Object to define defects of drug accurately and to initially discuss its law responsibility. Method With comparative study and system thinking,we acquired few scientific recognition of drug’s defects. Result & Conclusion Defects of drug are not equal to negative drug reaction. The former one should be an unreasonable and potential risk which induces no expectant therapeutic efficacy to provide. And its law responsibility could be no-fault liability accompanied by state compensation.

Objective To investigate the characteristics of pathogenic bacteria/the drug resistance/the correlated risk fators/the prophylaxis control strategy of the severe craniocerebral injury patients combined with intracranial infection .Methods The clinical data of 35 craniocerebral injury patients with intracranial infection were retrospectively analyzed .Results 35 patients′cerebrospinal fluid were separated and 54 pathogenic bacterium had been cultured ,including G+ bacterium(61 .11% ) ,the G - bacteria(33 .33% ) , fungi(5 .56% ) .The pathogenic bacteria showed a higher resistance .The single factor analysis found that the wound itself exists in-fection factors ,the postoperative drainage of incision ,liquorrhoea ,with other basic diseases ,surgery lasted for a long time (>4 h) reoperative ,surgery is placed foreign body is severe craniocerebral trauma combined with intracranial infection were the main rele-vant factors .The total effective rate was 62 .86% ,and the mortality was 11 .43% by the positive therapy .Conclusion G+ bacteria were the main pathogenic bacterium in the severe craniocerebral injury patients combined with intracranial infection .The iatrogenic factors leaded to the increase of the proportion of intracranial infection and the resistance increased year after year .The clinical in-travenous antibiotics combined intrathecal injections were beneficial to control intracranial infection ,shorten the course of treatment and enhance the curative effect .

Objective To evaluate hepatic enhancement technology with MRI and its clinical application.Methods 147 patients underwent enhanced MRI scanning and an automatic injector.Total dose of contrast agent for each patient was 10 to 15ml(0.2mmol/kg)at a rate of 2ml/s,Two-phase enhancement were performed at a delay of 30 and 70 seconds respectively after the initiation of bolus injection.Results Good visualization of two phases for both hepatic artery and portal vein were achieved in 147 patients in addition to branches of abdominal aorta,hepatic artery,splenic artery,portal vein,inferior vena cava and vasculatures in hepatic port.The 4 patients did not have ideal two-phase images for various reasons.Conclusion MRI with bolus injection using an automatic injector can satisfy the diagnosis for hepatic diseases.

Adolescent ; Adult ; Child ; Child, Preschool ; Female ; Humans ; Hypothalamic Neoplasms ; pathology ; radiotherapy ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Pituitary Neoplasms ; pathology ; radiotherapy

Objective To investigate the relationship between spontaneous miscarriage and embryonic chromosome abnormalities,and to evaluate the clinical application of karyotype analysis by chorionic villus cell culture. Methods The chorionic villus karyotype of 1983 cases of miscarriage from January 2010 to July 2016 in Guangzhou Women and Children′ s Mecical Center were analyzed retrospectively. The miscarried chorionic villi were obtained by curettage under sterilized condition. The chromosome specimens were prepared after chorionic villus cell culture. Karyotype analysis was performed by G-banding technique. Results In the 1983 samples, successful karyotype analysis was performed in 1770 cases, with the successful rate of 89.98%. Chromosomal abnormalities were found in 1038 cases (58.64%,1038/1770). Chromosomal structural abnormalities were found in 37 cases. The numeral abnormalities were more common than structural abnormalities, and most of the numeral abnormalities were aneupoidies. In turn, they were trisomy 16, 45,X, trisomy 22, trisomy 2, trisomy 21, trisomy 15. The most common structural abnormality was balanced translocation, including Robersonian translocation. Female embryoes accounted for 61.02%(1080/1770) miscarriages and for 57.4%(596/1770) of chromosomal abnormalities, while male embroyes acoounted for 61.02%(1080/1770),57.4%(596/1770)respectively. The proportion of female embryoes was higher than male embryoes. The median age of the patients was 30 years old(16-46 years old). As the maternal age increased, the proportion chromosomal abnormalities increased. The incidence of chromosomal abnormalities in the advanced age group (≥35 years) was 68.38%(240/351), which was significantly higher than that in the younger group (56.24% ,798/1419; χ2=17.10, P<0.01). Conclusions Embryonic chromosomal abnormalities are the most common cause of early spontaneous miscarriage. The abnormalities centralize in some karyotypes. There is certain relationship between maternal age and the incidence of miscarriage, as well as the embryonic gender. Chorionic villus cell culture and karyotype analysis are helpful in finding the cause of miscarriage and counsel the patients.

