2.Breeding Actinobacillus succinogenes with Acid-tolerance by Genome Shuffling
Xuan LIU ; Pu ZHENG ; Ye NI ; Jin-Jun DONG ; Zhi-Hao SUN ;
Microbiology 2008;0(11):-
A strain Actinobacillus succinogenes CGMCC 1593 was selected as the parent strain.After UV-EMS and UV-DES treatments respectively,seven mutated strains with subtle improvements in acid tol-erance were obtained,and were subjected for recursive protoplast fusion.Through three rounds of genome shuffling,four shuffled strains with both higher yield and acid tolerance were obtained.The shuffled strain namely F3-21 could even survive at pH 5.2.The comparison of the shuffled strains and the parent strain for succinic acid production was also studied here.After 48 h of shake-flask fermentation,the succinic acid concentration of F3-21 was 48% higher than that of the parent strain.When F3-21 was carried out in a 5 liter stirred bioreactor with pH controlled 5.6~6.0,the accumulation of succinic acid in 48 h fermentation attained 38.1 g/L,which was increased by 45% compared with that of the parent strain(26.2 g/L).While pH was controlled at 6.5~7.0,the production of succinic acid in 32 h fermentation attained 40.7 g/L.When F3-21 was carried out in fed-batch fermentation,succinic acid concentration of 67.4 g/L was reached in 72 h fer-mentation.These results indicated that the genome shuffling could improve the acid tolerance and the suc-cinic acid production of A.succinogenes CGMCC 1593.
3.The experimental study on effect of the spinal neuron flow with the nerve repair time
Zhao-Peng XUAN ; Lai-Jin LU ; Zhi-Gang LIU ; Jia-Ao YU ;
Chinese Journal of Microsurgery 2000;0(04):-
Objective To measure Ihe effect on rats spinal neuron flow according nerve roots repair time.Methods We adopted the experimental rats on the root avulsion and extravertebral foramen nerve root divison of C_(5~7).We divided them into four groupsin each which there were 16 ratsaccording the type of nerves root injury and repair timeGroup AC:the avulsed roots were reimplanted into the spinal cord and the transeeted roots were sutured to the proximal stump immediately.Group B,Dthe avulsed roots and the transected roots were reimplanted into the spinal cord or were sutured to the proximal stump in delayed 3 weeks each with 16 rats.At the different time point(3 weeks3 months6 months)through pathological examina- tion and immunohistological lechniques and nerve tracing techniqueswe examined the spinal cord and distal nerve trunk in order to observe the pathologic changes and axonal regeneration.Results Group A、C were much better than group B、D in the numberthe conformation and the degree of abatement of spinal motoneu- rons and nissl body.It is the same on the number and the development level of regenerating nerve fiber. Conclusion It had the advantage of neuronal protection and nerve regeneration that reparing the injured nerve roots earlv after nerve roots injury.
4.Arthroscopic rotator cuff repair using a suture-bridge technique in late middle-aged adults.
Jin-xuan LI ; Lei ZHANG ; Jin-song LIU ; Jia MA ; Zhi-yao LI ; Jin SUN ; Sheng ZHANG ; Xiao-hua LIU
China Journal of Orthopaedics and Traumatology 2015;28(10):951-954
OBJECTIVETo evaluate the clinical results after arthroscopic rotator cuff repair using a suture-bridge technique in late middle-aged adults.
METHODSA retrospective analysis of 30 patients with rotator cuff tears, who were treated consecutively between December 2012 and December 2013 at our clinic, was carried out to evaluate the outcome of arthroscopic suture-bridge technique. The visual analogue scale (VAS), the range of motion (ROM), the rating scale of the University of California at Los Angeles (UCLA), and the shoulder index of the American Shoulder and Elbow Surgeons (ASES) were determined as the evaluation criteria.
RESULTSThe mean follow-up period was 13 months. The follow-up rate was 100%. The study included 0 small, 16 medium, 12 large and 2 massive rotator cuff tears. At the latest follow-up, the VAS score decreased significantly from preoperative 6.3±3.2 to 0.8±1.4 at rest,and from preoperative 7.7±2.1 to 1.7±1.6 during motion. The UCLA score improved significantly from 15.1±4.6 preoperatively to 31.2±5.0 at follow-up. The ASES shoulder index improved significantly from 30.2±16.0 preoperatively to 80.4±13.0 at follow-up. The ROM improved significantly. The satisfactory rate was 94%. There were no complications.
