· AIM :To investigate the role of pericytes in growth of retinal microvascular endothelial cells with a co-culture system in order to understand some mechanism of angiogenesis in hypoxia induced retinal neovascular disorders.(RMECs) were isolated by a modified protocol using CD31 coated Dynabeads, and identified by immunocytochemical staining with anti-Factor Ⅷ and CD31 antibodies. Rat retinal pericytes were isolated and characterized by immunofluorescent staining with PDGFR-β; and desmin antibodies. Pericytes and RMECs were cultured in a contact co-culture system both under normoxia and hypoxia by Millicell chamber. RMECs proliferation was evaluated by MTT and cell cycle assay with flow cytometry. RT-PCR was used to detect the alteration of KDR/Flk-1 mRNA level in RMECs under normoxia or hypoxia in the co-culture system.harvested with the modified isolating method. The two cell types were identified by positive Factor Ⅷ, CD31 and PDGFR-β, desmin cytochemical staining respectively.RMECs proliferated significantly under hypoxia from 3 to 9d with a maximal rate on day 6 (24.9%, P ＜ 0.01) by MTT. In the co-culture system, the proliferation of RMECs was inhibited by pericytes. After 6d exposure to hypoxia,the fraction of S-phase RMECs number was greatly increased by 43.9% (P ＜ 0.01). In the co-culture system,RMECs proliferation was inhibited by pericytes through decreasing the fraction of S-phase cell number both under normoxia (3.6%, P＜0.05) and under hypoxia (15.1%,P＜0.01). KDR/Flk-1 mRNA level in single cultured RMECs was shown to increase approximately 1.3-fold when exposed to hypoxia. Compared with single cultured RMECs, co-culture with pericytes could decrease KDR/Flk-1 mRNA by 45.1% (P＜0.05) and 27.7% (P ＜ 0.05) under normoxia and hypoxia condition respectively.pericytes could inhibit proliferation of RMECs under both normoxia and hypoxia. The inhibition effects of pericytes maybe, at least in part, due to downregulation of KDR/Flk-1 of RMECs. These findings confirm that pericytes could be a potential inhibitor in the pathogenesis of retinal neovascularization.

This paper presents the detail methods which innovation activities are in harmony for fundamental medical physics ex- periment teaching without increasing course period and new equipment.

Ralstonia metallidurans CH34 was isolated from the deposit of a znic factory .The degradation of phenol by R .metallidurans CH34 was investigated. The results showed that R . metallidurans CH34 possesses high ability to degrade phenol with the biodegradation rate constant of 0.33 . The optimal pH , temperature and volume of medium for phenol degradation are pH 7.0 , 30℃ , and 20%(v/v), respectively . In addition , this strain retains its ability to degrade phenol in the presence of high concentration of heavy metal ion .The sodium citrate , sodium succinate can enhance the degradation of phenol.

Objective To study the relationship between environmental chemical elements,vires infection and dilated cardiomyopathy(DCM).Methods In 2008,233 patients with DCM(case group)and 150 patient with stable angina(control group)were chosen in Liaocheng People's Hospital and Yanggu People's Hospital,Shandong province.Population distribution and disease history were surveyed in the two groups.Human myocardial antibody IgG(AMA-IgG),Coxsackie B virus IgG(CBV-IgG),Adenofirus antibody IgG(ADV-IgG)were detected by ELISA in both the case group and the control group.Serum trace elements were detected in the two groups.The general chemical and toxicological indicators in drinking water of the high-and the low-incidence aireas of the disease were control group[60.00%(90/150),χ2=13.80,P<0.01)].Per capita annual income(Yuan,RMB)in the case group (3207.82±618.51)was lower than that of the control group[(5086.61±886.12),t=24.40,P<0.01].Personal alcohol consumption in the case group[(175.00±160.50)g/d]was higher than that of the control group[(110.22±100.03)g/d,t=4.40,P<0.01)].The rate of myocarditis in the case group[5.15%(12/233)]was higher than ADV-IgG in the cage group were 7.78%(7/90),6.67%(6/90)and 6.67%(6/90),respectively.Compared with those in the control group[3.33%(2/60),5.00%(3/60)and 5.00%(3/60),χ2=1.26,0.18,0.18,all P>0.05],no mg/L]in drinking water of the high-incidence areas were significantly higher than that of iron[(0.39±0.67)mg/L,t=2.11,P<0.05]and that of manganese[(0.15±0.14)mg/L,t=3.01,P<0.01]in the low-incidence arefas.The content of semm iron[(69.1±57.8)μmol/L]in the case group evidently exceeded the normal range(15.6-35.9 μmol/L)and obviously higher than that in the control group[(20.0±17.5)μmol/L,t=5.04,P<0.01].Conclusions Theso data do not support that DCM is related with persistent virus infection and autoimmunization.DCM is probably related with low incomes,high alcohol consumption,myocarditis,high iron and manganese contents in drinking water and high content of serum iron.

