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1.
Front Nutr ; 9: 822429, 2022.
Article in English | MEDLINE | ID: mdl-35252302

ABSTRACT

Alcoholic hepatitis (AH) has a high short-term mortality rate. Schisandra chinensis has the potential to ameliorate liver damage and be a source of prebiotics. We aimed to investigate whether Schisandra chinensis extract (SCE) can improve AH and the role of the small intestinal and cecal microbiota and their metabolites. UHPLC-QE-MS was used to analyze the chemical components of SCE. The chronic-plus-binge ethanol feeding model was used to induce AH in mice. 1H NMR was used to analyze intestinal metabolites. 16S rRNA-based high throughput sequencing was used to evaluate the effects of SCE on intestinal microbiota (IM). Intestinal microbiota transplantation was used to explore the role of IM in SCE treatment of AH. SCE ameliorated AH non-dose-dependently. SCE effectively improved liver inflammation and oxidative/nitrosative stress, strengthened intestinal barrier function, and regulated the composition of IM and the content of short-chain fatty acids (SCFAs) in AH mice. Samples from in vivo and in vitro SCE-altered IM improved liver status and regulated the IM. The administration of Lactobacillus plantarum and Bifidobacterium breve ameliorated AH to some extent. The administration of Enterococcus faecalis and Klebsiella oxytoca had partial beneficial effects on AH. Collectively, IM and metabolites were closely associated with the improvement of SCE on AH. The possible microbe targets were the growth inhibition of Escherichia-Shigella and the expansion of SCFA producers, such as Lactobacillus and Bifidobacterium. Schisandra chinensis can be considered as a safe and effective dietary supplement for the prevention and improvement of AH.

2.
Food Funct ; 13(5): 2832-2845, 2022 Mar 07.
Article in English | MEDLINE | ID: mdl-35179169

ABSTRACT

Obesity continues to be a global public health challenge. Litchi chinensis seed is rich in bioactive ingredients with pharmacological effects, such as hypoglycemic activity and anti-oxidation. This study aimed to assess the potential anti-obesity effects of L. chinensis seed and the changes of gut microbiota and mycobiota compositions in obese zebrafish induced by a high-fat diet. The anti-obesity effects were supplemented and validated in high-fat diet-induced obese mice. In this study, various chemical components of L. chinensis seed water and ethanol extracts were detected using UHPLC-QE-MS, and both extracts showed strong in vitro antioxidant activities. Network pharmacology analysis showed the potential of the extracts to improve obesity. Litchi chinensis seed powder, water and ethanol extracts decreased the weight of obese zebrafish, improved lipid accumulation and lipid metabolism, regulated appetite, and inhibited cell apoptosis and inflammation of the liver and intestine. They showed similar effects in obese mice, and also reduced the weight of fat tissues, regulated insulin resistance and glucose metabolism, and improved the intestinal barrier. Additionally, L. chinensis seed modulated the compositions of gut microbiota and mycobiota in zebrafish, with the regulation of the proportion of bacteria that produce short-chain fatty acids or affect intestine health, including Cetobacterium, Trichococcus, Aeromonas, Staphylococcus, and Micrococcaceae, and the proportion of fungi that produce mycotoxins or have special metabolic capacities, including Penicillium, Candida, Rhodotorula, and Trichoderma. Spearman's correlation analysis revealed the potential link between zebrafish obesity parameters, gut bacteria and fungi. Overall, these findings indicated that L. chinensis seed effectively improved obesity.


Subject(s)
Anti-Obesity Agents/pharmacology , Antioxidants/pharmacology , Litchi , Plant Extracts/pharmacology , Animals , Anti-Obesity Agents/chemistry , Antioxidants/chemistry , Diet, High-Fat , Disease Models, Animal , Gastrointestinal Microbiome/drug effects , Lipid Metabolism/drug effects , Male , Mice , Mice, Inbred C57BL , Obesity/prevention & control , Plant Extracts/chemistry , Seeds , Zebrafish
3.
Am J Chin Med ; 49(1): 41-67, 2021.
Article in English | MEDLINE | ID: mdl-33416023

