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1.
Int J Biol Macromol ; 267(Pt 1): 131467, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38599436

RESUMEN

In recent years, Flammulina velutipes (F. velutipes) has attracted consequential attention in various research fields due to its rich composition of proteins, vitamins, amino acids, polysaccharides, and polyphenols. F. velutipes polysaccharides (FVPs) are considered as key bioactive components of F. velutipes, demonstrating multiple physiological activities, including immunomodulatory, anti-inflammatory, and antibacterial properties. Moreover, they offer health benefits such as antioxidant and anti-aging properties, which have exceptionally valuable clinical applications. Polysaccharides derived from different sources exhibit a wide range of biomedical functions and distinct biological activities. The varied biological functions of polysaccharides, coupled with their extensive application in functional foods and clinical applications, have prompted a heightened focus on polysaccharide research. Additionally, the extraction, deproteinization, and purification of FVPs are fundamental to investigate the structure and biological activities of polysaccharides. Therefore, this review provides a comprehensive and systematic overview of the extraction, deproteinization, purification, characterization, and structural elucidation of FVPs. Furthermore, the biological activities and mechanisms of FVPs have been further explored through in vivo and in vitro experiments. This review aims to provide a theoretical foundation and guide future research and development of FVPs.


Asunto(s)
Flammulina , Polisacáridos Fúngicos , Animales , Humanos , Antibacterianos/farmacología , Antibacterianos/química , Antiinflamatorios/farmacología , Antiinflamatorios/química , Antioxidantes/farmacología , Antioxidantes/química , Flammulina/química , Polisacáridos Fúngicos/química , Polisacáridos Fúngicos/farmacología , Factores Inmunológicos/farmacología , Factores Inmunológicos/química
2.
Eur J Pharmacol ; 974: 176620, 2024 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-38685305

RESUMEN

The incidence and mortality of breast cancer, the most common malignant tumor among women in the world, are increasing year by year, which greatly threatens women's health. Ferroptosis is an iron and lipid reactive oxygen species (ROS)-dependent process, a novel form of cell death that is distinct from apoptosis and is closely related to the progression of breast cancer. Inducing the occurrence of ferroptosis in tumor cells can effectively block its malignant progress in vivo. Oridonin (ORI), the primary active ingredient extracted from the Chinese herbal medicine Rabdosia rubescens, has been shown to cause glutathione depletion and directly inhibit glutathione peroxidase 4 induced cell death by ferroptosis, but its mechanism of action in breast cancer remains inadequately elucidated. Therefore, we further investigated whether ORI could promote RSL3-induced ferroptosis in breast cancer cells by regulating the oxidative stress pathway JNK/Nrf2/HO-1. In our study, we assessed cell survival of RSL3 and ORI treatment by MTT assay, and found that co-treatment with RSL3 and ORI inhibited cell proliferation, as evidenced by the cloning assay. To investigate the ability of ORI to promote RSL3-induced ferroptosis in breast cancer cells, we measured levels of ROS, malondialdehyde, glutathione, superoxide dismutase, and Fe2+ content. Lipid peroxidation, ROS, and mitochondrial membrane potential levels induced by co-treatment of ORI with RSL3 were reversed by ferrostatin-1, further confirming that the cell death induced by RSL3 and ORI was ferroptosis rather than other programmed cell death modes. Moreover, RSL3 and ORI co-treatment regulated the JNK/Nrf2/HO-1 axis, as demonstrated by western blotting and target activator validation. Our results showed that ORI could enhance the inhibitory effect of RSL3 on breast cancer cells viability via the induction of ferroptosis. Mechanistically, it potentiated RSL3-induced ferroptosis in breast cancer cells by activating the JNK/Nrf2/HO-1 axis. This study provides a theoretical basis for the application of ORI based on the mechanism of ferroptosis, and provides potential natural drug candidates for cancer prevention and treatment.


Asunto(s)
Neoplasias de la Mama , Diterpenos de Tipo Kaurano , Ferroptosis , Hemo-Oxigenasa 1 , Factor 2 Relacionado con NF-E2 , Estrés Oxidativo , Ferroptosis/efectos de los fármacos , Humanos , Factor 2 Relacionado con NF-E2/metabolismo , Neoplasias de la Mama/patología , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/tratamiento farmacológico , Estrés Oxidativo/efectos de los fármacos , Hemo-Oxigenasa 1/metabolismo , Diterpenos de Tipo Kaurano/farmacología , Femenino , Transducción de Señal/efectos de los fármacos , Línea Celular Tumoral , Especies Reactivas de Oxígeno/metabolismo , Supervivencia Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Proteínas Quinasas JNK Activadas por Mitógenos/metabolismo , Células MCF-7 , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Carbolinas
3.
Mini Rev Med Chem ; 24(16): 1535-1554, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38425115

