1.THE ANTAGONISTIC ACTIVITIES OF BOTH BACILLUS CEREUS 357 AND ITS ANTAGONISTIC SUBSTANCE AGAINST BOTYTIS CINEREA PERS. AND RHIZOCTONIA SOLANI
Xiaoxi CHEN ; Weiliang CHEN ; Debao LI ;
Microbiology 1992;0(04):-
Bacillus cereus 357 and its antagonistic substance can effectively ant agonize Botytis cinerea Pers and Rhizoctonia solani They can inhibit or kill t he hyphae of Rhizoctonia solani and Botytis cinerea Pers In addition, they can inhibit the growth of hyphae?the formation as well as the germination of spore of Botytis cinerea Pers The antagonistic substance is stable against heat ?acid and alkali and enzyme
2.Poly (ADP-ribose) polymerase-1 and ischemic brain injury
Xiaoxi LI ; Yanting CHEN ; Yun XU
International Journal of Cerebrovascular Diseases 2014;22(12):946-949
Poly (ADP-ribose) polymerase-1 (PARP-1) is a ribozyme that widely exists in the cukaryotic cells.It plays important roles in the maintenance of genomic stability and the regulation of gene transcription and other physiological processes.PARP-1 is overactivated after ischemic brain injury,and PARP-1 gene knockout mice or PARP-1 inhibitor can reduce brain injury in a variety of models of cerebral ischemia.Therefore,PARP-1 plays important roles in the pathophysiologic processes of ischemic brain injury.The investigation of the effect of PARP-1 in cerebral ischemia contributes to further understanding the pathophysiologic mechanism of stroke and finding a new therapeutic target.
3.The effects of hyperbaric oxygen on the histopathologic charateristics in periodontitis tissues in guinea pig
Tielou CHEN ; Jingchang LIU ; Xiaoxi WANG
Journal of Practical Stomatology 2000;0(05):-
Objective: To study the effects of hyperbaric oxyge(HBO) in the treatment of periodontitis.Methods: 60 Guinea pigs were divided into 3 groups, 20 animals each group: ①Experimental periodontitis was induced by silk suture and feeding with the food containing 100 g/L of sugar and then exposed to 0.25 MPa of HBO for 60 min once a day when periodontitis established; ② the other 20 animals were simillary treated to group ① but not exposed to HBO; ③ another 20 animals were used as controls. HBO treatment was conducted for 2 weeks. Samples of periodontal tissues were obtained 0,4,8 and 10 weeks after treatment and prepared for histopathological study and electron microscopic observation.Results: In the treated group there were fewer macrophages in gingiva and periodontal ligment, more blood vessles, less absorption of alveolar bone, more osteoblasts and more osteogenesis in the bone. There were fewer metochodria and rough endo reticulum in plasmacytes, macrophages and osteoclasts; and more in fibroblasts, endothelial cells of blood vessles and osteoblasts. Conclusion: HBO may improve blood supply, inhibit macrophage and bone absorption.
4.Cavernous hemangiomas in infants:a new classification
Xiaoxi LIN ; Wei LI ; Da CHEN
Chinese Journal of Medical Aesthetics and Cosmetology 2001;0(04):-
Objective Cavernous hemangioma of infant was reported as an obscure diagnosis with the different sensitivity to corticosteroid therapy and various natural courses. Therefore, a clinical studies for the biological classification of deep subcutanious vascular lesions might be needed, which was alluded by Mulliken two decades ago. Methods Infants with cavernous hemangiomas accepted normal system corticosteroid therapy during the first 6 months of life before eight-year-follow-up, which continued until the children were 9 to 10 years old. The expression of PCNA and bFGF, and cellular histological characteristics were observed in 12 cases by biopsy. Results There were two major categories of subcutaneous vascular lesions groups: deep capillary hemangiomas, a lesion regressing slowly, and venous malformation, a lesion growing commensurated with the child. They will be also distinguished on the basis of diverse final treatment results, expression of cellular markers, microscopical characteristics, and physical signs. Conclusion The new classification appears to be helpful to make the choice of therapy for infants with "cavernous hemangiomas" , which is proven to be a terminologic confusion.
5.Effect of Home-based Rehabilitation on Cerebral Palsy
Xi CHEN ; Xiaoxi WANG ; Wei ZHAO
Chinese Journal of Rehabilitation Theory and Practice 2008;14(5):465-466
Objective To explore the effect of home-based rehabilitation on cerebral palsy.Methods 60 children with cerebral palsy were assigned to hospital-based rehabilitation group and hospital-home-based rehabilitation group and treated for 1 year.Every child was evaluated before and after the treatment with Bayley Scales of Infant Development(BSID).The Mental Development Index(MDI) and Physical Development Index(PDI) were compared between these two groups.Results After one year,the MDI and PDI improved in both groups(P<0.05),while those of the hospital-home-based rehabilitation group was better than of the hospital-based rehabilitation group(P<0.05).Conclusion Home-based rehabilitation plays an important role in the rehabilitation of cerebral palsy children.
