The effects of pretreatment methods of Jerusalem artichoke tubers on microbial lipids fermentation with an oleaginous yeast strain Rhodosporidium toruloides Y4 were investigated in shaking flask culture.The yeast strain accumulated substantial amount of lipids using either purple-or white-skinned Jerusalem artichoke tubers as sole carbon and energy source.When cells were cultured on the extracted juice or the acidhydrolysate,cellular lipid content reached 40%(w/w),while cultured on the pulp,the white-skinned tubershadhigher lipid productivity,yielding 12.1 g lipids per100 g dried tubers.Major fatty acid constituents of microbial lipids were those contained 16-and 18-carbon atoms based on GC analysis,which is quite similar to traditional vegetable oil.Microbial lipids prepared from Jerusalem artichoke can be applied to biodiesel production.

Culture medium and fermentation conditions for lipid production by Rhodosporidium toruloides were optimized with single factor and uniform design experiment. The best medium recipe was found with 70 g/L glucose, 0.1 g/L (NH4)2SO4, 0.75 g/L yeast extract, 1.5 g/L MgSO4. 7H2O, 0.4g/L KH2PO4, sterilized at 121 degrees C for 15 min, and then supplemented with ZnSO4 1.91 x 10(-6) mmol/L, CaCl2 1.50 mmol/L, MnCl2 1.22 x 10(-4) mmol/L and CuSO4 1.00 x 10(-4) mmol/L. The optimal fermentation conditions were as follows: 50 mL of medium (pH 6.0) in 250 mL Erlenmeyer flask with 10% inoculum (28h) under orbital shaking at 200 r/min for 120h at 30 degrees C. Under these conditions, yeast biomass accumulated lipids up to 76.1%.
Basidiomycota ; growth & development ; metabolism ; Copper ; pharmacology ; Culture Media ; Fermentation ; Hydrogen-Ion Concentration ; Lipids ; biosynthesis ; Magnesium Sulfate ; pharmacology ; Zinc ; pharmacology

OBJECTIVETo analyze and optimize the gene rearrangement primers of different frame regions (FR) of immunoglobulin heavy chain (IgH) genes by bioinformatic methods and explore the application of these primers in the detection of paraffin-embedded lymphoma tissues.

METHODSThree pairs of primers from IgH FR1, FR2 and FR3 regions (P1c, P2A and P31, respectively) were selected as the B cell gene rearrangement primers after comparison of the gene fragments in 44 IgH variable and 6 joining regions. Using one pair of T cell receptor (TCR) gamma primer as the T cell gene rearrangement primer, 101 histopathologically confirmed lymphoproliferative samples including 80 B cell lymphomas, 14 T cell lymphomas, and 7 reactive proliferative lymph nodes were examined by PCR for gene arrangement. The DNAs from DG75 and Jurkat cell lines were used as the positive controls for B and T cell lymphoma, respectively, with those from reactive proliferative lymph nodes as the negative control.

RESULTSThe positivity rates of IgH primers (P1c, P2A and P31) in the 80 B cell lymphomas were 37.5% (30/80), 52.5% (42/80) and 70.0% (56/80), respectively, and only one of the 14 T cell lymphoma cases was positive for the primers, suggesting significant differences in the detection rates of B cell lymphomas by the 3 primers. The detection rate was increased to 83.9% by combining the results by P31 and P2A primers. No positivity was found in the proliferative reaction tissues.

CONCLUSIONPrimers from IgH FR3 region genes are more sensitive than that from the FR1 and FR2 regions in the detection of gene rearrangement in paraffin-embedded lymphoma tissues. The detection rates can be increased by combining the results with the primers for IgH FR3 with that of FR2.

DNA Primers ; Gene Rearrangement, B-Lymphocyte, Heavy Chain ; genetics ; Humans ; Immunoglobulin Heavy Chains ; genetics ; Lymphoma, B-Cell ; diagnosis ; genetics ; pathology ; Lymphoma, Non-Hodgkin ; diagnosis ; genetics ; pathology ; Lymphoma, T-Cell ; diagnosis ; genetics ; pathology ; Male ; Paraffin Embedding

OBJECTIVETo explore the feasibility and therapeutic effect of thinned posterior tibial artery free perforator flap for the reconstruction of soft tissue defects at dorsum of hands.

METHODSSix fresh adult lower limbs specimens were injected with red latex via arterial cannula and dissected. The number, distribution, branches, and outer diameter of posterior tibia artery perforators were observed. Based on the anatomic study, the perforator flaps were designed to reconstruct soft tissue defects at dorsum of hands and wrists. The redundant fat on the flaps was removed, but preserving the nutrient vascular system. 11 flaps were used with the size ranging from 2 cm x 5 cm to 10 cm x 14 cm.

