β?carbonic anhydrases(β?CAs)are ubiquitous metalloenzymes which active site contains a zinc ion(Zn2+),and they could catalyze the hydration of carbon dioxide to bicarbonate and protons efficiently and are involved in many biological pro?cesses,such as respiration,pH and CO2 homeostasis,biosynthetic reactions,virulence regulation and so on,and may play a critical role in the life activity of many organisms which contain these enzymes. β?CAs are widely distributed in fungi,bacteria, algae,plants and a small number of protozoan and metazoan except vertebrates. Therefore,as potential drug targets for design?ing and developing antibacterial and anti?parasitic drugs,β?CAs promise a broad application prospect. This paper focuses on the distribution,physiological function and the progress of researches on β?CAs in parasites and their vectors.

Objective To investigate the safety and clinical prognosis of breast conserving operation in treat-ment of triple negative breast cancer.Methods 157 patients with breast cancer were divided into the non triple nega-tive breast cancer group (n=76) and triple negative breast cancer (n=81) according to its receptor expression,clin-ical pathological features, local recurrence after 5 years.Distant metastasis and survival situation were compared between two groups.Results The age<35 years patients of triple negative group accounted 17.3%,significantly higher than 7.9%of the non triple negative group(χ2 =5.331,P<0.05);the size of tumor≥5cm of triple negative group accounted 79.0%,significantly higher than 59.2% of the non triple negative group(χ2 =7.022,P<0.05);The patients with positive family history and lymph nodes of the triple negative group were 9.9%and 28.4%,signifi-cantly higher than 2.6%and 17.1%of non triple negative group,the difference between the two groups was statisti-cally significant (χ2 =6.283,4.865,all P<0.05);The local recurrence,distant metastasis rate and 5 year survival rates between the two group were not significantly different(χ2 =2.559,2.829,2.361,all P>0.05);The 5 year dis-ease free survival rate of the triple negative group was 80.25%,significantly lower than 94.74%of the non triple neg-ative group (χ2 =6.572,P<0.05).Conclusion The patients with triple negative breast cancer is younger,their tumor size is large and has a high proportion of family history.Their recurrence rate,distant metastasis rate and 5 year overall survival rate are as better as the patients with non triple negative breast cancer after breast preservation opera-tion,which has high security and good clinical application value.

Objective To assess the value of color Doppler flow imaging (CDFI) in indicating the recurrence and prognosis of liver cancer.Methods Two hundred and eighty-seven patients with primary liver cancer were enrolled,thirty-seven cases received operations ( 12.9% ).The size,profile,margin,echogen,blood supply of the tumors were observed preoperatively by CDFI. Twenty-eight patients were followed for 0.5 to 5 years.Results Recurrent nodules were seen in 24 cases (85.7%) during five years.Lesions larger than 5 cm recurred much earlier than those less than 5 cm in the diameter of the patients( P

BACKGROUND:In 2001, Zuk et al found adipose-derived stem cels (ASCs) from the aspirate of liposuction for the first time, which launched a new era of stem cel research. In recent years, stem cels have been proved to widely exist in many tissues and organs. ASCs are always in the spotlight of plastic and reconstructive surgery, tissue engineering and regenerative medicine because of extensive sources and simple isolation.
OBJECTIVE: To review the fat tissue harvesting and ASCs isolation, purification, expansion, and cryopreservation, to discuss the main factors which influence the yield, proliferation capacity and differentiation potential of ASCs, and to predict the future research interests based on current issues.
METHODS:On September 10th, 2015, relevant articles were searched in PubMed using the folowing format: (adipose stem cels[Title]) OR (adipose-derived stem cels[Title]) OR (adipose-derived mesenchymal stem cels[Title]) and in SinoMed using the folowing format in Chinese: (“adipose-derived stem cels” [Title])or(“adipose-derived mesenchymal stem cels”[Title]). Finaly, 81 representative articles were included according to their titles and abstracts. In this review, we also introduced relevant experience about the aforementioned procedures from the Department of Plastic Surgery and Tissue Regeneration and Molecular Cel Engineering Lab of University of Texas, MD Anderson Cancer Center, USA.
RESULTS AND CONCLUSION:The widely dispersed fat tissues potentialy provide abundant stem cels for tissue engineering and regenerative medicine. Liposuction is a mini-invasive approach for harvesting fat tissues. Colagenase digestion is the major method for ASCs isolation due to its simplicity and high yield in basic research. However, clinical fat transplantation without ASCs isolation or non-colagenase isolation of stromal vascular fraction or ASCs is preferred. The phenotype, proliferation and differentiation capacity of ASCs may be affected by several factors during the fat tissue harvesting and ASCs isolation. Therefore, a standard protocol for ASCs isolation is needed.

