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1.
Int J Pharm ; 587: 119724, 2020 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-32755685

RESUMO

The purpose of this study was to develop an injectable submicron emulsion of eugenol (Eug-SE) and to investigate its antagonism on epilepsy. The formulation was optimized using a complete randomized design, comprising 5% (w/v) eugenol, 5% (w/v) soybean oil, 1.2% (w/v) egg phosphatidylcholine, 0.3% (w/v) poloxamer 188, and 0.03% (w/v) sodium oleate. The prepared Eug-SE was comprehensively evaluated in terms of its pharmaceutical characteristics, physicochemical stability, injection safety, antioxidant activity in vitro, and anti-epileptic effect in vivo. The mean particle size of Eug-SE was 176.1 ± 10.3 nm, the ζ-potential was -40.2 ± 1.8 mV, and the drug content was (95.3 ± 0.4) %. Moreover, the Eug-SE displayed excellent stability and improved safety compared to the eugenol solution. The Eug-SE (20 µg/mL) produced a significant neuroprotective effect against H2O2-induced oxidative damage in PC12 cells, which was attributed to the decrease of cellular reactive oxygen species level and mitochondrial damage. Besides, the in vivo test indicated that Eug-SE exerted an anti-epileptic effect in the PTZ treated mice. These results suggested that Eug-SE was a suitable dosage form of eugenol for injection, and displayed great therapeutic potential for neurological disease in the future.


Assuntos
Anticonvulsivantes , Eugenol , Animais , Emulsões/farmacologia , Peróxido de Hidrogênio/farmacologia , Camundongos , Estresse Oxidativo , Ratos
2.
J Microencapsul ; 36(3): 291-304, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31151361

RESUMO

Multidrug resistance is considered as a major obstacle for effective tumour chemotherapy. With the ability to deliver drugs into tumour cells, microparticles may act as a drug delivery vehicle to overcome drug resistance. In the present study, we developed an approach employing daunorubicin-loaded microparticles to surmount the drug resistance in leukaemia. The microparticles, derived from the drug-sensitive cells K562 and the drug-resistant cells K562/ADR, composed of cellular material, can effectively package drugs using intracellular and extracellular drug-loading method, respectively. The results demonstrated that the microparticles significantly improved the drug anti-tumour effect, which was influenced by the preparation methods and the source of donor cells. We further confirmed that the uptake of microparticles is mediated by an energy-driven endocytic process and mainly associated with clathrin-independent endocytosis and macropinocytosis. These results indicated that the microparticle could serve as a promising drug vehicle for the treatment of drug-resistant leukaemia.


Assuntos
Antibióticos Antineoplásicos/administração & dosagem , Daunorrubicina/administração & dosagem , Portadores de Fármacos/química , Leucemia/tratamento farmacológico , Antibióticos Antineoplásicos/farmacologia , Linhagem Celular Tumoral , Daunorrubicina/farmacologia , Sistemas de Liberação de Medicamentos , Resistencia a Medicamentos Antineoplásicos , Humanos
3.
Zhongguo Zhong Yao Za Zhi ; 42(4): 696-701, 2017 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-28959839

RESUMO

In this study, the tanshinone ⅡA loaded albumin nanoparticles were prepared by high pressure homogenization method. The formulation was optimized by central composite design-response surface method (CCD-RSM), with the particle size, encapsulation efficiency, and drug loading as indexes to investigate their in vitro anti-tumor effect. The results showed that the prepared nanoparticles had uniformly spherical morphology and uniform particle size distribution. The average particle size, encapsulation efficiency and drug loading of nanoparticles were about (175.7± 3.07) nm, 90.8%±1.47% and 5.52%±0.09%, respectively. Tanshinone ⅡA loaded albumin nanoparticles showed a more powerful antitumor effect than free tanshinone ⅡA for human promyelocytic leukemia NB4 cells. The preparation method of the drug-loaded albumin nanoparticles was simple and easy, and can significantly improve the solubility of tanshinone ⅡA, so it was helpful to extend its application in therapies against hematological malignancies.


