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OBJECTIVE To investigate the inhibitory effect of eight lignan compounds of Fructus Schisandrae chinensis in vitro on carboxylesterase 2 (CES2) and to estimate the herb-drug interaction (HDI) risks of strong CES2 inhibitors selected from the above compounds. METHODS Fluorescein diacetate (FD) was employed as a specific fluorescent probe of CES2. The residual activity of CES2 was detected in human liver microsomes after the intervention with deoxyschizandrin, schisanhenol, schisantherin E, schisandrol A, schisandrol B, gomisin J, gomisin G, and gomisin O at 37℃ for 10 min, respectively. 1% DMSO served as control. Residual activity of CES2 was assessed with metabolite production of FD detected by fluorescent intensity, combined with IC50 values of the above compounds to predict HDI risks between lignans and CES2-metabolizing drugs. RESULTS Compared with control group, the activity of CES2 was significantly inhibited by deoxyschizandrin and schisanhenol (P<0.01), with IC50 values of 8.06 μmol · L- 1 and 8.91 μmol · L- 1, respectively. The other six lignans compounds exhibited mild inhibitory effect on CES2. HDI risk prediction of deoxyschizandrin or schisanhenol indicated that exposure of CES2-metabolizing drugs might increase 11.24 and 0.40 times, respectively. CONCLUSION Deoxyschizandrin and schisanhenol exhibit strong inhibitory effects against CES2 in vitro so that potential HDI risks should be taken into account during administration of drugs containing Fructus Schisandrae chinensis.
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Programmed death-1(PD-1)and its ligand(PD-L1)inhibitors are a novel kind of immune checkpoint blockers, which are the highlights of anti-tumor immune therapy. PD-1 inhibitors,such as nivolumab and pembrolizumab have been granted by the market authorization to treat melanoma and non-small cell lung cancer. Clinical trials of their efficacy and safety on renal cell carci?noma,bladder carcinoma and Hodgkin′s lymphoma are still in process. PD-L1 inhibitors atezolizumab,durvalumab and avelumab have been approved by FDA for treatment of urothelial carcinoma. Several other drugs are in phaseⅠclinical trials. This paper gives a brief summary of recent advances in the studies on PD-1/PD-L1 inhibitors.
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The social and behavioral research in promoting human health and the impact on human social relations and structures has been confirmed .With the development of social and behavioral science , the importance of ethics review for the research is also increased .Despite its uniqueness , the basic principles of ethics in social and behavioral research are consistent with other biomedical studies .This paper introduces ethics review points of social and behavioral research from the research design , risk and benefits , informed consent , deception and debriefing , expedited review , exemption of ethics review, privacy and confidentiality .This paper also introduces the relevant experiences from Europe and America giving references for the domestic professionals .
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The application of information management for ethical review work help improve the quality of audit work quality and efficiency in our country , further standardize the ethical review work , also helps to protect the pri-vacy of the subjects in medical research , and establish the medical research ethics review information system in our country has certain feasibility .Therefore , can be based on the experience of the informatization construction of drug clinical trials , through the establishment of ethical review information and tracking system , to set up the electronic signature of information rights management system , building the continuing education training , establish a commu-nication platform with the principal investigator , to build and perfect the medical research ethics review information system.
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Recently ,network pharmacology was a pop emerging pharmacology branch .The theory of "multi-gene , multi-target"about network pharmacology was consistent with treatment of complex disease .Different from the traditional ex-perimental methods about pharmacology ,the research methods of network pharmacology uniquely obtain the information of drugs and relative targets with less time and less money .In this paper ,according to the searching of China Knowledge Re-source Integrated Database and PubMed ,three aspects about research methods of network pharmacology together with its ap-plications were introduced :network construction ,network analysis and experimental validation .The introductions of the meth-ods gave us a new vision in researching the field of pharmacology deeply .
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Ethics committee and informed consent are the main measures to safeguard the rights and interests of the subjects.Therefore, it needs to increase the ethical review intensity on informed consent , pay attention to the balance of benefit and risk , to maintain the subjects'rights and interests and security .Informed consent is one of the main ethical requirements for human body research .The following key points should be considered during the ethical review on informed consent:the completeness and sufficiency of the information;signed process;standardi-zation of the language;risk disposal, etc.
