[Objective] To observe the influence of rats serum SOD and cardiac function with qi deficiency syndrome through the factors of the acupuncture point injection with different reinforcing and reducing methods. [Methods] To establish SD rat heart-qi deficiency syndrome model with the compound factors of the feeding, load forced swimming and large dose propranolol. The rats were randomly divided into blank control group, model group, Zusanli(St. 36) Shenqi Fuzheng injection reinforcing method group, Zusanli(St. 36) Shenqi Fuzheng injection reducing method group. Each acupoint injection of 0.20ml, one time a day, for 10 consecutive days. Determine of serum SOD activity values respectively and detect cardiac function correlated hemodynamic indexes. [Results] (1) The activity of serum SOD in model group rats was significantly lower than control group( P<0.01);Treated groups and model group had significant difference(P<0.05 or P<0.01);Zusanli(St. 36) injection reinforcing method group and Zusanli(St. 36) reducing method group had significant differences(P<0.01);(2) The cardiac function of rats in model group decreased significantly, corresponding heart function index of each treatment groups had changes and obvious differences. The maximum ventricular rats model of the internal pressure, left ventricular systolic pressure ,the maximum rate of rise of left ventricular pressure, heart rate and other indicators of Zusanli(St. 36) Shenqi Fuzheng injection reinforcing method group were more than indexes of Zusanli(St. 36) Shenqi Fuzheng injection reducing method group( P<0.01). [Conclusion] Acupoint injection of different reinforcing-reducing manipulations had different effect on the treatment of disease, and Zusanli(St. 36) injection reinforcement treatment of heart-qi deficiency syndrome model rats was significantly better than the other groups.

BACKGROUND:The osmotic tissue expander is a self-fil ing device consisting of an osmotic active hydrogel which is made of vinylpyrrolidone and mehtylmethacrylate. It can absorb body fluids and swel up gradual y after embedded.
OBJECTIVE:To explore the short-term and long-term regular patterns as wel as histocompatibility of the osmotic tissue expander in vivo.
METHODS:A self-control design was carried out in Wistar rats by embedding the osmotic tissue expander and high-density polyethylene into each side of their spinal column subcutaneously. Wound healing, tissue expansion and inflammatory reaction were detected and compared at different periods after operation.
RESULTS AND CONCLUSION:Al the wounds got primary healing. The device expanded fastest at week 1 after the implantation. After being enlarged to about nine times that of the initial size at week 4, the expander slowed down its swel ing. It reached its ultimate volume at week 12 which was about 10 times as big as that of the initial one. Then it remained almost the same size until the end of our design. Pathological sections showed that the inflammatory reaction of osmotic-tissue-expander-group had no significant difference from that of the control group (P>0.05). These findings suggest that osmotic tissue expander has a slow-lasting swel ing ability and good histocompatibility.

BACKGROUND:Micro-arc oxidation technique is used to modify the surface properties of titanium and titanium al oy.
OBJECTIVE:To explore the surface properties of micro-arc oxidation film and its effect on the attachment, proliferation and alkaline phosphatase activity of MC3T3-E1.
METHODS:Forty-six pure titanium discs, 10 mm in diameter and 2 mm in thickness, were randomly divided into two groups. The discs of the experimental groups were treated by micro-arc oxidation technique in an electrolytic solution containing 0.02 mol/L sodiumβ-glycerophosphate and 0.2 mol/L calcium acetate;while the discs of the control group was machine-polished. The surface appearance of the discs was observed by a scanning electron microscopy, the ratio of calcium to phosphorus on the coating surface was detected by X-ray spectroscopy, and the crystal ine phase composition of the coating was detected by X-ray diffraction analysis. cellular morphology in the process of attachment was observed under the scanning electron microscope. cellproliferation was determined by cellcounting kit-8 at 2, 4, 74 days, while alkaline phosphatase activity were determined at 7 and 14 days.
RESULTS AND CONCLUSION:After micro-arc oxidation treatment, a rough and porous calcium-phosphate film was formed on the surface of titanium. The elements of micro-arc oxidation coating main mainly included Ca, P, O and Ti, and the micro-arc oxidation film was mainly composed of titanium oxide, calcium titanate, calcium phosphate and calcium metaphosphate. Under the scanning electron microscope, pseudopods appeared to grow out of the cells on the surface of micro-arc oxidation coating after 1 hour culture, and the typical morphology of the MC3T3-E1 cells could be observed at 4 hours. MC3T3-E1 proliferation (4 and 7 days of culture) and alkaline phosphatase activity (7 and 14 days of culture) were enhanced significantly in the micro-arc oxidation group compared with the control group. These findings indicate that the rough and porous calcium-phosphate coating produced by micro-arc oxidation technique on pure titanium surface could promote the early attachment, proliferation and osteogenic differentiation of MC3T3-E1.

