The aim of synthetic biology is to design artificial life systems. Such system is hoped to create a better production process with desired ability for bioproduction, biotransformation, adaption and environmental monitoring. However, to design a life system involves understanding the cellular regulation networks at multiple levels, in which the controls of protein level, subcelluar location, and activity are especially critical. Thus tuning protein expression has become essential tools in synthetic biology studies, such as part design, module assembly and compatibility optimization. Protein budget, just like budget for a factory, can be thought as the cost estimating criteria for an artificial cell factory. Protein budget control has provided a powerful optimization strategy for synthetic biology.
Artificial Cells ; metabolism ; Metabolic Engineering ; Metabolic Networks and Pathways ; genetics ; Protein Engineering ; Proteins ; economics ; metabolism ; Recombinant Proteins ; biosynthesis ; genetics ; Synthetic Biology ; economics

Objective To study the residual gallbladder stones and the relationship between the onset of acute pancreatitis and its surgical treatment.Methods Retrospective analysis was made in 13 patients with residual gallbladder admitted tO the hospital from June 1998 to December 2007,of which 8 cases of residual gallbladder stones and acute pancreatitis were invostigated.Thirteen cases of patients had underovent cholecystectomy 2 to 9 years before,the first symptoms occurred before 1 month to 8 years.Other remnants of the gallbladder were diagnosed by B-ultrasound and CT,magnetic resonance cholangiopancreatography (MRCP).Results Two cases were confirmedas pigment stones;6 cases as cholesterol stones(size0.2 cm ～0.5 cm,an average of 3.2 cm);1 cases as anonlalous pancre-aticobiliary junction(anomalous pancreaticobiliary ductal union,APBDU);5 cases as anomal;8 cases(61.5%)as episode of acute pancreatitis.Au patients underwent resection of residual gallbladder,with line choledochal cyst excision and biliary-enteric Roux-en-Y internal drainage in 1 case.choledocholithotomy T-tube drainage in 3 cases.Postoperative follow-up of residual gallstone was done in 8 cases,no pancreatitis attack in 6 cases,pancreatitis attack in 2 cases.Significant difference was found in onset of acute pancreatitis (P=0.019,P<0.05).Five patients without stones in patients with postoperative all none pancreatitis attack.Conclusion Patients with residual gallbladder stones are prone to acute pancreatitis,and cholecystectomy for patients with residual treatment Can reduce the pancreatitis attack.

Autoimmune pancreatitis is a chronic autoimmune-related pancreatitis.It is characterized by a high globulin, IgG~4 increased, anti-carbonic anhydrase antibody and anti-lactoferrin antibodies exist, diffuse swelling of the pancreas, a significant lymphocyte infiltration accompanied by fibrosis, multiple clinical manifestations , and sensitive to the hormone treatment.

BACKGROUND:Titanium materials have high mechanical strength, stable physical properties, good biocompatibility, and excelent corrosion resistance, which can be safely used in humans. OBJECTIVE:To compare the safety of mesh-like titanium aloy steel plateversus wire mesh in the repair of chest wal defects. METHODS:Eighteen patients with chest wal defects, 11 males and 7 females, with an age range of 19-65 years, were enroled. The 9 of 18 patients were subjected to repair with mesh-like titanium aloy steel plate, and the other 9 patients underwent wire mesh repair. At 1 week after repair, visual analog scale scores were measured in the two groups, and patient’s satisfaction on the thoracic appearance and incidence of complications were surveyed during the folow-up. RESULTS AND CONCLUSION: Al patients were folowed up for 1-7 years. During the folow-up, X-ray review displayed good thoracic stability and no fracture of titanium plate and wire mesh. Patients recovered wel from respiratory dysfunction, with unapparent chest wal deformity and high satisfaction rate of the thoracic appearance. Moreover, compared with the wire mesh group, the satisfaction rate of the thoracic appearance was significantly higher (P< 0.05), but the incidence of complications was significantly lower in the titanium plate group (P < 0.05). At 1 week after repair, the visual analog scale scores had no difference between the two groups (P> 0.05). These findings indicate that the mesh-like titanium plate has good biocompatibility and safety to effectively maintain the stability of the chest wal.

0.05).Patients in both group had accepted PCI successfully.The ratio of patients achieved TMPGⅡor TMPG Ⅲ after PCI was significant higher that in the early group(P

Objective: To study 24-hour blood pressure variability (BPV) in essential hypertensives(EH) and to observe the effects of enalapril on BPV in the patients. Methods: BPV were evaluated in 132 EH patients (EH Ⅰ-Ⅱ group 90, EH Ⅲ group 42) using ambulatory blood pressure monitoring, and compared with 60 normal controls.45 EH Ⅰ-Ⅱ patients were treated with enalapril for 4 weeks by randomized single-blind study.The BPV were measured before and after treatment. Results: The SBPV and MAPV during 24-hour period, daytime or nighttime were significantly higher both EH Ⅰ-Ⅱ and EH Ⅲ than control group ( P 0.05).Conclusion:There was a significant increase in BPV(especially in SBPV) and in particular EH Ⅲ group than control group There was no effect in BPV with EH Ⅰ-Ⅱ group by enalapril treatment for 4 weeks.