ABSTRACT

Over a millennia, traditional Chinese medicine (TCM) has been used to treat various diseases in China. In recent years, more and more Chinese materia medica (CMM) have been studied in scientific research projects, applied in clinical practice, and their extracts have even appeared in some health products. However, the toxicity of some CMM is often overlooked, including hepatotoxicity, nephrotoxicity, neurotoxicity, cardiotoxicity, etc. In this review, the toxic components and their toxicological mechanisms of some toxic CMM were listed according to the chemical structure classification of toxic components. Afterwards, the traditional methods (processing and compatibility) and modern methods (structural modification, biotransformation, etc.) of attenuation of CMM were discussed. Since ancient times, it has been said that "fight fire with fire, fight poison with poison," and toxic CMM are of great significance in the treatment of difficult and severe diseases. The rational application of toxic CMM and their components in clinical practice was also exemplified in this review. While the pharmacological effects of TCMs have been emphasized, the scientific attenuation and rational application of toxic components should be concerned. We hope this review can provide a reference for future related research.


Subject(s)
Materia Medica/chemistry , Materia Medica/toxicity , Alkaloids , China , Flavones , Glycosides , Humans , Indoles , Isoquinolines , Materia Medica/pharmacology , Materia Medica/therapeutic use , Medicine, Chinese Traditional , Minerals , Monoterpenes , Oils, Volatile , Quinones , Terpenes , Tropanes
4.
ACS Omega ; 5(27): 16690-16700, 2020 Jul 14.
Article in English | MEDLINE | ID: mdl-32685836

ABSTRACT

Obesity is a metabolic disease and causes significant changes in host and gut microbial metabolite levels. However, little research has been done on the relationship between host and gut microbial metabolites. Thus, this study investigated the connection of the chemicals, based on the different effects of two Inonotus obliquus extracts on high-fat-diet-induced mice and their mechanisms. In this study, C57BL6/J mice fed with a high-fat diet were given I. obliquus ethanol extract (IOE) and polysaccharide (IOP). 1H NMR-based metabolomics, 16S rRNA sequencing, and real-time reverse transcription polymerase chain reaction (RT-PCR) were used to detect metabolites, cecal microbes, and expressions of genes in liver. IOE and IOP effectively improved the obesity of mice, including the adjustment of body weight gain, energy intake, energy efficiency, liver glucose metabolism and triglyceride metabolism, tricarboxylic acid (TCA) cycle, and degradation of three major nutrients (carbohydrate, lipid, and protein). IOE significantly increased cecal propionate based on Bacteroides and Akkermansia, thereby inhibiting energy intake and fat accumulation in mice. IOP remarkably improved the level of cecal butyrate by Lactobacillus and the Bacteroidales S24-7 group, resulting in increased energy consumption, and fat degradation by regulating the TCA cycle of the host. Two extracts containing different bioactive substances of I. obliquus improved obesity in mice through different effects on production of cecal microbial metabolites. Moreover, cecal butyrate (not propionate) was connected with chemicals of mice, including four metabolites of the TCA cycle and other metabolism-related chemicals.

5.
Appl Microbiol Biotechnol ; 104(1): 335-349, 2020 Jan.
Article in English | MEDLINE | ID: mdl-31758237

ABSTRACT

The potential of probiotics for treating ulcerative colitis (UC) has attracted increasing attention. However, more studies are still needed to guide physicians on the proper selection and use of probiotics. Here, we propose that combination of multiple probiotics with different functions can reduce intestinal inflammation. In this study, the effects of probiotics (Lactobacillus reuteri, Bacillus coagulans, Bifidobacterium longum, and Clostridium butyricum) on the physiology and histopathology of colon were evaluated in a dextran sulfate sodium (DSS)-induced colitis mouse model. The combined species, as well as the species individually, were tested and compared with sulfasalazine (SASP) and two Chinese herbal therapies. Results show that the functions of the four probiotic strains were different in regulating intestinal immunity and barrier function. The four-species probiotic cocktail was more effective than the species individually and anti-inflammatory drugs in repairing the dysbiosis of mucosal microbial ecology and reducing intestinal inflammation. The multi-strain probiotic mixture increased the proportion of beneficial bacteria and decreased the proportion of pro-inflammatory bacteria in the colonic mucosa. In addition, probiotic mixture significantly enhanced the expression of IL-10 and intestinal barrier function. These results suggest that a combination of multiple probiotics with different functions has synergistic effects and can restore the balance of interactions between microorganisms and immunological niches.


