Based on M9 culture medium,the concentration of ingredients of culture medium was optimized for the fermentation of pNSR32/BL21(DE3),the engineering bacterial with spider silk protein,and lactose as an inducer.The condition of optimum culture medium was obtained for the expression of the high molecular weight recombinant spider silk protein by using orthogonal and individual factor experimental design.The result was showed that the optimum culture medium was consisted of 0.3% glycerol,3% yeast,0.75% tryptone,0.05%(NH_4)_2SO_4 and a little inorganic salt_.It was confirmed that the optimum culture medium will benefit the growth of bacterial and expression of recombinant spider silk protein.The production level of propose protein will attain at 20% of the total proteins in the fermentation.

Objective To explore the effect of recombinant human vascular endostatin(Endostar,YH-16) on MCF-7 human breast cancer cells in nude mice. Methods Forty nude mice were randomized into four groups and received injection with MCF-7 cells. When gross tumor volume reached 1.0 cm3 ,mice were injected subcutaneously once every two days as following for 20 days: (1) O. 9% NS(0. 2 mg/kg) in negative control group;(2) YH-16(20 mg/kg) in YH-16 group; (3) DDP (1 mg/kg) in positive control group; (4) DDP (1 mg/kg) plus YH-16(20 mg/kg) in DDP plus YH-16 group. Mice were killed by cervical spine disloca-tion. And the body weight, tumor volume, rate of tumor inhibited, VEGF, apoptosis rate of tumor cells and pul-monary metastasis rate were detected. Results The means (SD) of tumor volume in DDP plus YH-16 group,positive control group, YH- 16 group and negative control group were 0. 686 (0. 229), 1. 258 (0. 101), 1. 888 (0. 215), 3. 366 (0. 284) cm3, respectively (P <0. 05) ; the rates of tumor inhibited in the four groups were 92. 1% ,57.3 %, 36. 5 % and 0, respectively (P < 0. 05) ; pulmonary metastasis rates were 0, 10%, 20% and 90% ,respectively(P <0. 05) ;the mean (SD) of apoptosis rates of tumor ceils were 31.6% (2. 7%) ,28. 1%(2. 7%), 19. 4% (2. 9%), 15.7% (3.2%), respectively (P < 0. 05). The mean of absorbance of VEGF in the four groups were 0. 530 ± 0. 164,0. 759 ± 0. 210,1. 063 ± 0. 295,1. 268 ±0. 145 (RT-PCR) and O. 260 ±0. 082,0. 348 ±0. 085,0. 461 ±0. 099,0. 556 ± 0. 113(Western blot) ,respectively(P < 0. 05). Conclusion YH-16 can inhibit MCF-7 breast cancer cell growth and distant metastasis in nude mice with little adverse reac-tion. YH-16 has synergistic effect combined with DDP.

OBJECTIVETo report our therapeutic effect of double adipofascial turnover flaps in repairing stage IV ischial pressure scores.

METHODSDuring the period of May 2009 to February 2013, we treated 11 cases of stage IV ischial pressure scores with double adipofascial turnover flaps and proper drainage. Based on the conditions of pressure scores and abundant blood supply of adipofascial flaps, we designed two adipofascial flaps on each side of lesion. The two flaps were overlaped to cover the pressure score, following with negative pressure drainage.

RESULTSAll pressure scores healed primarily. The follow-up period ranged from 11 to 36 months with satisfactory results and no recurrence.

CONCLUSIONSDouble adipofascial turnover flaps and proper drainage is a safe and simple method for the treatment of stage IV ischial pressure scores with satisfactory results.

Adipose Tissue ; transplantation ; Drainage ; methods ; Fascia ; transplantation ; Female ; Follow-Up Studies ; Humans ; Ischium ; Male ; Negative-Pressure Wound Therapy ; Pressure ; Pressure Ulcer ; pathology ; surgery ; Recurrence ; Surgical Flaps ; blood supply ; transplantation ; Wound Healing

Objective To investigate the activity of attentional and executive cortex and its relationship with cognitive impairment in subcortical ischemic vascular dementia (SIVD).MethodsTwenty patients with SIVD and twenty normal control subjects who were matched by age,sex and education were enrolled.All of them underwent fMRI using SEMENTS 3.0T MR during Stroop task performance. The correlation between cognitive impairment and cortex activation in fMRI was analyzed.Results Cortical activation of bilateral dorsolateral prefrontal cortex,Nentrolateral prefrontal cortex,inferior parietal lobe have closed correlation with total score,visual trabecular spaces and execution,attention,verbalization,delayed memory and orientation score in MoCA test ( r =0.447-0.837,P ＜ 0.05 ).ConclusionsCortex activation in fMRI can reflex the cognitive impairment of SIVD.

