The concentration of precursors for the production of taxol with Fusarium mairei K178 was optimized by response surface methodology.Firstly,Plackett-Burman design was undertaken to evaluate the effects of eight factors.With statistic regression analysis,the significant factors affecting taxol production were determined as follows: phenylalanine,sodium acetate and sodium benzoate.Box-Behnken design was used to optimize the three critical internal factors mentioned above,and the optimum concentration levels and the relationships among these factors was found out.By quadratic regression model equation with Design-Expert statistic methods,the optimal concentration of the variables were determined as: phenylalanine 2.8mg/L,sodium acetate 3.3g/L,sodium benzoate 31.8mg/L.Under such conditions,the taxol production was increased to 242.6?g/L,which was 15.6% higher than the maximum value in the single factor tests.The experiment values under the optimal conditions agreed with the predicted values,which indicated that the model was proper and effective.

Acute Kidney Injury ; chemically induced ; enzymology ; Animals ; Disease Models, Animal ; Gentamicins ; Peptidyl-Dipeptidase A ; metabolism ; Rats

Animals ; Antineoplastic Agents ; administration & dosage ; Delayed-Action Preparations ; administration & dosage ; Drug Carriers ; chemistry ; Drug Delivery Systems ; Growth Hormone-Releasing Hormone ; administration & dosage ; Nanotechnology ; Research

OBJECTIVE: To estimate the application of prognosis evaluation of ulnar nerve injury by 1H-magnetic resonance spectroscopy (1H-MRS). METHODS: The metabolites of first dorsal interossei (FDI) of two hands from 12 healthy volunteers and 1 volunteer with complete ulnar nerve injury were detected by 1H-MRS and the data were statistically analyzed. RESULTS: For the FDI of healthy adults, the female peaks area of extra-myocellular lipids (EMCL) was higher than the male (P < 0.05); There was no significant difference in Cho, Cr and intra-myocellular lipids (IMCL) between male and female (P > 0.05); There was no significant difference in all the peaks area between the left and right hand (P > 0.05). The EMCL peak of the injury side was higher than that of the healthy side, and the area of FDI was reduced in the volunteer with ulnar nerve injury. CONCLUSION Noninvasive and quantitative detection of 1H-MRS may be valuable for prognosis evaluation of peripheral nerve injury.
Adult ; Female ; Humans ; Male ; Peripheral Nerve Injuries/diagnosis* ; Prognosis ; Proton Magnetic Resonance Spectroscopy/methods* ; Sex Distribution ; Ulnar Nerve/metabolism*

The DNA structures could be altered or even damaged by exogeous or endogenous factors during cell proliferation. Failure of effective and timely repair will lead to cell cycle arrest or apoptosis. By taking the advantage of the quick proliferation of cancer cells, DNA damage induction, cell cycle arrest and apoptosis promotion have become important strategies for ant-cancer chemotherapy. Previous reports showed that an array of natural compounds inhibit cancer cell proliferation by inducing DNA damage, which have therapeutic potentials for anti-cancer drug research and development.
Animals ; Biological Products ; pharmacology ; therapeutic use ; DNA Damage ; Drugs, Chinese Herbal ; therapeutic use ; Humans ; Neoplasms ; drug therapy

Objective To predict the severity of acute pancreatitis by detecting the changes of microRNA in the serum,and whether paracentesis catheter drainage (PCD) should be applied to the patients.Methods The peripheral blood of 120 patients with acute pancreatitis who were admitted to the General Hospital of Chengdu Military Command from October 2013 to March 2014 were collected.Thirty-five patients with severe acute pancreatitis (SAP) or moderately severe acute pancreatitis (MSAP) were in the group A,and 85 patients with mild acute pancreatitis (MAP) were in the group B.The scores of the acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ),RANSON and bedside index for severity in acute pancreatitis (BISAP) were assessed.The expressions of the miR-146a,miR-10b,miR-21 and miR-26a in the serum were detected by the real-time quantitative PCR.The differences in the expressions of the 4 kinds of microRNAs in the 2 groups were compared,and the correlation between the 3 exaluation system was analyzed.Factors influencing the timing of the PCD for the PCD patients were analyzed.The measurement data were analyzed using the t test,and the relationship between the variables was analyzed using the linear correlation analysis or the rank correlation analysis.Univariate or multivariate analysis was done by the Logistic regression analysis.Results (1) The scores of the APACHE Ⅱ,RANSON and BISAP were 8.28 ±0.61,3.42 ±0.54 and 1.71 ±0.32 in the group A,and 3.18 ±0.52,1.43 ±0.25 and 0.37 ±0.06 in the group B,with significant differences between the 2 groups (t =4.266,7.809,4.113,P ＜ 0.05).(2) The expressions of the miR-146a,miR-10b,miR-21 and miR-26a were 1.41 ± 0.21,2.94 ± 0.49,1.62 ± 0.25,1.21 ± 0.20 in the group A,and 6.29 ± 0.91,0.52 ± 0.09,2.82 ± 0.33 and 3.57 ± 0.64 in the group B.There were significant differences in the expression of the miR-146a and miR-10b between the 2 groups (t＝-2.156,2.110,P ＜0.05),while no significant difference in the miR-21,miR-26a was detected between the 2 groups (t =-1.114,-1.571,P ＞ 0.05).(3) There was correlation between the expressions of the miR-146a,miR-10b and the APACHE Ⅱ,RANSON,BISAP in the group A (r =-0.826,0.837,-0.874,0.866,-0.833,0.899,P ＜ 0.05),while no correlation was detected between the expressions of the miR-21,miR-26a and the 3 exaluation systems in the group A (r =0.642,0.321,0.701,0.750,0.716,0.716,P ＞ 0.05).There was no significant difference between the miR-146a,miR-10b,miR-21,miR-26a and the APACHE Ⅱ (r =0.067,0.347,0.133,0.111,P＞0.05),RANSON (r=0.178,0.078,0.092,0.142,P ＞0.05) and BISAP (r =0.103,0.260,0.216,0.285,P ＞ 0.05) in the group B.(4) The results of univariate analysis showed that miR-10b,RANSON and BISAP were the factors influencing the timing of PCD (OR =4.170,5.612,2.500,95 ％ confidence interval:1.092-15.932,1.232-21.622,1.190-5.254,P ＜ 0.05).The results of multivariate analysis showed that miR-10b was the factor influencing the timing of PCD (OR =2.374,95％ confidence interval:1.115-5.056,P ＜ 0.05).Conclusions miR-10b and miR-146a might be the predictors of severity of severe acute pancreatitis; miR-10b might be the indicator in judging whether PCD should be applied.

