Preparation of Magnetic Solid Lipid Nanoparticles Co-loaded Quercetin and Resveratrol and Evaluation of Its Antitumor Effect / 中国实验方剂学杂志

Objective:To prepare magnetic solid lipid nanoparticles co-loaded quercetin and resveratrol(QR-MSLN),develop the reasonable characterization method,and investigate its inhibitory effect on transplanted hepatocarcinoma H22 tumor in mice. Method:Magnetic Fe3O4 particles coated with oleic acid(OA-Fe3O4) were synthesized and its structure was confirmed by Fourier transform infrared spectrometer(FT-IR).QR-MSLN was prepared by emulsion ultrasonic dispersion method,its morphology was examined by transmission electron microscopy,its particle size was determined by laser particle sizer.Concentration of Fe in the preparation was determined by phenanthroline spectrophotometry.The entrapment efficiency,saturation magnetization,in vitro release behavior were investigated by ultrafiltration centrifugation,vibrating sample magnetometer(VSM) and dialysis method,respectively.Mouse tumor model transplanted with hepatoma H22 ascites tumor was established and antitumor effect of QR-MSLN on H22 bearing mice were observed in the presence of an applied magnetic field. Result:Morphology of QR-MSLN was round,and black magnetic particles could be observed inside it,its particle size was (171.9±2.2) nm,the concentration of Fe was (1.40±0.46) g·L-1.The preparation exhibited apparent superparamagnetism and the saturation magnetization was 7.75 A·m2·kg-1.The entrapment efficiencies of quercetin and resveratrol in QR-MSLN were 99.10% and 80.83%,respectively.QR-MSLN had a significantly higher effect of tumor inhibition than SLN(containing quercetin and resveratrol) and free drug(PConclusion:QR-MSLN has uniform particle size and good magnetic response,and shows remarkable antitumor effect on H22 bearing mice.

Mechanism of endogenous carbon monoxide effect on hydrogen sulfide in guinea pigs with established allergic rhinitis / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To study the effect of carbon monoxide (CO) on hydrogen sulfide (H2S) in guinea pigs with allergic rhinitis (AR) through intervention treatment.</p><p><b>METHODS</b>AR model in guinea pigs was established by using ovalbumin. The animals were divided into three groups. Group one was sensitized continuously by ovalbumin, group two was treated with Hemin as induction group, and group three was treated with zinc protoporphyrin (ZnPP) as suppression group. The guinea pigs treated with saline were used as control. The behavior science scores, eotaxin concentration of nasal lavage, IgE in blood serum were recorded, and the plasma concentrations of CO and H2S were determined, then the expression of hemeoxygenase (HO)-1, cystathionine-beta-synthase (CBS) and cystathionine-gamma-lyase (CSE) were measured in nasal mucosa by fluorescent quantitative RT-PCR.</p><p><b>RESULTS</b>The behavior science scores, concentration of eotaxin in nasal lavage, IgE in blood serum and concentration of CO in plasma of sensitized group were higher than those of control (P<0.01), and the expression of HO-1 in nasal mucosa was also higher than control [(7.61+/-2.80)x10(-3) vs (2.32+/-1.14)x10(-3), P<0.05]. All these items were higher when treated with Hemin and lower when treated with ZnPP (P<0.05). The concentration of H2S in plasma was lower than control with significant differences [(14.80+/-1.60) micromol/L vs (18.90+/-1.00) micromol/L, P<0.01], the expression of CSE was also lower than control (P<0.05), and both of them were lower with Hemin induced and higher with ZnPP (P<0.05). The expression of CBS was very low and had no significant differences between groups (P>0.05), so it indicated that the CSE was the key enzyme for endogenous H2S product in nasal mucosa. Moreover the concentration of H2S was negatively correlated with CO (r=-0.702, P<0.001).</p><p><b>CONCLUSIONS</b>Endogenous CO and H2S play a significant role in the pathogenesis of AR, and HO-1 and CSE are the main speed-relate enzymes respectively. The H2S is also influenced by CO.</p>