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Psoriasis is a chronic inflammatory disease related to genome-wide and surroundings, it is important to develop a suitable animal model to research psoriasis pathogenesis and evolve pharmacotherapeutics. With the development of transgenetic technology in the past few years, psoriasis virulence gene animal model become a hotspot. Research of animal model of human psoriasis genes is reviewed in the paper.
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Investigation of the pharmacokinetics of paeonol microemulsion, microemulsion-based gels and marketed paeonol ointments by the skin-blood synchronous microdialysis coupled with LC/MS is reported in this study. The microdialysis systems were established by linear probes and concentric circles probes. In vivo recovery of paeonol in skin is (69.7 +/- 4.8) % and in blood is (51.6 +/- 7.2)%. The paeonol microemulsion, microemulsion-based gels and marketed paeonol ointments were administered to rats. PBS (pH 7.4) served as perfused solution. The perfusion rate was 5 microL x mL(-1) and the microdialysis samples were collected every 20 min intervals. The paeonol concentration in perfused solution was determined by LC/MS. The results showed that paeonol microemulsion and microemulsion-based gels significantly raised the drug concentrations in skin more than that of paeonol ointments. The paeonol microemulsion-based gels has similar bioavailability as the paeonol ointments in blood, but its blood drug concentrations were steadier. The paeonol microemulsion-based gels may be developed into a new preparation for dermis eczema. The skin-blood synchronous microdialysis technique proved to be a new method for the pharmacokinetics study of transdermal delivery systems.
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The study aims to elucidate the characteristics of pharmacokinetics of scopolamine hydrobromide oral disintegrative microencapsule tablets in healthy Beagle dogs. Chromatographic separation was performed on a C18 column (100 mm x 3.0 mm, 3.5 microm) with methanol - 2 mmol x L(-1) ammonium formate (25 : 75) as the mobile phase. A trip-quadrupole tandem mass spectrum with the electrospray ionization (ESI) source was applied and positive ion multiple reaction monitoring mode was operated. Six Beagle dogs were randomly devided into two groups. They received oral single dose of scopolamine hydrobromide oral disintegrative microencapsule tablets 0.6 mg (test tablet) or scopolamine hydrobromide normal tablets (reference tablet). Plasma samples were collected at designed time. Plasma concentration of scopolamine hydrobromide was determined by LC-MS/MS and pharmacokinetic parameters were calculated. The pharmacokinetic parameters of test tablet vs reference tablet were as follows: C(max): (8.16 +/- 0.67) ng x mL(-1) vs (3.54 +/- 0.64) ng x mL(-1); t1/2: (2.83 +/- 0.45) h vs (3.85 +/- 0.82) h; t(max): (1.25 +/- 0.27) h vs (0.42 +/- 0.09) h; AUC(0-12h): (25.06 +/- 3.75) h x ng x mL(-1) vs (9.59 +/- 1.02) h x ng x mL(-1); AUC(0-infinity): (26.30 +/- 3.92) h x ng x mL(-1) vs (10.80 +/- 1.45) h x ng x mL(-1); MRT(0-12h): (3.38 +/- 0.34) h vs (3.86 +/- 0.26) h; MRT(0-infinity): (3.98 +/- 0.63) h vs (5.37 +/- 1.00) h. The absorption rate and AUC of test tablet is different from that of reference tablet. The bioavailability of test tablet is better than those of reference tablet.