RESUMEN

Selenium, an essential trace element of the human body, is pivotal in human health and disease prevention. Nevertheless, the narrow therapeutic index of selenium, where the toxic and therapeutic doses are close, limits its clinical utility. Significantly, nanoscale selenium synthesized by different methods using polysaccharides as stabilizers has low toxicity properties and exhibits excellent bioactivity. Its biological activities, such as anti-tumor, anti-inflammatory, antioxidant, antibacterial, and immune function enhancement, are improved compared with traditional organic and inorganic selenium compounds, conferring greater potential for application in biomedicine. Therefore, this review evaluates the advancements in various synthesis methodologies for polysaccharide selenium nanoparticles (Se NPs) and their biological activities. It aims to provide a comprehensive theoretical basis and research directions for the future development of highly efficient, minimally toxic, and biocompatible polysaccharide-Se NPs and the application of polysaccharide-Se NPs in biomedicine.


Asunto(s)
Antioxidantes , Nanopartículas , Polisacáridos , Selenio , Selenio/química , Selenio/farmacología , Polisacáridos/química , Polisacáridos/farmacología , Polisacáridos/síntesis química , Humanos , Nanopartículas/química , Antioxidantes/farmacología , Antioxidantes/química , Antioxidantes/síntesis química , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Animales , Antibacterianos/farmacología , Antibacterianos/química , Antibacterianos/síntesis química , Antiinflamatorios/química , Antiinflamatorios/farmacología , Antiinflamatorios/síntesis química
4.
Artículo en Inglés | MEDLINE | ID: mdl-37605407

RESUMEN

Oridonin, an active diterpenoid isolated from traditional Chinese herbal medicine, has received a rising attention for its remarkable roles in cancer therapy. In recent years, increasing evidence have revealed that oridonin inhibits the occurrence and development of tumor cells through multiple mechanisms, including induction of apoptosis and autophagy, cell cycle arrest, and inhibition of angiogenesis as well as migration and invasion. In addition, several molecular signal targets have been identified, including ROS, EGFR, NF-κB, PI3K/Akt, and MAPK. In this paper, we review considerable knowledge about the molecular mechanisms and signal targets of oridonin, which has been studied in recent years. It is expected that oridonin may be developed as a novel anti-tumor herbal medicine in human cancer treatment.

5.
Curr Mol Pharmacol ; 16(7): 691-706, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36453482

RESUMEN

In recent years, attention has increasingly focused on herbal medicines and their bioactive components attributed to their multi-target pharmacological activity and low side effects. Oridonin is a natural diterpenoid extracted from the traditional Chinese herb and is one of the main active components of Rabdosia rubescens. Modern pharmacological studies have shown that oridonin has anti-tumor, anti-bacterial, anti-inflammatory, anti-oxidant, cardiovascular protective, immunomodulatory, and other effects. Based on the published literature in recent years, we outline the pharmacological activities of oridonin, aiming to provide a theoretical basis for the design and development of new oridonin-based drugs, as well as to facilitate the process of oridonin for clinical use.


Asunto(s)
Antineoplásicos , Diterpenos de Tipo Kaurano , Diterpenos , Neoplasias , Humanos , Diterpenos de Tipo Kaurano/farmacología , Diterpenos de Tipo Kaurano/uso terapéutico , Diterpenos/farmacología , Diterpenos/uso terapéutico , Neoplasias/tratamiento farmacológico , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico , Antiinflamatorios/farmacología , Antiinflamatorios/uso terapéutico , Línea Celular Tumoral
6.
Pathol Res Pract ; 216(8): 153031, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32703495

RESUMEN

Oridonin has been found to be a potential anti-angiogenesis agent. However, its functional targets and the underlying mechanisms are still vague. In vitro studies we found that oridonin not only inhibited VEGF-induced cell proliferation, migration and tube formation but also caused G2/M phase arrest and triggered cellular apoptosis in HUVECs. In mechanistic studies revealed that oridonin exhibited the anti-angiogenic potency, at least in part, through the down-regulation of VEGFR2-mediated FAK/MMPs, mTOR/PI3K/Akt and ERK/p38 signaling pathways which led to reduced invasion, migration, and tube formation in HUVECs. Our results could provide evidence that oridonin exerts strong anti-angiogenesis activities via specifically targeting VEGFR2 and its signaling pathway.