Subject(s)
Colitis/prevention & control , Colon/immunology , Colon/microbiology , Interleukin-10/immunology , Probiotics/administration & dosage , Animals , Colitis/chemically induced , Dextran Sulfate , Disease Models, Animal , Drugs, Chinese Herbal/administration & dosage , Dysbiosis , Gastrointestinal Microbiome , Inflammation , Interleukin-10/genetics , Intestinal Mucosa/microbiology , Male , Mice , Mice, Inbred C57BL , Specific Pathogen-Free Organisms , Sulfasalazine/administration & dosage
6.
J Microbiol Biotechnol ; 27(5): 965-974, 2017 May 28.
Article in English | MEDLINE | ID: mdl-28274103

ABSTRACT

The single-chain variable fragment (scFv) against lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) is a promising molecule for its potential use in the diagnosis and immunotherapy of atherosclerosis. Producing this scFv in several milligram amounts could be the starting point for further engineering and application of the scFv. In this study, the abundant expression of the anti-LOX-1 scFv was attempted using Escherichia coli (E. coli) and Brevibacillus choshinensis (B. choshinensis). The scFv had limited soluble yield in E. coli, but it was efficiently secreted by B. choshinensis. The optimized fermentation was determined using the Plackett-Burman screening design and response surface methodology, under which the yield reached up to 1.5 g/l in a 5-L fermentor. Moreover, the properties of the scFvs obtained from the two expression systems were different. The antigen affinity, transition temperature, and particle diameter size were 1.01E-07 M, 55.2 ± 0.3°C, and 9.388 nm for the scFv expressed by B. choshinensis, and 4.53E-07 M, 52.5 ± 0.3°C, and 13.54 nm for the scFv expressed by E. coli. This study established an efficient scale-up production methodology for the anti-LOX-1 scFv, which will boost its use in LOX-1-based therapy.


Subject(s)
Brevibacillus/metabolism , Escherichia coli/metabolism , Scavenger Receptors, Class E/drug effects , Single-Chain Antibodies/biosynthesis , Single-Chain Antibodies/pharmacology , Bioreactors , Biotechnology/methods , Brevibacillus/genetics , Cloning, Molecular , Culture Media/chemistry , Escherichia coli/genetics , Fermentation , Gene Expression Regulation, Bacterial , Genetic Vectors , Humans , Protein Stability , Recombinant Proteins/biosynthesis , Recombinant Proteins/chemistry , Recombinant Proteins/metabolism , Single-Chain Antibodies/chemistry , Single-Chain Antibodies/genetics , Temperature , Time Factors
7.
J Ultrasound Med ; 33(10): 1755-61, 2014 Oct.
Article in English | MEDLINE | ID: mdl-25253821

ABSTRACT

OBJECTIVES: This study aimed to investigate the effect of ultrasound sonication in the presence of methylene blue on clonogenic survival and mitochondria of ovarian cancer cells. METHODS: Human ovarian cancer HO-8910 cells, which were incubated with different concentrations of methylene blue for 1 hour, were exposed to an ultrasonic wave for 5 seconds with intensity of 0.46 W/cm(2). Clonogenic survival of HO-8910 cells after ultrasound sonication was measured by a colony-forming unit assay. Mitochondrial structural changes were observed on transmission electron microscopy, and the mitochondrial membrane potential was evaluated by confocal laser-scanning microscopy with rhodamine 123 staining. RESULTS: The colony-forming units of HO-8910 cells decreased considerably after ultrasound sonication in the presence of methylene blue. Transmission electron microscopy showed slightly enlarged mitochondria in the ultrasound-treated cells in the absence of methylene blue; however, seriously damaged mitochondria, even with almost complete disappearance of cristae, were found in the cells treated by ultrasound sonication in the presence of methylene blue. The mitochondrial membrane potential collapsed significantly when HO-8910 cells were treated by ultrasound sonication in the presence of methylene blue (P < .05). CONCLUSIONS: Ultrasound sonication in the presence of methylene blue markedly damaged mitochondrial structure and function and decreased clonogenic survival of HO-8910 cells.