6.Diagnostic therapy and safety assessment of tulobuterol tape in suspected wheezing children
Hong ZHANG ; Xia CHEN ; Xiaoxi CHEN ; Hongzhen XU
Chongqing Medicine 2014;(36):4906-4908,4913
Objective To conduct the diagnostic treatment in the children under 5 years old with suspected asthmatic disease and to evaluate its safety .Methods The children outpatients with suspected asthmatic diseas were selected and divided into the experi‐mental group and the control group according to odd days and even days .The conventiona therapy of anti‐infection ,relieving cough , reducing sputum and supporting treatment were administered in both groups .The experimental group was added tulobuterol tape . The cough relieve on daytime and nighttime ,initial effective time ,cough disappearance time and occurrence rate of adverse events at 24 ,72 h and on 5 d after treatment were compared between the two groups .Results The total effective rate of cough sysmptom re‐lief in the experimental group at 3 time points and nighttime was higher than that in the control group with statistical difference be‐tween the two groups(P < 0 .05) .The initial effective time had no statistically significant difference in daytime between the two groups(P> 0 .05) ,but which in daytime showed the statistically significant difference (P < 0 .05) ,especially the cough disappear‐ance time at nighttime in the experimental group was significantly shortened than that in the control group( P < 0 .05) .The oc‐curence rate of adverse events had no statistical difference between the two groups(P > 0 .05) .Conclusion Tulobuterol tape by transdermal delivery as one of diagnostic treatment measures for children under 5 years old with suspected asthmatic disease is defi‐nitely effective ,safe and convenient in application with the high compliance for children patients and acceptability by the family members ,obviously shortens the course of treatment ,which is worthy of being promoted .
7.Study of photosensitizers absorbed process by cells based on image processing technology
Zhan SHU ; Yingxin LI ; Jichun YANG ; Hongli CHEN ; Xiaoxi DONG
International Journal of Biomedical Engineering 2012;35(2):-
ObjectiveTo study the feasibility of analyzing photosensitizers absorbing process by cells based on image processing technology.MethodsFluorescence images of Laryngeal cells were taken by inverted fluorescence microscope after adding photosensitizers for a certain time.Parameter L that reflects the fluorescence intensity of cells in different times was obtained and the calculation results were compared.ResultsThe fluorescence intensity of cells increased over time.Sobel operater and Otsu algorithm can both reflect the fluorescence intensity of images.ConclusionImage processing technology can effectively analyzes the process of photosensitizers absorbed by cells.
8.Angiotensin Ⅱ-induced podocyte apoptosis:Role of the MAPK subtypes
Xiaoxi LAI ; Guohua DING ; Congxin HUANG ; Ming SHI ; Cheng CHEN ;
Journal of Peking University(Health Sciences) 2004;0(02):-
Objective: To evaluate the role of the MAPK subtypes (p38MAPK, ERK and JNK) in ANG Ⅱ induced apoptosis of cultured human podocytes. Methods: The cultured podocytes were incubated in media containing either vehicle, SB202190(5 ?mol/L, an inhibitor of p38MAPK), PD98059 (1 ?mol/L, an inhibitor of ERK), SP600125 (5 ?mol/L, an inhibitor of JNK), ANG Ⅱ (10 -8 mol/L) with or without SB202190、PD98059 and SP600125 for 18 hours; the cells were assayed for apoptosis by morphologic staining with H 33342 and propidium iodide and DNA fragmentation assays; the cell proteins were probed for phosphorylated MAPKs to determine the activation of specific MAPK subtypes. Results: ANG Ⅱ promoted podocyte apoptosis in a time and dose dependent manner; ANG Ⅱ stimulated p38MAPK, but inhibited JNK; SB202190 inhibited both ANG Ⅱ induced podocyte apoptosis and p38MAPK phosphorylation; Inhibition of ERK by PD98059 had no effect on ANG Ⅱ induced cell apoptosis. Conclusion: ANG Ⅱ induced apoptosis through stimulation of p38MAPK and inhibition of JNK in human podocytes.