Asunto(s)
Inhibidores de la Angiogénesis/farmacología , Diterpenos de Tipo Kaurano/farmacología , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Apoptosis/efectos de los fármacos , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Humanos , Factor A de Crecimiento Endotelial Vascular/metabolismo , Receptor 2 de Factores de Crecimiento Endotelial Vascular/metabolismo
7.
J Cell Biochem ; 120(3): 3736-3746, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30229997

RESUMEN

Oridonin, an active diterpenoid isolated from Rabdosia rubescens, has been reported for its antitumor activity on several cancers. However, its effect on human esophageal cancer remains unclear. In this study, we demonstrated that oridonin could inhibit the growth of human esophageal cancer cells both in vitro and in vivo. Oridonin not only suppressed the proliferation, but also induced cell cycle arrest and mitochondrial-mediated apoptosis in KYSE-30, KYSE-150, and EC9706 cells with dose-dependent manner. Further mechanism studies revealed that oridonin led cell cycle arrest in esophageal cancer cells via downregulating cell cycle-related proteins, such as cyclin B1 and CDK2, while upregulating p53 and p21. Oridonin also increased proapoptotic protein Bax and reduced antiapoptotic protein Bcl-2, as well as the increased expression of cleaved caspase-3, -8, and -9. In addition, oridonin treatment could significantly inhibit the PI3K/Akt/mTOR and Ras/Raf signaling pathway. In vivo results further demonstrated that oridonin treatment markedly inhibited tumor growth in the esophageal cancer xenograft mice model. Taken together, these results suggest that oridonin may be a potential anticancer agent for the treatment of esophageal cancer.


Asunto(s)
Antineoplásicos Fitogénicos/farmacología , Diterpenos de Tipo Kaurano/farmacología , Neoplasias Esofágicas/tratamiento farmacológico , Regulación Neoplásica de la Expresión Génica , Fosfatidilinositol 3-Quinasas/genética , Proteínas Proto-Oncogénicas c-akt/genética , Serina-Treonina Quinasas TOR/genética , Animales , Apoptosis/efectos de los fármacos , Apoptosis/genética , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Ciclina B1/antagonistas & inhibidores , Ciclina B1/genética , Ciclina B1/metabolismo , Quinasa 2 Dependiente de la Ciclina/antagonistas & inhibidores , Quinasa 2 Dependiente de la Ciclina/genética , Quinasa 2 Dependiente de la Ciclina/metabolismo , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/agonistas , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/genética , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/metabolismo , Neoplasias Esofágicas/genética , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/patología , Femenino , Humanos , Ratones , Ratones Desnudos , Mitocondrias/efectos de los fármacos , Mitocondrias/metabolismo , Mitocondrias/patología , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/antagonistas & inhibidores , Proteínas Proto-Oncogénicas c-akt/metabolismo , Proteínas Proto-Oncogénicas c-bcl-2/antagonistas & inhibidores , Proteínas Proto-Oncogénicas c-bcl-2/genética , Proteínas Proto-Oncogénicas c-bcl-2/metabolismo , Transducción de Señal , Serina-Treonina Quinasas TOR/antagonistas & inhibidores , Serina-Treonina Quinasas TOR/metabolismo , Carga Tumoral/efectos de los fármacos , Proteína p53 Supresora de Tumor/agonistas , Proteína p53 Supresora de Tumor/genética , Proteína p53 Supresora de Tumor/metabolismo , Ensayos Antitumor por Modelo de Xenoinjerto , Proteína X Asociada a bcl-2/agonistas , Proteína X Asociada a bcl-2/genética , Proteína X Asociada a bcl-2/metabolismo
8.
Artif Cells Nanomed Biotechnol ; 46(sup3): S297-S307, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30183382

RESUMEN

Graphene oxides (GO) is a promising building material to fabricate desired drug delivery system due to its excellent physicochemical properties. In this study, an innovative nano-drug (Ori@GE11-GO) was constructed based on GE11 peptide functionalized GO for targeted delivery of oridonin to realize the specific recognition of tumour cells and enhance anticancer efficiency. GE11 surface modification onto GO significantly increased the cellular uptake of GO in EGFR overexpressed oesophageal cancer cells (KYSE-30 and EC109 cells) than that of normal cells, indicating the EGFR targeting effects of Ori@GE11-GO. The internalized Ori@GE11-GO could accumulate into lysosomes and significantly inhibit the viability of cancer cells. Moreover, Ori@GE11-GO could effectively induce KYSE-30 and EC109 cells cycle arrest, apoptosis, mitochondrial membrane potential (△Ψm) disruption through the activation of apoptotic signalling pathways and the inhibition of EGFR/Ras/Raf/MEK/ERK signalling pathway, showing potential use of Ori@GE11-GO for cancer treatment. Taken together, this study demonstrates a good strategy for the construction of bio-functionalized GO drug delivery nanosystem to improve the cancer targeting efficiency of anticancer medicines.