RESULTS43 skin perforators of posterior tibial artery were observed in six lower limbs, 29 perforators with the outer diameter is greater than 0.5 mm when they threading over the deep fascia plane, on average every 4.8 bundles of sides. The mean outside diameter of perforating artery is (1.8 +/- 0.5) mm, and the length is (44 +/- 15) mm. 6 perforators were founded both in the second and fifth zone which could be used for anastomosis for its better diameters. All flaps survived completely without any complication at donor sites. 7 cases were followed up for 3-12 months. Both satisfactory functional and cosmetic results were achieved with a soft and thinned appearance.

CONCLUSIONSThe thinned posterior tibial artery free perforator flap has a reliable blood supply and good appearance. It is very suitable for the reconstruction of small or medium-sized defects at the dorsum of hands and wrists.

Adolescent ; Adult ; Female ; Hand Injuries ; surgery ; Humans ; Lower Extremity ; anatomy & histology ; blood supply ; Male ; Middle Aged ; Perforator Flap ; blood supply ; Reconstructive Surgical Procedures ; methods ; Tibial Arteries ; anatomy & histology ; transplantation ; Young Adult

As propose of organ repair stem cell therapy technology, articular cartilage cannot be repaired by itself has become one of the research hotspots, repair of articular cartilage with mesenchymal stem cells has shown obvious advantages for the treatment. The scholars have made a preliminary study on the role of mesenchymal stem cells from different sources in the repair of knee articular cartilage, and with the combination of transplantation and cartilage tissue engineering, these technologies improved the human cartilage repair effect of bone marrow, adipose, synovium, cord blood derived stem cells, which achieved good clinical curative effect. Due to the different sources, the dominant and recessive factors, each stem cell will have certain advantages and disadvantages. At present, the clinical research is still in the experimental stage, there is no definite conclusion on which kind of stem cell or technology is more suitable for human cartilage repair. This requires the validation of large-scale or combining with new processing technology clinical trials and the long-term clinical effect, it also provides for the basis for further clinical research.

OBJECTIVETo study the correlation between a pentanucleotide repeats (PNR) polymorphism of APOA and the genesis of intracranial aneurysm.

METHODSFifty-eight patients with intracranial aneurysms diagnosed by angiography and 58 healthy controls were enrolled in our study. The gene polymorphism of APOA PNR were detected by polymerase chain reaction (PCR) and non-denatured polyacrylamide gels electropherosis (PAGE).

RESULTSEight kinds of gene types and 6 kinds of alleles were found in these two groups. There were two sites of sequence variance in the 5' control region of APOA gene, which were significantly different between the patients and controls.

CONCLUSIONCorrelation may exist between intracranial aneurysm and APOA gene.

Adult ; Aged ; Alleles ; Apolipoproteins A ; genetics ; Asian Continental Ancestry Group ; DNA ; genetics ; Female ; Gene Frequency ; Genotype ; Humans ; Intracranial Aneurysm ; genetics ; Male ; Microsatellite Repeats ; Middle Aged ; Polymorphism, Genetic

OBJECTIVETo study the expression and pathological implication of transforming growth factor-1 (TGF-1) and endothelin-1 (ET-1) in intraacinar pulmonary arterioles of children with congenital heart disease and pulmonary hypertension (HP).

METHODSForty-one children with left-to-right shunt congenital heart disease were studied including 25 cases of HP (group A), 16 cases without HP (group B) and 10 children without congenital heart disease as the contols (group C). Expression of TGF-beta1 mRNA and ET-1 mRNA in intraacinar pulmonary arteriolar (IAPA) was studied using in-situ hybridization and image pattern analysis of their absorption values (A value). Changes of the intraacinar arterioles and lung tissue were studied by elastic fiber staining and electronic microscopy respectively.

RESULTS(1) There was a significant difference in the amount of intraacinar pulmonary arterioles (partial-muscular and muscular) counted in either group A or B in comparing with that of group C (F values 149.96 and 142.01 respectively, P < 0.01); (2) Electronic microscopy demonstrated endothelial proliferation of the small arteries, thickening of arteriolar wall, increased density of collagen fibers at adventitia and increased thickness of the capillary basal membrane; (3) The A value of TGF-beta1 mRNA expressed in the pulmonary arterioles of groups A and B by in-situ hybridization were 0.1988 +/- 0.0498 and 0.1098 +/- 0.0428 respectively, however, the expression was weak in group C (A value: 0.0578 +/- 0.0096). There were all significant between each two groups (F = 45.95, P < 0.01). The expression of ET-1 mRNA was markedly increased as well in the endothelial cells of pulmonary arterioles in both groups A and B, with A values of 0.1692 +/- 0.0205 and 0.1004 +/- 0.0140 respectively, whereas the expression was weak in group C (A value of 0.0746 +/- 0.0119). There were all significant between each two groups (F = 139.996, P < 0.01).