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This study is to prepare scopolamine hydrobromide nanoparticles-in-microsphere system (SH-NiMS) and evaluate its drug release characteristics in vitro. SH nanoparticles were prepared by ionic crosslinking method with tripolyphosphate (TPP) as crosslinker and chitosan as carrier. Orthogonal design was used to optimize the formulation of SH nanoparticles, which took the property of encapsulation efficiency and drug loading as evaluation parameters. With HPMC as carrier, adjusted the parameters of spray drying technique and sprayed the SH nanoparticles in microspheres encaposulated by HPMC was formed and which is called nanoparticles-in-microsphere system (NiMS). SH-NiMS appearances were observed by SEM, structure was obsearved by FT-IR and the release characteristics in vitro were evaluated. The optimized formulation of SH nanoparticles was TPP/CS 1:3 (w/w), HPMC 0.3%, SH 0.2%. The solution peristaltic speed of the spray drying technique was adjusted to 15%, and the temperature of inlet was 110 degrees C. The encapsulation product yeild, drug loading and particle sizes of SH-NiMS were 94.2%, 20.4%, and 1256.5 nm, respectively. The appearances and the structure of SH-NiMS were good. The preparation method of SH-NiMS is stable and reliable to use, which provide a new way to develop new dosage form.
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<p><b>OBJECTIVE</b>To prepare paeonol microemulsion and microemulsion gel, and investigate its content, physical and chemical properties. Their transdermal properties in vitro were studied as well.</p><p><b>METHOD</b>IPM acted as oil phase, lecithin/APG as surfactant, 1,2-propanediol as cosurfactant, water was added dropwise to the oil phase to prepare paeonol microemulsion at room temperature using magnetic stirring. HPLC method were used to determine the content of paeonol in paeonol microemulsion. Transmission electron microscopy and laser particle size analyzer were used to determine the shape and size of the microemulsion. Carbopol 940 was uesd as substrate to prepare paeonol microemulsion gel. Franz diffusion cell was used for characterizing the microemulsion and gel transdermal properties in vitro.</p><p><b>RESULT</b>The paeonol microemulsion was O/W microemulsion. Its uniform particle size was 32 nm and was with roundness appearance and stable content. The steady-state permeation rates of paeonol saturated aqueous solution, microemulsion, and microemulsion gel were 47.846, 103.760, 70.401 microg x cm(-2) x h(-1), and their 12 h cumulative amount of infiltration were 657.179, 1 266.484, 881.217 microg x cm(-2), respectively.</p><p><b>CONCLUSION</b>The 12 h cumulative infiltration and infiltration rate of paeonol microemulsion and microemulsion gel are better than the saturated aqueous solution. Paeonol microemulsion gel is a new dosage form for transdermal drug delivery.</p>
Subject(s)
Acetophenones , Pharmacokinetics , Drug Carriers , Chemistry , Drug Delivery Systems , Methods , Drugs, Chinese Herbal , Pharmacokinetics , Emulsions , Chemistry , Gels , Chemistry , Models, Biological , Skin AbsorptionABSTRACT
OBJECTIVE:To promote the development of pharmacists' clinical thinking ability.METHODS:By analyzing the differences between physicians and pharmacists in clinical thinking together with our practical experience,we expounded the key points of pharmacists' clinical thinking,i.e.critical thinking,comprehensive thinking,evidence-based thinking,patient-cored thinking and creative thinking.RESULTS & CONCLUSION:The clinical thinking that is in line with pharmacists' characteristics should be developed with clinical pharmaceutical practice as the core and it can be achieved by enhancing pharmacists' ability to detect and solve the drug related problems.
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OBJECTIVE: To promote automated dispensing and rational drug use in the inpatient dispensary by applying information technology.METHODS: Powerbuilder9.0 development software and bar code technology were used to build a new drug unit dose automated dispensing system based on hospital information system.RESULTS: Two sub-system programs including clinical prescription screening and transmitting function were developed,and the rational drug use examination and reporting system was build up,which enhanced the efficiency of clinical dispensing,facilitated the accurate management of the drug stock amount in the medicine box of the machine.CONCLUSIONS: To develop software by taking consideration of the developmental trend of pharmacy can better meet the demand and adapt to the changing work flow in drug dispensing.
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OBJECTIVE:To offer suggestions for domestic hospitals in the introduction of automated unit-dose dispensing equipment.METHODS:The application value and problems arose from the introduction of automated unit-dose dispensing machine were analyzed by summarizing our experience and reviewing literature.RESULTS:The use of automatic machines could avoid drug pollution and cross infection and reduce the incidence of medication errors during drug dispensing and administration.However,its application has also resulted in problems such as additional machine errors more costs and management difficulties.The introduction of the machine should be based on rational demands and proof analysis.Moreover,it is more suitable for the unit-dose dispensing in inpatient dispensary.CONCLUSIONS:Automatic drug dispensing is the trend of development.The application of new equipment can bring new problems as well as challenges,thus it is urgent to explore new management model.