Subject(s)
Enzyme Inhibitors/pharmacology , Methylene Blue/pharmacology , Mitochondria/pathology , Mitochondria/radiation effects , Ovarian Neoplasms/pathology , Ovarian Neoplasms/therapy , Sonication , Apoptosis/drug effects , Apoptosis/radiation effects , Cell Line, Tumor , Cell Survival , Female , Fluorescent Dyes , Humans , Membrane Potentials/drug effects , Membrane Potentials/radiation effects , Microscopy, Confocal , Microscopy, Electron , Mitochondria/drug effects , Rhodamine 123 , Tumor Cells, Cultured
8.
Photodiagnosis Photodyn Ther ; 9(4): 337-43, 2012 Dec.
Article in English | MEDLINE | ID: mdl-23200015

ABSTRACT

OBJECTIVES: Breast cancer is a common disease which threatens the life of women. To explore an alternative modality for combating breast cancer, a light-emitting diode (LED) that activates hypocrellin B was used in the present study to investigate apoptosis induction in breast cancer MDA-MB-231 cells. MATERIALS AND METHODS: Photocytotoxicity was investigated 24h after photodynamic treatment of hypocrellin B using MTT reduction assay and light microscopy. Apoptosis was observed 6h after photodynamic treatment using flow cytometry with Annexin V/PI staining as well as fluorescent microscopy with Hoechst33258 staining. The ultrastructure of the treated cells was observed using transmission electron microscopy (TEM). RESULTS: Hypocrellin B-induced photocytotoxicity in MDA-MB-231 cells exhibited a dose-dependent manner. The amount of MDA-MB-231 cells attached to the bottom of well decreased significantly after photodynamic treatment of hypocrellin B. Flow cytometry showed that the early and late apoptotic rate of MDA-MB-231 cells increased remarkably up to 17.46% and 32.80%, respectively, after treatment of LED-activated hypocrellin B. In addition, nuclear condensation, fragmentation and chromatin margination, and topical apoptotic body in the treated cells were observed by nuclear staining and TEM. CONCLUSION: Photodynamic action of hypocrellin B irradiated by light-emitting diodes could significantly kill breast cancer cells and induce apoptotic cell death, which suggests LED-activated hypocrellin B is a promising strategy for combating breast cancer.


Subject(s)
Apoptosis/radiation effects , Breast Neoplasms/radiotherapy , Low-Level Light Therapy/methods , Perylene/analogs & derivatives , Photosensitizing Agents/pharmacology , Quinones/pharmacology , Cell Line, Tumor , Dose-Response Relationship, Drug , Female , Flow Cytometry , Humans , Perylene/pharmacology
9.
Ultrasonics ; 51(4): 480-4, 2011 May.
Article in English | MEDLINE | ID: mdl-21183195

ABSTRACT

Sonodynamic therapy with pyropheophorbide-a methyl ester (MPPa) presents a promising aspect in treating liver cancer. The present study aims to investigate the mitochondrial damage of liver cancer cells induced by MPPa-mediated sonodynamic action. Mouse hepatoma cell line H(22) cells were incubated with MPPa (2 µM) for 20 h and then exposed to ultrasound with an intensity of 0.97 W/cm(2) for 8 s. Cytotoxicity was investigated 24h after sonodynamic action using MTT assay and light microscopy. Mitochondrial membrane potential (ΔΨm) was analyzed using flow cytometry with rhodamine 123 staining and ultrastructural changes were observed using transmission electron microscopy (TEM). The cytotoxicity of MPPa-mediated SDT on H(22) cell line was 73.00±3.42%, greater than ultrasound treatment alone (28.12±5.19%) significantly while MPPa treatment alone had no significant effect on H(22) cells. Moreover, after MPPa-mediated SDT cancer cells showed swollen mitochondria under TEM and a significant collapse of mitochondrial membrane potential. Our findings demonstrated that MPPa-mediated SDT could remarkably induce cell death of H(22) cells, and highlighted that mitochondrial damage might be an important cause of cell death induced by MPPa-mediated SDT.