OBJECTIVETo explore the relationships between quality of life, negative life events, social support and suicide ideation among undergraduates in colleges.

METHODS3517 undergraduates in colleges were recruited by multistage stratified random clustered sampling method. Factors associated with suicide ideation were analyzed with logistic regression by scores of Beck Scale for Suicide Ideation(BSSI), Generic Quality of Life Inventory (GQOLI), Adolescent Self-rate Life Events Checklist (ASLEC), Social Support Rating Scale (SSRS) and a questionnaire on background information.

RESULTSThe rate of suicide ideation within 7 days was 14.1%, especially in females (15.96%), with single parent (23.79%) and disabled undergraduates (25.00%). The primary risk factors for suicide ideation were with low psychological function, material life, family/social support, lower availability of support and more negative life events.

CONCLUSIONThe prevalence of suicide ideation among these undergraduates was high, appropriate measures focusing on these risk factors should be implemented.

China ; epidemiology ; Cluster Analysis ; Female ; Humans ; Logistic Models ; Male ; Risk Factors ; Self-Injurious Behavior ; epidemiology ; Students ; psychology ; Suicide ; psychology ; Surveys and Questionnaires

OBJECTIVETo explore the cure effects of Jiangu Fufang on osteoporotic model induced by ovariectomy.

METHODRats were ovariectomized and administered drugs for 3 monthes. Bone mineral density and biomechanics properties, histomorphometric analysis and biochemical index such as calcium, phosphorus, alkaline phosphatase were detected.

RESULTJiangu Fufang could significantly increase bone density and biomechanics properties. The level of calcium, phosphorus and alkaline phosphatase were restored by Jiangu Fufang. Jiangu Fufang could significantly increase area of bone trabecula, thickness of cortical bone and bone trabecula.

CONCLUSIONJiangu Fufang could cure osteoporosis through increasing bone mineral density, improving bone biomechanics properties, and effecting bone metabolism.

Alkaline Phosphatase ; blood ; Animals ; Biomechanical Phenomena ; Bone Density ; drug effects ; Calcium ; blood ; Drug Combinations ; Drugs, Chinese Herbal ; isolation & purification ; pharmacology ; therapeutic use ; Female ; Femur ; physiopathology ; Lumbar Vertebrae ; drug effects ; pathology ; physiopathology ; Osteoporosis ; blood ; drug therapy ; physiopathology ; Ovariectomy ; Phosphorus ; blood ; Phytotherapy ; Plants, Medicinal ; chemistry ; Random Allocation ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo compare the impact of various types of neck dissection on postoperative shoulder function.

METHODSThe shoulder functions of 66 patients with oral squamous cell carcinoma (OSCC) and cN0 necks who underwent various types of neck dissection were evaluated by Constant's shoulder function test and neck dissection impairment index at least 12 months after surgery.

RESULTSThe patients with accessory spinal nerve reserved had better shoulder function than those with accessory spinal nerve resected. In the group with accessory spinal nerve reserved, the patients receiving selective neck dissection (SND) showed better shoulder function than those with modified radical neck dissection (MRND). The shoulder dysfunction and pain arising from SND were minor in patients with selective neck dissection.

CONCLUSIONSThe shoulder function after SND was superior to those after RND and MRND.

Adult ; Aged ; Aged, 80 and over ; Carcinoma, Squamous Cell ; pathology ; physiopathology ; surgery ; Female ; Humans ; Male ; Middle Aged ; Mouth Neoplasms ; pathology ; physiopathology ; surgery ; Neck Dissection ; methods ; Shoulder ; physiopathology

OBJECTIVETo explore the clinical classification method of keloids and providing a thread for the treatment of keloids.

