New Phenolic Glycosides and Lignans from the Roots of Lilium dauricum

Three new phenolic glycosides, carvacrol-2-O-β-D-apiofuranosyl-(1 → 6)-β-D-glucopyranoside (1), 1-methyl-3-isopropylphenol-4-O-β-D-apiofuranosyl-(1 → 6)-β-D-glucopyranoside (2), p-methoxythymol-5-O-β-D-apiofuranosyl-(1 → 6)-β-D-glucopyranoside (3), and a pair of new 8-O-4′ neolignan enantiomers (5a/5b), together with 26 known compounds (4, 6 – 30) were isolated from the roots of Lilium dauricum. The structures of the new compounds were elucidated based on extensive spectroscopic and chemical methods, and the absolute configurations of 5a and 5b were established by electronic circular dichroism analysis. Nine compounds (1, 3, 4, 8, 9, 17, 25, 29, and 30) exhibited potent α-glucosidase inhibitory activity with IC50 values ranging from 73.4 µM to 988.2 µM. Besides, compound 19 displayed strong anticomplementary activity (CH50: 71.6 µM).

Evaluation of the Stability of Performance of the Analytical Test Method Used for Determination of Anticomplementary Activity of Human Immunoglobulin Preparations

The evaluation of anticomplementary activity, being an obligatory component of the quality control ofhuman immunoglobulin preparations, requires the use of a number of reagents of biological origin that are difficult to standardise. In order to standardise the quality control method used for determination of antiсomplementary activity it is advisable to use a reference standard which demonstrates whether obtained results comply with the acceptance criteria, and helps to assess the stability of analytical performance. The aim of the study was to assess the stability of analytical performance of the test procedure used for determination of antiсomplementary activity of human immunoglobulin preparations using human immunoglobulin reference standards of various grades. Materials and methods: anticomplementary activity was determined by the complement fixation test in accordance with the general monograph of the State Pharmacopoeia of the Russian Federation (14th ed.) OFS.1.8.2.0007.15 using different batches of guinea pig complement and sheep red blood cells. The test procedure was standardised using the OSO 42-28-430-2018 human immunoglobulin reference standard and the human immunoglobulin BRP, batch 1 (cat. No. Y0001504). The obtained results of anticomplementary activity of the reference standards were used to construct Shewhart control charts, using the certified values as control limits. Results: the analysis of the constructed Shewhart charts helped to assess trends, and estimate the influence of different batches of guinea pig complement and sheep red blood cells on the stability of analytical performance of the test procedure used for determination of antiсomplementary activity of human immunoglobulin preparations. Conclusions: the use of the OSO 42-28-430-2018 reference standard in combination with Shewhart control charts for the quality control of human immunoglobulin preparations in terms of Anticomplementary activity makes it possible to control the testing process, and assess any of its changes associated with the replacement of the batch of the reagent. At the same time, the reference standard of the European Pharmacopoeia, which has a wide range of permissible values, can only be used to confirm the acceptance of the results. Further studies to determine the mean value of the anticomplementary activity of control samples, as well as the standard deviation, may increase the possibilities of using this reference standard for assessment of analytical performance stability.

ПОКАЗНИКИ АНТИЛІЗОЦИМНОЇ ТА АНТИКОМПЛЕМЕНТАРНОЇ АКТИВНОСТІ МІКРООРГАНІЗМІВ ДИСТАЛЬНОГО ВІДДІЛУ КИШЕЧНИКА ПОРОСЯТ ЗА ЗМІШАНОЇ НЕМАТОДОЗНО-ПРОТОЗООЗНОЇ ІНВАЗІЇ

The article deals with the results of search of the influence of intestinal parasites on the indicators of antilysozyme and anticomplementary activity of microorganism of distal department of intestine. It was established, that the products of intestinal parasites of pigs reduce anti lysozyme activity of such obligate anaerobes as Bifidobacterium spp. to 42.1% (р < 0.01), Prevotella spp. to 14.3%, Clostridium spр. to 66.7% (р < 0,001). With MAFAnM to 38.5% (р < 0.05) in Lactobacillus spp. and to 50.0% (р < 0.01) in Streptococcus spp. Higher compared with the control, antilysozyme activity was in Bacteroides spp. (р < 0.05), Eubacterium spp. (р < 0,001), Propionіbacterium spp. (р < 0.01), Peptostreptococcus spp. (р < 0.05), Fusobacterium spp. (р < 0.01), E. coli lact. «+» hem «-» (р < 0.05), Klebsiella spp. (р < 0.001), Citrobacter spp. (р < 0.01), Enterococcus spp. (р < 0.05), Staphylococcus spp. (р<0.001), Candida spp. (р<0.001) abstracted from the distal intestine of pigs affected with mixed nematodosis - protoozic invasion. With the action of products of vital functions of ascarices, eymeria and balantides, the anticomplementary activity significantly increases in Prevotella spp. (р < 0.01), Clostridium spр. (р < 0.001), Eubacterium spp. (р < 0.001), Propionіbacterium spp. (р < 0.001), Peptostreptococcus spp. (р < 0,001), Fusobacterium spp. (р < 0.001), Lactobacillus spp. (р < 0.05), E. coli lact. «+» hem «-» (р < 0.01), E. coli lact. «-» hem «+» (р < 0.001), Klebsiella spp. (р < 0.05), Enterobacter spp. (р < 0.001), Enterococcus spp. (р < 0.001), Streptococcus spp. (р < 0.001) and only in Bacteroides spp. it was significantly lower (р < 0.001), compared with the control.