Assuntos
Abietanos/farmacologia , Antineoplásicos Fitogênicos/farmacologia , Portadores de Fármacos , Albuminas , Linhagem Celular Tumoral , Humanos , Nanopartículas , Tamanho da Partícula
4.
Zhongguo Zhong Yao Za Zhi ; 42(11): 2085-2091, 2017 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-28822152

RESUMO

In the study, we developed a novel formulation, CD123 mono-antibody (mAb) modified tanshinone ⅡA loaded immunoliposome (CD123-TanⅡA-ILP) to achieve the targeted drug delivery for leukemia cells. Orthogonal test was used to optimize liposome preparation, and the TanⅡA-loaded PEGylated liposomes (TanⅡA-LP) of S100PC-Chol-(mPEG2000-DSPE)-TanⅡA at 19∶5∶1∶1 molar ratio were prepared by the thin film hydration-probe ultrasonic method. A post-insertion method was applied to prepare CD123-TanⅡA-ILP via thiolated mAb conjugated to the terminal of maleimide-PEG2000-DSPE. The cellular uptake assay was measured by flow cytometry, and the inhibitory effect of CD123-TanⅡA-ILP on NB4 cells proliferation was tested by using MTT assay. The results of cellular uptake assay showed that CD123-ILP could significantly increase the drug uptake of NB4 cells as compared with free drugs and LP. The IC50 values at 48 h incubation were 20.87, 11.71, 7.17 µmol•L⁻¹ respectively for TanⅡA,TanⅡA-LP and CD123-TanⅡA-ILP. CD123-ILP demonstrated a potential and promising targeted drug delivery strategy for acute myelogenous leukemia (AML) treatment.


Assuntos
Abietanos/farmacologia , Anticorpos Monoclonais/química , Antineoplásicos Fitogênicos/farmacologia , Sistemas de Liberação de Medicamentos , Lipossomos/química , Linhagem Celular Tumoral , Humanos , Subunidade alfa de Receptor de Interleucina-3/imunologia
5.
Drug Deliv ; 24(1): 882-890, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28574300

RESUMO

A novel niosomal delivery system was designed and investigated for the targeted delivery of daunorubicin (DNR) against acute myeloid leukemia (AML). Anti-CD123 antibodies conjugated to Mal-PEG2000-DSPE were incorporated into normal niosomes (NS) via a post insertion method to afford antibody-modified niosomes (CD123-NS). Next, NS was modified with varying densities of antibody (0.5 or 2%, antibody/Span 80, molar ratio), thus providing L-CD123-NS and H-CD123-NS. We studied the effect of antibody density on the uptake efficiency of niosomes in NB4 and THP-1 cells, on which CD123 express differently. Our results demonstrate CD123-NS showed significantly higher uptake efficiency than NS in AML cells, and the uptake efficiency of CD123-NS has been ligand density-dependent. Also, AML cells preincubated with anti-CD123 antibody showed significantly reduced cellular uptake of CD123-NS compared to control. Further study on the uptake mechanism confirmed a receptor-mediated endocytic process. Daunorubicin (DNR)-loaded H-CD123-NS demonstrated a 2.45- and 3.22-fold higher cytotoxicity, compared to DNR-loaded NS in NB4 and THP-1 cells, respectively. Prolonged survival time were observed in leukemic mice treated with DNR-H-CD123-NS. Collectively, these findings support that the CD123-NS represent a promising delivery system for the treatment of AML.


Assuntos
Leucemia Mieloide Aguda , Animais , Linhagem Celular Tumoral , Daunorrubicina , Subunidade alfa de Receptor de Interleucina-3 , Lipossomos , Camundongos
6.
J Nat Prod ; 80(5): 1697-1700, 2017 05 26.
Artigo em Inglês | MEDLINE | ID: mdl-28443671

RESUMO

A novel total synthesis of tanshinone I (1) via the intermediate 3-hydroxy-8-methyl-1,4-phenanthrenedione (8) is described. The low overall yields and the use of expensive reagents in the synthesis process were minimized by the use of the Diels-Alder reaction to directly construct the 1,4-phenanthrenedione scaffold, providing tanshinone I (1) in only three steps.