Subject(s)
Carcinoma, Hepatocellular/drug therapy , Liver Neoplasms/drug therapy , Mitochondria, Liver/drug effects , Porphyrins/pharmacology , Ultrasonic Therapy/methods , Analysis of Variance , Animals , Cell Death/drug effects , Flow Cytometry , Membrane Potentials/drug effects , Mice , Microscopy, Electron , Mitochondrial Membranes/drug effects , Tumor Cells, Cultured
10.
Ultrasonics ; 51(3): 390-5, 2011 Apr.
Article in English | MEDLINE | ID: mdl-21147492

ABSTRACT

OBJECTIVE: The present study aims to investigate apoptosis of ovarian cancer cells induced by methylene blue (MB)-mediated sonodynamic therapy (SDT). METHODS: The MB concentration was kept constant at 100µM and ovarian cancer HO-8910 cells were exposed to ultrasound therapy for 5s with an intensity of 0.46W/cm(2). The cytotoxicity was investigated 24h after MB-mediated sonodynamic action. Apoptosis was analyzed using a flow cytometer with Annexin V-FITC and propidium iodine (PI) staining as well as fluorescence microscopy with Hoechst 33258 staining. Intracellular reactive oxygen species (ROS) level was measured by flow cytometer with 2,7-dichlorodihydrofluorescein diacetate (DCFH-DA) staining. RESULTS: The cytotoxicity of MB-mediated SDT on HO-8910 cells after MB-mediated SDT was significantly higher than those of other treatments including ultrasound alone, MB alone and sham treatment. Flow cytometric analysis showed a significant increase in the early and late apoptotic cell populations by MB-mediated SDT of HO-8910 cells. Nuclear condensation and increased ROS levels were also found in HO-8910 cells treated by MB-mediated SDT. CONCLUSIONS: Our findings demonstrated that MB-mediated sonodynamic action significantly induced apoptosis of HO-8910 cells and an increase in intracellular ROS level. This indicates that apoptosis is an important mechanism of cell death induced by MB-mediated SDT. Thus, MB-mediated SDT might be a potential therapeutic strategy for combating ovarian cancer.


Subject(s)
Apoptosis , Methylene Blue/pharmacology , Ovarian Neoplasms/therapy , Ultrasonic Therapy/methods , Analysis of Variance , Female , Flow Cytometry , Fluoresceins , Humans , Microscopy, Fluorescence , Reactive Oxygen Species , Tumor Cells, Cultured
11.
Ultrasonics ; 51(2): 165-70, 2011 Feb.
Article in English | MEDLINE | ID: mdl-20728195

ABSTRACT

OBJECTIVES: Curcumin, a natural pigment from the traditional Chinese herb, has shown promise as an efficient enhancer of ultrasound. The present study aims to investigate ultrasound-induced cellular destruction of nasopharyngeal carcinoma cells in the presence of curcumin in vitro. METHODS: Nasopharyngeal carcinoma cell line CNE2 cells were incubated by 10µm curcumin and then were treated by ultrasound for 8s at the intensity of 0.46W/cm(2). Cytotoxicity was evaluated using MTT assay and light microscopy. Mitochondrial damage was analyzed using a confocal laser scanning microcopy with Rhodamine 123 and ultrastructural changes were observed using a transmission electron microscopy (TEM). RESULTS: MTT assay showed that cytotoxicity induced by ultrasound treatment alone and curcumin treatment alone was 18.16±2.37% and 24.93±8.30%, respectively. The cytotoxicity induced by the combined treatment of ultrasound and curcumin significantly increased up to 86.67±7.78%. TEM showed that microvillin disappearance, membrane blebbing, chromatin condensation, swollen mitochondria, and mitochondrial myelin-like body were observed in the cells treated by ultrasound and curcumin together. The significant collapse of mitochondrial membrane potential (MMP) was markedly observed in the CNE2 cells after the combined treatment of curcumin and ultrasound. CONCLUSIONS: Our findings demonstrated that ultrasound sonication in the presence of curcumin significantly killed the CNE2 cells and induced ultrastructural damage and the dysfunction of mitochondria, suggesting that ultrasound treatment remarkably induced cellular destruction of nasopharyngeal carcinoma cells in the presence of curcumin.


