Effect of traditional Chinese medicine in attenuating chronic kidney disease and its complications by regulating gut microbiota-derived metabolite trimethylamine N-oxide: a review / 中国中药杂志

Trimethylamine N-oxide(TMAO), a metabolite of gut microbiota, is closely associated with chronic kidney disease(CKD). It can aggravate the kidney injury and promote the occurrence of complications of CKD mainly by inducing renal fibroblast activation, vascular endothelial inflammation, macrophage foaming, platelet hyperreactivity, and inhibition of reverse cholesterol transport. Thus it is of great significance for clinical treatment of CKD to regulate circulating TMAO and alleviate its induced body damage. Currently, therapeutic strategies for TMAO regulation include dietary structure adjustment, lifestyle intervention, intestinal microflora regulation, and inhibition of intestinal trimethylamine synthesis and liver trimethylamine oxidation. Chinese medicinal herbs have the clinical advantage of multi-component and multi-target effects, and application of traditional Chinese medicine(TCM) to synergistically regulating TMAO and improving CKD via multiple pathways has broad prospects. This study systematically reviewed the clinical relevance and mechanism of TMAO in aggravating CKD renal function deterioration and complication progression. In addition, the effect and mechanism of TCM in improving TMAO-induced kidney injury, cardiovascular disease, hyperlipidemia, thrombosis and osteoporosis were summarized. The results provided a theoretical basis for TCM in attenuating gut microbiota-derived metabolite TMAO and improving CKD, as well as a basis and direction for in-depth clinical development and mechanism research in the future.

Establishing the Blood Donor Deferral Criterion in TP ELISA Test / 中国实验血液学杂志

OBJECTIVE@#To Establish the shielding threshold value of TP antibody ELISA for unpaid blood donors, so as to shield true positive blood donors from returning to team management.@*METHODS@#The real serological status of 517 samples with anti-TP ELISA reactivity was determined by confirmation test of Treponema pallidum particle agglutination (TPPA). The shielding threshold of TP antibody was preliminarily determined by using 99% specificity of ROC and 95% positive predictive value of percentile method, respectively. 283 TP antibody reactivity specimens routinely tested in our laboratory were selected to determine the applicability of the initial shielding values obtained by the two methods, and finally to determine the shielding threshold values of TP antibody donors.@*RESULTS@#The specific S/CO values of reagent A 99% were 13.33-16.18, that of reagent B 99% was 6.34, that of reagent B 99% was 13.17-19.85, and that of 95% was 6.62. Empirical evidence: 99% specific threshold shielding true positive rates of reagents A and B were 100%, 95% positive expected value shielding true positive rates were 98.4%, 99%. Final determination of 99% specific shielding threshold as a low value of blood donors shielding threshold. The shielding limits of reagent A and B were 13.33 and 13.17.@*CONCLUSION@#The shielding threshold of TP antibody ELISA for blood donors established in this study can help to reduce the number of blood donors returning to team management.

Evaluation of the Cutoff of Anti-HCV Antibody Enzyme-Linked Immunosorbent Assay in 7 Blood Station Laboratories / 中国实验血液学杂志

OBJECTIVE@#To evaluate the necessity and suitability of the anti-HCV ELISA teot gray zone setted up by 7 blood station laboratories.@*METHODS@#7 blood station laboratories were coded as 1, 2, 3, 4, 5, 6 and 7 respectively; 8 kinds of ELISA reagents were coded as A, B, C, D, E, F, G and H respectively. 1 or 2 of 8 ELISA reagents produced by different manufactories were used to detect the anti-HCV in specimens of same group by 7 blood station laboratories; the Westen blot was used to detect the specimens with difference of detected results so as to difine the serological status of specimens. The true positive rate of specimens detected by laboratories and gray zone-comfirined positive rate of specimens were accounted so as to analyze the necessity of setting up the gray zone for anti-HCV ELISA test of 7 blood station laboratories; the optimal cut-off value for anti-HCV ELISA test was determined in 7 blood station laborafories by ROC curve and the changes of sensitivity and specificity of 3 different cut-off value(laboratory work cut-off value, manifactory-recommended cun-off value and optimal cut-off value) were compared so as to analyze the suitability of gray zone for anti-HCV ELISA test in 7 blood station laboratories.@*RESULTS@#The true positive rate detected by 7 blood station laboratories, out of which coded 1 laboratory used 2 kinds of coded A, B reagents was 95.40%(1A), 99.23% (1B), 94.25% (2C), 96.17% (3D), 98.08% (4E), 96.93% (5F), 97.32%(6G) and 93.10%(7H). Except for 2C(94.25%) and 7H(93.10%), the true positive rate detected by laboratoies which not sutted up gray zone, the gray zone-con-firmed positive rate in 6 blood station laboratories setted up gray zone: was 0.00%, 0.00%, 21.43%, 0.00%, 0.00%, 0.00% and 38.89%. The comparison of 3 different cut-off valuces by ROC curve showed that the anti-HCV cut-off values in 5 laboratories(1B, 2C, 4E, 5F and 6G) were as follows: optimal cut-off value＞manufactory recommeded cut-off value＞laboratory work cut-off value, thus use of manufactory-recommeded cut-off value abreadly has reached the high sensitivity requinements for laboratory screening; however, the optimal cut-off value in laboratories 1A, 3B and 7H, thas the appropriate gray zone should be used. In 6 laboratories setting up gray zone, the gensitivity in 3D, 7H laboratories only a little improved (1.60% and 2.70% raspectively) in Eamparison between laboratory work cut-off value and manufactorg-recommeded cut-off value; moreover, the sensitivity in other laboratories not is changed, but the specificity decreased (0.20%-0.50%).@*CONCLUSION@#In addition to setting up the appropriate gray zone in laboratories 1A, 3D and 5H, the gray zone in other laboratories may be cancelled. Even in the same laboratory, the setting up the gray zone also should be scientifically assessed, the same scale cannot be blindly used, thus appropniate strategies should be established.