Assuntos
Abietanos/síntese química , Fenantrenos/síntese química , Abietanos/química , Reação de Cicloadição , Estrutura Molecular , Fenantrenos/química
7.
Mol Pharm ; 11(7): 2305-12, 2014 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-24830852

RESUMO

In this study, we report an active targeting liposomal formulation directed by a novel peptide (AA13) that specifically binds to the low density lipoprotein receptor (LDLR) overexpressed on acute myeloid leukemia (AML) cells. The objectives of this study were to evaluate the in vitro and in vivo tumor drug targeting delivery of AA13-anchored liposomes on AML cells. AA13 conjugated to the distal end of DSPE-PEG2000-maleimide was incorporated into the liposomes via a postinsertion method. To study the effect of the peptide decoration and density on tumor cell targeting and internalization by AML cells (THP-1 and NB4), stealth liposomes bearing 3% (peptide/S100PC, molar ratio, LL) and 7% (peptide/S100PC, molar ratio, HL) AA13 were prepared, respectively. Higher uptake of LL (1.9- and 2.6-fold) and HL (2.3- and 3.6-fold) targeted liposomes occurred in THP-1 and NB4 cells, respectively, compared to untargeted liposomes. An LDLR inhibitor was used to confirm inhibition of the receptor-mediated cellular association of AA13 modified liposome in both cells. Daunorubicin (DNR) demonstrated a 2.2- and 3.5-fold higher cytotoxicity with the HL formulation and a 1.2- and 2.0-fold higher cytotoxicity with the LL formulation compared to the unmodified liposomal formulation in THP-1 and NB4 cells, respectively. Tumor drug accumulation of DNR-loaded HL was greater than that of the untargeted liposome in the biodistribution assay. The in vivo efficacy study in BALB/c nude mice bearing NB4 xenografts treated with DNR loaded HL also showed more tumor volume inhibition and a longer survival time compared to the untargeted formulation. In conclusion, the AA13-anchored liposomes demonstrated desirable potential as a promising vector for enhanced AML tumor drug targeting.


Assuntos
Antineoplásicos/química , Antineoplásicos/farmacologia , Lipossomos/química , Lipossomos/farmacologia , Peptídeos/química , Peptídeos/farmacologia , Receptores de LDL/metabolismo , Animais , Linhagem Celular Tumoral , Química Farmacêutica/métodos , Daunorrubicina/química , Daunorrubicina/farmacologia , Sistemas de Liberação de Medicamentos/métodos , Humanos , Leucemia Mieloide Aguda/tratamento farmacológico , Maleimidas/química , Camundongos , Camundongos Nus , Fosfatidiletanolaminas/química , Polietilenoglicóis/química , Distribuição Tecidual
8.
Zhongguo Zhong Yao Za Zhi ; 39(19): 3748-52, 2014 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-25612433

RESUMO

The feasibility of simultaneously loading both liposoluble and water-soluble components of Salvia miltiorrhiza in emulsion was discussed, in order to provide new ideas in comprehensive application of effective components in S. miltiorrhiza in terms of technology of pharmaceutics. With tanshinone II (A) and salvianolic acid B as raw materials, soybean phospholipid and poloxamer 188 as emulsifiers, and glycerin as isoosmotic regulator, the central composite design-response surface method was employed to optimize the prescription. The coarse emulsion was prepared with the high-speed shearing method and then homogenized in the high pressure homogenizer. The biphasic drug-loading intravenous emulsion was prepared to investigate its pharmaceutical properties and stability. The prepared emulsion is orange-yellow, with the average diameter of 241 nm and Zeta potential of -35.3 mV. Specifically, the drug loading capacity of tanshinone II (A) and salvianolic acid B were 0.5 g x L(-1) and 1 g x L(-1), respectively, with a good stability among long-term retention samples. According to the results, the prepared emulsion could load liposoluble tanshinone II (A) and water-soluble salvianolic acid B simultaneously, which lays a pharmaceutical foundation for giving full play to the efficacy of S. miltiorrhiza.


Assuntos
Química Farmacêutica/métodos , Medicamentos de Ervas Chinesas/química , Salvia miltiorrhiza/química , Química Farmacêutica/instrumentação , Emulsões/química , Controle de Qualidade
9.
Zhongguo Zhong Yao Za Zhi ; 39(20): 3945-9, 2014 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-25751943

RESUMO

The content of the asarone submicro emulsion injection was determind by HPLC method, and thereby a quality evaluation method was established based on indexes of pH value, particle size, peroxide value, methoxy aniline values, free fatty acid, lysophosphatidylcholine, visible foreign substances, insoluble particle, sterility, bacterial endotoxin and impurities, etc. The results showed that the injection exhibited uniform physical appearance and all the products were in milkwhite liquid. The content of the three batches products were respectively 102.9%, 100.8%, 97.70% of the labeled amount, with mean particle size of 210-250 nm, and other indexes all met with the standards. The reserved samples showed no obvious change in terms of detection indexes and indicated good stability after the accelerated stability test and long-term stability for 12 months. The quality evaluation method established in this study could be applied to quality control and stability investigation of asarone submicron emulsion injection, which laid a basis for further clinical research and application.