Subject(s)
Curcumin/pharmacology , Nasopharyngeal Neoplasms/therapy , Ultrasonic Therapy/methods , Analysis of Variance , Apoptosis/drug effects , Apoptosis/radiation effects , Cell Line, Tumor , Humans , In Vitro Techniques , Microscopy, Confocal , Microscopy, Electron , Mitochondria/drug effects , Mitochondria/radiation effects , Nasopharyngeal Neoplasms/pathology
12.
Integr Cancer Ther ; 10(1): 70-6, 2011 Mar.
Article in English | MEDLINE | ID: mdl-20702493

ABSTRACT

OBJECTIVES: Curcumin, a natural pigment from a traditional Chinese herb, has been attracting extensive attention. The present study aims to investigate cell death of nasopharyngeal carcinoma (NPC) cells induced by ultrasound sonication in the presence of curcumin in vitro. METHODS: The NPC cell line CNE2 was chosen as a tumor model, and curcumin concentration was kept constant at 10 µM while the cells were subjected to ultrasound exposure for 8 s at an intensity of 0.46 W/cm(2). Cell death was evaluated using flow cytometry with annexinV-FITC and propidium iodine staining, and nuclear staining with Hoechst 33258. Mitochondrial membrane potential and intracellular reactive oxygen species (ROS) were analyzed using flow cytometry with rhodamine 123 and dichlorodihydrofluorecein diacetate staining. RESULTS: Flow cytometry showed that the combination of ultrasound and curcumin significantly increased the necrotic or late apoptotic rate by up to 31.37% compared with the controls. Nuclear condensation was observed in the nuclear staining, and collapse of ΔΨm and ROS increase were found in the CNE2 cells after the treatment with curcumin and ultrasound. CONCLUSIONS: The findings demonstrate that the presence of curcumin significantly enhances the ultrasound-induced cell death and ROS level, and induces the collapse of ΔΨm, suggesting that ultrasound sonication can increase the cell death of NPC cells in the presence of curcumin and that the treatment using curcumin and ultrasound together is a potential therapeutic modality in the management of malignant tumors.


Subject(s)
Antineoplastic Agents/pharmacology , Curcumin/pharmacology , Ultrasonics/methods , Carcinoma , Cell Death/drug effects , Cell Line, Tumor , Combined Modality Therapy , Humans , Membrane Potential, Mitochondrial/drug effects , Nasopharyngeal Carcinoma , Nasopharyngeal Neoplasms/drug therapy , Nasopharyngeal Neoplasms/metabolism , Nasopharyngeal Neoplasms/pathology , Nasopharyngeal Neoplasms/therapy , Reactive Oxygen Species/metabolism
13.
Integr Cancer Ther ; 9(4): 365-9, 2010 Dec.
Article in English | MEDLINE | ID: mdl-20702491

ABSTRACT

OBJECTIVE: The present study aims to investigate the possible mechanisms of hematoporphyrin monomethyl ether (HMME) enhancing the cytotoxicity of ultrasound in osteosarcoma cells. METHODS: Osteosarcoma cell line UMR-106 was treated by HMME and ultrasound radiation, with the HMME concentration kept at 20 µg/mL and ultrasound radiation for 10 seconds at the intensity of 0.5 W/cm². Cell proliferation was investigated at 12, 24, 36, and 48 hours using MTT assay after ultrasound and HMME treatment. Ultrastructural morphology was observed using transmission electron microscopy (TEM). Intracellular reactive oxygen species (ROS) was measured using a flow cytometry with DCFH-DA staining and intracellular free calcium ion (Ca(2+)) with Fluo-3-AM staining. RESULTS: The UMR-106 cells proliferated rapidly in the sham radiation and HMME treatment alone group, but ultrasound-treated cells and HMME-ultrasound-treated cells proliferated slowly. There was a significant difference between HMME-ultrasound treatment and the controls, including ultrasound radiation, HMME treatment alone, and sham radiation (P < .05). TEM showed endoplasmic reticulum and mitochondrial swelling in the ultrasound-treated cells, and more cells presented apoptosis and necrosis after treatment with ultrasound and HMME together. Intracellular ROS and Ca(2+) in the cells increased more significantly after both ultrasound and HMME treatment than after ultrasound treatment alone. CONCLUSIONS: HMME could effectively enhance the inhibition effect of ultrasound on osteosarcoma cells. Intracellular ROS and Ca(2+) in the UMR-106 cells increased more significantly after the treatment of HMME and ultrasound together, indicating that the enhancement of HMME on ultrasound cytotoxicity to osteosarcoma cells possibly involves both intracellular ROS and Ca(2+) elevation.