Asunto(s)
Antineoplásicos , Apoptosis/efectos de los fármacos , Portadores de Fármacos , Neoplasias Esofágicas , Grafito , Nanopartículas , Antineoplásicos/química , Antineoplásicos/farmacocinética , Antineoplásicos/farmacología , Línea Celular Tumoral , Portadores de Fármacos/química , Portadores de Fármacos/farmacocinética , Portadores de Fármacos/farmacología , Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/patología , Grafito/química , Grafito/farmacocinética , Grafito/farmacología , Humanos , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Nanopartículas/química , Nanopartículas/uso terapéutico
9.
Bioinorg Chem Appl ; 2018: 1062562, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30073019

RESUMEN

Zinc oxide nanoparticles (ZnO NPs) are used in an increasing number of industrial products such as rubber, paint, coating, and cosmetics. In the past two decades, ZnO NPs have become one of the most popular metal oxide nanoparticles in biological applications due to their excellent biocompatibility, economic, and low toxicity. ZnO NPs have emerged a promising potential in biomedicine, especially in the fields of anticancer and antibacterial fields, which are involved with their potent ability to trigger excess reactive oxygen species (ROS) production, release zinc ions, and induce cell apoptosis. In addition, zinc is well known to keep the structural integrity of insulin. So, ZnO NPs also have been effectively developed for antidiabetic treatment. Moreover, ZnO NPs show excellent luminescent properties and have turned them into one of the main candidates for bioimaging. Here, we summarize the synthesis and recent advances of ZnO NPs in the biomedical fields, which will be helpful for facilitating their future research progress and focusing on biomedical fields.

10.
Pathol Res Pract ; 214(5): 691-699, 2018 May.
Artículo en Inglés | MEDLINE | ID: mdl-29567333

RESUMEN

Matrine, as a natural alkaloid isolated from the traditional herb medicine sophora flavescens, has been proved to possess excellent biological activities, including anticancer effects. Now, this research aims to assess the anticancer activities and the mechanism of matrine against esophageal cancer cells, we investigated the proliferative inhibition, apoptosis induction, as well as the underlying mechanism of matrine on esophageal cancer KYSE-150 cells. It was found that matrine could suppress KYSE-150 cell proliferation and significantly mediate cell apoptosis in a dose-dependent relation by increasing intracellular reactive oxygen species level and triggering mitochondrial membrane potential disruption. More precise mechanism studies demonstrated that matrine could up-regulate the expression of Bax proteins and down-regulate the expression of Bcl-2 proteins, as well as the activation about caspase-3, 8 and 9 in KYSE-150 cells. The morphological analysis of KYSE-150 cells exhibited that matrine could destroy the F-actin and nuclei structures and induce morphological damage with increased surface height distribution and roughness of cell membrane. These results not only demonstrated the potential anticancer activity mechanism of matrine at nanoscale, but also provide preliminary guidance for the treatment of esophageal cancer using matrine.


Asunto(s)
Proliferación Celular/efectos de los fármacos , Medicamentos Herbarios Chinos/farmacología , Mitocondrias/efectos de los fármacos , Especies Reactivas de Oxígeno/metabolismo , Alcaloides , Carcinoma de Células Escamosas/tratamiento farmacológico , Carcinoma de Células Escamosas/metabolismo , Línea Celular Tumoral , Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/metabolismo , Carcinoma de Células Escamosas de Esófago , Humanos , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Quinolizinas , Proteína X Asociada a bcl-2/metabolismo , Matrinas
11.
Nanoscale ; 9(42): 16365-16374, 2017 Nov 02.
Artículo en Inglés | MEDLINE | ID: mdl-29052674

RESUMEN

Poor bioavailability and non-specificity of chemotherapeutic agents are major challenges in breast cancer treatment. Antibodies and small molecules that block cell signaling pathways have shown promise in the clinic, but their application is also limited by the high costs and treatment dosages required. Novel therapies that aim to rapidly and specifically target malignant cells with long-lasting impact in the tumor microenvironment may ultimately improve clinical outcome in cancer patients. Here, we demonstrate that epidermal growth factor receptor (EGFR)-targeting GE11 peptides conjugated with PEGylated polylactic-co-glycolic acid (PLGA) nanoparticles can be used to effectively deliver an anti-cancer agent, curcumin, into EGFR-expressing MCF-7 cells in vitro and in vivo. Treatment of breast cancer cells and tumor-bearing mice with these curcumin-loaded nanoparticles gave rise to reduced phosphoinositide 3-kinase signaling, decreased cancer cell viability, attenuated drug clearance from the circulation, and suppressed tumor burden compared with free curcumin or non-EGFR targeting nanoparticles. The targeted nanoscale drug delivery system we describe here may provide a new strategy for the design of targeted cancer therapy vectors. Our study provides evidence that the efficacy of pharmacologic anti-cancer agents can be enhanced through their delivery in the form of modified nanoparticles that effectively target specific malignant cell types.


