OR=1.83,95%CI(1.22,2.76)]. The results of publication bias and sensitivi?ty analysis confirmed the reliability and stability of this meta analysis. Conclusion H. pylori infection may be associated with an increased risk of developing the autoimmune thyroid diseases.

Anticoagulant chitosan nanoparticles：synthesis, characterization and biological safety / 中国组织工程研究

BACKGROUND:Studies have shown that chitosan and other natural polysaccharides have heparin-like anticoagulant function after sulfonated modification. Sulfonated chitosan has good anticoagulant property because the sulfonate group formed by sulfonated chitosan is similar with the active group of heparin. OBJECTIVE: To prepare the anticoagulant chitosan nanoparticles and to detect its morphology, physical and chemical properties and biological security. METHODS: Chitosan nanoparticles were synthesized by emulsion-chemical cross link. Sulfonated chitosan nanoparticles were synthesized by sulfonation reaction. Its morphology was described by transmission electron microscope. The peak-value change of its specific groups was observed by infrared spectroscopy. (1) Coagulation experiment: Heparin, chitosan nanoparticles and 10, 30 and 50 mg of sulfonated chitosan nanoparticles were added into the blood of Spraque-Dawley rats. The coagulation indicators were detected. (2) Hemolysis experiment: deionized water, physiological saline and 10, 30, 50 g/L sulfonated chitosan nanoparticles extracts were added into 2% red blood cel suspension of rabbits. The hemolysis rate was detected. (3) Cytotoxicity experiments: DMEM medium containing fetal bovine serum and 10, 30, 50 g/L sulfonated chitosan nanoparticle extracts were used to culture human umbilical vein endothelial cels. Cel relative growth rate and toxicity grading were detected after 72 hours. RESULTS AND CONCLUSION: Scanning electron microscopy showed that sulfonated chitosan nanoparticles had good morphology, with a diameter of 50 nm. Infrared spectroscopy showed that the sulfonated replacement occurred.In vitro coagulation experiments showed that sulfonated chitosan nanoparticles had significant anticoagulant effects in a dose-dependent manner. Sulfonated chitosan nanoparticles meet the national safety standard for hemolysis rate of less than 5%, non-induced hemolysis property. Cytotoxicity assays showed that sulfonated chitosan nanoparticles extracts had no significant cytotoxicity, and its biological safety was in line with the national standards.

Effects of environmental enrichment on maternal behavior of rats with early life stress / 中华行为医学与脑科学杂志

Objective To investigate the improve effects of environmental enrichment on maternal behavior in the adult female rats thatexperienced early-life stress,and to explore the molecular biological mechanism.Methods The newborn Wistar rats were divided into two groups randomly,the early life stress group and the control group.Pups from the former were separated from their mothers once per day for 4 hours from PND 2-21 (day of birth was considered PND =0),and suffered vicious stimulus during the daily 4 hours maternal separation from PND 8-21.On PND 22(weaning),pups from the early life stress group were divided into two groups:12 female pups were reared singly,refered to as isolated-rearing group; another 12 were placed in a big cage that was filled with all sorts of rodents toys,refered to as enriched-rearing group; control female pups were placed in groups of 4 per cage.Mating with male rats when female pups reached PND66,then being placed in cages singly when they were detected pregnant.Maternal behavior was evaluated on the second and sixth day after delivery,and the hypothalamic OTR mRNA levels were examined by RT-PCR.Results The results of maternal behavior observation showed that the total time of retrieve and the latency of licking were significantly longer in isolated-rearing rats compared with the normal and the enriched-rearing rats (P ＜ 0.01) ; total time of licking in enriched-rearing rats was longer than the normal and the isolated-rearing rats(P＜0.01) on the sixth day after delivery;and the score of the nest building was obviously lower in isolated-rearing rats,especially on the sixth day after delivery(P ＜ 0.01).Hypothalamic OTR mRNA levels in the isolated-rearing rats showed strongly decreased compared with the normal rats(P＜0.01),but which close to normal levels in enriched-rearing rats.Conclusion Early life stress can damage some components of maternal behavior,such as retrieval,licking,nest building,but it has no obvious effect on crouching behavior; it also decreases the hypothalamic OTR mRNA levels of the adult female rats; as a kind of early environmental intervention,groups-rearing could make hypothalamic OTR mRNA levels of the female rats that subjected to early life stress restore to normal,and thus reverse the disruptions of stress in maternal behavior.