Objective To compare efficacy, time consumed and complications among cricothyroid membrane puncture guided tracheostomy ( CMPGT ) , surgical tracheostomy ( ST ) , surgical cricothyroidotomy ( SC) , and percutaneous tracheostomy using Griggs'guide wire dilating forceps ( GWDF) for the establishment of airway in urgent need of medical attention.Methods Twenty miniature swine were randomly ( random number) divided into four groups.The procedures of CMPGT, ST, SC and GWDF were carried out when patients'SpO2 ( oxygen saturation of blood ) declined to 80% by suspension of oxygen supply after general anesthesia. Procedure performed time, ventilation resumed time, SpO2 and electrocardiograph ( ECG) and arterial blood gases ( ABG) analysis including SaO2 , PaO2 , PaCO2 , blood pH, and heart rate, blood pressure were recorded.Fiberoptic bronchoscope was used to assess any damage to the tracheal wall.Complications were noted and scored in a two-month follow-up period.Results Airways were successfully established in all swine.The times consumed for SC, GWDF, CMPGT, and ST were (86 ±12) s, (165 ±63) s, (174 ±34) s, and (519 ±128) s, respectively, however a shorter time for ventilation resumed was found in CMPGT procedure (23 ±4) s, P<0.01.ECG showed that SpO2 and T-wave decreased and Q-T shortened after oxygen suspension and recovered to normal level rapidly after ventilation.There were significant differences in ECG and ABG between pre-and post-operative periods ( P<0.05) in all groups.Minimal intra-operative bleeding was found in two swine of each group.In ST group, moderate intra-operative bleeding was encountered in three swine.Three pigs were suffered from hypotension owing to prolonged hypoxemia.There was minimal postoperative bleeding occurred in one swine, thus leading to stoma infection.In SC group, moderate intra-operative bleeding was noticed in one swine. One miniature swine had slight injury at laryngeal cartilage resulting in difficult decannulation happened in one swine.and moderate tracheal wall injury occurred in one swine of GWDF group.The complication scores of CMPGT, GWDF, SC and ST were 3, 5, 9, and 19, respectively.Conclusions A shorter time for ventilation resumed with fewer complications was found in the procedure of CMPGT than that in the other methods.This animal study suggested that CMPGT was a time-saving and secure technique for emergency surgical airway establishment which has been practiced in human being as well.Key words:Surgical airway establishment, Cricothyroidotomy, Tracheostomy, Percutaneous dilational tracheostomy.

Objective To investigate the effect of iodine-125 seed implantation in the treatment of unresectable pancreatic carcinoma.Methods A total of 26 pancreatic carcinoma patients were retrospectively analyzed.Patients undergoing palliative operation in combination with iodine-125 seed implantation.jundice recovery,objective tumor response,pain relieved,clinical benefit response,median survival time and complication were investigated.Results Half of cases with jundice has reduced and totally normal in 3 weeks.Abdominal pain was relieved in 94.7％ patients,average recovery duration was (5.0 ± 1.5) d.18 cases had gastroenterol function disorder (69.2％),gastroparesis in six cases (23％) and average recover time was (16 ± 5.1) d.24 of 26 cases were follow up study,median survival time was (12 ± 5.1) months,objective tumor response was smaller than preoperation in 9,no change in 10 and 5 cases became larger than before.Conclusions Palliative operation in combination with iodine-125 seed implantation is safe and effective in the treatment of unresectable pancreatic carcinoma.

Anaerobic ammonium oxidation (ANAMMOX), as its essential advantages of high efficiency and low cost, is a promising novel biological nitrogen elimination process with attractive application prospects. Over the past two decades, many processes based on the ANAMMOX reaction have been continuously studied and applied to practical engineering, with the perspective of reaching 100 full-scale installations in operation worldwide by 2014. Our review summarizes various forms of ANAMMOX processes, including partial nitritation-ANAMMOX, completely autotrophic nitrogen removal over nitrite, oxygen limited autotrophic nitrification and denitrification, denitrifying ammonium oxidation, aerobic deammonification, simultaneous partial nitrification, ANAMMOX and denitrification, single-stage nitrogen removal using ANAMMOX and partial nitritation. We also compare the operating conditions for one-stage and two-stage processes and summarize the obstacles and countermeasures in engineering application of ANAMMOX systems, such as moving bed biofilm reactor, sequencing batch reactor and granular sludge reactor. Finally, we discuss the future research and application direction, which should focus on the optimization of operating conditions and applicability of the process to the actual wastewater, especially on automated control and the impact of special wastewater composition on process performance.
Ammonia ; chemistry ; Bioreactors ; Denitrification ; Nitrification ; Nitrites ; chemistry ; Nitrogen ; chemistry ; Oxygen ; chemistry ; Sewage ; chemistry ; Waste Disposal, Fluid ; methods ; Waste Water ; chemistry