METHODSTo summarize the 600 cases of keloid patients we accepted and diagnosed from November 2004 to October 2012, and filling in keloid patients information sheet, recording the keloids form by photographs, analyzing the treatment, putting forward the classification method of keloids in clinic.

RESULTSAccording to the position and quantity that keloids grow, the keloid patients are divided into four major categories:one in single site, one in each site, more than one in single site and more than one in each site; According to the area and thickness of keloids, the keloid single lesion is divided into four subclasses: type of small area and thin, type of small area and thick, type of large areas and thin,type of large areas and thick; According to the number of lesions, keloid multiple lesions is divided into two subgenera: isolated multiple and dispersion multiple, different kinds of keloids suit different methods of treatment.

CONCLUSIONThe clinical classification method of keloids can be used to provide thought for the treatment of keloids, and have a good application value.

Humans ; Keloid ; classification ; pathology ; therapy

OBJECTIVETo evaluate the incidence of postoperative hemorrhage in children undergoing adenoidectomy, and to discuss its possible causes.

METHODSIncluded in this study were children who underwent adenoid and/or tonsil surgery at Shenzhen Children's Hospital between January 2004 and November 2009. The change of hemoglobin (Hb) and hematocrit (Hct) were retrospectively analysed. The blood loss was estimated by the change of Hct.

RESULTSThere were 2078 cases that accomplished the inclusion criteria in the period of study. Ten children bled 0.5 - 4.0 hours after surgery, without superfluous hemorrhage during the operation and post-tonsillectomy. This represented an incidence of 0.48%of immediate postoperative haemorrhage among the 2078 procedures analyzed. Statistical differences were found between boys (0.21%) and girls (1.10%, χ² = 5.597, P < 0.05). The change of Hb and Hct was positively correlated (r = 0.95, P < 0.01), the blood loss was positively correlated with the bleeding time (r = 0.66, P < 0.05). The causes of postoperative hemorrhage were coagulation system deficits, chronic nasopharyngitis, deficient hemostasis and immoderate ravage. To control the postoperative hemorrhage, 2 postnasal packing under topical anaesthesia and 8 electrocautery under general anaesthesia were applied.

CONCLUSIONSPoor operative technique and deficient hemostasis are the major causes of primary hemorrhage. Prompt operation to control the postoperative bleeding should be done 2 hours after bleeding under general anesthesia in order to avoid severe complications.

Adenoidectomy ; adverse effects ; Adolescent ; Child ; Child, Preschool ; Female ; Hematocrit ; Hemoglobins ; analysis ; Humans ; Infant ; Male ; Postoperative Hemorrhage ; etiology ; Retrospective Studies ; Tonsillectomy ; adverse effects

Porcine epidemic diarrhea virus (PEDV) causes lethal diarrhea in piglets that leads to great economic losses in East Asia. It was reported that aminopeptidase N (APN) was the receptor for Transmissible gastroenteritis virus (TGEV), Human coronavirus 229E (HCoV-229E) and Feline coronavirus (FeCoV) which all belonged to group I coronavirus including PEDV. It was also confirmed previously that porcine aminopeptidase N (pAPN) could bind to PEDV, and anti-pAPN antibodies could inhibit the combination. To investigate whether pAPN was a receptor for PEDV, we transfected MDCK cells with porcine aminopeptidase (pAPN) cDNA and this enabled non-susceptible cells to support PEDV replication and serial viral propagation. Moreover, the infection was blocked by antibodies against pAPN, implying the critical role of pAPN during virus entry. In addition, immunofluorescence assays for detection of pAPN and PEDV antigens, together with neutralization assays using antibodies against pAPN, further confirmed the correlation between pAPN expression and viral replication in pAPN-transfected MDCK cells. These results indicated that pAPN is a functional receptor for PEDV.
Animals ; Antibodies ; pharmacology ; CD13 Antigens ; antagonists & inhibitors ; genetics ; metabolism ; Cell Line ; Coronavirus Infections ; enzymology ; metabolism ; Dogs ; Porcine epidemic diarrhea virus ; enzymology ; Swine