Assuntos
Anisóis/química , Medicamentos de Ervas Chinesas/química , Emulsões/química , Derivados de Alilbenzenos , Cromatografia Líquida de Alta Pressão , Estabilidade de Medicamentos , Tamanho da Partícula , Controle de Qualidade
10.
Int J Pharm ; 450(1-2): 21-30, 2013 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-23608202

RESUMO

Severe adverse events have been frequently associated with taking the commercially available formulation of α-asarone injection (α-asarone-I). Hence, we sought to develop an intravenous lipid emulsion of α-asarone (α-asarone-LE), where we hypothesized that these adverse events could be prevented. Using a central composite design-response surface methodology, we developed and optimized an emulsion formulation of α-asarone-LE that composed of 10.0% (w/v) soybean oil, 0.4% (w/v) α-asarone, 1.2% (w/v) soybean lecithin, 0.3% (w/v) F68, and 2.2% (w/v) glycerol. The mean particle size of α-asarone-LE was 226±11 nm, the ζ-potential was -25.6±1.2 mV, the encapsulation efficiency was 99.2±0.1% and the drug loading efficiency was 3.45%. Stability, safety, and efficacy studies of α-asarone-LE were systematically investigated and compared to those of α-asarone-I. The α-asarone-LE not only showed a desired stability, but also exhibited excellent safety and improved efficacy in vivo, indicating its great potential for clinical application in the future.


Assuntos
Anisóis/administração & dosagem , Anti-Inflamatórios/administração & dosagem , Lecitinas/química , Polietilenoglicóis/química , Propilenoglicóis/química , Óleo de Soja/química , Derivados de Alilbenzenos , Animais , Anisóis/química , Anti-Inflamatórios/química , Asma/imunologia , Líquido da Lavagem Broncoalveolar/citologia , Contagem de Células , Hipersensibilidade a Drogas/etiologia , Estabilidade de Medicamentos , Orelha/irrigação sanguínea , Emulsões , Feminino , Cobaias , Injeções Intravenosas , Masculino , Camundongos , Coelhos , Ratos , Ratos Sprague-Dawley , Testes de Toxicidade Aguda , Veias/efeitos dos fármacos , Veias/patologia
11.
J Drug Target ; 21(4): 341-53, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23311747

RESUMO

BACKGROUND: Tetramethylpyrazine (TMP) is used to treat cerebrovascular and cardiovascular diseases. However, it displays a short half-life that restricts clinical applications. 2-Hydroxymethyl-3,5,6-trimethylpyrazine (HTMP) is the principal active metabolite of TMP, with similar activity of TMP. Therefore, it makes sense to improve the biopharmaceutical characteristics via HTMP bypassing TMP. PURPOSE: To prolong the half-life of HTMP and achieve improved bioavailability and efficacy compared to commercially available product of tetramethylpyrazine phosphate injection (TMPP-I). METHODS: A lipophilic prodrug of HTMP, palmitate of HTMP (HTMPP) was synthesized, and then the lipid emulsion of HTMPP was developed. The middle cerebral artery occlusion (MCAO) model was applied to evaluate the efficacy in different administration group. RESULTS AND DISCUSSION: The optimized formulation consisted of 1.5% (w/v) HTMPP, 15% (w/v) soybean oil, 1.2% (w/v) soybean lecithin and 0.3% (w/v) poloxamer 188. The AUC0-180 min and the half-life of HTMP in HTMPP-LE was 2.05-fold and 1.48-fold greater than that in TMPP-I. The brain AUC0-120 min of HTMP in HTMPP-LE group increased by 145.6% compared to that in TMPP-I group. These differences could be primarily attributed to dissimilar metabolism between HTMPP and TMP. Consistently, HTMPP-LE exhibited better efficacy on ischemia/reperfusion model than TMPP-I. CONCLUSION: The developed HTMPP-LE suggests a great therapeutic potential for clinical applications.


