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Table of Content

    30 March 2020, Volume 29 Issue 3
    Original articles
    Microwave-assisted preparation and in vitro characterizations of doped superparamagnetic ferrite nanoclusters
    Xiaoxin Liu, Xiaoya Qin, Ziyuan Li, Tianyuan Fan
    2020, 29(3):  153-160.  DOI: 10.5246/jcps.2020.03.013
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    In order to obtain nanomaterials with superparamagnetism and high saturation magnetization, Mn-doped or Zn-doped superparamagnetic ferrite nanoclusters (Mn-FNs or Zn-FNs) were prepared by microwave-assisted solvothermal method in this study. Preliminary investigations were performed by transmission electron microscopy (TEM) and dynamic light scattering (DLS) instrument to observe the morphology and measure the particle size, respectively. Afterwards, Zn-FNs were chosen to be further characterized in vitro due to their better morphology and dispersity than Mn-FNs. The subsequent characterizations included crystallinephase, metal content and magnetic properties by X-ray diffractometer (XRD), inductively coupled plasma-mass spectrometry (ICP-MS) and vibrating sample magnetometer (VSM), respectively. The results showed that Zn-FNs had a cluster-like structure assembled by multiple nanoparticles. Zn-FNs were spherical in shape with good dispersity and relatively uniform particle size. Zn was successfullydoped in Zn-FNs which demonstrated spinel structure and excellent magnetic properties. Therefore, Zn-FNs had a favorable application prospect as a new type of magnetic nanomaterial. 
    Regulatory effects of traditional Chinese medicine on intestinal flora
    Sicong Tian, Jing Xue, Hui Song, Quan Du
    2020, 29(3):  161-175.  DOI: 10.5246/jcps.2020.03.014
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    Two traditional Chinese medicines (TCMs), namely WangshiBaochiwan and Panax Notoginseng Saponins (notoginsenoside),were chosen to study their effects on gut microbiota. Both of them have a long history of application in China. During a test of 28 d, different doses of the medicines were administered to male Wistar rats daily. At the end of the administration, fresh fecal samples were collected and subjected to 16S rRNA sequencing to determine the profiles of gut microbiota. In relative to the controls, effects on gut microbiota were evaluated with medicine-treated rats. Consistent with its unique bidirectional effects on constipation and diarrhea, treatment of WangshiBaochiwan led to a balanced regulation of Lactobacillus and Bacteroides. The treatment also led to increased populations of Ruminiclostridium_9 and Eubacterium_ventriosum that are the major producer of short-chain fatty acid (SCFA), and decreased populations of genus Jeotgalicoccus and Bilophila that are associated with inflammation. These changes therefore resulted in a much healthier microbiota environment in WangshiBaochiwan-treated rates. For the treatmentof notoginsenoside, effects were found with Enterobacteriaceae species that is associated with Parkinson's disease, Christensenellaceaefamily that is associated with aging, and hypertension-associated Rikenellaceae, Christensenellaceae, Lachnospiraceae and Bacteroidaceae species. In agreement with its major indications, the treatment further led to increased populations of SCFA-producingbacteria, such as Elusimicrobium, Anaerotruncus, Ruminococcaceae_NK4A214_group, and Intestinimonas. Taken together, treatment of the two TCMs led to active and distinguishable regulations of gut microbiota. Impressively, these changes were in agreement with their clinical efficacy, and suggested that they were involved in the treatment of these diseases.
    Urinary metabolomics analysis of the anti-depressive effects of Hemerocallis citrina extracts in a simulated microgravity-induced rat model of depression
    Teng Xu, Yan Wang, Cong Lu, Li Feng, Linxi Fan, Jing Sun, Bei Fan, Qiong Wang, Xinmin Liu, Fengzhong Wang
    2020, 29(3):  176-191.  DOI: 10.5246/jcps.2020.03.015
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    We investigated the antidepressant-like activity of Hemerocallis citrine Baroni extract (HCE) in a simulated microgravity (SMG)-induced rat model of depression using a metabolomics method. A rat model, generated via 14 d of SMG induction, was validated from the reduced sucrose preference and the enhanced immobility time in the forced swimming test. HCE and paroxetine reversed certain metabolite profiles. Anti-depressant effects of HCE might involve the regulation of several metabolic pathways, such as phenylalanine, glutamic acid, and tryptophan metabolism and changes in energy metabolism. 5-Hydroxytryptophan, hippuric acid, phenylacetylglycine, citric acid, 3-hydroxykynurenine, cyclic AMP, and L-DOPA profiles were altered upon HCE and paroxetine administration. Furthermore, glutamic acid was only regulated in the HCE group, while xanthurenic acid and deoxyuridine were reversed in the positive group, suggesting differences in the mechanisms between the positive drugs and HCE in improving glutamic acid metabolism. This study provided a theoretical foundation for the application of HCE in depression therapy.