Acute Coronary Syndrome ; therapy ; Angioplasty, Balloon, Coronary ; Humans

Objective To analysisthe evaluation clinical effects and complications of retrograde peroneal artery perforators and retrograde posterior tibial artery fascia pedicle flap perforators fascia pedicle flap for the re-pair of the leg and foot skin defect effect. Methods In January 2010 to January 2015,patients with leg and foot skin defect effect in our hospital administrated withperoneal artery perforators and retrograde posterior tibial artery fascia pedicle flap perforators fascia pedicle skin flap were retrospectively analyzed.Flap survival,necrosis rate, the function of the skin flap and complications were analyzed. Results The one stage flap survival rate of peroneal artery group(84.6%)is higher than the posterior tibial artery group(57.69%),the difference was statistically sig-nificant(P < 0.05). There were no significant difference between the flap function index(pain,activity limita-tion,wearing shoes,functional recovery satisfaction)score and posterior tibial artery group(P>0.05). The occur-rence of hyperplastic scar,itching,pigmentation,skin graft,numbness,skin graft abnormal pain complication rates inperoneal artery group were significantly lower than the posterior tibial artery ,and the difference was statisti-cally significance(P < 0.05). Conclusion Retrograde peroneal artery perforators and retrograde posterior tibial artery fascia pedicle flap perforators fascia pedicle flap can effectively repair skin and soft tissue defect ,retrograde peroneal artery perforators shows with higher survival rate and less complication.

AIM: To investigate the effect of intravitreal injection of anti-vascular endothelial growth factor (VEGF) drug Bevacizumab on connective tissue growth factor(CTGF) and pigment epithelium derived factor (PEDF) in proliferative membranes in patients with proliferative diabetic retinopathy (PDR).METHODS: From January 2015 to December 2016, 117 patients (126 eyes) with PDR were analyzed using the case-control study.The selected cases were randomly divided into two groups, respectively, Group A of 60 cases (63 eyes) and Group B of 57 cases (63 eyes).The Group A was treated with vitrectomy alone, while the Group B received intravitreal injection of 0.05mL/1.25mg bevacizumab before vitrectomy.The peeled epiretinal membranes in patients were stained and then the histopathological changes were observed for primitive cells and angiogenesis, the expression of CTGF and PEDF were tested.RESULTS: The expression of CTGF and PEDF in the proliferative membrane of the two groups were expressed in the cytoplasm.The Group A showed positive expression in 38 cases, the positive rate was 60.3%.Compared with Group A, the positive expression rate of CTGF in Group B (92.1%) was significantly higher (P<0.05).The positive expression rates of PEDF in the two groups were 90.5% and 95.2% respectively, and there was no significant difference between the two groups (P>0.05).CONCLUSION: In patients with PDR after intravitreal injection of bevacizumab, the retinal neovascularization is significantly reduced, which is conducive to vitrectomy.The positive expression rate of CTGF significantly increased in patients with PDR after intravitreal injection of bevacizumab, but there was no significant change in the expression of PEDF in the anterior membrane.

AIM: To study the effect of intravitreal injection of anti-vascular endothelial growth factor (VEGF) on best corrected visual acuity (BCVA) and multifocal-electroretinogram (mfERG) before and after treatment for choroidal neovascular disease.METHODS: A total of 264 patients (332 eyes) with macular neovascularization (MCNV) and idiopathic choroidal neovascular disease (ICNV) who underwent pathologic myopia from January 2015 to January 2017 were enrolled in this study.Intraocular pressure and BCVA, fundus using 90D front mirror and slit lamp detection, and the fundus photograph, OCT, ICGA and FFA angiography, mfERG detection were taken.One month after the drug, 1mo after the final treatment, we recorded BCVA, intraocular pressure and mfERG and so on.RESULTS: Ranibizumab was injected into the 254 eyes, and 78 eyes were injected with conbercept.There were 37 eyes injected once, 147 eyes were injected twice, 72 eyes were injected 3 times, 57 eyes were injected 4 times, 19 eyes 5 times.There were no significant differences on intraocular pressure between the two groups (P>0.05).The BCVA before treatment was significantly different compared with those 1mo after treatment and 1mo after the final treatment (P>0.05).The amplitude of Ring1, Ring2 and Ring4 increased after treatment, the difference was statistically significant.(P<0.05).The amplitude of Ring3 and Ring5 increased at 1mo after final treatment(P<0.05).CONCLUSION:Intravitreal injection of anti-VEGF drugs has a significant effect on BCVA and mf ERG in patients with choroidal neovascular disease and is safe.