Effect of Shenwu Yishenpian on Renal Interstitial Fibrosis and Micro-inflammatory State in Chronic Kidney Disease 4-5 Stage / 中国实验方剂学杂志

Objective:To discuss the efficacy and safety of Shenwu Yishenpian on stage 4-5 chronic kidney disease-nondialysis （CKD） with deficiency of spleen and kidney Qi， and the effect on renal interstitial fibrosis （RIF） and microinflammation. Method:One hundred and twenty patients were randomly divided into observation group and control group. A total of 58 patients in control group completed the treatment （including 2 patients falling off or lost）. And 58 patients in observation group completed the treatment （including 1 patient was falling off or lost visit， and 1 eliminated）. Both groups got comprehensive treatment of western medicine. Patients in control group got simulated medicine of Shenwu Yishenpian， 4 pieces/time， 3 times/day. Patients in observation group got Shenwu Yishenpian， 4 pieces/time， 3 times/day. The treatment lasted for 6 months until the renal replacement therapy， and the 6-month follow-up was recorded. For every month， blood creatinine （SCr） was detected， and glomerular filtration rate （eGFR） were calculated. The 12-month renal replacement （dialysis or kidney transplantation）， progress （CKD4 to CKD5） and mitigation （CKD5 to CKD4 or CKD4 to CKD3） were recorded. Before and after treatment， levels of urea nitrogen （BUN）， hemoglobin （HB）， plasma albumin （ALB）， urine protein quantity （24 hUp） and blood uric acid （UA） levels were detected， deficiency of spleen kidney Qi was scored， and transforming growth factor-β1 （TGF-β1）， connective tissue growth factor （CTGF）， serum Klotho， tumor necrosis factor-α （TNF-α）， interleukin-6 （IL-6）， interleukin-1 （Lkn-1） and interleukin-12 （IL-12） were detected. And the safety was evaluated. Result:At the 3th and 6th after treatment， SCr in two groups increased （P<0.01）， while eGFR decreased （P<0.01）. Compared with control group， SCr was less than that in control group （P<0.01）， whereas eGFR was higher than that in control group （P<0.01）. During 12 months of observation， the reduction rate of CKD was 13.79% （8/58）， which was higher than 1.72% （1/58） in control group. The progress rate of CKD was 11.43% （4/35）， which was lower than 31.58% （12/38） in control group （P<0.05）. Levels of BUN， 24 hUp and UA were lower than those in control group （P<0.01）， while levels of Hb and ALB were higher than those in control group （P<0.01）. Effect in observation group was better than that in control group （Z=2.051， P<0.05）. And levels of TGF-β1， CTGF， TNF-α， IL-6， Lkn-1 and IL-12 were lower than those in control group （P<0.01）， and level of Klotho was higher than that in control group （P<0.01）. There was no adverse reaction relating to Shenwu Yishen Pian. Conclusion:Shenwu Yishenpian can delay the progress of renal function and CKD， reverse the progress of renal function in some patients， reduce the risk factors of disease progress， reduce the state of micro inflammation and resist RIF， and protect or improve renal function. Its clinical effect is better than placebo， and it is safe to use.

Binding characteristics of plasma protein in active parts of Daidai lipid-lowering flavonoid extract / 中国中药杂志

To study the binding capacity of active ingredients of Daidai lipid-lowering flavonoid extract and plasma protein,investigate the ways to improve the traditional formula for calculating protein binding rates based on ultrafiltration,and increase the stability and reliability of the experimental results. UPLC-MS/MS was used to establish a quantitative analysis method for simultaneous determination of active ingredients( neohesperidin and narngin) in ultrafiltrate. The protein binding rates were calculated by the traditional ultrafiltration formula. The correction factors( F) were introduced later,and the binding rates calculated with the correction factors were compared with those without the correction factors. The binding capacity of the extract and plasma protein was evaluated. The quantitative analysis method established by UPLC-MS/MS had a good specificity. The standard curve and linear range,method accuracy,precision and lower limit of quantitation all met the requirements. The method met the requirement for quantitative detection of the active ingredients in ultrafiltrate after the rat plasma was filtrated in the ultrafiltration tube. Under the experimental conditions,the binding rates of both active ingredients( neohesperidin and narngin) were higher than 90%. The active ingredients and rat plasma protein were bound in a concentration-dependent manner,with statistically significant differences( P<0. 01). There was no statistically significant difference between the protein binding abilities of the two active ingredients with rat plasma protein. Therefore,the active ingredients of Daidai lipid-lowering flavonoid extract had a relatively strong binding strength with rat plasma protein,and they were bound in a concentration-dependent manner. Additionally,when calculating protein binding rates by the traditional ultrafiltration formula,the correction factors could be introduced to effectively reflect the errors of multiple ingredient groups in traditional Chinese medicine extracts.This correction method could provide a reference thinking and practical reference for the improvement of the determination method of the traditional Chinese medicine plasma protein binding ability based on ultrafiltration.