    Concomitant administration of gastric acid suppression might attenuates the clinical efficacy of gefitinib: a single cancer center retrospective study
    Zihan Guo, Qiong Du, Xuan Ye, Feifei Gao, Yufang You, Bo Yu, Qing Zhai
    2020, 29(3):  192-198.  DOI: 10.5246/jcps.2020.03.016
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    Recent pharmacokinetic studies have demonstrated that gastric acid suppression (AS) reduces exposure of gefitinib. However, the clinical significance of this drug-drug interaction (DDI) has not been determined. We, therefore, evaluated it in this real-world study.A total of200 NSCLC patients who received gefitinib from 2016 to 2018 at Fudan University Shanghai Cancer Center (FUSCC) were randomly selected. The patients were divided into two groups according to whether AS was used. The clinical characteristics of the patients were collected, and the efficacy and safety of gefitinib were compared between the two groups. We showed that188 patients were considered eligible for this retrospective analysis, 49 received AS (AS user group), while 139 patients did not (AS non-user group). Objective response rate (ORR) and disease control rate (DCR) in the AS user group versus AS non-user group were 69.4% versus 73.4% (P = 0.591) and 89.8% versus 90.6% (P = 0.486), respectively, while the progression-free survival (PFS) were 9.7 versus 12.2 months (P = 0.0644). No significant difference in ORR, DCR or PFS was observed between the two groups. Further study showed that the PFS was related to the time of co-administration, and the patients receiving over 50% AS prescription overlap with gefitinib was significantly less compared with the other people (8.4 vs 12.6 months, P = 0.0004). The frequencies of rash (8.2% vs 15.1%,P = 0.281), diarrhea (4.1% vs 6.5%, P = 0.539) and elevated ALT or AST level (6.1% vs 10.1%, P = 0.407) were similar for both groups. Therefore, concomitant use of AS and gefitinib might affect the efficacy of gefitinib, which should be avoided if possible. 
    Determination of β-amyloid peptides in vitro aggregation process by electrochemistry
    Sufang Zhang, Cong Li, Ying Zhang, Juncheng Zou, Yinzhu Cui, Xiaomei Ling
    2020, 29(3):  199-205.  DOI: 10.5246/jcps.2020.03.017
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    An impedimetric sensor (EA/mAb/CeZnO/GCE) for detecting β-amyloid peptides (Aβ) was successfully constructed by synthesizing ceria doped zinc oxide (CeZnO) nanoparticles to modify the glassy carbon electrode (GCE) for immobilizing the antibody mAb, and blocking the unbound carboxyl sites with ethanolamine (EA). The sensor exhibited a linear detection range of 10–100 pM and a detection limit of 1.7 pM (S/N = 3), and the relative standard deviations (RSDs) of the inter-electrode and intra-electrodes were less than 3.0%. After it was stored at 4 °C for 2 d, its impedance value was 101.6% of original impedance response. The sensor was used to measure the remaining content of Aβ incubated in vitro. The results showed that after incubation for 48 h and 60 h, the content of aggregated Aβ (oligomers and fibers) almost unchanged, reaching about 90%. This method had the advantages of time-saving, simple procedure, economical, excellent conductivity, good reproducibility and stability.  
    Antioxidantive activities and gastrodin determination of extracts of endophytic fungi isolated from Gastrodia elata Bl.
    Xiaoxia Liang, Cheng Xiong, Yingying Gao, Qiaojia Fan
    2020, 29(3):  206-213.  DOI: 10.5246/jcps.2020.03.018
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    Gastrodia elata Bl. is a traditional Chinese herbal medicine with special pharmacological effects on headache and numbness. However, its wild sources are now in short supply because of over-excavation. A total of 14 endophytic fungi were isolated from Gastrodia elata Bl collected from Yinjing, in which 10 strains were identified, including Neonectria, Ascomycota, Fusarium, Oidiodendron and Dothiorella. All crude extracts showed some degrees of antioxidant activities by T-AOC method and DPPH methods, especially those from Oidiodendron GeR6 and Ascomycota sp. GeR2, which might be attributed due to their high phenolic contents. However, only Oidiodendron GeR6 contained gastrodin (39.2 μg/g) as the host plant in the crude extracts. In conclusion, the notable activities of GeR6 indicated its medical use as a natural antioxidant agent, as well as substitutable use for Gastrodia elata Bl. in the future.
    Discussion of the process control of large-scale instruments and equipment procurement in State Key Laboratory
    Shuxiang Song
    2020, 29(3):  214-219.  DOI: 10.5246/jcps.2020.03.019
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    In recent years, the usage, management and benefit of large-scale scientific research instruments and equipment in scientific research institutes have been a leading issue in the management of scientific research institutes. Within the scope of equipment budget, it is necessary for each equipment acquisition team to conduct a round of communication, coordination and negotiation with suppliers in order to improve the cost performance of equipment procurement and maximize the performance index to meet the needs of scientific research. By introducing the practical experience of the State Key Laboratory in purchasing imported equipment and managing large-scale instruments, this paper probes into the management process of the imported large-scalescientific research tax-free equipment of scientific research institutes, and explores the system and methods to guarantee and improve the efficiency of large-scale instruments in scientific research institutes from the aspects of policy, funds and technology.
     
    Drug administration and clinical pharmacy column
    Impact of the zero-markup drug policy on volume of medical service: based on 57 county hospitals of China
    Zhifeng Nie, Chunxia Man, Xin Yi, Yi Liu, Zhigang Guo, Xiaodong Guan, Luwen Shi
    2020, 29(3):  220-226.  DOI: 10.5246/jcps.2020.03.020
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    In the present study, we aimed to assess the long-term impact of zero-markup drug policy on volume of medical service in county hospitals of China. This study used 57 county hospitals’ records of medical service from 2011 to 2015, and a fixed effect model was applied to examine the impact of the zero-markup drug policy on volume of medical service. The outcome indicators included the number of patient visits, the number of prescriptions, the number of discharged patients, the length of stay, the number of patients who had surgeries and the number of patients who had CT or MRI, monthly. The number of hospitals which implementedthe zero-markup drug policy was increased continuously. By the end of 2015, 41 hospitals (71.9%) implemented this policy. The panel regression showed that most indicators were insignificantly decreased, including the number of patient visits (P<0.01), the length of stay (P<0.05), the number of patients who had surgeries (P<0.01) and the number of patients who had CT or MRI (P<0.01). However, the number of prescriptions and the number of discharged patients were not significantly changed. The implementation of the zero-markup drug policy might affect the reduction of the volume of medical service in county-level hospitals and the reason needs to be clarified in future studies.