Assuntos
Palmitatos/química , Palmitatos/farmacocinética , Pirazinas/química , Pirazinas/farmacocinética , Animais , Área Sob a Curva , Disponibilidade Biológica , Química Farmacêutica/métodos , Emulsões/química , Emulsões/farmacocinética , Emulsões/farmacologia , Meia-Vida , Infarto da Artéria Cerebral Média/tratamento farmacológico , Masculino , Camundongos , Palmitatos/administração & dosagem , Pirazinas/administração & dosagem , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Distribuição Tecidual
12.
Pharm Dev Technol ; 18(4): 804-12, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-22335624

RESUMO

The purpose of this study is to develop a new formulation for prostaglandin E1 (PGE1)-loaded lipid emulsion (Lipo-PGE1) with improved stability and reduced biodegradation. High-pressure homogenization was used to prepare the Lipo-PGE1, and high-performance liquid chromatography and accelerated test were used to evaluate its physicochemical stability. A tissue homogenate incubation test was firstly established and validated to assess its biodegradation. The factors influencing the stability of Lipo-PGE1, including oil phase, emulsifier, pH value, and drug concentration were systematically investigated. The optimized formulation consisting of poloxamer188 1.5% (w/v), egg lecithin 0.5% (w/v), soybean oil 10.0% (w/v), oleic acid 0.24% (w/v), and glycerol 2.2% (w/v), with the pH value at 4.0, was defined and characterized. When compared with the currently available commercial product of Lipo-PGE1, the degradation percentage of this optimized Lipo-PGE1 reduced by 47.1% after sterilization, the drug remaining percentage increased by 13.9% after storage at 4°C over 6 months. Also, a significant reduction in biodegradation of the optimized Lipo-PGE1 in comparison with the commercial Lipo-PGE1 was observed by a tissue homogenate incubation test. Overall, we provided a novel formulation for Lipo-PGE1 with a better physicochemical stability and a less biodegradation than the currently available commercial product of Lipo-PGE1, indicating its potential superiority in clinical application.


Assuntos
Alprostadil/administração & dosagem , Excipientes/química , Lipídeos/química , Inibidores da Agregação Plaquetária/administração & dosagem , Alprostadil/química , Alprostadil/metabolismo , Animais , Cromatografia Líquida de Alta Pressão/métodos , Composição de Medicamentos , Estabilidade de Medicamentos , Armazenamento de Medicamentos , Emulsões , Concentração de Íons de Hidrogênio , Técnicas In Vitro , Camundongos , Inibidores da Agregação Plaquetária/química , Inibidores da Agregação Plaquetária/metabolismo , Fatores de Tempo
13.
Anticancer Drugs ; 23(8): 846-55, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22495618

RESUMO

This study has investigated the growth-inhibitory and apoptosis-inducing effects of dihydrotanshinone, tanshinone I, tanshinone IIA, and cryptotanshinone on hematological malignancy cell lines, aiming to explore their structure-activity relationship. The growth-inhibitory effects of the tanshinones on K562 and Raji cells were assessed using a modified MTT assay; the apoptosis-inducing effects were assessed by fluorescence microscopy and flow cytometry analysis. The changes in cellular morphology were observed using an inverted phase-contrast microscope. MTT results revealed that these tanshinones inhibited cell proliferation in a concentration-dependent and time-dependent manner. The IC50 values of dihydrotanshinone, tanshinone I, tanshinone IIA, and cryptotanshinone for K562 cells were 3.50, 13.52, 19.32, and 47.52 µmol/l at 24 h; 1.36, 4.70, 5.67, and 22.72 µmol/l at 48 h; and 1.15, 1.59, 2.82, and 19.53 µmol/l at 72 h, and the values for Raji cells were 3.30, 4.37, 12.92, and 52.36 µmol/l at 24 h; 1.55, 1.71, 6.54, and 25.45 µmol/l at 48 h; and 1.07, 1.38, 1.89, and 18.47 µmol/l at 72 h. The flow cytometry analysis demonstrated that these tanshinones induced apoptosis of K562 cells in a concentration-dependent manner, and dihydrotanshinone as well as tanshinone I were more potent than tanshinone IIA and cryptotanshinone. Some noticeable apoptotic morphologies could be observed by fluorescence microscopy on tanshinones-treated Raji cells. Collectively, these tanshinones caused growth inhibition and apoptosis in hematological malignancy cell lines, with dihydrotanshinone being the most potent, followed by tanshinone I, tanshinone IIA, and cryptotanshinone. These results suggested that the structure of aromatic ring A enhanced the cytotoxicity and the structure of ring C may have contributed to the cytotoxicity, but the mechanisms need to be further investigated.


