Adolescent ; Female ; Humans ; Patellar Dislocation ; physiopathology ; surgery ; Patellar Ligament ; injuries ; physiopathology ; surgery ; Range of Motion, Articular ; Reconstructive Surgical Procedures

To study the expression of the bFGF and its receptor in the mouse bone marrow by treatment with acute radioactive injury and Ligustrazine, 56 mice were divided into 3 groups: normal group, radiation-injured group and Ligustrazine group. After irradiation by 6.0 Gy 60Co gamma-ray, each mouse was orally given 0.1 ml Ligustrazine twice a day for 13 days in Ligustrazine group, and each mouse in radiation injured group was orally given equal amount of saline. On the 3rd, 7th, 14th day after irradiation, bone marrow mono-nuclear cells (BMMNC) were counted, and the expression levels of bPGF and bFGFR in bone marrow were evaluated by immunohistochemistry and flow cytometry analysis respectively. On the 3rd, 7th, 14th day after irradiation, expression of bFGF in bone marrow were significantly lower than in normal group (P<0.05 or P<0.01). Expressions of bFGF and bFGFR were much higher in Ligustrazine treated group than that in the control group (P<0.05 or P<0.01). Ligustrazine potentiate the expression of bFGF and bFGFR in bone marrow MNC to recover the bone marrow hematopoiesis inductive microenvironment, which is one of the mechanisms by which Ligustrazine rebuild the bone marrow hematopoiesis after acute radioactive injury.
Bone Marrow Cells/metabolism ; Fibroblast Growth Factor 2/*biosynthesis ; Hematopoiesis/drug effects ; Pyrazines/*pharmacology ; Radiation Injuries, Experimental/*metabolism ; Radiation-Protective Agents/pharmacology ; Receptors, Fibroblast Growth Factor/*biosynthesis

Objective To compare the effects of ephedrine and phenylephrine on hemodynamics in the patients undergoing surgery in prone position under general anesthesia.Methods Sixty American Society of Anesthesiologists physical status Ⅰ or Ⅱ patients, aged 20-60 yr, with body mass index of 18.5-2:5.0 kg/m2, scheduled for elective posterior lumbar interbody fusion under general anesthesia, were randomized to ephedrine group (group E, n =30) or phenylephrine group (group P, n =30).When hypotension [decrease in systolic blood pressure (SBP) ＞20％ of the baseline value, T0] occurred in supine position, SBP, diastolic blood pressure (DBP), mean arterial pressure (MAP), heart rate (HR), cardiac output (CO), cardiac index (CI) and central venous pressure (CVP) were recorded, and ephedrine 0.1 mg/kg (group E) or phenylephrine 1 μg/kg (group P) was injected via the central veins.The parameters mentioned above were recorded within 10 min after administration (T1-T10).Results Both ephedrine and phenylephrine could maintain the parameters of hemodynamics at the normal level.Compared with the baseline values at T0 , SBP, DBP, MAP and HR at T1-T10 and CO and CI at T2-T10 were significantly increased, and no significant change was found in CVP at each time point after administration in group E, and SBP and MAP at T1-T6, DBP at T1-T5, CVP at T2 and T3, and CO and CI at T1-T3 were significantly increased, and HR was decreased at T2 and T3 in group P.Compared with group P, SBP was significantly decreased at T1, and increased at T2-T10, DBP and MAP were decreased at T1, and increased at T3-T10, HR was increased at T1-T10, CO and CI were increased at T2-T10, and CVP was decreased at T1-T3 in group E.Conclusion Compared with phenylephrine, although ephedrine provides no significant effect on hemodynamics clinically, it can increase cardiac output to some extent in the patients undergoing surgery in prone position under general anesthesia.

Objective To explore absorption kinetics of roxatidine acetate hydrochloric (ROX) in intestine of rats.Methods The absorption kinetics and permeability of ROX under different concentrations and different intestinal segments were investigated by double wavelength spectrophotometry via the in situ perfusing method in rats.Results There was no significant difference in Ka of ROX under different concentrations.The absorption rate in rats descended in order of duodenum,jejunum,ileum and colon [(3.87±0.12)×10-2,(2.53±0.18)×10-2,(1.43-±0.10)×10-2,(0.91±0.15)×10-2 · h-1].Conclusion The absorption of ROX in intestine complies with the passive transport mechanism and first order kinetics.ROX is well absorbed in thewhole intestine.

