Publications by authors named "Qingyuan Lv"

Objective: The aim of this study was to evaluate the expression of Angiopoietin-1 (Ang-1), Angiopoietin-2 (Ang-2) and vascular endothelial growth factor (VEGF) in cervical cancer and its clinical significance.

Methods: Immunohistochemical assay was used to examine the expression of Ang-1/2 and VEGF in tumor tissue from 56 cervical squamous cell carcinoma patients treated with operation only (SCC-O group), as well as 51 subjects with cervical squamous cell carcinoma treated with neoadjuvant radiotherapy (SCC-RCO group, n=28) or neoadjuvant chemotherapy (SCC-CO group, n=23). Both microvessel density (MVD) and lymphatic vessel density (LVD) were examined in the three groups through detection of CD34 and D2-40 expression in respective tissue samples.

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The objective of this study was to prepare nanostructured lipid carrier (NLC)-based topical gel of Ganoderma Triterpenoids (GTs) and evaluate their effects on frostbite treatment. GT-NLCs was prepared by the high pressure homogenization method and then characterized by morphology and analyses of particle size, zeta potential, entrapment efficiency (EE), and drug loading (DL). The NLCs was suitably gelled for skin permeation studies in vitro and pharmacodynamic evaluation in vivo, compared with the GT emulgel.

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Cucurbitacin B (Cu B), formulated in the phospholipid-bile salts-mixed micelles (PL-BS-MMs), was transformed into dry powders by solidification process. Solidification methods for this transformation included freeze-drying, spray-drying or vacuum-drying, and different grades of process parameters called conservative, moderate and aggressive have been used in each solidification method, respectively. Saccharides (mannose, trehalose and glucose), polyethylene glycol (PEG) and mucoadhesive water-soluble polymers (carrageenan, hydroxpropylmethylcellulose (HPMC) and gelatin) were selected as the stabilizer, respectively.

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The anti-bacterial activities of three types of di-O-caffeoylquinic acids (diCQAs) in Lonicera japonica flowers, a traditional Chinese medicine (TCM), on Bacillus shigae growth were investigated and compared by microcalorimetry. The three types of diCQAs were 3, 4-di-O-caffeoylquinic acid (3, 4-diCQA), 3, 5-di-O-caffeoylquinic acid (3, 5-diCQA), and 4, 5-di-O-caffeoylquinic acid (4, 5-diCQA). Some qualitative and quantitative information of the effects of the three diCQAs on metabolic power-time curves, growth rate constant k, maximum heat-output power Pm, and the generation time tG, total heat output Qt, and growth inhibitory ratio I of B.

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The aim of this study was to investigate the feasibility of using spray granulation as a drying method to convert phospholipid (PL)-sodium deoxycholate (SDC)-mixed micelles (MMs) containing a water-insoluble drug to a solid dosage form and to evaluate how drugs with significantly different physicochemical properties affect the spray granulation process and subsequent in vitro and in vivo processes. Cucurbitacin B (Cu B) and glycyrrhizin (GL) were used as the model drugs. After spray granulation, the dried Cu B-PL/SDC-MM powder was completely redispersible within 15 minutes in vitro.

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Objective: The purpose of this study was to design and optimize a novel drug nanoparticles-loaded oral fast dissolving film (NP-OFDF) using Box-Behnken design-response surface methodology.

Methods: Drug nanosuspensions produced from high pressure homogenization were transformed into oral fast dissolving film containing drug nanoparticles by casting methods. Herpetrione (HPE), a novel and potent antiviral agent with poor water solubility that was extracted from Herpetospermum caudigerum, was studied as the model drug.

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Article Synopsis
  • The study focuses on enhancing the absorption and bioavailability of baicalin through a nanocrystal drug delivery system.
  • A specific ultrasonic-homogenization technique was employed to create stable baicalin-nanocrystal powders, which showed significantly improved solubility and absorption compared to traditional formulations.
  • Results indicated that the nanocrystal form of baicalin achieved greater bioavailability in rats, demonstrating the effectiveness of the new delivery method.
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Aim: To improve the absorption of thymopeptides (TH) by preparing sodium deoxycholate/phospholipid-mixed nanomicelles (SDC/PL-MMs).

