Research of classical prescription based on QbD concept:optimization of extraction process for modified Siwu Decoction / 中国中药杂志

As an advanced concept in international pharmaceutical research,quality by design( QbD) can fulfill the strategic requirements of drug quality from testing to design. In this paper,the extraction process of Yanggong Prescription which was the modified Siwu Decoction was optimized based on QbD concept. With the extraction amount of solid matter,the content of ferulic acid and the content of paeoniflorin as critical quality attributes( CQAs),the failure mode and effect analysis( FMEA) was used to screen potential critical process parameters( p CPPs). The mathematical model was established by Box-Behnken experimental design to investigate the interaction between critical process parameters( CPPs) and CQAs. Then the design space for the extraction process of Yanggong Prescription was further established and optimized. Analysis of variance showed that the variance of all models was significant( P<0. 01),and the lack-of-fit value was not significant,indicating that the model was statistically significant. The relationship between various factors and the response values could be functionalized by the established models. Finally,through the optimization of the design space,the optimum extraction process of Yanggong Prescription was obtained as follows: 3 extraction times,122 minutes extraction,and 7 times of water adding. The extraction process of Yanggong Prescription based on the QbD concept was robust and reliable,which would provide guidance for the process development and quality control of its formulations.

Identification of a novel mutation in the ATP2C1 gene in a Chinese pedigree with Hailey-Hailey disease / 中国医学科学院学报

<p><b>OBJECTIVE</b>To study a Chinese pedigree with Hailey-Hailey disease (HHD) and examine the ATP2C1 gene mutation in this family.</p><p><b>METHOD</b>All exons of ATP2C1 gene were analyzed with polymerase chain reaction and DNA sequencing in all patients of this family and 100 unrelated population-match controls.</p><p><b>RESULTS</b>We identified a novel heterozygous nucleotide A --> G transition at position 235 - 2 in intron 3 of ATP2C1 gene. This splice site mutation was not found in the healthy members of this pedigree and in the controls.</p><p><b>CONCLUSION</b>The splicing mutation can affect the result of transcription and translation, and it is a specific novel mutation of ATP2C1 gene.</p>

Study on clinical isolates of human cytomegalovirus found in Urumqi by restriction fragment length polymorphism of PCR products / 中华实验和临床病毒学杂志

<p><b>BACKGROUND</b>The study was designed to investigate the status of molecular epidemiology of HCMV in Urumqi through genetic comparison of clinical isolates.</p><p><b>METHODS</b>DNA sequences of 2.0-2.6 kb were amplified by polymerase chain reaction from three relatively conservative gene regions (DNA polymerase, glycoproteins H, and major immediate-early antigen) of 28 clinical HCMV strains and then were analysed by restriction enzymes.</p><p><b>RESULTS</b>The restriction patterns of the clinical isolates which did not have relation in epidemiology were greatly different, but the patterns of the clinical isolates related in epidemiology such as strains paired in mother and infant were quite similar. Of eight mother and infant pairs, from whom HCMV were isolated, four pairs showed identity of restriction profiles within each pair for all three amplified regions, four pairs showed differences between mother and infant.</p><p><b>CONCLUSION</b>These results confirm the high degree of genetic variability among cytomegalovirus strains in Urumqi. Analysis of PCR-RFLP can indicate transmission of HCMV infection and facilitate its molecular epidemiologic studies.</p>