Asunto(s)
Neoplasias de la Mama/tratamiento farmacológico , Curcumina/administración & dosificación , Portadores de Fármacos , Receptores ErbB/química , Copolímero de Ácido Poliláctico-Ácido Poliglicólico/química , Animales , Femenino , Humanos , Células MCF-7 , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Nanopartículas , Fosfatidilinositol 3-Quinasas/metabolismo , Ensayos Antitumor por Modelo de Xenoinjerto
12.
Drug Deliv ; 24(1): 1549-1564, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-29019267

RESUMEN

Selenium nanoparticles (Se NPs) have attracted increasing interest in recent decades because of their anticancer, immunoregulation, and drug carrier functions. In this study, GE11 peptide-conjugated Se NPs (GE11-Se NPs), a nanosystem targeting EGFR over-expressed cancer cells, were synthesized for oridonin delivery to achieve enhanced anticancer efficacy. Oridonin loaded and GE11 peptide conjugated Se NPs (GE11-Ori-Se NPs) were found to show enhanced cellular uptake in cancer cells, which resulted in enhanced cancer inhibition against cancer cells and reduced toxicity against normal cells. After accumulation into the lysosomes of cancer cells and increase of oridonin release under acid condition, GE11-Ori-Se NPs were further transported into cytoplasm after the damage of lysosomal membrane integrity. GE11-Ori-Se NPs were found to induce cancer cell apoptosis by inducting reactive oxygen species (ROS) production, activating mitochondria-dependent pathway, inhibiting EGFR-mediated PI3K/AKT and inhibiting Ras/Raf/MEK/ERK pathways. GE11-Se NPs were also found to show active targeting effects against the tumor tissue in esophageal cancer bearing mice. And in nude mice xenograft model, GE11-Ori-Se NPs significantly inhibited the tumor growth via inhibition of tumor angiogenesis by reducing the angiogenesis-marker CD31 and activation of the immune system by enhancing IL-2 and TNF-α production. The selenium contents in mice were found to accumulate into liver, tumor, and kidney, but showed no significant toxicity against liver and kidney. This cancer-targeted design of Se NPs provides a new strategy for synergistic treating of cancer with higher efficacy and reduced side effects, introducing GE11-Ori-Se NPs as a candidate for further evaluation as a chemotherapeutic agent for EGFR over-expressed esophageal cancers.


Asunto(s)
Antineoplásicos/farmacología , Diterpenos de Tipo Kaurano/farmacología , Receptores ErbB/antagonistas & inhibidores , Péptidos/farmacología , Selenio/química , Animales , Antineoplásicos/administración & dosificación , Antineoplásicos/farmacocinética , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Diterpenos de Tipo Kaurano/administración & dosificación , Diterpenos de Tipo Kaurano/farmacocinética , Portadores de Fármacos/química , Liberación de Fármacos , Humanos , Interleucina-2/biosíntesis , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Ratones , Nanopartículas/química , Péptidos/administración & dosificación , Péptidos/farmacocinética , Molécula-1 de Adhesión Celular Endotelial de Plaqueta/antagonistas & inhibidores , Especies Reactivas de Oxígeno/metabolismo , Selenio/farmacocinética , Factor de Necrosis Tumoral alfa/biosíntesis
13.
Pharmacol Res ; 119: 479-489, 2017 05.
Artículo en Inglés | MEDLINE | ID: mdl-28411855

RESUMEN

As the active anticancer component of Rabdosia Rubescens, oridonin has been proved to show strong anticancer activity in cancer cells, which is also found to be closely related to its specific inhibition effects on the EGFR tyrosine kinase activity. In this study, atomic force microscopy based single molecule force spectroscopy (AFM-SMFS) was used for real-time and in-situ detection of EGF-EGFR interactions in living esophageal cancer KYSE-150 cells to evaluate the anticancer activity of oridonin for the first time. Oridonin was found to induce apoptosis and also reduce EGFR expression in KYSE-150 cells. AFM-SMFS results demonstrated that oridonin could inhibit the binding between EGF and EGFR in KYSE-150 cells by decreasing the unbinding force and binding probability for EGF-EGFR complexes, which was further proved to be closely associated with the intracellular ROS level. More precise mechanism studies based on AFM-SMFS demonstrated that oridonin treatment could decrease the energy barrier width, increase the dissociation off rate constant and decrease the activation energy of EGF-EGFR complexes in ROS dependent way, suggesting oridonin as a strong anticancer agent targeting EGF-EGFR interactions in cancer cells through ROS dependent mechanism. Our results not only suggested oridonin as a strong anticancer agent targeting EGF-EGFR interactions in ROS dependent mechanism, but also highlighted AFM-SMFS as a powerful technique for pharmacodynamic studies by detecting ligand-receptor interactions, which was also expected to be developed into a promising tool for the screening and mechanism studies of drugs.