ObjectiveTo discuss the clinical efficacy of distal medial arm perforator flaps.MethodsAccording to the basic anatomy of distal medial arm perforator flaps,the distal medial arm perforator flaps were designed for repairing skin defects around elbow joints and at upper part of forearms in 15 cases.ResultsAll flaps were survived and first intention of wounds was obtained.At 3-36 months of follow-up,flap shape and elbow joint function revealed satisfactory recovery.Conclusions With the constant anatomical position,good blood supply,safe surgical approaches and cryptic donor site,the distal medial arm perforator flap is an alternative to repair the skin defects around elbow joints and in proximal forearms.

Objective To investigate and evaluate the clinical effect of the direct popliteal artery perforator flap.Methods Thirty embalmed lower limbs of adult cadavers which perfused with red latex were used to dissection,major observations were the origin,perforators and anastomoses regulations of the direct popliteal artery.Based on the anatomical study,direct popliteal artery perforator flaps were designed and used clinically to 7 patients who had soft tissue defects in popliteal fossa.Results The direct popliteal artery perforator was direct started from lateral wall of the superior segment of popliteal artery,and about 7-11 cm above knee joint.Then it goes up along the middle line of posterior region of thigh,and pierced from the carvity between semitendinosus and biceps femoris and gave off several branches in superficial fascia.Finally,these branches anastomoses with many perforating branches which were gave off form deep femoral artery (the 1st to 3rd perforator artery),obturator artery and lateral circumflex femoral artery.Clinically,all flaps were survived eventually,and 6 of them were healed quickly,only 1 case needed to change dressings to healed its partial necrosis for the pedicle had too much soft tissues and too swelling to block its blood supply.After 2-12 months of following-up,the colors and appearances of these flaps were excellent,and the function of knees were nearly normal.Conclusion Direct popliteal artery perforator flap has relatively constant location and sufficient blood supply to use in clinical application,it is safe and easy to use for recovering soft tissue defects in popliteal fossa.

A design scheme of a tele-screening system for diabetic retinopathy (DR) has been proposed, especially the communication subsystem. The scheme uses serial communication module consisting of ARM 7 microcontroller and relays to connect remote computer and fundus camera, and also uses C++ programming language based on MFC to design the communication software consisting of therapy and diagnostic information module, video/audio surveillance module and fundus camera control module. The scheme possesses universal property in some remote medical treatment systems which are similar to the system.
Computers ; Diabetic Retinopathy ; diagnosis ; Humans ; Programming Languages ; Telemedicine ; instrumentation

Bicuspid ; Dental Pulp Cavity ; pathology ; Humans ; Mandible ; Root Canal Therapy

Objective To provide anatomical basis for lateral antebrachial neurocutaneous flap pedi-cled with inferior cubital artery perforator in repairing tissue defects around elbow joint. Methods Thirty embalmed upper limbs of adult cadavers perfused with red latex were used for this study, and followings were observed:①The course and distribution of lateral antebrachial cutaneous nerve; ②Anastomoses between inferior cubital artery and nutrient vessels of lateral antebrachial cutaneous nerve. Mimic operation was performed on other side of fresh specimen. Results ①The main trunk of lateral antebrachial cutaneous nerve (LACN) lined in the radial forearm and distributed in the 1/3 region of lateral forearm. ①The nutritional vessels of the flap were plurisegmental and polyphyletic. The inferior cubital artery which was relatively constant reached to skin through "V"-shaped peak formed by communicating branches of cephalic vein and deep venous system. They also gave off large number of small veins, which closely aligned with perineural branches and neural stem vascular chain of lateral antebrachial cutaneous nerve. Conclusion The lateral antebrachial neurocutaneos flap pedicled with inferior cubital artery perforator can be formed to repaire tissue defects around elbow joint.

Objective To study the chemical constituents of Helicia nilagirica. Methods The ethanol extract was seperated by petroleum ether, dichloromethane, and n-butanol in sequence, then isolated by silica gel column chromatography. The structures were identified and elucidated by physicochemical pro-(perties) and spectral analysis. Results Four compounds were isolated from the petroleum ether extract and identified as n-hexadecane acid (Ⅰ), ?-sitosterol (Ⅱ), ?-sitosterol-3-O-?-D-glucoside-6′-acetate (Ⅲ), and daucosterol (Ⅳ). Conclusion All the compounds are isolated from the plant for the first time. Compounds Ⅰ, Ⅲ, Ⅳ are isolated from the plants of Helicia Lour. for the first time, and compound Ⅲ is a new natural product.