CONCLUSIONThe results of this study indicate that the arthroscopic suture-bridge technique is an effective and reliable treatment for patients with rotator cuff tear in late middle-aged adults.
Age Factors ; Aged ; Arthroscopy ; methods ; Female ; Humans ; Male ; Middle Aged ; Range of Motion, Articular ; Rotator Cuff ; surgery ; Suture Techniques
5.Changes of the mitochondrial DNA copy number and the antioxidant system in the PBMC of hepatocellular carcinoma.
Yuan GAO ; Hong-jing NIE ; Dong YANG ; Cheng-shi DING ; Min JIN ; Zhi-qiang CHEN ; Zhi-gang QIU ; Xuan GUO ; Zhao-lila CHEN ; Jun-wen LI
Chinese Journal of Applied Physiology 2016;32(1):1-5
OBJECTIVETo investigate the relationship between the changes of the copy numbers of mtDNA in peripheral blood mono-nucle- ar cell(PBMC) and the disordered of antioxidant capacity of hepatocellular carcinoma (HCC) patients.
METHODSThe Ficoll Hypaque method was used to isolate the PBMC from blood specimens. The ND1 gene of the mitochondrial was amplified by real-time PCR; meantime β-actin was served as a quantitative standard marker; the difference of mtDNA copy number in PBMC was compared between HCC and healthy control group. The level of reactive oxygen species (ROS) in PBMC was determined by flow cytometry. The change of total antioxidant capacity (T- AOC) of plasma was detected by the biochemistry examination.
RESULTSThe copy numbers of ND1 gene in PBMC of HCC was 73% that of the healthy control group,which suggested a decrease of the copy numbers of mtDNA in HCC. The levels of ROS of PBMC in HCC was (417. 82 ± 110.62) and (301.82 ± 75.54) in control group, which showed that the levels of ROS of PBMC in HCC were significant higher than that in control group (P < 0.01).Plasma T-AOC in HCC was (1.30 ± 0.85), and (3.20 ± 1.62) in control. The T-AOC of plasma of HCC was significantly lower than in control group (P < 0.01).
CONCLUSIONThere was a certain relationship between the decrease of the copy numbers of mtDNA and the disordered antioxidant capacity in hepatocellular carcinoma, which may be associated with the development of hepatocellular carcinoma.
Actins ; Antioxidants ; metabolism ; Carcinoma, Hepatocellular ; blood ; genetics ; Case-Control Studies ; DNA Copy Number Variations ; DNA, Mitochondrial ; genetics ; Humans ; Leukocytes, Mononuclear ; metabolism ; Liver Neoplasms ; blood ; genetics ; Reactive Oxygen Species ; metabolism
6.Study on the correlation between acute lymphoblastic leukemia and HLA genes in southern China Han population.
Su-Qing GAO ; Zhi-Hui DENG ; Shi-Zheng JIN ; Su-Ying ZHANG ; Xuan ZHANG ; Guo-Guang WU
Journal of Experimental Hematology 2005;13(2):210-214
To study the correlation between acute lymphoblastic leukemia (ALL) and HLA-A, B and DRB1 gene in southern Chinese Han population and to investigate the susceptible HLA gene to ALL, a total of 4707 healthy volunteer bone marrow donors from southern Chinese Han population were used as a control group, 201 patients diagnosed as patient group from southern Han individuals were genotyped at HLA-A, B and DRB1 loci by PCR-SSP, PCR-SSOP and SBT. HLA allele frequency and its distribution of ALL patient group were compared with the control group by using chi(2) test, and calculated the statistic value of relative risk (RR), pathogenicity score (EF) and preventive score (PF). The results showed that in comparison with the control group, the gene frequence of HLA-A26, B56 and DR9 increased significantly, but the gene frequence of HLA-A30, A33 and B58 allele frequency decreased significantly for patients with ALL. It is concluded that HLA-A26, B56 and DR9 gene have a high correlation with ALL and seem to contribute the genetic susceptibility to ALL in southern Chinese Han populations. However, HLA-A30, A33 and B58 gene seem to have protective role for southern Han individuals suffered from ALL.