Assuntos
Abietanos/farmacologia , Antineoplásicos Fitogênicos/farmacologia , Linfoma de Burkitt/tratamento farmacológico , Leucemia Mielogênica Crônica BCR-ABL Positiva/tratamento farmacológico , Abietanos/administração & dosagem , Abietanos/química , Antineoplásicos Fitogênicos/química , Apoptose/efeitos dos fármacos , Linfoma de Burkitt/patologia , Linhagem Celular Tumoral , Relação Dose-Resposta a Droga , Citometria de Fluxo , Humanos , Concentração Inibidora 50 , Células K562 , Leucemia Mielogênica Crônica BCR-ABL Positiva/patologia , Microscopia de Fluorescência , Fenantrenos/administração & dosagem , Fenantrenos/química , Fenantrenos/farmacologia , Relação Estrutura-Atividade , Fatores de Tempo
14.
Int J Pharm ; 424(1-2): 76-88, 2012 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-22226873

RESUMO

The purpose of this study was to develop a lipid emulsion of tanshinone IIA (Tan IIA-LE) for intravenous administration and to investigate its feasibility for future clinical practice. The formulation was optimized using central composite design-response surface methodology (CCD-RSM), and the homogenization process was investigated systematically. The Tan IIA-LE was evaluated in terms of stability, safety and in vitro anti-hepatoma activity. The formulation of Tan IIA-LE is composed of 0.05% (w/v) Tan IIA, 20% (w/v) soybean oil-MCT mixture (1:1, w/w), 1.2% (w/v) soybean lecithin, 0.3% (w/v) F68 and 2.2% (w/v) glycerol, a high pressure homogenization at 100 MPa for 3 cycles was selected as the optimal homogenization process. The Tan IIA-LE was light-sensitive but stable for at least 12 months at room temperature in dark. The safety study demonstrated that the Tan IIA-LE did not cause venous irritation or obvious acute toxicity. Furthermore, the Tan IIA-LE displayed significant anti-tumor activity against human hepatoma cell lines in vitro. Overall, the Tan IIA-LE developed in this study was suggested to be a suitable and safe dosage form of Tan IIA for intravenous administration and has potential in liver cancer therapy in future.


Assuntos
Abietanos/farmacologia , Antineoplásicos Fitogênicos/farmacologia , Emulsões Gordurosas Intravenosas/farmacologia , Abietanos/química , Abietanos/toxicidade , Animais , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/toxicidade , Carcinoma Hepatocelular/tratamento farmacológico , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Estabilidade de Medicamentos , Emulsões Gordurosas Intravenosas/química , Emulsões Gordurosas Intravenosas/toxicidade , Feminino , Humanos , Neoplasias Hepáticas/tratamento farmacológico , Masculino , Camundongos , Coelhos
15.
Zhongguo Shi Yan Xue Ye Xue Za Zhi ; 18(6): 1469-73, 2010 Dec.
Artigo em Chinês | MEDLINE | ID: mdl-21176353

RESUMO

The study was purposed to investigate the growth inhibitory effect of tanshinones on K562 cell line and the relationship between their structures and cytotoxicity. The modified MTT assay was adopted to measure the inhibitory effect of tanshinones at different concentrations and chemical structures on K562 cells, and the changes of cell morphology were observed by inverted phase contrast microscopy. The results indicated that the tanshinones could inhibit the proliferation of K562 cells effectively, and their cytotoxicities on K562 cells showed concentration- and time-dependent manners. The IC(50) of dihydrotanshinone I, tanshinone I, tanshinone IIA and cryptotanshinone at 24 hours were 0.91, 4.04, 5.95, 13.85 µg/ml at 48 hours were 0.37, 1.35, 1.71, 6.71 µg/ml; at 72 hours were 0.33, 0.46, 0.82, 6.02 µg/ml, respectively. It is concluded that all of the four tanshinones have proliferation inhibitory effect on K562 cell line, among them the dihydrotanshinone I is the most active one, followed by tanshinone I, tanshinone IIA and cryptotanshinone subsequently, indicating that the chemical structure of aromatic ring A of tanshinones can enhance their cytotoxicity and the structure of furan ring C may influence the cytotoxicity, but their mechanism is still remained to be further investigated.