Subject(s)
Bone Neoplasms/therapy , Calcium/metabolism , Hematoporphyrins/pharmacology , Osteosarcoma/therapy , Radiofrequency Therapy , Reactive Oxygen Species/metabolism , Ultrasonic Therapy , Bone Neoplasms/metabolism , Bone Neoplasms/pathology , Bone Neoplasms/ultrastructure , Cell Line, Tumor , Cell Proliferation/drug effects , Cell Proliferation/radiation effects , Humans , Intracellular Space/drug effects , Intracellular Space/metabolism , Intracellular Space/radiation effects , Ions/metabolism , Microscopy, Electron, Transmission , Osteosarcoma/metabolism , Osteosarcoma/pathology , Osteosarcoma/ultrastructure , Radiation-Sensitizing Agents/pharmacology , Ultrasonic Therapy/methods , Up-Regulation/drug effects
14.
J Ultrasound Med ; 29(7): 1031-7, 2010 Jul.
Article in English | MEDLINE | ID: mdl-20587426

ABSTRACT

OBJECTIVE: This study aimed to investigate the sonodynamic action of pyropheophorbide-a methyl ester (MPPa) in liver cancer cells to explore a novel therapeutic modality. METHODS: H22 cells were chosen as model cells to investigate the sonodynamic action of MPPa on liver cancer. The MPPa concentration was kept constant at 2 micromol/L, and the cells were subjected to ultrasound exposure at an intensity of 0.97 W/cm(2). Cytotoxicity was investigated 24 hours after ultrasound exposure. Apoptosis was evaluated using flow cytometry with annexin V-fluorescein isothiocyanate and propidium iodine staining and nuclear staining with Hoechst 33258. Reactive oxygen species (ROS) were analyzed using flow cytometry with 2,7-dichlorodihydrofluorescein diacetate staining. RESULTS: No significant dark cytotoxicity of MPPa was shown in the H22 cells at the concentration of 2 micromol/L. The cell death rate induced by ultrasound treatment was significantly higher in the presence of MPPa than in the absence of it (P < .05). Flow cytometry showed that the sonodynamic action of MPPa significantly increased the early and late apoptotic rates of the H22 cells. Nuclear condensation and an ROS increase were found after sonodynamic treatment. CONCLUSIONS: Our findings showed that MPPa-mediated sonodynamic action significantly enhanced death of H22 cells and the ROS level, suggesting that MPPa is a novel sonosensitizer and the sonodynamic action of MPPa might be a potential therapeutic modality in the management of liver cancer.


Subject(s)
Liver Neoplasms/pathology , Liver Neoplasms/therapy , Porphyrins/therapeutic use , Ultrasonic Therapy , Animals , Drug Screening Assays, Antitumor , Mice , Photosensitizing Agents , Tumor Cells, Cultured , Ultrasonic Therapy/methods
15.
Ultrasonics ; 50(8): 777-81, 2010 Aug.
Article in English | MEDLINE | ID: mdl-20381823

