The daily intake levels and trend of polychlorinated dibenzo-p-dioxins(PCDDs), polychlorinated dibenzofurans(PCDFs), polychlorinated biphenyls(PCBs) of general population of several developed countries are reviewed. Based on the data of China, PCDD-Fs levels in Chinese human milk and blood were less than that of other countries, in addition, a daily intake of PCDD-Fs for Chinese general population was estimated in the present paper, the tolerable daily intake of Chinese general population was less than that the World Health Organization proposed.

Tetrabromobisphenol-A (TBBP-A) is the most widely used brominated flame retardant in the world. It is a kind of potential environmental endocrine disruptor, similar to the persistent organic pollutants. It can accumulate in the environment and biota and it has adverse effects on the environment and the living creature, such as disrupting the action of hormones related to the skeleton and brain development. Research progresses on TBBP-A, including toxicology, analysis methods, were reviewed in this paper.

Congenital malformations of the external and middle ear is the common reason of pediatric hearing impairment and cosmic problem. The treatment composes of auricular plastic surgery and auditory reconstruction surgery. The use of BAHA, vibrant sound-bridge and tissue engineering materials can significantly improve the treatment outcomes.
Contraindications ; Ear, External ; abnormalities ; surgery ; Ear, Middle ; abnormalities ; surgery ; Hearing Aids ; Humans ; Infant, Newborn ; Reconstructive Surgical Procedures ; Treatment Outcome

Objective To investigate the activity changes of gelatinase in the formation of ascending aortic aneurysm.Methods Thirty five young Wistar rats were divided into two groups:the control group and the experiment group.The rat models induced by ascending aorta banding were made.The ascending aortas were taken after 3-5 months operation,changes of gelatinase activity was observed by gelatin zymography and film in situ zymography.Results Gelatinase activity of ascending aortic aneurysm was significantly increased compared with that of normal ascending aortic aorta.Conclusion Elevation of gelatinase activity may play a significant role in the formation of ascending aortic aneurysm.

Objective To investigate the expressions and significance of transforming growth factor-beta 1(TGF?1) and its typeⅡ receptor(TGF?RⅡ) in experimental rat ascending aortic aneurysm of rat model.Methods The rat ascending aortic aneurysm models were made by banding ascending aorta of young Wistar rats.The ascending aortas were taken 4 months after operation.Immunohistochemistry staining and Western blotting were used to investigate the expressions of TGF?1 and TGF?RⅡ.Result Immunohistochemistry staining results showed that TGF?1 expressed in all layers of the aortic aneurysm and the control.TGF?RⅡ was extensively located in the hyperplastic intima and tunica media smooth muscle cells in the aortic aneurysm,while there was only a little positive staining in the control group.Western blotting results indicated that the expression levels of TGF?1 and TGF?RⅡ in the aortic aneurysm were stronger than the control,P

Postoperative surgical site infection (SSI) can lead to adverse clinical outcomes in patients, such as prolonged hospital stay, increased medical costs, and severe economic burden on patients and on society.In addition, it may also cause nosocomial cross-infection.Therefore, it has aroused the high attention of medical workers.The development of SSI is closely related to a variety of factors, including patient factors, such as blood glucose levels, smoking, systemic use of steroids, obesity and malnutrition, and perioperative related factors, such as long preoperative hospital stay, preoperative skin preparation and prophylactic use of antibiotics of patients, hand hygiene and asepsis principles of medical staff, operation-related factors, anesthetic management and operation related factors, operating room environment factors and postoperative factors.Through reading a large number of relevant literatures published in recent years and according to the work characteristics of anesthesiologists, the author summarized the influential factors and preventive measures for postoperative SSI for the reference of fellow doctors.

