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  1. Article ; Online: Study of compaction tools and parameters on critical quality attributes of high drug load minitablets.

    Loo, Shang Jun / Lim, Cheng Yee / Heng, Paul Wan Sia / Chan, Lai Wah

    International journal of pharmaceutics

    2024  Volume 652, Page(s) 123806

    Abstract: Minitablets are prepared using multiple die openings and multi-tip punches for greater productivity. With multiple tips on the punch barrel, the overall compaction force to be applied is commonly estimated by multiplying the desired compaction force per ... ...

    Abstract Minitablets are prepared using multiple die openings and multi-tip punches for greater productivity. With multiple tips on the punch barrel, the overall compaction force to be applied is commonly estimated by multiplying the desired compaction force per tip by the number of punch tips. Few researchers have however examined this proportionality and the effects of the number of punch tips and punch face geometry on the critical quality attributes (CQAs) of high drug load minitablets. In this study, the minitablets prepared by multi-tip tools exhibited greater weight variation than those prepared by single-tip tools. Their compaction was accompanied by a longer dwell time that led to a higher minitablet tensile strength and consequently a longer disintegration time. The compaction forces required to achieve a consistent set of minitablet CQAs were not directly proportional to the number of punch tips used. In comparison, the effect of punch face geometry was negligible. Increasing concentration of magnesium stearate (as lubricant) from 0.75 to 1.25 %, w/w reduced weight variation, especially of minitablets prepared by the multi-tip tools. It also increased the disintegration time but had no significant effect on the tensile strength of the minitablets regardless of type of tools used. The adjustment of compaction speed was an effective compensatory method to mitigate the differences in dwell time and tensile strength between minitablets prepared by single-tip and multi-tip standard concave tools. A larger reduction in compaction speed of the single-tip tools was required at higher compaction pressures.
    MeSH term(s) Tablets ; Excipients ; Tensile Strength ; Pressure ; Drug Compounding/methods
    Chemical Substances Tablets ; Excipients
    Language English
    Publishing date 2024-01-12
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 428962-6
    ISSN 1873-3476 ; 0378-5173
    ISSN (online) 1873-3476
    ISSN 0378-5173
    DOI 10.1016/j.ijpharm.2024.123806
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Comparison of efficacy between unilateral biportal endoscopic lumbar fusion versus minimally invasive transforaminal lumbar fusion in the treatment of lumbar degenerative diseases: A systematic review and meta-analysis.

    Li, Yang / Gao, Shang Jun / Hu, Xu / Lin, Shi Shui

    Medicine

    2023  Volume 102, Issue 34, Page(s) e34705

    Abstract: Background: To evaluate the clinical efficacy and prognosis of unilateral biportal endoscopic lumbar fusion (ULIF) and minimally invasive transforaminal lumbar fusion (MIS-TLIF) for lumbar degenerative diseases.: Methods: Chinese and English ... ...

    Abstract Background: To evaluate the clinical efficacy and prognosis of unilateral biportal endoscopic lumbar fusion (ULIF) and minimally invasive transforaminal lumbar fusion (MIS-TLIF) for lumbar degenerative diseases.
    Methods: Chinese and English databases were retrieved for the period from database creation to December 31, 2022. Case-control studies on unilateral biportal endoscopic lumbar fusion were collected. The observation indexes consisted of operation times, intraoperative blood loss, postoperative drainage volume, length of hospital stay, postoperative pain score, postoperative oswestry disability index score, postoperative MacNab excellent and good rate, imaging fusion rate at the last follow-up, and complications. The NO rating table was employed to assess the quality of the included literature, and a meta-analysis was conducted using Revman5.4.1 and Stata17.
    Results: Ten studies with 738 surgical patients were considered, including 347 patients in the ULIF group and 391 in the MIS-TLIF group. This Meta-analysis demonstrated statistically significant differences in mean operation duration, intraoperative blood loss, postoperative drainage volume, length of hospital stay, and early postoperative (1-2W) visual analogue scale/score (VAS) scores for back pain. No significant differences were observed in the final follow-up postoperative VAS scores for back pain, postoperative leg VAS score, postoperative oswestry disability index score, excellent and good rate of postoperative modified MacNab, imaging fusion rate, and complications.
    Conclusion: Compared with the MIS-TLIF group, the ULIF group had longer operation time, lower intraoperative blood loss and postoperative drainage volume, lower lumbar VAS score in the early postoperative period, and shorter hospital stay. ULIF is less invasive than traditional MIS-TLIF, making it a trustworthy surgical option for lumbar degenerative diseases with comparable fusion efficiency, superior MacNab rate, and complication rate.
    MeSH term(s) Humans ; Lumbar Vertebrae/surgery ; Minimally Invasive Surgical Procedures ; Spinal Fusion ; Endoscopy ; Blood Loss, Surgical ; Postoperative Hemorrhage
    Language English
    Publishing date 2023-08-31
    Publishing country United States
    Document type Meta-Analysis ; Systematic Review ; Journal Article
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000034705
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Charge reduction assisted production of diminutive fluid bed granules for high drug load minitablets.