In the present study, porous PCL (poly (epsilon-caprolactone)) scaffolds were prepared through a melted extrusion manufacturing (MEM) machine, and carboxylate groups were formed on the surfaces of specimen by hydrolyzation with NaOH aqueous solutions. Apatite precursor was introduced on the surfaces of specimens with CaCl2 and K2 HPO4 under vacuum condition, and mineralization study was applied to these specimens. The results showed that the hydrophilicity of PCL surface was improved with the introduction of carboxylate groups, and the contact angle of surface was decreased to 26.52 degrees. A dense and uniform bone-like layer was confirmed to be formed on the surface of Ca-P treated specimens after mineralizing for less than 24 h in SBF by SEM and EDAX.
Biocompatible Materials ; chemistry ; Bone Regeneration ; Guided Tissue Regeneration ; methods ; Humans ; Polyesters ; chemical synthesis ; Tissue Engineering ; Tissue Scaffolds ; chemistry

OBJECTIVETo study the incorporation rate and release behavior of bovine serum albumin (BSA) incorporated into the calcium phosphate coating by biomimetic deposition, as well as the physical and chemical properties of the hybrid coating, and to provide experimental basis for the fabrication of growth factor/biomimetic calcium phosphate coating and exploration for the loading/release behavior of growth factors.

METHODSPure titanium specimens were immersed into saturated calcium phosphate solutions(SCP) containing no BSA (controlled group) and 3 different concentrations of BSA (experimental groups) : 1, 10 and 100 mg/L. Biomimetic calcium phosphate coating was formed on titanium surface and BSA was incorporated into the coating through co-deposition. The topography of the specimen was observed using scanning electron microscopy (SEM). Chemical structure and phase composition of coatings were detected by Fourier infrared spectroscopy (FTIR) analysis and X-ray diffraction (XRD) respectively. BSA incorporation rate and release profile were determined by bicinchoninic acid protein assay kit.

RESULTSThe biomimetic calcium phosphate coating was mainly composed of hydroxyapatite and octacalcium phosphate. BSA was successfully incorporated into the calcium phosphate coatings in all the 3 experimental groups. With the increase of BSA concentration, plate-like units of the coatings were turned into small grid structure. BSA incorporation rates of the three experimental groups were (72.4 ± 2.4)%, (62.3 ± 0.9)% and (42.2 ± 1.7)% respectively. The in vitro release test showed that all three BSA release profiles could be divided into two significant different stages: early burst release stage and later sustained release stage. The amount of BSA release of the 3 experimental groups in 24 h and 30 d were (1.57 ± 0.09), (8.82 ± 0.93), (140.24 ± 3.12) µg, and (2.39 ± 0.29), (14.39 ± 0.70), (151.06 ± 2.00) µg respectively.

CONCLUSIONSBiomimetic calcium phosphate coating can be used as an effective carrier for protein. BSA concentration has an impact on the incorporation rate and release speed of BSA from the calcium phosphate coating. Favorable BSA incorporation rate and release behavior can be obtained at BSA concentration of 10 mg/L.

Biomimetic Materials ; Calcium Phosphates ; chemistry ; Durapatite ; In Vitro Techniques ; Microscopy, Electron, Scanning ; Serum Albumin, Bovine ; metabolism ; Spectrophotometry, Infrared ; Surface Properties ; Titanium ; X-Ray Diffraction

OBJECTIVETo investigate the effect of bone marrow mesenchymal stem cells (BMSCs) on secretion of inflammatory cytokines in macrophages stimulated by lipopolysacharide (LPS).