Evaluation of the Performance of Two Kinds of Anti-TP Enzyme-Linked Immunosorbent Assay / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To evaluate the accuracy and precision of 2 kinds of anti-treponema pallidum (anti-TP) ELISA reagents in our laboratory for detecting the anti-TP in voluntary blood donors, so as to provide the data support for use of ELISA reagents after introduction of chemiluminescene immunoassay (CLIA).</p><p><b>METHODS</b>The route detection of anti-TP was performed by using 2 kinds of ELISA reagents, then 546 responsive positive samples detected by anti-TP ELISA were collected, and the infections status of samples confirmed by treponema pallidum particle agglutination (TPPA) test was identified. The confirmed results of responsive samples detected by 2 kinds of anti-TP ELISA reagents were compared, the accuracy of 2 kinds of anti-TP ELISA reagents was analyzed by drawing ROC and comparing area under curve (AUC), and precision of 2 kinds of anti-TP ELISA reagents was compared by statistical analysis of quality control data from 7.1 2016 to 6.30 2017.</p><p><b>RESULTS</b>There were no statistical difference in confirmed positive rate of responsive samples and weak positive samples between 2 kinds of anti-TP ELISA reagents. The responsive samples detected by 2 kinds of anti-TP ELISA reagents accounted for 85.53%(467/546) of all responsive samples, the positive rate confirmed by TPPA test was 82.87%. 44 responsive samples detected by anti-TP ELISA reagent A and 35 responsive samples detected by anti-TP ELISA reagent B were confirmed to be negative by TPPA test. Comparison of AUC showed that the accuracy of 2 kinds of anti-TP ELISA reagents was more high, the difference between 2 reagents was not statistically significant. The coefficient of variation (CV) of anti-TP ELISA reagent A and B was 14.98% and 18.04% respectively, which met the precision requirement of ELISA test.</p><p><b>CONCLUSION</b>The accuracy and precision of 2 kinds of anti-TP ELISA reagents used in our laboratory are similar, and using any one of anti-TP ELISA reagents all can satisfy the requirements of blood screening.</p>

Quality evaluation of Linderae Radix from different growing areas / 中成药

AIM To evaluate the quality of Linderae Radix from different growing areas.METHODS Hot dipping method was applied to determining the extract content.HPLC was adopted in the content derermination of linderane,linderalactone and norisoboldine.Then SPSS19.0 software was used for principal component analysis.RESULTS The effect degrees of various index components were in sequence of extract ＞ norisoboldine ＞ linderalactone ＞ linderane.The accumulative contribution rate of the first two principal components (total content of four index components,extract content) reached 86.86％.The comprehensive score of Linderae Radix from Taizhou (Zhejiang) was the highest.CONCLUSION Taking Taizhou (Zhejiang) as the genuine producing area of Linderae Radix has a certain scientific basis.

Quality evaluation of Linderae Radix from different growing areas / 中成药

AIM To evaluate the quality of Linderae Radix from different growing areas.METHODS Hot dipping method was applied to determining the extract content.HPLC was adopted in the content derermination of linderane,linderalactone and norisoboldine.Then SPSS19.0 software was used for principal component analysis.RESULTS The effect degrees of various index components were in sequence of extract ＞ norisoboldine ＞ linderalactone ＞ linderane.The accumulative contribution rate of the first two principal components (total content of four index components,extract content) reached 86.86％.The comprehensive score of Linderae Radix from Taizhou (Zhejiang) was the highest.CONCLUSION Taking Taizhou (Zhejiang) as the genuine producing area of Linderae Radix has a certain scientific basis.

Selection of Human Cytomegalovirus Screening Target Population in Voluntary Blood Donors in Beijing City of China / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To find a group of the highest proportion of HCMV antibody negative among the voluntary blood donors in Beijing, and to establish a database for the special clinical blood needs.</p><p><b>METHODS</b>The blood samples were collected from 2518 eligible donors who were randomly selected according to the national compulsory blood screening programs, the HCMV-IgG antibody were detected by using enzyme linked immunosorbent assay (ELISA). According to blood donors of different sex, age, educational degree, born area, the results of detection were analyzed and compared.</p><p><b>RESULTS</b>The HCMV-IgG antibody negative rate of eligible blood donors in Beijing was 10.68% (269/2518). According to the different sex, the HCMV-IgG antibody negative rate was 11.84% (210/1774) for men, and was 7.93% (59/744) for women. In comparsion with different ages, the HCMV-IgG antibody negative rate of 18-25 years old men was 13.51% (181/1340), the HCMV-IgG antibody negative rate of 26-30 year old men was 8.68% (62/714), the HCMV-IgG antibody negative rate of 31-35 year old men was 5.60% (26/464). Along with the age growth, the HCMV-IgG antibody negative rate gradually decreased. In comparison with different born area, the HCMV-IgG antibody negative rate was the highest in area of Beijing and Tianjin (18.59%, 50/269). In comparison with different educational levels, the HCMV-IgG antibody negative rate was the highest in men who have achieved bachelor or above (13.52%, 86/636).</p><p><b>CONCLUSION</b>The HCMV antibody screening in the Beijing voluntary blood donors needs to select the 18-25 year old male population whose educational level have achieved bachelor or above. The organization or establishment of this group can provide a base for HCMV antibody screening strategy.</p>