Based on previous results of 16S rDNA sequence homologuous and results of physic-biochemical indexes and morphological characteristics in the present work, bacterial strain ge15 isolated from roots of ginseng plants was identified as Stenotrophomonas rhizophila. Confronting incubation results showed that, strain ge15 inhibited the growth of Alternaria panax, Phytophthora cactorum, and Cylindrocapon destructans significantly, and the width of inhibition zone was 13.3, 24.0, 12.0 mm, respectively. Further results showed that the emergence rate and seedling survive rate of ge15 treatment was significantly higher than those of the control, and which was similar to pesticide carbendazol treatment. The ge15 strain has good application potential in ginseng diseases control without contamination.
Alternaria ; growth & development ; physiology ; Antibiosis ; Biological Control Agents ; Hypocreales ; growth & development ; physiology ; Panax ; growth & development ; microbiology ; Phytophthora ; growth & development ; physiology ; Plant Diseases ; microbiology ; Plant Roots ; growth & development ; microbiology ; Seedlings ; growth & development ; microbiology ; Stenotrophomonas ; classification ; cytology ; isolation & purification ; physiology

The effect of pioglitazone on the expression of genes relative to differentiation and function of primary brown adipose tissue cells was detected for the new treatment of obesity and type 2 diabetes.The results showed that pioglitazone promoted the differentiation and function of brown adipocytes( P＜0.05 ).

Objective:To construct a recombinant retroviral vector carrying human inducible costimulator (ICOS) gene,screen for CHO cell line stably expressing ICOS protein and to study its biological activity.Methods: ICOS cDNA was obtained from human peripheral blood mononuclear cells (PBMC) through RT-PCR and was cloned into retroviral vector to construct retroviral recombinant pMSCV-ICOS; the latter was then packed and the high-titer virus producing cells were screened.Then CHO cell was infected by this high-titer virus and the stable cell line was screened.CHO-ICOS cells were co-cultured with PBMC (the ratio of CHO-ICOS to PBMC being 11,12,15, and 110) in presence of substimulating dose of anti-human CD3 antibody.The proliferation of PBMC and the CD25 expression on T cells were examined by 3H-TdR incorporation method and flow cytometry,respectively.CHO-pMSCV cells co-cultured with PBMC (11) served as the negative control and PBMC served as blank control.Results: We successfully constructed the retroviral recombinant pMSCV-ICOS and obtained CHO cell line stably expressing ICOS protein.3H-TdR incorporation method and flow cytometry showed that,compared with the negative control group and the blank control group,co-culture with CHO-ICOS cells significantly inhibited the anti-CD3 antibody-induced activation and proliferation of PBMC(P

BACKGROUND:Ti6Al4V is a titanium aloy that is widely used in human joint replacement, but its modulus of elasticity is greater than human bone, resulting in the bad stability of the prosthesis. Ti35Nb3Zr2Ta, a new βtitanium aloy, has a lower modulus of elasticity, and maybe becomes a new-generation human joint prosthesis material that has a better biocompatibility. OBJECTIVE:To study the biocompatibility of Ti35Nb3Zr2Ta in prosthesis. METHODS:Wanfang, CNKI and PubMed databases were retrieved using a computer with “new β titanium;prosthesis; biocompatible” as keywords, and the retrieval time ranged from 2010 to 2015. Articles focusing on current application status for medical prosthesis materials and the biocompatibility of Ti35Nb3Zr2Ta in prosthesis were selected. RESULTS AND CONCLUSION:Compared with Ti6Al4V, Ti35Nb3Zr2Ta has higher surface roughness and smaler surface contact angle; the alkaline phosphatase activity and amount of calcium deposits in osteoblasts cultured at Ti35Nb3Zr2Ta is significantly higher than that at Ti6Al4V. Ti35Nb3Zr2Ta has good biocompatibility, and can be considered to be widely used as joint prosthesis material further.