OBJECTIVE: To study the induction effect of bencycloquidium bromide (BCQB) on rat liver cytochrome P450 enzymes. METHODS: Rats were divided into solvent control group, positive control (phenobarbital) group and BCQB group. The rats in BCQB groups were intranasally administered with 1, 3, and 9 mg · kg-1 BCQB, respectively. After multiple-dose administration, the rats were sacrificed, and the livers were weighed and prepared to microsomes. Then the liver coefficients were calculated, and the total content of CYP450 enzymes in liver microsomes was determined by spectrophotometer. HPLC-MS/MS method was adopted and validated to simultaneously determine the productive velocity of 6β-hydroxyl testosterone and paracetamol after incubation of rat liver microsomes. The activities of CYP1A1/2 and CYP3A1/2 were measured according to the productive velocity. RESULTS: The liver coefficients, total content of CYP450 enzymes, and activity of CYP1A1/2 were significantly different (P<0.05) between solvent control group and positive control group, while comparable (P>0.05) between solvent control group and BCQB groups. The activity of CYP3A1/2 in BCQB groups was not higher than solvent control group. CONCLUSION: Phenobarbital has induction effect on rat liver CYP450 enzymes. The test system can be used to evaluate the induction effect of BCQB on rat liver CYP450 enzymes. BCQB has no induction effect on liver CYP450 enzymes in rats.

The objective of this study was to screen out the effective shRNA which can inhibit the gene expression of tumour necrosis factor-alpha (TNF-alpha), to construct the recombinant plasmid and to determine its sequence so as to provide the new approach for searching gene therapy of TNF-alpha related diseases. The primary macrophages were added into 15% DMEM, then cells were adjusted as 2 x 10(7) cells/L and were inoculated in 6-well plate with 3 ml/well, and were cultured at 37 degrees C in a fully humidified atmosphere with 5% CO(2). Cells were stimulated with lipopolysaccharide (LPS) and the concentration of TNF-alpha in the supernatant at different time points was determined by enzyme-linked immunosorbent assay (ELISA). The 5 synthesized DNA sequences which can be transcripted into shRNA were transfected into cells with lipofectamine 2000, then the cells were stimulated with LPS for 24 hours. The concentration of TNF-alpha in the supernatant and the expression of TNF-alpha mRNA were determined by ELISA and reverse transcription polymerase chain reaction (RT-PCR) respectively. The most effective shRNA was inserted into plasmid, and the recombinant plasmid was identified by sequence analysis. The results showed that the concentration of TNF-alpha in the supernatant reached peak after the stimulation with LPS for 24 hours. In the RNA interference group, the shRNA 1 was the most effective one, which could inhibit the expression of TNF-alpha by 59.46% and the expression of TNF-alpha mRNA by 61.2%. The recombinant plasmid was cloned and the sequence of interest was obtained. In conclusion, the most effective shRNA targeting TNF-alpha was successfully screened out and the recombinant plasmid was constructed. The recombinant plasmid may be helpful to search new gene therapy for TNF-alpha related disease.
Animals ; Cells, Cultured ; Gene Expression ; Genetic Therapy ; Genetic Vectors ; Macrophages ; cytology ; Male ; Mice ; Mice, Inbred C57BL ; Plasmids ; RNA Interference ; RNA, Messenger ; genetics ; RNA, Small Interfering ; genetics ; Recombination, Genetic ; Transfection ; Tumor Necrosis Factor-alpha ; genetics

The objective of this study was to investigate the function and mechanism of hyperbaric oxygen (HBO) in antagonizing acute graft-versus-host disease (aGVHD) and improving the rate of survival. The lethally irradiated C57BL/6 recipients were injected with bone marrow and lymphocyte of spleen from BALB/c donors and were treated with HBO, cyclosporine A (CsA) and methotrexate (MTX). T lymphocytes and subsets, adhesion molecules and cytokines were detected by flow cytometry, ELISA and RT-PCR respectively. The results showed that the survival rate in HBO group was much higher than that in allogenetic bone marrow transplantation (allo-BMT) group and CsA + MTX group; the numbers of CD3(+), CD4(+), CD8(+), CD4(+)CD11a(+), CD4(+)CD18(+), CD8(+)CD11a(+), CD8(+)CD18(+) lymphocytes in spleen were decreased markedly by HBO and CsA + MTX (p < 0.05); the levels of IL-2 and TNFalpha mRNA and their serum concentrations in HBO group were much lower than those in allo-BMT group but were higher than those in CsA + MTX group; the levels of IL-4 and IL-10 mRNA in HBO group were much higher than those in allo-BMT group and CsA + MTX group. It is concluded that HBO has more remarkable advantage in improving the rate of survival than CsA + MTX, its mechanism of anti-aGVHD is tightly correlated with the transform of T cell and its subsets and the expression of adhesion molecules and cytokines.
Acute Disease ; Animals ; Bone Marrow Transplantation ; adverse effects ; Cytokines ; biosynthesis ; Female ; Graft vs Host Disease ; etiology ; therapy ; Hyperbaric Oxygenation ; Lymphocyte Transfusion ; adverse effects ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; T-Lymphocytes ; immunology ; Whole-Body Irradiation