Metabolic characteristics of active parts of lipid-lowering flavonoid extract of Daidai in liver and intestinal microsomes of rats / 中国中药杂志

The paper studies and compares the metabolic difference of active ingredients of lipid-lowering flavonoid extract of Daidai in rat livers and intestinal microsomes,in order to explore the phase Ⅰ metabolism characteristics of active ingredients in livers and intestines. UPLC-MS/MS was used to establish a quantitative analysis method for active ingredients,neohesperidin and narngin,in a phase Ⅰ metabolism incubation system of liver and intestinal microsomes. Differential centrifugation was used to make liver and intestinal microsomes of rats. A phase Ⅰ metabolism incubation system was established,and the concentrations of the residual at different incubation time points were analyzed. Graphs were plotted to calculate the metabolic elimination half-life of the main active parts,with the natural logarithm residual percentage values ln( X) at different time points as the y axis,and time t as the x axis. The metabolism characteristics of the active ingredients were compared. The established UPLC-MS/MS quantitative analysis method has a good specialization,standard curve and linear range,accuracy and precision,with a satisfactory lower quantitative limit. The method allows quantitative detection of the active ingredients in a phase Ⅰ metabolism incubation system of liver and intestinal microsomes of rats. In the rats liver microsomes incubation system,the metabolic elimination half-life of neohesperidin and narngin were( 2. 20 ± 0. 28) h and( 1. 97±0. 28) h respectively. The elimination half-life of neohesperidin was larger than that of narngin,but with no statistically significant difference. In the rats intestinal microsomes incubation system,the metabolic elimination half-lives of neohesperidin and narngin were( 3. 68±0. 54) h and( 2. 26±0. 13) h respectively. The elimination half-life of neohesperidin was larger than that of narngin,with statistically significant differences( P<0. 05). The elimination half-lives of the active ingredients in liver microsomes were smaller than those in intestinal microsomes. The experiment results showed that the active ingredients of lipid-lowering flavonoid extract of Daidai had different elimination half-lives in phase Ⅰ rats liver and intestinal microsomes incubation system. This implied that they had different metabolic characteristics in rats liver and intestine,and liver may be the main metabolism site of the active ingredients. The phaseⅠ metabolism of narngin was stronger than that of neohesperidin. The differences between their metabolic characteristics may be related to the binding sites of B-ring hydroxyl in flavonoid glycosides and the number of methoxyl group. The results provided an important experimental basis for further development and clinical application of lipid-lowering flavonoid extract preparation of Daidai.

Evaluation of NR2B peptide as subunit vaccines against experimental neuropathic pain / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>NR2B containing N-methyl-D-aspartate (NMDA) receptor plays an important role in the facilitation and maintenance of neuropathic pain. The discrete distribution of NR2B subunit in the central nervous system (CNS) may support reduced side effects of agents that act selectively at this site. Therefore, we investigated the hypothesis that a humoral autoimmune response targeting the NR2B subunit of NMDA receptor relieves pain like behaviours produced by peripheral injury.</p><p><b>METHODS</b>Rats were immunized subcutaneously with NR2B-Keyhole Limpet Hemocyanin (NR2B-KLH) three times at two-week intervals. NR2B specific IgG titres in sera and cerebrospinal fluid were determined by indirect ELISA. Seven days after the third immunization, 2 of the 3 terminal branches of the sciatic nerve (tibial and common peroneal nerves) were tightly ligated. Behavioural testing was carried out on every other day after surgery, until 7 days after surgery. The lumbar spinal cord (L4-6) was removed on day 7 after ligation. The expression of NR2B protein in the lumbar spinal cord was determined using Western blotting.</p><p><b>RESULTS</b>After the second vaccination, NR2B specific IgG in sera was detected to be > 0.5 microg/ml in six of nine rats. After the third vaccination, all the immunized rats had > 2.2 microg/ml. Titres of NR2B specific IgG in sera peaked 42 days post initial immunization and persisted for over 70 days. No NR2B specific IgG was detected in sera from PBS or KLH group. The behavioural thresholds in NR2B group were significantly higher than those in PBS and KLH groups on day 7 after ligation. NR2B specific IgG in CSF in NR2B group could not be detected on day 1 before spinal dissection; but could be detected on day 7 after surgery. The expression of NR2B protein in group NR2B was significantly lower than in PBS and KLH groups on day 7 after surgery.</p><p><b>CONCLUSION</b>The NR2B peptide could be used as a vaccine against neuropathic pain, which could be associated with reduction of NR2B protein in the lumbar spinal cord.</p>