Objective To evaluate the surgical methods and clinical effects of the reconstruction of soft tissue defect in distal thumbwith dorsal thumb neurocutaneous vascular flap.Methods From January,2014 to December,2016,32 patients with soft tissue defects of distal thumb were repaired with dorsal thumb neurocutaneous vascular flaps,including left thumbs in 11 cases and right thumbs in 21 cases.They were including 7 cases of nail bed defects,9 cases of pulp defects under nails,16 cases ofthe defects of tips or stump of fingers;skin and soft tissue defects range of 1.5 cm×1.0 cm-3.5 cm×3.2 cm;Flap cutting areas range of 2.0 cm×l.5 cm-4.0 cm×3.5 cm.If the donor areas could be sutured directly,be sutured;if they could not,be covered with intermediate split thickness skin grafts.All patients were followed up when they were reviewed in outpatient department,and to be evaluated the shape,texture,sensation,flexion and extension function,and donor site of the flaps.Results One case of flaps blood circulation disordereddue to tight suture,and eased after the removal of part of the sutures;One case of flaps atrophied,and the phalangette was exposed after 3 months,so we removed the end part of bone and the wound was closed;other flaps were survived,with primary wound healing.In the total 32 patients,they were followed up range of 3 to 36 months,with an average of 12 months.Eighteen cases were followed up at least 6 months,which were 4 of the 7 cases of nail bed defects,5 of the 9 cases of pulp defects under nail and 9 of the 16 cases of the defects of tip or stump of fingers.The appearances and textures of flaps were good,protective sensations were restored,and skin flap two-point discriminationswere 8-10 mm.According to the Trial Standard for Evaluation of Upper Limb Function of Chinese Society of Hand Surgery,it was excellent in 11 cases,good in 17 cases and moderate in 4 cases,with the excellent and good rate of 87.5％.Conclusion It has advantages of simple operation,low risk,high success rate and satisfactory curative effects of the use of dorsal thumb neurocutaneous vascular flap for repair of distal thumb defect of skin and soft tissue.It is not only suitable for the hospital with good technical and equipment,but also suitable for the primary hospital.

Objective To observe the effect of core control training on gross motor function for children with cerebral palsy. Methods 40 cases were divided into 2 groups, 20 cases in each group. The control group accepted comprehensive rehabilitation, and the treatment group accepted core control training in addition. They were assessed with Gross Motor Function Measure (GMFM-88) before and 3 months after treatment. Results The score of GMFM-88 increased in both groups after treatment (P<0.001), and increased more in the treatment group than in the control group (P<0.05). The difference of GMFM-88 score was more in the treatment group than in the control group (P<0.001). Conclusion Core control training can improve gross motor function for the children with cerebral palsy.

Objective: To observe the changes in numbers and degranulation status of local mast cells (MCs) of the complementary acupionts, as well as the concentrations of serum histamine and bradykinin after acupuncture at rat's complementary acupionts of Yanglingquan (GB 34) and Yinlingquan (SP 10), for exploring the mechanisms of the synergistic effect of complementary acupionts. Methods: Using random number table method, 40 Wistar rats were randomly divided into a blank control group (group K), an acupuncture at Yanglingquan (GB 34) group (group A), an acupuncture at Yinlingquan (SP 9) group (group B), an acupuncture at Yanglingquan (GB 34) and Yinlingquan (SP 9) group (group AB), and an acupuncture at points near Yanglingquan (GB 34) and Yinlingquan (SP 9) group (group CD), 8 rats in each group. Group A received acupuncture at Yanglingquan (GB 34); group B received acupuncture at Yinlingquan (SP 9); group AB received acupuncture at Yanglingquan (GB 34) and Yinlingquan (SP 9); group CD received acupuncture at the control points [points 3 mm away from Yanglingquan (GB 34) and Yinlingquan (SP 9) respectively]. Acupuncture was performed at bilateral points in each group. Rats in group K were fixed using the same method as rats in the other 4 groups without acupuncture stimulation. Needles of 0.35 mm in diameter and 40 mm in length were used for acupuncture. Needle handle was connected to the G6805-Ⅱ mode electroacupuncture (EA) device after needling qi was obtained, with sparse-dense wave, frequency of 2 Hz/100 Hz and current of 1 mA to keep the needle handles slightly tremulous while the rats kept quiet. Rats were continuously stimulated by EA for 20 min each time. Experimental interventions were conducted on the 1st, 3rd, 5th and 7th days when the experiment started, for 4 times in total. Specimens from rats in each group were collected 2 h after the 7th day. The levels of histamine and bradykinin in serum were detected by enzyme-linked immunosorbent assay (ELISA). Local tissues of the points were used to prepare cryosections. The changes of MCs were observed after toluidine blue staining. Results: Compared with group K, the numbers and degranulation rates of MCs in group A, group B, group AB and group CD were significantly increased (all P<0.05). The number and degranulation rate of MCs in group AB were significantly higher than those in group A, group B and group CD (all P<0.05). The order of histamine levels from high to low was: group AB >group B > group A > group CD > group K, and the differences were statistically significant (all P<0.05); the levels of bradykinin in group AB, group A and group B were significantly higher than those in group K and group CD (all P<0.05). There was no significant difference in the bradykinin level between group A and group B, nor between group CD and group K (all P>0.05). Conclusion: The number and degranulation rate of MCs of the complementary acupionts are significantly increased after acupuncture at complementary acupionts of Yanglingquan (GB 34) and Yinlingquan (SP 9) of rats, and the serum levels of histamine and bradykinin are increased, which may be one of the mechanisms of the synergism produced by the combination of complementary acupionts.