Objective To evaluate regional blood flow occlusion (RBFO) in hepatectomy for liver neoplasms. Methods In this study, hepatic tumors were resected under RBFO in 28 cases (RBFO group), and under Springle's technique (control group) in 24 cases. The Child-Pugh classifications of liver function were grade A in all patients. The ligature ribbon was put in liver parenchyma around tumor to block the blood supply before resecting the tumor under guiding of B sounography in RBFO group. Anesthesia time, blood loss and transfusion, hospitalization, change of liver function and complications were compared between the two groups. Results Blood loss, anesthesia time and postoperative hospital stay were (340±92) ml, (98.4±25.0) min, ( 10.2±2.3 ) d in RBFO group and (620±124) ml, ( 135.8±47.5 ) min, (16.5±5.1 ) d, respectively, in control group, differences were all significant between the two groups (P <0.01, t = 9.222,9.328 and 5.875, respectively). On post-op day 2, ALT (U/L) was (378.4±35.2) vs. (539.2±115.4) (t=7.012, P<0.01), TBIL (37.5±11.2) vs. (51.8±29) mmol/L(t=8.818, P<0.01),PT (17.4±2.4) vs. (20.4±2.8) see(t =4.16, P<0.01) in RBFO group and control group, respectively. ALT was (57.1±15.5) vs. (98.1±21.2) U/L(t =8.039),TBIL (25.4±4) vs. (46.3±13) mmol/L(t=8.085),PT (13.2±4.2) vs. (15.7±2.2) see (t=2.621)on post-op day 7 respectively, again the differences were all significant between the two groups (all P<0.01). Conclusion Regional blood flow occlusion is an effective technique to control blood loss during hepatectomy for liver neoplasms.

Objective To investigate the value of dynamic contrast-enhanced MRI parameters in the diagnosis of cervical squamous cell carcinoma. Methods A retrospective analysis of dynamic contrast enhanced MRI in 55 patients with pathologically diagnosed cervical squamous cell carcinoma without prior treatment. They were divided into three groups based on grade of differentiation: well differentiated ( 6 patients),moderately differentiated(28 patients)and poorly differentiated group(21 patients). Capacity volume transfer constant (Ktrans),exchange rate constant(Kep) and extravascular extracellular volume fraction (Ve) were measured in each group of patients, and comparing the correlation with ANOVA, DCE-MRI parameters and grading of squamous differentiation using Spearman rank correlation analysis. Results Ktrans of the poorly, moderately and well differentiated cervical squamous cell carcinoma were (2.42±0.58),(1.71± 0.78),(1.27±0.78)/min respectively, Kep were (4.17±1.23),(3.08±1.58),(2.55±0.87)/min respectively, Ve were 0.60 ± 0.12,0.60 ± 0.19,0.43 ± 0.17 respectively. Statistical difference of Ktransand Kep were found among the subgroups of different pathological grading.(F values were 7.518 and 4.234,P all<0.05), Ve difference was not statistically significant (F=2.382, P>0.05). Statistical difference of Ktransand Kep were seen in multiple comparisons, between the groups of poorly and moderately differentiated groups poorly and well differentiated groups (P all<0.05),difference was not statistically significant of Ktransand Kep were seen in the groups of moderately and well differentiated groups(P> 0.05). There were moderate negative correlation between Ktrans,Kep and the pathological degree (r=-0.531 and -0.446, P=0.001 and 0.002), Ve had no correlation between pathological grade (r= -0.220, P = 0.141).Conclusion DCE-MRI parameters Ktrans and Kep reveal perfusion characteristics in different pathological grades of cervical squamous cell carcinoma.

Objective Gambogic acid ( GA) can suppress the growth of multiple tumor cells , including gastric carcinoma , hepatoma , hematologic neoplasms and breast carcinoma , but there have been few reports about its effect on urologic neoplasms .This study was to investigate the possible mechanisms of GA inducing bladder cancer cell apoptosis and cell cycle arrest . Methods We cultured human bladder cancer BIU8-7 cell lines in vitor and treated the cells in the logarithmic growth phase with isotonic saline solu-tion (negative control)or GA at the concentrations of 1.0, 2.0, and 3.0μmol/L, respectively.We determined the expression of the Caspase-3 protein in the tumor tissue using the immunohistochemical S-P method and detected GA-induced apoptosis of the bladder cancer cells and cell cycle changes by flow cytometry . Results The expressions of the Caspase-3 protein were 4.28 ±1.86, 5.03 ± 0.78, and 6.47 ±1.31 in the 1.0, 2.0, and 3.0μmol/L GA groups, respectively, significantly higher than 2.13 ±1.27 in the nega-tive control (P<0.05).Flow cytometry showed a gradual decrease of the cells in the G 0/G1 phase and a gradual increase in the G2/M phase , but no obvious change in the S phase . Conclusion Gambogic acid can promote the apoptosis , arrest the cell cycle , and in-hibit the proliferation of bladder cancer cells by increasing the expression of the Caspase -3 protein.