Assuntos
Abietanos/farmacologia , Proliferação de Células/efeitos dos fármacos , Medicamentos de Ervas Chinesas/farmacologia , Humanos , Células K562 , Relação Estrutura-Atividade
16.
Int J Pharm ; 397(1-2): 147-54, 2010 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-20667672

RESUMO

The glycyrrhetinic acid-modified stealth cationic liposomes (GA-PEG-CLs) loaded with pDNA (GA-PEG-CLPs) were developed and found to transfect human hepatocellular carcinoma cell line HepG2 with high efficiency. GA-PEG-CLs were comprised of DOTAP, cholesterol (Chol) and glycyrrhetinic acid-polyethyleneglycol-cholesterol conjugate (GA-PEG-Chol). Agarose gel electrophoresis revealed that 5% GA-PEG-CLs constituted by DOTAP/Chol/GA-PEG-Chol at molar ratio of 50:45:5 could completely entrap pDNA at a lower liposomes/pDNA weight ratios of 4:1 (N/P ratio: 1.14). Compared to ordinary cationic liposomes (CLs), steric cationic liposomes (PEG-CLs) and 1% GA-PEG-CLs made from DOTAP/Chol/MPEG2000-Chol/GA-PEG-Chol at molar ratio of 50:45:4:1, 5% GA-PEG-CLs were found to possess the highest transfection efficiency as gene vectors in serum-free or serum-containing medium in PKCalpha over-expressed HepG2 cells but no significance difference in human embryonic kidney cell line HEK 293. Additionally, 5% GA-PEG-CLs have the lowest cytotoxicity on human normal hepatocyte cell line L02. The competitive inhibition experiments mediated by GA were carried out in HepG2 cells, which demonstrated that GA-PEG-CLs could deliver selectively pDNA to hepatoma cells by the targeting moiety GA. In conclusion, GA-PEG-CLs containing 5% GA-PEG-Chol might be one of the most potential gene vectors as hepatoma targeting therapy.


Assuntos
Colesterol/análogos & derivados , Ácido Glicirretínico , Lipossomos , Polietilenoglicóis , Transfecção , Carcinoma Hepatocelular/terapia , Cátions , Ácidos Graxos Monoinsaturados , Terapia Genética , Vetores Genéticos , Células HEK293 , Células Hep G2 , Humanos , Neoplasias Hepáticas/terapia , Tamanho da Partícula , Compostos de Amônio Quaternário
17.
Zhongguo Zhong Yao Za Zhi ; 33(11): 1249-52, 2008 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-18831197

RESUMO

OBJECTIVE: To prepare and evaluate an intravenous emulsion of tanshinone II(A). METHOD: Soybean phospholipid mixing with poloxamer 188 was used as emulsifier. Oleic acid and glycerol were used as co-emulsifier and isoosmotic adjusting agent, respectively. The coarse emulsion was first prepared and following homogenization was carried out for the coarse emulsion by using a high pressure homogenizer. RESULT: The average diameter of the prepared tanshinone II (A) emulsion was 211 nm with a zeta potential of -32. 1 mV. There had no changes of diameter, zeta potential, pH value, content and physical appearance for the tanshinone II (A) emulsion stored at 25 degrees C away from light during one year. CONCLUSION: The physicochemical properties of the prepared tanshinone II (A) emulsion was stable, which could meet the requirements of intravenous administration.


Assuntos
Fenantrenos/administração & dosagem , Fenantrenos/química , Abietanos , Centrifugação , Estabilidade de Medicamentos , Armazenamento de Medicamentos , Emulsões , Concentração de Íons de Hidrogênio , Injeções Intravenosas , Tamanho da Partícula , Controle de Qualidade , Temperatura
18.
Zhongguo Zhong Yao Za Zhi ; 33(1): 46-50, 2008 Jan.
Artigo em Chinês | MEDLINE | ID: mdl-18338619