The paper is aimed to establish a method of residue analysis for thiamethoxam and to study its degradation dynamic and final residue and its standard of safe application of thiamethoxam on Lonicera japonica. Samples extracted with methanol by ultrasonication were purified with dichloromethane by liquid-liquid extraction and SPE column and analysed by HPLC-UV. The results showed that average rate was 84.91%-94.44% and RSD 1.74%-4.96% with addition of thiamethoxam in respectively diverse concentration, which meets inspection requirement of pesticide residue. Two kinds of dosages of thiamethoxam were treated- varying from recommended dosage (90 g x hm(-2)) to high dosage (135 g x hm(-2)), Results of two years test showed that thiamethoxam was degraded more than 90% seven days after application and the half - life period of thiamethoxam was 1.54-1.66 d. The digestion rate of thiamethoxam was fast in the L. japonica. The recommended MRL of thiamethoxam in the L. japonica is 0.1 mg x kg(-1), the dosage of 25% thiamethoxam WDG from 90-135 g x hm(-2) is sprayed less than three times a year on L. japonica and 14 days is proposed for the safety interval of the last pesticide application's and harvest's date.
Agriculture ; methods ; standards ; Chromatography, High Pressure Liquid ; Flowers ; chemistry ; growth & development ; parasitology ; Half-Life ; Insect Control ; methods ; standards ; Insecticides ; adverse effects ; chemistry ; Lonicera ; chemistry ; growth & development ; parasitology ; Neonicotinoids ; Nitro Compounds ; adverse effects ; chemistry ; Oxazines ; adverse effects ; chemistry ; Pesticide Residues ; adverse effects ; chemistry ; Plant Diseases ; parasitology ; prevention & control ; Thiazoles ; adverse effects ; chemistry

Objective To investigate the changes of the expressions of heat shock proteins 70 (HSP70) and insulin and HSP70 protect effect on the gastric mucosa of rats with scald injury, and explore the relationship between insulin and HSP70 . Methods With a model of 30 total body surface area (TBSA) full-thickness burned rats,the expression and distribution of HSP70 in the gastric mucosa was detected with immunohistochemical method and analyzed by a micro-image analysis system, and at the same time the pathological changes of the gastric mucosa tissue of each group were analyzed by Western blot and immunohistochemistry at the 3rd,6th,12th,24th and 48th hour postburn. Results The expression of HSP70 obviously decreased at the 48th hour post scald injury. The expression of HSP70 in the treatment group was significantly higher than that in the scalded group at most time points except the 12th(9.40±1.52,P＝0.065) hour and at equal parallel time［(6.80±1.10,8.60±0.55,10.80±1.64,11.40±1.34),P＜0.05］. The gastric mucosal injury index in the scalded group was significantly higher than that in the treatment group and at equal parallel time ［(4.05±0.36,11.97±1.15,20.98±2.83,13.92±0.94,1.60±0.55),P＜0.05］. In pathological observation, the control group manifested the intact gastric mucosal tissue formation, the scalded group showed obvious gastric mucosal tissue injury in the early phase of scald injury, while the treatment group showed less severe injury than the scald group. A positive correlationwas found in the gastric mucosal injury index and HSP70(r＝0.904,P＜0.01) and also between the serum glucose and HSP70(r＝0.961,P＜0.01).Conclusions Insulin increased the expression of HSP70 and decreased the gastric mucosal injury index in the gastric mucosal tissue of SD rats in the phase of scald injury. It may be one of the vital mechanisms of insulin protecting the gastric mucosal tissue.

AIM:To investigate the effect of Notch-1 knockdown on the growth of dihydroartemisinin-inhibited human osteosarcoma cell line U-2OS.METHODS:U-2OS cells treated with different concentrations of dihydroartemisinin (5, 10, 15 and 20μmol/L) were collected.The expression of Notch-1, MMP-2, MMP-9 and Hes-1 at mRNA and protein levels was measured by real-time PCR and Western blotting, respectively.U-2OS cells were transfected with Notch-1 siRNA for 24 h and incubated with dihydroartemisinin for another 24 h.The cell apoptotic rate , protein expression of MMP-2, MMP-9 and Hes-1, and the migration ability were measured by MTT assay , Western blotting and Transwell experiment , respectively.RESULTS:Dihydroartemisinin (5, 10, 15 and 20 μmol/L) decreased the expression of Notch-1, MMP-2, MMP-9 and Hes-1 at mRNA and protein levels in a dose-dependent manner .Down-regulation of Notch-1 significantly en-hanced the effect of dihydroartemisinin on the cell apoptosis , the protein expression of MMP-2, MMP-9 and Hes-1, and mi-gration ability ( P<0.05 ) .CONCLUSION: Notch-1 pathway is involved in the process of dihydroartemisinin-inhibited U-2OS cell growth.Knockdown of Notch-1 augments the inhibitory effect of dihydroartemisinin on U-2OS cell viability.