Adolescent
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Adult
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Alleles
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Asian Continental Ancestry Group
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genetics
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Chi-Square Distribution
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Child
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Child, Preschool
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China
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Gene Frequency
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Genetic Predisposition to Disease
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ethnology
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HLA-A Antigens
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genetics
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HLA-B Antigens
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genetics
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HLA-DR Antigens
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genetics
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HLA-DRB1 Chains
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Middle Aged
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Precursor Cell Lymphoblastic Leukemia-Lymphoma
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ethnology
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genetics
7.Effects of acupuncture on blood-lipid levels in the patient of cerebral infarction with hyperlipidemia.
Jing-xian HAN ; Xuan JIN ; Cun-zhi LIU ; Tao WANG ; Ming-xia LU
Chinese Acupuncture & Moxibustion 2006;26(6):399-402
OBJECTIVETo observe therapeutic effect of acupuncture method for consciousness-restoring resuscitation on cerebral infarction with hyperlipidemia.
METHODSSixty cases of apoplexy with hyperlipidemia were randomly divided into a consciousness-restoring resuscitation acupuncture group (treatment group) and a Chinese medicine control group (control group), 30 cases in each group. TCM symptomatic scores and indexes of blood lipids were detected before and after treatment in the two groups.
RESULTSThe total effective rate for improvement of blood lipids was 72.4% in the treatment group, which was not different from that (65.5%) in the control group (P> 0.05); the total effective rate for clinical symptoms was 89.7% in the treatment group, which was better than that (62.1%) in the control group (P < 0.05). The treatment group was superior to the control group in improvement of numbness and twinge in extremities, dizziness, distention and oppressed feeling in chest and hypochondrium, anorexia, sleepy and weakness (P < 0.05).
CONCLUSIONAcupuncture method for consciousness-restoring resuscitation can regulate metabolic disorder of lipids and improve main clinical symptoms in the patient of cerebral infarction with hyperlipidemia.
Acupuncture Therapy ; Adult ; Aged ; Cerebral Infarction ; blood ; Cholesterol ; blood ; Female ; Humans ; Hyperlipidemias ; therapy ; Lipids ; blood ; Male ; Middle Aged ; Triglycerides ; blood
8.Association between maternal pre-pregnancy body mass index and adverse outcomes of late preterm infants.
Zhi-Xuan YUAN ; Xiao-Hong WEN ; Jin-Hua HUANG ; Quan LIU ; Hui-Zhi HUANG ; Mei YU ; Li MA
Chinese Journal of Contemporary Pediatrics 2016;18(12):1232-1236
OBJECTIVETo study the association between maternal pre-pregnancy body mass index (BMI) and adverse outcomes of late preterm infants (LPI).
METHODSA total of 367 LPI who were born from January 2011 to December 2015 and admitted to the neonatal ward were enrolled. The BMI criteria for Chinese population were used to analyze the factors for maternal pre-pregnancy BMI and its association with adverse outcomes of LPI (1 minute Apgar score ≤7, delivery room resuscitation, hospitalization days after birth >7 days, and ventilation duration ≥6 hours).
RESULTSOf all LPIs, there were 64 LPI (17.4%) in the low maternal pre-pregnancy BMI group, 243 LPI (66.2%) in the normal maternal pre-pregnancy BMI group, and 60 LPI (16.4%) in the high maternal pre-pregnancy BMI group. Low pre-pregnancy BMI was the risk factor for 1 minute Apgar score ≤7 (OR=3.243, 95% CI: 1.102-9.546) and need for delivery room resuscitation (OR=3.492, 95%CI: 1.090-11.190), and high pre-pregnancy BMI was the risk factor for hospitalization days after birth >7 days (OR=1.992, 95%CI: 1.024-3.874).
CONCLUSIONSAbnormal maternal pre-pregnancy BMI has adverse effects on the outcomes of LPI. In order to reduce these adverse outcomes BMI should be controlled within the normal range in pregnant women.