ABSTRACT

BACKGROUND: Ultrasound therapy is a new modality in the control of malignant cancers. The aim of the present study was to investigate the effect of 5-aminolaevulinic acid on the ultrasonic killing action in the cancer cells. MATERIALS/METHODS: The K562 cells as a cancer cell model were subjected to investigate the effect of 5-aminolaevulinic acid (5-ALA) on the ultrasonic killing action, in which the 5-ALA concentration was 2mM and the ultrasound exposure was 15 s at the intensity of 0.46 W/cm(2) and the frequency of 1.7MHz. Cytotoxicity was investigated 24h after ultrasound exposure using the trypan blue exclusion test. Ultrastructural cell morphology and mitochondrial changes were observed using transmission electron microscopy (TEM). Mitochondrial membrane potential (DeltaPsim) was evaluated using Rhodamine 123 assay. RESULTS: The death rates of the K562 cells in the controls including sham radiation and 5-ALA treatment alone were 1.81+/-0.13%, 1.27+/-0.20%, respectively. Those in ultrasound radiation alone and 5-ALA-ultrasound treatment were 12.61+/-2.63%, 46.87+/-4.09%, respectively. There were significant differences between 5-ALA-ultrasound treatment, ultrasound radiation alone and the controls (P<0.05). TEM showed that the mitochondria expanding and some vacuoles were found in the ultrasound-treated cells. After the treatment of ultrasound and 5-ALA together some cells presented typical characteristics of apoptotic cells, such as nuclear condensation and crescent formation. Mitochondria of the cells were damaged more seriously than those treated by ultrasound alone, there were obvious swollen mitochondria and mitochondria in which cristae were almost perfectly disappeared, and more vacuolar mitochondria were founded. Mitochondrial membrane potential (DeltaPsim) was more significantly collapsed when the K562 cells were exposed to 2mM 5-ALA for 4h and then 0.46 W/cm(2) irradiation of ultrasound than ultrasound radiation alone. CONCLUSION: 5-ALA pretreatment significantly enhanced the cytotoxicity of ultrasound radiation in K562 cells. The damage of mitochondria structure and function might be an important cause of cell death in K562 cells induced by the treatment of ultrasound radiation and 5-ALA together.


Subject(s)
Aminolevulinic Acid/pharmacology , K562 Cells/drug effects , K562 Cells/radiation effects , Mitochondria/drug effects , Mitochondria/radiation effects , Ultrasonic Therapy , Apoptosis/drug effects , Apoptosis/radiation effects , Cell Line, Tumor , Humans , Membrane Potential, Mitochondrial
16.
J Ultrasound Med ; 29(1): 43-50, 2010 Jan.
Article in English | MEDLINE | ID: mdl-20040774

ABSTRACT

OBJECTIVE: The mitochondrion is an important target of ultrasound-induced cell death. This study aimed to investigate the mitochondrial damage in nasopharyngeal carcinoma (NPC) cells induced by ultrasound radiation in the presence of hypocrellin B (HB). METHODS: The NPC cell line CNE2 was used to investigate the effect of HB on ultrasonic action with an HB concentration of 2.5 mumol/L and ultrasound exposure for 15 seconds at an intensity of 0.65 W/cm(2). Cytotoxicity was investigated 24 hours after ultrasound exposure. Mitochondrial structure changes were observed by transmission electron microscopy. The mitochondrial membrane potential was evaluated by confocal laser-scanning microscopy with rhodamine 123 staining. RESULTS: The mean death rates of the CNE2 cells +/- SD were 25.14% +/- 1.50% after ultrasound radiation alone and 76.72% +/- 1.13% after ultrasound radiation in the presence of HB. Transmission electron microscopy showed that slightly enlarging mitochondria were found in the ultrasound-treated cells. After treatment with ultrasound and HB together, some cells had seriously damaged mitochondria, namely, obvious swollen mitochondria and mitochondria in which cristae had almost completely disappeared. The mitochondrial membrane potential was more significantly collapsed when the CNE2 cells were exposed to HB for 5 hours and then ultrasound at 0.65 mW/cm(2) than with ultrasound radiation alone (P < .05). CONCLUSIONS: Hypocrellin B significantly enhanced the cytotoxicity of ultrasound radiation in the CNE2 cells. The damage to the mitochondrial structure and function might be an important cause of death in the CNE2 cells induced by treatment with ultrasound radiation and HB together.


Subject(s)
Mitochondria/pathology , Mitochondria/radiation effects , Nasopharyngeal Neoplasms/pathology , Nasopharyngeal Neoplasms/therapy , Perylene/analogs & derivatives , Quinones/administration & dosage , Ultrasonic Therapy/methods , Apoptosis/drug effects , Apoptosis/radiation effects , Cell Line, Tumor , Humans , Mitochondria/drug effects , Perylene/administration & dosage , Radiation Dosage , Radiation-Sensitizing Agents/therapeutic use , Treatment Outcome
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