Asunto(s)
Antineoplásicos Fitogénicos/farmacología , Diterpenos de Tipo Kaurano/farmacología , Factor de Crecimiento Epidérmico/metabolismo , Receptores ErbB/metabolismo , Neoplasias Esofágicas/tratamiento farmacológico , Especies Reactivas de Oxígeno/metabolismo , Antineoplásicos Fitogénicos/química , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Diterpenos de Tipo Kaurano/química , Neoplasias Esofágicas/metabolismo , Esófago/efectos de los fármacos , Esófago/metabolismo , Humanos , Isodon/química , Microscopía de Fuerza Atómica
14.
Sci Rep ; 6: 30782, 2016 07 29.
Artículo en Inglés | MEDLINE | ID: mdl-27469490

RESUMEN

Ursolic acid (UA) has proved to have broad-spectrum anti-tumor effects, but its poor water solubility and incompetent targeting property largely limit its clinical application and efficiency. Here, we synthesized a nanoparticle-based drug carrier composed of chitosan, UA and folate (FA-CS-UA-NPs) and demonstrated that FA-CS-UA-NPs could effectively diminish off-target effects and increase local drug concentrations of UA. Using MCF-7 cells as in vitro model for anti-cancer mechanistic studies, we found that FA-CS-UA-NPs could be easily internalized by cancer cells through a folate receptor-mediated endocytic pathway. FA-CS-UA-NPs entered into lysosome, destructed the permeability of lysosomal membrane, and then got released from lysosomes. Subsequently, FA-CS-UA-NPs localized into mitochondria but not nuclei. The prolonged retention of FA-CS-UA-NPs in mitochondria induced overproduction of ROS and destruction of mitochondrial membrane potential, and resulted in the irreversible apoptosis in cancer cells. In vivo experiments showed that FA-CS-UA-NPs could significantly reduce breast cancer burden in MCF-7 xenograft mouse model. These results suggested that FA-CS-UA-NPs could further be explored as an anti-cancer drug candidate and that our approach might provide a platform to develop novel anti-cancer drug delivery system.


Asunto(s)
Neoplasias de la Mama/tratamiento farmacológico , Quitosano/química , Ácido Fólico/administración & dosificación , Nanopartículas/química , Triterpenos/administración & dosificación , Animales , Neoplasias de la Mama/metabolismo , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Femenino , Ácido Fólico/farmacología , Humanos , Células MCF-7 , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Ratones , Mitocondrias/efectos de los fármacos , Mitocondrias/metabolismo , Triterpenos/farmacología , Ensayos Antitumor por Modelo de Xenoinjerto , Ácido Ursólico
15.
Scanning ; 38(6): 792-801, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27280953

RESUMEN

Polysaccharide compounds (PCs), which composed of different kinds of polysaccharides always isolated from different kinds of traditional Chinese medicine, are now attracting more and more attentions due to their strong immunomodulatory activities beyond the corresponding one-component polysaccharides. In this study, we demonstrated for the first time that PCs-1 and PCs-2 had strong immunomodulatory effects on macrophages both in in vitro and in vivo models by atomic force microscopy (AFM). By high resolution AFM imaging, PCs-1 and PCs-2 were found to inhibit LPS induced cell surface particle size and roughness increase in RAW264.7 macrophages, demonstrating the anti-inflammatory effects of PCs-1 and PCs-2 on macrophages. PCs-1 and PCs-2 were also proved to increase the particle size and roughness of resting RAW264.7 macrophages, which suggested that PCs could activate resting RAW264.7 macrophages. And additionally, PCs-1 and PCs-2 were also found to reverse the surface particle size and roughness decrease of peritoneal macrophages isolated from cyclophosphamide induced immunosuppressive mice, suggesting the activation effects of PCs-1 and PCs-2 on immunosuppressive macrophages. These results further enhanced our understanding of macrophage activations by direct imaging of cell surface ultrastructure and also highlighted AFM as a novel nanotool for macrophage detections. And most importantly, these results also indicated the outstanding immunomodulatory effects of PCs on macrophages, which therefore suggested that PCs could be served as a kind of novel immunomodulatory agents that would benefit human health. SCANNING 38:792-801, 2016. © 2016 Wiley Periodicals, Inc.


Asunto(s)
Factores Inmunológicos/farmacología , Macrófagos/efectos de los fármacos , Polisacáridos/farmacología , Animales , Células Cultivadas , Activación de Macrófagos/efectos de los fármacos , Macrófagos/ultraestructura , Ratones , Ratones Endogámicos BALB C , Microscopía de Fuerza Atómica
16.
Appl Microbiol Biotechnol ; 100(15): 6643-6652, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26883344

