AIM: To detect the total amount of heavy metals and the content of Pb,Cd,Hg in Yuanhuzhitong Tablets (Rhizoua Corydalis. Radix Angelicae Dahuricae). METHODS:The method of detecting the total amount of heavy metals in Volume 1 of 2000 China Pharmacopoeia and the methods of analyzing the content of Pb,Cd,Hg in Import and Export Agriculture Standard of Medical Plants and Pharmacentical issued by Economic Cooperation Department of Import and Export Bureau were discussed. RESULTS : The total amount of heavy metals is in the limit of the standard and amount of Pb、Cd、Hg is overproof to varying degrees. CONCLUSION :Because the standard of total heavy metals can not quarantee the quality of Chinese drugs,so we should establish available method to limit the amount of poisonous elements Pb、Cd、Hg.

With the social development, the importance of medical records has become increasingly prominent.This paper analyzes the methods and shortcomings of the current medical record quality control and proposes a new mode under two-level randomized blind method combining with the experience of our own hospital.This new mode, through reconstructing the work team, adjusting work pattern and task allocation, supervising problems rectification, combining with experts′ supervising terminal record, inspecting link record randomly, handling dissent, evaluating connotation quality and assessing performance, effectively reduced the defect rate of medical records, improved the archiving rate and promoted the quality of medical records, which is worth promoting.

Objective To evaluate the wound healing efficacy of negative pressure wound therapy (NPWT) combined with topical oxygen therapy ( TOT ) on the traumatic chronic wounds , and to explore new conception and method for traumatic chronic wounds . Methods Sixty-four patients with traumatic chronic wounds were randomized into two groups ( n=32 ) .Patients in the control group were treated by NPWT , and those in the intervention group were treated by NPWT and NPWT with TOT 3L/min.The treatment time lasted 12 days, and the dressing and tubes were changed every three days in the two groups .After 12 days, all the pa-tients were treated by standard moist therapy or surgery until healing or three months .Indicators of observation: The pressure ulcer scale for healing (PUSH) scores and granulation covered rate at 0, 3, 6, 9, and 12 days were measured, and healing rate and healing time during three months were calculated in the two groups . Results The PUSH scores were declined with intervention time during 12 days in the two groups , indicating the treatment was effective , but there was no significant difference between the two groups ( P>0 .05 ) .The granulation covered rate was increased with intervention time , and the granulation covered rate was higher in the intervention group than in the control group(P<0.001).The healing rate was higher in the intervention group than in the control group (87.50%vs 59.38%, P<0.05 ).The healing time of 14 days was shortened in the intervention group compared with the control group (P<0.001). Conclusion NPWT combined with TOT is an effective and feasible method for complicated traumatic chronic wounds , which can en-hance granulation growth , rise healing rate and shorten healing time .

JadH is a bifunctional hydoxylase/dehydrase involved in jadomycin biosynthesis; it catalyzes a post-PKS modification reaction to convert 2,3-dehydro-UWM6 to dehydrorabelomycin. To identify the key residues involved in substrate-binding and catalysis, structural modeling and multiple sequence alignments of JadH homologs were performed to predict nine residues at the proximity of substrate. Site-directed mutagenesis of the corresponding residues and in vitro evaluation of the activities of the mutant enzymes, indicate these mutations severely reduced JadH activity. Our results indicate these residues are specifically involved in substrate-binding or catalysis in JadH.
Amino Acid Sequence ; Catalysis ; Hydro-Lyases ; genetics ; metabolism ; Isoquinolines ; metabolism ; Mixed Function Oxygenases ; genetics ; metabolism ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Mutant Proteins ; metabolism ; Naphthoquinones ; metabolism ; Streptomyces ; metabolism ; Substrate Specificity

Two component system is a signal transduction system. It typically consists of a sensor histitine kinase and a cognate response regulator (RR) component. The activity of RR is regulated by a phosphorylation dependent mechanism. In recent years, the existence of atypical response regulators (ARRs), which rely on a phosphorylation independent mechanism to regulate their activity, have been recognized. ARRs are involved in the regulation of bacterial growth and development, antibiotic biosynthesis, iron transport, among others. Here we review the recent advances in the understanding of the structure and function of atypical response regulators, by using JadR1, a regulator in jadomycin biosynthesis in Streptomyces, as an example to elucidate the novel mechanism used by ARR to fine-tune its activity.
Bacterial Proteins ; genetics ; Gene Expression Regulation, Bacterial ; Gene Expression Regulation, Developmental ; Genes, Regulator ; genetics ; Histidine Kinase ; Isoquinolines ; metabolism ; Naphthoquinones ; metabolism ; Phosphorylation ; Protein Kinases ; genetics ; RNA-Binding Proteins ; genetics ; Signal Transduction ; Streptomyces ; metabolism ; Transcription Factors ; genetics

Cation transporters play important roles in modulating the concentration of intracellular metal ions. The vacuole is an important storage organelle for many ions. Cation (Ca+)/H+ antiporters (CAXs) located at vacuolar membrane are mainly involved in the Ca2+ flux into the vacuole, and appear to be capable of transporting various divalent cations to some degree. Several CAX genes have been isolated and characterized from various plants in recent years. Four domains of plant CAXs have been identified: NRR regulates Ca2+ transport by a mechanism of N-terminal autoinhibition; Ca domain and C domain confer Ca2+ and Mn2+ specificity among CAX transporters, respectively; D domain plays a part in the regulation of cytosolic pH. AtCAXs identified in Arabidopsis thaliana are involved in the growth, development and stress adaption of plant. AtCAX3 is the mainly Ca2+/H+ transporter in response to salt stress; AtCAX2 and AtCAX4 participate in transportation and detoxicification of heavy metal ions (Cd2+, Zn2+, and Mn2+) in cells under heavy metal stress, and impact root/shoot Cd partitioning in plant. These suggest that CAX genes may be useful for nutritional enhancement of plants, and for increasing phytoremediation potential. Here, the classification, structure and function of CAXs in plants are reviewed.
Antiporters ; chemistry ; physiology ; Arabidopsis ; chemistry ; Arabidopsis Proteins ; chemistry ; physiology ; Calcium ; metabolism ; Cation Transport Proteins ; chemistry ; physiology ; Membrane Proteins ; physiology ; Metals, Heavy ; metabolism ; Plant Physiological Phenomena ; Plant Proteins ; physiology ; Plants ; chemistry ; Proton Pumps ; chemistry ; physiology ; Vacuoles ; metabolism ; physiology