    Loo, Shang Jun / Heng, Paul Wan Sia / Chan, Lai Wah

    International journal of pharmaceutics

    2022  Volume 623, Page(s) 121965

    Abstract: Micronized drug powders are generally unsuitable as tableting feed to produce minitablets due to their cohesivity and poor flow. The silicification of fine paracetamol powder ( ... ...

    Abstract Micronized drug powders are generally unsuitable as tableting feed to produce minitablets due to their cohesivity and poor flow. The silicification of fine paracetamol powder (PCM
    MeSH term(s) Acetaminophen ; Drug Compounding ; Particle Size ; Powders ; Silicon Dioxide/chemistry ; Tablets/chemistry
    Chemical Substances Powders ; Tablets ; Acetaminophen (362O9ITL9D) ; Silicon Dioxide (7631-86-9)
    Language English
    Publishing date 2022-06-25
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 428962-6
    ISSN 1873-3476 ; 0378-5173
    ISSN (online) 1873-3476
    ISSN 0378-5173
    DOI 10.1016/j.ijpharm.2022.121965
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Automated and fast online method for simultaneously determining a broad spectrum of per- and polyfluoroalkyl substances in a small volume of cerebrospinal fluid

    Shang, Jun / Gao, Ke / Chi, Bowen / Piao, Yingshi / Ma, Qiuying / Lü, Liping / Wang, Jiawei

    Anal Bioanal Chem. 2023 Mar., v. 415, no. 6 p.1221-1233

    2023  

    Abstract: Per- and polyfluoroalkyl substances (PFASs) are potentially neurotoxic compounds. Levels of PFASs in cerebrospinal fluid (CSF) could directly reflect their potential harm to the central nervous system. Because of the variety of PFASs and the rarity of ... ...

    Abstract Per- and polyfluoroalkyl substances (PFASs) are potentially neurotoxic compounds. Levels of PFASs in cerebrospinal fluid (CSF) could directly reflect their potential harm to the central nervous system. Because of the variety of PFASs and the rarity of CSF, there is an urgent need to establish a rapid online method to detect a broad spectrum of PFASs accurately and simultaneously by consuming a small amount of CSF. In this study, we developed a fast and automated method to analyze 52 PFASs in human CSF samples using online TurboFlow ultra-high-performance liquid chromatography–tandem mass spectrometry. Our method offered excellent matrix-matched standard curve linearity (correlation coefficient > 0.99), good limits of quantitation (MLOQs) (0.01 to 0.08 ng mL⁻¹), satisfactory accuracy (recoveries of 74.6%–119.1%) and precision (relative standard deviations of 1.4%–13.2%), small sample amount consumption (50 μL), and fast analysis time (18 min per sample) without complex sample pretreatment procedures. These are advantageous for the high throughput screening of PFASs in environmental epidemiology studies. Repeated freeze–thaw experiments showed that it was better to perform the analytical process soon as possible after sample collection. The established method was used to analyze PFASs in 60 people. Short-chain PFASs, perfluorobutanoic acid (PFBA), perfluoropentanoic acid (PFPeA), and novel PFASs [sodium 2-(N-ethylperfluorooctane-1-sulfonamido)ethyl phosphate (SAmPAP), perfluoroethylcyclohexanesulfonate (PFECHS), and perfluoro-3, 7-dimethyloctanoic acid (P37DMOA)] were reported in CSF for the first time. PFBA and PFPeA were detected in all samples with mean concentrations of 0.24 and 0.22 ng mL⁻¹, respectively. We also calculated the blood–brain barrier transmission efficiency of PFASs (RPFAS), and the mean RPFBA value was above 1, which indicated that PFBA might transfer from serum to CSF.
    Keywords automation ; blood serum ; blood-brain barrier ; central nervous system ; cerebrospinal fluid ; epidemiology ; freeze-thaw cycles ; humans ; liquid chromatography ; neurotoxicity ; people ; perfluoropentanoic acid ; phosphates ; sodium ; tandem mass spectrometry
    Language English
    Dates of publication 2023-03
    Size p. 1221-1233.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ISSN 1618-2642
    DOI 10.1007/s00216-022-04507-4
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Effect of chemotherapy on sex hormone levels in perimenopause women with breast cancer