Methods: TH-SDC/PL-MMs were prepared by a film dispersion method, and then evaluated using photon correlation spectroscopy (PCS), zeta potential measurement, as well as their physical stability after storage for several days. Furthermore, in situ intestinal single-pass perfusion experiments and pharmacodynamics in immunodeficient mice were performed to make a comparison with TH powders and the control drug in absorption properties.

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Cucurbitacin B (Cu B), a potent anti-cancer agent, suffers with the problems of water-insoluble, gastrointestinal side effects and non-specific toxicity via oral administration and drawbacks in patient's compliance and acceptance through injections. An integration of nanoscale carriers with mucoadhesive buccal films drug delivery system would resolve these issues effectively with greater therapeutic benefits and clinical significance. Thus, the drug loaded mucoadhesive buccal film was developed and characterized in this study and the carboxymethyl chitosan (CCS) was chosen as a bioadhesive polymer, glycerol was chosen as a plasticizer and phospholipid-bile salts-mixed micelles (PL-BS-MMs) was selected as the nanoscale carriers.

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In the present study, a novel hydrogel-grafted fabrics embedding of berberine nanosuspension was developed for the treatment of infected wound. Hydrogel-grafted fabric was prepared by graft copolymerization of N-isopropylacrylamide and alginate using ceric ammonium nitrate as initiator. Berberine nanosuspension was prepared and embedded in the hydrogel-grafted fabrics to achieve sustained drug release.

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In this study, a novel orodispersible film (ODF) containing drug nanoparticles was developed with the goal of transforming drug nanosuspensions into a solid dosage form and enhancing oral bioavailability of drugs with poor water solubility. Nanosuspensions were prepared by high pressure homogenization and then transformed into ODF containing drug nanoparticles by mixing with hydroxypropyl methylcellulose solution containing microcrystalline cellulose, low substituted hydroxypropylcellulose and PEG-400 followed by film casting and drying. Herpetrione, a novel and potent antiviral agent with poor water solubility that extracted from Herpetospermum caudigerum, was chosen as a model drug and studied systematically.

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Objective: To prepare baicalin nanocrystal (BC-NC) and evaluate its pharmacokinetics in rats.

Method: Baicalin nanosuspensions (BC-NS) were prepared by the high pressure homogenization technology combined with ultrasonic, and then BC-NS were solidificated into BC-NC pellets by removing the water through fluid-bed drying. Its morphology, mean diameter and Zeta-potential were determined.

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Objectives: The main purpose of this study was to enhance the intestinal absorption activity and hepatoprotective effect of herpetrione by drug nanosuspensions.

Methods: Herpetrione nanosuspensions (HNS) were prepared using pH-dependent dissolving-precipitating/homogenization process and then systematically characterized. The intestinal absorption activity of HNS were studied using the recirculating perfusion technique in comparison with herpetrione coarse suspensions (HCS) and pure herpetrione using the recirculating perfusion technique.

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Schisandrae lignans (SL) have been well proven to possess hepatoprotective effect against the hepatic dysfunction induced by various chemical hepatotoxins. Deoxyschisandrin (DA) and schisantherin A (SA) are both considered as the major active components in SL. The objective of the study was to prepare and evaluate Schisandra lignans (composed of DA and SA)-loaded enteric nanoparticles produced by a novel toxic solvent-free modified spontaneous emulsification solvent diffusion (SESD) method.

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Article Synopsis
  • - Glycyrrhizin (GL), derived from licorice, has low oral bioavailability due to its inability to cross the gastrointestinal lining; to address this, researchers developed a new formulation using sodium deoxycholate/phospholipid-mixed nanomicelles (SDC/PL-MMs).
  • - The SDC/PL-MMs were created via a film dispersion method and characterized through various techniques, leading to nanoparticles with an average size of approximately 83 nm and a negative zeta potential, indicating stability.
  • - In studies, GL-SDC/PL-MMs demonstrated improved pharmacokinetic parameters and matched or exceeded the liver protection efficacy of the control in treating CCl(4)-induced liver injury
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