Identification of components and metabolites of Zhidong Granule in rats plasma and urine by UPLC-Q-TOF-MS / 中草药

Objective: To investigate the prototype components and metabolites of Zhidong Granule in rats plasma and urine by UPLC-Q-TOF-MS. Methods: The analysis was carried out on a Waters UPLC HSS T3 (2.1 mm × 150 mm, 1.8 μm) column, with the mobile phase of 0.1% formic acid solution (A)-acetonitrile (B) at a flowing rate of 0.3 mL/min, the column temperature was 35 ℃. Electrospray ionization (ESI) source was applied and operated in both positive and negative ion mode. Results: A total of 45 components, including 28 prototype components and 17 metabolites, were identified by comparing their retention time, ion fragmentation information with that of the blank biological samples, herb extract, and reference compounds. Conclusion: This experimental method is simple and reliable, which can provide theoretical basis for elucidating the bioactive components of Zhidong Granule.

Clinical significance of inflammatory factors in severe EV71 hand-foot-and-mouth disease / 中国感染控制杂志

Objective To investigate the clinical significance of 5 kinds of inflammatory factors (MCP 1,IL 1β,IL-18,HMGB1,and IL-10) in severe EV71 hand-foot-and-mouth disease (HFMD).Methods Hospitalized children who were diagnosed with severe EV71 HFMD in a hospital in March August,2014 were as HFMD group,healthy children who underwent physical examination in outpatient department of the same hospital during the sameperiod were as control group,changes in expression levels of peripheral blood MCP-1,IL-1β,IL-18,HMGB1,and IL-10 of both groups were dynamically observed,clinical data of HFMD group were collected.Results There were 102 children in HFMD group,the average age was (2.18 ± 0.91) years old,80.39％ of whom were ≤3 years old;there were 77,16,and 9 cases in HFMD group at stage 2,3,and 4 respectively at admission.77,52,21,and 88 cases went through stage 2,3,4,and 5 respectively.Expression levels of 5 kinds of inflammatory factors at stage 2,3,and 4 in HFMD group were compared respectively with control group,differences were all statistically significant(all P＜0.05);expression levels of IL-10 at stage 3 and 4 in HFMD group were not significantly different (P＞0.05).In HFMD group,the expression levels of HMGB1 of stage 2,3 progression groups were both higher than recovery group(both P＜0.05).The expression levels of 5 kinds of inflammatory factors in the death group and survival group at admission were all significantly different (all P＜0.05).Conclusion The expression levels of MCP 1,HMGB1,IL-1β,IL-10,and IL-18 are closely related to the severity of HFMD,and has certain clinical significance for the prognosis of children.HMBG1 has certain predictive value in the prognosis of HFMD.

Frequency Distribution Features of Innate-like Lymphocytes in Peripheral Blood of Normal Adults / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the frequency distribution features of innate-like lymphocytes (iNKT cells, γΔT cells and B1 cells) in peripheral blood of normal adults.</p><p><b>METHODS</b>The flow cytometry with 6 fluorescence staining was used to detect the percentages of iNKT lymphocytes, γΔT lymphocytes, B1 lymphocytes and adaptive T lymphocyte, B2 lymphocytes in peripheral blood lymphocytes of 50 normal adults. The difference and correlation between these lymphocyte subsets were analyzed by statistical software.</p><p><b>RESULTS</b>The percentage of iNKT cells in peripheral blood of 50 normal adults was 0.18% (0.01%-2.01%), the percentage of γΔT cells was 4.90% (1.45%-20.14%), the percentage of B1 lymphocytes was 1.62% (0.20%-3.77%), the percentage of adaptive T cells was 63.52% (33.20%-83.22%), the percentage of B2 cells was 6.64% (3.07%-13.80%). B1 and B2 were two subsets of B lymphocyte, the percentage of B2 in B lymphocyte was 81.43% (57.90%-94.12%) and more than that of B1 lymphocyte; the percentage of B1 lymphocytes was 17.28% (5.28%-41.13%). In T lymphocyte group the percentage of iNKT cell was 0.32% (0.01%-3.6%), the percentages of γΔT cells and adaptive T cells were 7.55% (3.04%-27.66%) and 91.98% (72.22%-96.86%) respectively. Spearman correlation analysis was used to analyze the correlation between the percentages of several lymphocyte subsets. There was a positive correlation between iNK T cells and γΔT cells, γΔT cells and adaptive T cells, B1 cells and B2 cells (r=0.39, P=0.0056; r=0.6028, P<0.0001; r=0.4791, P=0.0004). It was also found that the percentage of iNKT cells in female peripheral blood lymphocytes was 0.29% (0.06%-2.01%), and significantly higher than that in male peripheral blood lymphocytes 0.12% (0.01%-1.37%) (P<0.05).</p><p><b>CONCLUSION</b>The percentages of γΔT cells, B1 cells and iNKT cells in peripheral blood lymphocytes of normal adults are significantly lower than that of adaptive lymphocytes, and their contents in peripheral blood decrease in turn. There are no sex differences in the percentages of these lymphocyte subsets except iNKT cells.</p>

Synthesis and activity of ACE inhibitory peptides / 药学学报

To find anti-hypertensive lead drug, angiotensin converting enzyme (ACE) inhibitory peptides were synthesized and their effects on inhibiting ACE activity were investigated. ACE inhibitory peptides were synthesized via Fmoc solid-phase synthesis, isolated and purified through reversed phase high-performance liquid chromatography (RP-HPLC), and identified by mass spectrometry. A RP-HPLC analysis method was used to test ACE inhibitory activity in vitro of these ACE inhibitory peptides. Six octapeptides were successfully synthesized, and the analytical results of mass spectrum were consistent with their theoretically calculated data. Among these synthetic octapeptides, the anti-SARS (severe acute respiratory syndromes) octapeptide had the most obvious ACE inhibitory activity with an IC50 value of 3.4 x 10(-5) mol x L(-1). So octapeptide AVLQSGFR-OH (anti-SARS peptide) was found to be the strongest candidate for potential development as an anti-hypertensive drug and had the implication of further study.