Effects of HSYA on expression of bFGF protein and MMP-9 in BGC-823 transplantation tumor of nude mice / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effects of hydroxy safflor yellow A (HSYA) on the expression of bFGF protein and MMP-9 mRNA or protein of transplantation tumor of gastric adenocarcinoma cell line BGC-823 in nude mice.</p><p><b>METHOD</b>The BGC-823 cells were subcutaneously injected into the right anterior armpit of BALB/C nu/nu nude mice, and the animal model of transplantation tumor was established. The experimental groups were treated with HSYA at concentration of 0.056 and 0.028 g x L(-1) and cyclophosphamide at 2 g x L(-1), or with physiologic saline. The tumor inhibitory effect was observed, and the mRNA expression of MMP-9 of transplantation tumor was detected by real time-fluorescent quantitation PCR and the protein expression of MMP-9 and bFGF were detected by enzyme linked immunosorbent assay.</p><p><b>RESULT</b>The IR in the group with HSYA at the concentration of 0.028 g x L(-1) is higher than in the group with normal sodium. After treatment with HSYA, the mRNA expression of MMP-9 has significant difference at the concentration of 0.028 g x L(-1) as compared with physiologic saline-treated group (P < 0.05), but the protein expression of MMP-9 and bFGF is obviously less than that in the physiologic saline-treated group (P < 0.05).</p><p><b>CONCLUSION</b>The possible mechanism of HSYA in given concentration to antagonize tumor angiogenesis may be related with inhibiting the protein expression of MMP-9 and bFGF or the mRNA expression of MMP-9 in tumor tissue to reduce the degradation of blood vessel basilar membrane, and to restrain the migration of blood vessel and decrease the tumor vascularization.</p>

Effects of hydroxy safflor yellow A on blood vessel and mRNA expression with VEGF and bFGF of transplantation tumor with gastric adenocarcinoma cell line BGC-823 in nude mice / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effects of Hydroxy Safflor yellow A (HSYA) on the growth of blood vessel of transplantation tumor of gastric adenocarcinoma cell line BGC-823 in nude mice and its underlying mechanism of antagonizing tumor angiogenesis.</p><p><b>METHOD</b>The BGC-823 cells was subcutaneouly injected into the right anterior armpit of BALB/C nu/nu nude mice and established the animal model of transplantation tumor. Then nude mice were divided into 4 groups at random: model group, control group, high or low dosage of HSYA group. The model group were treated with normal sodium by intraperitoneal injection, HSYA groups were treated with HSYA at concentration of 0.056 g x L(-1) and 0.028 g x L(-1) by intraperitoneal injection, and in these groups each mouse was injected 2 times everyday with 0.2 mL by 4-6 hours interval. The control group were injected in enterocoelia 1 times every 2 days starting from the third day with cytoxan at 2 g x L(-1). 20 days later, the volume and weight of nude mice were observed. The pathological change of tumor tissue was observed under optical microscope. The mRNA expression of VEGF and bFGF of transplantation tumor were detected by real time quantitative PCR.</p><p><b>RESULT</b>The volume (607.42 +/- 252.96) mm3, weight (0.88 +/- 0.14) g of transplantation tumor, the mRNA expression level of VEGF 0.49 +/- 0.13 and bFGF 0.60 +/- 0.48 are reduced significantly after treatment with HSYA at the concentration of 0.028 g x L(-1) compared with physiologic saline-treated group (P < 0.05 or P < 0.01). The tumor pathological angiogenesis of HSYA group is also less obvious than the normal sodium-treated group.</p><p><b>CONCLUSION</b>HSYA in given concentration can inhibit the growth of BGC-823 transplantation tumor, and decreasing the mRNA expression of VEGF and bFGF, which suggests that inhibiting tumor angiogenesis may be one of the mechanisms of HSYA antagonizing tumor.</p>

MRSA INFECTION IN INTENSIVE CARE UNIT: A REPORT OF 6 CASES / 解放军医学杂志

Objective To explore the strategies of prevention and treatment of MRSA infection in ICU patients. Methods The clinical data of 6 patients with MRSA infection occurring at the same time in ICU were reviewed retrospectively. Results Vancomycin was given in 4 cases, 250mg twice daily, and teicoplanin was given in one case, 400mg once daily. MRSA cultures were negative in 5 cases after antibiotic treatment. Conclusions MRSA infection occurs frequently in ICU patients, and it spreads readily. Antibiotic treatment, isolation and bacteriological monitoring are very important measures for control of MRSA infection in ICU patients. [HS(1*2/3]