Objective To compare clinical outcomes in cardiac transplant recipients treated with individualized dosing (ID) and fixed dosing (FD) of mycophenolate mofetil (MMF).Methods Fortyeight de novo cardiac transplant patients in ID group received MMF (2.0 g/day) in combination with calcineurin inhibitors and prednisone.The MMF dosages were adjusted individually based on clinical events and MPA trough levels (MPA-C0).The target range of C0 was maintained within 2.0-4.0rng/L.The FD group included 55 recipients retrospectively from the transplant database who were also treated with MMF (2.0 g/day).In this group,the MMF dose adjustment was performed empirically according to clinical events only.All of the follow-up data were collected up to 12 months post-transplantation.Results The follow-up rate was 95.8％ and the mean MPA-AUC0-12 was (54.37± 17.03) rng h-1 L-1 in the ID group.The mean MPA-C0 on the day 7 post-transplantation was significantly higher in the ID group than that at 12th month [(3.44 ± 0.58) mg/L vs.(2.79 ± 0.54)mg/L] (P＜0.05).The dose of MMF was significantly lower in the ID group at 4th week posttransplantation than in control group [(1.49± 0.48) g/day vs.(1.96 ± 0.39) g/d] (P＜0.05),while there was no significant difference at 12 th month post-transplantation [(1.61 ± 0.77) g/day vs.(1.68 ± 0.84) g/day] (P＞ 0.05).No significant difference was found in the incidence of acute rejection episode between two groups (8.7％ vs.9.1％,P＞0.05).57.6％ of overall side effects were observed within one month postoperatively,and the incidence of MPA-related side effects was significantly lower in the ID group than in the control group (47.8％ vs.67.3％,P＜0.05).Conclusion It was demonstrated that individualized use of MMF based on therapeutic drug monitoring may prevent MMF-related side effect and appears to be valuable to optimize the treatment of cardiac transplantation.

OBJECTIVE To design and construct eukaryocyte expression vector of SV40 virus large T antigen and induce its targeted expression in eukaryocyte.METHODS SV40 large T gene which excised intron was cloned by SOE(splicing by overlapping extension) and digested with restricted enzymes EcoR Ⅰ and BamH Ⅰ.By the same methods,we got the digested product of pEGFP-N1.After that,the two fragments were ligated to form SV40(TEGFP) by Ligation Kit,and sequenced by TaKaRa ABI Prism Terminator Cycle Sequence Kit.The reconstructed vector was transfected into primary cultured human fibroblast using a Lipofectin transfection method.At 48 h(after) transfection,the expression of SV40T was detected with PCR and RT-PCR using specific primer of T gene.(RESULTS) The restricted enzymes digested and sequencing results showed that SV40 large T gene had cloned into pEGFP-N1 vector successfully.The genome DNA and total RNA were isolated from the positive cells.With these samples,the specific 288 bp fragment was amplified using PCR and RT-PCR.CONCLUSIONS The recombinant plasmid SV40TEGFP will be a stable and valuable molecular tool for human eukaryocyte study.

Objective To investigate the effects of rapamycin on p-JAK2,STAT3,p-STAT3 and PCNA in ranal tissue of IgAN rats.Methods The animal models of IgA nephropathy were devided into control group,IgAN model group,losartan group and rapamycin group.The clinical efficacy of rapamycin,and its influences on the protein and mRNA expressions of STAT3,p-STAT3,p-JAK2 and PCNA were determined by western blot,RT-PCR and immunohistochemical techniques respectively.Results The protein and mRNA expressions of p-STAT3,STAT3,p-JAK2 and PCNA were significantly increased in kidney of IgAN rats(P

Objective To study the efficacy and safety of different simvastatin doses on hyperlipidemia in the elderly .Methods 120 patients with hyperlipidemia were randomly divided into two groups ,60 cases in each group ,patients were given simvastatin 10 mg/d(10 mg/d group) or 20 mg/d(20 mg/d group) .Data were collected before and after treatment ,including total cholesterol (TC) ,three acyl glycerin (TG) ,low density lipoprotein cholesterol (LDL-C) ,high density lipoprotein cholesterol (HDL-C) ,treat-ment efficacy and adverse reactions events .Results 3 month after treatment ,TC ,TG ,LDL-C and HDL-C were better than before treatment in both groups(P<0 .05);and the curative effect in 20 mg/d group was better than 10 mg/d group(P<0 .05) .There was no significant difference in incidence of adverse reactions events between the two groups (P>0 .05) .Conclusion 20 mg/d simvasta-tin is better than 10 mg/d simvastatin in efficacy of elderly patients with hyperlipidemia ,and offers a safe and reliable treatment .