Objective To evaluate the short and long term efficacy of self-expandable metallic stent implantation through bronchoscope in the management of the patients with malignant airway stenosis.Methods Seventy-four hospitalized patients with malignant airway stenosis during a 10-year period were selected as our subjects from Dec.2002 to Nov.2012 in the Respiratory Department of the Central Hospital of Wuhan.All these patients underwent bronchoscope for nitinol self-expandable metallic stent implantation.Clinical improvement,6min walking distance (6MWT),mMRC index,arterial blood gas,as well as early and late postoperative complications were investigated.Results A total of 77 stents were implanted,including 34 covered metallic stents and 43 uncovered metallic stents.All patients showed the obvious relief of dyspnea after the operation.6MWT at pre-operation was (172 ± 45)m and (288 ± 36)m at 28 week post-operation.Arterial blood gas was (61.34 ±6.44)mmHg at pre-opemtion and (72.12 ±6.87) mmHg at 28 week post-operation.mMRC was 3.56 ± 0.44 at pre-operation and 1.96 ± 0.37 at 28 week post-operation.All these differences were significant(P ＜ 0.01).The operation succeeded in releasing bucking of patients with esophago-tracheal fistula.Symptoms such as fever,cough,pharyngodynia,foreign body sensation and hemoptysis were observed,and all the above side effect could be solved while no serious complications arose.Conclusion Bronchoscopic insertion of metallic airway stents for malignant airway stenosis is a safe and effective procedure that could obviously relieve respiratory distress and improve the quality of life.

Objective To investigate the distribution of high-arsenic drinking water in Honghu city of Hubei province in order to provide a scientific basis for prevention and control of endemic arsenic disease.Methods Investigations were made in 22 townships(towns,districts),68 natural villages of the drainage areas of the Dongjing River,the Neijing River and the Yangtse River in 2006 and 2007,with the townships(towns,districts)around Shahu town in Xiantao city as the focal point.1000 water samples were drawn each year,which was 10% of all the wells in every natural village.Using sampling investigation,water arsenic Was determined by half-quantitative fast reagent kit.All samples of water with arsenic exceeding the standard(≥0.03 mg/L)were re-determined according to state standard.Surveys on the disease was carried out in the villages(brigades)where arsenic exceeded the standard.Results A total of 2000 samples were surveyed from 68 natural villages,of which there were 401 samples from 48 villages exceeding the standard in a rate of 20.05%(401/2000).The highest arsenic content Was 0.71 mg/L.The high arsenic water sources were distributed mainy in the drainage areas of the Dongjing River and the Neijing River,but no patients with endemic arsenic disease were found.Conclusions The high arsenic water sources are distributed mainly in the drainage areas of the Dongjing River and the Neijing River.It is suggested that the interrelated government departments should take precise measures to impmve the quality of drinking water and ensure safe water to the residents in high arsenic areas.

?Age-related macular degeneration ( AMD) is one of the main leading causes of irreversible damage eyesight over the 50 years old people. Genetic factors play an important role in the occurrence and development of AMD. ln recent years, the studies found that complement factor H ( CFH) gene has obvious correlation with the incidence of AMD. ln this article, we reviewed the researches on the CFH in AMD.

Objective To provide a practical device and protocol to hold conscious rats for subsequent operations which can overcome the disadvantages of existing methods .Users can complete the experiment more efficiently , with or without prior experience .Methods Using transparent plastic film , plastic sealing machine and sponge to make a simple device for holding rats , by taking advantage of their escaping nature .To compare the performance of the new method and existing methods for holding and injecting rats .Results Compared with existing methods , the new device and method can reduce the time-consuming to hold rats by 44.7%, from 18.13 seconds to 10.03 seconds.For holding and injecting , the new method can reduce the time-consuming by 55.3%, from 139.33 seconds to 52.26 seconds .Conclusions The new device and method is good for holding and injecting rats or drawing blood from the caudal veins .It can shorten the time of operation and reduce the stress reaction in the animals .It’ s especially helpful for inexperienced experimenters such as students in teaching and research tasks .