RESUMEN

Angiogenesis provides necessary nutrients and oxygen for tumor growth and metastasis; thus, every stage of angiogenesis process is the potential target for cancer therapies. Ursolic acid (UA) is reported to decrease tumor burden through anti-angiogenesis pathway, but its poor water solubility greatly limits its efficiency and clinical application. Here, a simple method for preparing UA-loaded chitosan nanoparticles (CH-UA-NPs) with anti-angiogenesis and anti-tumor activity was demonstrated. In vitro, CH-UA-NPs could significantly inhibit the proliferation, migration, and tube formation of human umbilical vascular endothelial cells (HUVECs). After uptake by HUVECs, CH-UA-NPs were mainly localized in lysosomes and mitochondria, but not nuclei. CH-UA-NPs induced the destruction of lysosome membrane integrity, collapse of mitochondrial membrane potential, and reorganization of cell cytoskeleton. All these changes led to the apoptosis or necrosis in HUVECs. In vivo, CH-UA-NPs could inhibit the angiogenesis in chicken chorioallantoic membrane (CAM) model and H22 xenograft model. Notably, comparing with free UA, such synthesized CH-UA-NPs could save about tenfold of UA doses, implying that this could significantly decrease the side effects induced by high doses of UA in biological organism. Our data showed that CH-UA-NPs and this nanoparticle-based drug delivery system could be as a potential drug candidate for anti-angiogenesis treatment.


Asunto(s)
Inhibidores de la Angiogénesis/farmacología , Quitosano/química , Membrana Corioalantoides/irrigación sanguínea , Portadores de Fármacos/química , Nanopartículas/química , Neovascularización Patológica/prevención & control , Triterpenos/farmacología , Animales , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Embrión de Pollo , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Humanos , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Ratones , Ratones Endogámicos BALB C , Mitocondrias/metabolismo , Neovascularización Patológica/tratamiento farmacológico , Triterpenos/química , Cicatrización de Heridas/efectos de los fármacos , Ensayos Antitumor por Modelo de Xenoinjerto , Ácido Ursólico
17.
Scanning ; 38(6): 525-534, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-26840764

RESUMEN

Mast cell degranulation is the typical anaphylaxis process of mast cells associated with the release of cytokines, eicosanoids and their secretory granules, which play very important roles in the allergic inflammatory response of the human body upon anaphylactogen stimulation. The calcium ionophore ionomycin is widely used as a degranulation induction agent for mast cell degranulation studies. In the present work, ionomycin-induced degranulation of RBL-2H3 basophilic leukemia cell line cells was investigated in vitro by high resolution atomic force microscopy (AFM). Ionomycin, which could increase the intracellular free Ca2+ level and ß-Hexosaminidase release, was found to induce the formation of a kind of peculiar vesicles in the cytoplasm area of RBL-2H3 cells. Those vesicles induced by ionomycin would desintegrate to release a larger amount of granules surrounding RBL-2H3 cells by the controlling of F-actin. These results provide the precise morphological information of ionomycin-induced mast cell degranulation at nanoscale, which could benefit our understanding of ionomycin-induced mast cell anaphylaxis model and also validate the applicability of AFM for the detection of allergic inflammatory response in mast cells. SCANNING 38:525-534, 2016. © 2016 Wiley Periodicals, Inc.


Asunto(s)
Ionóforos de Calcio/farmacología , Degranulación de la Célula/efectos de los fármacos , Ionomicina/farmacología , Mastocitos/efectos de los fármacos , Microscopía de Fuerza Atómica/métodos , Actinas/química , Calcio/metabolismo , Humanos , Mastocitos/fisiología , Mastocitos/ultraestructura , Células Tumorales Cultivadas , beta-N-Acetilhexosaminidasas/metabolismo
18.
Scanning ; 38(4): 322-8, 2016 07.
Artículo en Inglés | MEDLINE | ID: mdl-26435325

RESUMEN

Apigenin has shown to have killing effects on some kinds of solid tumor cells. However, the changes in cell membrane induced by apigenin on subcellular- or nanometer-level were still unclear. In this work, human esophageal cancer cells (EC9706 and KYSE150 cells) were employed as cell model to detect the cytotoxicity of apigenin, including cell growth inhibition, apoptosis induction, membrane toxicity, etc. MTT assay showed that apigenin could remarkably inhibit the growth and proliferation in both types of cells. Annexin V/PI-based flow cytometry analysis showed that the cytotoxic effects of apigenin in KYSE150 cells were mainly through early apoptosis induction, while in EC9706 cells, necrosis, and apoptosis were both involved in cell death. The morphological and ultrastructural properties induced by apigenin were investigated at single cellular- or nanometer-level using atomic force microscopy (AFM). Additionally, lactate dehydrogenase (LDH) leakage was measured to assess the changes in membrane permeability. The results indicated that apigenin increased the membrane permeability and caused leakage of LDH, which was consistent with damages on membrane ultrastructure detected by AFM. Therefore, membrane toxicity, including membrane ultrastructure damages and enhanced membrane permeability, played vital roles in apigenin induced human esophageal cancer cell apoptosis. SCANNING 38:322-328, 2016. © 2015 Wiley Periodicals, Inc.