METHODSRat BMSCs and macrophages were isolated, cultured, and identified. The BMSCs and macrophages, cultured alone or in co-culture, were treated with LPS or PBS or without treatment and tested for interleukin-10 (IL-10) and tumor necrosis factor-α (TNF-α) concentrations in the supernatants at 1, 3, 5, 7, 12, and 24 h after the treatment using enzyme-linked immunosorbent assay.

RESULTSExposure to LPS caused significantly increased IL-10 and TNF-α concentrations in the supernatant of cultured macrophages but not in BMSC culture. Macrophages co-cultured with BMSCs showed significantly lowered IL-10 and TNF-α secretions in response to LPS exposure as compared with the macrophages cultured alone.

CONCLUSIONBMSCs can reduce LPS-induced secretion of inflammatory cytokines by the macrophages to ameliorate inflammatory reactions.

Animals ; Cells, Cultured ; Coculture Techniques ; Enzyme-Linked Immunosorbent Assay ; Inflammation ; Interleukin-10 ; secretion ; Lipopolysaccharides ; Macrophages ; secretion ; Mesenchymal Stromal Cells ; cytology ; Rats ; Tumor Necrosis Factor-alpha ; secretion

OBJECTIVETo analyze the development of liver damage and reactivation of hepatitis B virus (HBV) during the treatment of extremely severe burn injury in HBsAg positive patients, in order to provide reference for prevention and treatment of liver damage in patients with HBV infection after extremely severe burn.

METHODSMedical records of 54 HBsAg positive patients after extremely severe burn injury admitted from January 2004 to December 2014 were retrospectively analyzed. Development of liver damage and HBV reactivation of these patients during the treatment were analyzed according to the classification of their gender, results of hepatitis B e antigen (HBeAg) and HBV DNA examinations on admission, and development of sepsis in the process of treatment. Data were processed with chi-square test.

RESULTS(1) The incidence of liver damage in the process of treatment of these patients was 85.2% (46/54). Among all the patients, the proportion of liver damage was 35/38 in male, which was significantly higher than that in female (11/16, χ² = 4.867, P<0.05). Liver damage was found in all of 26 patients who were HBeAg positive on admission, 34 patients who were HBV DNA positive on admission, and 36 patients who developed sepsis in the process of treatment; the proportions were significantly higher than those in patients who were HBeAg negative on admission (20/28), patients who were HBV DNA negative on admission (12/20), and patients who did not develop sepsis in the process of treatment (10/18), with χ² values respectively 11.801, 18.384, and 20.574, P values below 0.01. (2) The incidence of HBV reactivation in these patients was 29.6% (16/54). Among all the patients, the proportion of HBV reactivation was 13/38 in male and 3/16 in female, with no statistically significant difference between them (χ² = 0.656, P>0.05). The proportions of HBV reactivation in patients who were HBeAg positive on admission, patients who were HBV DNA positive on admission, and patients who developed sepsis in the process of treatment were respectively 13/26, 16/34, and 15/36, and they were significantly higher than those in patients who were HBeAg negative on admission (3/28), patients who were HBV DNA negative on admission (0/20), and patients who did not develop sepsis in the process of treatment (1/18), with χ² values respectively 9.979, 18.615, and 5.873, P<0.05 or P<0.01.

CONCLUSIONSPatients who are HBsAg positive, HBeAg positive, HBV DNA positive on admission, and develop sepsis in the process of treatment of extremely severe burn injury are more likely to develop liver damage and HBV reactivation. It is necessary to dynamically monitor the changes in HBV DNA and liver function, in order to identity the reactivation of virus.

Alanine Transaminase ; blood ; Burns ; complications ; drug therapy ; Chemical and Drug Induced Liver Injury ; DNA, Viral ; Female ; Hepatitis Antibodies ; blood ; Hepatitis B ; drug therapy ; epidemiology ; virology ; Hepatitis B Surface Antigens ; blood ; immunology ; Hepatitis B virus ; drug effects ; immunology ; isolation & purification ; Hepatitis B, Chronic ; blood ; pathology ; virology ; Humans ; Incidence ; Liver ; pathology ; Male ; Retrospective Studies