9.Effect of transcutaneous multi-electrical acupoint stimulation for prevention of PONV in patients under-going thoracoscopic lobectomy
Xiaoxi LI ; Jiheng CHEN ; Zhiyi FAN ; Yunxiao ZHANG
The Journal of Clinical Anesthesiology 2016;32(4):333-336
Objective To investigate the effect of transcutaneous electric acupoint stimulation (TEAS)of Hegu-Neiguan-Houxi-Zhigou for preventing postoperative nausea and vomiting (PONV) in patients undergoing thoracoscopic lobectomy.Methods Sixty-four ASA physical status Ⅰ-Ⅲ pa-tients,aged 18-75 years,scheduled for elective thoracoscopic lobectomy were enrolled.Patients were randomly allocated into two groups (n =32):TEAS group (group E)and sham TEAS group (group C).TEAS at Hegu,Neiguan,Houxi and Zhigou was applied to patients before,during and after sur-gery in group E.The frequency was 2/100 Hz and the intensity was 2 times the threshold of sensation before and after surgery,and 30 mA during surgery.While sham TEAS with the intensity of sensory threshold was given to patients before and after surgery in group C.Patients in both groups received sufentanil,propofol and rocuronium for induction of anesthesia.Target controlled infusion of propofol and remifentanil was administered for maintenance of anesthesia.Patient-controlled intravenous anal-gesia (PCIA)was applied in both groups.No antiemetic was given to patients before and during sur-gery.Frequency of nausea or vomiting and any use of antiemetic for remediation were recorded after surgery.The postoperative Visual Analogue Scale (VAS)score and analgesic dosage were also docu-mented.Results Compared to group C,the incidence of nausea immediately after surgery,6 h after surgery,24 h after surgery and 48 h after surgery were significantly lower in group E.The incidence of vomiting 24 h after surgery was significantly lower in group E.The VAS score 6h and 24 h after surgery were significantly lower in group E.The analgesic dosage 48 h after surgery were reduced in group E.There were no significant differences regarding the use of antiemetic for remediation between the two groups.Conclusion TEAS at Hegu-Neiguan-Houxi-Zhigou is effective for preventing PONV in patients undergoing thoracoscopic lobectomy.
10.The random and comparative study on therapeutic effect and safety between Levetiracetam and Phenobarbitaladministration for neonatal seizures
Jie LI ; Yuexia YANG ; Xi CHEN ; Xiaoxi WANG ; Lan JIANG
Chinese Journal of Applied Clinical Pediatrics 2016;31(12):910-914
Objective To randomly compare the therapeutic effect and safety between Levetiracetam (LEV) and Phenobarbital (PB) in the treatment of neonatal seizures.Methods A total of 61 infants with acute convulsion were randomly divided into 2 groups:LEV group (n =30) and PB group (n =31) during January 2013 to December 2014 in Urumqi Children's Hospital.All neonates received routine management including etiology treatment and adverse drug reaction monitoring.In the LEV group,subjects received oral formulation of LEV with initial loading dose 30 mg/kg,followed by 15 mg/kg twice a day.If the seizures were not controlled completely,PB treatment was added until seizures were completed controlled.If seizures were controlled quickly,the dose of PB was gradually reduced and LEV was used as monotherapy.The subjects in PB group received intramuscular or intravenous injection of PB with 10 mg/kg as the first dose,then 5 mg/(kg · d) oral PB was administered,if seizures were not controlled,LEV treatment was added,then dose of PB was gradually reduced until seizures were controlled completely,and then patients were switched to LEV monotherapy gradually.The drug adverse reactions were observed.Results (1) After LEV or PB monotherapy,66.7% (20/30 cases) and 54.8% (17/31 cases) of the subjects obtained sustainable seizure free respectively.Although,there was a higher control ratio in LEV group,but no significant difference was observed between the 2 groups (P >0.05).(2) LEV group (16/30 cases,53.33%) had higher rapid seizure control ratio with seizure controlled within 24 h after first dosage administration than that of PB group (8/31 cases,25.80%),and there was significant difference (x2 =4.841,P =0.028).Further more,if adding the cases who had to change to use another comparative one (LEV or PB) due to their seizures failure control with the first one treated,LEV group (21/44 cases,47.72%) still had higher rapid seizure control ratio in total patients than that of PB group(10/41 cases,24.39%),and there was significant difference (x2 =4.988,P =0.026).(3) Eight cases who changed to LEV after PB as the first treatment drug failed obtained sustainable seizure free.(4) One case in PB group with transient urinary retention was observed but the symptom disappeared 36 h after PB withdrawal,and no significant drug adverse reaction was observed in LEV group.Conclusion LEV is more rapid and safe for seizure control of neonates than PB.