RESUMO

OBJECTIVE: To compare the pharmacokinetics and tissue distribution of alpha-asarone in lipid emulsion and aqueous solution for injection and study the feasibility of lipid emulsion of alpha-asarone as the parenteral drug delivery system. METHOD: HPLC was used to determine the drug concentration in rat plasma and mice tissues after intravenous (i.v.) administration of lipid emulsion and aqueous solution of alpha-asarone at a single dose (40 mg x kg(-1)), respectively. RESULT: The plasma concentration-time profiles of lipid emulsion and aqueous solution of alpha-asarone after intravenous administration of them are similar and the drug concentration-time data were fitted to a two-compartment open model. The results of tissues distribution showed that distribution contents of alpha-asarone from lipid emulsion and aqueous solution in vivo are similar in lungs but lipid emulsion increased the uptake in livers and spleens, and decreased the uptake in hearts and kidneys for alpha-asarone. CONCLUSION: The plasma concentration-time profiles of alpha-asarone in lipid emulsion and aqueous solution are similar, but lipid emulsion significantly altered the tissue distribution of alpha-asarone, which may be beneficial to decrease its potential toxicity to heart and kidney.


Assuntos
Anisóis/sangue , Anisóis/farmacocinética , Emulsões/química , Injeções Intravenosas , Lipídeos/química , Derivados de Alilbenzenos , Animais , Anisóis/administração & dosagem , Cromatografia Líquida de Alta Pressão , Feminino , Cinética , Masculino , Camundongos , Ratos , Ratos Sprague-Dawley , Distribuição Tecidual
19.
Pharmazie ; 62(8): 614-9, 2007 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-17867558

RESUMO

3-succinyl-30-stearyl glycyrrhetinic acid (Suc-GLAOSt) was synthesized as a targeting molecule, and incorporated in ordinary to liposomes (LP) to prepare a liposome surface-modified with glycyrrhetinic acid (LP-GLA), which could bind to the hepatocyte through the specific binding site of glycyrrhetinic acid (GLA) on the surface of rat cellular membrane. The maximal molar ratio of Suc-GLAOSt to total lipids in LP-GLA was 1:10. Calcein loaded liposome (Cal-LP) and calcein loaded LP-GLA (Cal-LP-GLA) were prepared by an ethanol injection method. The average diameter of Cal-LP and Cal-LP-GLA was 65 nm +/- 16 nm and 68 nm +/- 21 nm, respectively. The characteristics of cellular uptake of the two types of liposome were investigated through cellular uptake and competitive inhibition experiments. The uptake of Cal-LP-GLA by rat hepatocytes was markedly higher (3.3-fold) than that of Cal-LP (P < 0.01). The uptake of Cal-LP-GLA was inhibited, but the uptake of Cal-LP was not influenced by adding extraneous GLA. LP-GLA may be internalized by hepatocytes via the specific binding site, and can be used as a novel and promising carrier for targeting drug delivery to hepatocytes.


Assuntos
Ácido Glicirretínico/farmacocinética , Hepatócitos/metabolismo , Animais , Células Cultivadas , Relação Dose-Resposta a Droga , Portadores de Fármacos , Fluoresceínas/química , Ácido Glicirretínico/administração & dosagem , Indicadores e Reagentes , Cinética , Lipossomos , Espectroscopia de Ressonância Magnética , Masculino , Microscopia Eletrônica de Transmissão , Tamanho da Partícula , Ratos , Ratos Wistar , Propriedades de Superfície
20.
Zhongguo Zhong Yao Za Zhi ; 31(15): 1237-40, 2006 Aug.
Artigo em Chinês | MEDLINE | ID: mdl-17048564

RESUMO

OBJECTIVE: Study the characteristics of absorption and separation of traditional Chinese medicine compound prescription using macroporous resin. METHOD: Study the techniquecs and characteristics of absorption and separation of a sample by macroporous resin, which is composed of coptis root, rhubarb and common anemarrhena rhizome, containing alkaloid, anthraquinone and saponin. RESULT: It is proved by qualitative and quantitative researches studies that after absorbed and separated by optimized technics process, most prime effective components or section fractions in traditional Chinese medicine compound prescription can be reserved maintained. CONCLUSION: If the techniquecs of separation is properly designed, the same kind of macropore resin can absorbd and separate various effective components or section in traditional Chinese medicine compound prescription which have with different chemical structures efficiently.


Assuntos
Plantas Medicinais , Resinas Sintéticas , Tecnologia Farmacêutica/métodos , Alcaloides/isolamento & purificação , Anemarrhena/química , Antraquinonas/isolamento & purificação , Coptis/química , Plantas Medicinais/química , Rheum/química , Saponinas/isolamento & purificação
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