The aim of this study was to explore the effect of hyperbaric oxygen (HBO) preconditioning on the rejection of skin allograft in mice and its molecular mechanism. BALB/c donor mice and C57BL/6 recipients received hyperbaric oxygen preconditioning once a day for 7 days. After skin transplantation, the recipients were treated with cyclosporine A (CsA) intraperitoneally. Immunofluorescent staining technique and flow cytometry were used to observe the influence HBO on percentage of spleen lymphocytes CD3+, CD4+, CD8+ and cell adhesion molecule LFA-1 (CD11a/CD18). The results showed that as compared with control, the numbers of CD3+, CD4+, CD8+, CD4+CD11a+, CD4+ CD18+, CD8+CD11a+, CD8+CD18+ lymphocytes of spleen decreased in HBO preconditioning groups and CsA group, and decreased markedly in HBO preconditioning combined with CsA group (p<0.05); the general state of recipient mice in HBO preconditioning combined with CsA group was better than that of recipient mice received HBO preconditioning or CsA only. It is concluded that the method of HBO preconditioning combined with traditional immunosuppressive agent CsA has remarkable advantage in inhibiting the rejection of skin graft. Its molecular protective mechanism is correlated with the expression of adhesive molecules on T cell subsets.
Animals ; Cell Adhesion ; Cell Adhesion Molecules ; pharmacology ; Cyclosporine ; pharmacology ; Female ; Graft Rejection ; prevention & control ; Graft Survival ; Hyperbaric Oxygenation ; Lymphocyte Count ; Lymphocytes ; cytology ; metabolism ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Skin Transplantation ; immunology ; Spleen ; cytology ; Transplantation Conditioning ; methods

Objective To compare the pressor responses to ephedrine during general anesthesia with different drugs.Methods Sixty ASA physical status Ⅰ or Ⅱ patients,scheduled for elective gastrointestinal tumor resection under general anesthesia,aged 20-64 yr,weighing 45-90 kg,were included in this study.The patients were randomized to receive dexmedetomidine + remifentanil + sevoflurane (group Ⅰ,n =20),propofol + remifentanil + sevoflurane (group Ⅱ,n =20),or dexmedetomidine + propofol + remifentanil + sevoflurane (group Ⅲ,n =20) to maintain the depth of anesthesia.Ephedrine 0.1 mg/kg was injected intravenously when the systolic blood pressure (SBP) was decreased to about 90 mm Hg during anesthesia.Blood pressure was monitored and recorded at 1-min intervals for 10 min after the injection.The onset time (TSBP,TDBP,TMAP) for ephedrine to raise the SBP,diastolic blood pressure (DBP) and mean arterial pressure (MAP) and the maximal amplitude (△SBP,△DBP,△MAP) were also recorded.Results Compared with Ⅱ group,TSBP,TDBP and TMAP were significantly shortened,and △SBP,△DBP and △MAP were increased in Ⅰ and Ⅲ groups (P ＜ 0.05).Conclusion Compared with propofol + remifentanil + sevoflurane combined anesthesia,dexmedetomidine + remifentanil + sevoflurane combined anesthesia and dexmedetomidine + propofol + remifentanil + sevoflurane combined anesthesia augment the pressor responses to ephedrine in patients.

Objective To evaluate and compare the clinical effects of proximal femoral nail antirotation blade (PFNA) with reverse less invasive stabilization system-distal femur (LISS) in the treatment of proximal femoral fractures associated with coxa vara. Methods From June 2007 to June 2010, A retrospective study with more than 10 months follow-up of 46 patients with proximal femoral fractures associated with coxa vara underwent PFNA or reverse LISS were carried out, including 24 with PFNA and 22 patients with reverse LISS. The physical status of patient was evaluated according to the American Society of Anesthesiologists (ASA) score. After the operation, the operation duration and volume of blood loss were assessed in the two groups, respectively. At the last follow-up, full weight bearing time, fracture healing time, and neck-shaft angle discrepancy related to contralateral side without fracture of the each group were assessed, respectively.Functional recovery was evaluated according to Parker and Palmer mobility score. Results The average follow-up period was 11.2 months (range, 10-12). All the fractures healed successfully and reached bony union.There were no significant differences between PFNA group and reverse LISS group for the average ASA score, the average operating time, the average volume of intraoperative bleeding and Parker and Palmer mobility score. The patients were allowed full weight-bearing from 9.33 weeks after surgery in PFNA group and from 16.95 weeks in reverse LISS group. The patients reached bony union after 17.21 weeks after surgery in PFNA group and from 30.73 weeks in reverse LISS group. Comparing with PFNA group, neck-shaft angle discrepancy decreased in reverse LISS group. Conclusion The results of PFNA and reverse LISS in the treatment of proximal femoral fracture were satisfactory. The fracture treated by PFNA allowed earlier weight bearing. Reverse LISS could provide better support for neck-shaft angle to avoid coxa vara more effectively.