Asunto(s)
Apigenina/farmacología , Apoptosis , Neoplasias Esofágicas/patología , Línea Celular Tumoral , Proliferación Celular , Humanos
19.
PLoS One ; 10(10): e0140935, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26496199

RESUMEN

High levels of intracellular reactive oxygen species (ROS) in cells is recognized as one of the major causes of cancer cell apoptosis and has been developed into a promising therapeutic strategy for cancer therapy. However, whether apoptosis associated biophysical properties of cancer cells are related to intracellular ROS functions is still unclear. Here, for the first time, we determined the changes of biophysical properties associated with the ROS-mediated oesophageal cancer KYSE-150 cell apoptosis using high resolution atomic force microscopy (AFM). Oridonin was proved to induce ROS-mediated KYSE-150 cell apoptosis in a dose dependent manner, which could be reversed by N-acetylcysteine (NAC) pretreatment. Based on AFM imaging, the morphological damage and ultrastructural changes of KYSE-150 cells were found to be closely associated with ROS-mediated oridonin-induced KYSE-150 cell apoptosis. The changes of cell stiffness determined by AFM force measurement also demonstrated ROS-dependent changes in oridonin induced KYSE-150 cell apoptosis. Our findings not only provided new insights into the anticancer effects of oridonin, but also highlighted the use of AFM as a qualitative and quantitative nanotool to detect ROS-mediated cancer cell apoptosis based on cell biophysical properties, providing novel information of the roles of ROS in cancer cell apoptosis at nanoscale.


Asunto(s)
Antineoplásicos Fitogénicos/farmacología , Apoptosis/efectos de los fármacos , Diterpenos de Tipo Kaurano/farmacología , Células Epiteliales/efectos de los fármacos , Especies Reactivas de Oxígeno/metabolismo , Acetilcisteína/farmacología , Antineoplásicos Fitogénicos/antagonistas & inhibidores , Línea Celular Tumoral , Diterpenos de Tipo Kaurano/antagonistas & inhibidores , Relación Dosis-Respuesta a Droga , Células Epiteliales/metabolismo , Células Epiteliales/ultraestructura , Esófago/efectos de los fármacos , Esófago/metabolismo , Esófago/ultraestructura , Depuradores de Radicales Libres/farmacología , Humanos , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Microscopía de Fuerza Atómica , Mitocondrias/efectos de los fármacos , Mitocondrias/metabolismo , Mitocondrias/patología , Estrés Oxidativo , Especies Reactivas de Oxígeno/agonistas , Especies Reactivas de Oxígeno/antagonistas & inhibidores
20.
Bioorg Med Chem Lett ; 23(20): 5544-51, 2013 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-24007917

RESUMEN

Chrysin (5,7-dihydroxylflavone, Chry) is a natural product extracted from plants, honey, and propolis. In this work, a novel chrysin-organogermanium(IV) complex (Chry-Ge) with enhanced anticancer activities was synthesized, and its potential anticancer effects against cancer cells were measured using various methods. MTT results showed that Chry-Ge had significant inhibition effects on the proliferation of MCF-7, HepG2 and Colo205 human cancer cell lines in a dose-dependent manner while had little cytotoxic effects on MCF-10A human normal cells (MCF-10A cells) with the same treatment of Chry-Ge. These results suggested that Chry-Ge possessed enhanced anticancer effects and high selectivity between cancer cells and normal cells. The immuno-staining results showed that the nuclei of MCF-7 cells represented a total fragmented morphology and a disorganized cytoskeletal network in MCF-7 cells after Chry-Ge treatment. Besides, atomic force microscopy (AFM) was applied to detect the changes of ultrastructural and biomechanical properties of MCF-7 cellular membrane induced by Chry-Ge. The AFM data indicated that Chry-Ge treatment directly caused the decrease of cell rigidity and adhesion force of MCF-7 cells, suggesting that membrane toxicity might be one of the targets for Chry-Ge in MCF-7 cells. Moreover, the fluorescence-based flow cytometric analysis demonstrated that Chry-Ge could induce apoptosis in MCF-7 cells in ROS-dependent mitochondrial pathway. All results collectively showed that Chry-Ge could be as a promising anticancer drug for cancer therapy.


Asunto(s)
Antineoplásicos/química , Complejos de Coordinación/química , Flavonoides/química , Germanio/química , Antineoplásicos/síntesis química , Antineoplásicos/toxicidad , Apoptosis/efectos de los fármacos , Caspasas/metabolismo , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Complejos de Coordinación/síntesis química , Complejos de Coordinación/toxicidad , Puntos de Control de la Fase G2 del Ciclo Celular/efectos de los fármacos , Células Hep G2 , Humanos , Células MCF-7 , Metaloproteinasas de la Matriz/metabolismo , Microscopía de Fuerza Atómica , Especies Reactivas de Oxígeno/metabolismo
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