    Shang-Jun Liu

    Journal of Hainan Medical University, Vol 22, Iss 11, Pp 122-

    2016  Volume 124

    Abstract: Objective: To explore the effect of chemotherapy on the sex hormone levels in perimenopause women with breast cancer. Methods: A total of 90 perimenopause women after breast cancer surgery who were admitted in our hospital from November, 2014 to November, ...

    Abstract Objective: To explore the effect of chemotherapy on the sex hormone levels in perimenopause women with breast cancer. Methods: A total of 90 perimenopause women after breast cancer surgery who were admitted in our hospital from November, 2014 to November, 2015 were included in the study. Those whose PR and ER were positive served as the observation group and were given TAM. Those whose PR and ER were negative served as the control group and were not given TAM. The chemiluminescence method was used to determine the levels of LH, FSH, and E2. The Doppler ultrasound device was used to measure the endometrial thickness and intrauterine depth before and after menopause. After fractional curettage by hysteroscopy, the patients in the observation group were performed with pathological examinations. The pathological change of endometrium before and after menopause was observed. Results: LH and FSH levels in the observation group were significantly lower than those in the control group, while E2 level was significantly higher than that in the control group. The comparison of endometrial thickness and intrauterine depth before and after menopause was not statistically significant. The occurrence rate of endometrial polyps, endometrial carcinoma, simple hyperplasia, and atypical hyperplasia in patients before menopause was significantly less than that in patients after menopause. Conclusions: Due to be in a special endocrine environment, during TAM administration period for perimenopause women with breast cancer, a regular determination of sex hormone levels, adoption of B ultrasound and hysteroscope to detect the endometrial thickness and pathological change are required in order to guide the clinical medication.
    Keywords Chemotherapy ; TAM ; Perimenopause women ; Breast cancer ; Sex hormone level ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2016-06-01T00:00:00Z
    Publisher Editorial Board of Journal of Hainan Medical University
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: NLRRC: A Novel Clustering Method of Jointing Non-Negative LRR and Random Walk Graph Regularized NMF for Single-Cell Type Identification.

    Wang, Juan / Wang, Lin-Ping / Yuan, Sha-Sha / Li, Feng / Liu, Jin-Xing / Shang, Jun-Liang

    IEEE journal of biomedical and health informatics

    2023  Volume 27, Issue 10, Page(s) 5199–5209

    Abstract: The development of single-cell RNA sequencing (scRNA-seq) technology has opened up a new perspective for us to study disease mechanisms at the single cell level. Cell clustering reveals the natural grouping of cells, which is a vital step in scRNA-seq ... ...

    Abstract The development of single-cell RNA sequencing (scRNA-seq) technology has opened up a new perspective for us to study disease mechanisms at the single cell level. Cell clustering reveals the natural grouping of cells, which is a vital step in scRNA-seq data analysis. However, the high noise and dropout of single-cell data pose numerous challenges to cell clustering. In this study, we propose a novel matrix factorization method named NLRRC for single-cell type identification. NLRRC joins non-negative low-rank representation (LRR) and random walk graph regularized NMF (RWNMFC) to accurately reveal the natural grouping of cells. Specifically, we find the lowest rank representation of single-cell samples by non-negative LRR to reduce the difficulty of analyzing high-dimensional samples and capture the global information of the samples. Meanwhile, by using random walk graph regularization (RWGR) and NMF, RWNMFC captures manifold structure and cluster information before generating a cluster allocation matrix. The cluster assignment matrix contains cluster labels, which can be used directly to get the clustering results. The performance of NLRRC is validated on simulated and real single-cell datasets. The results of the experiments illustrate that NLRRC has a significant advantage in single-cell type identification.
    MeSH term(s) Humans ; Algorithms ; Cluster Analysis ; Single-Cell Analysis ; Gene Expression Profiling/methods
    Language English
    Publishing date 2023-10-05
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2695320-1
    ISSN 2168-2208 ; 2168-2194
    ISSN (online) 2168-2208
    ISSN 2168-2194
    DOI 10.1109/JBHI.2023.3299748
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Joint L