Influence of carbon monoxide on the expression of inducible nitric oxide synthase mRNA in guinea pigs with allergic rhinitis / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To study the impact of carbon monoxide (CO) on expression levels of inducible nitric oxide synthase (iNOS) mRNA in guinea pigs with allergic rhinitis (AR).</p><p><b>METHODS</b>Twenty four guinea pigs were divided randomly into four study groups with 6 guinea pigs in each. The guinea pigs in the first group were treated with saline only (Group 1, the healthy controls). The remaing guinea pigs were sensitized by ovalbumin and thus establishing the AR models. After sensitization, the animals in the second group remained untreated (Group 2, AR control group). The third group was treated with Hemin as the induction group, and the fourth group was treated with Zinc protoporphyrin (ZnPP) as the suppression group. The plasma concentration of carboxyhemoglobin (COHb) was measured, which represents the concentration of CO. The expression levels of Heme oxygenase-1 (HO-1) and NOS mRNAs in nasal mucosa were determined by fluorescent quantitative RT-PCR.</p><p><b>RESULTS</b>AR models were established successfully in all study guinea pigs. The concentrations of COHb (x(-) +/- s) in plasma of the second group (2.27% +/- 1.13%) were significantly (q = 4.10, P < 0.01) higher than those of healthy controls (1.08% +/- 0.24%). The plasma concentration of COHb in the third group (3.17% +/- 0.68%) were also significantly higher (q = 3.12, P < 0.05) than those in the second group. The expression levels of HO-1 and iNOS in nasal mucosa of the second group [(7.80 +/- 1.60) x 10(-3) and (5.81 +/- 0.05) x 10(-3), respectively] were also significantly (q equals 5.52 and 7.21, respectively, P < 0.01) higher than those of controls [(1.96 +/- 0.71) x 10(-3) and (0.97 +/- 0.05) x 10(-3), respectively]. The expression levels of HO-1 and iNOS in the nasal mucosa of the third group [(11.89 +/- 4.78) x 10(-3) and (7.42 +/- 0.70) x 10(-3), respectively] were significantly (q equals 3.86 and 2.22, P < 0.05) higher than those of the second group. The expression levels of HO-1 and iNOS in nasal mucosa of the fourth group [(3.82 +/- 0.98) x 10(-3) and (2.34 +/- 0.04) x 10(-3), respectively] were significantly (q equals 3.76 and 5.18, P < 0.05) lower than those in the second group.</p><p><b>CONCLUSIONS</b>Endogenous carbon monoxide influenced the expression levels of iNOS in nasal mocusa in guinea pigs with AR.</p>

Effect of tongmal recipe on atherosclerosis in patients with early lower extremity arteriopathy caused by type 2 diabetes mellitus / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of Tongmai Recipe (TMR) on atherosclerosis (AS) in patients with early lower extremity arteriopathy disease (LEAD) caused by type 2 diabetes mellitus (T2DM).</p><p><b>METHODS</b>Patients were randomly assigned to two groups. The 23 patients in the treatment group were treated by TMR and the 22 in the control group were given Cilostazo, all for 3 months. Before and after treatment, lower extremity vascular color Doppler image, blood levels of glucose, insulin, serum matrix metalloproteinase-9 (MMP-9) and interleukin-6 (IL-6) were measured.</p><p><b>RESULTS</b>The thickness of AS plaque and that of arterial intima-media obviously reduced (P < 0.01 and P < 0.05), insulin sensitivity improved noticeably (P < 0.01), and serum levels of MMP-9 and IL-6 lowered obviously (P < 0.05) in the treatment group after treatment, but these indexes were unchanged in the control group statistically.</p><p><b>CONCLUSION</b>TMR has remarkable action in reducing the thickness of AS plaque and intima-media of artery, its mechanism might be related with improving of insulin sensitivity and anti-inflammatory reaction, and reducing of serum MMP-9 level as well in patients.</p>

Review of clinical and experimental studies on treatment of atherosclerosis with expelling phlegm and relieving blood stasis principle / 中国中西医结合杂志

Atherosclerosis (AS) is one of the most essential factors to cause cardio-cerebrovascular diseases. Abundant experience has been acquired in treatment of AS by traditional Chinese medicine (TCM) with its own distinctive diagnostic and therapeutic principles. To expell phlegm and relieve blood stasis, a hot topic of TCM therapeutic principle for AS, is reviewed in this paper.