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OBJECTIVE:To provide references for pharmaceutical workers in retrieving literatures by means of Chinese bi_omedical database(CBM),China journal full-text database(CNK) and Chinese science & technology journal database(VIP).METHDOS:With the commonly research topics of hospital pharmacy as research scope,literatures retrieved by database sampling underwent a preliminary contrast analysis and a computer-assisted automatic meta-analysis after programming.RESU_TLS:None the 3 databases indexed all the tested pharmaceutical periodicals(totaled 79 kinds).There were differences among the un-indexed periodicals, except a few are the same in kinds.The retrieved literatures of docuterm had a high proportion of repetition;however,the computer had merged the same literatures retrieved in different databases.CONCLUSIONS:The literatures indexed in the 3 databases have their own characteristics,thus literature recall ratio can only be improved by combining multiple databases.The automatic meta-analysis of the retrieval literatures can be performed by means of computer program,the repeated work can be reduced thereafter.
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OBJECTIVE: To develop a network management system needed by infusion drugs’ disposition center in hospital. METHODS: Based on “Army No. 1” hospital Information, the infusion drugs’ disposition management system was studied and developed by applying PowerBuilder 6.5 and barcode management. RESULTS: The infusion drugs’ disposition management system consisted of 2 subsystems, which have the function of printing and identifying bar code labels, automatic checking infusion drug prescriptions, conducting information exchange within the local area network and improving management efficiency of infusion drugs’ disposition and meanwhile improving drug quality. CONCLUSION: Fully understanding and optimization of the business flow-sheet are keys in the successful development and application of infusion drugs’ management system. To improve the management level, the application of new technology is essential.
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OBJECTIVE:To study the professional risks of Chinese clinical pharmacists.METHODS:The source and avoidance of professional risks for clinical pharmacists were analyzed on the basis of current practice and literatures.RESULTS:Lack of clarity in duties and rights of clinical pharmacists,undefined criteria for evaluation of their works were among the main causes of their professional risks.CONCLUSION:It is essential to renew and implement the related regulations and guidelines on clinical pharmaceutical practice to minimize the professional risks,which should be responded both by the authority and professionals.
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OBJECTIVE:Probe into the procedures and contents of pharmaceutical care in department of gastroenterology. METHODS:The feasibility,requirement and our specialty of pharmaceutical care were systematically analyzed in department of gastroenterology through a special - purpose study and discussion, and a detailed design was instituted, then the four faces were established.RESULTS: Clinical pharmacists should bring their pharmaceutical specialty into full play, and worked smoothly with clinicians and nurses by aiming directly at kinds of clinical requirement .An initial effect of pharmaceutical care was shown in department of gastroenterology .CONCLUSION: Young clinical pharmacists should adopt a scientific analysis and normative procedure to work smoothly with clinical partners as quickly as possible at the beginning of their clinical pharmacy work and strive hard to be one of the important person in multidisciplinary treatment teams.
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Merely having complete sequences of genomes is not sufficient to elucidate biological function. Proteomics is complementary to genomics because it focuses on the large scared gene products, which are the active agents in cells. As almost all the drugs are directed against proteins, proteomics have been widely used in pharmacological research.Proteomics profiling in drug target identification, toxicological and drug resistances research was reviewed.
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Aim To explore the expression of TNF-related apoptosis-inducing ligand(TRAIL)between psoriatic patients and healthy subjects.Methods Immunohistochemical staining and Real-Time PCR methods were established to detect the expression of TRAIL.Results Immunohistochemical staining results indicated a significant difference of the expression of TRAIL between psoriatic patients and healthy subjects.Real-Time PCR results indicated that the quantities were 0.42?0.07,1.01?0.16 respectively of two type skins.Thus there were significant differences(P