    Wang, Tai-Ge / Shang, Jun-Liang / Liu, Jin-Xing / Li, Feng / Yuan, Shasha / Wang, Juan

    Computer methods in biomechanics and biomedical engineering

    2023  Volume 27, Issue 4, Page(s) 498–511

    Abstract: The development and widespread utilization of high-throughput sequencing technologies in biology has fueled the rapid growth of single-cell RNA sequencing (scRNA-seq) data over the past decade. The development of scRNA-seq technology has significantly ... ...

    Abstract The development and widespread utilization of high-throughput sequencing technologies in biology has fueled the rapid growth of single-cell RNA sequencing (scRNA-seq) data over the past decade. The development of scRNA-seq technology has significantly expanded researchers' understanding of cellular heterogeneity. Accurate cell type identification is the prerequisite for any research on heterogeneous cell populations. However, due to the high noise and high dimensionality of scRNA-seq data, improving the effectiveness of cell type identification remains a challenge. As an effective dimensionality reduction method, Principal Component Analysis (PCA) is an essential tool for visualizing high-dimensional scRNA-seq data and identifying cell subpopulations. However, traditional PCA has some defects when used in mining the nonlinear manifold structure of the data and usually suffers from over-density of principal components (PCs). Therefore, we present a novel method in this paper called joint
    MeSH term(s) Single-Cell Gene Expression Analysis ; Principal Component Analysis ; Single-Cell Analysis/methods ; Algorithms ; Cluster Analysis
    Language English
    Publishing date 2023-03-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2071764-7
    ISSN 1476-8259 ; 1025-5842
    ISSN (online) 1476-8259
    ISSN 1025-5842
    DOI 10.1080/10255842.2023.2188106
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Inhibitory effect of acarbose on tyrosinase: application of molecular dynamics integrating inhibition kinetics.

    Xu, Jie-Hao / Lee, Jinhyuk / Yin, Shang-Jun / Wang, Wei / Park, Yong-Doo

    Journal of biomolecular structure & dynamics

    2023  Volume 42, Issue 1, Page(s) 314–325

    Abstract: Due to its clinical and cosmetic applications, investigators have paid attention to tyrosinase (TYR) inhibitor development. In this study, a TYR inhibition study with acarbose was investigated to gain insights into the regulation of the catalytic ... ...

    Abstract Due to its clinical and cosmetic applications, investigators have paid attention to tyrosinase (TYR) inhibitor development. In this study, a TYR inhibition study with acarbose was investigated to gain insights into the regulation of the catalytic function. Biochemical assay results indicated that acarbose was turned to be an inhibitor of TYR in a reversible binding manner and probed as a distinctive mixed-type inhibitor via measurement of double-reciprocal kinetic (
    MeSH term(s) Molecular Dynamics Simulation ; Monophenol Monooxygenase/metabolism ; Acarbose/pharmacology ; Enzyme Inhibitors/chemistry ; Catalytic Domain ; Molecular Docking Simulation ; Kinetics
    Chemical Substances Monophenol Monooxygenase (EC 1.14.18.1) ; Acarbose (T58MSI464G) ; Enzyme Inhibitors
    Language English
    Publishing date 2023-03-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 49157-3
    ISSN 1538-0254 ; 0739-1102
    ISSN (online) 1538-0254
    ISSN 0739-1102
    DOI 10.1080/07391102.2023.2192800
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Automated and fast online method for simultaneously determining a broad spectrum of per- and polyfluoroalkyl substances in a small volume of cerebrospinal fluid.