Objective To evaluate the effect of discussion-based teaching pattern in clinical noviciate of general surgery. Methods Two hundred and ten students majoring in clinical medicine were randomly divided into the trial group and the control group during clinical noviciate of general surgery.There were 105 students in each group. The discussion-based teaching pattern and traditional teaching pattern were performed in the trial and control groups,respectively. After the clinical novici-ate of general surgery was completed,the teaching effects of both groups were evaluated by the exam-ination performance analyses and the questionnaire-based survey. Student's t-test andχ22 test were used in statistical analysis. Reults The rate of satisfaction with the teaching pattern was 88.6%in the trial group and 70.5%in control group(P<0.05). The mean scores in the trial group and control group were 80.3±9.2 and 74.5±11.3,respectively (P<0.05). The pass rate of examination in the trial group and control group were 97.1% and 88.6%,respectively (P<0.05). The excellence rate in the examination was 24.8%in the trial group and 12.4%in control group (P<0.05). The overwhelming majority of stu-dents in the trial group thought that the discussion-based teaching pattern had more advantages in im-proving students' learning initiative and enthusiasm,ability to analyze and solve problems,etc.,acord-ing to the questionnaire-based survey. Conclusions Discussion-based teaching is an effective teach-ing pattern and superior to the traditional teaching pattern.

The direct acting substances of Cuscuta chinensis in vivo were preliminarily identified through the correlation analysis of "metabolites-effect identification" model. The ovariectomized female rats were i.g administered with 95% ethanol extract part, 40% ethanol elution part and n-butanol extract part of Cuscuta chinensis. The serum fingerprints of different parts and times of administration were established by UPLC/Q-TOF-MS. At the same time, serum estradiol (E₂), follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels were detected. Bivariate correlation analysis and grey correlation analysis were used to screen estrogenic components. The results showed that nine direct acting substances in vivo highly related to estrogen effect were found in the drug containing serum, which were hyperoside, astragalin, methyl quercetin glucuronide, quercetin-diglucuronide, quercetin, apigenin, isoquercitrin, kaempferol glucuronide and kaempferol. We can preliminarily screen out the direct acting substance of estrogen effect of Cuscuta chinensis in vivo based on the research idea of serum spectrum effect correlation. It provides a reliable basis for revealing the estrogeneffective substances of Cuscuta chinensis and confirming the quality markers. This experiment was approved by Harbin University of Commerce Ethics Committees (Approval No. HSDU2020-065).

Abdominal aortic aneurysm (AAA) is a life-threatening disorder worldwide. Fibroblast growth factor 21 (FGF21) was shown to display a high level in the plasma of patients with AAA; however, its detailed functions underlying AAA pathogenesis are unclear. An in vitro AAA model was established in human aortic vascular smooth muscle cells (HASMCs) by angiotensin II (Ang-II) stimulation. Cell counting kit-8, wound healing, and Transwell assays were utilized for measuring cell proliferation and migration. RT-qPCR was used for detecting mRNA expression of FGF21 and activating transcription factor 4 (ATF4). Western blotting was utilized for assessing protein levels of FGF21, ATF4, and markers for the contractile phenotype of HASMCs. ChIP and luciferase reporter assays were implemented for identifying the binding relation between AFT4 and FGF21 promoters. FGF21 and ATF4 were both upregulated in Ang-II-treated HASMCs. Knocking down FGF21 attenuated Ang-IIinduced proliferation, migration, and phenotype switch of HASMCs. ATF4 activated FGF21 transcription by binding to its promoter. FGF21 overexpression reversed AFT4 silencing-mediated inhibition of cell proliferation, migration, and phenotype switch.ATF4 transcriptionally upregulates FGF21 to promote the proliferation, migration, and phenotype switch of Ang-II-treated HASMCs.

AIM:To determine the role of Kv1 2, Kv1 5, Kv2 1 in the hypoxia pulmonary vasoconstriction (HPV). METHODS: Male Wistar rats were divided into two groups: normoxic group and hypoxic group. The single smooth muscle cell was obtained from pulmonary artery of Wistar rats with acute enzymatic digestion method. The conventional whole-cell patch clamp technique was used to record the resting membrane potential (Em) and the potassium currents of voltage-gated potassium channel (IKv) in rat pulmonary arterial smooth muscle cells (PASMC). Intracellular application of Kv1 2/Kv1 5/Kv2 1 antibodies (1∶125) was conducted through the whole-cell patch clamp system. RESULTS: ① Em of PASMC was depolarized after 24 h hypoxia compared with that of control cells [from (-51 8?0 8) mV to (-47 2? 0 7) mV, P

OBJECTIVETo improve the survival of mesenchymal stem cells (MSCs) for prefabrication of an osteo-musculo-cutaneous flap.

METHODSIn a mouse model, the compound of MSCs and p(3HB-co-3HH) were embeded in the latissimus dorsi muscle as an experimental group and the muscle pocket of the buttock as the control. The examinations of the HE staining, hybridization in situ of osteonectin mRNA and Von kossa staining were used to evaluate the results.

RESULTSThe expression of osteonectin mRNA and the Von kossa staining showed that the latissimus dorsi muscle group was superior to the control in 2 weeks and 4 weeks after the surgery in vivo.

CONCLUSIONThe results indicate that the above-mentioned technique may be a good alternative for the prefabrication of the osteo-musculo-cutaneous flap.

Animals ; Fascia ; transplantation ; Histocytochemistry ; methods ; In Situ Hybridization ; Male ; Mice ; Mice, Nude ; Models, Animal ; Osteonectin ; genetics ; metabolism ; RNA, Messenger ; genetics ; metabolism ; Staining and Labeling ; Stem Cell Transplantation ; methods ; Surgical Flaps ; blood supply ; Tissue Engineering ; methods