CONCLUSIONSThe number of intraacinar pulmonary partial-muscular and muscular arterioles in patients with left-to-right shunt congenital heart defect is drastically increased, along with marked restructuring of the pulmonary vasculatures. In addition, there seems a correlation present between the overexpression of TGF-beta1 mRNA and ET-1 mRNA in intraacinar pulmonary arterioles and the occurrence of pulmonary hypertension in patients with congenital heart disease.

Child ; Child, Preschool ; Endothelin-1 ; biosynthesis ; genetics ; Female ; Heart Defects, Congenital ; complications ; metabolism ; pathology ; Humans ; Hypertension, Pulmonary ; complications ; metabolism ; pathology ; Infant ; Lung ; pathology ; ultrastructure ; Male ; Pulmonary Artery ; metabolism ; pathology ; RNA, Messenger ; biosynthesis ; genetics ; Transforming Growth Factor beta1 ; biosynthesis ; genetics

OBJECTIVETo evaluate the effect of intraoperative continuous nimodipine infusion on cerebral vasospasm during intracranial aneurysm surgery.

METHODSThirty consecutive patients under-going intracranial aneurysmal surgery were prospectively randomized into two groups: Isoflurane (group A, n = 15) and nimodipine (group B, n = 15). The patients in group A were maintained with 1 minimum alveolar concentration (MAC) isoflurane anesthesia during the whole procedure. The patients in group B were given nimodipine infusion continuously (20 microg.kg(-1).h(-1)) after induction of anesthesia and anesthetized with 1 MAC isoflurane. S100B levels in cerebrospinal fluid were determined before aneurysm clipping and 0, 2, 4 h after aneurysm clipping by enzyme linked immunosorbent assay. Assessment of mean blood flow velocity of parent arterial and arterial branches were performed before and after aneurysm clipping.

RESULTS(1) S100B in cerebrospinal fluid was increased significantly at 4 h after aneurysm was clipped in group A (F = 4.11, P < 0.05). However, S100B in cerebrospinal fluid was stable in group B in the whole procedure. (2) Mean arterial flow velocity of parent vessels in group B was lower significantly than that in group A (t = 2.08, P < 0.05). However, mean arterial flow velocity of distal vessels in both groups has no significant difference.

CONCLUSIONIntraoperative nimodipine infusion may prevent cerebral vasospasm during intracranial aneurysm surgery.

Adult ; Aged ; Anesthesia, Inhalation ; Anesthesia, Intravenous ; Anesthetics, Intravenous ; administration & dosage ; Female ; Humans ; Intracranial Aneurysm ; surgery ; Intraoperative Complications ; prevention & control ; Isoflurane ; administration & dosage ; Male ; Middle Aged ; Nimodipine ; therapeutic use ; Vasodilator Agents ; therapeutic use ; Vasospasm, Intracranial ; prevention & control

OBJECTIVETo elucidate whether lipid-lowering therapy with Xuezhikang can induce a decrease of cardiac events and an attenuation of total mortality in coronary heart disease (CHD) patients with diabetes.

METHODSWe designed a random, double-blinded, placebo controlled clinical trial in selected 591 patients. All patients were administrated with capsule Xuezhikang (0.6 g, Bid) or placebo in addition to conventional therapy. The mean follow-up period was four years. The primary end-points were nonfatal myocardial infarction and death from CHD.

RESULTS(1) The incidence of CHD events and that of death from CHD were reduced by 50.8% (P = 0.0008) and by 44.1% (P = 0.0246) in treatment group, respectively; Also, the incidence of nonfatal myocardial infarction was reduced by 63.8% (P = 0.0151). (2) The incidence of stroke, tumor, and PCI/CABG were decreased by 20.2%. (3) The total mortality were lowered by 44.1% in treatment group (P = 0.0097).

CONCLUSIONXuezhikang can effectively reduce the incidence of cardiac events and total mortality in CHD patients with diabetes.

Aged ; China ; Coronary Disease ; complications ; drug therapy ; prevention & control ; Diabetes Mellitus ; Double-Blind Method ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Follow-Up Studies ; Humans ; Hypolipidemic Agents ; therapeutic use ; Male ; Middle Aged ; Secondary Prevention

The effects of cephradinum and ceftazidime on the metabolism of Escherichia coli (E. coli) DH5alpha was determined by microcalorimetry. The microbial activity was recorded as power-time curves through an ampoule method with a TAM Air Isothermal Microcalorimeter at 37 degrees C. The parameters such as the growth rate constant (k), inhibitory ratio (I), the maximum power output (Pm) and the time (tm) corresponding to the maximum power output were calculated. The results show that the ceftazidime has a better inhibitory effect on E. coli DH5alpha than cephradinum.
Anti-Bacterial Agents ; administration & dosage ; pharmacology ; Calorimetry ; methods ; Ceftazidime ; administration & dosage ; pharmacology ; Cephradine ; administration & dosage ; pharmacology ; Escherichia coli ; drug effects ; growth & development ; metabolism ; Microbial Sensitivity Tests