ABSTRACT
In obesity,insulin resistance (IR) in visceral adipose tissue is closely associated withmetabolic disease.The interaction between acquired immune cells,including T lymphocytes and B lymphocytes,and innate immune cells affects adipocyte function,contributesto the development of adipose tissue inflammation and IR.Here,we summarized the influence of acquired immune cells on adipose tissue inflammation and IR,providing a new direction and strategy for obesity-related.disease.
ABSTRACT
The randomized controlled trials (RCTs) of treating diabetic nephropathy (DN) with alprostadil and valsartan were collected from CNKI,Wan fang date,VIP,PubMed,Embase,and Cochrane Library.The selected data was analyzed with RevMan 5.1 software.The effect of combination of valsartan and alprostadil in treating DN was evaluated.In 19 RCTs,675 cases were co-treated with alprostadil and valsartan and 670 were treated with valsartan.The results indicated that 24 h urine microalbumin excretion [WMD =-53.23,95％ CI (-67.55,-38.91),P＜0.01] and24 h urine protein[WMD=-0.38,95％ CI(-0.69,-0.07),P=0.02] in patients treated with combination of valsartan and alprostadil were reduced more markedly than in those treated with valsartan alone.There was no significant difference in blood urea nitrogen [WMD =-0.791,95 ％ CI (-20.62,4.79),P =0.22] and serum creatinine[WMD=-5.82,95％ CI(-19.22,7.58),P=0.39] between two kinds of treatment.These results suggest that combined treatment with valsartan and alprostadil shows advantageous effect on reducing urinary protein in DN.
ABSTRACT
OBJECTIVE To explore the effect and underlying mechanism of promethazine(PMZ) on proarrhythmia in guinea pigs. METHODS ① InvivoECG recordings were made to analyze effects of jugular intravenous(iv)injection of PMZ on ECG in guinea pigs. PMZ was injected in this order:3.83→7.67→15.33→38.33 mg·kg-1 cumulatively. ② In vitroECG recordings were made to analyze effects of PMZ on ECG in isolated hearts of guinea pigs. PMZ was perfused in such order:0. 1 → 1 → 10 →50 μmol·L-1 . ③ L-type Ca2+ currents from ventricular myocytes in guinea pigs were recorded to investi-gate the PMZ's blocking effect. PMZ was perfused in such order:0.1→1→10→50 μmol·L-1→washout.④ hNav1.5 and hERG currents were recorded to investigate the PMZ's blocking effects. PMZ-perfused in such order:1→3→10→30 μmol·L-1 for hNav1.5 current analysis,and 0.3→1→3→10 μmol·L-1 for hERG current analysis. RESULTS ① PMZ(15.33 mg·kg-1 )significantly prolonged QRS intervals in guinea pigs invivoECG(P﹤0.05). PMZ(38.33 mg·kg-1 )prolonged QRS,QTc,and P-R intervals but reduced the heart rate( P﹤0.05). PMZ(10 μmol·L-1 )reduced the heart rate of isolated guinea pig hearts. PMZ 50 μmol·L-1 prolonged QRS and QTc intervals and further reduced the heart rate(P﹤0.05).③ PMZ inhibited the L-type Ca2+ current from ventricular myocytes in guinea pigs in a concentration-dependent manner with the lC50 of(8.9±1.0)μmol·L-1 . ④ PMZ inhibited the hNav1.5 and hERG currents in a concentration-dependent manner with the lC50 of 6.1±1.5 and(1.6±0.2)μmol·L-1 ,respectively. CONCLUSION PMZ might cause arrhythmia at overdoses and incombination with other drugs which have potential blocking effect on /Na ,Ca2+ and /kr currents. The proarrhythmic effect of PMZ might be mediated by the blocking effect on /Na ,Ca2+ and /kr currents.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of berberine on serum levels of TNF-alpha, IL-6 and adiponectin in obese mice induced by high fat diet and its potential molecular mechanisms.</p><p><b>METHOD</b>Normal male Kunming mice were randomly divided into two groups taking normal chow (NC, n = 10) and high fat diet (HF, n = 30), respectively. After 13 weeks, HF mice were continuously given high fat diet and divided into three groups, model group (BM), low-dosage of berberine group (BL) and high-dosage of berberine group (BH). Mice in BL and BH were administered berberine by gavage at the dosage of 50 mg x kg(-1) and 150 mg x kg(-1), respectively. Two weeks later, oral glucose tolerance test was performed. At the end of the experiment, the mice were killed and blood samples were collected. The epididymal fat tissue and liver were removed promptly and weighed. The serum cytokine was measured by ELISA. The levels of IkappaB kinase beta (IKK-beta) and IKK-beta (ser181) were detected by Western blotting.</p><p><b>RESULT</b>Serum levels of TNF-alpha, IL-6 in mice of BM were significantly higher than those in NC (P < 0.05). After two-week treatment of berberine, serum levels of TNF-alpha, IL-6 in BL and BH were lower than those in BM (P < 0.05, respectively). However, there were no significant difference of adiponectin among four groups. The degrees of phosphorylation of IKK-beta (ser181) were decreased in liver and adipose tissue in BH in comparison to that in BM, although the expression of total IKK-beta did not change. Furthermore, the glucose tolerance was improved, while the body weight and epididymal fat were reduced in mice treated with berebrine. 9: Berberine is able to reduce inflammatory cytokines expression and inhibit activation of IKK-beta (ser181) in obese mice, which may partly explain the therapeutic effect of berberine on insulin resistance and abnormal glucose metabolism.</p>