    Shang, Jun / Gao, Ke / Chi, Bowen / Piao, Yingshi / Ma, Qiuying / Lu, Liping / Wang, Jiawei

    Analytical and bioanalytical chemistry

    2023  Volume 415, Issue 6, Page(s) 1221–1233

    Abstract: Per- and polyfluoroalkyl substances (PFASs) are potentially neurotoxic compounds. Levels of PFASs in cerebrospinal fluid (CSF) could directly reflect their potential harm to the central nervous system. Because of the variety of PFASs and the rarity of ... ...

    Abstract Per- and polyfluoroalkyl substances (PFASs) are potentially neurotoxic compounds. Levels of PFASs in cerebrospinal fluid (CSF) could directly reflect their potential harm to the central nervous system. Because of the variety of PFASs and the rarity of CSF, there is an urgent need to establish a rapid online method to detect a broad spectrum of PFASs accurately and simultaneously by consuming a small amount of CSF. In this study, we developed a fast and automated method to analyze 52 PFASs in human CSF samples using online TurboFlow ultra-high-performance liquid chromatography-tandem mass spectrometry. Our method offered excellent matrix-matched standard curve linearity (correlation coefficient > 0.99), good limits of quantitation (MLOQs) (0.01 to 0.08 ng mL
    MeSH term(s) Humans ; Tandem Mass Spectrometry/methods ; Fluorocarbons/analysis ; Chromatography, High Pressure Liquid/methods ; Water Pollutants, Chemical/analysis
    Chemical Substances perfluoropentanoic acid ; Fluorocarbons ; perfluorobutyric acid (375-22-4) ; Water Pollutants, Chemical
    Language English
    Publishing date 2023-01-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 201093-8
    ISSN 1618-2650 ; 0016-1152 ; 0372-7920
    ISSN (online) 1618-2650
    ISSN 0016-1152 ; 0372-7920
    DOI 10.1007/s00216-022-04507-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Study of diminutive granules as feed powders for manufacturability of high drug load minitablets.

    Loo, Shang Jun / Seah, Xin Yun / Heng, Paul Wan Sia / Chan, Lai Wah

    International journal of pharmaceutics

    2023  Volume 638, Page(s) 122922

    Abstract: The maximal amount of drug contained in a minitablet is limited. To reduce the total number of minitablets in a single dose, high drug load minitablets can be prepared from high drug load feed powders by various pharmaceutical processing techniques. Few ... ...

    Abstract The maximal amount of drug contained in a minitablet is limited. To reduce the total number of minitablets in a single dose, high drug load minitablets can be prepared from high drug load feed powders by various pharmaceutical processing techniques. Few researchers have however examined the influence of pharmaceutical processing techniques on the properties of high drug load feed powders, and consequently the manufacturability of high drug load minitablets. In this study, silicification of the high drug load physical mix feed powders alone did not yield satisfactory quality attributes and compaction parameters to produce good quality minitablets. The abrasive nature of fumed silica increased ejection force and damage to the compaction tools. Granulation of fine paracetamol powder was crucial for the preparation of good quality high drug load minitablets. The diminutive granules had superior powder packing and flow properties for homogenous and consistent filling of the small die cavities when preparing minitablets. Compared to the physical mix feed powders for direct compression, the granules which possessed higher plasticity, lower rearrangement and elastic energies, yielded better quality minitablets with high tensile strength and rapid disintegration time. High shear granulation demonstrated greater process robustness than fluid bed granulation, with less discernment on the quality attributes of feed powder. It could proceed without fumed silica, with the high shear forces reducing interparticulate cohesivity. An in-depth understanding on the properties of high drug load feed powders with inherently poor compactability and poor flowability is important for the manufacturability of high drug load minitablets.
    MeSH term(s) Technology, Pharmaceutical/methods ; Powders ; Tablets ; Tensile Strength ; Silicon Dioxide ; Drug Compounding ; Particle Size
    Chemical Substances Powders ; Tablets ; Silicon Dioxide (7631-86-9)
    Language English
    Publishing date 2023-04-03
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 428962-6
    ISSN 1873-3476 ; 0378-5173
    ISSN (online) 1873-3476
    ISSN 0378-5173
    DOI 10.1016/j.ijpharm.2023.122922
    Database MEDical Literature Analysis and Retrieval System OnLINE

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