Animals ; Materia Medica ; pharmacology ; Medicine, Chinese Traditional ; Oligochaeta

Air Pollutants, Occupational ; analysis ; Guanidines ; analysis ; Humans ; Occupational Exposure ; analysis ; Threshold Limit Values ; Workplace

Animals ; Cardiovascular Diseases ; genetics ; pathology ; Cell Proliferation ; Genes ; Microfilament Proteins ; genetics ; Muscle Proteins ; genetics ; Muscle, Smooth, Vascular ; pathology ; Rats

Adolescent ; Child ; Female ; Glomerulonephritis, IGA ; diagnosis ; pathology ; Humans ; Male ; Prognosis

Alkanes ; toxicity ; Animals ; Chromosome Aberrations ; Mice ; Mice, Inbred ICR ; Micronucleus Tests ; Mutagenicity Tests ; Mutagens ; Rats ; Rats, Sprague-Dawley ; Teratogens

Biphasic dissolution test, consisting of immiscible aqueous and organic phase, is an in vitro dissolution method that simultaneously measures the dissolution and partition of drugs. Due to the advantages of simulating in vivo absorption and overcoming the influence of surfactants on dissolution, it has been widely used to evaluate the poorly soluble drugs in vitro dissolution. Based on the relevant research in this field in recent years, this review summarizes the history, dissolution device, theoretical model and application of the biphasic dissolution test. Finally, the prospects in the development of biphasic dissolution test are also outlined.

Objective: To make full usage of resource and turn waste into treasure, the chemical constituents and bioactivity were firstly investigated on Damask rose (Rosa damascena) flower residue (DRFR). Methods: DPPH and ABTS experiments were applied to assess the antioxidant activity of DRFR. Then, column chromatography was used to purify compounds from an antioxidation extract (DRFR-A), and the chemical structure was identified using NMR. The total phenolic acid content was measured by Folin-Ciocalteu colorimetric method, and the content of gallic acid of the indicator ingredient was detected by HPLC. Results: DRFR-A was found to show a high activity both on DPPH (IC50: 2.760 µg/mL) and ABTS (IC50: 2.258 µg/mL) compared to positive control VC. Ten compounds were isolated and identified as quercetin (1), kaempferol (2), gallic acid (3), protocatechuic acid (4), pyrogallic acid (5), 2-phenylethyl 3,4,5-trihydroxybenzoate (6), methyl gallate (7), p-hydroxybenzoic acid (8), p-hydroxyphenethyl alcohol (9) and astragalin (10) from DRFR-A. Among them, pyrogallic acid, 2-phenylethyl-3, 4, 5-trihydroxybenzoate, p-hydroxybenzoic acid and p-hydroxyphenethyl alcohol are obtained from the plant for the first time. The content of total phenolic acids and gallic acid, main ingredient in DRFR-A was determined as 63.73% and 24.67%, respectively. Conclusion: This study provides a reliable data and lays the foundation for the development and utilization of rose residue, and hence for the full utilization of rose resources.

Objective To observe the expression of free Ca2+ and Angiotensin Ⅱ 1 type receptor(AT1 R)in vascular smooth muscle cells(VSMCs)of patients with hypertensive or normotensive coronary artery diseases(CAD).Methods During the coronary artery bypass graft operation,the surplus saphenous vein of patients who admitted to our Cardiac Surgery Department was collected and cultured.All patients were divided into hypertensive or normotensive group.Free Ca2+ in the cultured human VSMCs was determined by confocal laser scanning microscope(CLSM)after different kinds of AngiotensinⅡ being added,respectively.Total RNA was extracted from cultured VSMCs.Then RT-PCR was conducted for the observation of the expression of AT1R in both groups.Results Ca2+in human VSMCs rapidly increased when stimulated by Angtensin Ⅱ in two groups.After stimulated by Angiotensin Ⅱ,both free Ca2+ level and the expression of AT1R in VSMCs of hypertensive patients were higher than those of the normotensive patients(P＜0.05).Conclusion There are certain changes of free calcium in the cultured human vascular smooth muscle cells,when stimulated by Angiotensin Ⅱ.There are also difierences in AT1R expression between hypertensive CAD patients and normotensive CAD patients.

Glycyrrhiza uralensis Fisch. ex DC is widely used in traditional Chinese medicine (TCM). Among its various active components, glycyrrhizic acid is believed to be the marker component. Squalene synthase (SQS) and beta-amyrin synthase (beta-AS) are key enzymes in the biosynthetic pathway of glycyrrhizic acid in G uralensis. To reveal the effects of co-expression of SQS1 and beta-AS genes on this pathway, 7 yeast expression vectors harboring different SQS1 variants and beta-AS were constructed and expressed in Saccharomyces cerevisiae as fusion proteins. TLC and GC-MS results showed that co-expression of SQS1 and beta-AS enhanced the accumulation of beta-amyrin. The effects of SQS12 were more obvious than the other two SQS1 variants. This study is significant for further investigations concerned with exploring the biosynthesis of glycyrrhizic acid in vitro and strengthening the efficacy of G. uralensis by means of increasing the content of glycyrrhizic acid.
Farnesyl-Diphosphate Farnesyltransferase ; genetics ; metabolism ; Glycyrrhiza uralensis ; genetics ; Intramolecular Transferases ; metabolism ; Oleanolic Acid ; analogs & derivatives ; metabolism ; Plant Proteins ; genetics ; Recombinant Proteins ; metabolism ; Saccharomyces cerevisiae ; metabolism

Glycyrrhiza uralensis Fisch. ex DC is widely used in traditional Chinese medicine (TCM). Among its various active components, glycyrrhizic acid is believed to be the marker component. Squalene synthase (SQS) and beta-amyrin synthase (beta-AS) are key enzymes in the biosynthetic pathway of glycyrrhizic acid in G uralensis. To reveal the effects of co-expression of SQS1 and beta-AS genes on this pathway, 7 yeast expression vectors harboring different SQS1 variants and beta-AS were constructed and expressed in Saccharomyces cerevisiae as fusion proteins. TLC and GC-MS results showed that co-expression of SQS1 and beta-AS enhanced the accumulation of beta-amyrin. The effects of SQS12 were more obvious than the other two SQS1 variants. This study is significant for further investigations concerned with exploring the biosynthesis of glycyrrhizic acid in vitro and strengthening the efficacy of G. uralensis by means of increasing the content of glycyrrhizic acid.