Adult ; Apgar Score ; Body Mass Index ; Female ; Humans ; Infant, Newborn ; Infant, Premature ; Male ; Pregnancy ; Pregnancy Complications ; Risk Factors
9.Parameter optimization for non-contrast-enhanced selective magnetic resonance portography imaging.
Xuan WANG ; Shun-da DU ; Hua-dan XUE ; Zheng-yu JIN ; Ying-yun YANG ; Meng-yu LIU ; Xin-zhi ZHAO ; Zhao-yong SUN ; Yang JIN ; Hong-yi SUN
Acta Academiae Medicinae Sinicae 2013;35(3):299-304
OBJECTIVETo evaluate subtraction images acquired with 3D true steady-state free-precession(SSFP)sequence combined with time-spatial labeling inversion pulse(T-SLIP)for selective and non-contrast-enhanced(non-CE)visualization of the portal venous system,and explore the optimization of this protocol.
METHODSTotally 13 healthy volunteers were recruited.Respiratory-triggered 3D true SSFP sequences on a 1.5T MRI system combined with T-SLIP placed on the spleen and mesenteric area were performed.The portographic images were generated from the subtraction between the pulse on and off images.According to the difference in inversion time(TI)of T-SLIP,four image groups group A(TI of 1300 ms),group B(TI of 1100 ms),group C(TI of 900 ms)and group D(TI of 700 ms),were assigned and compared to detect the optimal TI for portography.For quantitative analysis,the signal intensity(SI)of left and right liver lobe,the large vessels as main,right and left portal vein(MPV,RPV and LPV,respectively)and small vessels as branches of segments four(P4),six(P6)and eight(P8)were measured.The relative SI of MPV,RPV and LPV,as well as P4,P6 and P8 were also compared.For qualitative evaluation,the quality score of visualization was also evaluated using a 4-point scale.One-Way ANOVA and LSD test were used for comparison of quantitative data,and Friedman signed rank test was used for comparison of qualitative scores.
RESULTSIn 52 sequences of 13 volunteers,the selective visualization of the portal vein was all successfully conducted.Quantitative evaluation showed significant increased SI at the left lobe between C and D groups and A and B groups(comparison of group C to group A and BP=0.004,0.011;comparison of group D to group A and BP=0.001,0.004),while relative SI of LPV of groups C and D were lower than groups A and B(comparison of group C to group A and BP=0.015,0.015;comparison of group D to group A and BP=0.000,0.000).The relative SI of MPV in group D were decreased than groups A(P=0.000),B(P=0.000),and C(P=0.019).There was no significant difference in relative SI of small vessels among four groups(P>0.05).The image score of portal vessels in four groups also showed no differences(P>0.05).
CONCLUSIONS3D true SSFP scan with T-SLIP enabled selective non-CE visualization of the portal vein with digital subtraction method.A fixed TI of both 1300 and 1100 ms can be preferable.
Adult ; Contrast Media ; administration & dosage ; Female ; Humans ; Magnetic Resonance Angiography ; Magnetic Resonance Imaging ; methods ; Male ; Portal Vein ; anatomy & histology ; Young Adult
10.Sexual-nerve-Sparing radical cystectomy: experience with 32 cases.
Yi-min WANG ; Jin-dan LUO ; Guo-sheng YANG ; Bo-hua SHEN ; Zhi-gen ZHANG ; Xuan-wen ZHU ; Song-liang CAI
National Journal of Andrology 2006;12(11):1014-1020
OBJECTIVETo evaluate the effect of sexual-nerve-sparing radical cystectomy.
METHODSThirty-two male patients were treated with sexual-nerve-sparing radical cystectomy in our hospital in the past 5 years. The age of the patients ranged from 38 to 72 years, with the course of the disease ranging from 2 days to 20 years. All of them were potent preoperatively. Radical cystectomy was performed antegradely and retrogradely with the neurovascular bundle spared.
RESULTSThe patients were followed up for 6 to 54 months, 3 achieved sexual activity of Grade I, 6 Grade II and 23 Grade III after the operation. The recovery time of erectile function ranged from 2 to 14 months, averaging at 4. 5 months.
CONCLUSIONWhenever condition suits, sexual-nerve-sparing radical cystectomy is to be strongly recommended.
Adult ; Aged ; Coitus ; Cystectomy ; methods ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Penile Erection ; Penis ; innervation